{"id":41689,"date":"2025-06-27T10:02:05","date_gmt":"2025-06-27T02:02:05","guid":{"rendered":"https:\/\/zetarmold.com\/?p=41689"},"modified":"2026-04-09T08:10:21","modified_gmt":"2026-04-09T00:10:21","slug":"causas-e-solucoes-rebarbas-produtos-moldados-por-injecao","status":"publish","type":"post","link":"https:\/\/zetarmold.com\/pt\/causas-e-solucoes-rebarbas-produtos-moldados-por-injecao\/","title":{"rendered":"Quais s\u00e3o as causas e solu\u00e7\u00f5es para as rebarbas em produtos moldados 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 are the Causes and Solutions for Burrs in <a href=\"https:>Molde de inje\u00e7\u00e3o<\/a>ed Products&#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\/6KZdh9imaWleEmXTT4At78?si=E5yzm5UiRg2edeQ8h5utfA&#038;utm_source=oembed&#8221;><\/iframe>\n<\/div>\n<\/figure>\n<p>Introduction: In injection molding, burrs are a common injection molding defects that can occur. Some are caused by problems with the mold design and manufacturing, while others are caused by issues with the injection molding process.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-802 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=\"388\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/9.jpg\" alt=\"\" class=\"wp-image-41718\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/9.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/9-300x194.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Hoje, vamos dar uma olhada no porqu\u00ea das rebarbas. As rebarbas ocorrem normalmente na linha de separa\u00e7\u00e3o, que \u00e9 onde o material fundido flui entre os moldes m\u00f3veis e estacion\u00e1rios, a parte deslizante da corredi\u00e7a, o espa\u00e7o entre as pastilhas, o orif\u00edcio do pino ejetor, etc., causando um brilho excessivo nas pe\u00e7as.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-803 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=\"265\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/8.jpg\" alt=\"\" class=\"wp-image-41703\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/8.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/8-300x133.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Este flash actua como uma alavanca durante a moldagem, o que aumentar\u00e1 ainda mais o flash, causando uma depress\u00e3o local do molde, formando um ciclo vicioso de aumento do flash durante a moldagem. Os defeitos de moldagem por inje\u00e7\u00e3o ocorrem normalmente devido a uma press\u00e3o de inje\u00e7\u00e3o excessiva, resultando em rebarbas na fenda da cavidade do molde.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-804 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=\"351\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/10.jpg\" alt=\"\" class=\"wp-image-41719\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/10.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/10-300x176.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Por conseguinte, se o flash for encontrado no in\u00edcio, o molde deve ser cortado o mais rapidamente poss\u00edvel. Este artigo aborda principalmente as causas do flash e a forma de o resolver.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-805 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=\"330\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/6.jpg\" alt=\"\" class=\"wp-image-41704\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/6.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/6-300x165.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 as causas das rebarbas?<\/strong><\/h2>\n<h3 class=\"wp-block-heading\"><strong>For\u00e7a de aperto insuficiente<\/strong><\/h3>\n<p>Se a for\u00e7a de aperto for pequena em compara\u00e7\u00e3o com a \u00e1rea projectada da pe\u00e7a moldada, a press\u00e3o de inje\u00e7\u00e3o causar\u00e1 um espa\u00e7o entre os moldes em movimento e estacion\u00e1rios, resultando em flash.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-806 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=\"474\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/11.jpg\" alt=\"\" class=\"wp-image-41722\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/11.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/11-300x237.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Isto \u00e9 especialmente verdade quando o port\u00e3o lateral \u00e9 colocado perto do centro da pe\u00e7a, uma vez que este tipo de port\u00e3o requer uma press\u00e3o de inje\u00e7\u00e3o mais elevada e \u00e9 mais prov\u00e1vel que cause flashes.<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"404\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/12.jpg\" alt=\"\" class=\"wp-image-41720\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/12.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/12-300x202.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<p>Este problema pode ser resolvido diminuindo a press\u00e3o de inje\u00e7\u00e3o ou aumentando a for\u00e7a de aperto. Por vezes, se utilizar um pl\u00e1stico que flui bem para a moldagem a baixa press\u00e3o, este funciona muito bem.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-807 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=\"399\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/5.jpg\" alt=\"\" class=\"wp-image-41705\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/5.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/5-300x200.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>O molde local n\u00e3o est\u00e1 bem ajustado<\/strong><\/h3>\n<p>Vamos falar sobre o problema da fixa\u00e7\u00e3o solta dos moldes din\u00e2micos e est\u00e1ticos. Embora o molde em si esteja bem fixo, quando utilizamos uma m\u00e1quina de moldagem por inje\u00e7\u00e3o com um mecanismo de fixa\u00e7\u00e3o do tipo alternado para moldar, isso deve-se frequentemente a um mau paralelismo do molde ou a um mau ajuste do dispositivo de fixa\u00e7\u00e3o.<\/p>\n<p>Tal como a fixa\u00e7\u00e3o desequilibrada nos lados esquerdo e direito, ou seja, apenas um lado dos lados esquerdo e direito est\u00e1 bloqueado, e o outro lado n\u00e3o est\u00e1 bem preso. Nesta altura, temos de ajustar os tirantes (dois ou quatro tirantes) para equilibrar e expandir.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-808 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=\"309\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/2-1.jpeg\" alt=\"\" class=\"wp-image-41692\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/2-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/2-1-300x155.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Al\u00e9m disso, h\u00e1 outro ajuste frouxo causado por uma m\u00e1 combina\u00e7\u00e3o de moldes. Especialmente quando existe um orif\u00edcio de moldagem no centro da pe\u00e7a, devido ao papel de suporte desta pe\u00e7a, as rebarbas tamb\u00e9m s\u00e3o propensas a aparecer quando a for\u00e7a de aperto n\u00e3o \u00e9 suficiente.<\/p>\n<p>Outro tipo \u00e9 o n\u00facleo deslizante. Uma vez que o n\u00facleo m\u00f3vel \u00e9 um mecanismo m\u00f3vel, ocorrem frequentemente rebarbas, pelo que a correspond\u00eancia do n\u00facleo deslizante \u00e9 muito importante. Especialmente no caso do meio molde dividido \u00e0 esquerda e \u00e0 direita, a \u00e1rea projectada do seu lado tamb\u00e9m \u00e9 afetada pela press\u00e3o de moldagem.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-809 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=\"397\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/\u8131\u819c-1.jpg\" alt=\"\" class=\"wp-image-41693\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/\u8131\u819c-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/\u8131\u819c-1-300x199.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Se o desenho n\u00e3o conseguir suportar totalmente esta press\u00e3o, aparecer\u00e3o frequentemente rebarbas. Relativamente ao espa\u00e7o entre as pastilhas e o pino ejetor, n\u00e3o s\u00f3 as rebarbas aumentar\u00e3o num ciclo vicioso, como tamb\u00e9m a resist\u00eancia \u00e0 eje\u00e7\u00e3o aumentar\u00e1.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Causada pela deflex\u00e3o do molde<\/strong><\/h3>\n<p>Se o molde n\u00e3o for suficientemente original, ser\u00e1 desviado pela press\u00e3o de inje\u00e7\u00e3o. Nesta altura, se houver um orif\u00edcio perto do centro, ser\u00e3o geradas rebarbas \u00e0 volta do orif\u00edcio; e quando a porta lateral \u00e9 aberta usando o orif\u00edcio central, tamb\u00e9m ser\u00e3o geradas rebarbas \u00e0 volta do orif\u00edcio e do corredor. O refor\u00e7o do molde pode reduzir as rebarbas.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-810 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=\"373\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/\u5f00\u6a21-3.jpg\" alt=\"\" class=\"wp-image-41694\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/\u5f00\u6a21-3.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/\u5f00\u6a21-3-300x187.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Estrutura de moldes n\u00e3o razo\u00e1vel<\/strong><\/h3>\n<p>A estrutura do molde tem um grande impacto na qualidade das pe\u00e7as moldadas. Se a estrutura do molde n\u00e3o for boa, as pe\u00e7as moldadas ter\u00e3o rebarbas. Por exemplo, se houver cantos afiados no molde, o material ser\u00e1 espremido e esticado, e formar-se-\u00e3o rebarbas.<\/p>\n<p>A conce\u00e7\u00e3o do molde \u00e9 um dos factores importantes que afectam a qualidade do produto. Na conce\u00e7\u00e3o da estrutura do molde, os requisitos de precis\u00e3o da estrutura e do processamento do molde n\u00e3o s\u00e3o suficientemente considerados, resultando num processamento desigual da superf\u00edcie do molde, num \u00e2ngulo de partida insuficiente e noutros problemas, que causar\u00e3o rebarbas.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-811 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\/09\/13-2.jpeg\" alt=\"\" class=\"wp-image-41695\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/13-2.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/13-2-300x200.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Mau tratamento da superf\u00edcie do molde<\/strong><\/h3>\n<p>Quando se utiliza a superf\u00edcie do molde, esta desgasta-se e fica com fissuras devido ao calor. Se n\u00e3o tratar corretamente a superf\u00edcie do molde, tamb\u00e9m ir\u00e1 obter rebarbas.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Mat\u00e9rias estranhas na superf\u00edcie do molde<\/strong><\/h3>\n<p>Se houver mat\u00e9rias estranhas na superf\u00edcie de contacto do molde, ser\u00e3o inevitavelmente geradas rebarbas. Al\u00e9m disso, depois de o molde ser produzido, tamb\u00e9m devemos prestar aten\u00e7\u00e3o \u00e0 sua limpeza atempada e \u00e0 manuten\u00e7\u00e3o di\u00e1ria, o que n\u00e3o s\u00f3 reduzir\u00e1 a ocorr\u00eancia de problemas no molde, como tamb\u00e9m prolongar\u00e1 a vida \u00fatil do molde.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-812 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=\"450\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/4-1.jpeg\" alt=\"\" class=\"wp-image-41696\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/4-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/4-1-300x225.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Demasiada inje\u00e7\u00e3o de material fundido<\/strong><\/h3>\n<p>Normalmente, isso n\u00e3o acontece. Normalmente, quando se ajustam os par\u00e2metros da m\u00e1quina, por falta de material localmente ou porque se est\u00e1 a injetar demasiado material fundido para evitar a contra\u00e7\u00e3o, o molde vai inchar e obter\u00e1 flash. \u00c9 necess\u00e1rio aumentar o tempo de inje\u00e7\u00e3o ou o tempo de espera para moldar.<\/p>\n<h3 class=\"wp-block-heading\"><strong>A fluidez do pl\u00e1stico \u00e9 demasiado boa<\/strong><\/h3>\n<p>O facto de o fluxo de fus\u00e3o ser bom n\u00e3o significa que haja flashes. No entanto, se o fluxo da massa fundida for demasiado bom, pode entrar nas mais pequenas fendas e causar flashes. Para eliminar o flash, pode reduzir a temperatura de fus\u00e3o ou a press\u00e3o de inje\u00e7\u00e3o, ou reduzir a temperatura do molde ou a velocidade de inje\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-813 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\/09\/7-1.jpeg\" alt=\"\" class=\"wp-image-41697\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/7-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/7-1-300x150.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Problemas de qualidade das mat\u00e9rias-primas<\/strong><\/h3>\n<p>A rebarba das pe\u00e7as moldadas por inje\u00e7\u00e3o pode ser causada pelo problema das mat\u00e9rias-primas. Por exemplo, as part\u00edculas de pl\u00e1stico de diferentes tamanhos e demasiadas impurezas afectar\u00e3o a qualidade da moldagem das pe\u00e7as moldadas por inje\u00e7\u00e3o. Neste momento, \u00e9 necess\u00e1rio come\u00e7ar com a sele\u00e7\u00e3o e triagem de mat\u00e9rias-primas e tratamento de secagem.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Sele\u00e7\u00e3o inadequada de material<\/strong><\/h3>\n<p>The materials you choose are also important for injection molding success. If the plastic you pick melts at too high a temperature, it can cause poor plastic flow and create burrs. Impurities in the material can also cause burrs.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-814 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=\"391\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Thermoplastic-Material.jpg\" alt=\"\" class=\"wp-image-40736\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Thermoplastic-Material.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Thermoplastic-Material-300x196.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Controlo inadequado da temperatura e da press\u00e3o de moldagem por inje\u00e7\u00e3o<\/strong><\/h3>\n<p>Antes de iniciar a moldagem por inje\u00e7\u00e3o, \u00e9 necess\u00e1rio controlar a temperatura e a press\u00e3o da moldagem por inje\u00e7\u00e3o. Se a temperatura e a press\u00e3o forem demasiado altas ou demasiado baixas, isso afectar\u00e1 a qualidade do produto moldado. Por exemplo, se a temperatura for demasiado alta, o pl\u00e1stico n\u00e3o fluir\u00e1 bem, e se a temperatura for demasiado baixa, o produto ter\u00e1 um mau acabamento superficial e ter\u00e1 muitas rebarbas.<\/p>\n<p>A press\u00e3o de inje\u00e7\u00e3o \u00e9 um fator muito importante no processo de moldagem por inje\u00e7\u00e3o. Se a press\u00e3o de inje\u00e7\u00e3o for inst\u00e1vel, o pl\u00e1stico fundido n\u00e3o fluir\u00e1 suavemente, fazendo com que o pl\u00e1stico seja espremido e cortado no molde, resultando em rebarbas.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-815 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\/09\/8-2.jpeg\" alt=\"\" class=\"wp-image-41698\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/8-2.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/8-2-300x169.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Par\u00e2metros do processo de moldagem por inje\u00e7\u00e3o n\u00e3o razo\u00e1veis<\/strong><\/h3>\n<p>A gera\u00e7\u00e3o de rebarbas nas pe\u00e7as moldadas por inje\u00e7\u00e3o est\u00e1 tamb\u00e9m relacionada com os par\u00e2metros do processo de moldagem por inje\u00e7\u00e3o. Por exemplo, defini\u00e7\u00f5es pouco razo\u00e1veis de par\u00e2metros como a temperatura, press\u00e3o e velocidade de inje\u00e7\u00e3o causar\u00e3o rebarbas nas pe\u00e7as moldadas por inje\u00e7\u00e3o. A solu\u00e7\u00e3o \u00e9 ajustar cada par\u00e2metro um a um de acordo com a situa\u00e7\u00e3o espec\u00edfica para garantir a qualidade da moldagem por inje\u00e7\u00e3o.<\/p>\n<p>Se o processo de moldagem por inje\u00e7\u00e3o n\u00e3o for normalizado ou for mal operado, tamb\u00e9m causar\u00e1 rebarbas nas pe\u00e7as moldadas por inje\u00e7\u00e3o. Por exemplo, uma temperatura inst\u00e1vel durante a moldagem por inje\u00e7\u00e3o, um tempo de inje\u00e7\u00e3o demasiado longo, etc., ter\u00e3o um impacto negativo nas pe\u00e7as moldadas por inje\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-816 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\/09\/17-1.jpeg\" alt=\"\" class=\"wp-image-41699\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/17-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/17-1-300x156.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Problemas de conce\u00e7\u00e3o da estrutura do molde<\/strong><\/h3>\n<p>A gera\u00e7\u00e3o de rebarbas em pe\u00e7as moldadas por inje\u00e7\u00e3o pode tamb\u00e9m estar relacionada com a conce\u00e7\u00e3o da estrutura do molde. A parte do molde onde aparecem as rebarbas pode dever-se a g\u00e1s residual que permanece no molde ou pode haver buracos no molde. O molde tem de ser verificado e melhorado para garantir que a estrutura do molde cumpre os requisitos do processo de moldagem por inje\u00e7\u00e3o.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Problemas de equipamento da m\u00e1quina de moldagem por inje\u00e7\u00e3o<\/strong><\/h3>\n<p>A gera\u00e7\u00e3o de rebarbas nas pe\u00e7as moldadas por inje\u00e7\u00e3o tamb\u00e9m pode estar relacionada com problemas no pr\u00f3prio equipamento da m\u00e1quina de moldagem por inje\u00e7\u00e3o. Se a m\u00e1quina de moldagem por inje\u00e7\u00e3o tiver problemas como press\u00e3o inst\u00e1vel e temperatura irregular, causar\u00e1 rebarbas nas pe\u00e7as moldadas por inje\u00e7\u00e3o. Neste momento, a m\u00e1quina de moldagem por inje\u00e7\u00e3o tem de ser inspeccionada e reparada.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-817 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=\"296\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5367\u5f0f\u6ce8\u5851\u673a.jpg\" alt=\"\" class=\"wp-image-40591\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5367\u5f0f\u6ce8\u5851\u673a.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5367\u5f0f\u6ce8\u5851\u673a-300x148.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 as formas de evitar e resolver as rebarbas nas pe\u00e7as moldadas por inje\u00e7\u00e3o?<\/strong><\/h2>\n<h3 class=\"wp-block-heading\"><strong>Melhorar a estrutura do molde<\/strong><\/h3>\n<p>Para evitar rebarbas, \u00e9 importante melhorar a estrutura do molde. Para melhorar a precis\u00e3o da superf\u00edcie do molde e a qualidade do processamento, e reduzir a gera\u00e7\u00e3o de rebarbas, pode melhorar e conceber o molde com base nas defici\u00eancias da estrutura do molde e na precis\u00e3o do processamento.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Rebarba\u00e7\u00e3o de moldes<\/strong><\/h3>\n<p>Antes de iniciar a moldagem por inje\u00e7\u00e3o, \u00e9 necess\u00e1rio preparar a superf\u00edcie do molde para a manter lisa e plana e evitar a forma\u00e7\u00e3o de rebarbas. Requer um determinado custo de produ\u00e7\u00e3o do molde (molde bruto + molde fino), e pode tamb\u00e9m requerer um molde de pl\u00e1stico. \u00c9 adequado para produtos com superf\u00edcies de separa\u00e7\u00e3o simples, e a efici\u00eancia e o efeito de rebarba\u00e7\u00e3o s\u00e3o melhores do que o manual.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-818 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=\"373\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/\u5f00\u6a21-2.jpg\" alt=\"\" class=\"wp-image-41636\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/\u5f00\u6a21-2.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/\u5f00\u6a21-2-300x187.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Sele\u00e7\u00e3o correta de materiais pl\u00e1sticos<\/strong><\/h3>\n<p>A chave para resolver o problema das rebarbas \u00e9 escolher o material pl\u00e1stico correto. Selecione o material de acordo com as carater\u00edsticas e requisitos do produto moldado por inje\u00e7\u00e3o e preste aten\u00e7\u00e3o \u00e0 pureza e ao ponto de fus\u00e3o do material.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Utilizar o material correto<\/strong><\/h3>\n<p>A escolha do material tamb\u00e9m afectar\u00e1 a qualidade da superf\u00edcie do produto. Alguns materiais s\u00e3o propensos a rebarbas, enquanto outros s\u00e3o relativamente menos propensos a produzi-las. Por conseguinte, ao escolher materiais de moldagem por inje\u00e7\u00e3o, considere as carater\u00edsticas e a aplicabilidade do material e escolha os materiais que s\u00e3o menos propensos a produzir rebarbas.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-819 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=\"390\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Thermosetting-Plastics.jpg\" alt=\"\" class=\"wp-image-40738\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Thermosetting-Plastics.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Thermosetting-Plastics-300x195.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>No que diz respeito ao fabrico de moldes, escolher o material de moldagem correto \u00e9 tamb\u00e9m a chave para reduzir as rebarbas. A escolha de alguns bons materiais, tais como materiais resistentes ao desgaste, pode efetivamente reduzir o desgaste da superf\u00edcie do molde e evitar a gera\u00e7\u00e3o de rebarbas.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Ajustar razoavelmente a press\u00e3o de inje\u00e7\u00e3o<\/strong><\/h3>\n<p>Para evitar rebarbas, \u00e9 necess\u00e1rio estabilizar a press\u00e3o de inje\u00e7\u00e3o durante o processo de moldagem por inje\u00e7\u00e3o. Durante o processo de moldagem por inje\u00e7\u00e3o, a press\u00e3o de inje\u00e7\u00e3o deve ser definida razoavelmente de acordo com as propriedades do material pl\u00e1stico e a estrutura do molde para garantir que o pl\u00e1stico flui suavemente.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-820 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\/09\/11-1.jpeg\" alt=\"\" class=\"wp-image-41700\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/11-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/11-1-300x121.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Implementar um processo de moldagem por inje\u00e7\u00e3o normalizado<\/strong><\/h3>\n<p>Antes da moldagem por inje\u00e7\u00e3o, \u00e9 poss\u00edvel controlar a temperatura e a press\u00e3o de inje\u00e7\u00e3o para evitar rebarbas. Para evitar rebarbas, \u00e9 necess\u00e1rio ter um processo de moldagem por inje\u00e7\u00e3o normalizado. Quando se faz moldagem por inje\u00e7\u00e3o, \u00e9 necess\u00e1rio controlar coisas como a temperatura, o tempo de inje\u00e7\u00e3o e a velocidade de inje\u00e7\u00e3o. N\u00e3o se quer fazer nada de errado ou que algo de estranho aconte\u00e7a.<\/p>\n<p>Melhorar a conce\u00e7\u00e3o e o fabrico do molde: Ao melhorar a conce\u00e7\u00e3o e o fabrico do molde, pode produzir menos rebarbas. Primeiro, certifique-se de que o design da sa\u00edda do molde \u00e9 bom para n\u00e3o ter rebarbas. Em segundo lugar, torne o processamento do molde mais preciso, melhore a superf\u00edcie do molde e fa\u00e7a menos rebarbas.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-821 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\/09\/12-1.jpeg\" alt=\"\" class=\"wp-image-41701\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/12-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/12-1-300x169.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Ajustar os par\u00e2metros do processo de moldagem por inje\u00e7\u00e3o<\/strong><\/h3>\n<p>Para reduzir as rebarbas, \u00e9 importante definir par\u00e2metros razo\u00e1veis para o processo de moldagem por inje\u00e7\u00e3o. Pode ajustar a temperatura de moldagem por inje\u00e7\u00e3o, a press\u00e3o de moldagem por inje\u00e7\u00e3o, a velocidade de moldagem por inje\u00e7\u00e3o e outros par\u00e2metros de forma adequada para reduzir as rebarbas na superf\u00edcie do produto. <a href=\"https:\/\/zetarmold.com\/pt\/\" data-type=\"link\" data-id=\"https:\/\/zetarmold.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">processos de moldagem por inje\u00e7\u00e3o<\/a>como a moldagem por inje\u00e7\u00e3o em v\u00e1rias fases, a moldagem por inje\u00e7\u00e3o inversa, etc., para reduzir a gera\u00e7\u00e3o de rebarbas.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Processo de p\u00f3s-processamento<\/strong><\/h3>\n<p>Se houver rebarbas no produto, pode utilizar alguns m\u00e9todos de p\u00f3s-processamento para as remover. Os m\u00e9todos comuns de p\u00f3s-processamento incluem a retifica\u00e7\u00e3o, o polimento, o jato de areia, etc. Atrav\u00e9s destes m\u00e9todos, as rebarbas na superf\u00edcie do produto podem ser eficazmente removidas e a qualidade do produto pode ser melhorada.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-822 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=\"274\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/3-1.jpeg\" alt=\"\" class=\"wp-image-41702\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/3-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/3-1-300x137.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Corte peri\u00f3dico de grandes rebarbas de pl\u00e1stico<\/strong><\/h3>\n<p>Para evitar que as grandes rebarbas causadas por riscos caiam, \u00e9 necess\u00e1rio apar\u00e1-las regularmente com uma l\u00e2mina. Ao mesmo tempo, recomenda-se que se verifique a origem das rebarbas, por exemplo, se as rebarbas s\u00e3o causadas por funcion\u00e1rios que utilizam ferramentas demasiado afiadas para as riscar, ou se as rebarbas s\u00e3o causadas por uma opera\u00e7\u00e3o incorrecta.<\/p>\n<p>As vantagens deste m\u00e9todo s\u00e3o o facto de ser f\u00e1cil de operar e n\u00e3o requerer investimentos especiais, mas o m\u00e9todo de corte \u00e9 ineficiente e n\u00e3o \u00e9 adequado para pequenas rebarbas.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-823 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=\"351\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/3.jpg\" alt=\"\" class=\"wp-image-41706\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/3.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/3-300x176.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Rebarbamento manual<\/strong><\/h3>\n<p>As empresas em geral tamb\u00e9m utilizam este m\u00e9todo, utilizando limas, lixas e cabe\u00e7as de retifica\u00e7\u00e3o como ferramentas auxiliares. O custo da m\u00e3o de obra \u00e9 relativamente elevado, a efici\u00eancia n\u00e3o \u00e9 muito alta e \u00e9 dif\u00edcil remover furos transversais complexos. Os requisitos t\u00e9cnicos para os trabalhadores n\u00e3o s\u00e3o muito altos, e \u00e9 adequado para produtos com pequenas rebarbas e estruturas simples de produtos.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-824 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=\"407\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/Dingtalk_20240905105701.jpg\" alt=\"\" class=\"wp-image-41708\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/Dingtalk_20240905105701.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/Dingtalk_20240905105701-300x204.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Retifica\u00e7\u00e3o e rebarba\u00e7\u00e3o<\/strong><\/h3>\n<p>Este tipo de rebarba\u00e7\u00e3o inclui vibra\u00e7\u00e3o, jato de areia, rolos e outros m\u00e9todos. Os m\u00e9todos atualmente utilizados pelas empresas s\u00e3o os seguintes: Existe o problema de n\u00e3o remover de forma limpa, e as rebarbas restantes podem ter de ser processadas manualmente ou rebarbadas com outros m\u00e9todos. Adequado para pequenos e grandes lotes de produtos.<\/p>\n<figure class=\"wp-block-gallery aligncenter has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"445\" data-id=\"41707\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/7.jpg\" alt=\"\" class=\"wp-image-41707\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/7.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/7-300x223.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/figure>\n<h3 class=\"wp-block-heading\"><strong>Rebarba\u00e7\u00e3o por congela\u00e7\u00e3o<\/strong><\/h3>\n<p>As rebarbas s\u00e3o rapidamente fragilizadas pelo arrefecimento e, em seguida, o proj\u00e9til \u00e9 disparado para remover as rebarbas. O pre\u00e7o do equipamento \u00e9 de cerca de 200.000 a 300.000 yuan. \u00c9 adequado para produtos com paredes finas e pequenos volumes.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-825 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=\"289\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/Dingtalk_20240905105935.jpg\" alt=\"\" class=\"wp-image-41710\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/Dingtalk_20240905105935.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/Dingtalk_20240905105935-300x145.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>Rebarbamento t\u00e9rmico<\/strong><\/p>\n<p>Tamb\u00e9m conhecido como rebarba\u00e7\u00e3o t\u00e9rmica e rebarba\u00e7\u00e3o por explos\u00e3o. Atrav\u00e9s da passagem de um g\u00e1s inflam\u00e1vel para o forno do equipamento e da utiliza\u00e7\u00e3o de determinados meios e condi\u00e7\u00f5es para fazer explodir o g\u00e1s instantaneamente, a energia gerada pela explos\u00e3o \u00e9 utilizada para dissolver e remover as rebarbas.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-826 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\/09\/4.jpg\" alt=\"\" class=\"wp-image-41711\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/4.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/4-300x189.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>O equipamento \u00e9 dispendioso (milh\u00f5es de d\u00f3lares), tem elevados requisitos de tecnologia de funcionamento, baixa efici\u00eancia e grandes efeitos secund\u00e1rios (ferrugem, deforma\u00e7\u00e3o). \u00c9 utilizado principalmente em algumas pe\u00e7as de alta precis\u00e3o, tais como pe\u00e7as de precis\u00e3o para autom\u00f3veis e para a ind\u00fastria aeroespacial.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Rebarba\u00e7\u00e3o qu\u00edmica<\/strong><\/h3>\n<p>Utilizando o princ\u00edpio da rea\u00e7\u00e3o eletroqu\u00edmica, as pe\u00e7as met\u00e1licas s\u00e3o rebarbadas de forma autom\u00e1tica e selectiva. Adequado para rebarbas internas que s\u00e3o dif\u00edceis de remover e pequenas rebarbas (espessura inferior a 7 fios) de produtos como bombas e v\u00e1lvulas.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-827 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=\"262\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/Dingtalk_20240905105637.jpg\" alt=\"\" class=\"wp-image-41713\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/Dingtalk_20240905105637.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/Dingtalk_20240905105637-300x131.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Rebarba\u00e7\u00e3o electrol\u00edtica<\/strong><\/h3>\n<p>Um m\u00e9todo de processamento eletrol\u00edtico que utiliza a eletr\u00f3lise para remover rebarbas de pe\u00e7as met\u00e1licas. O eletr\u00f3lito \u00e9 corrosivo e as pe\u00e7as pr\u00f3ximas das rebarbas tamb\u00e9m ser\u00e3o electrolisadas. A superf\u00edcie perder\u00e1 o seu brilho original e at\u00e9 afectar\u00e1 a precis\u00e3o dimensional.<\/p>\n<p>Ap\u00f3s o rebarbamento, a pe\u00e7a de trabalho deve ser limpa e protegida contra a ferrugem. A rebarba\u00e7\u00e3o electrol\u00edtica \u00e9 adequada para remover rebarbas de orif\u00edcios ocultos ou de pe\u00e7as com formas complexas. \u00c9 adequado para rebarbar engrenagens, bielas, corpos de v\u00e1lvulas, orif\u00edcios do canal de \u00f3leo da cambota e arredondar cantos afiados.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-828 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=\"288\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/2.jpg\" alt=\"\" class=\"wp-image-41715\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/2.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/2-300x144.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Rebarba\u00e7\u00e3o por jato de \u00e1gua de alta press\u00e3o<\/strong><\/h3>\n<p>Utilizando a \u00e1gua como meio, utiliza a for\u00e7a de impacto instant\u00e2nea da \u00e1gua para remover as rebarbas e os flashes gerados ap\u00f3s o processamento e, ao mesmo tempo, atingir o objetivo de limpeza. O equipamento \u00e9 caro e \u00e9 utilizado principalmente no cora\u00e7\u00e3o dos autom\u00f3veis e nos sistemas de controlo hidr\u00e1ulico das m\u00e1quinas de engenharia.<\/p>\n<h2 class=\"wp-block-heading\"><strong>Resumo<\/strong><\/h2>\n<p><strong>Este artigo aborda as causas das rebarbas em produtos moldados por inje\u00e7\u00e3o e as respectivas solu\u00e7\u00f5es. As rebarbas s\u00e3o causadas principalmente por for\u00e7a de aperto insuficiente, ajuste frouxo do molde, deflex\u00e3o do molde, estrutura n\u00e3o razo\u00e1vel, tratamento de superf\u00edcie deficiente, problemas de mat\u00e9ria-prima e controlo inadequado dos par\u00e2metros de moldagem por inje\u00e7\u00e3o.<\/strong><\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-829 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=\"445\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/7-1.jpg\" alt=\"\" class=\"wp-image-41717\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/7-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/09\/7-1-300x223.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>Para resolver estes problemas, recomenda-se melhorar a estrutura e o design do molde, selecionar os materiais adequados, definir razoavelmente a press\u00e3o de inje\u00e7\u00e3o, implementar uma norma <a href=\"https:\/\/zetarmold.com\/pt\/\" data-type=\"link\" data-id=\"https:\/\/zetarmold.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">processo de moldagem por inje\u00e7\u00e3o<\/a>e adotar processos de p\u00f3s-processamento, como a moagem e o polimento.<\/strong><\/p>\n<p><strong>Al\u00e9m disso, atrav\u00e9s da otimiza\u00e7\u00e3o dos par\u00e2metros do processo e do corte regular, o aparecimento de rebarbas pode ser eficazmente reduzido e a qualidade geral das pe\u00e7as moldadas por inje\u00e7\u00e3o pode ser melhorada.<\/strong><\/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":41704,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"What are the Causes and Solutions for Burrs in | ZetarMold","_seopress_titles_desc":"Discover expert insights on causes and solutions burrs injection molded products from ZetarMold. We provide professional injection molding services with DFM","_seopress_robots_index":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[42],"tags":[182,159,186,89,160],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts\/41689"}],"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=41689"}],"version-history":[{"count":0,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts\/41689\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/media\/41704"}],"wp:attachment":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/media?parent=41689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/categories?post=41689"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/tags?post=41689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}