JP3882225B2 - Liquid ammonia processing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the liquid ammonia treatment process of the cloth, the cloth is particularly formed between the sealing device at the cloth introduction port and the squeezing roller (padder) after passing through the liquid ammonia immersion tank and the pad from the padder to the drying drum after passing through the timing device. The present invention relates to a liquid ammonia processing apparatus that suppresses width shrinkage.
[0002]
[Prior art]
Cellulose-based fabrics are subjected to liquid ammonia treatment in a liquid ammonia processing apparatus, thereby changing the internal structure of the fiber and imparting wrinkle resistance, dimension setting properties, softness, and the like. Such liquid ammonia treatment is a liquid ammonia composed of a dipping device for dipping liquid ammonia in a cloth, a timing device for promoting the penetration and reaction of liquid ammonia, a drying device for evaporating liquid ammonia, and a steaming device for removing residual ammonia. This is generally performed in an airtight chamber of the processing apparatus (see FIG. 1). Normally, a sealing device is provided at the cloth introduction part, the intermediate partition and the cloth outlet part of the hermetic chamber of the processing apparatus to prevent leakage of ammonia gas.
[0003]
[Problems to be solved by the invention]
When the fabric formed of cellulosic fibers absorbs liquid ammonia by the above processing apparatus, the fabric is rapidly contracted and the fabric width is reduced. The amount of shrinkage tends to increase as the warp tension of the fabric increases.
In the above processing device, the shrinkage of the fabric width is most remarkable between the sealing device at the fabric inlet and the squeezing roller (padder) after passing through the liquid ammonia immersion tank and from the padder to the drying drum after passing through the timing device. There is little contraction after that. Thus, since the shrinkage amount is large in the conventional liquid ammonia processing apparatus, the finished width is insufficient in the conventional raw machine width (raw cloth width), and it is necessary to increase the raw machine width, which increases the raw machine cost.
[0004]
The present invention has been made in view of the current state of the prior art, and an object of the present invention is to provide a liquid ammonia processing apparatus that suppresses shrinkage of the cloth width in the liquid ammonia treatment process.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present inventor diligently studied a process in which the fabric width is remarkably reduced in the liquid ammonia processing, and as a result, the present invention has been completed.
[0006]
That is, the present invention is provided with a roller seal device that pressurizes two soft rubber rollers (1) at the cloth inlet, and further, the squeezing roller (3) after the roller (1) and the liquid ammonia immersion tank (2). A liquid ammonia processing apparatus provided with a cloth tension detection device (5) between the rollers (1, 3), wherein the number of rotations of the independent drive means of the rollers (1, 3) is controlled by the tension detection device (5). A timing device composed of a plurality of soft rubber rollers (6) that are sequentially driven by pressure contact with the squeezing roller (3) is provided, and a drying drum (8) is provided after the timing device. A cloth tension detection device (7) is provided between the timing device and the drying drum (8), and the rotational speeds of the independent driving means of the squeeze roller (3) and the drying drum (8) are set. A liquid ammonia processing apparatus characterized by serial controlled by the tension detecting device (7) so as to adjust the fabric tension.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The liquid ammonia processing apparatus of the present invention will be described below in comparison with a conventional apparatus. FIG. 2 schematically shows a part of a conventional liquid ammonia processing apparatus, and FIG. 3 schematically shows a part of the liquid ammonia processing apparatus of the present invention.
[0010]
In the conventional liquid ammonia processing apparatus, the cloth inlet sealing device has a smooth surface through a Teflon sheet that is wound at both ends so as to shift the position when the contact portion with the cloth is worn as shown in FIG. The metal plate is pressurized by an elastic hollow rubber tube, and the cloth travels between the Teflon sheet and the metal plate.
[0011]
Therefore, in the conventional sealing device, the cloth is pressed by the sealing portion and pulled by the squeeze roller (padder), so a large tension is applied, and when the liquid ammonia is absorbed in the liquid ammonia immersion tank, the cloth is rapidly contracted and the cloth width is reduced. It was. In addition, since the fabric receives a frictional force between the Teflon sheet and the metal plate, a delicate woven fabric was liable to cause quality accidents such as weft disturbance (displacement) and rough skin. Further, if the pressure applied to the seal portion is weakened in order to weaken the frictional force, there is a drawback that the amount of ammonia gas leaked in the hermetic chamber increases.
[0012]
In the liquid ammonia processing apparatus of the present invention, in order to eliminate the disadvantages of the conventional sealing apparatus, a roller sealing apparatus in which two soft rubber rollers (1) that are actively driven to the cloth inlet are pressed as shown in FIG. In addition, a tension detector (5) for the cloth (4) is provided between the rubber roller (1) and the squeezing roller (padder) (3) after the liquid ammonia immersion tank (2). Yes.
[0013]
By providing the tension detection device (5) in this way, the liquid ammonia processing device of the present invention can control the rotational speeds of the independent drive means of the rubber roller (1) and the squeezing roller (3). Thereby, the warp tension of the cloth is adjusted to a slight tension of about 2 kg so that the shrinkage of the cloth width can be suppressed to the minimum even when the liquid ammonia is absorbed.
[0014]
Further, in the conventional liquid ammonia processing apparatus, the timing device sends the cloth squeezed by the squeezing roller to the drying drum through a plurality of non-driven guide rollers as shown in FIG. 2 in order to promote the penetration and reaction of liquid ammonia. It is a structure that can be.
[0015]
Therefore, in the conventional timing device, tension is applied to the rotational resistance of the guide roller between the squeezing roller (padder) and the drying drum, and the contraction in the width direction of the cloth proceeds. In addition, depending on the weaving structure of the cloth, the ear tissue part of the cloth was folded or rolled at the non-contact part between the guide rollers.
[0016]
In the liquid ammonia processing apparatus of the present invention, a plurality of soft rubber rollers (6) having substantially the same circumferential length as the driving rubber roller of the squeeze roller (3) as shown in FIG. ) Are pressed in contact with each other and sequentially driven by mutual frictional force to convey the fabric in a continuous contact state.
[0017]
Although the cloth contraction also proceeds in the timing zone of the present invention, in the apparatus of the present invention, the drive of the soft rubber roller (6) is transmitted from the previous roller to the next roller with the cloth interposed therebetween, so that the longitudinal direction of the cloth The peripheral speed of the next roller is reduced by the amount of contraction, and the warp tension of the cloth in the timing zone is substantially zero.
Moreover, in the apparatus of the present invention, since the cloth is conveyed in continuous contact with the surface of the soft rubber roller (6) having a high frictional resistance, shrinkage of the cloth width can be suppressed to a minimum, and the ear tissue portion of the cloth can be suppressed. Can be prevented from being folded or wound.
[0018]
In the liquid ammonia processing apparatus of the present invention, a cloth tension detecting device (7) is also provided between the squeezing roller (3) and the drying drum (8), and the squeezing roller is provided by the tension detecting device (7). The rotational speed of the independent drive means of (3) and the drying drum (8) is controlled, and the warp tension of the cloth is adjusted to a slight tension of about 2 kg to suppress the shrinkage of the cloth width to the minimum.
[0019]
As a mechanism for controlling the rotational speed of the driving means in the present invention, any conventionally known mechanism can be adopted. For example, the mechanism described in FIG.
[0020]
In the control mechanism of FIG. 4, the tension detection roller moves up and down with the bearing as a fulcrum by the tension of the cloth, and the rotation amount of the bearing is transmitted to the encoder through the roller chain. The number of rotations of the driving means of the previous squeeze roller is controlled by this signal. For example, when the tension detection roller is lowered, the number of rotations of the squeeze roller is increased. The tension of the cloth applied to the tension detecting roller is set to the minimum tension by adjusting the air cylinder air pressure with the air pressure control valve.
[0021]
【The invention's effect】
Since the apparatus of the present invention is configured as described above, the tension of the cloth can be adjusted to a fine tension in the liquid ammonia processing, and the shrinkage of the cloth width can be minimized. Further, even a delicate woven fabric can prevent the ear tissue from being folded and wound, and can suppress quality accidents.
[Brief description of the drawings]
FIG. 1 schematically shows a conventional liquid ammonia processing apparatus.
FIG. 2 schematically shows a part of a conventional liquid ammonia processing apparatus.
FIG. 3 schematically shows a part of the liquid ammonia processing apparatus of the present invention.
FIG. 4 schematically shows an example of a mechanism for controlling the rotational speed of a driving means that can be employed in the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Soft rubber roller 2 Liquid ammonia immersion tank 3 Drawing roller 4 Cloth 5 Tension detection apparatus 6 Soft rubber roller 7 Tension detection apparatus 8 Drying drum

Claims (1)

  A roller seal device that pressurizes two soft rubber rollers (1) is provided at the cloth inlet, and a cloth is provided between the roller (1) and the squeezing roller (3) after the liquid ammonia immersion tank (2). The liquid ammonia processing apparatus provided with the tension detection device (5) of the above-mentioned, wherein the number of rotations of the independent drive means of the rollers (1, 3) is controlled by the tension detection device (5) to control the tension of the cloth. A timing device comprising a plurality of soft rubber rollers (6) that are adjusted and sequentially driven by pressure contact with the squeezing roller (3), a drying drum (8) is provided after the timing device, and a timing device; A cloth tension detection device (7) is provided between the drying drum (8) and the number of rotations of the independent driving means of the squeeze roller (3) and the drying drum (8) is determined by the tension. Liquid ammonia processing apparatus controlled by output device (7), characterized in that so as to adjust the fabric tension.

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