CS270239B2 - A cone for dyeing threads wound on a spool and for equivalent use - Google Patents

Abstract

The cone has a frusto-conical wall (2), permeable and having such a thickness that it forms along part of its length an axial through-bearing (3) for its centering on the shaft onto which the cones are slid in the dyeing device. Furthermore, the cone has an axial recess (14) formed in the end part (13) of the frusto-conical wall and an annular bottom (11). This axial recess (14) is adapted for insertion of the narrowest part (1A) of an axially adjacent cone, so that the cones slid on one and the same shaft are partially inserted into each other.

Description

The invention relates to a device for dyeing yarns on a bobbin. It relates to dyeing cones on which yarns are wound during dyeing.

Currently, traditional dyeing cones are used for dyeing yarns wound on a bobbin, formed from a perforated conical shell on which the yarn is wound into a bobbin, with several cones with corresponding yarn spools each being slid onto several relatively thin shafts with which the dyeing device is provided. The dyeing device has a container which is closed during dyeing, the shafts may be tubular or perforated to allow the dyeing liquid, pressed into the shafts, to enter from the shafts towards the atrani and into the cone cavity and then through the holes in the cones to penetrate the mass of yarn to be dyed. In other cases, these shafts have a cross-sectional shape and the dyeing liquid is supplied from below and guided in the axial direction.

These arrangements involve the use of forming discs placed between one dyeing cone and another to center them on the shafts, to maintain their mutual spacing and to support the thread spool lying above. This leads to the need for certain overall axial dimensions for each cone and therefore to dimensional losses in the dyeing containers. In addition, the preparation for dyeing is difficult to carry out and the filling of cones with interlacing discs is particularly difficult, so that the possibility of automatic filling of these traditional dyeing systems with these cones is limited.

Other solutions have been proposed using special cones which have a seat in their larger base for the cone lying below. This allows one cone to be partially inserted into the other, thereby ensuring their mutual centering and reducing the overall dimensions of the cones and coils which rest on each other, thus eliminating the possibility of winding deformations which in traditional arrangements were prevented by the presence of discs inserted between the individual cones. These discs had the function of supporting the coils at a distance from each other, in addition to centering the cones. These relatively recently proposed solutions with cones that do not require intermediate discs and allow partial axial insertion of one cone into another on one and the same shaft, however, on the one hand require the conversion of the dyeing equipment to achieve adequate dimensions of the shafts and mandrels of the thread winders for the centering requirements of these particular types of cones, and on the other hand give rise to further difficulties in performing automatic loading due to the difficulties of angular centering that is usually required for loading these cones.

The invention eliminates the above-mentioned shortcomings. The essence of which is a cone for dyeing yarns wound on a bobbin and for equivalent use, which according to the invention is characterized in that it comprises a frusto-conical wall having such a thickness that along part of its length it forms an axial through-bearing for its centering on the shaft onto which the cones are slid in the dyeing device and towards the main base it comprises an annular bottom part and a wall side part defining an axial recess for inserting the narrowest part of an axially adjacent cone, so that the cones slid on the same shaft are partially inserted into each other.

The cone according to the invention thus designed allows, on the one hand, the use of traditional equipment without changes to the shafts, so that there is no need to change the mandrels on existing winding devices for forming coils, and on the other hand, this cone allows for mounting without loss of axial dimension between adjacent coils, so that it is possible to use more coils with the same axial dimensions compared to traditional systems. In addition, all the disadvantages associated with the storage of centering and support discs and the implementation of angular centering of existing types of cones, described above in the analysis of the prior art, are eliminated. '

According to another feature of the invention, the frustoconical wall preferably has a series of longitudinal slots with a width gradually increasing outwards.

The bottom of the axial recess formed in the larger base may have an annular projection with an inner profile inclined in the manner of a neck for centering the smaller base of the lower cone. Through-holes leading to longitudinal slots may be formed around such an annular projection.

In the part adjacent to the larger base, corresponding to the recess, the side wall of the recess may be provided with slots.

CS 27o239 B2

The invention is explained in more detail in the following description on the basis of exemplary embodiments with reference to the attached drawing, in which Figs. 1 and 2 show an external view and a longitudinal section of a coloring cone according to the invention, Fig. 3 a cross-section along the plane III-III of Fig. 1 and Fig. 4 a view in the direction IV-IV of Fig. 2.

Fig. 1 shows a dyeing cone 1 with a frusto-conical wall 2 of variable thickness, which defines inside the cone 1 an axial continuous bearing 3, into which the stem of the dyeing device is inserted and through which it is guided. This frusto-conical wall 2 has longitudinal slots 5 with a radially increasing width, which gives the entire frusto-conical wall the appearance of a system of ribs J7, oriented along the surface lines of the frusto-conical surface of the cone 1. These ribs Tj, which are reinforced by a ring 9 placed in the intermediate region of these ribs, are terminated in the lower region of the cone 1, i.e. at its larger base, by a ring 11, below which a wall 13 continues along the circumference of the larger base with a relatively smaller thickness than that of the wall 2 forming the ribs 7. This wall 13 surrounds a recess 14, the bottom of which is delimited by the ring 11. Slots 15 can be formed in this wall 13, only one of which is indicated in dashed lines in Fig. 1.

The ring 11 may have holes 17 formed therein between the ribs 7 so as to allow the passage of the dyeing liquid when it is supplied from the lower part of the shaft on which the cones are mounted. The drawing shows only some of the holes 17, which, if formed, are evenly distributed.

An annular projection 19 projects from the ring 11 into the recess 14, surrounding the bearing 3, which has a guide profile on the inside, i.e. in the manner of the neck of a cylindrical-shaped cylinder shown in the drawing.

In use, several dyeing cones 1, on which the yarn to be dyed has been wound, are placed on the shaft of the dyeing device and axially pressed onto this shaft, so that the end portion 1A of the smaller cross-section of each cone fits snugly on the inside of the recess 14 of the cone placed above into the recess 14 against the ring 11. The centering of the end portion 1A is easily carried out by the projection 19, which facilitates the automatic operation of the storage. In any case, correct guidance and correct mutual storage of the stacked cones are achieved, thereby reducing the overall dimensions of the cone assembly and eliminating the need for additional elements such as shaped centering discs, which represent a major problem from the point of view of automating the method of storing the bobbins that are fed into the dyeing operation. Instead of centering discs, the recess 14 and the bottom ring 11 are used.

In order to facilitate the flow of the coloring liquid into the area of the cones in the area of the larger base, i.e. in the place where two conical surfaces are placed one above the other with a worse liquid flow, possible slots 15 facilitate this passage of the liquid.

Furthermore, when using the cones described above, it is not necessary to place the cones to be superimposed in a specific relative position, since no particular angular position or any modification of traditional machines is required.

Claims (5)

A cone for dyeing yarns wound on a bobbin and for equivalent uses, characterized in that it comprises a permeable frusto-conical wall (2) having such a thickness that it forms, along part of its length, an axial through-bearing seat (3) for its centering on a shaft onto which the cones are inserted in the dyeing device, and, towards the main base, it comprises an annular bottom part (11) and a wall side part (13) defining an axial recess (14) for inserting the narrowest part (1a) of an axially adjacent cone, so that the cones inserted on the same shaft are partially inserted into each other. CS 27o239 B2 2. The dyeing cone according to item 1, characterized in that the frustoconical wall (2) has a series of longitudinal slots (s) with a width gradually increasing outwards, 3. ' The dyeing cone according to claim 1 or 2, characterized in that an annular projection (19) with an inclined internal profile for centering guidance of the smaller base (1A) of the lower cone in the manner of a neck extends from the bottom part (11) of the axial recess (14) formed at the larger base. 4. The dyeing cone according to item 3, characterized in that through-holes (17) leading to longitudinal slots (5) are formed around said annular projection (19). 5. . The dyeing cone according to the preceding points, characterized in that it is provided with an opening (15) in the wall (13) of the recess (14).