Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 12, Problem 13QLP
If you need only a few castings of the same design, which three processes would be the most expensive per piece cast?
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For the sand casting of the part whose perspective pictures are given below, take into account the surface of the section, the model design, if necessary, the core design, all the molding stages and and finally draw the most suitable form mold for casting, and name all the mold elements by showing them on the figure (Note: The hole shown in the figure, full hole.)
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For the sand casting of the part whose perspective pictures are given below, take into account the surface of the section, the model design, if necessary, the core design, all the molding stages and and finally draw the most suitable form mold for casting, and name all the mold elements by showing them on the figure (Note: The hole shown in the figure, full hole.)
Chapter 12 Solutions
Manufacturing Engineering & Technology
Ch. 12 - Why are steels more difficult to cast than cast...Ch. 12 - What is the significance of hot spots in metal...Ch. 12 - What is shrinkage allowance? Machining allowance?Ch. 12 - Explain the reason for drafts in molds.Ch. 12 - Prob. 5RQCh. 12 - What are light castings and where are they used...Ch. 12 - Name the types of cast irons generally available,...Ch. 12 - Comment on your observations regarding Fig. 12.5.Ch. 12 - Describe the difference between a runner and a...Ch. 12 - What is the difference between machining allowance...
Ch. 12 - What is dross? Can it be eliminated?Ch. 12 - Describe your observation concerning the design...Ch. 12 - If you need only a few castings of the same...Ch. 12 - Do you generally agree with the cost ratings in...Ch. 12 - Describe the nature of the design differences...Ch. 12 - Note in Fig. 12.5 that the ductility of some cast...Ch. 12 - Do you think that there will be fewer defects in a...Ch. 12 - Explain the difference in the importance of drafts...Ch. 12 - What type of cast iron would be suitable for...Ch. 12 - Explain the advantages and limitations of sharp...Ch. 12 - Explain why the elastic modulus, E, of gray cast...Ch. 12 - If you were to incorporate lettering or numbers on...Ch. 12 - The general design recommendations for a well in...Ch. 12 - The heavy regions of parts typically are placed in...Ch. 12 - What are the benefits and drawbacks to having a...Ch. 12 - When designing patterns for casting, patternmakers...Ch. 12 - Using the information given in Table 12.2, develop...Ch. 12 - The part in Figure P12.28 is to be cast of 10% Sn...Ch. 12 - Describe the general design considerations...Ch. 12 - Add more examples of applications to those shown...Ch. 12 - Explain how ribs and serrations are helpful in...Ch. 12 - List casting processes that are suitable for...Ch. 12 - Small amounts of slag and dross often persist...Ch. 12 - If you need only a few units of a particular...Ch. 12 - For the cast metal wheel illustrated in Fig....Ch. 12 - Assume that the introduction to this chapter is...Ch. 12 - In Fig. P12.37, the original casting design shown...Ch. 12 - An incorrect and a correct design for casting are...Ch. 12 - Using the method of inscribed circles, shown in...Ch. 12 - A growing trend is the production of patterns and...Ch. 12 - Repeat Problem 12.40 for the case where (a) a...
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- 2. 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_forward3. (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…arrow_forwardWhy are aluminum and copper alloys unsuitable for use in hot chamber die castingarrow_forward
- What are some of the materials used to make casting patterns and their advantages and disadvantages no less than 3arrow_forwardConsider the yellow metal mounting clip shown in Figure 3. Your job shop has been contracted to make 1,000 pieces this year, with possibility of making 2,000 more each year in the future. Consider the process options below, which option is the best? a) using investment casting, cast each clip paint each clip b) using a shearing press, pierce the hole, the slots and the 'gap/break' of each clip from a piece of flat sheet metal using a shearing press, blank each clip from the pierced piece of flat sheet metal deburr each clip as necessary using a press brake, make two bends in each clip acid-pickle wash each clip paint each clip c) Using a sand mold, casting each clip clean each clip paint each clip d) using injection molding, mold each clip paint each cliparrow_forwardQUESTION 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_forward
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Casting Metal: the Basics; Author: Casting the Future;https://www.youtube.com/watch?v=2CIcvB72dmk;License: Standard youtube license