SU914543A1 - Process for producing cylindrical products from mineral-wool web - Google Patents

Description

The invention relates to the production of thermal insulation products from. fiber material and can be used in the building materials industry.

It is known to manufacture heat $ loizolyatsionnyh tubular fibrous products in which the moving mat of fibrous material impregnated with a binder is wound on a heated rotating mandrel under my ^ vae- ¹⁰ across the mat movement. At the end of the winding, the product with the core is fed to the calibration station, where the outer diameter and configuration of the tubular product is finally set, and then to the hardening station, equipped with an electric heater, which provides curing of the surface layer of the binder. Sformovan- ₂₀ nye way products are then transmitted for final curing of the entire binder in the conventional conveyor dryer ί 0.

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The disadvantages of this method are low productivity due to the multilayer winding impregnated with a binder mat, high energy consumption for a multi-stage process of curing the binder and drying products, bulkiness and high metal consumption of devices implementing the method.

There is also known a method of forming fiber pipe insulation products. A bony structure in which a carpet impregnated with a binder is spirally wound onto a heated electrical quality *. drive roller, rotating in a stationary partially perforated shape. The binder content is 10-20%. The rolling pin fixes the inner surface of the cylinder due to the particle curing of the binder, and the stationary form fixes the outer surface, then the product is fed into the tunnel dryer of the final

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curing the binder and drying the product ^].

The disadvantages of the method are the high energy consumption of the two-stage process of drying and curing the binder, low productivity, large size and intensity of the dryer.

The closest in technical essence and the achieved result to the invention is the method of producing + mineralized wool cylinders according to the aggregate technology on the imported equipment of the firm "Ingere". The production process of products includes the manufacture of rolled mineral wool carpet, transporting and installing them on machines, cutting thin layers with band saws, shaping products by winding on a perforated rolling pin of a thin mineral wool layer treated with a binder, calibrating the cylinder, heat treatment of the product by blowing hot heat carrier, removing the product from the cleaver , transverse and longitudinal cutting £ 3].

The disadvantages of this method are in the complexity and multi-stage of the technological scheme, the need for additional production areas for transporting and storing the workpieces, low productivity due to the cyclical nature of the work and a long period of heat treatment, a significant number of service personnel and rapid wear of individual components and parts (tape saws, of the invoicing grid, etc.).

Common to all known methods is the sequential movement of a bonded fiber-impregnated carpet to the units of molding, calibration, heat treatment.

• .ί The purpose of the invention is to increase productivity and reduce energy intensity.

This goal is achieved by the fact that in the production method of cylindrical products from a fibrous carpet, mainly mineral wool, by treating it with a binder, molding the product by winding a carpet onto a rolling pin, calibrating and subsequent heat treatment, processing the fibrous carpet with a binder after forming the product _} products.

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The thickness of the binder layer should ensure its penetration into the product to a depth of 1-5 mm. Due to this, the heat treatment time of the surface peel is not more than 30-45 s, which allows significantly reducing the dimensions of the heat treatment chamber. The energy carrier consumption during heat treatment of cylinders so formed in such a way is 1.5–2 times lower than during heat treatment of cylinders wound · _; impregnated with a binder carpet /

{since there is no additional (5 full cost of heat for heating, evaporation of moisture and hardening of the binder in the fibrous mass of the material.

The proposed method is as follows.

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A conveyor belt of dry mineral wool carpet with a thickness of 40-100 mm and a width of up to 1 m guide? It is applied to the molding unit, where it is continuously wound on the rolling pin and compacted by squeezing rollers to the required density, and then fed to the surface application unit of the binder, which is applied to the 30 preform in the form of a thin, 3 mm, layer slightly diffusing into the cylinder. Next, the blank with the applied binder is fed into the heat treatment chamber, where within 30-45 s, the surface film cures ³⁵ and fixes the geometric shape of the cylinder. The formed hardened hard crust of reinforced (due to diffu;

Zi) fiber binder allows 40,

It does not retain the cylindrical shape of the products after longitudinal cutting. The opening angle of the longitudinal slit allows you to mount the product on the pipeline of the appropriate diameter.

The feed conveyor ⁴³ the mineral wool mat strip of 40-100 mm and a width of 1 m and containing up ΙΖ by weight dedusting additive (eamaslivatelya) ruloniruetsya spe cially devices ³⁸ and stored in a special room. If necessary, the roll is fed to the receiving guide assembly of the coiling device for the production

⁵⁵ thermally insulating cylindrical products, where the strip of fiber carpet is continuously wound onto a rolling pin and is continuously compacted by a crimping shaft ·

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Kami to the required density. The process is carried out as described above. Moreover, the presence of a lubricant in the material practically does not affect the time of heat treatment of the surface film, and the depth of diffusion of the binder into the material increases, which further strengthens the hardened crust. <0

The main advantages of the proposed method in comparison with the known are; a significant increase in productivity and reduction of energy consumption due to the accelerated heat treatment of the thin surface layer of the binder and the absence of the process cycle; the absence of binder and moisture in the inner layers of the cylinder, which allows us-20 to reproach the drying process and reduce energy consumption ’for evaporation of moisture and binder; the possibility of using binders in the form of commodity resins Or high concentration in order to reduce 25 energy consumption for heat treatment; the presence of a durable in-block reinforced outer shell formed by a binder that has been cured with a thin surface layer of the binder, which gives the necessary strength to the product, a smooth surface and an attractive presentation that allows you to maintain the geometric shape of the products during transportation and storage without coking; products with a smooth outer surface do not dust and do not prick, which significantly improves the working conditions of insulators and increases labor productivity during installation.

Claims (1)

Claim A method of manufacturing cylindrical products from fiber carpet, mainly from mineral wool, by treating it with a binder, shaping the product by winding a carpet onto a rolling pin, calibration and subsequent heat treatment, characterized in that, in order to increase productivity and reduce energy intensity, the fiber carpet binder is produced after molding. products, and the binder is applied to the surface of the product.