Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to...
Patent
1978-08-23
1981-01-27
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
264 451, 264 466, 264570, 264164, 264DIG83, 26432812, 26432813, B29C 1704, B29D 2700
Patent
active
042475155
ABSTRACT:
Process is disclosed wherein plastic material is passed into a mold cavity; pressurizing fluid is injected into the plastic material under controlled pressure and at a controlled rate to cause the plastic material to flow out and assume the contour of the cavity, the gas pressure being maintained until the plastic material is self-supporting. The resulting article has an outer skin and a generally hollow center containing skin-connecting structural "webs".
REFERENCES:
patent: 2502304 (1950-03-01), Baker
patent: 3268636 (1966-08-01), Angell
patent: 3436446 (1969-04-01), Angell
patent: 3865667 (1975-02-01), Ferrari
patent: 3919446 (1975-11-01), Smarook
patent: 3929951 (1975-12-01), Shibata et al.
patent: 3935358 (1976-01-01), Wyeta et al.
ASTM Standard Test No. D-1238-73, pp. 427-437, "Standard Method of Measuring Flow Rates of Thermoplastics by Extrusion Plastometer".
Celanese Bulletin, GIC, 7th Edition, "Standard Tests on Plastics," Celanese Plastics Co., Div. of Celanese Corp., Newark, N.J., Apr., 1974., p. 13, Front and Rear Cover Pages.
Anderson Philip
O'Brien, Jr. Gerald R.
Union Carbide Corporation
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