Handbook of molded part shrinkage and warpage
The handbook explains in plain terms why moldings shrink and warp, shows how additives and reinforcements change the picture, sets out the effect of molding process conditions, and tells why you never can have a single ""correct"" shrinkage value. But that's not all. The han...
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| Main Author | |
|---|---|
| Format | Electronic eBook |
| Language | English |
| Published |
Norwich, NY :
Plastics Design Library/William Andrew Pub.,
©2003.
|
| Series | PDL handbook series.
|
| Subjects | |
| Online Access | Full text |
| ISBN | 1884207723 9781884207723 9780815517573 0815517572 1591245923 9781591245926 1282002732 9781282002739 |
| Physical Description | 1 online resource (xi, 252 pages) : illustrations. |
Cover
Table of Contents:
- Pressure-Volume-Temperature (PVT) Behavior
- Recrystallization and Stress Relief
- Mold Shrinkage (<24 hours)
- Post Mold Shrinkage (>24 hours)
- Material
- Crystalline vs. Amorphous
- Anisotropic Behavior
- Effect of Fillers
- Effect of Pigments
- Moisture Absorption
- Low Warp Materials
- Part Design
- Geometry & Thickness
- Sink Marks
- Mold Design
- Gate Design and Location
- Runner and Mold Cooling Design
- Part Ejection
- Processing
- Mold and Injection Temperature
- Holding Pressure and Time
- Injection Speed and Pressure
- Molded In Stress
- Annealing/Stress Relieving
- Post Mold Fixturing
- Factors Affecting Post Mold Shrinkage
- Pitfalls to Avoid
- Gas Assist and Multi Component Molding Options
- Computerized Shrinkage and Warpage Analysis
- How Does It Work?
- Does It Work?
- How Much Does It Cost?
- How and When to Use It
- Shrinkage and Warpage in Specific Applications
- Material Specific Data Collection of Hundreds of Graphs and Tables
- Shrinkage versus:
- Wall Thickness and Part Geometry
- Mold and Injection Temperatures
- Holding and Injection Pressures
- Time at Various Temperature and Humidities
- Filler Content
- PVT Curves
- Shrinkage Comparison for Thousands of Grades
- Discussions on Mold Shrinkage, Post Mold Shrinkage and Warpage
- Glossary
- Index.