MANUFACTURE OF THICK PLASTIC BOARD, AND THICK BOARD MANUFACTURED THEREBY

Japanese Patent JP3075683

B2

PURPOSE: To make it possible to manufacture a high quality thick board, by furnishing a blocking means for rendering a foaming means temporarily inactive.
CONSTITUTION: A blocking means (e.g. a gas supply means for providing a gas into a mold cavity under a pressure) is energized to render a foaming means for foaming an injected plastic in a mold cavity temporarily inactive. Next, a plasticization/injection unit is energized at a first extreme position of the mold in order to inject a heated plastic into the mold cavity. Then, the energizing of the blocking means as well as of the plasticization/injection unit is stopped. In this state, a displacing means is energized so that the mold parts displace relative to each other under a specified condition, Next, the molded thick board is cooled to a specified temp., aid the mold cavity is fully released open in order to obtain a thick plastic board with a sandwich-like structure which has a thickness of at least 6 mm, and comprises a foam core and independent skin layer plates.

Francis Cusevbertus Richters
Johannes Dring
Andreas Bernardus Eidhoff
Christian Antonius Yahers

JP15938795A

August 14, 2000

June 26, 1995

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Corel Resin Technology Besloten Fennaught Shap

B29C33/44; B29C44/10; B29C44/14; B29C45/00; B29C45/14; B29C45/16; B29C45/26; B29C45/46; B29C45/56; B29C45/76; B29K23/00; B29K55/02; B29K101/12; B29K105/04; B29K503/04; B29K509/08; B29L9/00; (IPC1-7): B29C45/00; B29C45/16; B29C45/26; B29C45/76

JP4144721A

【文献】米国特許4096218(US,A)

Aoyama Ryo (1 person outside)

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