Title: Modelling the critical factors to control the warpage defect in a housing unit in a braking system using the analytic hierarchy process

Authors: V. Sivabharathi; Roshni Pradhan; K. Mathiyazhagan; A. Senthil Kumar

Addresses: Department of Mechanical Engineering, St. John College of Engineering and Management, Palghar, Maharashtra, 401404, India ' Department of Mechanical Engineering, The NorthCap University, Gurgaon, 122017, Haryana, India ' Department of Mechanical Engineering, Amity School of Engineering and Technology (ASET), Amity University, Sector 125, Noida, 201303, UP, India ' University College of Engineering, A Constituent College of Anna University, Chennai, Panikkankuppam, Panruti, Tamil Nadu 607106, India

Abstract: Warpage is one of the defects in the injection-moulded housing unit used in the hydraulic brake system. It is a dimensional distortion present in a moulded product after it is ejected from the mould at the end of the injection moulding process. Literature review and discussion with experts were used to identify the critical factors which are responsible for the warpage defect of housing used in the hydraulic braking system. The analytic hierarchy process (AHP) is used to analyse and ranked the critical factors for warpage defect. The results can act as a benchmark during the injection moulding process for the tactful handling of critical factors to reduce the warpage. Also, it is inferred from the results, that pressure is the highest-ranked critical factors followed by geometry, temperature and time respectively. A total of 22 critical factors were identified using literature review and by discussing with industrial experts.

Keywords: warpage defect; critical factors; analytic hierarchy process; AHP; injection moulding; India.

DOI: 10.1504/IJPQM.2022.124439

International Journal of Productivity and Quality Management, 2022 Vol.36 No.1, pp.127 - 149

Received: 13 Jun 2019
Accepted: 05 Aug 2019
Published online: 26 Jul 2022 *

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