Composite material pulling and extruding molding method by heating baking-path to solidify

A composite material and pultrusion molding technology, which is applied in the field of composite material molding, can solve the problems of difficult pultrusion production, dead mold, and large frictional resistance in the curing area of ​​the pultrusion mold.

Inactive Publication Date: 2009-08-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a composite material pultrusion molding method that uses drying tunnels to assist post-curing to solve the problem of excessive friction resistance in the curing zone of the pultrusion die, which can easily cause dead mold, especially to solve the problem of products with large specific surface areas. Difficulty in achieving pultrusion production

Method used

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  • Composite material pulling and extruding molding method by heating baking-path to solidify
  • Composite material pulling and extruding molding method by heating baking-path to solidify
  • Composite material pulling and extruding molding method by heating baking-path to solidify

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Embodiment Construction

[0020] Using FW-77 high temperature curing system epoxy resin and T300 carbon fiber to pultrude a composite material round rod with a diameter of 0.3mm.

[0021] 1. Determination of the temperature of the dipping tank

[0022] According to the viscosity-temperature test, it is determined that the dipping tank can maintain the viscosity of the resin at 0.5 Pa.s to 2 Pa.s for 3 hours within the range of 35 °C ± 2 °C, and the temperature of the dipping tank is set at 35 °C.

[0023] 2. Determination of mold temperature

[0024] After testing, the mold temperature was selected to be 140°C, which would not cause a large pultrusion resistance in the mold but also allow the resin to quickly gel in a short period of time and increase the pultrusion rate.

[0025] 3. Determination of pultrusion rate

[0026] At a mold temperature of 140°C, a pultrusion rate of 0.75m / min is selected to control the resin to reach a gel state after exiting the mold.

[0027] 4. Determination of drying ...

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Abstract

The invention discloses a pultrusion molding method for a drying tunnel-assisted post-cured composite material, which belongs to the technical field of composite material molding. The method is characterized by comprising the following steps that: (1) reinforced fibers are released through a yarn releasing device and enter a steeping vat through a guide device; (2) fibers impregnated with resin are cured in a hot mold into a gel state; (3) the gel-like composite material product out of the mold is cured in a heating drying tunnel; and (4) the cured composite material is coiled by a coiling device under the traction of a traction unit. The method solves the problem of the prior method that the friction in the curing area of a pultrusion mold is overlarge to cause dead mold, and is particularly applicable to pultruded products with a large specific surface area.

Description

technical field [0001] The invention relates to a composite material pultrusion molding method using a drying tunnel to assist post-curing, and belongs to the technical field of composite material molding. Background technique [0002] The pultrusion process is the molding process with the highest degree of automation and the highest production efficiency in the composite material forming method, and is suitable for the production of continuous composite material products with a fixed cross-sectional shape. For example, "Development of Rapid Pultrusion Process for Reinforced Core of FRP Optical Cable" (Shen Huiping, Pei Hong, Gao Xudong, etc. Glass Fiber, 2004, (1): 18-19.)... introduced a typical composite material pultrusion process : The fiber yarn is put into the impregnation tank to impregnate the resin, and after preforming, it enters the heated mold for curing, and the cured composite material product is pulled out of the mold by the traction device for continuous win...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/52B29C70/54
Inventor 李勇肖军谭永刚程培忠孙涛
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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