In plastic injection molding, the release of the runner is as important as the release of the product. If the mold cannot be released smoothly, the runner will be broken and will remain in the mold, or it will not be able to be removed by the removal machine.

①Runner protruding by ejector pin

This is a method of protruding the runner at the same time of protruding the product with the ejector pin. It cannot be applied unless the runner is on the movable side due to its structure.

②Release by runner stripper plate

This is the method used by pin gate runners. When the plastic injection mold opens, the runner stripper plate is lifted with a chain or hairpin, and the runner fixed with the runner lock pin is peeled off and released.