Plastics Workshops and Seminars
Practical Rheology for Injection Molding
Instructors: David Rose and David Hoffman
WHO SHOULD ATTEND:
Part Designers, Mold Designers, Process Technicians, Quality Managers should consider attending this seminar. Engineering and training managers can also benefit from a better appreciation of the characteristics of plastic flow and the influence part design and mold design has on the molded part quality and manufacturing efficiencies.
EDUCATIONAL GOALS:
This one-day seminar takes the complex study of plastic flow behaviors and reduces it to practical knowledge as it relates to part quality and process stability. The seminar takes a logical path starting with the basics of polymer flow and then proceeds into the effects of process conditions on the melts rheology and how those variables affect the part quality in both single and multi-cavity molds. The affects of pressure, temperature, viscosity, molecular and filler orientation, and linear and volumetric shrinkage, will be discussed in detail. In addition, practical approaches will be taught for comparing melt viscosities, and for diagnosing filling imbalances within injection molds. Real world sample parts will be used and play an important role in demonstrating the fundamentals taught in this seminar.
SEMINAR OUTLINE:
I. Types of Polymers
- Theroplastic resins Vs.Thermosetting resins
- Amorphous Vs. Semi-Crystalline
II. Flow Characteristics and Variables within a Single Cavity
- Viscosity
- Laminar Flow and Non Newtonian Behavior
- Shrinkage: Volumetric and Orientation Induced
- Hesitation
- Managing Rheological Conditions within a Cavity
III. Flow Characteristics and Variables within Multi-Cavity Molds
- Rheology within Melt Delivery Systems
- Effects on pressure, temperature, and viscosity
- 5 Step Process, Mold Balance Analysis Methodology
- Managing Rheolgoy within the Runner System
IV. Summary / Overview
*Each participant will receive a copy of the 361 page hardcover book: "Successful Injection Molding" - a $129.95 value.