Golf club head and manufacturing method therefor

Abstract

A golf club head manufacturing method comprises steps of: positioning a first end of a sand core, which has a predetermined configuration, in a mold cavity of a mold assembly; injecting liquid wax into the mold cavity to thereby form a wax pattern in which a second end of the sand core is embedded; immersing the wax pattern and the sand core in plaster to form a plaster mold; heating the plaster mold to thereby melt the wax pattern for removing it and thus remaining the sand core; injecting alloy melt into the plaster mold to form a golf club head; and removing the plaster mold and the sand core from the golf club head. Thereby, a gap is formed and extended between a sole plate and a weight integrated with the striking plate.

1 . A manufacturing method for a golf club head, comprising steps of: 
 positioning a first end of a sand core, which has a predetermined configuration, in a mold cavity of a mold assembly;    injecting liquid wax into the mold cavity to thereby form a wax pattern in which a second end of the sand core being embedded;    immersing the wax pattern and the sand core in plaster to form a plaster mold;    heating the plaster mold to thereby melt the wax pattern for removing it and thus remaining the sand core;    injecting alloy melt into the plaster mold to form a golf club head; and    removing the plaster mold and the sand core from a main body of the golf club head;    wherein an elongated gap formed between a sole plate of the main body and a weight located at a rear surface of a striking plate.    
   
   
       2 . The manufacturing method for the golf club head as defined in  claim 1 , wherein the sand core includes an assembling lug and a positioning hole thereof; and wherein the mold assembly is provided with an assembling slot adapted to receive the assembling lug, and a positioning pin adapted to extend through the positioning hole.  
   
   
       3 . The manufacturing method for the golf club head as defined in  claim 1 , wherein the elongated gap and the weight are commonly extended along the sole plate from a toe end to a heel end.  
   
   
       4 . The manufacturing method for the golf club head as defined in  claim 1 , wherein the elongated gap has a width in a range of 0.5 to 8.0 mm.  
   
   
       5 . The manufacturing method for the golf club head as defined in  claim 1 , wherein the weight has a maximum thickness substantially greater than or equal to 2.5 times of a thickness of the striking plate.  
   
   
       6 . The manufacturing method for the golf club head as defined in  claim 1 , wherein the main body has a center of gravity and a distance thereof; the distance spaced apart the sole plate is substantially smaller than or equal to 20 mm.  
   
   
       7 . The manufacturing method for the golf club head as defined in  claim 1 , wherein the rear surface of the striking plate is provided with a shallow groove successively extended along a toe end, a side plate, a crown plate and a heel end.  
   
   
       8 . A golf club head substantially forming with an integrated main body, comprising: 
 a striking plate coupled to a front surface of the golf club head;    a weight incorporated into a rear surface of the striking plate, and being proximate a sole plate; and    an elongated gap formed between the sole plate of the golf club head and the weight located on the rear surface of the striking plate.    
   
   
       9 . The golf club head as defined in  claim 8 , wherein the elongated gap and the weight are commonly extended along the sole plate from a toe end to a heel end.  
   
   
       10 . The golf club head as defined in  claim 8 , wherein the elongated gap has a width in a range of 0.5 to 8.0 mm.  
   
   
       11 . The golf club head as defined in  claim 8 , wherein the weight has a maximum thickness substantially greater than or equal to 2.5 times of a thickness of the striking plate.  
   
   
       12 . The golf club head as defined in  claim 8 , wherein the main body has a center of gravity and a distance thereof; the distance spaced apart the sole plate is substantially smaller than or equal to 20 mm.  
   
   
       13 . The golf club head as defined in  claim 8 , wherein the rear surface of the striking plate is provided with a shallow groove successively extended along a toe end, a side plate, a crown plate and a heel end.