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Sample making method for carbon fiber interlayer shearing strength test, and special die therefor

A technology of shear strength and carbon fiber layer, which is applied in the field of special molds for sample preparation methods, can solve the problems of complex process, uneven glue content in sample preparation, long process flow, etc., and achieves cost reduction, high toughness, and convenient industrial processing. Effect

Active Publication Date: 2015-02-25
安徽首文碳纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used sample preparation method process is as follows: first put the carbon fiber tow into the dipping tank through the wire release roller, and then wind the roller to make a unidirectional prepreg cloth. After the prepreg cloth is dried, it is cut, laminated and heated. Pressing to make a flat plate, and then machining to make a sample. It takes more than 10 hours to complete the whole process. Not only is the process long and complicated, but the prepared sample is prone to uneven glue content.

Method used

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  • Sample making method for carbon fiber interlayer shearing strength test, and special die therefor
  • Sample making method for carbon fiber interlayer shearing strength test, and special die therefor
  • Sample making method for carbon fiber interlayer shearing strength test, and special die therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The sample preparation method of carbon fiber interlaminar shear strength test comprises the following steps:

[0043] Step a): Take 20 carbon fiber tows with a length of 40 cm and spread them on the release paper in turn;

[0044] Step b): Dip the prepared epoxy resin with a brush or a brush with a width of 2-8 cm to paint on both sides of the carbon fiber tow, so that both sides of the carbon fiber tow are evenly coated with epoxy resin;

[0045]Step c): first spray the release agent on the groove 14 and the boss 22 of the mold, then put the carbon fiber tow coated with epoxy resin into the groove 14 of the mold with a length of 16cm, and paint the epoxy resin The two ends of the carbon fiber tow of the resin protrude from both sides of the base 1, each carbon fiber tow is manually straightened in turn, and the piston 2 of the mold is matched with the base 1 to squeeze the carbon fiber tow and epoxy resin in the groove 14, Squeeze out the air and excess epoxy resin i...

Embodiment 2

[0050] The sample preparation method of carbon fiber interlaminar shear strength test comprises the following steps:

[0051] Step a): Take 25 carbon fiber tows with a length of 50 cm and spread them on the release paper in turn;

[0052] Step b): Dip the prepared epoxy resin with a brush or a brush with a width of 2-8 cm to paint on both sides of the carbon fiber tow, so that both sides of the carbon fiber tow are evenly coated with epoxy resin;

[0053] Step c): first spray the release agent on the groove 14 and the boss 22 of the mold, and then put the carbon fiber tows coated with epoxy resin into the groove 14 of the mold with a length of 20cm, and paint the epoxy resin The two ends of the carbon fiber tow of the resin protrude from both sides of the base 1, each carbon fiber tow is manually straightened in turn, and the piston 2 of the mold is matched with the base 1 to squeeze the carbon fiber tow and epoxy resin in the groove 14, Squeeze out the air and excess epoxy r...

Embodiment 3

[0058] The sample preparation method of carbon fiber interlaminar shear strength test comprises the following steps:

[0059] Step a): Take 30 carbon fiber tows with a length of 60 cm and spread them on the release paper in turn;

[0060] Step b): Dip the prepared epoxy resin with a brush or a brush with a width of 2-8 cm to paint on both sides of the carbon fiber tow, so that both sides of the carbon fiber tow are evenly coated with epoxy resin;

[0061] Step c): first spray the release agent on the groove 14 and the boss 22 of the mold, then put the carbon fiber tow coated with epoxy resin into the groove 14 of the mold with a length of 24cm, and paint the epoxy resin The two ends of the carbon fiber tow of the resin protrude from both sides of the base 1, each carbon fiber tow is manually straightened in turn, and the piston 2 of the mold is matched with the base 1 to squeeze the carbon fiber tow and epoxy resin in the groove 14, Squeeze out the air and excess epoxy resin ...

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Abstract

The invention provides a sample making method for carbon fiber interlayer shearing strength test, and a special die therefor. The method comprises the following steps: brushing carbon fiber filament bundles with an epoxy resin, putting the obtained carbon fiber filament bundles in the die, carrying out baking curing, and cooling to complete a sample making operation. The method has the advantages of simplicity and easy operation of the sample making operation, substantial shortening of the time of manual work, and realization of the balanced distribution of the carbon fiber filament bundles in the obtained sample. The die comprises a pedestal, a piston and a C-shaped clamp; the upper end surface of the pedestal is provided with a groove penetrating through the front and back sides of the pedestal, the piston is formed by an upper cover arranged at the upper portion and a boss having a lower end aligned with a pedestal groove, the height of the boss is smaller than the depth of the pedestal groove, and the C-shaped clamp fixes the pedestal and the piston which are installed in a fit mode. The die completely accords with the demands of the method, has a simple structure and is convenient to process.

Description

technical field [0001] The invention relates to a sample preparation method for the carbon fiber interlayer shear strength test; the invention also relates to a special mold for the sample preparation method for the carbon fiber interlayer shear strength test. Background technique [0002] Carbon fiber is a new type of high-performance fiber material with a carbon content of more than 92%. It has many excellent properties such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance, electrical conductivity, thermal conductivity and far-infrared radiation. , widely used in aerospace, military defense, sports equipment and industrial fields, is an important strategic basic material of the country. [0003] As a brittle material, carbon fiber is rarely used alone, and is mostly combined with epoxy resin to make composite materials to give full play to its excellent performance. The interlayer shear strength of car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/44
Inventor 刘化虎郭光陈群杨成其杜亮吴伟宋会青潘威
Owner 安徽首文碳纤维有限公司