EP3081679A1 - Winding machine for creating cotton wool compresses and method for compressing cotton wool - Google Patents

Abstract

The invention relates to a winding machine, the plurality of slivers are doubled and stretched together to form a wad of cotton, the formed cotton is wound on a winding tube by means of two winding rollers or at least one winding roller and a belt to cotton wool for presentation to a combing machine. The invention is characterized in that the at least one winding roller has an elastic casing or outer circumference.

Description

The invention relates to a winding machine, the plurality of slivers are doubled and stretched together to form a wad of cotton, the formed cotton is wound on a winding tube by means of two winding rollers or at least one winding roller and a belt to cotton wool for presentation to a combing machine.

Furthermore, the invention relates to a method for winding a cotton wool.

The today usual feeding of flat combing machines is done by cotton wool, which were previously produced in winding machines from individual bands. For this purpose, the winding machine receives the template in the form of, for example, 24 or 36 bands of at least one route, the template being cached in round or rectangular cans. The bands are doubled together in the winding machine and slightly stretched and thus formed the cotton. This is wound in a winding unit with at least two winding rollers by means of a sleeve to a lap roll, wherein the lap roll is pressed during the winding process with a high force of up to 15,000 N against the winding rollers. This high force is necessary to densify the batting so far that 300 m winding length can be wound into a lap roll with about 550 mm diameter. The disadvantage is that is pulled by this high force of the resulting lap roll in the gusset between the rigid winding rollers and thereby permanently deformed. The compressive force on the lap roll and the deformation cause the lap roll to warm to 40-60 ° C and thereby adhesive substances in the cotton lead to sticking of the fiber layers, resulting in a unrolling to increased hairiness. Depending on the fibers used, a reduction in the winding force can lead to the entrainment of air during the winding process, which causes air bubbles to form between the fiber layers, which causes warping and makes the winding unusable for the further combing process. This can essentially be compensated only by a lower winding speed, whereby the productivity of the combing decreases.

A further development of the classic winding process by means of winding rollers represents the tape winding technology, in which instead of the two winding rollers, a winding tape is used. The winding tape encloses the lap roll on its outer circumference depending on the embodiment at an angle of 155 ° to 270 °. The tensile force acting on the winding band acts as a winding force, which is distributed over the circumference of the wrap. The wrapping tape reduces the deformation of the lap roll to a minimum because the wrapping tape absorbs possible deformations. This has the disadvantage that the winding tapes must be replaced after a few months in operation, which is very expensive. Furthermore, the leadership and the constant voltage hold the winding tape constructive extremely expensive, which can not be compensated by the higher winding speed.

A mixture of both methods provides to produce the lap roll by means of one or two winding rollers, in which additionally a circulating belt leads the winding.

In the EP 0945080 A2 describes a winding machine in which the lap roll is produced by a circulating belt. The winding machine has a plurality of sensors and measuring devices, with which indirectly the winding diameter is determined in order to reduce the winding pressure with increasing winding diameter.

The DE 102006020586 A1 describes a method for winding cotton wool, in which by means of a speed control device for driving the winding rollers, the respective wound lap length is determined, and is assigned to a decreasing winding pressure. As the winding diameter increases, the winding pressure gradually decreases.

It is an object of the invention to provide a winding machine with which a high-quality winding can be produced inexpensively. It is another object of the invention to provide an associated method for winding slivers.

The invention solves the problem by the teaching of claim 1 and 11; Further advantageous features of the invention are characterized by the subclaims.

The object is achieved by a winding machine, the plurality of slivers are doubled and stretched together to form a wad of cotton, the formed cotton is wound on a winding tube by means of two winding rollers or at least one winding roller and a belt to cotton wool for presentation to a combing machine.

The invention is characterized in that the at least one winding roller has an elastic casing or outer circumference. Thus, the majority of the deformation work in the formation of a coil of the winding or the winding rollers is received. The resulting lap roll is thus less deformed, whereby the temperature level in the lap roll decreases. For fibers containing, for example, cotton sticky substances, the adhesion of the fiber layers is reduced, whereby the hairiness decreases. So that can the subsequent combing process can be carried out in a higher quality.

Preferably, the at least one winding roller comprises a rigid, inelastic core or carrier on which an elastic ring is arranged over the entire working width. Thus, the previous design principle of the winding machine can be maintained. When replacing a conventional winding roller, it can be replaced by the winding roller according to the invention with the same external dimensions.

In a first and third embodiment, the ring may consist of a solid plastic which has the necessary elasticity and preferably has a wear-resistant and dense surface.

According to the first embodiment, the ring may have a thickness or wall thickness of 20 to 100 mm. Thus, at least in part, the basic construction of the winding roller can be maintained. In a third embodiment, the ring may have a thickness or wall thickness of up to 200 mm, in which case the core of the winding roller can be produced as a round carrier, for example from a drawn or pressed sheet metal part.

Advantageously, the plastic ring has a Shore A hardness of 30 to 95. This results in a compromise between an elastic surface and a minimum dimensional stability, whereby the lap roll is still wound with a sufficient minimum hardness, so that the winding diameter is not too large.

In a preferred embodiment, the elastic ring has at least one over the working width extending integrated reinforcement. This can ensure that the elastic Deformation occurs almost over the entire working width of the winding roller simultaneously.

In a second embodiment, the elastic ring has a circumferential hollow chamber which is filled with a medium. Thus, on the one hand the transport and assembly of the elastic ring can be lightened, on the other hand, the hardness of the elastic ring can be adjusted via the media pressure. In particular, gaseous or liquid media come into consideration as media, wherein the hardness of the elastic ring can be adjusted via the filling pressure.

Alternatively, the medium may be a liquid whose viscosity is electrorheologically adjustable.

Preferably, in all embodiments, a thin elastic steel jacket can be pulled over the elastic ring. The steel jacket can preferably be produced from a spring steel. The metallic surface of the elastic steel jacket prevents increased adhesion of fibers to the surface.

The inventive method for winding a wadding, in which a plurality of slivers are doubled and drawn together, and the resulting cotton is wound by means of at least one winding roller on a winding tube, characterized in that before and / or during the winding process, the hardness of the shell or ., The outer circumference of the at least one winding roller is adjustable. About the hardness of the shell or the outer circumference of the winding process can be adapted to the fiber quality. For fibers with a high level of sticky substances, the winding rollers can be set more elastic than fibers that do not have these sticky substances.

Advantageously, the hardness of the at least one winding roller becomes higher as the winding process increases. In this case, the pressure of the medium, which is located in the elastic ring, can be increased, or alternatively, the viscosity of the liquid medium is increased. The lap roll can thus be wound at the end of the winding process with a greater hardness in order not to increase the overall diameter of the lap roll, for example, not over 600 mm, which would be unfavorable for the handling of the combing machine.

Figur 1:

eine schematische Darstellung einer Wickelmaschine nach dem Stand der Technik;

Figur 2:

eine Darstellung einer erfindungsgemäßen Wickelmaschine nach einer ersten Ausführungsform;

Figur 3:

eine weitere Ausführungsform einer erfindungsgemäßen Wickelmaschine;

Figur 4:

einen Schnitt durch das Profil einer Wickelwalze;

Figur 5:

einen Schnitt durch das Profil einer modifizierten Wickelwalze.

The invention will be explained in more detail with reference to the accompanying drawings. They show in:

FIG. 1:

a schematic representation of a winding machine according to the prior art;

FIG. 2:

an illustration of a winding machine according to the invention according to a first embodiment;

FIG. 3:

a further embodiment of a winding machine according to the invention;

FIG. 4:

a section through the profile of a winding roller;

FIG. 5:

a section through the profile of a modified winding roller.

In FIG. 1 a winding machine 1 is shown, as used for example in the Kämmereivorbereitung in the textile industry according to the prior art. Several slivers 3, which may consist of natural or synthetic fibers are fed via cans of the winding machine 1 and stretched in a drafting system, not shown. The slivers 3 are further passed over an inlet region 2 in the direction of material flow 7 to a plurality of pressure rollers 4a - 4c, which guide the slivers 3 in the catchment area between two winding rollers 5a, 5b and a winding tube 6 for producing a lap roll. In or on the inlet region 2, a supercharger 8 may be arranged, which makes the sliver 3 uniform. Alternatively, the lap roll can also be made between one or two winding rolls and a circulating belt.

The winding tube 6 is clamped on two side plates, not shown, at their end faces and by means of force elements, such as a hydraulic or pneumatic cylinder, not shown, pulled along a guide 9 against the winding rollers 5a, 5b. With the beginning of the winding process, the winding tube 6 in the gusset 10 of the winding rollers 5a, 5b. With increasing diameter of the lap roll 15, the winding tube 6 'removed from the gusset 10. At the same time deforms the lap roll 15 (dashed line), which is at least partially pulled into the gusset 10 due to the winding force. Due to the permanent deformation by the rotating winding rollers 5a, 5b and the rotating lap roll 15, the lap roll heats up, whereby sticky substances in the cotton lead to increased sticking of the fiber layers and thus to greater hairiness.

In order to eliminate these disadvantages, it is proposed according to the invention to make at least one of the winding rollers 5a, 5b elastic at least with their jacket or outer circumference, so that the deformation work is absorbed by the winding rollers 5a, 5b, and not by the lap roll. Preferably, both winding rollers 5a, 5b are at least partially elastic. As elastic in the context of the invention, a resilience of the surface on the shell or the outer circumference is considered, in which a lap roll of at least 300 mm diameter with a contact pressure of 15,000 N against the winding rollers 5a, 5b, a deformation of the winding rollers 5a, 5b of at least 1 mm depth causes.

In a first embodiment of the FIG. 2 the winding rollers 5a, 5b continue to consist of a rigid, round body or core 11a, 11b, but on which a ring 12a, 12b is wound from an elastic material. The body or core 11 a, 11 b may consist of a construction of steel or a light metal as before. The ring may have a thickness of 20-100 mm and a hardness of 30-95 Shore A. The ring 12a, 12b may consist of an abrasion-resistant plastic with a dense surface on which the fibers of the Cotton wool does not adhere. As materials plastics can be used from the groups of thermoplastics, elastomers and thermosets, preferably from the group of elastomers. Furthermore, the rings 12a, 12b may have an integrated reinforcement over the winding width, so that the elastic compliance does not occur only at certain points, but always over the entire working width of the winding rollers 5a, 5b. Thus, local thick spots on the lap roll 15 can be avoided.

In order to make the surface more wear-resistant and, above all, to avoid the adhesion of fiber particles as far as possible, it is provided in a further embodiment of the invention to wind a sheath 13a, 13b of thin spring steel over the elastic ring 12a, 12b. The jacket 13a, 13b may have a thickness of 0.3 to 3 mm and preferably consist of a corrosion-resistant metal.

An alternative embodiment provides to perform the ring 12a, 12b as a gas-filled tire, which optionally has an internal reinforcement by means of steel belt. This embodiment has the advantage that the hardness or elasticity of the winding roller 5a, 5b can be adjusted via the gas pressure, whereby an adaptation to different fiber qualities is possible. Particularly in the case of fiber qualities which have only little or no sticky substances, the winding rollers 5a, 5b can be set harder in order to move at possibly higher speed, since the temperature increase occurring within the lap roll 15 due to the flexing work has only a slight effect on the quality or quality Hairiness has. Furthermore, it is possible via a device for changing the gas pressure to change the hardness of the winding rollers 5a, 5b over the duration of the winding process. Thus, the lap roll 15 can be wound at the beginning with a lower hardness, and wound harder at the end of the winding process, for example, the winding diameter at the predetermined winding length of 300 m not to increase over 600 mm, which would be unfavorable for the handling of the comber.

Alternatively, the hardness of the winding rollers 5a, 5b can also be adjusted via a liquid filled in the tire, the viscosity of which can be changed, for example, electrorheologically. The embodiment with the liquid has the advantage that higher pressures can be generated with more compact components. In addition, in case of possible leaks, a hydraulic system is safer and safer in terms of fire and explosion protection. Both variants can be actively controlled by means of sensor-actuator systems and the hardness or elasticity of the winding rollers 5a, 5b can be adjusted via the winding process.

Both embodiments may also be combined with a sheath 13a, 13b of spring steel, thereby reducing fiber adhesion.

The gas- or liquid-filled ring can be produced from a plastic or rubber material, or can be produced in combination with a liquid filling of a metallic material.

In the embodiment of FIG. 3 the ring 12a, 12b made of solid rubber with a greater thickness or wall thickness, which may be up to 200 mm. The ring 12a, 12b is mounted on a support 14a, 14b, which may be similar to a rim of a pressed or drawn sheet metal part. This ring 12a, 12b can also have a hardness of 30-95 Shore A and, in addition, a reinforcement integrated over the winding width. In a further embodiment, the surface or lateral surface of the rings 12a, 12b can have a closed surface by means of chemical or thermal treatment, to which no fibers possibly adhere. Even after this Embodiment, an additional jacket with a jacket 13a, 13b made of, for example, spring steel is possible.

In FIG. 4 shows a section through a winding roller 5a, in which on a support 14a made of steel, for example, a ring 12a made of a soft plastic such as natural rubber was raised. The ring 12a made of natural rubber may, for example, have a hardness of 30 Shore A. At a contact pressure of twice 7000 N by the cylinder arranged on both sides of the guide 9, the ring 12a is pressed locally by the lap roll 15 up to 16 mm. Due to the fact that the ring 12a on the outer circumference during winding is yielding and elastic, the material of the ring 12a has to push away laterally into the end faces due to the local diameter reduction. This leads to a contour, as amplified in FIG. 4 is shown. At the edges of the winding roller 5a accumulations of material may arise, which can increase the diameter of the winding roller 5a in the form of a tip and thus damage the lap roll 15 at its edges.

To prevent this, it is provided that the ring 12a be concave on its end faces, ie thinner towards the axis of rotation of the winding roller 5a, than on the outer circumference, in order to give the material of the elastic ring 12a space for targeted deformation. The width of the winding roller 5a thus increases towards the outer circumference so that, given a local deformation of the ring 12a, a surface which remains flat over the cross section or the surface of the winding roller 5a always remains, so that the lap roll is wound over its width with a constant plane bearing surface becomes.

All embodiments have in common that the previous deformation work of the lap roll on the winding rollers 5a, 5b passes in large part, whereby the lap roll can be wound with a lower temperature level. This reduces the hairiness of the wadding and the subsequent combing process can be done in a higher quality.

With the aforementioned invention, the classic winding concept can be maintained, which keeps the maintenance vulnerability and the complexity of the system compared to a tape winder within reasonable limits. Another advantage is the retrofittability of existing winding machines, if their winding rollers 5a, 5b must be replaced due to incorrect operation or wear.

reference numeral

1

winder

2

intake area

3

sliver

4a-4c

printing rollers

5a, 5b

winding roller

6, 6 '

mandrel

7

Material flow direction

8th

supercharger

9

guide

10

gore

11a, 11b

core

12a, 12b

ring

13a, 13b

coat

14a, 14b

carrier

15

lap

Claims (12)

Winding machine, the plurality of slivers doubled and stretched together to form a wad of cotton, the formed cotton is wound on a winding tube by means of two winding rollers or at least one winding roller and a band to Wadding for presentation to a combing machine, characterized in that the at least one winding roller an elastic Has jacket or outer circumference. Winding machine according to claim 1, characterized in that the at least one winding roller comprises a rigid, inelastic core or carrier, on the over the entire working width an elastic ring is arranged. Winding device according to claim 2, characterized in that the ring consists of a solid plastic. Winding device according to claim 1 to 2, characterized in that the ring has a thickness or wall thickness of 20 to 200 mm. Winding device according to one of claims 3 to 4, characterized in that the ring of plastic has a Shore A hardness of 30 to 95. Winding device according to one of claims 1 to 5, characterized in that the elastic ring has at least one over the working width extending integrated reinforcement. Winding device according to claim 2, characterized in that the elastic ring has a circumferential hollow chamber which is filled with a medium. Winding device according to claim 7, characterized in that the hardness of the elastic ring is adjustable via the media pressure. Winding device according to claim 7, characterized in that the medium is a liquid whose viscosity is electrorheologically adjustable. Winding device according to claim 2 or 7, characterized in that on the elastic ring, a thin elastic jacket is arranged, which preferably consists of a spring steel. A method for winding a wadding, wherein a plurality of slivers are doubled and drawn together, and the resulting cotton is wound by means of at least one winding roller on a winding tube, characterized in that during the winding process, the hardness of the shell or the outer periphery of the at least one winding roller adjustable is. A method according to claim 11, characterized in that with increasing winding process, the hardness of the at least one winding roller increases.

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