Wire nozzle structure and method of use for wet forming prepreg

Abstract

The invention provides a spinning nozzle structure for a wet molding process of prepreg and a using method thereof. The spinning nozzle structure comprises a support module, an impregnation module, a yarn pre-spreading module and a yarn spreading module. The support module comprises a side plate and a base plate. The impregnation module, the yarn pre-spreading module and the yarn spreading module are sequentially arranged on the side plate in the horizontal direction of the side plate. According to the spinning nozzle structure, due to the design of yarn spreading rollers and pre-spreading rollers, the widths of yarn sheets can be controlled, yarn spreading of the widths of different yarn sheets is achieved under the condition of cross sectional shapes of the different yarn spreading rollers and yarn pre-spreading rollers, and the carbon fiber reinforced resin matrix composite prepreg of different thicknesses is prepared so as to meet the requirement for the thicknesses of the prepreg in the composite product design process. The spinning nozzle structure can be applied to yarn spreading phenomena of different fiber types and fiber bundle sizes, the spinning nozzle structure can adjust the widths of the yarn sheets by adjusting the cross sectional shapes of the yarn spreading rollers so as to achieve the purpose of preparing the carbon fiber prepreg of different thicknesses.

Description

technical field [0001] The invention relates to the technical field of composite material molding, in particular to a wire nozzle mechanism for wet molding prepregs and a method for using the same. Background technique [0002] Due to the high specific modulus and specific strength of composite materials, and the advantages of the integration of structural design and manufacturing, composite materials are widely used in the aerospace field. With the continuous improvement of the reliability and quality requirements of the composite material product structure in the aerospace field, and the continuous improvement of the composite material forming process technology, the requirements for the performance, reliability and stability of the composite material preform in the intermediate link of composite material forming Getting harsher. Especially in the satellite truss structure with prepreg as the intermediate molding material, hand laying, automatic laying, and prepreg windin...

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Problems solved by technology

However, at present, the wire nozzle structure of prepreg preparation equipment by wet method is single, and it is difficult to prepare thin prepregs, which seriously affects the design of composite material layup structures, and it is difficult to meet the needs of composite products with complex structures on satellites for prepregs of different thicknesses. In the prepreg preparation process, the large-tow carbon fiber preparation process has a serious yarn spreading problem, and white spots appear in the middle of the prepreg, which reduces the utilization rate of the prepreg

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