Dynapac expands additional into oscillation with new CO5200 VI tandem compactor

Dynapac’s first foray into oscillation on a tandem drum curler got here two years in the past with the 9.9-ton CO4200 VI. On the latest ConExpo present, the corporate confirmed it’s increasing the compaction technique in an even bigger method.

Dynapac’s new CO5200 VI tandem curler, just like the CO4200, options vibration on the entrance drum and oscillation on the rear. It represents the corporate’s largest curler, at 11.7 tons and a 77-inch compaction width, to supply oscillation.

Nevertheless it gained’t be Dynapac’s final oscillation mannequin, or its largest for lengthy.

Fredrik Akesson, rollers product portfolio supervisor, revealed that the corporate plans to introduce a 6200 mannequin, at 13.7 tons and 84-inch compaction width, within the third quarter. A smaller 2200 mannequin, at eight.4 tons and a 59-inch compaction width, can also be anticipated to launch across the identical time.

Akesson says that earlier than going with oscillation, which compacts by horizontal motion as an alternative of vertical vibration, the corporate first needed to clear up two most important issues that it noticed on early oscillation machines.

For one, oscillation creates a rubbing motion that may result in fast put on on the drum shell. To fight that, Dynapac made the drums out of Hardox 450 metal, which Akesson says is the toughest metal that may be formed right into a drum shell.

The opposite downside was the prolonged and tough course of of adjusting the timing belts for the oscillating drum’s off-centered eccentric weights. Akesson says that’s sometimes a two-day job that should be carried out within the store, involving dismantling the drum. As a substitute, the timing belts on Dynapac’s oscillating drums may be changed in two hours and may be carried out within the area if mandatory, in response to Akesson. An illustration of the belt-changing course of may be seen on this video under:

Fixing these issues, he says, enabled the corporate to delve into oscillation with confidence.

The result’s a vibrating drum that may present in-depth compaction, and an oscillating drum that delivers a gentler compaction nearer to the floor. The operator may change to solely oscillation. Akesson says makes use of for oscillation embrace bridge decks and joints, in addition to close to foundations and concrete constructions, and for higher efficiency on skinny asphalt layers.

The CO5200 VI runs on a 130-horsepower turbo Cummins Tier 4 Last engine. Vertical oscillation is plus or minus 7 levels. Nominal amplitude is .031 – .012 inches, and vibration frequency is 3,060 – 4,020 vibrations per minute.