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Author: MULAN –Plastic Molding Manufacturer
Among the automotive molds, the most stringent requirement is the lamp mold, so the design of the injection mold for the lamp is very high. The main components that make up the car lights are: left and right lenses, left and right decorative frames, left and right lamp housings, left and right reflectors, etc. This article mainly introduces the design structure of the injection mold for the decorative frame of the car lamp.
The car lamp decoration frame is one of the more important parts of the car lamps. Its appearance quality is strictly required, and the mold of the car lamp decoration frame needs to be electroplated. For the design of the lamp decoration frame mold, the following points should be paid attention to: 1) The injection mold of the lamp decoration frame that needs to be electroplated should avoid the generation of weld lines as much as possible, because any weld lines of the injection molded parts that need to be electroplated will be exposed , Seriously affect the appearance of the lamp decoration frame, so we should avoid the weld line when designing the gating system. If the weld line cannot be avoided, we should try to set it in the non-appearance area, and pass the mold flow analysis verification before the gating system design. 2) The surface of the car light decorative frame is generally designed with a pattern. When designing the mold of the car light decorative frame, attention should be paid to the depth of the pattern of the plastic part, otherwise it is easy to produce flow lines.
3) The molding process range of the plastic raw materials we use is very narrow, and bright spots are easy to appear on the surface of the car light decoration frame, which is difficult to control. When designing the pouring system of the lamp decoration frame mold, the runner should be as large as possible, and the fan gate should be used, and the gate width can reach 35~40mm, which is conducive to melt filling.