Folding tray with lock corners

Corrugated folding tray: bottom, front and back walls with corner flaps, double end walls with lock corners; no gluing.

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Dieline: Folding tray with lock corners — Vector preview from the catalogue, default dimensions

Dimensions and limits

Default dimensions of the template and the permitted range in mm.

Dimension	Default	Range
Length	300 mm	60–600 mm
Width	200 mm	60–600 mm
Height	80 mm	20–250 mm

Parameters of this construction

7 parameters with default value and limits, adjustable in the editor.

Parameter	Default	Range	Note
Rim width`rimWidth`	10 mm	4–20 mm	Width of the double wall's foldover (crease to crease); accommodates the flaps in the pocket.
Flap gap`flapGap`	5 mm	1–12 mm	Gap between neighboring flaps or walls; at least approximately the material thickness.
Ear length (ratio)`earRatio`	80 %	50–95 %	Length of the ears or corner flaps as a ratio of half the inside width.
Number of lock tabs`lockTabCount`	2	1–4	Number of locking tabs per wall.
Lock tab width`lockTabWidth`	25 mm	10–60 mm	Width of a locking tab.
Lock tab depth`lockTabDepth`	8 mm	3–15 mm	How far a locking tab protrudes; at least material thickness plus clearance.
Bottom slot width`slotWidth`	5 mm	1–10 mm	Width of the slots in the base for the locking tabs; at least the material thickness, with clearance from the crease.

Assembly

Erect the front and back walls and fold the corner flaps inward. Erect the end walls over them, fold the turn-in inward so the corner flaps sit in the pocket, and insert the locking tabs into the bottom slots.

Grain direction

Grain direction vertical on the blank (check)

Reference note

Reference classification still pending

Labels such as “similar to FEFCO” or “ECMA family, unconfirmed” are for orientation only. The templates are our own constructions; an assignment to a standard code is unconfirmed and not a trademark claim.

Frequently asked questions about this template

Does the tray need a glue flap?

No. The corner flaps sit in the pockets of the double end walls. The inner wall tabs lock into the bottom. This structure replaces corner gluing in this template. Check engagement and wall alignment on the target material; the calculated blank alone confirms neither retention force nor load capacity.

What changes with V2?

V2 uses a 10 mm turn-in width and 5 mm bottom slot width instead of the starting values of 8 mm and 6 mm in V1. The catalog states that this removes the crease spacing finding MFG-005 in the starting example. Warnings at locking tab roots remain possible. Explicitly use the same template version and material profile when comparing.

Can I add more locking tabs?

lockTabCount offers one to four locking tabs per wall. More tabs require space, as do their width and spacing. lockTabWidth.fitsInnerWall checks this combination. Change count and width together and check on the sample that all tabs engage the bottom slots simultaneously without deformation.

Why can't the bottom slot be arbitrarily wide?

The slot must accommodate material thickness while maintaining clearance from the wall crease. slotWidth.materialMinimum.caliper and slotWidth.atMost.clearOfHinge check both limits. Simply increasing slot width can weaken the lock. Check tab fit at the selected turn-in width on the real corrugated blank.

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