Paper machine Stacking part Former: Several independent formers are superimposed on a long web. It is generally composed of 2-4 independent long mesh formers, each with its own sizing system and headbox. Used in the production of multi-layer cardboard. Make the current Z popular cardboard former. Arrangement of stacked mesh former: There are two types, 138 pages Figure 4-63C is a common arrangement form, compact structure, the length of the core network can be arbitrarily determined, and the low mesh can be greatly shortened. Interlayer bonding problem of stack screen former: to control the dryness of the bonded paper between 10-14%: the over-dry bonding strength is low, and the over-wet paper page is easy to destroy; Control the pressure of the composite roller on the paper web and the vacuum degree of the vacuum box: the composite roller is a hole roller, the pressure is too small and the combination is poor, and the mesh marks are generated too large; Spray starch glue on the joint. Transmission problem: control the speed difference and distribute the load correctly. Features: Compared with the garden mesh paperboard machine: it has the advantages of good uniformity, small quantitative difference of banner, small vertical and horizontal tension ratio, and high speed. But the investment is large and the operation requirements are high; Compared with the super-shaper cardboard machine: the reproducible dosing and speed range are large, which can adapt to higher vehicle speeds, but the investment is large.