Abstract:
Previously, material of liquid consistency used
to be packed in ceramic and glass containers or
tinned boxes. The use of laminated paper boxes
has been known as well. Since plastic material
has been developed, the packaging industry has
to an increasing extent used plastic containers to
contain liquid media.
The production of hollow thermoplastic bodies
is a matter for blow-moulding machines. Bottles
with precision threads are produced on conventional
injection blow-moulding machines.
For hollow bodies with head-sections accurate
in dimension and thin-walled bodies of uniform
wall-thickness - such as plastic tubes, bottles,
ampoules, folding bellows and casings - pressblowing
injection blow-moulders are required
which combine no waste injection moulding of
the head section with drawing of the parison
(this means partly formed bottles) subsequent
blow-moulding of the body-section in smooth
transition (patent Ossberger).
