Preparation method of foglight shell of passenger car

A technology for passenger cars and fog lamps, applied in vehicle components, transportation and packaging, optical signals, etc., can solve problems such as poor toughness, high cost, and heavy weight, and achieve poor low-temperature toughness, high-temperature hydrolysis, and reduced The effect of material cost

Inactive Publication Date: 2012-10-17
BAIC MOTOR CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the production process of PBT-GF30 material for passenger car fog lamp housing is relatively mature, there are still some problems: 1) PBT material has poor toughness at low temperature and general fatigue resistance
This causes a certain damage rate in the packaging and assembly process; 2) Although PBT materials have little water absorption, they may be hydrolyzed at high temperatures because they contain ester groups
In addition, there are disadvantages such as heavy weight and relatively high cost, so there is a need for further improvement

Method used

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  • Preparation method of foglight shell of passenger car
  • Preparation method of foglight shell of passenger car

Examples

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preparation example Construction

[0019] The preparation method of the passenger car fog lamp housing of the present invention adopts long glass fiber reinforced polypropylene material to prepare the fog lamp housing, comprising the following steps:

[0020] Step 1: Prepare the raw materials for the injection molded fog lamp housing, specifically:

[0021] Co-extrude after mixing modified polypropylene and glass fiber, so that the polypropylene polymer resin is evenly coated on the outer surface of glass fiber, and then co-extrude modified polypropylene and glass fiber to form long glass fiber reinforced polypropylene The material is cooled and cut to obtain pellets, the pellets are raw materials, the length of the pellets is 10-12mm, and the content of glass fiber is 40%;

[0022] The modified polypropylene is formed by stirring and mixing polypropylene materials, antioxidants, and ultraviolet absorbers, and then melting them, wherein the weight ratio of the modified polypropylene is 100 parts, and the weight...

Embodiment 1

[0030] Example 1: Using long glass fiber reinforced polypropylene to prepare a fog lamp housing

[0031] Step 1: Co-extrude the modified polypropylene and glass fiber after mixing, so that the polypropylene polymer resin is uniformly coated on the outer surface of the glass fiber, and the modified polypropylene and glass fiber are mixed and co-extruded to form a long glass fiber The reinforced polypropylene material is cooled and cut to obtain pellets, the length of which is 12mm; wherein the content of glass fiber is 40%; the modified polypropylene is made of injection molding grade polypropylene and antioxidant, ultraviolet absorber The agent is melted and formed after stirring and mixing, wherein the weight ratio of the injection molding grade polypropylene is 100 parts, the weight ratio of the antioxidant 1010 is 0.3 parts, and the weight ratio of the ultraviolet absorber UV531 is 0.5 parts;

[0032] Step 2: drying the pellets, the drying temperature is 90°C, and the dryin...

Embodiment 2

[0035] Example 2: Using long glass fiber reinforced polypropylene to prepare a fog lamp housing:

[0036] Step 1: Co-extrude the modified polypropylene and glass fiber after mixing, so that the polypropylene polymer resin is uniformly coated on the outer surface of the glass fiber, and the modified polypropylene and glass fiber are mixed and co-extruded to form a long glass fiber The reinforced polypropylene material is cooled and cut to obtain pellets, the length of which is 12mm; wherein the content of glass fiber is 40%; the modified polypropylene is made of injection molding grade polypropylene and antioxidant, ultraviolet absorber The agent is melted and formed after stirring and mixing, wherein the weight ratio of the injection molding grade polypropylene is 100 parts, the weight ratio of the antioxidant 1010 is 1.2 parts, and the weight ratio of the ultraviolet absorber UV531 is 0.8 parts;

[0037] Step 2: drying the pellets, the drying temperature is 90°C, and the dryi...

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Abstract

The invention relates to a preparation method of a foglight shell of a passenger car. The method comprises the steps of co-extruding mixed modified polypropylene and glass fiber and then cooling and cutting to obtain particles, wherein the content of glass fiber in the particles is 40%, the modified polypropylene is prepared by mixing and stirring polypropylene, antioxidant and ultraviolet absorber, and melting, and weight of the polypropylene is 100 parts, weight of the antioxidant is 0.3-1.2 parts and weight of the ultraviolet absorber is 0.5-0.8 parts; drying the particles; placing the particles into a charging barrel of an injection molding machine to melt; injecting the melted particles in sections to a mould for injection moulding; and cooling and demoulding to obtain the foglight shell. According to the method provided by the invention, the weight is lightened, the cost is reduced and the energy consumption in production is saved to a great extent while size, structure and function of the product are met.

Description

technical field [0001] The invention belongs to the field of automobile manufacturing, and relates to a method for preparing a fog lamp housing of a passenger car. Background technique [0002] At present, most of the fog lamp housings of passenger cars are made of plastic materials. Because its application parts have high requirements on heat resistance and mechanical strength, engineering plastics or even special engineering plastics are generally used. Such as: polybutylene terephthalate (PBT), polyetherimide (PEI), etc. At present, the main material used for the fog lamp housing of this type of passenger car on the market is: PBT-GF30. [0003] Although the manufacturing process of PBT-GF30 material for passenger car fog lamp housing is relatively mature, there are still some problems: 1) PBT material has poor toughness at low temperature and general fatigue resistance. This causes a certain damage rate in the packaging and assembly process; 2) Although PBT materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K7/14B29C45/76B60Q1/20
Inventor 杨宇威武胜军周鸿明李向东刘安策
Owner BAIC MOTOR CORP LTD
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