1997 Dual 50 pound Sterling Davis-Standard blow molder - $1.8 million replacement cost !!!
* Space-saving Double-Double configuration
* Get the production capability, output, and versatility of having two individual 50 pound machines !!!

This 1997 Sterling Davis-Standard accumulator head blow molding machine is a space-saving blow molder that houses two independent machines 
in a single machine frame.

The Sterling Double-Double has two extruders, two accumulator heads, and two clamp units that all share a common frame, all operated by 
one central microprocessor control system.

In addition to saving valuable factory floor with it's space-saving design, the Double-Double can produce dissimilar parts, or parts in 
different colors or using different materials on a single machine with a single operator.

* dual 300HP 6 inch extruders for extra plasticizing and production output
* dual 50 pound accumulator heads
* each extruder feeds it's own 50 pound accumulator head, and each head is positioned over it's own clamp
* dual clamps, each with 60 inch wide x 84 inch long clear platens
* roll-out style clamp design for easy mold changes
* dual part take outs

FEATURES AND SPECIFICATIONS:

* CLAMP TONNAGE: TWO CLAMPS, EACH HAS 180 TONS CLAMPING PRESSURE
* EXTRUDER SIZE: TWO 6 INCH DIAMETER, 24:1 L:D EXTRUDERS
* EXTRUDER DRIVE: 300HP ON EACH EXTRUDER
* SHOT SIZE: TWO SINGLE HEADS, 50 POUNDS (22.7 kg) HDPE PER HEAD
* PLATEN SIZE: TWO PRESS SECTIONS, EACH HAS 60 INCH WIDE BY 84 INCH LONG CLEAR PLATENS
* CONTROLS: BARBER COLEMAN MACO 6500 
* DUAL CHANNEL 100 POINT PARISON PROGRAMMER
* TWO AUTOMATIC PART TAKE OUTS FOR UNLIMITED PRESS ACCESS
* TWO ROLL-OUT PRESS SECTIONS FOR EASY MOLD CHANGES AND ACCESS
* 4.5 TO 24 INCH TOOLING RANGE 

* 72 inch maximum clamp open daylight 
* 16 inch minimum clamp closed daylight
* Vertical platen height adjustment     +/- 4 inches
* Side to side platen adjustment         +/- 5 inches
* Front to back platen adjustment       +/- 5 inches
* Manual press shut height adjustment


Additional specifications:

TWO EXTRUDER SECTIONS, each having:
* Model 360 gear reducer with mechanical rating of 400HP at 100 RPM screw speed
* Continuous extrusion
* High performance feed screw with Colmonoy 56 hard surface flights 
* Sterling barrel assembly fabricated of 4140 alloy steel with bimetallic inlay of Xaloy 102 or equivalent 
  and a bolt type front flange.
* Cast aluminum heaters with integral cooling coils.
* Closed loop cooling system.
* Rupture disk, pressure reducer and indicator.

TWO ACCUMULATOR HEADS, each having:
* First in, first out material flow
* Common shooting ring and six push rods
* One servo valve and DCDC transducer per head
* Individual control of flow (speed) of accumulator shooting with digital readout

TWO CLAMP SECTIONS, each having:
* Relative platen speed   1200 inches per minute
* Mechanical adjustable stops to perform as movable guide rods 

MICROPROCESSOR MACHINE CONTROL:
* Maco 6500
* Touch-Trol operator station
     Remote and accessible with swing-away feature
     Set-up operation control buttons and switches
     Ammeter, tachometer, and speed control for DC drive
     Pressure indicator
* System/ Insta-set module
* Sequence module
* Five heat/cool module - six zones
* Temperature heat only modules - three 4-zones
* Linear positioning
* Multi-parameter process control speed for parison drop
* Pressure flow module
* Cabinet is provided with space for a maximum of 15 modules

MAIN ELECTRICAL CONTROL PANEL:
* Three door construction
* Motor starter for main hydraulic AC motor
* Ammeters on each heater zone for heater burn-out detection
* Mercury contactors with circuit breakers on heater zones
* Isolation transformer for microprocessor
* Main disconnect switch
* DC drive controls
* Panel climate control devise
* Voltage regulator

TWO PROPORTIONAL HYDRAULIC POWER UNITS, each having:
* 100 gallon tank capacity
* 60HP AC motor
* Pre-piped and pre-wired
* Single head operation
* Return line filtration 10 micron
* Heat exchanger 13 HP with inlet temperature of 85F and oil flow of 8 GPM
* Independent recirculating system for hydraulic heat exchangers with independent pump and motor
* Four (4) 10-gallon accumulators
* Pump pressure compensated and fixed 32.8 GPM
* Necessary valves for blow mold operation of press and head
* Shooting and clamp manifolds for valve mounting
* Electronic control system
* Proportional tonnage control

MAIN BASE HOUSES THE FOLLOWING:
* Two extruders
* Two accumulator heads
* Two hydraulic units
* One control cabinet
* Two press sections

TWO AIR BLOW SYSTEMS, each having:
* 12 stations

PRIMARY POWER WIRING:
- Maco 6500 is designed to operate from a 102-132 VAC, 50/60 Hz, single phase power source.  
Each module contains its own power supply which provides all operating voltages for the module 
circuitry.  Control equipment should not be connected to power sources subject to extreme voltage 
fluctuations caused by switching heavy loads. A voltage step-down isolation or voltage regulation 
transformer installed in the control cabinet is supplied.