SU856823A2 - Method of pelletizing cloth moulding materials - Google Patents

Description

The invention relates to the processing of laminated press materials by pressing.

By main auto No. 735409 there is a known method of tableting tissue press materials, in which the packaging of the tissue is carried out in the form. strip by repeatedly bending along the width from edge to edge in the form of an accordion, followed by punching the hole and fastening it with a layer, applying radial cuts along the perimeter of the hole, straightening them in opposite directions and crimping with heating [1].

This method reduces the complexity of manufacturing tablets and waste tissue press materials.

However, when spreading radial cuts in opposite directions. around the rod in a stacked strip, especially if its width slightly differs from the diameter of the formed hole, transverse cracks appear2. They are formed due to the fact that the volume of material of the radial grooves of the strip, squeezed by the rod, creates pressure, i.e. bursts the surrounding material in the direction perpendicular to the axis of the rod, and cracks appear in the stacked strip, and sometimes it completely breaks in its smallest cross section.

When pressed in products from such a tablet in places of former cracks, the interlacing of tissue layers is violated, there are joints filled with resin, as a result of which the mechanical strength of the product is reduced.

The aim of the invention is to improve quality by eliminating cracks in the tablet.

This goal is achieved by the fact that before spreading the radial cuts in opposite directions, compress the tablets x the sides.

In FIG. 1 shows a packaging scheme for one or two panels together in a multilayer strip from edge to edge; in FIG. 2 - a packaged strip with a diagram of the location of the radial notches, decorated with a fastening hole in the bag and cut off with a tablet at the stamp positions; in FIG. 3 ”is the same, • with radial-shaped petals spread in the opposite direction on · 10? i cuts and compression scheme around the rod; in FIG. 4 - the same, with the layout of the punched hole, radial cuts, decorated 15 fastening holes in the bag and cut off the tablet at the positions of the stamp; in FIG. 5 ~ options for a set of folds in the cross section of the strip; in FIG. 6 is an exemplary configuration ₂ of an article for which a set of layers in a strip is preferred in a shape approaching a trapezoid; in FIG. 7 diagram of the application of notches on the cloth | fabric along the bending lines. 25 | The tabletting method is as follows.

1 cloth fabric material (one or more) from the edge 2 to the edge 3 (1) stacked skladka- _eo E into a multilayer strip in concertina.

In order to ensure an orderly distribution of folds and facilitate their laying on the material sheet 1 along the line of bends, ³⁵ incisions 4 are made along the line of bends 5 (Fig. 7).

The notches 4 can be carried out, for example, with disc scissors located at predetermined distances E.

Next, in the stamp in strip 6 make ⁹ radial cuts 7 (figure 2).

Moreover, if the tableted material is relatively loose and hard, for example fiberglass, then holes ⁴⁵ are punched before the implementation of radial cuts 7 in the strip 6 (Fig. 4).

If an impregnated cotton cloth is tableted, cutting ⁵⁰ holes 8 is not necessary.

In the same stamp, at the next position, lateral two-sided compression of the strip is carried out, after which part of the petals of the radial grooves ⁵⁵ is bent downwards and the others are bent down, as a result of which in the strip 6 there is a hole 9 ”, the threads of the material layers are intertwined around the perimeter (FIG. .3).

Then, the hole 9 is squeezed around the heated rod 10 and the heated sleeves 11 and 12, while all layers of material in the strip 6 along the contour of the hole remain entwined and glued with resin, which is impregnated with the material.

Then, along the line 13, a segment is made from the strip of the finished tablet 14 with an opening 15, which is subsequently formed when the product is pressed.

If several holes are structurally provided in the product, then several holes are punched in the tablet, and for fixing the dialed bag, as many punched holes are used as necessary to ensure a transportable tablet.

When pressing products of a complicated shape (Fig.6) from relatively low-flowing materials, for example, from fiberglass, the filler in the tablet is distributed in an orderly manner, closer to the configuration of the product. For this, the strip 6 in cross section approaches the geometric shape of the product, for example, to the trapezoid (figure 5) · I.

In the processing of non-woven materials, in which most of the fibers are located on the base, take two or more cloth panels and lay them on, alternating between the warp and the weft.

Further, the tableting process is carried out similarly to that described.

The proposed method provides good quality pressed products with a hole.

Claims (1)

This invention relates to the processing of laminated press materials by extrusion. According to the main auth. A method of tableting tissue press materials is known, in which the packaging of the tissue is carried out as. strips by bending it repeatedly across the width from edge to edge in the form of an accordion, followed by punching the hole and bonding with a layer, drawing radial slits along the perimeter of the hole, straightening them in opposite directions and crimping with heating 1}. This method reduces the laboriousness of making tablets and waste tissue press materials. However, when the radial cuts are stretched to opposite sides around the rod in the packaged strip, especially if its width differs slightly from the diameter of the shaped hole, the transverse cracks show. They are formed due to the fact that the volume of the material of the radial slits of the strip, squeezed by the rod, creates pressure, i.e. burst the surrounding material in the direction perpendicular to the axis of the rod, and cracks appear in the stacked strip, and sometimes it is completely broken in its smallest cross section. When pressed from such a tablet, in the places of the former cracks, the interlacing of layers of fabric is broken, there are joints filled with resin, as a result of which the mechanical strength of the product is reduced. The aim of the invention is to improve the quality by eliminating cracks in the tablet. The goal is achieved by compressing the pill from the sides before straightening the radial slots in opposite directions. FIG. Figure 1 shows a scheme for packing one or two panels together in a multi-layer strip from edge to edge; in fig. 2 shows a packaged strip with an arrangement of radial cut-outs, a framed fastening hole in the bag and a cut-off tablet along the die positions in FIG. 3 is the same, | With the petals of the radial pro slitting and the crimping scheme around the pivot- apart in the opposite NE direction, in FIG. A - the same, with the pattern of the location of the punched hole, the radial slits, the decorated fastening hole in the bag and the cut by the tablet at the stamp positions; in fig. 5 variants of a set of folds in a cross section of the strip in FIG. 6 illustrates an exemplary product configuration for which preferred: a set of layers in a strip in shape approaching a trapezoid; in fig. 7 shows a pattern of notches on a cloth along a bending line. The tabletting method is as follows. . A cloth of fabric material 1 (one or several) from edge 2 to edge 3 (FIG. 1) is folded with folds into a multi-layer band in the form of an accordion. In order to ensure the orderly distribution of the folds and facilitate their stacking on the panel of material 1 along the line of bends, notches are made along the line of bends 5 (Fig.7). Notches 4 can be made, for example, by disc shears located at predetermined distances. Next, in the stamp in the strip 6 make radial notching 7 (figure 2). At the same time, if the tableted material is relatively loose and hard, for example fiberglass, then before making the radial cut-outs 7, holes 8 are punched in the strip 6 (Fig.). If impregnated cotton fabric is being tabletted, it is not necessary to cut holes 8. In the same stamp, at the next position, a side two-sided compression of the strip is carried out, after which a part of the petals of the radial slots through the ONEH is bent down and the others upwards, resulting in 9 strip of the material perimeter of which are interlaced (Fig. 3). . Then, the opening 9 is compressed around the heated core 10 and the heated sleeves 11 and 12, while all layers of material in the strip 6, in the contour of the opening, remain intertwined and glued together with resin, with which the material is impregnated. Then, along line 13, a section is cut from the strip of the finished tablet 1 with an opening 15, which is subsequently extended when the product is pressed. If several openings are structurally provided in the product, several openings are punched into the tablet, while using as many punched openings as necessary to secure the assembled package as is necessary to ensure transportability of the tablet. When pressing the products of complicated form (Fig. 6) from relatively weakly flowing materials, for example from glass fabric, the filler in t is distributed in an orderly manner, closer to the configuration of the product. For this, the strip 6 in cross section approaches the geometrical shape of the product, for example, a trapezoid (Fig. 5). In the processing of nonwoven materials, in which most of the fibers are located on the base, take two or more panels of fabric and impose them, a series of the base and the weft. Next, the tableting process is carried out as described. The proposed method provides good quality extruded products with a hole. The invention of the method of tabletting tissue press materials according to ed. St. No. 735 09, characterized in that, in order to improve the quality of the tablet by eliminating cracks, before rolling out the radial slits in opposite directions, the tablet is compressed from the sides. Sources of information taken into account In the examination 1. USSR author's certificate N735 09, cl. B 29 B 1/02, 1977 Intotype. / FIG. / J f4 / / 7 L AT 5 P / S .FigL