CN216044824U

CN216044824U - Composite material pultrusion section bar

Info

Publication number: CN216044824U
Application number: CN202122602792.8U
Authority: CN
Inventors: 彭威; 赵春阳; 辛朝波
Original assignee: Langfang Feize Composite Technology Co ltd
Current assignee: Langfang Feize Composite Technology Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-03-15
Anticipated expiration: 2031-10-28

Abstract

The utility model provides a composite material pultrusion section, the interior of the section is hollow, and the section comprises: the cross section of the first profile structure, which is vertical to the length direction, is C-shaped, and two ends of the C-shaped cross section of the first profile structure are respectively provided with a first upper joint and a first lower joint; the cross section of the second profile structure, which is vertical to the length direction, is C-shaped, and two ends of the C-shaped cross section of the second profile structure are respectively provided with a second upper joint and a second lower joint; the first upper joint is butted with the second upper joint or the second lower joint, and the first lower joint is butted with the second lower joint or the second upper joint. The process of winding is cancelled in the pultrusion process, so that the manufacturing difficulty is reduced, the production efficiency can be further improved, and the production cost is reduced.

Description

Composite material pultrusion section bar

Technical Field

The utility model belongs to the field of composite material molding, and particularly relates to a composite material pultrusion profile.

Background

Existing profiles, such as battery box beams, formed from fibers or fiber fabrics of composite materials are pulled through equipment or external forces and then pultruded. The composite material pultrusion process is a process method for producing a composite material section by impregnating continuous fibers or fiber fabrics with resin under the traction of traction equipment and heating the resin through a forming die to solidify the resin. The profile formed by the process has excellent specific strength, rigidity, weather resistance, corrosion resistance and durability, and thus is widely used.

However, existing pultruded profiles, such as cell box beam profiles, are of one-sided butt joint design, as shown in fig. 1. In the extrusion process, one part of fiber bundles is required to form the main part of the profile, the other part of fiber bundles are wound in the fiber bundles, and the winding process is not easy to realize; if a part of fiber bundles are adopted, and the other part of the fiber bundles are wrapped by fiber fabrics to cover the fiber bundles, the fiber fabrics need to be pulled on four pulling surfaces, the angles of the fiber fabrics are not well treated and are easy to deform, the design requirements cannot be met, and the product quality is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks and deficiencies of the prior art, the present invention is directed to a pultruded profile of a composite material.

In order to achieve the above purpose, the embodiment of the utility model adopts the following technical scheme:

a composite pultruded profile, said profile being hollow inside, comprising: the cross section of the first profile structure, which is vertical to the length direction, is C-shaped, and two ends of the C-shaped cross section of the first profile structure are respectively provided with a first upper joint and a first lower joint; the cross section of the second profile structure, which is vertical to the length direction, is C-shaped, and two ends of the C-shaped cross section of the second profile structure are respectively provided with a second upper joint and a second lower joint; the first upper joint is butted with the second upper joint or the second lower joint, and the first lower joint is butted with the second lower joint or the second upper joint.

According to the technical scheme provided by the embodiment of the application, the butt joint of the first upper joint and the second upper joint or the second lower joint is bonded through one of epoxy thermosetting resin, polyester thermosetting resin or phenolic thermosetting resin; the butt joint of the first lower joint and the second lower joint or the second upper joint is bonded through one of epoxy thermosetting resin, polyester thermosetting resin or phenolic thermosetting resin.

According to the technical scheme provided by the embodiment of the application, the first profile structure and the second profile structure are symmetrically arranged in a first direction; the first direction is a central connecting line at the joint of the two.

According to the technical scheme provided by the embodiment of the application, the first profile structure and the second profile structure are formed by stretching multi-angle fiber fabrics positioned on the outer side and a plurality of bundles of unidirectional fibers positioned in the middle to form a coated sandwich structure.

According to the technical scheme provided by the embodiment of the application, the pultrusion profile is formed by pultrusion of the reinforcing fibers soaked in the matrix material, and the matrix material has viscosity.

According to the technical scheme provided by the embodiment of the application, the reinforcing fiber comprises one or more of unidirectional carbon fiber, multi-angle carbon fiber fabric, unidirectional glass fiber and multi-angle glass fiber fabric.

According to the technical scheme provided by the embodiment of the application, the matrix material comprises one of epoxy thermosetting resin, polyester thermosetting resin or phenolic thermosetting resin.

According to the technical scheme provided by the embodiment of the application, the resin selected at the joint of the first profile structure and the second profile structure is the same as the resin selected by the base material

The utility model has the following beneficial effects:

the application the section bar owing to adopt the bilateral overlap joint structural design mode of two C types, make full use of pultrusion section bar axial atress characteristics can satisfy different performance products, be used in suitable place for example be used for the battery box crossbeam, it produces the property ability surplus to reduce, reduces manufacturing cost. Because the double-pair connector is adopted, the winding procedure is cancelled in the pultrusion process, the production efficiency can be further improved, and the production cost is reduced. Simultaneously, the design mode of double C-shaped lap joints is compared with the dragging face of four fiber fabrics required by the existing section bar, the dragging face of the fiber fabrics is reduced, the dragging face of each C-shaped structure is changed into three, the manufacturing difficulty is reduced, the production process is greatly reduced, corners of the fiber fabrics are not easy to deform, and meanwhile, the cross beam of the battery box is mainly composed of a plurality of cross beams and plays a role in supporting the axial direction, so that the process of the section bar can completely meet the requirements, and the production cost is reduced. And a winding process is not needed, so that winding machine equipment is reduced, and the equipment investment cost is further reduced.

Drawings

Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 is a schematic structural diagram of a conventional profile;

FIG. 2 is a schematic perspective view of a profile according to the present application;

FIG. 3 is a schematic side view of the profile of the present application in an axial direction;

FIG. 4 is a schematic view of the section A-A of the profile of FIG. 2 in the radial direction;

fig. 5 is a schematic cross-sectional structure of the profile of the present application along the axial direction.

Description of reference numerals:

100. a first profile structure; 110. a first upper joint; 120. a first lower joint;

200. a second profile structure; 210. a second upper joint; 220. a second lower joint;

300. butting joints; 400. fibers; 500. a fiber fabric.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

A composite pultruded profile, said profile being hollow inside, comprising: the cross section of the first profile structure 100 perpendicular to the length direction is C-shaped, and two ends of the C-shaped cross section of the first profile structure 100 are respectively a first upper joint 110 and a first lower joint 120; a second profile structure 200, wherein the cross section of the second profile structure 200 perpendicular to the length direction is C-shaped, and two ends of the C-shaped cross section of the second profile structure 200 are respectively a second upper joint 210 and a second lower joint 220; the first upper joint 110 is butted against the second upper joint 210 or the second lower joint 220, and the first lower joint 120 is butted against the second lower joint 220 or the second upper joint 210.

Specifically, as shown in fig. 2, the profile described in the present application is a hollow structure. The section bar is suitable for the cross beams of the battery box, and the common battery box is provided with a plurality of cross beams which jointly play a role in supporting the battery box in the axial direction. As shown in fig. 3, the side structure of the profile is schematically illustrated, the profile comprises a first profile structure 100 and a second profile structure 200, and due to the adoption of a double-C-shaped bilateral overlapping structure design mode, the axial stress characteristic of the pultruded profile is fully utilized, so that different performance products can be met, and the profile can be used in a proper place such as a battery box beam, thereby reducing the product performance surplus and reducing the manufacturing cost. Because the double-pair connector is adopted, the winding procedure is cancelled in the pultrusion process, the production efficiency can be further improved, and the production cost is reduced.

It should be particularly noted here that, although the section bar and the section bar in the prior art described in the present application are slightly reduced in strength, the design manner of double C-shaped lap joints reduces the pulling face of the fiber fabric, the pulling face of each C-shaped structure becomes three, the manufacturing difficulty is reduced, the production process is greatly reduced, the corners of the fiber fabric are not easily deformed, and meanwhile, the battery box cross beam is mainly composed of a plurality of cross beams and plays a role in axial support, so that the process of the section bar can completely meet the requirements, and the production cost is reduced. And a winding process is not needed, so that winding machine equipment is reduced, and the equipment investment cost is further reduced.

Further, the joint of the first upper joint 110 and the second upper joint 210 or the second lower joint 220 is bonded by one of epoxy thermosetting resin, polyester thermosetting resin, or phenolic thermosetting resin, and the joint of the first lower joint 120 and the second lower joint 220 or the second upper joint 210 is bonded by one of epoxy thermosetting resin, polyester thermosetting resin, or phenolic thermosetting resin.

Specifically, as shown in fig. 4, the resin composite material is reinforced at the butt joint, so that the firmness of bonding at the butt joint is ensured, and the firmness of the profile product is further ensured.

Further, the first profile structure 100 and the second profile structure 200 are symmetrically arranged in a first direction; the first direction is the center line of the two junctions 300.

Specifically, as shown in fig. 3, the first profile structure 100 and the second profile structure 200 may be directly butt-jointed and fixed, but the asymmetric butt-joint design necessarily results in a high strength and a low strength, and if the stress is too large, the first profile structure must collapse or be damaged from the low strength place, which affects the product quality or the service life. The first profile structure 100 and the second profile structure 200, which are symmetrically arranged, have better performance balance at two sides, and have more balanced stress at two sides, so the strength is stronger.

Further, the first profile structure 100 and the second profile structure 200 are formed by stretching multi-angle fiber fabrics located at two outer sides and a plurality of unidirectional fibers located at the middle part to form a coated sandwich structure.

Specifically, as shown in fig. 5, the axial compression strength of the composite unidirectional fiber is high, the lateral anti-extrusion effect is enhanced, and the anti-shearing performance of the product is improved by using the multi-angle fabric fiber, so that the product performance of the section is better.

Further, the pultrusion section is formed by pultrusion of reinforcing fibers soaked in a matrix material, and the matrix material has viscosity.

Specifically, as shown in fig. 4, after the reinforcing fibers are impregnated with the viscous matrix material, the reinforcing fibers have adhesion, and the reinforcing fibers are bonded by pultrusion to form the profile of the composite material, so that the connection is more stable.

Further, the reinforcing fiber comprises one or more of unidirectional carbon fiber, multi-angle carbon fiber fabric, unidirectional glass fiber and multi-angle glass fiber fabric.

Specifically, the specific strength of the carbon fiber material is high, so that the fiber deformation of the cross beam in the pultrusion process is reduced, the rejection rate is reduced, and the product quality of parts is improved. The glass fiber can reduce the production cost. The product quality and the production cost can be balanced by combining the two.

Further, the matrix material comprises one of epoxy thermosetting resin, polyester thermosetting resin or phenolic thermosetting resin.

Specifically, the reinforcing fibers are bonded to each other by resin adhesion. The phenolic thermosetting resin is adopted, so that the heat resistance is better. The polyester thermosetting resin is adopted, so that the cost is lower. The epoxy thermosetting resin has good balance, low cost and moderate heat resistance.

Further, the joint of the first profile structure (100) and the second profile structure (200) is made of the same resin as the base material

Here, the resin used for the base material is the same as the resin used for the butt joint, and the consistency of adhesion is ensured.

The foregoing description is only exemplary of the preferred embodiments of the utility model and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, and other embodiments can be made by combining the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features and (but not limited to) features having similar functions disclosed in the present invention are mutually replaced to form the technical solution.

Claims

1. A composite pultruded profile, said profile being hollow inside, comprising:

the cross section of the first profile structure (100) perpendicular to the length direction is C-shaped, and two ends of the C-shaped cross section of the first profile structure (100) are respectively provided with a first upper joint (110) and a first lower joint (120);

the cross section of the second profile structure (200) perpendicular to the length direction is C-shaped, and two ends of the C-shaped cross section of the second profile structure (200) are respectively provided with a second upper joint (210) and a second lower joint (220);

the first upper joint (110) is butted against the second upper joint (210) or the second lower joint (220), and the first lower joint (120) is butted against the second lower joint (220) or the second upper joint (210).

2. The pultruded profile of a composite material according to claim 1, wherein the interface (300) of said first upper joint (110) and said second upper joint (210) or said second lower joint (220) is bonded by one of epoxy thermosetting resin, polyester thermosetting resin or phenolic thermosetting resin; the butt joint of the first lower joint (120) and the second lower joint (220) or the second upper joint (210) is bonded by one of epoxy thermosetting resin, polyester thermosetting resin or phenolic thermosetting resin.

3. The pultruded profile of a composite material according to claim 1, wherein said first profile structure (100) and said second profile structure (200) are arranged symmetrically in a first direction; the first direction is a central line of a joint (300) of the two.

4. The pultruded profile of composite material according to claim 1, wherein said first profile structure (100) and said second profile structure (200) are each formed by stretching a multi-angle fiber fabric on both outer sides and a plurality of unidirectional fibers in the middle to form a wrapped sandwich structure.

5. The pultruded profile of composite material according to claim 1, wherein said pultruded profile is pultruded from reinforcing fibers impregnated with a matrix material, said matrix material having a viscosity.

6. The pultruded profile of composite material according to claim 5, wherein said reinforcing fibers are one or more of unidirectional carbon fibers, multi-angle carbon fiber fabrics, unidirectional glass fibers, multi-angle glass fiber fabrics.

7. A composite pultruded profile according to claim 5, wherein said matrix material comprises one of an epoxy thermosetting resin, a polyester thermosetting resin or a phenolic thermosetting resin.

8. A composite pultruded profile according to claim 7, wherein the joint between the first profile structure (100) and the second profile structure (200) is made of the same resin as the matrix material.