Joint structure of stitch-knitted fabric
By designing a stitched fabric connection structure and utilizing the fixing methods of snap-fit parts and covering layers, the problems of mold blockage when stitched fabrics have high thickness requirements and tearing when they are thin are solved, achieving uniform stress and firm connection, and ensuring the continuity of production.
Patent Information
- Application Number
- CN202423059607.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-12
AI Technical Summary
In existing technologies, woven fabrics are prone to mold blockage or slippage when the thickness requirement is high, and are prone to tearing when the thickness is thin, resulting in difficulties in bonding and making it impossible to achieve continuous and uninterrupted production.
The structure uses a stitched woven fabric connection, which is spliced together by the first and second snap-fit parts and then wrapped and fixed with a covering layer to form a uniform stress state and avoid sudden stress changes.
It achieves a strong connection between the stitched and woven fabrics, avoids mold blockage, tearing and slippage, and ensures smooth continuous production.
Smart Images
Figure CN223545535U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sewn fabric technology, and in particular to a sewn fabric connection structure. Background Technology
[0002] Fiber-reinforced composite materials have the characteristics of being lightweight, high-strength, corrosion-resistant, energy-saving, and environmentally friendly, and their applications are becoming increasingly widespread. The production of composite materials is gradually trending towards automation and mechanized continuous production. Among them, the pultrusion process has low emissions from closed-mold molding, high production efficiency from continuous molding, and high strength of products with high fiber content.
[0003] With the development of pultrusion technology, product thicknesses ranging from one millimeter to tens of millimeters can be produced. As the requirements for the thickness of reinforcing materials become increasingly stringent, a new challenge has been placed on reinforcing material manufacturers: the joints between fabrics and fibers must have sufficient strength and ensure unobstructed passage through the mold. Currently, thicker products are primarily joined by overlapping, but this is prone to mold blockage or slippage; for thinner products, tearing is likely to occur, making joining impossible. Utility Model Content
[0004] The purpose of this utility model is to provide a stitched fabric connection structure to solve the problems existing in the prior art. The two sections of fabric are firmly connected, the force is evenly distributed at the connection part, and the fabric is prevented from blocking the mold and tearing and slipping.
[0005] To achieve the above objectives, this utility model provides the following solution:
[0006] This utility model provides a stitched fabric connection structure, including a first snap-fit part, a second snap-fit part, and a covering layer. The shape and size of the first snap-fit part and the second snap-fit part are matched. The first snap-fit part is used to be disposed at one end of a stitched fabric unit, and the second snap-fit part is used to be disposed at one end of an adjacent stitched fabric unit. The two adjacent stitched fabric units can be spliced into a whole through the first snap-fit part and the second snap-fit part. The covering layer can cover the spliced first snap-fit part and the second snap-fit part. The first snap-fit part, the second snap-fit part, and the covering layer are fixedly connected.
[0007] Preferably, it also includes sutures, and the first snap-fit portion, the second snap-fit portion, and the covering layer are sutured and fixed together by the sutures.
[0008] Preferably, the covering layer is a polyester nonwoven fabric.
[0009] Preferably, the weight per unit area of the polyester nonwoven fabric is 5–30 g / m². 2 .
[0010] Preferably, the suture is a glass fiber suture.
[0011] Preferably, the first snap-fit portion is a V-shaped groove, and the second snap-fit portion is a V-shaped protrusion.
[0012] Preferably, the first snap-fit portion is a plurality of V-shaped grooves spaced apart along the wide side of the woven fabric unit, and the second snap-fit portion is a plurality of V-shaped protrusions spaced apart along the wide side of the woven fabric unit.
[0013] Preferably, the angle between the hypotenuse of the V-groove and the long side of the woven fabric unit is 30° to 60°.
[0014] Preferably, the first snap-fit portion has a first bevel angle, and the second snap-fit portion has a second bevel angle.
[0015] Preferably, the angle between the hypotenuse of the first oblique angle and the long side of the woven fabric unit is 30° to 60°.
[0016] The present invention achieves the following technical advantages over the prior art:
[0017] This utility model provides a stitched fabric connection structure in which two adjacent stitched fabric units can be spliced into a whole by matching first and second snap-fit parts. Then, the spliced first and second snap-fit parts are wrapped and fixed by a covering layer. After this treatment, the stitched fabric is in a gradual transition state when it enters the die, the stress is relatively uniform, the stress will not change suddenly, it is not easy to tear or slip, and it will not cause die blockage. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of two stitch-knitted fabric units in Example 1;
[0020] Figure 2 This is a schematic diagram of the connection between two stitched fabric units in Example 1;
[0021] Figure 3 This is a schematic diagram of the structure of two stitch-knitted fabric units in Example 2;
[0022] Figure 4 This is a schematic diagram of the connection between two stitched fabric units in Example 2;
[0023] Figure 5 This is a schematic diagram of the structure of two stitch-knitted fabric units in Example 3;
[0024] Figure 6 This is a schematic diagram of the connection between two stitched fabric units in Example 3.
[0025] In the diagram: 1-stitched fabric unit; 2-V-groove; 3-V-shaped protrusion; 4-covering layer; 5-seam; 6-first bevel; 7-second bevel. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] The purpose of this utility model is to provide a stitched fabric connection structure to solve the problems existing in the prior art. The two sections of fabric are firmly connected, the force is evenly distributed at the connection part, and the fabric is prevented from blocking the mold and tearing and slipping.
[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0029] Example 1
[0030] This embodiment provides a stitched woven fabric connection structure, such as Figure 1-2As shown, the assembly includes a first snap-fit part, a second snap-fit part, and a covering layer 4. The first snap-fit part and the second snap-fit part are matched in shape and size. The first snap-fit part is used to be set at one end of a knitted fabric unit 1, and the second snap-fit part is used to be set at one end of an adjacent knitted fabric unit 1. The two adjacent knitted fabric units 1 can be spliced into a whole through the first snap-fit part and the second snap-fit part. The covering layer 4 can wrap the spliced first snap-fit part and the second snap-fit part, and the first snap-fit part, the second snap-fit part, and the covering layer 4 are fixedly connected. The two adjacent knitted fabric units 1 can be spliced into a whole through the matching first snap-fit part and the second snap-fit part, and then the covering layer 4 wraps and fixes the spliced first snap-fit part and the second snap-fit part. After processing in this way, the knitted fabric is in a gradual transition state when it enters the die, the stress is relatively uniform, the stress will not change suddenly, it is not easy to tear or slip off, and it will not cause die blockage. In a further preferred embodiment, the first snap-fit portion and the second snap-fit portion are obtained by inserting and cutting at the joint of the sewn-knitted fabric unit 1, and can be reasonably cut according to the structure of the sewn-knitted fabric unit 1.
[0031] In a further preferred embodiment of this invention, the stitched braided fabric connection structure further includes a suture 5. The first snap-fit portion, the second snap-fit portion, and the covering layer 4 are stitched and fixed together by the suture 5. The suture 5 is a glass fiber suture 5, i.e., 35-100 tex glass fiber coated with polyester resin. The suture 5 ensures the firmness and flatness of the connection between the first snap-fit portion, the second snap-fit portion, and the covering layer 4. The stitching shape of the suture 5 is a parallel line.
[0032] In a further preferred embodiment of this invention, the covering layer 4 is a polyester nonwoven fabric, and the weight of the polyester nonwoven fabric per unit area is 5-30 g / m². 2 The covering layer 4 is softer and lighter, so even when it covers the surfaces of the first and second snap-fit parts, it does not add much weight and reduces the bulkiness of the connection parts.
[0033] In a further preferred embodiment of this invention, when the width of the woven fabric unit 1 is narrow, the first snap-fit part is a V-shaped groove 2 and the second snap-fit part is a V-shaped protrusion 3.
[0034] In a further preferred embodiment of this invention, the angle α between the hypotenuse of the V-groove 2 and the long side of the woven fabric unit 1 is 30° to 60°.
[0035] Example 2
[0036] This embodiment provides a stitched woven fabric connection structure, such as Figure 3-4As shown, unlike the scheme in Embodiment 1, the first snap-fit portion consists of multiple V-shaped grooves 2 spaced apart along the wide side of the knitted fabric unit, and the second snap-fit portion consists of multiple V-shaped protrusions 3 spaced apart along the wide side of the knitted fabric unit. For a wider knitted fabric unit 1, the multiple V-shaped grooves 2 and multiple V-shaped protrusions 3 can be spliced together to make the connection more secure. The appropriate number of V-shaped grooves 2 or V-shaped protrusions 3 can be set according to the width of the knitted fabric unit 1.
[0037] Example 3
[0038] This embodiment provides a stitched woven fabric connection structure, such as Figure 5-6 As shown, unlike the scheme in Embodiment 1, the first snap-fit part is at a first oblique angle 6, and the second snap-fit part is at a second oblique angle 7.
[0039] In a further preferred embodiment of this invention, the angle b between the hypotenuse of the first oblique angle 6 and the long side of the woven fabric unit 1 is 30° to 60°.
[0040] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A stitched woven fabric connection structure, characterized in that: It includes a first snap-fit portion, a second snap-fit portion, and a covering layer. The first snap-fit portion and the second snap-fit portion are matched in shape and size. The first snap-fit portion is used to be disposed at one end of a knitted fabric unit, and the second snap-fit portion is used to be disposed at one end of an adjacent knitted fabric unit. The two adjacent knitted fabric units can be spliced into a whole by the first snap-fit portion and the second snap-fit portion. The covering layer can cover the spliced first snap-fit portion and the second snap-fit portion. The first snap-fit portion, the second snap-fit portion, and the covering layer are fixedly connected.
2. The stitch-woven fabric connection structure according to claim 1, characterized in that: It also includes sutures, and the first snap-fit portion, the second snap-fit portion, and the covering layer are sutured and fixed together by the sutures.
3. The stitch-woven fabric connection structure according to claim 1, characterized in that: The covering layer is a polyester nonwoven fabric.
4. The stitch-woven fabric connection structure according to claim 3, characterized in that: The weight per unit area of the polyester nonwoven fabric is 5-30 g / m². 2 .
5. The stitch-woven fabric connection structure according to claim 2, characterized in that: The suture is a glass fiber suture.
6. The stitch-woven fabric connection structure according to claim 1, characterized in that: The first snap-fit part is a V-shaped groove, and the second snap-fit part is a V-shaped protrusion.
7. The stitch-woven fabric connection structure according to claim 6, characterized in that: The first snap-fit portion consists of a plurality of V-shaped grooves spaced apart along the wide side of the woven fabric unit, and the second snap-fit portion consists of a plurality of V-shaped protrusions spaced apart along the wide side of the woven fabric unit.
8. The stitch-woven fabric connection structure according to claim 6, characterized in that: The angle between the hypotenuse of the V-groove and the long side of the woven fabric unit is 30° to 60°.
9. The stitch-woven fabric connection structure according to claim 1, characterized in that: The first snap-fit part has a first bevel angle, and the second snap-fit part has a second bevel angle.
10. The stitch-woven fabric connection structure according to claim 9, characterized in that: The angle between the hypotenuse of the first oblique angle and the long side of the woven fabric unit is 30° to 60°.