After the sheet is heated to a certain temperature by a plastic blister machine, the plastic sheet is adsorbed to the surface of the model by a vacuum pump to generate negative pressure. After cooling and shaping, the plastic sheet is transformed into a bubble cover or bubble shell of different shapes.
Fold the molding
Compression molding also known as molding or compression molding, compression molding is mainly used for phenolic resin, urea-formaldehyde resin, unsaturated polyester resin thermosetting plastic molding.
Extrusion, also known as extrusion molding, is the use of extrusion machine (extruder) will be heated resin through the mold, extrusion required shape of the product method. Extrusion is also sometimes used in the molding of thermosetting plastics and can be used in the molding of foam plastics. The advantage of extrusion is that it can extrude products of various shapes, with high production efficiency and automatic and continuous production. The disadvantage is that thermosetting plastics can not be widely used in this process, the size of products are prone to deviation.
Injection molding is also known as injection molding. Injection molding is the method of using injection molding machine (or injection machine) to inject thermoplastic melt into the mold under high pressure for cooling and curing. Injection molding can also be used for thermosetting plastics and foam molding. The advantages of injection molding are fast production speed, high efficiency, the operation can be automated, can shape complex parts, especially suitable for mass production. Disadvantages are high cost of equipment and mold, injection molding machine cleaning more difficult.
Fold the blow molding
Blow molding is also called hollow blow molding or hollow molding. Blow molding is a method to make the hot resin mold billet closed in the mold into hollow products with the help of the pressure of compressed air. Blow molding includes two methods: blow molding film and blow molding hollow products. Blow molding can be used to produce film products, all kinds of bottles, barrels, POTS and children's toys.
Fold the calender
Rolling is the resin and various additives after expected treatment (kneading, filtering, etc. Calendering is mainly used for polyvinyl chloride resin molding method, can manufacture film, sheet, plate, artificial leather, floor tiles and other products.
Fold and foam forming
Foaming material (PVC, PE and PS, etc.) to add appropriate foaming agent, so that the plastic microporous structure of the process. Almost all thermosetting and thermoplastics can be made into foam. According to the foaming structure, it can be divided into open-hole foam (most of the pores are connected with each other) and closed-hole foam (most of the pores are separated from each other), which is mainly determined by the manufacturing method (chemical foaming, physical foaming and mechanical foaming).