Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1979-03-07
1981-04-14
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
264248, 264267, B29C 2700, B29F 100
Patent
active
042619475
ABSTRACT:
A method of making a plastic article and in particular a hollow plastic article having reinforcing ribs or ridges in the inner side such as an air cleaner casing, a tank or an airtightly closed float. The plastic article comprises at least two separately molded portions and at least one molded joint portion which is molded in jointing grooves formed between opposed dividing end faces of the molded portions, the molded joint portion and the separately molded portions being united into one body by fusing at their contact surfaces. The method of manufacturing the plastic article consists of at least two separately molded plastic portions or parts, in particular a method for jointing two plastic portions or parts which are molded separately, comprises steps of providing a groove and/or cutout extending along each of the dividing end faces of the molded portions to be jointed, holding said molded portions in a position of desired assembled relationship to provide a jointing groove extending between the opposed dividing end faces and being opened to the outside, filling said jointing groove with heated and plasticized or molten plastic material by injection molding, extruding molding or casting molding at such a temperature that the plastic material injected, extruded or poured into the jointing groove fuses the plastic material of the molded portions at their contact surfaces and thereby upon cooling and hardening, the molded portions are united into one body through the molded joint portion to provide a rigidly and integrally connected plastic article.
REFERENCES:
patent: 1494523 (1924-05-01), Zwicker
patent: 1789642 (1931-01-01), Wirth
patent: 2388042 (1945-10-01), Daily
patent: 3264394 (1966-08-01), Gohl
patent: 3893777 (1975-07-01), Jones
patent: 3920787 (1975-11-01), McDowell et al.
patent: 3975490 (1976-08-01), Lapeyre
Whittington, Lloyd R., "Whittington's Dictionary of Plastics", Stamford, Conn., Technomic, .COPYRGT.1968, pp. 179-181.
Anderson Philip
Nilles James E.
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