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1.The first stage is SHJ twin screw extruder without die.Through the combination of barrel and screw, the extruder can exert its EPT ability to make the thermo sensibility material like PVC melting, compounding,dispersing and decentralizing under the condition of no back pressure
2.The second stage is SJ single screw extruder.Because of the lower rotating speed, it can complete melting,compounding lengthways and forming srands steadily, avioding over heating.
|Model||Screw diameter||L/D||Rotary rate||Motor power||Output|
Two stage air cooling extruders
Combine the high speed and extensive mixing of processing and the low speed, low temperature, and low shear of single screw processing;
Ideal for compounding of heat and shear-sensitive materials.
PVC compounds for cable, shoe sole, transparent container, and medical applications EVA shield cable compounds;
Carbon black master batches of PE, EVA, etc.
Detailed data for SP75-180:
1) Screw diameter: 71mm. L/D = 32
2) Main drive motor: AC 110Kw, Speed regulated by ABB transducer imported from Switzerland.
3) Screw rotary speed: 50~500rpm
4) The barrels are equipped with bimetallic liners (45#steel+α101), processing heat treatment. HRC=60~62. The material of screw elements is high-speed steel 38CrMoAlA, nitrogen treatment. HRC=58~60.
5).The 1st barrel is the main feeding vent, the 6th is for degassing, 9th is vacuum section , and the others are closed barrels.
6)Casting copper heaters for 2-3th barrels. The others are equipped with casting aluminum heaters. All heating power: ~50kw.
The extruder figure:
|1||2||3||4||5||6||7||8||Hydraulic screen changer
7) Reducing and distributing gearbox:
The gearbox reduces the motor speed to the speed of the screw shafts and distributes it to the two output shafts. This gearbox output torque can reach 4.8T/A3
The gearbox consists of:
l Involute gear teeth couplings between the output shafts and screw shafts
l Integrated thrust bearing assembly, radial bearings of the output axis are NSK products
l Bottom part of casing designed as oil sum
8) Soft water cools the barrels with condenser.
Material of input and output pipes is stainless steel.
Solenoid valve: imported products.
Manual valve: stainless steel.
The water pump motor in the soft water system is 0.55kw.
The soft water is distilled water.
2.Single extruder SJ-180/85-90-22
1)180mm; L/D = 28, rotary speed is 6~65rpm.
2)Main drive motor: AC 90Kw. ABB transducer,.
3)The material of barrels and shafts is nitride steel (38CrMoAlA).
4)Water-cooling inside the core of shafts.
5)Casting aluminum heaters, All heating power: ~36kw
6Enlarged screen changer , material through 72 hours’ nitrogen treatment . The channel is short, with little melt left and easy to clean.
7)Tailor-made flange:connect the single and twin screw extruder.
The use of original equipment manufacturer’s (OEM) part numbers or trademarks , e.g. CASE® and John Deere® are for reference purposes only and for indicating product use and compatibility. Our company and the listed EPT parts contained herein are not sponsored, approved, or manufactured by the OEM.