CN203305581U - Pultruded wood core composite sandwich plate - Google Patents

Abstract

The utility model discloses a pultrusion-formed wooden core material composite material interlayer board produced by a novel process that is easy to popularize, simple and practical to operate, and has a high material utilization rate. The wooden core material and the composite material ribs are arranged in the composite material shell; the wooden core material is a segmented continuous type wooden core material, and the continuation of the wooden core material adopts a mortise and tenon structure, and the mortise and tenon structure refers to The wood ends on both sides of the connection adopt a concave-convex structure that cooperates with each other, including convex joints and concave joints. The utility model also discloses a production process of a wood core material composite sandwich board formed by pultrusion.

Description

A pultruded wooden core composite sandwich panel

technical field

The utility model relates to a composite material sandwich panel, in particular to a composite material sandwich panel with a composite material shell, a wooden core material and a composite material rib plate manufactured by a pultrusion process, specifically a composite material sandwich panel using a The continuation of the continuous production of composite sandwich panels.

Background technique

As a new structural form, composite sandwich structure has been widely used in construction, transportation, ships, aerospace, etc. due to its advantages of light weight, high specific strength, easy processing and modification, corrosion resistance, and strong designability. field. Wood is widely used as core material in sandwich structures because of its light weight and toughness, low thermal conductivity, and convenient material acquisition.

In the production process of sandwich panels, the pultrusion process is a process with high production efficiency and stable product quality. The continuation of the core material has always been a concern of people, and the same is true for the continuation of the wooden core material. In practical engineering applications, the extruded products are often cut at the discontinuity, which limits the size of the sandwich panel; or by implanting additional "I", channel angle steel or other rigid components at the connection, in practice The positioning of the rigid member when it enters the mold becomes difficult during splicing; at the same time, it is difficult to ensure the connection between the connector and the core material on both sides and the interface with the surface layer during co-curing.

Therefore, through the pultrusion process, the new type of core material connected by the mortise and tenon structure of the wooden core material itself and the auxiliary connector can make full use of the wooden core material itself by controlling the size of the core material on both sides in the connection area. It is a composite material sandwich panel produced by a new process that is easy to popularize, easy to operate, and has high material utilization rate.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, to provide a compound composite material that is easy to popularize, easy to operate, can effectively utilize the strength of the core material itself, and has low cost. Material sandwich panels.

The technical scheme adopted in the utility model is: a pultruded wooden core material composite material sandwich panel, including a composite material shell, a wooden core material and a composite material rib, and the wooden core material and composite material rib are arranged on a composite inside the material enclosure;

The wooden core material is a segmented splicing type wooden core material, and the splicing part of the wooden core material adopts a mortise and tenon structure. Includes male and female connectors.

Preferably, the connection of the wooden core material is further provided with an auxiliary connecting piece, and the auxiliary connecting piece is arranged in the opening of the connection of the wooden core material.

Preferably, glue is provided at the continuation of the wood core material.

Preferably, the fibers used in the composite shell and composite ribs are at least one of carbon fibers, glass fibers, basalt fibers, aramid fibers, and hybrid fibers; the fibers are unidirectional fiber bundles or bidirectional fiber cloth or multidirectional One of the fiber cloths; the resin used is at least one of unsaturated polyester, phthalic resin, vinyl resin, epoxy resin, inorganic resin or thermoplastic resin material.

Preferably, the wood core material is one of Balsa wood, paulownia wood, Chinese fir, poplar, beech, willow and wood-based panels.

Preferably, the mortise and tenon structure includes one of a right-angle stepped type, an oblique-angled stepped type, a combined type and a buckle-groove type, wherein the combined type is a combination of a right-angled stepped type and an oblique angle.

Preferably, in the mortise and tenon structure, the right-angle step type is one step, two steps or a plurality of steps, and the oblique step type is one slope foot, two slope feet or one of a plurality of slope feet, There are two types of buckle grooves: right angle buckle groove and oblique angle buckle groove.

Preferably, the connecting glue at the continuation of the wood core material is one of jigsaw glue, white latex, and yellow glue.

Preferably, the auxiliary connector is one of a prefabricated metal piece, a short column of composite material, a PE rod, a PP rod and a fiber bundle.

A production process for the above-mentioned pultruded wooden core material composite sandwich panel, which uses fiber, resin and wooden core material as raw materials to continuously integrally form a composite material shell, wooden core material and composite material ribs through the pultrusion process plate, including the following steps:

1) For the wooden core material, the mortise and tenon structure is processed at the joint of the core material. The mortise and tenon structure is composed of a convex joint and a concave joint. At the same time, the upper surface and side of the core material need to be roughened to strengthen its connection with the surface layer interface connection;

2) Put the fiber and the wood core material into the dipping tank filled with resin, enter the heating and curing mold through the mold positioning, pultrude through the traction equipment, and finally cut into the required size by the cutting equipment.

Beneficial effect:

1. The utility model uses the pultrusion process to produce the sandwich panel, the quality of the product is stable, and the production efficiency is high.

2. The utility model is a pultruded wooden core material composite material sandwich panel, which adopts the mortise and tenon structure of the core material for continuation, and fully utilizes the fit of the wooden core material itself to solve the problem of core material continuation. For the sandwich panel, there is no Add new structure.

3. The utility model is a pultruded wooden core material composite material sandwich panel, the auxiliary connector and the surface layer are solidified together to form a whole, and the bending bearing capacity of the joint is improved. At the same time, the auxiliary connector passes through the core material and connects with the surface layer, the interface strength of the connection is enhanced, and the interface peeling is not easy to occur at the connection.

4. The utility model is a pultruded wooden core composite material sandwich panel. When the cementing auxiliary connector is used, the cementing speed is fast, the processing will not affect the production speed of the production line, and the operation is simple and practical.

5. The mortise and tenon structure of the utility model has strong designability and wide application range.

Description of drawings

Fig. 1 is the utility model pultrusion wooden sandwich composite board pultrusion production process and adopts the schematic diagram of auxiliary connector;

Fig. 2 is the schematic diagram of connecting glue used in the pultrusion production process of the pultruded wood sandwich composite material board of the utility model;

3-10 are schematic cross-sectional views of the mortise and tenon structure of the core material of the present invention.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 and 2: a pultrusion-molded wooden core material composite material sandwich panel is composed of a composite material shell 1, a wooden core material 2 and a composite material rib 3. The specific production line of the pultrusion process is: the fiber 4 and the wooden core material 2 enter the impregnation tank filled with the resin 5, enter the heating and curing mold 6 through the mold positioning, pultrude through the traction device 7, and finally cut through the cutting device 8 to the desired size. The wooden core material 2 needs to be treated with a mortise and tenon structure at the joint of the core material, and the mortise and tenon structure is composed of a male joint 9 and a female joint 10 . At the same time, the upper surface and sides of the core material need to be roughened to strengthen the interface connection with the surface layer. The auxiliary connecting part is one of prefabricated metal parts, composite short columns, PE rods, PP rods and fiber bundles. The shape of the short column 15 of composite material can be one of cylinder and cone. The constraint effect of the auxiliary connector mainly means that there is an opening 11 in the area of the male joint 9 and the female joint 10 , and when the male joint 9 and the female joint 10 are connected together, the hole 11 is a through hole. Through the sewing equipment 12, the fiber bundle 13 is passed through the hole 11, and the two sides of the fiber sand head are exposed, and the length of the fiber passing through the core material is about 50 mm. It should be ensured that the ends of the fiber bundles 13 are evenly spread out to ensure that the ends of the fiber bundles 13 and the fibers 4 are fully bonded when solidified; The joints can be made into alveolar shapes, and the joint glue 14 is in a solidified or semi-solidified state before entering the mould. The connecting glue is one of jigsaw glue, white latex, and yellow glue.

The wooden core material 2 is one of Balsa wood, paulownia wood, fir, poplar, beech, willow, and wood-based panels. Composite short column 15 is made of the same material as composite shell 1 and composite rib 3, and is formed by curing fibers 4 or fiber bundles 13 and resin 5 in the pultrusion heating zone. The fibers 4 are carbon fibers, glass fibers, basalt at least one of fiber, aramid fiber, and hybrid fiber; the resin 5 is at least one of unsaturated polyester, phthalic resin, vinyl resin, epoxy resin, inorganic resin or thermoplastic resin material. And the fibers 4 and the fiber bundles 13 may be one of unidirectional fiber bundles, bidirectional fiber cloths or multidirectional fiber cloths.

As shown in Figure 3-10, the mortise and tenon structure of the core material means that the wood ends on both sides of the joint adopt a concave-convex structure that cooperates with each other, including the convex joint 9 and the concave joint 10, and the cross-sectional form includes right-angle stepped, oblique One of the corner stepped type, combined type and buckle groove type. The right-angle step is one step, two steps or one of more steps. The bevel type is one of one slope foot, two slope feet or multiple slope feet. The combined type is a combination of right-angled steps and oblique steps. There are two types of buckle grooves: right angle buckle groove and oblique angle buckle groove.

Example 1

A pultruded wood core composite sandwich panel. The pultrusion production process is that the glass fiber and paulownia wood core material enter the dipping tank filled with vinyl resin, enter the heating and curing mold through the mold positioning, and pull it through the traction device. Extruded, and finally cut to the required size by cutting equipment. For the core material, the mortise and tenon structure needs to be processed at the joint of the core material. The mortise and tenon structure adopts the oblique alveolar type, which is composed of convex joints and concave joints, and white latex is used for solid wood splicing. At the same time, the upper surface and sides of the core material need to be roughened to strengthen the interface connection with the surface layer. Here, some shallow grooves are used.

Example 2

A pultruded wooden core composite sandwich panel. The pultruded production process is that the fiber and Balsa wood enter the impregnation tank filled with epoxy resin, enter the heating and curing mold through the mold positioning, and pultrude through the traction equipment. , and finally cut to the required size by cutting equipment. For the core material, the mortise and tenon structure needs to be processed at the joint of the core material. At the same time, the surface needs to be roughened to strengthen the interface connection with the surface layer. Here, some shallow grooves are used. The mortise and tenon structure adopts a combined form, consisting of a convex joint and a concave joint. A row of cylindrical holes is opened at the joint, and the auxiliary joint is a short column of composite material.

It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model. All components that are not specified in this embodiment can be realized by existing technologies.

Claims (8)

1. A pultruded wooden core material composite material sandwich panel is characterized in that: comprise a composite material shell, a wooden core material and a composite material rib, and the wood core material and a composite material rib are arranged in the composite material shell ; The wooden core material is a segmented splicing type wooden core material, and the splicing part of the wooden core material adopts a mortise and tenon structure. Includes male and female connectors. 2. A kind of pultruded wooden core material composite material sandwich panel according to claim 1, characterized in that: the continuation of the wooden core material is also provided with auxiliary connectors, and the auxiliary connectors are arranged on the wooden core In the opening of the joint of the material. 3 . A pultruded wooden core material composite material sandwich panel according to claim 1 , characterized in that: connecting glue is also provided at the continuation of the wooden core material. 4 . 4. A kind of pultruded wooden core material composite sandwich panel according to claim 1, characterized in that: said wooden core material is Balsa wood, paulownia wood, fir, poplar, beech, willow, wood-based panel One of. 5. A pultruded wooden core composite material sandwich panel according to claim 1, characterized in that: said mortise and tenon structure includes right-angle stepped type, beveled-angled stepped type, combined type and buckle-groove type One, wherein the combination is a combination of right-angled steps and oblique angles. 6. A pultruded wooden core composite material sandwich panel according to claim 5, characterized in that: the right-angle step type in the mortise and tenon structure is one step, two steps or one of a plurality of steps One type, the oblique stepped type is one of one slope foot, two slope feet or multiple slope feet, and the buckle groove type is divided into two types: right angle buckle groove and bevel buckle groove. 7. A kind of pultruded wooden core material composite material sandwich panel according to claim 3, characterized in that: the connecting glue at the continuation of the wooden core material is jigsaw glue, white latex, yellow glue A sort of. 8. A kind of pultruded wooden core material composite sandwich panel according to claim 2, characterized in that: said auxiliary connectors are prefabricated metal parts, composite short columns, PE rods, PP rods and fiber One of the bunch.

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