Product weight control method based on iteration modeling and optimization for injection molding process

A technology of injection molding and weight control, applied in the field of weight control of injection molding products, can solve problems such as difficulty in convergence, and achieve the effect of saving optimization costs, strong practical operability, innovation and operability

Inactive Publication Date: 2015-07-15
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

Although this method can reduce the test cost of weight control and shorten the control time to a certain extent, it still requires a certain amount of test cost and control time, and the efficiency of the method depends on the efficiency of its core model-free algorithm, which is difficult to converge. sex

Method used

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  • Product weight control method based on iteration modeling and optimization for injection molding process
  • Product weight control method based on iteration modeling and optimization for injection molding process
  • Product weight control method based on iteration modeling and optimization for injection molding process

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Embodiment

[0038] The implementation process of a weight control method for iterative modeling and optimization of the injection molding process proposed by the present invention will be described below by taking the weight control of a plastic lens as an example.

[0039] First, enter step (1) to collect data and initialize parameters; the weight control target W of the product is tg =7.83 grams, according to the weight fluctuation of the product, set the weight deviation tolerance τ=0.005 grams, the modeling data upper limit U is set to 20, the model residual tolerance C is set to 2, and the trust region related parameters {ρ,λ,ε ,μ} is set to a constant value; the optimized operating variables are: injection speed, holding pressure and holding time, where the injection section is divided into one section and two sections for control respectively, and the subsection point is also a key process parameter . In this way, a total of 5 process parameters need to be adjusted in the product ...

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Abstract

The invention discloses a product weight control method based on iteration modeling and optimization for injection molding process. The method is directed at the problems of frequent changing of operational parameters, difficult process modeling, limited model precision and the like in the injection molding process and realizes rapid product weight control based on iteration modeling and optimization by utilizing the characteristics of low cost and batch repeatability of the injection molding process. The method provided by the invention can avoid process modeling, reduce experimental expenditure in the process of product weight control and shorten control time, and is of important significance to improvement of weight control efficiency in the process of injection molding and realization of energy saving and emission reduction in the production process of the injection molding industry.

Description

technical field [0001] The invention relates to the field of weight control of injection molded products, in particular to a product weight control method for iterative modeling and optimization of the injection molding process. Background technique [0002] Injection molding is a common and important plastic processing method. The weight of molded products is an important quality performance index of injection molded products. The weight control of injection molded products is of great significance to the quality control of products. However, the injection molding process is a complex, multi-stage, multi-variable and non-linear batch production process. There are many factors affecting the weight of injection molded products, which makes it difficult and costly to control the weight of injection molded products. [0003] From the perspective of product quality control, currently in the field of injection molding weight control, commonly used weight control methods includ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/76
CPCB29C45/7686B29C2945/76615
Inventor 陈曦赵瑾瑾杨毅高福荣
Owner ZHEJIANG UNIV
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