Interlocking board pieces can create compartments inside a carton. Supplying only outer dimensions leaves slot fit unresolved: tight slots slow assembly, while loose ones can let the divider move. This guide addresses paperboard and corrugated-divider cutting geometry, rather than ready-made divider supply.
Use actual thickness
The slot receives another board piece, so measured caliper and compression behaviour matter. Grammage alone cannot define slot width. Mark flute direction on corrugated parts, and avoid using a crushed sample as the material reference.
Separate slot width and depth
Width affects fit; depth affects the meeting height. In a simple equal-height cross divider, the combined depths relate to part height. Do not apply a half-depth rule to every design: different heights, bottom seating and upper edges require a specific assembly drawing.
Identify the complete part set
Give A/B part codes, quantities and entry directions. If one slot opens from the top and its mate from below, show that relationship. Include the carton’s internal dimensions, compartment spacing and product-contact zones in the same revision. One loose part does not demonstrate the complete set’s fit.
Review assembly without promising strength
Tearing, crushed flutes, slack and raised parts indicate different problems. The converter reviews the assembled set in the actual carton and uses those observations for die revision. A drawing alone cannot establish transport protection or load capacity.
Information for a die order
- A/B drawings and quantities
- Carton internal size and compartment arrangement
- Board thickness and flute direction
- Slot width, depth and assembly direction
- Assembled sample or photograph
Send your drawing and material details for the box divider cutting dies.
