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A kind of composite material shell and preparation method thereof

A composite material and composite material layer technology, applied in the field of composite material shell and its preparation, can solve the problems of huge investment in equipment, heavy weight, and low structural efficiency

Active Publication Date: 2021-01-22
NORTH CHINA INST OF AEROSPACE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the vehicle-mounted composite material pressure vessels in the civil field include three-type metal-lined composite material gas cylinders and four-type plastic-lined composite material gas cylinders. Due to the use of metal inner liners, type-three composite material gas cylinders are heavy in weight and structurally efficient. lower
The four-type gas cylinder is currently being researched in China and has not yet been mass-produced, and the plastic inner lining is formed by blow molding, rotational molding or injection molding. The material selection method is limited, and the investment in equipment is huge, which limits its application.

Method used

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  • A kind of composite material shell and preparation method thereof
  • A kind of composite material shell and preparation method thereof
  • A kind of composite material shell and preparation method thereof

Examples

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preparation example Construction

[0029] The embodiment of the present invention also provides a method for preparing the above-mentioned composite material shell, comprising the following steps:

[0030] Prepare the sand core mold matrix, pre-embed at least one joint on one end of the sand core mold matrix, and then assemble with the connecting rod to obtain the sand core mold,

[0031] Spray the inner lining layer material on the outer surface of the sand core mold, heat and solidify for the first time, and cool down to obtain the inner lining layer.

[0032] The composite material layer is made by winding the prepreg tape on the outer surface of the inner liner,

[0033] Wrap the heat-shrinkable tape on the outer surface of the composite material layer to make the heat-shrinkable tape layer, heat and solidify and cool for the second time,

[0034] Remove the surface heat-shrinkable tape layer, remove the connecting rod, and rinse the inner sand core mold base with hot water to obtain a composite material s...

Embodiment 1

[0053] A composite shell

[0054] see figure 1 , the structure of the composite material shell includes: a barrel section and at least one joint for medium in and out provided on one end of the barrel section. Among them, the cylinder body section is a cylindrical structure of revolution, which is composed of a straight cylinder section and heads at both ends of the straight cylinder section, and the shape and surface curve of the head is an ellipse.

[0055] The composition of the barrel section of the composite material shell includes: an inner lining layer and a composite material layer on the surface of the inner lining layer. Among them, the material of the inner lining layer is silicone rubber, the thickness of the barrel section of the inner lining layer is 2mm, and the thickness of the joint position is 3mm. It is constructed in an alternate winding manner, and the thickness of the composite material layer is 2mm.

Embodiment 2

[0057] A composite shell

[0058] see figure 1 , the structure of the composite material shell includes: a barrel section and at least one joint for medium in and out provided on one end of the barrel section. Among them, the cylinder body section is a cylindrical structure of revolution, which is composed of a straight cylinder section and heads at both ends of the straight cylinder section. The shape and surface curve of the head is spherical.

[0059] The composition of the barrel section of the composite material shell includes: an inner lining layer and a composite material layer on the surface of the inner lining layer. Among them, the material of the inner lining layer is epoxy resin, the thickness of the barrel section of the inner lining layer is 3mm, and the thickness of the joint position is 5mm. It is formed in a helical and alternate winding manner, and the thickness of the composite material layer is 15mm.

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Abstract

The invention discloses a composite shell and a preparation method thereof. The inner surface of the composite shell is an inner lining layer. The outer surface of the inner lining layer is solidifiedwith a composite layer formed by prepreg tape winding. At least one joint is arranged at one end of the composite shell, and the joint communicates with the interior of the composite shell. The preparation method of a composite adopts a sand core mould combined with prepreg tape winding process, and a heating system is added, so that the shell prepared has better performance than a traditional shell.

Description

technical field [0001] The invention relates to the technical field of composite material shells, and in particular to a composite material shell and a preparation method thereof. Background technique [0002] Fiber-reinforced resin-based composite materials, especially carbon fiber-reinforced composite materials, have been widely used due to their high specific strength and specific modulus, especially for composite pressure vessels that mainly withstand internal pressure. Composite material shells were first used in pressure vessels, mainly engine shells, with a rubber lining structure, and then gradually expanded to vehicle-mounted composite material pressure vessels in the civilian field. [0003] At present, the vehicle-mounted composite material pressure vessels in the civil field include three-type metal-lined composite material gas cylinders and four-type plastic-lined composite material gas cylinders. Due to the use of metal inner liners, type-three composite materi...

Claims

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Application Information

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IPC IPC(8): F17C1/00
CPCF17C1/00F17C2203/0602
Inventor 林松
Owner NORTH CHINA INST OF AEROSPACE ENG
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