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Method for testing performance of mold pressing premixed material

A test method and premix technology, applied in the direction of removing certain components and weighing, can solve the problems of limited test items, low test accuracy, and high test cost, so as to improve test items, ensure reliability, and reduce production. cost effect

Inactive Publication Date: 2013-04-17
INNER MONGOLIA AEROSPACE HONGGANG MACHINERY
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AI Technical Summary

Problems solved by technology

The premix is ​​solidified into molded products by high-temperature and high-pressure molding. The performance test has been using traditional acetone chemical immersion and physical burning in a Moford furnace. The test items are limited and this test method requires a long cycle and high test cost. low precision

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  • Method for testing performance of mold pressing premixed material

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0027] see figure 1 .

[0028] The present invention adopts thermogravimetric analysis and chemical combined testing method (abbreviated as "thermal-chemical method"). The thermal-chemical method is an efficient and comprehensive test method combining physics and chemistry, which includes the thermogravimetric analysis stage and the chemical test stage. This test method makes up for the shortcomings of the traditional test method and improves the performance test items of the molded premix. Specifically, a thermogravimetric instrument is used to test the program section of heating and heat preservation at different temperature sections, and read out the mass reduction of each stage from the thermogravimetric analysis curve of the test, and then use the mass reduction of each stage Calculate the volatile content, resin content, and fiber content by comparing...

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Abstract

The invention discloses a method for testing performance of a mold pressing premixed material. The method comprises the following steps of: testing the mold pressing premixed material through the procedures of heating and heat retaining at different temperature sections by a thermal weight loss instrument particularly; reading the decreased amount of quality of the material at each stage respectively from a tested thermal weight loss analysis curve; comparing the decreased amount of the quality of the material at each stage with the quality of a sample, thereby obtaining volatile matters, resin content and fiber content; and finally calculating the cure degree of the material according to data of the volatile matters and the resin content obtained by a chemical method of soaking dissoluble resin on the mold pressing premixed material by acetone. The method provided by the invention makes up the defects of the conventional test method for testing the performance of the mold pressing premixed material, improves test items, guarantees the reliability of a mold pressing product as a main heat insulation material of a spaceflight solid rocket engine, provides accurate performance parameter basis for the production of the mold pressing product, improves production efficiency, lowers production costs, and guarantees the smooth operation of a lot production task.

Description

technical field [0001] The invention relates to a material performance testing method, in particular to a molding premix performance testing method. Background technique [0002] Molding premix is ​​prepared by mixing chopped high-silica fiber and phenolic resin in a certain proportion. It is the main raw material for molded products used for heat insulation of rocket engine structural parts. The premix is ​​solidified into molded products by high-temperature and high-pressure molding. The performance test has been using traditional acetone chemical immersion and physical burning in a Moford furnace. The test items are limited and this test method requires a long cycle and high test cost. Low precision. [0003] The performance test of the molded premix is ​​an important task to ensure the quality of the molded product, so it is necessary to find and perfect a new and effective method for the performance test of the molded premix. Contents of the invention [0004] The i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
Inventor 高心爱
Owner INNER MONGOLIA AEROSPACE HONGGANG MACHINERY
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