John L Jorstad

Title: John L Jorstad: Innovator in Semi-Solid Molding Technology

Introduction

John L Jorstad is a notable inventor based in Richmond, VA (US), recognized for his contributions to the field of semi-solid molding technology. With a total of 6 patents to his name, Jorstad has made significant advancements in the methods and apparatus used in metal alloy processing.

Latest Patents

Among his latest patents, Jorstad has developed a "Semi-solid molding method," which involves heating a metal alloy to a molten state and adding a grain refiner. The molten alloy is then poured into a shallow chamber of a shot sleeve of a vertical die cast press, where it cools to form a semi-solid slurry with a globular, generally non-dendritic microstructure. The method allows for the injection of the slurry into a die cavity, optimizing the cooling process through the use of internal grooves in the shot piston. Another significant patent is the "Semi-solid molding apparatus and method," which outlines a similar process with the addition of a retractable cooling pin to enhance cooling efficiency.

Career Highlights

Throughout his career, Jorstad has worked with prominent companies such as T.H.T. Presses, Inc. and Reynolds Metals Company. His experience in these organizations has contributed to his expertise in metal alloy processing and molding technologies.

Collaborations

Jorstad has collaborated with notable coworkers, including Richard J Kamm and William H Overbagh, who have also contributed to advancements in the field.

Conclusion

John L Jorstad's innovative work in semi-solid molding technology has paved the way for improved methods in metal processing. His patents reflect a deep understanding of material science and engineering, making him a significant figure in the industry.