Paper:
Design of an Arc-Core Moving Mechanism for Injection Molding Using a Link and Cam Mechanism
Takashi Harada*,, Naomichi Tanaka**, and Takayuki Fujitsuka***
*Department of Mechanical Engineering, Faculty of Science and Engineering, Kindai University
3-4-1 Kowakae, Higashiosaka, Osaka 577-8502, Japan
Corresponding author
**Graduate School of Science and Engineering, Kindai University, Higashiosaka, Japan
***Fujitsuka Seimitsu Kanagata Co., Ltd., Higashiosaka, Japan
A novel plastic injection mold design for a product with a deep arc-hole based on the kinematic analysis is proposed. To move the wide angle arc-core, a hybrid mechanism combining a slider-crank and a swing cam is designed. The force transmission coefficient of the slider-crank and the pressure angle of the swing cam are used to evaluate the dimensions of the mechanism. The motion of the designed mechanism was confirmed by using a prototype made with a 3D printer.
- [1] D. O. Kazmer, “Injection Mold Design Engineering,” 2nd Ed., Hanser, 2016.
- [2] G. Menges, W. Michaeli, and P. Mohren, “How to Make Injection Molds,” 3rd Ed., Hanser, 2001.
- [3] D. M. Bryce, “Plastic Injection Molding, Vol.III: Mold Design and Construction Fundamentals,” Society of Manufacturing Engineers, 1998.
- [4] R. Daniel, “Injection Moulds for Beginners,” Hanser, 2016.
- [5] Y. Murata and M. Kuramochi, “Development of Heating and Cooling Injection Mold with Far-Infrared Radiation Heater,” Int. J. Automation Technol., Vol.10, No.1, pp. 79-86, 2016.
- [6] Y. Murata, M. Koike, and S. Pan, “Improving the Properties of Injection Molded Products with Induction Heating and Cooling Molds,” Int. J. Automation Technol., Vol.9, No.1, pp. 3-9, 2015.
- [7] Y. Murata, H. Suzuki, and S. Kashiwagi, “Development of an Injection Mold Capable of Melt Flow Control and Induction Heating and Cooling,” Int. J. Automation Technol., Vol.11, No.6, pp. 985-992, 2017.
- [8] K. Yoshida, K. Ootsuki, and K. Hirose, “Flow Analysis of Insert Molding Using Injection Molding CAE,” Int. J. Automation Technol., Vol.11, No.1, pp. 81-83, 2017.
- [9] T. Kaburagi, M. Kurose, T. Ogawa, H. Kuroiwa, and T. Iwasawa, “Investigation of Flow and Sink Initiation Process in Mold Shapes in Injection Molding,” Int. J. Automation Technol., Vol.9, No.1, pp. 10-18, 2015.
- [10] H. Koresawa, H. Fujimaru, and H. Narahara, “Improvement in the Permeability Characteristics of Injection Mold Fabricated by Additive Manufacturing and Irradiated by Electron Beams,” Int. J. Automation Technol., Vol.11, No.1, pp. 97-103, 2017.
- [11] H. Koresawa, H. Fukumaru, M. Kojima, J. Iwanaga, H. Narahara, and H. Suzuki, “Design Method for Inner Structure of Injection Mold Fabricated by Metal Laser Sintering,” Int. J. Automation Technol., Vol.6, No.5, pp. 584-590, 2012.
- [12] T. Sawa, “Automating the Mold-Material Grinding Process,” Int. J. Automation Technol., Vol.13, No.6, pp. 722-727, 2019.
- [13] Y. Murata, H. Suzuki, and S. Kashiwagi, “Development of an Injection Mold Capable of Melt Flow Control and Induction Heating and Cooling,” Int. J. Automation Technol., Vol.11, No.6, pp. 985-992, 2017.
- [14] A. C. Lin and N. H. Quang, “A multiple slicing approach to automatic generation of parting curves,” Proc. IMechE Part B: J. Engineering Manufacture, Vol.239, Issue 12, pp. 2165-2181, 2016.
- [15] A. C. Lin and M. Effendi, “Finding Pull Directions for Interference-free Mould Openings,” MATEC Web of Conf., Vol.82, 01003, pp. 1-6, 2016.
- [16] A. C. Nee, M. W. Fu, J. Y. H. Fu, K. S. Lee, and Y. F. Zhang, “Determination of Optimal Parting Directions in Plastic Injection Mold Design,” CIRP Annals, Vol.46, Issue 1, pp. 429-432, 1997.
- [17] H. Guijian, L. Xuemer, W. Xiaoyu, and L. Jibin, “Application of Core-pulling Mechanism in Injection Mould Design,” Proc. of Int. Conf. on Industrial Mechatronics and Automation, pp. 482-484, 2009.
- [18] https://www.spark-mould.com/side-core-pulling-mechanism/ [Accessed November 2, 2020]
- [19] M. Sorimoto, “Undercut Processing Mechanism,” Japan Patent JP 201235480A, 2012 (in Japanese).
- [20] T. Matsui, “Method for Injection Molding Having Curved Hole and Its Mold,” Japan Patent JP3776687, 2006 (in Japanese).
- [21] C. Wang and H. Jun, “Guide rail type arc swinging core-pulling mechanism,” Chinese Patent CN103862634A, 2014 (in Chinese).
- [22] T. Fujitsuka, “A rotating core mechanism using ball-spline,” Japan Plastics, Vol.69, No.12, pp. 36-44, 2018 (in Japanese).
- [23] T. Harada and Y. Kunishige, “Singularity Free Mode Changes of a Redundantly Driven Two Limbs Six-Dof Parallel Robot,” Proc. of ROMANSY 23 – Robot Design, Dynamics and Control, Springer, pp. 405-413, 2020.
- [24] S. Inada, H. Morita, R. Nagase, and T. Harada, “Mechanics,” 2nd Ed., Ohmusha, 2016 (in Japanese).
- [25] J. Angeles and C. S. López-Cajún, “Optimization of Cam Mechanisms,” Springer, 1991.
- [26] F. Y. Chen, “Mechanics and Design of Cam Mechanism,” Pergamon Press, 1982.
- [27] J. M. McCarty and G. G. Soh, “Geometric Design of Linkages,” 2nd Ed., Springer, 2010.
This article is published under a Creative Commons Attribution-NoDerivatives 4.0 Internationa License.