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Crystalline CFRTP forming machining method

A forming processing and crystallization technology, which is applied in the field of forming processing of crystalline CFRTP, can solve the problems affecting the mechanical properties of CFRTP and weakening the fiber reinforcement in the resin, so as to avoid the problem of fiber bundle flow and improve the mechanical properties.

Active Publication Date: 2019-10-15
蚌埠景图智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, when CFRTP is formed, the forming pressure will force the reinforcing fibers to change the arrangement direction under the flow of resin, which seriously weakens the reinforcing effect of fibers in the resin and greatly affects the mechanical properties of CFRTP after forming.

Method used

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  • Crystalline CFRTP forming machining method

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Experimental program
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Effect test

Embodiment 1

[0041] This embodiment provides a forming and processing method for crystalline CFRTP. Since polyamide 6 is a crystalline polymer commonly used as a resin matrix for thermoplastic fiber-reinforced composite materials, this embodiment uses carbon fiber / polyamide 6 composite The board is the raw material for processing, and its DSC curve is as follows figure 1 As shown, it specifically includes the following steps:

[0042] Step (1) First, quench the carbon fiber / polyamide 6 composite board: heat the prepared carbon fiber / polyamide 6 composite board to 250°C and keep it warm for 15 minutes until the resin is completely melted, then quickly heat the carbon fiber / polyamide 6 composite board Put it between two normal temperature steel plates for rapid cooling. Through the rapid cooling of polyamide 6, the crystallization of polyamide 6 crystals is in different stages, thereby widening the melting range.

[0043] Step (2) Heating and deformation: After step (1), heat the carbon fi...

Embodiment 2

[0046] This embodiment provides a forming and processing method for crystalline CFRTP. Since polyamide 6 is a crystalline polymer commonly used as a resin matrix for thermoplastic fiber-reinforced composite materials, this embodiment uses carbon fiber / polyamide 6 composite The board is the raw material for processing, and the specific implementation includes the following steps:

[0047] Step (1) First, quench the carbon fiber / polyamide 6 composite board: heat the prepared carbon fiber / polyamide 6 composite board to 245°C and keep it warm for 20 minutes until the resin is completely melted, then quickly heat the carbon fiber / polyamide 6 composite board Quickly cool in coolant.

[0048] Step (2) Heating and deformation: After step (1), put the carbon fiber / polyamide 6 composite board and the mold into a vacuum bag, and seal the vacuum bag. Heat the vacuum bag as a whole at a heating rate of 5°C / min. When the temperature reaches 200°C, start to evacuate the vacuum bag and heat ...

Embodiment 3

[0051] This embodiment provides a forming and processing method for crystalline CFRTP. Since polyamide 6 is a crystalline polymer commonly used as a resin matrix for thermoplastic fiber-reinforced composite materials, this embodiment uses carbon fiber / polyamide 6 composite The board is the raw material for processing, and the specific implementation includes the following steps:

[0052] Step (1) First, quench the carbon fiber / polyamide 6 composite board: heat the prepared carbon fiber / polyamide 6 composite board to 250°C and keep it warm for 10 minutes until the resin is completely melted, then quickly heat the carbon fiber / polyamide 6 composite board Quickly cool in coolant.

[0053] Step (2) Heating and deformation: After step (1), put the carbon fiber / polyamide 6 composite board and the mold into a vacuum bag, and seal the vacuum bag. Heat the vacuum bag as a whole at a heating rate of 5°C / min. When the temperature reaches 200°C, start to evacuate the vacuum bag and heat ...

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Abstract

The invention provides a crystalline CFRTP forming machining method, and belongs to the field of composite material machining forming. The forming machining method comprises the steps that after CFRTPis heated to be in the complete melting state, the CFRTP is put into a cooling medium to be subjected to quenching treatment; after the cooled CFRTP is heated to be in the rubbery state, the CFRTP starts to be subjected to forming treatment and continues to be heated, and forming treatment of the CFRTP is completed before the CFRTP is completely melted; and after the formed CFRTP continues beingheated to be in the complete melting state, the CFRTP is naturally cooled. Through the forming machining method, preparing and forming of the CFRTP can be separated, and standardized implementation isfacilitated; and in the method, the forming temperature is lower than the complete melting temperature of resin, the situation that fiber bundles flow due to resin flowing is effectively avoided, andthe mechanical property of the formed CFRTP is improved.

Description

technical field [0001] The invention relates to the field of composite material processing, in particular to a forming and processing method of crystalline CFRTP. Background technique [0002] CFRTP, for continuous fiber reinforced thermoplastic composites. Thermoplastic fiber reinforced laminates have been widely used in aerospace, automobile industry, wind power generation, sports and leisure equipment and other fields because of their light weight, high specific modulus, high specific strength, corrosion resistance and other excellent properties. [0003] The traditional forming process of CFRTP needs to heat the CFRTP above the melting end temperature of the high molecular polymer. At this temperature, the CFRTP is in a completely melted state, so it has better fluidity. In this case, when CFRTP is formed, the forming pressure will force the reinforcing fibers to change the arrangement direction under the flow of resin, which seriously weakens the reinforcing effect of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C51/10B29C51/18B29C51/26B29C51/46B29C51/42B29C71/02
CPCB29C51/10B29C51/18B29C51/26B29C51/421B29C51/46B29C71/02B29C2071/025
Inventor 王健张广武朱伟付昌云郑学丰李佳腾
Owner 蚌埠景图智能科技有限公司
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