Mixed pin barrel cold feeding extruder

Abstract

The invention discloses a mixed pin barrel cold feeding extruder which comprises a machine barrel installed on a feeding base body, wherein, a screw bolt is arranged inside the machine barrel; a plurality of rows of radial pins are arranged in the length direction of the machine barrel; the radial pins are fixed on the machine barrel through spiral pressing caps; end sockets of the pins stick into a screw slot of the screw bolt and are close to the root surface of the screw bolt; a circumferential grooving is formed in the corresponding position on a screw edge of the screw bolt, and the pinscan be inserted in the circumferential grooving; a plurality of rows of tangential pins are also arranged on the mixed pin barrel cold feeding extruder; the tangential pins penetrate through pin holes formed on the machine barrel, and penetrate through the screw slot of the screw bolt in the tangential direction of the screw bolt; the circumferential grooving is formed in the corresponding position on the screw edge of the screw bolt, and the pins can penetrate through the circumferential grooving; the two ends of each tangential pin are fixed on the machine barrel by nuts through external threads. The tangential pins adopt hollow structures, and fluid cooling medium can pass through the hollow structures. Compared with a common radial pin barrel cold feeding extruder, the mixed pin barrel cold feeding extruder has the advantages of better plasticization mixing effect, lower extrusion temperature, higher production capacity and wider application range.

Description

[0001] technical field [0002] The invention belongs to rubber processing mechanical equipment, in particular to a mixed type pin barrel cold feed extruder. Background technique [0003] Since the radial pin barrel cold feed extruder entered the production field of rubber processing industry in the mid-1970s, because of its high output, cold feed instead of hot feed has become a reality, and because of its lower extrusion Excellent comprehensive properties such as high temperature and high uniformity have been widely used in the rubber industry at home and abroad, and occupy the dominant position of modern rubber extrusion molding equipment. From its birth to the present, the technology of radial pin barrel cold feed extruder has been continuously developing. The Chinese patent "Pin Barrel Cold Feed Rubber Extruder" (Patent No. ZL94231236.8) provides a triangular belt drive between the motor and the gear reducer, the side belts of the left and right bearing brackets of the...

AI Technical Summary

Problems solved by technology

Although the radial pin barrel cold feed extruder has many excellent properties, the plasticizing effect is limited due to the small contact length between the radial pin and the compound (within the depth of the screw groove); and the inherent high Viscosity inevitably generates a lot of frictional heating during extrusion, even with radial pin cooling due to limited cooling surface area

Therefore, in order to prevent degradation and scorch and consider the upper limit of the processing temperature of the rubber itself, the maximum speed of the pin barrel cold-feed extruder screw must be limited, and the production capacity cannot be further improved simply by increasing the screw speed. The result Reduced productivity and economy

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