Design and Analysis of Injection Mold for Plastic Rivet with Buttress Thread Profile: DFM Approach

Abstract

Abstract: Manufacturing is the process of transforming raw materials to useful product. Due to this transformation the finished product used to be costlier than the raw materials. Generally, the entire process is planned to maximize profit. Different attributes help to achieve this goal. The fulfilment of customer needs or use of the product is unalterable, but many other aspects can be adjusted in the focus of ultimate profit. Selection of material, process selection and design of the part are few among such attributes. Injection molding is one of the widely used processes to process polymers, especially thermoplastics to any required shape. This paper aims to make rivets with Polypropylene (PP) using the injection molding process.  The paper proposes a new design for plastic rivets with modified buttress profile. Simultaneously this work checks the suitability of making such rivets by injection molding process. It was found after the software simulation that such new product can be easily molded without any considerable defects. The software implemented in this works are, UG Nx 12.0 for solid modeling of the parts, Autodesk Moldflow Adviser 2019 for flow analysis and UG Nx 12.0 Design simulation for stress analysis.  

 Index Terms: Injection molding, Buttress Threads, Rivet, Polypropylene, Plastic Mold, Tool, Inserts.