Fiber placement press roller capable of adsorbing and air-separating carbon fiber pre-impregnated tows, and method

Abstract

The invention relates to a fiber placement press roller capable of adsorbing and air-separating carbon fiber pre-impregnated tows, and a method. Through holes are formed in a press roller rigid body and a press roller elastomer; an air circuit is formed in a press roller shaft and is connected with the through holes through a corresponding space so as to form a gas channel; an electromagnetic valve controls a gas fed into the gas channel, so that a gas pressure fed into the gas channel is controlled to be a positive pressure or a negative pressure; and the electromagnetic valve controls the switchover between the negative pressure and the positive pressure, so that the press roller can realize adsorption and air-separation on pre-impregnated tows under corresponding function requirements.According to the fiber placement press roller capable of adsorbing and air-separating the carbon fiber pre-impregnated tows, and the method provided by the invention, not only can the pre-impregnatedtows be effectively restrained during a re-conveying process, but also the pre-impregnated tows can be effectively prevented from winding on the placement press roller during a placement process, andthe placement quality of fibers is improved.

Description

technical field [0001] The invention relates to an automatic fiber laying equipment, in particular to a fiber laying pressure roller capable of absorbing and blowing away carbon fiber prepreg tow and a method thereof, which are used for producing components made of composite materials. Background technique [0002] Resin-based fiber-reinforced composite materials have the advantages of low density, high specific strength, high specific modulus, high fatigue resistance and corrosion resistance, and integration of structure and function, design and manufacturing integration, etc. It has very broad application prospects in aerospace, wind power blades, automobiles and other fields. Fiber placement is an automated, high-quality manufacturing technique for resin-based fiber-reinforced composites. It is a general term for automatic tow laying technology and automatic narrow tape laying and forming technology. It is a fully automated manufacturing technology developed on the basis...

AI Technical Summary

Problems solved by technology

It can solve the problem that the heated prepreg tow sticks to the pressure roller during the laying process to a certain extent, but as the laying time increases, some resin particles will inevitably adhere to the surface of the pressure roller, making the The probability of prepreg tow sticking to the pressure roller increases, especially when laying the first layer, because the release cloth is attached to the surface of the mold, resulting in insufficient adhesion between the prepreg tow and the mold, further increasing the Increased likelihood of prepreg tow sticking to press rolls

The most important thing is that this will lead to a free section of about 20mm in the prepreg tow during refeeding. The posture of this section of prepreg tow is uncontrollable, which seriously affects the quality of the layup

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