The existence of the draft angle is to make it easier for the workpiece to be separated from the plastic mold. Without the draft angle, the workpiece cannot be ejected and is easily damaged and becomes a defective product. If the draft angle is not set, the overall design of the mold must be relatively complex. The mold design is too complex, which is not conducive to processing and is likely to increase the resources lost in mold manufacturing. Therefore, the existence of the draft angle is very necessary. So what should be paid attention to in the design of the draft angle?

Plastic mold

1. The definition of the draft angle is the angle between the side tangent of the intersection of the workpiece and the mold parting surface and the normal of the mold parting surface. The standard draft angle is about 1-2 degrees.

2. For places with special requirements, the draft angle can be set without a mold release agent to prevent the workpiece from sticking to the mold, but the use of a mold release agent can easily cause stains or cracks on the appearance of the workpiece.

3. When the appearance of the mother mold surface has a bite flower requirement, the processing pattern will form a dead angle. At this time, the demoulding angle must be set larger than the general case.

4. Poor surface polishing can easily form dead angles, which will affect the demoulding process of the product. It is necessary to increase the demoulding angle appropriately to avoid poor appearance of the product caused by poor demoulding.

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