EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 9780100793439
Author: KALPAKJIAN
Publisher: YUZU
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 19, Problem 43QTP
A 2-Iitcr 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.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A 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.
)Design a two-plate mould for the plastic product as shown in Figure with clearlyshowing the feeding system, cooling system and ejector system.
An extruder barrel has a diameter of 110 mm and a length of 3.0 m. The screw channel depth = 7.0 mm, and its pitch = 95 mm. The viscosity of the polymer melt is 105 Pa-s, and the head pressure in the barrel is 4.0 MPa. What rotational speed of the screw is required to achieve a volumetric flow rate of 90 cm3/s?
Chapter 19 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
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,...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Explain the extrusion blow molding in detail.arrow_forwardAn extrusion operation produces continuous tubing with outside diameter = 5 cm and inside diameter = 4.25 cm. The extruder barrel has a diameter = 10 cm and length = 3 m. The screw rotates at 50 rev/min; it has a channel depth = 0.63 cm and flight angle = 16°. The head pressure has a value of 2.5 MPa and the viscosity of the polymer melt is 55 Pa-s. Under these conditions, what is the production rate in length of tube/min, assuming the extrudate is pulled at a rate that eliminates the effect of die swell (i.e., the tubing has the same OD and ID as the die profile)?arrow_forwardWhat is Blow molding process? Describe extrusion blow molding and injection blow molding. What are the advantages of multilayer blow molding?arrow_forward
- Question 3 The diameter of an extruder barrel is 65 mm and its length is 1.75 m. The screw rotates at 55 rev/min. The screw channel depth is 5.0 mm, and its flight (helix) angle is 18°. The head pressure at the die end of the barrel is 5x10° Pa. The viscosity of the polymer melt is given as 100 Pa-s. Calculate the volume flow rate of polymer in the barrel. The drag flow is given by the equation: Qa = 0.5 n2 D² N d̟ sinp cosp The back pressure flow is given by the equation: Pn D dễ sin²o Qb 127L The details of the extruder screw are given in figure 3.1 W. Perpendicular channel width Helix angle (O) Pitch Channel depth de Axial |light| width Axial channel width Perpendicular fight -Direction of mass flow- Figure 3.1. Schematic illustration of a typical "Archimedean" extruder screw. width Root diameter diameterarrow_forwardQuestion 3 The diameter of an extruder barrel is 65 mm and its length is 1.75 m. The screw rotates at 55 rev/min. The screw channel depth is 5.0 mm, and its flight (helix) angle is 18°. The head pressure at the die end of the barrel is 5x10° Pa. The viscosity of the polymer melt is given as 100 Pa-s. Calculate the volume flow rate of polymer in the barrel. The drag flow is given by the equation: Qa = 0.5 n² D² N d̟ sinp cosp The back pressure flow is given by the equation: Pn D dễ sin²4 Qb 127L The details of the extruder screw are given in figure 3.1 W. channel width Perpendicular Pitch Helix ( p angle () D Channel depth de |Axial |light| width Axial channel width Perpendicular flight -Direction of mass flow- Figure 3.1. Schematic illustration of a typical "Archimedean" extruder screw. width Root diameter diameterarrow_forwardAn extruder has barrel diameter and length of 150 mm and 3.1 m, respectively. The screw rotational speed = 55 rev/min, channel depth = 8 mm, and flight angle = 18°. The plastic melt has a shear viscosity = 175 Pa-s. Determine: (a) the extruder characteristic, (b) the shape factor Ks for a circular die opening with diameter = 4.0 mm and length = 15 mm, and (c) the operating point (Q and p).arrow_forward
- 3. 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_forwardQ1arrow_forwardAn 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_forward
- 12) Assuming injection molding pressures of 10kpsi, estimate the die clamping force required for injection molding 10 identical 1.5-in.-diameter disks in one die. Assume runner area is 5.0 in?. Discuss the affects of reorienting the disks.arrow_forwardWhat kind of system is compression molding machine? open, closed, or isolated? Explain.arrow_forwardBriefly explain the Casting and Molding processes and define their basic requirements. If a manufacturer was asked to produce a set of plastic bottles, which method would you suggest?Justify your answer.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University Press
Mechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSON
Thermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEY
Mechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage Learning
Engineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Polymer Basics; Author: Tonya Coffey;https://www.youtube.com/watch?v=c5gFHpWvDXk;License: Standard youtube license