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Crown, 2.5 36:1 LD, 2015, 2.5" Diameter, 36:1 L/D, 75 HP, High Heat

Crown, 2.5 36:1 LD, 2015, 2.5" Diameter, 36:1 L/D, 75 HP, High Heat

Description

  1. Overview
    1. Type: Extruders - single screw
    2. Category: Extruders
    3. Brand: Crown
    4. Model: 2.5 36:1 L/D
    5. Year: 2015
    6. Excellent condition
    7. Rebuilt to specification by Crown in 2015
    8. Barely used since
    9. Decommissioned for larger machine
  2. Application Information
    1. Materials: Compounding high temperature materials
    2. Feedstock forms: Various
    3. Process: Extrusion
    4. Expected rate: 10-200 kgs/hour
    5. Power supply: 480 VAC/3PH/60 Hz
    6. Extruder specification: 2.5 in diameter; 36:1 L/D ratio
  3. Base Frame
    1. Unitized welded steel construction
    2. Fabricated steel barrel supports
    3. Lifting provisions
    4. 40 in barrel centerline
  4. Gear Reduction Unit
    1. Fabricated steel housing with thrust assembly
    2. Heat treated double helical gears
    3. Spherical roller shaft support bearings
    4. Tapered roller thrust bearing
    5. Oversized HP rating
    6. Required total gear ratio to provide 140 screw RPM
    7. Forced lubrication system with external motor driven pump, shell and tube heat exchanger, external filter and strainer, electrically interlocked flow switch, thermometer
    8. Mechanically protected with a special torque-limiting clutch
  5. Feed Section
    1. Fabricated steel construction
    2. Rectangular feed opening on the screw centerline
    3. Jacketed and pre-piped for water cooling
  6. Cylinder Barrel
    1. Alloy steel cylinder with bimetallic lining
    2. Downstream clamp flange
    3. Designed for 10,000 psi maximum pressure
    4. Barrel is tapped for thermocouples and pressure indicator
    5. Rupture disc
  7. Feed Screw
    1. 4140 heat-treated forged carbon steel
    2. Multi-stage screw properly designed
    3. Modification supplied as follows: 0.001 in to 0.0015 in chrome plating Colmonoy #56 hard surfaced flight land
  8. Heating/Cooling System - Water Cooled
    1. Five barrel zones
    2. Resistance type, cast bronze heaters with cast-in Incoloy stainless steel cooling coils
    3. Each zone is equipped with thermocouples
    4. Closed loop cooling system with stainless steel tank, shell and tube heat exchanger (oversized), motor driven pump, solenoid actuated valves and needle valves, completely prepiped
    5. Electrical equipment is prewired NEMA type 12 terminal box
  9. Basic Extruder Power Supply Drive - AC Drive: 75 HP
    1. Standard features including UL and CUL, 4 line by 20 character multilingual alphanumeric display, intelligent start-up assistant, motor ID run, motor control with direct torque control and scalar control, adaptive programming with 15 logic controller type function blocks, 2 programmable analog outputs, 3 programmable analog inputs, 7 digital inputs (6 programmable and 1 dedicated start interlock), adjustable filters on analog inputs and outputs, input speed signals (2 current 0-20 mA and 1 voltage +/- 0-10 VDC), start/stop (2 wire control and 3 wire control), adjustable current limit, adjustable torque limit, 9 supervision functions, electronic reverse, DC magnetizing start, flux braking, 15 preset speeds, self-tuning speed controller, automatic reset customer selectable, 2 independently adjustable accel and decel ramps, ramp to stop or coast to a stop, maximum frequency programmable up to 300 Hz, integral programmable PID setpoint controller, master/follower
    2. Programmable fault functions