A draft slope is a pre-determined slope in the shape of the product to make it easier to remove the product from the mold.
The draft angle is a slope that is provided in advance to make it easier to remove the product from the mold. If there is no draft angle, the product shrinks and hugs the core side.
and the ejector pin may be bent.
So, how much draft is necessary?
The default is 2.0° on the cavity side and 0.5° on the core side.
If the slope of the core side is larger than that of the cavity side, the mold releasability of the core side may exceed that of the cavity side, causing the product to stick to the cavity side (cavitation).
Normally, the product ejector pin is located on the core side (movable side), so if the product sticks to the cavity side without the ejector mechanism, the product will not be ejected.
If the product sticks to the cavity side, it will be difficult to take out the product, and mass production will not be possible.
Therefore, when setting up a draft slope, the slope on the cavity side is intentionally larger than that on the core side to improve mold release on the cavity side and ensure that the molded product remains on the core side.
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