Forming method of rod head cover plate

Abstract

The invention relates to a rod head cover sheet forming method, which is used for solving the problem that two conventional thermoplastic materials are easy to wrinkle when being pressed. Comprising the following steps: carrying out hot pressing on a first thermoplastic material for 3-5 minutes at 200-400 DEG C and applying force of 15-25 tons through a mold; overlapping a second thermoplastic material with the hot-pressed first thermoplastic material; and carrying out hot pressing on the first thermoplastic material and the second thermoplastic material which are overlapped for 6-8 minutes at 200-400 DEG C and 25-35 tons of applying force through the mold. Therefore, the effect of better forming quality can be achieved.

Description

Technical Field

[0001] The invention relates to a club head cover sheet forming method, in particular to a club head cover sheet forming method for forming a double-layer cover sheet in two steps. Background Art

[0002] Generally speaking, in order to meet the requirement of lightweight, a golf club head is first formed into a hollow ball head, and then a cover sheet is installed on the crown of the ball head. The cover sheet is made of thermoplastic material, such as carbon fiber, so as to achieve the effect of reducing the overall weight of the golf club head. In order to make the cover sheet have better strength, it is usually made of two layers of thermoplastic material. Specifically, the two layers of thermoplastic material are superimposed and placed in a mold for hot pressing, so that the two layers of thermoplastic material are pressed into a cover sheet with a predetermined shape. However, when the two layers of thermoplastic material are superimposed and hot pressed at the same time, that is, when one of the thermoplastic materials is subjected to the molding pressure of the mold, it will also be subjected to the stress of deformation and extrusion of the adjacent thermoplastic material, resulting in different stresses on each thermoplastic material, so it is easy to produce wrinkles, resulting in poor appearance of the cover sheet.

[0003] In view of this, the existing club head cover forming method still needs to be improved. Summary of the invention

[0004] To solve the above problems, the present invention aims to provide a method for forming a club head cover sheet, which can have better appearance quality.

[0005] The directions or their approximate terms described throughout the present invention, such as "front", "rear", "left", "right", "upper (top)", "lower (bottom)", "inside", "outside", "side", etc., mainly refer to the directions of the attached drawings, and each direction or its approximate terms are only used to assist in the explanation and understanding of the embodiments of the present invention, and are not used to limit the present invention.

[0006] The elements and components described throughout the present invention use the quantifiers "a" or "an" only for convenience of use and to provide a general meaning of the scope of the present invention; in the present invention, they should be interpreted as including one or at least one, and a single concept also includes multiple situations, unless it is obvious that it means otherwise.

[0007] The similar terms such as "combination", "assembly" or "assembly" described in the whole text of the present invention mainly include the connection that can be separated without damaging the components, or the connection that makes the components inseparable. Those skilled in the art can choose according to the materials of the components to be connected or the assembly requirements.

[0008] The club head cover forming method of the present invention comprises: hot pressing a first thermoplastic material for 3 to 5 minutes at 200 to 400° C. and an applied force of 15 to 25 tons through a mold; overlapping a second thermoplastic material with the hot-pressed first thermoplastic material; and hot pressing the overlapped first thermoplastic material and the second thermoplastic material for 6 to 8 minutes at 200 to 400° C. and an applied force of 25 to 35 tons through the mold.

[0009] Therefore, the club head cover forming method of the present invention, by firstly performing hot compression molding on the first thermoplastic material, then superimposing the molded first thermoplastic material with the second thermoplastic material, and then performing hot compression molding on the second thermoplastic material, can make the first thermoplastic material and the second thermoplastic material be separately molded by force without being affected by each other's deformation and extrusion stress, can avoid the generation of wrinkles, and has the effect of achieving better molding quality.

[0010] The first thermoplastic material includes polyamide, thermoplastic polyamide, polycarbonate or polystyrene. Thus, the polymer materials can form a better structural strength effect together with the plurality of fibers.

[0011] The second thermoplastic material includes polyamide, thermoplastic polyamide, polycarbonate or polystyrene. Thus, the polymer materials can form a better structural strength effect together with the plurality of fibers.

[0012] The mold has an upper mold cavity and a lower mold cavity, the upper mold cavity has an arc-shaped convex portion, and the lower mold cavity has a corresponding arc-shaped concave portion. After the mold performs hot pressing on the first thermoplastic material, the first thermoplastic material has a convex arc surface and a concave arc surface that are opposite to each other, and the second thermoplastic material is superimposed on the convex arc surface of the first thermoplastic material. In this way, the second thermoplastic material can function as the appearance layer of the club head cover.

[0013] The first thermoplastic material includes a plurality of carbon fibers extending in one direction, so that the first thermoplastic material has the properties of high strength and light weight.

[0014] The second thermoplastic material includes a plurality of carbon fibers woven in two interlaced directions. Thus, when the second thermoplastic material is used as the appearance layer of the club head cover, it has a better appearance.

[0015] The mold and the first thermoplastic material are preheated to 200-400° C. respectively before hot pressing the first thermoplastic material. In this way, the efficiency of hot pressing the first thermoplastic material can be improved.

[0016] The first thermoplastic material and the second thermoplastic material are made of the same material, so that they can have a better bonding effect.

[0017] The mold is heated by infrared rays, so that the temperature can be increased quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 : A schematic diagram of hot pressing a first thermoplastic material in a preferred embodiment of the present invention; Figure 2 : An action diagram of hot pressing a first thermoplastic material in a preferred embodiment of the present invention; Figure 3 : A schematic diagram of a preferred embodiment of the present invention wherein the second thermoplastic material is superimposed on the first thermoplastic material after heat pressing; Figure 4 : An action diagram of hot pressing a first thermoplastic material and a second thermoplastic material in a preferred embodiment of the present invention.

[0019] Description of reference numerals: 1: Mould 1a: Upper mold 1b: Lower mold 11: Upper mold cavity 12:Lower mold cavity 2: First thermoplastic material 21:convex arc surface 22: Concave arc surface 3: Second thermoplastic material. DETAILED DESCRIPTION

[0020] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the preferred embodiments of the present invention are specifically cited below and described in detail with reference to the accompanying drawings; in addition, those marked with the same symbols in different drawings are regarded as the same and their descriptions are omitted.

[0021] Please refer to Figure 1 , Figure 3 As shown, it is a preferred embodiment of the club head cover forming method of the present invention, including hot pressing a first thermoplastic material 2 with a mold 1, and hot pressing the first thermoplastic material 2 and the second thermoplastic material 3 with the mold 1 after overlapping the first thermoplastic material 2 and the second thermoplastic material 3.

[0022] The mold 1 has a mold cavity, and the mold cavity has a corresponding predetermined cover plate shape. The mold 1 can be formed by a top mold 1a and a bottom mold 1b. The top mold 1a has an top mold cavity 11, and the bottom mold 1b has a bottom mold cavity 12. For example, the top mold cavity 11 can have an arc-shaped convex portion, and the bottom mold cavity 12 can have a corresponding arc-shaped concave portion. In this way, the top mold 1a and the bottom mold 1b can hot-press the first thermoplastic material 2 into an arc-shaped cover plate semi-finished product.

[0023] The material of the first thermoplastic material 2 may be a thermoplastic resin impregnated with a plurality of carbon fibers, and the plurality of carbon fibers may be unidirectionally extending. The thermoplastic resin may be polyamide (PA), thermoplastic polyurethane (TPU), polycarbonate (PC) or polystyrene (PS). In addition, the first thermoplastic material 2 may have a predetermined shape and size that roughly conforms to the club head cover. For example, the first thermoplastic material 2 may be punched in advance to form a predetermined shape and predetermined size, which is not limited by the present invention.

[0024] Please refer to Figure 2 As shown, the mold 1 performs hot pressing on the first thermoplastic material 2 at 200-400°C and an applied force of 15-25 tons for 3-5 minutes, so that the first thermoplastic material 2 is molded into the semi-finished cover sheet. The mold 1 and the first thermoplastic material 2 can be pre-heated to 200-400°C respectively, and then the mold 1 is used to hot press the first thermoplastic material 2, so that the hot pressing molding efficiency of the first thermoplastic material 2 can be improved. Preferably, the mold 1 can be heated and heated by infrared rays. After the first thermoplastic material 2 is molded by the arc-shaped convex portion of the upper mold cavity 11 of the mold 1 and the arc-shaped concave portion of the lower mold cavity 12, the first thermoplastic material 2 can be arc-shaped, so that the first thermoplastic material 2 has a convex arc surface 21 and a concave arc surface 22, and the convex arc surface 21 is opposite to the concave arc surface 22.

[0025] Please refer to Figure 3As shown, the material of the second thermoplastic material 3 can be a thermoplastic resin impregnated with a plurality of carbon fibers. The thermoplastic resin can be polyamide (PA), thermoplastic polyurethane (TPU), polycarbonate (PC) or polystyrene (PS). In addition, the second thermoplastic material 3 can have a predetermined shape and size that roughly conforms to the club head cover. For example, the second thermoplastic material 3 can be punched in advance to form a predetermined shape and a predetermined size, which is not limited by the present invention. The second thermoplastic material 3 is overlapped with the first thermoplastic material 2 after molding. It is worth noting that the second thermoplastic material 3 is overlapped on the convex arc surface 21 of the first thermoplastic material 2, so that the second thermoplastic material 3 can be used as the appearance layer of the club head cover. Furthermore, the plurality of carbon fibers of the second thermoplastic material 3 can have two extending directions, so that the plurality of carbon fibers are in a staggered woven state to have a better appearance.

[0026] Please refer to Figure 4 As shown, the mold 1 is also used to heat press the superimposed first thermoplastic material 2 and the second thermoplastic material 3 at 200-400°C and an applied force of 25-35 tons for 6-8 minutes to form a semi-finished cover sheet. In addition, the mold 1 can be heated and heated by infrared rays. Preferably, the second thermoplastic material 3 can be pre-heated to 200-400°C, and then overlapped with the first thermoplastic material 2 at a temperature of 200-400°C, and the first thermoplastic material 2 and the second thermoplastic material 3 are heat-pressed by the mold 1, so that the efficiency of hot pressing molding can be improved. After the semi-finished cover sheet is cooled and demolded, subsequent processing such as trimming and grinding can be continued to form a club head cover sheet.

[0027] In summary, the club head cover forming method of the present invention, by first performing hot compression molding on the first thermoplastic material, then superimposing the molded first thermoplastic material with the second thermoplastic material, and then hot compression molding the second thermoplastic material, can make the first thermoplastic material and the second thermoplastic material be separately molded by force without being affected by each other's deformation and extrusion stress, can avoid the generation of wrinkles, and has the effect of achieving better molding quality.

[0028] Although the present invention has been disclosed using the above-mentioned preferred embodiments, they are not intended to limit the present invention. Any person skilled in the art may make various changes and modifications to the above-mentioned embodiments without departing from the spirit and scope of the present invention. These changes and modifications still fall within the technical scope protected by the present invention. Therefore, the protection scope of the present invention shall include all changes within the meaning and equivalent scope of the appended claims.

Claims

1. A method for forming a club head cover, characterized in that: include: Hot pressing a first thermoplastic material through a mold at 200 to 400° C. and an applied force of 15 to 25 tons for 3 to 5 minutes; Laminating a second thermoplastic material with the heat-pressed first thermoplastic material; and The first thermoplastic material and the second thermoplastic material overlapped are hot pressed for 6 to 8 minutes at 200 to 400° C. and a force of 25 to 35 tons through the mold.

2. The method for forming a club head cover sheet according to claim 1, wherein: The first thermoplastic material and the second thermoplastic material include the same material.

3. The method for forming a club head cover sheet according to claim 2, wherein: The first thermoplastic material is made of polyamide, thermoplastic polyurethane, polycarbonate or polystyrene.

4. The method for forming a club head cover sheet according to claim 2, wherein: The second thermoplastic material is made of polyamide, thermoplastic polyurethane, polycarbonate or polystyrene.

5. The method for forming a club head cover sheet according to claim 1, wherein: The mold has an upper mold cavity and a lower mold cavity, the upper mold cavity has an arc-shaped convex portion, and the lower mold cavity has a corresponding arc-shaped concave portion. After the mold performs hot pressing on the first thermoplastic material, the first thermoplastic material has a convex arc surface and a concave arc surface that are opposite to each other, and the second thermoplastic material is superimposed on the convex arc surface of the first thermoplastic material.

6. The method for forming a club head cover sheet according to claim 5, wherein: The first thermoplastic material includes a plurality of carbon fibers extending in a unidirectional direction.

7. The method for forming a club head cover sheet according to claim 5, wherein: The second thermoplastic material includes a plurality of carbon fibers woven in an alternating manner in two extending directions.

8. The method for forming a club head cover sheet according to claim 1, wherein: The mold and the first thermoplastic material are preheated to 200-400° C. respectively and then the first thermoplastic material is hot pressed.

9. The method for forming a club head cover sheet according to claim 8, wherein: The first thermoplastic material is preheated by infrared rays.

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