كتاب METAL CASTING Appropriate technology in the small foundry

كتاب عن عمليات السباكه المختلفة
METAL CASTING Appropriate technology in the small foundry STEVE HURST
اتمنى ان تستفيدو منة وان ينال اعجابكم
المحتوى :Contents
Preface ix
Acknowledgements x
1 Introduction 1
Making a choice of production method 1
Advantages and disadvantages of each process 4
Examples 8
2 Setting up the workshop 10
The small workshop or sand foundry 11
The workshop for a lost-wax foundry 12
Examples of foundry designs 13
3 Pattern making 15
Materials 15
Skills 18
Designing the pattern 18
Storing patterns 23
4 Flexible moulds for the mass-production of wax patterns . . . . 25
Making the case for a flexible mould 26
Making a rubber mould 28
Gelatine moulding 32
Mixing plaster 35
Summary 36
5 Sand casting 38
Essential moulding equipment 39
Making a simple, solid casting 40
Making a simple casting using a split pattern 47
Hollow casting 49
The nature of moulding sand 54
Other sand processes 58
6 Lost-wax casting 60
Waxes 62
Moulding the wax 65
The block investment process 67
Kiln firing (de-waxing) 76
The clay slurry investment method 78
Inca silver 837 The ceramic shell process 85
Equipment 86
The ceramic shell process in outline 87
The process in detail 87
8 Die casting 102
Examples of the technique 102
Finding and correcting faults in the castings 104
9 Melting and pouring metal 107
Summary 107
Safety precautions 110
10 Metallurgy and the low budget foundry Ill
The structure of metals Ill
Selection of scrap metals for casting 114
Alloying 117
Metal melting 119
Metal flow and solidification 122
11 Kilns and furnaces 126
The furnace drum 127
Kilns 135
Crucibles 141
Conclusion 146
12 Faults, fettling and finishing 147
Common faults in castings 147
Fettling and finishing 151
Appendices
A Newar casting in Patan, Nepal 157
B Bamoum lost-wax casting, western Cameroon 163
C The Dedza crucible 171
D Sand conditioning and testing 175
E Other sand processes 181
F Summary of ceramic shell investment processes 185
Further reading 195
Glossary 199
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