Manufacturing method of racket with built-in 3D printing piece

Abstract

The invention discloses a manufacturing method of a racket with a built-in 3D printed piece. The manufacturing method comprises the following steps that (1) the 3D printed piece is manufactured in a 3D printing mode; (2) paving a filling layer which can be extruded or foamed to be filled into an internal gap of the 3D printing piece in a hollow cavity on the outer side and / or in the 3D printing piece, so as to form a core body; (3) placing the core body in the fiber outer layer which is heated and cured or not heated and cured; the 3D printing piece is arranged, an extrusion or foaming mode is adopted in a matched mode to enable substances of the filling layer to be filled into internal gaps of the 3D printing piece, so that the 3D printing piece, the filling layer and the fiber outer layer are combined together, a structure similar to reinforced concrete is formed, and the 3D printing piece is equivalent to a steel bar frame structure in the reinforced concrete; the structural strength of the center of the racket can be effectively enhanced, and the racket is prevented from being broken easily, so that the ball hitting force is enhanced, and the usability of the product is better.

Description

Technical Field

[0001] The present invention relates to the technology of racket field, and in particular to a method for manufacturing a racket with built-in 3D printed parts. Background Art

[0002] Rackets (such as badminton rackets, tennis rackets, etc.) are high-explosive sports equipment, with the following characteristics: less material usage, higher net pressure tension on the racket frame, and greater deformation of the middle tube when hitting the ball. In the development of high-performance badminton rackets and tennis rackets, world-renowned brands hope to make breakthroughs in production technology and structural design in order to lead the market.

[0003] Take a badminton racket as an example. A badminton racket is generally composed of a racket frame, a handle, and a middle tube connecting the racket frame and the handle. The length of a badminton racket does not exceed 68 cm, of which the length of the handle and the middle tube does not exceed 42 cm, the racket frame does not exceed 25 cm, and the width is 20 cm. With the development of science and technology, the development of rackets is moving towards lighter weight, harder rackets, better middle tube elasticity, and smaller air resistance.

[0004] In the prior art, the racket frame, middle tube and handle of a racket are generally composed of an inner layer and an outer layer, wherein the inner layer is a foam material, and the outer layer is wrapped around the inner layer, and the outer layer is a fiber material. The structural strength of the center of the racket with this structure is relatively weak and is easy to break, which is not conducive to enhancing the hitting force. Therefore, it is necessary to study a solution to solve the above problem. Summary of the invention

[0005] In view of this, the present invention aims at addressing the deficiencies in the prior art, and its main purpose is to provide a method for manufacturing a racket with built-in 3D printed parts, which can effectively solve the problem of relatively weak central structural strength of existing rackets.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A method for manufacturing a racket with a built-in 3D printed part comprises the following steps:

[0008] (1) Producing 3D printed parts by 3D printing;

[0009] (2) Laying a filling layer on the outer side and / or inner hollow cavity of the 3D printed part, which can be extruded or foamed to fill the internal gap of the 3D printed part, thereby forming a core;

[0010] (3) placing the core in a fiber outer layer that has been heated and cured or not heated and cured;

[0011] (4) The filling layer is extruded or foamed to fill the internal gaps of the 3D printed part, so that the 3D printed part, the filling layer and the fiber outer layer are combined together to obtain a finished racket.

[0012] As a preferred solution, the finished racket includes a racket frame, a middle tube and a handle; the front end of the middle tube is fixedly connected to the rear end of the racket frame, and the front end of the handle is fixedly connected to the rear end of the middle tube; the 3D printed part is built into at least a part of the racket frame, the middle tube or the handle.

[0013] As a preferred solution, the filling layer is made of foam material.

[0014] As a preferred solution, the 3D printed part is a metal, plastic or resin 3D printed part.

[0015] As a preferred solution, the 3D printed part is a multi-dimensional angle structural part, which has a plurality of support rods inside to form a multi-angle support structure, and the aforementioned internal gaps are formed between the support rods.

[0016] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0017] By setting up a 3D printed part and adopting an extrusion or foaming method to fill the material of the filling layer into the internal gap of the 3D printed part, the 3D printed part, the filling layer and the fiber outer layer are combined together to form a structure similar to reinforced concrete. The 3D printed part is equivalent to the steel frame structure in reinforced concrete, which can effectively enhance the structural strength of the center of the racket and prevent the racket from breaking easily. At the same time, according to the different directions of the resistance force required by the racket, the corresponding support angle structure can be pre-designed on the 3D printed part, which is conducive to enhancing the hitting force and improving the performance of the product.

[0018] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a perspective view of a first preferred embodiment of the present invention;

[0020] Figure 2 yes Figure 1 The AA direction is the cross-sectional view before forming;

[0021] Figure 3 yes Figure 1 The AA direction is the cross-sectional view after forming;

[0022] Figure 4 is a cross-sectional view of the second preferred embodiment of the present invention before molding;

[0023] Figure 5 It is a cross-sectional view of the third preferred embodiment of the present invention before molding.

[0024] Description of the accompanying drawings:

[0025] 10. Finished racket 11. 3D printed parts

[0026] 111, support rod 112, internal gap

[0027] 113, hollow cavity 12, filling layer

[0028] 13. Fiber outer layer 101. Frame

[0029] 102. Middle tube 103. Handle. DETAILED DESCRIPTION

[0030] Please refer to Figures 1 to 3 As shown, it shows the specific structure of the first preferred embodiment of the present invention. The first preferred embodiment of the present invention discloses a method for manufacturing a racket with a built-in 3D printed part, including the following steps:

[0031] (1) A 3D printed part 11 is manufactured by 3D printing. In this embodiment, the 3D printed part 11 is a metal, plastic or resin 3D printed part, etc. The metal material can be, for example, titanium metal, etc., but is not limited thereto. Also, the 3D printed part 11 is a multi-dimensional angle structural part, which has a plurality of support rods 111 inside to form a multi-angle support structure, and internal gaps 112 are formed between the support rods 111. The structure is simple and the support strength is good. The direction and number of the support angles of the support rods 111 can be designed according to the racket's need to resist forces in different directions.

[0032] (2) A filling layer 12 is laid on the outside of the 3D printed part 11, which can be squeezed or foamed to fill the internal gap 112 of the 3D printed part 11, so as to form a core. In this embodiment, the filling layer 12 is a foaming material, which can be more easily filled into the internal gap 112 of the 3D printed part 11.

[0033] (3) The core is placed in a heat-cured or unheat-cured fiber outer layer 13. In this embodiment, the fiber outer layer 13 is carbon fiber or glass fiber, but is not limited thereto.

[0034] (4) The filling layer 12 is squeezed or foamed to fill the internal gaps 112 of the 3D printed part 11, so that the 3D printed part 11, the filling layer 12 and the fiber outer layer 13 are combined together to obtain the finished racket 10. When the extrusion method is adopted, the air bag can be inflated for extrusion; when the foaming method is adopted, the filling layer 12 is made of foaming material. After the core body and the fiber outer layer 13 are combined to form a semi-finished product, the semi-finished product is placed in a mold for heating. During the heating process, the filling layer 12 is heated and expands to fill the internal gaps 112 of the 3D printed part 11 tightly. If the fiber outer layer 13 that has not been heated and cured is used, the fiber outer layer 13 will also be cured and formed after being heated for a period of time, so that the 3D printed part 11, the filling layer 12 and the fiber outer layer 13 are firmly combined and formed together (such as Figure 3 shown).

[0035] Furthermore, the finished racket 10 includes a racket frame 101, a middle tube 102 and a handle 103; the front end of the middle tube 102 is fixedly connected to the rear end of the racket frame 101, and the front end of the handle 103 is fixedly connected to the rear end of the middle tube 102; the 3D printed part 11 is built into at least a partial position of the racket frame 101, the middle tube 102 or the handle 103 to locally enhance the finished racket 10.

[0036] Please refer to Figure 4 As shown, it shows the specific structure of the second preferred embodiment of the present invention. The specific structure in this embodiment is basically the same as the specific structure of the first preferred embodiment mentioned above, and the difference is that:

[0037] In this embodiment, the outer peripheral side of the 3D printed part 11 contacts the inner wall of the fiber outer layer 13, and the inner center of the 3D printed part 11 has a hollow cavity 113, in which a filling layer 12 is arranged, and the filling layer 12 diffuses from the inside to the outside to fill the internal gap 112 of the 3D printed part 11 densely.

[0038] Please refer to Figure 5 As shown, it shows the specific structure of the third preferred embodiment of the present invention. The specific structure in this embodiment is basically the same as the specific structure of the first preferred embodiment mentioned above, and the difference is that:

[0039] In this embodiment, the inner center of the 3D printed part 11 has a hollow cavity 113, and a filling layer 12 that can be squeezed or foamed to fill the internal gap 112 of the 3D printed part 11 is laid in the hollow cavity 113 and on the outside of the 3D printed part 11, wherein the filling layer 12 located in the hollow cavity 113 diffuses from the inside to the outside to fill the internal gap 112 of the 3D printed part 11 densely, and the filling layer 12 located on the outside of the 3D printed part 11 diffuses from the outside to the inside to fill the internal gap 112 of the 3D printed part 11 densely, so as to achieve a better filling effect, a denser filling, and a better structural strength.

[0040] The design focus of the present invention is: by setting a 3D printed part, and cooperating with the use of extrusion or foaming to fill the material of the filling layer into the internal gap of the 3D printed part, the 3D printed part, the filling layer and the fiber outer layer are combined together to form a structure similar to reinforced concrete. The 3D printed part is equivalent to the steel frame structure in reinforced concrete, which can effectively enhance the structural strength of the center of the racket and prevent the racket from breaking easily. At the same time, according to the different directions of the resistance force required by the racket, the corresponding support angle structure can be pre-designed on the 3D printed part, which is conducive to enhancing the hitting force and improving the product's performance.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for manufacturing a racket with a built-in 3D printed part, characterized in that: The following steps are included: (1) Producing 3D printed parts by 3D printing; (2) Laying a filling layer on the outer side and / or inner hollow cavity of the 3D printed part, which can be extruded or foamed to fill the internal gap of the 3D printed part, thereby forming a core; (3) placing the core in a fiber outer layer that has been heated and cured or not heated and cured; (4) The filling layer is extruded or foamed to fill the internal gaps of the 3D printed part, so that the 3D printed part, the filling layer and the fiber outer layer are combined together to obtain a finished racket.

2. The method for manufacturing a racket with a built-in 3D printed part according to claim 1, characterized in that: The finished racket comprises a racket frame, a middle tube and a handle; the front end of the middle tube is fixedly connected to the rear end of the racket frame, and the front end of the handle is fixedly connected to the rear end of the middle tube; the 3D printed part is built into at least a part of the racket frame, the middle tube or the handle.

3. The method for manufacturing a racket with a built-in 3D printed part according to claim 1, characterized in that: The filling layer is made of foaming material.

4. The method for manufacturing a racket with a built-in 3D printed part according to claim 1, characterized in that: The 3D printed part is a metal, plastic or resin 3D printed part.

5. The method for manufacturing a racket with a built-in 3D printed part according to claim 1, characterized in that: The 3D printed part is a multi-dimensional angle structural part, which has a plurality of support rods inside to form a multi-angle support structure, and the aforementioned internal gaps are formed between the support rods.

Images