Extrusion 1-2016

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23 Extrusion 1/2016
Sica SpA
Via Stroppata 28, 48011 Alfonsine (RA)
Italy
Like PVC-U pipes, the most suitable
joint system for PVC-O pipes is a sok-
ket SICA, manufacturer of plastic pipe
machinery, in 1998 patented
(EP0930148) and developed a unique
socket thermoforming process for PVC-
O pipes. SICA’s patented system is cha-
racterized by forming and internal cali-
bration of the socket on a metal man-
drel. The heated pipe end is inserted on-
to the metal forming mandrel when the
final thermal state of wall-thickness is
uniform but varies longitudinally along
the pipe. The precise final thermal state
is attained through conductive heat
transmission, without variation of the pi-
pe end diameter. In addition to the pro-
cess, the equipment is also protected by
patent, in particular the constructive
configuration of the contact oven, which
achieves a stable and repeatable final
heating. The sockets obtained have pre-
cise internal dimensions and a perfectly
flat edge, shaped by a sliding flange on
the mandrel. Thus, no further processing
of the edge is required after the socket
forming.
SICA belling machines, called STARBELL,
are particularly suitable for direct installa-
tion in extrusion lines. To date, SICA has
sold 19 Starbell machines and over 100
forming mandrels, thus achieving vast
experience in the field.
There are three models of STARBELL
belling machines:
• STARBELL 250 for pipes up to a maxi-
mum diameter of 250 mm,
• STARBELL 500 for pipes up to a maxi-
mum diameter of 500 mm,
• STARBELL 630 for pipes up to a maxi-
mum diameter of 630 mm.
The machines are also suitable for stand-
alone installation in PVC-O lines.
The technical and commercial success of
the STARBELL machines surely lies in
their reliable and repetitive working pro-
cess, in their user-friendliness and in their
strong and robust design configuration.
PVC-O Muffenformmaschine für Rohre bis zu 250 mm Durchmesser
PVC-O belling machine up to 250 mm