Preparation method and device of high performance polymers pipes
A technology for high-performance polymers and pipes, which is applied in the field of preparation methods and processing devices for realizing the method, can solve the problems of reducing the circumferential strength of pipes, internal stress defects, and different crystallization degrees of materials, and achieves improved performance and reduced internal stress. Effect
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[0029] Example 1
[0030] Such as figure 1 As shown, the device designed by the method of the present invention includes an extruder, a pipe extrusion head, a cooling setting mechanism 16, a pipe tractor 18, a cutting machine 19, a driving mechanism, and a cooling medium conveying mechanism 15 connected in sequence.
[0031] The extruder can be a single-screw or twin-screw extruder. The pipe extrusion head is composed of a head body 1, a front support body 2, a rear support body 3, a pipe extrusion die 4, a lead joint 5, a core rod 6, a bearing 7, 8, 10 and a bearing seat 11. Covered with temperature control heating ring. The head body 1 is a cavity with open ends, and a bearing 7 is placed on the stepped step at the rear end, and the rear support 3 is fixed in it. The front support body 2 is provided with a stepped through hole in the axial direction, in which a bearing 8 is placed, and the pipe extrusion die 4 is supported by it, and is connected to the driving mechanism throug...
Example Embodiment
[0033] Example 2:
[0034] Such as figure 2 As shown, the device of this embodiment designed by the method of the present invention also includes an extruder, a pipe extrusion head, a cooling setting mechanism 16, a pipe tractor 18, a cutting machine 19, a driving mechanism, and a cooling medium conveying mechanism 15 connected in sequence.
[0035] Since the cooling medium delivery mechanism 15 of this embodiment is composed of a micro high-pressure water pump 20, a water storage tank 21 and a nozzle 22, the nozzle 22 is installed at the outlet end of the core rod cooling medium channel 14 and the sizing sleeve 17 in the cooling setting mechanism 16. Except for the technical features that the opening angle of the bell mouth is 5° and the length is 30 cm, the shape, structure and connection relationship of the other parts are completely the same as those of the first embodiment, so the description is omitted.
Example Embodiment
[0036] Example 3
[0037] In this embodiment, high-density polyethylene is used as the raw material for the extruded pipe. figure 1 In the device given, the opening angle of the sizing sleeve of the cooling setting mechanism is 4°, and the length is 40cm. Vacuum sizing and spraying on the outer wall of the pipe are used. The outer wall of the pipe is sprayed at a temperature of 20℃ and passes through the mandrel at the same time. The inner cooling medium channel is fed with air at a temperature of 20°C and a pressure of 0.3 MPa, the circumferential tensile strength of the prepared pipe is 45.6 MPa, and the crack growth length of the pipe after the 300-hour environmental stress cracking performance test is 8.9 mm.
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