How much clearance does a robot protective box need?

Answer: 3 mm around each part and 10 mm of depth for compression. Less will not close; more and the part moves.

What wall thickness suits drive boards?

Answer: A 3.2 mm wall with 1.8 mm ribs at 80 mm centres. At 2.4 mm the panel bulges and the dust rating falls.

How do IP65 and IP67 differ?

Answer: Immersion. IP65 stops spray at 25 percent compression; IP67 needs one metre for 30 minutes, an 8 mm section, 30 percent.

EVA or EPDM for the insert?

Answer: EVA at 35 kg per cubic metre for most small boxes; EPDM where oil or outdoor exposure is expected, at 10 to 20 percent more cost.

How is colour controlled across hundreds of boxes?

Answer: One grade, one masterbatch lot, three hours of drying at 80 degrees Celsius, five boxes compared for ΔE.

How to Choose a Robot Protective Box: Five Decision Points

Quick answer: Judge a robot protective box by cavity layout, then wall thickness and stack load, then seal and inspection. A box for a pendant and two drive boards runs 420 by 320 by 180 mm at 3.2 mm wall and holds 55G on a 1.2 m drop.

Layout of the Robot Protective Box Cavity
Wall Thickness and Stacking Loads
Sealing Face and Lid Action
Inserts: Dividers and Cushioning
Batch Consistency and Incoming Inspection
FAQ

1. Layout of the Robot Protective Box Cavity

A robot protective box usually holds loose items: a teach pendant, servo drive boards, a spare reducer, end tools. Because none of it is one solid block, how the cavity divides matters more than the outer footprint.

For one pendant and two boards, 420 by 320 by 180 mm works, split into three bays by 8 mm PP honeycomb dividers on 100 mm slots. Leave 3 mm beside each part; open it to 10 mm and the part rattles and scuffs its corners. A 110 mm clear handle takes a glove.

Decision point	Number to lock	How to check
Cavity	Part plus 3 mm, depth plus 10 mm	Trial fit of the real part
Bays	Split by size, dividers removable	Pull one divider
Divider	8 mm PP, 100 mm slots	Press middle, under 2 mm

2. Wall Thickness and Stacking Loads

On a robot protective box, a 3.2 mm wall with 1.8 mm ribs at 80 mm centres gives a 1.8 kg box a person can stand on empty. At 2.4 mm with no ribs the panel bulges under two hands and the lid line opens.

Robot protective box: dark blue box on a stainless baggage belt, black strap around it, grey totes behind

Five tiers put four loaded units on the bottom box: 48 kg of payload, 60 kg with the box, 90 kg with a 1.5 safety factor. Lid deflection must stay under 2 mm, or tier three slides inward. A 60 degree Celsius mould, 55 second cycle on a 380 t machine keeps walls even; at 40 degrees sink marks crack first in a drop.

3. Sealing Face and Lid Action

On a robot protective box, sealing comes from one gasket, not from cranking the latches down. A 6 mm section at Shore 50A, compressed 25 percent in a 4 mm groove, reaches IP65. Salt spray runs 240 hours, so pins and latch bodies are 304 stainless; zinc alloy rusts white long before that.

Two cam latches, a third of the way along each long side, open at 90 N with a thumb; a spring catch dies around cycle 2000. External hinge pins keep play under 0.2 mm after 3000 cycles. On a bench, 100 degrees with a damping strut; on shelving, a 90 degree side lid.

4. Inserts: Dividers and Cushioning

A small robot protective box needs contact, not thickness. On a 1.2 m six-face drop, 20 mm of EVA holds 55G; at 10 mm it reaches 85G and capacitors desolder first. Choose 35 kg per cubic metre.

Robot protective box: black foam insert close-up, square cavity with even grain, metal part with knurled knobs inside

Glue 3 mm EVA to both divider faces and leave 5 mm of top compression so the lid holds parts gently. Rout irregular shapes 1 mm under size and let the foam grip. One block suits stable models; blocks plus dividers suit frequent changes.

5. Batch Consistency and Incoming Inspection

Lots run from tens to hundreds, and mismatched colour is the fastest route to a return. Hold ΔE to 1.0, compare five boxes side by side, and check drying: under three hours at 80 degrees Celsius, PP shows silver streaks.

Inspection has four steps: measure three cavity points to plus or minus 1 mm, weigh one box at 1.8 kg with 5 percent tolerance, cycle latches 50 times, and drop one box loaded to 12 kg from 1.2 m.

Item	Criterion	Sample
Cavity	Plus or minus 1 mm	5 per lot
Weight	1.8 kg, within 5 percent	10 per lot
Colour	ΔE 1.0 or better	5 per lot
Drop	1.2 m, no corner crack	1 per lot

Pack four per 1.2 by 1.0 m pallet with 5 mm corrugated sheets between layers; film alone scuffs every face on a long haul.

Conclusion

Four groups of numbers settle it: cavity and bays, wall and stack load, seal and latch feel, colour and sampling. A small box forgives less, so 0.8 mm off the wall shows at goods-in. Put the numbers on the drawing, and a lot of fifty matches a lot of five hundred; specified this way, the robot protective box divides, carries and latches shut.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.