Patent ID: 9687703
Date: 2017-06-27
CPC Classifications: A63B,B22C,B22D

Claim:
1. A method for manufacturing a high-strength golf iron head with a thin striking faceplate comprising: placing a shell mold onto a rotary table, with the shell mold including a crucible portion and a cavity portion in communication with the crucible portion with the rotary table coupled to a rotating shaft rotatable about a rotating axis; placing at least one metal ingot into the crucible portion of the shell mold, and melting the at least one metal ingot into molten metal in a vacuum environment; driving the rotating shaft to rotate the rotary table, causing the molten metal to pour into the cavity portion from the crucible portion of the shell mold; slowly stopping the rotating shaft and removing the shell mold after the molten metal pours into the cavity portion; destroying the shell mold after the molten metal cools and solidifies, obtaining a casting having a cast product portion; separating the cast product portion from the casting to obtain at least one golf iron head; and heat treating the at least one golf iron head to provide a striking faceplate of the at least one golf iron head with a tensile strength of 280-340 ksi, an elongation of 4%-20%, and a minimum thickness of 1.4-1.8 mm excluding a groove depth of the striking faceplate, with placing the shell mold comprising forming the shell mold, with forming the shell mold including: preparing a wax blank including a crucible blank and a casting blank, with the crucible blank including a first connecting portion on an outer periphery of the crucible blank, with the casting blank including a second connecting portion, with the first connecting portion and the second connecting portion integrally connected to each other; forming an enveloping layer on an outer surface of the wax blank; heating the wax blank and the enveloping layer to melt the wax blank out; and after heating the wax blank and the enveloping layer, sintering the enveloping layer at a high temperature to form the shell mold including the crucible portion and the cavity portion integral with the crucible portion.