Blow Moulding (Leaving Cert Engineering): Flashcards

Process making hollow containers from thermoplastics

Only thermoplastics

Can be reheated & reshaped for inflation

Hollow tube of heated thermoplastic polymer

Two halves that close around parison

Heated parison is created

Parison in split mould, bottom sealed

Air blown in, plastic expands to mould walls

Plastic cools, hardens, mould opens, product out

Consistent thickness from even air pressure

Beverage bottles, food, household & personal care items

Soft drink bottles

Milk bottles & detergent containers