When many friends use the die-cutting machine, they find that the accuracy is sometimes reduced. What is the cause of this phenomenon? How should we solve this problem? The following small series will give you an analysis.
First, the upper die cutting or the lower die cutting position is not allowed. Long-term use of the machine will cause the positioning block on the die-cut frame or the die-cut substrate to wear out, so that the matching clearance is too large and the die-cutting precision is lowered. The positioning block should be replaced at this time. The wear of the side positioning plate is an important factor that causes the side positioning to be inaccurate. Since the amount of plucking of the positioning is insufficient to compensate for the good wear, the side positioning accuracy is deteriorated. The side positioning plate should be replaced at this time.
Second, the positioning distance of the front and rear positioning pendulum is too small. Because the length of the chain itself has a certain error, if the positioning distance is too small, the chain error cannot be eliminated in the front and rear positioning, thereby affecting the die cutting precision. At this time, the cam position of the adjusting screw of the front positioning pendulum or the rear positioning pendulum should be adjusted, so that the front and rear positioning frame can move the distance of the tooth row by 2 mm to 3 mm.
Third, the pressure of the gripper is too small or uneven. If the movable tooth elasticity of the gripper becomes small due to long-term use, it will cause the paper to slip or fall off during the transfer process, which directly affects the die-cutting precision; uneven pressure between the grippers may cause the paper to be die-cut. Skew in the process. The active tooth should be replaced at this time. In addition, the fixed teeth should also be consistent in level. Otherwise, it may also cause paper collision or paper wrinkling after creping, which affects the precision of die cutting.
4. During the process of conveying the cardboard, the main drive chain wears and stretches, which will directly affect the positioning accuracy before die cutting. Replace the chain at this time. The intermittent mechanism wears, causing the tooth row to shake during the stop or start process, and also affects the die cutting precision. In this case, generally only the positioning accuracy is affected. At this time, it is necessary to perform maintenance in time.
The above four points are the mechanical reasons for the low precision of the die-cutting machine. The maintenance and repair personnel are required to maintain the machine and check and repair it in time to ensure the best operation of the die-cutting machine.