Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 19, Problem 10RQ
What is thermoforming?
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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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- Fully describe the VARTM process with carbon fiber reinforced epoxy as the example. Include all tooling requirements, materials and equipment for production and post-processing. Describe advantages and disadvantages of this method and where it would be used in place of another competing process. Sketch & label a cross-section of the process.arrow_forwardWhat are some things to take into consideration when injection-molding long, thin parts?arrow_forward[0]: What is the cooling curve for both metals and plastics?arrow_forward
- What is the main property of a biomaterial?arrow_forwardThe parting line in injection molding is which one of the following: (a) the lines formed where polymer melt meets after flowing around a core in the mold, (b) the narrow gate sections where the parts are separated from the runner, (c) where the clamping unit is joined to the injection unit in the molding machine, or (d) where the two mold halves come together?arrow_forwardWhat are the roles of heat, pressure, and moisture in the process used to makecorrugated fiberboard?arrow_forward
- What are the benefits of using a chain in place of a rope? What are the concerns about dropping an item using a chain in place of a rope?arrow_forwardWhat are the harmful effects of Misfueling?arrow_forwardImpregnation refers to which of the following; O None of the mentioned O Something that should not happen in a factory Filling the pores of the PM part with a molten metal Putting polymers into the pores of a PM part *arrow_forward
- Thermal plastics are stronger than thermoset plastics.arrow_forwardHow are biomaterials made?arrow_forwardBased on the table below, which of the statements below is/are correct regarding the 3D printing process shown in the schematic? Table 15.2 Melting and Glass Transition Temperatures for Some of the More Common Polymeric Materials Z AXIS a. C. Ⓒ e. A X AXIS B Y AXIS LEGEND: A: Extruder B: Nozzle C: Printed part D: Hot plate E: Filament Material Polyethylene (low density) Polytetrafluoroethylene Polyethylene (high density) Polypropylene Nylon 6,6 Polyester (PET) Poly(vinyl chloride) Polystyrene Polycarbonate Glass Transition Temperature [°C (°F)] -110 (-165) -97 (-140) -90 (-130) -18 (0) 57 (135) 69 (155) 87 (190) 100 (212) 150 (300) You can produce a room-temperature non-fragile 225C oven-safe food container with at least one material from the above table using this process and a 280C nozzle b. This process is best suited for the low volume production of tubes, bars and beams due to the nature of the extrusion process Manufacturing a thermoplastic HDPE hose with an extrusion nozzle…arrow_forward
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