Studio ready
A clean, versatile carton with tuck closures on the same side.
Skincare · Soap Bars · Supplements
Customize this box
Studio ready
Retail & Folding Cartons
Auto-Lock Bottom
Also known as Crash Bottom
A carton with a pre-glued base that locks into place as you open it.
Good for
- High-Volume Packs
- Subscription Fulfillment
- Vitamins
Structure
- Pre-Glued Base
- Pops Open Instantly
- Premium Stacking
Material guidance
Folding boxboard such as 18 to 24 pt white SBS or kraft suits this structure. Confirm board weight with your manufacturer for heavier products.
Current size: 70 × 70 × 140 mm. Production engine geometry; have your manufacturer approve it before cutting.
The structure, unfolded.
Change the size and the dieline redraws.
- Cut lines
- Fold / crease
- Perforation
- Bleed guide
How a auto-lock bottom is built
A tuck-top carton with a crash-lock (auto) bottom. The four bottom flaps are partly glued during manufacture so that when the flat carton is squared, the bottom springs into place and locks. It ships flat and sets up in one motion.
Putting it together
- 1Take the flat carton and push the two folded edges towards each other.
- 2The bottom drops and locks automatically.
- 3Load the product and close the top tuck.
Measuring for this style
- Length (L)
- The inside width of the front panel, left to right.
- Width (W)
- The inside depth from front to back: the width of a side panel.
- Height (H)
- The inside height from the base to the top opening.
All sizes are inside dimensions. Add 1 to 2 mm of clearance around the product. How to measure
When to choose it
Pick it for heavier retail products and fast packing lines, such as bottles, jars and electronics. For light products a reverse tuck end is cheaper.
Before you print
- The bottom gussets are glued at the converter; the dieline needs glue areas marked.
- Very tall, narrow cartons may need a deeper bottom flap to lock firmly.
- Keep text and logos 3 mm inside every crease so folding does not crack the print.
Questions
Auto-Lock Bottom FAQs
Short answers about sizing, board and files for this style.
What size should I enter for a Auto-Lock Bottom?
Enter inside dimensions in millimetres, centimetres or inches. Length: the inside width of the front panel, left to right. Width: the inside depth from front to back: the width of a side panel. Height: the inside height from the base to the top opening. Measure the product at its widest points and add 1 to 2 mm of clearance (3 to 5 mm for rigid boxes).
Which material is best for a Auto-Lock Bottom?
Folding boxboard such as 18 to 24 pt white SBS or kraft suits this structure. Confirm board weight with your manufacturer for heavier products.
How is a Auto-Lock Bottom put together?
Take the flat carton and push the two folded edges towards each other. The bottom drops and locks automatically. Load the product and close the top tuck.
Can I download a Auto-Lock Bottom dieline?
Yes. Open the Auto-Lock Bottom in PW Studio, set your size and board, and export a print-ready PDF, SVG or DXF with cut, crease and bleed lines on separate layers. It is free and needs no account.
What else is a Auto-Lock Bottom called?
It is also known as Crash Bottom. Pick it for heavier retail products and fast packing lines, such as bottles, jars and electronics.
More folding cartons
- Studio ready
An everyday folding carton with the top and bottom tucks on opposite sides.
Cosmetics · Vitamins · FMCG
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- Guide dieline
A tuck-top carton whose bottom flaps interlock to carry heavier products.
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- Studio ready
A tuck lid on top and an automatic locking base underneath for quick packing.
Premium Drinks · Perfume Packs · Specialty Food
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