OUR PROJECT

2. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
ACKNOWLEDGEMENT
I am very glad to represent project report on "PAPER CUTTING AND
REWINDING MACHINE" fully designed, fabricated and tested in our polytechnic
as part of our curriculum is awarding the Diploma in Engineering. I have tried my
level best to focus upon each and every parameter. In concern with this topic the
detail, necessary figure, definition, tabular analysis has been enumerated in very
easy, simple, compact and lucid manner.
I have been able to achieve this task by the dynamic guidance of
honorable SIVARAMAN sir; I have no wards to express my gratitude
towards his kind, persistent inspiration, parent advice and outstanding treatment
while clarifying my confusion.
I also extend my sincere thanks to our esteemed Head of Mechanical
Engineering Department Mr. M.R JAYACHANDRAN, whose guidance and
constant inspiration where a great use in working of this project. We are also
grateful to our tutor MR. P.P. DEVADAS.
I am also grateful to our honorable work shop superintendent
Mr.N.M.SATHEESAN and members of staff of our workshop for providing
numerous facilities and guidance due to which this difficult task turned in a
convenient task.
The permission granted to us by the honorable principal
Mr.V.V.SADASIVAN, to do the project work in greatly acknowledged.
Last but not least, I am very thankful to my project partners without whose
kind cooperation it was difficult and impossible to go through the leaps and
bounds while preparing this project. Also thanks to them who directly or indirectly
co-operated and contributed during work.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

3. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
ABSTRACT
Paper Cutting & Rewinding Machine is one of the simplest machine which cuts
rolled paper in needed amount and re-winded form. The conventional paper rewinding
machine has complex mechanism and bulk size. We made some modification to the
conventional machine and eliminating its defects. The main peculiarity of machine is its
simplicity, reduced size, weight. And also reduces floor space. This project can be
directly implemented to paper cutting and rewinding machines in Paper mills. This
machine can also use in textile mills, plastic and rubber sheets cutting and rewinding
process in various industries by changing its cutting components.
By applying these modifications to the conventional machine reduce
maintenance and servicing cost, floor area and overhead expenditures. It is well suited
for small scale industries.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

4. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
CONTENTS
TOPIC NO. TOPIC NAME PAGE-NO.
1. COMPONENTS OF MACHINE 4
2. MANUFACTURING PROCESS 8
3. STRUCTURE FABRICATION PROCESS 8
4. ROLLER MACHING PROCESS 10
5. CUTTER CLAMP MAKING PROCESS 12
6. DRIVING MECHANISM 13
7. WORKING OF MACHINE 14
8. ADVANTAGES 15
9. SPECIFICATIONS OF MACHINE 15
10. MATERIAL REQUIREMENT & COST 16
11. BIBLIOGRAPHY 17
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

5. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
 COMPONENTS OF PAPER CUTTING & REWINDING
MACHINE
The main components of Paper Cutting & Rewinding Machine are listed
below.
1) BASIC FRAME
The entire unit is mounted on a rigid frame. The frame is made of
mild steel C- Channels (75X40 mm) connected in rectangular form and weld
at their joints.
2) ROLLERS
The paper rotating element in this device is the ϕ 89 mm outer
diameter rollers with ϕ 40 mm outer diameter journals, which made up of
three components.
1) G. I Hollow Pipe of ϕ 89 mm outer Diameter.
2) M.S Rod of ϕ 40 mm Diameter.
3) M.S Circular Plate of ϕ 81 mm Diameter.
The rotation of motor is transferred to the one of the four rollers on which
cut paper is mounting in operation. The rotating roll makes all other three rollers
to rotate. The roller is supported at its two ends by Plummer block with ball
bearing blocks. The main functions of roller are to favor the cutting operation by
moving paper and rewind it to rolls.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

6. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
4) PLUMMER BLOCK
The roller is supported at the two
ends with the help of Plummer block fitted
with ϕ 40 mm diameter Ball bearings. The
bearings are cleaned and greased for easy
rotation of roller.
5) BEARINGS
Ball bearing is a type of rolling-element bearing that uses balls to
maintain the separation between the bearing races.
The purpose of a ball bearing is to
reduce rotational friction and support radial
and axial loads. It achieves this by using at
least two races to contain the balls and
transmit the loads through the balls.
In most applications, one race is
stationary in Plummer block and the other is
attached to rollers journal. As one of the
bearing races rotates it causes the balls to
rotate as well. Because the balls are rolling
they have a much lower coefficient of friction than if two flat surfaces were
sliding against each other.
Ball bearings tend to have lower load capacity for their size than other
kinds of rolling-element bearings due to the smaller contact area between the
balls and races. However, they can tolerate some misalignment of the inner and
outer races.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

7. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
6) INDUCTION MOTOR
An induction or asynchronous
motor is an AC motor in which all
electromagnetic energy is transferred by
inductive coupling from a primary winding
to a secondary winding, the two windings
being separated by an air gap.
The machine is powered by 1 Hp motor with 1440 rpm. This makes
one roll rotates and rotating roll makes other rollers to rotate and not only
wound the paper but also pull the paper to make the operation going.
7) SINGLE V-BELT AND PULLEY SYSTEM
Vee belts (also known as V-belt or wedge rope) solved the slippage
and alignment problem. It is now the basic belt for power transmission. They
provide the best combination of traction, speed of movement, load of the
bearings, and long service life. They are generally endless, and their general
cross-section shape is trapezoidal (hence the name "V").
The "V" shape of the belt tracks in a mating groove in the pulley (or
sheave), with the result that the belt cannot slip off. The belt also tends to
wedge into the groove as the load increases-the greater the load, the greater
the wedging action, V-belts may be homogeneously rubber or polymer.
Belts are looped over pulleys. The belt drives the pulleys in the same
direction. As a source of motion, the belt is one application where the belt is
adapted to continuously carry a load between the motor and pulley fitted on
the roller.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

8. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
8) CUTTER CLAMP (C-CLAMP) WITH BOLTS
c-clamp with the two bolts are used to clamp the cutter to the frame
and one extended piece of flat for mounting of cutter.
9) NUT AND BOLTS
Bolt, is a type of fastener characterized by a helical ridge,
known as an external thread or just thread, wrapped around a cylinder.
A nut is a type of fastener with a threaded hole. Nuts are almost always
used opposite a mating bolt to fasten a stack of parts together. They are
made up of Mild Steel. Nuts and Bolts of different size is used for fixing
the Plummer block to the main frame and to install the cutter clamp.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

9. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
MANUFACTURING PROCESS
I. STRUCTURE FABRICATING PROCESS :-
For structure fabrication, the c-channel of size 75 X 40 mm is used. The
approximate wt. of it per meter is 6.8 kg. Steps in fabrication of structure are given
below.
 Step One:
First cut the c-channel in pieces of length 71" (i.e. 6 feet [180 mm]- two pieces)
and in 36" (i.e. 3 feet[91.5 mm] - three pieces). Then Put the two lengths of 6 feet
parallel to each other at a distance of 3 feet from each other. Then put the lengths of 3
feet on either end of two parallel lengths and weld them as shown below. The two
diagonals must be same.
 Step Two:
Then cut four pieces of c-channel of length 24" (i.e. 2 feet[61 mm]) and weld
two of them on one end of rectangular structure vertically using engineers block. Then
weld remaining two pieces vertically at a distance of 30" from previous pieces.
 Step Three:
Then brought the two pieces of flat of size 75 X 12 X 760 mm and weld them on
the top of four columns as shown.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

10. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
 Step Four:
Then cut another two pieces of
length 48" (i.e. 4 feet[122 mm]) and
weld them vertically at a distance of
16" from previously welded columns.
Afterwards weld the previously cut
piece of 36"[41 mm] on top and in
between the upper ends of these
columns.
 Step Five:
Then cut two pieces of C-channel of length 15". And four pieces of 4" length.
Then at a distance of 4.5" from nearest end weld them to form a frame as shown below.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

11. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
II. ROLLER MACHINING PROCESS
Roll is mead up of hollow pipe, solid circular plates & solid shaft journal.
So we have to manufacture each part as per required size and then assemble it as
a roll. Steps in this task are:-
 Step one:
First, brought the hollow pipe of required dimensions. I.e. of required outer,
inner and length. If it not available, then cut it on hacksaw machine.
 Step two:
Then brought two circular plates of 10 mm thickness, face them from both
sides by holding them on lathe machine. And turn out to the diameter as equal to
inner diameter of hollow pipe so they can fit into pipe for welding purpose.
 Step three:
Take solid bar of M.S. of 50 mm diameter cut it to length 110 mm. Hold
this bar on lathe chuck and turn it out up to the diameter 38 mm so that it can be fit
in pedestal self-aligning bearing block.
 Step four:
Now, weld the turned solid bar to each of two s o l i d circular plates axially.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

12. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
GROOVE FOR WELDING THE M.S ROD AT CENTRE-
 Step five:
Now, weld these plates in the bore of hollow pipe.
 Step six:
The roll is completed, but because of welding different parts it
need to be turned again using lathe machine. Hold the journal on one
side in chuck and turn the other journal as well as hollow pipe part of
roll. Do the same operation by holding
other journal in chuck so the roll will
rotate along its axis accurately.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

13. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
III. CUTTER CLAMP MAKING PROCESS
The c-clamp with the two bolts to clamp and one extended piece of flat for
mounting of cutter is welded. It is used to hold the cutter.
 Step One:
First take the flat of 25 X 10 and cut it by bend saw in size of 90 mm,
65mm, 60 mm and 40 mm.
 Step Two:
Weld the pieces of 90, 65, and 60 mm to form C. Then take the piece of 40 mm
in length and weld it on the 65 mm side of clamp.
 Step Three:
By using drilling machine, make three holes of 10 mm at the points shown below in
the complete assembly of cutter. Afterwards perform the tapping operations using
tap of ½ inch.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

14. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
IV. DRIVING MECHANISM
As our project as a demo and also designed for small weight
we use the 1 Hp A.C. motor. It is having the 1440 rpm speed. We use
two pulleys of three [7.62 mm] & eight [20.32] inch diameter
respectively on motor and roller. One on the motor shaft and another
is on the shaft of roll. The numbers of belts required for given
application is one. V-belt is used for
this purpose.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

15. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
V. WORKING OF MACHINE
As we give number of modifications it is necessary to briefly
explain working procedure of machine. When the paper being
manufactured in paper mill it is not of standard size an also get torn out at
the edges. And here is the need of re-winding machine. The roll of paper
manufactured is mounted on the roll (A). In our machine we have given the
self-aligning bearing with inner extended ring for ease in mounting and urn-
mounting.
Then paper is passed around roll (B) to ensure that paper remain
straight and tight. Then it passed through the cutter and grooved roll on top
of machine, where it is cut. Because of our modification to this cutter roll the
wt. of machine is decreased.
Then the paper which is cut is come to the roll at bottom, The roll is
powered by 1 Hp motor with 1440 rpm. This rotating roll makes other roll
(C) to rotate and not only wound the paper but also pull the paper to make the
operation going.
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

16. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
 Advantages
1) It is more compact as compared with conventional one.
2) Operation is simple Because of eliminating complex mechanisms.
3) Saving of floor space as motor is adjusted inside the structure.
4) New cutter clamping assembly given will eliminate the biggest
disadvantage of machine i.e. high weight.
 SPECIFICATIONS OF MACHINE
6 feet ( 152.4")
Length
= 387.096 mm
Width 0.914 feet ( 36") = 91.44 mm
Height 4 feet ( 48" ) = 121.92 mm
4 Hollow rolls, 8 Plummer
Components
blocks,8 bearings
1 Hp, 3 phase, induction
Motor
motor
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

17. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
 MATERIAL REQUIREMENTS & COST
SL
DESCRIPTION QTY. RATE AMOUNT
No.
760 X ϕ 89 mm G.I
1 25 Kg. Rs. 81 per Kg. Rs. 2025.00
Pipe(4 No’s )
M.S. Rod
2 135 mm X ϕ 50 mm 24 Kg. Rs. 58 per Kg. Rs. 1392.00
M.S Circular Plate
3 12mm X ϕ 90 mm 7 Kg. Rs.58 per Kg. Rs. 406.00
(8 No.)
M. S. Flat 12 X 75 X
4 760 11 Kg. Rs. 58per kg. Rs. 638.00
(2 No
C-channel
5 76 Kg. Rs. 58 per kg. Rs.4400.00
75 X 40 ( 12.2 meter )
Plummer Blocks
6 8 No. Rs.200 per block Rs.1600.00
No 208 i.e. ϕ 40 mm
Bearings ϕ 40 mm 8 No. Rs.30 per Bearing Rs. 240.00
7
Inner
Pulleys 3" 1 No. Rs. 240 per Pulley Rs. 150.00
8
Pulley 8" 1 No. Rs. 540 per Pulley Rs. 540.00
9 V- Belt of B-type 1 No. Rs.180 per Belt Rs.180.00
10 Paper 4.1 kg Rs. 35 per kg. Rs.131.00
Motor 1 Hp Induction
11 1 No. Rs. 2500 Rs. 2500
Motor (2nd Hand)
12 Travelling Charge --- ------ Rs.1,160.00
Total Rs.14,962.00
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar

18. PAPER CUTTING & REWINDING MACHINE Project Report 2012-13
BIBLIOGRAPHY
 Forbes Marshall- Engineering Data Book
 Workshop Technology- B.S. Raghuwanshi (Vol. I & II)
 Production Management- ICFAI University
 Elements of machine design- V. B. Bhandari
 Strength of materials- R. K. Bansal
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Department of Mechanical Engg. S.R.G.P.T.C Triprayar