|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||264/028 ; 264/040.1 ; 264/040.3 ; 264/572 ; 425/130 ; 425/145 ; 425/146 ; 425/155 ; 425/160|
|발명자 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 8 인용 특허 : 47|
A supply of pressurized gas is separated into a first quantity of pressurized gas at a first temperature and a second quantity of pressurized gas at a second lower temperature. The first and second quantities of gas are injected into molten plastic in an injection mold in a predetermined sequence to form a hollow molded plastic article. A controller independently controls the pressure and time of delivery of the first and second quantities of pressurized gas supplied to the mold. A third quantity of extremely lower temperature gas may also be supplied to...
[ What is claimed is:] [1.] A gas assisted injection molding apparatus for use with an injection mold, the apparatus comprising:means for injecting molten plastic into an injection mold;a source of injection gas;first means, disposed in fluid communication with the source of injection gas, for delivering a first quantity of injection gas at a first temperature to the injection mold;second means, disposed in fluid communication with the source of injection gas, for delivering a second quantity of gas at a second temperature to the injection mold;means, co...