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Extrusion Process: Types, Advantages and Disadvantages

The extrusion process is comparable to drawing, except that drawing extends the metal workpiece using tensile stress. Compared to drawing in one pass, the compressive force allows for significant distortion. Plastic and aluminium are the most widely used materials for extrusion. This article presents all the information you need to understand the extrusion process better. The material that emerges from the die is known as “extrudate”. The metal endures compressive and shear stress to achieve the die shape.Get more news about Micro Precision Cold Extrusion Part Exporter,you can vist our website!

What is the Extrusion Process?
The extrusion process is a manufacturing method that involves pushing a material, often in the form of a plastic or metal, through a die or shape-forming tool. The material is typically heated and then forced through the die by a screw or ram, which shapes it into the desired form. The extrusion process is used to create a wide range of products, including pipes, tubing, cables, sheets, and structural shapes. It is also used in the production of food products such as pasta, cereal, and snacks.
How does the Extrusion Process Work?
Extrusion involves the use of compression in the metal-forming process. Under the process, pressure is created, causing a force to be applied to a piece of metal. Following is a process summary to guide you through

Preparation of Feed Metal
The billet or ingot is the feed metal used as a raw material in the extrusion process. However, the feed metal must adhere to the designers' specifications. It usually has a circular or square profile but can also have other shapes. The feed metal is produced using hot rolling or continuous casting techniques.

Preparation for Extrusion
The standard raw material is then placed in extrusion equipment, such as a press, and heated to the temperature recommended for the hot extrusion method. Because cold extrusion occurs at room temperature, no preheating is required.

Metal Extrusion
The extrusion process is now carried out by applying a compressive force to the material, which pushes it toward the die. There is a small opening in the die. The pressure is released when this process is finished, and the product proceeds to the next step.

Heat Treatment and Post-Processing
Heat treatment is now applied to enhance the product's qualities and prepare it for its intended use. Different metals require different heat treatment procedures. In the case of aluminium, for instance, it first cools the extruded portion before stretching and cutting it to the required lengths. The pieces are then heated to 350 degrees Fahrenheit and left to cool for four hours when they undergo an ageing process to become hardened.