Plastic hanger principle process classification

Time: 2021-04-29 17:49:14

injection molding

The principle of plastic clothes hanger Process classification is a method of manufacturing plastic products. The molten plastic is injected into the mold of the plastic product by pressure, and various plastic parts are obtained by cooling and molding. It is suitable for products with large quantities and high precision. The price of the mold It depends on the specific situation. The resulting shape is often the final product and requires no further processing before installation or use as a final product. Many details, such as bosses, ribs, threads, can be formed in a single injection molding operation.

Injection molding is mostly used for thermoplastics. It is similar to extrusion molding, the difference is that the molten plastic enters the closed mold through the nozzle, and solidifies and forms the product in the mold. Injection molding is made by opening the mold. It has high strength, good color durability and standardized edges and corners. It can make thicker products.


Blister molding is to heat the plastic sheet, pass through the mold, suck the shape of the mold under the action of vacuum, and cool and form it. It is suitable for products with relatively simple structure and small quantity, and the mold is relatively cheap. Its cost is cheaper than injection molding, the output is high, and the mold is also cheaper. Blister molding is mainly used for thin-walled products. The color may change after a long time, but not necessarily. In addition, the output seems to be larger than that of injection molding, and the waste generated by related nozzles and other production is relatively small.

  Blow molding is also called hollow blow molding

  A rapidly developing method of processing plastics. The tubular plastic parison obtained by extrusion or injection molding of thermoplastic resin is placed in the split mold while it is hot (or heated to a softened state), and compressed air is injected into the parison immediately after the mold is closed to blow the plastic parison. It swells and clings to the inner wall of the mold, and after cooling and demoulding, various hollow products can be obtained. The manufacturing process of blown film is very similar in principle to blow molding of hollow products, but it does not use molds. From the perspective of plastic processing technology classification, the forming process of blown film is usually included in extrusion. The blow molding process began to be used to produce low-density polyethylene vials during World War II. Among them, according to the parison production method, blow molding can be divided into extrusion blow molding and injection blow molding, and multi-layer blow molding and stretch blow molding are newly developed.