Car Door Handle Plastic Injection Mold

Car door handle assembly of today's mainstream cars is composed of handle base and handle. Handle base is connected to rear trunk lid by screws and buckles. It is main structural part and force-receiving part of body. Some of handle bases are also designed with reversing camera inlet. Car door handle refers to part touched by operator's hand when trunk of car is switched, and is generally assembled on handle base by snap, which requires certain strength, wear resistance and good flexibility. In order to ensure that handle can accurately and reliably hold handle when open door of car is switched, car door handle is designed as thin-walled deep barrel structure, and outer surface is designed with skin pattern.

There are various car door handle plastic injection molds, and different car door handles can be customized according to different needs. At the same time, we can also make some surface treatment on it, like chrome, plating, Anti-UV, anti-aging and so on.

Car door handle plastic injection mold

Car door handle material of car is PP+EPDM-T20, and shrinkage rate is 1.012%. Shrinkage rate of injection material should be considered when designing size of injection mold cavity and core. Corners of plastic parts are rounded and rectangular, and wall thickness is 1.5mm.

Selection of Injection Molding Machines:

Car door handle plastic injection mold are no special requirements for injection machines. Due to the material is PP, it is necessary to use a computer injection machine with high injection pressure and multi-stage control. The clamping force is generally determined by 3800t/m3, and the injection volume is 20%-85%.

Melting Temperature:

The melting point of the modified PP is 160-175 °C, and the decomposition temperature is 350 °C, but the temperature setting cannot exceed 275 °C during injection processing, and the temperature of the melting section is preferably 240 °C.

Car Door Handle Plastic Injection Mold Temperature:

The mold temperature is 50-90 °C. For those with higher size requirements, the high mold temperature is used, and the core temperature is more than 5 °C lower than the cavity temperature.

Injection pressure:

Use higher injection pressure (1500-1800bar) and holding pressure (about 80% of the injection pressure), switch to holding pressure at about 95% of the full stroke, and use a longer holding time.

Injection speed:

In order to reduce internal stress and deformation, high-speed injection should be selected, but some grades of PP and molds are not suitable (bubbles and gas lines appear). Use low speed injection and higher mold temperature.