Die Dimension
Mechanical spacing within a female die dictates the distance between the two parallel steel walls forming the groove. This creasing channel width determines how much board material occupies the space during the fold cycle. Accurate calculation of this opening involves adding the thickness of the specific substrate to double the depth of the crease profile.
Proper setting prevents fibre fracture during the transition from flat sheet to finished box geometry.
Prozess Anwendung
Conversion lines require precise tool calibration to ensure the folding machine maintains structural integrity across long production runs. Operators adjust this gap to match the caliper and grain direction of the paperboard currently feeding through the platen press. Excessive clearance allows the sheet to shift unpredictably during the strike which results in erratic score lines and poor registration.
Tight settings cause extreme friction against the rule which leads to premature fibre rupture and board degradation.
Toleranz Anforderung
Dimensional stability at the folder gluer stage rests upon the consistent depth and geometry established by the initial creasing operation. Deviation by even a fraction of a millimetre alters the force required for the subsequent mechanical folding arm to complete the flap closure. Secondary processing equipment performs with greater efficiency when the score remains centered within the designed channel profile throughout the entire length of the production sequence.
Successful automated packaging requires perfect alignment between the female channel and the male steel rule to guarantee that the fold occurs at the exact location prescribed by the structural design.
