The new partner of Finnish company Kivisampo Oy is German company ARJES, which has been manufacturing twin-shaft shredders in various sizes since 2007. The smallest machine in the ARJES product range has now traveled to many places in Finland as a demonstration machine and the experience from the first round is promising, according to Kivisampo. The double axel tracked compact shredder crushes a wide range of materials without clogging up and with sufficient impact force for its size, thanks to its two slow rotating tool shafts.

Initial test runs have successfully crushed: concrete, scrap wood, root wood, plastics, commercial and industrial waste; construction and demolition waste; roofing felt and other materials. Thanks to a base weight of 14 tons, the machine can be easily transported, for example by a truck with hook lift. “On the construction site, the machine is rapidly set up for use and moves easily from one place to another”, says Kivisampo.

“We promptly decided to add the ARJES IMPAKTOR 250 evo to our product line because there is a clear demand for a small crusher. Many recyclers need to crush multiple grades, but the quantities may not be too large. Nevertheless, every challenge needs to be addressed and this works very well with the compact IMPAKTOR 250 evo. Soon after having started the demo tour, operators seemed to have a greater demand for a small and versatile machine that can shred different waste products,” says Petri Ihainen from Kivisampo Oy.

The IMPAKTOR 250 evo can be equipped with two different types of shredding shafts. One pair of shafts is for crushing concrete and asphalt, the other is for other types of waste such as waste wood, roots, mixed construction waste etc.

For a wide range of materials

The shafts with a length of 1,500 mm and a diameter of 680 mm are attached to a quick-change cassette and can be changed quickly if the material to be crushed changes. Below the shafts there is a crushing bar and two counter rakes on both sides. When crushing concrete and asphalt, the counter rakes are kept closed so that the grain size of the final product is 0 – 80 mm. If the material to be crushed changes, the counter-screens can be opened, resulting in a larger proportion of the final product. For example, tough roofing felt or wood waste comes out in pieces 0 – 250 mm in size.

“The compact ARJES shredder is best suited where it is needed to process a variety of materials in manageable quantities” Petri Ihainen continues.

In the first test run, the capacity for concrete was 65-70 tons per hour. The piece size of the input was between 0 – 700 millimeters. In comparison to impact and jaw crushers, there were no material blockages or interruptions in operation, according to Ihainen. All the iron in the concrete was broken into pieces of about 100 – 350 millimeters and separated by the over band magnet. The machine also has a water spray system as a standard feature that reduces dust in the hopper as well as on the discharge conveyor.

There are three predefined programs for adjusting the shaft rotation. If the pressure switches notice changes in the resistance of the shafts and they automatically adjust the direction of rotation. “Thanks to this system, there is no clogging and each shaft can rotate at different speeds and in opposite directions to prevent clogging,” Ihainen adds.

The diesel engine is a 129 KW Volvo Penta (TAD 581 VE) and Szage V compatible.. Easy access facilitates maintenance and cleaning of the unit. The discharge conveyor height is three meters, which Ihainen says is very good for a unit of this size. The feeder operator can use the remote control to control the unit’s functions and move the unit when necessary. Of course, all control functions can also be found on the mechanical levers on the side of the crusher. The size of the crusher unit is 2.25 cubic meters.

ARJES GmbH would like to thank our partner Kivisampo Oy and the original coverage of the Finnish magazine Konepörssi for their great contribution to the IMPAKTOR 250 evo. (Original report from the magazine Konepörssi)