Yüksek Performanslı Polimerlerde Hacimsel Çekmenin Mold Flow Analizleri ile Belirlenmesi

Year 2023, Issue: 51, 203 - 208, 31.08.2023

Hasan Öktem , Halit Karasungur

https://doi.org/10.31590/ejosat.1283359

Abstract

Yüksek performanslı ileri polimerler ile plastik ürünlerin basımında oluşabilecek ölçüsel hataların daha önceden belirlenmesinde, günümüz teknolojisinde bilgisayar destekli mühendislik analizlerinden önemli ölçüde yararlanılmaktadır. Bu çalışmada, farklı enjeksiyon sıcaklığına sahip PPS (Polipropilen Sülfit) ve PK (Poliketon) gibi yüksek performanslu ileri polimerler ile ürün basımı sonrasında meydana gelebilecek ölçüsel hataların, Mold Flow plastik analiz programı ile tahmin edilmesi hedeflenmiştir. Bu amaç için Taguchi deneysel tasarıma göre (L9) planlanmış 18 Mold Flow analizi gerçekleştirilmiştir. Analizlerde, eriyik sıcaklığı, soğutma süresi ve yolluk giriş yeri gibi üç enjeksiyon şartı kullanılarak, hacimsel çekme değerleri elde edilmiştir. Çalışma sonrasında, hacimsel çekmeden kaynaklı ölçüsel hatalar üzerinde en etkili enjeksiyon şartının öncelikle yolluk giriş yeri ve sonra da eriyik sıcaklığı olduğu görülmüştür. Sonuç olarak, Mold flow akış analizleri sayesinde plastik ürünün basım süreçleri daha önceden belirlenerek maliyet üzerinde önemli kazançlar sağlanabilir.

Keywords

Yüksek performanslı polimerler, Ölçüsel hatalar, Moldflow analizleri

Supporting Institution

GÜNEŞ PLASTİK KALIP SANAYİ TİCARET A.Ş.

Project Number

-

Thanks

Güneş Plastik Kalıp Sanayi A.Ş. ve çalışanlarına teşekkür ederiz

Determination of Volumetric Shrinkage in High Performance Polymers by Mold Flow Analyses

Abstract

In today's technology, computer-aided engineering analyzes are used to determine the dimensional errors that may occur in the injection of high-performance advanced polymers and plastic products. In this study, it is proposed to determine the dimensional errors that may occur after product injection with high performance advanced polymers such as PPS (Polypropilen Sulfite) and PK (Polyketone) with different injection temperatures, with the Mold Flow plastic flow analysis program. For this purpose, 18 Mold Flow analyzes planned according to Taguchi experimental design (L9) were conducted. In the analyses, volumetric shrinkage values were obtained by using three injection conditions such as melt temperature, cooling time and runner gate. After the study, it was seen that the most effective injection condition on the dimensional errors caused by volumetric shrinkage was firstly the runner gate and then the melt temperature. As a result, thanks to Mold flow flow analysis, the injection processes of the plastic product can be determined in advance, and significant savings can be achieved on the cost.

Keywords

High performance polymers, Dimensional errors, Mold Flow analyses.

Project Number

-

References

• Akyüz, Ö.F. (2006). Introduction of Plastics and Plastic Technologies, (3rd ed.), PAGEV Publications, İstanbul.
• Akkurt, S. (2007). Plasctic Material Science and Mold Design, Birsen Publications, (1st ed.), İstanbul.
• Arıcıoğlu, M.K., Mert, B., Soydan, Y. (2000). Mechanical analysis methods of Polymer materials, Journal of Sakarya University Natural Sciences, 1, 2, 51-58.
• Barghikar, H. Mosaddegh, P., Masoumi, M., Ranjbar M. (2019). The Effect of Packing Phase and Mold Temperature on The Directional Warpage of Spherical Lenses using The Injection Molding Process, SN Applied Sciences, 1, 598. doi: 10.1007/s42452-019-0615-0.
• Beaumont, J.P., Nagel, R., Sherman, R. (2002). Successful Injection Molding: Hanser/Gardner Publications Inc., Cincinati, USA.
• Campo, A. (2008). Selection of polymeric materials, William Andrew Publishing, Norwich, USA.
• Chavan, H.A, Wani V.P., Suryawanshi, S.R. Optimization of number of gates in plastic cladding tool with the help of mold flow analysis, Materials Today: Proceedings, Article in Press, 2023. doi:10.1016/j.matpr.2023.01.347
• Çakır, Y., Özdemir, A., Güldaş, A. (2001). Investigation of injection parameters affecting shrinkage amount in plastic products, Journal of Technology, 1-2, 19-29.
• Deepika, S.S., Patil, B. T., Shaikh, A. V. (2020). Plastic injection molded door handle cooling time reduction investigation using conformal cooling channels, Materials Today: Proceedings, 27,519-523. doi:10.1016/j.matpr.2019.11.316.
• Ezdeşir, A., Erbay, E., Taşkıran, İ., Yağcı, M.A., Cöbek, M., Bilgiç, T. (2006). Polimerler 1(3rd ed.), PAGEV Publications, İstanbul.
• Iyer, N., Ramani, K. (2002). A study of localized shrinkage in injection molding with high thermal conductivity molds, Journal of Injection Moulding Technology, 6 (2), 73-90. Corpus ID: 138699982.
• Jansen, K.M.B., Van Dijk D.J., Husselman M.H. (1998). Effect of processing conditions on shrinkage in injection molding, Polymer Engineering Science, 38(5), 838-846. doi: 10.1002/pen.10249.
• Liao, S.J., Chang, D., Chen, H.J., Tsou, L.S., Ho, J.R., Yau, H.T. (2004). Optimal Process Conditions of Shrinkage and Warpage of Thin Wall Parts”. Polymer Engineering Science, 44, 917-928. doi: 10.1002/pen.20083.
• Minitab Statistical Software, Release 16, (2007). Making data analysis easier, State College, Minitab Corperation, USA.
• Moldblade, Plastic Injection Moulding: Main Defects in Injection Moulded Parts. (2022) .https://moldblade.com/en/plasticinjection-moulding-main-defects-in-injection-moulded-parts/. [Accessed: Dec, 30, 2022].
• MFI, (2005). Mold Flow Plastik Insigt Software, Autodesk Coorperation Inc.
• Huan, M.S., Chen, J.Y., Xiao, Y.Q. (2022). Quality Monitoring of Micro-shrinkage Defects in Thick-walled Injection Molded Components, Measurement, 201, 111733. doi.org/10.1016/j.measurement.2022.111733.
• Öktem, H., Karasungur, H., Eroğlu, A. Analysis of High Performance Advanced Polymers Reinforced with Glass Fiber, Gazi University Natural Science Journal, accepted March 20, 2023.
• Öktem, H. (2012). Optimum process conditions on shrinkage of an injected-molded part of DVD-ROM cover using Taguchi robust method, The International Journal of Advanced Manufacturing Technology, 61, 19-528. doi: 10.1007/s00170-011-3750-3
• Montgomery, D.C. (2005). Design and Anaysis of Experiments, John Wiley & Sons Inc., Sixth Edition, USA.
• Savaşçı, Ö.T. Uyanık, N. Kovalı, G. Plastics and Plastic Technology with Basic Lines, İstanbul: 3rd edition, PAGEV Publications, 2008.
• Zhou, X., Zhang, Y., Yu, W., Li, M. Chen, Y., Zhou, H. (2020). An imaging performance analysis method correlated with geometrical deviation for the injection molded high-precision aspheric negative plastic lens, Journal of Manufacturing Processes, 58, 1115-1125. doi: 10.1016/j.jmapro.2020.09.017.