Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Textbook Question
Chapter 10, Problem 15RQ
Describe thixocasting and rheocasting.
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لانقطة واحدة
of Warm working
The advantages
over cold working are: 1) forces and
power are higher,2) more intricate
work geometries possible, and 3)
need for annealing may be reduced
.or eliminated
T
F
Blow molding is an important
industrial process for making one-
piece hollow plastic parts with thick
.walls
T
Sly The sequence of the Blow Molding
is automated and often integrated
with downstream operations such
.as bottle filling and labeling
T
لنقطة واحدة
Question 3
3.1 Briefly explain the Casting and Molding processes and define their basic requirements.
3.2 If a manufacturer was asked to produce a set of plastic bottles, which method would you suggest?
Justify your answer.
3.3 What is the Forging process? Explain the process including two forged products.
3.4 Briefly explain the heat treatment processing techniques using a phase diagram.
4) 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-strain
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...
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- What means product quality ? What characristics does the term product quality include ? 2 - what steps are included in the molding process, list them ?arrow_forwardIn full mould (cavity-less) casting process, the pattern is made of (A) Expanded polystyrene (B) Wax (C) Epoxy (D) Plaster of Parisarrow_forward3) What are the means of elastic and plastic deformations? List the passageway (gating system) elements in sand casting moulds and show them with drawing?arrow_forward
- answer quicklyarrow_forwardExplain the extrusion blow molding in detail.arrow_forwardCalculate mould dimension for sprue runner and in-gate, the material using fluorothermoplastic and using injection molding. Question: 1. explain the steps for making a mold 2. If possible, use a simulation of the position where the defect will occur 3. Calculate to make mold male and female, the shape is near net shape product and determine material for dies, the liquid materials is 167°C Guidelines Sprue Gate Guidelines L 50% W1 A1 2-3° W1 20- 100% of W2 R1 > 1.5 mm T2 75-100% T1 (part thickness) D1 125-400% T1 (part thickness) D1 100-300% T1 (part thickness) Part Thickness 1.6 mm R > 1 mm (0.040") % Shrinkage Parallel to Flow 4.0-4.5 % Shrinkage Perpendicular to Flow 4.3-4.8 T3 100-200 % (part thickness)arrow_forward
- Granule strength is very important in pressing powders. The force applied to a granule with a radius of 1 mm is 0.5 Newton. Calculate the breaking strength of the granule. b) It is observed that the pressed granules break easily during pressing. Write down the reasons of this situation and what would you take precations to solve this problem? Why? (please write down 3 precautions with reasons). odluckarrow_forwardHot isostatic pressing can be done without a can to get rid of porosity, but what needs to be done before the hot isostatic pressing to make the can unnecessary?arrow_forwardHighlighting the positive pattern making allowances, explain in detail with a neat sketch and labelling the same, the 2-box molding procedure for the following component considering it as a split pattern. Through Hole (a)arrow_forward
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