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Plastic injecting and shaping sprue location determining method based on surface mesh

A technology of surface grid and gate position, which is applied in the field of determining the best gate position for plastic injection molding and the determination of the best gate position for plastic injection molding, which can solve the problems of complex surface grid and so on.

Inactive Publication Date: 2011-09-14
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, since the surface grid is much more complex than the mid-surface grid, there is currently no method for selecting the optimal gate position for injection molding based on the surface grid, except for simple iterative simulation calculation of the gate position using the existing CAE software. Related research

Method used

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  • Plastic injecting and shaping sprue location determining method based on surface mesh
  • Plastic injecting and shaping sprue location determining method based on surface mesh
  • Plastic injecting and shaping sprue location determining method based on surface mesh

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Embodiment Construction

[0072] The present invention successfully converts the surface grid model data into an undirected graph with weights by adopting simplified conditions, so that the flow length solution problem is transformed into the shortest path problem of the graph, and the flow length corresponding to each node is solved by using the shortest path method. On this basis, a Generic-HillClimbing hybrid optimization algorithm with constrained domain is established, which can search for the best gate position in the product space.

[0073] Such as figure 1 Shown, the specific implementation steps of the inventive method are:

[0074] (1) Generate surface mesh

[0075] According to the geometric modeling of the part, the surface mesh of the part is generated by the mesh generation tool, and the coordinate value range of the surface mesh node is obtained by comparing the coordinate values ​​of the surface mesh node, that is, the maximum value and the minimum value of the coordinate value of the ...

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Abstract

The invention belongs to the field of plastic injection and shaping, in particular to a plastic injecting and shaping sprue location determining method based on a surface mesh. The method directly converts a surface mesh output by a mesh generating tool into an undigraph with weight, which ensures that complicated fusant flowing length solving problems are converted into a shortest path solving problems of the top in the undigraph; by combining the advantages of a genetic algorithm and a hill climbing algorithm, a Generic-Hill Climbing method is built to search optimum single or multiple gatelocations. The invention has the advantages that the invention directly utilizes surface mesh calculation to break through data model limitation and adopts the Generic-Hill Climbing method to search,which provides efficient and accurate result; the method of the invention not only can calculate the single optimum gate position, but also can calculate multiple gate position combination.

Description

technical field [0001] The invention belongs to the field of plastic injection molding, and relates to a method for determining the optimal gate position of plastic injection molding, and more specifically relates to the determination of the optimal gate position of plastic injection molding based on surface grids. Background technique [0002] Gate position selection is one of the most important factors affecting the quality of injection products. Improper positioning may lead to serious product defects such as overfilling, warping, stagnation, etc. Application of injection molding CAE software to assist designers to select the gate location is the main design method at present. Analysts first select several gate locations based on experience or experimental design methods, then analyze and compare the simulation result data obtained through calculation, and select a better one. This method relies too much on the designer's experience and is not efficient. Therefore, on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/27G05B13/00
Inventor 李德群李阳周华民赵朋崔树标严波
Owner HUAZHONG UNIV OF SCI & TECH
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