Joints and connections – Molded joint – Member cast in situ
Patent
1997-02-21
1998-11-24
Knight, Anthony
Joints and connections
Molded joint
Member cast in situ
403265, B29B 1300
Patent
active
058398473
ABSTRACT:
A pressure-molded article having integral attachment points is achieved by providing, during the molding process, a fastener having a base surface portion, a side surface portion, and an internal passage defining an air path from the base surface portion to the side surface portion. The fastener's base surface portion is positioned on a molding surface of a pressure-molding tool such that the passage is placed in fluid communication with a hole in the molding surface. A formable material, such as a sheet of thermoplastic material heated to a formable state, is positioned adjacent to both the molding surface and the fastener. The sheet is pressure-formed onto the molding surface while preferably evacuating the hole in the molding surface, such that air disposed between the sheet and the molding surface adjacent to the side surface portion of the fastener is drawn into the passage and down into the hole, with the sheet partially flowing into the passage to mechanically capture the fastener within the sheet.
REFERENCES:
patent: 1411229 (1922-03-01), Thomas
patent: 2440144 (1948-04-01), Hosking
patent: 2779061 (1957-01-01), Hosking
patent: 3074292 (1963-01-01), Polmon
patent: 3129472 (1964-04-01), Hensel
patent: 5110382 (1992-05-01), Terry et al.
patent: 5252164 (1993-10-01), Mills
patent: 5494542 (1996-02-01), Muller
Knight Anthony
McDonnell Douglas Corporation
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