Single Screw Plastic Granulator VS Twin Screw Plastic Granulator

Time:2021-09-06

What are the differences between single screw and twin screw granulator? Wanrooetech mechanical engineer to explain the difference between single screw and twin screw plastic granulator said details as follows:

We look at the difference between single screw plastic granulator and twin screw plastic granulator from the working principle
Single screw plastic granulator: after raw material, under the effect of rotating screw, were laid to make and along the spiral groove rolling, because of the screw shear, compression and stirring effect, material mixing and plasticizing by further, temperature and pressure gradually rise, present a viscous flow state, and with certain pressure and temperature through the nose, and finally got the shape of the products you need;

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Twin screw plastic granulator: the production process of the material through the automatic elevator after the dense mixing of the material into the double cone feeder, the double cone will be forced to evenly add the material into the host screw, the material in the screw compression and shear and external heating under the action of mixing and plasticizing materials. Temperature and pressure gradually increase, showing a viscous flow state, and a certain pressure through the nose, extrusion cutting, and finally get the desired shape of particles.

single screw plastic granulator video:

double screw plastic granulator video:

Single screw granulator and twin screw granulator use difference:
Single screw plastic granulator: Single screw extrusion machine is mainly used for rubber and engineering resin filling, blending, modification, increase, chloride, polypropylene and high absorbent resin processing, biodegradable masterbatch, polycondensation of polyamide, polyurethane addition polymerization reaction extrusion, carbon powder, magnetic powder granulation, cable insulation material, sheath material, low smoke zero halogen flame retardant PVC cable and all kinds of silane crosslinking material preparation, etc

Twin screw plastic granulator: Twin-screw granulator is mainly used for rubber and engineering resin filling, blending, modification, increase, chloride, polypropylene and high absorbent resin processing, biodegradable masterbatch, polycondensation of polyamide, polyurethane addition polymerization reaction extrusion, carbon powder, magnetic powder granulation, cable insulation material, sheath material, low smoke zero halogen flame retardant PVC cable and all kinds of silane crosslinking material preparation, etc., Small models are mainly used for scientific research and teaching.

The difference between twin-screw granulator and single screw granulator is mainly shown as
1. twin-screw plastic granulator host machine is composed of two screw meshing closely with each other;
2. twin-screw plastic granulator material transport is forward displacement transport, its displacement depends on a screw and another screw corresponding to the groove close to the degree, so, closely meshing reverse rotating screw material can obtain the maximum forward displacement;
3. The distribution of conveying speed in twin-screw granulator is much more complex than that in single screw extruder.

Compared with the single screw plastic granulator, the twin-screw granulator has the following characteristics in granulation molding processing:
1. The conveying efficiency of single screw depends on the friction performance of solid materials and the viscosity of the melt. In the twin screw extruder, the material is transported by the principle of positive displacement, no pressure backflow, therefore, the material is easier to add than the single screw extruder;
2. Because the screw length of the twin screw granulation extruder is short, the residence time of the material in the twin-screw extruder is short. On the one hand, the occurrence of thermal degradation of the recycled material fiber can be avoided and the power consumption can be reduced.
3. the material after longitudinal and transverse shearing, mixing, has excellent homogenization plasticizing effect;
4. with excellent exhaust and self-cleaning function;
5. the flow rate of the twin screw granulation extruder is not sensitive to the pressure of the die, so it is more effective to extrude products of large size and area. The flow rate of a single screw granulation extruder is sensitive to die pressure.

What are the differences between single screw and twin screw granulator? The difference between twin-screw granulator and single screw granulator is mainly reflected in the difference of screw structure. The former is composed of two screws closely meshing each other, while the latter is one pushing the material forward.

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