Injection molding process of plastic product

Abstract

The invention discloses an injection molding process of a plastic product, relates to a material molding technology, and is used for solving the problem of poor molding quality of a common injection molding process. The injection molding process comprises the following steps of pretreating raw materials, namely drying the raw materials; pretreating a mold, specifically, cleaning the surface of a cavity of the mold, and then preheating the mold; melting the raw materials, namely putting the cleaned raw materials into a hopper of an injection molding machine, melting, and injecting into the moldby using a screw extruder; performing pressure maintaining, specifically, continuously injecting the raw materials into the mold to guarantee the pressure in the cavity; cooling and molding, specifically, cooling the mold to cool, solidify and mold the raw materials in the cavity; and demolding, specifically, separating the mold, and pulling off the molded plastic product from the cavity. The injection molding process has the following advantages and effects that the rheological wriggle of the raw materials in the solidification process can be reduced by treating the mold cavity, so that twisted lines are not prone to appearing after the product is formed, and the purpose of improving the forming quality of the product is achieved.

Description

technical field [0001] The invention relates to material forming technology, in particular to a modified injection molding process of plastic products. Background technique [0002] With the in-depth development of petroleum products, many materials with excellent performance have been born, such as PC, ABS and other plastics. These materials have the advantages of good toughness, high strength, and easy molding, so they are widely used in industry. [0003] At present, the Chinese invention patent application publication number CN109262946A discloses a high-gloss injection molding process for energy saving and emission reduction, including: (1) setting injection molding parameters, adding plastic material to the hopper, heating and melting by the first heating mechanism, and the molten material enters the screw; (2) The second heating mechanism heats up, the mobile motor drives the machine base to translate, the injection molding machine moves to the injection port, and the...

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Problems solved by technology

[0004] For plastic products, the injection molding process is usually used for molding. As mentioned above, it is usually produced by means of an injection molding machine. However, after the above-mentioned process is used for production, it is found that the surface of the molded product will appear distorted like the solidification of lava during the flow process. texture, resulting in poor molding quality of the product

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