IMIX tech: Dynapac’s next level of homogeneous material transfer


Dynapac has launched its much-awaited IMIX system for asphalt paving, which eliminates temperature and material segregation. 

The new IMIX system made its debut on Dynapac’s MF2500CS mobile feeder, featuring a versatile belt system, intelligent operator assistance systems and flexibility to configure the machine for the right application. 


Material segregation occurs during loading, transport and dumping. Larger material tends to move to the outer sections, while smaller material settles in the middle of the material flow. 

The heart of the IMIX-system is the combination of three strategically positioned devices: a conical auger in the hopper, a flow divider in the conveyor and a mixing system at the end of the main conveyor. 

The augers in the hopper push the large particles, which are stagnant at the colder outer sections on the hopper towards the middle of the conveyor to join the main flow. The material is transported by the movement of the belt to the top, where the flow of material is split by a flow divider into two streams. These streams of material are mixed and blended at the end of the conveyor by an auger mixing system before leaving the main conveyor.  

The unique arrangement equalizes temperatures within the mix and blends large and small stones. The result is consistent and long-lasting road quality, according to Dynapac.

For cold materials, like RCC, the conveyor mixing system can be lifted by pressing a button. This ensures a higher material output. 

Distance Assist

Maintaining a safe distance between the material feeder and paver — while docking to the truck to the feeder and paver simultaneously — can be a daunting task.  

Dynapac Distance Assist automatically maintains a set distance between the paver and feeder. The feeder is equipped with a laser sensor, which allows the feeder operator to virtually connect to the paver and follow the speed of the paver movement.

The feeder driver can focus on the job at hand which is material transfer. Combined with the possibility to save multiple distances, feeding two pavers becomes less stressful with the Dynapac MF2500CS equipped with the SwingApp.

To keep the paver operator informed, the feeder is equipped with a LED bar, which shows the status of the radar sensor and the deviation to the correct distance. 

Swing Assist

Feeding two pavers simultaneous is often demanding for the feeder operator. Via the SwingApp, Dynapac Swing Assist helps the operator by recording the height and angle of swing for both of the pavers’ locations, allowing the operator to recall the positions by just the press of a button. 

In combination with Distance Assist the feeder drives automatically to the correct position and the SwingApp moves directly over the hopper of the paver. 

The SW6500 SwingApp

The MF2500CS may be equipped with the 91 cm extended SW6500 SwingApp conveyor for long side reach for paving over barriers and in-line or echelon paving applications. 

The newly developed 8.5-metre-long conveyor SW6500 has a side reach of 3.8 metres. Thanks to its integrated quick coupling cylinders and lifting points, the SW6500 can be mounted behind any MF2500CS within 20 min. This reduces investment cost for the contractors using one swing app for multiple machines in their fleet. The patented system reduces wearing and makes the MF2500CS a more flexible machine.

Smart belt conveyor design

The feeder’s rubber belt is mounted directly on metal stiffeners. This unique concept allows longer intervals for belt changes and a higher planning reliability. 

For longer uptime, the rubber belt connection has been optimized, and  extensive testing in varying conditions with various mixes have verified improved stability. As well, the newly positioned spraying beam under the front hopper flap guarantees a permanent wet feeder belt. This prevents adhesion with difficult mixes and weather conditions.

The new dual scraper for the SwingApp is robust and removes persistent adhesions. The pressure of the scraper, spraying interval and period can be adjusted individually according to site requirements. This lowers wearing and usage.

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The feeder belt is held in place by chain rollers, so no chains have to be dismantled when changing the belt. The new belt is attached to the old one with a quick coupling system and fed in place. This design makes a feeder belt change possible within a couple of hours. Furthermore, no vulcanization is needed, as the belt is immediately ready for action. 

The Dynapac MF2500CS is the only MTV on the market that can be used for transferring a variety of materials such as asphalt, RCC, aggregate or sand. Thanks to the precise belt control and the foldable material hopper, as well as the optional rubber skirt, the transported material can be precisely fed.   

For large paving widths, the Dynapac MF2500 delivers a feeding capacity of up to 4,000 tons per hour.

The Dynapac feeder also delivers a cleaning time of less than 30 minutes.  The optimized cleaning concept with three separate pumps, an enlarged release agent hose and hose connections in front and in the back of the feeder counteract material sticking to the feeder, which minimizes cleaning at the end of day. 

Operator comfort

The MF2500CS MTV’s hydraulic liftable platform elevates the operator area about 1.2 metres with a touch of a button providing a 360-degree complete jobsite view. 

The Truck Assist feature makes truck docking/un-docking to the feeder simple and efficient, and eliminates the dump person from the jobsite. As well, a series of LED bar lights signals the truck driver when to back up, dump the material and when to leave. The light sequences are controlled by the feeder operator. 

The dashboard of the MF2500CS features a large 18 cm screen that displays vital feeder parameters. Three smartly positioned cameras allow the operator to see the front and rear of the feeder and the paver hopper area providing optimal visibility around the feeder at all times.