Extrusion Machine Technical Parameters
Extrusion is a process used to create objects of a fixed cross-sectional profile. The process works by pushing the material through a die of the desired cross-section. The die shape has to be designed to allow the material to flow through it under the required pressure. The extrusion process can be used to make items such as tubes, rods, and cases, which can then be further finished or used in their finished state.
Material to be extruded is placed into a hopper, which is then heated to soften the material and make it easier to pass through the die. An electric heating element or hot oil may be used as the heating source. The material is then forced through the die by a screw, auger, or piston. The pressure required to extrude the material is typically generated by hydraulic cylinders.
The screw used in the extrusion process has several important design considerations. The screw’s flighting must be designed to promote uniform radial distribution of the material and reduce product variability. The pitch of the screw must be optimized to ensure high output and output quality. The screw must also be designed to minimize wear.
The design of the die used in the extrusion process is critical to the success of the product. The dies shape, angle, and size all must be carefully chosen to ensure uniform flow of the material and produce a part with the desired shape and size. The die must also be designed to minimize wear.
The speed of the material going through the die must also be considered. The material must move fast enough to reduce the risk of pressure buildup, but slow enough to minimize variability and reduce the risk of voids forming in the product.
Extruded sections are typically sized and shaped in the extrusion process, However, the parts may need to be trimmed or machined to achieve the desired final shape. This can be done in a separate operation after the extrusion process is complete.
In conclusion, the extrusion process is a powerful tool for producing items of a fixed cross-sectional shape. The design of the die and screw is critical to the success of the process, and the speed of the material must be controlled to reduce product variability. The extruded parts may need to be trimmed or machined after the extrusion process is complete.
