Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Reexamination Certificate
2007-01-23
2007-01-23
Heitbrink, Jill L. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
C264S328100
Reexamination Certificate
active
10752710
ABSTRACT:
The electric injection molding machine comprises a sensor21,servo motor15,a motor23and a controller30and, in a plasticizing process in which the motor23is rotated, the controller30performs control by repeating a first process in which the rotation of the servo motor15is controlled by a first retreating speed command value33to make the screw13retreat at a low speed when a screw backpressure signal is smaller than a backpressure set value31and a second process in which the rotation of the servo motor15is controlled by a second retreating speed command value34to make the screw13retreat at a high speed when the screw backpressure signal is larger than the backpressure set value31.
REFERENCES:
patent: 6365075 (2002-04-01), Kamiguchi et al.
patent: 6368095 (2002-04-01), Chang
patent: 2000-318003 (2000-11-01), None
patent: 2003-334848 (2003-11-01), None
Patent Abstracts of Japan, “JP 61-031221 published Feb. 13, 1986, applicant Nissei Plastics IND Co, entitled: Control of Backpressure in injection Molding Machine”.
Patent Abstracts of Japan, “JP 04-249129 published Sep. 4, 1992, applicant FANCU Ltd, entitled: Injection, Dwell Pressure and Back Pressure Control Method for Motorized Injection Molding Machine”.
Patent Abstracts of Japan, “JP 02-120020 published May 8, 1990, applicant FANCU Ltd, entitled: Back Pressure Control Method And Device In Motor-Driven Injection Molding Machine”.
Oka Keijiro
Yabuki Yasuhiro
Browdy and Neimark PLLC
Heitbrink Jill L.
Kabushiki Kaisha Meiki Seisakusho
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