COOLING APPARATUS AND COOLING METHOD FOR AN INDIRECT EXTRUDER

WIPO Patent Application WO/2011/034290

A2

The present invention relates to a cooling apparatus and to a cooling method for an indirect extruder, wherein the technical aim of the present invention is to provide a cooling apparatus and a cooling method for an indirect extruder, which enable a cooling medium to flow through a stem and a die, and which directly inject the cooling medium into an extrudate in the die, to thereby prevent the temperature of the extrudate from excessively rising and thus improving the speed of extrusion. For this purpose, the cooling apparatus for an indirect extruder according to the present invention comprises a stem, a die and a billet. The stem has an outer surface on which a plurality of cooling medium injection ports are formed such that a cooling medium can be supplied therethrough, and has an interior in which a plurality of cooling medium conveying pipes are connected to the respective cooling medium injection ports to enable the cooling medium to flow toward the ends of the cooling medium conveying pipes. The die is connected to an end of the stem, and has an interior in which a plurality of cooling medium dispersing pipes are formed to disperse the cooling medium conveyed through the cooling medium conveying pipes, and has an outer surface on which a cooling medium dispersing groove is formed. The cooling medium dispersing groove has dispersing holes connected to the cooling medium dispersing pipes such that the cooling medium conveyed through the cooling medium conveying pipes is uniformly supplied to the cooling medium dispersing pipes via the dispersing holes. The billet is arranged at an end of the die to shape the extrudate that has been extruded through the stem and the die by indirect extrusion. The cooling medium cools the die while passing through the cooling medium dispersing pipes, and cools the extrudate while being directly injected into the extrudate after passing through the cooling medium dispersing pipes.

JPS5577924	WIRE DRAWING METHOD FOR MANUFACTURING WIRE WITH SUPERIOR SURFACE QUALITY
JP4246587	A guide jig for passing the tip of the ultrafine wire material through the die hole and an ultrafine wire drawing device with the jig.

PARK SUNG SOO (KR)
KIM HA SIK (KR)
YOU BONG SUN (KR)

PCT/KR2010/005599

March 24, 2011

August 23, 2010

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KOREA MACH & MATERIALS INST (KR)
PARK SUNG SOO (KR)
KIM HA SIK (KR)
YOU BONG SUN (KR)

B21C3/14; B21C29/04

KR20090078039A	2009-07-17
JPH08117837A	1996-05-14
JP2001038415A	2001-02-13
JPS61262421A	1986-11-20

LEE, WON-HEE (KR)
이원희 (KR)

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