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  1. Temperature control is possible even with the increased extrusion speed; extrusion can be performed at a constant temperature.

  Liquid nitrogen is supplied to the bearing surface of the mold during aluminum extrusion.
  Liquid nitrogen cools the bearing surface of the mold to control the temperature of the aluminum extruded product to the set temperature.
  Even if the extrusion speed is increased by 2 to 4 times, frictional heat is cooled with liquid nitrogen; thus producing the products at the set extrusion temperature.
  Consequently, it is possible to increase production significantly compared to the existing process.

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  2. Loss of extruded products can be reduced.

  If the aluminum billet is heated to the extrusion temperature and then extruded, product loss in the accelerated process can be drastically decreased due to the liquid nitrogen cooling.
  Extruding heated billets allow the extrusion temperature set by liquid nitrogen cooling to be maintained, reducing losses in the accelerated process.
  The reduced product loss in the accelerated process leads to decreased total product loss and improved production.

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  3. The surface roughness of the product is increased.

  It is possible to keep the extrusion temperature constant with liquid nitrogen cooling, no scale occurs, and none of the extrusion defects such as pick-up are formed.
  By completely preventing the occurrence of scale, the surface roughness becomes significantly higher.
  Since gaseous nitrogen is vaporized after using liquid nitrogen cooling, it serves to block the air.
  This air barrier prevents the oxidation of the extruded products.

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  4. Extruded products at a constant temperature do not undergo changes in their mechanical and physical properties.

  In the bending strength test, the bending strength is kept constant at 500 mm and 1000 mm.
  Since uniform products can be produced in the post-processing, the defect rate is reduced, and the product quality is increased.
  

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  5. Liquid nitrogen cooling drastically increases the number of billets extruded from the extrusion mold.

  Since it completely suppresses the occurrence of scale, the shelf life of the mold can be raised remarkably.
  Existing extrusion molds require reheating and finishing after producing about 30 billets, but extrusion molds using liquid nitrogen cooling increase the number of extrusions by more than 10 times compared to the conventional molds.

In the bending strength test, the bending strength is kept constant at 500 mm and 1000 mm in the products extruded and cooled by liquid nitrogen even with the higher extrusion speed.
Because the extrusion temperature is constant, the extruded products have uniform quality, leading to the uniform quality of finished products.

* Source: Demo Test Report by G.S.ACE

Even if the frictional heat increases by raising the extrusion speed, there is no change in the dimensions of the extruded product because it is cooled with liquid nitrogen and adjusted to the set extrusion temperature.
The table below summarizes the dimensional changes for each section according to the increase in extrusion speed when the liquid nitrogen cooling system is adopted.
With the liquid nitrogen cooling system, the product dimension can be kept constant.

* Source: Demo Test Report by G.S.ACE