Golf ball

Abstract

A golf ball 2 includes a core 4 and a cover 6 positioned outside the core 4. The cover 6 is formed in a mold having support pins by injection molding. A ratio (V / S) of a volume V (mm3) of the cover 6 to an amount of compressive deformation S (mm) of the core 4 is not less than 1000 and not greater than 1900. The cover 6 has a shore D hardness of not greater than 62. The golf ball 2 has a plurality of dimples 8 on a surface thereof. A total volume W of these dimples is not less than 490 mm3 and not greater than 620 mm3. A ratio (α / P) of a latitude α (degree) of each support pin to a total cross-sectional area P (mm2) of the support pins is not less than 0.35 and not greater than 0.60.

Description

[0001]This application claims priority on Patent Application No. 2017-225523 filed in JAPAN on Nov. 24, 2017. The entire contents of this Japanese Patent Application are hereby incorporated by reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to golf balls. Specifically, the present invention relates to golf balls having a core and a cover.Description of the Related Art[0003]In an accurate shot, a golf ball is hit at the sweet spot of a clubface. The shock generated upon this shot is small. Upon a mishit, a golf ball is hit at a location other than the sweet spot of a clubface. The shock upon a mishit is great. The great shock gives pain to the hands of the golf player. At this time, the player feels discomfort. In particular, upon a mishit made when the air temperature is low (for example, in winter), the player feels acute pain.[0004]Generally, golf players desire golf balls having favorable feel at impact. In particular, beginners pref...

AI Technical Summary

Benefits of technology

The patent text describes a golf ball with a specific ratio that makes it durable and easy to hit. It also helps to prevent the ball from spinning too much. The amount of deformation in the ball should be at least 3.5 mm. This formula helps to create a better quality golf ball.

Problems solved by technology

The great shock gives pain to the hands of the golf player.

At present, thread-wound balls are almost not commercially available.

Upon shots by beginners, golf balls often fly in an unintended direction.

However, in this golf ball, a cover cannot follow deformation of the core.

Large deformation of the core causes breakage of the cover.

The golf ball in which this core is used has poor durability.

However, in this golf ball, a cover does not sufficiently protect the core.

When the golf ball is repeatedly hit, the core is broken.

The golf ball has poor durability.

This injection molding is difficult to carry out.

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