Rexroth A2VK12’s
Motor City Composites

CANNON Polyurethane Technology






Following material taken from original Cannon Manual.

Any section will be provided upon request.


1.0       Technical Description and Theory

2.0       Open

3.0       Machine Specifications

4.0           Installation and Startup Information

§  Pre-Startup Information –Installation Requirements

§  Startup Procedures

§  Calibration Procedures

5.0       Maintenance / Troubleshooting Description of operation

6.0       Machine Controls

§  IRD Controller Manual

§  Control Panel

§  PLC Interface

§  PLC Program

7.0       Wiring Diagram

            Chemical Flow Control

§ FPL 14 with Adjestable device Mixhead

§ DN-16 Diverter Valve

9.0               Rexroth A2VK12 Metering Pumping System

10.0            Rexroth Mixhead Hydraulic Unit

11.0            Tank Group

12.0            Cannon Supplied Optional Equipment

13.0            Auxiliary Equipment

§  Thermal Care Accuchiller – Air cooled 5 ton

§  Cuno Self Cleaning Filter

14.0            Assorted Engineering Drawings

§  Control Panel Assembly

§  Metering Machine and Tank Flow Schematics

§  General Metering Machine Arrangement

§  Tank Group Drawings

§  Metering Machine Bill of Materials

15.0       Suggested Spare Parts Listing


General Machine Description


            A-20 Standard Controls

A self-contained control panel will be mounted on the metering unit frame and will contain the following items:

                      Upper Control Panel


Cincinnati operator interface keypad I.R.D.

Chemical temperature controllers


                      Lower Control Panel


·       SLC 5/02

·       Low suction pressure indicator

·       High outlet pressure indicator

·       Low hydraulic pressure indicator

·       Power control switch

·       Metering pump start button

·       Hydraulic unit power switch

·       Cycle selector switch

·       Emergency stop button

·       Metering pump stop button

·       Calibration switch

·       Reset button







Wet System General Specification



                        One (1) CANNON USA A-100 Standard high pressure metering machine is designed to process a two (2) component, unfilled polyurethane system.  Metering is a accomplished by two (2) Rexroth positive displacement axial piston pumps driven by one (1) induction motor.  Temperature conditioning is by means of shell and tube heat exchangers and jacket day tanks fitted with electrical immersion heaters and cooling water demand solenoids.


                        Each component is stored in 87 gallon tanks.  The tanks are pressurized with dry air.  Each chemical flows by "blanket" pressure from the tank through an inline component filter to the metering pump. 


                        Mixing is by the impingement principle with a hydraulically operated self-cleaning mixhead.  The hydraulic power is supplied from a self contained hydraulic power unit complete with pump, motor, reservoir and heat exchanger.  The hydraulic power unit is mounted on the metering frame.  The hydraulic head actuation is controlled by double hydraulic valves.


                      Monitoring of each component flow rate and ratio of the components is accomplished by the I.R.D (Instant Ratio Detector).  The flow rates and ratio of the components is measured by means of high precision flow transducers mounted between the metering pumps and diverter valves.









Process Data Based on original Chemical Data




                        Output (1.0 S.G., 1:1 ratio)       600/1200 rpm                 6.0 TO 59 lbs/min

                                                                                                                 @1:1ratio @1.0 S.G.


                        Ratio                                          5:1 –1:1 – 1:5        Stepless Adjustment,@1.0 S.G.


                        Process Temperature                80-90 degree F                        80-90 degree F


                        Metering Accuracy                   +/- .05%


                        Component                                +/- 2 degree f.




Work Tank Specifications



                      Chemical components are stored in pressurized tanks.  Chemical conditioning in the tank is achieved with electrical resistance heaters located at the bottom of each tank, and with the use of external chilled water.



                    Four Capacitance level controls are mounted on the tank to control replenishment of        materials form customer's drum stock or bulk storage plant and to signal for high and low level alarms.







§  Reservoir capacity: 87 gal ea.


§  ASME Pressure rating:150 PSI


§  Component heating capacity: 3 Kw each


§  Component cooling capacity: 5 ton air cooled chiller


§  Capacitance levels: Full range with full indicator ( levels per tank)


§  Air requirements: 90-120 psi regulator.


§  Poly Heat Exchanger Shell and tube exchanger.


§  ISO Heat Exchanger Shell and tube exchanger.


§  Water flowRequirements:  25GPM




Metering Machine Specification


                         The CANNON USA A-20 STANDARD comprises a high pressure metering     unit utilizing positive displacement axial piston pumps to generate high pressure mixing.


                        A-20 STANDARD Specification


                                     -          Output @ 1.0 S.G., 1:1 ratio            438 gram/sec @ 900 Rpm

                                                876 gram/sec @ 1800 Rpm

                                     -          Ratio adjustment       5:1-1:1-1:5 stepless

                                                          adjustment @ 1.0

                                                             specific gravity

                                     -          Metering Accuracy                        +/- 0.5%

                                     -          Component Heating        3.0 Kw/component

                                     -          Component Cooling                 By Customer

                                     -          Motor Size                             10 Hp

                                     -          Pump Size, Poly          A2VK12 Rexroth

                                     -          Pump Size, Iso          A2VK12 Rexroth

                                     -          Temperature Control         Shell & Tube heat


                                     -          Filter       Self cleaning Cuno

                                     -          Mixhead Hydraulic Unit            7.5 Hp, 2.6 Gpm

                                     -          Power Requirement             460 V, 60 Hz, 3

                                                            phase, 100 Amp


                                                Air Requirement                     90-120 Psi

                                                Water Flow Requirement                 By Customer




Instant Ratio Detection System


  Cincinnati Electrosystems Greyline 2000 Series Workstation.




Piping Manifold Specification


                      The manifold system consist of the framework, piping, fittings, valves and conduit, which provides the pressurized delivery of the chemical components, hydraulic fluid and electrical signals to one (1) FPL-14 mixing heads.


                      The manifold will consist of the following:


-        Floor mounted support frames

-        High pressure carbon steel seamless tubing for feed and return of the chemical components and hydraulic fluid.

-        Tubing insulation for chemical lines

-        Dual mixhead hydraulic valves

-        Accumulator for mixhead hydraulic system

-        Pressure guages

-        Electrical raceway

-         Electrical junction box




FPL Mixhead


The FPL mixhead is mechanically self-cleaning high pressure mixhead capable of free pour, open mold dispense or fixed to a closed mold for injection.


The FPL mixhead has two (2) chambers, the mix chamber and the output chamber.  Each chamber has its own clean-out piston.  The mix chamber is located at a 90 degree angle to the outpour chamber.  The sequence of movement during a shot is as follows:


1.         Cleanout chamber piston retract - beginning of pour.

2.         Mix chamber piston retract      pouring occurs

3.         Mix chamber piston closes     pouring stops

4.         Cleanout chamber piston closes -end of pour




Minimum total components output @ 1:1 ratio:

                                               100 cc/sec total (both components)


Maximum total components output @ 1:1 ratio:

           600 cc/sec total (both components)


    Component maximum working pressure: 3000 Psi




Mixhead Hydraulics


The mix piston and cleanout piston movements are controlled hydraulically.  The operation of each piston is controlled independently from the other by the use of a double hydraulic valve set-up.  Each piston is fitted with a proximity sensor for detection of the piston in the open position.




Electrical Requirements


Electrical Power: 460V, 60Hz, 3 Phase

Service Amps: 100A

450A main disconnect (to service entire system)

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