Category Archives: News

Plastic411: A Closer Look at Scientific Molding

 

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By Garrett MacKenzie

Plastic injection processing has experienced massive change in the last 20 years. The days of molding by time and pressure have given way to molding by position, peak pressure and robust  process.  RJG and John Bozzelli  were major pioneers in the development of decoupled and scientific molding as the procedures were developed and given structure. Plastic injection as an “art” gave way to plastics processing as a science of repeatable, standardized processes.

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Five Lean Myths and the Reality of Thinking Lean

The Leadership Network: Jeffery Liker

You can only imagine how exciting it was for industrial engineers and researchers when they were conducting research to understand the strategy and tools behind Toyota’s meteoric growth.

All the studies showed that Toyota was faster, with less costs and inventory, and delivering a higher quality compared to the American and European automakers. And it wasn’t by a small amount; Toyota used a small fraction of the inventory yet built cars on time every day with high quality…..

Click HERE to read this Jeffrey Liker’s article…

The Real Cause of Multi-Cavity Mold Imbalances

by John Beaumont

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A lesson on shear induced melt variations ends some confusion regarding balancing runner systems
for multi-cavity molds.

The Beaumont Effect is recognized as the source of mold filling imbalances and product variations in molds
with four or more cavities. The worst failures caused by the phenomena can be most easily (visually) recognized
in molds with 8 or more cavities. However, shear induced melt variations impact every injection molded
part, with a greater influence than most realize….

Click HERE to read this Beaumont Technologies article

Mike Sepe on Plastics Today: Material validation in the early 21st century plastics industry

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It is curious that in a world that relies increasingly on documentation, the attention to the details of polymer composition receive so little attention. Companies will fill volumes with procedures for various aspects of their manufacturing processes. However, no serious consideration is given to verifying the composition of the raw materials that are used to produce the various molded parts until there is a problem. Instead, there is a tendency simply to refer back to whatever published information is available from the material supplier….

Clickk HERE to read Mike’s article…

Laws of Viscosity in Molding

By Garrett MacKenzie

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Viscosity is a very large category that has huge effects on standardizing molding processes. It is also one of the most important  factors in a molder’s arsenal of making process changes. This article will first explain viscosity, and then delve into different situations where viscosity may help or be hurting  a processors goal of zero scrap and high output…..

 

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Mold Watering/ Heating: Key of Process Control

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By Garrett MacKenzie

When trying to establish process control in plastic injection, watering the tool is a key variable that is often overlooked. Water set-up and design are every bit as important as establishing and recording a repeatable process. The steps taken when watering a mold are key to a processor’s goal of consistency. If during the design and development stage, watering is put on the back burner as an “unimportant” variable, the potential for lost process control is huge. 

Below are some insights into the most important facets of cooling or heating your mold, as well as what recordable data are important in the initial stages of process engineering…

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3 to 7 Minute Color Change

By Garrett MacKenzie: October 18, 2016

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In lean manufacturing, changeover times are a vital component of shop performance. Minimal down time assures that multiple changeovers have little effect on a plant’s available machine time available. After all, less down time in the production equation offers more opportunities to take on more work and increase company profits. This article outlines specific approaches towards color changes that will support the potential of completing color changeovers in 3 to 7 minutes. This may seem like an impossible task to some, but with the proper planning, methods and equipment,  it is an attainable and repeatable goal…..

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