The parts with high requirements on the appearance of the car are the lights, so the design and manufacture of car light moulds are extremely demanding. The main parts that make up the front and rear lights of the car are: left and right lenses, left and right decorative frames, left and right lamp housings, and left and right reflectors.
Appearance requirements of car headlight products:
(1) Lens: The product is a transparent part with a pattern on the inner side, and the appearance requirements are high.
(2) Decorative frame: The appearance of the product is plated with aluminum, and some areas need to be frosted.
(3) Lamp housing: The product is an internal functional part, and the assembly requirements such as the lamp head hole and the rear cover hole are high.
(4) Reflector: The product is an electroplated part, with strict light distribution requirements, and the appearance surface is aluminized.
Summary of Automotive Headlamp Lens Mold Technology
The lateral core-pulling mechanism is an important main structure of the mold. The mold cleverly adopts the inner core-pulling mechanism of "T-slot guide block + oblique inward slider", which successfully solves the problem that the lateral parting of transparent parts is left on the surface of plastic parts. trace problem.
The mold adopts a common gating system and is fed by a fan-shaped gate tower. Compared with the previous hot runner gating system, it not only greatly reduces the cost, but also has a better light transmittance of the lamp lens.
The mold adopts a combined cooling system of "vertical cooling water pipe + inclined cooling water pipe + spacer-type water well". The water channel is arranged along the cavity, and the molding cycle is successfully controlled within 35 seconds, which effectively ensures the accuracy of the plastic parts and the labor of the mold. productivity.
The plastic parts are pushed out by push blocks, which are not only smooth but also leave no traces on the appearance.
Since the car parts mould was released from production, the operation has been stable and smooth, and all the quality indicators of the plastic parts have met the design requirements. It is a successful example of the design of large, complex, and long-life injection molds.