RU1770147C - Equipment for preparation of corrugated hoses made of polymers - Google Patents

Abstract

Usage: the manufacture of corrugated hoses from polymers and rubber in the chemical industry, in mechanical engineering. SUMMARY OF THE INVENTION: the device comprises an extruder, an annular head formed by a mandrel and a mouthpiece. One half-matrix of a corrugator is fixedly fixed on the end face of the head housing and the mouthpiece. The second half-matrix is made in the form of sectors. They are connected to the drive of their periodic, radial movement along the end face of the first half-matrix to reduce - dilute sectors. The forming annular groove is formed by two half-matrices with reduced sectors. An annular groove is made on the mandrel in the area where the groove is located. It contains the outlet of the working medium supply channel under pressure. 5 ill.

Description

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The invention relates to devices for processing polymer materials and can be used in mechanical engineering, in the chemical industry for the manufacture of corrugated pipes from polymer materials, including made of rubber.

A device for producing pipes from thermoplastics is known, comprising a screw extruder with an annular head and a calibrating nozzle, means for cooling, perforating, drawing and cutting the pipe, means for corrugating the pipe, made in the form of endless chains located in the chamber, onto which matrices are attached with rollers moving along the figured grooves of the guide plates (ed. St. No. 197149, class B 29 C 59/04. 1966).

A disadvantage of the known device is the complexity and cumbersomeness of its design, due to the presence of infinite circuits in the chamber.

The closest in technical essence to the proposed solution is a device for the manufacture of corrugated hoses from polymers containing an extruder. an annular head made in the form of a mouthpiece and turf placed in the housing with a pressure medium supply channel, a corrugator with two half-matrices made with an annular forming groove and a selection means (ed. St. USSR No. 596469, class B29 C 59/04. 1976).

In the specified device, the annular head mandrel is made protruding beyond the end of the mouthpiece and is equipped with a sleeve made of anti-XI XI mounted on its outer surface

ABOUT

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adhesive material and a sealing ring of elastic material coated with a release film located at the point of complete closure of the corrugator half-matrices.

The disadvantage of this device is the unreliability of its use in the manufacture of rubber sleeves due to the large distance between extrusion and molding during corrugation, because, on the one hand, cooling of the rubber increases the elasticity of the material during molding, and on the other hand, because a small rubber carcass in comparison with thermoplastics moving it along a long mandrel is extremely unreliable, especially at the beginning of manufacture. In addition, the disadvantage of the known installation is the complexity and the associated low reliability of the structure as a whole and large dimensions.

The purpose of the invention is to increase the reliability of the device and simplify its design.

This goal is achieved by the fact that one of the half-matrices of the corrugator is mounted on the ends of the head and mouthpiece housing, the second half-matrix is made in the form of sectors connected to the drive of their periodic radial movement along the end surface of the first half-matrix to reduce the separation of the sectors, while the annular forming groove is formed by two half-matrixes when reducing the sectors of the second half-matrix, and on the mandrel in the zone of placement of the forming groove of the half-matrix, an annular groove is made in which the channel exit is located supplying working fluid under pressure.

Figure 1 shows a General view of the device; figure 2 is a section aa in figure 1; in Fig.3 - the same in the position of the divorced sectors of the half-matrix; in Fig.4 node I in .ig. 1; figure 5 is the same in the position of the diluted sectors of the half-matrix.

A device for the manufacture of corrugated sleeves made of polymers contains an ex-labor 1, an annular head made in the form of a mouthpiece 3 and a mandrel 4 placed in the housing. The corrugator is made in the form of two half-matrices 5 and 6. One of the half-matrices 5 is fixedly mounted on the ends of the head-case 2 and mouthpiece 3. The second half-matrix 6 is made in the form of sectors mounted by means of fingers 7, placed in the guide grooves 8 of the first half-matrix 5, on the end surface of the first half-matrix 5. The sectors are installed with the possibility of periodic frontal reciprocating

the surface of the first half-matrix 5 to reduce the separation of sectors by means of an actuator having a cam hollow shaft 9, mounted on bearings 10 in the actuator housing 11, a gear 12, a motor 13, rollers 14 of the movable sectors and springs 15 The device also includes a selection means 16 with a drive (on hell, not shown). The annular forming corrugation groove is formed by two half-matrices 5, 6 when comparing the sectors of the second half-matrix 6. And on the mandrel 4 in the zone of placement of the forming groove of the half-matrices 5, 6 there is an annular groove 17 in which the outlet is located

5 channels 18 for supplying a working medium, for example, compressed air, under pressure.

The device operates as follows.

Set the cam shaft 9 to the position of the diluted sectors of the half-matrix 6, turn on the extruder, extruded rubber mass is formed in the annular head in the form of a pipe 19, turn on the supply of compressed air to the annular groove 17,

5, which contributes to the reliable movement of the pipe 19 along the mandrel 4 to the sampling means 16, surfactants are supplied with compressed air to prevent the tube 19 from sticking together, thereby obtaining sleeve sections

0 without corrugation. With the onset of the established mode of extrusion, the sleeves turn on the motor 13 of the drive of the sectors of the half-matrix 6, when the cam shaft 9 is rotated, when the rollers 14 under the action of the springs 15 fall

5 into the hollows of the cam shaft 9, the sectors of the half-matrix 6 converge radially and squeeze the extrudable pipe 19 on the mandrel 4, after which, under the influence of compressed air from the annular groove 17, the constantly extrudable pipe 19 is inflated and formed into a corrugation in the annular forming groove formed by the half-matrix 5 and half-matrix sectors 6; when the rollers 14 fall on the protrusions of the cam shaft 9,

5, the sectors of the half-matrix 6 are consumed and make it possible for the corrugation formed to emerge from the molding zone (see Fig. 5), compressed air in the groove 17 contributes to this. With further rotation of the cam shaft 9

0, the rollers 14 fall into the following depressions and the molding cycle of the next corrugation is repeated. Next, the means 16 transfers the received sleeve to the heat treatment means of the sleeve (not shown in the drawing).

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The speed of rotation of the cam shaft 9 is synchronized with the speed of extrusion. As the number of sectors of the half-matrix 6 increases, the speed of the cam shaft 9 decreases.

The relative lengths of the protrusions and depressions of the cam shaft 9 are synchronized with the time of forming the corrugation relative to the time of exit of the corrugation from the forming zone.

The device is easy to manufacture and maintain. Using it will allow you to reliably produce corrugated sleeves and covers made of rubber, including it will allow mechanizing the manufacture of a blank for sleeves with tight corrugation, for example, of these wires and conductors, for which the blank is tightly compressed on the vulcanizing mandrel before vulcanization. With a sufficient degree of matrix cooling, the device provides the production of thermoplastic hoses.

Claims (1)

SUMMARY OF THE INVENTION A device for making corrugated sleeves made of polymers containing an extruder, an annular head is made12. one in the form of a mouthpiece and a mandrel placed in the housing with a pressure medium supply channel, a corrugator with two half-matrices made with an annular forming groove, and a selection means, characterized in that, in order to increase the reliability of the device and simplify its design, one of the half-matrices corrugator mounted on the ends of the housing the head and the mouthpiece, the second half-matrix is made in the form of sectors connected to a drive for periodically radially moving them along the end surface of the first half-matrix to reduce — the dilution of the sectors, while the annular forming groove is formed by two half-matrices when the sectors of the second half-matrix are reduced, and on the mandrel in the forming zone half-matrix grooves An annular groove is made in which the outlet of the working medium supply channel under pressure is located. Figure 1  Aa Fig 2 Fig.Z /4 Q 6 9