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DT Paper 1 Revision > Important flashcards > Flashcards

Important flashcards

1
Q

Properties of Glass reinforced plastic (GRP) (6)

A
  • Lightweight
  • Corrosion resistant
  • Tough
  • Hard
  • Low thermal expansion
  • Good compressive strength
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2
Q

Uses of Glass reinforced plastic (GRP) (5)

A
  • Boat hulls
  • Pond liners
  • Kayak shells
  • sports car bodies and parts
  • Locomotive train cabs
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3
Q

Properties of CFRP (6)

A
  • Lightweight
  • Corrosion Resistant
  • Tough
  • Hard
  • Good compressive strength
  • Low thermal expansion
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4
Q

Uses of CFRP (5)

A
  • Sports equipment such as bicycle frames and tennis racquets
  • Fishing rods
  • Racing Car bodies and parts
  • Helmets
  • Prosthetics
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5
Q

Properties of concrete (4)

A
  • High compression strength
  • Low tensile strength
  • Few surface defects
  • Easy to mould
  • Can be situ or pre fabricated
  • Very stable material
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6
Q

Uses of concrete (5)

A
  • Pathways
  • Beams
  • Blocks
  • Driveways
  • House foundations
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7
Q

Vacuum forming:

  • Polymer stock form
  • Products
A
  • Thermoplastic sheet up to 6mm thickness
  • lightweight trays, box inserts and liners, takeaway coffee cups and yoghurt pots
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8
Q

Key features of vacuum forming (3)

A
  • Moulds are relatively easy to make but need a draft angle, air holes and rounded corners
  • Not cost effective for one-off manufacture
  • Small-scale batch and mass production
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9
Q

Injection moulding:

  • polymer stock form
  • products
A
  • Thermoplastic granules
  • Electrical product casings (computers, TVs, vacuum cleaners, calculators
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10
Q

Key features of injection moulding (4)

A
  • Complex 3D shapes can be easily made
  • Fast industrial production method
  • Used for large-scale mass or production
  • High initial tooling cost
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11
Q

Blow moulding:

  • polymer stock for
  • products
A
  • Thermoplastic tube ‘parison’
  • Drink bottles, shampoo bottles, detergent bottles etc
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12
Q

Key features of blow moulding (3)

A
  • Produces hollow thin-walled components
  • High initial tooling cost
  • Used for continuous production
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13
Q

Rotational moulding:

  • polymer stock form
  • products
A
  • Thermoplastic powder or granules
  • Traffic cones, kayaks, water tanks, kerosene tanks, children’s play equipment
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14
Q

Key features of rotational moulding (3)

A
  • Seamless hollow components with a large wall thickness
  • Mould continuously rotated through heating and cooling
  • Large-scale batch of mass production
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15
Q

Compression moulding:

  • polymer stock form
  • Products
A
  • Thermoset polymer charge ‘slug’
  • Electrical light fittings, switches, plugs, picnic plates and cups
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16
Q

Key features of compression moulding (3)

A
  • Uses a pre-weighed ‘slug’ of polymer
  • Polymer removed from moulds
  • Large-cale batch production
17
Q

Press forming:

  • stock form
  • products
A
  • Sheet
  • Metal seats, car body panels, boxes and containers
18
Q

Spinning:

  • stock form
  • products
A
  • Sheet
  • Body of stainless steel kettles, saucepans, metal light shades
19
Q

Cupping and deep drawing:

  • stock form
  • products
A
  • sheet (round blank)
  • tube-like shapes such as fire extinguishers, aerosol cans, drink cans
20
Q

Drop forging:

  • stock form
  • products
A
  • Billet
  • Spanner’s, pliers and screwdriver shafts
21
Q

Wrought iron forging:

  • stock form
  • products
A
  • Bar
  • Decorative metalwork such as gate scrolls, decorative fencing
22
Q

Key features of wrought iron forging (3)

A
  • Uses wrought iron (carbon content less than 0.08%)
  • Can be hand or hydraulic press process
  • Suitable for one-off or small-batch production
23
Q

Key features of press forming (3)

A
  • Shapes sheet metal into 3D forms
  • Often used in conjunction with robots for lifting sheet into place
  • Suitable for mass production or large-scale batch production
24
Q

Key features of spinning (2)

A
  • Products May show parallel lines where the sheet has been forced onto the mandrel
  • Suitable for small-scale batch production
25
Q

Key features of cupping and deep drawing (4)

A
  • Starts with a metal blank
  • Metal is stretched into shape
  • High initial tooling cost
  • Used for large-scale mass or continuous production
26
Q

Key features of drop forging (4)

A
  • Used for products that need to be tough and hard
  • Maintains the internal grain structure which retains the strength
  • Hot metal billet shaped on an anvil or die and then pressed into shaped and cooled
  • Suitable for mass production

DT Paper 1 Revision (9 decks)

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