What is the difference between a continuous mill and a semi-continuous mill?

Profile semi-continuous rolling (semi – tandemrolling . fshape) In profile rolling, one process of rough rolling and finishing rolling is continuous rolling, and the other is a combined rolling method of other discontinuous rolling. Commonly used in alloy steel rolling or retrofitting of old equipment. Profiled semi-continuous rolling process in two forms: one is a continuous rolling rough rolling, finish rolling of the shuttle system or a looper EuE row rolling mill; the other row is for the rough rolling mill using the shuttle Rolling and finish rolling are continuous rolling. At present, the rolling method of the complex double-rolling mill ( see complex double-rolling mill ) used in some small workshops is also a special semi-continuous rolling method, which is to carry out continuous rolling between the front and rear frames. The sleeve rolling is performed between the two groups of rolling mills. When the finish rolling process is continuous rolling, the rolling speed is not limited, and the output is high, but the rolling mill is complicated to adjust, the product variety is difficult to change, the production is not flexible, and the small-section batch production for simple section profiles is carried out ; the finishing rolling process is a horizontal row type When rolling mill rolling or loop rolling, it is convenient to change the rolling type, but the rolling speed is low and the output is low. It is suitable for rolling of profiled sections and multi-variety small batch production ; complex double-type semi-continuous rolling The system is also called double-row semi-continuous rolling, and its advantages are : compact equipment arrangement ; convenient adjustment ; multi-line rolling can be used, and the output is high. The disadvantages are : the sticks are different when rolling in multi-line, the precision of the product is difficult to control ; the rolling of the rolled parts is 180 degrees through the positive disk , which limits the improvement of the rolling speed.