Carton with crash-lock bottom

Folding carton with a tuck flap at the top and a pre-glued crash-lock bottom that closes by itself when erected.

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Dieline: Carton with crash-lock bottom — 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	60 mm	20–200 mm
Width	40 mm	20–200 mm
Height	150 mm	20–200 mm

Parameters of this construction

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

Parameter	Default	Range	Note
Glue flap`glueFlap`	15 mm	8–25 mm	Width of the glue flap used to glue the blank into a tube. The material requires a minimum width.
Glue flap angle`glueFlapAngle`	12°	0–20°	Bevel at the ends of the glue flap; facilitates folding and erection.
Tuck depth`tuckDepth`	15 mm	10–30 mm	How far the tuck flap reaches into the box; at most approximately half the width (the height for the mailer).
Tuck flap radius`tuckRadius`	4 mm	0–10 mm	Corner radius of the tuck flap; limited by half the flap width or tuck depth.
Tuck flap shoulder`tuckShoulder`	3 mm	2–6 mm	Side inset of the tuck flap relative to the lid, allowing easy insertion.
Dust flap length (ratio)`dustFlapRatio`	80 %	50–95 %	Dust flap length as a ratio of the available length.
Dust flap angle`dustFlapAngle`	20°	0–45°	Bevel of the dust flaps (also the ears on the mailer); larger angles prevent collisions during folding.
Bottom wing overlap`wingOverlap`	10 mm	2–40 mm	Overlap of the folding wings in the closed crash-lock bottom.
Lock style`lockStyle`	hook	hook · none	Lock shape in the crash-lock bottom: hook or no lock.
Hook step`lockStep`	6 mm	2–20 mm	Step of the hook contour; at least half the overlap, at most as much as the opening allows.
Glue field width`glueFieldWidth`	5 mm	3–15 mm	Width of the glue field on the bottom wings' flap.
Glue field gap`glueFieldGap`Expert	2 mm	1–5 mm	Distance of the glue field from the diagonal crease and flap edges; at least the material thickness.

Assembly

At the factory: fold bottom wings back at the diagonal creases, apply adhesive to glue fields, lay the body flat, and glue the glue flap. At the customer's site: erect the body – the bottom closes by itself. After filling, fold in the dust flaps and insert the tuck flap.

Grain direction

Grain direction parallel to height (check)

Reference note

ECMA family, unconfirmed

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

What is automatic about the crash-lock bottom?

The prepared bottom closes as the flat body is erected. For this, the bottom wings must first have been folded and glued at the factory. The construction does not eliminate this preparation step. Check the complete workflow from pre-gluing to filling with the selected board.

Can I use the bottom without pre-gluing?

The assembly instructions assume glue fields and factory pre-gluing. Without this preparation, the intended automatic workflow does not occur. If you need a bottom without gluing, the snap-lock bottom is a different construction in the catalog. You must check its flaps and folding sequence separately.

Which board is the example based on?

The documented starting example uses folding carton board 400 g/m². Basis weight alone, however, determines neither thickness nor creasing behavior. The profile is not calibrated. Agree on material, creasing, and gluing with the print shop and check the bottom on a sample made from the target material.

What is the bottom's load capacity?

No reliable weight specification is available for this page. The geometry describes bottom wings and glue fields but does not test the strength of the eventual bond. Product weight, adhesive, and board must be tested together. Prototypes in three sizes and their documented results are still pending in the catalog.

Which reference may I cite?

For this template, the public reference remains ECMA family, unconfirmed. It provides orientation and is shown without a letter code. No standard texts or standard drawings are reproduced. The original parametric construction and confirmation by a technical partner are separate steps; confirmation is still pending.

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