Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 10, Problem 50QTP
Pure copper is poured into a sand mold. The metal level in the pouring basin is 10 in. above the metal level in the mold, and the runner is circular with a 0.4-in. diameter. What are the velocity and rate of the flow of the metal into the mold? Is the flow turbulent or laminar?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Pure aluminium is poured into a sand mold. The metal level in the pouring basin is 203.2mm above the metal level in the mold, and the runner is circular with a 7.62 mm diameter.What is the velocity and the rate of flow of the metal into the mold? Is the flow turbulent orlaminar? Note that pure aluminum has a density of 2700 kg/m3and a viscosity of 0.004Ns/m
EX.2/The downsprue leading into the runner of a certain mold has a length = 175 mm.
The cross-sectional area at the base of the sprue is 400 mm2. The mold cavity has a
volume = 0.001 m3. Determine (a) the velocity of the molten metal flowing through
the base of the downsprue, (b) the volume rate of flow, and (c) the time required to fill
the mold cavity.
Step by step solution please
Chapter 10 Solutions
Manufacturing Engineering & Technology
Ch. 10 - Explain why casting is an important manufacturing...Ch. 10 - Why do most metals shrink when they are cast?Ch. 10 - What are the differences between the...Ch. 10 - What are dendrites? Why are they called so?Ch. 10 - Describe the difference between short and long...Ch. 10 - What is superheat? Is it important? What are the...Ch. 10 - Define shrinkage and porosity. How can you tell...Ch. 10 - What is the function of chills? What are they made...Ch. 10 - Why is the Reynolds number important in casting?Ch. 10 - What is a sprue? What shape should a sprue have if...
Ch. 10 - How is fluidity defined? Why is it important?Ch. 10 - Explain the reasons for hot tearing in castings.Ch. 10 - Why is it important to remove dross or slag during...Ch. 10 - Why is Bernoullis equation important in casting?Ch. 10 - Describe thixocasting and rheocasting.Ch. 10 - What is Chvorinovs Rule?Ch. 10 - How is a blister related to a scab?Ch. 10 - Is there porosity in a chocolate bar? In an ice...Ch. 10 - Describe the stages involved in the contraction of...Ch. 10 - Explain the effects of mold materials on fluid...Ch. 10 - It is known that pouring metal at a high rate into...Ch. 10 - Describe the events depicted in Fig. 10.5.Ch. 10 - Would you be concerned about the fact that...Ch. 10 - Review Fig. 10.8 and make a summary, explaining...Ch. 10 - Make a sketch of volume vs. temperature for a...Ch. 10 - What practical demonstrations can you suggest to...Ch. 10 - Explain why a casting may have to be subjected to...Ch. 10 - List and explain the reasons why porosity can...Ch. 10 - Why does porosity have detrimental effects on the...Ch. 10 - A spoked handwheel is to be cast in gray iron. In...Ch. 10 - Which of the following considerations are...Ch. 10 - Explain why the constant C in Eq. (10.7) depends...Ch. 10 - Are external chills as effective as internal...Ch. 10 - Explain why, as shown in Table 10.1, gray cast...Ch. 10 - Referring to Fig. 10.11, explain why internal...Ch. 10 - Note the shape of the two risers shown in Fig....Ch. 10 - Is there any difference in the tendency for...Ch. 10 - What is the influence of the cross-sectional area...Ch. 10 - It has long been observed that (a) low pouring...Ch. 10 - In casting metal alloys, what would you expect to...Ch. 10 - If you inspect a typical cube of ice, you are...Ch. 10 - How can you tell whether cavities in a casting are...Ch. 10 - Describe the drawbacks to having a riser that is...Ch. 10 - Reproduce Fig. 10.2 for a casting that is...Ch. 10 - List the process variables that affect the...Ch. 10 - Assume that you have a method of measuring...Ch. 10 - A round casting is 0.2 m (7.9 in.) in diameter and...Ch. 10 - A cylinder with a diameter of 2.0 in. and a height...Ch. 10 - The constant C in Chvorinovs rule is given as 2.5...Ch. 10 - Pure copper is poured into a sand mold. The metal...Ch. 10 - For the sprue described in Problem 10.58, what...Ch. 10 - When designing patterns for casting, pattern...Ch. 10 - Can you devise fluidity tests other than that...Ch. 10 - Figure P10.55 indicates various defects and...Ch. 10 - The fluidity test shown in Fig. 10.9 illustrates...Ch. 10 - Utilizing the equipment and materials available in...Ch. 10 - One method of relieving stress concentrations in a...Ch. 10 - Describe the effects on mold design, including the...Ch. 10 - Small amounts of slag often persist after skimming...Ch. 10 - Design an experiment to measure the constants C...
Knowledge Booster
Learn more about
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
- The velocity of the air is tripled in the problem above to 38.1 m/sec to increase the heat transfer rate from the mold. Calculate the new heat transfer rate (q).arrow_forwardB/ The sprue leading into the runner of a certain mold has a length is 150 mm. The cross- sectional area at base of the sprue is 400 mm². The mold cavity has a volume is 0.002 m². Determine: (a) the velocity of the molten metal flowing through the base of the sprue, (b) the volume rate of flow, and (c) the time required to fill the mold cavity.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
- What is the advantage in casting turbine blades that have either highly aligned grain boundaries or no grain boundaries at all?arrow_forwardWhy is the feeder used in the casting process? What is its significance and how should it be designed? Interpret by drawing in the figure.arrow_forwardFor the 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 finally, draw the mold in the most suitable form for casting and name all the mold elements by showing them on the figure (Note: The hole shown in the figure is a full hole. .)arrow_forward
- Converging passage is used for feeding the liquid molten metal into the mould to (a) increase the rate of feeding (b) quickly break off the protruding portion of the casting (c) decrease wastage of cast metal (d) avoid aspiration of airAarrow_forward/sufficient amount of pure copper is to be heated for casting a large plate in an open mold. The plate has dimensions: length 20 in, width 10 in, and thickness = 3 %3D in. Compute the amount of heat that must be added to the metal to heat it to a temperature of 2150°F for pouring. Assume that the amount of metal heated will be 10% more than what is needed to fill the mold cavity. Properties of the metal are:arrow_forward4. Draw the gating system in casting process?arrow_forward
- True centrifugal casting is performed horizontally to make large diameter copper tube sections. The tubes have a length = 2.0 m, outside diameter = 0.4 m, and wall thickness = 30 mm. (a) If the rotational speed of the pipe = 600 rev/min, determine the G-factor on the molten metal. (b) Is the rotational speed sufficient to avoid "rain?" (c) What volume of molten metal must be poured into the mould to make the casting if solidification shrinkage and contraction after solidification are considered? Solidification shrinkage for copper = 3.5%, and solid thermal contraction = 6.5%.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_forwardA mold has a downsprue of length = 20 inch. The cross‑sectional area at the bottom of the sprue is 3 inch2. The sprue leads into a horizontal runner which feeds the mold cavity, whose volume = 3000 inch3. A molten metal is poured down the sprue so that the cavity can be filled in 2 seconds. Determine (a) the initial velocity of the molten metal that would be required at the top of the downsprue (b) the volume rate of flow at the bottom of the downsprue, and (c) the velocity of the molten metal at the bottom of the downsprue. Ignore all friction effects, and assume g to be 32.174 feet/sec2arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University Press
Mechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSON
Thermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEY
Mechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage Learning
Engineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Casting Metal: the Basics; Author: Casting the Future;https://www.youtube.com/watch?v=2CIcvB72dmk;License: Standard youtube license