Abstract: The present invention discloses a titanium-alloy substrate which is formed plastically by performing die casting and forging to alloyed titanium at least one time. The present invention is characterized in that this titanium-alloy substrate is provided with a first structure layer which is arranged in a configuration of long axis crystal structure, and a second structure layer which is disposed on a side in adjacent to the first structure layer and is arranged in a configuration of equiaxed crystal structure.

Abstract: The present invention discloses a titanium-alloy substrate which is formed plastically by performing die casting and forging to alloyed titanium at least one time. The present invention is characterized in that this titanium-alloy substrate is provided with a first structure layer which is arranged in a configuration of long axis crystal structure, and a second structure layer which is disposed on a side in adjacent to the first structure layer and is arranged in a configuration of equiaxed crystal structure.

Abstract: A cast molding method accomplishes the cast molding by a smelting chamber, a casting chamber, a hinge press system and a vacuum system. First, a metallic die is assembled in the casting chamber and then a metallic material is put in the smelting chamber. Next, the metallic material is heated up in a vacuum state and the casting chamber is pre-heated at a same time. After the metallic material in the smelting chamber has been melted down and the casting chamber has been vacuumized, the melted metallic material is filled into the metallic die, and then the hinge press system is turned on to cast mold the metallic die, resulting in a semi-solid product. After the semi-solid product has been cooled down, the product of cast molding is accomplished according to the present invention.

Abstract: A manufacturing method of an iron-type golf club head has acts of preparing a formed bar-shaped steel substrate, rough-hot forging the bar-shaped steel substrate, mid-hot forging the rough blank, fine-cold forging the mid-blank, cold stamping the striking surface and drilling a hosel of the iron-type golf club head. The cold forging reduces the thermal expansion and contraction of the blank, and the shape of the forged blank is more accurate therefore. As a result, the following grinding processes of the blank are reduced. Therefore, the weight of the blank is more accurate, and the manufacturing time and cost are also reduced. The blank does not have to be heated to high-temperature state prior to cold forging so that the blank can be cooled down faster, and the cost of the heating is reduced.

Abstract: A manufacturing method of an iron-type golf club head has acts of preparing a formed bar-shaped steel substrate, rough-hot forging the bar-shaped steel substrate, mid-hot forging the rough blank, fine-cold forging the mid-blank, cold stamping the striking surface and drilling a hosel of the iron-type golf club head. The cold forging reduces the thermal expansion and contraction of the blank, and the shape of the forged blank is more accurate therefore. As a result, the following grinding processes of the blank are reduced. Therefore, the weight of the blank is more accurate, and the manufacturing time and cost are also reduced. The blank does not have to be heated to high-temperature state prior to cold forging so that the blank can be cooled down faster, and the cost of the heating is reduced.

Abstract: A weight adjusting structure of a golf club head comprises a 360-degree rotatable rotary table installed in a body of a golf club head, wherein the rotary table is combined with an incomplete annular weight block at a peripheral portion on an arbitrary side thereof, so that the rotary table and the weight block form a rotary table assembly whose weight orientation can be adjusted. The weighted rotary table assembly installed in the body of the golf club head can be used to adjust a distribution of different weights around 360 degrees, whereby a preferred location of the club head's gravity center can be set according to a golfer's swing posture and a location of the club head's gravity center the golfer is used to.

Abstract: A weight adjusting structure of a golf club head comprises a 360-degree rotatable rotary table installed in a body of a golf club head, wherein the rotary table is combined with an incomplete annular weight block at a peripheral portion on an arbitrary side thereof, so that the rotary table and the weight block form a rotary table assembly whose weight orientation can be adjusted. The weighted rotary table assembly installed in the body of the golf club head can be used to adjust a distribution of different weights around 360 degrees, whereby a preferred location of the club head's gravity center can be set according to a golfer's swing posture and a location of the club head's gravity center the golfer is used to.

Abstract: A weight adjusting structure of a golf club head comprises a 360-degree rotatable rotary table installed in a body of a golf club head, wherein the rotary table is combined with an incomplete annular weight block at a peripheral portion on an arbitrary side thereof, so that the rotary table and the weight block form a rotary table assembly whose weight orientation can be adjusted. The weighted rotary table assembly installed in the body of the golf club head can be used to adjust a distribution of different weights around 360 degrees, whereby a preferred location of the club head's gravity center can be set according to a golfer's swing posture and a location of the club head's gravity center the golfer is used to.

Abstract: A method for making a golf club head includes steps for processing upper and lower shells of the head. A metal- or non-metal-based composite material is provided which has a necessary thickness and whose area and total width are enough for making at least two unit shells, as determined by widths and surface curvatures of the upper and lower shells. A strip of excess material is reserved at a border between the unit shells. The two alternately or non-alternately arranged unit shells are integrally formed through a forming process, wherein an extension force generated while the unit shells are formed is constrained by the excess material to reduce deformation of the unit shells, so that the formed unit shells have flat cutting surfaces when the excess material is cut off, allowing the upper and lower shells thus made to have precise dimensions, improved ends of parts and close contact surfaces.

Abstract: A weight adjusting structure of a golf club head comprises a 360-degree rotatable rotary table installed in a body of a golf club head, wherein the rotary table is combined with an incomplete annular weight block at a peripheral portion on an arbitrary side thereof, so that the rotary table and the weight block form a rotary table assembly whose weight orientation can be adjusted. The weighted rotary table assembly installed in the body of the golf club head can be used to adjust a distribution of different weights around 360 degrees, whereby a preferred location of the club head's gravity center can be set according to a golfer's swing posture and a location of the club head's gravity center the golfer is used to.