Design For Disassembly DfD

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Design For Disassembly (DfD)

• By Tim Thorn

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The Agenda

• What is Design for Disassembly (DfD)?
• Brainstorming exercise
• Explanation
• How DfD works?
• An Example of DfD
• A brief exercise
• Summary
• Readings

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Design For Disassembly

• Definition The use of assembly methods and
  configurations that allow for cost-effective
  separation and recovery of reusable components
  and materials.

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Brainstorming Exercise

• How can Design for disassembly be applied to our
  organization to increase environmental awareness
  and cut costs?

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Further Information about DfD
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Reasons for Disassembly

• Enable maintenance
• Enhance serviceability
• End-of-life (EOL) objectives such as product
  reuse, remanufacture, and recycling

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End-Of-Life Objectives

• Most important reason to disassemble
• Component reuse
• Remanufacture
• Recycling

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Types of Disassembly

• Destructive disassembly
• Reverse Disassembly
• Two types of reverse disassembly
• Total
• Selective

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Cost-Savings with Disassembly

• Better selection of materials
• More specific identification of component
  materials
• Assembly methods that provide for more efficient
  and possibly automated disassembly

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Benefits of DfD

• Components which are of good quality can be
  refurbished or reused.
• Metallic parts can be separated easily into
  categories which increases their recycling value.
  
• Disassembled plastic parts can be easily removed
  and recycled.
• Parts made from other material such as glass or
  hazardous material can easily be separated and
  reprocessed.

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So how does Disassembly work?

• Product is reacquired
• Product taken to special DfD facilities
• Each component of the product is taken off
• The components are sorted
• Then reused, recycled and refurbished

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How can products be designed more effectively to
aid disassembly?

• Provide ready access to parts, fasteners, etc. to
  support disassembly.
• Design modular products to enable modules to be
  disassembled for service or re-use.
• Minimize weight of individual parts and modules
• Crow Kenneth. http//www.npd-solutions.com/dfe.htm
  l
• Crow Kenneth. http//www.npd-solutions.com/dfe.htm
  l

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Effective Design (Cont.)

• Use joining and fastening techniques to
  facilitate disassembly (e.g., fasteners instead
  of adhesives)
• Minimize fragile parts and leads to enable re-use
  and re-assembly.
• Use connectors instead of hard-wired connections.
  
• Design to enable use of common hand tools for
  disassembly.
• Crow Kenneth. http//www.npd-solutions.com/dfe.h
  tml

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What industries use DfD?

• Construction
• Technology
• Furniture Manufacturing
• Electronic Manufacturing
• Automobile Manufacturing

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Real world application

• Cell Phone Manufactures
• Initially too costly to disassemble
• Use of DfD
• Phones will soon take seconds to disassemble

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Exercise

• What is Desgin for Disassembly?
• Why do we use DfD?
• What can be designed more effectively to aid in
  disassembly?
• What industries use DfD?

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Summary

• By designing products that are easy to
  disassemble we can conserve natural resources,
  and if applied correctly can cut costs.

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Readings List

• Billatos, S.B. 1997, Green Technology and Design
  for the Enviroment.
• Desai, Anoop. Mital,Anil Journal of Manufacturing
  Technology Management 2005, Vol. 16 Issue 7,
  p712-732, 21p
• Dowie-Bhamra, Tracy. University of Manchester
  http//www.co-design.co.uk/design.htm
• Jana, Reena. Business Week Online Can Design
  Change the World? 10/26/2006
• Crow, Kenneth. http//www.npd-solutions.com/dfe.ht
  ml