Single Screw Extruder

Siemens PLC Control System

High Efficiency Screw / Barrier Zone

Solid channel:

Channel depth changes with plasticizing precess, plasticized  material overflow into liquid channel through the gap between screw dam flight and barrel.

Liquid channel:

Melt pressure is lower, melt temperature increasing slower
Shearing & Mixing Zone

Shearing and mixing zone:

Highly mixing of residual solid scraps and melt material

Die Head

■ Extrusion head with spiral structure, make sure the melt in side distributed evenly so as to achieve best plasticization.
■ Calibrator design with water ring which is easy to clean, to achieve bettercooling and then fast forming

Vacuum Tank

Advanced pipe line layout design and adjustable spray angle for better cooling effect, dense pipe line in the first zone for fast cooling.

Flowmeter
Accurate control for calibrator’s
water supplement.

Pressure Protection System
Automatically and manually adjust
vacuum tank internal pressure

Water Level Control
Point-contact floating ball for
water level control.

Puissant Precool Ring
Puissant precool ring set in the
entrance of vacuum tank, brings
good cooling effect when pipes
move into the vacuum tank.

S.S. Semicircle Sliding Plate
Pipe supporting adopts S.S.
semicircle sliding plate, high
intensity supporting.

Gas, Water Separator
Avoid air flow back pressure
affecting other pipelines.

Turbine Screw Lifter
4 directions convenient
adjustment, turbine lifter
adjustment for up & down,
pulley adjustment for left & right.

Temperature Control Drainage
Danfoss expansion valve
temperature-controlled
drainage.

Water Inflow control
Both automatically and manually
for appropriate water level.

Haul-off Unit

For the different pipe size and different speed requirement, Grace developed kinds of haul-off unit accordingly.
Optional to choose multi-caterpillar haul-off unit with wide speed range.

Each caterpillar is controlled
by independent motor,
optional servo motor guarantee
speed uniformity.

Equipped with chain off and
nylon baffle, which adopts ultrahigh
PE material, to prevent the
damage from rubber block slack
and off tracking.

Different quantity caterpillar
shift, high friction rubber.

Cutter

Cutter is synrhonizedly controlled by servomotor to make sure precise cutting length.

Universal clamp

Coiler

40 Type Single/Double Station Coiler
63 Type Single/Double Station Coiler
110 Type Single Station Coiler

Grace offers different solutions according to
different required speed.
Siements PLC automatic operation mode.