Material strip cooling device of double-screw extruder and with vacuum pumping system

Abstract

The invention relates to a material strip cooling device of a double-screw extruder and with a vacuum pumping system. Under the condition that the length of a water tank is not changed, a material strip moves forwards in a bending mode in the cooling water tank after being guided by a guide wheel, and thus the time of water passing and heat dissipation of the material strip is prolonged. Meanwhile, a cooler is connected to the exterior of the water tank, so that the phenomena that the temperature of the material strip is excessive, thus a particle cutting machine is clamped, and to-be-screened materials are excessive are effectively prevented. The tail end of a material cylinder of a double-screw extruder communicates with the vacuum pumping system, when vacuum pumping is needed, only a pump needs to be started, air in the material cylinder is pumped into a processing tank, the pumped air is filtered through a filtering tank and then exhausted, dust and water which are carried by the air are exhausted from the bottom of the processing tank, and thus the situation that the double-screw extruder is stopped to conduct operating is not needed. A graphite heat exchanger is further arranged in the water tank, cooled water is led to the graphite heat exchanger, thus the phenomena that the temperature of the material strip is excessive, thus the particle cutting machine is clamped, and the to-be-screened materials are excessive are effectively prevented, and thus the product quality is improved.

Description

technical field [0001] The invention relates to a cooling strip device of a twin-screw extruder with a vacuum system, which is used for cooling the cooling strips coming out of the production line of the twin-screw extruder, and belongs to engineering plastic cooling equipment. Background technique [0002] The strips extruded in the twin-screw extruder production line need to be passed into the water tank for cooling. However, due to the limited length of the water tank, the heat dissipation time of the material strands in the water tank is short, and the temperature of the material strands cannot be effectively lowered, resulting in the overheated material strands blocking the subsequent granulator, and over-sieving. Many phenomena, thus reducing the quality of the final product; at the same time, the twin-screw extruder needs to vacuumize the inside of the barrel during the production process to prevent the pellets from being polluted, so as to ensure the quality of the e...

AI Technical Summary

Problems solved by technology

However, due to the limited length of the water tank, the heat dissipation time of the material strands in the water tank is short, and the temperature of the material strands cannot be effectively reduced, resulting in the overheated material strands blocking the subsequent granulator, and over-screening. Many phenomena, thus reducing the quality of the final product; at the same time, the twin-screw extruder needs to vacuumize the inside of the barrel during the production process to prevent the pellets from being polluted, so as to ensure the quality of the extruded pellets. However, in the past The vacuum device needs to be operated after the twin-screw extruder is shut down during operation, which not only increases the labor intensity for the workers, but also increases the working time and reduces the work efficiency

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