Heat exchange apparatus for a metal mold

Abstract

A heat exchange apparatus for a metal mold is provided, which includes a heat exchange passage provided for the metal mold, a first supply unit for supplying hot heat carrier to the heat exchange passage and a second supply unit for supplying cold heat carrier to the heat exchange passage. The heat exchange apparatus performs heat exchange for the metal mold by supplying the hot heat carrier and cold heat carrier to the heat exchange passage switching alternately. And the heat exchange apparatus has a feature that it includes an air supply unit for supplying air to the heat exchange passage so that the heat carriers are purged when the hot heat carrier and cold carrier are switched.

1 . A heat exchange apparatus for a metal mold comprising: 
 a heat exchange passage provided for said metal mold;    a first supply unit for supplying a hot heat carrier to said heat exchange passage;    a second supply unit for supplying a cold heat carrier to said heat exchange passage;    an air supply unit;    a plurality of valves; and    a plurality of pipes,    said heat exchange apparatus, which performs heat exchange for said metal mold by supplying said hot and cold heat carriers to said heat exchange passage, switching alternately,    wherein said air supply unit supplies air to said heat exchange passage so that said hot and cold heat carriers are purged when supply of said hot and cold heat carriers is switched,    wherein said first supply unit comprises hot water as said hot heat carrier, a heating tank, a first heater, a first pump, a first pressure control valve and a first pipe,    wherein said second supply unit comprises cold water as said cold heat carrier, a cooling tank, a cooling unit, a second pump, a second pressure control valve and a second pipe,    wherein said plurality of valves comprises a four-way valve for switching supply of said hot and cold heat carriers and for switching air in order to purge said hot and cold heat carriers, and a three-way valve for switching discharge of said hot and cold heat carriers, and    wherein said plurality of pipes comprise a plurality of supply pipes and a plurality of discharge pipes.    
     
     
         2 . A heat exchange apparatus for a metal mold comprising: 
 a heat exchange passage provided for said metal mold;    a heater for heating said metal mold;    a supply unit for supplying a cold heat carrier to said heat exchange passage;    a valve; and    a plurality of pipes,    wherein said heat exchange apparatus which performs heat exchange for said metal mold by supplying said cold heat carrier to said heat exchange passage switching alternately with heat from said heater for heating said metal mold,    wherein said heat exchange apparatus further comprises an air supply unit for supplying air to said heat exchange passage so that said cold heat carrier is purged when supply of said cold heat carrier is switched,    wherein said supply unit comprises cold water as said cold heat carrier, a cooling tank, a cooling unit, a pump, a pressure control valve and a cooling pipe,    wherein said valve comprises a three-way valve for switching supply of said cold heat carrier for switching air in order to purge said cold heat carrier, and    wherein said plurality of pipes comprise a supply pipe and a discharge pipe.    
     
     
         3 . A heat exchange apparatus for a metal mold comprising: 
 a heat exchange passage provided for said metal mold;    a heater for heating said metal mold;    a supply unit for supplying a cold heat carrier to said heat exchange passage;    a valve; and    a plurality of pipes,    wherein said heat exchange apparatus which performs heat exchange for said metal mold by supplying said cold heat carrier to said heat exchange passage switching alternately with heat from said heater for heating said metal mold,    wherein said supply unit comprises cold water as said cold heat carrier, a cooling tank, a cooling unit, a pump, a pressure control valve and a cooling pipe,    wherein said pump supplies air to said heat exchange passage so that said cold heat carrier is purged when supply of said cold heat carrier is switched,    wherein said valve comprises a three-way valve for switching supply of said cold heat carrier for switching air in order to purge said cold heat carrier, and    wherein said plurality of pipes comprise a supply pipe and a discharge pipe.