Automobile (mass production)
Auto electrical parts
Telecommunication equipment
◆The way of thinking about gas venting and air venting
1. Bad influences by gas
①Fluidity of resin is decreased, then its filling becomes hard.
②Clogging of air vent in cavity occurs.
③Gas adheres to the surface of die, then that leads poor outward appearance.
* Exhausting the gas by which is generated with resin together from nozzle by Gas-tosu installed just under a sprue, and installing more Gas-tosu into the runner-end part to exhaust the gas and the air which remain in the inside of runner. Then it can be prevented that the gas and air enter into cavity as a result.
2. Bad influences by the poor number in air vent
①The air is compressed because exhaust of air becomes difficult, then the filling of resin becomes hard.
②The burrs appear because the parting-line which is between cavity and core is opened for escape of air.
③More high clamping force becomes necessary to prevent burrs appear.
* In order to do the molding without changing molding condition for a long time, the die which does not have a pressure of air must be made. In the next, enough nember of gas vent which air vent is not clogged during target production time must be installed. Then non-stop molding for a long time will become possible as a result.
Company name | Plamoul Seiko Co.,Ltd. | EMIDAS Member Number | 74952 |
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Country | Japan | Street address |
Tomiya City Miyagi Japan |
Telephone number | +81-22-348-1250 | Fax number | +81-22-348-1244 |
Employees | 70,000,000 JPY | Annual sales | 320,000,000 JPY |
Employees | 42 | Person in charge | Fumitomo Kikuchi |
Type of manufacturing | Jigs and tools / Electronic parts |