公开(公告)号：US5460218A

公开(公告)日：1995-10-24

申请号：US155330

申请日：1993-11-22

申请人： Tomoyoshi Miwa ,  Noriyoshi Yamauchi ,  Hitoshi Ishida

发明人： Tomoyoshi Miwa ,  Noriyoshi Yamauchi ,  Hitoshi Ishida

IPC分类号： B22D17/14 ,  B22D17/22 ,  B29C45/34 ,  B22D17/32

CPC分类号： B22D17/145

摘要： A method and apparatus capable of continuously discharging contaminated gas out of metal molds, the gas being generated prior to the casting step and including moisture. A gas vent valve is provided at a gas vent passage in communication with a mold cavity. A suction unit and a vacuum pump are selectively connected to the gas vent valve. After closure of the metal molds, the suction unit is connected to the gas vent valve to perform sucking interior of the mold cavity. By this suction, an external air is introduced into the metal molds through a pouring port of a shot sleeve. Thus, contaminated gas in the cavity is replaced with a clean air. During injection molding, the gas vent valve is connected to the vacuum pump for decompressing the mold cavity. Vapor explosion is avoidable since moisture content is removed from the mold cavity even if the molten metal is introduced into the cavity.

摘要翻译： 一种能够将污染气体从金属模具中连续排出的方法和装置，所述气体在铸造步骤之前产生并包括水分。 在与模腔连通的排气通道处设有排气阀。 抽吸单元和真空泵选择性地连接到排气阀。 在金属模具关闭之后，抽吸单元连接到排气阀以执行模腔的吸入内部。 通过该抽吸，外部空气通过喷射套筒的倾倒口引入金属模具中。 因此，空腔中被污染的气体被清洁的空气所取代。 在注射成型期间，排气阀连接到真空泵以对模腔进行减压。 蒸发爆炸是可以避免的，因为即使将熔融金属引入空腔中，也会从模腔中除去含水量。

公开(公告)号：US5379826A

公开(公告)日：1995-01-10

申请号：US131386

申请日：1993-10-05

申请人： Tomoyoshi Miwa ,  Hitoshi Ishida ,  Noriyoshi Yamauchi

发明人： Tomoyoshi Miwa ,  Hitoshi Ishida ,  Noriyoshi Yamauchi

IPC分类号： B22D17/22 ,  B22D17/14 ,  B22D17/32 ,  B29C45/34

CPC分类号： B22D17/32 ,  B22D17/145

摘要： A gas venting system is connected to a downstream side of a gas vent valve through a gas exhaust line. An electromagnetic valve and a suction unit are connected to the gas exhaust line. A pressure switch is directly connected to the gas exhaust line to detect the pressure variation within the line. By the suction through the suction unit and the opening of the electromagnetic valve, the gas exhaust line is decompressed. If the line has a perforation, the pressure does not reach a predetermined pressure. If clogging occurs, the pressure reaches a predetermined pressure while the metal molds are open and the gas vent valve is open. Thus, accurate detection to the defects can be achieved regardless of the state of the metal molds and the internal volume of a vacuum tank.

摘要翻译： 排气系统通过排气管线连接到排气阀的下游侧。 电磁阀和抽吸单元连接到排气管。 压力开关直接连接到排气管线，以检测管线内的压力变化。 通过抽吸单元的抽吸和电磁阀的打开，排气管线被减压。 如果线具有穿孔，则压力未达到预定压力。 如果发生堵塞，则当金属模具打开并且排气阀打开时，压力达到预定压力。 因此，无论金属模具的状态和真空槽的内部容积如何，都可以实现对缺陷的准确检测。