Polyurethane Discharge Blind Plate (with Lower Baffle / Vertical Rail-Mounted)

Core Advantages

1. Integrated Bottom Sealing Design for Leak-Proof and Dustproof Protection

• Superior Bottom Sealing: The high-elasticity polyurethane baffle skirt (the “bottom strip”) extending from the bottom of the blind flange tightly fits the receiving chute or conveyor belt below. This flexible contact not only achieves a seamless physical barrier, effectively preventing fine mineral powder, slurry, or dust from leaking out from the bottom gaps, but also provides excellent cushioning and shock absorption during high-frequency vibrations of the equipment.

• Eliminates Environmental Pollution: The solid, non-porous polyurethane body, combined with the bottom baffle, perfectly seals the open area at the discharge end, meeting the stringent environmental and dustproof requirements of modern mines and chemical plants.

2. Vertical Rail Mounting Structure for Rapid Installation and Maintenance

• Convenient Installation Experience: Abandoning the traditional cumbersome bolt drilling method, the blind flange features a standardized groove or boss rail mounting design on both sides. Maintenance personnel simply align the blind flange with the guide rails on both sides of the screen frame and slide it vertically from top to bottom to complete the installation. A single person can complete the replacement in minutes, greatly reducing equipment downtime for maintenance. • Robust locking performance: After vertical insertion, the blind plate forms a rigid limit with the screen frame, preventing loosening, detachment, or displacement even under severe alternating stress and material impact, ensuring continuous production.

3. Superior wear and impact resistance, significantly extended service life

• Excellent physical properties: Utilizing a carefully selected high-wear-resistant polyurethane formula, its wear resistance is 3-5 times that of ordinary rubber and 2-4 times that of metal blind plates such as high-manganese steel. It is less prone to cracking or structural damage when subjected to continuous scouring and impact from highly abrasive materials such as ores and coal.

• Reduced overall costs: The extremely long service life significantly reduces the frequency of spare parts replacement and labor maintenance costs, bringing significant economic benefits to enterprises.

4. Lightweight and corrosion-resistant, adaptable to harsh working conditions

• Excellent chemical stability: Possesses extremely strong resistance to oil, acids and alkalis, hydrolysis, and aging. It maintains stable performance in both humid sand washing environments and highly corrosive chemical beneficiation processes.

• Reduces equipment load: With a density only about 1/7 that of steel, it is extremely lightweight, effectively reducing the overall load on the discharge end. Its smooth surface also prevents material adhesion and provides a degree of self-cleaning capability.

Technical Parameters

• Material: High-performance wear-resistant polyurethane elastomer (polyester or hydrolysis-resistant polyether type available depending on operating conditions)

• Installation Method: Side-mounted vertical slide-in installation (compatible with various standard guide rail interfaces)

• Structural Features: Solid blind plate + integrated bottom baffle skirt

• Hardness Range: Shore 85A – 92A (balancing extreme wear resistance and elastic sealing requirements)

• Temperature Range: -30℃ to 80℃ (normal operating conditions; special formulations can withstand higher temperatures)

Application Areas:

Widely used in mineral processing (grading and screening discharge ports of iron ore, gold ore, copper ore, etc.), coal washing (discharge end sealing of raw coal grading and clean coal desliming screens), sand and gravel aggregate plants (discharge guidance and leakage prevention of sand making plants and sand washing machines), and end-of-line sealing operations of various vibrating feeders and conveying equipment in chemical, building materials, and power industries. Especially suitable for industrial scenarios with extremely high requirements for on-site dustproof sealing and convenient spare parts replacement.