Abstract
Rapid heat cycle molding (RHCM) technology has become an alternative for classic injection molding and it is consist of the rapid control of the temperature of mold or forming surfaces. Despite widely used in the plastics industry, there are some problems with rapid, balanced cooling. The primary problem during the cooling stage is to ensure the balanced and uniform heat removal from cooled material and suitable dynamic of the entire process, as to avoid molding’s defects. This article presents the simulation research of various geometry of cooling channels, which can be used in RHCM technology to improve the efficiency of a cooling process. Authors proposed the use of finned channels, which can guarantee the most effective heat transfer. The analysis and comparison of proposed channels show the advantage over conventional channels commonly used in injection molds. To more clearly show the correlation between the geometry of cooling channels, the flow state of working fluid and the heat transfer, the dependencies of the Nusselt and the Reynolds number are evaluated and presented. The investigation results lead to possibility of reducing the cooling phase and thus the production time of entire injection cycle.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Kurt, M., Kamber, S., Kaynak, Y., Atakok, G., Girit, O.: Experimental investigation of plastic injection molding: Assessment of the effects of cavity pressure and mold temperature on the quality of the final products. Mater. Des. 30(8), 3217–3224 (2009)
Chen, S.C., Jong, W.R., Chang, J.A.: Dynamic mold surface temperature control using induction heating and its effects on the surface appearance of weld line. J. Appl. Polym. Sci. 101(2), 1174–1180 (2006)
Hassan, H., Regnier, N., Le Bot, C., Defaye, G.: 3D study of cooling system effect on the heat transfer during polymer injection molding. Int. J. Therm. Sci. 49(1), 161–169 (2010)
Dawkins, E., Engelmann, P., Horton, K.: Color and gloss – the connection to process conditions. J. Injection Molding Technol. 2(1), 1–7 (1998)
Guilong, W., Guoqun, Z., Huiping, L., Yanjin, G.: Analysis of thermal cycling efficiency and optimal design of heating/cooling systems for rapid heat cycle injection molding process. Mater. Des. 31(7), 3426–3441 (2010)
Lucchetta, G., Fiorotto, M.: Influence of rapid mould temperature variation on the appearance of injection moulded parts. Strojniski Vestnik J. Mech. Eng. 59(11), 683–688 (2013)
Mrozek, K., Chen, S.C.: Selective induction heating to eliminate the fundamental defects of thin – walled moldings used in electrical industry. J. Appl. Polym. Sci. 134(26), 44992 (2017)
Guilong, W., Yang, H., Lei, Z., Guoqun, Z.: Research on temperature and pressure responses in the rapid mold heating and cooling method based on annular cooling channels and electric heating. Int. J. Heat Mass Transf. 116, 1192–1203 (2018)
Chen, S., Chang, Y., Chang, T., Chien, R.: Influence of using pulsed cooling for mold temperature control on microgroove duplication accuracy and warpage of the Blu-ray Disc. Int. Commun. Heat Mass Transf. 35, 130–138 (2008)
Vanaki, Sh.M., Mohammed, H.A.: Numerical study of nanofluid forced convection flow in channels using different shaped traverse ribs. Int. Commun. Heat Mass Transf. 67, 176–188 (2015)
Dirker, J., Meyer, J., Kohlmeyer, B.: Local heat transfer coefficients at the inlet of an annular flow passage. Int. J. Heat Mass Transf. 113, 268–280 (2017)
Fenot, M., Dorignac, E., Giret, A., Lalizel, G.: Convective heat transfer in the entry region of an annular channel with slotted rotating inner cylinder. Appl. Therm. Eng. 54, 345–358 (2013)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 Springer Nature Switzerland AG
About this paper
Cite this paper
Muszynski, P., Poszwa, P., Brzek, P. (2019). Numerical Study of Rapid Cooling of Injection Molds. In: Hloch, S., Klichová, D., Krolczyk, G., Chattopadhyaya, S., Ruppenthalová, L. (eds) Advances in Manufacturing Engineering and Materials. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-99353-9_57
Download citation
DOI: https://doi.org/10.1007/978-3-319-99353-9_57
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-99352-2
Online ISBN: 978-3-319-99353-9
eBook Packages: EngineeringEngineering (R0)