MET 34800 – Engineering Materials Chapter 9

MET 34800 – Engineering Materials Chapter 9...

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MET 34800 – ENGINEERING MATERIALS IUPUI ENGINEERING TECHNOLOGY ENT Department
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CHAPTER 9 PLASTIC AND POLYMER COMPOSITE FABRICATION PROCESSES Engineering Materials: properties and selection, 9th ed. Kenneth G. Budinski, Michael K. Budinski
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Upon completion of this chapter, the student should: Understanding the fabrication processes that are used for thermosetting and thermoplastic materials Knowledge of plastic fabrication processes sufficient to allow the selection of a process for a proposed design Understand how to specify a plastic fabrication process Understand recycling’s importance and recycling codes on plastics CHAPTER GOALS The purpose of this chapter to discuss common plastic and polymer composite processes in enough detail that students will understand the theory and some of the “nuts and bolts” of each one. We will also cover recycling and some selection topics.
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Injection molding Blow molding Calendaring Rotational molding Solid phase forming Thermoforming True-foam fabrication Extrusion 9.1 THERMOPLASTIC FABRICATION PROCESSES Thermoplastic fabrication processes are most likely to be of concern or used by material users. Injection molding is widely used and injection- molded objects are used by all of us in our everyday life. Blow-molding is used for containers such as soda bottles. Thermoforming is widely used for packaging of products that we use every day.
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Figure 9–1 Spectrum of forming processes for thermoplastic materials 9.1 THERMOPLASTIC FABRICATION PROCESSES
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Figure 9–2 Injection molding 9.1 THERMOPLASTIC FABRICATION PROCESSES
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Figure 9–3 Blow molding 9.1 THERMOPLASTIC FABRICATION PROCESSES
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Figure 9–4 Calendering 9.1 THERMOPLASTIC FABRICATION PROCESSES
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Figure 9–5 Rotational molding 9.1 THERMOPLASTIC FABRICATION PROCESSES
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Figure 9–6 Solid-phase forming of drawn plastic shapes 9.1 THERMOPLASTIC FABRICATION PROCESSES
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Figure 9–7 Thermoforming 9.1 THERMOPLASTIC FABRICATION PROCESSES
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Figure 9–8 Stereolithography 9.1 THERMOPLASTIC FABRICATION PROCESSES
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Figure 9–9 Extrusion 9.1 THERMOPLASTIC FABRICATION PROCESSES
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9.1 THERMOPLASTIC FABRICATION PROCESSES Summary: Most of these fabrication processes require very expensive equipment. Injection molding, blow molding, or film blowing machine easily can cost in excess of $200,000. Extruders, calenders, and stereolithography machines are similar in cost. Thermoforming can be done with very simple equipment (such as wooden forms, a vacuum cleaner, and an oven).
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MET 34800 – Engineering Materials Chapter 9...

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