Injection molding system and pellet feeding unit

An injection molding system comprising:

• an injection molding apparatus injecting melted resin into a die, the die being placed forward of one end of the injection molding apparatus;
• an air feeder for feeding at least air into the injection molding apparatus through a mouth arranged at an end of the injection molding apparatus opposite to the one end of the injection molding apparatus;
• a resin pellet feeding passage for feeding resin pellets into the injection molding apparatus, the resin pellet feeding passage feeding the pellets into the injection molding apparatus at a location spaced apart from where the mouth feeds the at least air into the injection molding apparatus;
• a pellet feeding regulator for controlling a feed of the resin pellets from the resin pellet feeding passage into the injection molding apparatus;
• a pellet exhaust gas passage for passing moisture and exhaust gas which are generated when the resin pellets melt in the injection molding apparatus;
• a decompressor connected to the exhaust gas passage for exhausting the moisture and the exhaust gas from a pellet feeding passage side to an outside of the injection molding apparatus;
• and
• a device for preventing the moisture and the exhaust gas which pass through the gas exhaust passage from contacting the resin pellets passing through the pellet feeding passage, with the moisture and the exhaust gas passing through a space outside the pellet feeder.

An injection molding system comprising:

• an injection molding apparatus injecting melted resin into a die, the die being placed forward of one end of the injection molding apparatus;
• an air feeder for feeding at least air into the injection molding apparatus through a mouth arranged at an end of the injection molding apparatus opposite to the one end of the injection molding apparatus;
• a resin pellet feeding passage for feeding resin pellets into the injection molding apparatus, the resin pellet feeding passage feeding the pellets into the injection molding apparatus at a location spaced apart from where the mouth feeds the at least air into the injection molding apparatus;
• a pellet feeding regulator for controlling a feed of the resin pellets from the resin pellet feeding passage into the injection molding apparatus;
• a pellet exhaust gas passage for passing moisture and exhaust gas which are generating when the resin pellets melt in the injection molding apparatus;
• a decompressor connected to the exhaust gas passage for exhausting the moisture and the exhaust gas form a pellet feeding passage side to an outside of te injection molding apparatus;
• and
• a removing apparatus placed at the exhaust gas passage.

A resin pellet feeding unit comprising:

• a device for automatically feeding pellets with a vacuum interception valve,the device and the valve being disposed to intercept a passage between a pellet storage tank and other pellet storage;
• a resin pellet feeding passage for feeding resin pellets into an injection molding apparatus;
• a pellet feeding regulator for controlling a feed of the resin pellets from the resin pellet feeding passage into the injection molding apparatus;
• an exhaust gas passage for passing moisture and exhaust gas which are generated when the resin pellets melt in the injection molding apparatus;
• and
• a decompressor connected to the exhaust gas passage for exhausting the moisture and the exhaust gas from a pellet feeding passage side to an outside of the injection molding apparatus.

A resin pellet feeding unit comprising:

• a device for automatically feeding pellets with a vacuum interception valve, the device and the valve being disposed to intercept a passage between a pellet storage tank and other pellet storage;
• a resin pellet feeding passage for feeding resin pellets into an injection molding apparatus;
• a pellet feeding regulator for controlling feed of the resin pellets from the resin pellet feeding passage into the injection molding apparatus;
• an exhaust gas passage for passing moisture and exhaust gas which are generated when the resin pellets melt in the injection molding apparatus;
• a decompressor connected to the exhaust gas passage for exhausting the moisture and the exhaust gas from a pellet feeding passage side to an outside of the injection molding apparatus;
• and
• a device for preventing the moisture and the exhaust gas which pass through the exhaust gas passage from contacting the resin pellets passing through the pellet feeding passage.

A resin pellet feeding unit comprising:

• a device for automatically feeding pellets with a vacuum interception valve, the device and the valve being disposed to intercept a passage between a pellet storage tank and other pellet storage;
• a resin pellet feeding passage for feeding resin pellets into an injection molding apparatus;
• a pellet feeding regulator for controlling a feed of the resin pellets from the resin pellet feeding passage into the injection molding apparatus;
• an exhaust gas passage for passing moisture and exhaust gas which are generated when the resin pellets melt in the injection molding apparatus;
• a decompressor connected to the exhaust gas passage for exhausting the moisture and the exhaust gas from a pellet feeding passage side to an outside of the injection molding apparatus;
• and
• a removing apparatus placed at the exhaust gas passage.

An injection molding system comprising:

• an injection molding apparatus injecting melted resin into a die, the die being placed forward of one end of the injection molding apparatus;
• an air feeder for feeding at least air into the injection molding apparatus through a mouth arranged at an end of the injection molding apparatus opposite to the one end of the injection molding apparatus;
• a resin pellet feeding passage for feeding resin pellets into the injection molding apparatus, the resin pellet feeding passage feeding the pellets into the injection molding apparatus at a location spaced apart from where the mouth feeds the at least air into the injection molding apparatus;
• a pellet feeding regulator for controlling a feed of the resin pellets from the resin pellet feeding passage into the injection molding apparatus;
• a pellet exhaust gas passage for passing moisture and exhaust gas which are generated when the resin pellets melt in the injection molding apparatus;
• a decompressor connected to the exhaust gas passage for exhausting the moisture and the exhaust gas from a pellet feeding passage side to an outside of the injection molding apparatus;
• and
• a device for preventing the moisture and the exhaust gas which pass through the gas exhaust passage from contacting the resin pellets passing through the pellet feeding passage, with the moisture and the exhaust gas passing through a space outside the pellet feeder,
• wherein the degree of decompression of said decompressor is at least one selected from among about 40 Kpa (300 torr) or more, about 70 Kpa or more, and about 80 Kpa to 95 Kpa.