Homework Set 1 17.33: Estimate the maximum tonnage required to compact a brass slug 3.0 inches...

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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. 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.