Tire wheel and method for manufacturing the same

Abstract

A disc portion and a rim portion of a tire wheel are integrally formed simultaneously, with a resonance pipe formed between the disc and rim portions, by inserting a molten metal into a space formed by a mold combined with the resonance pipe by core pins.

What is claimed is: 
     
         1 . A method for manufacturing a tire wheel having a disc portion mounted to a vehicle and a rim portion for mounting a tire, the method comprising steps of:
 combining a plurality of core pins with a resonance pipe of a ring-shaped hollow pipe;   preheating the resonance pipe;   combining the preheated resonance pipe to a mold through the plurality of core pins;   inserting a molten metal into the mold such that the resonance pipe may be circumferentially formed between the disc portion and the rim portion and formed inside the tire wheel; and   fabricating a plurality of sound absorbing holes that penetrate into the resonance pipe and are equally spaced along a circumference of the rim portion.   
     
     
         2 . The method of  claim 1 , wherein the resonance pipe is made of a material having a melting point higher than a material of the disc portion and the rim portion. 
     
     
         3 . The method of  claim 2 , wherein the resonance pipe is made of steel or a steel alloy material. 
     
     
         4 . The method of  claim 1 , wherein the core pin is made of titanium or a titanium alloy material.