Postpress technology: how to solve the problem of the position of the paper
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Color box crepe paper will cause problems such as sticky, dirty and die-cutting on the surface, and it is also one of the most difficult problems in the crepe paper process. The following small series will provide a solution to this problem.
(1) When the face paper of the color paste is thin and curled, the speed of the machine cannot be driven too fast.
When loading paper and corrugated paperboard, their left and right relative positions should be aligned to avoid lateral misalignment due to paper exit positioning. If the stroke of the upper and lower chains of the machine is not adjusted, there is a deviation between the front and rear positions; the paper stopper of the stacking table does not lean against the paper edge, so that the paper stack is tilted left and right, and the curled cardboard is not soft when loading paper. Pinghe does not take the cardboard neatly, etc., and it will cause errors in the position of the paper and corrugated board.
(2) Improper adjustment or maintenance of the machine feeding and positioning mechanism can also cause errors in the face paper and corrugated board.
a. There is looseness in the paper feeding chain mechanism, which makes the working coordination of the upper/lower chain inconsistent or unstable;
b. The front gauge on the upper/lower chain is loose, which causes the paper edge to collide when feeding paper;
c. The contact position of the paperboard strip opposite paper is not suitable or the gap is too large, which does not play a role in slowing the inertial force of the cardboard during high-speed movement;
d. The upper/lower rolling roller does not clean and accumulate a certain amount of glue, which prevents the synchronous rolling conveying of the paper or corrugated cardboard.
(3) The gap between the upper/lower rolling roller of the machine is not suitable and the paper feeding error caused by poor paper feeding
When the gap between the upper and lower rollers is unsuitable, the corrugated cardboard after the tamping is subjected to the displacement between the upper paper and the corrugated paper after passing through the upper and lower rolling rollers.
If the surface paper is not properly transported, it may cause foaming or debonding (the length of the paperboard on the conveyor belt is different, the unevenness of the paper is uneven) and the quality is not allowed.