Extruder device for automatically controlling and adjusting extrusion amount in rubber injection molding screw

Abstract

The invention discloses an extruder device for automatically controlling and adjusting the extrusion amount in a rubber injection molding screw. The extruder device comprises a machine barrel and a speed reducer, wherein the machine barrel is fixedly connected to the output end of the speed reducer; a steel sleeve is connected in the machine barrel in a sleeving mode; a screw is connected in the steel sleeve in a sleeved mode; an exhaust ring is arranged on the screw; the maximum circumcircle of the exhaust ring is greater than the diameter of circumcircles at the two ends; an exhaust ring groove matched with the exhaust ring is formed in the inner wall of the steel sleeve; a screw adjusting device is arranged in the speed reducer; the screw adjusting device comprises a screw adjustable pull rod which penetrates through the speed reducer and is arranged in the speed reducer in a sliding connection mode; the output tail end of the pull rod abuts against the screw; and the output front end of the pull rod extends out of the speed reducer.

Description

technical field [0001] The invention relates to the technical field of rubber extruders, in particular to an extruder device for automatically controlling and adjusting the extrusion volume in a rubber injection molding screw. Background technique [0002] During the rubber extrusion molding process, in order to increase the product density, the rubber extruder is usually designed as a vacuum extruder. Therefore, the exhaust extruder body must be heatable and temperature controllable, and the screw must have a certain compression ratio and stirring capacity. The purpose is to plasticize the rubber quickly, and then design the screw as an exhaust ring, and use the exhaust groove ring to compress the plasticized rubber into thin sheets, so that the water vapor inside the rubber can be discharged and transported to the extrusion section, because extrusion The outlet section is in a relatively vacuum environment, and the discharged water vapor can be quickly vaporized in a rela...

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Problems solved by technology

[0003] However, in the actual production process, it was found that the cross-sectional area of ​​the exhaust ring and the steel sleeve of the fuselage was fixed, resulting in poor adaptability of the equipment to different rubbers.

Due to the variety of rubber varieties and specifications, the Mooney viscosity, hardness, and extrusion performance all have obvious differences. However, the cross-sectional area between the screw exhaust ring and the rigid sleeve in the original design is fixed and consistent, which cannot adapt to the extrusion of different rubbers. Under the condition of constant pressure, the amount of raw materials with good extrusion performance and good fluidity passing through the exhaust ring is large, and vice versa. If there is too much, the raw material will come out from the vacuum port, resulting in vacuum failure

And if there is too little from the exhaust ring, it will cause the screw groove of the extrusion section to lack glue, which will affect the instability of the cross-sectional area of ​​the product.

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