|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||425/130 ; 264/572 ; 425/562 ; 425/563|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 10 인용 특허 : 0|
A check valve is provided that is especially useful in gas-assisted injection molding wherein pressurized gas is injected into molten plastic material. A tapered or cone-shaped valve member which seats into a correspondingly tapered or cone-shaped valve chamber provides the mechanism by which the valve seals against reverse flow. Any plastic material entering the gas passageway would contact the base end of the tapered or cone-shaped valve member and not any sealing surfaces. By minimizing contact with the sealing surfaces, the useful lifetime of the che...
A nozzle for use in a fluid-assisted plastic injection molding apparatus, said nozzle including (a) a nozzle body having an upstream end for fluid communication with an end of an associated plastic injection molding machine and a downstream end for fluid communication with a sprue of an associated mold body, said nozzle body including (1) an axially extending first bore for establishing a plastic flow path, (2) a second bore extending through, and non-axially to, the nozzle body where a first end of the second bore is in fluid communication with a fluid ...