Post on 05-Apr-2018
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Principles of MaterialHandling
Planning Principle
Operating Principle
Equipment PrincipleCosting Principle
General Principle
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Planning Principle
1. Plant Layout principle2. Delegation of responsibility principle
Separate Dept.
Operators not for mat. handling
Mat. not lifted manually beyond waist height
Over 20 kgsmechanical system
3. Minimisation of re-handling principle
move to point of use
Proper height
Non mixing of sorting mat.
No twice movement of mat. in same direction.
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4. Space Saving principle - cubic content
Non spreading of mat. on floor
Palletisation and stocking
Congestion retards flow
Space costs moneyuse monorail devices
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Operating Principles
1. Unit load handling principle Bulk/Lots : Pallets, Trolley
Tray, Piling.
2. Gravity principle Roll or slide down
3. Flow of materials principle
Steady flow
Straight Path
Minimum backtracking
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Equipment Principles
1. Mechanisation principle
Reduces handling cost, speed, safety,productivity.
Heavy Materials Continuous labour cost eliminated
All considerations: cost, flexibility, time, volume
2. Terminal time principle Waiting time: pickup and put down time
Palletisation and unit load
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3. Dead Weight principle
Ratio of load handled to dead weight of
equipment.
minimum dead weight
Weight of trays, trolleys and pallets
4. Standardisation principle
Interchangeability
Reduces investment in spares inventory
Reduces maintenance and repairs cost
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5. Maintenance principle
Systematic maintenance
Preventive maintencance
Impact of machine failure
6. Speed principle
Pallets of square in shape: fork entry in any side
Two way traffic route
Gangways clear
Sufficient supply of boxes, pallets, containers toeliminate waiting
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Costing Principles
1. Equipment selection principle Most flexible: min. operating cost
Equipment selection decision
2. Replacement principle Economic retentive period
Repair cost
Breakdown cost
3. Handling cost appraisal principle
Periodic analysis of mat. handling costs
highlights areas of improvement
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General Principles
1. Safety principle
Hot material
Gangways lighted and unobstructed
Operators well trained Aisles wide
Safety regulations
2. Training principles
Basic training to every employee Effect of MH on product cost and quality
At end of operation job positioned such that it is ready tomove.
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3. Identification principle
Labelling on pallets and boxes Bar code system
4. Location principle
MHE placed at right place and right time
5. Material treatment principle
Scarp and end pieces
Low value bulky mat.cost
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Selection of mat. handling equipment
Mat. to be handled
Plant buildings
Layout
Speed requirement
Mat. flow pattern
Method of production
Distance moved
Safety requirement
Installation and operating cost
Flexibility
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Belt Conveyor
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Belt Conveyor
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Roller Conveyor
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Screw Conveyor
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Screw Conveyor
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Monorail conveyor
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Monorail Conveyor
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Vibrating Conveyor
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Oscillating Conveyor
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Hand operated tuck
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Fork Lift Truck
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Tractor Trailer
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Hoist
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Gentry Crane
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Jib Crane
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Ropeways
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Slides and Chutes
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Lifts
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Tractor and Trailer
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Objectives of mat. handling
Speed and economy
Min. cost
Prevention of damages
Safety Min. fatigue and labour
Improvement in productivity
Higher plant efficiency
Greater utilization of MHE
Good Housekeeping
Lower investment in WIP
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Symptoms of Poor MH Production losses due to delays
Long queues Congestion
Material damage
Skilled labour: MH operations
Piling of WIP Over crowded floor areas
Mat. mixups
Frequent breakdown of MHE
Excessive loading and unloading time
Aisles/ passages blocked
Bad housekeeping