Kombiplast KP Two-Stage Compounder

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Compounding and pelletizing of PVC, cable and special compounds

PVC, cable and special compounds can only be processed economically with a reliable compounding and pelletizing technology. The Kombiplast from Coperion meets this demand in all respects. Coperion designed the compounding system especially for the production of temperature and shear-sensitive plastics – so that you can benefit from highest product quality, maximum economy and flexibility.

The Kombiplast KP combines a twin screw extruder ZSK with a single-screw discharge screw ES-A for gentle pressure build-up of shear-sensitive products.

Coperion specializes in the designing and building of complete turnkey plants for the compounding and pelletizing of PVC, cable and special compounds. Coperion's two-stage compounding systems Kombiplast KP are equipped with volumetric feeders, vacuum degassing and a pelletizer.

Key benefits of the Kombiplast KP

  • Excellent feeding characteristics, even with poorly flowing powders and hot premixes from the high-speed mixer
  • Good homogenization and controlled shearing at uniform product stress
  • Short residence time and defined narrow residence time distribution
  • Exact temperature control
  • Efficient removal of volatile matter
  • Gentle product treatment, especially in the pressure build-up zone before the die plate
  • Uniform product flow through the die plate
  • Low specific energy requirement
  • Wide range of applications
  • Easy adaptation to new requirements
  • Fast, convenient cleaning possibility
  • High availability
  • Cost-effective maintenance
  • Maintenance-friendly machine set-up

Related Industries

  • Plastics

Typical areas of application of the Kombiplast

Plasticized PVC

  • PVC cable: insulation, sheathing, and filled compounds
  • Shoe and shoe sole material (also PVC-P with blowing agent)
  • Extrusion materials for profiles and hoses (including medical applications)
  • Injection molding compounds
  • Film and sheets for flooring

Rigid PVC

  • Extruded profiles for interior and exterior uses
  • Injection molding grades for fittings, etc.
  • Blow molding grades such as bottles, containers, etc.
  • Alloys and blends
  • Films (calender feeding)

Special compounds

  • Halogen-free, self-extinguishing formulations for cable (HFFR)
  • Compounds for elastomer-based low, medium, and high tension cable
  • Cross-linkable PE (incorporating peroxide)

Principle of the Kombiplast KP

  1. Twin-screw side feeder ZS-B
  2. Twin-screw compounder ZSK
  3. Single-discharge screw ES-A
  4. Eccentric pelletizer EGR
  5. Degassing
  6. Vacuum degassing

Kombiplast PVC/HFFR hybrid

The Kombiplast PVC/HFFR hybrid systems are a special version of the Kombiplast. These enable PVC pellets or halogen-free, flame-retardant (HFFR) compounds to be produced economically for the cable industry.

Only a few changes to the Kombiplast PVC/HFFR hybrid are necessary to change products from PVC to HFFR or vice versa. The change can be made within 2 hours depending on the equipment in the plant and the machine size.

Technical data of the Kombiplast with ZSK Mv PLUS and ZSK Mc¹⁸

Kombiplast ZSK/ES-A Max. torque per shaft [Nm] Specific torque Md/a³ [Nm/cm³] Max. screw speed [rpm] Max. motor power N [kW] Screw diameter [mm]
KP 27 Mv PLUS / 60 100/400 10.6 600/115 13/4 27/60
KP 34 Mv PLUS / 100 205/1,200 11.3 600/100 27/15 34/100
KP 43 Mv PLUS / 150 420/4,050 11.3 600/75 55/45 43/150
KP 54 Mv PLUS / 150 815/4,050 11.3 600/75 108/45 54/150
KP 62 Mv PLUS / 200 1,250/9,600 11.3 600/75 165/80 62/200
KP 76 Mv PLUS / 250 2,275/18,750 11.3 600/50 300/125 76/250
KP 98 Mv PLUS / 300 5,000/32,400 11.3 400/50 440/180 98/300
KP 125 Mv PLUS / 350 10,300/51,450 11.3 400/50 906/285 125/350

 

Kombiplast ZSK/ES-A Max. torque per shaft [Nm] Specific torque Md/a³ [Nm/cm³] Max. screw speed [rpm] Max. motor power N [kW] Screw diameter [mm]
KP 26 Mc18 / 60 140/400 15 600/115 18/4 25/60
KP 32 Mc18 / 100 315/1,300 18 600/100 42/15 32/100
KP 45 Mc18 / 100 930/1,300 18 600/100 123/15 45/100
KP 58 Mc18 / 150 2,000/8,000 18 600/75 264/45 58/150
KP 70 Mc18 / 200 3,500/15,000 18 600/75 462/66 70/200
KP 92 Mc18 / 250 7,500/30,000 17 600/50 990/100 92/250
KP 92 Mc18 / 300 7,500/55,000 17 600/50 990/150 92/300
KP 119 Mc18 / 300 15,300/55,000 17 400/50 1,346/150 118/300
KP 133 Mc PLUS / 350 20,000/80,000 15 400/50 1,759/170 133/350

 

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