How are automotive injection molded parts produced?

Resin is an important raw material for making plastics, and the performance of automotive injection molded parts is mainly determined by resin. Resin is a polymer compound formed by polymerization of monomers. Plastic is made of resin as the main component, adding a certain amount of additives, heating and melting, filling the mold under a certain temperature and pressure, and then cooling and demoulding. Under the conditions of use, it can adhere to a product of a predetermined shape.

There are many kinds of additives used in the production of automobile injection molded parts, including heat stabilizers, antioxidants, ultraviolet absorbers, light stabilizers, plasticizers, mold release agents, fillers (fillers), reinforcing agents, toughening agents, processing Modifier, nucleating agent, crosslinking agent, compatibilizer, antistatic agent, coupling agent, flame retardant, smoke suppressant, foaming agent, colorant, etc. Additives endow processing functions, technological functions and special functions. The raw materials used in the production of automotive injection molded parts are often not in the form of resin and additives alone, but in the form of special materials after mixing, dispersing, melting, and granulating the two. Resins in special materials generally refer to their homopolymers and copolymers, or functional materials modified by polymer chemical reactions, blends or polymer alloys of two or more polymer compounds (generally adding a compatibilizer ).

The whole production process of automobile injection molded parts includes three parts: monomer production (consisting of materials and monomers), resin production (polymerization of monomers into resin) and plastic molding processing (plastic products made of resin through molding processing) . As far as automotive injection molding manufacturers are concerned, it is to choose suitable resins and additives (more often, to choose suitable materials for molding, that is, special materials), and to use reasonable molding equipment, molding molds and molding processing techniques to produce qualified products. Products, and then enter the category of sales, supply to car manufacturers and car users. In order to achieve sales, the performance/credit ratio is very important. Performance refers to the physical performance, formability and environmental adaptability of the product, that is, value = performance / price = (environmental adaptability of price formability) / price. Nowadays, environmental protection is getting more and more attention. Even if the physical properties are good, if the formability is poor, especially for products with environmental adaptability, the value will become a big problem.

In terms of environmental adaptability, in addition to the generation, management, recycling and regeneration of waste gas, waste liquid and waste in the process of resin production and product molding, the recycling and utilization of products after use deserves more attention.

The physical properties of the product are the key to determine its use value. In addition to being related to molding processing, it depends to a greater extent on the inherent functions of the resin. For automotive injection molding manufacturers, it is very important to master the types and functions of resins.

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