Preparation method of variable-cross-section endless tow
A technology of long tow and variable cross section, which is applied in textiles, papermaking, yarn, adhesives, etc. It can solve the problems of poor product consistency, many tow breaks, high labor intensity, etc., and achieve the effect of simple and efficient operation of variable diameter
Active Publication Date: 2020-12-18
SHANDONG ZHONGHENG CARBON FIBER TECH DEV CO LTD
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Problems solved by technology
In this processing method, there are many tow breakages, which directly affect the performance of the composite window, and more manual involvement, high labor intensity, low efficiency, and poor product consistency
Method used
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[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0020] The purpose of the present invention is to provide a method for preparing filament bundles with variable cross-sections, so as to solve the problems existing in the prior art, so that the yarns are not broken, the labor intensity is reduced, and the product consistency and work efficiency are improved.
[0021] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further d...
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Abstract
The invention discloses a preparation method of a variable cross-section endless tow. The method specifically comprises the following steps of 1, doubling, cutting, carding, sizing and drying monofilaments to form a continuous endless tow, and placing the endless tow between vertically arranged rubber roller groups for processing, so that the endless tow is conveyed under the traction of a traction device; and 2, in the conveying process of the endless tows, cutting the endless tows into set variable-cross-section tows through a hob, and sizing and drying the variable-cross-section tows to obtain the finished variable-cross-section endless tow. According to the preparation method of the variable-cross-section endless tow, a new raw material preparation method is provided for knitting or machine knitting, the diameter changing operation of the endless tow is simple, convenient and efficient, no broken tow exists in a fabric processing process, the exertion of fiber characteristics in acomposite material is facilitated, technical support is provided for manufacturing of composite fan blades and prefabricated bodies with continuous variable-cross-section or variable-thickness curvedsurfaces, and important significance is achieved for integral forming of the net dimensions of aerospace related components.
Description
technical field [0001] The invention relates to the technical field of composite material prefabricated body manufacturing, in particular to a method for preparing filament bundles with variable cross-sections. Background technique [0002] Variable thickness or variable section or curved surface parts have important application value in aerospace field, such as engine blades. Generally, the continuous filament bundles are of equal cross-section, and the continuous filament bundles generally consist of 500-4800 monofilaments with a diameter of 1-20 μm, and the monofilaments are bonded together by a sizing agent. In engineering, there is a method of locally adding short tows (that is, adding yarn) to achieve the purpose of making the tow thicker, so as to meet the technical requirements of variable cross-section or variable thickness components. In this processing method, there are many tow breakages, which directly affect the performance of the composite window, and more ma...
Claims
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IPC IPC(8): D02G3/34D02G3/40
CPCD02G3/34D02G3/40D10B2101/06D10B2101/12
Inventor 吕明迪关昊辰杨朝坤
Owner SHANDONG ZHONGHENG CARBON FIBER TECH DEV CO LTD