Usage, characteristics and precautions of low pressure co-extrusion film blower

Usage, characteristics and precautions of low pressure co-extrusion film blower

The operator must not stand in front of the machine to avoid accidental injury to the operator. When the film blower feeds, it is strictly forbidden that hard objects with metal impurities and operating gadgets that damage the machine fall into the barrel. Do not wear gloves when operating the rotating machine to prevent involvement. Check and improve the lubrication of the gear box and the inside of the machine, and check the lubrication of each mechanical drive unit. To achieve good horizontal and vertical pull force of the blown membrane, a certain proportion of the blown up ratio BUR and the pull ratio DDR must be achieved. If the scale misalignment results in a decrease in the transverse pull force, and if the bubbles are stable with the existing moulds and folds, there is no problem with the BUR.

Avoid damaging the machine and making noise during dry operation. When the moulds are uniform and uniform, gloves can be worn to slowly lift the tube blank, while the end of the tube blank is closed, the air inlet control valve is slightly opened, so that a small amount of compressed air is put into the center hole of the mandrel, and then carefully guided through the foam holder, the herringbone, and put into the traction roll, guide roll until rolled into the film condition range, to increase the forming temperature, the cooling air temperature and the blowing-swelling ratio; Then the film turbidity increases and the gloss decreases. Conversely, increase. Thickness is controlled by the host and traction speed. It is understandable that the faster the host speed, the faster the feed speed, the thicker the membrane, and the opposite is traction. The faster the pull, the thinner the membrane, which is the most important link.

During power-on operation, it is necessary to check each power connection for disconnection or leakage. Check whether the instrument is damaged or not. Make sure all parts are safe and normal before starting up, so as not to affect production and cause accidents. Compressed air pressure for blown tube billet should be appropriate to ensure not only the tube billet cracking but also the symmetry and stability of the membrane tube, which relatively ensures the quality of production. How to control the size and thickness of plastic bags in the production process of film blowers and how to obtain quality-controlled plastic bag products in the processing process of pull film blowers, it is necessary to control each processing link in place. In general, the processing process of plastic film blower is divided into feed heating, traction, and control of air pressure side closure. The size of the plastic bag is controlled by how much air is blown, and then it is stabilized by a membrane stabilizer.

Maintenance and maintenance of film blowers Before and after the purchase of film blowers, most people pay attention to price and maintenance, but people often choose to attribute it to mechanical quality problems because they do not pay attention to the problems arising from the maintenance of film blowers, not to mention the time and money lost in replacing parts. Just for the lifetime of the blower, we should also turn our attention to the daily maintenance of the blower. Check that the temperature control is intact, the heating appliances are intact, and the temperature at each point is within the range of the index. Check that the current, speed, temperature rise, precision, noise and mechanical drive of each running motor meet the standards. Check the oil level and mechanical lubrication of the gear box. Check the traction speed, film width, thickness control is accurate. Observe if the film thickness is uniform and the folding diameter meets the criteria. The plasticization of the film was observed, and the crystal point, rigidity and water mark were detected and treated in time. Check if the raw material ratio and mixing are in conformity with the standards. Regularly correct the center point, level and parallelism of the mould, traction, guide roll.