Golf head and manufacturing method thereof

Abstract

Disclosed is a golf head, comprising a head body and a weight balancing block welded onto the head body which is made of tungsten, nickel and copper and welded onto the titanium alloy head body which can prevent a brittle phase and increase the service life of the golf head; further, the head body is provided with a chamber in which the weight balancing block is placed, the weight balancing block has a surface provided with a welding bead groove towards an inner surface of the chamber which can prevent welding flux from falling off and thus increase welding stability of the weight balancing block. Further disclosed is a method of manufacturing the golf head, by metal injection moulding, the weight balancing block can be made into various complicated shapes matched with the shape of head body, with less moulding process, smooth moulding surface, high flatness and high production efficiency.

1 .- 3 . (canceled) 
     
     
         4 . A method of manufacturing a golf head comprising:
 a weight balancing block manufacturing process, comprising:
 step A of preparing materials: preparing tungsten, nickel and copper, adding a binder into the tungsten, nickel and copper, and manufacturing a mould matched with the shape of the weight balancing block; 
 step B of conducting injection moulding: injecting the tungsten, nickel and copper, and the binder in step A into the mould by metal injection moulding, so as to obtain a workblank of the weight balancing block; 
 step C of demoulding: demoulding the workblank of the weight balancing block in step C from the mould; 
 step D of catalyzing and degreasing: placing the workblank of the weight balancing block in step D into a catalytic degreasing furnace for catalyzing and degreasing; and 
 step E of sintering: placing the workblank of the weight balancing block after catalyzing and degreasing into a heating furnace for sintering; 
   a head body manufacturing process, by which the head body can be obtained through processing; and   an assembly process, comprising:   
       welding the weight balancing block after sintering in step E onto the head body to obtain the golf head. 
     
     
         5 . The method of manufacturing the golf head according to  claim 4 , wherein the binder in step A comprises polyformaldehyde, high density polyethylene, ethylene-vinyl acetate, wax and stearic acid. 
     
     
         6 . The method of manufacturing the golf head according to  claim 5 , wherein the step D comprises:
 step D1: discharging air in the catalytic degreasing furnace and filling nitrogen into the catalytic degreasing furnace; and   step D2: filling concentrated nitric acid after gas atomization into the furnace to decompose and discharge partial polyformaldehyde in the workblank of the weight balancing block in step C.   
     
     
         7 . The method of manufacturing the golf head according to  claim 6 , wherein the catalyzing and degreasing is conducted at a temperature of 100 to 130° C. for 15 to 24 h. 
     
     
         8 . The method of manufacturing the golf head according to  claim 5 , wherein the step E comprises:
 step E1, gasifying and discharging residual polyformaldehyde in the workblank after degreasing and other materials in the binder under a sintering temperature below 800° C.;   step E2, forming a liquid phase for the nickel metal and copper metal in the workblank of the weight balancing block under a sintering temperature of 800 to 1380° C., adding tungsten metal into the liquid phase, and sintering for moulding; and   step E3, cooling the heating furnace to a temperature below 70° C. and then taking out the product.   
     
     
         9 . The method of manufacturing the golf head according to  claim 4 , wherein the proportion of the tungsten to nickel to copper is 70-90 to 7-24 to 3-6. 
     
     
         10 . The method of manufacturing the golf head according to  claim 4 , wherein the head body is provided with a chamber in which the weight balancing block is placed, and the weight balancing block has a surface provided with a welding bead groove towards an inner surface of the chamber.