METHOD FOR CREATING INJECTION SPEED PROGRAM PATTERN FOR INJECTION MOLDING MACHINE AND CONTROL DEVICE FOR INJECTION MOLDING MACHINE

摘要

Provided is a method for creating an injection speed program pattern for an injection molding machine by which good products can be continuously molded with the least amount of operation energy, by repeating a simple trial shot which does not require highly proficient judgment. Among portions in a die cavity where a flow path of a molten resin is branched or a cross-sectional area of a flow path changes stepwise, n-portions are arbitrarily selected, n being at least one; the die cavity is sectioned from a first filling section (K1) to n+1-th filling section (Kn) using the selected n-portions as boundaries; pressure upper limit values (P1, P2 ………) which are the minimum injection pressure capable of filling the respective filling sections (K1 ………) full of the molten resin are obtained; the pressure upper limit values (P1, P2 ………) obtained for the respective filling sections (K1 ………) are set to perform a trial shot for a molded product (Z); and an actual measured pattern of the injection speed when a good product is obtained is used as an injection speed program pattern (VPT) for a speed priority control.