As the heart of the continuous cast machine, the importance of copper mould tube is self-evident, so its production process requirements are also high. Now, most of the copper mould tubes are made with concave and convex mold on the horizontal or duration press, and the copper mould tubes with larger section size, the pressure of the press is greater than 800 tons, and increase the molding channel of the extrusion machine appropriately.

The key of the copper tube is the fit between it and the mold. That is, the inner cavity size should be fully conform to the production accuracy of the mold.

There are two main factors affecting the paste compatibility in the production

1. Appropriate wall thickness deformation of.

If the copper tube of the crystallizer is squeezed deformation, and the deformation amount is small, the inner surface can not produce enough plastic deformation, causing the copper tube to not film. And the deformation of deformation is large, the compression resistance increases, easy to straighten the formed pipe wall. Therefore, the selection of the deformation amount of the copper mould tube is the key.

2. Eliminate the internal stress of the copper tube forming.

Cause of internal stress: in the extrusion deformation of copper pipe with large wall thickness, the deformation amount of internal and external surfaces is different. The metal on the outer surface is pulled long and the inner surface deform less or unchanged, causing large internal stress inside the tube. During subsequent processing, these internal stresses are released to cause copper tube deformation. Therefore, in the process of crystallization copper forming, process measures should be used to eliminate the internal stress.

How to strictly implement the production process standard, is the key to ensure the production of high-quality copper mould tube.