1. Adjustment of the pressure brush assembly.
The center of the marking brush is aligned with the label, and it is symmetrical on both sides. The marking brush is perpendicular to the container surface. The overlap clearance when the pressing brush sweeps across the container is: 10–15 mm for a single pressing brush, and 5–10 mm for a combined pressing brush. The distance between the cleaning brush and the sponge is 1–2 mm. Adjustment of the bottle‑pressing head: when no bottle is present, the bottle‑pressing head should be 20 mm lower than when a bottle is in place.
2. Adjustment of the label box.
The centerline of the label box, the central axis of the labeling station, and the label paper should all be tangent to one another. The central axis of the label plate must align with these two points; adjust so that the label plate is tangent to the label paper (at zero clearance), then move the label box inward by 1–2 mm. The gap between the label paper and the side pressure strips in the label box should be maintained at 0.8–1 mm: too large a gap can cause the label paper to shift within the box, resulting in skewed labeling, while too small a gap may impede smooth label feeding. Adjustment of the label‑gripping hook position: ensure that the upper and lower as well as the left and right gripping hooks lie in the same vertical plane and apply even pressure to the label paper; this will enable reliable label pickup. Adjustment of the label‑supply roller: with no label present, the label‑pressing plate should be able to press against the very front edge of the label box; when a label is loaded, the label near the hook should not be damaged or crushed.
3. Adjustment of the in-bottle star wheel, the out-bottle star wheel, and the in-bottle screw rod.
When adjusting the infeed and outfeed bottle star wheels and the infeed bottle screw rod, use the machine’s bottle‑pressing head as the reference. First, adjust the infeed star wheel: when the pressing head just contacts the bottle, fine‑tune the star wheel so that the bottle is centered in the star wheel’s groove. For the infeed screw rod, take the infeed star wheel as the reference; with the bottle positioned exactly at the center of the star wheel’s groove, adjust the screw rod so that its infeed side presses firmly against the bottle without causing any displacement. Finally, for the outfeed star wheel, adjust it so that, as soon as the pressing head lifts, the bottle is centered in the star wheel’s groove.
4. Adjustment of the benchmark station.
Adjustment of the doctor blade and the rubber roller: There must be no gap between the doctor blade and the rubber roller along their entire length. If a gap exists, it can be corrected by adjusting the eccentric bolt on the doctor blade. Adjustment of the coating plate and the rubber roller: The coating plate and the rubber roller are in contact only, with no applied pressure. If the gap is too large, excessive adhesive will accumulate on the coating plate, leading to adhesive splatter. If the gap is too small, the contact becomes overly tight, squeezing out the adhesive and leaving one half of the coating plate without adhesive. Practical experience shows that an optimal gap of 0.1 mm to 0.2 mm between the coating plate and the rubber roller is ideal. This can be achieved by adjusting the bearing housing at the lower end of the rubber roller; if necessary, the bearings at the upper end of the rubber roller should also be fine-tuned.
