Griffith the operation of wrapping. The major components

Griffith
School of Engineering

Griffith
University

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7001ENG – Research Methods for Engineers

 

End of Trimester Report

 

Automatic
Wrapping Machine

Student Name- Gandhi
Aakash Amitkumar
Student Number- s5110258
Major- Mechanical Engineering

 

 

 

 

 

 

 

 Gold
Coast,

Date- 23/01/2018

 

Declaration

 

I declare that this research proposal contains
no material which has been submitted for assessment in any other subject at Griffith
University. To the best of my/our knowledge and belief, this research proposal
contains no material that has been previously published by any other person,
except where due acknowledgement has been made.

 

Student
ID

Family
Name

Other
Names

Signature

S5110258

Gandhi Aakash

A.A.Gandhi

 

NOTE: Only students who
sign the declaration page will be awarded marks for this proposal.

 

 

1)   
PROJECT
Summary

This
invention belongs to the field of mechanical engineering and related to design
& development of an automatic wrapping machine, and more particularly to
the packaging or wrapping machines used in different industries. Wrapping is
the process of covering or protecting products, boxes, cartoons etc. It is done
to protect the objects inside the box damaging from dust, humidity and harsh
environment. Packaging can be of various types based on the product being
wrapped. For example medical device packaging, bulk chemical packaging, drug packaging, retail food packaging, military material
wrapping, pharmaceutical packaging and many more.

The project comprises of the design and development of an automatic wrapping
machine. It is constructed in order to wrap all sizes and types of boxes. The
image below shows design of an Automatic
Wrapping Machine. The model designed is suitable for wrapping universal
sizes of boxes. It has a rotating turntable, run by a motor, fixed on a steel
base which is movable with the help of wheels.

Fig 1: Automatic Wrapping Machine

A lead
screw along with its structure is mounted on a similar steel base which
contains supports for the structure as shown in the figure. Plastic roller is
mounted on a stand for straight position while wrapping. Roller assembly
reciprocates on the lead screw by means of a motor. It contains two limit
switch where one switch changes the direction of rotation of lead screw and the
other limit switch stops the cycle. The control unit is mounted on a base
behind the screw to control the operation of wrapping.

 

 

 

The
major components shown in the figure are:

 

1.        
Rotating
turntable

2.        
Turntable
base

3.        
Lead
screw structure

4.        
Lead
screw base

5.        
Limit
switches

6.        
Control
Unit

7.        
Plastic
Roller and plate

2)    KEYWORDS

AC Drives, Limit Switches, Packing Mechanism, Lead
Screw

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3) METHODOLOGY

3.1       DETAILED
DESCRIPTION OF THE INVENTION

 

The
design and working of an Automatic
Wrapping Machine is made flexible for easy loading and unloading of
different sizes of boxes. The machine contains two main sections. One section
i.e. wrapping mechanism contains the turntable and its base where boxes are
placed to be wrapped. The other section also called as controlling mechanism
contains the plastic roller, attached to the lead screw, which is used for wrapping
boxes. The plastic roller is fixed on a vertical stand mounted on a plate with
the help of screws. Together they constitute the roller assembly.

 

The lead
screw is mounted on a moving base with the help of supports. In the first
section a motor is fixed under the turntable base to provide rotation to the
turntable. A similar motor with more speed is mounted under the lead screw base
to provide reciprocating motion to the roller assembly. A control unit is fixed
behind the lead screw structure to control the operation of wrapping. It
contains switches and regulators to control the speed of the motor and
operation of the machine. The upper limit switch is kept fixed at a height
equal to the height of the box and the lower switch is fixed with the roller
assembly such that it touches the base when moving downwards.

     Fig 2: Automatic Wrapping Machine

Before
the start of operation the plastic is placed under the box so that the bottom
area is wrapped first. As the motion start the roller assembly moves upward and
the wrapping of the box begins. The upward motion of roller and the rotation of
the turntable start together. Just when the roller reaches the height of the
box it touches the limit switch and the direction of lead screw changes from
clockwise to anti-clockwise. Because of the direction change, the roller
assembly moves downwards and the plastic overlaps on the box. The downward
motion of the roller assembly stops when the lower limit switch touches the
base, as the motor stops to rotate. Hence, the operation of wrapping ends. The
plastic film is then cut manually from the roller end.

 

Fig
3: Operation of AWM

 

The figure shows the
wrapping process of a box placed on a rotating base. At first, the upper limit
switch is set at a height equal to the height of box. Then the plastic film from
the roller is stretched and placed under the box such that the stretched film
covers the lower most surface of the box. After that, the wrapping process
starts by pressing the start button on the control unit. The speed of both the
motors can be controlled by regulators on the control unit. The process
completes when the roller and the lower limit switch comes back to its original
position. A stop button is provided on the control unit to stop the operation
in between in case of emergency.