Plastic manufacturing process: high-gloss injection molding

author: Universe plastic

2024-04-22

High-gloss injection molding is a rigorous plastic manufacturing process that produces plastic products with high surface finish and remarkable mirror effects.

High-gloss injection molding is a process optimization and improvement based on ordinary injection molding services, such as: improved molds, high-quality materials, improved injection molding parameters, etc.

The following is a detailed introduction to the content requirements of high-gloss injection molding process by Universe Plastics engineers:

Requirements for mold manufacturing

1. It is recommended to use mold steel with high hardness and high wear resistance as the material for manufacturing molds, such as H13, S136, etc.

2. Precision polishing, electroplating, chrome plating and other treatments are carried out on the mold cavity surface to ensure that the mold cavity is smooth and achieves a mirror effect.

3. Add an efficient temperature control system to the mold, such as a water temperature machine or oil temperature machine, to ensure stable mold temperature and prevent surface defects caused by uneven cooling.

Requirements for injection molding material selection

1. Select materials with higher melt index, such as PP, ABS, PS, etc. with high fluidity, to help the melt evenly fill the mold cavity and reduce surface defects.

2. A certain amount of brightener, silicone oil, paraffin, flow modifier, etc. can be added to further improve the gloss and fluidity of the material.

3. Ensure that the raw materials are dry and pure, without water vapor, foreign matter or impurities.

Requirements for injection molding machines

1. High-gloss injection molding requires the injection molding machine’s clamping force to be evenly distributed to prevent product surface defects caused by uneven clamping force.

2. The injection molding machine must have a high-precision temperature control system to ensure the stability of the melt temperature and mold temperature.

3. The injection molding machine needs to accurately control the injection pressure and holding pressure to avoid surface defects caused by pressure fluctuations.

4. The injection molding machine should have precise injection speed control to ensure that the melt evenly fills the mold cavity and prevents flow marks and surface unevenness.

5. High-quality, high-wear-resistant screws and barrels should be selected to ensure uniform mixing and uniform plasticization of the melt and improve the surface finish of the product.

Requirements for injection molding parameters

1. Appropriately increase the melt temperature to make the melt fluidity better, fully fill the mold cavity, and reduce surface defects of plastic parts.

2. Choose a moderate injection speed and pressure to ensure even melt flow and avoid surface problems caused by too fast or too slow speed.

3. Properly extend the holding time and cooling time to ensure that the product is fully shaped and reduce surface shrinkage and deformation.

Plastic processing after high-gloss injection molding

1. Polish and polish the high-gloss injection molded products to further improve the surface finish and gloss.

2. Paint and spray the surface of the product, and use high-gloss paint to increase the gloss effect of the product.

High-gloss injection molding applications

1. Home appliances: mobile phone casings, tablet computer casings, washing machines, refrigerators, air conditioners and other casings require high-end appearance and high smoothness.

2. Automotive interior parts: dashboards, decorative strips, door panels and other parts that require high gloss and high-end appearance.

3. Cosmetic packaging: Cosmetic bottles, caps and other packaging materials require high gloss and good appearance.

4. High-end daily necessities: high-gloss plastic furniture, decorations, jewelry, toys, etc.

High gloss injection molding service

By adopting high-gloss injection molding technology and methods, the surface gloss of injection molded products can be significantly improved to meet the appearance requirements of high-end products.

Dongguan Universe Plastic Co., Ltd. has more than 15 years of injection molding experience and is able to provide manufacturing services for high-gloss plastic products in various industries.

If you are looking for an injection molding manufacturer that can produce high gloss, please contact us to get free technical samples and quotations.

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