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EVF70001

Interlocking Cell Partition

Available in a wide range of custom configurations & material selection.
Order 1 sample. Or order 100K+ units. Or anything in between.
Affordable delivery across North America.
Design support, warehousing, testing, assembly available.
Widest machinery capability in America via 30+ specialist partner plants.

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Product details

Top highlights

Multi-piece friction-fit assembly
Requires manual grid construction
Slot widths depend on board thickness

About this product

This multi-piece interlocking partition creates a rigid, freestanding grid of individual cells to separate and protect fragile items inside a master carton. Built from separate longitudinal and transverse strips that slide together at 90-degree angles, it prevents glass-on-glass contact, scuffing, and product migration during transit.

Because the grid is assembled piece by piece on the packing line, it offers customizable cell sizes and dense packing arrangements. It requires more manual labor than pre-glued or single-piece folding dividers, making it a better fit for specific fulfillment setups.

Common uses

Glass bottle shipping
Cosmetic vial organization
Electronic component isolation

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Size and quantity

Detailed dimensions

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Individual cell length

Individual cell width

Partition height

Grid layout

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Materials and print

Paperboard preference

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Paperboard details

Print and artwork

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Shipping or storage context

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Product isolation and separation jobs

Glass and fragile bottle isolation

The rigid grid prevents bottles, jars, or vials from clinking together and breaking during transit. When sized correctly, the cells hold each item securely upright.

Cosmetic and personal care organization

For multi-item kits or bulk shipments of small cosmetics, paperboard partitions keep individual cartons or tubes separated and free from scuffing.

Precision component separation

Industrial parts, electronics, or machined components that are sensitive to friction can be isolated in custom-sized cells, ensuring they arrive without surface damage.

Confectionery and baked goods

Food-safe paperboard grids keep delicate items like truffles or pastries separated, preventing them from crushing each other inside a retail or shipping box.

High-density packing environments

High-density master packing

When shipping many small items in a single outer carton, this partition style maximizes space efficiency by creating shared walls between every product.

Manual fulfillment operations

Because the strips are delivered flat and slotted together by hand, this insert makes the most sense for packing lines equipped for manual kitting and assembly.

Variable product assortments

Brands packing different combinations of items can use adjustable cell sizes to create a custom grid that fits specific kit requirements without changing the outer box.

When to evaluate pre-assembled or single-piece dividers

High-speed automated packing

If the fulfillment line is not set up for the time required to manually build a grid piece by piece, it is worth evaluating pre-glued collapsible partitions or single-piece folding dividers that open in one motion.

Single-item protection

If the goal is to protect only one or two items, a custom die-cut insert or a folded roll-end tray may provide better targeted retention with less assembly effort.

Material, fit, and assembly choices

Board thickness and slot width

The slots cut into the strips need to match the thickness of the chosen material. If the specification changes from a thin paperboard to a thicker corrugated flute, the slot width should be adjusted so the pieces do not tear or bow during assembly.

Paperboard versus corrugated board

Paperboard is excellent for small, lightweight items and offers clean, dust-free edges. Corrugated board provides more cushioning for heavy glass but requires wider slots and careful die-cutting to ensure the narrow slot waste is fully stripped.

Outer carton sizing

The assembled partition has a specific footprint. The internal dimensions of the master carton should be sized to accommodate the full length and width of the grid, plus a small tolerance for easy insertion.

Grain direction for longer strips

For partitions with long longitudinal strips, aligning the material grain horizontally helps prevent the strips from bowing or warping, keeping the grid square and easier to assemble.

Cell sizing and assembly adjustments

Cell count and dimensions

The length, width, and height of the individual cells can be adjusted to fit the exact product, and the total number of cells in both directions can be scaled to match the master carton.

Tapered slot entries

The top edges of the slots feature a slight taper. This small angle acts as a guide, making it much easier for packers to align and slide the intersecting strips together quickly.

Slot depth and flush edges

The slots are cut to exactly half the height of the partition. When fully seated, the top and bottom edges of all intersecting strips align to create a flat, even grid.

Packing details

Die-cutting and stripping waste

Manufacturing this partition requires cutting many narrow slots. Clean ejection of this waste is essential. If waste pieces remain trapped in the slots, manual assembly on the packing line will slow down.

Perimeter and frame options

Perimeter frames

Some partition styles include an outer framing strip that wraps around the entire grid, providing an extra layer of buffer between the outer cells and the master carton.

Additional notes

Packing line labor considerations

Building multi-piece grids is labor-intensive. For high-volume runs, the material efficiency of this flat layout should be weighed against the time spent assembling it on the floor.

Grain direction and bowing

For longer partition strips, aligning the material grain horizontally helps prevent the strips from bowing or warping, ensuring the grid remains square and easy to assemble.

FAQs

How is this partition delivered and assembled?

It is delivered flat as separate longitudinal and transverse strips. Packers manually align the slots and push the strips together at 90-degree angles to build the grid before or during loading into the master carton.

Can this partition be made from corrugated board?

Yes, but the template should be adjusted. The slot width needs to match the thicker corrugated caliper, and the die-cutting process should be carefully managed to prevent crushing the flutes at the intersection points.

Does this partition protect against drop impacts?

It prevents items from striking each other laterally and adds vertical stacking strength to the master carton. However, it relies entirely on the outer box and any top or bottom pads for external impact protection.

Do the strips sit flush when assembled?

Yes. The slots are cut to exactly half the height of the partition. When fully seated, the top and bottom edges of all intersecting strips align to create a flat, even grid.

What prevents the grid from falling apart?

The partition relies on a precise friction fit. The slots are sized to grip the intersecting board tightly enough to hold the grid together during handling, without being so tight that they tear during assembly.

How do I determine the right cell size?

Cells should be sized slightly larger than the maximum diameter or width of the product to allow easy insertion, but tight enough to prevent excessive rattling or migration during transit.

Does this partition require glue or tape?

No. The entire grid is held together by the interlocking friction fit of the slotted strips. No adhesive is needed for assembly.

What happens if the slot width does not match the board thickness?

If the slots are too narrow, the board will tear or crush when pushed together. If the slots are too wide, the grid will be loose and may fall apart during handling.