Explain how a designer selects between a permanent and a temporary method of joining two components, referring to strength, appearance, servicing and end of...

Assessment: Design & Technology: Product Design 9252 | Paper 1 Mock 01 | Technical, designing and making principles Subject: Design & Technology: Product Design - 9252

Question 1 Report

9252-p1-selection-permanent-temporary-1

Explain how a designer selects between a permanent and a temporary method of joining two components, referring to strength, appearance, servicing and end of life. [4]

Answer Details

The joining method depends on the required balance between performance during use and access later in the product's life.

  • A permanent joint, such as welding or adhesive, can spread load over a wide area and leave no visible fixings, producing a strong and clean-looking result [1].
  • A temporary joint, such as a screw or bolt, is a local fixing that concentrates stress and is usually visible [1].
  • Servicing favours a temporary joint because it can be opened, repaired and reassembled. A permanent joint normally has to be destroyed to gain access [1].
  • At end of life, a temporary joint allows components and materials to be separated for recycling. A permanent joint can leave a mixed-material assembly that is harder to recycle [1].

Permanent does not mean universally better: it is chosen where a neat, strong sealed assembly matters more than disassembly.

Read lesson note on Selection Of Materials And Components (OxfordAQA)
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