EBK MANUFACTURING PROCESSES FOR ENGINEE
6th Edition
ISBN: 9780134425115
Author: Schmid
Publisher: YUZU
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Chapter 5, Problem 5.113D
To determine
Design the casting gemstones set in wax. Also, possibility of uses of such process in lost foam casting.
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2. What do the various elements that comprise the gating system? what are the
pouring basin in a sand casting?
3. Explain why a sprue should be tapered?
4. What are the disadvantages of die casting?
5. Explain the various kinds of patterns in use. What are the allowances provided
How do the patterns differ from the casting required?
6. Define Expendable-mold, Expendable-pattern Casting Processes
3. (Slow or Fast, which one? – Circle one) cooling rates results in coarse dendritic structures.
4. The higher the viscosity of the melt, the .
its fluidity?
5. Name 3 defects in casting:
6. Internal or external
are an effective means of reducing shrinkage porosity during solidification.
7. Is green-sand molding expensive?
8.
.... are inserts placed in the molds to form the hollow regions in casting.
9. The method of casting turbine blades:
Sample A
10. Which one has higher stiffness? Sample A or Sample B
Sample B
11. Which one has higher toughness? Sample A or Sample B
12. Which one has higher strength? Sample A or Sample B
13. Which one has higher ductility? Sample A or Sample
14. Higher
......... means more rigidity.
Strain
15. Before the no-slip point, the velocity is (higher or lower, which one? - Circle one)
16. In flat-rolling process, using smaller diameter rolls (increases or decreases, which one? - Circle one) the roll
force.
17. Balls for ball bearings can be made by
rolling…
What is a pattern? What are the consideration necessary while designing pattern in casting?
Chapter 5 Solutions
EBK MANUFACTURING PROCESSES FOR ENGINEE
Ch. 5 - Prob. 5.1QCh. 5 - Prob. 5.2QCh. 5 - Prob. 5.3QCh. 5 - Prob. 5.4QCh. 5 - Prob. 5.5QCh. 5 - Prob. 5.6QCh. 5 - Prob. 5.7QCh. 5 - Prob. 5.8QCh. 5 - Prob. 5.9QCh. 5 - Prob. 5.10Q
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- Which of these factors causes more porosity to form toward the interior of a casting rather than toward the outside? (a) Gasses are less soluble in the solid metal than the liquid, so solidified areas push dissolved gasses toward the interior. (b) Casting under a vacuum causes gasses near the liquid metal surface to be drawn out of the liquid during solidification. (c) The feeding structures of the mold are designed to force entrapped air into the center of the casting. (d) Draft on the mold wall forces air bubbles toward the interior of the solidifying metal. (e) None of the above Non-eutectic alloys (most commercial alloys) solidify over a temperature range. Which of the following statements explains how this affects the casting process. (a) Solidified non-eutectic alloys are especially difficult to remove from metal dies (b) Non-eutectic alloys have significantly less fluidity than pure metals or eutectic alloys. (c) Non-eutectic alloys solidify starting from the outside of the…arrow_forward4. Riser (a) What is the purpose of a riser in sand casting? (b) What are the design parameters for a riser, and what are the design constraints that you need to satisfy given your answer in (a)? (c). Assuming you are using a sand casting process, use an example to show the appropriate relationships between the design parameters for your riser that result in the longest solidification time.arrow_forward3) What are the means of elastic and plastic deformations? List the passageway (gating system) elements in sand casting moulds and show them with drawing?arrow_forward
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