Due to the increase in manpower costs as well as the market's need for monochrome and multi-color printing, in 2014, a fully automatic machine for printing, cutting and sewing bags in three sizes, normal, wide and extra wide, was designed and built. One of the unique features of this machine is the constant rotation speed of the cliché cylinder (proportionate to the speed of the cutting and sewing section), which is in contrast to existing prints, because in these machines, the cliché cylinder has a short stop when printing each bag, and this Stopping will make part of the print on the bag fade. Considering that in this machine, the movement of the stereotype cylinder is uniform and continuous, the printing quality is very high and due to the use of anilox rollers, not only is the quality higher than the roll-to-roll printing available in the market, but the consumption of paint and solvent in It has decreased significantly. Due to the use of complex mathematical equations, the software of the device is designed in such a way that all steps are performed automatically and eliminates the need for skilled human resources. Also, when it stops - which sometimes happens due to the breaking of the spinning thread, bag weaving, or according to the need - the system completes the last print, and when restarting, after making the ink uniform, it transfers the new print to the bag. So that there will be no printing waste such as lack of printing or lack of color. The ink consumption in this system has been reduced to such an extent that the printed bag is completely dry when it reaches the cutting area. At the same time, due to the lack of need to stop the cliché cylinder - which has a lot of inertia - a motor with 30% power of the same model has been used, which significantly saves energy consumption and the initial cost of the device. Among the advantages of this device, the following can be listed:
• No need to change the cylinder for different bag lengths
High print quality due to the cylinder not stopping
• High accuracy in cutting the length of printed bags
Ability to turn off the printing unit to cut and sew plain and printed rolls
• Ability to print and cut up to 180 cm length
• Ability to simultaneously print on the back and on the bag
• Ability to upgrade the printing department to add a second (color) printing unit
• 50% reduction in human labor
60% saving in paint consumption, due to the use of anilox rollers
Equipped with pump and color circulation system
Automatic setting of parameters with the help of complex mathematical calculations
Equipped with PLC, HMI, inverter and Delta servo motors
• Complete elimination of print waste when stopping and restarting
Esfahan
