Precise and flawless processing of liquid silicone for injection molding

The silcomix is a compactly designed, electrically driven piston pump, metering and mixing system. It is used for continuously processing medium to high-viscosity, silicone-based media with a mixing ratio of 100:100.Metering is carried out directly from the original containers with a size of 20 or 200 l.

Features and Benefits

  • High energy efficiency through servo-electrically driven piston pumps
  • Extremely low material waste through simultaneous drum drainage and use of special supply pumps (material residual quantity in drum < 1 %)
  • User-friendly system operation thanks to 7” touch panel
  • Precise adherence to mixing ratio through synchronous switching of piston pumps (SWIPSYNC)
  • Compact, space-saving system design
  • Compatible with pallet trucks and forklifts
  • Extremely good control behaviour; even small shot sizes are possible in optimal quality
  • Flexible operation thanks to processing from 20 or 200l containers (on a chassis)
  • Process reliability thanks to data monitoring and archiving
  • Processing of abrasive media for pigment metering through special sealing technology

New Mixing Unit

DOPAG developed a new mixing unit for the LSR pump silcomix. The new design is unique on the market and simplifies operationwhile ensuring shorter setup times and greater system availability.

Click here and learn more!

Technical Specifications

Outflow rate up to 1.2 or 3.6 l/min (at max. 20 or 12 double strokes per minute and at MR 100:100, depending on viscosity)
Mixing ratio 100:100 (further ratios available on request)
Color injection metering up to 4 colors with a ratio of 0.2 - 5% each
Maximum working pressure 250 bar
Material supply 20 or 200 l
Viscosity up to 1,000,000 mPa s (higher viscosity available on request)
Operating voltage 400/230 VAC 3/N/PE / 50/60 Hz
Dimensions (D x W x H),
Lifter retracted
960 x 1,320 x 1,920 mm


The servo-electrical drive allows for the synchronous changeover between the piston metering pumps, independently of the current position of the related pump piston (Switching Point Synchronisation). This prevents the mixing ratio from shift ing due to diff erent changeover positions. An even drum drainage of the A and B component is granted by the needs-oriented automatic adjustment of the volume flows of the single components via the stroke speed of the piston metering pumps. At the same time, a special control of the servo drives significantly reduces the drop of the pressure and thus of the volume flow while also cutting down on the time required.


  • Pneumatic driven rams
  • Follower plate for 200 l containers
  • Static base support
  • Servo-electrically driven piston pumps with ‘SWIPSYNC’
  • Material pressure monitoring via pressure sensors
  • DOPAG MR40 metering calculator
  • System operation via 7” colour touch panel
  • Analogue level monitoring
  • High-pressure material supply package
  • Injection pressure sensor
  • Real-time remaining time display
  • Interface for all well-known manufacturers of injection moulding systems


  • Drum roll-in unit
  • Drum roller conveyor
  • Active, pneumatic base support
  • Removable follower plates for 20 l containers
  • Material screens for follower plates
  • Automated drum and pump ventilation
  • Mixing ratio monitoring (volume measuring cells)
  • Pigment or additive metering – up to 4 pigments/additives available
  • Empty signal for 10 l pigment supply
  • Level detector and electrical agitator for pigment container
  • Pigment/additive quantity measurement (volume flow, quantity)
  • Additional mixing units
  • Mixer cooling
  • Metering pressure monitoring at mixer with digital display
  • Special operating voltage

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