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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Chapter 15, Problem 62RQ
To determine
Features that affect the cost of cast product and its dependency to the number of castings.
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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
What is a pattern? What are the consideration necessary while designing pattern in casting?
Explain the working of principles of the die casting process which is most preferred of the high production rate?
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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- 3) 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_forwardWhich 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_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
- Describe the detailed processes about the Expendable-Pattern casting. Please use numbered lists to show each step and process.arrow_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_forward2. 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 Processesarrow_forward
- Why Venting holes and passageways must be built in die casting and not in sand casting? Why the cost of products reduce when increase the quantity? Why the actual size and shape of the cavity must be slightly oversized the product?arrow_forwardQuestion 3 3.1 Briefly explain the Casting and Molding processes and define their basic requirements. 3.2 If a manufacturer was asked to produce a set of plastic bottles, which method would you suggest? Justify your answer. 3.3 What is the Forging process? Explain the process including two forged products. 3.4 Briefly explain the heat treatment processing techniques using a phase diagram.arrow_forwardWhy the chills are used in moulds in casting?arrow_forward
- Describe the stages involved in the contraction of metals during casting.(a) Contraction of the molten metals as it cools prior to its solidification.(b) Contraction of the metal during phase change from liquid to solid.(c) Contraction of the solidified metals as its temperature drops to ambient temperature.(d) All of above.(e) None of above.2. What kinds of defects in castings?(a) Hot tear.(b) Surface scar.(c) Plastic deformation.(d) Ductile flow.3. How does porosity have detrimental effects on the mechanical and physical properties ofcastings?(a) Pores in castings are resulted from internal discontinuities when that are prone topropagate under external stresses.(b) The toughness of a material will decrease as a result of porosity.(c) Physical properties, such as thermal and electrical conductivity, also be adverselyaffected by porosity.(d) Pores increase the strength and elastic modulus.(e) Porosity increases both the thermal and electrical conductivity4. Thermosetting plastics can…arrow_forwardDiscuss when might low quantities be justified for the die-casting process?arrow_forwardNonearrow_forward
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