发明授权
- 专利标题: Method for the manufacture of molded solid plastics articles
- 专利标题(中): 模制固体塑料制品的制造方法
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申请号: US3655861D申请日: 1968-11-29
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公开(公告)号: US3655861A公开(公告)日: 1972-04-11
- 发明人: ROBERTS ARTHUR H
- 申请人: ROBERTS ARTHUR H
- 专利权人: Arthur H Roberts
- 当前专利权人: Arthur H Roberts
- 优先权: US77983768 1968-11-29; US47598965 1965-07-30
- 主分类号: B29C39/20
- IPC分类号: B29C39/20 ; B29C41/14 ; B29C44/18 ; B29C70/00 ; B29C13/04
摘要:
THIS INVENTION RELATS TO THE PREPARATION OF COMPOSITE ARTICLES OF MANUFACTURE AND TO THE ARTICLES SO PRODUCED. THE ARTICLES ARE IMPACT-RESISTANT, THREE-DIMENSIONAL AND RIGID. THE ARTICLES ARE COMPRISED OF TWO ESSENTIAL ELEMENTS: (1) A PLIABLE, HOLLOW PREMOLDED OUTER PLASTICS LAYER AND (2) AN ESSENTIALLY RIGID NON-CELLULAR ORGANIC PLASTICS STRUCTURAL BACKING MEMBER SOLIDIFIED IN THE HOLLOW INTERIOR OF THE PLASTICS SKIN, AND ESSENTIALLY SOLIDLY FILLING SAID HOLLOW INTERIOR. THE HOLLOW OUTER LAYER IS PREPARED IN A MANNER TO HAVE AN ACCESS OPENING TO ITS HOLLOW INTERIOR. A LIQUID PLASTICS COMPOSITION IS NEXT PREPARED IN A SEPARATE STEP THAT COMPRISES AN ORGANIC BINDER WHICH SOLIDIFIES AT ROOM TEMPERATURE, IN MOST CASES BY CONVERTING TO A THERMOSET STAGE. THIS LIQUID COMPOSITION IS THEN INTRODUCED THROUGH THE ACCESS OPENING INTO THE CAVITY OF THE PREMOLDED OUTER LAYER. THE LIQUID COMPOSITION IS THEN SOLIDIFIED IN A MANNER TO FILL ESSENTIALLY VOIDLESSLY AND FULLY THE CAVITY OF THE OUTER LAYER, THUS PRODUCING A DENSE TOUGH INTEGRAL ARTICLE OF MANUFACTURE HAVING THE SHAPE OF A PREMOLDED OUTER LAYER. ILLUSTRATIVE FOR THE OUTER LAYER MATERIALS ARE PLASTICIZED POLYVINYLCHLORIDE COMPOSITIONS, POLYETHYLENE AND RUBBERS. ILLUSTRATIVE FOR THE INTERIOR COMPONENT ARE EPOXY RESINS, POLYESTER RESINS, ROOM TEMPERATURE CURING PHENOLICS AND FILLER CONTAINING POLYSULFIDE RUBBER, REPOLYMERIZED DEPOLYMERIZED RUBBER AND POLYURETHANES. FILLERS MAY BE PRESENT IN THE LIQUID COMPOSITIONS. BY THE FAVORED METHOD DECORATIVE AND UTILITARIAN ARTICLES WITH COMPLICATED UNDERCUTS CAN BE PREPARED IN A SIMPLE AND ECONOMIC MANNER.
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