{"id":40950,"date":"2025-06-09T12:08:53","date_gmt":"2025-06-09T04:08:53","guid":{"rendered":"https:\/\/zetarmold.com\/?p=40950"},"modified":"2026-04-09T08:10:31","modified_gmt":"2026-04-09T00:10:31","slug":"ajustar-a-contrapressao-da-moldagem-por-injecao-2","status":"publish","type":"post","link":"https:\/\/zetarmold.com\/pt\/ajustar-a-contrapressao-da-moldagem-por-injecao-2\/","title":{"rendered":"Como ajustar a contrapress\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: How to Adjust Back Pressure <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\/42MJcmPcqhjYOGRfw1jiMf?si=HMDSmi0ZRbylUeIMqmFNeg&#038;utm_source=oembed&#8221;><\/iframe>\n<\/div>\n<\/figure>\n<p>Introdu\u00e7\u00e3o:<strong> A contrapress\u00e3o, tamb\u00e9m conhecida como press\u00e3o de plastifica\u00e7\u00e3o, \u00e9 uma for\u00e7a utilizada para manter a press\u00e3o de inje\u00e7\u00e3o cont\u00ednua durante o processo de moldagem por inje\u00e7\u00e3o. Ocorre principalmente quando o material fundido entra continuamente no cilindro.<\/strong><\/p>\n<p><strong>The pressure in injection molding generated pushes the screw speed backward. Back pressure is the reaction force to the screw\u2019s backward movement. It can slow down the screw\u2019s backward speed to ensure that the molten material is evenly injected into the barrel and fills it completely.<\/strong><\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1066 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\/8-5.jpeg\" alt=\"\" class=\"wp-image-40958\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/8-5.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/8-5-300x169.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>O ajuste correto e a utiliza\u00e7\u00e3o da contrapress\u00e3o podem uniformizar a temperatura de fus\u00e3o, compactar o material fundido e produzir melhores produtos de pl\u00e1stico. Portanto, como ajustar a contrapress\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o, que tipo de contrapress\u00e3o \u00e9 adequada, a moldagem por inje\u00e7\u00e3o Zeatr Mold responder-lhe-\u00e1 uma a uma.<\/strong><\/p>\n<h2 class=\"wp-block-heading\"><strong>Como se forma a contrapress\u00e3o?<\/strong><\/h2>\n<p>Quando o pl\u00e1stico derretido e plastificado, o material derretido continua a mover-se para a extremidade frontal do cilindro (dentro da c\u00e2mara de medi\u00e7\u00e3o), e gradualmente forma uma press\u00e3o para empurrar o parafuso para tr\u00e1s.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1067 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\/zetar6756_httpss.mj_.runGJgb0J_1O30_Injection_molding_chairs_o_29135d9d-3651-46ed-9936-e7b15f9534b3_0.jpg\" alt=\"\" class=\"wp-image-40959\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runGJgb0J_1O30_Injection_molding_chairs_o_29135d9d-3651-46ed-9936-e7b15f9534b3_0.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runGJgb0J_1O30_Injection_molding_chairs_o_29135d9d-3651-46ed-9936-e7b15f9534b3_0-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Para evitar que o parafuso recue demasiado depressa e assegurar que o material fundido seja compactado uniformemente, \u00e9 necess\u00e1ria uma press\u00e3o inversa no parafuso, que impede o parafuso de recuar, designada por contrapress\u00e3o.<\/p>\n<p>A contrapress\u00e3o \u00e9 tamb\u00e9m designada por press\u00e3o de plastifica\u00e7\u00e3o. Esta \u00e9 controlada atrav\u00e9s da regula\u00e7\u00e3o da v\u00e1lvula de estrangulamento do \u00f3leo de retorno do cilindro de inje\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1068 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\/zetar6756_httpss.mj_.run2E3T7eNUZLY_Injection_molding_of_vario_4fa59153-e208-4336-92e8-689ac7a3114f_3-1.jpg\" alt=\"\" class=\"wp-image-40960\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.run2E3T7eNUZLY_Injection_molding_of_vario_4fa59153-e208-4336-92e8-689ac7a3114f_3-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.run2E3T7eNUZLY_Injection_molding_of_vario_4fa59153-e208-4336-92e8-689ac7a3114f_3-1-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>A v\u00e1lvula de contrapress\u00e3o \u00e9 instalada na parte de tr\u00e1s do cilindro de inje\u00e7\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o de parafuso pr\u00e9-plastificante para ajustar a velocidade de descarga do \u00f3leo do cilindro de inje\u00e7\u00e3o quando a rota\u00e7\u00e3o do parafuso recua, de modo a que a press\u00e3o de reten\u00e7\u00e3o do cilindro; a velocidade de recuo do parafuso (resist\u00eancia) do motor completo \u00e9 controlada pela servo-v\u00e1lvula AC.<\/p>\n<h2 class=\"wp-block-heading\"><strong>Onde est\u00e1 a posi\u00e7\u00e3o de ajuste da contrapress\u00e3o?<\/strong><\/h2>\n<p>A v\u00e1lvula de contrapress\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o est\u00e1 normalmente localizada junto \u00e0 v\u00e1lvula de fus\u00e3o. A v\u00e1lvula de contrapress\u00e3o tamb\u00e9m est\u00e1 instalada na parte de tr\u00e1s do cilindro de inje\u00e7\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o de parafuso pr\u00e9-plastificante. A contrapress\u00e3o \u00e9 controlada atrav\u00e9s do ajuste da v\u00e1lvula de acelera\u00e7\u00e3o do \u00f3leo de retorno do cilindro de inje\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1069 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\/zetar6756_httpss.mj_.run5Used6H61-A_Injection_molded_barrels_o_e6e2de41-ce97-4dbf-bd4e-0c7466e9d18f_1.jpg\" alt=\"\" class=\"wp-image-40961\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.run5Used6H61-A_Injection_molded_barrels_o_e6e2de41-ce97-4dbf-bd4e-0c7466e9d18f_1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.run5Used6H61-A_Injection_molded_barrels_o_e6e2de41-ce97-4dbf-bd4e-0c7466e9d18f_1-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h2 class=\"wp-block-heading\"><strong>Que problemas podem ocorrer se a contrapress\u00e3o for demasiado baixa?<\/strong><\/h2>\n<p>Quando a contrapress\u00e3o \u00e9 demasiado baixa, o parafuso recua demasiado depressa e a densidade do material fundido que flui para a extremidade dianteira do cilindro \u00e9 pequena (relativamente solta), ficando mais ar preso.<\/p>\n<p>Isto conduzir\u00e1 a uma m\u00e1 qualidade de plastifica\u00e7\u00e3o, a um volume de inje\u00e7\u00e3o inst\u00e1vel e a grandes altera\u00e7\u00f5es no peso e no tamanho do produto.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1070 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=\"404\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u6c14\u6ce1\u554a-1.jpg\" alt=\"\" class=\"wp-image-39592\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u6c14\u6ce1\u554a-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/07\/\u6c14\u6ce1\u554a-1-300x202.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>A superf\u00edcie do produto ter\u00e1 encolhimento, flores de g\u00e1s, linhas de material frio, brilho irregular e outros fen\u00f3menos negativos. O produto \u00e9 propenso a bolhas, e a periferia e a posi\u00e7\u00e3o \u00f3ssea do produto s\u00e3o propensas a cola insuficiente. A temperatura de fus\u00e3o \u00e9 baixa, a viscosidade \u00e9 alta e o fluxo de fus\u00e3o \u00e9 fraco.<\/p>\n<h2 class=\"wp-block-heading\"><strong>Que problemas podem ocorrer se a contrapress\u00e3o for demasiado elevada?<\/strong><\/h2>\n<p>A press\u00e3o de fus\u00e3o na extremidade frontal do barril \u00e9 muito alta, a temperatura do material \u00e9 alta e a viscosidade diminui. O refluxo do fundido na ranhura do parafuso e o fluxo de vazamento entre o barril e o parafuso aumentam, o que reduzir\u00e1 a efici\u00eancia da plastifica\u00e7\u00e3o (a quantidade de material plastificado por unidade de tempo).<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1071 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\/08\/\u6f0f\u80f6-1.jpg\" alt=\"\" class=\"wp-image-40957\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6f0f\u80f6-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u6f0f\u80f6-1-300x198.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Para os pl\u00e1sticos que n\u00e3o gostam de calor (como o PVC, POM, etc.) ou corantes, a temperatura da fus\u00e3o aumenta e o tempo que demora a aquecer no barril aumenta, e come\u00e7a a decompor-se devido ao calor, ou o corante come\u00e7a a mudar de cor, e a cor\/brilho da superf\u00edcie do produto come\u00e7a a ter mau aspeto.<\/p>\n<p>Se a contrapress\u00e3o for demasiado elevada, o parafuso recuar\u00e1 lentamente e o tempo de retorno do pr\u00e9-pl\u00e1stico ser\u00e1 longo, o que aumentar\u00e1 o tempo de ciclo e reduzir\u00e1 a efici\u00eancia da produ\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1072 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=\"378\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240823133615.jpg\" alt=\"\" class=\"wp-image-40954\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240823133615.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240823133615-300x189.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Se a contrapress\u00e3o for demasiado elevada, a press\u00e3o de fus\u00e3o ser\u00e1 elevada e o bocal ir\u00e1 babar ap\u00f3s a inje\u00e7\u00e3o. Da pr\u00f3xima vez que a inje\u00e7\u00e3o for feita, o material frio no canal de fluxo do canal de inje\u00e7\u00e3o bloquear\u00e1 o canal de inje\u00e7\u00e3o ou aparecer\u00e3o manchas de material frio no produto.<\/p>\n<p>Quando a cerveja \u00e9 moldada, o bocal tem frequentemente fugas de cola devido a uma contrapress\u00e3o excessiva, o que desperdi\u00e7a mat\u00e9rias-primas e provoca a combust\u00e3o do anel de aquecimento junto ao bocal.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1073 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=\"249\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240823133709.jpg\" alt=\"\" class=\"wp-image-40955\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240823133709.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240823133709-300x125.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>O desgaste mec\u00e2nico do mecanismo de pr\u00e9-moldagem e do cilindro do parafuso aumenta.<\/p>\n<h2 class=\"wp-block-heading\"><strong>Quais s\u00e3o os m\u00e9todos de regula\u00e7\u00e3o da contrapress\u00e3o?<\/strong><\/h2>\n<p>Ao produzir uma m\u00e1quina de moldagem por inje\u00e7\u00e3o, o valor de ajuste da contrapress\u00e3o n\u00e3o \u00e9 fixo, normalmente 3-15kg\/cm. Para al\u00e9m da natureza das mat\u00e9rias-primas e da qualidade estrutural do produto, o ajuste da contrapress\u00e3o tamb\u00e9m deve ser efectuado ao longo de todo o processo de produ\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1074 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\/zetar6756_httpss.mj_.rundOI1FsKl6A0_Injection_molding_of_vario_9bca3f9c-0ec7-49e1-9ade-80fb70c64685_2-1.jpg\" alt=\"\" class=\"wp-image-40962\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.rundOI1FsKl6A0_Injection_molding_of_vario_9bca3f9c-0ec7-49e1-9ade-80fb70c64685_2-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.rundOI1FsKl6A0_Injection_molding_of_vario_9bca3f9c-0ec7-49e1-9ade-80fb70c64685_2-1-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Na produ\u00e7\u00e3o, quando o bocal verte cola, baba, a fus\u00e3o decomp\u00f5e-se excessivamente, o produto muda de cor e o material de retorno \u00e9 demasiado lento, considere reduzir adequadamente a contrapress\u00e3o.<\/p>\n<p>When you see little gas flowers, color mixing, shrinkage, and big changes in product size and weight on the surface of the product, you should increase the back pressure. So, you need to adjust the back pressure according to the production status and your own production experience. Here is how to adjust the injection molding back pressure.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1075 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\/zetar6756_httpss.mj_.runh2w0nm-V07s_Injection_molding_of_elect_5d4b99e7-e7a3-480e-8056-93b9dc5d2b4c_3.jpg\" alt=\"\" class=\"wp-image-40963\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runh2w0nm-V07s_Injection_molding_of_elect_5d4b99e7-e7a3-480e-8056-93b9dc5d2b4c_3.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runh2w0nm-V07s_Injection_molding_of_elect_5d4b99e7-e7a3-480e-8056-93b9dc5d2b4c_3-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Definir o valor m\u00ednimo da contrapress\u00e3o<\/strong><\/h3>\n<p>Antes de come\u00e7ar a ajustar a contrapress\u00e3o, ajuste a contrapress\u00e3o para o valor m\u00ednimo. Ajustar a contrapress\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o para o valor m\u00ednimo e abrir o molde para inje\u00e7\u00e3o. Se o produto n\u00e3o apresentar defeitos \u00f3bvios, isso significa que a contrapress\u00e3o m\u00ednima \u00e9 suficiente.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Aumentar gradualmente a contrapress\u00e3o<\/strong><\/h3>\n<p>Continuar a aumentar a contrapress\u00e3o a partir da contrapress\u00e3o m\u00ednima, e o n\u00famero de produtos injectados continuar\u00e1 a aumentar. Prestar aten\u00e7\u00e3o \u00e0 exist\u00eancia de defeitos, como amolgadelas e rebarbas na superf\u00edcie do produto, e ajustar a contrapress\u00e3o at\u00e9 a superf\u00edcie do produto ficar lisa e sem defeitos.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1076 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\/zetar6756_httpss.mj_.runk5Wo3vf8AS0_Injection_molding_of_vario_5b7b679b-dce8-44a8-8005-6c359163d791_2.jpg\" alt=\"\" class=\"wp-image-40964\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runk5Wo3vf8AS0_Injection_molding_of_vario_5b7b679b-dce8-44a8-8005-6c359163d791_2.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runk5Wo3vf8AS0_Injection_molding_of_vario_5b7b679b-dce8-44a8-8005-6c359163d791_2-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Testar o desempenho do produto<\/strong><\/h3>\n<p>Quando tiver terminado de ajustar a contrapress\u00e3o, deve testar o desempenho do produto que est\u00e1 a fabricar. Vai querer testar coisas como resist\u00eancia \u00e0 tra\u00e7\u00e3o, resist\u00eancia ao desgaste, resist\u00eancia \u00e0 press\u00e3o e assim por diante. Se o produto tiver o desempenho desejado, o ajuste da contrapress\u00e3o est\u00e1 conclu\u00eddo.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Alterar o valor da defini\u00e7\u00e3o da contrapress\u00e3o<\/strong><\/h3>\n<p>Ao ajustar a contrapress\u00e3o, come\u00e7ar com um valor baixo e aument\u00e1-lo gradualmente. Observar as altera\u00e7\u00f5es de qualidade do produto ap\u00f3s cada ajuste at\u00e9 atingir o melhor estado. Ao ajustar a contrapress\u00e3o, n\u00e3o a ajuste demasiado de uma s\u00f3 vez para evitar afetar a qualidade do produto.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1077 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\/08\/\u5f00\u6a21.jpg\" alt=\"\" class=\"wp-image-40909\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5f00\u6a21.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u5f00\u6a21-300x187.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Quando fazemos moldagem por inje\u00e7\u00e3o, temos de observar as altera\u00e7\u00f5es no valor da contrapress\u00e3o em tempo real, de modo a ajust\u00e1-lo a tempo. Em circunst\u00e2ncias normais, o valor da contrapress\u00e3o deve ser ligeiramente inferior ao valor predefinido, para que o princ\u00edpio da exaust\u00e3o possa ser seguido. Se o valor da contrapress\u00e3o for demasiado elevado, pode causar rugas, danos e outros defeitos na superf\u00edcie da pe\u00e7a.<\/p>\n<p>Quando est\u00e1 a fabricar material, tem de estar sempre a ajustar a contrapress\u00e3o porque a temperatura do pl\u00e1stico, a temperatura do molde e a temperatura ambiente est\u00e3o sempre a mudar. Antes de come\u00e7ar a fabricar material, deve fazer uma tabela que lhe diga qual \u00e9 a melhor contrapress\u00e3o para cada coisa que est\u00e1 a fabricar. Depois, pode olhar para a tabela e saber para onde ajustar a contrapress\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1078 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\/13-1.jpeg\" alt=\"\" class=\"wp-image-40910\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/13-1.jpeg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/13-1-300x200.jpeg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Em primeiro lugar, \u00e9 necess\u00e1rio encontrar a interface de configura\u00e7\u00e3o relevante para o controlo da contrapress\u00e3o na interface homem-m\u00e1quina da m\u00e1quina de moldagem por inje\u00e7\u00e3o e, em seguida, configur\u00e1-la. Ao definir, deve primeiro compreender quanta contrapress\u00e3o precisa, e pode consider\u00e1-la de forma abrangente com base na forma da pe\u00e7a e nas carater\u00edsticas do material.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Ajustar a velocidade de resposta da m\u00e1quina de moldagem por inje\u00e7\u00e3o<\/strong><\/h3>\n<p>Outro passo importante \u00e9 ajustar a velocidade de resposta. Quando se altera a defini\u00e7\u00e3o da contrapress\u00e3o, a m\u00e1quina ter\u00e1 alguns atrasos no seu funcionamento, o que afectar\u00e1 diretamente a estabilidade e a precis\u00e3o da contrapress\u00e3o. Assim, \u00e9 necess\u00e1rio reduzir este atraso, ajustando a rapidez de resposta do sistema de controlo.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1079 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=\"271\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u7535\u52a8\u6ce8\u5851\u673a\uff1a.jpg\" alt=\"\" class=\"wp-image-40824\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u7535\u52a8\u6ce8\u5851\u673a\uff1a.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/\u7535\u52a8\u6ce8\u5851\u673a\uff1a-300x136.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Ajustar a contrapress\u00e3o de acordo com a pe\u00e7a moldada por inje\u00e7\u00e3o<\/strong><\/h3>\n<p>Ajustar a contrapress\u00e3o de acordo com os defeitos do produto: Se existirem defeitos como rebarbas, poros, deforma\u00e7\u00f5es e acabamento superficial insuficiente no produto, estes podem ser resolvidos atrav\u00e9s do ajuste da contrapress\u00e3o. De um modo geral, o aumento do valor da contrapress\u00e3o pode resolver defeitos superficiais, enquanto a redu\u00e7\u00e3o do valor da contrapress\u00e3o pode resolver defeitos internos.<\/p>\n<p>Ajustar o tamanho da contrapress\u00e3o de acordo com as propriedades e requisitos do produto moldado por inje\u00e7\u00e3o: De um modo geral, quanto maior for a contrapress\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o, melhor ser\u00e1 a qualidade do produto moldado por inje\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1080 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\/zetar6756_httpss.mj_.runonKvqMbIZNU_Small_Mechanical_Parts_GEN_f06f5397-69d5-4c67-825e-955c87376780_0.jpg\" alt=\"\" class=\"wp-image-40965\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runonKvqMbIZNU_Small_Mechanical_Parts_GEN_f06f5397-69d5-4c67-825e-955c87376780_0.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runonKvqMbIZNU_Small_Mechanical_Parts_GEN_f06f5397-69d5-4c67-825e-955c87376780_0-300x189.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Mas uma contrapress\u00e3o excessiva conduzir\u00e1 a uma redu\u00e7\u00e3o da efici\u00eancia da produ\u00e7\u00e3o e ao desperd\u00edcio de mat\u00e9rias-primas. Por conseguinte, \u00e9 necess\u00e1rio ajustar adequadamente a dimens\u00e3o da contrapress\u00e3o de acordo com a situa\u00e7\u00e3o espec\u00edfica do produto moldado por inje\u00e7\u00e3o.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Ajustar a contrapress\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o<\/strong><\/h3>\n<p>Quanto maior for a contrapress\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o, maior ser\u00e1 a contrapress\u00e3o. Assim, ao ajustar a contrapress\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o, \u00e9 poss\u00edvel ajustar a contrapress\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1081 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=\"203\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807144601.jpg\" alt=\"\" class=\"wp-image-40608\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807144601.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807144601-300x102.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Alterar a velocidade de contrapress\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o. Quanto mais r\u00e1pida for a velocidade de contrapress\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o, maior ser\u00e1 a contrapress\u00e3o. Assim, ao alterar a velocidade da contrapress\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o, pode ajustar a contrapress\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Determinar o tamanho da contrapress\u00e3o de acordo com o pl\u00e1stico<\/strong><\/h3>\n<p>Escolha o tamanho da contrapress\u00e3o com base no tipo de pl\u00e1stico: Pl\u00e1sticos diferentes t\u00eam requisitos de contrapress\u00e3o diferentes. Em geral, os pl\u00e1sticos com pontos de fus\u00e3o baixos necessitam de menos contrapress\u00e3o, enquanto os pl\u00e1sticos com pontos de fus\u00e3o elevados necessitam de mais contrapress\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1082 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=\"496\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runHVCazMJh2JU__a_blue_part_in_front_of_o_25834677-faff-4fa0-b830-4217c229b3d4_1-1.jpg\" alt=\"\" class=\"wp-image-40966\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runHVCazMJh2JU__a_blue_part_in_front_of_o_25834677-faff-4fa0-b830-4217c229b3d4_1-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runHVCazMJh2JU__a_blue_part_in_front_of_o_25834677-faff-4fa0-b830-4217c229b3d4_1-1-300x248.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Por isso, \u00e9 necess\u00e1rio ajustar a contrapress\u00e3o com base no tipo espec\u00edfico de pl\u00e1stico que se est\u00e1 a utilizar na moldagem por inje\u00e7\u00e3o.<\/p>\n<p>Eis como descobrir qual a contrapress\u00e3o a utilizar com base no tipo e na cor do pl\u00e1stico que est\u00e1 a utilizar: Diferentes tipos e cores de pl\u00e1stico necessitam de diferentes defini\u00e7\u00f5es de contrapress\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1083 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\/zetar6756_httpss.mj_.runrivYKCu_IUI_Injection_molding_of_vario_75f8df7f-4a4e-4276-8a68-e2e4023c4c02_2-1.jpg\" alt=\"\" class=\"wp-image-40967\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runrivYKCu_IUI_Injection_molding_of_vario_75f8df7f-4a4e-4276-8a68-e2e4023c4c02_2-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runrivYKCu_IUI_Injection_molding_of_vario_75f8df7f-4a4e-4276-8a68-e2e4023c4c02_2-1-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Se n\u00e3o definir corretamente o valor da contrapress\u00e3o, isso causar\u00e1 encolhimento, deforma\u00e7\u00e3o e outros problemas na sua pe\u00e7a. Regra geral, os materiais transparentes ou brilhantes t\u00eam valores de contrapress\u00e3o mais elevados, enquanto os materiais n\u00e3o transparentes ou mate requerem valores de contrapress\u00e3o mais baixos.<\/p>\n<h3 class=\"wp-block-heading\"><strong>Ajustar a temperatura do molde<\/strong><\/h3>\n<p>A temperatura do molde \u00e9 um dos factores importantes que afectam o tamanho da contrapress\u00e3o. Ao ajustar a contrapress\u00e3o, pode ajustar primeiro a temperatura do molde e, em seguida, efetuar as modifica\u00e7\u00f5es correspondentes com base no efeito da contrapress\u00e3o ajustada.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1084 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=\"421\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807152344.jpg\" alt=\"\" class=\"wp-image-40625\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807152344.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/Dingtalk_20240807152344-300x211.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"><strong>Ajustar a regula\u00e7\u00e3o da press\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o<\/strong><\/h3>\n<p>A regula\u00e7\u00e3o da press\u00e3o da m\u00e1quina de moldagem por inje\u00e7\u00e3o tamb\u00e9m afecta a dimens\u00e3o da contrapress\u00e3o. De um modo geral, uma defini\u00e7\u00e3o de press\u00e3o mais elevada requer uma contrapress\u00e3o mais elevada e uma defini\u00e7\u00e3o de press\u00e3o mais baixa requer uma contrapress\u00e3o mais baixa.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1085 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\/zetar6756_httpss.mj_.runXtM6Ot8DygM_A_modern_factory_with_a_hi_29cd223c-9281-40c4-87b7-6be67e4a6230_2-1.jpg\" alt=\"\" class=\"wp-image-40629\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runXtM6Ot8DygM_A_modern_factory_with_a_hi_29cd223c-9281-40c4-87b7-6be67e4a6230_2-1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runXtM6Ot8DygM_A_modern_factory_with_a_hi_29cd223c-9281-40c4-87b7-6be67e4a6230_2-1-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Ao regular a contrapress\u00e3o, pode come\u00e7ar por regular a regula\u00e7\u00e3o da press\u00e3o do <a href=\"https:\/\/zetarmold.com\/pt\/\" data-type=\"link\" data-id=\"https:\/\/zetarmold.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">moldagem por inje\u00e7\u00e3o<\/a> A m\u00e1quina de moldagem por inje\u00e7\u00e3o \u00e9 um sistema de controlo de press\u00e3o que permite ajustar a press\u00e3o de inje\u00e7\u00e3o de forma adequada e, em seguida, efetuar as modifica\u00e7\u00f5es correspondentes com base no efeito da contrapress\u00e3o ajustada. Al\u00e9m disso, as defini\u00e7\u00f5es de press\u00e3o de moldagem por inje\u00e7\u00e3o come\u00e7am normalmente com as defini\u00e7\u00f5es da unidade de inje\u00e7\u00e3o e da press\u00e3o.<\/p>\n<h2 class=\"wp-block-heading\"><strong>Quais s\u00e3o as vantagens de ajustar corretamente a contrapress\u00e3o?<\/strong><\/h2>\n<p>Pode comprimir o material fundido no tambor, aumentar a densidade e melhorar a estabilidade do volume de inje\u00e7\u00e3o, peso e tamanho do produto.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1086 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\/zetar6756_httpss.mj_.runmuGfiNNZig0_Injection_molding_of_mobil_131781b8-cfa3-4883-8040-cb70c9b02e94_3.jpg\" alt=\"\" class=\"wp-image-40968\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runmuGfiNNZig0_Injection_molding_of_mobil_131781b8-cfa3-4883-8040-cb70c9b02e94_3.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runmuGfiNNZig0_Injection_molding_of_mobil_131781b8-cfa3-4883-8040-cb70c9b02e94_3-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Pode \"espremer\" o g\u00e1s no material fundido, reduzir as flores de g\u00e1s e as bolhas internas na superf\u00edcie do produto e melhorar a uniformidade do brilho. Diminuir a velocidade de recuo do parafuso para plastificar totalmente o material fundido no barril, aumentar a uniformidade de mistura do p\u00f3 de cor, masterbatch e material fundido, e evitar o fen\u00f3meno de \"cor mista\" no produto.<\/p>\n<p>Diminuir a velocidade de recuo do parafuso para plastificar totalmente o material fundido no barril, aumentar a uniformidade de mistura do p\u00f3 de cor, masterbatch e material fundido e evitar o fen\u00f3meno de \"cor mista\" no produto.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1087 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\/zetar6756_Injection_molding_of_various_medical_test_tubes_of__fb9fb127-4e45-496c-9ee0-32729e5f497f_0.jpg\" alt=\"\" class=\"wp-image-40969\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_Injection_molding_of_various_medical_test_tubes_of__fb9fb127-4e45-496c-9ee0-32729e5f497f_0.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_Injection_molding_of_various_medical_test_tubes_of__fb9fb127-4e45-496c-9ee0-32729e5f497f_0-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>O aumento correto da contrapress\u00e3o pode melhorar o encolhimento da superf\u00edcie do produto e o fluxo de cola \u00e0 volta do produto.<\/p>\n<p>Pode aumentar a temperatura do material fundido, melhorar a qualidade de plastifica\u00e7\u00e3o do material fundido, melhorar a fluidez do material fundido ao encher o molde, e n\u00e3o h\u00e1 marca de cola fria na superf\u00edcie do produto.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1088 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\/zetar6756_a_bag_of_orange_and_black_plastic_parts_in_the_styl_94904883-ff0a-4850-8499-3ffec9243cf5_1.jpg\" alt=\"\" class=\"wp-image-40970\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_a_bag_of_orange_and_black_plastic_parts_in_the_styl_94904883-ff0a-4850-8499-3ffec9243cf5_1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_a_bag_of_orange_and_black_plastic_parts_in_the_styl_94904883-ff0a-4850-8499-3ffec9243cf5_1-300x189.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>\u00c9 bom retirar o g\u00e1s do barril e reduzir as flores de g\u00e1s e as bolhas na superf\u00edcie do produto; abrandar a velocidade de recuo do parafuso para plastificar totalmente o material fundido no barril;<\/p>\n<p>Aumentar corretamente a contrapress\u00e3o para melhorar o encolhimento da superf\u00edcie do produto (aplic\u00e1vel a moldes e produtos sem portas de v\u00e1lvulas sequenciais).<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1089 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\/zetar6756_httpss.mj_.runGFCo_eRXNXg_Injection_molding_of_compu_6386646c-bd2f-4d71-b82f-965ba4c3e033_1.jpg\" alt=\"\" class=\"wp-image-40971\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runGFCo_eRXNXg_Injection_molding_of_compu_6386646c-bd2f-4d71-b82f-965ba4c3e033_1.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runGFCo_eRXNXg_Injection_molding_of_compu_6386646c-bd2f-4d71-b82f-965ba4c3e033_1-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Pode aquecer o material fundido, torn\u00e1-lo mais fundido e fazer com que o material fundido flua melhor quando entra no molde.<\/p>\n<h2 class=\"wp-block-heading\"><strong>Conclus\u00e3o<\/strong><\/h2>\n<p>Em suma, o ajuste correto da contrapress\u00e3o das m\u00e1quinas de moldagem por inje\u00e7\u00e3o pode melhorar a qualidade da moldagem por inje\u00e7\u00e3o e a efici\u00eancia da produ\u00e7\u00e3o, reduzir a taxa de refugo e o custo de produ\u00e7\u00e3o.<\/p>\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1090 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\/zetar6756_httpss.mj_.runGXZ4xOOmo-k_plastic_injection_molding__b9c89543-9219-4928-9205-13cc1e200da8_0.jpg\" alt=\"\" class=\"wp-image-40972\" srcset=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runGXZ4xOOmo-k_plastic_injection_molding__b9c89543-9219-4928-9205-13cc1e200da8_0.jpg 600w, https:\/\/zetarmold.com\/wp-content\/uploads\/2024\/08\/zetar6756_httpss.mj_.runGXZ4xOOmo-k_plastic_injection_molding__b9c89543-9219-4928-9205-13cc1e200da8_0-300x168.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<p>Por conseguinte, durante o <a href=\"https:\/\/zetarmold.com\/pt\/\" data-type=\"link\" data-id=\"https:\/\/zetarmold.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">moldagem por inje\u00e7\u00e3o<\/a> processo de fabrico, temos de nos ajustar de acordo com a situa\u00e7\u00e3o espec\u00edfica e encontrar o melhor m\u00e9todo de ajuste da contrapress\u00e3o para obter o melhor efeito 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":40966,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"How to Adjust Back Pressure Injection Molding? | ZetarMold","_seopress_titles_desc":"Discover expert insights on adjust back pressure 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":[215,135,186,187],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts\/40950"}],"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=40950"}],"version-history":[{"count":0,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/posts\/40950\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/media\/40966"}],"wp:attachment":[{"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/media?parent=40950"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/categories?post=40950"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zetarmold.com\/pt\/wp-json\/wp\/v2\/tags?post=40950"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}