CAD / CAE integration and Tagushi method in finding parameters Injection molding of polypropylene plastic in 2 cavities plastic injection molds Plastic case study pencil box
Article Sidebar
Main Article Content
Abstract
An application of software simulation in flow of molten plastic for problem-solving in injection molding could reduce setup times and testing costs. However, the levels of factors have not been assigned for the best parameters. The tools of design of experiments (DOE) were used as applications with software simulations for simulating the flow of molten plastic. The results would show the real factors that affect to the defect in injected parts. This research used a software package for simulating the flow of molten plastic integrated design of experiment using Taguchi method. These methods were used for solve the defect of injected part, such as incomplete filling simulation of two mold cavities. The optimized injection parameters were used melt temperature, mold temperature, fill time and adjusting the injection gate size . Cause the complete filling part. The difference in filling time between two mold cavities decreases from 0.2953 seconds to 0.1332 seconds. The workpiece is complete. Previously, the area at the end of the pencil box lid was not completely injected.
Article Details
References
D.M. Bryce, Mold Tryouts and Optimizing the Injection Process, Texas: IPLAS Publishers, 2016
D.M. Bryce, Troubleshooting: A Guide for Injection Molders, Karviná: Techtrax Publishers, 2001
A.W.Birley, B.Haworthand, J.Batchelor, Physics of Plastics Processing, Properties and Materials Engineering, Carl Hanser Verlag GmbH & Co Publishers, New York, 1992
D.M. Bryce, Thermoplastic Trouble-shooting for Injection Molders, United States: Society of Plastic Engineers, 1991
P. Somjate, “Defects in molded plastic parts: causes and solutions,” Kasetsart Engineering Journal, vol. 22, no. 69, pp. 93-104, August 2009.
K. Jaeyoung, “Imbalance filling of multi-cavity tooling during powder injection molding,” Journal Powder Technology, vol. 257 pp.124-131, May 2014.
Y. Phichai, “Guidelines for designing and constructing plastic injection molds using technology CAD / CAE / CAM,” presented at the 2008 Kasetsart University Academic Conference Architecture and Engineering Natural Resources and Environment Branch, Bangkok, Thailand, January. 29-1, 2008.
K. Supakit, “The study of parameters affecting the quality of plastic injection products by the finite element method,” M.S. thesis, Department of Master Engineering Faculty of Mechanical Engineering Srinakharinwirot University, Bangkok, 2007 (in Thai)
P. Hong-Seok and D. Xuan-Phuong, “Development of a smart plastic injection mold with conformal cooling channels,” Procedia Manufacturing, vol. 10, pp. 48-59, July 2017.
I. Gnilitskyi, “Effects of anisotropic and isotropic LIPSS on polymer filling flow and wettability of micro injection molded parts,” Optics and Laser Technology, vol. 158, pp. 1-7, November 2022.
T. Wu, “Design optimization of plastic injection tooling for additive manufacturing,” Procedia Manufacturing, vol. 10, pp. 923-934, July 2017.
D. Supachai and S. Chakrit, “Injection molding of plastic parts using the CAD / CAE method,” Research and development edition. Engineering Institute of Thailand Under the Royal Patronage of His Majesty the King vol. 22, no. 69, pp. 65-75, July 2018.
M. Yunus, “Optimizing the Die Design Parameters of a Two Cavity Injection Moulding Tool for a Fan Blade Back Cover using Mold Flow Analysis,” International Journal in IT and Engineering, vol. 3, no. 6, pp. 92-103, June 2015.
S. Watchara, N. Jittiwat, W. Noppharit, “Analysis Shrinkage of Recycle Plastic Injection Molding by using Taguchi Methodology,” Ubon Ratchathani University Engineering Journal, vol. 12, no. 2, pp. 123-134, September 2017.
S. Watchara, “Flow Analysis of Plastic Injection Molds, Case Studies of Used Polymeric Methylene Plastics,” presented at the 2017 Annual Conference on Engineering Science Technology and Architecture, Khon Kaen, Thailand, July. 21, 2017.
S. Watchara, “Flow Analysis of Plastic Injection Molds, Case Studies of Used Polypropylene Plastics,” presented at the 2017 Rajamangala Institute of Technology Production and Routine Management, Chonburi, Thailand, December. 8, 2017.
S. Watchara, “Flow Analysis and Parameters of Injection Molding of Recycled Plastics, Case Study of Recycled Polypropylene Plastics from Saline Bags,” presented at the 2017 National Conference on Innovation and Academic Technology, Surin, Thailand, December. 26, 2017.
S. Watchara, “The study of the proper plastic injection process of recycled plastics that affect shrinkage with finite element research methodology. Case study of recycled polypropylene plastic from the basket,” presented at the 2017 Annual industrial engineering conference, Ubon Ratchathani, Thailand, July. 23-26, 2018.
W. Noppharit, “Flow Analysis of Plastic Injection Molds, Case Studies of Unused Polypropylene Plastics,” presented at the 2017 National Conference on Innovation and Academic Technology, Surin, Thailand, December. 26, 2017.
W. Noppharit, “Study of the flow behavior of plastic injection molds to find the appropriate parameters of the new 1088 P grade polypropylene pellets for forming a pencil box,” presented at the 2017 Rajamangala Academic Conference on Production Technology and Management, Krabi, Thailand, May. 30-31, 2018.
W. Noppharit, “Determination of the process parameters of polypropylene plastic injection with simulation methods forming case studies, pencil box products,” presented at the 2017 Annual industrial engineering conference, Ubon Ratchathani, Thailand, July. 23-26, 2018.