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Fabricar: Sterling Tamaño del archivo: 1.53 mb Nombre del archivo: Idioma del manual:

1. Turn the main disconnect to the ON position. 2. Start the granulator by pressing the start button at the operator station. 3. Load feedstock at a uniform rate that does not exceed the capacity of the machine; see Table 1: Granulator Specifications. 4. For color and/or material changes, allow all existing material to clear the granulator and any downstream equipment before stopping the machine. Doing so reduces cleaning requirements. 4-4 Cleaning Out the Granulator To open the granulator and obtain access to the cutting chamber and base for cleanout, follow these steps: 1. Shut OFF and LOCK OUT all power including the main disconnect switch. 2. Open the cutting chamber doors. 3. Loosen the hand knobs on the segregation chambers and swing down. Lift up from rear mounting bar and remove for easy cleaning. 4. After cleaning each segregation chamber, replace in its former position on the cutting chamber. Swing hand knob into position and tighten securely. Page 24 ! CAUTION ! Never close the chamber access doors without checking that all three (3) segregation chambers are in place and hand knobs are tight. Never attempt to runmachine without all three (3) segregation chambers in place and tightened. Always wear heavy gloves and exercise care when working in the cuttingchamber. 4-5 Shutdown Conditions 4-5-1 Emergency Stops Feedstock must be cleaned out of the hopper and cutting chamber prior to restarting. 4-5-2 Temporary Machine Stops To temporarily stop the machine, first allow all material to run out of the cutting chamber. Never try to restart the machine with material remaining inside the cutting chamber. 4-5-3 Final Machine Stops To shut the machine down, allow all material to pass through the transition before pressing the STOP pushbutton to stop the machine. ! CAUTION ! This model series of granulator is NOT designed to grind purgings, large chunksof solid plastic, or other heavy cross-sectional pieces. Page 25 Maintenance 5-1 Maintaining Drive Components For continuing reliable operation of the granulator, it is of the utmost importance that the motor drive belt tension is correct. Correct tension reduces wear on the rotor and motor bearings and reduces slip to a minimum. Belt drives must be tensioned at the “Run-In” recommended force. Check the tension at least twice during the first two days’ operation. After the belts have seated themselves in the sheave grooves and the initial stretch is removed, re-tension the belts to the “Normal Running” recommended force. A gauge is available from customer service or the belt manufacturer which facilitates the measurement of belt deflection and force. The Belt Tensioning Chart in Figure 1 gives the recommended force required to deflect teach belt by an amount equal to the belt span divided by 64. The Deflection Force Value relates to a single V-belt element. 1. Verify that the alignment of the sprockets is correct. Using a straightedge of sufficient length to span from one sprocket to the other, place it along the sides of both sprockets. The entire edge of each sprocket should contact the straightedge. 2. Measure the timing belt sag. See Figure 1. 3. Determine the force required to deflect one belt 1/64” (0.40 mm) per 1 inch (25.4 mm) of span length as follows: a. Measure span length (t) of your drive. b. At the center of span (t), apply a force perpendicular to the span large enough to deflect one belt on the drive 1/64” (0.40 mm) span length from its normal position. 4. Compare this deflection force with range of forces in the Belt Tensioning Chart as follows: a. If it is less than the minimum recommended force, belts should be tightened. b. If it is more than the maximum recommended deflection force, the drive is as tight as it needs to be. Page 26 Figure 1: Belt Tensioning Chart Design HP New Belt Used Belt Min Max Min Max 1 442 443 438 440 2 466 469 459 462 3 490 495 480 485 Belt Span Deflection = Belt Span 64 5-2 Replacing Timing Belts 1. Remove the guard cover. 2. Find and loosen the two (2) interior guard plate screws near the gearmotor timing belt drive from inside the sprocket guard housing. 3. Loosen the gear motor hold-down screws and move the motor towards the granulator rotor to allow more slack in the belt. 4. Remove the old timing belt. 5. Install the new timing belt over the sprockets. 6. Move the motor back from the granulator to reduce belt sag. 7. Verify the alignment between the gear motor and rotor sprockets; then tighten the gear motor hold-down screws. 8. Adjust the interior guard plate to re-center the opening around the gearmotor shaft and tighten the two (2) mounting screws. 9. Replace the guard cover. 5-3 Lubrication Specifications and Considerations All beside-the-press granulators and accessories are supplied with bearings that are pre-lubricated at the factory. Mounting the bearings external to the cutting chamber results in low maintenance and trouble-free operation. The bearings used require a high quality, lithium-based EP (ex...

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