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 21RQ
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Why the chills are used in moulds in casting?
In sand casting of hollow part of lead, a cylindrical core of diameter 120 mm and height 180 mm is placed inside the mould cavity. The densities of core material and lead are 1600 kg/m3 and 11300 kg/m³ respectively. The net force (in N) that tends to lift he core during pouring of molten
metal will be
Question 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.
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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- Suggest the optimum parameter setting or methods to obtain high quality moulded parts.arrow_forwardExplain the working of principles of the die casting process which is most preferred of the high production rate?arrow_forwardYou are designing a mold to cast the solid part shown in the figure below from pure copper. If the runner diameter is 1 in and the molten copper velocity in the runner is 0.5 in/s. If the Chvorinov Constant is 50 S/in². Calculate the number of casts we can fill and solidify on a single sand mold in 1 shift = 8 hours duration? Part Dimensions in inches A = 5 B=3 C=3 D=3 E=2 E F= 2arrow_forward
- Why are aluminum and copper alloys unsuitable for use in hot chamber die castingarrow_forwardCalculate the size of a cylindrical riser (Height and diameter equal ) necessary to feed slab casting 45 * 45 * 25 cm with a side riser , casting poured horizontally in to the mould.Use caine's equation and take constants in caine equation as a= 0.18; b = 0.05 and c= 1.0.arrow_forwardExample#2 A cylindrical riser with diameter-to-length ratio = 1.0 is to be designed for a sand casting mold. The casting geometry is illustrated in Figure. If the mold constant = 19.5 min/in? in Chvorinov's Rule, determine the dimensions of the riser so that the riser will take 0.5 minute longer to freeze than the casting itself. -2.5- -6.0- -1.5 3.0 2.5 radius - 3.0 5.0 15.0arrow_forward
- Q3 Give the reason for 10 of the following. - 1- The use of lubricant in wire drawing die. 2- The uses of tungsten carbide for the manufacturing of die tool. 3- The increase of Mo/Si ratio during the production of white cast iron. 4- The addition of Al to copper alloys. 5- Aluminum is a better overall conductor than Copper for long distance electric transformation. 6- The addition of cryolite in smelting electrical furnace due to the production of aluminum. 7- The addition of Magnesium and Cerium during the production of Ductile cast iron. 8- The addition of 13% Cr to steel in corrosive environment. 9- The increase of hardness for chips due to the cutting process. 10- The brittle fracture of steel at low temperature lower than -4 C. 11- The heating of metal after the rolling process.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_forward2) With neat sketch explain the working of Hot chamber die castingarrow_forward
- In sand moulding and casting process, which of the following is the purpose of a chill? a. To increase the rate of heat extraction from the casting b. To reduce the possibility of blow holes O c. To increase the surface finishing of the casting d. To decrease the solidification timearrow_forwardDiscuss when might low quantities be justified for the die-casting process?arrow_forwardThe height of the down sprue is 175 mm and its CS are at the base is 200 mm² The CS area of the horizontal runner is also 200 mm² Assuming no losses, indicate the correct choice for the time (second) required to fill a mould cavity of volume 106 mm³ (Use g=10 m/s^ 2 )arrow_forward
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