The cooling of the pressing device in the glass industry


  • P Salac
  • M Stary



In this article we investigate the problem of shape optimization of the cooling cavity of the plunger used in the forming process in the glass industry. A rotationally symmetrical system consisting of the mould, the glass piece, the plunger and the plunger cavity is considered. The state problem is given as a stationary head conduction equation. The system has a given heat source which represents the glass piece and is cooled by flowing water inside the plunger cavity and by the environment of the mould on the outside. The design variable is taken to be the shape of inner surface of the plunger cavity. According to the results of the verification experiments, it is possible to claim that the numerical optimization that was achieved brought about a significant improvement. Further an unsteady periodic experiment representing the cyclical movement in a realistic working mode was performed to examine the effect of replacing it with the static model.


Bertram L. A., Zanner F. J.: Convective Simulation in Metal Solidification, Stability in Convective Flows, ASME, New York (1986), pp. 99-107.

Fukusako S., Seki N.: Fundamental Aspects of Analytical and Numerical Methods on Freezing and Melting Heat Transfer Problems, Annual Review of Numerical Fluid Mechanics and Heat Transfer (1987), vol. 1, pp. 351-402.

Salač P.: Optimal design of the cooling plunger cavity. Appl. Math. 58 (2013), (DOI) 10.1007/s10492-013-0020-8, ISSN 0862-7940, pp. 405-422.

Salač P.: Shape optimization of the regulation current body. Applied Mathematical Modelling. (offered to publish).

Starý M., Salač P.: Verification of Plunger Cooling for Glass Forming in Real Working Mode. EPJ Web of Conferences (2012), Vol. 25, Article No. 01089, source: International conference, Experimental Fluid Mechanics 2011, Jíčín, 22. - 25. 11. 2011, pp. 966-970, ISBN 978-80-7372-784-0.

Šorin S. N.: Sdílení tepla. SNTL, Praha (1968).

Viskanta R.: Heat Transfer During Melting and Solidification of Metals, Journal of Heat Transfer, ASME, New York (1988), vol. 110, iss. 4b, pp. 1205-1219.



How to Cite

Salac, P. and Stary, M. (2013) “The cooling of the pressing device in the glass industry”, The International Journal of Multiphysics, 7(3), pp. 207-218. doi: 10.1260/1750-9548.7.3.207.