Golf club head

By designing face lines with a specific curvature radius and shape on the golf club head, combined with sandblasting, the problem of foreign matter contamination and easy damage to the cutter is solved, achieving efficient foreign matter discharge and improved rotation performance, while improving the durability of the cutter. performance and production efficiency.

Inactive Publication Date: 2011-05-04
DUNLOP SPORTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of rule consistency, sharp edges are not better

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0102] A club head for a sand wedge of "XXIO5 Iron" (trade name) was used as the club head on which no face line was formed. The club head has a loft of 58 degrees and a lie angle of 63.5 degrees. Its material is SUS630, and its forming method is casting. A face line is formed on the club head. exist Figure 5 In the method shown, the surface lines are formed by cutting machining using a tool. The material of the tool is tungsten carbide. The cross-sectional shape of the knife is manufactured to be the same as the upper line. Therefore, the upper lines are formed by one cut.

[0103] The number of face strings provided on one club head is sixteen. The pitch of the upper threads is 3.2 (mm). The length of the longest upper thread is 55 (mm).

[0104] The front surface forming the face lines is subjected to shot finishing. Impact polishing does not substantially change the cross-sectional shape of the face lines.

[0105] A shaft and a grip are attached to the obtained...

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PUM

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Abstract

A golf club head includes a face line having a depth of D1 (mm) and a land area. When a boundary point between the land area and the face line in a section line of a surface of the face line is defined as Pa; a point of which a depth is T1 (mm) is defined as Pb; and a curvature radius of the section line between the point Pa and the point Pb is defined as R1 (mm), the golf club head satisfies thefollowing formulae (1) and (2): R1>T1 (1) 0.10!<=T1!<=0.5 (2) Preferably, a ratio (R1 / T1) is greater than 1.0 and is equal to or less than 3.0.

Description

[0001] This application claims priority to Patent Application No. 2009-244280, filed October 23, 2009, the entire contents of which are incorporated herein by reference. technical field [0002] The present invention relates to a golf club head having a face thread. Background technique [0003] A faceline is formed on many golf club heads. Face lines can help increase the backspin of the ball. [0004] When the edge of the upper line is sharp, the turning speed can be increased. However, in terms of rule consistency, the sharp edge is not better. Accordingly, techniques for applying fillets and chamfers to edges are disclosed. Japanese Patent Application Laid-Open No. 2009-148538 (US2009 / 143165, US2009 / 143166) discloses an upper line having rounded edges in order to comply with regulations. Japanese Patent Application Laid-Open No. 2009-34393 (US2009 / 036228) discloses an upper thread having an edge of an arc-shaped indentation. Japanese Patent Application Laid-Open No....

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): A63B53/04A63B102/32
CPCA63B53/04A63B53/047A63B53/0487A63B2209/00A63B2209/023A63B53/0445A63B53/0408A63B53/0416A63B60/00
OwnerDUNLOP SPORTS CO LTD