| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a harmful effect such as warpage of a molded article accompanied with ununiformity of air blowing when a product is released from a mold. SOLUTION: A fixed mold 1, a movable mold 2 provided by facing the fixed mold 1 and forming a cavity 3 for the product when the molds are clamped and a cold sprue bush 6 are provided. A compressed gas feeding path 34 wherein a base end 34A is connected with a compressed gas feeding source 37 and an apex part 34B is connected with the cavity 3 for the product through the peripheral face part 9A of the cold sprue bush 6, is provided. An annular first channel 39, a gap Y and the fifth channel 43 surrounding the peripheral face 9A are provided in the middle of the compressed gas feeding path 34 on the cold sprue bush 6. The first channel 39, the gap Y and the fifth channel 43 function gas reservoirs to uniformly adjust pressure distribution of the compressed gas and the compressed gas with a uniform pressure distribution can be ejected from the apex 34B to the side of the cavity 3 for the product. COPYRIGHT: (C)2003,JPO |
