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EVC70022

Corrugated Grid Partition (Automatic Cell Sizing)

The EVC70022 corrugated grid partition is a multi-piece interlocking insert used to separate and organize individual items within a master carton. By isolating each product in its own cell, it helps reduce surface scratching and clinking during transit.

Delivered flat as a set of slotted longitudinal and transverse strips, the grid is assembled at the packing station. The interlocking design separates the contents and can add vertical compression support to the outer shipping box.

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  • Available in a wide variety of configurations.

At a glance

  • Ships flat as dense bundles of slotted strips
  • V-notch slot openings help guide assembly
  • Can add vertical compression support to the master carton

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Common Uses for Grid Partitions

Beverage and Glassware Packing

Isolates bottles, jars, and glasses to help reduce glass-to-glass contact. The corrugated walls provide separation against lateral impacts during courier or pallet transit.

Industrial Component Kitting

Organizes machined parts, electronics, or hardware into easily countable grids. Helps keep heavy or sharp components separated.

Cosmetics and Fragrance

Separates primary packaging like vials and tubes. Often produced in thinner flutes (like E-flute) to increase the number of cells in a small master carton.

Automotive and Mechanical Parts

Separates identical machined parts, bearings, or small assemblies that need to be counted quickly and kept apart during bulk shipment.

Packing Environments

High-Volume Fulfillment

For large-scale operations, these partitions can be erected by automated partition inserters, when the corrugated board is flat and the slots are cleanly stripped.

Manual Packing Lines

For hand-packing, the V-notch lead-ins on the slots help operators align and slide the intersecting strips together.

Returnable or Closed-Loop Transit

For internal plant-to-plant shipping where the same master carton and grid are reused multiple times to move work-in-progress components.

When to Consider Alternative Inserts

When packing very few items

If you are only separating two or three items, a simple folded divider or a die-cut tray insert may need less assembly labor than a full interlocking grid.

When presentation is the primary goal

While corrugated partitions are protective, luxury retail presentations often use paperboard or foam inserts for a cleaner, dust-free aesthetic.

Key Specification Decisions

Master Carton Fit

The overall length and width of the assembled partition should be slightly smaller than the internal dimensions of your outer box so it drops in easily without bowing.

Board Grade and Flute

E-flute is common for small, lightweight items and dense packing. B-flute or C-flute offers more cushioning for heavier items but needs wider interlocking slots and takes up more space inside the box.

Cell Count and Clearance

Determine the number of items per box. The cell dimensions should allow enough clearance for the product to slide in easily without being so loose that the item rattles.

Assembly Method and Labor

Deciding whether the volume justifies an automated partition inserter or if the grid will be assembled by hand changes how the slot chamfers should be cut.

Structural Adjustments

V-Notch Lead-Ins

The angled cuts at the opening of each slot can be adjusted. Wider chamfers make manual assembly faster, while narrower ones may be preferred for specific automated equipment.

Slot Width Calibration

The width of the interlocking slots should be matched to the chosen board thickness. If the board changes, the slots should be recalculated to prevent the grid from binding or being too loose.

Height Clearance

The partition can be cut shorter than the master carton to leave room for top pads, literature, or top-loading clearance.

Packing details

Vertical Compression Support

Because the intersecting strips stand on edge, a fully assembled grid can act as a structural column inside the master carton, which can increase the box's ability to support top loads on a pallet.

Additional notes

Slot waste and stripping

Clean manufacturing is important for partitions. Any hanging scrap left in the slots during die-cutting will block the strips from sliding together smoothly.

Related Inserts and Dividers

FAQs

Do these partitions need glue or tape?

The strips lock together mechanically using friction and the depth of the intersecting slots. They are dropped into the master carton as a single assembled unit.

Can these be assembled by machine?

Specialized partition inserters can automate the assembly and insertion process for high-volume runs. This relies on strict tolerances for board warp and clean slot cutting.

How is the cell size determined?

For this specific style, you provide the overall internal dimensions of your master carton and the number of cells needed in each direction. The individual cell size is then calculated automatically.

Can I use heavy double-wall board for these dividers?

While possible, double-wall board makes the interlocking slots very wide and increases friction during assembly. It is usually reserved for extremely heavy industrial parts.

How are the partitions delivered?

They are delivered completely flat as dense stacks of individual strips (longitudinal and transverse). This makes them extremely space-efficient for shipping and warehouse storage.

Can the partitions be shorter than the master carton?

Partitions are often designed to be slightly shorter than the outer box to allow clearance for the top flaps to close, or to accommodate a top pad for extra protection.

Can the grid be printed?

The corrugated board can be printed before die-cutting. However, since it is an internal component, it is usually left plain unless used for a retail presentation where the consumer opens the master carton.

What happens if the board thickness changes after the initial design?

The slot width should be recalculated. If the board gets thicker, the slots will bind during assembly; if thinner, the grid may be too loose and fail to stay square.

Keep your fragile products separated and organized with a fitted corrugated grid.