SU910437A1 - Unit for producing flexible hoses - Google Patents

Description

(54) INSTALLATION FOR THE MANUFACTURE OF FLEXIBLE HOSES

I

The invention relates to equipment for the production of flexible stretchable hoses for vacuum cleaners and can be used in light industry.

A known device for the manufacture of reinforced tubular goods, comprising an armature feeding and braiding unit, made in the form of a rotary bobbin and a fixed cartridge with electromagnetic clamps. A worm press with a head for extruding the shell, a conveying unit of the reinforced product 1.

The disadvantage of the installation is the difficulty of forming a reinforcing sleeve of longitudinal and transverse threads and the inability to manufacture on the installation of products such as hoses consisting of a corrugated sheath of thin elastic material and an elastic reinforced wire helix, the pre-tension of which

imparts to its coils the ability to return to contact with each other.

The closest to the technical essence, X and the achieved result to the invention is the installation for the manufacture of flexible hoses, containing units for transporting the spiral and hose, the unit for stretching the spiral and fixing its pitch, worm press O with head for extruding the hose casing, press chamber for forming corrugations with inlet and outlet nozzles of the hose, a fixation unit of a pitch corrugation made in the form of a pair of rollers placed successively behind the cooling element G2,

In this installation, the node fixing the pitch corrugation and cooling element. 70 are located outside the bale chamber to form the corrugations behind the outlet nozzle.

The input nozzle is fixed permanently on the camera. 3 9 The speed variator is mounted on the frame and is kinematically connected to the corrugation step fixation unit. A disadvantage of the known setup is that the fixture step fixation unit therein is located at a sufficiently large distance from the spiral expansion unit and the head for extruding the shell and is located after press chamber and cooling element. This design causes irregularity in the formation of the corrugation pitch, since the spiral, the passage of the head, at the expense of its sagging, touches the walls of the head, stops for some time, breaks it off, this in turn causes uneven movement and formation of the spiral pitch With another On the other hand, the cooling element located between the press chamber outlet nozzle and the rollers of the fixation unit of the pitch of the corrugation cools and additionally fixes the corrugations on the helix with uneven pitch, i.e. cooling occurs at an uncommitted pitch of the corrugation of the hose. The stationary fixing of the hose inlet pipe into the press chamber has the disadvantage that the initial filling of the helix and helix with the superposed sheath (hose) in the installation takes considerable time to fix the continuously extruded sheath on the moving helix. the design of the nozzle does not provide for the adjustment of the pressure inside itself and the bale chamber in the process of forming a hyfr. As a result, uneven formation of the corrugation depth and frequent disturbance of the corrugation molding process are observed due to the fact that the overpressure tears the casing in the joint zone with the extrusion head. This is due to the fact that the pressure along the entire length of the forming bale chamber is uneven and more in place of the junction of the inlet of the press chamber with the head for extruding the shell and less on the outlet nozzle due to the air outlet. The purpose of the invention is to improve the installation performance and the quality of the hoses. The goal is achieved by the fact that in an installation for the manufacture of flexible hoses containing spiral transporting and hose assemblies, a spiral stretching unit and fixing its pitch, a screw press with a head for extruding the hose casing, a press chamber for forming corrugations with inlets and outlets hose, pitch fixing unit corrugation, made in the form of a pair of rollers placed sequentially behind the cooling element, according to the invention; the corrugation fixing unit pitch is provided with an additional pair of rollers mounted in the press chamber, and cooling the element is made in the form of a pipe placed inside the nozzle of the outlet of the press chamber hose between pairs of rollers of the fixation pitch unit corrugation. In addition, the inlet hose inlet of the press chamber is made in the form of telescopic tubes, the movable of which is equipped with a ring with adjustable openings for supplying the working agent. In FIG. 1 shows a general view of the installation; in fig. 2 — press chamber for forming corrugations; in fig. 3 is a cross section AA of FIG. 2. The installation includes a helix transportation unit 1, a hose transportation unit 2, a unit 3 for stretching the helix and fixing the helix pitch, a worm press head (not shown) for extruding the hose sheath, a press chamber 5, the fixing unit of the corrugation pitch in the form of a pair of rollers 6 and an additional pair of rollers 7 and the drive 8 of the installation. The press chamber 5 consists of a housing 9 within which the upper and lower rollers 7 of the corrugation pitch fixation unit are mounted in the guide groove 10. The rollers 7 are coated with a sponge material 11. The distance between the centers of the rollers 7 can be changed by means of a screw 12 and a nut 13 located in the groove of the bearing assembly 1. Accordingly, for each roller 7 on the screw 12 there is a right and left-hand thread for interacting with the nut 13. On the rear end wall 15 of the press chamber 5, a variator 1b mounted on a hollow axis 17 is disposed. The variator 16 consists of a disk 18 fixedly mounted on an axis 17 and a movable disk 19. The position of the disk 19 (to change the speed of the rollers 7) is changed PC Ngoy 20 through the bearing 21 and the bar 22 by rotating the handle 23 to the screw 2.

On the side walls of the housing are mounted nozzles input 25 and output 26.

The entry nozzle 25 comprises a movable telescopic tube 2, at the end of which a ring 28 is mounted with holes 29, aligned with the screw holes 30 of the tube 27. The holes 29 and 30 overlap by turning the ring 28 and fixing it with a screw 31..

For convenience and speed of refilling the helix into the press chamber 5, the telescopic tubes 1 and 27 are retracted and brought to the head and fixed by screw 32,

For the same purpose, the press chamber 5 is provided with a hinged door 33 with viewing glass 3

The compressed air is supplied to the press chamber 5 through the opening 35. The pressure in the press chamber 5 is adjusted by means of a BF valve and blocking the openings 29 and 30 by ring 28.

Inside the outlet nozzle 2b, a cooling element is mounted in the form of an elongated tube 37 for cooling the hose.

The installation works as follows.

A spiral 38 wound on a spiraling / winding machine (not shown in the drawing) arrives at the transportation unit 1. which takes it to the node 3.

At node 3, helix 38 is stretched by a certain step due to the difference in speeds of the rollers. Then, in the stretched and fixed form by the rollers 7, the helix 38 is pulled through the head and the press chamber 5. The sheath 39, the outlet from the head and is superimposed on the stretched helix 38 |. And due to the difference of the linear sheath 39 and helix 38 thickness and the diameter of the shell 39 is reduced and the helix 38 is tightly lightened.

Further, the passage inside the press chamber 5, and due to an overpressure, the sheath 39 is pressed between the turns of the helix 38, forming corrugations.

The passage of the tube 37, the hose 0 is cooled, while the linear speed of the hose tO between the rollers 6 and 7

lower than between head A and rollers 7.

After the forming is completed, the corrugation hose 0 is cut to the measured lengths.

Due to the presence of an additional pair of rollers for fixing the pitch of the corrugations located in the press chamber, and the location of the cooling element in the outlet chamber of the press chamber, the quality of the hose is improved by ensuring uniform depth and pitch of the corrugations and increasing the productivity of the installation by reducing the time for filling the helix and reducing reject rate, which also contributes to the telescopic execution of the nozzle of the bale chamber.

Claims (2)

1. Installation for flexible hoses, containing the helix and hose transportation units, the helix stretching unit and fixing its pitch, a screw press with a head for extruding the hose casing, a press chamber for forming corrugations with hose inlets and outlets, fixing unit pitch corrugation, made in the form of a pair of rollers, Placed in series for cooling the element, characterized in that, in order to improve the installation performance and quality of the hoses, the corrugation pitch fixing unit is equipped with a complementary pair of rollers mounted in the press chamber, and the cooling element is designed in the form of a pipe placed inside the outlet pipe of the press chamber hose between pairs of rollers of the fixation pitch of the corrugation, 2. The installation according to claim 1, so that it is so that the nozzle of the input of the press chamber hose is made in the form of telescopic tubes, movable of which is equipped with a ring with adjustable openings for supplying the working agent, , Sources of information taken into account in the examination USSR author's certificate number 191104, cl. In 29 D 23/05, 196. 2o Patent of England No. 816160, class, 87/2 / A, published. 1959 (prototype). "SI R -21 No rff / fS G7 I / or / 7 th n XZ / l : a gz 1 / g.