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
1981-08-27
1982-11-02
Hoag, Willard E.
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
156181, 264137, 264258, B29D 302, B29G 500
Patent
active
043572928
ABSTRACT:
Metal shims are positioned within intersecting slots of a lower mold member, normally employed in the molding of an open grid fiberglass reinforced molded resin grating with the shims being of a height less than the vertical height of the slots. The grating is repositioned in the slots such that the upper ends of the grating bars project above the upper surface of the lower mold member. The upper mold member bearing projecting grids corresponding to the slots is covered with a solid checker plate. An impregnated glass sheet formed of the same molding compound as the open grid molded resin grating is interposed between the checker plate and the grating. A further shim defining the extent of compression of the molding compound sheet is interposed between the lower mold member and the checker plate. Pressure lowering of the upper mold onto lower mold member supported glass sheet is effected while heat is applied to compression mold the glass sheet as a solid floor plate onto one side of the open grid molded resin grating preform.
REFERENCES:
patent: 1406160 (1922-02-01), Klug
patent: 3645833 (1972-02-01), Figge
patent: 3772126 (1973-11-01), Myers
patent: 3851038 (1974-11-01), Meyer
Hoag Willard E.
International Grating, Inc.
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