Crease Profile
Folding endurance depends on score geometry to govern the structural integrity of paperboard packaging under mechanical stress. Die depth, channel width, and bead angle dictate the cross sectional deformation of cellulosic material during the converting operation. Caliper variations in the folding boxboard require proportional adjustments to the tooling configuration.
Excessive pressure fractures the internal fiber matrix and compromises the tensile strength along the hinge line. Insufficient depth produces an uncontrolled hinge migration that distorts the finished carton geometry during automated filling lines. Rotational velocity and moisture content interact directly with the tooling clearance to determine the final fold angle stability.
Channel Clearance
Substrate thickness dictates the dimensional parameters required for optimal creasing performance. Folding boxboard demands a precise mathematical ratio between caliper and groove width to prevent surface cracking. Material density dictates the compression threshold during the initial embossing stroke.
Tool wear alters the working tolerances over extended production runs. Die operators adjust the matrix depth to compensate for board elasticity and moisture fluctuations.
Bead Angle
Angular precision controls the springback forces exerted by the compressed fibers within the hinge cavity. Tooling geometry determines the permanent set achieved during the converting process. Carton rigidity relies on this permanent deformation to maintain square corners after gluing and sealing operations.
Production speeds influence the deformation rate of the paperboard matrix under sustained mechanical loads. Structural stability defines the load bearing capacity of the finished container throughout the distribution chain.
