Wood ChippersThe most widely used Wood Chippers are of the 'Flywheel' (conventional flat blade) principle, these use 2, 3, 4 straight knives bolted to a flywheel type structure which rotates at high speed, the knives pass close to a shear bar or anvil which holds the material to be chipped as the knives pass.
For efficient chipping it is essential to have sharp knives, providing contaminated material is not put through the machine, knives will require sharpening every 25 - 30 hours.
2 powerful infeed rollers are desirable for professional users to ensure difficult material is pulled into the machine and forced against the knives.
Some Chippers have problems with green wet conifer and similar material, a powerful air blast is vital to avoid blockages and to discharge the material into a vehicle or skip.
The 'Disc Blade' system uses 100mm (4-inch) diameter high grade steel discs, their curved edge 'slices' the wood, making them less susceptible to damage and 3 Db quieter.
The Disc Blade can be rotated as the edge in use becomes blunt or damaged, dramatically reducing operating costs and downtime.
When having a demonstration be sure to test the machine on all the types of material you are likely to require chipping.
| Don't buy a chipper if the material is contaminated with soil, stones, nails etc. or is wet soggy green waste material. |
Drum TypeOne of the earliest Chipping principles producing a larger chip than the most popular flywheel type machines.
Screw TypeDeveloped in Scandinavia, produces a larger chip and mostly fitted to tractors. These machines are not fitted with feed rollers and the material cannot be 'Reversed' or 'Stopped' from entering once engaged.
Flywheel (conventional flat blades)Most widely used principle to date with 2, 3, 4 straight blades, either 'Self or Roller Feed'.
The patented Disc Blade system developed by GreenMech gives improved performance, reduced power & costs.
Green Waste ShreddersThe most widely used 'shredding' principles are the 'Hammer Mill' using a series of metal strips arranged on a shaft rotating at high speed, the material is 'hammered' against a curved plate with various size holes (screen) through which the material is forced, normally no more than 60cm (24") wide.
'Flail' type shredders generally used on wider machines have a high speed rotor to which are mounted 'Flails' of various size and shape, material is loaded into a hopper and conveyed into the Flails which 'shred' the material, in some cases it is also forced through a screen and either deposited on the ground or conveyed upwards into a pile, lorry or skip etc.
'Flails' per ton of material probably requires up to 300% more HP than 'Chippers'.
'Tub Grinders' were developed in the USA to reduce the 'Volume' of construction site waste, most use a heavy rotor with rigidly mounted hardened steel projections which 'Grind' the material against heavy variable size 'Screens', material is loaded into a 'Tub' above the rotor, typically they use 300 - 600hp.
The 'Disc-Shred' system is a series of discs on a shaft rotating inside a drum, the discs being angled to 'auger' the material towards and through a screen into the rear of a chipper flywheel and discharge chute.
The discs can also be rotated as the edge becomes blunt or damaged.
All forms of 'Green Waste' material can be processed.
| Don't buy a shredder if it is tree branchs and scrub material not contaminated with soil, stones, metal etc. |
Hammer MillA system used for many years in Agriculture, material is shredded and forced through a screen.
Tub-GrinderDeveloped in the USA to reduce all forms of waste normally 300 - 600hp.
Flail TypeVarious types of 'Flail' designs with 'infeed' conveyor, variable screen and discharge elevator.
Disc-ShredPatented 'Disc-Shred' system developed by GreenMech, improved performance, reduced power & costs.
For further information please contact us.
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