Title:
ZERO ADJUSTMENT METHOD OF LOAD CELL IN ELECTROMOTIVE INJECTION MOLDING MACHINE
Document Type and Number:
Japanese Patent JP3535106
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for conducting a zero adjustment of a load cell for detecting a back pressure of a screw accurately in a short time, in an electromotive injection molding machine.
SOLUTION: A screw 4 is incorporated inside a barrel 2 and a ball screw 7 is connected to its edge portion via a load cell 5 and further a servo motor 8 is connected to the ball screw 7. At first the barrel 2 is moved backward to be separated from a die 1 and then the screw 4 is moved to an intermediate position of its stroke. Then after the screw 4 is moved forward for a predetermined time, the pressure of the servo motor 8 is gradually decreased to stop the servo motor 8 and to detect the output of the load cell 5. The output of the load cell 5 is adjusted so that a calculated average value of the outputs after moving forward and after moving backward, the value being regarded as the output of the load cell 5 under an unloaded state, becomes zero.
Inventors:
Katsuta, Hiroshi
Nishizawa, Makoto
Nishizawa, Makoto
Application Number:
JP2001055041A
Publication Date:
June 07, 2004
Filing Date:
February 28, 2001
Export Citation:
Assignee:
TOSHIBA MACH CO LTD
International Classes:
B29C45/17; B29C45/50; B29C45/76; B29C45/77; G01G23/01; G01G23/16; (IPC1-7): B29C45/50; B29C45/76
Attorney, Agent or Firm:
鈴江 武彦 （外６名）