Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Textbook Question
Chapter 15, Problem 56RQ
What are some common ways to remove cores from castings? To remove sprues, runners, gates, and risers?
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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
where are the die cores placed in die casting?
4) List the passageway (gating system) elements in sand casting moulds and show
them with drawing?
Draw the stress-strain curve and gives the stress and strain equations for both
Engineering and True stress-strain
Chapter 15 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 15 - What are some of the major disadvantages of the...Ch. 15 - What are some possible limitations of multiple-use...Ch. 15 - Prob. 3RQCh. 15 - Prob. 4RQCh. 15 - Why do permanent-mold castings generally have...Ch. 15 - Prob. 6RQCh. 15 - What is semipermanent-mold casting?Ch. 15 - Why might low production runs be unattractive for...Ch. 15 - Prob. 9RQCh. 15 - In addition to the mold cavity, what additional...
Ch. 15 - Prob. 11RQCh. 15 - Prob. 12RQCh. 15 - Prob. 13RQCh. 15 - Prob. 14RQCh. 15 - Prob. 15RQCh. 15 - Prob. 16RQCh. 15 - What types of products would be possible...Ch. 15 - Prob. 18RQCh. 15 - What are the most common die-cast materials?Ch. 15 - Contrast the materials used to make dies for...Ch. 15 - Prob. 21RQCh. 15 - Prob. 22RQCh. 15 - Prob. 23RQCh. 15 - Prob. 24RQCh. 15 - Prob. 25RQCh. 15 - Prob. 26RQCh. 15 - How does the air in the mold cavity escape in the...Ch. 15 - Are risers employed in die casting? Can sand cores...Ch. 15 - Prob. 29RQCh. 15 - Give some examples of cast-in inserts.Ch. 15 - Prob. 31RQCh. 15 - Prob. 32RQCh. 15 - Prob. 33RQCh. 15 - Prob. 34RQCh. 15 - Prob. 35RQCh. 15 - What is a thixotropic material? How does it...Ch. 15 - What are some of the attractive features of...Ch. 15 - Describe the inner surface profile of true...Ch. 15 - Prob. 39RQCh. 15 - Prob. 40RQCh. 15 - Prob. 41RQCh. 15 - Prob. 42RQCh. 15 - Prob. 43RQCh. 15 - What types of equipment are used by foundries to...Ch. 15 - What are some of the factors that influence the...Ch. 15 - What are some of the possible feedstock materials...Ch. 15 - What types of metals are commonly melted in...Ch. 15 - What are some of the ways that the melting rate of...Ch. 15 - What are some of the pros and cons of indirect...Ch. 15 - Prob. 50RQCh. 15 - Prob. 51RQCh. 15 - Prob. 52RQCh. 15 - What are the primary functions of a pouring...Ch. 15 - Prob. 54RQCh. 15 - Prob. 55RQCh. 15 - What are some common ways to remove cores from...Ch. 15 - Prob. 57RQCh. 15 - Prob. 58RQCh. 15 - What is the difference between infiltration and...Ch. 15 - Prob. 60RQCh. 15 - What are some of the ways that industrial robots...Ch. 15 - Prob. 62RQCh. 15 - Prob. 63RQCh. 15 - Attractive properties for casting alloys include...Ch. 15 - Prob. 2PCh. 15 - Prob. 3PCh. 15 - Prob. 4PCh. 15 - Select two of the methods used to produce and hold...Ch. 15 - Prob. 7PCh. 15 - Discuss the various features that this component...Ch. 15 - Prob. 3CSCh. 15 - Prob. 4CSCh. 15 - Prob. 5CSCh. 15 - Prob. 6CS
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- identify some of the important advantages of shape-casting processarrow_forwardIn turbine blade casting, how is a single-crystal structure achieved? Select one or more: a. By using a curving coil-like channel in the casting mould b. By removing grain boundaries by hot working and recrystallisation c. By careful control of the temperatures of the mould d. By introducing impurities into the molten alloy in the mouldarrow_forwardWhich among the following design considerations for casting to be followed to reduce stress concentration in parts? O a. Shape the casting for orderly solidification O b. Avoid abrupt changes in cross section Oc Avoid thin sections O d. Make provision for easy removal of pattern from the mouldarrow_forward
- What is gating system in casting?arrow_forwardQUESTIONS 1- Describe with net sketch: a. Pattern b. Riser c. Runners d. Core 2- Compare between open mold and closed mold. 3-Explain the main Procedures of Sand Casting. 4 - What are the important properties which are essential in good molding sand? Explain in details. 5- Mention advantages and disadvantages of casting. 6- Describe types of sand mold. 7- What are the common binders of sand mold and cores? 8- Describe Desirable Mold Properties. 9- Explain two types of patterns and two pattern allowances 10- Describe with sketches shell process casting (i) Composition of sand mixture (ii) Steps in molding (iii) Advantages (iv) Limitations and (v) Applications 11- Explain with Sketch the construction and operation of a hot chamber die casting machine. 12- Compare between hot chamber die casting and hot chamber die casting. 13- What is meant of investment casting? What are the main materials used for making the investment pattern. 14- Describe various kinds of patterns in use. 15- Why…arrow_forwardA vertical true centrifugal casting process is used to produce bushings that are 200 mm long and 200 mm in outside diameter. If the rotational speed during solidification is 500 rev/min, determine the inside diameter at the top of the bushing if the inside diameter at the bottom is 150 mm? Ans. Dt = 167.98 mm.arrow_forward
- Nonearrow_forwardpouring 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, when making a pattern? How do the patterns differ from the casting required?arrow_forwardWhat is a pattern? What are the consideration necessary while designing pattern in casting?arrow_forward
- QUESTION 1 a) Explain what is the basic difference between expendable and permanent molds used in metal casting? Briefly also describe what are the primary advantage and disadvantage of each these two types of molds? (CO1, PO1, C2) b) Describe the steps involved in making the sand mold and the casting, including what steps that may be needed to improve the casting after it is hardened and removed? (C01, PO1, C2) c) One of Open Mold processes for shaping fibre reinforced plastics (FRP) is Hand Lay Up. List the five (5) steps involved in the Hand Lay Up method? (CO2, PO1, C2`arrow_forwardOnly answer question 4arrow_forwardEX.3//A cylindrical riser must be designed for a sand-casting mold. The casting itself is a steel rectangular plate with dimensions 7.5 cm x 12.5 cm x 2.0 cm. Previous observations have indicated that the total solidification time (TTs) for this casting =1.6 min. The cylinder for the riser will have a diameter-to-height ratio=1.0. Determine the dimensions of the riser so that its TTS = 2.0 min.arrow_forward
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