|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||264/455 ; 264/403 ; 264/51 ; 264/328|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 32 인용 특허 : 2|
A method of molding articles of plastic having an expanded plastic cellular core using a closable and sealable mold having a sealed mold cavity and including at least one mold core extending into the cavity, comprises, directing the plastic melt material containing a foaming agent into the mold cavity under pressure so as to form a flow front of the melt which progresses through the cavity and which spreads out in all directions and flows around the mold core and tends to form a pocket of gas in the vicinity of the mold core, and venting the cavity adjac...
A method of injection molding articles of foamable plastic material having a smooth surface and an expanded cellular core, using a closable mold having a sealable mold cavity with a gas therein and at least one fixed mold core extending into the mold cavity, with at least one intermediate shadow space of the mold cavity adjacent the mold core, comprising: injecting a melt of the plastic material containing a foaming agent into the cavity against the counter-pressure of the gas which is provided to prevent expansion of the melt during the mold filling ope...