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1. (WO2015045473) ROTARY-TYPE POWDER COMPRESSION MOLDING DEVICE AND METHOD OF OPERATING SAME

Pub. No.:    WO/2015/045473    International Application No.:    PCT/JP2014/062505
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Sat May 10 01:59:59 CEST 2014
IPC: B30B 11/08
B30B 11/02
Applicants: HATA IRON WORKS CO., LTD.
株式会社畑鐵工所
Inventors: WADA, Yasunori
和田 泰典
UEMURA, Minoru
上村 稔
Title: ROTARY-TYPE POWDER COMPRESSION MOLDING DEVICE AND METHOD OF OPERATING SAME
Abstract:
Provided is a method of operating a powder compression molding device with which the mass and thickness of a molded product manufactured by compressing powder are maintained within a standard range irrespective of changes in the temperature of a powder compression molding machine. An estimated pressure variation and a thickness variation when the mass of a molded product is controlled are obtained, and the thickness variation and the mean thickness are used to obtain an estimated thickness. An estimated pressure variation and an estimated punch tip gap when the thickness of the molded product is controlled on the basis of the estimated thickness are obtained, and the set value of the punch tip gap is updated using the estimated punch tip gap. In conjunction with this, the estimated pressure variation values and the mean molding pressure value are used to obtain an estimated pressure control reference value, the pressure control reference value is updated using this estimated value, and a control pressure value in a pressure control unit is updated. The mass and thickness of the molded product are maintained within the standard range by updating the set value of the punch tip gap to control the punch tip gap, and by updating the control pressure value in the pressure control unit to control the molding pressure in this way while the molding machine is being operated.