Duhduh A. – TechConnect Briefs

The Influence of Different Concentrations of Orotic Acid on the Poly- Lactic Acid Crystallinity Development During Vibration Assisted Injection Molding

Alzahrani F.J., Gao P., Duhduh A., Coulter J.P., Lehigh University, US

This research investigated the effect of the addition of different concentrations of Orotic Acid (OA) on the crystallization kinetics of Poly-lactic Acid (PLA) in non-quiescent conditions. DSC technique was utilized to capture the crystallinity, melting [...]

Experimental and Analytical Analysis for Advanced Hot Runner Based Injection Molding

Alqosaibi K., Thakur C., Noor H., Almalki A., Duhduh A., Coulter J.P., Lehigh University, US

A novel technology “Rheodrop” was developed to advance the process of hot runner based injection molding. The technology applies controllable shear rate to the polymer melt during and between injection molding cycles. The application method [...]

Vibration Assisted Injection Molding: An Innovative Energy Efficient Processing Technique for Poly-Lactic Acid (PLA) with Enhanced Properties

Gao P., Duhduh A., Xing J., Kundu A., Coulter J.P., Lehigh University, US

This work is focused on the development of time and energy efficient injection molding processing strategies to fabricate semi-crystalline plastic components with enhanced properties. A Vibration Assisted Injection Molding (VAIM) process was devised for this [...]

Vibration Assisted Injection Molding for PLA with Enhanced Mechanical Properties and Reduced Cycle Time

Duhduh A., Kundu A., Coulter J., Lehigh University, US

Vibration assisted molding (VAIM) is a process in which vibrational movement is introduced to the injection screw during the injection stage of molding processes. This research was focused on the effect of processing parameters on [...]

Shear Induced Crystallization through Altering Flow Area of Polymer Melt in Additive Manufacturing

Noor H., Alqosaibi K., Duhduh A., Kundu A., Coulter J., Lehigh University, US

Additive manufacturing is a new paradigm of fabricating products. The ability to build near-net shapes by depositing layer by layer in additive manufacturing have provided a time and energy efficient processing strategy whose full potential [...]

Investigation of a Hybrid Hot Runner System to Increase the Efficiency of Injection Molding and Improve the Quality of Molded Parts

Alqosaibi K., Thakur C., Duhduh A., Kundu A., Coulter J.P., Lehigh University, US

Hot runner systems are prevalent in the manufacturing of thin walled polymers parts. There are great challenges in industries associated with the quality of the molded parts when utilizing a hot runner system. One of [...]

The impact of the “4d-Rheoprinting” additive manufacturing technique on molecular orientation and thermal properties of polymeric parts

Duhduh A., Coulter J.P., Lehigh University, US

This paper discusses a novel additive manufacturing technique that was developed in order to 3D print polymeric parts with tunable properties. This technique, known as 4D-Rheoprinting, can be applied to a number of common additive [...]

Additive “4D” Rheoprinting for the Manufacture of Enhanced Biomaterial Products

Duhduh A., Jaafar I.H., Coulter J.P., Lehigh University, US

A novel additive manufacturing technique, which we have coined as the “4D Rheoprinter”, has been developed. This technique enables 3D printing of polymers with tunable material properties for optimized performance in wide range of applications. [...]