Extrusion forming apparatus, method using the same, and product therefrom

Abstract

An extrusion forming apparatus includes a mold disposed in a front open end of an extruding channel of a housing, a holding seat disposed in front of the front open end and partially extending into the extruding channel to abut the mold, and a vibrating source connected to the housing in abutment with the holding seat and controllable to apply an ultrasonic energy to the mold through the holding seat. An extrusion forming method is carried out by the extrusion forming apparatus. An extruded product is made by the extrusion forming method using the extrusion forming apparatus.

What is claimed is: 
     
         1 . An extrusion forming apparatus, comprising:
 a housing having an extruding channel;   a mold disposed in said extruding channel and located at a front open end of said extruding channel;   an extruding rod movably disposed in said extruding channel, a front end of said extruding rod being disposed in a rearward of said mold;   a holding seat disposed in front of said housing, said holding seat having a rear end partially extending into said extruding channel and abutting against said mold; and   a vibrating source controllable to apply an ultrasonic wave energy to said mold through said holding seat.   
     
     
         2 . The extrusion forming apparatus as claimed in  claim 1 , further comprising a pressing plate disposed between said extruding rod and said mold in said extruding channel, a pressing space being formed between said pressing plate and said mold. 
     
     
         3 . The extrusion forming apparatus as claimed in  claim 1 , wherein said vibrating source is fixed to a front end of said housing and abuts against said holding seat. 
     
     
         4 . An extrusion forming method by using an extrusion forming apparatus as claimed in  claim 1 , comprising:
 preheating an ingot;   activating the vibrating source of the extrusion forming apparatus;   placing the ingot in the extruding channel of the housing; and   operating the extruding rod to press forwardly the ingot so that the ingot is extruded through and shaped by the mold,   wherein an ultrasonic wave energy of the vibrating source is applied to the ingot through the mold.   
     
     
         5 . The extrusion forming method as claimed in  claim 4 , wherein a pressing plate is disposed in the extruding channel of the housing between the extruding rod and the mold, the ingot is placed in the extruding channel by being disposed between the pressing plate and the mold, and the extruding rod is operated to push forward the pressing plate so that the ingot is pressed and extruded through the mold and shaped. 
     
     
         6 . The extrusion forming method as claimed in  claim 4 , wherein the ingot is coated with a high temperature lubricant with the ingot before being placed in the extruding channel. 
     
     
         7 . The extrusion forming method as claimed in  claim 4 , wherein the ingot is coated with glass sand before being placed in the extruding channel. 
     
     
         8 . The extrusion forming method as claimed in  claim 4 , wherein the ingot is made of steel. 
     
     
         9 . The extrusion forming method as claimed in  claim 4 , wherein the vibration frequency of the vibrating source ranges between  20  and  32  KHz. 
     
     
         10 . An extruded product made by the method as claimed 
     
     
         4 . m  4  using the extrusion forming apparatus as claimed in  claim 1 , comprising a U-shaped channel made of steel and including
 a longitudinal base wall, and 
 two longitudinal left and right walls extending upwardly from two opposite ends of said longitudinal base wall and spaced apart from each other, said longitudinal left and right walls and said longitudinal base wall defining a longitudinal groove.