The trademark paper folding mechanism on the YB43 hard packer uses cam-and-linkage motion to fold multiple sections of the trademark paper at fixed phases, forming the cigarette pack outer box to a standardized shape.
Overall process
After the outer box wraps the cigarette pack and the box is formed and dried, the pack enters the trademark paper folding stage. The mechanism folds the two inner side edges, the lower bottom edge, the front face, and the outer side edge in sequence. The pack then moves to the next stage fully formed.
Core principle of the upper bottom edge fold
This section uses a cam-linkage control mechanism working with a folder component, held in a fixed phase relationship with pack travel.
The pack moves from 0° to 180° of the machine cycle to reach the position below the folder, and dwells from 180° to 360°.
Once the pack dwells, the locating block positions the trademark paper first, then the folder moves down. The locating block stays engaged from 180° to 240°.
Cam rotation drives the linkage and swing arm, which moves the folder through the fold. The folding stroke is made to the trademark paper bottom width, and the design as a whole matches the cam phase parameters.
Motion details
The mechanism uses a disc cam as the core drive part, mounted on the machine main shaft.
The fork linkage runs perpendicular to the main shaft and to pack travel. A bearing at its top engages the cam, and its lower end connects to a main shaft slider. As the cam rotates, the fork linkage moves up and down in the slider groove.
The fork linkage connects to the lower end of the link through a connecting plate with a long hole. Adjusting the link up or down changes the swing arm angle.
The upper end of the link connects by pin to a horizontal swing arm. The swing arm has a long hole at its middle and is fixed by a slotted connecting block and an M8 screw. The end of the swing arm connects by pin to a fixed seat on the machine body, pivoting on the seat bore.
Loosening the M8 screw and the fixed seat locking screw allows precise adjustment of the fold position. Disc cams, fork linkages, swing arms, and connecting blocks can be machined to customer drawings, for single pieces or small batches, with material and heat treatment specified by the drawing.
Beyond these parts, our precision component machining capability also covers non-standard parts for tobacco packaging machinery, food packaging machinery, and pharmaceutical packaging machinery, as well as precision structural parts for yachts and RC race cars. Hansheng Automation machines single pieces or small batches to customer drawings, with material, tolerance, and surface finish specified by the drawing.
