Abstract: The invention prevents a resin member from being broken so as to improve durability. The invention provides a golf club head (1) in which at least a part of a crown portion (4) forming an upper surface of the head is formed by a resin member (FR) made of a fiber reinforced resin in which a fiber is oriented in a matrix resin. The resin member (FR) includes a one-way fiber reinforced resin layer in which the fiber is oriented in one direction, and a fiber intersection lamination portion which is laminated so as to differentiate a direction of the fiber. At least two one-way fiber reinforced resin layers which are adjacent in a thickness direction are intersected at an angle of 30 to 130 degrees of the fiber. Further, a compressive strength of the fiber of the one-way fiber reinforced resin layer which is arranged in an innermost side in the fiber intersection lamination portion is set to be equal to or more than 1.3 GPa.

Abstract: The invention prevents a resin member from being broken so as to improve durability. The invention provides a golf club head (1) in which at least a part of a crown portion (4) forming an upper surface of the head is formed by a resin member (FR) made of a fiber reinforced resin in which a fiber is oriented in a matrix resin. The resin member (FR) includes a one-way fiber reinforced resin layer in which the fiber is oriented in one direction, and a fiber intersection lamination portion which is laminated so as to differentiate a direction of the fiber. At least two one-way fiber reinforced resin layers which are adjacent in a thickness direction are intersected at an angle of 30 to 130 degrees of the fiber. Further, a compressive strength of the fiber of the one-way fiber reinforced resin layer which is arranged in an innermost side in the fiber intersection lamination portion is set to be equal to or more than 1.3 GPa.

Abstract: The invention prevents a resin member from being broken so as to improve durability. The invention provides a golf club head (1) in which at least a part of a crown portion (4) forming an upper surface of the head is formed by a resin member (FR) made of a fiber reinforced resin in which a fiber is oriented in a matrix resin. The resin member (FR) includes a one-way fiber reinforced resin layer in which the fiber is oriented in one direction, and a fiber intersection lamination portion which is laminated so as to differentiate a direction of the fiber. At least two one-way fiber reinforced resin layers which are adjacent in a thickness direction are intersected at an angle of 30 to 130 degrees of the fiber. Further, a compressive strength of the fiber of the one-way fiber reinforced resin layer which is arranged in an innermost side in the fiber intersection lamination portion is set to be equal to or more than 1.3 GPa.

Abstract: The invention prevents a resin member from being broken so as to improve durability. The invention provides a golf club head (1) in which at least a part of a crown portion (4) forming an upper surface of the head is formed by a resin member (FR) made of a fiber reinforced resin in which a fiber is oriented in a matrix resin. The resin member (FR) includes a one-way fiber reinforced resin layer in which the fiber is oriented in one direction, and a fiber intersection lamination portion which is laminated so as to differentiate a direction of the fiber. At least two one-way fiber reinforced resin layers which are adjacent in a thickness direction are intersected at an angle of 30 to 130 degrees of the fiber. Further, a compressive strength of the fiber of the one-way fiber reinforced resin layer which is arranged in an innermost side in the fiber intersection lamination portion is set to be equal to or more than 1.3 GPa.

Abstract: The invention prevents a resin member from being broken so as to improve durability. The invention provides a golf club head (1) in which at least apart of a crown portion (4) forming an upper surface of the head is formed by a resin member (FR) made of a fiber reinforced resin in which a fiber is oriented in a matrix resin. The resin member (FR) includes a one-way fiber reinforced resin layer in which the fiber is oriented in one direction, and a fiber intersection lamination portion which is laminated so as to differentiate a direction of the fiber. At least two one-way fiber reinforced resin layers which are adjacent in a thickness direction are intersected at an angle of 30 to 130 degrees of the fiber. Further, a compressive strength of the fiber of the one-way fiber reinforced resin layer which is arranged in an innermost side in the fiber intersection lamination portion is set to be equal to or more than 1.3 GPa.

Abstract: A golf club head which has a head volume V of not less than 300 cc, and a gravity point distance C (mm) satisfying the following condition: C?0.12×V?8, and optionally, the ratio (M/V) of the moment of inertia M (g·sq.cm) of the club head around a vertical axis passing through the gravity point of the club head to the head volume V (cc) is se in a range of from 9.0 to 11.0, and a sweet spot height is set in a range of from 25 to 40 mm.

Abstract: A golf club head which has a head volume V of not less than 300 cc, and a gravity point distance C (mm) satisfying the following condition: C?0.12×V?8, and optionally, the ratio (M/V) of the moment of inertia M (g·sq.cm) of the club head around a vertical axis passing through the gravity point of the club head to the head volume V (cc) is se in a range of from 9.0 to 11.0, and a sweet spot height is set in a range of from 25 to 40 mm.

Abstract: A golf club head which has a head volume v of not less than 300 cc, and a gravity point distance C (mm) satisfying the following condition: C?0.12×V?8, and optionally, the ratio (M/V) of the moment of inertia M (g·sq.cm) of the club head around a vertical axis passing through the gravity point of the club head to the head volume V (cc) is se in a range of from 9.0 to 11.0, and a sweet spot height is set in a range of from 25 to 40 mm.

Abstract: A golf clubhead containing a main body and a face member, the main body including a main shell portion having a hollow and a tubular inner extension of a hosel protruding in the hollow, and at least a part of the tubular inner extension separating from the inner surface of the main shell portion. A method of making the golf clubhead, which includes making a first lost form corresponding to the main shell portion, making a second lost form corresponding to the tubular inner extension, fixing the second lost form to the first lost form to make a third lost form corresponding to the main body, making a casting mold using the third lost form, and casting a metallic material into the main body using the casting mold.

Abstract: The invention prevents a resin member from being broken so as to improve durability. The invention provides a golf club head (1) in which at least apart of a crown portion (4) forming an upper surface of the head is formed by a resin member (FR) made of a fiber reinforced resin in which a fiber is oriented in a matrix resin. The resin member (FR) includes a one-way fiber reinforced resin layer in which the fiber is oriented in one direction, and a fiber intersection lamination portion which is laminated so as to differentiate a direction of the fiber. At least two one-way fiber reinforced resin layers which are adjacent in a thickness direction are intersected at an angle of 30 to 130 degrees of the fiber. Further, a compressive strength of the fiber of the one-way fiber reinforced resin layer which is arranged in an innermost side in the fiber intersection lamination portion is set to be equal to or more than 1.3 GPa.

Abstract: A golf clubhead containing a main body and a face member, the main body including a main shell portion having a hollow and a tubular inner extension of a hosel protruding in the hollow, and at least a part of the tubular inner extension separating from the inner surface of the main shell portion. A method of making the golf clubhead, which includes making a first lost form corresponding to the main shell portion, making a second lost form corresponding to the tubular inner extension, fixing the second lost form to the first lost form to make a third lost form corresponding to the main body, making a casting mold using the third lost form, and casting a metallic material into the main body using the casting mold.

Abstract: A golf clubhead containing a main body and a face member, the main body including a main shell portion having a hollow and a tubular inner extension of a hosel protruding in the hollow, and at least a part of the tubular inner extension separating from the inner surface of the main shell portion. A method of making the golf clubhead which includes making a first lost form corresponding to the main shell portion, making a second lost form corresponding to the tubular inner extension, fixing the second lost form to the first lost form to make a third lost form corresponding to the main body, making a casting mold using the third lost form, and casting a metallic material into the main body using the casting mold.

Abstract: A golf club head comprises a main body and a face member attached to the main body. The face member comprises a main portion forming a ball striking face and an extended part. The extended part extends 5 to 30 mm backward from at least part of the edge of the ball striking face. The thickness of the extended part is less than the thickness of the main portion.

Abstract: A golf club head which has a head volume v of not less than 300 cc, and a gravity point distance C (mm) satisfying the following condition: C≦0.12×V−8, and optionally, the ratio (M/V) of the moment of inertia M (g·sq.cm) of the club head around a vertical axis passing through the gravity point of the club head to the head volume V (cc) is se in a range of from 9.0 to 11.0, and a sweet spot height is set in a range of from 25 to 40 mm.

Abstract: A golf clubhead comprises a main body and a face member, the main body comprising a main shell portion having a hollow and a tubular inner extension of a hosel protruding in the hollow, and at least a part of the tubular inner extension separating from the inner surface of the main shell portion. A method of making the golf clubhead comprises making a first lost form corresponding to the main shell portion, making a second lost form corresponding to the tubular inner extension, fixing the second lost form to the first lost form to make a third lost form corresponding to the main body, making a casting mold using the third lost form, and casting a metallic material into the main body using the casting mold.

Abstract: A golf club head comprises a main body and a face member attached to the main body. The face member comprises a main portion forming a ball striking face and an extended part. The extended part extends 5 to 30 mm backward from at least part of the edge of the ball striking face. The thickness of the extended part is less than the thickness of the main portion.