DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Chapter 14, Problem 33RQ
To determine
The distribution of sand density after compaction by different methods.
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Describe the following two important sand casting
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(i) Misrun
(ii) Pin Holes
12.Silica sand has which one of the following compositions: (a) A12O3,
(b) SiO, (c) SiO2, or (d) SISO4?
13.A misrun is which one of the following defects in casting: (a)
globules of metal becoming entrapped in the casting, (b) metal is not
properly poured into the downsprue, (c) metal solidifies before
filling the cavity, (d) microporosity, and (e) "pipe" formation?
QUESTIONS
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…
Chapter 14 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 14 - What are some of the factors that influence the...Ch. 14 - What are the three basic categories of casting...Ch. 14 - What metals are frequently cast into products?Ch. 14 - What features combine to make cast iron and...Ch. 14 - Which type of casting is the most common and most...Ch. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - What is the simplest and least expensive type of...Ch. 14 - What is a match plate, and how does it aid...Ch. 14 - How is a cope-and-drag pattern different from a...
Ch. 14 - Prob. 11RQCh. 14 - Prob. 12RQCh. 14 - For what types of products might a loose-piece...Ch. 14 - What are the four primary requirements of molding...Ch. 14 - Prob. 15RQCh. 14 - Prob. 16RQCh. 14 - What is a muller, and what function does it...Ch. 14 - Prob. 18RQCh. 14 - What is a standard rammed specimen for evaluating...Ch. 14 - What is permeability, and why is it important in...Ch. 14 - How does the ratio of water to clay affect the...Ch. 14 - How is the hardness of molding sand determined?Ch. 14 - Prob. 23RQCh. 14 - How does the size and shape of the sand grains...Ch. 14 - Prob. 25RQCh. 14 - Prob. 26RQCh. 14 - Prob. 27RQCh. 14 - Prob. 28RQCh. 14 - Prob. 29RQCh. 14 - Prob. 30RQCh. 14 - What are hot tears, and what can cause them to...Ch. 14 - When might hand ramming be the preferred method of...Ch. 14 - Prob. 33RQCh. 14 - Prob. 34RQCh. 14 - Prob. 35RQCh. 14 - Prob. 36RQCh. 14 - What is stack molding?Ch. 14 - Prob. 38RQCh. 14 - What are the components of green sand?Ch. 14 - Prob. 40RQCh. 14 - Prob. 41RQCh. 14 - Prob. 42RQCh. 14 - What are some of the advantages and limitations of...Ch. 14 - Prob. 44RQCh. 14 - Prob. 45RQCh. 14 - Prob. 46RQCh. 14 - Prob. 47RQCh. 14 - Prob. 48RQCh. 14 - Prob. 49RQCh. 14 - Why do shell molds have excellent permeability and...Ch. 14 - Prob. 51RQCh. 14 - Prob. 52RQCh. 14 - Prob. 53RQCh. 14 - Prob. 54RQCh. 14 - Prob. 55RQCh. 14 - What is the sand binder in the core-oil process,...Ch. 14 - What is the binder in the hot-box core-making...Ch. 14 - What is the primary attraction of the cold-box...Ch. 14 - What is shelf life? How is it different from bench...Ch. 14 - Prob. 60RQCh. 14 - Prob. 61RQCh. 14 - Prob. 62RQCh. 14 - Prob. 63RQCh. 14 - Prob. 64RQCh. 14 - Prob. 65RQCh. 14 - Why are plaster molds only suitable for the...Ch. 14 - How does the Antioch process provide permeability...Ch. 14 - What is the primary performance difference between...Ch. 14 - Prob. 69RQCh. 14 - Prob. 70RQCh. 14 - Prob. 71RQCh. 14 - Describe the progressive construction of an...Ch. 14 - Why are investment casting molds generally...Ch. 14 - Prob. 74RQCh. 14 - What are some of the attractive features of...Ch. 14 - What recent development has made one-of-a-kind or...Ch. 14 - Prob. 77RQCh. 14 - Prob. 78RQCh. 14 - What are some of the benefits of not having to...Ch. 14 - What are some of the ways by which expanded...Ch. 14 - Prob. 81RQCh. 14 - Prob. 82RQCh. 14 - Prob. 83RQCh. 14 - Prob. 84RQCh. 14 - Prob. 85RQCh. 14 - Prob. 86RQCh. 14 - What are the most common single-use mold...Ch. 14 - What are the most common methods of core...Ch. 14 - Although cores increase the cost of castings, they...Ch. 14 - Several of the additive manufacturing processes...Ch. 14 - Additive manufacturing processes can also build...Ch. 14 - Figure CS-14 shows the hitch ball component of a...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- What is the major limitation of green-sand cores? What are core-prints and chaplets? What are some of the restrictions on their use, size, and chemistry?arrow_forward4) 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-strainarrow_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
- 7. What are the basic requirements of core sand? How does it differ from the moulding sand?arrow_forwardWhich of the following is not counted as mould characteristics? O a. Possession of refractoriness O b. Resist metal penetration in moulds O c. Possession of strength O d. Resist corrosion ENG a US 12arrow_forwardSketch a simple part that can be green sand or injection molded. Sketch at least one view of the part. Draw the part in casting orientation. Choose the parting line and label it. Decide if cores are necessary and label them.arrow_forward
- Q1.Write down your answer briefly. i) Why is the permeability of shell mold higher as compared to sand mold? ii)What type of die casting process is mostly preferable for higher production rate? Justify your answer. iii) Bauschinger effect can be reduced by the stress aging process. Justify your answer. iv) Why is the sand for foundry practice called green sand? Can it be used for the core making process? v) What is moldability? How do you determine moldability of molding sand? vi) Which casting process is usually preferred for producing long tubular objects? Is it possible to manufacture a solid and parallelepiped object having different dimensions in a centrifugal casting process? Justify your answer. vii) What is directional solidification? How does a riser promote directional solidification?arrow_forward2. Briefly state the importance of sand testing 3. Describe explain the term Green moulding sand 4. Beside silica sands, what other types of sands are used in foundry? Briefly describe them. 5. Name the various additives used in moulding sand and explain how they affect its properties 6. Differentiate between binding and non-binding additives 7. Name the different types of clay used in the foundry industryarrow_forwardIn 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_forward
- Explain the se two Foundry Process. 1.Open Sand Method 2. Bedded in Method.arrow_forward2. State one casting defect associated with excess moisture content in the mould. 3. State two reasons why moisture is required in moulding sand 4. Knust steel foundry shop is to formulate a moulding sand containing sand, clay and water only, in the sand to clay fraction of and respectively. If the sand obtained is dry but the clay is moist with moisture content of 15%, how much water should be added to formulate 850g moulding sand?arrow_forward6. The part of gating system which regulates the rate of pouring of molten metal in the mold is called 7. High refractoriness of a material refers to its. b. Chemical strength towards other material d. Ability to get dissolved in molten metal a. Slipperiness of the material c. Strength to withstand high temperature e. None of the above Your answer is: . 8. Usually weaker constituent of a composite is called . 9. Which polymer is the most important commercially: a. thermoplastics c. elastomers b. thermosets d. all of the above e. None of the above Your answer is: 10. Which of the following casting processes are expendable mold operations: a. centrifugal casting c. investment casting e. sand casting b. die casting d. low pressure casting f. None of the above Your answer is:arrow_forward
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