LJ300 Continuous Extrusion Machine is invented

When the LJ continuous extrusion machine is under the condition of extruding, it spindle will be longer after being heated, which will make the spindle move to one side and emerge strong axial force. It will be harmful to the spindle, abrade extrusion wheel, and the quality of the product. In order to reduce the harmful spindle displacement during the extruding process, and improve the strained condition, we designed coupling machine, which allows the spindle doing axial play when it is under little loading. It has been known that, the force state of the spindle system of continuous extrusion machine has been developed after improving, and the useful life of continuous extrusion machine can be longer than before.

LJ300 Continuous Extrusion Machine is invented by Central South University of Technology. We found some problems during the productive process: 1. the quality of the product cannot be guaranteed. There are many small bubbles on the surface of the product, which cannot be accepted by customers; 2. The leakage rate of the raw material is high during the productive process, and it will be 80% or more. The pass percent is far lower than the same level of the equipment in foreign countries (98%); 3. The useful life of extruding wheel, bottom sub, and the feeding round is very short, and they often need to be changed, which lead to the high cost. 4. The loading of the equipment is large, and workers have to stop to repair those equipment. For instance, the deceleration boxes are often stop working because of the over loading, which leads to the slowing down of the running rate.