Method for designing mould cavity

A design method and mold technology, applied in calculation, special data processing applications, instruments, etc., can solve the problems of long mold manufacturing cycle and many mold cavity trials

Inactive Publication Date: 2007-11-21
QINGDAO BEIDOUXINGKONG ELECTRONICS TECH
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Problems solved by technology

Although these methods use the anti-deformation method to design the mold cavity to solve the product accuracy problem caused by product warping; but they can only be based on the warping deformation (although numerical simulation can obtain relatively accurate warping deformation results), Qualitative anti-deformation treatment cannot essentially solve the problem of warping and deformation of plastic parts. Only after repeated mold repairs and trial molds can a product that meets the precision requirements be obtained.
Therefore, this kind of inaccurate anti-deformation treatment design mold cavity has a lot of trial mold times, and the mold manufacturing cycle is long.

Method used

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  • Method for designing mould cavity

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Embodiment

[0008] The principle diagram of the present invention is as shown in Figure 1, and the mold cavity design method of the present invention includes

[0009] Include the following steps:

[0010] 1) According to the plastic injection molding process theory, practical experience and numerical simulation, etc., determine the reasonable injection molding process conditions and mold structure;

[0011] 2) Use numerical simulation software to divide the initial model of plastic parts into unit mesh nodes, and perform numerical simulation analysis of the injection molding process;

[0012] 3) Obtain the warpage deformation of each unit node position of the plastic part;

[0013] 4) After multiplying the warping deformation of the nodes by a relaxation coefficient less than or equal to 1, different reverse deformation treatments are performed on different positions of the original model of the plastic part;

[0014] 5) For the anti-deformation-treated plastic part model, under the pr...

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Abstract

A method for designing die cavity of mould includes utilizing value analog software to carry out value analog analysis of plastic extrusion process to obtain warping deformation distribution on plastic component after lattice node is made on initial plastic component model when process condition of preparing plastic component and mould structure are confirmed, making reverse deformation treatment on original model of plastic component according to warping deformation amount at each node position till final deformation proof model of plastic component in according with accurate requirement is obtained then designing die cavity of mould as per final deformation proof mode.

Description

Technical field: [0001] The invention relates to a mold cavity design method, in particular to a precision injection mold cavity design method based on numerical simulation quantitative anti-deformation processing, which belongs to the innovative technology of the mold cavity design method. Background technique: [0002] At present, when plastic products are injection molded, although reasonable process conditions are selected, such as melt temperature, mold temperature, injection pressure, etc., and reasonable mold pouring systems, cooling systems, etc. are used; but due to uneven shrinkage and uneven temperature , Uneven molecular orientation and other reasons will lead to warping and deformation of the product, seriously affecting the shape and dimension accuracy and product quality of the product (especially precision plastic parts). Therefore, under the premise of reasonable process conditions and mold structure, how to design the cavity of the molding mold to solve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 章争荣肖小亭廖毅娟张鹏邝卫华
Owner QINGDAO BEIDOUXINGKONG ELECTRONICS TECH
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