Introduction
Installing a UHMWPE liner isn't just about placing a sheet over a surface; it's about engineering a secure, reliable attachment system. If the fastening method is incorrect, the liner can lift, snag, or even peel off under the heavy flow of coal, ore, or aggregate.
JSLT Mining shares this guide on the best practices for mechanically fastening your UHMWPE liners.
1. Use of Countersunk Bolts
To ensure a smooth, low-friction sliding surface, the bolt heads must never protrude above the liner.
- **Hole Preparation:** We recommend CNC-drilled countersunk holes.
- **Bolt Choice:** Use stainless steel or zinc-plated carriage bolts with heavy-duty backing plates on the steel hopper exterior.
2. Managing Thermal Expansion
Polymers expand and contract more than steel.
- **Oversized Holes:** Fastening holes should be slightly larger than the bolt shank to allow the plastic sheet to "breathe" during temperature cycles.
- **Spacing:** Avoid placing bolts too close to the edge of the liner to prevent edge-lift.
3. Leading Edge Protection
The most vulnerable part of a liner is the top (leading) edge where material enters.
- **Tucking:** Tuck the top edge under an existing steel plate or a specifically installed "kicker bar".
- **Overlap:** Ensure sheets are overlapped in the direction of material flow to prevent snagging.
### Conclusion
A correctly installed JSLT liner can outlast steel by 3 to 5 times. Follow these engineering steps for maximum return on investment.
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🔗 Technical Help: Lining Installation Tips
