Mixing heads for dynamic or static mixing and precise dosing
of polymeric reactive materials
Process-reliable mixing of demanding material formulations
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 systems for hug requirements
Many industrial applications, however, require highly complex material systems that overstrain the possibilities of static mixers. Here, dynamic mixing systems are needed to reliably process these demanding recipes for industrial production. Liquid to highly viscous polymeric reactive materials can be processed with mixing heads for dynamic mixing. They have output quantities from 0.05 to 100 g/s depending on the type of mixing head. The mixing ratio is infinitely adjustable from 100 : 1 to 1 : 100.
And all this is possible with an extremely high accuracy of ±1 % of the quantity to be applied. These values can vary depending on the mixing ratios, material viscosities and the adaptation of pumps, hoses and mixing elements. Properties such as reactivity and abrasiveness of the material also play a major role here.
For this purpose, we offer you various mixing head designs, from the simple SONDERHOFF MK 20 with static mixing to our reference models from the SONDERHOFF MK 400 series. They are used for our low-pressure mixing and dosing systems for the application of sealing foams, adhesives and potting compounds based on polyurethane or silicone.
SONDERHOFF MK 400 / MK 425
The industry standard - for (almost) every application.
2- / 3-component mixing head with dynamic mixing and high-pressure water rinsing
| SONDERHOFF MK 400 |
SONDERHOFF 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 | ± 1 % | ± 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 mixer speed | from 1 - 4.500 rpm or 1 - 6.000 rpm, infinitely variable | ||
| * In dependence of 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 use with liquid to highly viscous polymeric reactive material for sealing foam, bonding and potting
- High-pressure water rinsing for environmentally responsible cleaning of the mixing system using high-pressure needle bar valves for injection of rinsing water
- Hydro-mechanically regulated precision recirculation valves for precise dosing
- Can also be equipped with feed lines for bonding or potting applications
- Weight-reduced construction in modular design , anodized with blue-grey fi nish
- Robust and maintenance-free design, made of a high-strength aluminum alloy and chrome steel
- Direct multi-level injection of components
- Electronically regulated mixer speed
- Special mixer design allows gentle material mixing
- Blast-air needle bar valve used for drying the mixing system
- Anti-drip and maintenance-free nozzle lock system SONDERHOFF STOP-DROP DVS-3
- Component rinsing (valid for the use of non-reactive components)
Options
- Mixing head housing made of chrome-steel
- Customer-specifi c outlet nozzles
- Spray system
- Mixing head temperature control
SONDERHOFF MK 400: High-pressure water rinsing
SONDERHOFF MK 50
The entry into the dynamic mixing.
2-component mixing head with dynamic mixing
| 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 | ± 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 | ||
| * In dependence of the mixing ratios, material viscosities and the adaptation of pumps, hoses and mixing elements. | |||
Description
- 2-component mixing head with dynamic mixing for use with liquid to highly viscous polymeric reactive materials for sealing, bonding and potting, for small to medium output quantities
- Intended for use with the mixing and dosing machine SONDERHOFF DM 70 COMPACT in manual or semi-automatic production operation
- Mixing chamber rinsing with chemical cleaning agents
- Needle-type injector valves with stuffing box seal
- Weight-reduced construction for simple manual operation, anodized with blue-grey finish
- Robust design in high-strength aluminum alloy
- Mixer speed manually adjustable
- Injection valves for cleansing agents and blast air used for drying the mixing system
- Compressed air-driven mixer motor
SONDERHOFF MK 50 in AcTION
Manual potting of an electronic component with SONDERHOFF MK 50 and the 2-component casting resin SONDERHOFF FERMADUR
Options
- Mixing head housing made of chrome-steel
- Customer-specific outlet nozzles
- Spray system
- Mixing head temperature control
Variants
- Manual rinsing
- Automatic rinsing
SONDERHOFF MK 20
2-component mixing head with static mixing
| 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 | +/- 1.5% | ||
| Mixing head weight | approx. 2,5 kg | ||
| Mixing ratio | 100 : 1 to 1 : 100, adjustable | ||
| * In dependence of the mixing ratios, material viscosities and the adaptation of pumps, hoses and mixing elements. | |||
Description
- 2-component mixing head with static mixing for use with liquid to paste polymeric reactive materials for sealing, bonding and potting. Intended for use with all mixing and dosing machines in either manual or automatic production operation
- Needle-type injector valves with heavy-liquid element
- Mixing with static mixing tube
- Weight-reduced construction in modular configuration for simple manual operation, anodized with blue-grey finish
- Robust and maintenance-free design in high-strength aluminum alloy and chrome steel
OptionS
- Mixing head housing made of chrome-steel
- Customer-specific mixing-tube adapters
- Mixing-tube centering device with quick-change mechanism
- Application-specific support-tubes adaptable
VariantS
- SONDERHOFF MK 20 for small to medium output quantities
- SONDERHOFF MK 21 for large output quantities
SONDERHOFF MK 20 in ACTION
Fig. 1: Manually operated with the SONDERHOFF MK 20
Fig. 2: Automatic production application with the SONDERHOFF MK 20
