Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Casting is a manufacturing process in which a liquid material is usually poured into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify. You are given a task to fabricate an engine block. In your own words, explain how to fabricate it using any suitable four types of processes which can be used and discuss the benefits of each processes
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- i need the answer quicklyarrow_forwardQuestion 7 A precision metal part needs to be manufactured using a casting process. The part needs to be made from a high melting point alloy, should have high dimensional accuracy, and weighs less than 2 Kg. Which process would you recommend and why? To support your answer you can compare your chosen process against other casting processes.arrow_forwardA flat plate is to be cast in an open mold whose bottom has a square shape of 12.5 cm by 12.5 cm. The mold is 7.0 cm deep. A total of 350 cm³ of molten aluminum is poured into the mold. Solidification shrinkage is known to be 6.25%, which is a volumetric contraction, not a linear contraction. Table 7.1 lists the linear shrinkage due to thermal contraction after solidification. If the availability of molten metal in the mold allows the square shape of the cast plate to maintain its square dimension until solidification is completed, determine the final dimensions (width and height) of the plate.arrow_forward
- For pouring the part, whose perspective pictures are given below, into sand mold,model design, core design if necessary, all molding steps andFinally, draw the mold in the best way to pour and shape all the mold elements.Name it by pointing on it (Note: The hole shown in the figure is a through hole.)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_forwardThe advantage of using an open mold is which one of the following: O higher production rates are possible smoother surfaces are achieved on both sides of the molding O the interior of the mold is accessible the mold costs much less than if two matching molds were usedarrow_forward
- Question No. 4: (20 points) Fill the empty boxes and describe the investment casting process (steps, advantages). Open riser Vent Flask Blind riser Core Sand (sand) - Choke Parting line Gate -Mold- cavity Well Sandarrow_forwardWhen precision services are required on castings which casting processes are most likely to need a secondary operation subsequent to casting?arrow_forwardA disk-shaped part is cast out of aluminium with a diameter of 630 mm and a thickness of 16 mm. If the mold constant is 2.2 sec/mm2 in Chvorinov's rule, how long will it take the casting to solidify?arrow_forward
- Pouring Calculations A mold sprue is 25 cm long, and the cross-sectional area at its base is 3.0 cm2. The sprue feeds a horizontal runner leading into a mold cavity whose volume is 1700 cm3. Determine: (a) velocity of the molten metal at the base of the sprue, (b) volume rate of flow, and (c) time to fill the mold. (The acceleration of gravity g = 981 cm/s2) use cm keep all unit in cmarrow_forwardProblem 1. Chapter 10 Pouring Calculations A mold sprue is 25 cm long, and the cross-sectional area at its base is 3.0 cm². The sprue feeds a horizontal runner leading into a mold cavity whose volume is 1700 cm³. Determine: (a) velocity of the molten metal at the base of the sprue, (b) volume rate of flow, and (c) time to fill the mold. (The acceleration of gravity g = 981 cm/s²)arrow_forward1. A square section riser be designed for a sand-casting mold. The casting itself is a quarter-cylinder with a diameter of 12cm and a length 20cm. The total solidification time for this casting = 0.9 min. The square for the riser will have a height-to-width ratio of 2.0. Determine the dimensions of the riser so that it is total solidification time = 1.2 min.arrow_forward
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