SU1020412A1 - Method for making mineral wool slabs - Google Patents

Abstract

METHOD FOR PRODUCING MINERAL PLATES comprising forming the impregnated binder of the mineral wool mat, cold degassing it, heat treatment and cutting the carpet to the article, characterized in that in order to increase the strength of the board on the layered break before heat treatment myneralovatny carpet subjected beznitochnoy firmware with frequency shaga10 -50 mm. (L about 4

Description

The invention relates to the production of building thermal insulation materials based on mineral wool or glass wool. A known method for the production of increased-stiff mineral wool slabs, including the preparation of a saturated mineral wool bonding binder, cold prepressing of the carpet, its heat treatment in heat treatment conveyor chambers and cutting the carpet into plates of specified sizes 1J. However, the PLATES thus obtained have a layer-breaking strength of up to 0.15 kgf / cm, which in a number of cases determines the range of their application; .. Limes are also a method of producing refined fibrous products treated with needle-stitching machines, exposing the mineraloat carpet to the ground (firmware, Products obtained by this method are made without a binder and differ in insignificant strength on a layer of the gap. Most; close to that proposed by technical essence and achieved result obtaining mineral wool plates, including obtaining a mineral wool carpet impregnated with a binder, cold prepressing the carpet, cutting it, forming Heat treatment of the plates in the floor press of hot pressing and processing of the edges of the slabs of ZL. By this method, plates with high compressive strength and bending can be obtained. However, the strength of layer-by-layer rupture of such plates is low (0.1-0 , 2 kpc / cm). The purpose of the invention is to increase the strength of mineral wool plates by layer-by-layer rupture. The goal is achieved by the method of producing mineral wool boards, which includes obtaining a mineral wool carpet soaked in a binder, cold pressing it, heat treatment cutting of carpet product, mineral fiber mat before heat treatment podver gayut beznitochnoy firmware with frequency steps 10-50 mm. Example 1. A mineral wool back is impregnated with a solution of a synthetic binder — phenol alcohols at the rate of 5 phenol alcohols (by dry residue). The mineral wool carpet impregnated with a binder is subjected to cold-2 pressing with a force of 0.3 kgf / cm. After the carpet leaves the sub press driver, it is subjected to a threadless firmware by piercing the bottom with a block of special needles with notches. The distance between the needles located in the same row between the rows of 10 mm needles. When piercing the needle, the notches pick up mineral fibers located in the carpet mainly horizontally and pull them vertically through the carpet. During the reverse movement of the needles, the stretched fibers emerge from the notches and remain in the carpet, stitching its individual layers. After the carpet has moved a distance equal to the width of the block with needles, the process of piercing is repeated. Thus, the entire carpet turns out to be stitched mineral fibers with a pitch of 10 mm. The stitched carpet enters the heat treatment chamber, where it is compacted to a bulk weight of 200 kg / m and subjected to heat treatment by blowing the coolant with a temperature of 18 ° C. When this happens, the curing of the synthetic binder occurs. After leaving the heat treatment chamber, the cured carpet is cut into slabs with a size of 1000–500 mm. Example 2 The manufacture of the plates is carried out analogously to example 1, but the frequency of the firmware is 25 mm. Example 3. The manufacture of plates is carried out analogously to example 1, but with a flashing frequency of 50 mm. Example k, a mineral wool carpet impregnated with 6% binder (dry residue), is pressed with a force of 0.5 kgf / cm and subjected to pressless firmware as in Example 1 with a distance between 10 mm needles. After piercing, the carpet is cut into blanks with a size of 36001800 mm, placed on metal pallets and placed in a floor press, where the carpet is compacted to a bulk density of 250 kgf / cm and pressed at 19 ° C until the binder cures. After that, the pallets with the plates are removed from the press, the plates are separated from the pallets, cut off the edges and cut into plates of 1200-900 mm in size. Example 5. The production of plates is carried out analogously to example k, but the frequency of the firmware is 25 mm.

Example 6. The manufacture of plates is carried out analogously to Example k, but with a flashing frequency of 50 mm. With a pitch of more than 50 mm, the increase in the strength of the plates by layer-by-layer gap increases slightly.

A flashing frequency of less than 0 mm is also impractical, since a large frequency is difficult to implement technically,

The table shows the physical and mechanical properties of the plates.

Threadless carpet flashing before heat treatment increases the layer-to-layer rupture strength by a factor of 1.5–2.0, without reducing other compressive and flexural strength properties.

Increasing the strength of mineral wool plates to the layer-by-layer gap will expand the range of application of such plates (they can be used in suspended decorative acoustic structures for interior wall decoration). In addition, the necessary strength for layer-by-layer rupture in the application of the proposed method of production is provided with a lower bulk density, which in some cases; It allows to reduce the material and the cost of products.

Claims (1)

METHOD FOR PRODUCING MINERAL ORIGINAL PLATES, including obtaining a mineral wool carpet impregnated with a binder, cold pressing it, heat treatment and cutting the carpet into products, characterized in that, in order to increase the strength of the plates for layer-by-layer rupture, the mineral wool carpet is subjected to a non-threading firmware with a step frequency of 10 before heat treatment -50 mm.