Injection molding process of plastic product

An injection molding process and product technology, applied in the field of modified injection molding of plastic products, can solve problems such as poor molding quality, and achieve the effects of ensuring removal rate, good mechanical properties, and reducing internal stress

Pending Publication Date: 2021-03-26
圣创实业(深圳)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Injection molding process of plastic product
  • Injection molding process of plastic product

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Embodiment 1

[0035] An injection molding process for plastic products, comprising the following steps:

[0036] S1 raw material pretreatment, select PC and ABS as raw materials, and then dry the raw materials for later use.

[0037] S2 mold pretreatment, firstly clean the surface of the mold cavity, the specific method of cleaning is: first spray the surface of the mold cavity with high-pressure air, and then spray the cleaning agent on the surface of the mold cavity to rinse and clean The agent can be one or more of tetrahydrofuran, trifluoroacetic acid, ethanol, and isopropanol. Considering the safety of the cleaning agent during use and the impact on the environment, since ethanol is safe and non-toxic, and has a low boiling point, To volatilize, so choose ethanol as cleaning agent. After rinsing, the mold is heated, and after the cleaning agent on the surface of the mold cavity is completely evaporated, the surface of the mold cavity is sprayed with high-pressure air again to ensure t...

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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...

Claims

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Application Information

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IPC IPC(8): B29C45/17B29C45/78B29C45/77B29C45/73B29C33/72B29K69/00B29K55/02
CPCB29C45/1753B29C45/78B29C45/77B29C45/73B29C33/722B29C2945/76531B29C2945/76662B29C2945/76498B29C2945/76735B29C2945/76561B29C2945/76595B29K2069/00B29K2055/02
Inventor 梁火荣王丙意杨何
Owner 圣创实业(深圳)有限公司
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