{"id":14699,"date":"2022-12-15T10:00:00","date_gmt":"2022-12-15T02:00:00","guid":{"rendered":"https:\/\/zetarmold.com\/?p=14699"},"modified":"2026-04-09T08:27:32","modified_gmt":"2026-04-09T00:27:32","slug":"moldagem-por-injecao-de-marcas-de-pia","status":"publish","type":"post","link":"https:\/\/zetarmold.com\/pt\/moldagem-por-injecao-de-marcas-de-pia\/","title":{"rendered":"Como evitar marcas de afundamento na moldagem por inje\u00e7\u00e3o?"},"content":{"rendered":"<p><strong>One of the potential drawbacks of the <a href=\"https:\/\/zetarmold.com\/pt\/injection-mold-complete-guide\/\">molde de inje\u00e7\u00e3o<\/a>ing process is a defect known as a sink mark, in which the surface of the finished product appears sunken or concave due to uneven cooling or shrinkage of the material.&nbsp;<\/strong><\/p>\n<p>In this article, we will discuss some strategies for avoiding sink marks in plastic injection molding.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\">\n<div class=\"wp-block-embed__wrapper\">\n<iframe  id=\"_ytid_48524\"  width=\"800\" height=\"450\"  data-origwidth=\"800\" data-origheight=\"450\"  data-relstop=\"1\" src=\"https:\/\/www.youtube.com\/embed\/GJGstdlFhW8?enablejsapi=1&#038;autoplay=0&#038;cc_load_policy=0&#038;cc_lang_pref=&#038;iv_load_policy=1&#038;loop=0&#038;modestbranding=0&#038;rel=0&#038;fs=1&#038;playsinline=0&#038;autohide=2&#038;theme=dark&#038;color=red&#038;controls=1&#038;\" class=\"__youtube_prefs__  epyt-is-override  no-lazyload\" title=\"Leitor do YouTube\"  allow=\"fullscreen; accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen data-no-lazy=\"1\" data-skipgform_ajax_framebjll=\"\"><\/iframe>\n<\/div>\n<\/figure>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">1. Qual \u00e9 a marca de afundamento na moldagem por inje\u00e7\u00e3o\uff1f<\/span><\/h2>\n<p>Sink marks are common injection molding defects, in which the surface of the finished product sinks or caves in, creating an indentation or depression.&nbsp;<\/p>\n<h2 class=\"wp-block-heading\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">2. O que causa marcas de afundamento na moldagem por inje\u00e7\u00e3o\uff1f<\/span><\/h2>\n<p>As marcas de afundamento podem ser causadas por v\u00e1rios factores, incluindo\uff1a<\/p>\n<p>a. Impr\u00f3prio <a rel=\"noreferrer noopener\" href=\"https:\/\/zetarmold.com\/pt\/\" data-type=\"URL\" data-id=\"https:\/\/zetarmold.com\/\" target=\"_blank\">molde de inje\u00e7\u00e3o<\/a> conce\u00e7\u00e3o.<\/p>\n<p>b. Arrefecimento inadequado do material fundido.<\/p>\n<p>c. Fluxo de materiais inadequado.&nbsp;<\/p>\n<p>d. A presen\u00e7a de bolhas de ar no material fundido.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-2 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2022\/12\/sink-marks-injection-molding-1.jpg\" alt=\"\" class=\"wp-image-14721\" height=\"400\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2022\/12\/sink-marks-injection-molding-1.jpg 564w, https:\/\/zetarmold.com\/wp-content\/uploads\/2022\/12\/sink-marks-injection-molding-1-300x268.jpg 300w\" sizes=\"(max-width: 564px) 100vw, 564px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">3. Como evitar marcas de afundamento de design de molde impr\u00f3prio\uff1f<\/span><\/h2>\n<p>One of the key factors that can contribute to sinking marks is the design of the injection mold.&nbsp;The design of the mold plays a critical role in the overall quality of the finished product, and a poorly designed mold can result in defects such as sink marks.&nbsp;<\/p>\n<p>To reduce sink marks, the injection mold should be designed with adequate wall thickness and gate sizes, as well as proper venting to allow air to escape from the mold.&nbsp;<\/p>\n<p>Al\u00e9m disso, a conce\u00e7\u00e3o do molde deve ter em conta o encolhimento do material \u00e0 medida que arrefece, para garantir que o produto acabado tem as dimens\u00f5es corretas.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-3 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"564\" height=\"373\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2022\/12\/sink-marks-injection-molding.jpg\" alt=\"\" class=\"wp-image-14726\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2022\/12\/sink-marks-injection-molding.jpg 564w, https:\/\/zetarmold.com\/wp-content\/uploads\/2022\/12\/sink-marks-injection-molding-300x198.jpg 300w\" sizes=\"(max-width: 564px) 100vw, 564px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">4. Como evitar a marca de afundamento do arrefecimento inadequado do material fundido\uff1f<\/span><\/h2>\n<p>During injection molding, it is essential to properly cool the molten material to solidify it into the desired shape and avoid sink marks. <\/p>\n<p>Para alcan\u00e7ar este resultado, devem ser implementados canais de arrefecimento adequados com controlos de temperatura regulados de um meio adequado durante o processo. Caso contr\u00e1rio, a qualidade geral do produto pode ser afetada de forma negativa.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-4 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"423\" height=\"317\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2022\/12\/sink-marks-injection-molding-4-edited-1.jpg\" alt=\"\" class=\"wp-image-14734\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2022\/12\/sink-marks-injection-molding-4-edited-1.jpg 423w, https:\/\/zetarmold.com\/wp-content\/uploads\/2022\/12\/sink-marks-injection-molding-4-edited-1-300x225.jpg 300w\" sizes=\"(max-width: 423px) 100vw, 423px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">5. Como evitar marcas de afundamento de fluxo de material inadequado\uff1f<\/span><\/h2>\n<p>The formation of sink marks in injection molds can be prevented through the careful control and monitoring of material temperature, as well as designing a mold that accounts for the flow characteristics of the material. <\/p>\n<p>A utiliza\u00e7\u00e3o de ferramentas especializadas, como medidores de caudal, para medir e manter uma taxa \u00f3ptima \u00e9 essencial quando se procura atingir este objetivo. Com estes passos implementados, ter\u00e1 a tranquilidade de saber que o seu produto ficar\u00e1 livre de imperfei\u00e7\u00f5es causadas por marcas de afundamento!<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-5 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"501\" height=\"376\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2022\/12\/sink-marks-injection-molding-6-edited.jpg\" alt=\"\" class=\"wp-image-14736\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2022\/12\/sink-marks-injection-molding-6-edited.jpg 501w, https:\/\/zetarmold.com\/wp-content\/uploads\/2022\/12\/sink-marks-injection-molding-6-edited-300x225.jpg 300w\" sizes=\"(max-width: 501px) 100vw, 501px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">6. Como evitar a marca de afundamento da presen\u00e7a de bolhas de ar no material fundido\uff1f<\/span><\/h2>\n<p>As marcas de pia s\u00e3o uma adi\u00e7\u00e3o indesej\u00e1vel a qualquer <a href=\"https:\/\/zetarmold.com\/pt\/\" data-type=\"URL\" data-id=\"https:\/\/zetarmold.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">moldagem por inje\u00e7\u00e3o de pl\u00e1stico<\/a> mas existe uma solu\u00e7\u00e3o: equipamento de desgaseifica\u00e7\u00e3o e ventila\u00e7\u00e3o adequada. <\/p>\n<p>Ao assegurar que todas as bolhas de ar foram removidas do material fundido antes de este ser injetado na <a href=\"https:\/\/zetarmold.com\/pt\/\" data-type=\"URL\" data-id=\"https:\/\/zetarmold.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">molde de inje\u00e7\u00e3o<\/a> e ao utilizar moldes bem ventilados, pode garantir que o seu projeto n\u00e3o fica com marcas de pia!<\/p>\n<div style=\"background:#f0f4f8;padding:20px;border-radius:8px;margin-top:30px;\">\n<p style=\"margin:0 0 10px;font-size:18px;\"><strong>Need a Quote for Your Injection Molding Project?<\/strong><\/p>\n<p style=\"margin:0 0 10px;\">Get competitive pricing, DFM feedback, and production timeline from ZetarMold&#8217;s engineering team.<\/p>\n<p style=\"margin:0;\"><a href=\"https:\/\/zetarmold.com\/pt\/contactar-nos\/\" style=\"background:#2563eb;color:white;padding:12px 24px;border-radius:6px;text-decoration:none;font-weight:bold;\">Request a Free Quote \u2192<\/a> See our <a href=\"https:\/\/zetarmold.com\/pt\/injection-molding-complete-guide\/\">Injection Molding Complete Guide<\/a> for a comprehensive overview.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Um dos potenciais inconvenientes do processo de moldagem por inje\u00e7\u00e3o \u00e9 um defeito conhecido como marca de afundamento, em que a superf\u00edcie do produto acabado parece afundada ou c\u00f4ncava devido a um arrefecimento desigual ou \u00e0 contra\u00e7\u00e3o do material.  Neste artigo, discutiremos algumas estrat\u00e9gias para evitar marcas de afundamento na moldagem por inje\u00e7\u00e3o de pl\u00e1stico. [...]<\/p>","protected":false},"author":1,"featured_media":13764,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"How to avoid sink marks in injection molding? | ZetarMold","_seopress_titles_desc":"Learn how to prevent and fix sink marks injection molding in injection molding. ZetarMold's engineers provide proven DFM solutions to eliminate common plastic","_seopress_robots_index":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[52],"tags":[101],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts\/14699"}],"collection":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/comments?post=14699"}],"version-history":[{"count":0,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts\/14699\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/media\/13764"}],"wp:attachment":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/media?parent=14699"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/categories?post=14699"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/tags?post=14699"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}