Title:
高耐衝撃性透明無歪みポリマー材料を成形する方法および装置
Document Type and Number:
Japanese Patent JP4490688
Kind Code:
B2
Abstract:
A method and apparatus are provided for forming a sheet of polymeric material, such as polycarbonate. A forming mold is provided having halves that engage for forming a heated sheet therebetween. Each of the halves defines an interior cavity having a peripheral edge. The sheet is retained between the peripheral edges of the halves and a vacuum is generated within one of the cavities for drawing the sheet therein, whereby a sensing mechanism detects a draw depth for initiating a cooling mechanism to cool the sheet to a temperature below a glass transition temperature of the material. A series of retention mechanisms are provided about the peripheral edge of one of the halves, for biasing the sheet into engagement with the peripheral edge of the opposing half. A trimming mechanism is further provided for trimming the perimeter of the sheet to a desired form.
Inventors:
O'Kee Edwin Jay
Tiny Rodney M
Tiny Rodney M
Application Number:
JP2003520561A
Publication Date:
June 30, 2010
Filing Date:
August 13, 2002
Export Citation:
Assignee:
EDWIN J.OAKEY
International Classes:
B29C51/10; B29C51/00; B29C51/04; B29C51/42; B29C51/46; B29C35/16; B29C51/08; B29C51/26; B29C51/32
Domestic Patent References:
| JP8169051A | ||||
| JP58072409A | ||||
| JP6055627A | ||||
| JP64022418U | ||||
| JP6023834A | ||||
| JP1122427A | ||||
| JP1204719A | ||||
| JP8500784A |
Foreign References:
| US4352776 |
Attorney, Agent or Firm:
Takao Koshikawa