RU136834U1 - TECHNOLOGICAL LINE FOR THE PRODUCTION OF REINFORCING RODS FROM COMPOSITE MATERIAL - Google Patents

Abstract

Technological line for the manufacture of reinforcement made of composite material, including creel, orientation and tension unit of reinforcing threads, a device for heating or annealing reinforcing threads, a binder impregnation unit, a forming device, a wrapper, a polymerization chamber, an abrasive application unit, a pulling and cutting device, characterized in that the abrasive application unit is installed after the winder and up to the polymerization chamber, which allows the abrasive coating to be applied to the uncured core before its polymer zatsii and fix the abrasive with the binder of the rod itself ..

Description

The utility model relates to technological lines for the manufacture of rods of composite material, namely for the manufacture of non-metallic reinforcement used for reinforcing building structures.

For good adhesion to concrete, steel reinforcement has a certain surface relief. However, the simple creation of relief on composite reinforcement is not enough, concrete does not have such adhesion to the composite as to steel.

A known production line for the manufacture of non-metallic reinforcement, including a device for supplying rods of composite material, a bath for an uncured binder, a device for applying a binder, a sand feeder and a polymerization chamber (SU 642449, class E04C 5/07, publ. 15.01.79 g .).

This production line allows you to apply an external sand (abrasive) coating on the surface of the composite reinforcement in order to improve its adhesion to concrete, as sand on the surface of the reinforcement has the same adhesive properties as sand, which is part of the concrete mix.

There is also known an installation for applying anchor hooks in the form of an abrasive coating on a reinforcing bar made of composite material, which includes a device for supplying rods with heating elements for heating them, installed along the process and connected by a drive chain conveyor, a rod stacker, a binder application unit, site for applying abrasive material (sand) and a curing (polymerization) binder furnace (RU 2203372, class E04C 5/07, publ. 2003)

A disadvantage of the known devices is that the abrasive (sand) coating is applied to the finished rod, after which the rod must again be passed through the polymerization chamber to cure the adhesive (adhesive layer) of the sand coating, and it turns out that the sand coating applied to the already cured the rod rests on it only due to the adhesive forces of the adhesive layer, the strength of which is lower than the strength of the connecting rod. In the alkaline environment of concrete, the adhesive layer under the sand coating is primarily destroyed, and it loses contact with the core.

The prototype of the proposed utility model is a production line for manufacturing reinforcement from composite material, including creel, an orienting and tensioning unit for reinforcing threads, an annealing chamber, an impregnating threads impregnating binder unit, a molding unit with a die unit and a wrapper, polymerization chambers, an abrasive application unit, a pulling device , knots for winding and cutting reinforcement (RU 2075577, class E04C 5/00, E04C 5/07, publ. 1997).

The specified production line has the same disadvantages, in addition, it has low productivity due to the additional polymerization operation after applying the abrasive.

The technical task of the proposed utility model is to create a production line of high performance, allowing to produce valves with improved consumer properties.

To obtain the specified technical result on the production line for manufacturing reinforcement from composite material, including creel, orientation and tension unit of reinforcing threads, a device for heating or annealing reinforcing threads, a binder impregnation unit, a forming device, a wrapper, a polymerization chamber, an abrasive application unit, a pulling and a cutting device according to the invention, an abrasive application unit is installed in front of the polymerization chamber.

A distinctive feature of the proposed utility model is a different procedure for performing the operation of applying an abrasive coating.

To create reliable adhesion of the reinforcing bar to concrete at the level of composite strength, the proposed production line allows abrasive (sand) coating to be applied to the surface of the bar on an uncured bar immediately after the wrapper, before the bar arrives for curing (polymerization). In this case, to obtain an abrasive coating on the rod, it is not necessary to apply an additional layer of a binder for gluing the abrasive material and it becomes possible to refuse additional polymerization chambers for curing the adhesive layer. Because sand is applied not on the finished rod, but in the process of manufacturing the rod, this allows for the same length of the line compared to the prototype to increase the productivity of the line by 2 times and get a sand coating fixed with a binder material of the rod itself.

Figure 1 shows a diagram of the proposed production line for the manufacture of reinforcing rods of composite material.

The processing line contains, sequentially installed:

1. The creel of the internal unwinding of threads, which serves to accommodate the required number of bobbins with reinforcing threads (roving).

2. The site of orientation and tension roving.

3. The device for heating the roving. It is a steel reflector with heaters installed inside.

4. Node impregnation of roving binder. It consists of a steel tank (bath) with a die holder and a frame for immersing the roving in a binder.

5. Braid device.

6. The site of application of abrasive (sand). It is a container with sand and a funnel-shaped sand collector between which a conveyor is located.

7. Polymerization chamber. Tunnel non-metallic furnace, for example, ceramic, 6.5-10 m long.

8. Control cabinet with instrumentation.

9. Rack for the tunnel furnace. It is a metal structure that serves to maintain the line units at a certain height and connect them into a single whole. The rack has power cables and a pneumatic line.

10. The device broaches reinforcement. The pulling mechanism of the belt type, the change in the speed of which is carried out due to frequency regulation.

11. Automatic cutting mechanism. It consists of meter of fittings, electric motor, spindle, horizontal and vertical movement system.

The broaching device and the cutting mechanism are mounted on a single frame.

The manufacture of rods is as follows: bobbins (glass - or basalt) roving installed on creel 1 in an amount sufficient for the manufacture of rods with a diameter of 6 mm The bath of the impregnation unit 4 is filled with a binder prepared on the basis of a resin of type ED-20 with a hardener, in the ratio specified in SU 1761903 (class E04C 5/07, published in 1992).

The roving is collected into a bundle and passed through the line devices: roving orientation and tension unit 2, roving heating device 3 and impregnation unit 4. At the exit from the impregnation unit 4, the bundle is passed through a squeezing device (not shown) that returns excess binder to the bath. Next, the threads pass through the die of the braiding device 5, after which they pass through the abrasive application unit 6, where they are sprinkled with sand. Then, the uncured rod with the sand applied to the surface enters the polymerization chamber 7. The rod being drawn is pulled by the pulling device 10. After the rod leaves the pulling device, it is cut into predetermined measured segments by the cutting device 11. The resulting reinforcing bar has a sand coating applied to the rod up to its curing. The speed of broaching in comparison with the prototype is increased by 2 times.

Sand-coated rods obtained on the proposed installation and prototype rods were accelerated by the method (Savin V.F., Blaznov A.N., Bashara V.A., Lugovoi A.N. Express method for assessing polymer resistance composite materials to the effects of alkaline environment Technique and production technology of heat-insulating materials from mineral raw materials: Reports of the VI All-Russian Scientific and Practical Conference May 31 - June 2, 2006 (Belokurikha) .- M .: FSUE TsNIIKHIM, 2006. - p.203). The sand coating applied to the already cured rod almost completely crumbled, and the sand coating of the rods made according to the claimed invention did not change.

The pull out force of concrete rods with sand glued to the cured rod (according to the prototype) is 100 kgf, which indicates a low adhesion strength of the sand coating to the core, the pull out force of concrete rods made on the proposed installation was 900 kgf.

Claims (1)

Technological line for the manufacture of reinforcement made of composite material, including creel, orientation and tension unit of reinforcing threads, a device for heating or annealing reinforcing threads, a binder impregnation unit, a forming device, a wrapper, a polymerization chamber, an abrasive application unit, a pulling and cutting device, characterized in that the abrasive application unit is installed after the winder and up to the polymerization chamber, which allows the abrasive coating to be applied to the uncured core before its polymer ation and retain abrasive connecting rod itself ..

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