Rotary tube making device

Abstract

The invention discloses a rotary tube making device. The rotary tube making device comprises an extruder, an electric motor, an upper mold, a lower mold, a mandrel, a rotary conductive mechanism, a cooling mechanism and an electric box, the upper mold and the lower mold are fixedly connected, the mandrel is installed between the upper mold and the lower mold, a sealed cavity is formed between theupper mold, the lower mold, the mandrel and a deep groove ball bearing; the output shaft of the motor is fixedly connected with the mandrel, the rotary conductive mechanism is arranged between the mandrel and the motor, the mandrel is internally provided with a mandrel cooling channel, a mandrel thermocouple and a mandrel heating rod; an upper mold cooling channel and an upper mold pouring gate are arranged on the upper mold, a lower mold cooling channel and a lower mold pouring gate are arranged on the lower mold, the extruder extrudes melt into the cavity; and the cooling mechanism is connected with the mandrel cooling channel, the upper mold cooling channel and the lower mold cooling channel correspondingly. According to the rotary tube making device, the orientation of the molecular chain of a traditional extruded tube along the along the axial direction and the conditions of the traditional injection molding tube molecular chain isotropy and large quantities weld lines are improved, and the circumferential mechanical properties of the tube and pipe fittings are improved.

Description

technical field [0001] The invention belongs to polymer molding processing equipment, in particular to a novel rotary pipe-making device which can independently regulate temperature, pressure and circumferential direction. Background technique [0002] Compared with general materials, the final performance and structure of polymer materials depend more on the molding process. Under the synergistic effect of processing stress field and temperature field, polymer macromolecules can move, relax, reorganize, and then form different aggregate structures. This also theoretically provides the possibility for morphological structure control. Usually, the random orientation of molecular chains leads to the fact that the actual mechanical properties of polymer materials are much lower than their theoretical values. By controlling the condensed structure of polymers, its performance can be greatly improved. For example, increasing the orientation of molecular chains can greatly improv...

AI Technical Summary

Problems solved by technology

Therefore, when the pressure inside the pipe exceeds a certain critical value, the plastic pipe will yield and rupture along the axial direction, reducing the service life of the pipe

In order to improve the circumferential performance of the pipe, the traditional rotary extrusion method used in the past makes the polymer melt extruded by the screw subject to the combined action of the rotary shear force field and the tensile force field, but it is impossible to explore the molecular chain under the state of a single force field. Orientation situation, and it is easy to form weld lines through the shunt shuttle, and the improvement of the circumferential mechanical properties is limited. It is still necessary to increase the wall thickness of the pipe and increase the intermolecular force. This will not only waste raw materials and energy, but also increase the difficulty of cooling and shaping in the process.

Images