Tederic Machinery Molding Dreams Molding Dreams -----TEDERIC injection molding machine introduction.
EXPERIMENTAL DESIGN FOR INJECTION MOLDING · combining decoupled molding with DOE is the ideal...
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MANUFACTURING and confirming results. Chapter 1 gives an overview of these basics and introduces a full factorial experimen- tal design. However, since a full factorial design is probably not the most cost- effective, an alternative is the frac- tional factorial design, explained in Chapter 2. The terms "interaction," "aliasing," and "resolution" are in- troduced here. The authors succinctly explain the concepts underlying these terms. The examples given in Chapter 2 are aimed at a single problem (for ex- ample, sink marks). Many times, though, more than one problem ex- ists with a piece part during molding. EXPERIMENTAL DESIGN FOR INJECTION MOLDING By Jayme Lahey and Robert Launsby J ayme Lahey and Robert Launsby have authored a marvelous book on the subject of design of experi- ments (DOE) for injection molders. Unlike the book Straight Talk on De- signing Experiments, Znd edition, this book is geared to injection molding. The 201-page volume includes an introduction, nine chapters (each with a bibliography), an appendix, an index, and a demo disk for DOE Wis- dom software. The concept of decoupled mold- ing (also called scientific molding) is covered in the introduction. Decou- pled molding involves the use of cor- rectly located pressure sensors and data collection. The authors urge that combining decoupled molding with DOE is the ideal approach to trou- bleshooting. (For more information see October 1997 IMM, p. 118.) Chapter 1 begins with a review of developments in the injection mold- ing industry from the 1970s to the present, and shows how DOE is im- plemented. Even though the molding process has many variables that af- fect part quality, Lahey and Launsby suggest that most molding experi- ments should not include more than four or five. The five steps molders must fol- low to apply DOE are planning, se- lecting a family of tests, conducting the experiment, performing analysis,
Transcript of EXPERIMENTAL DESIGN FOR INJECTION MOLDING · combining decoupled molding with DOE is the ideal...
MANUFACTURING
and confirming results. Chapter 1gives an overview of these basics andintroduces a full factorial experimen-tal design.
However, since a full factorialdesign is probably not the most cost-effective, an alternative is the frac-tional factorial design, explained inChapter 2. The terms "interaction,""aliasing," and "resolution" are in-troduced here. The authors succinctlyexplain the concepts underlyingthese terms.
The examples given in Chapter 2are aimed at a single problem (for ex-ample, sink marks). Many times,though, more than one problem ex-ists with a piece part during molding.
EXPERIMENTAL DESIGNFOR INJECTION MOLDINGBy Jayme Lahey and Robert Launsby
J ayme Lahey and Robert Launsbyhave authored a marvelous book
on the subject of design of experi-ments (DOE) for injection molders.Unlike the book Straight Talk on De-signing Experiments, Znd edition, thisbook is geared to injection molding.
The 201-page volume includes anintroduction, nine chapters (eachwith a bibliography), an appendix, anindex, and a demo disk for DOE Wis-dom software.
The concept of decoupled mold-ing (also called scientific molding) iscovered in the introduction. Decou-pled molding involves the use of cor-rectly located pressure sensors anddata collection. The authors urge that
combining decoupled molding withDOE is the ideal approach to trou-bleshooting. (For more informationsee October 1997 IMM, p. 118.)
Chapter 1 begins with a review ofdevelopments in the injection mold-ing industry from the 1970s to thepresent, and shows how DOE is im-plemented. Even though the moldingprocess has many variables that af-fect part quality, Lahey and Launsbysuggest that most molding experi-ments should not include more thanfour or five.
The five steps molders must fol-low to apply DOE are planning, se-lecting a family of tests, conductingthe experiment, performing analysis,
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