Indian Journal of Science and Technology

Open Access Open Access  Restricted Access Subscription Access

Design and Optimization of the Housing of Spray Unit of a Linear Motor Operated Spray Gun


Affiliations
1 Department of Mechanical Engineering, College of Engineering, Universiti Tenaga Nasional (UNITEN), Jalan IKRAM-UNITEN, 43000, Kajang, Selangor, Malaysia
2 Department of Electrical Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), 43400 UPM Serdang, Selangor, Malaysia
 

Pneumatic system is normally used to trigger the automatic spray gun for conventional spray operations. Highly skilled labors and a number of adjustable knobs are required to produce the high quality coating works using the conventional automatic spray gun which is cost intensive. Therefore, linear motor operated multiple spray operations spray gun has been developed. This spray gun consists of two spray units, an air control and supply unit and a triggering unit to carry out the multiple spray operations. This paper focuses on the design optimization and fabrication of the housing of the spray units which hold fluid nozzles, air nozzles, an assembly cap, a needle valve or a ball valve. In the air less and air assisted airless spray systems, high pressurized liquid is passed through the nozzle which is held by the housing of the spray unit. Before entering into the nozzle, the high pressurized liquid is passed through the housing. For the simplicity of the analysis, it is assumed that the housing is an open-ended pressure vessel. From the analysis, dimensions and material selection have been optimized and finally the spray units have been fabricated and tested. During the performance test it is seen that satisfactory transfer efficiency of spray operation has been achieved by using newly developed spray housing of the spray units, which proves the stability of the spray housing during high pressure operation.

Keywords

Spray Gun, Spray Process, Design, Pressure Vessel, Failure Analysis, Deflection Analysis
User

  • Hund, J P (1995). Spray application processes. JPH finishing consultants, 181–197.

  • Brajdich T, Hagman M et al. (1995). Atomization- Concept and theory training GRACO, 1–16.

  • Lefebvre A H (1989). Atomization and spray, Chapter 2, New York: Hamisphere publishing corporation, 105–150.

  • Colbert S A, and Cairncross R A (2005). A computer simulation for predicting electrostatic spray coating patterns, Powder Technology, vol 151(1–3), 77–86.

  • Meesters G M, Zevenhoven C A P et al. (1990). Fast computer simulation of open-air electrostatic spray painting, Journal of Electrostatics, vol 25, 265–275.

  • Bologa A M, and Makalsky L M (1989). Electrostatic pneumatic sprayer of water solutions, Journal of Electrostatics, vol 23, 227–233.

  • Bailey A G, Hashish A H et al. (1998). Drug delivery by inhalation of charged particles, Journal of Electrostatics, vol 44, 3–10.

  • Bjoring, G., & Hagg, G. M. (2000). The ergonomics of spray guns-User’s opinions and technical measurements on spray guns compared with previous recommendations for hand tools, International Journal of Industrial Ergonomics, vol 25, 405–414.

  • Lee, C. C, Nelson, J. E., Davis, K. G.,&Marras, W.S. (1997).An ergonomic comparison of industrial spray paint guns.International Journal of Industrial Ergonomics, 19, 425–435.

  • Markus S, and Fritsching C C U (2004). Analysis of deposit growth in spray forming with multiple atomizers, Materials Science and Engineering A, vol 383, 166–174.

  • Nasr G G, Yule A J et al. (2002). Industrial sprays and atomization, Chapter 3, New York: Springer Verlag, 35–64.

  • Nonnenmacher S and Piesche M (2000). Design of hollow cone pressure swirl nozzle to atomize Newtonian Fluids, Chemical Engineering Science, vol 55(19), 4339–4348.

  • Mayer W O H, and Branam R (2004). Atomization characteristics on the surface of a round liquid jet, Experiments in Fluids, vol 36, 528–539.

  • Hattle J H, and Pryds N H (2004). A unified spray forming model for the prediction of billet shape geometry, Acta Materialia, vol 52(18), 5275–5288.

  • Ye Q, Steigleder T et al. (2002). Numerical simulation of the electrostatic powder coating process with a corona spray gun, Journal of Electrostatics, vol 54(2), 189–205.

  • Ellis M C B, Swan T et al. (2002). Design Factors affecting spray characteristics and drift performance of air induction nozzles. Biosystem Engineering, vol 182(3), 289–296.

  • Shavit U (2001). Gas-liquid interaction in the liquid breakup region of twin fluid atomization, Experiments in Fluids, vol 31(5), 550–557.

  • Jacque D R, Heethius B E et al. (2010). Portable powered foaming sprayer, United States Patent, Patent No. US7753290.

  • Amari M, Murata M et al. (2010). Electrostatic coating spray gun, United States Patent, Patent No. US7748651.

  • Merchant M (2010). Spray gun, United States Patent, Patent No. US7744019.

  • Peterson C, Torntore A J et al. (2010). Texture sprayer, United States Patent, Patent No. US7731104; 2010.

  • Roumanis G (2010). Hand held dual nozzle spray gun and system, United States Patent, Patent No. US7726589.

  • Hartle R J, Mancini D L et al. (2002). Modular fluid spray gun, United States Patent, Patent No. 6460787B.

  • Parvez I, Aris I et al. (2011). Thrust analysis and measurement of a tubular linear permanent magnet motor in spray application, Journal of Japan Society of Applied Electromagnetics and Mechanics, vol 19(S), S83–S86.

  • Parvez I, Aris I et al. (2011). Design process involved in developing mechanism of linear motor operated multiple spray operations spray gun, Australian Journal of Basic and Applied Sciences, vol 5(7), 843–850.

  • Parvez I, Aris I et al. (2011). Analysis of thrust constant, electrical and mechanical time constant of a tubular linear permanent magnet motor in spray application, 8th International Symposium on Linear Drives for Industry Application, Netherland.

  • Sigley J E and Mischke C R (2003). Mechanical engineering design, 6th Edn., Chapter 4, New York: McGraw Hill, 178–200.

  • Hamrok J B, Schmid S R et al. (2006). Fundamental of machine elements, 3rd Edn., Chapter 6, New York: McGraw Hill, 235–250.

  • Jalaludeen S M (2000). Machine design, Kanpur, India: Anuradha Agencies, Chapter 3, 31–45.

  • Hibbeler R C (2005). Mechanics of Materials, 6th Edn, Chapter 5, New York: Prentice Hall, 185–228.


Abstract Views: 406

PDF Views: 0




  • Design and Optimization of the Housing of Spray Unit of a Linear Motor Operated Spray Gun

Abstract Views: 406  |  PDF Views: 0

Authors

A. K. M. ParvezIqbal
Department of Mechanical Engineering, College of Engineering, Universiti Tenaga Nasional (UNITEN), Jalan IKRAM-UNITEN, 43000, Kajang, Selangor, Malaysia
IshakAris
Department of Electrical Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), 43400 UPM Serdang, Selangor, Malaysia
M. M. Rahman
Department of Mechanical Engineering, College of Engineering, Universiti Tenaga Nasional (UNITEN), Jalan IKRAM-UNITEN, 43000, Kajang, Selangor, Malaysia
NorhisamMisron
Department of Electrical Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), 43400 UPM Serdang, Selangor, Malaysia

Abstract


Pneumatic system is normally used to trigger the automatic spray gun for conventional spray operations. Highly skilled labors and a number of adjustable knobs are required to produce the high quality coating works using the conventional automatic spray gun which is cost intensive. Therefore, linear motor operated multiple spray operations spray gun has been developed. This spray gun consists of two spray units, an air control and supply unit and a triggering unit to carry out the multiple spray operations. This paper focuses on the design optimization and fabrication of the housing of the spray units which hold fluid nozzles, air nozzles, an assembly cap, a needle valve or a ball valve. In the air less and air assisted airless spray systems, high pressurized liquid is passed through the nozzle which is held by the housing of the spray unit. Before entering into the nozzle, the high pressurized liquid is passed through the housing. For the simplicity of the analysis, it is assumed that the housing is an open-ended pressure vessel. From the analysis, dimensions and material selection have been optimized and finally the spray units have been fabricated and tested. During the performance test it is seen that satisfactory transfer efficiency of spray operation has been achieved by using newly developed spray housing of the spray units, which proves the stability of the spray housing during high pressure operation.

Keywords


Spray Gun, Spray Process, Design, Pressure Vessel, Failure Analysis, Deflection Analysis

References





DOI: https://doi.org/10.17485/ijst%2F2013%2Fv6i8%2F36639