JP2005028013A - Surface treatment method of metal head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface treatment method forming a clear and three-dimensional pattern such as a letter and a mark on the surface of a golf club head composed of a metal member at a low cost. <P>SOLUTION: This surface treatment method is so constituted that a masking sheet formed by punching out the pattern such as the letter and the mark is stuck to a body part of the golf club head on a surface smoothed by polishing work, the pattern part is made coarse by blasting a polishing agent by an air blast and coated with color clear so that the pattern is struck up three dimensionally. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a surface treatment technique for a golf club head made of a metal member.

  On the surface of a golf club head, characters for identifying the golf club are often displayed, and a mark is often displayed to make it easy to confirm the directionality at the time of addressing. As a specific method, for example, after polishing the head substrate, a base coating with a high shielding property is applied to the lower layer, and a clear coating for color suppression is applied to the surface layer, but between the two layers. A so-called transfer mark or a method of attaching a mark sticker has been performed. Affixing these transfer marks is generally done manually, which causes problems such as misalignment and missing characters.

  Also, a method of forming the above characters and marks by printing, a method of forming concave characters or concave marks on the substrate itself, and coloring with an enamel color paint before or after the upper clear paint. It is.

  On the other hand, a masking sheet having a die-cut portion is used to expose portions of characters and marks, and the exposed portion is blown with an abrasive by air blast to form a rough surface, and paint is applied to the roughened portion. The method of attaching is disclosed (for example, refer to Patent Document 1).

  According to the above method, in order to make the applied paint remain adhered, it is necessary to roughen the grain size of the rough surface and to make a recess dug down from the smooth surface. In particular, in order to form a recess by air blasting on the surface of a titanium alloy having high hardness, it is necessary to process for a long time with a high air pressure by using a coarse abrasive.

In addition, if processing is performed for a long time at such high air pressure, the boundary of the die-cut portion of the masking sheet used for shielding is damaged, and characters and marks are likely to become unclear and a high-quality finish cannot be obtained. There was a problem.
Real Kosho 60-8604

  The present invention has been proposed to solve the above-described problems, and a surface treatment for processing a clear and three-dimensional pattern such as letters and marks on the surface of a golf club head made of a metal member at a low cost. It is an object to provide a method.

  The present invention includes a step of forming a partial shielding film by a masking sheet on the surface of a golf club head made of a metal member, a step of patterning at least the partial shielding film by air blasting, and applying a color clear paint to the surface The above-mentioned problem is solved by providing a surface treatment method characterized by comprising the steps of: (Claim 1).

  Further, in the present invention, the abrasive used for the air blasting is, for example, carborundum or alundum having an average particle diameter of 100 to 500 μm, and the air pressure is 0.3 to 0.8 MPa. The above-mentioned problem is solved by providing a surface treatment method for a golf club head made of a metal member.

  Further, in the present invention, the color clear paint is a translucent paint which is colored, for example, by mixing a colorant into a urethane-based clear paint, for example. Surface treatment of a golf club head comprising a metal member according to claim 1 The above-mentioned problem is solved by providing a method (claim 3).

  Further, the present invention provides the surface treatment method for a golf club head made of a metal member according to any one of claims 1 to 3, further comprising a ground treatment step using at least one primer paint layer as a lower layer of the color clear paint film. By providing the above, the above-mentioned problem is solved (claim 4).

  Furthermore, the present invention provides a surface treatment method for a golf club head comprising a metal member according to any one of claims 1 to 4, wherein the film thickness of the coating film by the color clear coating is 10 to 30 µm. The problem is solved (claim 5).

  According to the first aspect of the present invention, various patterns such as letters and marks can be formed on a metal base of a golf club head made of a metal member, and these formed patterns are semi-transparent. By looking through the color clear layer, it is possible to easily obtain a three-dimensional appearance that floats on a smooth surface.

  According to the invention of claim 2, a golf club made of a metal member is sprayed by air blasting with an air pressure of 0.3 to 0.8 MPa, for example, carborundum or alundum having an average particle diameter of 100 to 500 μm. Patterns such as letters and marks can be freely formed on the surface of the head.

  According to the invention of claim 3, by applying a translucent color clear paint mixed with a colorant, the pattern of characters, marks, etc. formed on the substrate through the paint film floats on a smooth surface. And a three-dimensional appearance.

  According to the invention which concerns on Claim 4, it can be set as the color clear coating film excellent in adhesiveness by performing the surface treatment by a primer before the process of apply | coating said color clear coating material.

  According to the invention which concerns on Claim 5, the pattern of the character, the mark, etc. which were formed in the base which can be seen through a translucent coating film effectively floats by making the coating film of a color clear coating into thickness of 10-30 micrometers. The appearance can be seen.

  An example applied to a case where a rough surface pattern by air blasting is processed on a surface of a golf club head made of a metal member, and coating is applied to make the pattern appear three-dimensionally, with reference to the drawings. I will explain it.

  FIG. 1 is an enlarged cross-sectional view of a golf club head main body 1 made of a metal member in an embodiment of the surface treatment method according to the present invention. The surface of the head body 1 is smoothed by polishing, and the finish is made glossy or hairline finished, so that the contrast with the rough surface of the pattern such as letters and marks by air blasting in the later process is strong, and more It is effective.

  The masking sheet 2 affixed to the surface of the head main body 1 is a sheet in which a pattern such as a desired character or mark is cut out, and an adhesive layer 4 is provided on the back surface of the base 3 to It can be easily adhered to the surface. The base material 3 of the masking sheet is a soft urethane resin sheet having a thickness of around 0.5 mm, and the adhesive layer 4 is made of an acrylic adhesive, and is resistant to the impact of abrasives caused by blasting. It is high, has an excellent masking effect, has flexibility and is easy to apply.

  FIG. 2 shows a state in which an abrasive is sprayed onto the head body 1 to which the masking sheet 2 is adhered by air blasting. The portion not covered with the masking sheet 2 is roughened by the abrasive 6 sprayed from the nozzle 5 of the air blasting apparatus.

  In the present invention, in order to form a desired pattern such as characters and marks having a three-dimensional effect, the rough surface can be sufficiently formed if the roughness is in the range of 10 to 20 μm. It is not necessary to provide a recess enough to anchor the paint as disclosed in Japanese Patent No. 56-150189. The surface roughness can be adjusted to 10 to 20 μm by spraying alundum (alumina) having a particle size of 300 μm from a nozzle at a pneumatic pressure of 0.5 MPa for 15 seconds with a blast device.

  In addition to the above, the abrasive used for air blasting can also use carborundum (silicon), emery, glass beads, alumina, grit, wire cut, etc. with a particle size of 100 to 500 μm. Therefore, it is not necessary to grind deep enough to provide a recess in the surface of the head body, and the use of the above-mentioned alundum is most suitable.

FIG. 3 is a cross section of the head body from which the masking sheet 2 has been removed after the air blasting process, and the processed blast rough surface 7 is formed on the surface.

  The acrylic adhesive used for the masking sheet 2 has relatively good releasability and the adhesive hardly remains on the surface of the head main body. However, cleaning with a solvent and primer coating are required before painting the next process. By applying, the adhesion of the coating film can be ensured.

  FIG. 4 shows a cross section in a state in which the color clear 8 and the top coat clear 9 are applied to the surface of the head main body on which patterns such as letters and marks are formed by air blasting.

  The thicknesses of the color clear layer and the top coat clear are each preferably about 10 to 30 μm. If it is 10 μm or less, the three-dimensional effect of the pattern by air blasting cannot be obtained, and if it is 30 μm or more, the adhesion of the paint film is insufficient and there is a possibility of peeling. Therefore, a good result was obtained by adjusting the coloring degree of the color clear so that the blast pattern can be effectively seen three-dimensionally with a film thickness of about 20 μm.

  This color clear paint is made of polyurethane resin based clear paint, mixed with 5 to 15 Wt% of colorant, and is applied to the entire surface of the head body by a spray coating method, and then left at room temperature for 24 hours. However, in order to finish in a short time, the film may be cured by forced drying at 80 to 160 ° C.

  The color of the colorant mixed in the clear paint can be selected from red, blue, green, brown, etc. However, in order to obtain a more three-dimensional effect, the red, blue, green A darker shade such as is preferred.

  In addition, the top coat clear coating applied on the color clear coating can be combined with a coating with higher hardness than the color clear coating, but it can be made a coating with excellent durability. When the film thickness is 60 μm or more, there is a problem of peeling of the film, so care must be taken.

  The surface of the head body 1 may be in a polished state of a metal substrate, but after polishing, surface coating treatment such as plating finish or ion plating finish is performed, and characters, marks, etc. are patterned by air blasting. You can also. In this case, the contrast with the rough surface by blasting is further strong, and a more excellent stereoscopic effect can be obtained.

1 is a schematic cross-sectional view of a metal material of a golf club head made of a metal member according to the present invention. It is a cross-sectional schematic diagram which shows the state which is spraying the abrasives by the air blast apparatus on the metal surface which adhered the masking tape. It is a cross-sectional schematic diagram which shows the state which formed patterns, such as a character and a mark by blasting, and removed the masking tape. It is the cross-sectional schematic of the state finished by applying the color clear paint on the surface.

Explanation of symbols

1 Golf club head body 2 Masking sheet 3 Masking sheet substrate 4 Masking sheet adhesive 5 Air blast nozzle 6 Air blast abrasive 7 Blast rough surface 8 Color clear coating 9 Top coat clear coating

Claims (5)

A step of forming a partial shielding coating by a masking sheet on the surface of a golf club head made of a metal member, a step of patterning at least the partial shielding coating by air blasting, and a step of applying a color clear coating to the surface The surface treatment method characterized by having. The surface treatment method according to claim 1, wherein the abrasive used for the air blasting is, for example, carborundum or alundum having an average particle diameter of 100 to 500 μm, and the air pressure is 0.3 to 0.8 MPa. 3. The surface treatment method according to claim 1, wherein the color clear paint is a translucent paint obtained by mixing, for example, a colorant into a urethane-based clear paint. The surface treatment method according to any one of claims 1 to 3, further comprising: a base treatment step using at least one primer paint layer under the color clear paint film. The surface treatment method according to any one of claims 1 to 4, wherein the film thickness of the color clear coating film is 10 to 30 µm.

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