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Method for visually testing internal molding shrinkage characteristic of high polymer material

A polymer material, molding shrinkage technology, applied in the analysis of materials, material analysis by optical means, measuring devices, etc., can solve the quantitative determination and analysis of the inability to mold shrinkage, and restrict the improvement and development of precision molding technology, etc. problems, to achieve the effect of improving the level of research

Inactive Publication Date: 2013-02-13
DALIAN UNIV OF TECH
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Problems solved by technology

[0004] But so far, the current measurement methods for the molding shrinkage of polymer materials are limited to the analysis and observation of the external dimensions of the molded products, and cannot quantitatively measure and analyze the molding shrinkage of different parts inside the product.
At present, there is no public report on the method of measuring the internal molding shrinkage characteristics of molded products by using visualization methods, which largely restricts the perfection and development of precision molding technology

Method used

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  • Method for visually testing internal molding shrinkage characteristic of high polymer material
  • Method for visually testing internal molding shrinkage characteristic of high polymer material
  • Method for visually testing internal molding shrinkage characteristic of high polymer material

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Embodiment Construction

[0029] The best embodiment of the present invention will be described in detail below in conjunction with technical solutions and accompanying drawings.

[0030] This example is used for the visual analysis of the internal shrinkage of the poured molded product of the polyurethane elastomer flat plate. The product is a rectangular parallelepiped plate with a size of 170×100×10mm.

[0031] Embodiment steps are as follows:

[0032] 1) In the experiment, take the mold cavity as a reference scale, and record the images of the product before molding and curing and after curing and stabilization;

[0033] 2) Divide the product area equally in the form of 8×6 grids (length×width) in Photoshop, and then select 3 to 4 relatively clear feature points in each grid by using the two pictures as a mutual reference, and pay attention to ensuring the feature points Uniformity of bit distribution;

[0034] 3) Measure the coordinate position of each side of the product, and determine the coor...

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Abstract

The invention discloses a method for visually testing the internal molding shrinkage characteristic of a high polymer material, belonging to the field of high polymer molding. Through the change of the positions (before and after a product is shrunk) of characteristic points such as active carbon particles, hollow glass beeds and toners which are added into the product, with a static visualization means, the internal shrinkage distribution of the product is calculated by using specific image processing software in a coordinate mode, and the orientation distribution of the internal shrinkage of the product is systematically reflected in a mode that two-dimensional curves, contour line cloud charts and vector distribution diagrams are combined, so that the change rule of the internal shrinkage of the product is found, the molding shrinkage mechanism is discussed, and thereby the development of a precise molding technique of the high polymer material is promoted.

Description

technical field [0001] The invention belongs to the field of polymer molding, and relates to a method for visually measuring the internal shrinkage characteristics of polymer material molded products. Background technique [0002] Molding, as an important means of forming polymer materials, plays an important role in the national economy. With the development of economy and science and technology, the application of precision polymer products is more and more extensive, precision molding technology has been highly valued, and the molding shrinkage of products is the key factor determining the precision and pass rate of polymer molded products. Therefore, it has always been a research hotspot in the field of polymer molding technology to comprehensively and reasonably measure the molding shrinkage characteristics of polymer material molding products, analyze the molding shrinkage mechanism of molded products, and control the molding accuracy of materials, and has attracted mu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/00G01B11/00G01B11/16
Inventor 姜开宇段飞王敏杰李豪
Owner DALIAN UNIV OF TECH
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