Weima: Shredding of Bulky Plastic Containers

WEIMA Maschinenbau GmbH (www.weima.com) has developed a new version of the WLK 12 single-shaft shredder for the size reduction of bulky plastic containers and parts with thin gauge wall thicknesses like totes, barrels, drums, tanks, etc. The compact design of the machine includes a new press-down device that enables the customer to shred even the largest size totes without the need to pre-cut.

This new single-shaft shredder is equipped with a doghouse design hopper that is open over top of the rotor. Whole Pieces are directly loaded into the front of the machine. After the container is loaded into the cutting chamber the integrated press-down device will ensure that the part is situated in the bottom of the shredder. The horizontal ram pushes the material into the rotor parallel to the down stroke of the press-down device.

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Both pressing actions are controlled by sophisticated electronic controls that ‘read’ the amp-load on the main motor and optimize the pressure applied to the cutting rotor. This optimization acts to keep material in constant contact with the rotor. The WEIMA “V” Rotor provides tight tolerances between the rotor and the stator knife to ensure proper size reduction. When material is shredded small enough it will pass through a screen that is mounted under the rotor. At this point, the material can be further granulated if desired.

The working width of the WLK 12 is 1,200 mm (47.2”). This size machine can handle intermediate bulk containers and other large totes along with materials in sizes up to 1m x 1m x 1 m . The V-Rotor that is utilized on this machine has a diameter of 368mm (14.5”). The main drive of the WLK 12 is either equipped with a 37kW (50hp) or a 45kW (60hp) motor to achieve capacities of 600-1,000 kg/hour (1,300-2,200 lbs/hour) with screen sizes from 20mm-100mm (3/4”-4”). The machine weighs approximately 7500 kg (16,500 lbs). Alternative sized machines are available upon request.

The machine can be used for other applications like purgings if the optional press-down device is disengaged.

Photo: WLK 12 single-shaft shredder for the size reduction of bulky plastic containers and parts with thin gauge wall thicknesses

WEIMA Maschinenbau GmbH, Ilsfeld/Germany

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