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  • Published on: 7th September 2019
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Submitted By

KA.PATEL JAY (130240119035)

MESARIYA KULDIP (130240119056)

NANDY KRUNAL (130240119063)

SAIYED SHAHBAZ (130240119591)

Guided by


In fulfillment for the award of the degree




Department of Mechanical engineering

Hasmukh Goswami College of Engineering

Gujarat Technological University, Ahmedabad.

October 2016


Mechanical Engineering




This is certify that project work entitled“FOOT OPERATED AIR PRESSURE PAINTING SPRAY MACHINE” has been carried out by KA.PATEL JAY(130240119035), MESARIYA KULDIP (130240119056), NANDY KRUNAL (130240119063), SAIYED SHAHBAZ  (130240119591) under my guidance in fulfillment of the degree of Bachelor of Engineering in Mechanical Engineering (7th Semester) of Gujarat Technological University, Ahmadabad during the academic year 2016.

Internal Guide:Pro.Kartikpatel Head of Depart: Prof.AmitMonpurwala

Asst. Professor, ME Dept. Head, ME Dept.

HGCE, Vahelal HGCE, Vahelal

Sign of External Examiner:


               We acknowledge with sincere thanks to our project in charge Prof.kartik Patel for excellent guidance and entirely selfless efforts. Without their co-operative attitude, constant inspiration, and dedicated at each and every stage of this project, it would not possible to make this project complete. We are highly thankful to our project guide for their encouragement. We would also like to express our gratitude and thanks towards the staff and Head of the Department (H.O.D.) of Mechanical Engineering Department for their continuous support.

              We choose the topic “FOOT OPERATED AIR PRESSURE PAINTING SPRAY MACHINE” as a project. We had also visited the internet sites to find the details & collated information about it. Even though, having information & details it was very hard to convert it in to real application by us.

             We also wish to express our heartfelt appreciation to my friends, colleagues and many who have rendered their support during project work, both explicitly and implicitly.


Certificate 2


Abstract 6

1.Introduction 7


  1.1What area unit the painting machine 7

  1.2A way to use the painting machine 8

  1.3 Practical First 8

  1.3.1choosing the simplest pressure setting. 8

  1.3.2 Triggering the applicator 10

  1.4 wherever is painting machine to be used 11

  1.5 four major spray system 11

  1.6 Advantages 11

  1.7 Disadvantages 11

  1.8 Application 12

2. Literature Review 13

3.Objective of work 15


  4.1 air tank 16

  4.2 spray gun 17

  4.2.1 discription of applicator 18

  4.2.2 trigger 18

  4.2.3 description for paint instrument cup 19

  4.3 non – return valve 20

  4.4 foot operated vaccume pump 21

5. Design and calculation Painting spray machine 23

6. Conclution 27

7. Future scope 28

Refrence 29

Canvas 30


Product development canvas 31

Ideation canvas 31


Figure No. Title Page No

Fig.1.1 Spray feed rate 9

Fig.1.2 Steps of spray movement 10

Fig.1.3 Overlapping 10

Fig.4.1 Air tank 17

Fig.4.2 Spray gun 17

Fig.4.3 Paint container 20

Fig.4.4 Non return valve 20

Fig.4.5 Foot operated vacuum pump 21

Fig.5.1 Tank pressure gauge 24

Fig.5.2 Air storage tank 24

Fig.5.3 Non return valve 25

Fig.5.4 Spray gun 25


 Our main aim is operate the spray painting machine without electricity. We hope this concept is very useful where electricity is not available. Here in manually operated spray painting machine compressor is not used so cost is reduced.    

             Air is contains compressed by air filling pump which is foot operated and by means of that air has been stored in the air storage tank. A Spray painting machine which we made is manually operated and doesn’t consume electricity. The paint container contains paint material. The spray gun spray on the metal substances with good painted surface finish. Thenon-return valve prevents the air return to the duct and without electricity paints can be done on the metal bodies.




Spray painting may be a painting technique wherever a tool sprays a coating (paint, ink, varnish, etc.) through the air onto a surface. The foremost common sorts use propellant typically air to atomize and direct the paint particles. Spray guns evolved from airbrushes, and also the 2 area unit typically distinguished by their size and also the size of the spray pattern they manufacture.

Airbrushes area unit hand-held and used rather than a brush for elaborated work resembling exposure retouching, painting nails or creation. Air gun spraying uses instrumentality that\'s usually larger. It’s usually used for covering massive surfaces with a fair coating of liquid. Spray guns are often either machine-controlled or hand-held and have interchangeable heads to permit for various spray patterns. Single colour aerosol paint cans area unit moveable and straightforward to store.

Air is contains compressed by air filling pump that is foot operated and by means that of that air has been hold on within the air tank. The paint instrumentation contains paint material. The applicator spray on the metal substances with smart painted surface end. a twig painting machine that we tend to created is operated by hand and doesn’t consume electricity. The non come valve prevents the air come to the duct and while not electricity paints are often done on the metal bodies.

The high rate of the air atomizes the paint into terribly small droplets because it blows past a really fine paint-metering part. The paint is carried onto paper or different surface. The operator managements the quantity of paint employing a variable trigger that opens a lot of or less a really fine tapered needle that\'s the control part of the paint-metering part

1.1 What area unit the painting machine?

The painting machine is that device which might be use for paint the objects and different equipment’s by spraying system. This kind of painting machine simple spray compare at hand paint technique.

1.2 A way to use the painting machine?

Before you start spraying, browse the operative manual and review all safety precautions for your paint sprayer. Make sure to properly prepare the surfaces and shield something you don’t need to spray.

Here area unit some spray techniques and tips that could get you started.

1.3 Practical First

If you\'re unaccustomed employing a paint sprayer, observe 1st by spraying water before you paint. It usually takes some observe time to become snug with the spray techniques that manufacture the very best quality end. With a bit observe you will find your sprayer easy-to-use and you will be spraying sort of a professional in no time

• Using water, select a observe space resembling a garage door or different massive flat surface.

• Follow the beginning up procedures victimization water in your sprayers manual.

• Once the unit is set with water to the gun, interact trigger safety and install spray tip and tip guard. See your user manual for details.

1.3.1 Choosing the simplest pressure setting.

Set the spraying pressure victimization the pressure management knob to realize a smart quality full spray pattern. (See a decent spray pattern example to the right).Notice that there aren\'t any runs within the pattern and also the pattern itself is swish. Before painting on the particular surface, use some scraps of cardboard or different space to check the standard of the spray pattern.

• Start with a unaggressive setting and take a take a look at pattern - trigger the gun quickly and if the spray pattern is full, you\'re prepared.

• In most cases the spray pattern won\'t be full on the primary attempt - to Illustrate a spot exists at every finish of the pattern or the sides seem heavier than the centre space of the spray pattern (see example of poor spray patterns ).

If the spray pattern isn\'t full and solid you\'ll ought to increase the pressure setting slightly and take a look at once more. Continue this method of skyrocketing the pressure setting till the specified pattern is achieved.

Fig.1.1 Spray feed rate

• Keep your distance consistent - begin by obtaining snug moving the applicator and learning to take care of the suggested distance from the surface. Ideally the gun (spray tip) ought to be pointed at the surface to be sprayed - sq. to the wall (perpendicular) - and control some twelve inches from the surface. Move your arm whereas keeping the gun pointed straight at the surface being painted. Fanning the gun to direct the spray at an angle will cause an uneven end.

• A smart exercise to urge the texture for the right gun movement is to carry the applicator with the tip guard regarding two far from the wall and move the gun back and forth (horizontally) on the wall whereas maintaining a two inch distance (do not truly spray, solely specialize in gun positioning – note however at the start and finish of every stroke you want to bend your articulationplane slightly to make sure you retain the tip at identical distance). Once you\'re snug at an in depth distance, pull back to twelve inches away and observe a number of a lot of times, bear in mind to look at the position at the start and finish of your reach (if you do not maintain identical distance and flare at the start or finish - common for 1st timers – you\'ll notice the spray pattern starts wide, narrows and so ends wide).

• Work at intervals your reach - once you do spray, you must solely work at intervals the world you\'ll be able to simply reach to take care of the right applicator position

1.3.2 Triggering the applicator-

Next is learning a way to trigger the applicator. you usually need to possess the gun moving before you pull the trigger (starting the spray) and continue your stroke when you unleash the trigger. Triggering the applicator when starting every stroke and emotional before ending the stroke can avoid excessive material in one space

Fig.1.2 Steps of spray movement

Fig.1.3 Overlapping

Overlapping- to make sure a fair quantity of paint on the surface, when finishing the primary stroke, aim the applicator so the tip points at the sting of the previous stroke, overlapping every stroke by 0.5. Once spraying on broad, open surfaces resembling ceilings and vacant walls, the surface edges ought to be sprayed 1st. Then the centre space are often sprayed a lot of quickly.

Spraying within Corners - Aim the applicator and tip directly into the corner covering every of the adjacent walls equally.

1.4 wherever is painting machine to be used?

Spray painting strategies area unit used nearly all over paint is applied such as:

• Interior and exteriors of residential, commercial, industrial, and farm buildings.

• Bridges and different steel structures.

• Refinishing comes.

• Manufacturing.

Spray painting is especially economical for rough and irregular substrates resembling steel, metal decking, and concrete product.


• Airless

• Conventional

• Electrostatic

• High volume low pressure(HVLP)

• Low volume low pressure(LVLP)


• Reduces overspray

• Increases transfer efficiency

• Reduces paint west

• Lowers booth cleanup costs

• Reduces filter replacement costs

• Sprays well into recesses and cavities

• Has moderate capital cost

• Low operating costs


• Has atomization that may not be sufficient for fine finishes

• May not be able to operate with high production rates

• Airless spray is limited to painting large areas and requires a different nozzle on the spray gun to change spray patterns.


• Industrialapplications, the paint is typically contained in a pressure vessel and fed to the spray gun using compressed air.

• spray systems are easy to operate and have low equipment costs, they have a certain amount of overspray and rebound from the sprayed surface



Francis Davis Millet.[1] is mostly attributable with the invention of painting. In 1892, operating beneath very tight deadlines to complete construction of the World\'s navigator Exposition, Daniel Daniel Hudson Burnham appointed Millet to exchange the fair\'s official director of colour, William Pertain. Pertain had resigned following a dispute with Daniel Hudson Burnham. When experimenting, Millet settled on a combination of oil and pigment that would be applied employing a hose and special nozzle, which might take significantly less time than ancient brush painting.

Suh et al. and Arikan.[2], wherever mathematical relationships between the painting thickness and different painting method parameters were analyzed. CAD model primarily based 3D surface painting downside was wide investigated. Sheng et al. 1st introduced the pre-partition of the surface model consistent with native curvatures, and determined the painting parameters consistent with the thickness constrains.

Chen et al.[3] any analyzed the mathematical relationship between the mechanical phenomenon model of the gun and also the painting profile model, and determined the choice of painting parameters to realize an optimized thickness. The similar goal was achieved by Prasad et al. through a “seeded curve” choice, and so repetitively optimizing the painting gun speed and index breadth. Examination with the machine-controlled painting supported CAD model, analysis that\'s adaptive to unknown surfaces is kind of less.

Anand et al.[4] developed AN on-line robotic painting system victimization machine vision. However, the power of the system is extremely restricted because it might solely acknowledge 2nd objects and perform path coming up with. optical maser vary scanner was applied within the work of Picher et al. to discover the options of the target surface and match with the models within the pre-established library, however this technique is fallible considering the dimensional variability of the merchandise, the orientation deviations throughout the scanning and also the limitation of the model storage within the library.

Swager Carl J.[5] developed A mobile spray painting machine having a vehicle movable along a raised shoulder, such as a curb, a carriage located laterally outboard of and movable vertically relative to the vehicle, a roller or the like on the carriage which rides along the top face of the shoulder to maintain the carriage at a fixed elevation relative to the shoulder, and paint spray heads on the carriage which receive paint under pressure from a supply on the vehicle and are oriented to spray paint the top and side shoulder faces as the vehicle moves along the shoulder.

David H.Opie.[6]A manually operated paint striper including an elongated frame mounted on wheels, an elongated container of compressed nitrogen mounted on the frame, an elongated container for striping paint mounted on the frame in an upwardly inclined attitude, conduits effecting communication between the nitrogen container and the paint container for providing a zone of compressed nitrogen in the upper portion of the paint container, a spray gun mounted on the lower portion of the frame, a conduit for effecting communication between the lower portion of the paint container and the spray gun, mounting structure for permitting removal of the spray gun from the frame to effect spraying in an area remote from the striper, and suitable controls for selectively actuating the spray gun from a remote position on the frame.



Whenever people are use the brush and roller for a painting on surface, wall etc. so, they are not satisfied for using brush and roll but we are invented this device , when foot operated air pressure painting spray machine show to easily operating and easily transporting to one place to another place for moving by wheel plate

• Air storage tank:-

A device to storage in tank limited air

• Non-return valve :-

Non-return valve area unit employed in all applications wherever a liquid must be prevented from flowing backwards.

• Spray gun :-

The applicator crystal rectifier to the event of the spray gun an identical device, that usually delivers a better volume of paint and for painting larger areas.

• Nozzle:-

Nozzles are used for three purposes: to distribute a liquid over an area, to increase liquid surface area, and create impact force on a solid surface. A wide variety of spray nozzle applications use a number of spray characteristics to describe the spray.

• Pressure gauge:-

Pressure gauges are designed to fit existing air storage tank. Each gauge is hermetically sealed to prevent moisture from entering  during washdown

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