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Western Plastic Trade Fair
Half
day seminars and supplier exhibitions.
Three must see
seminars for the plastics professional along with exhibits from the best
suppliers to the Southern California plastic community. Tasty German Dinner
along with our famous raffle.
August 14,
2014
Phoenix
Club
Anaheim,
CA
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Seminar 1: 1:15-2:00PM
"Material Selection - 8
Questions To Ask"
Robert P. Frey,
PolyOne
Lead Technical Development Engineer
If
you've ever wondered how to make sure you get the information needed to assist
your customer in selecting the right material for a job, these 8
questions...actually more like 8 subjects to discuss... will likely bring up a
lot more questions, but will also get the discussion started and will likely
make your customer thing more about his application, and what it really needs.
Included are concerns regarding the chemical, thermal, mechanical and
regulatory environment, as well as a few other topics.
Bob
has 40 years of experience in the plastics industry, starting with production
jobs at Dow Chemical, then moving to GE Plastics for 7 years of tech support
work in the NORYL®, XENOY® and VALOX® resin businesses. Bob left GE Plastics
and spent 7 years self-employed as a consultant, focusing mostly on computerized
flow analyses. During those years, he worked with a broad variety of
thermoplastics, both engineering and commodity. In 1993, Bob re-joined the GE
family as the Technical Service Engineer for Polymerland, and stayed with
GEPlastics until shortly after the buyout by Sabic. Finding that working for a
single resin supplier was "too constricting", Bob moved to PolyOne Distribution
in 2008. This position at PolyOne Distribution includes responsibilities for
processing, design, material selection, failure analyses, and education (both
internal and external). Bob has a BSME degree from Case Western Reserve
University, in Cleveland, Ohio. In his current position, Bob has responsibility
to support customers in the 14 western United States as well as western Canada
and the northern portions of Mexico.
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Seminar 2: 2:15-3:00 PM
Shear
happens!
Steven Silvey
Silveys' Plastic Consulting
Within
the injection molding process there are many areas of shear which have an effect
both on the plastics in the form of heat impute, to that which is caused by all
the restricted areas in the machine, nozzle, and mold feed system.
Understanding the areas and the possible effects can lead to an understanding of
what is controllable and easily interchanged from machine to machine as the tool
moves yielding another universal setup point to consider.
Though
short the presentation shall cover:
Screw
RPM vs surface speed
Temperature
raise in nozzles
Shear
and flowability
Gate
design and effect of injection speeds
Steven
L Silvey has many years in the plastic industry with experience in most of the
major processing methods. He spent the first 16 years of his career in the
custom molding, blow molding, compression and ophthalmic molding/casting
businesses with duties ranging from maintenance, set-up/molder, R&D
engineer, Tech Service Manager, to Engineering Manager at various companies. In
addition he also filled in at Laney College, teaching mold design and part
design in the evenings. Steven than worked at General Polymers/ Ashland for 15
years, as their technical services engineer covering the Western region of the
United States, Mexico, and Western Canada. In 2003
Steven started applying his knowledge as consultant as owner of Silveys' Plastic
Consulting. In this capacity he continues to provide solutions and education to
those in the plastic part manufacturing area
.
He
is a graduate of California State University Chico. A Senior Member of SPE,
Certified Instructor for RJG Systematic I training course, Certified Plastic
Technologist and member at large of Epsilon Pi Tau.
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Seminar 3:
3:15-4:00 PM
Optimizing Pack & Hold times
In Hot Runner Molds
Suhas Kulkarni
FIMMTECH
For
cold runner molds, the pack and hold times are optimized by conducting a gate
freeze study (or gate seal study) where the part weight is recorded as a
function of the pack and hold times. When the gate freezes the part weight
remains constant with increasing pack and hold times. A second or so is added to
the lowest value of time where the part weight stays constant and this number is
taken as the total time for the setting of the pack and hold times. However, in
hot runner systems or in valve gated systems the gate area always has molten
plastic and therefore the above method does not produce acceptable results. A
method for optimizing this value in hot runner systems or valve gated systems is
proposed based on the Cosmetic and Dimensional Process Window. Experimental
results will be shown.
Suhas
Kulkarni is the President of FIMMTECH, a consulting firm that specializes in
services related to injection molding. He earned his Masters in Plastics
Engineering from the University of Massachusetts, Lowell and a Bachelors in
Polymer Engineering from the University of Poona, India. He has 22 years of
experience as a process engineer. His main area of expertise is Scientific
Processing for Injection Molding. He conducts regular training seminars in
Injection Molding and has developed a custom software called Nautilus, that aids
the complete process development routine to production release. He is a contract
faculty at UMASS Lowell and has given numerous presentations and written several
articles. He is also an author of the book 'Robust Process Development and
Scientific Molding' published by Hanser Publications in 2010.
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