The device is small, high flexibility, no pollution and so on.
Plastic pelletizing extruder is the host system, it consists of extrusion systems, drive systems, and heating and cooling systems. Extrusion system are summarized as follows:
1. Extrusion: extrusion systems including screw and barrel, Hopper, die, and die, plastics by squeezing the plastic into the system of uniform melt, and in the process established by the pressure, screw extrusion heads in a row.
(L) screw: is the most important parts of extruder, which directly relates to the application range of extruders and production efficiency, made from high-strength corrosion-resistant alloy steel. (2) barrel: a seamless metal tubes, generally with higher heat resistance, compressive strength, strong wear-resistant, corrosion-resistant alloy steel composite pipe made of or lined with alloy steel. Barrel and screw fit, realize the plastic pieces, softening, melting and plasticizing, vent and compaction and shaping system • uniform continuous conveying plastic milk-like 18:1 of the barrel length to its diameter, so that the plastic is fully heated and fully plastic into principles.
(3) the hopper: hopper with cut-off device at the bottom, in order to adjust and cut off the flow, side of the hopper with sight and calibration of metering devices.
(4) die and die: die made of alloy steel and carbon steel coat, and head is equipped with mold. Headers are used to rotate the plastic melts into parallel straight line movement, steady import model Kit, and endows plastics with the necessary pressure. Plastic plastic in the barrel of the compaction, porous plate along a certain flow through head neck into head mold, die mandrel set appropriate, formation cross section decreases of the annular space, plastic melt around the wire to form a continuous solid tube coating. In the guarantees head plastic reasonable channel, elimination of accumulated plastic corner, often placed the manifold (sleeve), to eliminate plastic extrusion pressure fluctuations, there is set of grading rings. Head is also equipped with mould correction and adjustment device, easy to adjust and align core and mould sleeve of concentricity. Extrusion machine according to machine head flow direction and angle between the center line of the screw will head into a bevel head (120 degrees) and right angle (90 degrees) nose. Head of shell is with bolt fixed in fuselage Shang, head within of mold has die core sat, and nut fixed in head into line port, die core seat of front with die core, die core and the die core seat of Center has hole, for through core line; in head Qian Department with are pressure ring, for balanced pressure; squeeze package forming part by die sets seat and die sets composition, die sets of location can by bolt through support to regulation, to adjustment die sets on die core of relative location, easy regulation squeeze package layer thickness of uniform sex. Head outside and temperature measuring device equipped with a heating device.