Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 19, Problem 47SDP
Explain the design considerations involved in replacing a metal beverage can with one made completely of plastic.
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Chapter 19 Solutions
Manufacturing Engineering & Technology
Ch. 19 - What are the forms of raw materials for processing...Ch. 19 - What is extrusion? What products are produced by...Ch. 19 - Describe the features of an extruder screw and...Ch. 19 - How are injection-molding machines rated?Ch. 19 - What is (a) a parison, (b) a plastisol, and (c) a...Ch. 19 - How is thin plastic film produced?Ch. 19 - List several common products that can be made by...Ch. 19 - What similarities and differences are there...Ch. 19 - Explain the difference between potting and...Ch. 19 - What is thermoforming?
Ch. 19 - Describe runner, gate, sprue, and well.Ch. 19 - Describe the advantages of cold-forming plastics...Ch. 19 - What are the characteristics of filament-wound...Ch. 19 - Describe the methods that can be used to make...Ch. 19 - What is pultrusion? Pulforming?Ch. 19 - How are very thin plastic film produced?Ch. 19 - What process is used to make foam drinking cups?Ch. 19 - If a polymer is in the form of a thin sheet, is it...Ch. 19 - How are polymer fibers made? Why are they much...Ch. 19 - What are the advantages of coextrusion?Ch. 19 - Explain how latex rubber gloves are made.Ch. 19 - Describe the features of a screw extruder...Ch. 19 - Explain why injection molding is capable of...Ch. 19 - Prob. 24QLPCh. 19 - Explain the reasons that some plastic-forming...Ch. 19 - Describe the problems involved in recycling...Ch. 19 - Can thermosetting plastics be used in injection...Ch. 19 - Inspect some plastic containers, such as those...Ch. 19 - An injection-molded nylon gear is found to contain...Ch. 19 - Explain why operations such as blow molding and...Ch. 19 - Prob. 31QLPCh. 19 - Typical production rates are given in Table 19.2....Ch. 19 - What determines the cycle time for (a) injection...Ch. 19 - Does the pull-in defect (sink marks) shown in Fig....Ch. 19 - What determines the intervals at which the...Ch. 19 - Identify processes that would be suitable for...Ch. 19 - Identify processes that are capable of producing...Ch. 19 - Inspect several electrical components, such as...Ch. 19 - Inspect several similar products that are made of...Ch. 19 - What are the advantages of using whiskers a...Ch. 19 - Construct a table that lists the main...Ch. 19 - Estimate the die-clamping force required for...Ch. 19 - A 2-Iitcr plastic beverage bottle is made by blow...Ch. 19 - Consider a Styrofoam drinking cup. Measure the...Ch. 19 - In Fig. 19.2, what flight angle, , should be used...Ch. 19 - Make a survey of a variety of sports equipment,...Ch. 19 - Explain the design considerations involved in...Ch. 19 - Give examples of several parts suitable for insert...Ch. 19 - Give other examples of design modifications in...Ch. 19 - With specific examples, discuss the design issues...Ch. 19 - Die swell in extrusion is radially uniform for...Ch. 19 - Inspect various plastic components in a typical...Ch. 19 - It is well known that plastic forks, spoons, and...Ch. 19 - Prob. 55SDPCh. 19 - Make a survey of the technical literature, and...Ch. 19 - Prob. 57SDPCh. 19 - Prob. 58SDPCh. 19 - Prob. 59SDPCh. 19 - Examine some common and colorful plastic poker...Ch. 19 - Obtain different styles of toothpaste tubes,...Ch. 19 - By incorporating small amounts of blowing agent,...
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- An injection molded polyethylene part has a dimension of 6.25 cm. A new material, polycarbonate, is used in the same mold. What is the expected corresponding dimension of the polycarbonate molding?arrow_forwardReview Problems The extrusion die for a polyethylene parison used in blow molding has a mean diameter of 18.0 mm. The size of the ring opening in the die is 2.0 mm. The mean diameter of the parison is observed to swell to a size of 21.5 mm after exiting the die orifice. If the diameter of the blow molded container is to be 150 mm, determine (a) the corresponding wall thickness of the container and (b) the wall thickness of the parison.arrow_forward3. A dimension of 225.00 mm is specified for a particular injection moulded component manufactured in ABS. Calculate the corresponding dimension to which the mould cavity should be machined, using the value of shrinkage given in the table below. Typical values of shrinkage for moldings of selected thermoplastics. Shrinkage, mm/mm (in/in) Shrinkage, Plastic Plastic mm/mm (in/in) ABS Polyethylene Polystyrene 0.006 0.025 Nylon-6,6 Polycarbonate 0.020 0.004 0.007 PVC 0.005arrow_forward
- What laws of thermodynamics applicable to the compression molding machine concept? Explain.arrow_forward7) You are working on design improvements for a set of " diameter gears for a children's toy, and are considering material; they are currently made from stamped steel. You are now considering plastic gears. List 6 concerns you would discuss with your polymer/injection molding specialist. List any design. requirements you assumearrow_forwardThe use and applications of plastics in our everyday life cannot be denied. Identify and discuss three specific properties of plastics that has led to their applications in the following fields: (i) Construction (ii) Transportarrow_forward
- The extruder head in a fused-deposition modelling (FDM) setup has a diameter of 1.25mm and produces layers that are 0.25mm thick. If the extruder head and polymer extrudate velocities are both 40 mm/s, estimate the production time for the generation of a 38mm solid cube. Assume that there is a 10-second delay between layers as the extruder head is moved over a wire brush for cleaning.arrow_forwardA thin steel disk of an oil separator of 100mm outside diameter is shrunk onto a solid steel shaft of 20mm diameter. The system is to be designed to make sure the disc does not become loose at speeds lower than 100000rev/min. Determine the shrinkage allowance required in order to avoid separation disc and shaft, at a speed of 100000rev/min. For the material assume a Young's Modulus, Poisson Ratio and density of 210GPa, 0.3 and 7850kg/m³ respectively.arrow_forwardLenora Manufacturing company is planning to market enamel cups. After conducting extensive market surveys, the research department provides the following estimates: a monthly demand of 200 cups at a price of $16 per cup and a monthly demand of 300 cups at a price of $14 per cup. The financial department estimates that monthly fixed costs will be $1,400 and variable costs (cost per unit) will be $4. (a) Assume that the relationship between price p and demand x is linear. Use the research department's estimates to determine the Lenora's price-demand function, p(x). (b) What would be the price per cup for an order of 260 units? (c) Find the revenue function, R(x). (d) Find the maximum revenue that the company can realize, stating the number of books that must be sold to obtain this highest revenue. (e) Assume that the cost function is linear. Use the financial department's estimates to find the cost function,C(x). (f) Find the profit function, P(x). (g) Determine, algebraically, the…arrow_forward
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