EP0277373B1 - Device for extracting water from yarn bobbins - Google Patents

Abstract

The apparatus comprises two basins (1 and 2), baskets (3) which rotate in the interior of the basins. The baskets support loaders (4) which carry the reels. The loaders are actuated by a carousel conveyor (10) which is guided in its movement upwardly and downwardly by a central column (13). The carousel conveyor may rotate an 180 DEG angle. The apparatus permits loading of the reels with yarns to be treated and unloading of reels having yarns which have alreadly been treated, thus eliminating the dead time of the different phases of operation. The apparatus is hydraulically operated, including the motion of the baskets (3) actuated by motor (18) by means of the hydraulic gearbox and electric control panel (26). The latter controls automatically by means of a logical circuit all the necessary operations for good functioning of the apparatus.

Description

The object of the present invention is to produce a machine with multiple revolving baskets intended to be used as a hydro-extractor for yarns wound on reels.

In this case, it is a machine in which yarns of wool, cotton, artificial fibers or the like, wound on bobbins must, after immersion in the dye bath, undergo a hydro-extraction in order to '' be subject to further processing work.

At present, the yarns in bobbins, at the end of the immersion operation in the dye bath, pass to the hydro-extraction station after having been placed inside rotating baskets arranged according to different circumferences which leave from the outside of said baskets and which converge towards the center.

However, this provision inevitably involves a lack of uniformity in the rate of extraction among the different coils, due not only to the fact that the outermost coils are subjected to a greater action by centrifugal force, but also to the fact that these coils are in abutment against each other.

The publication DE-C-519044 describes a centrifugal machine for the liquid treatment and for the wiping of warp beam yarns and coils.
In this machine it is provided that for the regulation of the conditions of the bath is disposed an ejector which causes the rotation of the liquid in the tank, while at the same time large quantities of liquid are inserted into the cycle.

The object of the invention is to provide a hydro-extractor for yarns in spools, provided with rotating baskets inside which are placed the spools of yarns supported by appropriate arms (which form the loaders) and allowing said spools to be move only in the radial direction by means of slots made in said arms, which slots allow, under the effect of centrifugal force, the support of the coils against the inner wall of the baskets.

According to another characteristic of the invention, it is provided that each of the assemblies comprising the rotating basket, its control shaft, the sleeve for guiding this shaft and the hydraulic motor, is suspended from a suitable elastic device supported by three series of springs working in traction, while a series of shock absorbers compensates for any imbalance in the load placed inside the rotating baskets, giving rise to a perfectly uniform and silent rotational movement even at high speeds (1500 rpm), which is particularly advantageous with regard to the efficiency of the machine and its silent nature.

According to yet another characteristic of the invention, it is provided that the reel-loaders, four in number, are supported by a hydraulically controlled carousel and constituted by a cross formed by four arms; this carousel can be lifted for the extraction, outside of the baskets, of two reel loaders already treated, turn 180 ° and descend by introducing two new loaders into the baskets and simultaneously bringing the two other baskets already treated onto a tray appropriate loading and unloading, so that during the centrifugation dead time the operator has the possibility of preparing the two subsequent loaders, by unloading them from the coils already treated and by loading them with those to be treated.

The whole assembly is of course provided with the various controls which are necessary for the automatic realization of the entire operating sequence, namely: engagement of the loaders in the rotating baskets with closing of the lids, start of the centrifugation cycle, stopping, opening of the covers and extraction of the treated magazines, rotation of the carousel with installation of new magazines to be treated, closing of the covers and beginning of a new cycle.

• La fig. 1(planche I) est une vue en élévation de l'ensemble de la machine suivant l'invention.
• La fig. 2 (planche II) est une vue en plan par dessus de cet ensemble.
• La fig. 3 (planche III) est une vue en élévation avec demi-coupe montrant la même machine.
• La fig. 4 (planche IV) est une vue de côté montrant un support propre à soutenir une bobine.
• La fig. 5 (planche V) est une coupe verticale représentant un panier tournant renfermant un chargeur avec une bobine montée verticalement.
• La fig. 6 (planche VI) est une coupe verticale d'un panier tournant montrant une variante de réalisation d'un chargeur équipé de barreaux orientés suivant des axes horizontaux.
• La fig. 7 (planche VII) est une vue de côté montrant à l'état isolé l'un des bras du chargeur suivant fig. 5.
• La fig. 8 est une vue en plan de ce bras.
• La fig. 9 en est une coupe transversale suivant le plan indiqué en IX-IX en fig. 8.
• La fig. 10 est la coupe suivant le plan X-X de fig. 8.

The machine will now be described in more detail below with the help of the attached drawing boards in which:

• Fig. 1 (plate I) is an elevational view of the entire machine according to the invention.
• Fig. 2 (plate II) is a plan view from above of this assembly.
• Fig. 3 (plate III) is an elevation view with half-section showing the same machine.
• Fig. 4 (plate IV) is a side view showing a support suitable for supporting a coil.
• Fig. 5 (plate V) is a vertical section representing a rotating basket containing a charger with a coil mounted vertically.
• Fig. 6 (plate VI) is a vertical section of a rotating basket showing an alternative embodiment of a loader equipped with bars oriented along horizontal axes.
• Fig. 7 (plate VII) is a side view showing in an isolated state one of the arms of the loader according to FIG. 5.
• Fig. 8 is a plan view of this arm.
• Fig. 9 is a cross section along the plane indicated in IX-IX in fig. 8.
• Fig. 10 is the section along the plane XX of FIG. 8.

As can be seen in fig. 1, 2 and 3 of the accompanying drawing, the machine comprises a first group formed in this case by two envelopes or fixed outer tanks referenced 1 and 2, inside which rotate the baskets 3 supporting the magazines 4 of which the covers are seen 5 and 6 in the aforementioned figures, while the other two 7 and 8 are located outside said tanks by overcoming the two other chargers which are arranged on the plate loading 9 in order to be discharged from the coils already treated and to be recharged with coils to be treated.

The covers and the chargers are mounted on a four-arm rotating carousel referenced 10, which is provided with a central shaft 11 and which is rotated by a hydraulic control cylinder 12; it is intended that the whole assembly can be raised and lowered by being guided by the column 13 with a double T profile, and this by means of an appropriate carriage 14 actuated by a hydraulic cylinder 15.

In fig. 3, it will be noted that each assembly formed by a rotary bearing 3, a loader 4, a shaft 16, a guide sleeve 17 and a hydraulic motor 18, is suspended from an oscillating frame 19 with three arms which is subjected to the action tension springs 20 allowing an elastic oscillation within certain limits. As a safety measure in the event that some of these springs break, buffers 21 are provided mounted on a fixed post on corresponding uprights 22.

Shock absorbers 23 fixed on the one hand by means of suitable staples 24 to the aforementioned uprights 22, on the other hand to spacers 25 integral with the oscillating frame 19, significantly reduce the noisiness of the mobile assembly during the centrifugation operation.

The electrical control panel 26 allows the actuation of a small hydraulic unit 27 comprising an electric motor 28, a triple pump housed inside a block of solenoid valves 29 and a heat exchanger 30 (fig. 3) for heating the oil, the latter supplying the entire installation both at low and high pressure.

In fig. 4, an embodiment of a mobile support for a coil can be seen, which support is formed by a core 31 with a frustoconical profile (this core can also be cylindrical) fixed in an elastic manner, by means of a stop 32, a spring 33 and a deformable pin 34, to the base element 35: the latter is provided with a lower guide 36 which can move inside the slots provided in the arms 37 and 38 (fig. 5) of the magazines described later in more detail, with reference to figs. 7 to 10.

According to another embodiment of the invention, provision may be made to engage the coils on radial bars 39 and 40 (FIG. 6) fixed to a central sleeve 41.

This latter arrangement makes it possible to avoid the drawbacks resulting from the deformation of the lateral surface of the coil which comes to bear against the internal wall of the rotating basket 3 under the effect of centrifugal force.

This arrangement is adopted for very delicate types of yarn.

It goes without saying that one can imagine other embodiments for the chargers.

In fig. 7 and 8, an embodiment of an arm 42 of the magazine 4 has been illustrated, which has a slot 43 which widens in the rear part 44 in order to allow the projection of the guide 36 (fig. 4) projecting downwards from the base element 35 of the spool holder support 31. FIG. 9 and 10 clearly show the cross section IX-IX, respectively X-X, of the arm 42.

Of course, the particular embodiments of the machine have been given by way of nonlimiting example, said machine obviously being able to be produced in a different way, in particular according to its capacity, that is to say the number and the volume of the coils to be treated. More specifically, the loader arms can be five, if or eight per row, while retaining the other characteristics of the machine.

The same goes for different types of chargers. All these possible embodiments of the machine should be considered to fall within the scope of claim 1.

Claims (4)

1. Water extractor for yarn on spools, specifically for the processing of yarn on spools previously dyed in dyeing vats, comprising four spool-loaders characterised by the fact that two loaders work inside rotating baskets (3), which themselves are arranged inside two vats (1 and 2) which can be closed with covers (5 and 6), whilst the other two loaders are arranged on a loading tray (9) to allow operations to offload spools which have already been treated and to load spools which are to be treated, the covers and the loaders being mounted on a carousel (10) driven by a small hydraulic unit (27) and a corresponding control console (26) suitably arranged.
2. Water extractor as per claim 1, characterised by the fact that each spool-carrier support (21) is elastically fixed with the help of a block (32), a spring (33) and an elastic pin (34) to a base element (35) with a guide underneath (36) which allows each spool to be displaced radially within a groove (43) made in each arm (42) of the loader, and the aforesaid spool is pushed by centrifugal force against the inside walls of the rotating baskets (3).
3. Water extractor as per claims 1 and 2, characterised by the fact that during the centrifuging operation, each loader operates inside its basket (3) whilst the whole assembly comprising the rotating basket (3), its loader (4), its shaft (16), the sleeve (17) for guiding the latter and the hydraulic motor (18) is suspended on a rocking structure with three arms (19) subject to the action of traction springs (20) which allows it to oscillate elastically within certain limits, and the machine further comprises, for safety's sake should some of the aforementioned springs rupture, buffers (21) permanently anchored on corresponding fittings (22) together with a shock absorber (23) fixed on the one hand by means of hooks (24) to the aforesaid fittings (22) and on the other to a cross piece (25) forming part of the rocking structure (19) in order to considerably reduce the noisiness of the whole moving assembly during the centrifuging operation even at high speeds of rotation (1500 rpm).
4. Water extractor as per claims 1 and 3, characterised by the fact that each spool-loader comprises a central core (41) on which arms (42) or bars (39 and 40) are fixed radially, on which the spools of yarn to be treated are held, and these spools are free to move radially but retained by the inside wall of the basket (3) during the centrifuging operation.

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