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Title: Spc Statistical Process Control in Injection Molding and Extrusion: Statistical Process Control in Injection Molding and Extrusion by Chris Rauwendaal ISBN: 1-56990-285-2 Publisher: Hanser Gardner Publications Pub. Date: 01 June, 2000 Format: Hardcover Volumes: 1 List Price(USD): $79.95 |
Average Customer Rating: 4 (2 reviews)
Rating: 3
Summary: Process Control and SPC
Comment: In preface of the book the author states that people who does not know about process controls teach most SPC courses. I say Amen! And also it should be added that it is difficult to contain SPC and Process knowledge of an important process like extrusion together in 230 pages and most. If you are new to extrusion there is enough basic information in the first half of the book. If you are already in Process Controls don't waste your time reading. Page 130 starts with basic statistical information; definitions, control charts, then Process capability and some basic DOE and nothing about modern techniques. Even though the title of book explains SPC as Statistical Process Control, there are not much about control theories and practical controls applications. After reading this book I would say SPC is for Statistical Process Charting. There are some formulas and references to SPC software packages with no value.
My order of learning recommendation is Controls Engineering and Instrumentation, extrusion (or the process in question) from a dedicated book and experienced practitioners, then learn SPC knowledge from another dedicated statistics book such as "The Power of Statistical Thinking improving Industrial Processes".
Rating: 5
Summary: Great Book on SPC for Extrusion and Injection Molding
Comment: I am a grateful reader who used Dr. Rauwendaal's first book on SPC to solve real world extrusion problems. His second book, SPC in Injection Molding and Extrusion is even better and covers injection molding too. In a nutshell, this book gives the interested reader, technical or not, management or in the trenches, everything he or she needs to successfully understand and apply SPC in extrusion and injection molding manufacturing operations. That's a big statement, but I can back it up with this story.
I design extruded and injection molded plastic parts for clients for a living. I also design specialty down-stream equipment for extrusion lines and occasionally solve production problems.
Recently I had a serious yield problem with an extruded product I had designed. I had mounds of data, but with no background in either statistics or statistical process control. I was unable to successfully organize or make sense of the data.
I consulted Dr. Rauwendaal's book. I was skeptical that a skinny little book like this could help me solve my problem or make me an instant expert on SPC. I was wrong on both counts. What makes this book so powerful is that the author has a strong academic and theoretical background and is an expert in processes. But, he's also been in the trenches and gotten his hands dirty. He has written in simple down-to-earth prose that is immediately useful.
You can't use SPC unless you know something about the process technology. Rather than leap right into the statistics, the author gives the reader a primer in process technology, starting with the main components of the injection or molding machine. From there he leads us through each of the steps the plastic goes through on its way to becoming a finished product.
Along the way he gives us a background on the properties of the most common plastics and how they perform. He also talks about the principals of good die and mold designs.
An especially useful chapter for me was on data collection and problem solving. The author presents simple yet powerful ways to analyze a problem and organize your data, which is the first step toward its solution. There is a chapter on how to set up experiments to analyze problems. The book also has an excellent subject index and a great glossary. Over 50 references are cited for those who want more information though I doubt that many readers will need them. A list of commercially available statistical software packages is also included.
Here's the rest of the story. With nothing more than Dr. Rauwendaal's book, I was able to organize and analyze the data I had gathered. I devised new experiments to help me pinpoint my problems. I wrote a simple SPC program that I could run in real time to collect and analyze data using Excel spreadsheet functions on my laptop computer. The net result was that I was able to identify problems and make changes in my process. I reduced my yield loss from more than 5% to a fraction of a percent while increasing production speed by over 20%.
Before I read this book, I could calculate standard deviation, mean and the average for a collection of numbers, but that was about it. Now I have a good working knowledge of SPC and know how to apply it to improve products I design and to increase production and yield at the same time. Everything I needed to know was in Dr. Rauwendaal's book.
I'm waiting for Dr. Rauwendaal to write a book on how to fix your own computer.
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Title: Understanding Extrusion (Hanser Understanding Books) by Chris Rauwendaal ISBN: 156990233X Publisher: Hanser Gardner Publications Pub. Date: 01 October, 1998 List Price(USD): $39.95 |
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Title: Troubleshooting the Extrusion Process: A Systematic Approach to Solving Plastic Extrusion Problems by Chris Rauwendaal, Maria Del Pilar Noriega E. ISBN: 1569903204 Publisher: Hanser Gardner Publications Pub. Date: 01 October, 2001 List Price(USD): $89.95 |
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Title: Polymer Extrusion, 4th Edition by Chris Rauwendaal ISBN: 1569903212 Publisher: Hanser Gardner Publications Pub. Date: 01 October, 2001 List Price(USD): $99.95 |
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Title: Successful Injection Molding: Process, Design, and Simulation by John P. Beaumont, R. Nagel, R. Sherman ISBN: 1569902917 Publisher: Hanser Gardner Publications Pub. Date: 15 July, 2002 List Price(USD): $129.95 |
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