2023.01.04
plastic molding
Plastic molding processing refers to the process of making finished plastic products from polymers manufactured by synthetic resin manufacturers. Processing methods (usually called primary processing of plastics) include compression molding (compression molding), extrusion molding (extrusion molding), Injection molding (injection molding), blow molding (hollow molding), calendering, etc.
Blister
After the sheet is heated to a certain temperature by a blister machine, the negative pressure generated by the EPS mechanical vacuum pump will absorb the plastic sheet to the surface of the model, and it will be transformed into blisters or blisters of different shapes after cooling and shaping.
compression molding
Compression molding is also called compression molding or compression molding. Compression molding is mainly used for the molding of thermosetting plastics such as phenolic resin, urea-formaldehyde resin, and unsaturated polyester resin.
extrusion
Extrusion molding, also known as extrusion molding, is a method of using an extruder (extruder) to continuously pass heated resin through a mold to extrude products of the desired shape. Extrusion molding is sometimes used in the molding of thermosetting plastics and can be used for foam Plastic molding. The advantage of extrusion molding is that it can extrude products of various shapes of thermosetting foam sheet machines, with high production efficiency, automatic and continuous production; the disadvantage is that thermosetting plastics cannot be processed by this method widely, and the product size is prone to deviation.
injection molding
Injection molding is also known as injection molding. Injection molding is a method of injecting thermoplastic melt into a mold under high pressure by using an injection molding machine (or injection machine) to obtain a product after cooling and solidification. Injection molding can also be used for molding thermosetting plastics and foamed plastics. The advantages of injection molding are fast production speed, high efficiency, automatic operation, and the ability to form parts with complex shapes, which is especially suitable for mass production. The disadvantages are high equipment and mold costs, and difficult cleaning of injection molding machines.
blow molding
Blow molding is also known as hollow blow molding or hollow molding. Blow molding is a method in which the hot resin parison closed in the mold is blown into a hollow product by the pressure of compressed air. Blow molding includes blown film and blown hollow There are two methods for products. Blow molding can be used to produce film products, various bottles, barrels, pots and children’s toys.
calendering
Calendering is to process the resin and various additives into a film or sheet through the gap between two or more calender rolls of the calender that turn in opposite directions after the expected treatment (kneading, filtration, etc.), and then peel it off from the calender roll. , and then cooling and shaping a molding method. Calendering is a molding method mainly used for polyvinyl chloride resin, which can manufacture films, sheets, plates, artificial leather, floor tiles and other products.
foam molding
The process of adding an appropriate foaming agent to the foaming material (PVC, PE, PS, etc.) to make the plastic produce a microporous structure. Almost all thermosetting and thermoplastic plastics can be made into foamed plastics. According to the cell structure, it is divided into open cells Foam plastics (most of the pores are interconnected) and closed-cell foam plastics (most of the pores are separated from each other), which is mainly determined by the manufacturing method (divided into chemical foaming, physical foaming and mechanical foaming).
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