Free-spraying metallic-luster injection molding process for car interior trim parts and exterior parts

Abstract

The invention discloses a free-spraying metallic-luster injection molding process for car interior trim parts and exterior parts. The free-spraying metallic-luster injection molding process comprises the following steps: adding metal powder into a raw material which is a plastic base material, and arranging a random water path close to a mould cavity of an injection mould with the high surface quality and the small thermal deformation to enable the surface temperature of the mould to be uniform; pouring the mould by adopting a hooked pouring gate, a pin-point gate and a side pouring gate; controlling the temperature of the surface of the mould in an injection-molding process; and pouring by adopting one or more pouring gates by adopting a high-pressure low-speed injection molding technique, a low-pressure high-speed injection molding technique or a normal-pressure normal-speed injection molding technique, and a sequential injection molding process, wherein the pouring gates adopt a needle valve type pouring gates. The parts produced by adopting the free-spraying metallic-luster injection molding process have no flow marks and solution marks on surfaces, have the good metallic luster and can be used for car interior trim parts and exterior parts.

Description

Technical field

[0001] The invention relates to the field of automobile parts manufacturing, in particular to a spray-free metallic luster injection molding process used for automobile interior and exterior parts. technical background

[0002] "Low carbon, environmental protection, energy saving and emission reduction" is one of the important issues of the Twelfth Five-Year Plan. For automakers, considering the use of green materials and processes in the product design and manufacturing phases is important for improving the environmental protection of final products. Sex has a positive meaning. At the same time, due to the increasingly fierce competition of automotive products, the prices of products are gradually decreasing, but the requirements of customers are gradually increasing, so the cost pressure of automobile manufacturers and component suppliers is very high. In response to this situation, automobile manufacturers and component suppliers are actively introducing new s...

Examples

Embodiment 1

[0023] The raw material uses ABS base metal color material. The mold gate uses hook gates. The mold material uses stainless steel that is easy to polish and has small thermal deformation. The mold surface is arranged close to the mold cavity. The mold temperature is used during the injection molding process. The ordinary mold temperature machine controls the mold temperature to 60°C and the cooling water temperature to 25°C. During the injection molding process, the injection speed is 30% and the back pressure is 12 bar.

Embodiment 2

[0025] The raw material uses PC / ABS base metal color material, the mold gate uses point gates, the mold material uses stainless steel that is easy to polish and has small thermal deformation, and the mold surface is arranged close to the mold cavity. The mold temperature during the injection molding process Use a high-pressure water temperature machine to control the mold temperature to 100°C. During the injection molding process, the injection speed is 30% and the back pressure is 8 bar.

Embodiment 3

[0027] The raw material is made of POM base metal color material, the mold gate adopts lap gate, the mold material is stainless steel that is easy to polish and has small thermal deformation, and the mold surface is arranged close to the mold cavity. The mold temperature is used during the injection molding process. High-pressure water vapor controls the mold temperature to 120°C. During the injection molding process, the injection speed is 30% and the back pressure is 8 bar.

Technical field

[0001] The invention relates to the field of automobile parts manufacturing, in particular to a spray-free metallic luster injection molding process used for automobile interior and exterior parts. technical background

[0002] "Low carbon, environmental protection, energy saving and emission reduction" is one of the important issues of the Twelfth Five-Year Plan. For automakers, considering the use of green materials and processes in the product design and manufacturing phases is important for improving the environmental protection of final products. Sex has a positive meaning. At the same time, due to the increasingly fierce competition of automotive products, the prices of products are gradually decreasing, but the requirements of customers are gradually increasing, so the cost pressure of automobile manufacturers and component suppliers is very high. In response to this situation, automobile manufacturers and component suppliers are actively introducing new s...

Examples

Embodiment 1

[0023] The raw material uses ABS base metal color material. The mold gate uses hook gates. The mold material uses stainless steel that is easy to polish and has small thermal deformation. The mold surface is arranged close to the mold cavity. The mold temperature is used during the injection molding process. The ordinary mold temperature machine controls the mold temperature to 60°C and the cooling water temperature to 25°C. During the injection molding process, the injection speed is 30% and the back pressure is 12 bar.

Embodiment 2

[0025] The raw material uses PC / ABS base metal color material, the mold gate uses point gates, the mold material uses stainless steel that is easy to polish and has small thermal deformation, and the mold surface is arranged close to the mold cavity. The mold temperature during the injection molding process Use a high-pressure water temperature machine to control the mold temperature to 100°C. During the injection molding process, the injection speed is 30% and the back pressure is 8 bar.

Embodiment 3

[0027] The raw material is made of POM base metal color material, the mold gate adopts lap gate, the mold material is stainless steel that is easy to polish and has small thermal deformation, and the mold surface is arranged close to the mold cavity. The mold temperature is used during the injection molding process. High-pressure water vapor controls the mold temperature to 120°C. During the injection molding process, the injection speed is 30% and the back pressure is 8 bar.

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