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Continuous pultrusion and hot pressing device of cap-shaped stringer of thickness-variable composite material and molding method

A composite material and hot pressing device technology, applied in the field of composite material processing, can solve the problems of inconsistent thickness of profiles, inability to meet application requirements, inability to apply uniform pressure on hat-shaped long trusses of variable thickness, etc., and achieve the effect of a wide range of applications

Inactive Publication Date: 2018-12-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this rigid mold is that it cannot apply uniform pressure on the hat-shaped stringer with variable thickness, which will lead to inconsistent thickness of different parts of the profile, which cannot meet the actual application requirements

Method used

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  • Continuous pultrusion and hot pressing device of cap-shaped stringer of thickness-variable composite material and molding method
  • Continuous pultrusion and hot pressing device of cap-shaped stringer of thickness-variable composite material and molding method
  • Continuous pultrusion and hot pressing device of cap-shaped stringer of thickness-variable composite material and molding method

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0040] Such as figure 1 In the continuous pultrusion forming process shown in the figure, the prepreg is stacked by the unwinding module 5, and then sequentially passes through the preforming module 6, the hot pressing module 7, the traction module 8 and the cutting module 9, and is processed into a finished product of a set length;

[0041] The unwinding module 5 includes: several prepreg reels 2, backing paper rewinding reels 1, rollers 3 and release material reels 4; the laid-up prepregs are unrolled from the prepreg reels 2, and the backing paper is isolated Rewinding by the winding shaft 1, multiple sets of prepreg layers are pasted by multiple rollers 3, and the release material 4 is laid on the upper and lower surfaces of the final prepreg layer group;

[0042] After paving, the final prepreg layer group enters the preforming module 6, and is graduall...

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Abstract

The invention discloses a continuous pultrusion and hot pressing device of a cap-shaped stringer of a thickness-variable composite material and a molding method and belongs to the technical field of processing of composite materials. A flexible hot pressing module in the device is mainly composed of a convex die, a concave die and a pressurizing device; a silicon rubber film is arranged on an inner surface of the concave die and a concave air chamber is formed between the concave die and the silicon rubber film; the air chamber is communicated with the outer side through an air feeding / exhausting channel; a channel outlet is provided with an air feeding / exhausting solenoid valve. The continuous pultrusion and hot pressing device is used for inflating or exhausting the concave air chamber and uniformly pressurizing the surface of the cap-shaped stringer, and can be adaptive thickness changes caused by am intercalation design in a cap-shaped sectional material; furthermore, a stepping distance of a stringer part at spacing interval is controlled through the device and method, disclosed by the invention, and the part meets time requirements needed by complete curing, so that continuous pultrusion and hot pressing molding is realized and relatively long sectional materials are prepared; the relatively long sectional materials are cut so that a suitable length can be obtained, different utilization requirements are met and an applicable range is wide.

Description

technical field [0001] The invention relates to the technical field of composite material processing, in particular to a hat-shaped girder continuous pultrusion hot-pressing device and a forming method of variable-thickness composite material. Background technique [0002] In the field of aviation industry, composite materials are often used as substitutes for metal materials due to their light weight and high strength, and are widely used in the rib panel structure of aircraft fuselage, wings, empennage and other parts. The cross-section of the rib panel structure in the part is generally a hat shape or other forms with variable thickness. [0003] In order to meet the needs of aircraft structure design, intercalation is generally designed in hat-shaped profiles to improve local stiffness and strength and reduce structural weight. The cross-sectional thickness of the hat-shaped girder is inconsistent along the length direction due to the requirement of intercalation design...

Claims

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Application Information

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IPC IPC(8): B29C70/52B29C70/54
CPCB29C70/525
Inventor 王跃全齐俊伟王宇姜碧羽
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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