What are the shortcomings of domestic twin-screw granulators at present? Which granulation experimental machine is good?

At present, the shortcomings of domestic twin-screw granulator:

1. It is troublesome to clean the equipment, it is difficult to replace the color masterbatch, and the maintenance cost is high;

2. The twin-screw combination has a gap, so the self-cleaning ability is poor and the mixing effect is poor;

3. The motor and transmission box make the torque output unstable, the equipment runs unsteadily and the output is low;

4. The screw is poor in material, wear-resistant and easy to break;

5. There is no vacuum vent, and the equipment has limited adaptive materials;

POTOP Guangzhou ordinary small twin-screw granulator has the following advantages, which can make up for the above shortcomings.

(1) The barrel can be disassembled, and the screw and liner in the barrel can be arbitrarily combined. Because the machine barrel can be opened quickly, the wear condition of wearing parts can be understood intuitively, which is convenient for cleaning materials and changing colors and improving work efficiency.

Split barrel

(2) The tooth profile of the threaded element of this equipment is optimized by computer, which has good self-cleaning ability and the best mixed plasticizing ability.

(3) This equipment can be combined with one-stage, two-stage or multi-stage vacuum exhaust structure, which has strong exhaust devolatilization ability and can complete various high devolatilization mixing operations.

(4) The threaded elements are made of high-quality alloy tool steel, and the working surface is hardened, which is suitable for all kinds of mixing operation requirements. For general operation, the barrel can be made of nitrided steel; For operations requiring high wear resistance and corrosion resistance, bimetallic cylinder with high wear resistance and corrosion resistance can be used.

(5) The deceleration distribution transmission box adopts the structure of combining deceleration and torque, which is compact and reasonable, with optimized main parameters and high reliability. The driving motor realizes stepless speed regulation through frequency conversion governor. The drive motor and the transmission box are connected by elastic pin coupling, which can realize direct flexible transmission and ensure the stable and safe operation of the equipment.

driving motor

(6) The main engine is equipped with a feeding system, the feeding amount can be continuously and smoothly adjusted, and the production capacity of the unit can be easily adjusted within a certain range. (7) According to user's requirements, it can also be equipped with multi-channel feeding system to meet different production process requirements.

Riser feeding system

(8) The temperature control system of this equipment is heated by cast aluminum or cast copper heaters, which has the advantages of rapid temperature rise and long service life. The cooling system adopts high-temperature heat transfer oil, which has no temperature shock and can be cooled circularly.

(9) The control system of this equipment adopts European programmable computer controller system, and the temperature control adopts PID plus fuzzy control algorithm, so the temperature control is accurate. Each driving motor of the whole machine can be controlled locally or online, with convenient operation, simple understanding and beautiful interface. All operating parameters can be set, modified or displayed through 10 inch true color touch screen, and it has various interlocking protection and alarm functions.

Because of overcoming the shortcomings and powerful functions, POTOP small twin-screw granulation equipment is suitable for a variety of materials. For example, glass fiber reinforced and flame retardant (such as PA6, PA66, PET, PBT, PP, PC reinforced flame retardant, etc. ); High filler (such as PE and PP filled with 75%CaCO). ); Heat-sensitive materials (such as PVC and XLPE cable materials); Concentrated masterbatch (for example, filled with 50% toner); Anti-static master batch, alloy, coloring and low filling * * * mixed granulation; Cable materials (such as sheath materials and insulation materials); XLPE pipes (such as masterbatch for hot water crosslinking); Thermosetting plastics (such as phenolic resin, epoxy resin, powder coating); Hot melt adhesive, PU reactive extrusion (such as EVA hot melt adhesive, polyurethane), K resin, SBS devolatilization granulation, etc.