Brief introduction of parallel co-rotating twin-screw extruder


  

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Parallel co-rotating twin-screw extruders are widely used in filling, blending, modification, reinforcement, devolatilization of chlorinated polypropylene and superabsorbent resin of rubber and engineering resin. Extrusion of degradable masterbatch, polyamide polycondensation and polyurethane polyaddition reaction; Granulation of carbon powder and magnetic powder, preparation of insulation material for cables, sheath material, low smoke and low halogen flame retardant PVC cable material and various silane cross-linking materials, etc. Small models are mainly used for scientific research and teaching.

Parallel to the same to the twin-screw extruder screw, barrel using the "building block" structure, has a good interchangeability, according to the different material processing technology, any combination of use,

Corrosion resistance and prolonged service life; The threaded elements are nitrided steel and high-speed steel. The curve adopts computer-aided design and is matched with unique processing technology, thus ensuring the normal tooth surface clearance of the threaded working section and good self-cleaning. The specially designed connection mode and transmission device enhance the strength of the threaded elements and mandrel. The above measures realize uniform material dispersion, good mixing and plasticizing effect and short material retention time, the purpose of high conveying efficiency.

The reduction system adopts a special reduction gearbox for plastic machinery. The transmission parts are made of high-quality and ultra-high alloy carburizing steel, combined with carburizing, quenching and tooth grinding processes. The key parts are added with surface strengthening treatment, tooth surface strength HRC54 ~ 62, core hardness HRC30 ~ 40, and gear grade 6. The system has the characteristics of high speed, high torque and low noise.

Feeding system adopts double screw with agitator quantitative feeding system, feeding uniform, accurate, does not produce shelf phenomenon.

The electric control system adopts imported electrical components, the control panel is man-machine interface, each part of the equipment adopts "module" control (can also be configured according to user requirements), the multi-function module has clear structure, and has safety interlocking devices (such as lubrication pressure loss protection, head pressure protection, overcurrent protection, etc.), which truly reflects the operating conditions of the equipment, has accurate control, high sensitivity and convenient operation.

The heating system adopts cast aluminum, cast copper and ceramic resistance heating device, which is uniform, fast in heating and high in temperature control precision.

The temperature control system adopts a dual-channel temperature control meter, which is sensitive, convenient for temperature setting and adjustment, and has high temperature control accuracy.

The cooling system takes two forms: water cooling, oil cooling, and air cooling. The cooling is rapid, uniform, and effective.

The vacuum system adopts built-in vacuum system, and the vacuum degree can reach -0.09MPa, so as to ensure that the material is fully plasticized and the product quality is improved.

The auxiliary machinery can be equipped with various pelletizing forms such as cold-drawn strip pelletizing, drag chain traction pelletizing, air-cooled die surface eagerness, underwater pelletizing and so on according to different process requirements of users.