One of the characteristics of micro corrugations is the large number of flutes, the light weight of corrugated base paper and the low strength. Take the number of flutes per 300 mm as an example: G type is 185 ± 12, N type is 200 ± 15, O type is 267, and B type is 50 ± 2. For a pair of Corrugated Rollers with the same diameter, the number of fine corrugated corrugations increased by 3 to 5 times compared to B-type corrugations. It can be seen that the tension during paper feeding and forming increases exponentially. Therefore, the design of the corrugated shape must ensure that the value of the corrugated angle of the corrugated shape is within the strength of the corrugated base paper. The choice of the arc of the corrugated top must make the entry resistance during the formation of the corrugated base paper smaller, smoother and smoother. At the same time, the corrugated angle must make the corrugated structure meet the sufficient rigidity and mechanical strength of the micro-corrugated cardboard. The corrugated surface of the micro-corrugated Corrugated Roller requires higher roughness requirements, and must be finely ground and polished to ensure high-speed forming of corrugated base paper with low grammage and low strength.
Basic corrugated parameters of micro corrugated:
Flute type EFGNO other
Corrugated UV UV UV UV UV UV
Lens / 300mm 90 ± 10124 ± 10185 ± 12200 ± 15267 Design
Design of flute height 1.1 ～ 1.50.7 ～ 0.80.5 ～ 0.650.4 ～ 0.50.25 ～ 0.35
Shrinkage 1.29 ～ 1.391.22 ～ 1.261.20 ～ 1.251.15 Design 1.14 Design Design
For the production of fine corrugated corrugated rollers and related moving parts such as pressure rollers, rubber coating rollers and metering rollers, higher motion accuracy is required. Corrugated rollers and pressure rollers must also have more uniform and consistent forming and compound linear pressure to ensure Cardboard quality. Therefore, the wall thickness of the corrugated roller and the pressure roller must be uniform, and the accuracy of the cylindricity can be maintained after heating. At the same time, a reasonable design of the structure of the condensate drainage system is required to ensure that the corrugated roller does not stop due to water accumulation at the bottom To the temperature difference between the upper and lower to produce bending deformation. Corrugated rollers and pressure rollers must have more reasonable and high accuracy with consistent line pressure. The height of the micro corrugation is very low, and the wear of the corrugation height exceeding 0.1 mm will affect the quality of the product. For the corrugated roller of the micro corrugation, a more wear-resistant surface layer quality is required.how corrugated sheets are made?
The flute form of the fine corrugated corrugated rollers, the vacuum external suction type and the positive pressure air cushion type are annular grooves, the vacuum internal suction type has annular grooves and herringbone semi-circular arc suction grooves. The flute of the corrugated roller with fine corrugation needs to be narrower to ensure that the finished product is not prone to degumming at the location of the flute.
