SU1596173A1 - Method of producing mineral-wool articles - Google Patents

Abstract

The invention makes it possible to obtain a long monolithic cylinder of mineral wool boards with enhanced strength properties. In the hollow cylinders of mineral wool plate with a mounting slot along the generatrix, slot holes are made. The cylinders are assembled onto moving, slantingly stretched, pre-flattened glass fiber rovings by pressing them into the corresponding grooves. It is advisable to soak the roving before indentation with glue. 1 hp f-ly, 3 ill.

Description

The invention relates to the manufacture of heat insulating products from fibrous materials for insulating pipes, in particular, small diameters.

The purpose of the invention is to increase the strength of small-diameter products.

FIG. 1 shows a schematic of the installation; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The plant for the manufacture of mineral wool products contains a fixedly mounted on the base 1 a guide consisting of a round rod 2 and a support bar 3, respectively, serving to center the mineral wool hollow cylinders 4 along their inner diameter and along the mounting slot 5. A slide is mounted on the guide 6, pulling rovings 7 through grooves 8 and 9 located on cylindrical 10 and conic 11 rollers. Mineral hollow cylinders 4 have slit-shaped notches 12 for accommodating rovings 7.

The method is carried out as follows.

Hollow cylinders 4 are cut out of the mineral wool slab with a density of 80-180 kg / m, perpendicular to the compressed layer, and a through slot 5 is cut for mounting on the pipe, as well as slit-shaped notches 12 with a depth of 5-10 mm for assembling the hollow cylinders 4 into a long composite block. The hollow cylinders 4, after being cut, are inserted with their inner bore and mounting slot 5 onto the centering rod 2 and bar 3.

Further, from the drive of the cutting mechanism or from a separate drive (not shown), the hollow cylinders 4 are pushed along the rod 2 and the bar 3 to constitute a lengthy composite block. At the same time, a slider 6 is moved from another drive (not shown) with hooked rovings 7, which pass through the grooves 8 and 9 of the cylindrical and tapered supporting rollers 10 and 11. The passage of these grooves, rovings 7, is flattened into a strip, the width of the groove itself, 4-7 mm thick and depending on the cross section of the roving 7.

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In the process of pushing the hollow cylinders 4, the latter gradually bump into moving, obliquely stretched, flattened rovings 7 with their slit-shaped notches 12 before joining with the front of another hollow cylinder 4. The final fixation of the rovings 7 in the notches 12 is carried out by tapered rollers 11 with a groove 9, deepen in these fissure notches 12.

To preserve the straightness when assembling a lengthy product of small diameter, at least three rovings are used. For greater bonding strength, flattened roving of glass threads is impregnated with glue.

Due to the indentation and simultaneous pulling of flattened rovings along the slit-like grooves, they create an interlacing of mineral wool fibers with glass threads. Interlaced layers in slit grooves provide

with a tight circular crimping roving, which contributes to the strength and solidity of the lengthy product required. in its manufacture, transportation and installation.

Claims (2)

1. A method of manufacturing mineral wool products by molding hollow cylinders from a plate and forming an installation slot along the cylinder generator and assembling the block, characterized in that, in order to increase the strength of small-diameter products, along the generator block one performs evenly spaced one from the other slotted grooves, through which the pre-flattened rovings of glass yarns are drawn, and at the end of the block, these threads are pressed into the slot-like grooves. 2. A method according to claim 1, characterized in that the rovings are impregnated with glue before being pressed into the slot grooves. FIG. A-J ( FIG. 2