Every polycarbonate conveyor guard that ends up on a shelf in the maintenance room was removed for a reason, and the reason is almost always access or visibility rather than the guard design itself.
A food packaging plant in County Durham installed fixed 5 mm panels around four lines. Within a month, three panels had been taken off and stacked, and a nip point on line two was left exposed for a full shift.
Polycarbonate conveyor guard panel and coverage
- Fixed low-risk panel: 6 mm
- Projection risk: 8 to 10 mm
- Coverage: full nip point plus 300 mm each side
- Fixing: bracketed, slotted, replaceable
Coverage is measured from the hazard, not to the frame. A nip point guarded to its own edges leaves the approach path open, which is where hands actually travel.
Inspection panels and cleaning
The access detail is what decides whether the guard stays. A 200 mm hinged inspection panel with a latch at each station lets an operator clear a jam without removing the barrier, and an interlock makes the shortcut impossible.
Cleaning in a dusty line needs a dry brush and a mild wash. A solvent wipe on a flour-dusted panel turns the dust into an abrasive paste and hazes the surface in a week.
For the machine-level version of the same logic, see machine safety guards.
Send your line layout, nip point locations and risk assessment to oversales@rpplexiglass.com for guard panel pricing.
Frequently Asked Questions
What thickness polycarbonate for a conveyor guard?
6 mm for a fixed panel on a low-risk line, 8 to 10 mm where the assessment identifies a projection risk from the product or the mechanism. The panel is a barrier first and a window second.
Why are conveyor guards removed by operators?
Because the window is dirty or the access is awkward. A guard with a properly sized hinged inspection panel and an interlock stays in place; a solid barrier gets taken off within a week.
How should panels be fixed to the line frame?
With bolted brackets on a slotted hole, never welded or bonded to the machine frame. The panel needs to be replaceable without cutting the frame, and it needs 2 mm of movement for expansion.