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Carbon fiber shell surface penetration type pore and crack repairing structure and process

A carbon fiber and pore technology, applied in the field of repairing structure and repairing process, can solve the problems of limitation, difficulty in immersing into the deep layer of carbon fiber shell, easy occurrence of pores and cracks, etc., and achieve the effect of small weight gain, strong applicability and application prospect.

Pending Publication Date: 2020-04-03
上海伽材新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual processing process, the quality of complex-shaped carbon fiber shells is affected by many factors including layering, heating, and pressurization. It is difficult to achieve precise control, and defects such as pores and cracks are prone to appear, resulting in airtight shell Therefore, in addition to ensuring product quality during the molding process, the repair of defective products is also an important part of the carbon fiber product manufacturing process
The current common airtight repair scheme for carbon fiber shells is generally to coat structural glue or resin on the inner surface of the carbon fiber shell, and then paste several layers of glass cloth to strengthen the structure of the repaired part. In this repair scheme, resin or Structural glue is only applied on the surface of carbon fiber, so it is difficult to penetrate into the deep layer of carbon fiber shell, and the bonding strength between the repaired part and the original shell is relatively poor; at the same time, there will be residual resin and obvious repair marks on the surface, and some products require internal and external surfaces cannot be applied in , limiting the implementation of this fix

Method used

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  • Carbon fiber shell surface penetration type pore and crack repairing structure and process
  • Carbon fiber shell surface penetration type pore and crack repairing structure and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Use masking tape to protect the inner and outer surfaces near the place to be repaired, and use sealing tape to block the threaded holes near the repaired place;

[0054] (2) Dip the paint remover with a cotton swab and apply it on the inner and outer surfaces of the part to be repaired, let it stand for 2 minutes, scrape off the paint surface gently with a blade, and then use 400# sandpaper to roughen the inner and outer surfaces;

[0055] (3) Prepare 3g of resin according to the ratio of resin:curing agent=2:1, wherein the resin is a medium-temperature curing epoxy resin, the curing temperature is 80°C, add 0.1g of carbon powder, and mix thoroughly until the color of the resin is black;

[0056] (4) Apply the prepared resin on the inner surface of the repaired part, install an air nozzle on the outer surface, and spread a vacuum bag on the outer surface;

[0057] (5) Use an air pump to vacuum for 1 minute, observe that the resin has penetrated into the outer surfa...

Embodiment 2

[0060] (1) Use masking tape to protect the inner and outer surfaces near the place to be repaired, and use sealing tape to block the threaded holes near the repaired place;

[0061] (2) Dip the paint remover with a cotton swab and apply it on the inner and outer surfaces of the part to be repaired, let it stand for 2 minutes, scrape off the paint surface gently with a blade, and then use 400# sandpaper to roughen the inner and outer surfaces;

[0062] (3) Prepare 3g of resin according to the ratio of resin:curing agent=2:1, wherein the resin is a medium-temperature curing epoxy resin, the curing temperature is 80°C, add 0.1g of carbon powder, and mix thoroughly until the color of the resin is black;

[0063] (4) Fill the prepared resin into the inner surface of the repaired part, install an air nozzle on the outer surface, and spread a vacuum bag on the outer surface;

[0064] (5) Use an air pump to vacuum for 1 minute, observe that the resin has penetrated into the outer surf...

Embodiment 3

[0067] (1) Use masking tape to protect the inner and outer surfaces near the place to be repaired, and use sealing tape to block the threaded holes near the repaired place;

[0068] (2) Dip the paint remover with a cotton swab and apply it on the outer surface of the part to be repaired, let it stand for 2 minutes, scrape off the paint surface gently with a blade, and then use 400# sandpaper to roughen the inner and outer surfaces;

[0069] (3) Prepare 3g of resin according to the ratio of resin:curing agent=2:1, wherein the resin is a medium-temperature curing epoxy resin, the curing temperature is 80°C, add 0.1g of carbon powder, and mix thoroughly until the color of the resin is black;

[0070] (4) Apply the prepared resin on the inner surface of the repaired part, install air nozzles on the outer surface, and spread vacuum bags on the inner and outer surfaces;

[0071] (5) Use an air pump to vacuum for 1 minute, observe that the resin has penetrated into the outer surface ...

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Abstract

The invention relates to a carbon fiber shell surface penetration type pore and crack repairing structure and process. The repairing structure comprises carbon fibers to be repaired, pores to be repaired, vacuum bags, glue absorbing cotton, shielding adhesive tape, resin or structural glue, sealing rubber strips and the like. The repairing process comprises the following steps of 1, shielding thesurface around the repaired area by using the shielding adhesive tape, and filling holes nearby by using the sealing rubber strips; 2, removing the paint surface of the repaired area by using a paintremover; 3, blending resin or structural glue according to a certain proportion; 4, coating the inner surface of the repaired area with resin or structural glue, and laying a vacuum bag on the outer surface; 5, connecting a vacuum pump, vacuumizing the repaired position, and removing redundant resin after finishing; and 6, placing a shell in an oven to be baked to completely cure the resin. The negative pressure brought by vacuumizing is used for enabling the resin to penetrate into the carbon layer so as to repair cracks and pores in the carbon layer, and meanwhile it is ensured that the repaired position has certain strength.

Description

technical field [0001] The present invention relates to a repairing structure and repairing process, in particular to a repairing structure for penetrating pores and cracks on the surface of a carbon fiber shell that enhances the bonding strength between the repaired part and the original shell by vacuuming the resin into the entire carbon layer and Repair process. Background technique [0002] Carbon fiber products have excellent mechanical properties of high strength and high modulus, so carbon fiber shells have been widely used in various high-tech fields. In order to protect precision instruments in harsh working environments, such carbon fiber shells are usually It is not only necessary to ensure the mechanical properties, but also has strict requirements on the airtight performance of the shell. However, in the actual processing process, the quality of complex-shaped carbon fiber shells is affected by many factors including layering, heating, and pressurization. It is...

Claims

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Application Information

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IPC IPC(8): B29C73/02B29C73/26B29C73/24B29C70/34
CPCB29C73/02B29C73/24B29C73/26B29C70/342B29C2073/262
Inventor 苑玲万君谈天羽
Owner 上海伽材新材料科技有限公司
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