A 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/sec2

Question
Asked Oct 9, 2019
54 views

A 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/sec2

check_circle

Expert Answer

Step 1

Design of Sprue is,

fullscreen
Step 2

The total height of the sprue is, ht=h1+h2

From the expression of filling time,

help_outline

Image Transcriptionclose

Volume of mould A22gh 3000 inch3 2 s (3 inch2) 2gh (500 inch/s) 2(32.174 ft/s2 h, 323.76 inch hh 323.76 inch h= 303.76 inch

fullscreen
Step 3

The molten metal has in...

help_outline

Image Transcriptionclose

2gh 2(32.174 ft/s2)(303.54 inch) = 40.34 ft/s

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Engineering

Mechanical Engineering

Related Mechanical Engineering Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: 12.3-2. Determination of Thermal Conductivity. In determining the thermal conductivity msu of an ins...

A: Given:

question_answer

Q: True or False: The LENGTHEN command doesn’t work with arcs.

A: While using the LENGTHEN command, the Delta and angle options allows the user to lengthen or shorten...

question_answer

Q: Air at 30°C is contained in a piston-cylinder assembly, as shown in the figure. The piston has a wei...

A: Draw the schematic diagram of the given system as shown in figure (1).

question_answer

Q: What is the class of fit of a ½-20 UNF-2B thread?

A: The united thread series is classified into coarse threads, fine threads and extra fine threads. The...

question_answer

Q: I was given this image for the purpose of studying for an upcoming exam. No additional info was give...

A: The given figure is related to the problem in which a body is thrown at initial velocity vB and at a...

question_answer

Q: Prob lem 1 Jnve stigple ihsubation e enhuel Haere s wheaher Nadus for shene Fa Kus purpok foluan. th...

A: Draw the cross-section for the hollow sphere without insulation. Consider an arbitrary section at a ...

question_answer

Q: I need questions 8, 9, and 10 answered pertaining to the print provided below.

A: (8). The name of the part is INLET PORTING PLATE.

question_answer

Q: Current Attempt in Progress along the vertical-plane circular slot of radius r 1.4 m and is confined...

A: Draw the free body diagram of the system. 

question_answer

Q: Steam enters a turbine operating at a steady state at a pressure of 4 MPa, at temperature of 400 deg...

A: Write the energy balance equation for the steady flow turbine as given as follows: