Date of download: 9/18/2016 Copyright © ASME. All rights reserved. From: Real-Time Acoustic and Pressure Characterization of Two-Phase Flow for Quality Control of Expanded Polystyrene Injection Molding Processes J. Manuf. Sci. Eng. 2015;138(5): doi: / Pneumatic schematic of fill gun test system: (a) fill gun connected to dual air supplies, including separate vacuum drive and fill gun tip control systems and (b) section view of Nymphius JS8/200 G fill gun Figure Legend:

Date of download: 9/18/2016 Copyright © ASME. All rights reserved. From: Real-Time Acoustic and Pressure Characterization of Two-Phase Flow for Quality Control of Expanded Polystyrene Injection Molding Processes J. Manuf. Sci. Eng. 2015;138(5): doi: / Schematic of the experimental setup showing a (a) complete EPS bead flow path from vented hopper, through test section, through injection fill gun, to half-transparent mold tooling, (b) isometric view of the test section, and (c) photograph of the half-transparent mold tooling (injection fill gun can be seen in top right corner) Figure Legend:

Date of download: 9/18/2016 Copyright © ASME. All rights reserved. From: Real-Time Acoustic and Pressure Characterization of Two-Phase Flow for Quality Control of Expanded Polystyrene Injection Molding Processes J. Manuf. Sci. Eng. 2015;138(5): doi: / Dimensional parameters and nomenclature of acoustic portion of test section Figure Legend:

Date of download: 9/18/2016 Copyright © ASME. All rights reserved. From: Real-Time Acoustic and Pressure Characterization of Two-Phase Flow for Quality Control of Expanded Polystyrene Injection Molding Processes J. Manuf. Sci. Eng. 2015;138(5): doi: / Electrical and data acquisition schematic of the experimental setup Figure Legend:

Date of download: 9/18/2016 Copyright © ASME. All rights reserved. From: Real-Time Acoustic and Pressure Characterization of Two-Phase Flow for Quality Control of Expanded Polystyrene Injection Molding Processes J. Manuf. Sci. Eng. 2015;138(5): doi: / High-speed videography and image analysis employed to verify bead velocities and flow rates: (a) screen capture from high-speed video system, depicting two-phase flow just beginning to traverse the transparent test section tube but not yet reaching the mold cavity and (b) view of grid overlay on filled mold image for the purposes of surface bead counting Figure Legend:

Date of download: 9/18/2016 Copyright © ASME. All rights reserved. From: Real-Time Acoustic and Pressure Characterization of Two-Phase Flow for Quality Control of Expanded Polystyrene Injection Molding Processes J. Manuf. Sci. Eng. 2015;138(5): doi: / EPS fill gun characterization: inline test section pressure (vacuum) versus applied fill gun drive pressure (positive) Figure Legend:

Date of download: 9/18/2016 Copyright © ASME. All rights reserved. From: Real-Time Acoustic and Pressure Characterization of Two-Phase Flow for Quality Control of Expanded Polystyrene Injection Molding Processes J. Manuf. Sci. Eng. 2015;138(5): doi: / Parameter profiles during mold fills driven at various pressures: (a) EPS-air vacuum pressure profiles at three distinct drive pressures and (b) test section acoustic phase angle (between microphones) profiles at three distinct drive pressures Figure Legend:

Date of download: 9/18/2016 Copyright © ASME. All rights reserved. From: Real-Time Acoustic and Pressure Characterization of Two-Phase Flow for Quality Control of Expanded Polystyrene Injection Molding Processes J. Manuf. Sci. Eng. 2015;138(5): doi: / Vacuum pressure correlations during 552 kPa (80 psi) driven mold fill: (a) correlation between flow velocity and EPS-air vacuum pressure and (b) correlation between bead flow rate (beads/s) and EPS-air vacuum pressure Figure Legend:

Date of download: 9/18/2016 Copyright © ASME. All rights reserved. From: Real-Time Acoustic and Pressure Characterization of Two-Phase Flow for Quality Control of Expanded Polystyrene Injection Molding Processes J. Manuf. Sci. Eng. 2015;138(5): doi: / Acoustic phase angle (between microphones) correlations during 552 kPa (80 psi) driven mold fill: (a) correlation between acoustic phase angle and velocity and (b) correlation acoustic phase angle and bead flow rate (beads/s) Figure Legend:

Date of download: 9/18/2016 Copyright © ASME. All rights reserved. From: Real-Time Acoustic and Pressure Characterization of Two-Phase Flow for Quality Control of Expanded Polystyrene Injection Molding Processes J. Manuf. Sci. Eng. 2015;138(5): doi: / Complete time-domain characterization of a single mold fill, with fill gun driven at 552 kPa (80 psi): (a) EPS-air vacuum pressure versus time, (b) EPS-air flow velocity versus time, (c) EPS bead flow rate versus time, (d) test section acoustic amplitude ratio (microphone 1/microphone 2) versus time, and (e) test section acoustic phase angle (between microphones) versus time Figure Legend: