In plastics machinery, calenders are usually connected to leading equipment such as material handling, screening, measuring, kneading and forming, as well as follow-up equipment such as drawing, stretching, embossing, cooling, thickness measurement, winding and cutting, as well as transmission, monitoring and heating equipment to form a complete calendering line for the production of hard and soft films, films, leather, wallpaper and floor roller products.

The working principle of the calender:

1. Relative rotation - two adjacent rollers rotate relative to each other at a certain speed ratio or constant speed;

2. The rubber material is pulled into the roll gap under the action of friction;

3. Due to the gradual reduction of the cross-section of the roller gap, the rubber material is strongly extruded and sheared, and the extension molding is completed, the rubber is pressed or extruded on the steel wire cord, double-sided glue, the surface of the rubber embryo is embossed and formed, and the lamination of multi-layer film.

Calender maintenance and care:

1. Frequently check the condition of the transmission design part of the system to keep the control oil circuit smooth.

2. Pay attention to the bearing and sealing of the roller, if necessary, remove the half-gland, replace the oil-resistant rubber pipe, and when the leakage of the working water head is serious, disassemble the water head and replace a sealing ring.

3. Under normal circumstances, the equipment should be overhauled every two years, check the wear and tear of each component, replace the worn parts, and ensure the installation quality after maintenance.

4. The machine runs for 2000 hours, it should be cleaned once, and the oil should be replaced, the internal lubricating oil grade of the reducer is 220 # gear oil, the reducer should be cleaned once a year, and the oil should be changed once a year, regardless of the operating cycle.

5. The lubricating oil of the main gear of the calender is 100# oil, and the oil pressure is generally adjusted at 0.1~0.2Mpa, pay attention to the change of oil level in the oil tank to ensure the normal operation of the lubrication mechanism.

6. After the calender starts to be used for 300~600 hours at a time, the lubricating oil of the speed reducer and the oil collection tank can be released, and kerosene should be used and cleaned before new lubricating oil is injected.

7. At the end of each shift, turn off the main power supply of the distribution cabinet, wipe the machine, clean the workplace, and keep the environment clean and tidy.

The calender is made of two or more rollers, according to a certain arrangement form, at a certain temperature, the rubber or plastic is calendered into a certain thickness and shape of the film surface, and the fiber cord or steel cord machinery can be hung with glue.

Do you know the advantages of calenders at work?

1. High-quality plastic sheets are produced by calenders, in fact, calenders are good at extrusion, calenders are also very good at handling heat-sensitive polymers, because it is rarely able to cause thermal degradation;

2. Calendering also has the advantage that it mixes polymers with a lot of solid additives well, and the mechanical energy generated by the calender is large, resulting in a large melting rate, therefore, more fillers can be added to the plastic, which can save the cost of raw materials;

3. The calender is a very versatile machine, which adopts three feed shafts, all with electromagnetic powder tension controller, and tile air tent shaft, which fully meets the requirements of PET, intermediate glass fiber, sponge and other thick materials.