The die of lab banbury mixer is a precious and high-precision part in granulation production line. Besides careful operation, it also needs a lot of maintenance. In order to prevent the shutdown caused by die failure, it is necessary to operate correctly and take protective measures to ensure that the die is available at any time. Careless or incorrect operation during maintenance, cleaning or adjustment is the main cause of die damage. Therefore, strict training must be carried out for all personnel who contact die. The operator must thoroughly understand the function of the die, know the temperature change, the influence of the adjustment of the die hole or adjusting rod on the quality of the product, and pay attention to the source of the failure. Operators also need to understand the importance of maintaining good contact between heater and die, to be able to judge whether there is a fault on the production line, where the fault is?
When the extrusion of the granulator is pulsating, the blocking block of the slot die can not be adjusted continuously (the general device is not designed for this purpose). He must also be able to determine whether it is out of gauge according to the measurement results of inlet pressure. In addition, it should be noted that the die or blocker can not be adjusted quickly, but should be moderately changed in the adjacent area, otherwise bolts and blockers may be damaged. (Note: Only scrapers made of soft materials (copper, brass, soft aluminium) can be used to clean the melt in the die, so as to avoid scraping the wound die. The gap width of the die should also be measured with soft materials such as brass gauge. Even the slightest scratch will lead to streaks on the extrudate and reduce the quality of the product.
When it is necessary to change the die head frequently, especially in film and sheet extrusion, it is necessary to have a special person to operate it. It is better for someone to have the experience of disassembling, inspecting and installing the new die before using it. The disassembly, cleaning, maintenance and maintenance of the die should be carried out at a designated place, which should be far away from the production site. The die should be cleaned and padded with corrugated plates. Small cranes are available when used. When lifted manually, the chains of pulley groups often damage the die. In order to avoid this danger, the use of hemp rope can be considered, which greatly reduces the time to replace the die.
