Controlling the temperatures involved in the manufacture of aluminium extrusions is critical to the production of successful components and the durability of the equipment used…
Controlling the temperatures involved in the manufacture of aluminium extrusions is critical to the production of successful components and the durability of the equipment used in the manufacturing process.
Experience And Control
The aluminium extrusion process involves dynamic forces that need an accurate gauge of the temperatures at different stages of the process to produce high quality components. Traditionally, the temperature is measured using a non-contact pyrometer for accurate readings, although the experience of the manufacturer in supervising the extrusion process is a vital input that cannot be underestimated.
Using A Pyrometer
Aluminium extrusions can be successfully manufactured with the aid of a multi-wavelength IR pyrometer. This equipment is necessary for obtaining accurate temperature readings which determines much of the process. The pyrometer can influence the speed of productivity, the quality of the extrusions and cuts the manufacturer’s overheads by using energy more efficiently.
Temperature During The Extrusion Process
The mill finish aluminium ingots have too be heated to a temperature of between 420 and 500 degrees Celsius to allow the metal to soften. Achieving the optimum temperature reduces the stress placed on the aluminium which ensures that defects are avoided. It governs an efficient use of gas or electricity through not heating the aluminium beyond the right temperature.
Aluminium extrusions that are produced at low temperatures result in an equally slow process which causes a lower productivity rate. Increasing the heat during the aluminium extrusion to the correct temperature, increases the speed at which they are produced as the power press speeds up accordingly and results in an increase in productivity. However, increasing the temperature beyond the narrow margin of 580 to 600 degrees Celsius, is far too excessive and can damage the quality of the extrusions being produced.
End Of The Process
Transferring the aluminium extrusions to the cooling table is often regarded as a critical moment of the process. The extrusions have to be drastically reduced in temperature by using either water or air to achieve the exact density of the metal needed to provide optimum performance once the extrusions have been cured by an additional heating process.
Experience Of The Manufacturer
Although the production of aluminium extrusions could become less reliable with varied results without the aid of a pyrometer to achieve pin-point accuracy, the experience of the manufacturers involved is critical in gauging the process. Edmo have years of experience at producing high quality aluminium extrusions.