Apparatus and method for producing molded hollow article with fi

Details Apparatus and method for producing molded hollow article with fi Apparatus and method for producing molded hollow article with fi

1982-11-22

1985-10-15

Anderson, Philip

Receptacles

Receptacle having flexible, removable inner liner

Means for venting air trapped between the liner and its...

220902, 264 466, 264 468, 264516, 264DIG1, B29D 2704

Patent

active

045468990

ABSTRACT:
The molded shell of an article, while still warm from being molded, and while remaining within the mold or fixture in which it has been created, for instance by blow-molding of a parison of polyolefin plastic material into contact with the mold walls, is filled with a fluid, settable foaming plastic material, for instance polyurethane. This may be done by injecting the foaming mixture directly into the cavity of the shell. In this manner time, labor and materials are saved, and the resulting product is characterized by better adhesion of the foamed core to the internal wall surface of the shell.

REFERENCES:
patent: 2956310 (1960-10-01), Roop et al.
patent: 3155753 (1964-11-01), Weissman et al.
patent: 3736201 (1973-05-01), Teraoka
Ferrigno, T. H., Rigid Plastics Foams, New York, Reinhold Publ. Corp., .COPYRGT.1963, pp. 53-72 and 118-123.
Encyclopedia of Polymer Science and Technology, vol. 11, New York, Interscience Publishers, .COPYRGT.1969, pp. 537-548.

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