Usually the extrusion cylinders are round.
However, in order to effectively squeeze the production of flat width profiles in production, make full use of the geometric similarity between the rectangular inner hole of the flat extrusion cylinder and the flat width thin-walled aluminum alloy profile, and design the inner port of the extrusion cylinder as a flat mouth shape.
Advantages: The inner hole shape of the extrusion cylinder is similar to that of the outer contour of the shoulder wide thin-walled profile, and the squeezed metal flow is much more uniform than the extrusion of the wall plate with a cylinder. At the same time, the use of shoulder tube extrusion can reduce the extrusion capacity of the extruder requirements.
Main points: Using the geometric similarity between the rectangular inner hole of the flat extrusion cylinder and the flat width thin-walled aluminum alloy profile, a high-45# steel plate thin-walled profile with a higher specific pressure extrusion ratio can be used.
Especially for thin-walled flat cage solid and hollow aluminum alloy wall profile, the use of flat extrusion tube extrusion than the circular extrusion tube extrusion shows greater superiority. In order to improve the stress condition, improve the service life, facilitate the processing and replacement of the inner sleeve, reduce the cost, the flat extrusion cylinder mostly adopts the 3〜4 layer overflow heat installation structure.