DT 9 Flashcards
(30 cards)
State the different Deforming/Reforming Processes (9)
Bending
Sand Casting
Die Casting
Lamination
Vacuum Forming
Blow Moulding
Injection Moulding
Extrusion
Press Forming
Purpose of Deforming/Reforming Processes
Change the shape of materials without removing much material
Bending is used for/tools
Metals and plastics.
Bending bars, formers, or presses.
Sand Casting is used for
Metals like aluminium or brass
Die Casting is used for
non-ferrous metals
Lamination is used for
wood, plywood, chipboard, and even plastic sheets. Makes a strong, lightweight material.
Vacuum Forming is used for
Thermoplastics like HIPS, trays or packaging
Blow Moulding is used for/tools
Plastic bottles
Injection Moulding is used for/tools
Thermoplastics
Extrusion is used for/tools
Metals and plastics.
Press Forming is used for/tools
Sheet metal
Purpose of Wastage/Addition Techniques
Remove material (wastage) or join materials (addition) to make the final shape.
State the Cutting and Removal Tools (5)
Hand snips
Saws
Files
Planes
Abrasive cutters
Use of Hand snips
Cut thin sheet metal.
Use of Saws
Hand saw, hacksaw, coping saw for wood, metal, plastic
Use of Files
Smooth and shape materials.
Use of Planes
Shave wood to flatten or shape it.
Use of Abrasive cutters
Disks that grind or cut through materials.
State the Hole Making Techniques (5)
Pilot hole
Clearance hole
Tapping
Countersunk hole
Counterbored hole
Pilot hole technique
Small hole to guide a larger drill
Clearance hole technique
Bigger than the screw so it passes through.
Tapping technique
Makes internal threads for screws (inside a hole).
Countersunk hole technique
Allows a flat-head screw to sit flush.
Counterbored hole technique
Allows a bolt head or nut to sit below surface.
