In continuous casting of steel, the interfacial gap between the mold and the solidifying shell controls heat transfer in the process and is responsible for lubrication and the prevention of cracks and other defects. Mold slag forms when mold powder added to the top surface of the steel melts, and is the best current practice to perform these important functions. The properties and behavior of t...

This report describes a CAD approach for automated ejectability analysis and parting surface generation for mold tool design. This design automation is incorporated into a Rapid Tool Manufacturing system which integrates stereolithography (SLA) and thermal spraying into a CAD/CAM environment for manufacturing tooling like injection molds. Design models are first evaluated for part ejectability ...

The design of injection molding systems for plastic parts relies heavily on experience and intuition. Recently, mold makers have been compelled to shorten lead times, reduce costs and improve process performance due to global competition. This paper presents a framework, based on a Multidisciplinary Design Optimization (MDO) methodology, which tackles the design of an injection mold by integrat...

Improved design process consists of four steps. These steps are prototype step, design step, analysis step and mold step, respectively. The error constitution of these steps is analyzed. Through the error analysis on both improved design process and reverse process, the total error of reverse improved design is essentially formed by reverse error, design error, analysis error and mold error. Fo...

Injection mold development lead time has been reduced presently by over 50% by employing rapid prototyping based tooling methods. Rapid tooling methods however, have certain limitations in terms of mold material, accuracy, surface finish, and mold life. The relevant process knowledge, especially for newer routes, is not very well established, resulting inconsistent or inappropriate rapid toolin...

Injection mold development lead time has been reduced presently by over 50% by employing rapid prototyping based tooling methods. Rapid tooling methods however, have certain limitations in terms of mold material, accuracy, surface finish, and mold life. The relevant process knowledge, especially for newer routes, is not very well established, resulting inconsistent or inappropriate rapid toolin...

This book is authored by a group of individuals who have published several important papers in the area of injection mold design and are quite knowledgeable in the field. They belong to a select group of academicians who have successfully commercialized the software developed in their laboratory. Overall, I found this book to be easy to read and full of useful information. This book should be a...

Recent developments in Computer Aided Design (CAD) have drastically reduced overall design cycle time and cost. In this paper, wirePATH, a new method for rapid direct tooling, is presented. By using specialized interactive segmentation computer software and wire electrical discharge machining (wire EDM), wirePATH can reduce manufacturing time and cost for injection molds, casting patterns, and ...

The article discusses the application of selected methods for analyzing value in the macroergonomic design of manufacturing systems for developing optimal working conditions for humans and optimal ways to utilize technical machinery and equipment. The selected value analysis method was used to assess the value of factors contributing to the occurrence of hazards at the workstations used by scre...

We study optimal contest design in situations where the designer can reward high performance agents with positive prizes and punish low performance agents with negative prizes. We link the optimal prize structure to the curvature of distribution of abilities in the population. In particular, we identify conditions under which, even if punishment is costly, punishing the bottom is more effective...