The pile turner machine, also known as the paper stack turning machine or the paper turning machine, has functions including turning paper piles, pallet changing, waste removal, air blowing, removing impurities, drying, aligning paper stacks, and is used as follows:

Use before printing:
1. It can remove paper lint, paper scraps and other impurities, improve the surface quality of the paper to be printed, and reduce the possibility of double feeding;
2. Due to the improvement of paper surface quality, printing press speed can be increased by 3-5%, which improves labor productivity;
3. Greatly reduce the entry of paper wool, paper scraps and other impurities into the printing machine, and extend the life of the printing machine;
4. The waste products and defective products caused by impurities such as paper wool and paper scraps are greatly reduced, which can increase the yield of 2-3%.

Used after printing, transfer station, paper cutting and die cutting:
1. It can remove powder spray, speed up ink drying, and quickly reduce the odor of printed sheets due to ink solvents (this is very important for food packaging);
2. Prevent the occurrence of quality problems such as sticking and smearing on the back;
3. Easy to exchange the system pallets to wooden pallets which are more frequently used for delivery. By inverting the whole pile 90 degrees, the operators can easily take out the old ones and insert a new one, save a lot of manpower.

Therefore, sheet-fed printing plants in European and American countries generally have several pile turner machines to cleaning their paper pile before printing and dry the ink and change pallets after printing.

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