Device for spreading large-tow carbon fibers through combination of sound wave method and mechanical multi-roller method

Abstract

The invention provides a device for spreading large-tow carbon fibers through combination of a sound wave method and a mechanical multi-roller method. The device for spreading the large-tow carbon fibers comprises a yarn containing device used for containing a fiber tow. The device for spreading the large-tow carbon fibers is characterized in that after being guided out of the yarn containing device, the fiber tow enters a tension control device, the surface tension of the fiber tow is controlled by the tension control device, the tension is kept constant, the fiber tow with the adjusted tension passes through the space between a pressure feeding roller and a second supporting roller and then is guided into a yarn pre-spreading device, the fiber tow is pre-spread by the yarn pre-spreading device according to the sound wave method, the pre-spread fiber tow is guided into the main yarn spreading device, the fiber tow is spread through the mechanical multi-roller fiber expanding method by the main yarn spreading device, and the spread fiber tow is rolled through a traction take-up device. The device for spreading the large-tow carbon fibers can effectively and fully spread the large-tow carbon fibers.

Description

technical field [0001] The invention relates to a large tow carbon fiber unfolding device combining the sonic method and the mechanical multi-roller method. Background technique [0002] Since the price of large tow carbon fiber, such as 48K, 60K, 360K, 480K, etc., is much cheaper than that of small tow, the price of large tow is only 50%-60% of that of small tow, so that the cost of advanced composite materials can be reduced. significantly reduced. Both large-tow carbon fiber and small-tow carbon fiber can be made into composite materials, but the material and processing costs are very different. Because from petroleum raw materials to carbon fiber, the value-added relationship is 1 to 3, and when carbon fiber is made into composite materials, the value-added relationship is 10, which means that the cost of carbon fiber in composite materials only accounts for 25%-30%, and subsequent fiber product parts are formed and processed. The cost accounts for 70%-75%. The choice...

AI Technical Summary

Problems solved by technology

[0005] At present, the expansion device for large tow carbon fiber mainly adopts the mechanical multi-roller method, and the fiber bundle is widened and thinned by roller rolling, left and right swinging or up and down vibration. The expansion effect is controlled by the vibration amplitude, but the expansion width is limited, at most twice, If the vibration amplitude is increased, the carbon fiber will easily break, and the vibration frequency is limited

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