Home Statistical Approach to Analyze the Warpage, Shrinkage and Mechanical Strength of Injection Molded Parts
Article
Licensed
Unlicensed Requires Authentication

Statistical Approach to Analyze the Warpage, Shrinkage and Mechanical Strength of Injection Molded Parts

  • N. Hadler Marins , F. Bier de Mello , R. Marques e Silva and F. Aulo Ogliari
Published/Copyright: June 23, 2016
Become an author with De Gruyter Brill
Submit Manuscript Author Information
International Polymer Processing
From the journal International Polymer Processing Volume 31 Issue 3

Abstract

The aim of this study is to assess the effects of different parameters of the injection molding process in warpage, shrinkage, and mechanical properties of the plastic parts using the Taguchi method and the Analysis of Variance (ANOVA). The polyacetal copolymer (POM) and acrylonitrile-butadiene-styrene copolymer (ABS) were injected; and then the following processing parameters were analyzed: the mold temperature, holding pressure, holding time, melt temperature, cooling time, mold water flow, and injection speed. According to the results, statistically the most significant parameters in shrinkage were the mold temperature and cooling time for the POM molded parts; and the holding time and holding pressure for the ABS molded parts. The most significant parameters in warpage and flexural strength were the holding time and holding pressure for the POM and ABS parts, respectively. A multiple linear regression analysis was carried out to predict a theoretical ideal experiment to maximize the results.

*Correspondence address, Mail address: Natália Hadler Marins, Federal University of Pelotas, Street Félix da Cunha, 809, Pelotas, RS, Brazil, Zip code: 96010-000. E-mail:

References

Altan, M., “Reducing Shrinkage in Injection Moldings via the Taguchi, Anova and Neural Network Methods”, Mater. Des., 31, 599–604 (2010) 10.1016/j.matdes.2009.06.049Search in Google Scholar

Bernal, C. R., Frontini, P. M., Sforza, M. and Bibbó, M. A., “Microstructure, Deformation, and Fracture Behavior of Commercial ABS Resins”, J. Appl. Polym. Sci., 58, 1–10 (1995) 10.1002/app.1995.070580101Search in Google Scholar

Chang, T. C., Faison, E., “Shrinkage Behavior and Optimization of Injection Molded Parts Studied by the Taguchi Method”, Polym. Eng. Sci., 41, 703–710 (2001) 10.1002/pen.10766Search in Google Scholar

Chaulia, P. K., Das, R., “Process Parameter Optimization for Fly Ash Brick by Taguchi Method”, Mater. Res., 11, 159–164 (2008) 10.1590/S1516-14392008000200008Search in Google Scholar

Erzurumlu, T., Ozcelik, B., “Minimization of Warpage and Sink Index in Injection-Molded Thermoplastic Parts Using Taguchi Optimization Method”, Mater. Des., 27, 853–861 (2006) 10.1016/j.matdes.2005.03.017Search in Google Scholar

Guerrica-Echevarría, G., Eguiazábal, J. I. and Nazábal, J., “Influence of the Preparation Method on the Mechanical Properties of a Thermotropic Liquid Crystalline Copolyester”, Polym. Test., 20, 403–408 (2001) 10.1016/S0142-9418(00)00050-7Search in Google Scholar

Huang, M.-C., Tai, C.-C., “Effective Factors in the Warpage Problem of an Injection-Molded Part with a Thin Shell Feature”, J. Mater. Process. Technol., 110, 1–9 (2001) 10.1016/S0924-0136(00)00649-XSearch in Google Scholar

Kenig, S., Ben-David, A., Omer, M., and Sadeh, A., “Control of Properties in Injection Molding by Neural Networks”, Eng. Appl. Artif. Intell., 14, 819–823 (2001) 10.1016/S0952-1976(02)00006-4Search in Google Scholar

Kuram, E., Timur, G., Ozcelik, B. and Yilmaz, F., “Influences of Injection Conditions on Strength Properties of Recycled and Virgin PBT/PC/ABS” Mater. Manuf. Process., 29, 37–41 (2014) 10.1080/10426914.2014.941481Search in Google Scholar

Narisawa, I., Ishikawa, M., “Crazing in Semicrystalline Thermoplastics”, Adv. Polym. Sci., 91/92, 53–391 (2005) 10.1007/BFb0018025Search in Google Scholar

Ozcelik, B., Erzurumlu, T., “Comparison of the Warpage Optimization in the Plastic Injection Molding Using Anova, Neural Network Model and Genetic Algorithm”, J. Mater. Process. Technol., 171, 437–445 (2006) 10.1016/j.jmatprotec.2005.04.120Search in Google Scholar

Ozcelik, B., Ozbay, A. and Demirbas, E., “Influence of Injection Parameters and Mold Materials on Mechanical Properties of ABS in Plastic Injection Molding”, Int. Commun. Heat Mass Transf., 37, 1359–1365 (2010) 10.1016/j.icheatmasstransfer.2010.07.001Search in Google Scholar

Postawa, P., Koszkul, J., “Change in Injection Moulded Parts Shrinkage and Weight as a Function of Processing Conditions”, J. Mater. Process. Technol., 162–163, 109–115 (2005) 10.1016/j.jmatprotec.2005.02.241Search in Google Scholar

Shen, C., Wang, L. and Li, Q., “Optimization of Injection Molding Process Parameters Using Combination of Artificial Neural Network and Genetic Algorithm Method”, J. Mater. Process. Technol., 183, 412–418 (2007) 10.1016/j.jmatprotec.2006.10.036Search in Google Scholar

Spina, R., Spekowius, M., Dahlmann, R. and Hopmann, C., “Analysis of Polymer Crystallization and Residual Stresses in Injection Molded Parts”, Int. J. Precis. Eng. Manuf., 15, 89–96 (2014) 10.1007/s12541-013-0309-2Search in Google Scholar

Ting, P.-H., Hsu, C.-I. and Hwang, J.-R., “Optimization of the Wear Properties of Polyoxymethylene Components under Injection Process Conditions”, Polym. Plast. Technol. Eng., 49, 892–899 (2010) 10.1080/03602551003681853Search in Google Scholar

Xavier, S. F., Tyagi, D. and Misra, A., “Influence of Injection-Molding Parameters on the Morphology and Mechanical Properties of Glass Fiber-Reinforced Polypropylene Composites”, Polym. Compos., 3, 88–96 (1982). 10.1002/pc.750030207Search in Google Scholar

Received: 2015-12-07
Accepted: 2016-03-06
Published Online: 2016-06-23
Published in Print: 2016-07-30

© 2016, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Estimation of Bulk Melt-Temperature from In-Mold Thermal Sensors for Injection Molding, Part B: Validation
  5. Online Measurement of Electrospinning Jet Velocity of Polyvinyl Alcohol
  6. Rheological Characterization and Thermal Stability of Different Intrinsic Viscosity Poly(ethylene terephthalate) in Air and Nitrogen
  7. Ethylene Methyl Acrylate Copolymer Toughened Poly(lactic acid) Blends: Phase Morphologies, Mechanical and Rheological Properties
  8. Comparative Effects of mEOC on the Structures and Properties of PP/SGF and PP/EOC/SGF Composite Foams
  9. Development of Styrenic Copolymers for Improving Heat Resistance of Poly(methyl methacrylate)
  10. Study of Dispersive and Distributive Mixing in a Converging Pipe
  11. Investigation of Surface Roughness and MRR for Engineering Polymers with the Abrasive Water Jet Turning Process
  12. Recycling the Cork Powder in a PVC-Based Composite Material: Combined Effect on Physico-Mechanical and Thermal Properties
  13. Influences on the Magnetic Properties of Injection Molded Multipolar Rings
  14. PMMA Micro-Pillar Forming in Micro Channel by Hot Embossing
  15. Experimental Investigation and Modeling of a New High Speed Coating Process
  16. Statistical Approach to Analyze the Warpage, Shrinkage and Mechanical Strength of Injection Molded Parts
  17. Optical Properties of HDPE in Injection Molding and Injection Press Molding for IR System Lenses
  18. PPS News
  19. PPS News
  20. Seikei Kakou Abstracts
  21. Seikei-Kakou Abstracts
https://doi.org/10.3139/217.3219

Articles in the same Issue

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Estimation of Bulk Melt-Temperature from In-Mold Thermal Sensors for Injection Molding, Part B: Validation
  5. Online Measurement of Electrospinning Jet Velocity of Polyvinyl Alcohol
  6. Rheological Characterization and Thermal Stability of Different Intrinsic Viscosity Poly(ethylene terephthalate) in Air and Nitrogen
  7. Ethylene Methyl Acrylate Copolymer Toughened Poly(lactic acid) Blends: Phase Morphologies, Mechanical and Rheological Properties
  8. Comparative Effects of mEOC on the Structures and Properties of PP/SGF and PP/EOC/SGF Composite Foams
  9. Development of Styrenic Copolymers for Improving Heat Resistance of Poly(methyl methacrylate)
  10. Study of Dispersive and Distributive Mixing in a Converging Pipe
  11. Investigation of Surface Roughness and MRR for Engineering Polymers with the Abrasive Water Jet Turning Process
  12. Recycling the Cork Powder in a PVC-Based Composite Material: Combined Effect on Physico-Mechanical and Thermal Properties
  13. Influences on the Magnetic Properties of Injection Molded Multipolar Rings
  14. PMMA Micro-Pillar Forming in Micro Channel by Hot Embossing
  15. Experimental Investigation and Modeling of a New High Speed Coating Process
  16. Statistical Approach to Analyze the Warpage, Shrinkage and Mechanical Strength of Injection Molded Parts
  17. Optical Properties of HDPE in Injection Molding and Injection Press Molding for IR System Lenses
  18. PPS News
  19. PPS News
  20. Seikei Kakou Abstracts
  21. Seikei-Kakou Abstracts
Sign up now to receive a 20% welcome discount
Institutional Access
How does access work?
Have an idea on how to improve our website?
Please write us.
© 2025 De Gruyter Brill
Downloaded on 15.10.2025 from https://www.degruyterbrill.com/document/doi/10.3139/217.3219/html?lang=en&srsltid=AfmBOopKOHeTL4tHgqsl84TxVvDIXrL3iAp9r-O6c1LKzfdvXcaLe1zs
Scroll to top button