Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1994-09-20
1995-06-20
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
2643281, 425145, 425562, B29C 4577
Patent
active
054259061
ABSTRACT:
An injection control method for an injection molding machine uses a step of filling a molten resin into a mold with an injection screw incorporated in a heating cylinder while changing an injection speed of the injection screw at a plurality of positions, and a dwell pressure application step of applying a pressure into the mold after filling. A predetermined filling pressure for determining a closing degree of a check valve is preset. The filling step includes comparing stroke information concerning an actual position of the injection screw with information concerning a reference position of the injection screw when one of pieces of information concerning a filling pressure, that changes in the filling step, reaches the predetermined filling pressure, and adjusting a subsequently performed change operation based on a difference between two pieces of information.
Heitbrink Jill L.
Ube Industries, Inc.
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