TW201907070A - Washing device for cleaning textiles - Google Patents

Abstract

The invention relates to an apparatus for washing fabrics in a continuous mode and in an open mode, comprising at least a washing unit which houses a washing tank and a rinsing tank arranged in series in a working direction, and also a plurality of rollers or cylinders which define in the washing unit itself a washing path which develops in the working direction from an inlet to an outlet. Along the washing path there are spraying means comprising spraying bars provided with nozzles or, alternatively, with slits. These bars are disposed transversely to the washing path, for example substantially parallel to the rollers or cylinders. The spraying bars are restrained to the washing unit rotatably about the respective axes and are rotated during the passage of a fabric web, so that the washing and rinsing actions are distributed along sections of the washing path and not concentrated in specific areas, as in washing apparatuses according to prior art.

Description

   Washing device for washing textiles   

The present invention relates to the washing of fabrics after their weaving and printing industry processes, and more specifically, to a washing device for washing fabrics in a mode called "continuous" and "open" in this technology, which The fact that the textile passing through the washing device is completely expanded in width direction from the inlet to the outlet is individually indicated.

In industrial weaving processes, washing is required to remove impurities such as weaving residues from the original embryo or semi-finished fabric, and to remove chemicals such as caustic soda and bleach products. In the case of removing the weaving oil, the washing is more intense and a specific solvent is required, and for this reason this operation is roughly called "refining".

Washing and scouring are performed roughly before the heat setting process to avoid oxidation of the fabric fibers and accompanying yellowing.

Known washing apparatuses for fabrics include one or more washing units, the interior of which contains a bath for washing and rinsing liquids. Inside the washing unit, a drum or cylinder is rotatably mounted, which defines a textile washing path extending from the inlet to the washing unit's own outlet.

Washing is performed by a liquid such as a mixture of water with a detergent, soap and / or a solvent such as limonene, or only by water at a temperature between 20 ° C and 99 ° C. Fabric washing can be carried out by immersion in a washing liquid, which is usually first in a tank containing a mixture of water and detergent, soap and / or solvent, and then in a tank containing only water for a rinsing operation, or by means of The spray is delivered by a spray rod having a slit and / or a nozzle arranged along the washing path. A washing device using a combination of an immersion tank and a spray rod is also known.

Italian Patent No. 102013902142642 describes a machine for continuously refining textiles, which includes a washing tank suitable for containing a washing liquid and a member for heating the washing liquid. The machine further includes a plurality of drums that define a washing path along which the textile is conveyed, and a spraying member disposed along the washing path. The spray member includes first nozzles configured to emit respective fan-shaped jets for the first side of the fabric strip without overlapping, and in terms of a washing path configured to be opposite sides of the first nozzles to emit respective fan-shaped jets A second nozzle flowing to the second side of the textile opposite the first side. Similar to the first nozzle, the second nozzle is also configured to emit a fan-shaped jet stream against the second side of the textile across its entire width without overlapping.

The first and second nozzles are configured to direct the respective fan-shaped jets to the same area on the textile in transit to offset the resulting force perpendicular to the force guided by them, without the need for a support roller.

Italian Patent No. 102013902188808 describes a device for washing fabrics in a continuous and open mode, which comprises at least one processing unit, in which a plurality of cylinders defining a washing path from an inlet to an outlet are arranged. The processing unit includes first and second perforated moving surfaces configured to receive a strip of fabric to be processed sandwiched therebetween. The moving surface is supported by a set of cylinders by which it forms a closed loop path.

Similar to Italian Patent No. 102013902142642, the processing unit further includes a plurality of first and second nozzles, which are arranged along the entire washing path and face the perforated moving surface for the purpose of targeting the transferred fabrics sandwiched by it. Opposite sides deliver wash fluid. The washing fluid is provided at a pressure in the range of 5 to 50 bar, with a flow rate between 20,000 and 40,000 liters per hour per meter of fabric width. Thanks to the nozzle configuration and the high pressure and high flow rate of the washing fluid, it is possible to minimize the problems of fabric stretching and wrinkling along its washing path.

Despite the availability of machines and methods for washing and scouring fabrics in continuous and open modes, from the standpoint of both the effectiveness of removing impurities and the speed of processing, there is still a need to improve washing processes and related equipment. There is also a strong need to minimize the risk of tissue damage caused by the force applied by the wash solution.

Therefore, the technical problem proposed and solved by the present invention provides a system for washing fabrics in a continuous and open mode, which allows the above-mentioned drawbacks to be overcome with reference to the prior art.

This problem is solved by the device of claim 1.

Preferred features of the invention are defined in the dependent claims.

The device according to the invention comprises at least one washing unit in a known manner. The washing unit accommodates a washing tank and a rinsing tank arranged in series in a working direction, and also contains a plurality of drums or cylinders. The drum defines a washing path in the washing unit, and the washing path is formed from an inlet to an outlet in the processing direction. A spraying member is disposed along the washing path and includes a spraying rod having a nozzle or alternatively a slot. The rods are configured transverse to the washing path, for example substantially parallel to the drums or cylinders. The spray bars are rotatably constrained by the washing unit around respective axes, and rotate during a textile pass, so that the washing and rinsing actions are distributed along the part of the washing path, and are not the same as washing devices according to the prior art Focus on a specific area.

The main advantage provided by the present invention is that it expands the spraying radius of the spray rod, while allowing the stress on the treated textiles to be reduced.

The rotation of the spray rod is managed by an automatic control system. The direction and rotation speed of the spray rod can be controlled according to the washing needs and the type of treated fabric. The automatic control system also ensures the adjustment of the pressure and flow rate of the washing and rinsing liquid.

Another advantage provided by the present invention is that the washing apparatus can be used for both removal of processing residues from textiles, and for scouring textiles using suitable solvents.

Other advantages, features and methods of use of the present invention will be apparent from the following detailed description of several embodiments presented by means of non-limiting examples.

Reference will be made to the drawings of the drawings, in which: FIG. 1 schematically illustrates a partial side view of a washing unit according to the present invention; FIGS. 2 and 3 illustrate details of FIG. 1; and FIG. 4 illustrates FIG. 1. A cross-sectional perspective view of a spray rod of a washing system having a plurality of nozzles.

Referring to the drawings, a washing device for washing fabrics in a continuous and open mode is designated as a whole by the reference numeral 100.

The washing device 100 includes at least one washing unit 110 in a known manner, and the inside thereof contains two tanks arranged in series along a working direction indicated schematically by an arrow L.

These tanks are individually designed to contain a washing liquid 111, such as a water and limonene solution, and a washing tank 112, which is designed to contain a rinsing liquid, such as water.

FIG. 1 schematically indicates the liquid level of the liquid in each tank with a dotted line.

There are also a plurality of cylinders 113a, 113b, etc. that rotate around its own axis inside the washing unit 110, which collectively define a washing path for the fabric strip F, which is formed from the input 114 to the output 115 of the washing unit 110.

The illustrated embodiment shows two sets of cylinders, in particular three cylinders 113a, 113b, and 113c arranged corresponding to the washing tank 111 and three cylinders 113d, 113e, and 113f arranged corresponding to the rinsing tank 112.

To allow the textile F to pass through the washing unit 110, at least some of the drums are electrically powered. Preferably, all the cylinders are electrically powered in order to minimize the frictional problems of the textiles passing through, which can cause undesired elongation.

At the inlet 114 and the outlet 115 of the washing unit 110, a guide cylinder combined with a floating roller wheel mounted on the oscillating arm is also shown.

As shown in FIG. 1, according to the vertical direction V perpendicular to the longitudinal direction L, the cylinders of each assembly are arranged near the bottom of the respective tanks. Therefore, under operating conditions, the device 100 is immersed in the washing or rinsing liquid. Mode, and under the operating conditions of the device, another cylinder is separated from it and is located outside the washing liquid and the rinsing liquid. It should be understood that this configuration of the washing unit 110 allows a textile to be washed in a known manner by immersing the textile in the tanks 111, 112. In other words, the cylinder is configured such that the washing path, which is schematically shown in dotted lines, is partially formed outside the grooves 111 and 112 and partially formed inside thereof.

Preferably, the cylinders designed to run in the grooves 111, 112 have a larger diameter than the other cylinders arranged above them, thereby allowing the immersed path of the elongated fabric strip to be extended without having to increase the circle Number of tubes. This configuration also reduces stress on the textile.

The use of a cylinder having a larger diameter in the tank than the other cylinders arranged above it actually reduces the volume of liquid available for washing, which provides less need in both the washing step and the rinsing step The advantages of measuring liquid.

The washing liquid and the rinsing liquid are provided through respective tanks (not shown) of the device 100, which are connected to the tanks 111 and 112 of the washing unit 110 via suitable tubes and flange fittings 116, 117.

These tanks contain heating means in a known form, which are constructed to pre-heat the washing and rinsing liquid to a temperature suitable for the treatment intended for the particular textile, and agitator devices, such as those of the blade type, which promote liquid heating and Possible mixing of its components.

The washing liquid fed into the tanks 111, 112 is maintained at a desired temperature, such as a temperature of about 60 ° C, by means of a suitable heating member (e.g., serpentine tubes 118, 119).

More generally, the temperature of the washing and rinsing liquid is determined by the type of detergent, soap and / or solvent used and by the type of impurities that must be removed. Therefore, this is not a parameter that can be set as needed, but is determined by the operating conditions envisaged for the device 100.

The washing and rinsing liquid is purified and recirculated in the tanks 111, 112.

The device 100 also includes a plurality of spray members 120a, 120b, etc., which are arranged along the washing path in the portions above the tanks 111, 112, so that the strips of the fabric F can be treated by spraying and immersing.

The spray members 120a, 120b, etc. include a plurality of spray bars 121a, 121b, etc., which are connected to the washing unit 110 transversely to the washing path in a known manner, thereby having respective axes substantially parallel to the axis of the cylinder, Also included are individual nozzles or slits 122a, 122b, etc., which are configured to deliver a liquid jet toward the surface of the textile passing therethrough. The spray rods 121a, 121b, etc. are hollow to allow liquid to be fed to the nozzles or slits 122a, 122b, etc. through the respective connecting pieces 123a, 123b, and the like.

Fig. 4 schematically shows a spraying rod with a nozzle.

The spray member is configured to direct a liquid jet against the opposite side of the textile. For example, in the illustrated embodiment, six spray rods 121a, 121b, 121c, 121d, 121e, and 121f disposed above the washing tank 111 and three spray rods 121g disposed above the rinsing tank 112 are shown. , 121h, 121i.

It should be understood that the number of cylinders and spray bars is not a binding element of the present invention.

According to the present invention, the spray bars 121a, 121b, etc. are rotatably limited to the washing unit 110 about their respective axes, and are operatively connected to a rotary actuating member, such as a pulley bonded to its axis and connected to the washing unit Toothed belt of one or more motors.

The operation of the spray bars 121a, 121b, etc. is managed by an automatic control system for controlling the washing system 100.

The spray nozzles or slots are distributed throughout the entire side surface, both along the perimeter and in the axial direction.

In the embodiment shown in FIG. 4, the spray rod, such as the rod 121 a, has a tubular body having a square cross-section, and the nozzles 122 a are disposed on four faces of the tubular body.

In the case where the spray rod has a tubular body with a circular cross-section, the nozzles, or instead of a slot, may be spaced 90 ° along the circumference, and may be axially spaced in the length direction of the tubular body.

Thanks to the combination of this feature, the textile F is not oriented in a concentrated manner corresponding to the individual areas of the spray rods and / or individual nozzles or slits, but is oriented from time to time along the entire part during the rotation of each spray rod The distribution pattern of the influence of the jet flow of the nozzle or slot of the same textile F is treated, especially washed or rinsed.

As a result, the washing and rinsing liquid acts on more extended parts than parts that may have been treated by the fixed spray bar of the previous washing device. Therefore, the cleaning action is more effective.

In addition, due to the rotation of the spray rod, the tangential component of the force exerted by the washing and rinsing liquid on the textile F is similar to that exerted by the brush, which further increases the effectiveness of the cleaning action.

The spray rods 121a, 121b, etc. can be advantageously enclosed in the respective housings 124a, 124b, etc., which are fixed inside the washing unit 110 and have longitudinal openings 125a, 125b, etc., and are judged to allow only in the range of the spray rods. In the case where a liquid jet is delivered toward the textile F within a fixed rotation angle range, the openings are parallel to the formation direction of a single spray rod.

The angular range of the jets dispensed by each spray rod is shown schematically in FIG. 1, FIG. 2 and FIG. 3 by means of parallel filling lines.

Thanks to this configuration, it is possible to optimize the spray effect by accurately defining the affected part of the washing path.

As shown in Figs. 1 and 2, the openings of the individual housings 123a, 123b, etc. of the spray rods 121a, 121b, etc. are arranged such that the liquid jet flow from them and the washing path passing between the continuous cylinders The parts are guided consistently. In addition, the configuration of the spray rods has been determined to avoid generation between jets across the entire angle range between continuous rods facing the same side of textile F and between continuous rods facing the opposite side of textile F overlapping.

The advantage of this configuration is that it allows the washing liquid to pass through the textile F in the thickness direction by effectively removing the impurities collected in the groove below the cylinder.

In the embodiments shown in Figs. 1, 2 and 3, two spraying rods (specifically, rods 121c, 121d) are arranged in the center position between the parts of the path of the textile F, and these parts It descends and rises from the washing tank 111, respectively. The housings 124c, 124d of these spray rods are structured so as to direct the jet flow in the opposite direction toward the part of the washing path that faces downward toward the bottom of the washing tank 111 and toward the part that returns from the bottom to reach the tank 112.

The spray rod arranged above the rinsing tank 112 has a similar configuration, but there is only one spray rod between the falling and rising portions of the path of the textile F, and its casing is constructed to guide the jet in the opposite direction.

In view of the foregoing, it should be understood that due to the rotation of the spray rods 121a, 121b, etc., the delivery of the washing and rinsing liquid is intermittent, and depending on the rotation direction of the rod itself, it can be in both the feed direction of the textile F and the opposite direction Carried on. Rotation of the spray rod suitably managed by the automatic control system of the device 100 may also be performed in opposite directions in an alternating manner, for example using a cam mechanism or equivalent drive member.

This feature of the present invention, in conjunction with the washing or rinsing action distributed on the textile portion, provides excellent washing results and minimizes stress on the fabric itself.

According to another aspect of the present invention, the automatic control system of the device 100 is configured to adjust the rotation speed of the spray rods 121a, 121b, etc. according to the textile transportation speed. More specifically, depending on the type of treated fabric and the required cleaning action, it is possible to adjust the rotation speed of the spray bar so that the same part of the fabric in transit is affected by a single spray bar one or more times.

The automatic control system should also adjust the pressure and flow rate of the washing and rinsing liquid.

Overall, the washing action is thus finely adjustable, thereby allowing the quality of the treated textiles to be protected in the best possible way.

The invention has heretofore been described with reference to preferred embodiments. It should be understood that there may be other embodiments belonging to the same inventive kernel, as defined by the protection scope of the claims given below.

Claims (8)

    A washing device (100) for washing textiles in continuous mode and open mode, the washing device (100) comprises: i) at least one washing unit (110), which is provided with a washing tank (111) and a rinsing tank (112) ), The washing tank (111) is configured to receive washing liquid, the rinsing tank (112) is configured to receive washing liquid, ii) a plurality of drums or cylinders (113a, 113b, 113c, 113d, 113e, 113f), It is rotatably arranged in the washing unit around its axis, wherein the drums or cylinders define a washing path extending from the inlet (114) to the outlet of the washing unit (110), and wherein the drums or cylinders At least some of them are electric, iii) a plurality of spray rods (121a, 121b, 121c, 121d, 121e, 121f, 121g, 121h, 121i) are transverse to the washing path and are limited by the washing unit (110) These spray bars (121a, 121b, 121c, 121d, 121e, 121f, 121g, 121h, 121i) contain nozzles suitable for dispensing washing or rinsing liquid jets on the opposite side of the textile (F) transported along the washing path (122a, 122b, 122c, 122d, 122e, 122f, 122g, 122h, 122i) Or a slit, the washing device (100) is characterized in that the spray rods (121a, 121b, 121c, 121d, 121e, 121f, 121g, 121h, 121i) are rotatably restricted around the respective axes and are limited by the washing The unit (110) is operatively connected to a driving member constructed to rotate it, and the nozzles (122a, 122b, 122c, 122d, 122e, 122f, 122g, 122h, 122i) or slits are distributed in each spray The entire side surface of the rod is above and spaced in both the circumferential direction and the axial direction.         The washing device (100) according to claim 1, wherein the spray rods (121a, 121b, 121c, 121d, 121e, 121f, 121g, 121h, 121i) are enclosed in each of the units fixed to the washing unit (110). In the case (124a, 124b, 124c, 124d, 124e, 124f, 124f, 124h, 124i), each case has a longitudinal opening (125a, 125b, 125c, 125d, 125e, 125f, 125g) , 125h, 125i), which allows the liquid jet to be dispensed only within a given rotation angle range of one of these spray bars (121a, 121b, 121c, 121d, 121e, 121f, 121g, 121h, 121i).         The washing device (100) according to claim 1 or 2, wherein the spray rods (121a, 121b, 121c, 121d, 121e, 121f, 121g, 121h, 121i) are configured to wash the textile (F) during washing When passing between successive cylinders of the path, the liquid jets are directed against the textile.         The washing device (100) according to claim 3, wherein the spray bars (121a, 121b, 121c, 121d, 121e, 121f, 121g, 121h, 121i) are configured so that the same The jets dispensed by the continuous spray bars on the face do not overlap each other, and the jets dispensed by the continuous bars facing the opposite face of the textile (F) also do not overlap each other.         The washing device (100) according to any one of claims 1 to 4, further comprising an automatic control system.         The washing device (100) according to claim 5, wherein the automatic control system is configured to adjust the spray rods (121a, 121b, 121c, 121d, 121e, 121f, 121g, 121h, 121i).         The washing device (100) according to claim 5 or 6, wherein the automatic control system is configured to adjust the spray rods in the same or opposite directions relative to the moving direction of the textile (F), or in a reciprocating manner (121a, 121b, 121c, 121d, 121e, 121f, 121g, 121h, 121i).         The washing device (100) according to any one of claims 5 to 7, wherein the automatic control system is also configured to adjust the pressure and flow rate of the washing liquid and the rinsing liquid.