RU15379U1 - PLANT FOR MANUFACTURING PLASTIC PIPES - Google Patents

Description

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Installation for the manufacture of plastic pipes.

The utility model relates to the production of plastic, in particular polyethylene pipes.

Known extruder installation, consisting of technologically sequentially installed extruder, pulling, cutting and receiving devices 1.

The known installation does not allow the manufacture of reinforced pipes. For the manufacture of such pipes on an extruder plant, a long tube billet is prepared and transferred to a plant that provides winding of the reinforcing layers and the protective coating 2.

The technical challenge facing the utility model is to create a plant for the continuous production of reinforced pipes.

The problem is solved in that in the installation for the manufacture of plastic pipes containing the extruder installed in the technological sequence for the manufacture of the pipe billet, a pulling, cutting and receiving device, between the extruder for the manufacture of the pipe billet and the pulling device, a winding unit for applying layers to the pipe billet is sequentially installed reinforcing tape and an additional extruder block for applying a protective coating to the formed reinforcing layer.

The utility model is illustrated by the drawing, which shows the installation diagram for the manufacture of reinforced three-layer plastic pipes.

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billet 3, block 4 windings for applying to the billet 3 layers of reinforcing tape 5, an additional extruder block 6 for applying a protective coating 7 to the reinforcing layer formed from tapes 5, pulling 8, cutting 9 and receiving 10 devices.

The extruder unit 1 for the manufacture of a tube billet 3 comprises: a single screw extruder 2 with weight control of the load, ultrasonic control of the wall thickness and a direct-flow extrusion head; a vacuum bath 11 with a system for creating and regulating vacuum and water exchange; cooling bath 12 irrigation type. A pulling device 13 may be included in the block.

The winding unit 4 may be two or four sectional, with each section comprising: a winding device 14 with a reel 15 mounted on a rotating faceplate 16; floating centralizer 17; a mechanism 18 for ending the tape; tunnel kiln 19.

The extruder unit 6 for applying a protective coating is an extruder 20 with a side head and a cooling bath 21 irrigation type with a water exchange system.

An extruder 2 is formed from granular PE-80 polyethylene to form a tube stock 3, which is pulled by a pulling device 13 through a calibrating vacuum 11 and a cooling bath 12 and fed to the winding unit 4, where reinforcing tapes 5 are formed on it in the form of a cross-shaped winding, forming a reinforcing layer. Moreover, after applying each layer of reinforcing tape, the surface of the applied layer of tape is melted in the tunnel ovens 19 by an infrared heater for 3 s at a temperature of 350 ° C. The first tape is laid on the pipe side with a thicker layer of polyethylene, and the second tape is laid on the first thread on the thread. The tape should be stretched and directed at an angle of 5515 °, which is provided by the centering 17 and the ending 18 devices. A winding angle of + 55 ° and -55 ° ensures an optimal balance of peripheral and axial

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loads. The speed of rotation of the faceplates is regulated depending on the speed of movement of the workpiece.

From the winding unit, the pipe billet is fed to the extruder block 5 and a protective coating is applied to the formed reinforcing layer 7. From the additional extruder block 5, the pipe billet reinforced with the coating by the pulling device 8 is fed to the cutting device 9, where the measured length pipes are cut into the receiving device 10, from which pipes are unloaded for shipment to the consumer or storage.

A pipe marking device may be installed in front of the pulling device.

Sources of information:

1. Plastic pipelines. Edited by F.A. Sheveleva. M, Gosstroyizdat, 1960, p. 160-162.

2. RF patent No. 2143628, F16L 9/12, 1998;

Deputy General Jy fc: | "th ;. Director of OJSC

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Claims (1)

Installation for the manufacture of reinforced three-layer plastic pipes, containing an extruder installed in the technological sequence for the manufacture of a tube stock, a pulling, cutting and receiving device, characterized in that between the extruder for the manufacture of the tube stock and the pulling device, a winding unit is installed in series for applying layers of reinforcing to the tube stock tapes and an additional extruder block for applying a protective coating to the formed reinforcing layer.