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1 students
Viscosity Curve (inmould viscosity)
Setting the maximum injection speed with the help oft he relative viscosity curve
Created byDieter Keller
Last updated 10/2021
English
What you'll learn
- The history of the relative viscosity curve with an example of the difficulties of data collection in the past.
- Influence of shear on the plastic melt in MFI/MFR testing and shear rate curves used in mould flow analysis.
- The importance of the filling time for the injection moulding process and how to determine the ideal filling time.
- Indications of additional benefits of relative viscosity curves for machine maintenance and tool optimisation.
Explore related topics
Course content
7 sections • 7 lectures • 1h 59m total length
Requirements
- No prerequisites. Interest in injection moulding of thermoplastics.
Description
This lecture is for beginners and experts who are interested in plastics process technology injection moulding and need to optimise processes.
Practice informs practice Module 01
Viscosity Curve (inmould viscosity)
Introduction and Chapter 01 (public) Length 24 min 18 sec
- The history of the relative viscosity curve
- An example of the difficulties of collecting data to create a viscosity curve in the past.
- The learning objectives of this module "Setting the maximum injection speed using the relative viscosity curve".
- What we can detect and influence in the injection phase.
- And methods of filling time determination
Chapter 02 - Length 24 min 24 sec
Topic Shear
- the influence of shear during melting
- the MFI or MFR
The apparent shear rate
Chapter 03 - length 22 min 12 sec
- The filling time
- The shear rate
- The creation of a Relative Viscosity Curve.
Chapter 04 -Length 11 min 51 sec
- The ideal relative viscosity curve
- Reference to tool optimisations and machine maintenance data (recognisable from the Relative Viscosity Curves.
Chapter 05 - Length 28 min 10 sec
- Relative viscosity curves created in practice with explanation and evaluation.
On one of the curves the possible tool optimisations and which maintenance data we can generate with the curves.
Chapter 06 - Length 07 min 52 sec
- Summary
- In the end credits we talk about our technical injection moulding technique.
Chapter 07 - length 00 min 37 sec
Questions and answers is empty in the basic version
Total time 120 MInutes
Who this course is for:
- Employees, operators, setters, foremen, technical experts and commercial staff of a plastic injection moulding company.
- From beginners to injection moulding experts