Twin screw extruder unit/underwater granulation

Twin screw extruder unit/underwater granulationThe use of underwater granulation method can optimize particle shape, with smooth and uniform surface, high density, and good fluidity.

Twin screw extruder unit/underwater granulation

1、 Twin screw extruder

1. Production: According to the raw material process formula

2. Temperature range:~300 ℃

3. Temperature accuracy: ± 1 ℃

4. Screw diameter: Φ 20

5. Length to diameter ratio: 40:1 optional

6. Screw rotation: meshing type parallel and in the same direction

7. Screw speed: 0-300rpm variable frequency speed regulation

8. Screw: The core shaft is made of 40CrNiMoA chromium molybdenum alloy tool steel, and the threaded component is made of W6Mo5CR4V2 wear-resistant alloy steel with a hardness of HRC60. It has conveying blocks, mixing blocks, shearing blocks, mixing blocks, and kneading blocks,

Reverse flow block, modular series component, connected to the core shaft with gradually blooming keys, can be combined according to any material ratio to meet different extrusion processes

Process requirements

9. Cylinder body: The 5-section material cylinder is made of 45 # nitride steel forgings, lined with A301 wear-resistant alloy sleeve, with a hardness of HRC60. It has been treated with nitriding, quenching and ultra precision grinding processes, with a surface roughness Ra ≤ 0.4 μ m, wear-resistant and corrosion-resistant

10. Combination method: The screw kit is a modular spiral combination, with a multi-stage combination of the barrel and self-cleaning function

11. Heating zone: cast aluminum heater in zone 5 of the cylinder body, heater in zone 1 of the machine head, with a heating power of 1kw per section, covered with a safety protective hood

12. Cooling zone: The entire section of the cylinder adopts a soft water circulation cooling system, and the flow rate of cooling water in each section can be adjusted. It is equipped with self-priming circulating water pumps, 304 stainless steel water storage tanks, inlet and outlet pipelines, and electromagnetic valves. It can achieve independent temperature control cooling for each section of the cylinder unit

13. Vacuum zone: Water circulation vacuum degassing device, equipped with water ring vacuum pump, vacuum gauge, regulating valve and other components, forming an unobstructed dehumidification and exhaust system

14. Feeding machine: Adopting twin-screw metering type forced feeding, equipped with a horizontal mixer, the feeding is uniform, stable, and not easy to bridge. The feeding speed is adjustable from 0-50rpm by frequency conversion, and a sliding rail type fast discharging device is installed

15. Head pressure: Dynisco high-precision temperature and pressure sensors monitor the temperature and pressure changes of the head melt, interlock control the operation of the host, and have overpressure protection function

16. Head: Cr12 chromium molybdenum alloy head, nitriding hardness HRC60

17. Gearbox: High speed heavy-duty hard tooth gear transmission, integrated structure of gear reduction and torque distribution box, internal transmission components all use imported high load bearings and oil seals, oil immersion splash lubrication, smooth operation