Mould Technology 01-09-2020

The purpose of preheating of Preforms is to ________.

• reduce weight

• increase hardness

• remove moisture

• heat fast

In compression moulding the mould temperature ranges from _________.

• 100-250˚C

• 130-350˚C

• 100-200˚C

• 200-450˚C

This final cure time for a very small thin walled part in compression moulding is as low as _____________.

• 10 seconds

• 20 seconds

• 30 seconds

• 40 seconds

The process of heating and compressing the preform material in to the mould is ___________.

• Blow moulding

• Transfer moulding

• Injection moulding

• Compression moulding

In compression moulds, polymerization of plastic takes place in _____________.

• machine

• mould

• material

• hopper

The plastic used in compression molding is __________.

• thermoset plastic

• thermoplastic

• PMMA

• PVC

Thermoset Plastic parts are manufactured by __________ process.

• Compression moulding

• Blow moulding

• Rotational moulding

• Extrusion

In Compression mould the entrapped air is released by _____________.

• hand

• degassing

• hole

• compressure

Externally landed positive mould is also called as _______________.

• Open flash mould.

• Horizontal flash mould.

• Vertical flash mould.

• Semi positive mould.

Internally landed positive mould is also called as ________________.

• Open flash mould.

• Horizontal flash mould.

• Vertical flash mould.

• Semi positive mould.