Injection Moulding Materials

Injection Moulding Materials
A. Whelan
National College of Rubber Technology,
The Polytechnic of North London,
Contents
Preface
Chapter 1 Moulding Materials and Materials Handling
1. Introduction
2. Delivery of Plastics
3. In-plant Materials Handling
4. Material Reclamation
5. Drying.
6. Mixing and Blending
7. Colouring Systems
Chapter 2 Moulding Machines and Processes
1. Types of Machine
2. Ram Machines
3. Two-stage Preplasticising Systems.
4. In-line Preplasticising Systems
5. Other Machine Types
6. Injection Mould Types .
7. Alternative Moulding Techniques
8. Reaction Injection Moulding
Chapter 3 Machine Specifications
1. Facts Included
2. The Injection Unit
3. The Clamping Unit
4. The Hydraulic System
5. Control and Setting
6. Optional Extras
7. Safety .
8. Machine Purchase
Chapter 4 Component Finishing and Decoration
1. Flash Removal and Buffing
2. Machining of Plastics .
3. Metallisation
4. Printing on Mouldings .
5. Painting
6. Welding
7. Mechanical Joining
8. Adhesive Bonding
Chapter 5 Effect of Processing on Properties
1. Introduction 168
2. General Effect of Orientation and Crystallinity on Properties 169
3. Mould Filling, Packing and Stress Relieving 172
4. Detection of Orientation and Crystallinity 179
5. Effect of Moulding Conditions on Properties. 185
6. Effect of Changing Gate Size and Position 193
7. Experiment Design in Injection Moulding 198
8. Moulding Quality and Unknown Changes 203
Chapter 6 Testing and Quality Control
1. The Object of Testing
2. Standardisation
3. Common Short-term Tests
4. Long-term Testing
5. Injection Moulding of Plastics Test Specimens
6. Quality Control and Testing .
Chapter 7 Material Recommendations for Injection Moulding
1. Polystyrene .
2. Styrene Acrylonitrile
3. Toughened Polystyrene.
4. Acrylonitrile-butadiene Styrene
260contents Ix
5. Acrylic. 264
6. Unplasticised Polyvinyl Chloride 268
7. Plasticised Polyvinyl Chloride 272
8. Cellulosics 275
9. Polycarbonate 280
10. Polyethersulphone 284
Ii. Polyphenylene Oxide (Modified) 289
12. Low Density Polyethylene 292
13. High Density Polyethylene 297
14. Polypropylene 301
15. Polybutylene Terephthalate 305
16. Nylon . 309
17. Acetals 316
18. Polyvinylidene Fluoride· 319
19. Polyphenylene Sulphide 323
20. Rubber Reinforced Polypropylene. 327
2i. Thermoplastic Polyurethane 331
22. Sbs Block Copolymers . 336
23. Thermoplastic Polyetherester 340
24. Fibre Reinforced Thermoplastics 344
25. Structural Foam 349
26. Aminoplastics 354
27. Phenolics 359
28. Dough Moulding Compound 363
29. Elastomers 367
Appendix I Euromap Documents . 384
Appendix Ii Troubleshooting 387
Index 391
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