A kind of impregnation method of continuous fiber

Abstract

The invention discloses a method for impregnating continuous fibers, which comprises the following steps: (1) drawing fiber bundles into an impregnation chamber, and making the fiber bundles pass around passive impregnation rollers I and II of the impregnation roller group in the impregnation chamber in sequence (2) Under the action of the traction force, the fiber bundle drives the passive impregnation roller Ⅰ to rotate, and the passive impregnation roller Ⅰ drives the passive impregnation roller Ⅱ to rotate synchronously. The impregnating roller automatically adjusts the speed according to the viscosity of the resin matrix, interacts with the fiber bundles and promotes the shearing motion of the resin matrix, and then impregnates the fiber bundles. After the impregnation is completed, the fiber bundles are pulled out of the impregnation chamber. The invention can self-regulate the rotating speed of the impregnating roller according to the viscosity of the resin matrix to meet the shearing effect on the resin matrix, thereby achieving the purpose of improving the impregnation effect.

Description

technical field [0001] The invention relates to the technical field of thermoplastic composite materials, in particular to a continuous fiber impregnation method. Background technique [0002] Thermoplastic resin-based composites are fiber-reinforced materials based on thermoplastic resins, mainly including long-fiber-reinforced pellets, continuous-fiber-reinforced prepreg tapes, and short-fiber-reinforced thermoplastic resins. Compared with ordinary short fiber reinforced thermoplastic resins, it has more outstanding mechanical properties, heat resistance, warpage resistance, dimensional stability, etc., so it can manufacture products with excellent mechanical properties, such as auto parts, electronic devices , chemical components, etc. [0003] The difference in quality of thermoplastic composite products, one of the more important links is fiber impregnation, fiber impregnation effect and fiber bundle thickness and monofilament dispersion uniformity, resin melt viscosit...

AI Technical Summary

Problems solved by technology

However, in the actual impregnation process, there are still the following defects: 1. The impregnation roller is driven by a motor, but when changing materials, it is necessary to explore the matching between the motor speed and different resin matrices. Time-consuming and labor-intensive, resulting in low impregnation efficiency

2. During the impregnation process, the shearing effect on the resin matrix will not change according to the state of the fiber bundle, resulting in a single impregnation effect, which is not conducive to the impregnation of the resin matrix on the fiber bundle

3. Online automatic regulation cannot be realized when abnormal fluctuations occur, requiring the intervention of human factors. This process not only wastes materials, but also increases labor costs and reduces production efficiency

4. Due to the matching problems of the state of the fiber bundle surface, traction speed, viscosity of the resin matrix and the surface state of the impregnation roll, the impregnation roll cannot satisfy the dynamic translation, so yarn breakage is prone to occur, which is not conducive to the continuous production of products

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