
5.3 Precharging the Hot Runner..........................................................................................................................................57
5.4 Producing Test Parts.........................................................................................................................................................58
Chapter 6: Maintenance...................................................................................................................................61
6.1 Scheduled and Non-Scheduled Maintenance........................................................................................................61
6.1.1 Preventive Maintenance.................................................................................................................................62
6.1.2 Service Procedures...........................................................................................................................................62
6.2 Removing and Installing Nozzle Stacks.....................................................................................................................63
6.2.1 Removing the Nozzle Stack...........................................................................................................................63
6.2.2 Installing the Nozzle Stack.............................................................................................................................63
6.3 Changing the Resin Color...............................................................................................................................................66
6.4 Extending Nozzle and Sprue Heater Wire Leads....................................................................................................67
6.5 Removing and Installing the Hydraulic Actuator ................................................................................................. 69
6.5.1 Removing the Hydraulic Actuator from the Manifold.........................................................................69
6.5.2 Installing the Hydraulic Actuator on the Manifold...............................................................................70
6.6 Removing and Installing the Pneumatic Actuator ...............................................................................................72
6.6.1 Removing the Pneumatic Actuator from the Manifold...................................................................... 72
6.6.2 Installing the Pneumatic Actuator to the Manifold..............................................................................73
6.7 Adjusting the Valve Stem Preload for Hydraulic Actuators................................................................................74
6.8 Replacing the Hydraulic and Pneumatic Seals....................................................................................................... 78
6.9 Removing and Installing Valve Stems........................................................................................................................78
6.9.1 Removing a Valve Stem..................................................................................................................................78
6.9.2 Installing a Valve Stem....................................................................................................................................79
6.10 Removing and Installing Nozzle Heaters............................................................................................................... 79
6.10.1 Removing and Installing Ultra Nozzle Heaters (UNH) on U750 Systems................................... 80
6.10.1.1 Removing Ultra Nozzle Heaters (UNH) on U750 Systems...............................................80
6.10.1.2 Installing Ultra Nozzle Heaters (UNH) on U750 Systems.................................................80
6.10.2 Removing and Installing Ultra Nozzle Heaters (UNH) With Ring Thermocouples..................83
6.10.2.1 Removing Ultra Nozzle Heaters (UNH) With Ring Thermocouples............................. 83
6.10.2.2 Installing Ultra Nozzle Heaters (UNH) With Ring Thermocouples............................... 84
6.10.3 Removing and Installing Bi-Metal Heaters on U750 and U1000 Systems................................. 89
6.10.3.1 Removing Bi-Metal Nozzle Heaters on U750 and U1000 Systems...............................89
6.10.3.2 Installing Bi-Metal Nozzle Heaters on U750 and U1000 Systems.................................89
6.10.4 Removing and Installing Triton Heaters on U750-UP Systems......................................................92
6.10.4.1 Removing Triton Nozzle Heaters on U750-UP Systems...................................................92
6.10.4.2 Installing Triton Nozzle Heaters on U750-UP Systems.....................................................93
6.10.5 Removing and Installing HTM Nozzle Heaters for U1000 Systems.............................................. 95
6.11 Replacing the Hydraulic or Pneumatic Manifold Hoses ...................................................................................95
6.12 Grounding the Unify System...................................................................................................................................... 96
6.13 Testing Heaters................................................................................................................................................................ 97
6.14 Removing and Installing the Cavity Plate.............................................................................................................. 97
6.14.1 Removing the Cavity Plate On a Work Bench...................................................................................... 98
6.14.2 Installing the Cavity Plate On a Work Bench........................................................................................ 99
6.14.3 Removing the Cavity Plate In the Machine........................................................................................ 101
6.14.4 Installing the Cavity Plate In the Machine.......................................................................................... 103
6.15 Inspecting and Cleaning Manifolds.......................................................................................................................104
6.15.1 Cleaning Using a Fluidized Bed Process.............................................................................................. 105
6.15.1.1 Assistance...................................................................................................................................... 106
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