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
2008-07-01
2008-07-01
Mackey, James (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Positioning of a mold part to form a cavity or controlling...
C164S004100, C164S151200, C164S154200, C164S340000, C425S138000, C425S150000, C425S152000, C425S577000
Reexamination Certificate
active
11399393
ABSTRACT:
Disclosed is a method for electric clamping, which performs a clamping process in parallel with a core-drawing-in process, avoiding damages of molds and core mechanisms and enabling secure clamping. The method comprises the steps of: setting a check point, for judging safety of the clamping process in advance, in a position that is nearer to the operational start position by a predetermined distance in the mold opening direction than a position of the movable mold when the core-drawing-in process is expected to be completed, wherein the core-drawing-in process and the clamping process proceed in parallel with each other in a straight course for reciprocating a movable mold; activating a core system and a servo-motor to start an operation to draw a core into a cavity in parallel with an operation to move the movable mold in the mold closing direction; detecting whether or not the movable mold reaches the check point; judging whether or not the core reaches the position in which the core is fully drawn into the cavity at a point of time at which the movable mold reaches the check point, and confirming the completion of the core-drawing-in process. Thereafter, the clamping process of the molds is further continued if confirming that the core-drawing-in process is already completed.
REFERENCES:
patent: 4986944 (1991-01-01), Bertschi
patent: 5244372 (1993-09-01), Ramsey et al.
patent: 6299426 (2001-10-01), Scanlan
patent: 7-88616 (1995-04-01), None
Abe Yuji
Itani Shinya
Mackey James
Pillsbury Winthrop Shaw & Pittman LLP
Toshiba Kikai Kabushiki Kaisha
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