Because the automobile industry's replacement cycle is relatively short, just developed a new type of car, it will be out in a or two years. In order to be able to occupy a foothold in the market, the automakers need continue to develop new cars, in this process, it is necessary to use to do automotive prototype. In many automotive prototypes, most of materials are mainly plastic, such as car panel prototype, front lamp prototype, rearview mirror prototype and bumper prototype, etc.
In many automotive plastic prototype, different appearance and size prototype, the processing method is not the same. In general, the automotive plastic prototype processing is mainly CNC processing, 3d printing and vacuum casting. The following, let us introduce it in detail.
CNC Machining is mainly applicable to those larger sizes , simple structure of the plastic prototype. And the advantage of CNC machining uses plate for processing directly, its performance (such as strength, high temperature, etc.) is better than 3d printing. For those with complex structure, small size of the prototype, using 3d printing to do is a good choice, because the 3d printing’ price is calculated according to weight, and the complexity of the plastic hand is irrelevant, The prototype by 3d printing has a disadvantage, which is very crisp, it can not stand the heavy blow. So the car plastic prototype is basically only the key to use 3d printing to do, because the key can withstand relatively small strength. And the prototype by vacuum casting is mainly for small batch production, the number of general in dozens of to 100 or so. Due to the thermal expansion and contraction, vacuum casting’ prototype is worse than CNC machining and 3d printing in precision.
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