JPS60107346A - Device for uniformly distributing fluid medium - 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 Field of the Invention The present invention relates to a device for uniformly or controlled distribution of a fluid medium over a predetermined width, especially in the processing of webs.

In order to print or dye and coat strips in conventional techniques, for example in textile printing, it is necessary to distribute the application medium uniformly over the working width. Various means are known for supplying the flowable material as uniformly as possible to the outlet slit from the coating device, for example a doctor device or a nozzle.

PROBLEM TO BE SOLVED BY THE INVENTION The uniformity of the application and thus the quality of the manufactured article is highly dependent on the uniform pressure distribution of the fluid medium over the entire working width. For this purpose, a uniform amount of fluid medium must be supplied everywhere over the entire working width. This problem is extremely difficult to solve, considering that in stencil printing, for example, the working width may be wider than 5 m. Furthermore, the difficulty is even greater when applying a small amount of fluid medium to a strip-shaped article, since non-uniformity in the supply of the fluid medium becomes very noticeable.

The object of the invention is therefore to provide a device in which a uniform or controlled distribution is guaranteed.

Means of the Invention for Solving the Problems The gist of the invention for solving the above problems is to provide a device for uniformly distributing a fluid medium over a given width, which comprises a main body with a closed hollow interior. , the main body has at least one hole towards a nozzle strip connected thereto, and a device is provided in the main body for uniformly distributing the fluid medium over a predetermined width. There is a particular thing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIGS. 1 and 2 comprises a main body 1 with an interior chamber 2 in the form of a tower. A nozzle strip 3 with an outlet 4 is fixed to this main body 1 . Main body 1 and nozzle strip 3
extends over the entire width of the strip 5 to be processed. A piston 6 is inserted into the interior chamber 2 of the main body 1 and is designed as a hollow body that opens upward. This piston 6 floats on the medium 7 and by its weight forces the medium 7 present in the interior chamber 2 of the main body 1 through the hole 8 into the collecting chamber 9 of the nozzle strip 3 at a predetermined pressure. 9 through a nozzle slit 10 onto the strip 5.

A stencil 11 is placed between the nozzle slit 10 and the strip 5.
Although a stencil 11 is provided, this stencil 11 is not necessarily required. Hollow chamber 12 to change the weight of piston 6
A weight can be inserted inside, which ensures that the piston is always adapted to a suitable application medium. This is particularly important during the foaming process. This is because the viscosity varies significantly depending on the type of blowing agent, and many types of blowing agents are extremely sensitive to pressure. In order to deposit the device onto the strip 5, the nozzle strip 3 carries in its lower region a mass 13.14 of magnetizable particles. A magnetic strip (not shown) is arranged below the strip 5 and acts on the mass. 1 and 2 show different embodiments of this mass made of magnetizable material. 1st
The mass 13 shown in the figure is provided with a puck taper, by means of which a replaceable plastic sliding strip 15 is provided.
is held. Nozzle strip 3 shown in FIGS. 1 and 2
is formed as a gap doctor.

FIG. 3 shows another embodiment of the invention. In this embodiment as well, the main body 1 has a turret-shaped interior chamber 2 and a nozzle strip 3 is fixed to the main body 1 . A floating piston 16 is likewise inserted into the interior chamber 2 of the main body l, into which a flow passage i! is branched by successive divisions. δ17
is provided. Furthermore, the piston is provided with a ξ skin 18 against the wall of the interior chamber 2. The supplied medium is distributed over the entire length of the main body 1 via the flow channel 17, exits the inner chamber 2 at the lower end and then likewise flows onto the strip 5 via the bore 8, the collecting chamber 9 and the nozzle slit 10. reach.

In this case too, the stencil 11 is shown schematically. The nozzle strip 3 also carries a mass 13 of magnetizable material and is provided with a replaceable flange strip 15. Reference numeral 19 designates a holder for the device according to the invention. In this case, the nozzle strip is likewise designed as a gap doctor.

FIG. 4 shows an embodiment similar to that shown in FIGS. 1 and 2, in which an upwardly open piston 6 is inserted into the interior chamber 2 of the main body l. However, in this case the nozzle strip 3 is designed as a double doctor, with two doctor claws 20 forming an exit gap for the entry of the medium into the web 5.
is provided. Stencil 11 or strip 5 at the exit
A mass 21, also made of magnetizable material, is provided for crimping.

In one or both longitudinal walls of the main body l, branched flow channels 22 are likewise formed by continuous divisions. This possibility is only shown in FIGS. 3 and 4. Third
As shown in the figure, between the piston 16 and the longitudinal wall of the main body 1,
Branched flow passages may also be provided. In the flow passage 22,
A medium is supplied via the supply pipe 23, which is then distributed into the further flow passages and then via the passage 24 into the main body 1.
into the lower region of the inner chamber of the cell. A flat plate 25 serves to close the flow channel 22.

It is not necessarily necessary to constantly supply the medium into the interior chamber 2. The inner chamber may be filled to a predetermined height, then the piston may be inserted and the coating may be carried out until the inner chamber is empty. Since the piston extends over the entire length of the inner chamber, its weight compensates for irregularities in the surface of the medium. In that case, the piston can act not only as a compensation device but also as a control and ξ pulse generator for the blowing agent supply.

When the medium is liquid, a piston may not be used in some cases and width distribution (Breitenverteilung
) is sufficient. Width distribution and pressure must be considered when using blowing agents.

The embodiment shown in FIG. 5 includes a device inlet 38,
Coating media is supplied to this inlet 38 via a tube 36.

The inlet 38 is arranged in the center of the device and is connected to a flow channel 17 through which the medium is guided in both longitudinal directions of the device. In this flow passage 17,
A flow with a branched channel arrangement; a JIIl channel 22 is connected, the flow channels of which have an increasingly narrow diameter. At the end of the channel arrangement there are provided outlets 30 located next to each other in a row, which open into the interior chamber 2 having a width corresponding to the application width. The interior chamber 2 ends in a coating slit 28 whose edges 26,29 are applied magnetically to the stencil 11 or to the strip 5. As can be seen from FIG. 6, which shows a cross section along line A-A in FIG.
It has an extension with a pressure measuring device 27.

Further, as can be seen from FIG. 6, the flow passage 22 of the passage mechanism
are formed on the surfaces of the two members 33 and 34. In that case, one half of each flow passage is provided in the opposite: h1 member. Both iH1 can be connected to each other by gluing, screwing or otherwise. Pressure measuring device 2 in inner chamber 2
7 is arranged, with which it is possible to define and possibly control the pressure in the application medium. In this case, it must be taken into account that the conveying device is controlled by a tacho dynamo to supply a predetermined amount of application medium per unit area, and that a pressure measuring device controls the application pressure and signals errors.

A roller 31 can be inserted into the coating slit 28 in the coating area. This roller 31 preferably consists of a magnetizable material.

In this case, the roller 31 as well as the application slot 28 are pressed onto the stencil 11 or the strip 5 via a magnetic strip 37. This provides an additional application function and narrows the application slit 28. Furthermore, a strip 32 of magnetizable material can be provided in the application area, which strip 32 advantageously extends across the application slit 2 in the direction of movement in order to generate a slit-sealing force.
placed behind.

When the working speed is low, the slit 28 can be made narrow, and when the working speed is high, the slit 28 can be made relatively wide. This adaptation to the speed can also be effected by pressure. That is, when the speed is low, the pressure may be set to low, and when the speed is high, the pressure may be set to high. The apparatus may be provided with a control device for controlling the feed flow. In this case, the control device uses the adjustment reference as a starting point to increase the feed rate or the working pressure, or both, when the working speed increases and to zero when the machine is stopped.

In the embodiment shown in FIG. 7, a piston 39 floating on the surface
is listed. The pressure exerted on the medium 7 by this piston 39 may optionally be varied taking into account the properties of the medium and the application requirements.

The sealing of the application slot 28 takes place via a strip.

This can also be done with elastic claws. In the embodiment shown in FIG. 6, the application slit 28 is formed between two elastic claws.

In order to limit the application width of the device, a moving plate 37a is arranged, which closes the outlet or outlets 30 depending on its position. It is also possible to pivot the entire device around the axis 36 and lift it out of the stencil 11 or the strip.

The invention is not limited to the illustrated embodiment. For example, it is also possible to form the branching mechanism of the flow passage in a different manner. For example, a plurality of plates can be arranged in layers one above the other, and each plate can be provided with a branch stage. In short, a flow channel is formed in the plate, which is connected via the hole to a flow channel in the underlying plate.

In addition to the already mentioned configuration of the nozzle rim, namely two elastic sealing pieces, one sealing piece and one sealing strip that rests flat and exerts a relatively high pressure force, the seal Instead of a strip, two rollers may be provided, or instead of a sealing strip on one side, one roller may be used. Because of the direct application without the use of stencils, the contact surfaces of the two strips can be made very wide. This reduces the surface pressure. This is particularly advantageous for wool-like strips. It is also possible for only the front strip to be made significantly wider and the rear strip to be narrower and to be provided with a peeling edge. This is particularly advantageous for coatings.

EFFECTS OF THE INVENTION According to the measures of the invention, the fluid medium is uniformly spread over a flat surface, strip, roller or the like, even if the consumption rate fluctuates; Only one quantity of media to be applied needs to be actually prepared, thus minimizing losses of media during interruptions or terminations of the application process.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a first embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of a second embodiment of the present invention, and FIG. 3 is a vertical cross-sectional view of a third embodiment of the present invention. 4 is a vertical sectional view of the fourth embodiment of the present invention, FIG. 5 is a partial view of the fifth embodiment of the present invention, and FIG.
A cross-sectional view taken along the line A--A in the figure, and FIG. 7 is a partial cross-sectional view of a sixth embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Main body, 2... Inner chamber, 3... Nozzle strip,
4... Outlet, 5... Strip-like product, 6... Piston, 7
... Medium, 8 ... Hole, 9 ... Collection chamber, 10 ... Nozzle slit, 11 ... Stencil, 12 ... Hollow'
M, 13. , 14...Mass body, 15...Sliding strip,
16... Piston, 17... Flow passage, 18... Packing, 19... Holder, 20... Doctor claw, 21...
...Mass body, 22..Nine flow passages, 23.. Supply pipe, 2
4... Passage, 25... Board, 26... Edge, 27...
・Pressure measuring device, 28... Application slit, 29... Edge,
30... Outlet, 31... Roller, 32... Strip,
33.34... Member, 35... Pipe, 36... Shaft,
37... Magnet strip, 37a... Moving plate, 38...
Inlet, 39... Piston Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A device for uniformly distributing a fluid medium in any width, in which a body (1) with a closed hollow interior chamber (2) is provided, the body (1) has at least one hole (8) towards the nozzle strip (3) connected thereto.
and within the main body (1) there are devices (6, 16, 17,
22) A device for uniformly distributing a fluid medium, characterized in that it is provided with: 2 The inner chamber (2) is formed into a tank shape, and the inner chamber (2)
2. Device according to claim 1, in which the piston (6, 16, 38) is movably arranged. 3 In the lower area of the inner chamber (2) there is a chamber for media (2).
4, 30) is open and the inner chamber ((2) is connected to the outlet area of the nozzle strip (3).
The device according to paragraph 2 or paragraph 2. 4. Device according to one of the claims 1 to 3, characterized in that the piston (6, 38) is formed as a hollow body that is open upwards. 5. The device according to any one of claims 1 to 4, characterized in that a member for applying pressure is provided inside the piston (6, 38). A 62" stone (16) is formed as an internal body and has a feed section and a flow channel (16) branched off by continuous division.
17) (iii), and the last flow passage opens into the inner chamber of the main body.
The apparatus described in any one of the preceding paragraphs. 7. In at least one longitudinal wall of the main body (1), a feed section and a flow channel (22) branched off by a continuous division are formed, which flow channel is covered by a plate (25). An apparatus according to any one of claims 1 to 6. 8. Device according to one of the claims 1 to 7, characterized in that the interior chamber (2) has an air cushion in its upper region. 9. Any one of claims 1 to 8, in which a pressure measuring device (27) is inserted into the inner chamber (2).
Apparatus described in section. 10. Device according to any one of claims 1 to 9, characterized in that the pressure measuring device (27) is arranged in the outflow gap (28). 11. Device according to one of the claims 1 to 10, characterized in that the pressure measuring device (27) is arranged in the main supply conduit (35) before the inlet into the branch system. . 12. Device according to claim 10 or 11, in which the pressure measuring device (27) is connected to a supply device for generating or defining pressure. 13. A mass (13, 14, 26) of magnetizable material is provided in the nozzle strip (3), which is used to press the nozzle strip (3) onto the strip (5). An apparatus according to any one of claims 1 to 12, wherein a magnetic source is placed opposite the mass body. 14. Device according to claim 9, characterized in that the magnetizable material which produces the slit sealing force is arranged in the application area behind the slit (28) in the direction of movement. 15. Device according to any one of claims 1 to 14, in which the slit is narrow in devices for low speeds. 16. The device according to any one of claims 1 to 15, in which the slit is wide in devices for high speeds. 17. The device according to any one of claims 1 to 16, in which the pressure is low for devices for low speeds. 18. The device according to any one of claims 1 to 17, in which the pressure is increased. 19 Claim 1, which is provided with a control device for controlling the supply amount, which increases at least either the supply amount or the working ratio when the working speed increases, using the adjustment reference as a starting point, and reduces it to zero when the machine stops. 19. The device according to any one of paragraphs 1 to 18. 20. Device according to one of the claims 1 to 19, characterized in that the nozzle strip (3) is designed as a gap dot. 21. Device according to one of the claims 1 to 20, characterized in that the nozzle strip (3) is designed as a double doctor. 22. Device according to one of the claims 1 to 21, characterized in that the outer edge of the slit is formed by a sealing strip. 23. Device according to any one of claims 1 to 22, characterized by a relatively high pressure force, in which the edge of the slit is in planar contact with one sealing piece. 24. The device according to any one of claims 1 to 23, wherein the edge of the slit is formed by a sealing piece and a roller. 25. The device according to any one of claims 1 to 24, wherein the outer edges of the slits are formed by elastic claws. 26) Device according to any one of claims 1 to 25, characterized in that the ζ position is pivotably supported. 27. Device according to any one of claims 1 to 26, characterized in that one of the walls delimiting the interior chamber is movable. 28. The apparatus according to any one of claims 1 to 27, wherein the application width is limited by a moving plate. 29. Device according to claim 1, characterized in that the magnetizable strip is designed as a pneumatically compressed clamping device for fixing the pawl. 30. 30. The device according to claim 1, wherein the roller is arranged in a slit in the application area. 31. The device according to any one of claims 1 to 30, wherein the edge of the slit is formed by two rollers as a sealing member and a pressing member.