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Integral impacting type composite canister cover

A composite material film and main material technology, which is applied in the field of integral breakthrough composite material film cover, can solve the problems of complex process, low pressure bearing capacity, and overall strength decrease, and achieve the effects of simple production process, simple structure and rapid response.

Inactive Publication Date: 2010-05-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of film cover has a complex structure, the main body and the frame are glued together with pure resin, the pressure bearing capacity is small, and the weak area connected with pure resin is difficult to manufacture and the process is complicated
Bubbles are inevitably brought into the resin area during the molding process, and internal defects are easily formed in the weak area, resulting in a decrease in overall strength and unsatisfactory quality stability
The internal and external structure of the film cover is asymmetrical, and the internal and external pressure bearing capacity is inconsistent. Therefore, the practical application of this type of film cover has certain limitations.

Method used

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  • Integral impacting type composite canister cover
  • Integral impacting type composite canister cover
  • Integral impacting type composite canister cover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment is a manufacturing process of a film cover. The film cover is formed by hand lay-up + compression molding process, and the film cover is completed after three times of molding and curing. According to the design plan, the forming mold adopts the form of upper and lower molds, and the molds are as follows: Figure 4 , 5 As shown, one side of the lower mold has a bump for prefabricated scoring on its circumference, and the other side is a smooth flat plate.

[0022] Film cover structure

[0023] 1. The main body and frame of the film cover

[0024] It is composed of several layers of 0.2 plain woven glass cloth and epoxy resin, and the laminate is [(0°90°)(±45°)(0°90°)(±45°)] quasi-isotropic symmetrical structure ;

[0025] 2. Structural form of weak area

[0026] The main body and the frame are directly glued together, which is a circle of glue layer, and 1-3 layers of 0.1 plain weave glass cloth strips are pasted on the upper and lower surfaces, an...

Embodiment 2

[0062] This embodiment is a specific process of a film cover burst test. The test device is as follows: Figure 6 As shown. Install the membrane cover on the test cylinder as required, turn on the air compressor, turn off the air compressor after the pressure reaches 0.8MPa, open the inlet valve to charge slowly and carefully observe the deformation of the membrane cover. After reaching a certain pressure, keep it for a period of time, observe whether the membrane cover has any sound, whether there is delamination, and at the same time observe whether the reading of the pressure gauge drops during the pressure holding process, and then unload it to 0.00MPa, and observe whether the membrane cover has residual deformation, whether there is Damage. Repeat the above process to observe the deformation of the membrane cover and the residual deformation after unloading. After confirming that there is no damage and the air tightness is good, perform the membrane cover breakthrough test...

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Abstract

The invention relates to an integrated impact composite film cover, belonging to the missile emit technique. Wherein, said film cover uses glass fiber and epoxy resin as main raw materials, while theinner surface is adhered with aluminum foil as the electromagnetic shield layer; it is characterized in that: form outer to inner, it comprises a frame (1), a weal section (2), and main body (3), while the main body (3) is layered by the method that [(0degree90degree)(+- 45degree)(0degree90degree)(+-45degree)] with isotropy plates, to form the same periphery strength, and it is adhered to the frame (1); the adhering part is the weak section (2); the upper and lower surface of said adhering part are adhered with cloth or cloth bar to strengthen the weak section (2). The invention can adjust thestrength of weak section via adjusting the layer number and width, to meet the demand of different pressures. The invention has simple structure and simple process.

Description

technical field [0001] The invention relates to an integral breakthrough composite material film cover, which belongs to the technical field of missile launching. Background technique [0002] The design of the missile launch cover is one of the important factors affecting the rapid response ability of the missile. Therefore, when developing the missile storage and transportation launch box, the design of the box cover is very important. The main requirements are that it can withstand a certain pressure difference, have good sealing performance, and open quickly when launching a missile. In order to meet the above-mentioned requirements, the missile launch box cover used to use mechanical covers, explosive bolts to open the covers, etc., referring to US Pat. The hydraulic system is required to open the cover, and the mechanism is complex, which not only increases the weight of the box and delays the operation time, but the response of the explosive cover is faster than tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F41F3/077
CPCF41F3/077
Inventor 周光明王新峰袁卓伟于殿君
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS