CN206287539U

CN206287539U - A kind of RTM products

Info

Publication number: CN206287539U
Application number: CN201621096944.4U
Authority: CN
Inventors: 鲁程; 程久益; 谢文奇; 冷巍
Original assignee: XIANNING HAIWEI COMPOSITE PRODUCTS CO Ltd
Current assignee: XIANNING HAIWEI COMPOSITE PRODUCTS CO Ltd
Priority date: 2016-09-30
Filing date: 2016-09-30
Publication date: 2017-06-30
Anticipated expiration: 2026-09-30

Abstract

The utility model provides a kind of RTM products, including fiber cloth laying, it is characterised in that include three-dimensional sandwich braided fabric in the fiber cloth laying；It is fine and close orthogonal fiber layer of cloth, vertical fluffy fiber layer and fine and close orthogonal fiber layer of cloth that three-dimensional sandwich braided fabric is arranged in order；Three-dimensional sandwich braided fabric is placed in the centre of the fiber cloth laying.The beneficial effects of the utility model are the uses of 3D cloth in RTM moulding process, both can avoid occurring local excessively thin or blocked up situation during profiled piece Lay up design, the success rate of profiled piece product can be improved again, reduce the influence to product caused by Lay up design is unreasonable so that the quality of the sheet material prepared using RTM moulding process can reach optimum level.

Description

A kind of RTM products

Technical field

The utility model art is related to application of the three-dimensional sandwich fabric in RTM techniques.

Background technology

Advanced resin reinforced fiber composite has excellent performance, has a extensive future, and is widely used in aviation, boat My god, the field such as ship, automobile, high ferro, and in all kinds of moulding process of such material, there are RTM moulding process moulded products to repair Advantage of measuring that small, dimensional accuracy is high, product quality is stable, production efficiency is high etc., in special-shaped bulk article, headed by hank type work Skill.

RTM moulding process is first to be placed in mould and form certain shape enhancing fabric, is closed again mould, and by resin Injection enters mould, dipping fiber and a kind of process for producing composite material for solidifying, and is one of main moulding process of FRP.Its It is closed mould operations system that maximum feature is, product post-processing amount is small, and production efficiency is high, and dimensional accuracy is high.But, it is non-etc. being molded During the equally distributed profiled piece of thickness, each position fiber number of plies is directly related with product thickness, and for profiled piece, products thickness Heterogeneous state, progressively transition state in curved surface, fiber lay down is laid meter and is difficult control accuracy, is easily caused local fiber and was plated in It is many, tension is extruded between scrim cloth, cause resin to be difficult to permeate, that is, formed and do area, or local fiber amount is very few, fiber sink, The rich product of superficial layer pure resin, that is, form Fu Jiao areas, and pure resin intensity difference, easy fragmentation, influence product overall performance.

The content of the invention

This patent solves its technical problem：According to the requirement of RTM moulding process, new Lay up design goes out thick buffer, Avoid because local fiber cloth laying it is blocked up or excessively thin when, dry Huo Fujiao areas of area are formed, so as to influence product quality.

There is provided a kind of new technology for solving the above problems simultaneously.

The technical solution of the utility model is：

A kind of RTM products, including fiber cloth laying, it is characterised in that include three-dimensional sandwich in the fiber cloth laying Braided fabric.

Further, it is fine and close orthogonal fiber layer of cloth, vertical fluffy fiber that above-mentioned three-dimensional sandwich braided fabric is arranged in order Layer and fine and close orthogonal fiber layer of cloth.

Further, above-mentioned three-dimensional sandwich braided fabric is placed in the centre of the fiber cloth laying.

Further, the thickness of above-mentioned three-dimensional sandwich braided fabric is 0.5~2mm.

Further, thickness is 2mm under above-mentioned three-dimensional sandwich braided fabric soft fluffy state, and thickness is 0.5 under compressive state ~2.0mm, molding thickness is 0.5~2mm.

The beneficial effect of this patent is that the use of three-dimensional sandwich braided fabric in RTM moulding process can both avoid abnormal shape Occur local excessively thin or blocked up situation during part Lay up design, the success rate of profiled piece product can be improved again, reduce because of laying The unreasonable influence to product for causing of design so that the quality of the sheet material prepared using RTM moulding process can reach most preferably Level.

Brief description of the drawings

Fig. 1 is the profiled piece routine laying scheme schematic diagram of prior art；

Fig. 2 is profiled piece routine laying scheme schematic diagram of the present utility model；

Fig. 3 is the structural representation of three-dimensional sandwich braided fabric of the present utility model；

Marked in figure：1- moulds；2- fiber cloths；3- three-dimensional sandwich braided fabrics；

301- densification orthogonal fiber layer of cloths；The vertical fluffy fiber layers of 302-.

Specific embodiment

The utility model is described in further detail below in conjunction with the accompanying drawings.

It is as shown in Figure 1 the profiled piece routine laying scheme of prior art, mould 1 has been cleared up by RTM technological requirements, according to Lay up design requirement, has been plated in fiber cloth 2 on mould, and when the profiled piece of distribution in uneven thickness is molded, each layer of cloth can not Product size everywhere can be perfectly adapted to；

When the laying of local fiber cloth 2 is blocked up, resin wellability is poor, dry spot, Gan Qu just occurs；

When local fiber cloth laying is excessively thin, resin content is too high, Fu Jiao areas occurs；

Regardless of whether Shi Gan areas or Fu Jiao areas, resin is unbalance with the proportioning of fiber, can all have a strong impact on final RTM products Quality, makes its degradation.

Referring to Fig. 2, the utility model is based on the various deficiencies of prior art in Fig. 1, in RTM molding process In, quote 3D cloth（That is three-dimensional sandwich braided fabric）.

Three-dimensional sandwich braided fabric 3 is by two-layer densification orthogonal fiber layer of cloth 301 and one layer of 302 structure of vertical fluffy fiber layer Into wherein vertical fluffy fiber layer 302 is placed in centre.

Referring to Fig. 3, using three-dimensional sandwich braided fabric 3 itself can compression to a certain extent characteristic, non-etc. During the profiled piece laying of thickness, can be used as the buffer area of fiber cloth, it is to avoid because fiber cloth part laying is blocked up or excessively thin, occur Dry area or Fu Jiao areas.

Specifically, below with commonly use thickness in monolayer be a fiber cloths 2 of 0.25mm, the most thick place of profiled piece is 12mm Laying as a example by as explanation：

By prior art laying, it is 48 layers that 12mm should spread fiber cloth 2 in theory.But for profiled piece, products thickness is non- Even state, progressively transition state in curved surface, it is actual it is difficult to control, fiber cloth part laying is unavoidable that transition state fiber lay down lays meter It is blocked up or excessively thin, so easily there is dry area or Fu Jiao areas.

And the utility model this according to corresponding Lay up design, two-berth fiber cloth 2 is respectively 21 layers, 22 layers（Totally 43 layers, 10.75mm is thick）, using three-dimensional sandwich braided fabric 3, thickness is 1.5mm for centre.

Thickness is 2mm under the free soft fluffy state of three-dimensional sandwich braided fabric 3, but because itself can be pressed to a certain extent Compression deformation, lowest compression thickness is 0.5mm, and its molding thickness can essentially be 0.5~2mm；

Mean that, when 3D cloth reaches minimum molding thickness 0.5mm, fiber cloth 2 can also repave deposited 3 layers, and work as 3D cloth and reach During to highest molding thickness 2mm, fiber cloth 2 can also be plated in 3 layers less, i.e., in fact, fiber cloth 2 is plated in the number of plies at 40~46 layers It is qualified when interval, 43 layers on the basis of conventional Lay up design, spread more 1~3 layer or spread less 1~3 layer of fiber cloth be it is qualified, Certain cushion space is given, even if having local fiber laying excessive or very few when laying is designed, as long as also in 3D cloth In molding thickness buffer area, so that it may be prevented effectively from the appearance in dry area or Fu Jiao areas, the success of profiled piece product is greatly improved Rate.

Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.

Claims

1. a kind of RTM products, including fiber cloth laying, it is characterised in that include three-dimensional sandwich volume in the fiber cloth laying Woven fabric；The three-dimensional sandwich braided fabric is fine and close orthogonal fiber layer of cloth, vertical fluffy fiber layer and the densification being arranged in order Orthogonal fiber layer of cloth.

2. RTM products as claimed in claim 1, it is characterised in that the three-dimensional sandwich braided fabric is placed in the fiber cloth The centre of laying.

3. RTM products as claimed in claim 1 or 2, it is characterised in that thick under the three-dimensional sandwich braided fabric soft fluffy state It is 2mm to spend, and in 0.5~2.0mm, molding thickness is 0.5~2mm to thickness under compressive state.