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Preparation device of fiber reinforced composite material honeycomb core material

A composite material and fiber-reinforced technology, which is applied in the field of preparation devices for fiber-reinforced composite honeycomb core materials, can solve the problems of poor interfacial properties of honeycomb core materials, difficult operation, lack of transverse curing pressure, etc., and achieve excellent interface properties.

Active Publication Date: 2022-04-05
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires rolling and folding in a low-temperature environment, which is difficult to operate, and extrusion friction occurs between the mandrel and the fiber prepreg when assembling the mandrel, which easily causes deformation and wrinkles of the fiber prepreg
In addition, due to the lack of lateral curing pressure, the interface properties of the prepared honeycomb core material are poor

Method used

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  • Preparation device of fiber reinforced composite material honeycomb core material
  • Preparation device of fiber reinforced composite material honeycomb core material
  • Preparation device of fiber reinforced composite material honeycomb core material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Such as figure 1 and Figure 11 As shown, using the whole set of preparation equipment, according to the above-mentioned process flow of assembly-curing-demolding-post-processing-pasting panels, the preparation of semi-recessed hexagonal honeycomb sandwich structures of fiber reinforced composite materials in three different directions can be completed.

Embodiment 2

[0087] Such as Figure 12 shown in Figure 9 (j) In the ninth step, the square positioning molds 7 on both sides are disassembled, and then a single-layer or multi-layer fiber prepreg rectangular strip 14 is laid on one side of the thin panel 9, and the sizing mold and positioning mold assembled in the middle are assembled. The mold is in direct contact with the fiber prepreg rectangular strip 14, and then an in-plane pressure in the X direction is applied to the overall positioning mold and shaping mold to compress the semi-concave hexagonal honeycomb structure preform 1 covered by the fiber prepreg And keep some pressure. When the distance between the two thin side plates reaches the structural design requirements, the pressurization is stopped. After curing and demoulding, an X-direction fiber-reinforced composite honeycomb sandwich structure 18 integrally formed by co-curing of the face plate and the core material can be obtained. Compared with the fiber-reinforced comp...

Embodiment 3

[0090] Through the improvement of the positioning base plate 2, in-plane pressurization devices are added on both sides of the Y direction to complete the in-plane X-direction and Y-direction bidirectional pressurization, and the preparation of the multi-layer fiber reinforced composite honeycomb sandwich structure can be completed.

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Abstract

The invention discloses a preparation device of a fiber reinforced composite material honeycomb core material. The preparation device comprises a positioning bottom plate, a positioning mold, a shaping mold and an in-plane pressurizing device, connecting holes and positioning holes are formed in two sides of the positioning bottom plate, and corresponding positioning grooves are formed in the middle of the positioning bottom plate according to a designed honeycomb structure; the positioning die comprises a hexagonal positioning die, a square positioning die, a first half-concave-angle hexagonal positioning die and a second half-concave-angle hexagonal positioning die; the shaping mold comprises a trapezoidal shaping mold, a quadrilateral shaping mold and a semi-concave-angle hexagonal shaping mold; the in-plane pressurizing device comprises a thin side plate, a thick side plate and a bolt. According to the preparation device adopted by the invention, the preparation of various types of single-layer or multi-layer fiber reinforced composite material honeycomb core materials is realized, the preparation precision and the interface performance of a honeycomb structure are ensured, and the problems of insufficient curing pressure, poor interface performance and poor interface performance in a composite material honeycomb preparation technology at the present stage are solved. The fiber volume content is low, and the fiber is easy to deform and fold.

Description

technical field [0001] The invention belongs to the field of composite material preparation and molding, in particular to a preparation device for fiber-reinforced composite honeycomb core material. Background technique [0002] As a traditional lightweight structure, the honeycomb sandwich structure has excellent mechanical properties mainly derived from the structure rather than the properties of the matrix material. Therefore, the honeycomb structure can obtain high specific strength and high specific stiffness only through thin walls. At the same time, the direction change of the honeycomb structure can keep the inside of the sandwich structure open, and it is easy to realize the multifunctional characteristics integrating load bearing and thermal control, stealth, energy absorption, protection, actuation, energy storage, and damping, and it is easy to realize pre-embedding, functions such as heat transfer. Due to good mechanical properties and excellent designability, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54
Inventor 秦庆华王志鹏王铁军童建飞焦金泽李剑峰
Owner XI AN JIAOTONG UNIV