Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1995-07-12
1997-09-09
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264 404, 2643281, 264 405, 425147, 425149, 425586, B29C 4576, B29C 4577
Patent
active
056652828
ABSTRACT:
When molding is carried out by injecting and charging a measured resin into a mold by a pushing-out member, a measured value of a stroke length of the pushing-out member is calculated and set in advance when the pushing-out member is advanced up to the maximum forward position. The stroke of the pushing-out member is measured from the maximum forward position based on the measured value at a time of a measuring. The pushing-out member is advanced from a measuring completion position to the maximum forward position and then the injecting is carried out. Accordingly, a pressure retaining process becomes unnecessary for reserving a cushion amount and controlling a pressure, and also the resin is charged into the mold based on an always constant molten time. Therefore, a molding product can be made uniform.
REFERENCES:
patent: 3666141 (1972-05-01), Ma et al.
patent: 4311446 (1982-01-01), Hold et al.
patent: 5002717 (1991-03-01), Taniguchi
patent: 5110522 (1992-05-01), Inaba et al.
patent: 5260010 (1993-11-01), Yokota
patent: 5470514 (1995-11-01), Dray
Heitbrink Jill L.
Nissel Plastic Industrial Co., Ltd.
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