Search Results - christopher+williams

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Unlocking True 3D Printing Potential
THE CHALLENGE 3D printing has transformed industries by enabling the use of Additive Manufacturing (AM) techniques. Unfortunately, most 3D printing is done by sequentially printing two dimensional layers; this means that classic 3D printers are unable to fabricate parts with complex load paths. The weaknesses introduced at layer interfaces significantly...
Published: 4/26/2021   |   Inventor(s): Joseph Kubalak, Christopher Williams
Category(s): Engineering, Computer Software, Materials
Process of Continuous Fiber Reinforcement in Castings Manufactured by Using Additively Manufactured/3D Printed Molds
A process to strengthen and tune castings manufactured by 3D printed molds for load bearing applications through incorporation of long continuous fibers. The resulting parts show significant increase in bending strength with minimal mass increase.
Published: 5/31/2017   |   Inventor(s): Christopher Williams, Nikhil Sudhindrarao Jorapur, Alan Druschitz
Category(s): Process/Procedures, Engineering
Multi-Tool Additive Manufacturing Machine
This novel AM machine utilizes multiple additive manufacturing technologies in a single system in order to make multi-material parts in individual layers of a single print. It is also useful to rapidly explore different materials and material combinations across different additive technologies. It is capable of 3D printing metals, ceramics, polymers,...
Published: 5/24/2017   |   Inventor(s): Grady Wagner, Christopher Williams, Daniel Rau, Scott Ziv, Lindsey Bass, Mitchell Wolf, David Wolf
Category(s): Devices, Engineering, Consumer Products, Transportation
Lightweight Composite Cellular Cast Structures
This manufacturing process, which combines 3D Printing and metal casting, is capable of producing lightweight metal-ceramic composite cellular structures. The resultant composite structures feature a complex cellular shape that can be structurally optimized to efficiently distribute the applied loads, while significantly reducing weight. In addition,...
Published: 5/10/2017   |   Inventor(s): Alan Druschitz, Christopher Williams, Dean Snelling
Category(s): Process/Procedures, Engineering
Large Area - High Resolution Additive Manufacturing of Thin Patterned Membranes with Varying Thickness Using a Continuous, Recoat-less Vat Photopolymerization Technique
A fast, low cost manufacturing process/machine for large scale additive manufacturing of thin films and complex contours for abrasive/adhesion linings and semi-permeable membranes .
Published: 3/31/2017   |   Inventor(s): Viswanath Meenakshisundaram, Christopher Williams
Category(s): Chemicals
Apparatus for High Temperature Stereolithography
Stereolithography (SLA) has traditionally been limited to low viscosity resins that flow easily at room temperature. These constraints greatly limit the molecular weights and polymeric classes of the oligomeric components that can be used. Many of the strongest and highest glass-transition temperature (Tg) engineering polymers fall into this category...
Published: 1/31/2017   |   Inventor(s): Nicholas Chartrain, Viswanath Meenakshisundaram, Christopher Williams
Category(s): Engineering, Computer Hardware, Materials
Binderless Jetting -- Using Nanoparticles to Replace Polymer Binders in Binder Jetting of Metal
In Binder Jetting of metals, polymer binding is selectively jetted onto a powder bed of metal to form a green part. Following printing, the green part undergoes a sintering post-process wherein the polymeric binder is pyrolized and the metallic particles sinter together. The use of polymer binders limits the printing process as they (i) burn off before...
Published: 9/26/2016   |   Inventor(s): Yun Bai, Christopher Williams
Category(s): Chemicals
3D Printing All-Aromatic, High Performance Polyimides and Polybenzoxazoles Using Stereolithography (SLA): Processing the Unprocessable
All-aromatic polymers such as polyimides represent a class of polymers with exceptional thermal and thermo-mechanical properties. The semi-crystalline, rigid-rod, all-aromatic high-performance polyimide based on pyromellitic dianhydride (PMDA) and 4,4'-oxydianiline (ODA) (commonly known as Kapton) is thermally stable up to 500C and has a Tg at ~400C....
Published: 8/10/2016   |   Inventor(s): Maruti Hegde, Timothy Long, Viswanath Meenakshisundaram, Christopher Williams, Nicholas Chartrain
Category(s): Chemicals
3-D Printing Vending Machine
The Dream Vendor is a 3D printing station that enables users to quickly fabricate prototypes for their academic, and even personal, design products. The unique "vending-machine" configuration allows students and the public to 3D print their designs without the need for a specialized operator or significant real-estate.The vending machine is...
Published: 4/11/2016   |   Inventor(s): Christopher Williams, Amelia Elliott, David Mccarthy, Nicholas Meisel
Category(s): Devices, Engineering, Process/Procedures
Method and Apparatus for Measuring Static Friction at High Speeds
The grip of gloves used to catch balls in a sports related setting is evaluated using the static coefficient of friction between the glove and ball material. The current test standard starts with the materials in contact and then determines how much force is required to separate them. However, the results are not always indicative of how the gloves...
Published: 5/26/2015   |   Inventor(s): Mark Cockerill, Kevin Dewillie, Matthew Domaratzky, Madeline Scholl, Keith Szkodny, George Uehling, Logan Sturm, Christopher Williams, David Dillard
Category(s): Devices, Engineering, Materials