Introduction of extruder for plastic tile equipment

- Aug 03, 2020-

The hollow composite tile produced by hollow composite tile equipment has better sound insulation and heat insulation effect than traditional composite tile due to its lattice structure in the middle. In addition, the features of anti-corrosion, acid and alkali resistance, fire prevention and convenient construction are still significant. Now I will introduce the extruder, an important part of the hollow composite tile equipment.


Transmission system of extruder for hollow composite tile equipment

The function of the extruder drive system of hollow composite tile equipment is to drive the screw and supply the torque and speed required by the screw in the extrusion process, which is usually composed of motor, reducer and bearing.

On the premise of the same structure, the manufacturing cost of the reducer is approximately proportional to its overall size and weight. Because of the large shape and weight of the reducer, it means that more materials are consumed in manufacturing, and the bearings used are relatively large, which increases the manufacturing cost.

For the extruder of hollow composite tile equipment with the same screw diameter, the high-speed and high-efficiency extruder consumes more energy than the conventional extruder, and the motor power is doubled, so it is necessary to increase the frame number of the reducer accordingly. But high screw speed means low reduction ratio. For the same size reducer, the gear module of low reduction ratio is larger than that of large reduction ratio, and the bearing capacity of reducer is also increased. Therefore, the increase of the volume and weight of the reducer is not linearly proportional to the increase of motor power. If the extrusion amount of the main engine in the hollow composite tile equipment is used as the denominator and divided by the weight of the reducer, the number of high-speed and efficient extruders is small, and that of ordinary extruders is large.

In terms of unit output, the motor power of high-speed and high-efficiency extruder is small and the weight of reducer is small, which means that the manufacturing cost of high-speed and high-efficiency extruder in hollow composite tile equipment is lower than that of ordinary extruder.


Heating and cooling device of extruder in hollow composite tile equipment

Heating and cooling are necessary conditions for the extrusion process of plastics.

(1) in the hollow composite tile equipment, the extruder usually uses electric heating, which is divided into resistance heating and induction heating. The heating sheet is installed in the body, neck and head. The heating device heats the plastic inside the cylinder by external heating, so as to reach the temperature required by the process operation.

(2) the cooling device in the hollow composite tile equipment is set to ensure that the plastic is in the temperature range required by the process. Specifically, it is to eliminate the excess heat generated by the shear friction of screw rotation, so as to avoid the difficulty of plastic decomposition, scorching or shaping due to too high temperature. In the hollow composite tile equipment, the cooling of extruder barrel is divided into water cooling and air cooling. Generally, air cooling is more suitable for small and medium-sized extruders, while water-cooling or combination of the two forms is used for large-scale extruders; central water-cooling is mainly used for screw cooling, which aims to increase the solid conveying rate of materials, stabilize the glue output and improve the product quality; However, the cooling at the hopper is to strengthen the conveying function of solid materials, prevent the plastic particles from sticking and blocking the material mouth due to temperature rising, and ensure the normal operation of the transmission part.