RU76659U1 - TECHNOLOGICAL LINE FOR PRODUCING COMPOSITE REINFORCES - Google Patents

Abstract

The utility model relates to production lines for the manufacture of reinforcing elements for reinforcing conventional and prestressed building structures. The rovings of the fibers from the bobbins 1 pass through the rollers of the leveling device 2, the annealing chamber 3, the impregnation bath 4, the tensioner, the squeezing device 6, and then through the first part of the matrix in which the slotted channel is made (Fig. 3). The thickness of the slotted channel of the matrix t is less than the diameter of the reinforcement and is (0.1 ÷ 0.7) d, and the width is (2 ÷ 10) d, where d is the diameter of the reinforcement. The matrix for manufacturability is made in the form of two plates, the distance between which is adjustable, which allows you to adjust the cross section of the formed tape. Behind the first is the second part of the device, made with a round channel, the diameter of which is (1.2 ÷ 1.5) d, where d is the diameter of the reinforcement. At the exit from the matrix to the formed reinforcing bar, winding is performed in the first device of the spiral winding 8, and then in the second device of the spiral winding 11 a secondary winding is made with a bundle.

Description

The utility model relates to production lines for the manufacture of reinforcing elements for reinforcing conventional and prestressed building structures.

A well-known production line for the manufacture of non-metallic composite reinforcement (Frolov NL "Fiberglass reinforcement and glass concrete structures", Moscow, Stroyizdat, 1980, pp. 20-24), including creel with roving bobbins, leveling device, annealing chamber, impregnating a bath with a tensioning device, an squeezing device, a molding unit with a block of dies of gradually decreasing cross-section, a spiral winding device, polymerization chambers, a pulling device, cutting and winding units of reinforcement.

The disadvantage of this line, made by spunbond technology for producing composite reinforcement (the method of "pultrusion"), is the low productivity of the line - 20 m / h.

The closest analogue is the technological line for the manufacture of composite reinforcement according to the patent of the Russian Federation No. 2287646 (publ. November 20, 2006), which includes creel with roving bobbins, leveling device, annealing chamber, impregnating bath with a tension device, squeezing device, molding unit, transverse winding device, polymerization chambers, winding units, cutting reinforcement and pulling device, and the forming unit is made in the form of a matrix with longitudinal channels mounted directly in front of the transverse zone winding at a distance from the point of winding of the braiding thread equal to (l-10) d, where d is the diameter of the reinforcement.

The disadvantage of this production line, made by bezfilerovnoy technology (the method of "needle traction"), is that the specified production line is characterized by low productivity. With an increase in the molding speed over 65 m / h, the formed core is twisted during the winding process, which leads to a deterioration in the consumer properties of the manufactured reinforcement.

The proposed utility model solves the problem of increasing the productivity of the production line, as well as the possibility of producing a new type of composite reinforcement with enhanced consumer properties.

To achieve the specified technical result in the production line for the production of composite reinforcement, including creel crest with roving bobbins, leveling device, annealing chamber, impregnating bath with a tension device, squeezing device, molding unit, spiral winding device, polymerization chambers, pulling device, cutting units and winding device profile forming is made of 2 parts, the first of which is a matrix with a slotted channel, the thickness of which is less than the diameter of the reinforcement ry and is (0.1 ÷ 0.7) d, and the width (2 ÷ 10) d, behind which the second part of the molding unit with a round channel is placed, whose diameter is (1.2 ÷ 1.5) d, where d - the diameter of the reinforcement, moreover, it is installed directly in front of the spiral winding zone, the production line is equipped with two spiral winding devices arranged in series, as well as devices to prevent twisting of fibers and the distribution of the polymer binder along the length of the reinforcement, the first channel of the molding unit being shaped, a device to prevent sk fiber knobs can be made in the form of 2 or more rollers, and the device for distributing the polymer binder along the length of the reinforcement is made of a porous material, for example, foam rubber.

Distinctive features of the proposed technological line for the manufacture of composite reinforcement from the above known, closest to it, is that the molding unit is made of 2 parts, the first of which is a matrix with a slot channel, the thickness of which is less than the diameter of the reinforcement and is ( 0.1 ÷ 0.7) d, and the width is (2 ÷ 10) d, behind which the second part of the molding unit with a round channel is placed, the diameter of which is (l, 2 ÷ l, 5) d, where d is the diameter of the reinforcement, moreover, it is installed directly in front of the spiral zone nnaya winding, the production line is equipped with two spiral winding devices arranged in series, as well as devices for preventing the twisting of fibers and the distribution of the polymer binder along the length of the reinforcement, the first channel of the molding unit is shaped, the device for preventing the twisting of fibers can be made in the form of 2 or more rollers, and the device for distributing the polymer binder along the length of the reinforcement is made of a porous material, for example, foam rubber.

Due to the presence of these signs, the productivity of the proposed production line for manufacturing composite reinforcement and the quality of the products are increased.

Figure 1 shows a diagram of a production line of increased productivity for the manufacture of embossed composite reinforcement.

Figure 2 shows a view a

Figure 3 shows a view of B

The production line for manufacturing composite reinforcement (Fig. 1) consists of sequentially installed creel with roving bobbins 1, leveling device 2, annealing chamber 3, impregnation bath 4 with tension device 5, squeezing device 6, profile forming unit 7, first spiral winding device 8, the first device for preventing the twisting of the fibers of the supporting rod 9, the first device for collecting and distributing the polymer binder along the length of the product 10, the second spiral winding device 11, the second device to prevent twisting of the fibers of the supporting rod 12, the second device for collecting and distributing the polymer binder along the length of the product 13, the polymerization chamber 14, the pulling device 15, the cutting unit 16. The profile forming unit (figure 2) consists of the first part of the matrix with the slot channel 17 and the second part of the device is a matrix with a circular channel 18. The slotted channel (Fig.3) can be made with a straight 19 and a curly 20 section.

The technological line for the manufacture of composite reinforcement of continuous relief works as follows. Rings made of glass, basalt, carbon and other fibers from bobbins 1 pass through the rollers of the leveling device 2, which separates the roving sheet into separate bundles, an annealing chamber 3, which removes moisture at a temperature of 200-250 °. Then the roving bundles enter the impregnation bath 4, filled with a polymer binder with a temperature of 40-60 °, and the tensioning device 5 with a control mechanism for the convenience of controlling the tension of the threads is located above the impregnating bath. After the impregnation bath, the roving bundles pass through an elastic squeezing device 6, then through the first part of the matrix in which the slotted channel is made (Fig. 3). The thickness of the slotted channel of the matrix t is less than the diameter of the reinforcement and is (0.1 ÷ 0.7) d, and the width is (2 ÷ 10) d, where d is the diameter of the reinforcement. The cross-sectional area of the slotted channel should be 10-30% larger than the reinforcement section. Pulling roving threads through the matrix slot allows you to form a tape, the configuration of which does not allow the twist, which is subjected to the formed reinforcing bar of circular cross section. If the matrix slit thickness is less than 0.1d, breaks of roving threads are possible. When the slit thickness is more than 0.7 d, the fibers of the reinforcing rod are twisted. The slit width equal to (2 ÷ 10) d is determined by the cross-sectional area 10-30% larger than the cross-sectional area of the reinforcement. The slotted channel may have a curved shape, which leads to the creation of a molded

web, which has greater resistance to twisting than the cylindrical shape of the rod. The matrix for manufacturability is made in the form of two plates, the distance between which is adjustable, which allows you to adjust the cross section of the formed tape. Behind the first is the second part of the device, made with a round channel, the diameter of which is (1.2 ÷ 1.5) d, where d is the diameter of the reinforcement needed to convert the flat roving tape into a cylindrical shape, convenient for forming the reinforcement profile. At the exit from the matrix onto the formed reinforcing bar, winding is performed in the first spiral winding device 8, i.e. forming a single rod, and then in the second device of the spiral winding 11 is a secondary winding with a tourniquet.

The devices for preventing the twisting of the fibers of the supporting rod 9, 12 are installed behind the spiral winding devices and are 2 or more rollers between which the formed reinforcing rod passes, which prevents the possibility of creating torques and allows you to increase the molding speed. The devices for collecting and distributing the polymer binder along the length of the product 10 and 13 are installed respectively after the device for preventing the twisting of the fibers of the supporting rod 9, 12 and redistribute the polymer binder pressed from the formed rod over the entire surface of the molded product, which allows the binder to be applied to spiral winding, i.e., to strengthen , improve the quality of the product. The winding of the formed reinforcing bar with a second bundle also serves to achieve a technical result: it prevents twisting at high speeds and, as a result, serves to increase the consumer properties of the reinforcement. Next, the formed rod with two spiral windings deposited on it passes through the polymerization chambers 14, the pulling device 15 and the cutting unit of the reinforcement 16.

On the proposed production line, composite reinforcement made of basalt fibers impregnated with a binder based on epoxy resins is manufactured.

Composite reinforcement has the following parameters:

- outer diameter 8 mm

- the conditional diameter of the first winding cord 2.5 mm

- the conditional diameter of the second winding bundle in the opposite direction of 0.5 mm

- winding pitch of the first winding 11 mm

- winding pitch of the second winding 4 mm

Modes of operation of the technological line:

- speed of the molding process 98 m / h

- revolutions of the first wrapper 148 rpm

- revolutions of the second wrapper 408 rpm

Physico-mechanical properties of composite reinforcement:

- breaking stress at break σ = 1380 MPa

- tensile modulus E = 49500 MPa.

The proposed production line allows you to eliminate the twisting of the fibers of the bearing rod of the reinforcement, to increase the speed of the molding process from 65 m / h to 98 m / h, to get a new type of embossed composite reinforcement.

Claims (4)

1. Technological line for the manufacture of composite reinforcement, including creel for hair with roving bobbins, leveling device, annealing chamber, impregnating bath with a tensioning device, squeezing device, molding unit, spiral winding device, polymerization chambers, pulling device, cutting and reeling units, characterized in that the molding unit is made of 2 parts, the first of which is a matrix with a slotted channel, the thickness of which is less than the diameter of the reinforcement and equal to (0.7 ÷ 0.1) d, and the width is (2 ÷ 10) d, for koto the swarm contains the 2nd part of the device with a round channel, the diameter of which is (1.2 ÷ 1.5) d of the diameter of the reinforcement, where d is the diameter of the reinforcement, and it is installed directly in front of the spiral winding zone, the production line is equipped with two spiral winding devices, placed sequentially, as well as devices to prevent twisting of the fibers and the distribution of the polymer binder along the length of the reinforcement. 2. The production line according to claim 1, characterized in that the first channel of the molding unit is made shaped. 3. The production line according to claim 1, characterized in that the device for preventing the twisting of fibers is made in the form of 2 or more rollers. 4. The production line according to claim 1, characterized in that the device for distributing the polymer binder along the length of the reinforcement is made of porous material.