| Seminar Schedule |
|
|
|
| Written by Administrator | |||||||||||||||||||||||||||||||||||||
| Friday, 09 January 2009 | |||||||||||||||||||||||||||||||||||||
|
Upcoming Events for 2010 Custom On-site Seminars Available Upon Request All seminar content is designed to make attendees more knowledgeable and productive
SCIENTIFIC MOLDING HIGH CAVITY RUNNERLESS SYSTEMS. Seminar will focus on ability to successfully process high cavity runnerless systems applying scientific molding methods. When process these high cavity runnerless systems the material characteristics create some unique challenges and anomalies. This seminar will help explain these anomalies and suggest solutions to this complex molding process. Structural integrity of the tool will be discussed with regard to optimizing load carrying requirements of the mold structure. Effective management of thermal expansion for optimum performance and increased tool life will be discussed. The newest gate designs for quick color change, longer hot tip life and better control will be shown.
Materials Structure Molecular chains Newtonian, Non-Newtonian How polymer is made Properties Amorphous vs. crystalline Tooling Design and Structure Modular Design. Interlocking cavities Thermal Expansion Stack Mold Design Processing Temperature Velocity Viscosity Shear Pressure Decompression Injection Profiling Venting Pressure calculations Vent sizes Adiabatic compression demonstration Hot tip gating vs. valve gating
ASSEMBLING, MAINTAINING AND OPERATING HOT RUNNER SYSTEMS Seminar covers the basic requirements for using Hot Runners. This seminar is intended for personnel involved with installing, starting up, and/or maintaining Hot Runner Systems. Topics to be covered include: gate cooling, thermal expansion, hot half rigidity and bolt requirements, valve gate fitting/timing, start-up/shut-down procedures, assembly/disassembly. Explanations on maintaining peak operating conditions. Gating methods will be covered on the basis of system assembly and operation.
Designing hot runner systems Tool construction Cooling circuits Types of steel Thermal Expansion Material Selection Types of material Material leakage How leak can occur How to stop leakage from occurring Start up and Shut down procedures Assembling Hot tip systems Valve gate systems Wiring Checking electrical system Checking thermocouples Preventing short circuits Temperature Controllers Hot they operate Differences between different manufacturers
MULTI-MATERIAL MOLDING Seminar will cover the different types of tooling to produce multi-material parts. This comprehensive presentation will cover tool construction do’s and don’ts. It will cover material selection and resin compatibility.
Design Considerations Materials being processed Types of tooling Material bonding concerns How material bonds Chemical Mechanical Types of applications Medical Consumer Automotive Equipment Required Molding machine Rotatory platen Spin Stack Hot runner systems
BALANCING HIGH CAVITY RUNNERLES SYSTEMS Seminar will cover in depth the 6 primary causes of filling imbalances. Venting uniformity Uniform wall sections Uniform mold temperatures Effects of Shear on melt viscosity Uniform heat profile Hot Runner Design Processing (injection profile & velocities) Analyzing each cause and effect along with presenting solid solutions to each cause. Expect an in depth study of polymer technology and processing techniques specific to high cavity hot tip and valve gate runnerless systems.
What defines high Cavity? What effects balancing Venting Uniform wall sections Uniform mold temperature Effects of shear on melt viscosity Uniform heat profile Hot runner design (naturally balance) Processing (Injection profile and velocities) Hot runner gates Hot Tip Valve gate Edge gate Venting Pressure calculations Vent sizes Adiabatic compression demonstration
SCIENCE OF VENTING Seminar will cover an in depth discussion on how air flows. Venting is a major cause of imbalance filling of multi-cavity injection molds. Typically venting isn’t looked at closely because the perception venting is fine as along as there is no evidence of burning on the part. DO NOT under estimate the effects of back pressure in the cavity due to poor venting. The volume of air in the cavity needs to be displaced by the molten plastic. Like a syringe barrel, the plunger cannot be pushed forward if the end of the needle is too small or pinched off. The size of the needle orifice will determine how fast and how much pressure is required to push the plunger forward. If you have poor venting, it will require more pressure and time to displace the air.
Vent Function Material manufacturers vent size recommendations Volumetric air displacement Adiabatic Process Fire Piston Demonstration Different ways to check for vent uniformity Cavity air pressure calculations Pressure, temperature, volume LAWS The gas composition of air we breathe Calculating cavity air pressure during the filling process Demonstration of venting analysis software program
|
|||||||||||||||||||||||||||||||||||||
| Last Updated ( Tuesday, 04 May 2010 ) | |||||||||||||||||||||||||||||||||||||
