Plastic materials for automobile headlights Headlights are an indispensable component of automobiles, which are related to lighting, signaling and decoration of automobiles. After years of development, degree of plasticization of headlight production has reached more than 96%. Main components of automobile headlights are composed of reflectors, lenses, shells, light sources, electronic circuits, and installation accessories. At present, main plastic materials used in automobile headlights in my country are PC, PP, ABS, PC/ABS, PMMA, PBT, PET, PA, BMC and a few other plastic materials. Plastics have advantages of light weight, corrosion resistance, good impact resistance, high transparency, good insulation, low thermal conductivity, good mechanical properties, strong plasticity, and molding processing. They are increasingly widely used in various fields.
Category: plastic parts
American airbag cover mold
Breast shields are composed of complex curved surfaces. Outer surface requirements are high, there must be a smooth transition between different curved surfaces. There are flat cover, horn cover, and circular cover structures. These three structures are connected through middle circular tubular structure and have different opening directions, as shown in Figure 1. Core of trumpet cover and core of central round tube of plastic part are integrated into one piece, side surfaces of flat cover are connected to central round tube of plastic part, and cores of the two are connected by insertion. Bottom of circular cover is connected to circular pipe in the middle of plastic part through a section of circular pipe. There are 4 buckles evenly distributed on inner wall of circular cover. These 4 buckles need to be demoulded using an inclined push mechanism.
Weld marks are an important factor affecting quality of plastic parts. Research has found that under same process conditions, strength of weld line area is only 10-92% of original material, seriously affecting normal use of injection molded products. For example, in automobile industry, unqualified plastic parts directly lead to a decline in automobile quality and even endanger people's lives. Therefore, it is of great practical significance to study formation process and influencing factors of weld marks, find ways to eliminate weld marks.
Medical polypropylene plastic has advantages of high purity, non-toxicity, non-irritation, good chemical stability, no degradation, no inflammation, non-allergic reaction, good biocompatibility, non-carcinogenicity, non-hemolysis and non-coagulation, and can withstand ethylene oxide sterilization treatment. This material not only has good mechanical properties, but also has excellent impact resistance and wear resistance, good dimensional stability and insulation.
This article mainly introduces problems that arise during mold opening, mold trial and mass production processes after design of plastic parts is completed. It also provides a general understanding of how to solve them. Details are as follows;
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Product structure of automobiles is generally complex, and mold structure is diverse. Let me share with you a classic structure of rear mold oblique slider:
This article mainly introduces problems that arise during mold opening, mold trial and mass production processes after design of plastic parts is completed. It also provides a general understanding of how to solve them. Details are as follows, mainly following points:
In addition to spraying UV paint on the surface of car headlight mask (transparent PC material), most of inner surface is now sprayed with a layer of anti-fog paint, mainly to prevent headlights from fogging. Its role and mechanism are as follows:
Gud Mould 