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MTF 2000
User Manual
39 pgs9.76 Mb0

AEC MTF 2000 User Manual

Tangential Feed Granulators iii
Table of Contents
CHAPTER 1: SAFETY ................................................................. 5
1-1 How to Use This Manual ............................................................................................ 5
Safety Symbols Used in this Manual.....................................................................5
1-2 General Safety Regulations........................................................................................ 6
1-3 Responsibility............................................................................................................. 6
1-4 Warnings and Precautions ......................................................................................... 7
CHAPTER 2: FUNCTIONAL DESCRIPTION.............................. 9
2-1 Models Covered in This Manual ................................................................................. 9
2-2 General Description ................................................................................................... 9
2-3 Typical Features and Components ........................................................................... 10
Hopper...............................................................................................................10
Cutting Chamber ................................................................................................ 10
Drive System...................................................................................................... 10
Discharge System .............................................................................................. 10
Base ..................................................................................................................10
2-4 Safety Features ....................................................................................................... 11
Safety Switches.................................................................................................. 11
Safety Tags........................................................................................................ 11
3-1 Uncrating the Equipment.......................................................................................... 12
3-2 Electrical Connections.............................................................................................. 13
3-3 Accessing the Cutting Chamber ............................................................................... 14
3-4 Closing the Cutting Chamber ................................................................................... 15
3-5 Initial Start-up........................................................................................................... 16
4-1 Start-up.................................................................................................................... 17
4-2 Feeding the Granulator ............................................................................................ 17
4-3 Clearing a Jammed Cutting Chamber....................................................................... 18
4-4 Shut-down ............................................................................................................... 18
5-1 Preventative Maintenance Schedule......................................................................... 19
5-2 Accessing the Hopper Clean-Out Area ..................................................................... 19
5-3 Lubrication ............................................................................................................... 20
5-4 Testing the Interlock Switches.................................................................................. 20
5-5 Replacing and Adjusting the Knives ......................................................................... 21
Knife Gap Settings ............................................................................................. 21
Rotor Knives ...................................................................................................... 22
Bed Knives......................................................................................................... 23
5-6 Sharpening the Knives ............................................................................................. 24
Rotor Knife Sharpening ...................................................................................... 24
Bed Knife Sharpening ........................................................................................ 24
Tangential Feed Granulators iv
Adjusting Belt Tension........................................................................................................ 25
5-8 Motor Drive Belt Replacement.................................................................................. 26
6-1 Introduction.............................................................................................................. 27
6-2 Electrical Faults ....................................................................................................... 28
6-3 Processing Faults .................................................................................................... 29
6-4 Mechanical Faults .................................................................................................... 30
7-1 Customer Satisfaction Warranty Program................................................................. 31
7-2 Drawings and Specifications (including Options)....................................................... 32
Features ............................................................................................................ 32
Specifications..................................................................................................... 32
Dimensions ........................................................................................................33
7-3 Illustrated Parts Breakdown...................................................................................... 34
Parts Identification Table .................................................................................... 35
7-4 Spare Parts List ....................................................................................................... 36
7-5 Typical Wiring Diagram ............................................................................................ 38
7-6 Technical Assistance ............................................................................................... 39
Parts Department ............................................................................................... 39
Service Department............................................................................................ 39
Sales Department .............................................................................................. 39
Tangential Feed Granulators Safety 5 of 39
Chapter 1: Safety
1-1 How to Use This Manual
Use this manual as a guide and reference for installing, operating, and maintaining your granulator. The purpose is to assist you in applying efficient, proven techniques that enhance equipment productivity.
This manual covers only light corrective maintenance. No other maintenance should be undertaken without first contacting a service engineer.
The Functional Description section outlines models covered, standard features, and safety features. Additional sections within the manual provide instructions for installation, pre­operational procedures, operation, preventive maintenance, and corrective maintenance.
The Installation chapter includes required data for receiving, unpacking, inspecting, and setup of the granulator. We can also provide the assistance of a factory-trained technician to help train your operator(s) for a nominal charge. This section includes instructions, checks, and adjustments that should be followed before commencing with operation of the granulator. These instructions are intended to supplement standard shop procedures performed at shift, daily, and weekly intervals.
The Operation chapter includes a description of electrical and mechanical controls, in addition to information for operating the granulator safely and efficiently.
The Maintenance chapter is intended to serve as a source of detailed assembly and disassembly instructions for those areas of the equipment requiring service. Preventive maintenance sections are included to ensure that your granulator provides excellent, long service.
The Troubleshooting chapter serves as a guide for identification of most common problems. Potential problems are listed, along with possible causes and related solutions.
The Appendix contains technical specifications, drawings, schematics, parts lists, and available options. A spare parts list with part numbers specific to your machine is provided with your shipping paperwork package. Refer to this section for a listing of spare parts for purchase. Have your serial number and model number ready when ordering.
Safety Symbols Used in this Manual
The following safety alert symbols are used to alert you to potential personal injury hazards. Obey all safety messages that follow these symbols to avoid possible injury or death.
DANGER! DANGER indicates an imminently hazardous situation that, if not avoided,
will result in death or serious injury.
WARNING! WARNING indicates a potentially hazardous situation or practice that, if
not avoided, could result in death or serious injury.
Caution! CAUTION indicates a potentially hazardous situation or practice that, if
not avoided, may result in minor or moderate injury or in property damage.
Tangential Feed Granulators Safety 6 of 39
1-2 General Safety Regulations
This machine uses knives for the performance of its intended use. Consequently, it can be a dangerous machine to operate and maintain unless these safety regulations are followed.
These regulations should be read, understood and periodically reviewed by all personnel involved in any way with this machine.
Never operate or remove any machine components that are secured by wrench-type fasteners unless the motor is electrically locked out and the rotor is motionless.
Never operate the machine or jog the rotor unless the cutting chamber covers, discharge chute, or any guards or covers are in place and secure. Do not circumvent the safety interlocks.
Prior to clearing a jam or performing any maintenance, the motor should be turned off and electrically locked out. Be sure that the rotor has come to a stop. Hands must not be inserted into the machine to clear the jam.
Do not extend any part of the body into feed roll openings or discharge area unless the motors are electrically locked out and the rotor and feed rolls are motionless.
Never extend fingers through holes in screen.
Be sure that the v-belts are properly aligned and that tension is at its maximum.
Extreme care should be taken to see that all bolts are properly tightened at all times. During the operation of the machine, rotor knife bolts may come loose. Although fine threads are used on the rotor knife bolts because vibration does not easily loosen them, you should inspect the tightness of the bolts frequently.
This machine is designed for the granulation of plastic materials. Do not feed any other materials into the machine.
1-3 Responsibility
These machines are constructed for maximum operator safety when used under standard operating conditions and when recommended instructions are followed in the maintenance and operation of the machine.
All personnel engaged in the use of the machine should become familiar with its operation as described in this manual.
Proper operation of the machine promotes safety for the operator and all workers in its vicinity.
Becoming familiar with materials, inspection, speed limitations, screens, and guard maintenance and total user responsibility will assist you in learning potential areas in need of observation for danger.
Each individual must take responsibility for observing the prescribed safety rules as outlined. All caution, warning and danger signs must be observed and obeyed. All actual or potential danger areas must be reported to your immediate supervisor.
Tangential Feed Granulators Safety 7 of 39
1-4 Warnings and Precautions
Our granulators are designed to provide safe and reliable operation when installed and operated within design specifications, following national and local safety codes.
To avoid possible personal injury or equipment damage when installing, operating, or maintaining this granulator, use good judgment and follow these safe practices:
˛ LEARN AND OBEY your company’s safety policy regarding granulating
equipment.
˛ MOVING OR LIFTING THE GRANULATOR: Although our equipment is built
and engineered for great ruggedness in operation, care must be taken when moving the machine along the floor or lifting it. Damage may occur to sheet metal covers, electrical cabinets, or small brackets if pressure is applied to them when moving the granulator. When lifting the granulator, be certain of total machine weight and the capability of the lifting equipment. (See the Granulator Specification Sheets for machine weights and dimensions.)
˛ GRANULATOR LOCATION: Adequate area for routine maintenance should be
provided in order to open the machine for knife, screen, or cleanout service. Proper service area clearances also should allow people who are working on the machine to be clearly visible to others, thereby reducing the potential safety hazards.
˛ SAFE HOUSEKEEPING: The work area must be kept clean and uncluttered during
periods of operation or maintenance. No hand tools or other metal objects should be left on or around the machine. Any tools or other metal objects that mistakenly fall into the hopper feed opening can cause severe damage to internal cutting chamber, rotor and screen components.
˛ SAFETY GLASSES OR A FACE SHIELD MUST ALWAYS BE WORN when
servicing or operating the machine. Although our machines are designed for the maximum in flyback control, caution must be used when operating near the hopper feed opening in order to guard against unexpected material flyback.
˛ EAR PROTECTION may be required when operating the machine during
granulation of very hard or noisy materials. The Occupational Safety and Health Act of 1970 has established guidelines for Permissible Noise Exposures (OSHA 1910.95) that should be followed.
˛ NEVER attempt to operate the granulator unless it is fully assembled with all guards
and interlocks in place and functional.
˛ OBSERVE all danger, warning, caution and safety labels on the equipment.
˛ Upon completion of any machine maintenance, be certain ALL SAFETY GUARDS
AND COVERS are securely and properly fastened prior to resuming machine operation. All fasteners must be in place and properly tightened. ANY
SHORTCUTS MAY RESULT IN INJURY TO PERSONNEL OR DAMAGE TO EQUIPMENT.
˛ NEVER wear any loose fitting clothes, neckties, or dangling items such as earrings,
belts, or shoestrings. Jewelry, such as wristwatches, bracelets, or rings should NEVER be worn. Long hair must be tied back or placed in a tight fitting hairnet. NEVER lean against or rest hands or feet on the granulator when it is in operation or open for maintenance. NEVER stand on the granulator when it is in operation.
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˛ ROTATION OF MOTORS: The correct rotating direction for the granulator motor
is clearly marked on the machine. Always check for proper rotation of motors. Incorrect rotation direction can cause severe damage.
˛ ELECTRICAL GROUNDING: All electrical equipment on the granulator must be
grounded in accordance to all local codes and Article 250 of the National Electric Code.
˛ ALWAYS DISCONNECT AND LOCKOUT the main electrical power to the
granulator before performing any service.
˛ SAFETY INTERLOCKS MUST NOT BE BYPASSED. The mechanical and
electrical safety interlocks ensure the safety of personnel. They should never be tampered with or removed for ANY reason. They should be checked frequently by a qualified mechanic for proper operation.
˛ NEVER modify the machine configuration or any individual component without
written notice from the factory.
For further information on granulator safety, installation, and operation, see the American
National Standard for Plastics MachineryæGranulators, Pelletizers, and Dicers Used for Size Reduction of PlasticsæConstruction, Care, and Use. ANSI B151.11-1982.
We have long recognized the importance of safety and have designed and manufactured our equipment with operator safety as a prime consideration. We expect you, as a user, to abide by the foregoing recommendations in order to make operator safety a reality.
Tangential Feed Granulators Functional Description 10 of 39
2-3 Typical Features and Components
Hopper
The hopper is a hinged, upright, enclosure with sound dampening. It is designed to facilitate feeding of material to the rotary knives and to prevent chips thrown from the cutting chamber from reaching the operator.
Cutting Chamber
The cutting chamber is a rectangular enclosure comprising the main frame, the bed knives, the bed knife shields, a balanced rotor, and a screen.
The main frame of the cutting chamber carries the bed knives and the bed knife shields. Both the bed knives and shield are adjustable, and the bed knives have reversible cutting edges for extended life.
The internal surfaces of the solid steel cutting chamber are machined to an exceptionally smooth finish for ease of clean-out. The scissor-type cutting action of the chevron rotary knives gives optimum cutting efficiency with low power consumption.
The screen is mounted in a swing-down cradle, positioned just below the rotor and acts as a separating barrier to the granulated material, retaining the material in the cutting chamber until the particle size is such that it will pass through the screen holes.
The open-type, high-alloy steel rotor carries the rotary knives. High-strength alloy steel screws are used for attachment of all knives.
Drive System
The drive system consists of a TEFC 1800 RPM motor set on an adjustable sliding base that is mounted at the right side of the granulator. A belt guard shields the motor drive sheave, rotor sheave and belts.
Discharge System
The granulated material that has fallen through the screen is collected in a transition piece located beneath the cutting chamber. The transition piece is connected to a blower, which conveys the granulated material through ducting to the cyclone separator. The cyclone separator allows the granulated material to drop out of the air system into a container.
Base
The base is a floor mounted airveyor type supporting the cutting chamber on its top surface and the airveyor chute from below the top surface.
Tangential Feed Granulators Installation 12 of 39
Chapter 3: Installation
3-1 Uncrating the Equipment
The granulator is securely bolted onto a skid and fully covered with a wooden crate.
Prepare in advance the site you have selected for installation of the granulator. Be certain that the area to be occupied by the machine is clean, level, and free of obstructions. The machine should be set on a concrete floor, and care must be taken when moving the machine across a hollow timber floor, so that the granulator’s weight does not cause damage. The site you have selected must have a floor rating to adequately support the weight of the machine. If necessary, use steel shims to level the machine.
We recommend that the machine be lagged to the floor using the through-holes provided in the base plate. Vibration isolation pads may be mounted between the base plate and the flooring.
Locate the machine so that access is given to electrical components, screen, and hopper. Maintenance personnel should have unobstructed access to the units on which they will be working.
To avoid squeezing people working near a machine, there should be adequate clearance maintained between machines, walls, or partitions. Hinged doors and covers should have full swing. Restrictions may force work in cramped quarters. An off-balance operator with an awkward reach into a partially obscured area is unsafe.
If inspection after shipment has revealed no shipping damage, unpack the unit by removing all hold-downs, tie-downs, bolts, nuts, etc. Remove the envelope with the electrical schematics and instruction manual from the base evacuation area.
You can now have the machine lifted from the skid. To lift and move the granulator safely and correctly, cover any sharp corners or edges, and use the type of equipment that has the most appropriate features and capacity. Use the designated lifting points, and do NOT lift the machine by the hopper handles or guards.
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