The undercut surface on the product is separated into separate core surface and pulled in the other direction to the direction of opening the mold to release the product. The system is often used to remove about 15 ÷ undercut the 40% price increase of molds and plastic injection products prices. For small undercut and enough plastic material commonly used coercive methods push to get the product out of the mold without the use of the core system side.
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