two types of
pipe corrugator: Internal blow
moulding Vacuum
formingBlow Moulding:
This technology consist of blowing low pressure (0,**1,5 bar)
through the die head spider into the center of the continuously
extruded hot plastic tube. The air is retained by a plug with
metallic or silicone washers.
The hot plastic material is expanded by the internal air pressure
against the corrugation machined in the mould blocks which chill
and holds the tube against the moulds to provide the desired
geometry. Corrugated products formed by internal air must have
constant I.D. dimension. Vacuum forming:
This technology consists of pulling the hot plastic tube against
the mould blocks by vacuum suction applied through the moulds
applied to the plastic tube outside diameter surface. Vacuum from
the moulds keep the tube against the moulds to provide the
desired geometry. Corrugated products formed by vacuum may have
variable I.D. dimensions. Applications
cable wire protection (in the building, telecommunications
and car industry))
