Method for manufacturing shape memory polymer core mold by winding composite material component

A composite material component and memory polymer technology, which is applied in the field of manufacturing a shape memory polymer core mold for composite material component winding molding, can solve the problem that the core mold assembly, dismantling and deformation cannot meet the composite material winding technology, and the application range is limited. Limitation, brittle gypsum layer, etc., to avoid manual assembly and disassembly procedures, obvious economic benefits, and short production cycle.

Active Publication Date: 2012-06-27
XIAN AEROSPACE COMPOSITE MATERIALS INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of the combined mandrel is that the skeleton can be reused, but its structure is complex, no matter disassembly or scraping of the gypsum layer requires manual operation, the degree of mechanization is low, and the gypsum layer is very brittle, easy to crack, and the yield of the mandrel is not high.
The biggest advantage of the water-soluble sand mandrel over the metal composite mandrel is that it is easier to remove from the composite material product, but the excessive weight of the mandrel has always been the key to restricting the development of the water-soluble sand mandrel, and its manufacturing process is mostly manual operation. The efficiency is very low, which also restricts its development
The metal mandr

Method used

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  • Method for manufacturing shape memory polymer core mold by winding composite material component
  • Method for manufacturing shape memory polymer core mold by winding composite material component
  • Method for manufacturing shape memory polymer core mold by winding composite material component

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of shape memory polymer mandrel for composite pressure vessel winding molding:

[0030] Step 1, prepare the hydrogenated epoxy resin system: put the hydrogenated epoxy resin, hexanediol diglycidyl ether and maleic anhydride into a vacuum drying oven after mixing uniformly in a molar ratio of 0.9:0.1:2.0, and put them in a vacuum oven at a temperature of Remove bubbles at 55°C for 10 minutes to obtain a hydrogenated epoxy resin system;

[0031] Step 2. Making hydrogenated epoxy resin blanks: pour the hydrogenated epoxy resin system described in step 1 into a cylindrical mold, then place the poured mold in an oven to solidify, and demould after cooling to room temperature to obtain a hydrogenated ring Oxygen resin blank; the curing system is: curing at a temperature of 80°C for 3 hours, then at a temperature of 120°C for 3 hours, and finally at a temperature of 180°C for 1 hour; figure 1 As shown, the cylindrical mold is formed by connecting a cylindrical mal...

Embodiment 2

[0036] Preparation of shape memory polymer mandrel for composite pipe winding molding:

[0037] Step 1, prepare the hydrogenated epoxy resin system: put the hydrogenated epoxy resin, hexanediol diglycidyl ether and maleic anhydride into a vacuum drying oven after mixing uniformly in a molar ratio of 0.6:0.3:2.0, and put them in a vacuum oven at a temperature of Remove bubbles at 50°C for 5 minutes to obtain a hydrogenated epoxy resin system;

[0038] Step 2. Making hydrogenated epoxy resin blanks: pour the hydrogenated epoxy resin system described in step 1 into a cylindrical mold, then place the poured mold in an oven to solidify, and demould after cooling to room temperature to obtain a hydrogenated ring Oxygen resin blank; the curing system is: curing at a temperature of 65°C for 3 hours, then at a temperature of 120°C for 3 hours, and finally at a temperature of 150°C for 1 hour; figure 1 As shown, the cylindrical mold is formed by connecting a cylindrical male mold 1 and...

Embodiment 3

[0043] Preparation of shape memory polymer mandrel for composite pressure vessel winding molding:

[0044] Step 1. Preparation of hydrogenated epoxy resin system: mix hydrogenated epoxy resin and maleic anhydride in a molar ratio of 1.0:2.0, put them in a vacuum drying oven, and remove air bubbles for 15 minutes at a temperature of 60°C. Obtain hydrogenated epoxy resin system;

[0045] Step 2. Making hydrogenated epoxy resin blanks: pour the hydrogenated epoxy resin system described in step 1 into a cylindrical mold, then place the poured mold in an oven to solidify, and demould after cooling to room temperature to obtain a hydrogenated ring Oxygen resin blank; the curing system is: curing at a temperature of 60°C for 4 hours, then at a temperature of 110°C for 4 hours, and finally at a temperature of 160°C for 1.5 hours; figure 1 As shown, the cylindrical mold is formed by connecting a cylindrical male mold 1 and a cylindrical female mold 2 by bolts;

[0046] Step 3, making...

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Abstract

The invention discloses a method for manufacturing a shape memory polymer core mold by winding a composite material component. The method comprises the following steps of: 1, uniformly mixing hydrogenated epoxy resin, hexanediol diglycidyl ether and maleic anhydride according to the molar ratio of 0.5-1.0:0-0.4:2.0, and adding the mixture into a vacuum drying box to remove bubbles to obtain a hydrogenated epoxy resin system; 2, casting the hydrogenated epoxy resin system into a cylindrical mold, placing the cast mold in an oven to be cured, after cooling the mold to room temperature, demolding to obtain a hydrogenated epoxy resin blank; and 3, selecting a core mold shaping mold according to the shape of the required core mold, assembling the hydrogenated epoxy resin blank and the core mold shaping mold, deforming the hydrogenated epoxy resin blank into the shape of the core mold through a blow-moulding process, and cooling the hydrogenated epoxy resin blank to obtain the shape memory polymer core mold. The shape memory polymer core mold manufactured by the method is low in cost, high in efficiency and short in manufacturing period, can be repeatedly used and has obvious economic benefit; and demolding is convenient to perform.

Description

technical field [0001] The invention belongs to the technical field of mandrel making, and in particular relates to a method for making a shape-memory polymer mandrel for composite material member winding molding. Background technique [0002] Filament winding molding technology refers to the process technology in which continuous fibers are impregnated with resin glue, wound on the mandrel according to certain rules under a certain tension, and then cured and formed. There are three winding forms: dry method, wet method and semi-dry method. It is suitable for the manufacture of cylinders, cylinders, spheres and certain positive curvature rotary products. This molding technology has the advantages of high fiber content, good fiber strength, changeable fiber winding direction and suitable for mass production. It has a wide range of applications in aerospace and civil fields. [0003] The mandrel for winding molding of composite components directly affects the dimensional ac...

Claims

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Application Information

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IPC IPC(8): B29C39/02B29C39/38
Inventor 张世杰周伟江廖英强高克洲张晓虎程勇李锵张阳
Owner XIAN AEROSPACE COMPOSITE MATERIALS INST
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