A car bumper is one of the most important external parts of a car. Not only has sufficient strength and rigidity, it can also play a buffering role in a collision accident, protect the body, and pursue harmony with the body shape. In order to achieve these goals, current car bumpers are made of plastic, commonly known as plastic bumpers.
The characteristics of automobile bumper shape are:
1. The shape is complex, the size is large, and the wall thickness is relatively small. It is a large thin-walled plastic part.
2. K/Os, S/Os, large ribs, resistance to melting flow.
3. There are 3 undercuts on the inside of the car bumper, and it is difficult to pull the core horizontally at each position.
The conclusion is:
1. Using internal grading technology to ensure the appearance of plastic parts.
2. The shape of the automobile bumper adopts the secondary core-pulling structure of "composite inclined roof", which solves the problem of lateral core-pulling of complex parts.
3. The eight-point needle valve type sequence valve hot runner casting system is used to solve the melt filling problem of large thin-walled plastic parts.
4. The hydraulic pressure is used as the power of the demolding system, which solves the problem of the large demolding force of plastic parts and difficulty in resetting the press sheet
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