Improved valve gate for hot runner injection molding machine

摘要

Method and the device which raise the quality of the formation item in the formation system which possesses valve stem and the valve gate. As for valve stem, from the position where it backed up completely the valve gate opens completely, in the complete front position where the valve gate has closed completely, in addition, the valve gate continues to close, but through particular valve stem by the fact that particular valve stem moves from the valve gate it is movement possible in the intermediate position to which heat transfer to the valve gate territory becomes smallest.