The coating is an important process in the production of
plastic woven bags, and it is also a process prone to slippage. So when it comes to this kind of problem, how can we ensure the safe completion of
plastic woven bags coating? To help you solve these problems, our customer manufacturers share some common sense with you based on years of experience.
Align the cots as far as possible in the middle of the cots before winding, and coat the ends of the cots with silicone oil before plastics woven bag coils enter the car. When you are receiving and laying the cloth, the synchronous speed drop is less than 30 meters per minute. Clamp rollers before receiving cloth. Don’t forget to stick tape. After inserting the cloth, look at the edge of the cloth to align and correct the deviation of the optoelectronic eye, then lift the clamping roll, and connect the new cloth. The width of the cloth changes. It is necessary to observe the edge of the cloth and adjust the die edge. The speed is slightly slower before the cloth is connected. After splicing, before the double-layer joint enters the corona, the corona machine should be closed first. After the double-layer joint enters the composite roll, the edge cutter should be raised and the blower should be opened. After the joint, the edge should be cut and closed.
When the joint is rolled up, change the roll in time. In the first class before an operation, adjust the cutting width as soon as possible before going through the fabric and connect the
plastic woven bags. The tension of releasing, winding, the temperature of preheating roll, corona voltage, and coating speed ratio is adjusted well. After the introduction of new cloth, the temperature of the cold roll is low, and the speed of the car should not be higher than 35 meters per minute. Close the cooling roll before starting, wait for the surface temperature of the cooling roll, and then open the cooling water valve. Control the surface temperature of the cooling roll (40-50 degrees Celsius) and adjust the tension of unwinding and winding. Avoid the appearance of bell mouth and waste
plastic woven bags in rewinding, and two touch bell sound prompts. Paper strips are used as markers to indicate that the following processes, including defective coating, blistering, film opening, edge breaking, and other defective products and waste products, should be marked. If the flatness of
plastic woven bags is poor, the release tension will be increased when lotus leaves appear. Before coiling the cloth, the length of the end of the coil and the core iron pipe should be confirmed.
After the cloth is put on, observe the position of the cloth roll and keep it as close as possible to the middle of the cots. If there is too much in the middle of the offset, roll down and turn around in time. Prevent from being unable to rectify the deviation because the rectification journey is in place. In the process of coating, the corona machine, preheating and cooling roll water valves should be shut down in time when the car is withdrawn due to some reasons. After entering the car, open it one by one. When
plastic woven bags have serious lotus leaf edges, do not put them on the operating surface to correct the deviation. When the unwinding tension is increased properly, the tension of the plastic woven bag roll should be released after the winding diameter of the plastic woven bag roll is reduced (if it is a manual shield). When changing specifications, the surface of the rubber roll and the pressing roll should be decontaminated first. Before the coating material is poured into the mixer, the dust on the outer skin of the
packaging bag should be cleaned first. In the mixing process, the paint should be kept clean, dust should be avoided from entering the hopper. You should regularly inject oil into the gas-source triad and you need to drip oil for the wheel and pneumatic track.
