Polyurethane Screen Installation Guide: Methods, Techniques & Best Practices

1. Tension-Type Installation Technology

Tensioning ensures a tight fit between screen mesh and plate, ideal for high-frequency vibratory screening. Follow these steps:

1.1 Pre-Installation Verification

Use a laser rangefinder to align screen dimensions (±1.5mm tolerance).

Check flatness: indentations must not exceed 0.3mm/m² (grind/shim if needed).

1.2 Dynamic Positioning

Employ the "center-and-spoke" method: Fix the center point, then expand along a 45° diagonal.

Use dedicated fixtures to prevent uneven stress.

1.3 Intelligent Tensioning System

Hydraulic systems: Set pressure to 0.8–1.2 MPa.

Tightening sequence:

60% initial → 80% after 24h → 100% final.

1.4 Vibration Testing

No-load test with a laser vibrometer: Amplitude difference ≤15% of design value.

1.5 Maintenance Plan

Three-shift inspection:

Check tension per shift.

Measure wear weekly.

Full connector tightening monthly.

Use heat-resistant protective agents in high-temperature environments (30% lifespan increase).

2. Inlay Mount (Dovetail Groove & Rail Mount)

2.1 Groove Machining Precision

Dovetail angle: 55° ±1° with 0.5mm thermal expansion gap.

CNC milling roughness: ≥Ra 3.2.

2.2 Composite Sealing

Layer epoxy resin + fiberglass mesh (0.2mm primer → mesh → topcoat).

2.3 Stress Dispersion

Bolt spacing: 150mm (feed end) → 200mm (discharge end).

Torque: 25–30 N·m (tighten center→ends in staggered pattern).

2.4 Dynamic Seal Test

0.3 MPa water jet at 45°: Leakage ≤ 0.05% of processed volume.

3. Bead Connection & Bolt-On Methods

(Note: Expand with similar detail for bead/bolt-on per original document.)

4. Comparative Advantages & Industry Applications

Tensioning: Best for high-frequency screens.

Inlay: Superior sealing for wet screening.

Bolt-On: Easy replacement in corrosive environments.

Conclusion
Proper installation extends polyurethane screen life by 40%+. Follow these techniques to minimize downtime and maximize efficiency in mining and metallurgy operations.