Scraper

conveyor belt systems
Primary & Secondary Conveyor Belt Cleaners
Conveyor belt protection and cleaning
Conveyor Belt cleaner
Secondary (or tertiary) Cleaners
 conveyor belt cleaning systems
conveyor belt cleaner scraper
automatic conveyor belt cleaning system
portable conveyor belt cleaner

The importance of conveyor belt cleaning and routine maintenance：
Belt cleaners are an integral part of your belt conveyor system because of their ability to remove carry back from your belt. Carry back is a leading issue on many conveyors, requiring frequent clean-up while wearing our conveyor components prematurely and causing other conveying problems like belt mistracking. Reducing carryback can improve worker safety, increase operating efficiency, and enhance productivity.

Conveyor Belt Cleaner on Head Pulley  

What is a precleaner or primary belt cleaner?
TONDA polyurethane scrapers serve as critical cleaning components for belt conveyors, primarily composed of high-molecular-weight polyurethane with a specialized formulation to optimize performance. These scrapers cover key areas including the conveyor head, return section, and tail, categorized into four main types based on cleaning requirements: H-type (primary), P-type (secondary), and V-type. Their advantages are embodied in four core characteristics: high abrasion resistance, low damage potential, self-compensation capability, and extended service life, making them an upgraded replacement for traditional alloy/rubber cleaners.

What is primary belt cleaner / precleaner ?
The pre-cleaner is a belt cleaner designed to scrape material off the conveyor belt. Installed beneath the head pulley, it operates below the material flow. It is particularly effective at removing large chunks of material—typically eliminating approximately 60-70% of initial residue. To maintain a clean head area of the conveyor, its highly wear-resistant polyurethane scraper blade prevents belt damage, ensuring stable and long-lasting cleaning performance. Suitable for mining, sand, gravel, and aggregate operations, it offers custom specifications. TONDA brand pre-cleaners provide multiple widths and blade types tailored to user requirements, capable of handling high-hardness materials.

H-Type (First-Stage Cleaner): Installed at the head discharge roller (the first point of contact after belt unloading), it removes large adhered materials (e.g., coal, ore) from the working surface of the conveyor belt, serving as the “first line of defense” in the cleaning process.

What is a secondary BELT cleaner?
The return side cleaner, also known as the secondary cleaner, is specifically designed to scrape residual material from the conveyor belt after the head pulley. It is typically installed immediately adjacent to where the belt exits the head pulley, though it can be positioned at any other point along the conveyor line. This device aids in removing fine particles, boosting the belt's cleaning efficiency to over 90%. Tonda brand cleaners are suitable for diverse operating conditions, offering durable polyurethane cleaning devices in multiple specifications and configurations.

P-Type (Secondary Cleaner): Installed on the stable working surface near the head pulley (the positive pressure side of the return belt). Used in conjunction with the H-Type to remove fine, wet, sticky materials (e.g., coal slurry, mineral powder), ensuring no residue remains during belt return.

What is V plow belt cleaner?
V-Plow (Idle Section Scraper): Installed on the non-working surface near the tail drum (conveyor belt's return section), it removes loose material (e.g., spilled material, dust) from the non-working surface to prevent material from entering the tail drum and causing jams or belt misalignment.

Do I need a precleaner and a secondary cleaner?
Tonda has designed single-stage, two-stage, and V-shaped cleaners to provide comprehensive cleaning at different positions along the conveyor belt, achieving efficient cleaning that better protects the belt and enhances operational efficiency. Of course, you can also install cleaners individually based on your specific operational scenario to target precise cleaning in designated areas (such as the head pulley) for optimal results.

We offer multiple solutions to minimize material return and ensure stable, efficient conveyor operation.

TONDA PU conveyor belt cleaner Advantages: 4 Core Characteristics compared to Traditional Materials
The superiority of polyurethane scraper blades stems from breakthrough material properties and ergonomic structural design, primarily manifested in the following aspects:

High Wear Resistance, Extended Service Life:
Polyurethane exhibits wear resistance (JIS 6264 standard) ≤3mm², offering 3-5 times the durability of rubber and 2-3 times that of alloy materials. For example, Meihuan Rubber & Plastic's polyurethane scrapers utilize new urethane materials, offering significantly superior wear resistance compared to standard polyurethane. Their service life reaches 3-4 years (compared to only 1-2 years for traditional alloy rubber cleaners).

Low Friction, Belt-Friendly:
Polyurethane's friction coefficient (μ≈0.3-0.5) is significantly lower than rubber (μ≈0.8-1.0) and alloys (μ≈1.2-1.5). During cleaning, it exerts minimal shear force on the conveyor belt, preventing surface scratches or fuzzing. For example, Weibide scrapers feature highly elastic blades designed to achieve “cleaning force and resistance balance,” completely preventing belt damage.

Self-Compensating for Consistent Cleaning Performance:
Polyurethane cleaners incorporate spring tension adjusters (e.g., Meihuan's “Unique Tensioning Device”). When the scraper blade wears (e.g., wear ≥5mm) or the belt vibrates, the spring automatically compensates. This ensures the scraper maintains tight contact with the belt (contact pressure sustained at 10-15N/mm²), delivering stable cleaning results.

Corrosion-Resistant for Harsh Environments:
Polyurethane exhibits hydrolysis resistance, acid/alkali resistance, and oil resistance, making it suitable for harsh environments like mines (ore corrosion), coal preparation plants (coal slurry immersion), and chemical plants (acid/alkali materials). For instance, Yiyong Polyurethane's blades use a polyether formulation that maintains stable performance in pH=3-11 environments without fracturing due to corrosion.

Application Value of Polyurethane Scraper Blades
Through material innovation and positional optimization, polyurethane scraper blades resolve the pain points of traditional cleaners—rapid wear, belt damage, and incomplete cleaning. Their long service life, low maintenance requirements, and high cost-effectiveness make them the preferred cleaning solution for mining, power generation, metallurgy, and related industries. For instance, after adopting polyurethane cleaners, a mining operation doubled its conveyor belt lifespan while reducing cleaning maintenance costs by 40%, achieving significant overall economic benefits.

For detailed product specifications (e.g., Shore hardness, tensile strength) or customized solutions, refer to TONDA brand factory.