Each lock contains a rotating cam. When turned with the correct key, the cam catches a pin in the next panel and pulls both panels together.
In short: the lock provides the pulling force; the shaped panel edges and compressed gasket create the seal.
The two halves of the joint
- Tongue-and-groove profile — aligns the panels and gives the foam cores a continuous path to meet, so there is no insulation gap.
- Eccentric cam latch — a rotating steel lever embedded in one panel edge that hooks a fixed steel pin in the adjacent panel and drags the two together.
The cams are internal and the steel skins are continuous, so a correctly locked joint leaves a flush, wipe-clean interior surface with a single visible seam.
The locking sequence on site
The sequence is short and needs only a hex key:
- Align the panels. Set two panels edge-to-edge so the tongue on one slides into the groove on the other.
- Insert the hex key. Each panel has small access ports that expose the internal cam.
- Turn the key. The cam rotates and hooks onto the steel pin in the neighbouring panel.
- Keep turning. The cam does not just latch — it pulls, dragging the two panels together with mechanical force, compressing the gasket and closing the gap.
What the tension does
The result is a joint held under constant tension — not adhesive that degrades, not screws that vibrate loose. That tension does three jobs at once:
- Closes the insulation. Pulling the tongue-and-groove fully home means the foam cores meet with no air gap, eliminating the thermal bridge that would otherwise leak heat and form condensation.
- Seals the joint. A pre-applied gasket in the groove is compressed to an airtight line, keeping humidity out and cold in.
- Locks the structure. The room becomes a single rigid shell that can later be unlocked and relocated with hand tools — no glue, no welding.
Related articles
- What is a cam-lock cold room?
- Cam-lock panel construction
- Why industry chooses cam-lock construction
- Panel specifications
- How cold rooms work: the physics of cold storage
Specifications reflect the MTH Algor panel system supplied by Frostbox. Custom dimensions and load ratings are available on request — contact [email protected].
