Machines and Devices of Logistics - Thematics
Classification of the transported goods and
main classes of materials handling
Forklifts II.
Test 3
Automated guided vehicles
Building and analyzing material
flow in logistic systems
(capacity, stocks, bottlenecks
etc. using Simul8)
Machines for handling bulk materials
Belt conveyors
-----------2------------------Bucket elevators
Screw conveyors
Roller conveyors
-----------3------------------Presentation of the conveyors at the
Practice for the test 1
with presentation in the labor
-----------------9--------------Overhead cranes
Overhead conveyors and monorail systems
-----------------10-----------------Test 2
Capacity analysis of complex materials handling
Test 1
Modeling possibilities of manufacturing logistic
Machines for handling unit loads
Containers for material handling
SysML Modeling language
Types of unit loads inside manufacturing
Simulation software (ált)
Forklifts I.
Definition of materials handling
Organized motion of goods and materials which covers shorter distances and
the state of the transported object doesn’t change.
In a typical factory, MH accounts for 24% of all employees, 55% of the space,
and 87% of the production time.
It accounts for between 15% to 70% of the cost of a product.
Relation of materials handling and logistics
Requirements on
timing and relations
Provision of materials’
transport services
Classification of transported goods
Transported materials
In natural form
In loading units
Bulk materials
Solid bulk materials
Classification of materials-handling machines
Materials-handling machines
Continuous operating materials
handling machines
Discontinuous operating
materials handling machines
Materials-handling machines
Lifting machines
Auxiliary devices
Transporting machines
Loading machines
Classification of materials-handling machines
Materials-handling machines
Chute conveyor
Wheel conveyor
Roller conveyor
Chain conveyor
Slat conveyor
Other equipment
Flat belt conveyor
Magnetic belt conveyor
Troughed belt conveyor
Bucket elevator
Vibrating conveyor
Jib crane
Bridge crane
Gantry crane
Screw conveyor
Pneumatic conveyor
Vertical conveyor
Cart-on-track conveyor
Tow conveyor
Trolley conveyor
Power-and-free conveyor
Sortation conveyor
Stacker crane
Tower crane
Mobile crane
Industrial trucks
Hand truck
Pallet jack
Walkie stacker
Counterbalanced lift truck
Reach stacker
Turret truck
Order picker
Automatic guided vehicle (AGV)
Materials handling related features of solid bulk
Solid bulk materials:
- typically homogeneous materials
- transport and loading in greater masses, without packaging
Materials handling related features of solid bulk materials:
-grain size (average, max, min)
- grain-size distribution
- bulk-density
- friction coefficient on solid surfaces
- moisture content
- cohesion
- friability (fragile)
- flowability
- abrasiveness
- corrosiveness
- temperature
- frozen
- health-threatening
Materials handling related features of solid bulk
Examples :
Ashes: abrasive when dry, corrosive when wet
Charcoal: dusty (explosive dusts)
Cement: entrains air, compacts in storage, must not contact
with moisture
Grass seed: gentle handling
Sulphur: danger from static sparks, risk of ignition, corrosive
when wet
Iron ore: may be in large fragments
Wheat: hygienic conditions
Materials handling related features of solid bulk
Grain-size distribution diagram
Materials handling machines for handling solid
bulk materials
Choice of equipment
1. Type of conveyor or elevator
2. Material transfer
3. Profile
4. Material properties
Effect of the height
difference for the choice
of the equipment
Materials handling machines for handling solid
bulk materials
Belt conveyors
General features
Belt conveyors
Components and construction
Belt conveyors
Typical arrangements
Belt conveyors
Typical arrangements
Belt conveyors
Calculating capacity for a belt conveyor
Capacity reduction coeff.
Inclination coeff.
Loading coeff.
Belt conveyors
Driving of a belt conveyor
Max. circumferential force
at the drum
Required tensioning force
Max. belt force
Possibilities of increasing arc of contact
Belt conveyors
Comparison of tensioning force
Head side driven
Tail side driven
Belt conveyors
Dual-drum driving system
Dual-drum driving system
Ratio of the required torques at the
two drums:
Belt conveyors
Calculation of the required force
Length-dependant resistance
Length depending drum resistance factor
Deflector plank resistance
Belt cleaner resistance
2-5 N/cm
Material acceleration (feeding) resistance
Resistance of a discharge trolley
Lifting resistance
Resistance of forward tilted idlers
Number of forward tilted idlers
Belt conveyors
Belt feeding
Speed vector of the material loaded onto the conveyor  conveyor speed
feeding belt
Tips for feeding:
Belt conveyors
Belt feeding
Belt conveyors
Discharge from the belt
Discharge over the
head pulley
Discharge from fixed
Discharge from
moveable tippers
Discharge by
Tube belt conveyors
Typical curve radius for normal belt conveyor
Typical curve radius for tube conveyor