Patent ID: 11860590
Assignee: ZHEJIANG UNIVERSITY
Field: Other special machines (Mechanical engineering)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A model-free optimization method of process parameters of injection molding, characterized by comprising the steps of:
(1) determining a quality index Q to be optimized and a quality index target value Qtarget directed to the injection molding technology to be optimized;
(2) determining n process parameters to be optimized, determining and pretreating initial values of the process parameters to be optimized to obtain an initial parameter sample;
(3) respectively perturbing each parameter of a current parameter sample to obtain n sets of perturbed parameter samples, and finally obtaining n+1 sets of parameter samples comprising the current parameter sample and corresponding n+1 quality index values Q1;
(4) using n+1 quality index values Q1 obtained by acquisition to calculate a gradient value at the current parameter sample;
(5) based on the obtained gradient value, updating the current parameter sample, and using the updated parameter sample to calculate a corresponding quality index value Q2; making a comparison between the quality index value Q2 and the quality index target value Qtarget of the quality index:
outputting an optimum process parameter if it meets the preset requirements;
or, using the updated parameter sample and quality index value Q2 to replace a set of parameter sample having the worst optimal target value in n+1 sets of parameter samples in step (3) and the quality index value Q1, and returning to step (4).