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Molding preparation method for tackified preform of fiber layered-connection structure

A preform and fiber layer technology, which is applied in the directions of woven fabrics, textiles and papermaking, can solve the problems of unsatisfactory homogeneity and mechanical properties, difficult preparation of preforms, etc., and achieves stable and controllable dimensions and structure. The effect of strong design and complete unit structure

Active Publication Date: 2016-08-17
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the defects of high thickness, large size, and complex shape preforms in the prior art, which are difficult to prepare and cannot meet the requirements of homogeneity and mechanical properties, the present invention provides a plastic preparation method for fiber layered structure preforms

Method used

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  • Molding preparation method for tackified preform of fiber layered-connection structure
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  • Molding preparation method for tackified preform of fiber layered-connection structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Tubular fiber layered preforms (such as figure 2 ) as an example, the inner diameter is 500mm, and the thickness of the preform is 28mm. Both the laminated yarn and the laminated yarn are made of quartz glass fiber, which adopts a shallow cross-bending fiber layered structure. The specification of the laminated yarn is 190Tex×4 strands, and the density is 9 strands / cm; the specification of the laminated yarn is 190Tex×7 strands, and the density 2 roots / cm.

[0051] Assuming that the outer diameter of the mandrel (model) of the tubular fiber layered structure preform is R, the thickness of the innermost unit is determined by the number of arrays of double-layered yarns, and the number of weekly units is M, which is the same as the number of arrays of double-layered yarns. The tubular fan-shaped unit (dividing the tubular fiber layered structure preform into equal-sized n equal parts, the smallest unit among them) changes in both the circumferential and radial thickness...

Embodiment 2

[0061] The preform is connected with tapered fiber layers (such as image 3 ) as an example, the inner diameter of the preform is 500mm, the cone angle (the angle between the busbar and the central axis) is 16 degrees, and the height of the cone section is 500mm. The thickness of the preform is 28mm. The designed double-layered yarn and laminated yarn are all quartz glass fibers, and adopt a shallow cross-bending fiber layered structure. The specification of the double-layered yarn is 190Tex×4 strands, and the density is 9 strands / cm; the specification of the laminated yarn is 190Tex×7 strands. Density 2 / cm.

[0062] The thickness of the innermost unit of the preform determines the number of continuous-layer yarn arrays, and the number of units per week is the same as the number of arrays of continuous-layer yarn bundles. Equally divided, the smallest unit in it) changes with the change of radius and axial size. When the fan-shaped unit is equivalent to a parallelepiped un...

Embodiment 3

[0074] It is basically the same as Example 1, except that the thickness of the preform is 12mm.

[0075] The difference between Example 3 and the Comparative Example is that Example 3 is manufactured according to the mold and integrally formed, while the Comparative Example is offline unfolding and profiling. The epoxy resin of model GT-807A was used to compound the fabrics obtained in Example 3 and Comparative Example, and the mechanical properties of the composited fabrics are shown in Table 1.

[0076] Table 1 Composite performance comparison table

[0077]

[0078] Table 2 Preform Product Accuracy Table

[0079]

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Abstract

The invention discloses a molding preparation method for a tackified preform of a fiber layered-connection structure. According to the molding preparation method for the tackified preform of the fiber layered-connection structure, the tackified perform is woven according to a mold through a knitting method. The molding preparation method for the tackified preform of the fiber layered-connection structure is applicable to preparation of the tackified perform which is high in thickness, large in size and complex in shape; the molding preparation method ahs the advantages of being great in structural design performance, good in tackified perform homogeneity, excellent in mechanical property, high in fiber volume fraction, complete in block construction, continuous in yarn bundle, stable and controllable in dimension, high in preparation precision and suitable for preparing tackified perform complex in shape.

Description

technical field [0001] The invention relates to a molding preparation method of a fiber layered structure preform, which belongs to the field of three-dimensional fabric weaving. Background technique [0002] The fiber layered structure is developed on the basis of 2D. The weaving process is the first technology to develop the fiber layered structure, which can prepare plate-shaped preforms; it can also prepare tubes, Conical preform. With the expansion of the application of fiber layered structures, in the process of preparing high-thickness, large-size, and complex-shaped preforms, it is difficult to realize the off-line weaving and profiling molding technology or to meet the high-precision profiling design requirements. With the profiling process, either there is a large internal stress caused by profiling deformation inside the product, or there are unavoidable heterogeneous defects, resulting in a decline in the performance of the composite material. For this reason, ...

Claims

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Application Information

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IPC IPC(8): D04C1/00
CPCD04C1/00
Inventor 朱建勋张立泉马文锁郭洪伟朱梦蝶唐亦囡
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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