Franklin

Fundamentals of plastics thermoforming [electronic resource] / Peter W. Klein.

Author/Creator:
Klein, Peter W.
Publication:
[San Rafael, Calif.] : Morgan & Claypool Publishers, c2009.
Format/Description:
Book
xiii, 83 p. : ill., digital, PDF file
Series:
Synthesis lectures on materials engineering (Online) ; #1.
Synthesis lectures on materials engineeering ; #1
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Details

Subjects:
Thermoforming.
System Details:
System requirements: PDF reader.
Mode of access: World Wide Web.
Summary:
The process of heating and reshaping plastics sheet and film materials has been in use since the beginning of the plastics industry. This process is known as thermoforming. Today this process is used for industrial products including signage, housings, and hot tubs. It also produces much of the packaging in use today including blister packs, egg cartons, and food storage containers. This process has many advantages over other methods of producing these products, but also it has some limitations. This book has a twofold purpose. It is designed to be used a text book for a course on thermoforming. It is also intended to be an application guide for professionals in the field of thermoforming including manufacturing, process and quality engineers and managers. This book is focused on process application rather than theory. It refers to real products and processes with the intent of understanding the real issues faced in this industry. In addition to materials and processes, part and tool design are covered. Quality control is critical to any operation and this is also covered in this text. Two areas of focus in today's industry include Lean operations and environmental issues. Both of these topics are also included.
Contents:
Introduction
Introduction to thermoforming
Common thermoformed products
Why use thermoforming
Advantages of thermoforming
Limitations/disadvantages of thermoforming
Plastic memory
Plastics materials
Introduction
Molecular structure
Morphology
Van der Waals' forces
Discovering Van der Waals' forces
Most used materials
Polystyrene (PS)
Acrylonitrile butadiene styrene (ABS)
Polyvinyl chloride (PVC)
Polymethyl methacrylate (PMMA or acrylic)
High density polyethylene (HDPE)
Low density polyethylene (LDPE)
Polypropylene (PP)
Cellulosics
Polyethylene terephthalate (PET)
Green plastics
Important terminology
Heat deflection temperature (HDT)
Glass transition temperature (TG)
Melt temperature (TM)
Polymer set temperature
Homopolymer
Thermoforming window
Thermoforming process overview
The thermoforming process
Sheet preparation
Drying
Loading
Heating
Forming
Cooling
Unloading
Trimming
The forming process
Forming introduction
Mechanical forming
Vacuum forming
Pressure forming
Combination forming processes
Drape forming
Pneumatic preforming
Mechanical preforming
Twin sheet thermoforming
Laminating thermoforming
Part design
Design questions
Wall thickness variation
Plug versus cavity
Draw ratios
Aerial draw ratio (ADR)
Linear draw ratio (LDR)
Height-to-dimension ratio
Material selection
Part geometry
Corners and radii
Draft angles
Depth of draw
Webbing
Undercuts or negative draft
Part application issues
Useful temperature range
Strength requirements
Stiffness
Quality requirements
Cosmetics
Optics
Dimensional tolerances
Mold/tool design
Purpose of the mold or tool
Mold materials
Mold geometry/shrinkage
Venting
Temperature control
Cavities
Quality control issues
Introduction
Material source
Regrind
Sheet orientation
Orientation test
Moisture
Cosmetics
Process quality
Machine set-up
Variation
Tool quality
Facility quality
Quality inspection
Quality tools
Lean operations
Introduction
Eliminating waste
6S
Process flow chart
Process mapping
Visual controls
Set-up reduction
Poka yoke
Environmental issues
Introduction
Source reduction
Recycling
Material selection
Green plastics.
Notes:
Title from PDF t.p. (viewed Apr. 29, 2009).
Includes bibliographical references (p. 81-82).
ISBN:
9781598298857 (ebook)
1598298852 (ebook)
9781598298840 (pbk.)
OCLC:
319633388
Publisher Number:
10.2200/S00184ED1V01Y200904MRE001 doi
Access Restriction:
Restricted for use by site license.