Foundry Technology – II Students Handbook

Foundry Technology – II Students Handbook
Class Xii
Central Board of Secondary Education
2, Community Centre, Preet Vihar, Delhi – 110092
Table of Contents
Chapter 1: Special Moulding and Casting Processes
1.0 Unit Overview & Description 1
1.1 Introduction 3
1.2 Gravity Die Casting 3
1.3 Pressure Die Casting 6
1.4 Centrifugal Casting Processes 10
1.5 Shell Mould Casting 15
1.6 Investment Casting 17
1.7 Plaster Mould Casting 21
1.8 Ceramic Mould Casting 22
1.9 Summary 24
CHAPTER 2: MELTING AND POURING PRACTICE
2.0 Unit Overview & Description 26
2.1 Introduction of Metal Melting Process 28
2.2 Cupola Melting 30
2.3 Electric Furnaces 33
2.4 Induction Furnace 36
2.5 Influence Of Melting And Pouring Practice On Casting Quality 37
2.6 Pouring Ladles 38
2.7 Summary 40
CHAPTER 3: PRODUCTION PRACTICE FOR FERROUS AND NON FERROUS
CASTINGS
3.0 Unit Overview & Description 42
3.1 Introduction 43
3.2 Production Practice for Cast Iron Castings 46
3.3 Production Practice for Steel Castings 52
3.4 Production Practice for Non Ferrous Castings 60
3.5 Summary 67
CHAPTER 4: CAST METALS TECHOLOGY
4.0 Unit Overview & Description 69
4.1 Introduction and Characteristics Of Metals 71
4.2 Cast Irons Technology 75
4.3 Cast Steels Technology 86
4.4 Non – Ferrous Cast Alloys 92
4.5 Summary 97viii
Foundry Technology-II (Students Handbook)
CHAPTER 5: TESTING AND QUALITY ASSURANCE IN FOUNDRY
5.0 Unit Overview & Description 98
5.1 Introduction 100
5.2 Cleaning Of Casting 100
5.3 Testing of Castings 104
5.4 Casting Defects and Remedies 117
5.5 Summary 122

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