Sheet die in the production should be considered on the most important, and we lament their production efficiency at the same time should also be necessary for his cleaning and daily maintenance, so that the head in his post to work do the best.
First of all, the operator must thoroughly understand the function of the sheet die, know the temperature changes, mold hole or adjust the bar on the impact of product quality, but also pay attention to the source of the fault.
The operator also understands the importance of maintaining good contact between the heater and the die die, and is it possible to determine if there is a fault on the production line. Where is the fault? For example, when the extruder is pulsed, it is not possible to adjust the blocking block of the slit die (usually the device is not designed for this purpose). He must also be able to determine whether it is overrun based on the measurement of inlet pressure. Also note that the die or block can not be adjusted quickly, but should be moderate in the adjacent area, or it may damage the bolt and block block.
Also note that only the soft material (copper, brass, soft Lu) produced by the scraper to remove the mold within the mold, so as not to scratch the mold, the die die die gap width also use soft materials such as brass gauge To measure. Even the slightest scratches can cause streaks on the extrudate to reduce product quality.
When the need to constantly replace the die, especially in the film and film extrusion often have this situation, must let someone to operate, these people must die structure and function, hand a detailed description (drawings, equipment, parts List), it is best that someone before the use of demolition, inspection, installation of new die experience.
The removal, cleaning, repair and maintenance of the sheet die shall be carried out at a designated location, away from the production site, with a clean and corrugated board, with a small crane, manual lifting, Often damage the die. In order to avoid this danger, you can consider the use of hemp rope. The work site should also be equipped with a variety of tools (screwdriver, torque, wrench), soft shovel (bronze, copper, soft lu), cleaning and polishing materials, if possible, there should be a die preheater, which can greatly shorten the replacement mold Head of the time. And the inspection of the heater is also necessary. This preheater should be equipped with a number of heating wires and control systems. At this point it is not necessary to have a separate control of each die heater, but this depends on the size of the die.
If the sheet die needs to be thoroughly cleaned, the main bolt of the die must be released, but not removed, the die is still attached to the extruder, just loosen the flow channel.