Quality Requirements For Injection Molds For Automotive Lamps

The rapid development of the automotive industry has put forward higher and higher requirements for automotive lighting systems, and the quality of automotive lighting is good.
Damage is very important to driving safety. Therefore, laws and regulations of various countries have strict requirements on automobile lighting. Car lamps not only need
Meet the safety requirements of regulations, but also meet the aerodynamic requirements, beautiful and practical appearance, so that the driver and passengers
Experience comfort. At present, the design and processing technology of car lights is also changing with the development of the automobile industry [1].
Halogen lamps began to be used in automobiles in the 1970s. After the 1990s, xenon lamps had high brightness and longevity.
Longer life, more energy-saving and popular, and in recent years LED lights as the new favorite of car lights have begun to be favored by mid-to-high-end cars. New LED
The lamp has high brightness, small size, fast response, good stability, long life, energy saving and environmental protection. Light guide technology is
Based on the use of LED light source, it is mainly used in daytime running lights to improve the identification of the vehicle during driving.
Ensure traffic safety, and improve the viewing of the lights. Due to the high cost, few car lights will fully adopt LED,
Instead, the light guide is used to replace the lighting method that originally required the arrangement of most LED particles to realize the lamp function, which can reduce
Reduce the number of LED light sources used, and improve the luminous flux utilization of LED light sources [2]. Light guide as indirect lighting of LED
It does not require vacuum coating or reflector design, which simplifies the manufacturing process. Light guide material is transparent engineering
Plastic is formed by injection molding, so it is small in size, light in weight, and has various shapes and personality, and it is easy to realize the beautiful appearance of the car
Sexual requirements.
LED car light guides have extremely high requirements for appearance quality, processing accuracy and optical performance. The product must be free of bubbles, no dents,
No sink marks, no flow lines, and strict transparency, thermal stability, haze, shape accuracy, surface gloss, etc.
Claim. However, as a thick-walled transparent plastic part, it is easier to produce shrinkage, deformation, depression,
Bubbles, flow marks, residual stress, yellowing, black spots and other defects will seriously affect the quality of the product. Car light guide light
It is difficult to improve product quality due to technical difficulties in production, which also affects its mass production, becoming a domestic and foreign automotive lamp manufacturer
Strive to study the key points to overcome.
For many defects in the molding process of plastic products, the most economical and quick solution is to adjust the injection
Plastic process, however, repeated adjustment of process parameters for test molds has seriously increased the cost and prolonged the production cycle, so
How to quickly find the best injection molding process parameters, get high-quality plastic products, improve production efficiency and reduce costs,
Has important research value and significance