Exhaust-type differential double-screw extruder

Abstract

The invention relates to an exhaust-type differential double-screw extruder, mainly comprising a feeder, a cylinder, screws, a machine head, a heating and cooling device, an exhaust outlet, a motor and a driving device, wherein one screw is a male rotor, and the other screw is a female rotor; at least one screw thread engaging region is arranged when the screws are combined, the screw socket number of the female rotor in the region is integral multiples of that of the male rotor, the rotating speeds of the female rotor and the male rotor are in inverse proportion to the screw socket number, and differential rotation and no interference during movement can be realized for the female rotor and the male rotor. At least one exhaust outlet is arranged on a material cylinder so as to remove moisture and other volatile components, and the screw configuration distribution meets the exhausting requirement. According to material processing requirements, screw thread sections or other forms with different leads and section shaped lines can be arranged on different sections of a charging section, a fusion section, an exhausting section and a metering section of the screws; when the screws are installed, besides at least one screw thread engaging region with differential rotation is ensured, the screws in different sections can be engaged and can be also unengaged so as to reinforce mixing or other functions. The extruder has favorable mixing, plasticizing and conveying capabilities and is suitable for processing and forming various granules, powder materials or even block materials, such as plastics, rubbers, food, explosives and the like.

Description

technical field [0001] The exhaust type differential speed twin-screw extruder of the present invention is widely used in industries such as petroleum, chemical industry, rubber, plastics, food, pharmacy, explosives and propellant, and the extruder has good mixing, plasticizing, conveying and Devolatilization ability, suitable for mixing, granulation, reaction processing and extrusion molding of various granules, powders and even blocks such as plastics, rubber, food and explosives. Background technique [0002] In industries such as petroleum, chemical, rubber, plastic, pharmaceutical, food, explosives and propellants, it is often involved in the mixing, shearing and plasticizing of high-viscosity fluids. Extruders and kneaders are used to achieve these functions. important equipment. The twin-screw extruder can be significantly better than the single-screw in terms of mixing effect and output. In order to remove moisture and other volatile components in pellets, powders ...

AI Technical Summary

Problems solved by technology

However, the axial thread structure of the screw in this patent is exactly the same, which cannot adapt to the different thread structures required by different processing stages of materials; the patent stipulates that the number of thread heads of the male rotor is 1, and the form is too simple; there is no exhaust section, and the devolatilization The function is poor; and the patent is only a continuous kneader, which is not suitable for extrusion molding, granulation, mixing, etc. of materials.

Images