Where it all comes together: The mixing heads

Reliable mixing of demanding material formulations

 

A multi-component mixing head has three essential functions. First, to control the quantity to be dispensed exactly via the inbuilt valve technology; second to bring the material exactly to the right point through the dispensing nozzle. The third and most difficult function, however, is to mix the material components as well as possible just before application – homogenisation – and that using a predetermined, exact ratio.

 

For material systems with simple mixing ratios and wide processing tolerance a static mixer is adequate. Here the two material components must be pressed singly through a mixing tube in their correct quantities. The interior baffles of the mixing tube cause so much turbulence in the material stream that satisfactory mixing is achieved.

Dynamic mixing systems for hug requirements

Many industrial applications, however, require highly complex mixing systems, which go beyond the capabilities of static mixers. Here dynamic mixing systems are needed in order to make up these tricky recipes reliably enough for industrial production.

Here fluid to highly viscous reaction substances can be used. Depending on the mixing head, discharge capacities of 0.1 to 100 g/s are possible. Continuous mixing ratios from 100:1 to 1:100 are available. And that with an extremely high accuracy in the dispensing quantity of approx. +/- 1%. These values can vary, depending on the mixing ratio, material viscosity and the adaptation of pumps, tubes and mixing elements. Characteristics of the materials such as reactivity and abrasiveness play a large role here.

Because of this, Sonderhoff offers you various mixing head designs, from the simple MK 20 with static mixing to our reference models from the MK 600 series. The latter are suited not only for our low-pressure technology for the application of mixed-cell foam, but also for FERMAPOR® K31 CC medium-pressure closed-cell foam.

MK 600 / MK 625 / MK 650

The reference class that does not shy away from a comparison

Sensor-controlled 2- / 3- component mixing head with high-pressure water rinsing and dynamic mixing system, for use with liquid to highly-viscous polymer reactive materials for gasketing, glueing and potting.

Download product brochure MK 600 / MK 625 / MK  650

Technical Spezifications
MK 600 MK 625 MK 650
Dimensions (H x W x D) 2-component mixing head: 235 x 200 x 130 mm 220 x 200 x 130 mm 182 x 160 x 148 mm
Dimensions (H x W x D) 3-component mixing head_ 235 x 200 x 175 mm 220 x 200 x 175 mm 182 x 160 x 178 mm
Operating pressure:* up to approx. 20 bar up to approx. 20 bar up to approx. 20 bar
Output capacity:* 3,0 g/s to 100 g/s 0,2 g/s to 3,0 g/s 0,05 g/s to 0,2 g/s
Dosing accuracy:* approx. ± 1 % approx. ± 1 % approx. ± 1 %
Mixing head weight for 2-components: approx. 5,9 kg approx. 5,5 kg approx. 2,5 kg
Mixing head weight for 3-components: approx. 7,1 kg approx. 6,7 kg approx. 3,0 kg
Mixing ratio:* from 100 : 1 to 1 : 100, infinitely variable
Selectable stirrer-speed:* from 1 to 4.500 rpm or 1 to 6.000 rpm, infinitely variable
* in dependence of the mixing ratios, material viscosities and the adaptation of pumps, tubes and mixing elements.

Description

  • High-pressure water rinsing device for the ecologically friendly cleaning of the mixing system
  • Servo-pneumatically and hydro-mechanically regulated precision recirculation valves for the complete conditioning of the used materials
  • Weight-reduced structure in modular configuration, anodised with blue-grey finish
    Size-optimised, functional design to provide maximum operating freedom
  • Robust and maintenance-free design, made of a high-strength aluminium alloy and chrome steel
  • Direct multi-level injection of components
  • Electronically regulated stirrer speed; a special stirrer design allows materials to be handled smoothly
  • High-pressure needle bar valves for injection of rinsing water
  • Blast-air needle bar valves for the drying of the mixing system
  • Anti-drip, maintenance-free “Stop-Drop DVS-3” nozzle-shutoff device with axially adjustable drive shaft
  • Component rinsing (valid for non-reactive components)*
  • Power transmitted directly or via flexible drive shaft

Video

MK 600 being used in fully-automatic operating mode

OptionS

  • Mixing head housing completely made of chrome-steel
  • Customer-specific outlet nozzles
  • Mixing chamber spray system
  • Mixing head temperature control
MK 600, use in fully automatic production

MK 400 / MK 425

The industry standard - for (almost) every application.

2- / 3- component mixing head with patented high-pressure water rinsing system and dynamic mixing system, for use with liquid to high-viscous polymer reaction materials for gasketing, glueing and potting.

Download product brochure MK 400 / MK 425

Technical Spezifications
MK 400 MK 425
Dimensions (H x W x D) 2-component mixing head 240 x 260 x 175 mm 210 x 270 x 175 mm
Dimensions (H x W x D) 3-component mixing head 240 x 260 x 230 mm 210 x 270 x 230 mm
Operating pressure:* up to approx. 15 bar up to approx. 15 bar
Output capacity:* from 0.3 g/s to 100 g/s from 0.2 g/s to 3.0g/s
Dosing accuracy:* approx. ± 1 % approx. ± 1 %
Mixing head weight for 2-components approx. 4,6 kg approx. 4,4 kg
Mixing head weight for 3-components approx. 5,3 kg approx. 5,0 kg
Mixing ratio:* from 100 : 1 to 1 : 100, infinitely variable
Selectable stirrer-speed:* from 1 to 4.500 rpm or 1 to 6.000 rpm, infinitely variable
* in dependence of the mixing ratios, material viscosities and the adaptation of pumps, tubes and mixing elements.

Description

  • High-pressure water rinsing device for the ecologically friendly cleaning of the mixing system
  • Hydro-mechanically regulated precision recirculation valves for the complete conditioning of the used materials
  • Can also be fitted with stub cables for use in glueing and casting operations
  • Weight-reduced structure in modular configuration, anodised with blue-grey finish
    Robust and maintenance-free design in high-strength aluminium alloy and chrome steel
  • Direct multi-level injection of components
  • Electronically regulated stirrer turning speed; a special stirrer design allows to handle materials smoothly
  • High-pressure needle bar valves for injection of rinsing water
  • Blast-air needle bar valves for the drying of the mixing system
  • Anti-drip, maintenance-free “Stop-Drop DVS-3” nozzle-shutoff device with axially adjustable drive shaft
  • Component rinsing (valid for non-reactive components)*
  • Power transmitted directly or via flexible drive shaft

MK 400: High-pressure water rinsing

 

Options

  • Mixing head housing completely made of chrome-steel
  • Customer-specific outlet nozzles
  • Mixing chamber spray system
  • Mixing head temperature control
MK 400 being used in fully-automatic operating mode

MK 50 / MK 100

The entry into the dynamic mixing.

2-component mixing head with dynamic mixing for liquid to highly viscous polymeric reaction materials for sealing, bonding and potting. Designed for use with mixing and dosing systems DM 50 and DM 70 in manual or automatic production.

Download product brochure MK 50 / MK 100

Technical specifications
Dimensions (L x W x D) 230 x 160 x 250 mm
Operating pressure up to approx. 50 bar/component
Output capacity from 1 g/s to 100 g/s
Dosing accuracy approx. ± 1,5 %
Mixing head weight approx. 5 kg
Mixing ratio from 100 : 10 to 10 : 100, adjustable
Selectable stirrer-speed from 200 to 2.700 rpm

Description

  • Mixing chamber rinsing with chemical cleansing agents
  • Needle-type injector valves with stuffing-box seal
  • Weight-reduced structure for simple manual operation, anodised with blue-grey finish
  • Robust design in high-strength aluminium alloy
  • Stirrer turning speed manually adjustable
  • Injection valves for application of cleansing agents and blast air used for drying the mixing system
  • Compressed air-driven stirrer motor

MK 50 in AcTION

Manual casting of an electronic component with the MK 50 and 2-component FERMADUR casting resin

Options

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

Variants

  • MK 50: for small to medium output quantities
  • MK 100: for large output quantities
  • Manual rinsing
  • Automatic rinsing

MK 20

The basic design with static mixing

2-component mixing head with static mixing for liquid to pasty polymeric reaction materials for sealing, bonding and potting. Designed for use with all dosing and mixing systems in manual or automatic production.

Download product brochure MK 20

Technical specifications
Dimensions (L x W x D) 170 x 74 x 250 mm (without mixing tube)
Operating pressure up to approx. 150 bar/component
Output capacity from 1 g/s to 50 g/s
Dosing accuracy approx. +/- 1.5%
Mixing head weight approx. 2,5 kg
Mixing ratio 100 : 1 to 1 : 100, adjustable

Description

  • Needle-type injector valves with heavy-liquid element
  • Mixing with static mixing tube
  • Weight-reduced structure in modular configuration for simple manual operation, anodised with blue-grey finish
  • Robust maintenance-free design made of high-strength aluminium alloy and chrome steel

 

OptionS

  • Mixing head housing completely made of chrome-steel
  • Customer-specific mixing-tube adapters
  • Mixing-tube centring device with quick-change mechanism
  • Application-specific support tubes adaptable
  • Anti-drip device with heavy-liquid element
     
     

VariantS

  • MK 20: for small to medium discharge operations
  • MK 21: for large discharge operations

MK 20 in ACTION

Fig. 1: Manual application with the MK 20

Fig. 1: Automatic application with the MK 20