After the recycled plastic is melted, it is passed through laser-cut discs. This is how the pelleting process begins and the discs are the most important elements of the process. A condition that prevents them from working properly will result in increased pressure and decreased efficiency. Even the disc may burst with increased pressure and foreign substances may mix with the product. As it can be understood from here, discs should be periodically and sensitively maintained. Worn discs not only impair the health of the end product, but also cause costly part replacements. Proper maintenance is essential for the extrusion line.
The most common method used for filter cleaning is incineration. This burning process does not provide adequate filter cleaning and may permanently damage the laser filter screen. However, thanks to the latest maintenance technologies, downtime can be reduced and productivity can be increased significantly.
Periodic Screen Change
One of the most important problems experienced between laser filter change periods is the increase in machine pressure. This increased pressure causes the screen to burst and contaminate the finished product. Screen explosion, on the other hand, is costly. In order to prevent this, a screen change schedule should be determined. This calendar should include a regular and frequent change schedule. In this way, both the screen can be used for a longer time and there is no stoppage in the production line due to a malfunction. Calculations and experience show that frequent screen replacement costs are much more economical than the costs caused by frequent breakdowns.
Chang Blade Not Filter
Metal particles attached to the filter can seriously scratch the laser filter. The most important reason for this is that the blade that scrapes the contaminants is blunt. This blunt blade not only scrapes these metal particles, but also spins them on the filter surface, causing scratches. They must be replaced before they become blind. Because replacing laser filters costs more than blades. Studies show that weekly blade changes extend the life of laser filters.
Burning Temperatures and Times are Important
A laser screen burning process at 400- 450 degrees for 3-4 hours is ideal for getting the best cleaning result. The oven should be brought to these degrees Celsius gradually, not suddenly. When the process is completed, the temperature of the oven should be reduced slowly in the same way and the oven should only be opened when it drops below 250 degrees. In this way, plastics do not catch fire. At the same time, bending and deterioration of the metal is prevented. Processing time may be longer for larger parts other than laser screens. Because the amount of waste plastic they contain is higher. It is important that the heat can circulate during the burning process, as in the ovens in the house where food is cooked. For this, a suitable space should be left between the parts subjected to the incineration process. In this way, the pollutant plastic removal process will be more successful.