Conextru GMBH 擠出機塑料軟管GP Extruder Technology
Conextru GMBH 擠出機塑料軟管GP Extruder Technology
GP Extruder Technology
CONEXTRU GP Extruders – standard execution
Bimetallic barrel type A 110
Barrier screw technology with maddock & mixing, nitride screw with Colmonoy coated in feed section
Standard L/D ratio 37 – for lower output ranges 30 (for 45 / 60 only)
Straight grooved Feedbush design
Feedbush temperature controlled via proportional valve for throuput of cooling water
3 step Gear for short extruder length pressure lubricated, water cooled,
Asynchrony motor IP 54
Air cooled frequency controller ABB for motor
Extruder control from ABB, software execution acc. CONEXTRU design features,
Five heating cooling zones for barrel
Adapter and tool zones on demand
Melt pressure, and melt temperature measurement standard
Energy consumption display
Control interface – touch screen mounted on control box
Screw ejector
Frame with wheels & Rails, height adjustable
CONEXTRU GP Extruders – optional execution
Wear and/or corrosion resistance bimetallic barrel type AC 330, AC 250
Special screw steel (Hasteloy, stainless) for corrosive polymers
Chromium plated screws
Special screw mixing tip for good colour dispersion
Dynamic mixing screw tip for best dispersion of carbon black or blowing agent
Feedbush suitable up to 200 °C via external heating cooling unit with silicon oil – for some technical Polymers like PA, ABS, PVDF.
Synchron motor – multiple pole permanent magnet technology for highest efficiency, air cooled,
Torque motor for gearless drive, water cooled
Gear in 2 step version for higher efficiency – long version,
Gear in 3-step version for flat arrangement and low extrusion height – overhead version
Interface for grav. Dosing for output or meter weight control
Relay control version available with remote control
Interface separated on moveable column
Master slave configuration for co-extrusion application,
Control for Gear pump to achieve most stable output for special tolerances or in case of use of regrind
Control for vacuum of vacuum tank,
Control for under pressure for pipe coating with tubing process by cross head
CONEXTRU GP Extruders - Processing features
Screw & grooved bush design
Linear grooved bush & screw geometry at feed section is an optimised system to get best linearity of output / screw speed ratio. This system has constant specific output over screw speed also at high back pressure.
Special groove shape reduce the force in the compression.
Barrier screw design
Gentle plasticisation due to long due to long barrier section.
Therefore best homogeneity in temperature and melt quality, at low melt temperature.
Optimum on energy input to material.
Barrier length and gap are designed according the required output to have shear rate within the range of in-homogeneity and overeating.
Depending on Polymer CONEXTRU GmbH has a large library of screws for standard and special technical Polymers.
Mixing & Dispersion
Conextru screws have for each application the right mixing
Standard tip for coloured material
High mixing tip for virgin and colour master batch or filler master batch or blowing agent
Dynamic mixer for best carbon black dispersion in virgin PE, without overheating at same load of motor
Screws are available with exchangeable screw tips. All solutions leads always to best melt homogeneity for additive distribution and equal melt-temperature.
Drive concept - Energy consumption
Motor - gear execution – screw speed – screw geometry are an optimised system for most economical production and optimum energy input
The system is developed for max. Warrantee production rate at best Wh/kg for the processed material
Output rates
Warrantee = production = maximum 0utput at max. Screw speed.
The extruder can and should be operated at maximum screw speed to get highest efficiency in production cost.
Extruder frame & subcontracting
GP Extruder frame is built with high adjustable wheels in short version in extrusion height of 1100 mm having motor below barrel. Control box with touch screen interface is mounted on left hand side.
Special Motor gear barrel arrangements are available depending on local situation or application like overhead extruder position on high sub construction.
