Die maintenance and replacement of granulator

Abstract: the granulating die head is the production line of expensive, high precision components, in addition to careful operation, but also need a lot of maintenance. In order to prevent the mold head failure caused by downtime, must be properly operated, and take protective measures to ensure that the mold can be used at any time

The granulator head is an expensive and high precision component on the granulation production line, which requires a lot of maintenance in addition to careful operation. In order to prevent the mold head failure caused by downtime, must be properly operated, and take protective measures to ensure that the mold can be used at any time. Maintenance, cleaning or adjustment of the process of careless or misoperation, is the main reason for damage to the mold head, therefore must be all contact with the head of the personnel training. The operator must thoroughly understand the function of the die head, know the temperature change, the influence of the adjustment of the mould hole or adjusting rod on the product quality, and also pay attention to the source of the fault. The operator should also know the importance of maintaining a good contact between the heater and the mold, to determine whether there is a fault on the production line, where the fault? When the granulator is pulsating, the choke block of the slit die can not be adjusted, and the device is not designed for this purpose. He must also be able to judge whether or not it exceeds the inlet pressure. In addition, we must pay attention to the mouth or block can not be quickly adjusted, but should be in the adjacent area of moderate change, otherwise it may damage the bolt and block. (Note: only with soft material (copper, brass, aluminum soft) made clear the scraper die within melt, so as not to scratch the wound mold, die die head gap width to measure the application of soft materials such as brass gauge. Even the slightest scratch can cause streaks on the extrudate and reduce the quality of the product

Often need to replace the mold head, especially in the film and sheet extrusion often have this situation, must be someone to operate, it is best to use before the demolition, inspection, installation of new mold head experience. The die disassembling and cleaning, repair and maintenance should be carried out at the designated location, the location should be away from the production site, pay attention to clean and use the corrugated plate with a good cushion, small crane, manual lifting, pulley chains often die head injury. To avoid this risk, consider the use of hemp, which can greatly shorten the time of replacing die.

Heater check is also necessary, pre heater should be equipped with a certain number of heating wire and control system. At this point, it is not necessary to control the heater head individually, but it depends on the size of the die. If the die needs to be thoroughly cleaned, it is necessary to loosen the main bolt of the die, but do not take off, the mold head is still connected with the granulator, just release the relevant.