Bracket and Its Preparation Process

Abstract

The present invention discloses a bracket and its preparation process. In the present invention, a bracket includes: a hanging ear angle piece, the hanging ear angle piece having a connecting portion and a positioning portion bent and connected to one end of the connecting portion; and a through hole is provided on the connecting portion; a supporting angle piece, the supporting angle piece having a matching portion connected to the hanging ear angle piece and a supporting portion bent and connected to the matching portion, and the extending direction of the supporting portion is opposite to the extending direction of the positioning portion; and a base, the base being connected to the hanging ear angle piece and the supporting angle piece, and the base covering the supporting portion and the positioning portion; the hanging ear angle piece and the supporting angle piece are continuous fiber reinforced thermoplastic composite parts, and the base is a short fiber reinforced thermoplastic composite part. Compared with the prior art, the advantages of lightweight, high strength, excellent toughness, and good fatigue resistance of the bracket are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation manufacturing, and particularly relates to a bracket and a preparation process thereof. Background Art

[0002] In the technical field of aviation manufacturing, in addition to the need for excellent toughness, impact damage resistance, and fatigue and durability in the fuselage structure, the same properties are also required in the in-cabin auxiliary structures such as interior decoration, electrical appliances, environmental control pipelines and their brackets, equipment connection brackets, and cable connection brackets. When the existing in-fuselage cables are laid out, they are supported by brackets. However, the existing brackets are mainly made of metal, which is too heavy itself and brings load to the aircraft when used in the fuselage. Moreover, during the long-term use of the aircraft, the impact damage resistance and fatigue and durability of the existing brackets cannot meet the usage requirements and need to be further optimized, so that the overall performance of the aircraft can also be further optimized. Summary of the Invention

[0003] The purpose of the present invention is to provide a bracket and a preparation process thereof, realizing the advantages of lightweight, high strength, excellent toughness, and good fatigue resistance of the bracket.

[0004] To solve the above technical problems, an embodiment of the present invention provides a bracket, including:

[0005] A hanging ear angle piece, the hanging ear angle piece has a connecting portion and a positioning portion bent and connected to one end of the connecting portion; and a through hole is provided on the connecting portion;

[0006] A supporting angle piece, the supporting angle piece has a matching portion connected to the hanging ear angle piece and a supporting portion bent and connected to the matching portion, and the extending direction of the supporting portion is opposite to the extending direction of the positioning portion; and

[0007] A base, the base is connected to the hanging ear angle piece and the supporting angle piece, and the base covers the supporting portion and the positioning portion;

[0008] Wherein, the hanging ear angle piece and the supporting angle piece are continuous fiber reinforced thermoplastic composite parts, and the base is a short fiber reinforced thermoplastic composite part.

[0009] In one embodiment, both the hanging ear angle piece and the supporting angle piece are integrally formed by injection molding.

[0010] In one embodiment, the hanging ear angle piece, the supporting angle piece, and the base all have a fiber material and a resin material; wherein the fiber material is one or more of glass fiber, carbon fiber, and polyimide fiber, and the resin material is one or more of polyether ether ketone, polyarylether ketone, polyether ketone ketone, polyphenylene sulfide, polyetherimide, and poly(phenylene sulfone).

[0011] In one embodiment, an installation hole for the fitting part to be embedded is formed in the connecting part; and the installation hole is located below the through hole.

[0012] In one embodiment, the thickness of the fitting part is equal to the depth of the installation hole.

[0013] In one embodiment, the base has a bottom plate part for covering the positioning part and the supporting part, and a vertical plate part connected to the bottom plate part; the height of the vertical plate part is not lower than the highest point of the installation hole, and the vertical plate part has a cavity with an upward opening, and part of the connecting part and part of the fitting part are arranged in the cavity, and the vertical plate part covers part of the connecting part and part of the fitting part.

[0014] In one embodiment, the base further has a reinforcing rib for supporting the bottom plate part and the vertical plate part;

[0015] A hollow area is further formed in the vertical plate part.

[0016] In one embodiment, the thickness of the hanging ear angle piece and the supporting angle piece is 1.5 - 2.5 mm.

[0017] An embodiment of the present invention provides a preparation process of a bracket for preparing the bracket according to any one of claims 1 - 8, including the following steps:

[0018] Obtain continuous fiber reinforced thermoplastic composite prepregs of multiple layers with preset sizes, weld them and put them into a mold;

[0019] Put the mold into a press, and perform hot pressing on the prepregs in the mold to form a plate;

[0020] Process the plate to obtain a hanging ear angle piece and a supporting angle piece;

[0021] Connect the hanging ear angle piece and the supporting angle piece and put them into an injection mold, and perform injection molding on the supporting part and the positioning part through short - cut fiber reinforced thermoplastic composite to form a fiber reinforced thermoplastic composite bracket.

[0022] In one embodiment, in the step of performing hot pressing on the prepregs welded in the mold to form a plate, the pressure applied is 2 - 5 MPa, the heating rate is 5 - 10 °C / min, and the heat preservation duration is 5 - 20 min.

[0023] Compared with the prior art, in the embodiment of the present invention, by providing ear lugs and corner pieces through which the cable can pass, the cable is guided and positioned, and the support corner pieces and the ear lugs and corner pieces are cooperatively arranged on the base, so as to stably support the cable by the support corner pieces. The ear lugs and corner pieces and the support corner pieces are continuous fiber reinforced thermoplastic composite parts, which can ensure the stable support of the cable while ensuring the support strength, will not deform under high-speed impact, have strong impact resistance and fatigue durability, and are light in weight. At the same time, the base is a short fiber reinforced thermoplastic composite part, which makes the bracket more lightweight while forming the bracket, optimizes the comprehensive performance of the bracket, and further optimizes the performance of the aircraft when used in the aircraft.

[0024] Compared with the brackets used in existing aircraft, this embodiment has the following remarkable effects: (1) Using carbon fiber reinforced thermoplastic composites to prepare the cable series connection bracket has the advantages of high strength, light weight, excellent toughness, impact resistance and damage tolerance compared with the brackets prepared by traditional metal materials; compared with thermosetting resin matrix composites, the processing and molding cycle is short and it has stronger processability; (2) Using continuous fiber reinforced thermoplastic composites as the load-bearing components, namely the ear lugs and corner pieces and the support corner pieces, and using short fiber reinforced thermoplastic composites as the support structure, namely the base, to fix the ear lugs and corner pieces and the support corner pieces, can improve the strength, stability and connection processability of the bracket. (3) By adopting the die pressing and hybrid rapid injection molding process, the structural strength of the bracket is improved, the time used for manufacturing the bracket is reduced, and the production efficiency of the bracket is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] One or more embodiments are illustrated by way of example in the accompanying drawings, which do not constitute a limitation to the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the figures do not constitute a proportional limitation.

[0026] Figure 1 is a schematic structural diagram of the bracket in the first embodiment of the present invention;

[0027] Figure 2 is a schematic structural diagram of the ear lugs and corner pieces in the first embodiment of the present invention;

[0028] Figure 3 is a schematic structural diagram of the support corner pieces in the first embodiment of the present invention;

[0029] Figure 4 is a schematic structural diagram of the ear lugs and corner pieces and the support corner pieces after connection in the first embodiment of the present invention;

[0030] Figure 5 is a schematic structural diagram of the base in the first embodiment of the present invention;

[0031] Figure 6 It is a schematic structural diagram of the preparation process of the bracket in the second embodiment of the present invention;

[0032] Description of the drawings: 100, bracket; 1, hanging ear angle piece; 11, connecting part; 12, positioning part; 13, through hole; 14, mounting hole; 2, supporting angle piece; 21, matching part; 22, supporting part; 3, base; 31, bottom plate part; 32, vertical plate part; 33, reinforcing rib; 34, cavity; 35, hollow area; 211, vertical surface of the matching part; 111, vertical surface of the connecting part. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will elaborate on each embodiment of the present invention in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present invention, many technical details are presented for the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can still be implemented.

[0034] In the following description, certain specific details are set forth for the purpose of explaining various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments can be practiced without one or more of these specific details. In other instances, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail so as not to unnecessarily obscure the description of the embodiments.

[0035] Unless the context requires otherwise, throughout the specification and claims, the words "comprise" and its variants, such as "comprising" and "having", should be understood in an open, inclusive sense, i.e., construed as "including, but not limited to".

[0036] The following will elaborate on each embodiment of the present invention in conjunction with the accompanying drawings to more clearly understand the objectives, features, and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not limitations on the scope of the present invention, but only to illustrate the essential spirit of the technical solutions of the present invention.

[0037] References to "one embodiment" or "an embodiment" throughout the specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" throughout the specification do not necessarily all refer to the same embodiment. Additionally, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0038] As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally used in its inclusive sense of "and / or" unless the context clearly dictates otherwise.

[0039] In the following description, in order to clearly show the structure and working mode of the present invention, many directional terms will be used for description. However, terms such as "front", "rear", "left", "right", "outer", "inner", "outward", "inward", "up", and "down" should be understood as convenient terms and should not be understood as restrictive terms.

[0040] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0041] The first embodiment of the present invention relates to a bracket. As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 shown, the bracket 100 is a fiber-reinforced thermoplastic composite bracket 100, which is used on an aircraft to support cables. The bracket 100 includes: a lug angle piece 1, a support angle piece 2, and a base 3. The lug angle piece 1 has a connecting portion 11 and a positioning portion 12 bent and connected to one end of the connecting portion 11, and a through hole 13 is provided in the connecting portion 11, and the cable can pass through the through hole 13. The support angle piece 2 has a mating portion 21 connected to the lug angle piece 1 and a support portion 22 bent and connected to the mating portion 21, and the extending direction of the support portion 22 is opposite to the extending direction of the positioning portion 12. The base 3 is connected to the lug angle piece 1 and the support angle piece 2, and the base 3 covers the support portion 22 and the positioning portion 12. The lug angle piece 1 and the support angle piece 2 are continuous fiber-reinforced thermoplastic composite parts, and the base 3 is a short fiber-reinforced thermoplastic composite part.

[0042] As can be seen from the above, by providing the lug angle piece 1, the cable can pass through, guiding and positioning the cable, and the support angle piece 2 is arranged in cooperation with the lug angle piece 1 on the base 3 to realize the stable support of the cable by the support angle piece 2. The lug angle piece 1 and the support angle piece 2 being continuous fiber-reinforced thermoplastic composite parts enables stable support of the cable while ensuring the support strength, without deforming under high-speed impact, having strong anti-impact damage ability and fatigue durability, and being light in weight. At the same time, the base 3 is a short fiber-reinforced thermoplastic composite part, which makes the bracket 100 more lightweight when the bracket 100 is formed, optimizes the comprehensive performance of the bracket 100, and when used in an aircraft, the performance of the aircraft can also be further optimized.

[0043] Furthermore, as Figure 1 、 Figure 2 、 Figure 4 shown, the shape of the connecting portion 11 can be the same asFigure 2 They have different shapes, but the through-hole 13 exists. To meet the use strength and be lightweight enough, the hanging ear angle piece 1 and the support angle piece 2 are continuous fiber reinforced thermoplastic composite parts. Obtain continuous fiber reinforced thermoplastic composite prepregs with multiple preset sizes, stack them and put them into a mold, inject and form a plate, and then machine process, cut and bend the plate to form the hanging ear angle piece 1 and the support angle piece 2. Due to the characteristics of continuous fiber reinforced thermoplastic composites, the hanging ear angle piece 1 and the support angle piece 2 are two independent parts, and the positioning part 12 in the hanging ear angle piece 1 is bent in one direction without any parts bent in other directions, and the same is true for the support angle piece 2. After the hanging ear angle piece 1 and the support angle piece 2 are spliced together, the extending direction of the support part 22 is opposite to the extending direction of the positioning part 12, making the support part 22 in two directions of the bracket 100 have better stability. Put the two formed hanging ear angle pieces 1 and support angle pieces 2 into an injection mold, and use short fiber reinforced thermoplastic composites to inject in an injection molding machine. The short fiber reinforced thermoplastic composites form the base 3 to cover the support part 22 and the positioning part 12, and cover the connecting part 11 and the mating part 21 to obtain the formed bracket 100.

[0044] Furthermore, both the hanging ear angle piece 1 and the support angle piece 2 are integrally formed by injection molding.

[0045] Furthermore, both the hanging ear angle piece 1, the support angle piece 2 and the base 3 have fiber materials and resin materials; the fiber materials are one or more of glass fiber, carbon fiber, polyimide fiber, etc., and the resin materials are one or more of polyether ether ketone, polyarylether ketone, polyether ketone ketone, polyphenylene sulfide, polyetherimide and polyphenylene sulfone, etc.

[0046] Optionally, the hanging ear angle piece 1 and the support angle piece 2 can be continuous carbon fiber fabric reinforced PEEK resin matrix composites, and the base 3 can be short cut carbon fiber fabric reinforced PEEK resin matrix composites. Or the hanging ear angle piece 1 and the support angle piece 2 can be continuous glass fiber reinforced PPS resin matrix composites, and the base 3 can be short cut glass fiber reinforced PPS resin matrix composites.

[0047] Furthermore, as Figure 2 、 Figure 3 、 Figure 4 shown, an installation hole 14 for the mating part 21 to be embedded is provided on the connecting part 11, and the installation hole 14 is located below the through-hole 13.

[0048] Preferably, as Figure 2 、 Figure 3 、 Figure 4As shown, the thickness of the fitting portion 21 is equal to the depth of the mounting hole 14, that is, the mounting hole 14 is completely filled by the fitting portion 21. On the vertical surface of the connecting portion 11, the fitting portion 21 filled in the mounting hole 14 neither protrudes outside the mounting hole 14 nor shrinks inside the mounting hole 14, but is flush with the opening of the mounting hole 14. At the arc transition between the connecting portion 11 and the positioning portion 12, the fitting portion 21 gradually extends to be connected to the supporting portion 22 outside the mounting hole 14. The plane where the fitting portion 21 and the orifice of the mounting hole 14 are located is in the same plane, that is, the vertical surface 211 of the fitting portion 21 and the vertical surface 111 of the connecting portion 11 in the figure are in the same vertical plane.

[0049] In addition, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the base 3 has a bottom plate portion 31 for covering the positioning portion 12 and the supporting portion 22, and a vertical plate portion 32 connected to the bottom plate portion 31. The height of the vertical plate portion 32 is not lower than the highest point of the mounting hole 14, and the vertical plate portion 32 has a cavity 34 with an upward opening. Part of the connecting portion 11 and part of the fitting portion 21 are arranged in the cavity 34, and the vertical plate portion 32 covers part of the connecting portion 11 and part of the fitting portion 21. The bottom plate portion 31 is in a cube shape, the upper part of the connecting portion 11 is arc-shaped, and there is a through hole 13 with a round hole in the middle. The structures of the bottom plate portion 31 and the connecting portion 11 are not limited to this and can be changed accordingly.

[0050] In addition, as Figure 1 and Figure 5 shown, the base 3 also has a reinforcing rib 33 for supporting the bottom plate portion 31 and the vertical plate portion 32. A hollow area 35 is also formed on the vertical plate portion 32.

[0051] In addition, as Figure 2 , Figure 3 , Figure 4 shown, the thickness of the hanging ear angle piece 1 and the supporting angle piece 2 is 1.5 - 2.5 mm. Optionally, the thickness of the hanging ear angle piece 1 and the supporting angle piece 2 is 1.6 mm, 1.8 mm, 2 mm or 2.2 mm.

[0052] The second embodiment of the present invention relates to a preparation process of a bracket 100. As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 shown, it is used to prepare the bracket 100 in the above embodiment, and includes the following steps:

[0053] Step 100: Obtain prepregs of continuous fiber reinforced thermoplastic composites with multiple preset dimensions, weld them, and place them in a mold. Specifically, multiple layers of continuous fiber reinforced thermoplastic composites need to be laid up. The laying-up methods can be various, such as 0℃, 90℃, ±45℃, etc. After laying up, the prepregs can be welded.

[0054] Step 200: Place the mold in a press and perform hot pressing and forming on the welded prepregs in the mold.

[0055] Step 300: Process the plate to obtain lug angle piece 1 and support angle piece 2.

[0056] Step 400: Connect lug angle piece 1 and support angle piece 2, place them in an injection mold, and perform injection molding and coating on the support part 22 and positioning part 12 with short fiber reinforced thermoplastic composites to form a fiber reinforced thermoplastic composite bracket 100.

[0057] Further, in the step of performing hot pressing and forming on the welded prepregs in the mold to form a plate, the pressure applied is 2 - 5 MPa, the heating rate is 5 - 10℃ / min, and the heat preservation duration is 5 - 20 min.

[0058] The following takes the preparation of a carbon fiber fabric reinforced PEEK resin matrix composite bracket 100 and a glass fiber reinforced PPS resin matrix composite bracket 100 as examples for specific description.

[0059] (1) Carbon fiber fabric reinforced PEEK resin matrix composite bracket 100

[0060] Step 111: Cut 8 pieces of continuous carbon fiber fabric reinforced PEEK resin matrix composite prepregs with a size of 100 mm × 100 mm, stack them together, and place them in a self-made mold coated with a release agent.

[0061] Step 212: Place the mold in a press, start heating from room temperature at a heating rate of 10℃ / min, then apply a pressure of 2 MPa to the mold, and then hold the pressure. When the material temperature reaches 360℃, keep it warm for 20 min, and cool it to 70℃ at a speed of 5℃ / min and then take it out.

[0062] Step 313: Through machining treatment, obtain lug angle piece 1 and support angle piece 2 with a thickness of 2 mm. Specifically, cut the plate into the required shape, and then bend it into the required shape to form lug angle piece 1 and support angle piece 2.

[0063] Step 414: Set the nozzle temperature of the injection molding machine to 390℃ and the upper and lower mold temperatures to 150℃. Place the spliced lug angle piece 1 and support angle piece 2 in the injection mold, perform injection molding with the prepared short fiber reinforced PEEK resin matrix composite, and then take it out to obtain a carbon fiber fabric reinforced PEEK resin matrix composite bracket 100.

[0064] (2) Glass Fiber Reinforced PPS Resin Matrix Composite Bracket 100

[0065] Step 121: Cut 16 pieces of continuous glass fiber reinforced PPS resin matrix composite prepregs with a size of 100mm×100mm and stack them together in a 90℃ layup manner, then place them in a self-made mold coated with a release agent.

[0066] Step 222: Place the mold in a press, heat it from room temperature at a heating rate of 5℃ / min, then apply a pressure of 2MPa to the mold and keep the pressure; when the material temperature reaches 300℃, hold for 40min, and then cool it to 80℃ at a cooling rate of 5℃ / min and take it out.

[0067] Step 323: Through machining treatment, obtain a lug-shaped angle piece and a support angle piece 2 with a thickness of 2.2mm.

[0068] Step 424: Set the nozzle temperature of the injection molding machine to 330℃ and the upper and lower mold temperatures to 120℃. Place the spliced lug angle piece 1 and support angle piece 2 into the injection mold, inject using the prepared short fiber reinforced PPS resin matrix composite, and then take it out to obtain the glass fiber reinforced PPS resin matrix composite bracket 100.

[0069] Compared with the brackets used in existing aircraft, this embodiment has the following remarkable effects: (1) Using carbon fiber reinforced thermoplastic composites to prepare cable connection brackets has the advantages of high strength, light weight, excellent toughness, impact resistance, and damage tolerance compared with the brackets made of traditional metal materials; compared with thermosetting resin matrix composites, the processing and molding cycle is short, and it has stronger processability; (2) Using continuous fiber reinforced thermoplastic composites as load-bearing components, namely lug angle pieces and support angle pieces, and using short fiber reinforced thermoplastic composites as the support structure, namely the base, to fix the lug angle pieces and support angle pieces can improve the strength, stability, and connection processability of the bracket. (3) By adopting the molding process of compression molding and rapid injection molding, the structural strength of the bracket is improved, the time used for manufacturing the bracket is reduced, and the production efficiency of the bracket is increased.

[0070] The preferred embodiments of the present invention have been described in detail above, but it should be understood that if necessary, aspects of the embodiments can be modified to adopt aspects, features, and concepts of various patents, applications, and publications to provide additional embodiments.

[0071] Considering the above detailed description, these and other changes can be made to the embodiments. Generally speaking, in the claims, the terms used should not be considered as limited to the specific embodiments disclosed in the specification and claims, but should be understood to include all possible embodiments and the entire equivalent scope enjoyed by these claims.

[0072] The step division of the above various methods is only for clear description. When implemented, they can be combined into one step or some steps can be split into multiple steps. As long as the same logical relationship is included, they are all within the protection scope of this patent; making insignificant modifications to the algorithm or adding insignificant designs to the process, but without changing the core design of the algorithm and process, are all within the protection scope of this patent.

[0073] It is not difficult to find that this embodiment is a system embodiment corresponding to the first embodiment, and this embodiment can be implemented in cooperation with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment. To avoid repetition, they will not be elaborated here. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied to the first embodiment.

[0074] Those of ordinary skill in the art can understand that the above various embodiments are specific embodiments for implementing the present invention. In actual applications, various changes can be made in form and details without departing from the spirit and scope of the present invention.

Claims

1. A bracket, characterized in that, Comprising: An ear-hanging corner piece, which has a connecting portion and a positioning portion bent and connected to one end of the connecting portion; and a through hole is provided on the connecting portion; A supporting corner piece, which has a mating portion connected to the ear-hanging corner piece and a supporting portion bent and connected to the mating portion, and the extending direction of the supporting portion is opposite to the extending direction of the positioning portion; and A base, which is connected to the ear-hanging corner piece and the supporting corner piece, and the base covers the supporting portion and the positioning portion; Wherein, the ear-hanging corner piece and the supporting corner piece are continuous fiber reinforced thermoplastic composite parts, and the base is a short fiber reinforced thermoplastic composite part; the ear-hanging corner piece and the supporting corner piece are laminated by multiple layers of continuous fiber reinforced thermoplastic composite prepregs with preset sizes, and the short fiber reinforced thermoplastic composite is injection molded to cover the supporting portion and the positioning portion to form a fiber reinforced thermoplastic composite bracket; An installation hole for the mating portion to be embedded is provided on the connecting portion; and the installation hole is located below the through hole.

2. The bracket according to claim 1, wherein Both the ear-hanging corner piece and the supporting corner piece are integrally formed by injection molding.

3. The bracket according to claim 1, characterized in that, The ear-hanging corner piece, the supporting corner piece and the base all have a fiber material and a resin material; wherein the fiber material is one or more of glass fiber, carbon fiber, and polyimide fiber, and the resin material is one or more of polyether ether ketone, polyarylether ketone, polyether ketone ketone, polyphenylene sulfide, polyetherimide, and polyphenylene sulfone.

4. The bracket according to claim 1, wherein, The thickness of the mating portion is equal to the depth of the installation hole.

5. The bracket according to claim 1, characterized in that, The base has a bottom plate portion for covering the positioning portion and the supporting portion, and a vertical plate portion connected to the bottom plate portion; the height of the vertical plate portion is not lower than the highest point of the installation hole, and the vertical plate portion has a cavity with an upward opening, and part of the connecting portion and part of the mating portion are arranged in the cavity, and the vertical plate portion covers part of the connecting portion and part of the mating portion.

6. The bracket according to claim 5, wherein, The base also has a reinforcing rib for supporting the bottom plate portion and the vertical plate portion; A hollow area is also provided on the vertical plate portion.

7. The bracket according to claim 1, characterized in that, The thickness of the ear-hanging corner piece and the supporting corner piece is 1.5 - 2.5 mm.

8. A preparation process of a bracket, characterized in that, For preparing the bracket according to any one of claims 1 - 7, the following steps are included: Obtain multiple layers of continuous fiber reinforced thermoplastic composite prepregs with preset sizes, weld them and put them into a mold; Put the mold into a press, and hot press the prepregs in the mold to form a plate; Process the plate to obtain the ear-hanging corner piece and the supporting corner piece; Connect the ear-hanging corner piece and the supporting corner piece and put them into an injection mold, and injection mold the supporting portion and the positioning portion with short fiber reinforced thermoplastic composite to form a fiber reinforced thermoplastic composite bracket.

9. The preparation process according to claim 8, characterized in that, In the step of hot pressing the prepregs welded in the mold to form a plate, the pressure applied is 2 - 5 MPa, the heating rate is 5 - 10 °C / min, and the heat preservation duration is 5 - 20 min.

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