Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Reexamination Certificate
2008-07-01
2008-07-01
Davis, Robert B. (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
C264S334000, C425S444000, C425S577000
Reexamination Certificate
active
07393490
ABSTRACT:
A molding method and apparatus includes movable die30and fixed die20which form cavity50, and extrusion plate40movable in the die closing/opening direction. A die surface32bcorresponding to the undercut portion is formed by separate push-up block32, which is fixed to push-up pin42, which is tiltably held by extrusion plate40, and passes through insertion hole34in movable die30. A gap34aenables push-up pin42to tilt in the insertion hole. Push-up block32releases the part from the movable die by relative movement between extrusion plate40and movable die30, and, by further movement of the part, the slanted surface of the undercut portion pushes the die surface of the push-up block in a direction which intersects with the die closing/opening direction to free the undercut portion by tilting the push-up pin and push-up block.
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Davis Robert B.
Koito Manufacturing Co. Ltd.
Luk Emmanuel S
Sughrue & Mion, PLLC
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