|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||264/500 ; 264/451 ; 264/466 ; 264/570|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 33 인용 특허 : 1|
Process is disclosed wherein plastic material is passed into a mold cavity; pressurizing fluid is injected into the plastic material under controlled pressure and at a controlled rate to cause the plastic material to flow out and assume the contour of the cavity, the gas pressure being maintained until the plastic material is self-supporting. The resulting article has an outer skin and a generally hollow center containing skin-connecting structural “webs”.
A process for the product of a molded plastic structural web article comprising: introducing a volume less than the volume of the mold of a molten plastic material, having a high shear viscosity and elasticity, into a mold cavity having a contour which provides the desired flow length-to-thickness ratio; injecting low viscosity pressurizing fluid into said molten plastic material in said mold cavity through at least one injection opening and at a fluid flow rate and fluid pressure to cause (i) said pressurizing fluid to penetrate into said molten plastic...