Aluminium Billet-Chump Heating Furnace;
These furnaces are used for heating aluminium billets to 400 - 450° C quickly before being loaded to press machine. Heated billet makes extrussion process easier, but deformates the look of the surface of product. High-temperature extrussion abrades the mould and causes shagginess on the product. But if the billet is cool the press becomes so hard and the mould gets too much pressure although extrussion product's surface has no deformation. Extrussion temperature must be chosen so carefully for best quality. |