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5 common problems on the surface of TPE products injection molding The surface of TPE products injection molding products must be dried before injection molding if the requirements are strict. Generally, it is 70~80℃/2h for hopper drying or 80~100℃/1h for tray drying. For tray drying, it should be noted that the thickness of material layer is generally not more than 50mm is better. It is recommended to use tray drying. If the surface of the

The influence of injection molding process on the quality of products In the molding process of transforming plastic particles into plastic products, plastic is often subjected to high temperature and pressure, and flows under high shear rate. Different molding conditions and processes will have different effects on the quality of products. If the plastic raw materials are correctly selected, the technical parameters of the injection molding machine and the structure of the mold are in

How To Solve The Sidewall Dents Of Injection Molded Parts “Dent” is caused by the local internal shrinkage after the gate is closed or due to the lack of material injection. Dents or micro-dents on the surface of injection molded products are an old problem in the injection molding process. Dents are generally caused by a local increase in shrinkage due to an increase in the wall thickness of the plastic product, and may occur

How to solve the problem of lusterless surface of plastic parts? What is Lusterless? Low Gloss refers to the lack of gloss on the surface and the low transparency of transparent products. There are many reasons for Lusterless, and some other injection molding defects are also causes of Lusterless. Analysis of surface gloss (Lusterless) defects and elimination methods I. Mold failure As the surface of the plastic part is the reproduction of the mold cavity

What injection molding process parameters need to be adjusted to solve the stress problem? In the molding process of plastic products, any molding factors that can reduce the molecular orientation of the polymer in the product may reduce the orientation stress; but any process conditions that can make the polymer in the product evenly cooled can reduce the cooling internal stress; any processing methods that help plastic products to release from the mold are conducive

Injection molding pre-molding action and back pressure control, do you know? Injection molding pre-molding action options. According to whether the injection seat is backed up before and after pre-molding charging, i.e. whether the nozzle leaves the mold, the injection molding machine generally has three options. Fixed charging: the nozzle is always pressed into the mold before and after pre-molding, and the injection seat does not move. Pre-feeding: The nozzle is pressed against the mold for

Injection system of injection machine The injection system is a part of the injection machine that works in direct contact with the molding material and melt. Its main function is to make the solid molding material plasticize into melt evenly and inject the melt into the mold cavity with sufficient pressure and speed. The injection system includes the charging device, barrel, plunger and diversion cone (plunger injection machine), screw (screw injection machine) and nozzle. (1)

Introduction of three injection molding processes affecting the strength of injection molded parts Injection molding machine (injection molding machine or injection molding machine for short) is the main molding equipment that makes thermoplastic or thermosetting materials into plastic products of various shapes using plastic molding molds. Injection molding is realized through injection molding machines and molds. Here are some injection molding processes that affect the strength of injection molded parts: 1) Increasing the injection pressure