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Preparation method of performing body with extendable cross section dimension

A cross-sectional size and preforming technology, which is applied in the direction of braids, textiles and papermaking, can solve problems such as equipment capacity limitations, achieve yarn integrity, and improve research and application levels.

Active Publication Date: 2012-06-20
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem that the size of the vertical centerline direction is limited by the capacity of the equipment in the existing three-dimensional braided preform preparation method. Method for preparing preforms with expandable cross-sectional dimensions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method of performing body with extendable cross section dimension
  • Preparation method of performing body with extendable cross section dimension
  • Preparation method of performing body with extendable cross section dimension

Examples

Experimental program
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Effect test

Embodiment 1

[0066] Two-ply T300 carbon fiber 3K was used to prepare a three-dimensional, four-directional, non-closed cubic preform with a hollow bottom of the core mold by the method of section size expansion. Dimensions of preform: 217×72×155mm 3 (a×b×c), wall thickness δ is 5mm, fiber volume content V f 50%, the size of the lined mandrel: 106×62×150mm 3 . Its weaving method is as follows:

[0067] (1) Design of weaving process parameters: Design the weaving process parameters according to the external dimensions of the preform and the fiber volume content, which is a technology well known to those skilled in the art, and the total number of columns of the mother yarn determined by the design is 324 columns (corresponding to Figure 2-3 middle a A It is 102 columns, b is 60 columns), the number of rows is 9, the female node length is 42.8mm / 10 flower nodes (average), and the circumferential flower node length is 20.7mm / 10 flower nodes (average). This embodiment is for a three-dimen...

Embodiment 2

[0075] A three-dimensional five-direction, solid cubic preform is prepared by using the epoxy-type quartz yarn 190Tex two-ply ply, using the preform preparation method with expandable cross-sectional size, see Figure 2-4 shown. Preform size: 600mm×15mm×300mm (a×b×c), fiber volume content V f is 50%. Its preparation method is as follows:

[0076] (1) Example 1 is for a three-dimensional four-way structure preform, and its parent yarns are all fixed on the moving yarn carrier, and the "throwing-implanting" fiber bundle operation is only performed on the moving yarn carrier; For preforms with five-direction and above structures, in addition to the “throwing-implanting” fiber bundle operation performed by the moving yarn carrier according to step 2) of Example 1, an additional “throwing-out-implanting” fiber bundle operation on the axially immobile yarn carrier is required. -Implanting the fiber bundle operation, which constitutes a complete process cycle of "throwing-implanti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to a preparation method of a performing body with extendable cross section dimension. According to the method, a three-dimensional multidirectional structure is adopted, and the performing body with the extendable cross section dimension is prepared through fiber beam throwing-out and planting, so the problem that the dimension of the vertical center line is limited by the equipment volume in the existing three-dimensional weaving performing body preparation method is solved. The preparation method has the advantages that on the premise of not increasing the weaving equipment volume, the dimension of the direction vertical to the weaving axis is approximately and exponentially widened, the application of a three-dimensional weaving structure to a large-dimension component becomes possible, yarns in the prepared integrally connected performing body are complete and continuous, the mechanical property of the yarns is favorably and fully exerted, and the yarns can be applied to structural compound materials with higher mechanical property requirements. The reparation method can be used for preparing the performing body with the extendable cross section dimension, and the application of the three-dimensional weaving performing body onto the larger-area structure component is widened.

Description

technical field [0001] The invention relates to a preparation method of a preform with expandable cross-sectional size, belonging to the technical field of reinforcing fibers and weaving. Background technique [0002] Most of the three-dimensional weaving equipment adopts the structural design of the determinant movement of the yarn carrier, and the forming fibers are provided by the yarn carrier. The capacity of 3D knitting equipment, that is, the number of yarn carriers, is limited by the size of the yarn carriers, and can only be limited to a certain range, which limits the size of 3D knitting products and hinders the application. [0003] Although woven 2.5D can produce products with relatively large size (especially in the width direction), its structure is only connected by two adjacent layers, and the mechanical properties between layers are not as good as three-dimensional weaving. Therefore, it is widely used in the field of structural composite materials. big limi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04C1/06
Inventor 朱建勋蒋云吴超
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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