International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 04 | Apr 2025
p-ISSN: 2395-0072
www.irjet.net
Enhancing Precision in Plastic Component Design: A Comprehensive Review of Rib and Boss Identification and Validation Methodologies for Injection Molding Shreya Vijith1, H P Shinde2 1Student, Dept. of Mechanical Engineering, COEP Technological University, Pune, MH, India 2Proffessor, Dept. of Mechanical Engineering, COEP Technological University, Pune, MH, India
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Abstract - Designing injection-molded plastic components
parts, and aerospace components. In order to create the finished product, plastic is melted under heat, injected into a mold, cooled, and solidified. Despite its long history, injection molding has undergone constant improvement to handle emerging technological issues and new plastic varieties. [1] The rising demands of consumers and manufacturers have fueled the development of injection molding technology. This approach, which focuses on creating more potent and automated machinery, has become crucial in the sector. The production process is now much more accurate and efficient thanks to advancements in molding techniques. Fig 1 shows a schematic representation of Injection molding process. Injection molding has found use in a growing number of industries as polymeric material technology has advanced.
necessitates the effective integration of secondary geometric features such as ribs and bosses, which serve to improve mechanical strength, reduce material usage, and facilitate assembly. However, these features often introduce complexities in moldability, manufacturability, and structural performance. As a result, their accurate detection and validation within Computer-Aided Design (CAD) systems is essential during the early stages of product development. This review examines existing literature on the automated recognition and evaluation of ribs and bosses in CAD environments. Emphasis is placed on rule-based algorithms, geometric reasoning, and topology-informed validation techniques. Methods are analyzed based on recognition accuracy, adaptability to irregular geometries, compliance with design for manufacturability (DFM) standards, and effectiveness in handling hybrid or intersecting features.
Injection molding has emerged as a crucial manufacturing process for everything from electronic housings to automotive parts. These days, injection molded parts are essential to many products, such as plastic toys, compact discs, electronic enclosures, medical equipment, automobile interiors, and household goods. The widespread use of injection-molded components highlights how crucial they are to contemporary manufacturing. [2]
In addition, the mathematical and logical underpinnings— such as edge profiling, face adjacency analysis, and draft-angle filtering—are discussed, with specific focus on their limitations when applied to complex geometries. The review addresses often-overlooked edge cases, including features on non-planar surfaces, interconnected bosses and ribs, and variable crosssection profiles. Rather than providing a descriptive survey alone, the study critically evaluates the practical utility of these approaches, weighing trade-offs among computational complexity, scalability, and CAD integration. It concludes with a set of consolidated best practices and identifies future research directions aimed at developing more adaptive and context-aware validation systems for molded plastic part design Key Words: Injection Molding, Plastic Component Design, Feature Recognition, Ribs and Bosses, Design for Manufacturability, CAD Automation, Geometric Validation
Fig -1: Injection molding process
INTRODUCTION
1.Critical Role of Feature Identification in Integrating CAD for Enhanced Component Design
In the plastics processing industry, injection molding technology is a common technique used to produce complexly geometrized products in large quantities. This method is used in many different industries, such as the production of toys for kids, medical devices, automobile
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The process of designing plastic parts is very complex and incorporates many important elements, including material selection, assembly or structural complexity, process
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