There are many different types of plastic moulding, most of which is manufactured in China. Depending upon which type of plastic moulding is used would determine the way the moulding is fitted.
The resulting moulding with incomplete filling of the plastic resin is called in practice as short moulding.
Cove or crown moulding which is fitted at the junction of a wall and ceiling.
Banter
It is made in factories, usually by injection moulding.
extrusion moulding
Sony makes fitted plastic/vinyl PS3 covers in many different colors.
They're made using plastic injection moulding.
Thermosetting and thermoplastic
Blow moulding is when plastic granules are injected into a mould after being melted, and then compressed air is blown into the mould to hollow it out. This can make shapes like bins and bowls.
tolerance that is needed to keep before the moulding is produced. As part shrinks in size after it is cooled.It depends from plastic to plastic as every plastic has different property.
Plastic cups can be made up of a number of materials, polypropylene, polyethylene, polycarbonate. Depending on the detail required there are also a few manufacturing process that would be appropriate. Injection moulding is good for high levels of detail but is expensive. Rotational moulding is not as precise but alot cheaper.
Elastomers, Thermosetting plastics,Thermoplastics.