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Composite material mold pressing forming method, self-pressurizing device and mold pressing forming device

A technology of compression molding and pressurization device, which is applied in the field of composite material molding, can solve the problems of warping of molded products and inability to cure prepregs at the same time, and achieve good versatility

Inactive Publication Date: 2019-12-20
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The second object of the present invention is to provide a compression molding equipment for composite material compression molding process, which solves the problem that the existing compression molding equipment can easily cause the prepreg to be cured at the same time, resulting in irreversible warping of the molded product
[0006] The third object of the present invention is to provide a composite material compression molding method to solve the problem of irreversible warping of the molded product due to the inability of the prepreg to be cured at the same time in the existing process

Method used

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  • Composite material mold pressing forming method, self-pressurizing device and mold pressing forming device
  • Composite material mold pressing forming method, self-pressurizing device and mold pressing forming device
  • Composite material mold pressing forming method, self-pressurizing device and mold pressing forming device

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Experimental program
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Effect test

Embodiment 1

[0037] like Figure 1-Figure 3 As shown, the self-pressurizing device used in the compression molding process provided by the embodiment of the present invention includes a pressure member 1, a bolt 2 and a nut 3, wherein the pressure member 1 includes a plurality of cantilevers 11, and one end of the cantilever 11 is a connecting end The other end is a free end. From the connecting end of the cantilever to the free end, the area of ​​the cross section of the cantilever 11 becomes smaller gradually, so that the bottom surface of the cantilever 11 is gradually inclined upward. through holes, a plurality of cantilever arms 11 are evenly distributed in the circumferential direction and the connection ends of each cantilever arm 11 are connected to each other to form a cantilever connection part 12, that is, a plurality of cantilever arms 11 are arranged at an angle to each other, and the distance between two adjacent cantilever arms 11 same angle.

[0038] During use, the pressure...

Embodiment 2

[0046] like Figure 4 As shown, the second embodiment is basically the same as the first embodiment, and the similarities will not be repeated. The difference is that in this embodiment, at least one strain gauge 13 is arranged on the upper surface of one cantilever 11 to detect the deflection of the cantilever 11 , and further obtain the magnitude of the pressure exerted by the cantilever 11 on the molding die 5 . Preferably, the strain gauge 13 is a high temperature strain gauge.

[0047] It should be noted that the use of the strain gauge 13 to detect the change in the deflection of the object to be tested and to measure the pressure is a prior art, for example, the strain gauge and the strain gauge cooperate to read data.

Embodiment 3

[0049] like Figure 5 As shown, the third embodiment is basically the same as the second embodiment, and the similarities will not be repeated. The difference is that the self-pressurizing device is applied to the circular mold, and the pressing member 1 has three cantilevers 11, and each Each cantilever 11 is provided with a strain gauge 13, so that the pressure exerted by the cantilever 11 on the molding die 5 can be measured more accurately.

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PUM

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Abstract

The invention relates to the technical field of mold pressing forming, in particular to a composite material mold pressing forming method, a self-pressurizing device and a mold pressing forming device. According to the self-pressurizing device, a pressurizing part with a plurality of variable cross-section cantilevers and a bolt and a nut are matched, pressure is continuously applied to a formingmold for uniform pressure, the mold pressing forming process is separated from a pressing machine, more suitable heating modes can be selected for heating the forming mold, forming molds with different shapes can be adapted, and universality is good. On the basis, the mold pressing forming device and the mold pressing forming method are improved, the self-pressurizing device is used for providingcontinuous and uniform pressure for the forming mold, so that a stable heating environment is provided for the forming mold by using a drying oven, and the problem of irreversible warping caused by the fact that the prepreg in the forming mold cannot be cured at the same time due to the temperature gradient is solved.

Description

technical field [0001] The invention relates to the technical field of composite material molding, in particular to a composite material compression molding method, a self-pressurizing device, and compression molding equipment. Background technique [0002] Compression molding is the most widely used composite molding process. This process is a molding process in which fiber prepreg is placed in a metal mold and pressed into a composite product under a certain temperature and pressure. [0003] In the compression molding process, a press is usually used to apply pressure and heat to the mold. Since the heating plate of the press is located on its pressing plate, heat will be lost due to the temperature difference between the mold and the surrounding environment during the process of heat transfer from the upper and lower surfaces of the mold to the center of the mold. The thicker the mold and the higher the heating temperature, the more heat is lost. Based on the above re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/46B29C33/22B29C35/02B29C70/54
CPCB29C33/22B29C35/02B29C70/46B29C70/54
Inventor 井文奇杜逸飞张涛陈磊魏洪峰李卓达
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH