EXTRUSION
EXTRUSION
At SJS Products, a Jamcor Corporation, you will find we offer a comprehensive range of engineering support and solutions. Our expertise extends to 3D printing, CNC milling, chemical etching and more, and we can also help with projects that are at the design stage thanks to our experienced and knowledgeable team. We are proud of a reputation for first class service and results, and we are also the people to come to for all your extruded products. Extrusion is one area of engineering manufacturing that we are here to help you with, so what exactly is extrusion, and who may use it?
What is Extrusion?
Extrusion is a method of creating items – usually from metal – that have a detailed or shaped cross-section. To give you an example, think of a metal curtain rail, or for a bigger example, the rails on which a train runs; these have an unusual shape. This shape is achieved by forcing the raw material through a die, which presses it into shape. There are three main methods of extrusion that SJS Products, a Jamcor Corporation, can offer expertise in, these being:
Cold Extrusion – offering a lack of oxidation and higher overall strength, metals that can be extruded in this fashion – at or near room temperature – include among them lead, titanium, aluminium and steel.
Hot Extrusion – this method involves heating the metal – and it can be used for most metals – beyond its crystallisation temperature, which makes it easier to shape by extrusion.
Warm Extrusion – the in-between method, in which the metal is above room temperature but below crystallisation.
Who Uses Extrusion?
Extrusion is a process used in many different areas of industry where shaped cross-sections are required in metal or other items. In metal, it can be used for the likes of glasshouse frames, household items that need such a shape, guttering – also created in plastics – and more. It is a method of creating items such as door frames, pipes and ducts from plastics, and many more items that are used around the home and for commercial use.
Any length of item that has a shape that is not simple or standard when viewed as a cross-section has likely been extruded, and if you are looking at a manufacturing project that involves such, the team at SJS Products, a Jamcor Corporation, is waiting here to talk to you.
More Information
As a leading name in extrusion and engineering solutions and support, SJS Products, a Jamcor Corporation adopts a unique approach when it comes to working with our clients. In fact, we act more as a partner than a supplier, as we take you through the process from beginning to end providing the full scope of our expertise and experience.
Our knowledge of extrusion processes – as well as all other areas of engineering and manufacturing -means that we have built a reputation for excellent service and the very best results with partners across the world, so if you have requirements for advice and help on a project involving extrusion or any of the engineering solutions and services we provide, get in touch with one of the team at SJS Products, a Jamcor Corporation, right now, and we’ll get things underway.
Extrusion is a process used to create objects of a fixed cross-sectional profile. A material is pushed or drawn through a die of the desired cross-section. The two main advantages of this process over other manufacturing processes are its ability to create very complex cross-sections and to work materials that are brittle, because the material only encounters compressive and shear stresses. It also forms finished parts with an excellent surface finish
Hot extrusion is a hot working process, which means it is done above the material’s recrystallization temperature to keep the material from work hardening and to make it easier to push the material through the die. Most hot extrusions are done on horizontal hydraulic presses that range from 230 to 11,000 metric tons (250 to 12,130 short tons). Pressures range from 30 to 700 MPa (4,400 to 101,500 psi); therefore lubrication is required. Lubrication can be oil or graphite for lower temperature extrusions; or glass powder for higher temperature extrusions. The largest disadvantage of this process is its cost for machinery and its upkeep.
Cold extrusion is done at room temperature or near room temperature. The advantages of this over hot extrusion are the lack of oxidation, higher strength due to cold working, closer tolerances, good surface finish and fast extrusion speeds if the material is subject to hot shortness.
Materials that are commonly cold extruded include: lead, tin, aluminum, copper, zirconium, titanium, molybdenum, beryllium, vanadium, niobium and steel.
Warm extrusion is done above room temperature, but below the recrystallization temperature of the material. The temperatures range from 800 to 1800 °F (424 to 975 °C). Warm extrusion is usually used to achieve the proper balance of required forces, ductility and final extrusion properties.