Preparation method of alumina-carbon bat

Abstract

The invention relates to an aluminum-carbon bat manufacturing method, which comprises the following steps of: preparing a frame piece, a carbon fiber blank pre-impregnated with thermosetting resin and a directionally stretched polypropylene film, filling the carbon fiber blank into the groove, and carrying out heat treatment on the carbon fiber blank and the directionally stretched polypropylene film to obtain the aluminum-carbon bat. The preparation method comprises the following steps: preparing a frame piece filled with a carbon fiber blank material, winding a directionally stretched polypropylene film on the outer surface of the frame piece filled with the carbon fiber blank material to form a racket frame blank body, and finally heating the racket frame blank body, so that the carbon fiber blank material in the racket frame blank body is heated and cured and is fixedly connected with the frame piece into a whole, thereby obtaining the racket frame with the aluminum-carbon composite structure.

Description

Technical Field

[0001] The present invention relates to a racket, and particularly to a method for manufacturing an aluminum-carbon racket. Background Art

[0002] There is a racket frame made of metal (such as aluminum alloy). Since the aluminum alloy material is relatively soft, the structural strength of the racket frame is low. Therefore, when the racket frame is manufactured and strung, the racket frame is prone to deformation. In addition, if a certain structural strength is to be achieved, the thickness of the racket frame must be greater than a predetermined value, but this will increase the weight of the racket frame. Therefore, the existing racket frames cannot fully meet the needs of consumers. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for manufacturing an aluminum-carbon racket that can solve the problems of existing racket frames.

[0004] The method for manufacturing an aluminum-carbon racket of the present invention includes the following steps: (A) Prepare a frame member, a carbon fiber blank pre-impregnated with a thermosetting resin, and a unidirectional stretched polypropylene film. The frame member is made by aluminum extrusion molding, surrounds an axis and defines a racket face space. The frame member includes an inner surface defining a hollow portion, an outer surface opposite to the inner surface, and several rib plates disposed in the hollow portion. The outer surface has at least one groove surrounding the axis. (B) Place the carbon fiber blank in the groove. (C) Wind the unidirectional stretched polypropylene film around the outer surface of the frame member filled with the carbon fiber blank to form a racket frame blank. (D) Heat the racket frame blank, and the carbon fiber blank in the racket frame blank is cured by heat and consolidated with the frame member into one body.

[0005] In the method for manufacturing an aluminum-carbon racket of the present invention, the outer surface of the frame member prepared in step (A) has an inner face adjacent to the racket face space, an outer face opposite to the inner face, and two side faces connecting between the inner face and the outer face. The side faces are spaced and oppositely arranged along the transverse axis. The groove is disposed on the inner face. The width of the groove corresponding to the transverse axis is between 1 and 10 mm, and the depth-width ratio of the groove perpendicular to the transverse axis is between 0.5 and 1.2 mm.

[0006] In the method for manufacturing an aluminum-carbon racket of the present invention, the width of the groove of the frame member prepared in step (A) corresponding to the transverse axis is between 1 and 4 mm, and the depth-width ratio of the groove perpendicular to the transverse axis is between 0.6 and 1.0 mm.

[0007] In the aluminum-carbon racket making method described in the present invention, the outer surface of the frame prepared in the step (A) has an inner surface portion adjacent to the racket surface space, an outer surface portion opposite to the inner surface portion, and two side surfaces connected between the inner surface portion and the outer surface portion, the inner surface portion and the outer surface portion are radially spaced and arranged in opposite directions, and there are two grooves, which are respectively arranged on the side surfaces.

[0008] In the aluminum-carbon pattering method of the present invention, the width of each groove of the frame prepared in step (A) is between 1 and 10 mm corresponding to the radial direction, and the depth of each groove perpendicular to the radial direction is between 0.5 and 1.2 mm.

[0009] In the aluminum-carbon patting method of the present invention, the width of the frame prepared in step (A) is between 1 and 4 mm, and the depth of each groove is between 0.6 and 1.0 mm.

[0010] In the aluminum-carbon preparation method of the present invention, based on the total content of thermosetting resin as 100wt%, the solvent content of the pre-impregnated thermosetting resin of the carbon fiber blank prepared in step (A) is less than 10wt%, wherein the thermosetting resin is an epoxy resin-based material.

[0011] In the aluminum-carbon film making method of the present invention, the oriented stretched polypropylene film prepared in step (A) has a release side, and the release side of the oriented stretched polypropylene film in step (C) faces the outer surface and the carbon fiber blank.

[0012] The beneficial effects of the present invention are as follows: by integrating the carbon fiber blank with the frame, the structural strength of the racket frame can be improved without increasing the weight, and the overall steps are simple, the manufacturing is easy, and the production cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a flow block diagram of the first embodiment of the aluminum carbon patting method of the present invention;

[0014] Figure 2 is an incomplete planar assembly diagram of the first embodiment;

[0015] Figure 3 is an incomplete exploded perspective view of the first embodiment;

[0016] Figure 4 is along Figure 2 The cross-sectional view taken along the straight line IV-IV in FIG.

[0017] Figure 5 is a schematic diagram of the formation of a frame member of the first embodiment;

[0018] Figure 6It is an incomplete cross-sectional view of the second embodiment of the aluminum-carbon patting method of the present invention. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0020] Before the present invention is described in detail, it should be noted that similar components are denoted by the same reference numerals in the following description.

[0021] See also Figure 1 The first embodiment of the aluminum carbon patting method of the present invention comprises the following steps:

[0022] Step 1: Read with reference Figure 2 and Figure 3 , prepare a frame 10, a carbon fiber blank 20 pre-impregnated with thermosetting resin, and an oriented polypropylene (OPP) film 30. The frame 10 is made of a high-strength aluminum alloy with a thickness of 0.6 mm by aluminum extrusion molding, and is then processed into a ring frame shape after aluminum extrusion molding, and a racket face space 101 is defined around an axis L. Then, with the steps of Figure 4 The frame 10 includes an inner surface 12 defining a hollow portion 11, an outer surface 13 opposite to the inner surface 12, a groove 14 disposed on the outer surface 13 and surrounding the axis L, and a plurality of ribs 15 disposed on the hollow portion 11. The outer surface 13 has an inner portion 131 adjacent to the racket space 101, an outer portion 132 opposite to the inner portion 131, and two side portions 133 connected between the inner portion 131 and the outer portion 132. The inner portion 131 and the outer portion 132 are spaced apart and disposed in opposite directions along a radial direction X, and the ribs 15 are transversely disposed between the inner portion 131 and the outer portion 132 along the radial direction X. The side portions 133 are spaced apart and disposed in opposite directions along a transverse axis Y parallel to the axis L and perpendicular to the radial direction X. A wire avoidance groove 134 is recessed in the outer portion 132. The groove 14 of this embodiment is disposed on the inner surface 131, and a width W of the groove 14 corresponding to the transverse axis Y may be between 1 and 10 mm (the width W of the groove 14 of this embodiment corresponding to the transverse axis Y is between 1 and 4 mm), and a depth H of the groove 14 perpendicular to the transverse axis Y may be between 0.5 and 1.2 mm (0.6 to 1.0 mm in this embodiment). Taking the total content of the thermosetting resin as 100 wt%, the solvent content of the thermosetting resin pre-impregnated in the carbon fiber blank 20 is less than 10 wt%, and the thermosetting resin is an epoxy resin-based material. The oriented stretched polypropylene film 30 has a release side 31, and the release side 31 has a release effect.

[0023] For example Figure 5 As shown, the manufacturing of the frame 10 includes the following steps:

[0024] Step (a): A long tubular embryonic piece 1 is formed by aluminum extrusion, and the embryonic piece 1 includes an inner surface 12' defining a hollow portion 11', an outer surface 13' opposite to the inner surface 12', a groove 14' disposed on the outer surface 13', and a plurality of ribs 15' disposed on the hollow portion 11'. The outer surface 13' has an inner surface 131', an outer surface 132' opposite to the inner surface 131', and two side surfaces 133' connected between the inner surface 131' and the outer surface 132'. The groove 14' is disposed on the inner surface 131'.

[0025] Step (b): rolling a wire avoiding groove 134' on the outer portion 132'.

[0026] Step (c): cutting the embryo 1 into a predetermined length L1.

[0027] Step (d): The embryonic piece 1 having a predetermined length is shaped into a hollow ring-shaped frame piece 10 by a frame mold (not shown).

[0028] Step 2: Fill the carbon fiber blank 20 into the groove 14 of the frame 10 .

[0029] Step 3: Wrap the oriented stretched polypropylene film 30 in a radial direction X around the outer surface 13 of the frame 10 filled with the carbon fiber blank 20, and make the release side surface 31 face the outer surface 13 and the carbon fiber blank 20, and form a racket frame blank 100'. Step 4: Heat the racket frame blank 100', and the carbon fiber blank 20 in the racket frame blank 100' is cured by heat and consolidated with the frame 10, so that a racket frame 100 with an aluminum-carbon composite structure can be manufactured.

[0030] Step 5: Drill the frame 100 along the radial direction X, and form a plurality of threading holes 40 (such as the threading holes 40) on the frame 100 that connect the inner surface 131, the outer surface 132 and the carbon fiber blank 20. Figure 4 The wire-avoiding groove 134' of step (b) is formed with a wire-avoiding groove 134 on the outer portion 132 of step five.

[0031] The racket frame 100 manufactured by the above-mentioned continuous steps has the following advantages:

[0032] First, by providing a racket frame 100 composed of a carbon fiber blank 20 with low density and good mechanical strength and an aluminum extruded frame 10, not only the overall weight can be reduced, but also the effect of high structural strength can be achieved.

[0033] Second, the width W of the groove 14 corresponding to the transverse axis Y may be between 1 and 10 mm (the width W of the groove 14 corresponding to the transverse axis Y in this embodiment is between 1 and 4 mm), and the depth H of the groove 14 perpendicular to the transverse axis Y may be between 0.5 and 1.2 mm (0.6 to 1.0 mm in this embodiment). The width and depth of the groove 14 of the frame 10 are controlled to help increase the filling and bonding properties of the carbon fiber blank 20 and the frame 10. However, the width W of the groove 14 corresponding to the transverse axis Y is not limited thereto.

[0034] Third, by wrapping the oriented stretched polypropylene film 30 in the radial direction X on the outer surface 13 of the frame 10 filled with the carbon fiber blank 20, the oriented stretched polypropylene film 30 can fix and pressurize the carbon fiber blank 20, thereby avoiding the situation where the surface of the frame 10 is damaged by pressurizing the metal mold. In addition, by making the release side surface 31 of the oriented stretched polypropylene film 30 have a release effect, the oriented stretched polypropylene film 30 and the carbon fiber blank 20 can be prevented from sticking.

[0035] It is worth mentioning that the solvent content of the thermosetting resin pre-impregnated with the carbon fiber blank 20 of the present invention is less than 10wt%. Reducing the solvent content helps to reduce the amount of volatile gas emitted during heating and curing.

[0036] See also Figure 6 The second embodiment of the aluminum-carbon fiber manufacturing method of the present invention is different from the first embodiment in that: the number of grooves 14 of the frame 10 prepared in step 1 is two, and the grooves 14 are respectively arranged on the side surface 133. The width W of each groove 14 corresponding to the radial direction X can be between 1 and 10 mm (the width W of the groove 14 of the second embodiment corresponding to the radial direction X is between 1 and 4 mm), and the depth H of each groove 14 perpendicular to the radial direction X can be between 0.5 and 1.2 mm (the depth of the second embodiment is 0.6 to 1.0 mm). In step 2, two carbon fiber blanks 20 are respectively filled in the grooves 14. The continuous steps of the second embodiment can also achieve the same purpose and effect as the first embodiment.

[0037] The second embodiment of the aluminum-carbon racket manufacturing method of the present invention adopts the bending test of Section 10.4 of the Taiwan Standard CNS11610-1991. After the frame 10 made of a 0.6mm thick and high-strength aluminum alloy is integrally assembled with the carbon fiber blank 20, the deformation amount can be measured to be 8.4mm under a force of 50Kg. Compared with the existing racket frame made of a 0.6mm thick and high-strength aluminum alloy, the deformation amount is 8.9mm. The present invention has the actual effect of strengthening the structure.

[0038] In summary, the aluminum-carbon manufacturing method of the present invention has simple overall manufacturing steps, is easy to manufacture, and can achieve the purpose of structural strengthening, and can indeed achieve the purpose of the present invention.

Claims

1. A method for preparing aluminum carbon. Features: It includes the following steps: (A) preparing a frame, a carbon fiber blank pre-impregnated with a thermosetting resin, and an oriented stretched polypropylene film, wherein the frame is made of aluminum extrusion and surrounds an axis and defines a racket surface space, wherein the frame includes an inner surface defining a hollow portion, an outer surface opposite to the inner surface, and a plurality of ribs disposed in the hollow portion, and the outer surface has at least one groove surrounding the axis; (B) placing the carbon fiber blank in the groove; (C) wrapping the oriented stretched polypropylene film around the outer surface of the frame member filled with the carbon fiber blank to form a frame blank; (D) heating the racket frame embryo, so that the carbon fiber embryo material in the racket frame embryo is cured by heat and is fixed to the frame member as a whole.

2. The aluminum-carbon patting method according to claim 1, Features: The outer surface of the frame prepared in step (A) comprises an inner surface portion adjacent to the racket surface space, an outer surface portion opposite to the inner surface portion, and two side surfaces connected between the inner surface portion and the outer surface portion, wherein the side surfaces are spaced apart and arranged in opposite directions along the transverse axis, and the groove is arranged on the inner surface portion, wherein the width of the groove corresponding to the transverse axis is between 1 and 10 mm, and the depth and width of the groove perpendicular to the transverse axis is between 0.5 and 1.2 mm.

3. The aluminum-carbon patting method according to claim 2, Features: The width of the groove of the frame prepared in step (A) is between 1 and 4 mm corresponding to the transverse axis, and the depth and width of the groove perpendicular to the transverse axis are between 0.6 and 1.0 mm.

4. The aluminum-carbon patting method according to claim 1, Features: The outer surface of the frame prepared in step (A) comprises an inner surface portion adjacent to the racket surface space, an outer surface portion opposite to the inner surface portion, and two side surfaces connected between the inner surface portion and the outer surface portion, wherein the inner surface portion and the outer surface portion are radially spaced and arranged in opposite directions, and there are two grooves, which are respectively arranged on the side surfaces.

5. The aluminum-carbon patting method according to claim 4, Features: The width of each groove of the frame prepared in step (A) is between 1 and 10 mm corresponding to the radial direction, and the depth of each groove perpendicular to the radial direction is between 0.5 and 1.2 mm.

6. The aluminum-carbon patting method according to claim 5, Features: The width of the frame prepared in step (A) is between 1 and 4 mm, and the depth of each groove is between 0.6 and 1.0 mm.

7. The aluminum-carbon patting method according to claim 1, Features: Based on the total content of the thermosetting resin being 100wt%, the solvent content of the pre-impregnated thermosetting resin of the carbon fiber blank prepared in step (A) is less than 10wt%, wherein the thermosetting resin is an epoxy resin-based material.

8. The aluminum-carbon patting method according to claim 1, Features: The oriented stretched polypropylene film prepared in the step (A) has a release side, and the release side of the oriented stretched polypropylene film in the step (C) faces the outer surface and the carbon fiber blank.

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