Twin-screw extruder used for preparing 105 DEG C polyvinyl chloride cable material

Abstract

The invention relates to a twin-screw extruder used for preparing a 105 DEG C polyvinyl chloride cable material. The twin-screw extruder comprises a rack as well as a main motor, a machine barrel and a complete machine electrical control cabinet, which are arranged on the rack, wherein conical twin screws are arranged in the machine barrel; a large-power transmission box is arranged at one end of the machine barrel; the output shaft of the main motor is connected with the large-power transmission box by a shaft coupler; the output shaft of the large-power transmission box is connected with the twin screws; an extruder head mould is arranged at the other end of the machine barrel; an automatic feeding device and a vacuum degassing device are mounted in a perpendicular direction of the machine barrel; the twin screws comprise a large screw and a small screw which are arranged side by side and are different in length; the machine barrel comprises an integral alloy sleeve body and a bushing adaptive to the twin screws; a heating sheet mounting hole, a cooling water inlet and outlet, pressure sensor and temperature sensor mounting holes, and a vacuum-pumping hole are formed in the barrel body; and the complete machine electrical control cabinet is controlled by adopting a PLC (programmable logic controller) industrial automatic human-computer interface. The complete machine is high in degree of automation, good in safety performance and high in production efficiency.

Description

technical field [0001] The invention relates to a twin-screw extruder, in particular to a twin-screw extruder used in the production process of preparing 105°C polyvinyl chloride cable material by a silane crosslinking method. Background technique [0002] In the process of producing PVC cable compound by silane crosslinking method, a twin-screw extruder is required. The existing twin-screw extruders used for silane cross-linked cable materials mainly have the following problems: the bearing structure of the drive shaft is easily damaged, which increases maintenance frequency and cost; The extrusion force of the material will cause damage to the structure of the material; there is an air leakage phenomenon when adding materials to the cylinder, and the gas brought into the cylinder with the material will produce pores during the process of extruding the product from the material; in addition, the existing screw The thread distribution structure is not ideal, and the materia...

AI Technical Summary

Problems solved by technology

The main problems of existing twin-screw extruders used for silane crosslinked cable materials are: the bearing structure of the drive shaft is easily damaged, which increases maintenance frequency and cost; Extrusion force, which causes damage to the structure of the material; there is an air leakage phenomenon when adding materials to the cylinder, and the gas brought into the cylinder with the material will produce pores in the process of extruding the product from the material; in addition, the existing screw The thread distribution structure is not ideal, and the material extrusion time is short, which makes the quality of the extruded product unreliable

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