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Chapter20ba - Materials Processes in Manufacturing ME 151...

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©2003 Bill Young 1 Materials & Processes in Manufacturing ME 151 Chapter 20 Fabrication of Plastics, Ceramics and Composites ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ©2003 Bill Young 2 Introduction Plastics, Ceramics, and Composites as compared to metals Products are used closer to their design limits Conversion of raw material to final part in a single operation Large complex shapes in a single part eliminating multi-part assembly Color, finish, and precision can often be obtained within the material and/or process Final part properties are typically a combination of material and process Chapter covers the basic processes for: Plastics Fabrication Processing Rubber and Elastomers Ceramics Processing Composite Materials Fabrication ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ©2003 Bill Young 3 Fabrication of Plastics Plastics are natural or synthetic resins, or their compounds, that can be molded, extruded, cast or used as thin films or coatings Specific method used for fabrication depends on the nature of the polymer ____________ - Polymers that can be reheated and hardened repeatedly without a chemical change to the material H eat >> Form to Shape >> Cool to Retain Shape ___________ - Polymers that undergo a permanent structure change and are not reformable (Irreversible chemical change) Heat >> Form to Shape ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________
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©2003 Bill Young 4 Fabrication Processes
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  • Spring '08
  • AlanT.Male
  • Injection molding, sintering, Plastics industry, Bill Young, ___________________________________ ___________________________________

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