Dosing cell 3E PUR

The entry-level model for standard applications

The SONDERHOFF 3E PUR compact dosing cell is a low-pressure mix- ing and dosing machine, which handles liquid, moderately viscous and highly viscous 2-component polyurethane systems for exact processing, dynamic homogeneous mixing, and precise dosing. The 2K material system used is applied to the components in a fully automatic process using formed-in-place foam gasket (FIPFG) technology.

When developing the new 3E dosing cell generation for seal foaming, bonding and potting of industrial components, we have focused on the key features of a modern dosing machine and designed it for the most frequently used application characteristics.

In addition to the 3E PUR, we offer two other machine types. These are the 3E SIL for 2K silicone systems and the 3E FLEX as an expandable dosing cell for optional configurations.

All three machine types of the 3E are equipped with DM 50x technology and different precision mixing heads from the MK 825 series, which feature impressive innovative improvements. They ensure maximum process stability for the fully automatic dosing of the 2K material systems used.

An attractive entry price enables very short payback periods, and the high degree of standardization also shortens delivery times.

Optimized process evaluation and control

Thanks to the MK 825 mixing head technology used in the new SONDERHOFF 3E PUR dosing cell, the machine operator now has access to a comprehensive database. It also enables preventive maintenance of wear parts. 

The automatic logging of all system, material and process data ensures the traceability of the production process at all times.

In order to ensure continuously high machine availability, various technical service concept are available. The fundamental idea here is preventive and scheduled maintenance.

The new video for the SONDERHOFF 3E PUR dosing cell



Here you can find out how easy it is to set-up and operate the 3E dispensing cell – place, plug & work!

The video also informs you about the functionality of the dosing cell, where the individual machine components are located on the system and how the optionally available shuttle table can be attached to the dosing cell in self-assembly.



Dosing cell SONDERHOFF 3E PUR for 2K polyurethane systems


Mixing head MK 825 BASIC Linear Robot Control cabinet MP 2 mobile panel Lifting door Dosing components and material containers Filling shot and rinse water tanks Shuttle / sliding table (optional) Optional refilling station

Mixing head MK 825 BASIC

MK 825 BASIC precision mixing head with high-pressure water rinsing

More information to our mixing head MK 825 BASIC

Linear Robot

The 3-axis linear robot ensures repeatable (±0.5 mm) guidance of the mixing head over the component being processed.

Control cabinet

The control electronics, servo and safety engineering, and the modular B & R branded "IPC control system" are installed in an air-conditioned switch cabinet.

More information to the control cabinet of the 3E PUR

MP 2 mobile panel

The multi-functional MP 2 Mobile Panel with touchscreen (10.1” WXGA TFT) for programming and operating the dosing machine.

More information to the operating panel of the 3E PUR

Lifting door

Lifting door with safety monitoring for manual closing and opening of the mixing head travel area in the dosing cell ensures the CE conformity of the dosing system.

Dosing components and material containers

At the front left side are e.g. the precision gear pump, the high-pressure water unit for mixing head rinsing, and the material pressure tank for the A and B components.

More information to our dosing components and material containers

Filling shot and rinse water tanks

At the front right side is the opening for removing the filling shot and rinse water tanks.

Shuttle / sliding table (optional)

Shuttle / sliding table (optional) with alternately operated manual mounting plates

More information to the shuttle table of the 3E PUR

Optional refilling station

The dosing cell 3E PUR can optionally be equipped with a refill station for automatic material supply.

More information to our refilling stations


The compact class for standard applications

Place, plug & work!


As soon as power, water and compressed air are connected and the two material components of the chosen 2K PUR system are filled into and prepared in the separate material pressure tanks, production can begin. With the 3E PUR, even small and medium quantities can be produced very economically.

The dosing machine is equipped with a manually operated lifting door. Accordingly, the machine is CE-compliant, so that no additional safety fences or light barriers are required. This boosts efficiency, saving space and costs.



With the dosing cell SONDERHOFF 3E PUR (Economic, Efficient & Ecological), you can get to work right away:

Place, plug & work!



The SONDERHOFF 3E PUR dosing cell is designed in such a way that it can be delivered in a container, fully assembled as a single unit, and only needs to be set up and connected at its installation location.
The dosing cell is removed from the transport container, set up and connected: place, plug & work. All features are arranged on a single chassis so that the dosing cell can be changed over very easily in production.
The dosing cell can be used flexibly as a production island, and with an installation footprint of approx. 9 square meters requires very little space.





Mixing and dosing machine in cellular design for processing and dosing 2K PUR systems


The SONDERHOFF 3E PUR dosing cell comprises the MK 825 BASIC precision mixing head for 2-component products with high-pressure water rinsing for mixing chamber cleaning. In the mixing head the material components are mixed dynamically, and the material system to be applied to the part is dosed in precise quantities. The MK 825 BASIC enables dosing from 0,2 to 3,0 g/s with continuously adjustable, asymmetrical mixing ratios from 10 : 1 to 1 : 2 and a dosing accuracy of ±1%.

The MK 825 BASIC is precisely guided within the travel range of 2,500 x 1,250 x 250 mm (x/y/z) by a 3-axis linear robot integrated into the cell. The linear robot features a toothed-belt drive and excellent stiffness and acceleration values for a repeatable (±0.5 mm) guidance of the mixing head over the part to be processed.


Half-open lifting door shows MK 825 BASIC precision mixing head and energy chain
Standard equipment: MK 825 BASIC precision mixing head for 2 components, with high-pressure water rinsing



Operating the dosing machine 3E PUR


The machine operator places one or more parts on the prepared workpiece holder within the working area of the dosing cell. He then closes the lifting door with a hand lever at the front of the machine. The fully automatic application of material to the part can start. For this purpose, the CNC-controlled MK 825 BASIC precision mixing head moves over the part contour.


To remove one or more parts after the dispensing process, the machine operator opens the lifting door using either the hand strap mounted there or the lever.



The individual components of the dosing cell 3E PUR


Mixing head MK 825 BASIC

2-component mixing head with high-pressure water rinsing and dynamic mixing for liquid to highly viscous polymeric reaction materials for seal foaming, bonding and potting


Control Cabinet

The switch cabinet is the expandable future-proof control center of the SONDERHOFF 3E PUR dosing cell with DM 50x technology. It includes the electrical distribution as well as the control and safety technology for the dosing machine and the CNC control of the 3-axis linear robot installed in the cell.


Dosing machine components

In the SONDERHOFF 3E PUR dosing cell, the dosing machine components are mounted on the side of the cell. This is where e.g. the precision gear pumps, compressed air connection and dryer, and the maintenance unit and high-pressure water unit for mixing head rinsing are located.


MP 2 multi-functional mobile panel

The SONDERHOFF 3E PUR dosing cell is designed to enable the operator to perform a wide variety of tasks easily and safely. The system is operated via the easy-to-use, multi-functional Sonderhoff MP 2 mobile panel with integrated 10.1“ touchscreen. This makes the contour programming of components significantly simpler.


Optional shuttle table

The SONDERHOFF 3E PUR dosing cell offers an attachable sliding table with manually shifting mounting plates as an alternative option for placement and processing of industrial parts for sealing, bonding, or potting. With this solution, a machine operator loads the two mounting plates with the parts in an alternating sequence.


Automatic refilling stations

The 3E PUR dosing cell can optionally be equipped with a refilling station for automatic material supply. This ensures material-specific preparation, homogeneous consistency and a continuous supply of materials to the material pressure tanks of the mixing and dosing system – without exposure to or contamination of the products to be filled.


Technical Service

Synthesis of proactive in-house service, experienced on-site service and responsive online service.