SJ Series Plastic Single Screw Extruder Machine
ISO Standard SJ Series Plastic Single Screw Extruder Machine is
main part of the core operations in polymer processing and is also
a key component in many other processing operations. The foremost
goal of a single screw extrusion process is to build pressure in a
polymer melt so that it can be extruded through a die or injected
into a mold. Most machines are plasticating: they bring in solids
in pellet or powder form and melt them as well as building
pressure.
Single screw extruder is composed of driven motor, gear reducer
box, screw and barrel, casting aluminum heater, cooling blower,
hopper and control cabinet. Single screw extruder working principle
is as following : When the screw turns, it moves the resin within the hotbarrel. In
this way, it reaches the required temperatures as well as mixes
thoroughly to form a melt that is homogenous. The pressure which is
built up by the single screw extruders then forces the melt from
the extruder. It gets out shaped like a die. The whole system has
barrier screw that makes sure that the whole resin does not melt in
basic extrusion screw.
Driven motor: It is main part of single screw extruder. We'd better choose good
brand AC type or DC type driven motor matching with inverter
controll for saving power running cost.
Gear recuder box: It is used for connecting motor and for reducing rotating speed of
screw through size and teeth of gear changing in the gear box.
Screw and barrel: It is most important part of single screw extruder. Design of
single screw is becoming to special and customzied now due to many
different kind plasic materials are using. The surface of screw
should be paint double alloy for anti-wear.
Casting aluminum heater: It is used for heating barrel and screw which ensure plastic resin
material can be plasticizing and melting under the suitable
temperature.
Cooling blower : It is used for cooling barrel and screw. if temperature of screw
and barrel will be excess setting temperature, cooling blowers
start to work for cooling barrel which avoid plastic granule
material resolved in the inside of barrel.
Hopper : It is used for keep the mixed plastic resin material in the silo
and make sure material can be into barrel continuously. It is like
a material transport station.
Control Cabinet: It is used for control whole cornic double screw extruder running
by switchs or PLC programes according to different circuits control
required.
