Material Handling

1. 4/2/2018 1
D.P.Bhaskar, Sanjivani COE Kopargaon
Give FEEDBACK: dpbhaskar@rediffmail.com
Design of Material Handling System

2. • Movement/Storage/Control/Protection of
• Materials/Goods/Products
• Throughout the process
• of
• Manufacturing/Distribution/
Consumption/Disposal.
Material Handling Equipment
D.P.Bhaskar, Sanjivani COE Kopargaon

3. Classification of MH equipments
Conventional
Hoisting
Conveying
Surface
&
Overhead
Computer aided
Robots
AGVs
1
2
3
1
2

4. Hoisting equipments
Crane
Pulley Blocks
Elevators
Lifting or Lowering of Unit Load
and Convey Horizontally
Portal Jib Crane
Electronic chain Hoist

5. Conveying
Belt
Chain
Screw
Continuous flow of bulk/ unit load

6. Objective of MH system
D.P.Bhaskar, Sanjivani COE Kopargaon

7. Guidelines for selection of MH system

8. Loads can be counted by numbers or units.
Types of Loads
Unit Load
e.g. Component of machine, complete machine, Cement bag, building block
Loads can not be counted by numbers or units.
It is in the form of particles or lumps of
homogeneous materials or powder
Bulk Load
e.g. Sand, Cement, Coal, Mineral, Stone, Clay
Containerization
Converting bulk load to unit load
e.g. Cement to Cement bag
Bearings in Box
D.P.Bhaskar, Sanjivani COE Kopargaon

9. To transport product in a straight line, horizontal or
inclined paths from one spot of operation to another
Belt Conveyor
Items with irregular surfaces and for small items
D.P.Bhaskar, Sanjivani COE Kopargaon

10. Belt
Conveyor

11. Loading methods
Hopper based Travelling Hopper
D.P.Bhaskar, Sanjivani COE Kopargaon

12. Discharge Methods
Both end Discharge
Plow Discharge

13. Belt-Take up arrangement
To maintain adequate tension in belt
Screw Take up arrangement
Tension Take up pulley arrangement(Gravity)

14. Conveyor belt (Impact, Abrasion)
Under layer: Carcass
• To Provide Linear Strength
• To retains shape
Over layer: Cover(Rubber)
D.P.Bhaskar, Sanjivani COE Kopargaon

15. Drive & Tail pulleys
lp=B+2s
s=(60-75 mm)
B= Belt width
D ≥ K1K2Zp
K1= Material Factor for plies
K2= Belt Tension and arc of contact factor

16. ∑F=Vector sum of Tight and Slack side tensions

17. Idlers and Types
Spring Type
Trough Type
Flat
Support to Belt

18. Classification of belt conveyors
Flat belt conveyor Trough belt conveyor
D.P.Bhaskar, Sanjivani COE Kopargaon

19. Flat belt conveyor: TERMINLOGY
The angle of repose ψ :
Angle of a freely formed surface with horizontal (STATIC)
The angle of Surcharge [φ] :
Angle of a freely formed surface with horizontal when in motion and vibrating
(DYNAMIC)
φ less than by ψ 50-200

20. Troughed Belt Conveyor
[03 Idlers]
D.P.Bhaskar, Sanjivani COE Kopargaon

21. Troughed Belt

22. Belt Capacity[Q]
The load that a belt conveyor is able
to carry, depending upon the area of
cross section of load on belt and the
speed of the belt.

23. Trough Angle, Repose angle and C

24. Inclined belt conveyor
Belt Capacity[Q]
D.P.Bhaskar, Sanjivani COE Kopargaon

25. Material Characteristics
Flowability
Determines the cross-section of the material load on the belt.
It depends on
• Angle of repose and
• Angle of surcharge together with
• Size and shape of the material particles,
• Roughness or smoothness of the surface of the particles,
• Moisture content.
D.P.Bhaskar, Sanjivani COE Kopargaon

26. Depends Upon
1) Nature of material
2) Belt Width
Conveyor Belt Speed (V)
Standard Belt Widths: (B) mm
400, 450,500, 600, 650, 750, 800, 900, 1000,
1200, 1400, 1600, 1800, 2000, 2200, 2400

27. Problems 1
Problems 2

28. Problems 3
D.P.Bhaskar, Sanjivani COE Kopargaon

30. POWER to drive system
Resisting Forces

31. Resisting Forces (F) Resisting to movement of belt(speed)
D.P.Bhaskar, Sanjivani COE Kopargaon

32. 1.Load resistance due to lifting of load (Fm)
D.P.Bhaskar, Sanjivani COE Kopargaon

33. 1.Load resistance due to lifting of load (Fm)
D.P.Bhaskar, Sanjivani COE Kopargaon

34. 2.Frictional resistance due to Carrying Run[Fcr]

35. 3.Frictional resistance due to Return Run Idler(Frr)

36. 4. Frictional Resistance at Pulley (FP)

37. 4.Resistance due to loading station FL
D.P.Bhaskar, Sanjivani COE Kopargaon

38. 5.Frictional Resistance at unloading station FU
D.P.Bhaskar, Sanjivani COE Kopargaon

39. 6.Frictional Resistance at cleaning station ( FCL)
D.P.Bhaskar, Sanjivani COE Kopargaon

40. Frictional Resistances( F)

41. NUMERICAL

42. D.P.Bhaskar, Sanjivani COE Kopargaon

43. Slack side to Tight side
D.P.Bhaskar, Sanjivani COE Kopargaon

44. D.P.Bhaskar, Sanjivani COE Kopargaon

47. D.P.Bhaskar, Sanjivani COE Kopargaon