Nozzle for cooling vacuum heat treatment furnace

Abstract

Embodiments of the disclosure are drawn to a system for heat treatment of a mold. The system includes a vacuum heat treatment furnace. The vacuum heat treatment furnace includes a tray for receiving the mold, a plurality of nozzles configured to discharge gas flows and arranged into one or more rows that are evenly distributed around a perimeter of the vacuum heat treatment furnace, and one or more extendible pipes installed on a selection of the nozzles. The extendible pipes are selectively extended to one or more lengths.

What is claimed is: 
     
         1 . A system for processing a die casting mold, comprising:
 a vacuum heat treatment furnace, comprising:   a plurality of nozzles, and   one or more extendible pipes, and   one or more thermocouples,   wherein the die casting mold comprises a deep cavity,   wherein the plurality of nozzles are arranged into one or more rows that are evenly distributed around a perimeter of the vacuum heat treatment furnace,   wherein a selection of the plurality of nozzles are installed with the extendible pipe,   wherein the length of the extendible pipe ranges from 50 mm to 250 mm, and is adjustable in accordance with a depth of the deep cavity of the die casting mold so that a distance between an open end of the extendible pipe and the interior surface of the cavity ranges from 450 mm to 600 mm,   wherein the vacuum heat treatment furnace further comprises a tray located at a central position inside the vacuum heat treatment furnace, and the die casting mold is received on the tray, and   wherein the thermocouples are placed on the surface of the deep cavity.   
     
     
         2 . The system of  claim 1 ,
 wherein the extendible pipe is made of a graphite-based material, and has a cylindrical tubular shape, which has a circular interior perimeter,   wherein the interior of a front half portion of the extendible pipe has a circular stepped shape, and is installed onto the open end of one of the nozzles,   wherein an exterior wall of a rear portion of the extendible pipe comprises a plurality of screw holes for fixing the extendible pipe by fastening bolts or screws through the screw holes.   
     
     
         3 . A system for heat treatment of a mold, comprising:
 a vacuum heat treatment furnace comprising a tray for receiving the mold;   a plurality of nozzles configured to discharge gas flows and arranged into one or more rows that are evenly distributed around a perimeter of the vacuum heat treatment furnace; and   one or more extendible pipes installed on a selection of the nozzles;   wherein the extendible pipes are selectively extended to one or more lengths.   
     
     
         4 . The system of  claim 3 , wherein the mold is a die casting mold comprising a cavity. 
     
     
         5 . The system of  claim 4 , further comprising one or more thermocouples placed on the interior surface of the cavity. 
     
     
         6 . The system of  claim 3 , wherein the lengths of the extendible pipes range from 50 mm to 250 mm. 
     
     
         7 . The system of  claim 4 , wherein a distance between an open end of at least one of the extendible pipes and the surface of the mold ranges from 450 mm to 600 mm. 
     
     
         8 . The system of  claim 4 , wherein a distance between an open end of at least one of the extendible pipes and the interior surface of the cavity ranges from 450 mm to 600 mm. 
     
     
         9 . The system of  claim 4 , wherein the extendible pipes are selectively extended to lengths such that distances between open ends of the extendible pipes and the surface of different parts of the mold are substantially the same. 
     
     
         10 . The system of  claim 3 , wherein the extendible pipes are made of at least one graphite-based material. 
     
     
         11 . The system of  claim 3 , wherein the extendible pipes have a shape of a cylindrical tube with a circular interior perimeter. 
     
     
         12 . The system of  claim 11 , wherein a front half portion of the interior of the extendible pipes has a circular stepped shape and is configured to enclose at least part of one of the nozzles. 
     
     
         13 . The system of  claim 3 , wherein an exterior wall of a rear portion of the extendible pipes comprises a plurality of screw holes for fixing the extendible pipes by fastening bolts or screws through the screw holes. 
     
     
         14 . A method for heat treatment of a mold, comprising:
 receiving the mold in a vacuum heat treatment furnace, the vacuum heat treatment furnace comprising:
 a tray for receiving the mold; 
 a plurality of nozzles configured to discharge gas flows and arranged into one or more rows that are evenly distributed around a perimeter of the vacuum heat treatment furnace; and 
 one or more extendible pipes installed on a selection of the nozzles; 
   selectively extending the extendible pipes to one or more lengths, and discharging the gas flows from the plurality of nozzles to cool the mold.   
     
     
         15 . The method of  claim 14 , wherein the mold is a die casting mold comprising a cavity. 
     
     
         16 . The method of  claim 15 , further comprising measuring at least one temperature on the interior surface of the cavity using one or more thermocouples placed thereon. 
     
     
         17 . The method of  claim 14 , further comprising extending the extendible pipes to lengths ranging from 50 mm to 250 mm. 
     
     
         18 . The method of  claim 14 , further comprising extending at least one of the extendible pipes to a length such that the distance between an open end of the extendible pipe and the surface of the mold ranges from 450 mm to 600 mm. 
     
     
         19 . The method of  claim 14 , further comprising selectively extending the extendible pipes to lengths such that distances between open ends of the extendible pipes and the surface of different parts of the mold are substantially the same. 
     
     
         20 . The method of  claim 19 , further comprising cooling different parts of the mold at substantially the same speed.