A waste secondary molding process for foaming molding of plastic products

By combining a movable seat and an edge-tracing structure with an angle-locking component, the problem of difficult edge trimming of parting lines in the foaming molding of plastic products is solved, achieving efficient and precise edge trimming and waste recycling.

CN122401740APending Publication Date: 2026-07-17SICHUAN JUXIONG PLASTIC TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN JUXIONG PLASTIC TECHNOLOGY CO LTD
Filing Date
2026-06-17
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In the existing technology, when plastic products are foamed and molded, parting lines are formed at the mold closing surface, which makes it difficult to trim the edges of quadrilateral plastic products. Moreover, the existing equipment has poor adaptability and is prone to problems of missing or over-trimming.

Method used

Employing a movable seat, tracing structure, and angle locking components, and combining segmented temperature control mode and rapid cooling system with a trimming machine, it achieves an efficient integration of injection molding and trimming, precisely trimming and collecting trimming waste for secondary molding.

Benefits of technology

It enables precise trimming of quadrilateral plastic products, is highly adaptable, reduces operational difficulty, and allows waste materials to be recycled, thus avoiding resource waste and environmental pollution.

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Abstract

本发明涉及塑料成型技术领域,并公开了一种用于塑料制品发泡成型的废料二次成型工艺,包括S1、选取热塑性树脂原料,搭配发泡剂、基础成核剂,按预设配比混合均匀,并送入热风循环干燥箱,控制原料含水率,避免后续成型产生气泡缺陷;S2、将预处理后的原料送入注塑模块,采用分段控温模式塑化。该用于塑料制品发泡成型的废料二次成型工艺,能够有效地解决现有技术中,塑料制品发泡成型时,原料经注塑机塑化后挤入模具腔体内,待固化定型后开模取件,模具合模面处会不可避免地形成分型线,而目前行业内裁切修边环节所用设备大多仅适用于正圆形产品,适应性差,无法对四边形塑料制品的轮廓进行修边,转角处易出现漏修、多修的问题。
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