Scrapers for trough chain conveyors are usually made of steel, plastic or a combination of the two. The advantages of plastic include its light weight and low friction coefficient. The use of steel, on the other hand, offers greater resistance and any type of reinforcement through welded constructions.
The disadvantage of both materials is that excessive loads through foreign objects such as stones, steel clips, wires, etc. may bend them which can result in a reduction in the chain centre distance in double-chain conveyors. This then causes the chains jump off the sprockets − a serious breakdown is unavoidable. The mechanical damage to the chains and sprockets is usually less than the consequential costs to the conveyor system and the downtime costs to the lifelines such as fuel supply, silo discharge, ash removal and chip scrapers.
INNO scraper flights – the sustainable alternative
INNO sustainable flights (also known as scrapers) are an energy-efficient and cost effective alternative to steel conveyor scrapers. They are suitable for a wide variety of applications including sawmills, cement plants and biomass power plants.
Our INNO wooden flights are made from multi-laminated beech which, when processed and assembled using thermo-settings, weigh one-tenth of traditional steel scrapers but with the same durability.
They are manufactured at the FB production facility in Germany, but can be supplied globally. We are also able to produce INNO scrapers according to your individual requirements.
Why INNO sustainable flights?
INNO chain conveyor scrapers offer a variety of benefits:
- They’re lightweight – energy savings due to low friction coefficient (approx. 0,2) – slide twice as easily as steel and are approx. 60-80 % lighter
- They’re wear-resistant. Longer service life, no bulging, washable, antistatic, resistant to oils and water
- Ideal resistance at maximum operating temperatures. Processed ready for installation and multifunctional use from -200 °C to approx. +100 °C
- There is less downtime caused by bent attachments or jammed conveyors
- They snap when overloaded. High quality ensures high operational safety The calculated predetermined breaking point guarantees high system run-time, operational safety and prevents high consequential costs
- They cause no damage to the chain conveyor and surrounding equipment
- They’re easy to install
- They can be burnt or shredded as part of the normal process
INNO wooden flights are available in three different strengths (INNO 100, INNO 500 and INNO 1000) according to your application. INNO 1000, for example, is recommended for conveying materials with a high water content as it has a low absorption rate.
| INNO 100 | INNO 500 | INNO 1000 | ||
|---|---|---|---|---|
| Gross density kg/cm3 | ||||
| DIN 53479 | ca. 750 | ca. 1350 | ca. 1350 | |
| Flexural strength N/ mm² | || Layering | 65 | 165 | 160 |
| DIN 53452 | ┴ Layering | 75 | 180 | 190 |
| Impact strength kJ/m² | || Layering | – | 25 | 20 |
| DIN 53453 | ┴ Layering | – | 50 | 30 |
| Notched impact strength kJ/m² | || Layering | – | 20 | 10 |
| DIN 53453 | ┴ Layering | – | 50 | – |
| Tensile strength N/mm² | || Layering | 65 | 125 | 120 |
| Compressive strength | || Layering | 43 | 135 | 150 |
| DIN 53454 | ┴ Layering | 35 | 270 | 260 |
| Indentation strength N/mm² | ┴ Layering | – | 140 | 200 |
| Split load N | ┴ Layering | – | 3000 | 4600 |
| Shear strength N/mm² | || Layering | – | 10 | 15 |
| ┴ Layering | – | 60 | – | |
| Elasticity N/mm² | ||||
| DIN 53457 flexibility | ┴ Layering | 8200 | 17000 | 16000 |
| DIN 53457 pressure | ┴ Layering | 7400 | 2600 | – |
| || Layering | 5600 | 6000 | 14000 | |
| Kinetic coefficient of friction μG | ||||
| Against bright-rolled stainless steel | ┴ Layering | – | 0.2-0.3 | 0.18 |
| Water absorption as a % after 24hrs water addition (test specimen 50x50x30) | ||||
| 26% | 3.5% | 2.5% |
|| Layering = parallel layering ┴ Layering = perpendicular layering