Extrusion is to put the ingot into the extrusion cylinder, and apply pressure to the metal through the extrusion shaft to extrude it from the die hole of the given shape and size to produce plastic deformation to obtain the required extrusion product. processing methods. According to the different direction of metal flow during extrusion. Extrusion can be divided into forward extrusion, reverse extrusion and combined extrusion. In forward extrusion, the movement direction of the extrusion shaft is the same as the flow direction of the extruded metal, while in reverse extrusion, the movement direction of the extrusion shaft is opposite to the flow direction of the extruded metal. According to the heating temperature of the billet, extrusion can be divided into hot extrusion and cold extrusion. In hot extrusion, the ingot is heated to above the recrystallization temperature for extrusion, and in cold extrusion, it is extruded at room temperature.

Drawing is a drawing machine (or drawing machine) that pulls aluminum and aluminum alloy billets (wire billets or tube billets) out of a die L of a given shape and size through a clamp to produce plastic deformation to obtain the desired result. The required processing methods of pipes, rods, shapes and wires. Drawing can be divided into wire drawing, pipe drawing, bar drawing and profile drawing according to the variety and shape of the products produced. Pipe drawing can be divided into empty drawing, drawing with core head and drawing with moving core head. The main elements of the drawing process are the drawing machine, the drawing die and the drawing reel. According to the stretching mode, stretching can be divided into single-mode stretching and multi-mode stretching.