CN220529435U - Carbon fiber fastener - Google Patents

Abstract

The utility model provides a carbon fiber buckle, which comprises a carbon fiber inner core and a transparent plastic skin, wherein the transparent plastic skin surrounds the surface layer at the periphery of the carbon fiber inner core, the carbon fiber inner core comprises a carbon fiber woven prepreg top layer, a carbon fiber unidirectional prepreg middle layer and a carbon fiber woven prepreg bottom layer, and the carbon fiber inner core is taken as a framework to be coated with the transparent plastic skin in an injection molding mode. The carbon fiber inner core adopts a layering structure of carbon fiber weaving texture surface and multi-layer multi-direction staggered mixed laying, so that the utility model has ultrahigh strength and excellent performance, is particularly suitable for the field of outdoor equipment, adopts a transparent high-gloss surface and ultrathin structure, is well combined with the carbon fiber inner core, is integrated into a whole after being combined, and has obvious integration effect, thereby completely revealing the touch feeling and texture of the carbon fiber.

Description

Carbon fiber fastener

Technical Field

The utility model relates to a connecting buckle, in particular to a carbon fiber buckle.

Background

The buckle is widely applied to the fields of clothing, bags, outdoor equipment and the like, and can be generally divided into an inserting buckle, a Chinese character 'ri' buckle, a ladder buckle, a hook buckle, a D buckle, a rope buckle and the like. With the rapid development of industry, consumer demands for consumer experience such as personality, fashion, science and technology, luxury and the like are growing, so that the buckle has more functions of decoration and decoration besides the function of connection.

At present, the buckle is generally made of plastic and metal, the metal buckle has the problems of heavy weight, corrosion resistance and the like, and the plastic buckle has the problem of low strength. Particularly, the field of outdoor equipment is more focused on safety, high strength and light weight, and the exposure of the technical problems is particularly remarkable.

Disclosure of Invention

The present utility model is directed to solving the above-mentioned problems and providing a carbon fiber fastener with high strength and high performance.

The utility model adopts the technical scheme that: the utility model provides a carbon fiber fastener, includes carbon fiber inner core, transparent plastic epidermis surrounds the peripheral top layer of carbon fiber inner core, the carbon fiber inner core includes carbon fiber weave prepreg top layer, the one-way prepreg intermediate level of carbon fiber, carbon fiber weave prepreg bottom, the one-way prepreg intermediate level of carbon fiber sets up between carbon fiber weave prepreg top layer and the carbon fiber weave prepreg bottom.

The carbon fiber unidirectional prepreg intermediate layer is a multi-layer, and the laying directions of carbon fiber bundles of the layer are staggered in different directions.

And the surface of the carbon fiber woven prepreg top layer and the surface of the carbon fiber woven prepreg bottom layer are provided with woven textures.

The carbon fiber tows used for the carbon fiber woven prepreg top layer and the carbon fiber woven prepreg bottom layer and the carbon fiber unidirectional prepreg middle layer have the specification of one of 1K, 3K, 6K, 12K or 24K.

The number of the layering layers of the carbon fiber unidirectional prepreg intermediate layer is 4 or more.

The angles of the layering of the carbon fiber unidirectional prepreg intermediate layer 12 are 0 degree (+/-45 degrees) and 90 degrees, and the layering sequence is mixed and paved in a multi-direction staggered manner from bottom to top according to the round sequence of 0 degree, 90 degrees, +45 degrees, -45 degrees, +45 degrees, 90 degrees and 0 degree.

The carbon fiber woven prepreg bottom layer and the carbon fiber woven prepreg top layer are both of a warp-weft interweaved structure.

The carbon fiber inner core is made of carbon fiber prepreg, and the carbon fiber prepreg is thermosetting resin carbon fiber prepreg or thermoplastic resin carbon fiber prepreg.

The carbon fiber inner core is made of a carbon fiber plate formed by compression molding or solidification molding of the cut carbon fiber prepreg.

The transparent plastic skin is composed of a layer of ultrathin transparent plastic, and the transparent plastic comprises transparent hard plastic and transparent flexible plastic.

The beneficial effects of the utility model are as follows: the utility model takes a carbon fiber inner core as a framework, and is coated with a transparent plastic skin by injection molding. The carbon fiber inner core adopts a layering structure of carbon fiber weaving texture surface and multi-layer multi-direction staggered mixed laying, so that the utility model has ultrahigh strength and excellent performance, is particularly suitable for the field of outdoor equipment, adopts a transparent high-gloss surface and ultrathin structure, is well combined with the carbon fiber inner core, is integrated into a whole after being combined, and has obvious integration effect, thereby completely revealing the touch feeling and texture of the carbon fiber. Meanwhile, the transparent plastic skin also provides good shaping, overcomes the defect that carbon fiber products are difficult to form complex appearance structures, plays a role in protecting the surface, and avoids scratching and bruising of the surface.

Drawings

FIG. 1 is an exploded view of the present utility model as a Chinese character 'ri'.

Fig. 2 is a front view of the present utility model.

Fig. 3 is a schematic cross-sectional view of A-A of fig. 2.

Fig. 4 is an exploded view of the carbon fiber unidirectional prepreg intermediate layer of the present utility model.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "leaf level," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 to 4, the present utility model provides a carbon fiber fastener, which includes a carbon fiber core 10 and a transparent plastic skin 20, wherein the transparent plastic skin 20 surrounds the surface layer of the periphery of the carbon fiber core 10, the carbon fiber core 10 includes a carbon fiber woven prepreg top layer 11, a carbon fiber unidirectional prepreg middle layer 12, and a carbon fiber woven prepreg bottom layer 13, and the carbon fiber unidirectional prepreg middle layer 12 is disposed between the carbon fiber woven prepreg top layer 11 and the carbon fiber woven prepreg bottom layer 13.

Specifically, in this embodiment, the carbon fiber unidirectional prepreg intermediate layer 12 is a multi-layered layer, and the laying directions of the carbon fiber bundles of the layer are staggered in different directions.

Further, the carbon fiber woven prepreg top layer 11 and the carbon fiber woven prepreg bottom layer 13 provide the appearance of woven textures for the carbon fiber inner core, that is, the surface of the carbon fiber woven prepreg top layer 11 and the surface of the carbon fiber woven prepreg bottom layer 13 are provided with woven textures, and the woven textures are woven according to the warp and weft interweaving rule of the carbon fiber bundles, including plain weave, twill weave and satin weave.

Further, the carbon fiber woven prepreg top layer 11, the carbon fiber woven prepreg bottom layer 12 and the carbon fiber unidirectional prepreg middle layer 12 adopt carbon fiber bundles with a filament bundle specification of 1K, 3K, 6K, 12K or 24K, preferably 3K carbon fiber bundles.

Further, the number of layers of the laid-up layers of the carbon fiber unidirectional prepreg intermediate layer 12 is determined according to the design thickness of the carbon fiber inner core, and the single-layer thickness of the carbon fiber prepreg is generally about 0.2mm, for example: when the thickness of the carbon fiber inner core is designed to be 2mm, the number of layers of the carbon fiber unidirectional prepreg intermediate layer 12 is 8, and 10 layers of the carbon fiber woven prepreg top layer 11 and the carbon fiber woven prepreg bottom layer 13 are added, and so on. Because the carbon fiber belongs to anisotropic materials, the parallel and vertical fibers have different mechanical performances, and the laying angle and the laying sequence of the carbon fiber unidirectional prepreg intermediate layer 12 are determined according to the requirements of the tensile direction and the load of the carbon fiber fastener. The angle of the layers is 0 degree (+/-45 degree) and 90 degrees, the layer with the angle of 0 degree corresponds to the positive stress, the layer with the angle of + -45 degree corresponds to the shear stress, and the layer with the angle of 90 degrees corresponds to the positive stress in the radial direction under the shear stress state. The laying sequence is preferably mixed and laid in a multi-direction from bottom to top according to the round sequence of 0 DEG, 90 DEG, +45 DEG, -45 DEG, +45 DEG, 90 DEG and 0 DEG, and the specific reference is to figure 4. Therefore, the carbon fiber bundles paved on the carbon fiber unidirectional prepreg intermediate layer 12 have different arrangement directions, and the multi-layer multi-directional staggered mixed paved paving structure adopted by the carbon fiber unidirectional prepreg intermediate layer 12 is matched with the warp-weft interweaving structure adopted by the carbon fiber woven prepreg top layer 11 and the carbon fiber woven prepreg bottom layer 13, so that the aim of multi-directional reinforcement is fulfilled, and the carbon fiber inner core has excellent mechanical properties in multiple directions. Considering the multi-directional stress requirement of the product, the number of layers of the carbon fiber inner core layer is at least 4 layers sequentially paved according to angles of 0 degree, 90 degrees, +45 degrees and-45 degrees, and in other implementation examples, the number of layers is more than 4 layers.

Further, the carbon fiber inner core 10 is made by a carbon fiber prepreg molding Process (PCM), and the carbon fiber prepreg is a thermosetting resin carbon fiber prepreg or a thermoplastic resin carbon fiber prepreg, preferably a thermoplastic resin carbon fiber prepreg, and most preferably a PC carbon fiber prepreg.

Further, the carbon fiber inner core molding Process (PCM) flow is as follows:

the first step: cutting, namely cutting the carbon fiber prepreg according to different carbon fiber bundle directions to obtain a carbon fiber inner core shape, wherein the carbon fiber inner core shape comprises the shape of buckles such as a Chinese character 'ri', a ladder buckle, a hook buckle and a D buckle;

and a second step of: laying, namely firstly laying a bottom carbon fiber woven prepreg, then laying a middle carbon fiber unidirectional prepreg, finally laying a top carbon fiber woven prepreg, and sequentially laying the cut carbon fiber prepregs to form a prepreg laminated body. The laying layer number of the carbon fiber unidirectional prepreg intermediate layer is confirmed according to the thickness of the carbon fiber inner core, and the laying angle and the laying sequence are optimally selected according to the stress direction and the load quantity of the carbon fiber fastener.

And a third step of: and (3) mould pressing, namely placing the laid prepreg laminated body into a metal mould, heating, pressurizing, solidifying, forming a carbon fiber inner core blank, and finishing after post-processing to prepare the carbon fiber inner core.

Further, the carbon fiber inner core 10 may be manufactured by CNC machining using a cured carbon fiber plate.

The carbon fiber inner core 10 is formed by carbon fibers through the process, wherein the carbon fibers are fibers with the highest specific modulus at present, the weight of the carbon fibers is light, the density of the carbon fibers is 1/4 of that of steel, and the density of the carbon fibers is 1/2 of that of aluminum alloy; the strength is high, and the tensile strength is 7 to 10 times that of steel; the specific strength is high, 16 times larger than steel and 12 times larger than aluminum alloy; at the same time, has the advantages of acid resistance, oil resistance, corrosion resistance high and low temperature resistance and other excellent performances; known as the king of new materials, also known as black gold. Therefore, the carbon fiber inner core 10 provides the carbon fiber fastener with ultra-high strength and excellent performance, and brings strong feeling of science and technology and luxury, and at the same time shows individuality and fashion. These are not comparable to conventional plastic and metal fasteners.

The transparent plastic skin covers the surface layer of the periphery of the carbon fiber inner core and is formed by injection molding and cladding technology or secondary injection molding technology to be bonded with the carbon fiber inner core in an injection molding mode.

Further, the transparent plastic skin is formed by a layer of ultrathin transparent plastic, provides touch feeling and texture for the carbon fiber buckle, protects the carbon fiber inner core and avoids surface scratch and bruise. Currently, transparent plastics are various, and there are PMMA, PC, AS, GPPS, PET, ABS, PA and PP, BS, TPU, EVA, PVC, SBS for transparent hard plastics and the like. When the surface texture of the carbon fiber buckle is designed to be hard, the transparent plastic of the transparent plastic skin is preferably PC material. When the surface texture of the carbon fiber buckle is designed to be soft, the transparent plastic of the transparent plastic skin is preferably TPU material. The transparent plastic skin adopts an ultrathin structure, the thickness is smaller than 1mm, and the thickness is preferably 0.5-0.7 mm. Meanwhile, the surface of the transparent plastic skin adopts a high-gloss mirror surface, the finish degree is more than or equal to 10, and the Ra value is more than or equal to 0.3 mu m. The ultrathin structure and the transparent highlight surface of the transparent plastic skin can better highlight the carbon fiber effect of the carbon fiber buckle in sense, and the higher the transparency of the transparent plastic skin is, the more obvious the carbon fiber effect is.

Furthermore, in order to increase the bonding strength and the bonding effect between the transparent plastic skin and the carbon fiber inner core, the carbon fiber inner core is preferably thermoplastic resin carbon fiber prepreg, PC carbon fiber prepreg is used as the best, the surface of the carbon fiber inner core formed by the PC carbon fiber prepreg shows the characteristics of PC plastic, and the compatibility of the PC plastic and most of transparent plastic materials is good. Therefore, the binding force between the transparent plastic skin and the carbon fiber inner core is high, layering and foaming phenomena can not occur, and the integrated effect is obvious after the transparent plastic skin and the carbon fiber inner core are combined. When the carbon fiber inner core selects thermosetting resin carbon fiber prepreg, the surface of the carbon fiber inner core is modified by adopting the surface or treated by using an adhesion promoter, so that the binding force between the transparent plastic skin and the carbon fiber inner core is enhanced.

Furthermore, when the transparent plastic surface plastic selects transparent PC and the carbon fiber inner core prepreg selects PC carbon fiber, the materials of the transparent plastic surface plastic and the carbon fiber inner core prepreg are completely compatible, the injection molding bonding combination is excellent, and the integrated effect after combination is more obvious. The transparent plastic skin adopts an ultrathin high-gloss transparent hard surface and is perfectly combined with the carbon fiber inner core, so that the carbon fiber buckle is integrated, the transparent plastic skin and the carbon fiber inner core are difficult to distinguish from each other in sense organ, and the touch feeling and texture of the PC carbon fiber are completely revealed.

Furthermore, when the transparent TPU is selected as the transparent plastic surface plastic and the PC carbon fiber is selected as the carbon fiber inner core prepreg, the compatibility of the transparent TPU and the PC carbon fiber is good, the injection molding bonding combination is good, and the integrated effect after the combination is also very obvious. The transparent plastic skin adopts ultra-thin high-gloss transparent flexible surface, and with the good combination connection of carbon fiber inner core, thereby makes the carbon fiber buckle is unified, is difficult to distinguish TPU transparent plastic skin and PC carbon fiber inner core from the vision, only can distinguish soft and hard two-layer structure from the sense of touch, and the transparent plastic skin of flexible TPU provides an elasticity gentle sense surface simultaneously, improves the feel comfort level of carbon fiber buckle.

Furthermore, the transparent plastic skin is molded by the injection mold, the transparent plastic belongs to thermoplastic materials, and the molecular structure is characterized by linear high molecular compounds and has thermal plasticity, so that different good shapes can be provided for the carbon fiber buckle, and the defect that the carbon fiber product is difficult to form a complex shape structure is overcome. The transparent plastic skin is preferably molded with the appearance shape of the buckles such as the Chinese character 'ri' buckle, the ladder buckle, the hook buckle, the D buckle and the like.

The embodiments of the present utility model and the accompanying drawings are only for illustrating the design concept of the present utility model, and the scope of the present utility model should not be limited to this embodiment.

From the above, it can be seen that the design object of the present utility model can be effectively implemented. Portions of the embodiments illustrate the objects of the utility model, as well as the functional and structural subject matter of the implementation, and include other equivalents and alternatives.

Therefore, the utility model is defined by the claims to include other equivalent implementations, with reference to the claims for the full scope of the claims.

Claims (9)

1. A carbon fiber fastener, characterized in that: including carbon fiber inner core, transparent plastic epidermis surrounds carbon fiber inner core outlying top layer, carbon fiber inner core include carbon fiber weave prepreg top layer, the unidirectional prepreg intermediate level of carbon fiber, carbon fiber weave prepreg bottom, the unidirectional prepreg intermediate level of carbon fiber sets up between the prepreg top layer is woven to carbon fiber and the carbon fiber weave prepreg bottom, the unidirectional prepreg intermediate level of carbon fiber is multilayer spreading, and the carbon fiber bundle of its spreading is the crisscross range of different directions.

2. The carbon fiber fastener of claim 1, wherein a surface of the top layer of carbon fiber woven prepreg and a surface of the bottom layer of carbon fiber woven prepreg are provided with woven textures.

3. The carbon fiber fastener according to claim 1, wherein the carbon fiber woven prepreg top layer, the carbon fiber woven prepreg bottom layer and the carbon fiber unidirectional prepreg middle layer adopt carbon fiber tows with a specification of one of 1K, 3K, 6K, 12K or 24K.

4. The carbon fiber fastener according to claim 1, wherein the number of the layers of the carbon fiber unidirectional prepreg intermediate layer is 4 or more.

5. The carbon fiber fastener as claimed in claim 4, wherein the angle of the layering of the carbon fiber unidirectional prepreg intermediate layer is 0 °, ±45° and 90 °, and the layering sequence is mixed in a multi-directional manner from bottom to top in the order of 0 °, 90 °, +45°, -45 °, +45 °, 90 °, 0 ° turns.

6. The carbon fiber fastener of claim 5, wherein said carbon fiber woven prepreg bottom layer and said carbon fiber woven prepreg top layer are both warp and weft interwoven structures.

7. The carbon fiber fastener according to claim 1, wherein the carbon fiber core is made of carbon fiber prepreg, and the carbon fiber prepreg is thermosetting resin carbon fiber prepreg or thermoplastic resin carbon fiber prepreg.

8. The carbon fiber fastener of claim 1, wherein said carbon fiber core is made of carbon fiber sheet formed by compression molding or curing of cut carbon fiber prepreg.

9. The carbon fiber fastener of claim 1, wherein said transparent plastic skin is formed of a layer of ultra-thin transparent plastic, said transparent plastic comprising a transparent hard plastic, a transparent flexible plastic.