The blow moulding process


our shops and supermarkets are filled

with products that are packaged and

plastic produced using blow molding

techniques the plastic blow molding

process is the most popular method used

to produce hollow containers impact uses

a variety of raw material during the

blow molding process depending on the

container application and its expected

performance the raw material in granular

form is fed via a hopper into the feed

barrel which is heated to help melt the

granule and evenly disperse the colorant

called master batch a molten tube of

plastic called a paracin is extruded

from the machine head and cut with a hot

blade it is then captured by a

water-cooled mold and a blowing nozzle

is inserted into the paracin a blast of

pressurized air is blown into the

paracin forcing the hot plastic to take

on the shape of the mold this process is

called blow molding once cooled and

solidified inside them all the machine

opens the mold and the brand-new

container is ejected the container is

transferred to a d flasher that removes

the excess known as the tail this excess

is conveyed to the beginning of the

process to be ground and reuse

this is known as a closed-loop system


once the jars leave the machines they

are then conveyed to a trimmer which

removes the remaining excess called the

lust head which in turn is collected and

added to the closed-loop system with the

tail and last head removed the plastic

jar or container is now in its final

form bottles are subjected to a leak

test whereby controls air flow is

released into the bottle should the

bottle contain any leak related defects

the pressurized air will escape and the

bottle will be rejected this bottle will

then be introduced back into the

closed-loop system the containers are

now ready to be packaged and sent on to

the manufacturers of the products who

will fold the new container