Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...
Reexamination Certificate
2006-02-14
2006-02-14
Heitbrink, Jill L. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Positioning of a mold part to form a cavity or controlling...
C264S328700, C425S149000, C425S150000, C700S203000
Reexamination Certificate
active
06998076
ABSTRACT:
A method of this invention is an injection compression molding method of molding a thin molding, using an injection compression molding machine including: a pair of a movable mold and a stationary mold defining a molding space; a movable die plate on which the movable mold is mounted; a stationary die plate on which the stationary mold is mounted; an injection unit for injecting a molding material into the molding space; and a mold clamping unit for causing the movable die plate to move toward and away from the stationary die plate, capable of controlling a clamping pressure for pressing the movable die plate toward the stationary die plate while the injection unit is injecting the molding material into the molding space. This method includes a nonloaded flow step of controlling the mold clamping unit in such a manner that any resistance is not exerted substantially against flow of the molding material injected into the molding space by the injection unit, during the injecting step. In addition, this method includes a preliminary clamping step of controlling the mold clamping unit in such a manner that a predetermined preliminary pressure is applied to the molding material that has been injected into the molding space by the injection unit, during the injecting step.
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patent: 5705105 (1998-01-01), Inoue
patent: 6331263 (2001-12-01), Abe et al.
patent: 6716374 (2004-04-01), Yutani et al.
patent: 6814908 (2004-11-01), Marazita
patent: 6840618 (2005-01-01), Pope
Heitbrink Jill L.
Pillsbury Winthrop Shaw & Pittman LLP
Toshiba Kikai Kabushiki Kaisha
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