{"id":38349,"date":"2025-02-07T14:47:14","date_gmt":"2025-02-07T06:47:14","guid":{"rendered":"https:\/\/zetarmold.com\/?p=38349"},"modified":"2026-04-29T18:44:34","modified_gmt":"2026-04-29T10:44:34","slug":"%e5%b0%84%e5%87%ba%e6%88%90%e5%bd%a2%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e8%84%86%e6%80%a7","status":"publish","type":"post","link":"https:\/\/zetarmold.com\/ja\/%e5%b0%84%e5%87%ba%e6%88%90%e5%bd%a2%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e8%84%86%e6%80%a7\/","title":{"rendered":"\u5c04\u51fa\u6210\u5f62\u90e8\u54c1\u306e\u8106\u3055\u306e\u539f\u56e0\u3068\u89e3\u6c7a\u7b56\u3068\u306f\uff1f"},"content":{"rendered":"<p>\u5c04\u51fa\u6210\u5f62\u90e8\u54c1\u306e\u3082\u308d\u3055\u306f\u3001\u6027\u80fd\u4f4e\u4e0b\u3084\u6545\u969c\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u90e8\u54c1\u306e\u8010\u4e45\u6027\u3068\u751f\u7523\u52b9\u7387\u3092\u5411\u4e0a\u3055\u305b\u308b\u306b\u306f\u3001\u6839\u672c\u7684\u306a\u539f\u56e0\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n<p>\u5c04\u51fa\u6210\u5f62\u90e8\u54c1\u306e\u8106\u3055\u306e\u4e3b\u306a\u539f\u56e0\u306f\u4f55\u3067\u3059\u304b\uff1f <a href=\"https:\/\/zetarmold.com\/ja\/injection-mold-complete-guide\/\">\u5c04\u51fa\u6210\u5f62\u91d1\u578b\u8a2d\u8a08<\/a><sup id=\"fnref1:1\"><a href=\"#fn:1\" class=\"footnote-ref\">1<\/a><\/sup>[1]. Solutions include adjusting the molding parameters, using impact-resistant materials, and improving cooling rates.<\/p>\n<p>\u8106\u6027\u306b\u5bfe\u51e6\u3059\u308b\u306b\u306f\u3001\u6750\u6599\u7279\u6027\u3068\u5de5\u7a0b\u7ba1\u7406\u3092\u5fb9\u5e95\u7684\u306b\u691c\u8a0e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6210\u5f62\u54c1\u306e\u5f37\u5ea6\u3068\u6027\u80fd\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u3001\u6210\u5f62\u6761\u4ef6\u3068\u6750\u6599\u306e\u9078\u629e\u3092\u6700\u9069\u5316\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<div class=\"callout-key\" style=\"background:#f0f7ff; border-left:4px solid #2563eb; padding:1em 1.2em; border-radius:6px; margin:1.5em 0;\">\n<strong>\u8981\u70b9<\/strong><\/p>\n<ul>\n<li>Brittleness usually comes from a combined material, mold, process, and use-environment failure rather than one isolated variable.<\/li>\n<li>The fastest correction path is to verify resin condition, drying, melt temperature, injection speed, holding pressure, and cooling balance in sequence.<\/li>\n<li>A production-ready solution needs DFM, material testing, and process validation so the fix does not create new warpage or dimensional risks.<\/li>\n<\/ul>\n<\/div>\n<figure style=\"text-align:center;margin:2em 0;\">\n<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"457\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/quality-testing-molded-parts-800x457-1.jpg\" alt=\"Quality inspection of injection molded parts for brittleness control\" class=\"wp-image-53193 size-full\" style=\"max-width:100%;height:auto;\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/quality-testing-molded-parts-800x457-1.jpg 800w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/quality-testing-molded-parts-800x457-1-300x171.jpg 300w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/quality-testing-molded-parts-800x457-1-768x439.jpg 768w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/quality-testing-molded-parts-800x457-1-18x10.jpg 18w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/quality-testing-molded-parts-800x457-1-600x343.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption style=\"font-size:0.78em; color:#888; font-style:italic; margin-top:4px; text-align:center;\">\u54c1\u8cea\u691c\u67fb<\/figcaption><\/figure>\n<div class=\"claim claim-true\" style=\"background-color: #eff7ef; border-color: #eff7ef; color: #5a8a5a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#16a34a\" stroke-width=\"2\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><b>\u201cImproper cooling causes brittleness in injection molded parts.\u201d<\/b><span class=\"claim-true-or-false\">\u771f<\/span><\/p>\n<p class=\"claim-explanation\">\u6025\u6fc0\u306a\u51b7\u5374\u3084\u4e0d\u5747\u4e00\u306a\u51b7\u5374\u306f\u5185\u90e8\u5fdc\u529b\u306e\u539f\u56e0\u3068\u306a\u308a\u3001\u90e8\u54c1\u306e\u8106\u6027\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u9069\u5207\u306a\u51b7\u5374\u901f\u5ea6\u306f\u3001\u5fdc\u529b\u3092\u4f4e\u6e1b\u3057\u3001\u90e8\u54c1\u306e\u5f37\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002<\/p>\n<\/div>\n<div class=\"claim claim-false\" style=\"background-color: #f7e8e8; border-color: #f7e8e8; color: #8a4a4a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#dc2626\" stroke-width=\"2\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"\/><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"\/><\/svg><b>\u201cUsing the same material for all injection molded parts eliminates brittleness.\u201d<\/b><span class=\"claim-true-or-false\">\u507d<\/span><\/p>\n<p class=\"claim-explanation\">\u90e8\u54c1\u306f\u305d\u306e\u6a5f\u80fd\u306b\u3088\u3063\u3066\u5fc5\u8981\u3068\u3055\u308c\u308b\u6750\u6599\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u3059\u3079\u3066\u306e\u6750\u6599\u304c\u3059\u3079\u3066\u306e\u7528\u9014\u306b\u9069\u3057\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u306a\u304f\u3001\u6750\u6599\u306e\u9078\u629e\u3092\u8aa4\u308b\u3068\u8106\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n<h2>\u5c04\u51fa\u6210\u5f62\u54c1\u306e\u8106\u6027\u306f\u6750\u6599\u306e\u9078\u629e\u3067\u6c7a\u307e\u308b\uff1f<\/h2>\n<p>If you are comparing vendors or planning procurement, our <a href=\"https:\/\/zetarmold.com\/ja\/injection-molding-supplier-sourcing-guide\/\">supplier sourcing guide<\/a> covers RFQ prep, qualification, and commercial risk checks.<\/p>\n<p>The material choice in <a href=\"https:\/\/zetarmold.com\/ja\/injection-molding-complete-guide\/\">\u5c04\u51fa\u6210\u5f62<\/a><sup id=\"fnref1:2\"><a href=\"#fn:2\" class=\"footnote-ref\">2<\/a><\/sup> significantly influences the brittleness of molded products. Selecting the right material is crucial for achieving the desired durability and flexibility.<\/p>\n<p>ABS\u3001\u30dd\u30ea\u30ab\u30fc\u30dc\u30cd\u30fc\u30c8\u3001\u30ca\u30a4\u30ed\u30f3\u306a\u3069\u306e\u7d20\u6750\u306f\u3001\u3088\u308a\u5f37\u304f\u8010\u4e45\u6027\u306e\u3042\u308b\u6210\u5f62\u54c1\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u8106\u6027\u306f\u3001\u6e29\u5ea6\u3001\u6750\u6599\u7279\u6027\u3001\u52a0\u5de5\u6761\u4ef6\u306a\u3069\u306e\u8981\u56e0\u306b\u5f71\u97ff\u3055\u308c\u3001\u88fd\u54c1\u6027\u80fd\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3002<\/p>\n<h3>\u4e0d\u9069\u5207\u306a\u6750\u6599\u9078\u629e<\/h3>\n<p>For instance, the impact strength of polystyrene (PS) and <a href=\"https:\/\/zetarmold.com\/ja\/abs%e5%b0%84%e5%87%ba%e6%88%90%e5%bd%a2\/\">ABS injection molding<\/a><sup id=\"fnref1:3\"><a href=\"#fn:3\" class=\"footnote-ref\">3<\/a><\/sup>[2] can decrease at low temperatures. Using tougher materials such as polypropylene (PP), polyethylene (PE), or impact-modified grades can improve cold resistance and reduce brittle cracking in molded parts.<\/p>\n<h3>\u6750\u6599\u306e\u8001\u5316<\/h3>\n<p>\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u7d20\u6750\u306f\u3001\u71b1\u3001\u5149\u3001\u9178\u7d20\u306a\u3069\u306e\u8981\u56e0\u306b\u3088\u3063\u3066\u6642\u9593\u306e\u7d4c\u904e\u3068\u3068\u3082\u306b\u640d\u50b7\u3092\u53d7\u3051\u308b\u3002\u6750\u6599\u304c\u53e4\u304f\u306a\u308b\u306b\u3064\u308c\u3066\u3001\u6750\u6599\u306f\u5f90\u3005\u306b\u3082\u308d\u304f\u306a\u308a\u307e\u3059\u304c\u3001\u3053\u308c\u306f\u6750\u6599\u4e2d\u306b\u9396\u72b6\u69cb\u9020\u304c\u5b58\u5728\u3059\u308b\u305f\u3081\u3067\u3059\u3002\u9178\u5316\u9632\u6b62\u5264\u3084\u7d2b\u5916\u7dda\u5438\u53ce\u5264\u3092\u6dfb\u52a0\u3059\u308b\u3053\u3068\u3067\u3001\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u7d20\u6750\u306b\u5fc5\u8981\u306a\u7279\u6027\u3092\u9ad8\u3081\u3001\u7d4c\u5e74\u5909\u5316\u3092\u9577\u6301\u3061\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<h3>\u30ea\u30b5\u30a4\u30af\u30eb\u6750\u6599\u306e\u904e\u5270\u4f7f\u7528<\/h3>\n<p>\u518d\u751f\u6750\u306e\u6a5f\u68b0\u7684\u5f37\u5ea6\u306f\u901a\u5e38\u3001\u30d0\u30fc\u30b8\u30f3\u6750\u3088\u308a\u3082\u4f4e\u3044\u3002\u518d\u751f\u6750\u306e\u5272\u5408\u304c\u9ad8\u3059\u304e\u308b\u3068\u3001\u88fd\u54c1\u304c\u3082\u308d\u304f\u306a\u308a\u3084\u3059\u304f\u306a\u308b\u3002<\/p>\n<p>\u3055\u3089\u306b\u3001\u518d\u751f\u6750\u6599\u306f\u518d\u52a0\u5de5\u306e\u6bb5\u968e\u3067\u591a\u5c11\u52a3\u5316\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u3082\u3042\u308b\u3002\u30ea\u30b5\u30a4\u30af\u30eb\u6750\u306e\u5272\u5408\u3092\u7ba1\u7406\u3057\u3001\u5fc5\u8981\u306a\u54c1\u8cea\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u30ea\u30b5\u30a4\u30af\u30eb\u6750\u306e\u4f7f\u7528\u306b\u3088\u308b\u8106\u3055\u306e\u554f\u984c\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<div class=\"claim claim-true\" style=\"background-color: #eff7ef; border-color: #eff7ef; color: #5a8a5a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#16a34a\" stroke-width=\"2\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><b>\u201cChoosing the right material reduces brittleness in injection molded products.\u201d<\/b><span class=\"claim-true-or-false\">\u771f<\/span><\/p>\n<p class=\"claim-explanation\">ABS\u3084\u30dd\u30ea\u30ab\u30fc\u30dc\u30cd\u30fc\u30c8\u306e\u3088\u3046\u306a\u976d\u6027\u306e\u9ad8\u3044\u6750\u6599\u306f\u3001\u6210\u5f62\u54c1\u306e\u67d4\u8edf\u6027\u3068\u8010\u4e45\u6027\u3092\u5411\u4e0a\u3055\u305b\u3001\u3082\u308d\u3055\u3092\u8efd\u6e1b\u3059\u308b\u3002<\/p>\n<\/div>\n<div class=\"claim claim-false\" style=\"background-color: #f7e8e8; border-color: #f7e8e8; color: #8a4a4a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#dc2626\" stroke-width=\"2\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"\/><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"\/><\/svg><b>\u201cAll injection molded products are equally brittle regardless of material choice.\u201d<\/b><span class=\"claim-true-or-false\">\u507d<\/span><\/p>\n<p class=\"claim-explanation\">\u7d20\u6750\u306b\u3088\u3063\u3066\u5fdc\u529b\u4e0b\u3067\u306e\u6319\u52d5\u306f\u7570\u306a\u308b\u3002\u30dd\u30ea\u30ab\u30fc\u30dc\u30cd\u30fc\u30c8\u306e\u3088\u3046\u306b\u885d\u6483\u306b\u5f37\u304f\u3001\u30dd\u30ea\u30b9\u30c1\u30ec\u30f3\u306e\u3088\u3046\u306b\u3082\u308d\u304f\u306a\u308a\u306b\u304f\u3044\u3082\u306e\u3082\u3042\u308b\u3002<\/p>\n<\/div>\n<h2>\u5c04\u51fa\u6210\u5f62\u90e8\u54c1\u306e\u8106\u6027\u306b\u91d1\u578b\u8a2d\u8a08\u8981\u56e0\u304c\u4e0e\u3048\u308b\u5f71\u97ff\u3068\u306f\uff1f<\/h2>\n<p><strong>Mold design is a major brittleness control point.<\/strong> It controls melt flow, cooling balance, venting, and stress concentration, so poor gate location, unbalanced runners, sharp ribs, or uneven cooling can lock stress into the part.<\/p>\n<p>\u30b2\u30fc\u30c8\u4f4d\u7f6e\u3084\u51b7\u5374\u6642\u9593\u306a\u3069\u306e\u91d1\u578b\u8a2d\u8a08\u8981\u7d20\u306f\u3001\u6210\u5f62\u90e8\u54c1\u306e\u7d50\u6676\u5316\u3084\u5185\u90e8\u5fdc\u529b\u306b\u76f4\u63a5\u5f71\u97ff\u3057\u3001\u8106\u6027\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002\u9069\u5207\u306a\u8a2d\u8a08\u306f\u3001\u6b20\u9665\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u90e8\u54c1\u306e\u976d\u6027\u3068\u5bff\u547d\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002<\/p>\n<h3>\u30e9\u30f3\u30ca\u30fc\u3068\u30b2\u30fc\u30c8\u306e\u30c7\u30b6\u30a4\u30f3<\/h3>\n<p>\u30e9\u30f3\u30ca\u30fc\u3068\u30b2\u30fc\u30c8\u306e\u8a2d\u8a08\u304c\u60aa\u3044\u3068\u3001\u6eb6\u878d\u7269\u306e\u4f9b\u7d66\u304c\u4e0d\u5747\u7b49\u306b\u306a\u308a\u3001\u305d\u306e\u7d50\u679c\u3001\u92f3\u9020\u7269\u306b\u5fdc\u529b\u4e80\u88c2\u304c\u751f\u3058\u3001\u8106\u304f\u306a\u308b\u3002\u30d0\u30e9\u30f3\u30b9\u306e\u53d6\u308c\u305f\u30e9\u30f3\u30ca\u30fc\u8a2d\u8a08\u3068\u8907\u6570\u306e\u30b2\u30fc\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u6eb6\u878d\u7269\u306e\u6d41\u91cf\u3092\u5897\u52a0\u3055\u305b\u3001\u5fdc\u529b\u96c6\u4e2d\u306e\u5897\u5927\u3092\u907f\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<h3>\u91d1\u578b\u6e29\u5ea6\u5236\u5fa1<\/h3>\n<p>\u91d1\u578b\u6e29\u5ea6\u304c\u4f4e\u3059\u304e\u3066\u3082\u9ad8\u3059\u304e\u3066\u3082\u3001\u6eb6\u878d\u7269\u306e\u6d41\u308c\u3084\u51b7\u5374\u901f\u5ea6\u306b\u554f\u984c\u304c\u751f\u3058\u308b\u3002\u91d1\u578b\u6e29\u5ea6\u304c\u9ad8\u3051\u308c\u3070\u6750\u6599\u306e\u52a3\u5316\u306b\u3064\u306a\u304c\u308a\u3001\u4f4e\u3051\u308c\u3070\u6eb6\u878d\u7269\u306e\u6d41\u308c\u304c\u60aa\u304f\u306a\u308a\u3001\u30ad\u30e3\u30d3\u30c6\u30a3\u3078\u306e\u5145\u586b\u304c\u4e0d\u5b8c\u5168\u306b\u306a\u308a\u3001\u5185\u90e8\u5fdc\u529b\u304c\u767a\u751f\u3059\u308b\u3002\u3053\u306e\u554f\u984c\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u3001\u6e29\u5ea6\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u3092\u4f7f\u7528\u3057\u3066\u91d1\u578b\u6e29\u5ea6\u3092\u52b9\u679c\u7684\u306b\u5236\u5fa1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<h3>\u30d9\u30f3\u30c8\u30c7\u30b6\u30a4\u30f3<\/h3>\n<p>\u9069\u5207\u306a\u30d9\u30f3\u30c8\u8a2d\u8a08\u306f\u3001\u92f3\u7269\u304b\u3089\u7a7a\u6c17\u304c\u81ea\u7531\u306b\u6392\u51fa\u3055\u308c\u3001\u88fd\u54c1\u306b\u5fdc\u529b\u96c6\u4e2d\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u306e\u3042\u308b\u8106\u5f31\u30be\u30fc\u30f3\u304c\u5f62\u6210\u3055\u308c\u3001\u305d\u308c\u306b\u3088\u3063\u3066\u88fd\u54c1\u306e\u8106\u6027\u304c\u5897\u5927\u3059\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u30d9\u30f3\u30c8\u3068\u30d9\u30f3\u30c8\u30b9\u30ed\u30c3\u30c8\u3092\u6b63\u3057\u304f\u914d\u7f6e\u3057\u3001\u305d\u306e\u5f62\u72b6\u3092\u5236\u5fa1\u3059\u308b\u3053\u3068\u3067\u3001\u30d0\u30fc\u30f3\u30b9\u30eb\u30fc\u58c1\u4ed8\u8fd1\u306e\u7a7a\u9699\u3092\u56de\u907f\u3057\u3001\u5fdc\u529b\u96c6\u4e2d\u3092\u8efd\u6e1b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"claim claim-true\" style=\"background-color: #eff7ef; border-color: #eff7ef; color: #5a8a5a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#16a34a\" stroke-width=\"2\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><b>\u201cOptimizing mold design reduces brittleness in injection-molded parts.\u201d<\/b><span class=\"claim-true-or-false\">\u771f<\/span><\/p>\n<p class=\"claim-explanation\">\u6700\u9069\u5316\u3055\u308c\u305f\u30b2\u30fc\u30c8\u914d\u7f6e\u3068\u5236\u5fa1\u3055\u308c\u305f\u51b7\u5374\u306f\u3001\u5185\u90e8\u5fdc\u529b\u3092\u4f4e\u6e1b\u3057\u3001\u6750\u6599\u306e\u6d41\u308c\u3092\u6539\u5584\u3057\u3001\u8106\u6027\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3001\u90e8\u54c1\u306e\u8010\u4e45\u6027\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002<\/p>\n<\/div>\n<div class=\"claim claim-false\" style=\"background-color: #f7e8e8; border-color: #f7e8e8; color: #8a4a4a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#dc2626\" stroke-width=\"2\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"\/><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"\/><\/svg><b>\u201cUsing faster cooling rates always reduces brittleness.\u201d<\/b><span class=\"claim-true-or-false\">\u507d<\/span><\/p>\n<p class=\"claim-explanation\">\u51b7\u5374\u901f\u5ea6\u306f\u8106\u6027\u306b\u5f71\u97ff\u3059\u308b\u304c\u3001\u904e\u5ea6\u306b\u901f\u3044\u51b7\u5374\u306f\u5fdc\u529b\u5206\u5e03\u306e\u4e0d\u5747\u4e00\u3084\u5185\u90e8\u6b20\u9665\u306b\u3064\u306a\u304c\u308a\u3001\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u8106\u6027\u3092\u5897\u5927\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/p>\n<\/div>\n<h2>\u5c04\u51fa\u6210\u5f62\u306e\u8106\u3055\u3092\u6e1b\u3089\u3059\u305f\u3081\u306b\u52a0\u5de5\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u3069\u306e\u3088\u3046\u306b\u8abf\u6574\u3067\u304d\u308b\u304b\uff1f<\/h2>\n<p><strong>Processing parameter control is the fastest way to reduce brittleness after material selection.<\/strong> In our factory, our engineers validate trials on presses from 90 ton to 1850 ton so the final process window works under real production conditions.<\/p>\n<div class=\"factory-insight\" data-fact-ids=\"equipment.injection_machines_47,equipment.tonnage_90_1850,location.shanghai_factory\" style=\"background:#f0f7ff;border-left:4px solid #0066cc;padding:12px 16px;margin:1.5em 0;\"><strong>\ud83c\udfed ZetarMold Factory Insight<\/strong><br \/>In our factory, our engineers use more than 20 years of molding experience and 47 injection molding machines from 90 ton to 1850 ton to validate brittleness countermeasures against real press capacity, mold temperature control, material drying, and cooling constraints.<\/div>\n<p>Excessive injection speed beyond the required level may result in high shear stress within the mold, creating turbulence in the melt that breaks molecular chains and increases the brittleness of the part.<\/p>\n<h3>\u5c04\u51fa\u901f\u5ea6<\/h3>\n<p>Excessive injection speedthat is beyond the required level may result in high shear stress within the mold creating turbulence on the melt breaks molecular chains and thus increases the brittleness of the part.<\/p>\n<p>\u3057\u304b\u3057\u3001\u5c04\u51fa\u901f\u5ea6\u304c\u4f4e\u3044\u304b\u5c0f\u3055\u3044\u3068\u3001\u88fd\u54c1\u306b\u4e0d\u5747\u4e00\u307e\u305f\u306f\u90e8\u5206\u7684\u306b\u5145\u586b\u3055\u308c\u305f\u90e8\u5206\u3068\u5185\u90e8\u306e\u30dc\u30a4\u30c9\u3068\u5c04\u51fa\u6210\u5f62\u306e\u6b20\u9665\u304c\u751f\u3058\u308b\u3002\u4ee5\u4e0a\u306e\u5206\u6790\u306b\u95a2\u9023\u3057\u3066\u3001\u88fd\u54c1\u306e\u8106\u6027\u3092\u6e1b\u3089\u3059\u305f\u3081\u306b\u5236\u5fa1\u3059\u3079\u304d\u6700\u3082\u91cd\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u4e00\u3064\u306f\u3001\u5f53\u8a72\u6750\u6599\u306e\u5c04\u51fa\u901f\u5ea6\u3067\u3042\u308b\u3002<\/p>\n<h3>\u5c04\u51fa\u5727\u529b<\/h3>\n<p>\u5c04\u51fa\u5727\u529b\u304c\u9ad8\u3059\u304e\u308b\u3068\u3001\u4e0d\u8981\u306a\u5fdc\u529b\u304c\u52a0\u308f\u308a\u3001\u5206\u5b50\u9396\u304c\u5207\u65ad\u3055\u308c\u3001\u5185\u90e8\u5fdc\u529b\u304c\u96c6\u4e2d\u3059\u308b\u9818\u57df\u304c\u751f\u3058\u3001\u30d7\u30ed\u30bb\u30b9\u306e\u976d\u6027\u304c\u4f4e\u4e0b\u3059\u308b\u3002\u5c04\u51fa\u5727\u529b\u304c\u4f4e\u3044\u3068\u3001\u88fd\u54c1\u5bc6\u5ea6\u304c\u4e0d\u5747\u4e00\u306b\u306a\u308a\u3001\u8106\u6027\u304c\u5897\u52a0\u3059\u308b\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u5b9f\u9a13\u3092\u901a\u3058\u3066\u5c04\u51fa\u5727\u529b\u306e\u5024\u3092\u5236\u5fa1\u3059\u308b\u3053\u3068\u3067\u3001\u88fd\u54c1\u306e\u8106\u6027\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u6eb6\u878d\u6e29\u5ea6<\/h3>\n<p>\u6eb6\u878d\u6e29\u5ea6\u304c\u9ad8\u3044\u3068\u3001\u6750\u6599\u306e\u71b1\u52a3\u5316\u304c\u4fc3\u9032\u3055\u308c\u3001\u5206\u5b50\u9396\u304c\u7834\u58ca\u3055\u308c\u3001\u8106\u304f\u306a\u308b\u3002\u6eb6\u878d\u6e29\u5ea6\u304c\u4f4e\u3044\u3068\u6d41\u52d5\u6027\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u3001\u5145\u586b\u30e0\u30e9\u3084\u54c1\u8cea\u554f\u984c\u306b\u3064\u306a\u304c\u308b\u3002<\/p>\n<p>\u6eb6\u878d\u6e29\u5ea6\u306b\u5bfe\u3059\u308b\u7570\u306a\u308b\u6750\u6599\u306e\u611f\u5ea6\u306f\u3001\u88fd\u54c1\u306e\u976d\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u6eb6\u878d\u6e29\u5ea6\u3092\u3042\u308b\u7bc4\u56f2\u306b\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u3067\u89e3\u6c7a\u3067\u304d\u308b\u3002<\/p>\n<h3>\u4fdd\u6301\u5727\u529b\u3068\u51b7\u5374\u6642\u9593<\/h3>\n<p>Short holding pressure time leads to uneven internal density and increased brittleness; excessive holding time can leave residual stress in the molded part. If the product is demolded before full solidification, deformation and brittle cracking can appear later. Determining the right holding pressure, holding time, and cooling time through systematic molding trials can effectively reduce brittleness while protecting dimensional stability.<\/p>\n<div class=\"claim claim-true\" style=\"background-color: #eff7ef; border-color: #eff7ef; color: #5a8a5a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#16a34a\" stroke-width=\"2\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><b>\u201cIncreasing mold temperature reduces brittleness in injection molding.\u201d<\/b><span class=\"claim-true-or-false\">\u771f<\/span><\/p>\n<p class=\"claim-explanation\">\u91d1\u578b\u6e29\u5ea6\u304c\u9ad8\u3044\u3068\u3001\u6750\u6599\u304c\u3088\u308a\u5747\u4e00\u306b\u6d41\u308c\u3001\u5185\u90e8\u5fdc\u529b\u304c\u6e1b\u5c11\u3057\u3001\u8106\u304f\u306a\u308b\u306e\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<\/div>\n<div class=\"claim claim-false\" style=\"background-color: #f7e8e8; border-color: #f7e8e8; color: #8a4a4a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#dc2626\" stroke-width=\"2\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"\/><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"\/><\/svg><b>\u201cSlower cooling rates always reduce brittleness in injection molding.\u201d<\/b><span class=\"claim-true-or-false\">\u507d<\/span><\/p>\n<p class=\"claim-explanation\">\u51b7\u5374\u901f\u5ea6\u3092\u9045\u304f\u3059\u308b\u3053\u3068\u3067\u8106\u3055\u3092\u6291\u3048\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u304c\u3001\u3059\u3079\u3066\u306e\u7d20\u6750\u306b\u6700\u9069\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u5404\u7d20\u6750\u306b\u306f\u3001\u5f37\u5ea6\u3068\u52b9\u7387\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u3068\u308b\u305f\u3081\u306e\u7406\u60f3\u7684\u306a\u51b7\u5374\u901f\u5ea6\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n<h2>\u74b0\u5883\u8981\u56e0\u306f\u5c04\u51fa\u6210\u5f62\u6750\u6599\u306e\u8106\u3055\u306b\u3069\u3046\u5f71\u97ff\u3059\u308b\u304b\uff1f<\/h2>\n<p><strong>Environmental control is required because moisture, chemical exposure, and service temperature can change toughness after molding.<\/strong> Hygroscopic materials need drying and storage control, while cold, hot, outdoor, or chemical-use parts need resin testing that matches the real use environment.<\/p>\n<p>\u74b0\u5883\u56e0\u5b50\u306f\u5c04\u51fa\u6210\u5f62\u6750\u6599\u306e\u8106\u3055\u3092\u5897\u6e1b\u3055\u305b\u308b\u3002\u9ad8\u6e7f\u5ea6\u3084\u6975\u7aef\u306a\u6e29\u5ea6\u306f\u6750\u6599\u306e\u52a3\u5316\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u4e00\u65b9\u3001\u5236\u5fa1\u3055\u308c\u305f\u74b0\u5883\u306f\u6750\u6599\u306e\u976d\u6027\u3068\u5bff\u547d\u3092\u5411\u4e0a\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/p>\n<h3>\u6e7f\u5ea6<\/h3>\n<p>Some plastic materials are highly hygroscopic, and once the plastic absorbs moisture, its mechanical properties change. For example, polyamide (nylon) can become brittle and fragile after absorbing moisture. Therefore, the humidity during production and storage should be controlled, or dehumidifiers should be used to reduce this problem.<\/p>\n<p>\u4f7f\u7528\u74b0\u5883\u306e\u6e29\u5ea6\u5909\u5316\u306f\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u88fd\u54c1\u306e\u8106\u6027\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3002\u4f4e\u6e29\u306f\u6750\u6599\u3092\u8106\u304f\u3057\u3001\u9ad8\u6e29\u306f\u6750\u6599\u306e\u8001\u5316\u3068\u52a3\u5316\u3092\u4fc3\u9032\u3059\u308b\u3002\u7279\u5b9a\u306e\u4f7f\u7528\u74b0\u5883\u306b\u9069\u3057\u305f\u6750\u6599\u3092\u9078\u629e\u3057\u3001\u6e29\u5ea6\u7ba1\u7406\u5bfe\u7b56\u3092\u8b1b\u3058\u308b\u3053\u3068\u3067\u3001\u6e29\u5ea6\u5909\u5316\u306b\u3088\u308b\u6750\u6599\u306e\u3082\u308d\u3055\u306e\u5f71\u97ff\u3092\u514b\u670d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<h3>\u5316\u5b66\u74b0\u5883<\/h3>\n<p>\u4e00\u90e8\u306e\u5316\u5b66\u85ac\u54c1\u306f\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u6750\u6599\u3092\u4fb5\u3057\u3001\u305d\u306e\u7d50\u679c\u3001\u6750\u6599\u306e\u6a5f\u68b0\u7684\u7279\u6027\u304c\u52a3\u5316\u3057\u3001\u5168\u4f53\u7684\u306b\u3082\u308d\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308b\u3002\u4f8b\u3048\u3070\u3001\u9178\u6027\u6eb6\u6db2\u3084\u30a2\u30eb\u30ab\u30ea\u6027\u6eb6\u6db2\u3001\u6709\u6a5f\u6eb6\u5264\u306a\u3069\u3067\u3042\u308b\u3002\u88fd\u54c1\u306e\u4f7f\u7528\u74b0\u5883\u3092\u7406\u89e3\u3057\u3001\u8010\u85ac\u54c1\u6027\u3092\u6301\u3064\u6750\u6599\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u3001\u5316\u5b66\u74b0\u5883\u306b\u3088\u308b\u8106\u6027\u3092\u52b9\u679c\u7684\u306b\u4f4e\u6e1b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"claim claim-true\" style=\"background-color: #eff7ef; border-color: #eff7ef; color: #5a8a5a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#16a34a\" stroke-width=\"2\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><b>\u201cEnvironmental factors can increase brittleness of injection-molded materials.\u201d<\/b><span class=\"claim-true-or-false\">\u771f<\/span><\/p>\n<p class=\"claim-explanation\">\u9ad8\u6e7f\u5ea6\u3001\u6975\u7aef\u306a\u6e29\u5ea6\u3001\u5316\u5b66\u85ac\u54c1\u306b\u3055\u3089\u3055\u308c\u308b\u3068\u7d20\u6750\u304c\u5f31\u304f\u306a\u308a\u3001\u3072\u3073\u5272\u308c\u3084\u7834\u640d\u304c\u8d77\u3053\u308a\u3084\u3059\u304f\u306a\u308b\u3002<\/p>\n<\/div>\n<div class=\"claim claim-false\" style=\"background-color: #f7e8e8; border-color: #f7e8e8; color: #8a4a4a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#dc2626\" stroke-width=\"2\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"\/><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"\/><\/svg><b>\u201cInjection-molded materials are unaffected by environmental factors.\u201d<\/b><span class=\"claim-true-or-false\">\u507d<\/span><\/p>\n<p class=\"claim-explanation\">\u74b0\u5883\u6761\u4ef6\u306f\u6750\u6599\u306e\u6027\u80fd\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u3001\u305d\u308c\u3092\u8003\u616e\u3057\u306a\u3044\u3068\u3001\u3055\u307e\u3056\u307e\u306a\u7528\u9014\u3067\u88fd\u54c1\u306e\u4e0d\u5177\u5408\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/p>\n<\/div>\n<h2>\u5fdc\u529b\u96c6\u4e2d\u56e0\u5b50\u306f\u5c04\u51fa\u6210\u5f62\u54c1\u306e\u8106\u3055\u306b\u3069\u3046\u5f71\u97ff\u3059\u308b\u304b\uff1f<\/h2>\n<p><strong>Stress concentration is a local geometry or loading problem that makes cracks start early.<\/strong> Thin walls, sharp corners, weak weld lines, and assembly loads should be corrected with radius transitions, uniform wall thickness, and validation testing.<\/p>\n<p>\u5c04\u51fa\u6210\u5f62\u54c1\u306e\u5fdc\u529b\u96c6\u4e2d\u8981\u56e0\u306f\u3001\u5c40\u6240\u7684\u306a\u5fdc\u529b\u3092\u5f15\u304d\u8d77\u3053\u3057\u3001\u4e80\u88c2\u3084\u8106\u6027\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u8981\u56e0\u306f\u3001\u6750\u6599\u7279\u6027\u3001\u8a2d\u8a08\u3001\u6210\u5f62\u6761\u4ef6\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u92ed\u89d2\u90e8\u3092\u6e1b\u3089\u3057\u3001\u8a2d\u8a08\u3092\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u88fd\u54c1\u306e\u5f37\u5ea6\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u4e0d\u5408\u7406\u306a\u69cb\u9020\u8a2d\u8a08<\/h3>\n<p>\u88fd\u54c1\u8a2d\u8a08\u306b\u304a\u3051\u308b\u8584\u8089\u3084\u92ed\u89d2\u306f\u3001\u5c40\u90e8\u7684\u306a\u5fdc\u529b\u96c6\u4e2d\u3092\u5f15\u304d\u8d77\u3053\u3057\u3084\u3059\u304f\u3001\u8106\u6027\u3092\u5897\u5927\u3055\u305b\u308b\u3002\u5fdc\u529b\u96c6\u4e2d\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u3001\u9069\u5ea6\u306a\u89d2\u306e\u4e38\u307f\u3084\u5747\u4e00\u306a\u8089\u539a\u3092\u63a1\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6709\u9650\u8981\u7d20\u89e3\u6790\u3084\u305d\u306e\u4ed6\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u652f\u63f4\u8a2d\u8a08\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30c4\u30fc\u30eb\u306f\u3001\u8a2d\u8a08\u4e2d\u306b\u5fdc\u529b\u3092\u8a55\u4fa1\u3057\u3001\u88fd\u54c1\u69cb\u9020\u3092\u4fee\u6b63\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u7d44\u307f\u7acb\u3066\u6642\u304a\u3088\u3073\u4f7f\u7528\u6642\u306e\u30b9\u30c8\u30ec\u30b9<\/h3>\n<p>\u7d44\u307f\u7acb\u3066\u6642\u3084\u4f7f\u7528\u4e2d\u306b\u5916\u529b\u304c\u52a0\u308f\u308b\u3068\u3001\u5fdc\u529b\u304c\u96c6\u4e2d\u3057\u3001\u7279\u306b\u52d5\u7684\u306a\u8ca0\u8377\u304c\u304b\u304b\u308b\u5834\u5408\u306b\u306f\u3001\u5fdc\u529b\u304c\u96c6\u4e2d\u3057\u305f\u90e8\u5206\u306b\u4e80\u88c2\u304c\u751f\u3058\u3084\u3059\u304f\u306a\u308b\u305f\u3081\u3001\u8106\u3044\u6750\u6599\u304c\u4f5c\u3089\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u5fdc\u529b\u96c6\u4e2d\u3092\u7de9\u548c\u3057\u3001\u8106\u6027\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u9069\u5207\u306a\u7d44\u307f\u7acb\u3066\u65b9\u6cd5\u3092\u7528\u3044\u308b\u3068\u3068\u3082\u306b\u3001\u9069\u5207\u306a\u7de9\u885d\u63aa\u7f6e\u3092\u8b1b\u3058\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n<h3>\u5185\u90e8\u30b9\u30c8\u30ec\u30b9<\/h3>\n<p>\u5c04\u51fa\u6210\u5f62\u6642\u306e\u4e0d\u5747\u4e00\u306a\u51b7\u5374\u3084\u4e0d\u9069\u5207\u306a\u52a0\u5de5\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306b\u3088\u308a\u3001\u88fd\u54c1\u5185\u306b\u5185\u90e8\u5fdc\u529b\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u5185\u90e8\u5fdc\u529b\u306f\u88fd\u54c1\u306b\u529b\u304c\u52a0\u308f\u308b\u3068\u8106\u304f\u306a\u308a\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u30a2\u30cb\u30fc\u30eb\u51e6\u7406\u306f\u3001\u5185\u90e8\u5fdc\u529b\u3092\u52b9\u679c\u7684\u306b\u9664\u53bb\u3057\u3001\u6a5f\u68b0\u7684\u7279\u6027\u3092\u6539\u5584\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"claim claim-true\" style=\"background-color: #eff7ef; border-color: #eff7ef; color: #5a8a5a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#16a34a\" stroke-width=\"2\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><b>\u201cStress concentration factors lead to increased brittleness in injection molded products.\u201d<\/b><span class=\"claim-true-or-false\">\u771f<\/span><\/p>\n<p class=\"claim-explanation\">\u92ed\u89d2\u306a\u30b3\u30fc\u30ca\u30fc\u3084\u4e0d\u9069\u5207\u306a\u6750\u6599\u914d\u5206\u306a\u3069\u306e\u8981\u56e0\u306b\u3088\u3063\u3066\u5f15\u304d\u8d77\u3053\u3055\u308c\u308b\u5c40\u6240\u7684\u306a\u5fdc\u529b\u306f\u3001\u6210\u5f62\u90e8\u54c1\u306e\u4e80\u88c2\u3084\u8106\u6027\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n<div class=\"claim claim-false\" style=\"background-color: #f7e8e8; border-color: #f7e8e8; color: #8a4a4a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#dc2626\" stroke-width=\"2\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"\/><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"\/><\/svg><b>\u201cStress concentration factors always cause brittleness in injection molded products.\u201d<\/b><span class=\"claim-true-or-false\">\u507d<\/span><\/p>\n<p class=\"claim-explanation\">\u5fdc\u529b\u96c6\u4e2d\u56e0\u5b50\u306f\u8106\u6027\u306e\u30ea\u30b9\u30af\u3092\u9ad8\u3081\u308b\u304c\u3001\u6750\u6599\u5f37\u5ea6\u3084\u8a2d\u8a08\u306e\u6700\u9069\u5316\u306b\u3088\u3063\u3066\u306f\u3001\u5e38\u306b\u7834\u640d\u306b\u3064\u306a\u304c\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3002<\/p>\n<\/div>\n<h2>\u5c04\u51fa\u6210\u5f62\u90e8\u54c1\u306e\u8106\u6027\u9632\u6b62\u306b\u691c\u67fb\u3068\u54c1\u8cea\u7ba1\u7406\u304c\u679c\u305f\u3059\u5f79\u5272\u3068\u306f\uff1f<\/h2>\n<p><strong>Inspection and quality control are the safeguards that catch brittle-part risk before shipment.<\/strong> Based on more than 20 years of tooling and injection molding work, our team combines material testing, process-window records, first-article inspection, and functional validation.<\/p>\n<p>\u52b9\u679c\u7684\u306a\u691c\u67fb\u3068\u54c1\u8cea\u7ba1\u7406\u30d7\u30ed\u30bb\u30b9\u306b\u3088\u308a\u3001\u6750\u6599\u306e\u6d41\u308c\u4e0d\u826f\u3001\u4e0d\u9069\u5207\u306a\u51b7\u5374\u3001\u5fdc\u529b\u306a\u3069\u3001\u8106\u6027\u306b\u3064\u306a\u304c\u308b\u6b20\u9665\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5fb9\u5e95\u3057\u305f\u691c\u67fb\u3092\u5b9f\u65bd\u3059\u308b\u3053\u3068\u3067\u3001\u30e1\u30fc\u30ab\u30fc\u306f\u3053\u308c\u3089\u306e\u554f\u984c\u306e\u30ea\u30b9\u30af\u3092\u4f4e\u6e1b\u3057\u3001\u90e8\u54c1\u5168\u4f53\u306e\u5f37\u5ea6\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u30aa\u30f3\u30e9\u30a4\u30f3\u691c\u51fa<\/h3>\n<p>\u5c04\u51fa\u6210\u5f62\u306e\u751f\u7523\u4e2d\u306b\u3001X\u7dda\u691c\u67fb\u3084\u8d85\u97f3\u6ce2\u691c\u67fb\u306a\u3069\u306e\u30aa\u30f3\u30e9\u30a4\u30f3\u691c\u51fa\u6280\u8853\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u88fd\u54c1\u306e\u54c1\u8cea\u3092\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u6539\u5584\u3057\u3001\u6f5c\u5728\u7684\u306a\u8106\u6027\u306e\u539f\u56e0\u3092\u691c\u51fa\u3057\u3066\u4fee\u6b63\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3001\u30aa\u30f3\u30e9\u30a4\u30f3\u691c\u51fa\u6280\u8853\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u88fd\u54c1\u306e\u6b69\u7559\u307e\u308a\u3068\u751f\u7523\u52b9\u7387\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n<h3>\u6750\u6599\u5206\u6790<\/h3>\n<p>\u5165\u8377\u3057\u305f\u539f\u6750\u6599\u306e\u5834\u5408\u3001\u5f15\u5f35\u5f37\u5ea6\u3068\u885d\u6483\u5f37\u5ea6\u306e\u54c1\u8cea\u304c\u751f\u7523\u57fa\u6e96\u306b\u9069\u5408\u3059\u308b\u3088\u3046\u3001\u53b3\u683c\u306a\u691c\u67fb\u304c\u5b9f\u65bd\u3055\u308c\u308b\u3002\u6750\u6599\u5206\u6790\u306b\u3088\u308a\u3001\u52a0\u5de5\u524d\u306b\u6750\u6599\u306b\u5f31\u70b9\u304c\u306a\u3044\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u751f\u7523\u4e2d\u306b\u6750\u6599\u304c\u8106\u304f\u306a\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h3>\u88fd\u54c1\u30c6\u30b9\u30c8<\/h3>\n<p>\u30a8\u30fc\u30b8\u30f3\u30b0\u8a66\u9a13\u3084\u8010\u5bd2\u8a66\u9a13\u306a\u3069\u3001\u5b9f\u969b\u306e\u4f7f\u7528\u306b\u8fd1\u3044\u8a66\u9a13\u6761\u4ef6\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u88fd\u54c1\u306e\u8106\u6027\u554f\u984c\u3092\u65e9\u671f\u306b\u767a\u898b\u3057\u3001\u305d\u308c\u306b\u5bfe\u5fdc\u3057\u305f\u6539\u826f\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u88fd\u54c1\u8a66\u9a13\u306f\u3001\u88fd\u54c1\u304c\u672c\u6765\u306e\u7528\u9014\u3067\u5b89\u5168\u304b\u3064\u52b9\u7387\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u54c1\u8cea\u4fdd\u8a3c\u306e\u4e00\u74b0\u3067\u3042\u308b\u3002<\/p>\n<h3>\u30d7\u30ed\u30bb\u30b9\u30fb\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/h3>\n<p>\u30d7\u30ed\u30bb\u30b9\u30fb\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u751f\u7523\u3055\u308c\u308b\u524d\u306e\u30d7\u30ed\u30bb\u30b9\u304c\u3001\u751f\u7523\u306b\u4f7f\u7528\u3055\u308c\u308b\u524d\u306b\u5fc5\u8981\u3068\u3055\u308c\u308b\u3060\u3051\u306e\u5b89\u5b9a\u6027\u3068\u4fe1\u983c\u6027\u304c\u3042\u308b\u3053\u3068\u3092\u78ba\u7acb\u3059\u308b\u306e\u306b\u5f79\u7acb\u3064\u3002\u30d7\u30ed\u30bb\u30b9\u30fb\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u3001\u5c11\u91cf\u8a66\u4f5c\u306e\u30d1\u30bf\u30fc\u30f3\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306e\u6700\u9069\u5316\u306a\u3069\u3002\u304a\u3088\u3073\u6027\u80fd\u8a66\u9a13\u306f\u3001\u751f\u7523\u4e2d\u306e\u8106\u6027\u3092\u5236\u5fa1\u3059\u308b\u4e0a\u3067\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<div class=\"claim claim-true\" style=\"background-color: #eff7ef; border-color: #eff7ef; color: #5a8a5a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#16a34a\" stroke-width=\"2\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><b>\u201cInspection and quality control reduce brittleness in injection molded parts.\u201d<\/b><span class=\"claim-true-or-false\">\u771f<\/span><\/p>\n<p class=\"claim-explanation\">\u5165\u5ff5\u306a\u691c\u67fb\u306b\u3088\u3063\u3066\u3001\u30a8\u30a2\u30dd\u30b1\u30c3\u30c8\u3084\u4e0d\u9069\u5207\u306a\u786c\u5316\u306a\u3069\u3001\u8106\u6027\u306b\u3064\u306a\u304c\u308b\u6b20\u9665\u3092\u7279\u5b9a\u3057\u3001\u90e8\u54c1\u3092\u4f7f\u7528\u3059\u308b\u524d\u306b\u4fee\u6b63\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<\/div>\n<div class=\"claim claim-false\" style=\"background-color: #f7e8e8; border-color: #f7e8e8; color: #8a4a4a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#dc2626\" stroke-width=\"2\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"\/><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"\/><\/svg><b>\u201cQuality control is always sufficient to prevent brittleness in injection molded parts.\u201d<\/b><span class=\"claim-true-or-false\">\u507d<\/span><\/p>\n<p class=\"claim-explanation\">\u54c1\u8cea\u7ba1\u7406\u306f\u8106\u6027\u3092\u5927\u5e45\u306b\u4f4e\u6e1b\u3055\u305b\u308b\u304c\u3001\u6750\u6599\u306e\u9078\u629e\u3084\u91d1\u578b\u8a2d\u8a08\u3068\u3044\u3063\u305f\u4ed6\u306e\u8981\u56e0\u3082\u3001\u90e8\u54c1\u306e\u4e0d\u5177\u5408\u3092\u9632\u3050\u4e0a\u3067\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3059\u3002<\/p>\n<\/div>\n<h2>\u5c04\u51fa\u6210\u5f62\u54c1\u306e\u8106\u3055\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u306e\u4e00\u822c\u7684\u306a\u89e3\u6c7a\u7b56\u3068\u306f\uff1f<\/h2>\n<p>Some common solutions to address brittleness in injection-molded products are the main categories or options explained in this section. Brittleness in injection-molded products can be addressed through various techniques like optimizing material selection, adjusting processing conditions, and adding reinforcements to improve durability and toughness.<\/p>\n<p>\u8106\u3055\u3092\u6e1b\u3089\u3059\u4e00\u822c\u7684\u306a\u89e3\u6c7a\u7b56\u306b\u306f\u3001\u8010\u885d\u6483\u6027\u30dd\u30ea\u30de\u30fc\u306e\u4f7f\u7528\u3001\u91d1\u578b\u6e29\u5ea6\u306e\u5909\u66f4\u3001\u51b7\u5374\u901f\u5ea6\u306e\u8abf\u6574\u3001\u6750\u6599\u306e\u67d4\u8edf\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306e\u5145\u586b\u5264\u3084\u53ef\u5851\u5264\u306e\u6dfb\u52a0\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u65b9\u6cd5\u306f\u3001\u88fd\u54c1\u306e\u5f3e\u529b\u6027\u3092\u5411\u4e0a\u3055\u305b\u3001\u7834\u640d\u306e\u30ea\u30b9\u30af\u3092\u6e1b\u3089\u3059\u306e\u306b\u5f79\u7acb\u3064\u3002<\/p>\n<h3>\u6750\u6599\u9078\u629e\u306e\u6700\u9069\u5316<\/h3>\n<figure style=\"text-align:center;margin:2em 0;\">\n<img decoding=\"async\" width=\"800\" height=\"457\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/04\/blue-plastic-injection-molded-part-800x457-1.jpg\" alt=\"Blue injection molded part showing geometry that can concentrate stress\" class=\"wp-image-53341 size-full\" style=\"max-width:100%;height:auto;\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/04\/blue-plastic-injection-molded-part-800x457-1.jpg 800w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/04\/blue-plastic-injection-molded-part-800x457-1-300x171.jpg 300w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/04\/blue-plastic-injection-molded-part-800x457-1-768x439.jpg 768w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/04\/blue-plastic-injection-molded-part-800x457-1-18x10.jpg 18w, https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/04\/blue-plastic-injection-molded-part-800x457-1-600x343.jpg 600w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption style=\"font-size:0.78em; color:#888; font-style:italic; margin-top:4px; text-align:center;\">Molded Part<\/figcaption><\/figure>\n<p>\u6700\u7d42\u7528\u9014\u3068\u8981\u6c42\u6027\u80fd\u306b\u5fdc\u3058\u3066\u3001\u9069\u5207\u306a\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u306e\u7a2e\u985e\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u9ad8\u3044\u976d\u6027\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001\u30dd\u30ea\u30a8\u30c1\u30ec\u30f3\uff08PE\uff09\u3084\u30dd\u30ea\u30d7\u30ed\u30d4\u30ec\u30f3\uff08PP\uff09\u306a\u3069\u3001\u3088\u308a\u512a\u308c\u305f\u7d20\u6750\u3092\u9078\u3076\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u8010\u9ad8\u6e29\u6027\u3084\u8010\u85ac\u54c1\u8150\u98df\u6027\u304c\u8981\u6c42\u3055\u308c\u308b\u5834\u5408\u306f\u3001\u30dd\u30ea\u30a2\u30df\u30c9\uff08PA\uff09\u3084\u30dd\u30ea\u30a8\u30b9\u30c6\u30eb\uff08PET\uff09\u306a\u3069\u306e\u7d20\u6750\u3092\u9078\u3076\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u91d1\u578b\u8a2d\u8a08\u306e\u6539\u5584<\/h3>\n<p>\u5747\u4e00\u306a\u30e1\u30eb\u30c8\u30d5\u30ed\u30fc\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u3001\u30e9\u30f3\u30ca\u30fc\u3068\u30b2\u30fc\u30c8\u3092\u8a2d\u8a08\u3059\u308b\u3002\u91d1\u578b\u6e29\u5ea6\u304c\u6975\u7aef\u306a\u30ec\u30d9\u30eb\u306b\u9054\u3057\u306a\u3044\u3088\u3046\u306b\u5236\u5fa1\u3059\u308b\u3002\u5fdc\u529b\u96c6\u4e2d\u3092\u6291\u3048\u308b\u624b\u6bb5\u3068\u3057\u3066\u3001\u8907\u6570\u306e\u30b2\u30fc\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3092\u63a8\u5968\u3059\u308b\u3002\u30b9\u30e0\u30fc\u30ba\u306a\u7a7a\u6c17\u6392\u51fa\u3092\u78ba\u4fdd\u3057\u3001\u30dc\u30a4\u30c9\u3084\u5fdc\u529b\u96c6\u4e2d\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u30d9\u30f3\u30c8\u8a2d\u8a08\u3092\u6700\u9069\u5316\u3059\u308b\u3002<\/p>\n<h3>\u51e6\u7406\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u8abf\u6574<\/h3>\n<p>Control the injection speed and pressure within a reasonable range to make the melt fill the mold cavity evenly and reduce internal stress. Change the melt temperature according to material properties to prevent material damage. Other process parameters such as holding pressure and cooling time should also be set to make the product material density evenly distributed and reduce the impact of residual stress.<\/p>\n<h3>\u751f\u7523\u74b0\u5883\u306e\u6539\u5584<\/h3>\n<p>\u751f\u7523\u74b0\u5883\u306e\u6e7f\u5ea6\u3068\u6e29\u5ea6\u3092\u7ba1\u7406\u3059\u308b\u3002\u3053\u308c\u306f\u6750\u6599\u306e\u542b\u6c34\u7387\u306b\u5f71\u97ff\u3059\u308b\u304b\u3089\u3067\u3042\u308b\u3002\u30c7\u30ea\u30b1\u30fc\u30c8\u306a\u3082\u306e\u306b\u306f\u9664\u6e7f\u88c5\u7f6e\u3092\u4f7f\u7528\u3059\u308b\u3002\u5316\u5b66\u7684\u74b0\u5883\u306b\u3088\u308b\u6750\u6599\u306e\u8150\u98df\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u9069\u5207\u306a\u5316\u5b66\u7684\u4fdd\u8b77\u63aa\u7f6e\u3092\u3068\u308b\u3002<\/p>\n<h3>\u5408\u7406\u7684\u306a\u69cb\u9020\u8a2d\u8a08<\/h3>\n<p>\u8a2d\u8a08\u306b\u304a\u3044\u3066\u306f\u3001\u8584\u3044\u58c1\u3084\u92ed\u89d2\u306e\u30b3\u30fc\u30ca\u30fc\u3092\u8a2d\u3051\u308b\u3079\u304d\u3067\u306f\u306a\u304f\u3001\u7de9\u3084\u304b\u306a\u5909\u5316\u3068\u5747\u7b49\u306a\u539a\u3055\u306e\u58c1\u304c\u6700\u9069\u3067\u3042\u308b\u3002\u5fdc\u529b\u96c6\u4e2d\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u7d44\u307f\u7acb\u3066\u6642\u3084\u4f7f\u7528\u6642\u306b\u90e8\u54c1\u306e\u5fdc\u529b\u3092\u5747\u7b49\u306b\u5206\u6563\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u6709\u9650\u8981\u7d20\u89e3\u6790\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3092\u6d3b\u7528\u3057\u3066\u3001\u7279\u5b9a\u306e\u88fd\u54c1\u306e\u69cb\u9020\u306b\u95a2\u3057\u3066\u6539\u5584\u3059\u3079\u304d\u70b9\u3092\u7279\u5b9a\u3059\u308b\u3002<\/p>\n<h3>\u691c\u51fa\u3068\u54c1\u8cea\u7ba1\u7406\u306e\u5f37\u5316<\/h3>\n<p>\u30aa\u30f3\u30e9\u30a4\u30f3\u691c\u51fa\u6280\u8853\u3092\u4f7f\u7528\u3057\u3066\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u88fd\u54c1\u306e\u54c1\u8cea\u3092\u76e3\u8996\u3057\u307e\u3059\u3002\u539f\u6750\u6599\u3092\u53b3\u683c\u306b\u691c\u67fb\u3057\u3001\u751f\u7523\u8981\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002\u5b9f\u969b\u306e\u4f7f\u7528\u74b0\u5883\u3092\u6a21\u64ec\u3057\u305f\u8a66\u9a13\u3092\u884c\u3044\u3001\u8106\u6027\u554f\u984c\u3092\u65e9\u671f\u306b\u767a\u898b\u3057\u3001\u6539\u5584\u3059\u308b\u3002\u65b0\u5de5\u7a0b\u3084\u65b0\u7d20\u6750\u306e\u5de5\u7a0b\u691c\u8a3c\u3092\u5fb9\u5e95\u7684\u306b\u884c\u3044\u3001\u5b89\u5b9a\u6027\u3068\u4fe1\u983c\u6027\u3092\u898b\u6975\u3081\u308b\u3002<\/p>\n<div class=\"claim claim-true\" style=\"background-color: #eff7ef; border-color: #eff7ef; color: #5a8a5a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#16a34a\" stroke-width=\"2\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><b>\u201cUsing impact-resistant materials reduces brittleness in injection-molded products.\u201d<\/b><span class=\"claim-true-or-false\">\u771f<\/span><\/p>\n<p class=\"claim-explanation\">PC\/ABS\u30d6\u30ec\u30f3\u30c9\u3084\u30dd\u30ea\u30ab\u30fc\u30dc\u30cd\u30fc\u30c8\u306a\u3069\u306e\u7d20\u6750\u306f\u8010\u885d\u6483\u6027\u304c\u9ad8\u304f\u3001\u6210\u5f62\u90e8\u54c1\u306e\u5f37\u976d\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3002<\/p>\n<\/div>\n<div class=\"claim claim-false\" style=\"background-color: #f7e8e8; border-color: #f7e8e8; color: #8a4a4a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#dc2626\" stroke-width=\"2\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"\/><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"\/><\/svg><b>\u201cSlower cooling rates always prevent brittleness in injection-molded parts.\u201d<\/b><span class=\"claim-true-or-false\">\u507d<\/span><\/p>\n<p class=\"claim-explanation\">\u51b7\u5374\u3092\u9045\u304f\u3059\u308c\u3070\u5185\u90e8\u5fdc\u529b\u3092\u4f4e\u6e1b\u3067\u304d\u308b\u304c\u3001\u51b7\u5374\u304c\u9045\u3059\u304e\u308b\u3068\u30b5\u30a4\u30af\u30eb\u6642\u9593\u304c\u9577\u304f\u306a\u308a\u3001\u53cd\u308a\u304c\u751f\u3058\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002<\/p>\n<\/div>\n<h2>How Can Manufacturers Effectively Overcome Brittleness in Injection Molded Parts?<\/h2>\n<p>A system-level fix is the safest way to overcome brittleness in injection molded parts. The action plan should connect resin selection, mold design, drying, melt temperature, pressure control, cooling balance, and final inspection.<\/p>\n<p>Injection molding is a complex process that demands comprehensive consideration of all contributing factors. By implementing the solutions outlined above\u2014from scientific material selection to advanced online detection\u2014production teams can systematically eliminate brittleness problems and deliver consistently high-quality products.<\/p>\n<p>For a comprehensive overview of best practices across the entire injection molding process, see our <a href=\"https:\/\/zetarmold.com\/ja\/injection-molding-complete-guide\/\">Injection Molding Complete Guide<\/a>. If you need expert support for your next project, ZetarMold\u2019s engineering team provides DFM feedback, material recommendations, and competitive quoting.<\/p>\n<p>For a comprehensive overview of best practices across the entire injection molding process, see our <a href=\"https:\/\/zetarmold.com\/ja\/injection-molding-complete-guide\/\">Injection Molding Complete Guide<\/a>[3]. If you need expert support for your next project, ZetarMold engineering team provides DFM feedback, material recommendations, and competitive quoting.<\/p>\n<h2>\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n<h3>What is the main cause of brittleness in injection molded parts?<\/h3>\n<p>\u9752\u3044\u5c04\u51fa\u6210\u5f62\u90e8\u54c1\u306f\u3001\u5fdc\u529b\u3092\u96c6\u4e2d\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u5e7e\u4f55\u5b66\u7684\u5f62\u72b6\u3092\u793a\u3057\u3066\u3044\u307e\u3059<\/p>\n<h3>How does mold design affect the brittleness of injection molded parts?<\/h3>\n<p>Mold design affects brittleness because it controls how plastic fills, packs, cools, and releases from the tool. Poor gate placement can create weld lines, shear stress, or uneven flow length. Unbalanced runners may leave one cavity overpacked while another is weak. Inadequate venting can trap gas and create burn marks or weak zones. Cooling channels that remove heat unevenly can lock internal stress into the part. A good mold design reduces these risks by balancing flow, venting air, and stabilizing cooling.<\/p>\n<h3>Can recycled materials cause brittleness in injection molding?<\/h3>\n<p>Yes, recycled material can cause brittleness when the ratio is too high or when the recycled stream is not controlled. Each heat history can shorten polymer chains, reduce impact strength, and introduce contamination or colorant variation. Regrind can still be useful for noncritical parts, but it needs a defined blend ratio, drying control, and mechanical testing. For structural, safety, or appearance-critical parts, the safer approach is to limit recycled content and validate toughness with actual production samples before approving mass production.<\/p>\n<h3>How can environmental factors be managed to prevent brittleness?<\/h3>\n<p>Environmental factors should be managed by matching the resin to the real service environment and then controlling storage, drying, and production conditions. Hygroscopic materials such as nylon need moisture control before molding, because absorbed water can change mechanical properties. Parts used in cold, hot, chemical, or outdoor environments need material selection and testing based on those conditions. Aging, cold impact, humidity, and chemical exposure tests help confirm that the molded part will not become brittle after shipment or daily use.<\/p>\n<h3>What quality control measures help prevent brittle injection molded parts?<\/h3>\n<p>Useful quality control measures include incoming resin inspection, moisture checks, melt temperature records, process window validation, first-article inspection, and impact or tensile testing where toughness is critical. In-process monitoring can catch abnormal pressure, speed, or temperature changes before they create brittle batches. Final inspection should look for cracks, stress whitening, weak weld lines, and dimensional distortion. The strongest prevention method is to connect material testing, DFM review, molding parameters, and production inspection into one controlled validation plan before shipment approval.<\/p>\n<hr style=\"margin:2em 0;border:none;border-top:1px solid #e0e0e0;\" \/>\n<ol class=\"footnotes\">\n<li id=\"fn:1\">\n<p><strong>injection mold design:<\/strong> injection mold design refers to the tooling decisions that define gate placement, cooling behavior, ejection, venting, wall thickness, and other factors that influence brittleness. <a href=\"#fnref1:1\" class=\"footnote-backref\">\u21a9<\/a><\/p>\n<\/li>\n<li id=\"fn:2\">\n<p><strong>injection molding:<\/strong> injection molding refers to the production process that melts plastic, injects it into a mold cavity, cools the part, and repeats the cycle for stable volume manufacturing. <a href=\"#fnref1:2\" class=\"footnote-backref\">\u21a9<\/a><\/p>\n<\/li>\n<li id=\"fn:3\">\n<p><strong>ABS injection molding:<\/strong> ABS injection molding refers to molding acrylonitrile butadiene styrene resin where grade choice, drying, melt temperature, and mold design affect toughness. <a href=\"#fnref1:3\" class=\"footnote-backref\">\u21a9<\/a><\/p>\n<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"<p>\u5c04\u51fa\u6210\u5f62\u90e8\u54c1\u306e\u8106\u3055\u306f\u6027\u80fd\u4f4e\u4e0b\u3084\u7834\u640d\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u6839\u672c\u539f\u56e0\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u306f\u3001\u90e8\u54c1\u306e\u8010\u4e45\u6027\u3068\u751f\u7523\u52b9\u7387\u3092\u5411\u4e0a\u3055\u305b\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u5c04\u51fa\u6210\u5f62\u90e8\u54c1\u306e\u8106\u3055\u306f\u3001\u4e0d\u9069\u5207\u306a\u6750\u6599\u9078\u629e\u3001\u8aa4\u3063\u305f\u52a0\u5de5\u6761\u4ef6\u3001\u307e\u305f\u306f\u4e0d\u826f\u306a\u5c04\u51fa\u6210\u5f62\u91d1\u578b\u8a2d\u8a08\u306a\u3069\u306e\u554f\u984c\u306b\u8d77\u56e0\u3059\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059[1]\u3002\u89e3\u6c7a\u7b56\u306b\u306f\u3001\u6210\u5f62\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u8abf\u6574\u3001\u8010\u885d\u6483\u6027\u6750\u6599\u306e\u4f7f\u7528\u3001\u51b7\u5374\u901f\u5ea6\u306e\u6539\u5584\u306a\u3069\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u8106\u3055\u306b\u5bfe\u51e6\u3059\u308b\u306b\u306f\u3001\u6750\u6599\u7279\u6027\u3068\u30d7\u30ed\u30bb\u30b9\u5236\u5fa1\u3092\u5fb9\u5e95\u7684\u306b\u691c\u8a0e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u90e8\u54c1\u306e\u5f37\u5ea6\u3068\u6027\u80fd\u3092\u9ad8\u3081\u308b\u305f\u3081\u306e\u6210\u5f62\u6761\u4ef6\u3068\u6750\u6599\u9078\u629e\u306e\u6700\u9069\u5316\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u5b66\u3073\u307e\u3057\u3087\u3046\u3002\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8 \u8106\u3055\u306f\u901a\u5e38\u3001\u5358\u4e00\u306e\u5b64\u7acb\u3057\u305f\u5909\u6570\u3067\u306f\u306a\u304f\u3001\u6750\u6599\u3001\u91d1\u578b\u3001\u30d7\u30ed\u30bb\u30b9\u3001\u4f7f\u7528\u74b0\u5883\u306e\u8907\u5408\u7684\u306a\u4e0d\u5177\u5408\u304b\u3089\u751f\u3058\u307e\u3059\u3002\u6700\u901f\u306e\u4fee\u6b63\u65b9\u6cd5 [\u2026]<\/p>","protected":false},"author":1,"featured_media":48889,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Optimize Material Choice to Reduce Brittleness in Molding","_seopress_titles_desc":"Discover how material choice and mold design affect brittleness in injection molded parts. 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