rubber roller

Production requirements of rubber rollers:

1. The structure of the coating layer is subject to the drawings.

2. Check the entire roll surface before lagging. If there is a defect, use the same welding material to eliminate the defect.

3. Clean the roller surface with gasoline after passing the inspection of the roller core, and then carry out soaking treatment after cleaning to improve the roughness of the roller surface to increase the bonding force between the rubber layer and the roller core. During shot peening, the roller body rotates at a constant speed of 360°, and the spray gun moves at a constant speed in a straight line to ensure the uniformity of shot peening.

4. After the shot blasting, a layer of adhesive should be applied on the surface to increase the bonding force between the adhesive layer and the roller core.

5. Select the type, color, hardness and temperature resistance of the glue according to the drawing.

5-1. Polyurethane casting method: (Generally, polyester or polyether is used, the temperature resistance of polyester is 80℃, and the temperature resistance of polyether is 120℃). Put the roll core treated on the roll surface into the mold and fix it. Put the proportioned PU raw material into the reaction furnace and heat it to a liquid state, then pour it into the mold, the roller with a diameter of 500mm or more, the injection speed is about 11-12KG/MIN, and the roller with a diameter of less than or equal to 500mm, the injection speed About 5-6KG/MIN. After the glue injection is completed, cure for 1 hour and enter the vulcanization process.

5-2. Black rubber coating method: put the roller core with the treated roller surface into the rubber roller winding machine and fix it. Put the reacted rubber raw material into the feeding port of the winding machine, start the equipment, and let the rubber evenly rotate on the roll core. After the winding is completed, use the tool to press the rubber layer to prevent the rubber layer from being broken or entering the air, etc., and fix it. Enter the vulcanization program.

6. Put the wrapped rubber roller into the vulcanization box, control the temperature at 120 °C, and take out the air to cool after 16 hours of heat preservation.

7. After the rubber surface is processed, there should be no obvious color difference, bubbles, holes, cracks, indentations and scratches on the surface. After the rubber surface is processed, the following dimensions must be guaranteed: outer diameter, rubber surface length, thickness, roll shape, and surface roughness.

Generally, the hardness of polyurethane is 85-95SHA, but the hardness of dipping roller and coating roller is relatively soft. At 55-65SHA, the maximum diameter can reach D2100mm, which is widely used in cold rolling industry, such as color coating line, pickling line, Silicon steel wire, galvanized wire and so on.