Introduction to Basic Manufacturing Processes and ... - always yours

240 Introduction to Basic Manufacturing Processes and Workshop Technology
35. Describe the process of shell molding indicating:
(i)
(ii)
(iii)
(iv)
(v)
Composition of sand mixture
Steps in molding
Advantages
Limitations and
Applications.
36. Describe the CO 2
–gas molding process in detail using suitable sketches and stat its
advantages, disadvantages and applications.
37. What is a core? What purposes are served by cores?
38. What are the characteristics of a good core?
39. Classify the types of cores? Explain them with the help of sketches specifying their common
applications.
40. What is a core binder?
41. What is core print?
42. Describe different types of core sand.
43. Describe hand core making and machine core making.
44. How are the cores finished and inspected?
45. What is the function of the core in sand molding? How are cores held in place in mold? And
how are they supported?
46. Distinguish between green sand cores and dry sand cores?
47. Name the different steps in core-making? Describe the operation of making a dry sand core?
48. What are the different stages in core making?
49. What are the different types of machines used in core-making?
50. Describe the following terms used in core-making.
(i) Core drying,
(ii) Core finishing
(iii) Use of rods, wires, arbors and lifting rings.