US 12,076,901 B2
Stabilized adaptive hydraulic system pressure in an injection molding system
Weichun Yu, Bolton (CA); and Gregory Allan Schultz, Bolton (CA)
Assigned to Husky Injection Molding Systems Ltd., Bolton (CA)
Filed by Husky Injection Molding Systems Ltd., Bolton (CA)
Filed on May 8, 2023, as Appl. No. 18/144,421.
Application 18/144,421 is a continuation of application No. 17/760,931, previously published as PCT/CA2020/051261, filed on Sep. 21, 2020.
Claims priority of provisional application 62/910,546, filed on Oct. 4, 2019.
Prior Publication US 2023/0271365 A1, Aug. 31, 2023
Int. Cl. B29C 45/82 (2006.01); B29C 45/76 (2006.01); B29C 45/77 (2006.01)
CPC B29C 45/82 (2013.01) [B29C 45/7653 (2013.01); B29C 45/77 (2013.01); B29C 2945/76006 (2013.01); B29C 2945/76307 (2013.01); B29C 2945/76498 (2013.01); B29C 2945/76785 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method for controlling an injection molding system to optimize an efficiency of the injection molding system, wherein the injection molding system includes a pump assembly, a system pressure and at least one component pressure, the method comprising:
(a) controlling the pump assembly to allow for operation of the injection molding system at a predetermined first system pressure set by a controller for a predetermined number of baseline cycles;
(b) measuring a baseline performance of the injection molding system with one or more sensors during the baseline cycles;
(c) comparing an accumulator pressure with an accumulator pressure limit;
(d) based on the baseline performance and the accumulator pressure, setting a second system pressure value as a target pressure value;
(e) setting a variable pressure setpoint equal to a third system pressure value;
(f) comparing the variable pressure setpoint to the target pressure value; and
(g) controlling the pump assembly to change the variable pressure setpoint to a value approaching the target pressure value, wherein an amount of change is determined based on a difference between the variable pressure setpoint and the target pressure value.