The speed of the calendering machine roller line refers to the circumference velocity of the roller, which is expressed as "m/min".
The line velocity of the roller is a parameter to characterize the production capacity of calendering machine, and it is also one of the parameters to characterize the advanced degree of calendering machine.
1, Roller speed Roller speed is mainly determined according to the process use of calendering machine and the level of automation of production.
Roller speed should be able to meet the requirements of rolling process operation, that is, the roll speed should be adjustable. The international calendering speed is generally up to 50~90 m/min, individual has reached the m/min.
The average speed of wire calendering can reach m/min, and the average speed of calendering is up to m/min when cold calendering is used (the two-layer film is pressed directly on the weft wire curtain).
2. Speed Range The range of stepless variable speed can be called speed range.
Because of the variety of processing materials, the performance difference is large, in order to meet the production capacity and meet the requirements of slow start and operation, the general requirements of calendering machine speed range of about 10 times times.
The maximum speed is determined mainly according to the requirements of the production capacity, and the minimum speed is mainly determined according to the equipment start-up, Operation safety and convenience.
3. Speed Ratio
Because of the different technological requirements of the pressure delay adhesive, the glue or the press, the speed ratio requirements for the rollers are also different, and the speed ratio of different positions on the same calendering machine is different.
The speed ratio of roller is related to the rolling process and material properties. 1) in order to eliminate the bubbles in the glue, the general feeding rollers have a speed ratio, often for 1:1.1~1:1.5, China uses more than 1:1.1~1:1.4.
The soft glue takes a small value. 2) for the glue operation, in order to make the glue into the textile to go, the glue roller requirements have a speed ratio. The larger the speed ratio, the greater the shear force, the better the glue effect, but the speed ratio over the General Assembly damage the strength of the textile, easy to make the rubber coke. And the speed ratio is too small, the osmotic effect of the adhesive is poor.
Generally use 1:1.2~1:1.5, China more use of 1:1.4~1:1.5.
3) for the press, bonding, adhesive and other operations, because the main requirements to obtain extrusion pressure, so the general use of equal speed calendering, speed ratio of 1:1.
4, in the choice of roller speed to consider the factors Roller speed directly affects the power consumption and production capacity of calendering machine. The greater the roll speed, the higher the power and output, the higher the level of mechanized automation for calendering machine.
Therefore, when choosing the roll speed, consider:
1) process requirements for calendering;
2) The manufacturing level of calendering machine;
3) The automation level of the calendering unit.
4) Roller speed should be able to adjust widely and smoothly;
5) pressure delay roller speed as far as possible with high value, which is conducive to the ability to play equipment.
It can be seen that the speed of the roll marks the advanced level of the Calendering machine group.
Because the motor is used to drive each roller individually, it can make the speed ratio between the rollers in a certain range (from 1:1 to up to 1:1.3) arbitrary adjustment, so that a variety of operations can be completed on a calendering machine, which makes the machine more adaptable, and conducive to improving the roll speed.