Manufacture

Manufacture 2016-12-06T05:35:25+00:00

Manufacture

Description

Process

Uses

Injection Moulding

Molten plastic is injected under high pressure into a cooled, split mould to produce a high precision moulding.

Buckets
Telephones
TV cabinets
Gears
Toys

Blow Moulding

A hot thermoplastic tube is inflated by compressed air into a cooled split-cavity mould to produce a hollow moulding

Bottles
Drums
Carboys
Car fuel tanks

Extrusion

Molten thermoplastic is extruded under high pressure through a shaped die to produce a continuous precision section.

Drain pipe
Guttering
Water pipe
Roofing sheet
Window frame
Wire insulation

Compression Moulding

Thermosetting plastic powder is compressed and heated in a matched die-set to produce a precision moulding

Fuse boxes
Lamp holders
Saucepan handles
Insulators

Rotational Moulding

Thermoplastic powder is tumbled, heated and cooled in a split, hollow mould to produce a hollow mouding of simple shape

Litter bins
Play balls
Traffic bollards

Vacuum Forming

Thermoplastic sheet is heated and forced under vacuum into contact with a cooled form-mould to produce a simple shaped moulding

Yoghurt pots
Vending cups
Fridge linings

Dip Moulding

Temperature controlled mandrels are dipped into a bath of plastic paste or fluidised powder to produce a peelable skin (or durable coating)

Protective-gloves
Balloons
Handle grips

Calendering

Hot thermoplastic is passed through a series of temperature controlled rolls with progressively smaller gaps to produce a continuous precision thin sheet (also embossed, if required)

Protective sheet
Shower curtains
Flexible film

GRP Laminating

Layers of glass fibre matt are laid-up and wetted with a thermosetting resin into a simple mould to produce a large, strong structural moulding

Boats
Car bodies
Chemical plant
Cladding

Structural Foam Moulding (PU)

A two-part premix is introduced into a split cavity mould where it expands to produce a strong, lightweight moulding

Computer housings
Casings

Visit www.pras.com/pras/materials_and_processes/processes to see animated versions of some of the above processes.