Manufacturing Engineering & Technology
7th Edition
ISBN: 9780133128741
Author: Serope Kalpakjian, Steven Schmid
Publisher: Prentice Hall
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Chapter 20, Problem 33SDP
A manufacturing technique is being proposed that uses a variation of fused-deposition modeling, in which there are two polymer filaments that are melted and mixed prior to being extruded to make the part. What advantages does this method have?
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Chapter 20 Solutions
Manufacturing Engineering & Technology
Ch. 20 - What is the basic difference between additive...Ch. 20 - What is stereolithography?Ch. 20 - What is virtual prototyping, and how does it...Ch. 20 - What is fused-deposition modeling?Ch. 20 - Prob. 5RQCh. 20 - Prob. 6RQCh. 20 - Explain what each of the following means: (a) 3DP,...Ch. 20 - What starting materials can be used in...Ch. 20 - What are the cleaning and finishing operations in...Ch. 20 - Which rapid-prototyping technologies do not...
Ch. 20 - What are the advantages of electron beam melting?Ch. 20 - What is the Keltool process?Ch. 20 - What is a self-replicating machine?Ch. 20 - Which rapid-prototyping operations can produce...Ch. 20 - Which rapid-prototyping operations can produce...Ch. 20 - How can a mold for sand casting be produced using...Ch. 20 - Examine a ceramic coffee cup and determine in...Ch. 20 - How would you rapidly manufacture tooling for...Ch. 20 - Explain the significance of rapid tooling in...Ch. 20 - List the processes described in this chapter that...Ch. 20 - Few parts in commercial products today are...Ch. 20 - Can rapid-prototyped parts be made of paper?...Ch. 20 - Careful analysis of a rapid-prototyped part...Ch. 20 - Why are the metal parts in three-dimensional...Ch. 20 - Make a list of the advantages and limitations of...Ch. 20 - In making a prototype of a toy automobile, list...Ch. 20 - Using an approximate cost of 400 per gallon for...Ch. 20 - The extruder head in a fused-deposition modeling...Ch. 20 - Using the data for Problem 20.28 and assuming that...Ch. 20 - Rapid-prototyping machines represent a large...Ch. 20 - One of the major advantages of stereolithography...Ch. 20 - A manufacturing technique is being proposed that...Ch. 20 - Identify the rapid-prototyping processes described...Ch. 20 - Design a machine that uses rapid-prototyping...Ch. 20 - Because of relief of residual stresses during...Ch. 20 - Prob. 37SDPCh. 20 - Prob. 39SDPCh. 20 - Prob. 40SDP
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- Discuss and compare the relationship between structure (molecular orientation)-properties (strength, transparency)-processing for plastic film fabricated using cast film extrusion versus blown film extrusionarrow_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_forwardWhat are the main parameters that influence the flow of a polymer in an extrusion process? Explain this for 3D FDM printing as well as injection moulding and discuss similarities and differences.arrow_forward
- What is Blow molding process? Describe extrusion blow molding and injection blow molding. What are the advantages of multilayer blow molding?arrow_forward1. Injection Molding The gate and runner system that you use to move plastic into an injection molding cavity are critical design parameters. Suppose the polymer material that you are using has a viscosity μ of 950Ns/m² under your processing conditions. Suppose your initial gate and round runner system is 3.5 mm in diameter and approximately 25 mm long. Your part has a volume of approximately 20000 mm³ and a projected area of approximately 1800 mm². Your Engel machine claims that it can melt and deliver material at a rate of 165 cm³/sec. Assume that there is no pressure loss between the mold cavity and the runner system, and none of the clamping force is lost in deforming the molds when they come together. (a) What is shortest injection time for the part? (b) Recall that the equation for Newtonian flow through a round channel is: Pr4 8μL where Q is the flow (m³/s), P is the pressure change (Pa), r is the radius of the channel (m), u is viscosity (Ns/m²), and L is the length of the…arrow_forwardIn additive manufacturing Briefly Describe the General Process and Printing Method of 3D Printing? and Compared with The Conventional 3D Printing? and What Is the Difference Between 3D Color Printing Bindersarrow_forward
- An 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_forwardHow can acoustic-assisted 3D printing be used for precise manufacturing of intricate microscale structures?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_forward
- please show steps and fomulas so I can understand approacharrow_forwardAn 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?arrow_forwardSintering of ceramics may exhibit the following characteristics: Select one or more: a. The surface energy of the system increases b. It involves the high-pressure deformation of a pre-existing shape into a new form c. Pores become larger on average d. Pores become smaller e. Parts of the material may become amorphous f. The total surface area (including internal area) decreasesarrow_forward
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What is Rapid Prototyping?; Author: Formlabs;https://www.youtube.com/watch?v=-TDn25K-Jh4;License: Standard youtube license