Data processing: generic control systems or specific application – Specific application – apparatus or process – Product assembly or manufacturing
Reexamination Certificate
2011-03-08
2011-03-08
Decady, Albert (Department: 2121)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Product assembly or manufacturing
C264S040400, C264S040700, C425S145000, C425S149000, C425S150000
Reexamination Certificate
active
07904196
ABSTRACT:
A rotational angle of a motor operative to propel forward a screw in an injection molding machine is detected at an encoder. An output from the encoder is employed to obtain an angular velocity ω of the motor. From the obtained angular velocity ω, an estimated melt pressure value δ^ that contains no differential term is derived using a certain observer theory. The estimated melt pressure value δ^ is employed to calculate a torque command value TCMDfor the motor, which is fed back to the motor. Thus, precise propelling power control unaffected by noises can be executed without the use of a pressure sensor such as a load cell.
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Clark Hill PLC
De'cady Albert
Stevens Thomas
Ube Machinery Corporation, Ltd.
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