Shredders

reliable and economical

In each enterprise wood waste is generated, by shredding the economic exploitation of this waste is improved or even made possible in the first place. The compact and reliable wood shredder system of UNTHA has been developed especially for crushing old and residual wood. Whether it is solid wood, chipboard, MDF boards, veneers, etc., the residual wood is efficiently and economically crushed.

Reliability, performance and longevity are the key features of our wood shredders. Another advantage is the warranty. It is 3 years or 2,000 hours of operation.

 

two shredding systems

 Depending on the use case, two different shredding systems are available:

  • one-shaft shredders      
  • One-shaft shredders are very universally applicable and can handle a wide range of different materials. Depending on the model, they are equipped with a sliding system that pushes the material against a rotor with replaceable cutting inserts. An easily removable perforated screen defines the desired granulate size.
  • four-Shaft Crushers
  • Due to their robust construction and high throughput performance the four-shaft shredding technology is used for difficult material, like long solid wood parts,. Due to the special arrangement of the cutting shafts, a pre-and post-crushing is made in only one process step.

With both shredding systems, the same result is always achieved for the different tasks, namely homogeneous, pneumatically or mechanically conveyable granules, which are briquetted or directly fed into the silo for later combustion in the boiler system.

 

practical examples

one-shaft shredder LR 1400
Einwellen-Zerkleinerer LR1400
one-shaft shredder LR 700
Einwellen-Zerkleinerer LR700
one shaft shredder LR 1400
Einwellen-Zerkleinerer LR1400
one-shaft shredder LR 630 with flexible screw
Einwellen-Zerkleinerer LR630 mit flexibler Schnecke
one-shaft shredder LR 1400
Einwellen-Zerkleinerer LR1400
four-shaft shredder RS 30
Vierwellen-Zerkleinerer RS30
perforated screen and shredded material
Lochgittter und Granulat
four-shaft shredder RS 30 with screw
Vierwellen-Zerkleinerer RS30 mit Schnecke
4 cutting shafts
Vierweller
one-shaft shredder LR 1000

[Translate to English:] Dokumente zum Download

one-shaft shredder series LR 520-1400

The entry-level model LR 520 is the ideal machine for systems with a residual wood volume of up to 3 m³ per week. The slide-free construction allows a very compact design. For the types LR 630 to 1400, the material is pressed by a hydraulically driven slide (LR 630 horizontal slide, LR 700 to 1400 swivel slide) load-dependent towards the rotor, which is stocked with replaceable cutting inserts, crushing the material against the cutting strips and the perforated screen.

The resulting granulate is either extracted directly (LR 520 to 700) or taken over by a conveyor screw (LR 1000/1400).

characteristics

  • wide range of applications
  • compact design
  • replaceable and reusable cutting plates and holders for cutting plates
  • low power requirement due to innovative cutting plate geometry
  • positive-fit connection between cutting plates and holders for cutting plates
  • precise cutting gap between cutting plates and cutting strips
  • use of high quality bearings
  • powerful drive concept including gear damping
  • proven hydraulic system (LR 700 to 1400 with two hydraulic cylinders)
  • wear-free swivel slide construction LR 700 to 1400
  • automatic detection of extraneous material and shutdown
  • automatic reversing in case of motor overload
  • automatic shutdown at idle run
  • easy to use
  • warranty: 3 years or 2,000 hours of operation
  • options:
  • discharging screws (LR 1000 and LR 1400)
  • customer-specific filling hoppers and supporting frames
  • magnets for pipe installation
  • conveyor belts with magnetic separation
  • automatic feeding

four-shaft shredder series RS 30/RS 40

At four shaft shredders, the material filled into the hopper is fed into the cutting chamber and, by means of the crushing disks arranged on the four cutting shafts it is crushed against the perforated screen.

The chopped granulate can be exhausted directly or conveyed via a screw.

characteristics

  • solid cast frame construction
  • case-hardened crushing disks
  • solid spur gear
  • slow-running cutting shafts
  • high torque
  • continuous shredding process
  • high throughput performance
  • automatic detection of extraneous material
  • automatic reversing in case of motor overload
  • automatic shutdown at idle run
  • easy to use
  • warranty: 3 years or 2,000 hours of operation
  • options:
  • customer-specific filling hopper and exhaust hoods
  • application dependent crushing disks
  • magnets for pipe installation
  • automatic feeding

SPÄNEX-shredders - system UNTHA -

one-shaft shredder LR 520
one-shaft shredder LR 630
one-shaft shredder LR 700
one-shaft shredder LR 1000
four-shaft shredder RS 40

advantages:

  • high throughput performance
  • low power requirement
  • robust and reliable
  • proven Cutting systems
  • automatic detection of extraneous material and shutdown
  • automatic reversion in case of motor overload
  • warranty: 3 years or 2,000 hours of operation

one-shaft shredder

  LR 520 LR 630 LR 700 LR 1000 LR 1400
drive capacity rotor kW 1 x 11 11/15/18,5 18,5/22 22/30/2 x 18,5 30/2 x 22
drive capacity hydraulics kW - 0,75 1,1 1,5 2,2
drive capacity conveyor screw kW - - - 0,55 0,55
ø rotor mm 248 248 300 300 300
rotor speed U/min 85 98 98 98 98
quantity of cutting tools pieces 14 17 19 27/54 38/76
filling opening mm 516 x 830 624 x 792 700 x 1065 1000 x 1050/1600* 1400 x 1050/1600*
ø discharging screw mm - - - 200 200
ø exhaust nozzle mm 160 160 200 250 250
required exhaust speed m/s 22 28 28 28 28
proposed pipework cross section mm 160 160 200 250 250
weights kg ca. 850 ca. 1300 ca. 1800 2400 - 2700 2800 - 3500
operator position noise pressure level LPA 1 m dB (A) ca. 82 c.a 82 ca. 82 ca. 82 ca. 82
ø perforated screen mm 12 - 25 15 - 30 15 - 40 15 - 40 15 - 40
throughput performance* srm/h ca. 0,5 - 1 ca. 1 - 2 ca. 1 - 4 ca. 2 - 6 ca. 4 - 8
dimension B mm 1065 1220 1306 1761/2010 2141/2406
dimension B1 mm 516 624 700 1000 1400
dimension H mm 1810 1670 1630 1630 1645
dimension T mm 830 1740 1712 1704 1704
dimension T1 mm - 792 1065 1050 1050

* depending upon material characteristics and perforated screen diameter at 45° machine casing, alle dimensions in mm

four-shaft shredder

    RS 30 RS 40/22 kW RS 40/30 - 37 kW
drive capacity rotor kW 2 x 55/2 x 7,5/2 x 11 2 x 11 2 x 15/2 x 18,5
cutting device opening mm 450 x 560 450/750 x 700 480/750/960 x 700
quantity of cutting shafts pieces 4 4 4
speed main shaft U/min ca. 23 ca. 20 ca. 23
speed other shaft U/min ca. 34 ca. 28 ca. 34
ø perforated screen mm 15 - 40 15 - 40 15 - 40
weights kg ca. 1100 ca. 1400/1700 1700/2100/2400
operator position noise pressure level LPA 1 m db (A) ca. 80 ca. 80 ca. 80
throughput performance*        
- perforated screen ø 15 - 25 mm kg/h 300 - 700 400 - 1100 500 - 1400
- perforated screen ø 30 - 40 mm kg/h 800 - 1200 800 - 1500 1100 - 2000

* depending upon material characteristics and perforated screen diameter

machine type / dimensions

[Translate to English:] SB L H H1 H2 B T T1 T2
RS 30 / 2 x 5,5 kW 450 1250 1900 820 450 1000 1280 560 1090
RS 30 / 2 x 7,5 kW 450 1300 1900 820 450 1000 1280 560 1090
RS 30 / 2 x 11 kW 450 1340 1900 820 450 1000 1280 560 1090
RS 40 / 22 kW 450 1360 1970 820 450 1000 1370 700 1190
RS 40 / 22 KW 750 1660 1970 820 450 1300 1370 700 1190
RS 40 / 30 - 37 kW 480 1530 1990 880 500 1045 1415 700 1190
RS 40 7 30 - 37 kW 750 1800 1990 880 500 1315 1415 700 1190
RS 40 / 30 - 37 kW 960 2010 1990 880 500 1525 1415 700 1190

all dimensions in mm, SHB = breadth of cutting device

 

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