Homework Set 1 17.33: Estimate the maximum tonnage required to compact a brass slug 3.0 inches in diameter. Would the height of the slug make any difference in your answer? Explain your reasoning. 17.34: Refer to Fig. 17.11a. What should be the volume of loose, fine iron powder in order to make a solid cylindrical compact 25 mm in diameter and 20 mm high? 17.35: Determine the shape factors for (a) a cylinder with a dimensional ratio of 1:1:1 and (b) a flake with a ratio of 1:10:10. Homework Set 2 18.19: Describe the differences and similarities in processing metal powders vs. ceramics. 18.21: Explain why ceramic parts may distort or warp during drying. What precautions should be taken to avoid this situation? 18.30: Using Example 18.1, calculate (a) the porosity of the dried part if the porosity of the fired part is to be 9% and (b) the initial length, Lo, of the part if the linear shrinkages during drying and firing are 8 and 7%, respectively. 18.31: What would be the answers to Problem 18.30 if the quantities given were halved? Homework Set 3 19.27: Can thermosetting plastics be used in injection molding? Explain. 19.28: Inspect some plastic containers, such as those containing talcum powder, and note that the integral lettering on them is raised rather than depressed. Explain. 19.36: Identify processes that would be suitable for small production runs on plastic parts of, say, 100. 19.42: Estimate the die-clamping force required for injection molding five identical 8- inch-diameter disks in one die. Include the runners of appropriate length and diameter. 19.43: A 2-liter plastic beverage bottle is made by blow molding a parison 5 in. long and with a diameter that is the same as that of the threaded neck of the bottle. Assuming uniform deformation during molding, estimate the wall thickness of the tubular portion of the parison.