Type

Journal Article

Authors

M. D. Gilchrist
Nan Zhang

Subjects

Engineering

Topics
micro injection moulding pressure sensors rheology behavior pebax non isothermal process slit die process monitoring

Characterization of thermo-rheological behavior of polymer melts during the micro injection moulding process (2012)

Abstract In-line process monitoring and rheological characterization can help to understand the behaviour of polymer melt flows during manufacture and to make injection moulding a measurable process for manufacturing high quality parts. This work developed an in-line rheology measurement system using a slit die attached to a micro injection moulding machine. A series of dumbbell mould inserts was used to form the slit die with thickness ranging from 600 μm to 200 μm. Two combined pressure and temperature sensors were embedded into the slit die to measure the pressure drop. Based on the slit flow model, it was found that the viscosity of Pebax melts depends on the slit thickness in the actual injection moulding process. The competing effects of wall slip and non-isothermal conditions will determine the melt viscosity. The plastication induced thermo-mechanical history can also influence polymer viscosity, although it is neglected in conventional rheology measurements.
Collections Ireland -> University College Dublin -> Mechanical & Materials Engineering Research Collection
Ireland -> University College Dublin -> College of Engineering & Architecture
Ireland -> University College Dublin -> School of Mechanical and Materials Engineering

Full list of authors on original publication

M. D. Gilchrist, Nan Zhang

Experts in our system

1
M. D. Gilchrist
University College Dublin
Total Publications: 172
 
2
Nan Zhang
University College Dublin
Total Publications: 19