RU2620803C1 - Composite reinforcement production method - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: according to the production method the reinforcement mandrel is made from the roving filaments, for that purpose the roving filaments are dried by the heated air, impregnated with binder, the reinforcement mandrel is formed from the roving filaments. The reinforcement hooks are formed at the mandrel by the winding of harness on the mandrel. The resulted reinforcement workpiece is heated in the furnace until the binder polymerization. After the reinforcement release from the furnace it is cooled. Each filament is impregnated with the binder in the separated filament position. Each filament is pulled up after impregnation and the binder is wrung out from it. The impregnated filaments are connected longitudinally into the bunch. The bunch of filaments is pulled and wrung out from the binder surpluses. While pulling the filament bunch, convert the impregnated filaments into the position parallel relative to the other filaments. The dry harnesses are made from the dry roving filament simultaneously with reinforcement mandrel manufacture, for that purpose each dry harness is twisted around its longitudinal axis and simultaneously stretch it in the longitudinal direction, at the same time increase the twisting moment and tensile force and give the hardness to the harness, greater in comparison with the mandrel hardness. Each dry harness is wound up on the mandrel. The round shape of the mandrel and reinforcement protruding hooks above it, is formed by the dry harnesses. At the same time at winding of each harness on the mandrel the harness is pressed until the formation of the groove in it, the smaller part of the harness is positioned there by pressing depth adjusting of the harness into the mandrel. The resulted reinforcement workpiece is kept from the contact with the mandrel until the harnesses impregnation with the binder, and simultaneously with the indicated workpiece curing, it is moved to the furnace in which its heating and polymerization is carried out. The gradual cooling of the manufactured reinforcement is carried out.

EFFECT: increase of the reinforcement strength and its bearing capacity.

9 cl, 17 dwg

Description

This method relates to the production of reinforcement for concrete reinforcement. The method is intended for use in the field of construction. The method relates to the production, in particular, of composite reinforcement made of fibers impregnated with cured resin.

This method provides a sequence of actions aimed at the manufacture of reinforcing core fibers and one or more reinforcing rods wound on the core to form hooks on the surface of the reinforcement.

From advertising information materials, cores and tows made of high-strength glass fibers or basalt fibers, or carbon fibers, which are bundles of threads impregnated with a polymeric binder based on epoxy, polyester or polyurethane resins, are known. The implementation of reinforcing bars from such materials is carried out using known methods and production lines for implementing the methods. At the same time, well-known from advertising materials is characterized by unwinding of roving threads, drying of roving threads, impregnation of binder threads and polymerization of a binder, and glass roving wound on creel, preheated for better adhesion of the threads to the resin, enters the impregnation bath, passing through special rings where the threads are impregnated binder. Next, in the next step, the binder is pressed back into the bath. After this, stiffeners are wound around the core of the reinforcement; under the influence of high temperatures, the binder polymerizes in the furnace. The relief acquired by the rod ensures good adhesion of the composite reinforcement to concrete when used. Further, the reinforcement is sent to the cooling bath and, passing through the shafts of the broach, is cut into segments of certain sizes.

To implement this method, an automatic line is used for the production of continuous composite reinforcement, which allows this material to be produced in parallel with two or more streams using a tubular polymerization furnace with reflectors inside. In the manufacturing process, the reinforcing bar passes along the production line through the stretcher, made in the form of tapes, grasping the bar from the sides and providing it with forward movement. A stretcher can work simultaneously with several threads (Production of composite reinforcement. Production of composite reinforcement. Ideibiznesa.org/proizvodstvo-kompozitnay-arTnatury, Yandex, 2015).

From the patent documentation, there are known methods for manufacturing composite reinforcement from roving threads impregnated with a binder, and hooks are wound onto the core of the reinforcement during its production (RU 2274715 C1. RU 2287431 C1. RU 2336169 C2. RU 2381905 C2. RU 2407759 C1. RU 2455435 C2 . RU 2210501 C1). From foreign patent documentation, manufacturing methods are known, characterized in that the reinforcing core is formed from roving threads, which are impregnated with resin, the core is pulled, hooks are formed on it, the obtained reinforcement bar is dried and cooled (UA 99794 C2, 09.09.2012. US 2012066994 A1, 03/22/2012. FR 2878456 B1, 2006-06-02).

Of the known methods, the closest to the method presented in this description is a method of manufacturing a composite reinforcement, characterized in that the core of the reinforcement is made of roving threads, for which the roving threads are dried with heated air, impregnated with a binder, the core of the reinforcement is formed from roving threads, then by windings on the core of the bundle form reinforcement hooks on the core, the resulting reinforcement blank is heated in the furnace until the binder is polymerized, and after the reinforcement exits the furnace, it is cooled (BRPI 0804730 A2, 07.20.2010 - prototype).

A significant disadvantage of the reinforcement manufactured in accordance with the prototype is that this method does not provide a clear geometry of the hooks. The hooks of the reinforcement at the outlet of the furnace turn out to be excessively merged with the core of the armature, the places of transition from the core to the hook are filled with a cured binder. During the interaction of this form of reinforcement hooks with concrete, the indicated transition points break and in their place formed between the hooks of the reinforcement and concrete, ground particles of resin and micro-voids in concrete, which are especially dangerous under bending loads on a concrete reinforced structure. During long-term operation of concrete structures working in bending, as a result of alternating loads on structures, these voids in concrete provide the possibility of micro displacements of the reinforcing bar relative to concrete in two opposite directions. In such cases, with the indicated loads, the hooks work like saw teeth, sawing in microchannels first separate microchannels, which during continuous operation of the concrete structure are connected into one channel. In this situation, the reinforcing bar is free from concrete in its longitudinal direction. In this case, concrete and reinforcement work separately in bending, which creates the danger of a complete separation of the reinforcement bar from the concrete mass of the structure. As a result, due to these shortcomings, the bearing capacity of the reinforcement does not meet the safety requirements of reinforced concrete structures. The reinforcement obtained by the above-described known method does not provide an increase in its strength due to the arbitrary choice of the ratio of the density of the core of the reinforcement and the density of bundles wound on it, due to the arbitrary arrangement of threads in the core of the reinforcement with deviations in their parallelism, uncontrolled by the polymerization process, leading to cracking, burnout and brittle binder.

As a result, the strength of the reinforcement and its bearing capacity to absorb loads in the concrete structure are significantly underestimated.

The technical result of the method is to increase the strength of the reinforcement and its bearing capacity.

The technical result is obtained by the method of manufacturing composite reinforcement, characterized in that the reinforcing core is made of roving threads, for which the roving threads are dried with heated air, impregnated with a binder, the reinforcement core is formed from roving threads, then reinforcement hooks are formed on the core by winding onto the core of the rope obtained the reinforcement blank is heated in the furnace until the binder is polymerized, and after the reinforcement exits the furnace, it is cooled, and each thread is impregnated with a binder in a divided polo When yarns are strained, each yarn is pulled after impregnation and the binder is squeezed out of it, then the impregnated yarns are longitudinally connected to the yarn bundle, the yarn bundle is pulled and the excess binder is squeezed out of the yarn bundle, while tensioning the yarn bundle, they give the impregnated yarns a position parallel to other yarns, moreover, simultaneously with the manufacture of the core of the reinforcement, dry tows are made from dry roving threads, for which each dry tow is twisted around its longitudinal axis and at the same time it is stretched in the longitudinal direction, one at the same time increase the twisting moment of the tourniquet and the tensile force and give the harness a hardness greater than the hardness of the core, and after that each dry tourniquet is wound onto the core, form a rounded core shape and protruding hooks protruding above it, then simultaneously, when each tourniquet is wound on the core, the tourniquet is pressed into the core until a groove is formed in it, in which a smaller part of the tourniquet is placed by adjusting the depth of pressing the tourniquet into the core. After the operations carried out, the obtained reinforcement blank is maintained until the harness is soaked with binder from contact with the core and, at the same time as the blank is soaked, it is moved in a furnace in which it is heated and polymerized in a wave-like fashion, while the manufactured reinforcement is gradually cooled.

In the process of moving the thread bundle into the impregnation bath, each thread in the bundle is pre-dried, heated and impregnated with a binder separately from the thread bundle, and the thread is impregnated when it is moved in a bath with a liquid binder. The binder impregnation of the rebar harnesses is carried out when it is moved in the furnace, and the degree of impregnation of the binder harness is controlled by the speed of passage of the reinforcement through the furnace. The beam is passed through the node of its tension and at the same time the excess binder is squeezed from each roving thread by pressing the thread with a plate to the squeezing rod. The binder content in the thread is controlled by the pressure force of the pressure plate and the speed of movement of the thread through the impregnation module, and with these parameters the content of the binder mass in the mass of the thread is controlled within the range of 5–25%, 95–75%.

An impregnated yarn with a specified binder content is imparted hardness, for which, after impregnation, the yarn is pulled in the longitudinal direction and at the same time as it is tensioned, the mass content of the yarn and the binder is adjusted to it, while in the process of tensioning the yarn, it is placed in a stretched state, parallel to other roving threads. The heating and polymerization of the reinforcement in the furnace is carried out in a wave-like fashion by increasing and decreasing the temperature in different sections of the furnace located along the length of the furnace. The force of pushing the tourniquet into the core is regulated by the step of winding the tourniquet onto the core, the angle of inclination of the tourniquet to the axis of the core, and the angle of coverage of the core by the tourniquet. The billet of the reinforcement is heated in the furnace until the polymerization of its binder when the rod passes through the furnace at a speed of 1.0-10.0 m / min.

In FIG. 1 shows a production line explaining the method.

In FIG. 2 is a structural diagram of a production line.

In FIG. 3 - module 10 filing roving threads.

In FIG. 4 - module 15 drying roving threads.

In FIG. 5 - modules 20 and 25 manufacturing the core of the reinforcement.

In FIG. 6 - module 30 filing threads for the manufacture of strands of reinforcement.

In FIG. 7 - module 35 winding the tow on the core.

In FIG. 8 - module 40 polymerization.

In FIG. 9 - module 45 moving reinforcement.

In FIG. 10 - module 50 cooling valves.

In FIG. 11 - receiving module 55 line.

In FIG. 12 - drum for winding reinforcement in the bay.

In FIG. 13 - flywheel of the module for winding the tow to the core.

In FIG. 14-16 flywheel with two or more tow coils.

In FIG. 17 - node distribution threads with module winding harnesses.

The method is as follows. The roving threads 2, located on the rack 3, are wound from bobbins 1 (Figs. 1, 3), divide the threads with a comb 4 to the position of their impregnation with a binder and move each thread in a bundle of threads from the location of the bobbins to the place of drying and heating of the threads.

In the process of moving the threads they are supported from sagging in the state of tension (within the allowable tensile strength) by the device 5 of the preliminary tension of the threads. Winding, moving and tensioning the strands of the beam is carried out from the inertial movement of the bundle of threads. The specified device 5 contains guides in the form of rods 6-9 (Fig. 3), enveloped by threads 2 in order to give the threads a certain trajectory of movement and pre-tension.

These operations are performed by the filament supply module 10. Module 10 is part of a production line composed of individual modules. When the filaments 2 enter the drying module (Fig. 4), each filament is dried and heated by blowing it from the bottom up by a directed stream of hot air heated within 60-90 ° C and under pressure from the heated air blowers 11 installed under the heat chamber 12. In this case, each thread is moved in the module for drying the threads away from the module 10. The threads are moved through the comb 13 and the guide-ten 14.

In another embodiment, each thread is dried and heated by contact, by dragging it through a hollow heated tube of PETN (PETN not shown). The drying operations of the threads are carried out by the drying module 15, structurally and functionally associated with the thread feeding module. This communication is carried out by means of interconnected frames of modules 10 and 15 (hereinafter, the frames are conventionally shown by vertical lines without positions), and each frame of the module has a means for adjusting the height of the frame between the floor of the workshop and the end of the frame racks to ensure the horizontal position of the fittings manufactured on lines. It is also significant that all modules of the line are interconnected by roving threads, which turn into finished reinforcement, which performs the functions of a traction element in the line in the drive for moving threads along the line, since the rigid core of the finished reinforcement is connected to the drive for moving it along the line below.

After the operation of drying the threads, they are impregnated in the bath 16 with a binder 17 (Fig. 5), for which each roving thread 2 is moved through the bath 16, in which the thread is impregnated with a binder. Impregnation is carried out by dipping each thread in a bath with a binder until it is completely immersed in a binder 17 using guide rods 18, ensuring complete immersion of the threads in the binder. Before dipping the threads into the bath, they are separated - each individual thread is pulled through comb 19 (Fig. 5) with guides. After impregnation of the threads, it is moved together with other threads away from the bath 16. The operation of impregnating the threads is carried out by the impregnation module 20.

With the module 20 (Fig. 5), the module for spinning the threads 2 from the binder is paired, spinning is carried out after impregnation and exit of the bath 16 of each thread, which is first passed through the elements 21 of the thread tension mechanism along a zigzag path. Next, excess binder is squeezed from each thread by pressing the impregnated thread with the plate 22 to the lower squeeze rod 23 and the pressure of the pressure plate is adjusted by the pressure mechanism located in the bar 23. This force controls the binder squeezing from the thread and the binder content in the thread, and the binder content is adjusted in the thread within: binder 5-25%, thread 95-75%. An impregnated yarn with a specified binder content in it is imparted hardness in the longitudinal direction, for which, after pressing the binder from it, the yarn is pulled by drive (rotation-driven) tension elements 21 to the state of the exact binder content in it. Next, the filament 2 is passed through the second comb 19 (Fig. 7) of another module and the guide 24 with holes. It is essential that after the strands 2 are pressed out in the module 25, the strands 2 are pulled and placed in a position parallel to other strands (Fig. 5). After establishing the parallelism of the threads they are passed through the guide 24 (Fig. 5), which forms from the threads 2 a blank of the core 26 of the reinforcement (Fig. 7).

In modules 25 and 35, the binder is pressed from the threads, their tension and the connection of the threads in the core 26 of the reinforcement. In the process of forming the core blank 26, the core threads 2 are joined by their sides to a bundle of threads, which is the core core blank.

Simultaneously with the execution of the above operations associated with the manufacture of the mentioned core 26 of the reinforcement, in the module 30 (Figs. 1, 6), from other roving threads 27, winding bundles 28 of the reinforcement, simultaneously several bundles 28 by means of the device described below. Each bundle 28 is made by twisting the strands 27 around the longitudinal axis of the bundle and simultaneously tensioning the strands during twisting. Twisting and tensioning of the threads 27 is carried out by the mechanism 29 of tensioning and twisting of the threads. By increasing the twisting and tensioning forces, the harness is imparted a hardness before it is wound on the core, which is greater in comparison with the hardness of the reinforcement core 26. These operations are performed in the module 30 for the manufacture of bundles 28. The bundles 28 are made dry, for which each thread 27 is fed into the module 30 in a dry state.

With one dry tourniquet 28 or several dry tourniquets, for example three tourniquets, simultaneously wrap the core blank 26 from three sides along the tourniquet perimeter of the tourniquet (Figs. 1, 7) and tourniquets 28 form a round shape of reinforcement core from it, squeezing the filaments of the core from the sides of the core to its center line, while from the bundles 28, hooks 31 of the reinforcement are formed located on the core blank 26. When forming a round shape of the core, the bundles are placed evenly around the perimeter of the core and wound onto the core with the same thrust effort. The core winding 26 is carried out by a winding device, including a flywheel 32, guides 33, a tension mechanism 34 and other elements. When each bundle 28 is wound on a core, a bundle is pressed into it until a distinct groove is formed in the core. In this case, the depth of the groove is formed by the bundle, which should be less than the height of the hook 31 from the surface of the core 26. The depth of pressing the bundle into the core is controlled by changing the tension of each bundle, changing the angle of winding of the bundle 28 on the core, equal to the angle of the bundle 28 to the longitudinal axis of the core in the process winding the tow, by changing the angle of coverage of the core with the tow, as well as by changing the speed of winding the tows on the core. These operations are performed and monitored by the harness winding module 35.

The obtained, not cured reinforcement 36 (reinforcement blank) with hooks 31 on it is moved to the cavity of the furnace 37 (Fig. 8) and, during its movement, the strands of the tow (hooks) on the core are kept until the coils are completely impregnated with binder from contact with the core. Moreover, in the process of moving the reinforcement, the turns of the bundles are impregnated and simultaneously heated in the furnace 37, which is made of separate sequentially arranged sections separated by partitions with holes in them for passage of the reinforcement. A heater 38 or a heater 39 is installed in each section separately from the others. The air in the furnace is heated by heaters 38 and 39 to a temperature of 150-400 ° C, and the valves in the furnace are heated gradually and stepwise so that in each subsequent section of the furnace the air temperature is increased or lower in comparison with the air temperature in the previous or subsequent section of the furnace. This is done in order to avoid boiling and burnout of the binder and ensuring a given polymerization mode, which provides increased strength of the binder and reinforcement. The movement of the reinforcement in the furnace is carried out until the binder is completely polymerized when the reinforcement rod passes through the furnace at a speed of 1.0-10.0 m / min. By means of controlling the impregnation of the bundle 28 on the core, the degree of impregnation of the bundle with a binder from contact with the core is controlled, and the speed of passage of the reinforcing rod through the sections of the furnace 37 is controlled. The operations of impregnating the bundle with a binder and the drying operation of the reinforcement are performed in the module 40 for drying the reinforcement, impregnating the turns of the bundles 28 and polymerization .

From the module 40, the rod of the finished reinforcement 41 (Fig. 9) is moved by the drive pairs of rollers 42 and 43 from the drive 44, which carry out the pulling of all the threads of the reinforcement, as well as pulling the uncured reinforcement 36 and the cured reinforcement 41 after the furnace through all the above modules of the production line. To carry out such a process of moving threads and reinforcement, before starting the line into operation, roving threads 2 are inserted into its corresponding modules (before starting the line into operation) to form the core of the reinforcement, as well as threads 27 to form reinforcement hooks from bundles 28. After threading, they are connected to the drive 44 and after the operations have been carried out, the drive is turned on. Depending on the activation of the drive 44, all line modules are automatically included in the work in a given sequence. The cured reinforcement 41 is moved by the reinforcement moving module 45.

By the indicated movement of the cured valve 41, it is supplied to the valve cooling module (Fig. 10), in which the valve is first cooled with warm water supplied through the pipe 46 from the pump 47. The warm water has a temperature of 16-45 ° C lower than the temperature of the hot valve leaving ovens. Then the fittings are cooled in the tank 48 with water whose temperature is less than the temperature of the cooling air, and then the fittings are cooled in the tank 49 with water whose temperature is lower than the temperature of the water in the tank 48. The cooling operations of the fittings are carried out in the valve cooling unit 50.

After cooling with water, the valve rod 41 is moved to the table of the valve receiver 51 (Fig. 11). The reinforcement intended for its trimming is directed towards the limiter 52 of the valve movement, which disables the valve moving valve and activates the cutting wheel 53. In another embodiment, when trimming the valve, the valve movement valve at the time of trimming is not turned off, because flexibility and length reinforcement allows trimming without stopping the continuous process of manufacturing reinforcement. If the reinforcement is intended for winding into a bay, then the end of the reinforcement is connected to the drive drum 54 (Fig. 12), its drive is turned on and the reinforcement is wound on the drum. In the case of winding the reinforcement on the drum, the movement of the reinforcement through all the modules of the line can be carried out from the drive rotation of the drum. Trimming the reinforcement (cutting it into segments) or winding the reinforcement into a bay on a drum is carried out by the receiving module 55.

Since each mentioned module of the line is connected to other modules of the line by an electric cable 56 (Fig. 1, 2) with the control panel 57 (Fig. 1) containing the control cabinet 58 with the control equipment 59 located in it, the control and power components of the modules are included the composition of the module 60 control the technological line, which controls all of the above operations in automatic mode. Modules 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, and 60 are interconnected into a single production line (Fig. 2) to perform coordinated actions.

It is essential that such a module 35 for winding the bundle on the core of the reinforcement (Fig. 7) is introduced into the line, which contains a flywheel 32, guides 33 and a tensioning mechanism 34, the flywheel 32 being removable and in one embodiment, one coil 1 of a winding bundle is mounted on it 28 (FIG. 13), and other removable flywheels may have several coils 1 (FIGS. 14-16), all flywheels being interchangeable. The flywheel is mounted on a hub (not shown), which is connected to the flywheel rotation drive, the flywheel being located behind the thread distributor along the direction of thread 2. On the flywheel 32, a coil 1 or several coils are rotatably mounted. During operation of the module 35, each winding bundle 28 is wound with an indentation force onto the surface of the core 26 of the valve (Fig. 17) and forms a groove in the core. The bundle coil located in the groove adheres firmly to the core at a given height of the bundle coil above the core surface, which significantly increases the adhesion strength of the bundle turns with the core and the bearing capacity of the reinforcement. It is essential that the reinforcing rods 28 are made on a separate module 35 (Fig. 1) of the production line parallel to the line in the zone between the modules 25 and 35. It is also significant that the furnace 37 is made of many interconnected sections separated by walls 61 (Fig. .8) with holes 62 in the walls 61 for passage of reinforcement through them. It is also essential that the heaters 38 and 39 are located in sections of the furnace, having different power with the possibility of separately adjusting the temperature in each section, separately from other sections, by changing the heating temperature of each heater. When the reinforcement passes through the furnace sections, the temperature in the sections is automatically wave-shaped, depending on the temperature of the connecting reinforcement to improve the polymerization process.

The reinforcement obtained by the method described above provides an increase in its strength by choosing the optimal ratio of the density of the core of the reinforcement and the density of the strands wound around the core, by increasing the parallelism of the threads in the core of the reinforcement, improving the polymerization process, eliminating cracking of the binder and maintaining its elasticity, and increasing the strength of the connection of each hook with the core at the highest height of the hook above the surface of the core, which ultimately allows to significantly increase the bearing capacity s fittings and quality.

Claims (9)

1. A method of manufacturing a composite reinforcement, characterized in that the core of the reinforcement is made of roving threads, for which the roving threads are dried with heated air, impregnated with a binder, the core of the reinforcement is formed from roving threads, then, by winding onto the core of the bundle, reinforcement hooks are formed on the core, the resulting workpiece the reinforcement is heated in the furnace until the binder is polymerized, and after the reinforcement exits the furnace, it is cooled, characterized in that each thread is impregnated with a binder in the divided position of the threads, each thread is bent after impregnation and the binder is squeezed out of it, then the impregnated threads are longitudinally connected into a bundle of strands, the bundle of strands is pulled and the excess binder is squeezed out of the bundle of strands, while tensioning the bundle of strands, the impregnated strands are given a position parallel to other threads, and By manufacturing the core of the reinforcement, dry tows are made from dry roving threads, for which each dry tow is twisted around its longitudinal axis and at the same time it is stretched in the longitudinal direction, while increasing The twisting moment of the tourniquet and the tensile force are set and give the harness a hardness greater in comparison with the hardness of the core, and after that each dry tourniquet is wound onto the core, form a rounded core shape and protruding hooks protruding above it, then simultaneously, when each tourniquet is wound on core, the tourniquet is pressed into the core until a groove is formed in it, in which a smaller part of the tourniquet is placed by adjusting the depth of the tourniquet's indentation into the core, and after the operations are carried out, the resulting rebar production until the bundles are impregnated with a binder from contact with the core and, at the same time as the billet is exposed, it is moved in a furnace in which it is heated and polymerized in a wave-like fashion, while the manufactured reinforcement is gradually cooled. 2. The method according to p. 1, characterized in that in the process of moving the thread bundle into the impregnation bath, each thread in the bundle is pre-dried, heated and impregnated with a binder separately from the thread bundle, and the thread is impregnated by moving it in a bath with a liquid binder. 3. The method according to p. 1, characterized in that the binder is impregnated with the harnesses of the reinforcement when moving it in the furnace, and the degree of impregnation of the harness with the binder is controlled by the speed of passage of the reinforcement through the furnace. 4. The method according to p. 1, characterized in that the beam is passed through the node of its tension and while squeezing the excess binder from each roving thread by pressing the thread plate to the squeeze rod. 5. The method according to p. 1, characterized in that the binder content in the thread is regulated by the pressure force of the pressure plate and the speed of movement of the thread through the impregnation module, and the binder mass in the mass of the thread is controlled by the indicated parameters within the range of 5-25% binder, thread 95 -75% 6. The method according to p. 1, characterized in that the impregnated yarn with the specified binder content is given hardness, for which, after impregnation, the yarn is pulled in the longitudinal direction and at the same time it is adjusted to the specified ratio of the mass content of the yarn and binder in it, In this process, in the process of pulling the threads, they are given, in the tensioned state, a position parallel to other roving threads. 7. The method according to p. 1, characterized in that the heating and polymerization of the reinforcement in the furnace is carried out in a wave-like manner by increasing and decreasing the temperature in different sections of the furnace located along the length of the furnace. 8. The method according to p. 1, characterized in that the force of pushing the tourniquet into the core is controlled by the step of winding the tourniquet onto the core, the angle of inclination of the tourniquet to the axis of the core and the angle of coverage of the core with the tourniquet. 9. The method according to p. 1, characterized in that the reinforcement billet is heated in the furnace until the binder is polymerized when the rod passes through the furnace at a speed of 1.0-10.0 m / min.

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