发明名称 |
Apparatus for forming high-impact transparent, distortion-free polymeric materials |
摘要 |
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.
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申请公布号 |
US7455510(B2) |
申请公布日期 |
2008.11.25 |
申请号 |
US20070787265 |
申请日期 |
2007.04.13 |
申请人 |
OAKEY EDWIN J;TINNEY RODNEY M |
发明人 |
OAKEY EDWIN J.;TINNEY RODNEY M. |
分类号 |
B29C35/16;B29C51/10;B29C51/00;B29C51/04;B29C51/08;B29C51/26;B29C51/32;B29C51/42;B29C51/46;B29C55/20 |
主分类号 |
B29C35/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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