{"id":40471,"date":"2025-05-07T10:08:29","date_gmt":"2025-05-07T02:08:29","guid":{"rendered":"https:\/\/zetarmold.com\/?p=40471"},"modified":"2026-04-09T08:11:41","modified_gmt":"2026-04-09T00:11:41","slug":"velocidade-de-injecao-na-moldagem-por-injecao","status":"publish","type":"post","link":"https:\/\/zetarmold.com\/pt\/velocidade-de-injecao-na-moldagem-por-injecao\/","title":{"rendered":"O que \u00e9 a velocidade de inje\u00e7\u00e3o na moldagem por inje\u00e7\u00e3o?"},"content":{"rendered":"<figure class=\"wp-block-embed is-type-rich is-provider-spotify wp-block-embed-spotify wp-embed-aspect-21-9 wp-has-aspect-ratio\">\n<div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Spotify Embed: What is Injection Speed in <a href=\"https:>Molde de inje\u00e7\u00e3o<\/a>ing?&#8221; style=&#8221;border-radius: 12px&#8221; width=&#8221;100%&#8221; height=&#8221;152&#8243; frameborder=&#8221;0&#8243; allowfullscreen allow=&#8221;autoplay; clipboard-write; encrypted-media; fullscreen; picture-in-picture&#8221; loading=&#8221;lazy&#8221; src=&#8221;https:\/\/open.spotify.com\/embed\/episode\/3sIwDlnXJSeRfTVeROcwet?si=pKPIWH_nS0m39l7WNp-7Mg&#038;utm_source=oembed&#8221;><\/iframe>\n<\/div>\n<\/figure>\n<p>Introdu\u00e7\u00e3o: <strong>No processo de moldagem por inje\u00e7\u00e3o, a velocidade \u00e9 um par\u00e2metro muito importante, a velocidade de inje\u00e7\u00e3o, definida por par\u00e2metros como o cilindro de inje\u00e7\u00e3o, a press\u00e3o de inje\u00e7\u00e3o p, a velocidade do parafuso, a press\u00e3o da bomba e a fase de enchimento, influencia diretamente a qualidade do produto e a efici\u00eancia da produ\u00e7\u00e3o.<\/strong><\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-130 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=\"600\" height=\"338\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/8-1.jpeg\" alt=\"\" class=\"wp-image-40474\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/8-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/8-1-300x169.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>A velocidade de inje\u00e7\u00e3o, definida por par\u00e2metros como o cilindro de inje\u00e7\u00e3o, a press\u00e3o de inje\u00e7\u00e3o p, a velocidade do parafuso, a press\u00e3o da bomba e a fase de enchimento, influencia diretamente a qualidade do produto e a efici\u00eancia da produ\u00e7\u00e3o. <\/strong>Eis algumas informa\u00e7\u00f5es b\u00e1sicas sobre a velocidade de inje\u00e7\u00e3o:<\/p>\n<h2 class=\"wp-block-heading\"><strong>O que \u00e9 a velocidade de inje\u00e7\u00e3o<\/strong> ?<\/h2>\n<p>A velocidade de inje\u00e7\u00e3o \u00e9 o deslocamento do parafuso de inje\u00e7\u00e3o por unidade de tempo. Afecta diretamente a qualidade e a efici\u00eancia da produ\u00e7\u00e3o do produto.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-131 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=\"600\" height=\"332\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5851\u6599\u6ce8\u5c04\u6210\u578b.jpg\" alt=\"\" class=\"wp-image-40478\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5851\u6599\u6ce8\u5c04\u6210\u578b.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5851\u6599\u6ce8\u5c04\u6210\u578b-300x166.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Para encher o material fundido na cavidade do molde e obter produtos com densidade uniforme e alta precis\u00e3o, o material fundido deve ser enchido na cavidade do molde dentro de um per\u00edodo de tempo para um enchimento r\u00e1pido do molde.<\/p>\n<p>Se a velocidade de inje\u00e7\u00e3o for lenta, o tempo de enchimento do material fundido \u00e9 longo e o produto \u00e9 propenso a juntas frias, densidade irregular, tens\u00e3o elevada e outras desvantagens.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-132 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=\"600\" height=\"241\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/11-1.jpeg\" alt=\"\" class=\"wp-image-40479\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/11-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/11-1-300x121.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>A utiliza\u00e7\u00e3o da inje\u00e7\u00e3o a alta velocidade pode reduzir a diferen\u00e7a de temperatura do material fundido na cavidade do molde, melhorar o efeito de transmiss\u00e3o da press\u00e3o e obter produtos de precis\u00e3o com densidade uniforme e baixa tens\u00e3o.<\/p>\n<p>Mas se a velocidade de inje\u00e7\u00e3o for demasiado elevada, o material fundido fluir\u00e1 facilmente de forma irregular atrav\u00e9s do port\u00e3o e de outros locais, provocando a queima de material, a entrada de g\u00e1s, uma m\u00e1 exaust\u00e3o e afectando diretamente a qualidade da superf\u00edcie do produto.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-133 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=\"600\" height=\"377\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar_httpss.mj_.runonKvqMbIZNU_Small_Mechanical_Parts_GENRE_I_f06f5397-69d5-4c67-825e-955c87376780_1.jpg\" alt=\"\" class=\"wp-image-40438\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar_httpss.mj_.runonKvqMbIZNU_Small_Mechanical_Parts_GENRE_I_f06f5397-69d5-4c67-825e-955c87376780_1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar_httpss.mj_.runonKvqMbIZNU_Small_Mechanical_Parts_GENRE_I_f06f5397-69d5-4c67-825e-955c87376780_1-300x189.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Ao mesmo tempo, se a velocidade de inje\u00e7\u00e3o for demasiado elevada, n\u00e3o \u00e9 f\u00e1cil conseguir uma mudan\u00e7a est\u00e1vel entre a press\u00e3o de inje\u00e7\u00e3o e a press\u00e3o de reten\u00e7\u00e3o, e o produto transborda frequentemente devido \u00e0 sobrepress\u00e3o.<\/p>\n<p>Durante a inje\u00e7\u00e3o, a velocidade de cada ponto da porta e da sec\u00e7\u00e3o transversal da cavidade \u00e9 desigual. No processo de inje\u00e7\u00e3o, \u00e9 necess\u00e1rio que o fluido seja injetado lentamente depois de entrar na cavidade.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-134 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=\"600\" height=\"400\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Plastic-injection-molds-_-parts-plastic-parts-custom-injection-mold-_-parts.jpg\" alt=\"\" class=\"wp-image-40439\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Plastic-injection-molds-_-parts-plastic-parts-custom-injection-mold-_-parts.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Plastic-injection-molds-_-parts-plastic-parts-custom-injection-mold-_-parts-300x200.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Na fase final, a velocidade de inje\u00e7\u00e3o deve ser acelerada para garantir a plenitude, pelo que a velocidade de inje\u00e7\u00e3o deve ser controlada por fases.<\/p>\n<p>O aumento da velocidade de inje\u00e7\u00e3o aumenta a press\u00e3o de enchimento. O enchimento a alta velocidade pode manter a fus\u00e3o a uma temperatura mais elevada, reduzir a viscosidade e a perda de resist\u00eancia do fluido e, assim, aumentar a press\u00e3o da cavidade.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-135 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=\"600\" height=\"442\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/2k-injection-molding-part-3.webp\" alt=\"\" class=\"wp-image-40413\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/2k-injection-molding-part-3.webp 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/2k-injection-molding-part-3-300x221.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Ao mesmo tempo, tamb\u00e9m pode abrandar o arrefecimento, e o produto \u00e9 uniforme e denso. No entanto, se a velocidade for demasiado elevada, o fluxo da massa fundida ser\u00e1 inst\u00e1vel e o molde ficar\u00e1 saliente.<\/p>\n<p>Al\u00e9m disso, a determina\u00e7\u00e3o da velocidade de inje\u00e7\u00e3o deve basear-se em diferentes estruturas de molde, tamanhos, sistemas de canais e propriedades do pol\u00edmero.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-136 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=\"600\" height=\"377\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar_httpss.mj_.runq0LGsm2lA-w_Detailed_Realism_GENRE_Still_L_9e3e82ef-3ea3-4964-a783-9dcc3da5028c_1.jpg\" alt=\"\" class=\"wp-image-40153\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar_httpss.mj_.runq0LGsm2lA-w_Detailed_Realism_GENRE_Still_L_9e3e82ef-3ea3-4964-a783-9dcc3da5028c_1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar_httpss.mj_.runq0LGsm2lA-w_Detailed_Realism_GENRE_Still_L_9e3e82ef-3ea3-4964-a783-9dcc3da5028c_1-300x189.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><strong>Quais s\u00e3o os factores que afectam a velocidade de inje\u00e7\u00e3o?<\/strong><\/h2>\n<h3 class=\"wp-block-heading\"><strong>Conce\u00e7\u00e3o de moldes<\/strong><\/h3>\n<p>Diferentes pl\u00e1sticos t\u00eam diferentes requisitos para a velocidade de inje\u00e7\u00e3o. Geralmente, os pl\u00e1sticos de alta viscosidade requerem velocidades de inje\u00e7\u00e3o mais baixas. Por exemplo, o polietileno de baixa densidade requer uma velocidade de inje\u00e7\u00e3o mais baixa para evitar a gera\u00e7\u00e3o excessiva de calor, a deforma\u00e7\u00e3o ou a contra\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-137 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=\"600\" height=\"441\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/Dingtalk_20240730160936-1.jpg\" alt=\"\" class=\"wp-image-39888\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/Dingtalk_20240730160936-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/Dingtalk_20240730160936-1-300x221.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Ao injetar pl\u00e1stico ABS, \u00e9 necess\u00e1ria uma velocidade de inje\u00e7\u00e3o mais elevada para garantir que a superf\u00edcie da pe\u00e7a de pl\u00e1stico \u00e9 lisa e n\u00e3o produz linhas quentes ou emulsifica\u00e7\u00e3o.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Geometria do molde<\/strong><\/h3>\n<p>A geometria do molde tamb\u00e9m \u00e9 um fator: as pe\u00e7as de paredes finas necessitam da velocidade de inje\u00e7\u00e3o mais elevada; as pe\u00e7as de paredes espessas necessitam de uma curva de velocidade lenta-r\u00e1pida-lenta para evitar defeitos; para garantir que a qualidade da pe\u00e7a \u00e9 boa, a defini\u00e7\u00e3o da velocidade de inje\u00e7\u00e3o deve garantir que o caudal da frente de fus\u00e3o se mant\u00e9m igual.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-138 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=\"600\" height=\"403\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/2-31.jpg\" alt=\"\" class=\"wp-image-39922\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/2-31.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/2-31-300x202.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>A estrutura e a constru\u00e7\u00e3o do molde est\u00e3o diretamente relacionadas com a qualidade da moldagem e a velocidade de inje\u00e7\u00e3o da pe\u00e7a de pl\u00e1stico.<\/p>\n<p>Por exemplo, se o molde tiver uma cavidade grande, \u00e9 necess\u00e1rio injetar o pl\u00e1stico a uma velocidade elevada para preencher toda a cavidade. Se o molde tiver uma cavidade pequena, \u00e9 necess\u00e1rio injetar o pl\u00e1stico a uma velocidade baixa para evitar danificar o molde.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-139 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=\"600\" height=\"343\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/4-21.jpg\" alt=\"\" class=\"wp-image-39665\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/4-21.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/4-21-300x172.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Propriedades do material<\/strong><\/h3>\n<p>As propriedades dos materiais s\u00e3o muito importantes porque os pol\u00edmeros podem quebrar-se devido a diferentes tens\u00f5es.<\/p>\n<p>Se aumentar a temperatura do molde, poder\u00e1 oxidar e quebrar a estrutura qu\u00edmica, mas, ao mesmo tempo, quebrar\u00e1 menos por cisalhamento, porque a temperatura elevada torna o material menos viscoso e reduz a tens\u00e3o de cisalhamento.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-140 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=\"600\" height=\"485\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/galleryimage2-1.jpg\" alt=\"\" class=\"wp-image-40426\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/galleryimage2-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/galleryimage2-1-300x243.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Sem d\u00favida, a velocidade de inje\u00e7\u00e3o em v\u00e1rias fases \u00e9 muito \u00fatil para moldar materiais sens\u00edveis ao calor, como PC, POM, UPVC e respectivas formula\u00e7\u00f5es.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Modelo da m\u00e1quina de inje\u00e7\u00e3o<\/strong><\/h3>\n<p>A velocidade de inje\u00e7\u00e3o \u00e9 diretamente afetada pelos par\u00e2metros da m\u00e1quina de inje\u00e7\u00e3o, tais como a tonelagem, a press\u00e3o do \u00f3leo e o volume de inje\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-141 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=\"600\" height=\"275\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/3-16.jpg\" alt=\"\" class=\"wp-image-39361\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/3-16.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/3-16-300x138.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Em geral, quando as grandes m\u00e1quinas de inje\u00e7\u00e3o s\u00e3o injectadas, necessitam de maior press\u00e3o e volume de inje\u00e7\u00e3o, e a velocidade de inje\u00e7\u00e3o \u00e9 mais r\u00e1pida. As m\u00e1quinas de inje\u00e7\u00e3o pequenas s\u00e3o propensas a fissuras ou defeitos nas pe\u00e7as de pl\u00e1stico devido \u00e0 velocidade de inje\u00e7\u00e3o excessiva.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Compet\u00eancias do operador<\/strong><\/h3>\n<p>A compet\u00eancia do operador tamb\u00e9m afecta diretamente a velocidade de inje\u00e7\u00e3o. Por exemplo, um bom operador pode ajustar a velocidade de inje\u00e7\u00e3o de acordo com o tipo de m\u00e1quina de inje\u00e7\u00e3o e as carater\u00edsticas do pl\u00e1stico para garantir um processo de inje\u00e7\u00e3o suave e uma boa qualidade das pe\u00e7as de pl\u00e1stico.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-142 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=\"600\" height=\"383\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u4fee\u6a21.jpg\" alt=\"\" class=\"wp-image-39999\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u4fee\u6a21.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u4fee\u6a21-300x192.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Outras restri\u00e7\u00f5es de fluxo e factores inst\u00e1veis<\/strong><\/h3>\n<p>Ao definir o segmento de velocidade, \u00e9 necess\u00e1rio ter em conta a geometria do molde, outras restri\u00e7\u00f5es de fluxo e factores inst\u00e1veis. \u00c9 necess\u00e1rio ter uma compreens\u00e3o clara do processo de moldagem por inje\u00e7\u00e3o e do conhecimento do material, caso contr\u00e1rio, ser\u00e1 dif\u00edcil controlar a qualidade do produto.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-143 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=\"600\" height=\"411\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240624160722.jpg\" alt=\"\" class=\"wp-image-40429\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240624160722.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240624160722-300x206.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Uma vez que \u00e9 dif\u00edcil medir diretamente o caudal da massa fundida, este pode ser calculado indiretamente medindo a velocidade de avan\u00e7o do parafuso ou a press\u00e3o da cavidade (para garantir que a v\u00e1lvula de reten\u00e7\u00e3o n\u00e3o tem fugas).<\/p>\n<h3 class=\"wp-block-heading\"><strong>Caudal de fus\u00e3o<\/strong><\/h3>\n<p>A taxa de fluxo de fus\u00e3o \u00e9 muito importante porque afecta a orienta\u00e7\u00e3o molecular e o estado da superf\u00edcie da pe\u00e7a; quando a frente de fus\u00e3o atinge a estrutura da sec\u00e7\u00e3o transversal, deve ser abrandada; para moldes complexos com difus\u00e3o radial, a taxa de fluxo de fus\u00e3o deve ser aumentada uniformemente.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-144 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=\"600\" height=\"311\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/17-1.jpeg\" alt=\"\" class=\"wp-image-40475\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/17-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/17-1-300x156.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Os canais longos t\u00eam de ser enchidos rapidamente para reduzir o arrefecimento da frente de fus\u00e3o, mas a inje\u00e7\u00e3o de materiais de alta viscosidade, como o PC, \u00e9 uma exce\u00e7\u00e3o, porque uma velocidade demasiado r\u00e1pida far\u00e1 com que o material frio entre na cavidade atrav\u00e9s da entrada de \u00e1gua.<\/p>\n<p>Quando a massa fundida passa atrav\u00e9s do bocal e do corredor at\u00e9 \u00e0 entrada de \u00e1gua, a superf\u00edcie da frente de fus\u00e3o pode ter arrefecido e solidificado, ou a massa fundida pode estagnar devido ao s\u00fabito estreitamento do corredor at\u00e9 que seja acumulada press\u00e3o suficiente para empurrar a massa fundida atrav\u00e9s da entrada de \u00e1gua, o que far\u00e1 com que a press\u00e3o atrav\u00e9s da entrada de \u00e1gua atinja o seu pico.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-145 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=\"600\" height=\"300\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/7-1.jpeg\" alt=\"\" class=\"wp-image-40476\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/7-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/7-1-300x150.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Se a press\u00e3o for demasiado elevada, danificar\u00e1 o material e causar\u00e1 defeitos na superf\u00edcie, como marcas de fluxo e queimaduras na entrada de \u00e1gua. Pode resolver este problema abrandando a velocidade imediatamente antes da entrada de \u00e1gua.<\/p>\n<p>Isto ir\u00e1 parar o cisalhamento excessivo na entrada de \u00e1gua e, em seguida, pode acelerar a velocidade de inje\u00e7\u00e3o de volta ao que era. \u00c9 dif\u00edcil controlar a velocidade de inje\u00e7\u00e3o para abrandar na entrada de \u00e1gua, por isso \u00e9 melhor abrandar no fim do corredor.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-146 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=\"600\" height=\"338\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/12-1.jpeg\" alt=\"\" class=\"wp-image-40477\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/12-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/12-1-300x169.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><strong>Como controlar a velocidade de inje\u00e7\u00e3o <\/strong>?<\/h2>\n<p>A taxa de inje\u00e7\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o \u00e9 a velocidade a que o material pl\u00e1stico \u00e9 injetado no molde. Afecta o tempo que o pl\u00e1stico demora a encher o molde e a forma como a press\u00e3o \u00e9 distribu\u00edda no molde.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-147 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=\"600\" height=\"368\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u6c7d\u8f66\u96f6\u90e8\u4ef61-26-1.jpg\" alt=\"\" class=\"wp-image-40139\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u6c7d\u8f66\u96f6\u90e8\u4ef61-26-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u6c7d\u8f66\u96f6\u90e8\u4ef61-26-1-300x184.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>\u00c9 necess\u00e1rio ajustar a velocidade de inje\u00e7\u00e3o com base no produto espec\u00edfico e no material pl\u00e1stico que est\u00e1 a utilizar. Eis algumas formas de controlar a velocidade de inje\u00e7\u00e3o:<\/p>\n<h3 class=\"wp-block-heading\"><strong>Controlo de v\u00e1lvula de controlo convencional<\/strong><\/h3>\n<p>A velocidade de inje\u00e7\u00e3o \u00e9 ajustada atrav\u00e9s do controlo da v\u00e1lvula que controla o fluxo de \u00f3leo. Este m\u00e9todo \u00e9 normalmente utilizado em m\u00e1quinas de moldagem por inje\u00e7\u00e3o simples e tem uma fun\u00e7\u00e3o de ajuste de velocidade relativamente b\u00e1sica.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-148 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=\"600\" height=\"244\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u6c7d\u8f66\u96f6\u90e8\u4ef69-10.jpg\" alt=\"\" class=\"wp-image-40135\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u6c7d\u8f66\u96f6\u90e8\u4ef69-10.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u6c7d\u8f66\u96f6\u90e8\u4ef69-10-300x122.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Controlo de v\u00e1lvula de controlo convencional<\/strong><\/h3>\n<p>O sistema de inje\u00e7\u00e3o \u00e9 acionado por um servo motor e a velocidade de inje\u00e7\u00e3o \u00e9 controlada atrav\u00e9s do ajuste da velocidade do motor. Este m\u00e9todo tem maior precis\u00e3o e velocidade de resposta e \u00e9 adequado para processos de moldagem por inje\u00e7\u00e3o de alta exig\u00eancia.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Controlo proporcional de v\u00e1lvulas<\/strong><\/h3>\n<p>A v\u00e1lvula proporcional controla o fluxo atrav\u00e9s de um sinal eletromagn\u00e9tico, de modo a que a velocidade de inje\u00e7\u00e3o possa ser ajustada e controlada com precis\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-149 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=\"600\" height=\"336\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runh2w0nm-V07s_Injection_molding_of_elect_5d4b99e7-e7a3-480e-8056-93b9dc5d2b4c_1.jpg\" alt=\"\" class=\"wp-image-39765\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runh2w0nm-V07s_Injection_molding_of_elect_5d4b99e7-e7a3-480e-8056-93b9dc5d2b4c_1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runh2w0nm-V07s_Injection_molding_of_elect_5d4b99e7-e7a3-480e-8056-93b9dc5d2b4c_1-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><strong>Como definir a velocidade de inje\u00e7\u00e3o<\/strong> ?<\/h2>\n<h3 class=\"wp-block-heading\"><strong>Selecionar a velocidade de inje\u00e7\u00e3o de acordo com as carater\u00edsticas do produto<\/strong><\/h3>\n<p>Escolha a velocidade de inje\u00e7\u00e3o com base nas diferentes carater\u00edsticas do produto, como a sua estrutura, tamanho, espessura, material e outros factores. Diferentes produtos requerem diferentes velocidades de inje\u00e7\u00e3o e \u00e9 necess\u00e1rio ajustar a velocidade de inje\u00e7\u00e3o para obter o melhor efeito de moldagem.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Fazer ajustamentos razo\u00e1veis<\/strong><\/h3>\n<p>Deve ajustar a velocidade de inje\u00e7\u00e3o em fun\u00e7\u00e3o da situa\u00e7\u00e3o real. N\u00e3o se deve ir demasiado depressa nem demasiado devagar, sen\u00e3o n\u00e3o se consegue fazer grande coisa.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-150 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=\"600\" height=\"363\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Custom-Plastic-Injection-Molding-Product-ABS-PC-Injection-Molding-Parts.jpg\" alt=\"\" class=\"wp-image-40156\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Custom-Plastic-Injection-Molding-Product-ABS-PC-Injection-Molding-Parts.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Custom-Plastic-Injection-Molding-Product-ABS-PC-Injection-Molding-Parts-300x182.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Utilizar a tecnologia de processamento cient\u00edfico<\/strong><\/h3>\n<p>Utilizar tecnologia de processamento de moldagem por inje\u00e7\u00e3o cient\u00edfica e razo\u00e1vel, combinada com a experi\u00eancia de produ\u00e7\u00e3o, condi\u00e7\u00f5es reais, desempenho m\u00e9dio e outros factores para otimiza\u00e7\u00e3o.<\/p>\n<p>A tecnologia de processamento cient\u00edfico pode maximizar a correspond\u00eancia entre a velocidade de inje\u00e7\u00e3o e as carater\u00edsticas do produto para obter o melhor efeito de processamento.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-151 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=\"600\" height=\"336\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runCl8Y5oj1MWw_Injection_molding_of_vario_13475a22-2bb9-4885-81fd-24e5cfe53ba1_2.jpg\" alt=\"\" class=\"wp-image-39634\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runCl8Y5oj1MWw_Injection_molding_of_vario_13475a22-2bb9-4885-81fd-24e5cfe53ba1_2.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runCl8Y5oj1MWw_Injection_molding_of_vario_13475a22-2bb9-4885-81fd-24e5cfe53ba1_2-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><strong>Como escolher a velocidade de inje\u00e7\u00e3o<\/strong> ?<\/h2>\n<p>De acordo com o fluxo da massa fundida durante o processo de inje\u00e7\u00e3o, dividimos geralmente a velocidade de inje\u00e7\u00e3o em cinco partes:<\/p>\n<h3 class=\"wp-block-heading\"><strong>Enchimento a alta velocidade<\/strong><\/h3>\n<p>A primeira parte \u00e9 o canal principal e o canal de deriva\u00e7\u00e3o. Em princ\u00edpio, \u00e9 utilizado o enchimento a alta velocidade, o que pode encurtar o ciclo de moldagem, mas deve considerar-se que esta inje\u00e7\u00e3o a alta velocidade n\u00e3o deve causar m\u00e1 qualidade da superf\u00edcie.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-152 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=\"600\" height=\"336\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runVmnNq-1etnc_Injection_molding_of_vario_690e9e59-f15c-48a8-b8e0-9beb86c73df8_1.jpg\" alt=\"\" class=\"wp-image-39643\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runVmnNq-1etnc_Injection_molding_of_vario_690e9e59-f15c-48a8-b8e0-9beb86c73df8_1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runVmnNq-1etnc_Injection_molding_of_vario_690e9e59-f15c-48a8-b8e0-9beb86c73df8_1-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Baixa velocidade de inje\u00e7\u00e3o<\/strong><\/h3>\n<p>A segunda parte \u00e9 o port\u00e3o e a parte do produto junto ao port\u00e3o. Esta fase efectua as altera\u00e7\u00f5es correspondentes para diferentes mat\u00e9rias-primas e formas de port\u00e3o.<\/p>\n<p>Normalmente, \u00e9 prefer\u00edvel utilizar uma velocidade de inje\u00e7\u00e3o mais baixa, especialmente para resinas de alta viscosidade, como PC, PMMA, ABS, etc., e port\u00f5es laterais (port\u00f5es rectos, como chapas transparentes de arm\u00e1rios, coberturas de portas de pain\u00e9is de m\u00e1quinas de janelas e l\u00e2minas longitudinais, etc.) para evitar marcas de pulveriza\u00e7\u00e3o e manchas de n\u00e9voa no port\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-153 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=\"600\" height=\"336\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runie9wJf3j0oo_injection_molding_product__51272f01-cb92-4a36-886e-6af1adc52e67_3.jpg\" alt=\"\" class=\"wp-image-39768\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runie9wJf3j0oo_injection_molding_product__51272f01-cb92-4a36-886e-6af1adc52e67_3.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runie9wJf3j0oo_injection_molding_product__51272f01-cb92-4a36-886e-6af1adc52e67_3-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Se o port\u00e3o for um port\u00e3o pontual ou um port\u00e3o de t\u00fanel e o material for uma resina de baixa viscosidade como PP, PA, PBT, etc., e os requisitos de qualidade da superf\u00edcie perto do port\u00e3o n\u00e3o forem elevados, pode ser utilizada a inje\u00e7\u00e3o a alta velocidade.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Princ\u00edpios da inje\u00e7\u00e3o a alta velocidade<\/strong><\/h3>\n<p>A terceira parte \u00e9 a parte principal da pe\u00e7a moldada, ou seja, o produto perto do port\u00e3o \u00e9 preenchido com cerca de 70% a 80% do peso da pe\u00e7a moldada.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-154 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=\"600\" height=\"336\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.run9j0ZSvE1LbM_Injection_molding_of_vario_59318183-d4b2-4123-9450-7288005cefd7_1.jpg\" alt=\"\" class=\"wp-image-39633\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.run9j0ZSvE1LbM_Injection_molding_of_vario_59318183-d4b2-4123-9450-7288005cefd7_1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.run9j0ZSvE1LbM_Injection_molding_of_vario_59318183-d4b2-4123-9450-7288005cefd7_1-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Esta pe\u00e7a utiliza inje\u00e7\u00e3o a alta velocidade para encurtar o ciclo de moldagem, reduzir a altera\u00e7\u00e3o da viscosidade da massa fundida na cavidade do molde met\u00e1lico, melhorar o brilho da superf\u00edcie do produto e reduzir a deforma\u00e7\u00e3o causada pela diminui\u00e7\u00e3o da press\u00e3o do pl\u00e1stico durante o enchimento do molde. Pode melhorar a resist\u00eancia e o aspeto da linha de soldadura.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Inje\u00e7\u00e3o de velocidade m\u00e9dia<\/strong><\/h3>\n<p>A quarta parte est\u00e1 cheia com cerca de 85% a 90%. Esta pe\u00e7a \u00e9 injectada a uma velocidade m\u00e9dia. O objetivo \u00e9 fazer a transi\u00e7\u00e3o para a inje\u00e7\u00e3o a baixa velocidade da fase seguinte e evitar que o produto moldado seja demasiado espesso e fique a piscar devido a uma porta irregular.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-155 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=\"600\" height=\"336\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runF0znDyT992E_Injection_molding_of_vario_f4506c61-f6b1-4c90-9efb-8fd9ee770056_3.jpg\" alt=\"\" class=\"wp-image-39644\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runF0znDyT992E_Injection_molding_of_vario_f4506c61-f6b1-4c90-9efb-8fd9ee770056_3.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/zetar6756_httpss.mj_.runF0znDyT992E_Injection_molding_of_vario_f4506c61-f6b1-4c90-9efb-8fd9ee770056_3-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Inje\u00e7\u00e3o a baixa velocidade<\/strong><\/h3>\n<p>O quinto passo \u00e9 o enchimento final da cavidade. Utiliza-se aqui a inje\u00e7\u00e3o a baixa velocidade para evitar marcas de queimadura e melhorar a estabilidade do tamanho e peso do produto. Ao mesmo tempo, tamb\u00e9m pode controlar e reduzir a press\u00e3o de aperto.<\/p>\n<h2 class=\"wp-block-heading\"><strong>Que problemas podem ser resolvidos com o ajuste da velocidade de inje\u00e7\u00e3o<\/strong> ?<\/h2>\n<p>Podemos evitar ou reduzir defeitos como flashing, queima e ar preso, controlando a velocidade de inje\u00e7\u00e3o da \u00faltima fase.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-156 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=\"600\" height=\"396\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u98de\u8fb9a-1.jpg\" alt=\"\" class=\"wp-image-38219\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u98de\u8fb9a-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u98de\u8fb9a-1-300x198.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Flash<\/strong><\/h3>\n<p>Abrandar a velocidade no final do enchimento pode prevenir o empacotamento excessivo, evitar o flash e reduzir a tens\u00e3o residual. A redu\u00e7\u00e3o da velocidade de ventila\u00e7\u00e3o, especialmente no final da inje\u00e7\u00e3o, tamb\u00e9m pode resolver o problema do ar preso causado por uma ventila\u00e7\u00e3o deficiente no final do percurso do fluxo ou problemas de press\u00e3o m\u00ednima de enchimento.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-157 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=\"600\" height=\"206\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u98de\u8fb9.jpg\" alt=\"\" class=\"wp-image-40481\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u98de\u8fb9.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u98de\u8fb9-300x103.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Tiro curto<\/strong><\/h3>\n<p>O tiro curto ocorre quando a fus\u00e3o abranda na entrada de \u00e1gua ou quando a fus\u00e3o solidifica e bloqueia o fluxo localmente. Pode resolver este problema aumentando a velocidade de inje\u00e7\u00e3o logo ap\u00f3s a entrada de \u00e1gua ou o bloqueio do fluxo local.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-158 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=\"600\" height=\"311\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u77ed\u5c04.jpg\" alt=\"\" class=\"wp-image-40482\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u77ed\u5c04.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u77ed\u5c04-300x156.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Defeitos como marcas de fluxo, queimaduras na entrada de \u00e1gua, rutura molecular, delamina\u00e7\u00e3o e descama\u00e7\u00e3o em materiais sens\u00edveis ao calor s\u00e3o causados por demasiado cisalhamento quando passam pela entrada de \u00e1gua.<\/p>\n<p>As partes lisas dependem da velocidade de inje\u00e7\u00e3o e os materiais com enchimento de fibra de vidro s\u00e3o particularmente sens\u00edveis, especialmente o nylon. As manchas escuras (padr\u00f5es ondulados) s\u00e3o causadas pela instabilidade do fluxo devido a altera\u00e7\u00f5es de viscosidade. O fluxo distorcido pode causar padr\u00f5es ondulados ou n\u00e9voa irregular, e o defeito exato depende da gravidade da instabilidade do fluxo.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-159 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=\"600\" height=\"368\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240806095424.jpg\" alt=\"\" class=\"wp-image-40483\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240806095424.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240806095424-300x184.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Quando a massa fundida passa pela entrada de \u00e1gua, a inje\u00e7\u00e3o a alta velocidade provoca um elevado cisalhamento e os pl\u00e1sticos sens\u00edveis ao calor s\u00e3o queimados. Este material queimado atravessar\u00e1 a cavidade, alcan\u00e7ar\u00e1 a frente de fluxo e aparecer\u00e1 na superf\u00edcie da pe\u00e7a.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Padr\u00e3o de disparo<\/strong><\/h3>\n<p>Para evitar o padr\u00e3o de disparo, a defini\u00e7\u00e3o da velocidade de inje\u00e7\u00e3o deve assegurar que a \u00e1rea das linhas de fluxo se enche rapidamente e depois passa lentamente pela entrada de \u00e1gua. Encontrar este ponto de transi\u00e7\u00e3o de velocidade \u00e9 a ess\u00eancia do problema. Se for demasiado cedo, o tempo de enchimento ser\u00e1 excessivamente aumentado.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-160 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=\"600\" height=\"318\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5c04\u7eb9.jpg\" alt=\"\" class=\"wp-image-40484\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5c04\u7eb9.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5c04\u7eb9-300x159.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Se for tarde demais, a in\u00e9rcia excessiva do fluxo causar\u00e1 um padr\u00e3o de tiro. Quanto mais baixa for a viscosidade da massa fundida e mais alta for a temperatura do cilindro, mais \u00f3bvia ser\u00e1 a tend\u00eancia para este padr\u00e3o de inje\u00e7\u00e3o. Uma vez que as pequenas entradas de \u00e1gua requerem inje\u00e7\u00e3o a alta velocidade e alta press\u00e3o, s\u00e3o tamb\u00e9m um fator importante que conduz a defeitos de fluxo.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Retra\u00e7\u00e3o<\/strong><\/h3>\n<p>Para reduzir a contra\u00e7\u00e3o, \u00e9 necess\u00e1rio melhorar a transmiss\u00e3o da press\u00e3o e reduzir a queda de press\u00e3o. A baixa temperatura do molde e a baixa velocidade de avan\u00e7o do parafuso tornam o comprimento do fluxo mais curto, pelo que \u00e9 necess\u00e1rio utilizar uma velocidade de inje\u00e7\u00e3o elevada para compensar.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-161 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=\"600\" height=\"400\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u7f29\u6c34.jpg\" alt=\"\" class=\"wp-image-40485\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u7f29\u6c34.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u7f29\u6c34-300x200.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>O fluxo r\u00e1pido reduz a perda de calor, e o calor gerado pelo elevado calor de cisalhamento far\u00e1 com que a temperatura de fus\u00e3o aumente e abrande a taxa de espessamento da camada exterior da pe\u00e7a. A intersec\u00e7\u00e3o da cavidade deve ser suficientemente espessa para evitar uma queda de press\u00e3o excessiva, caso contr\u00e1rio ocorrer\u00e1 retra\u00e7\u00e3o.<\/p>\n<h2 class=\"wp-block-heading\"><strong>Conclus\u00e3o<\/strong><\/h2>\n<p>Em conclus\u00e3o, a velocidade de inje\u00e7\u00e3o \u00e9 muito importante no processo de moldagem por inje\u00e7\u00e3o. Ao controlar a velocidade de inje\u00e7\u00e3o, \u00e9 poss\u00edvel melhorar o aspeto do produto, fabricar mais produtos e garantir que o produto tem o tamanho certo e \u00e9 forte.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-162 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=\"600\" height=\"336\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar_httpss.mj_.runGXZ4xOOmo-k_plastic_injection_molding_prod_b9c89543-9219-4928-9205-13cc1e200da8_0.jpg\" alt=\"\" class=\"wp-image-40158\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar_httpss.mj_.runGXZ4xOOmo-k_plastic_injection_molding_prod_b9c89543-9219-4928-9205-13cc1e200da8_0.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar_httpss.mj_.runGXZ4xOOmo-k_plastic_injection_molding_prod_b9c89543-9219-4928-9205-13cc1e200da8_0-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Diferentes materiais, diferentes estruturas de molde e diferentes requisitos de produto requerem um ajuste cuidadoso e um controlo preciso da velocidade de inje\u00e7\u00e3o para obter o melhor efeito de moldagem.<\/p>\n<p>Por conseguinte, um conhecimento profundo do processo de moldagem por inje\u00e7\u00e3o e das propriedades dos materiais, bem como das pr\u00e1ticas cient\u00edficas de produ\u00e7\u00e3o, constituir\u00e1 um apoio fundamental para otimizar a produ\u00e7\u00e3o de moldagem por inje\u00e7\u00e3o.<\/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":"","protected":false},"author":1,"featured_media":40478,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Injection Speed in Injection Molding? | ZetarMold","_seopress_titles_desc":"Discover expert insights on injection speed in injection molding from ZetarMold. We provide professional injection molding services with DFM support, fast","_seopress_robots_index":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[42],"tags":[159,135,186,72,187],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts\/40471"}],"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=40471"}],"version-history":[{"count":0,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts\/40471\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/media\/40478"}],"wp:attachment":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/media?parent=40471"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/categories?post=40471"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/tags?post=40471"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}