Reliable mixing and dosing

Experience and precision in every machine component

 

A mixing head for processing two or three components has three essential functions. Firstly, the precise dosing of two components into the mixing chamber at the specified mixing ratio through the built-in valve technology. Secondly, the components are homogeneously mixed within the mixing chamber by the servo-controlled agitator. Then the material is applied precisely onto the part through the dosing nozzle.

 

For material systems with simple mixing ratios and generous processing tolerances, static mixing is often enough. Here, the two material components only need to be pressed through a mixing tube in the correct quantity ratio. The material flow is then swirled by the inside structures of the mixing tube to such an extent that sufficient mixing occurs.

Dynamic mixing makes the difference

The greatest possible level of material homogeneity after mixing 2-component material systems with different viscosities – even in the case of demanding, asymmetrical mixing ratios – can only be achieved with dynamic mixing. Static mixers are capable of swirling material components of similar viscosity during continuous dosing. These can be used for material systems that allow generous deviations in the mixing ratio and react comparatively slowly, thereby preventing material that has already stuck together in the mixing tube from collecting and forming a blockage.

The dynamic mixing head is totally different. For example, it enables dosing from 0.2 to 100 g/s with continuously adjustable mixing ratios from 100 : 1 to 1 : 100 and a dosing accuracy of ±1%. In the case of fast-reacting material, the mixing chamber can also be rinsed regularly – in the case of the MK 800 series with the patented high-pressure water rinsing process!

 

The New Mixing Heads of the MK 800 Family

Many improvements – one aim: maximum precision 

OPTIONS IMPROVEMENTS MK 800
BASIC
MK 800 Plus MK 800 Pro
Mixing chamber temperature sensor Unchanged

 

Mixing head cooling system by means of a Peltier module
(mixing chamber / intermediate housing)
NEW!
Own circuit instead of split circuit
Benefit: easier to maintain
 

Mixing head temperature control by means of temperature control unit (mixing chamber / intermediate housing) NEW!
Temperature control additionally also for intermediate housing instead of only the mixing chamber
Benefit: Higher efficiency
 

Manual stroke adjustment by means of adjusting wheel NEW!
Via adjusting wheel instead of with feeler gauge
Benefit: Improved adjustability

 
Automatic stroke adjustment by means of stepper motor NEW!
Stepper motor
Benefit: Fully automatic adjustment
   

Sensor-monitored axial position of the agitator shaft NEW!
Detects whether the mixing chamber, agitator and nozzle are installed correctly, Detects signs of wear
Benefit: preventive maintenance
   

Recirculation valve with manual pressure adjustment / manual pressure regulator NEW!
Manual pressure regulator instead of preloading screw on the valve
Benefit: Improved adjustability

   
Recirculation valve with automatic pressure adjustment / electronic pressure regulator Unchanged: Electronic pressure regulator  

Version with stub valve Unchanged

Material pressure measurement directly on the valve NEW!
In the BASIC version (unchanged from PLUS and up)

Needle stroke measurement on the dosing and recirculation valve NEW!
Documents I/O functionality of the valve and signs of wear, if applicable
Benefit: preventive maintenance
   

•   Standardausstattung

•   Optionale Ausstattung

SONDERHOFF  MK 800 / MK 825 BASIC

2- / 3-component-mixing head with high-pressure water rinsing and dynamic mixing

 


 

 

 

TECHNICAL DATA*
  MK 800 BASIC MK 825 BASIC
Dimensions (H x B x D) 2C mixing head 248 x 237 x 151 mm 248 x 237 x 151 mm
Dimensions (H x B x D) 3C mixing head 248 x 237 x 219 mm 248 x 237 x 219 mm
Operating pressure up to approx. 20 bar up to approx. 20 bar
Discharge rate 3,0 g/s to 100 g/s 0,2 g/s to 3,0 g/s
Dispense accuracy  ± 1 %  ± 1 %
Mixing head weight for 2 components approx. 5,5 kg approx. 5,5 kg
Mixing head weight for 3 components approx. 6,7 kg approx. 6,7 kg
Mixing ratio of 100 : 1 to 1 : 100 continuously adjustable
Selectable mixer speed from 1 – 6 .000 U/min 
* Depending on the mixing ratios, material viscosities and the adaptation of pumps, hoses and mixing elements

DESCRIPTION    

  • 2- / 3-component mixing head with high-pressure water rinsing and dynamic mixing for liquid to highly viscous polymeric reactive materials for seal foaming, bonding and potting

  • High-pressure water rinsing for ecological cleaning of the mixing system using high-pressure needle valves for rinsing water injection

  • Alternative component rinsing (for the use of non-reactive components)

  • Hydromechanically regulated precision recirculation valves for precise dosing

  • Can also be equipped with stub lines for bonding or potting applications

  • Weight-reduced construction of a modular design, blue-gray anodized

  • Robust and maintenance-free design made of high-strength aluminum alloy and chrome steel

  • Direct stack injection of the components

  • Electronically adjustable mixer speed

  • Special mixer design enables gentle material mixing

  • Blowing air needle valve for drying the mixing system

  • Low-drip, low-maintenance nozzle shut-off system STOP-DROP DVS 3

  • DVS 3 stroke can be easily adjusted by means of an adjusting wheel

  • Material pressure measurement on the dosing valve

     

Options

  • Mixing head housing made of chrome steel
  • Customer-specific outlet nozzles
  • Spraying system

Rear view of mounting bracket and valve cluster

Adjusting wheel for stroke adjustment of the nozzle shut-off system DVS 3

Optionally also available in a version with stub valves

MK 800 / MK 825 PLUS

Sensor-controlled 2- / 3-component mixing head with high-pressure water rinsing, dynamic mixing and mixing chamber temperature sensor

 

 

Technical Data*
  MK 800 Plus MK 825 Plus
Dimensions (H x B x D) 2C mixing head 248 x 204 x 151 mm 248 x 204 x 151 mm
Dimensions (H x B x D) 3C mixing head 248 x 204 x 202 mm 248 x 204 x 202 mm
Operating pressure up to approx. 20 bar up to approx. 20 bar
Discharge rate 3,0 g/s to 100 g/s 0,2 g/s to 3,0 g/s
Dispense accuracy ± 1 % ± 1 %
Mixing head weight for 2 components approx. 5,5 kg approx. 5,5 kg
Mixing head weight for 3 components approx. 6,7 kg approx. 6,7 kg
Mixing ratio of 100 : 1 to 1 : 100 continuously adjustable
Selectable mixer speed continuously adjustable from 1 – 6,000 rpm
* Depending on the mixing ratios, material viscosities and the adaptation of pumps, hoses and mixing elements.

Description

  • Sensor-controlled 2- / 3-component mixing head with high-pressure water rinsing and dynamic mixing for liquid to highly viscous polymeric reactive materials for seal foaming, bonding and potting processes
  • High-pressure water rinsing for ecological cleaning of the mixing system using high-pressure needle valves for rinsing water injection
  • Alternative component rinsing (for the use of non-reactive components)
  • Servopneumatically and hydromechanically controlled precision recirculation valves for precise dosing
  • Can also be equipped with stub lines for bonding or potting applications
  • Weight-reduced construction of a modular design, blue-gray anodized
  • Size-optimized, functional V design to increase the degrees of freedom
  • Robust and maintenance-free design made of high-strength aluminum alloy and chrome steel
  • Direct stack injection of the components
  • Electronically adjustable mixer speed
  • Special mixer design enables gentle material mixing
  • Blowing air needle valve for drying the mixing system
  • Low-drip, low-maintenance nozzle shut-off system STOP-DROP DVS 3
  • DVS 3 stroke can be easily adjusted by means of an adjusting wheel
  • Material pressure measurement on the dosing valve
  • Mixing chamber temperature sensor

 

Options

  • Mixing head housing made of chrome steel
  • Customer-specific outlet nozzles
  • Spraying system
  • Mixing head temperature control

Rear view of mounting bracket and valve cluster

Adjusting wheel for stroke adjustment of the nozzle shut-off system DVS 3

Optionally also available in a version with stub valves

MK 800 / MK 825 PRO

Sensor-controlled 2- / 3-component mixing head with high-pressure water rinsing, dynamic mixing and sensor-monitored needle position of the dosing valve

 

 

Technical Data*
  MK 800 PRO MK 825 PRO
Dimensions (H x B x D) 2C mixing head 272 x 204 x 150 mm 272 x 204 x 150 mm
Dimensions (H x B x D) 3C mixing head 272 x 204 x 202 mm 272 x 204 x 202 mm
Operating pressure up to approx. 20 bar up to approx. 20 bar
Discharge rate 3,0 to 100 g/s 0,2 to 3,0 g/s
Dispense accuracy ±1 % ±1 %
Mixing head weight for 2 components approx. 5,5 kg approx. 5,5 kg
Mixing head weight for 3 components approx. 6,7 kg approx. 6,7 kg
Mixing ratio of 100 : 1 to 1 : 100 continuously adjustable
Selectable mixer speed continuously adjustable from 1 – 6,000 rpm
* Depending on the mixing ratios, material viscosities and the adaptation of pumps, hoses and mixing elements

Description

  • Sensor-controlled 2- / 3-component mixing head with high-pressure water rinsing and dynamic mixing for liquid to highly viscous polymeric reactive materials for seal foaming, bonding and potting processes
  • High-pressure water rinsing for ecological cleaning of the mixing system using high-pressure needle valves for rinsing water injection
  • Alternative component rinsing (for the use of non-reactive components)
  • Servopneumatically and hydromechanically controlled precision recirculation valves for precise dosing
  • Can also be equipped with stub lines for bonding or potting applications
  • Weight-reduced construction of a modular design, blue-gray anodized
  • Size-optimized, functional V design to increase the degrees of freedom
  • Robust and maintenance-free design made of high-strength aluminum alloy and chrome steel
  • Direct stack injection of the components
  • Electronically adjustable mixer speed
  • Special mixer design enables gentle material mixing
  • Blowing air needle valve for drying the mixing system
  • Low-drip, low-maintenance nozzle shut-off system STOP-DROP DVS 3
  • DVS 3 stroke adjustment is automatically carried out via the control system
  • Sensor-monitored axial position of the agitator shaft
  • Material pressure measurement on the dosing valve
  • Mixing chamber temperature sensor
  • Sensor-monitored needle position of the dosing valve

Options

  • Mixing head housing made of chrome steel
  • Customer-specific outlet nozzles
  • Spraying system
  • Mixing head temperature control

Stepper motor for automatic adjustment of the nozzle shut-off system DVS 3

Optionally also available in a version with stub valves