Conjugate transport in polymer melt flow through extrusion dies

1997 ◽  
Vol 37 (9) ◽  
pp. 1582-1595 ◽  
Author(s):  
P. Lin ◽  
Y. Jaluria
Keyword(s):  
Polymer Melt ◽  
Melt Flow ◽  
Extrusion Dies ◽  
Flow Through

Polymer Melt Flow through Channels with Vibrating Walls

2002 ◽  
Vol 230-232 ◽  
pp. 300-302 ◽  
Author(s):  
M. Martins ◽  
José A. Covas
Keyword(s):  
Polymer Melt ◽  
Melt Flow ◽  
Flow Through

A comprehensive 3-D analysis of polymer melt flow in slit extrusion dies

2004 ◽  
Vol 23 (2) ◽  
pp. 111-124 ◽  
Author(s):  
Yihan Huang ◽  
C. Richard Gentle ◽  
J. Barry Hull
Keyword(s):  
Polymer Melt ◽  
Melt Flow ◽  
Extrusion Dies

Experimental and analytical study of the polymer melt flow through the hot-end in material extrusion additive manufacturing

2020 ◽  
Vol 32 ◽  
pp. 100997 ◽  
Author(s):  
Marcin P. Serdeczny ◽  
Raphaël Comminal ◽  
David B. Pedersen ◽  
Jon Spangenberg
Keyword(s):  
Additive Manufacturing ◽  
Analytical Study ◽  
Polymer Melt ◽  
Melt Flow ◽  
Material Extrusion ◽  
Flow Through

Polymer melt flow through nanochannels: from theory and fabrication to application

RSC Advances ◽  
2015 ◽  
Vol 5 (10) ◽  
pp. 7160-7172 ◽  
Author(s):  
Sarmad Ali ◽  
Wei Tian ◽  
Nisar Ali ◽  
Lingxiao Shi ◽  
Jie Kong ◽  
...  
Keyword(s):  
Polymer Melts ◽  
Polymer Melt ◽  
Short Review ◽  
Melt Flow ◽  
Flow Through

This short review presents the theory, fabrication, and application of polymer melts through nanochannels.

Numerical Simulation of Polymer Melt Flow Control for a Multi-Cavity Mold During Injection Molding Processes

2003 ◽  
Author(s):  
Ahmet Pinarbasi ◽  
Gregory S. Layser ◽  
John P. Coulter
Keyword(s):  
Numerical Simulation ◽  
Injection Molding ◽  
Flow Control ◽  
Polymer Melt ◽  
Volumetric Flow Rate ◽  
Melt Flow ◽  
Valve System ◽  
Control Concept ◽  
Flow Through ◽  
Plastic Parts

Process control is an important factor for improving the performance and consistency of thermoplastic parts manufactured by injection molding processes. A critical process parameter for manufacturing of high quality plastic parts is cavity pressure. This paper presents direct numerical simulation results of a new manufacturing concept developed to improve injection molding processing for all runner types by monitoring shot to shot product quality and controlling the filling of multi-cavity molds in real time. A cold runner system supplying polymer melt to a two-cavity mold incorporating mechanical valves in the runner systems was modeled. Each valve was controlled independently to meter flow and pressure to its portion of the mold. Simulations were performed for two different materials: PPS Ryton R-4-200 and LCP Vectra E130D-2. Shear-rate dependence of viscosity of the materials is modeled through the Cross rheological equation. Flow rates and maximum shear-rates through valves were calculated and the results of the simulations were analyzed to validate the concept of individual cavity filling modification. Flow through one valve system leading to a single cavity was simulated first, followed by flow through two-valve system for filling two cavities. For one valve simulations, pressure at the inlet was specified, whereas for flow through two-valve system, volumetric flow rate at the inlet was supplied for simulations. It was concluded that the flow control concept developed was numerically validated, and it was shown that the valve system proposed here is applicable to control melt flow through cavities at industrial manufacturing facilities. The future directions for the continuing project are also discussed.

POLYMER MELT FLOW IN ASYMMETRIC SUDDEN EXPANSIONS: A NUMERICAL STUDY

2016 ◽  
Author(s):  
Felipe Oliveira Basso ◽  
Paulo Zdanski ◽  
Diego Beppler ◽  
Miguel Vaz Jr.
Keyword(s):  
Numerical Study ◽  
Polymer Melt ◽  
Melt Flow
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