JPS62125065A - Apparatus for applying size to yarn in low ratio - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for applying a sizing agent to yarn at a low rate, and more specifically to a sizing agent made of a thermoplastic polymer capable of forming a water-soluble film. The present invention relates to a device for applying a sizing agent (hereinafter abbreviated as a sizing agent) to yarn at a low rate.

Conventionally, water-soluble sizing agents such as starch, carboxymethyl cellulose, polyvinyl alcohol, or water-soluble acrylic resin have been used in the process of sizing yarns. Such a water-soluble sizing agent is heated and dried before being supplied to the yarn winding beam to the weaving process.
It is necessary to completely solidify the material, and for this reason, in the conventional weaving preparation process, a heating drying step or provision of a heating drying device has been an essential requirement. Naturally, the use of such a heating drying process or heating drying device has a negative impact on promoting energy saving effects and saving floor space.

In order to avoid the above-mentioned problems associated with the use of water-soluble sizing agents, recently, thermoplastic polymers capable of forming a water-soluble film, such as paraffin wax, are used as main components, and an appropriate amount of acrylic acid is added to this. Meltable glues made from thermoplastic polymers of methyl, stearyl methacrylate, stearic acid, methacrylic acid, styrene, etc. are being used.

31bjL Marushiyoj'' Biriu One point: By using a glue made of a thermoplastic polymer having the ability to form a water-soluble film as described above, various inconveniences caused by the use of water-soluble glue can be solved. can be done, but
As a device for supplying sizing agent to yarn, for example, the Japanese Patent Publication No. 52-1
When an open type glue tank such as that described in Publication No. 0942 is used, the contact state of the threads, for example, the warp threads, with the glue carrying surface of the heating roller becomes unstable, resulting in variations in the amount of glue attached. A new problem arises in that the sizing agent is oxidized by heating.

To explain more specifically, for example, in a conventional sizing agent supply device, the yarn follows a certain traveling path perpendicular to the engagement line (so-called nip line) between the coating roll and the backup roll. Since the yarn is introduced into the sizing agent application area through the sizing agent, the pressure contact point of the yarn against the sizing agent carrying surface of the coating roll and the backup roll always occupies the same position. Therefore, only the sizing agent supported on the pressure contact point of the yarn is attached to and impregnated with the yarn, and the sizing agent supported on the surface of the roll that is removed from the pressure contact point is not applied to the yarn and is exposed to the atmosphere. When exposed to water, it oxidizes, causing changes in viscosity and chemical reaction.
It causes problems such as h. On the other hand, at the pressure contact point, the size is constantly transferred from the size carrying surface to the yarn, so the wetting characteristics of the size on the roller surface change, resulting in uneven adhesion and coating. Problems such as defects may occur. Furthermore, if the yarn runs in the same position on the coating roll and the backup roll, wear occurs only on a limited portion of the surface of these rolls, causing the problem that the sizing agent cannot be applied uniformly. . A main object of the present invention is to provide an apparatus for applying a sizing agent at a low rate, which can solidify the sizing agent at room temperature or under cooling, and can stabilize the conditions for applying the sizing agent to the yarn.

- In view of this objective, the present invention provides a tank having a built-in heating device for melting a sizing agent made of a thermoplastic polymer capable of forming a water-soluble film. (1) and a metering pump (2), and a sealed glue supply nozzle (5) connected to the glue supply device via a pipe (4) with a heat insulation jacket. ) and i! on the nozzle of the sealed glue supply nozzle! (5a) Applicator rolls (6) facing each other in contact with each other along two sides, and a thread (9) that is faster than the applicator rolls and
a coating roll (7) with a built-in heating device that rotates solidly at the same circumferential speed as the running speed of the coating roll; and a backup roll (8) that slides in sliding contact with the coating roll with its generatrix direction aligned with the coating roll and rotates at the same speed as the coating roll. and a traverse device (14) disposed on the upstream side of the engagement line between the backup roll and the coating roll (7), the gist of which is a device that applies a sizing agent to yarn at a low rate. It is something.

The plate size agent is sealed in the sealed size supply nostle (5) and the size supply device (3) in a state where it is isolated from the air until just before being sent to the yarn (9), so it is not exposed to the atmosphere. Oxidation caused by heating is effectively prevented. Furthermore, by applying traverse motion to the yarn (8), the pressure contact point of the yarn (9) formed at the engagement site between the coating roll (7) and the backup roll (8) is formed at a predetermined time period. This prevents adhesion spots, coating defects, and uneven wear of the roll due to changes in the wetting properties of the glue on the surface of the roller.

Canopy■ Figure 1 is a side view illustrating the apparatus of the present invention. In the present invention, the term "glue" refers to glue, wax, or melt,
It is also a general term for oil. Furthermore, the term "yarn" includes not only known short fiber yarns and long fiber yarns, but also carbon fiber yarns, aromatic fiber yarns, and the like. As shown in the figure, the glue supply device (3
) is heating 'AM for melting a sizing agent made of a thermoplastic polymer capable of forming a water-soluble film, for example, heating 1:
It is composed of a tank (1) containing a ram, a heating grill, or a heating stirring mechanism (all not shown), and a metering pump (2). When melting the sizing agent, an inert gas such as chlorine gas is introduced into the tank (1) to prevent oxidation of the sizing agent. The sizing agent supply device (3) needs to maintain a uniform temperature over the entire area of the sizing agent supply pipeline, taking into account that the hot-melt properties of the sizing agent change depending on the temperature. Therefore, the tank (1
) is a pipe (4) surrounded by a thermal jacket (4a)
It is connected to a sealed glue supply nozzle (5) via a. On the other hand, the sealed glue supply nozzle (5) is a glue discharge nozzle that incorporates a heating/extrusion pump and a heating source (both not shown), and is a glue discharging nozzle that includes an applicator roll (described later).
6) The upper edge of the nozzle body extending along the generatrix direction (5a
) is there a slit-shaped glue discharge? a (5b) is open. In addition, the sealed glue supply nozzle in the present invention is as follows:
In addition to a completely sealed size supply nozzle called a jet coke or fountain die, there is also a size supply nozzle (10) that traverses along the axial direction of the applicator roll (6) as illustrated in FIG. and a doctor roll (12) which is arranged opposite to the glue discharge port (11) of the supply nozzle and forms a blockage area for the glue on the surface of the applicator roll (6). It should be understood that it also includes.

An applicator roll (6) is disposed above the sealed glue supply nozzle (5) in sliding contact along the upper edge (5a) of the nozzle body. The applicator roll (6) has a cylindrical surface member made of an elastic material such as rubber or synthetic resin wound around the surface of a metal inner cylinder, and the elastic surface (6a) is It is disposed opposite to the glue supply nozzle (5) with the direction of the upper a (5a) of the nozzle body and the generatrix substantially matching. The applicator roll (6) is fitted with a sizing agent supply nozzle (5) using heat transfer from a built-in heating device or from an external heat source, such as a coating roll designated by reference number (7).
A preheating device (all not shown) is provided for heating the adhesive supplied from the sizing agent. On the other hand, diagonally above the applicator roll (6), the applicator roll (
A coating roll (7) with a built-in heating device is rotatably supported so as to be in sliding contact with the roller (7) with its generatrix line aligned with the roller (7). A surface layer made of the same elastic material as the applicator roll (6) is supported above the coating roll (7) so as to be movable up and down with its generating line aligned with that of the coating roll (7). A backup roll (8) whose peripheral wall surface is surrounded by members is rotatably supported.

The applicator roll (6), coating roll (7), and backup roll (8) are arranged in sliding contact with each other, so that the upper edge (5) of the nozzle body
It forms a transfer route for the real melt-like sizing agent discharged from the sizing agent discharge groove (5b) provided in the sizing agent discharging groove (5b) provided in the sizing agent discharging groove (5b) provided in the sizing agent discharging groove (5b) provided in the sizing agent discharging groove (5b). It is desirable to reduce the amount of application as much as possible, and for this purpose, in order to reduce the thickness of the wax coating when transferred from the applicator roll (6) to the coating roll (7),
Coating roll (7) and backup roll (
The rotational speed of each roll is adjusted so that the peripheral speed of the applicator roll (8) is higher than the peripheral speed of the applicator roll (6) and is substantially the same as the traveling speed of the yarn (9).

In this way, the true melt adhesive discharged from the adhesive discharge groove (5b) is transferred from the elastic surface (6a) of the applicator roll (6) to the coating roll (7) and back unroll (8). During the transition towards the area of sliding contact with the elastic surface (8a), the difference in the circumferential speed of these rolls and the adjusted roll gap cause a reduction in the coating thickness. Therefore, the thread (9), for example, the sliding engagement line (so-called nip line) between the coating roll (7) and the bank unroll (8), which rotate at the same speed, is set at substantially the same running speed as these rolls. The minimum amount of sizing agent is supplied to the warp threads (9) that pass through the weaving process without causing problems such as the generation of fuzz or a decrease in the morphological stability of the threads in the subsequent weaving process. be done. The amount of sizing agent applied to the yarn (9) is determined by the difference in circumferential speed of the rolls (6), (7), and (8), the amount of sizing agent supplied from the discharge groove (5b), and the applicator roll (
It can be adjusted by changing the gap between the coating roll (7) and the coating roll (7).

Note that when implementing the present invention, the use of the backup roll (8) may be omitted as an applied example. At this time,
The thread (9) is rolled by an appropriate guide device (not shown) so that the tension of the thread (9) is applied to the circumferential surface of the coating roll (7).
9) Adjust the driving route.

In order to uniformly supply the sizing agent, prevent deterioration due to oxidation, and reduce the amount of sizing agent consumed, the sizing agent application device according to the present invention includes, in addition to the above-mentioned configuration, a traverse device (
14) is provided. The traverse device has an alignment surface of the yarns (9) so as to be located upstream of the engagement MA (nip line) between the coating roll (7) and the backup roll (8) as illustrated in FIG. It is supported so as to be able to swing freely along the width direction.

The traverse device (14) supports a plurality of threads (9), (9)- running at a predetermined interval in a state separated from each other, and separates the threads (9), (91-) from each other. The yarn spacing members such as pins (15), (15), etc. or guide grooves (not shown) are connected to the traverse bar ( 16) Constructed by fixing on top.

During operation of the sizing agent applicator, for example, by transmitting driving force from a motor to the traverse bar (16) via a reciprocating device with a speed reducer (both not shown), the traverse bar (16) 9), reciprocating in a direction substantially perpendicular to the running direction of the yarn (9) with a traverse width greater than or equal to the interval (9). This traverse movement causes the threads (9), (
9)...- changes in accordance with a certain time period, and the size agent supplied onto the size agent supporting surface (7a) and the glue 8a) of the roll is uniformly spread over the threads (9), (9). ) - is attached to and impregnated with.

In addition, the surface temperature of the applicator roll (6) and coating roll (7) is determined by adjusting the temperature of the adhesive to the adhesive discharge groove (5).
In order to maintain the range suitable for spreading into a thin film over the entire region of movement from b) to the back unroller (8), the temperature is adjusted to be at least higher than the melting temperature of the glue.

Thus, when applying the sizing agent to the yarn (9), the sizing agent is heated at 80°C to 1°C.
A temperature of 50° C. and a viscosity of 20 cps to 6000 cps can be maintained.

Note that the traverse device (14) can also be used in a conventional kiss-type sizing agent application device that supplies sizing agent by lightly contacting the coating roll (7) to the yarn (9), as described above. It is possible to exhibit the function of uniformly applying the sizing agent.

As can be understood from the above explanation, by using the device of the present invention, the sizing agent is supplied to the sizing agent provided on the nozzle body kA (5a) of the sizing agent supply nozzle (5). Discharge groove (5
b) until it is fed out from the sealed glue supply nozzle (5)
And since it is sealed in the wax supply device (3) in a state where it is isolated from air, it is effectively protected from oxidation due to heating in the atmosphere. In addition, individual threads (9), (9
) - by giving a traversal motion of at least the distance between the yarn and the adjacent yarn, the wettability of the sizing agent on the surface of the coating roll (7) becomes constant, and a certain amount of the sizing agent is applied to the coating roll (7). A low percentage is applied to the surface of (7). Therefore, the entire amount of the sizing agent carried on the circumferential surfaces of the coating roll (7) and the backup roll (8) is uniformly adhered to and impregnated into the yarns (9), (9). Troubles such as defects are completely eliminated, and uneven wear of the rolls can also be prevented.

Thus, the present invention has an energy saving effect, a resource saving effect, speeding up by omitting the heat drying process of the sizing agent, and a product quality improvement effect due to uniform adhesion of the sizing agent, compared to conventional equipment.
This can have the effect of significantly raising the standard of

[Brief explanation of drawings]

FIG. 1 is a side view illustrating a device for applying a sizing agent at a low rate to yarn according to the present invention, and FIG. 2 is a plan view illustrating the structure of a main part of the traverse device. Further, FIG. 3 is a side view of the throat to the semi-hermetic coating. <1) -Tank, (2)--Constant delivery pump, (3)-Glue supply device, (4)-Vibe with thermal jacket, <5)-Sealed glue supply nozzle, (5)
a) -Tuzzle upper edge, (6)--applicator roll, (7)--coating roll, (8'')-backup roll, (9)--thread, (14)--traverse device

Claims (1)

[Claims] (1) A sizing agent supply device consisting of a tank with a built-in heating device for melting a sizing agent made of a thermoplastic polymer capable of forming a water-soluble film and a metering pump;
A sealed glue supply nozzle connected to the glue supply device via a heat-insulating jacketed pipe, an applicator roll disposed facing each other in sliding contact along the upper edge of the glue supply nozzle, and the applicator. A coating roll with a built-in heating device that slides into contact with the roll with its generatrix direction aligned and rotates at a higher speed than the applicator roll and at the same circumferential speed as the running speed of the yarn, and a coating roll with its generatrix direction aligned with the coating roll. A paste comprising: a backup roll that is in sliding contact with the coating roll and rotates at the same speed as the coating roll; and a traverse device disposed upstream of an engagement line between the backup roll and the coating roll. A device that imparts a low percentage of