On one occasion, when I was speaking on a course on compressive design and influencing factors analysis of cartons at the enterprise, I proposed a technical problem affecting the forming of corrugation to the decision-making level, management personnel, engineering technology, and first-line operators of the company. Corrugated Roller in the high problem. As a result, all managers are not aware of it. Only one operator knows a bit about it, but it is not clear what is going on. It can be seen that some companies do not pay enough attention to the technical training of employees. It can be imagined that such enterprises are difficult to analyze, solve and improve in the face of complaints against pressure or other technical issues.
I will briefly introduce the main technical requirements of the corrugating roller.
We know that corrugating rollers include a process of ironing, sizing, pasting, and compounding in the corrugating process. Corrugated paper in the high-speed, continuous savings of the iron bending process, the mesh between the upper and lower corrugating roller must have a certain amount of pressure, that is a certain role of line pressure, and the pressure is applied to Corrugated Cardboard Production Line both ends of the corrugating roller, the result is Corrugated Rollers will inevitably produce a certain degree of deflection (bending deformation, the Corrugated Line cross-sectional center of the line along the vertical direction of the line displacement), so that the gap between the middle part of the corrugated roller increases, the results of corrugated paper uneven force, there is open cardboard, etc. Quality issues.
In order to compensate for the problem of increased clearance due to bending deflection, corrugating rollers are manufactured with the center diameter slightly larger than the two ends cardboard corrugated roller. This difference is called mid-high. Visible, corrugated roller design has a certain high and medium is necessary, we engineering and technical personnel must have a certain understanding of it. Of course, the size of the middle height is calculated from the deflection curve using the material used, the wall thickness and the hardness of the roller.
In the actual production process, when the corrugated roll dome moves relative to one another, frictional squeezing occurs. The dome gradually grinds into irregular shapes or pits and depressions, and the rake tooth height gradually becomes lower, resulting in The thickness of the board gradually becomes thinner.
In addition, we also know that a certain width of corrugated paperboard production line cannot be full-width operation during normal use. Small-sized paper jobs often occur, resulting in inconsistent wearing of various parts. Therefore, When using narrow-width corrugated paper, it should be biased regularly to make the corrugating roll wear evenly.
Since we know the wear mechanism of the corrugating roller, we should try our best to slow down the wear and damage to the corrugating roller. For example, in the selection of corrugated paper, it is necessary to control the sediment content of the paper; narrow-width paper should try to use both ends of the corrugating roll and often exchange; always check whether the axis between the rolls is parallel, that is, the corrugated roll must be adjusted. The degree of parallelism; whether the corrugated roller has been relieved when it is idling; the size of the matching pressure must meet the process requirements for corrugating.
In addition, we must pay attention to the daily inspection and maintenance of the corrugated roller, such as cleaning and lubrication and refueling.
