Super high-pressure single screw extruder

Abstract

The invention relates to a hyper-pressure single-worm extrusion machine, comprising: a machine barrel, a screw bolt, a charging hopper, a driver, a motor, a cooling device, and an engine base. The invention is characterized in that: the cooling device is arranged on the machine barrel and the screw bolt; the geometric compression ratio of screw bolt is designed as high as 10-120; and the rotational speed of screw bolt is 30-1500 r / min. The invention has following advantages that: the cooling devices are arranged on the machine barrel and the screw bolt to eliminate the temperature over normal ones caused by the high-speed friction between chemical material and the machine barrel and screw bolt; the compression ratio of screw bolt is designed as high as 10-120 (according to the property of chemical material) to form a hyper-pressure solid transfer piston formed by extruded chemical material between the machine barrel and screw bolt; then the chemical material and the screw bolt, the chemical material and the machine barrel, the chemical material and the chemical material has friction in the hyper-pressure condition to generate heat, with which the chemical material can be melt and molded in short time, to be incised and mixed smelt; according to the friction temperature, the rotational speed of screw bolt is set at 30-1500 r / min, for controlling the amount of feeding material, the cooled amount and the friction temperature in stable balance condition.

Description

technical field [0001] The invention relates to an extruder for plastic extrusion, kneading, granulation and plastic extrusion molding, which belongs to the technical field of plastic machinery. Background technique [0002] The traditional plastic extruder, no matter what kind of extruder is in normal operation, is heated by a heating device outside the barrel, and the extruded chemical material enters the extruder from the feeding port. , is gradually softened by the heat of the barrel, and is compacted and softened while being pushed forward under the rotation of the screw of the extruder. During the whole working process, the pressure in the barrel of the extruder is very low. The geometric compression ratio of the extruder is designed to be less than 5 times (see attached table 1), because according to the traditional extrusion theory, during the normal operation of the extruder, excessive pressure should be prevented to cause self-heating of the chemical material. If ...

AI Technical Summary

Problems solved by technology

For example, the promotion and use of PVC plastic doors and windows fully illustrates this problem. In terms of thermal insulation and energy-saving effects, PVC plastic windows are the first choice for energy-saving buildings. Yellow and colored profiles will inevitably fade, the surface of the profiles is slack and not resistant to dirt, the color of the profiles is single and low-grade, and the quality problems such as cracking of welding angles are indeed common. As a result, high-rise buildings dare not use PVC plastic windows. The high-end construction market is not Willing to use PVC plastic windows, which makes it more difficult to promote the use of chemical building materials

As far as the current manufacturing technology is concerned, the above-mentioned quality problems cannot be solved. Therefore, the Ministry of Construction of the People's Republic of China calls on scientific research departments, plastic chemical research institutes, and chemical building material production enterprises to intensify their efforts in technical research and development, and strive to improve the quality of chemical building material products. Quality, improve product grades, in order to meet the huge demand of the energy-saving building market in the future

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