JPH052769U - Jet type coater head coating width adjusting device - Google Patents

Abstract

(57) [Summary] [Structure] A slit-shaped liquid passage 8 from the buffer chamber 7 following the paint chamber 3a of the fountain 3 to the nozzle outlet 4.
A plate-shaped side deckle 20 that closes the liquid passage 8 is fitted in the left and right sides of the nozzle so as to be movable back and forth in the left-right direction, and a front end edge 21 of the side deckle 20 is perpendicular to the longitudinal direction of the nozzle outlet 4, Has a length reaching close to,
Jet coater head coating width adjusting device. [Effect] The opening width of the fountain nozzle outlet can be adjusted freely, the both ends of the paint sprayed from the nozzle outlet become sharp, uniform coating can be performed over the entire width of the web, and the excess paint after coating is scraped off. The blade has a long life, there is no dripping of paint on the edge of the backup roll, and it is possible to prevent the edge of the web from becoming dirty. Since it is structurally extremely simple, it is easy to manufacture and assemble it to the coater head.
It can be applied to existing coater heads without major modification.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention regulates the left and right end positions of nozzles in a jet type coater head that sprays paint onto a web running through a backup roll from a slit-shaped nozzle exit along the web width direction. Device for adjusting coating width.

[0002]

[Prior Art]

 In general, this type of coater head is provided with a coating chamber called a fountain below a backup roll 2 around which a running web 1 is wound, as shown in FIG. Further, the coating material is sprayed in a curtain shape from a slit-shaped nozzle outlet 4 along the width direction of the web to apply the coating material to the web. 5 is a blade for setting the coating amount, and 6a is a guide plate for guiding the excess paint scraped off by the blade 5 to the tank 6. Therefore, in recent years, the entire width of the nozzle outlet 4 is provided above the paint chamber 3a in the fountain 3 as shown in FIG. 3 so that the paint is uniformly and stably blown out over the entire width of the nozzle outlet 4. A buffer chamber 7 having a small length is provided to flatten the pressure distribution in the nozzle width direction, and a slit-shaped long liquid passage 8 is provided between the buffer chamber 7 and the nozzle outlet 4 to spray the paint. The structure is designed to give directionality.

By the way, when the coating width is changed when the webs 1 having different widths are to be coated, it is naturally necessary to adjust the lateral width of the nozzle outlet 4 according to the coating width. Conventionally, a coating width adjusting device as shown in FIG. 6 has been adopted. That is, FIG. 6 shows one end side of the fountain 3, in which the fixed deckle 10 made of a hard synthetic resin plate fitted and arranged at a position closer to the upper part in the liquid passage 8 is fixed to the inner surface side of the upper side plate 9a, A bearing cylinder 11 is fixed to a bracket 11a extending from the outer surface of the side plate 9a, and a horizontal rectangular shape is attached to a mounting plate 12a fixed to the outer end of a cylinder shaft 12 movably held only in the bearing cylinder 11. A movable deckle 13 made of a hard synthetic resin plate is attached such that its lower edge is in sliding contact with the upper edge of the fixed deckle 10 to close the nozzle outlet 4, and a screw shaft 14 screwed into the cylinder shaft 12 is attached to its outer end. By rotating the handle 14a fixed to the, the moving deck 13 is moved in the left-right direction. The fixed deckle 10 and the movable deckle 13 are provided on the left and right sides of the fountain 3, and the position of the movable deckle 13 regulates the left and right end positions of the nozzle outlet 4 to adjust the coating width. Reference numeral 15 is a paint introduction pipe connected to the paint chamber 3a.

[0004]

[Problems to be solved by the device]

 However, in the coating width adjusting device having the above-mentioned conventional structure, the flow of the paint from the paint chamber 3a to the nozzle outlet 4 via the buffer chamber 7 is affected by the fixed deck 10 and the moving deck 13 which are projected into the liquid passages at the left and right ends. When the receiving, especially the front edge 13a of the moving deck 13 is located in front of the front edge 10a of the fixed deck 10, that is, inside the fountain 3, as shown in FIG. As shown by the arrow, it becomes an inward diagonal direction at both left and right ends, and because it interferes with the vertically sprayed paint in the vicinity of it and disturbs it, the two ends of the paint are not sharpened and the left and right sides of the web 1 are not sharpened. The amount of coating on the side edges is reduced, and the paint splash generated by the above-mentioned interference comes off the side edge of the web 1 and the end surface of the backup roll 2. Tended to be directly attached. . Therefore, the coating amount in the width direction of the web becomes non-uniform, and the blade 5 slides on the left and right side edges of the web 1 which are less wetted. There was a problem that the paint directly attached to the surface accumulates and drips, which causes stains on the ears of the web.

In view of the above situation, an object of the present invention is to provide a coating width adjusting device for a jet type coater head with a very simple structure so that the spray direction of the paint from the fountain nozzle outlet is vertical even at the left and right ends. The discharge end becomes sharp and the discharge width can be easily adjusted to the width of the web, which makes the coating amount uniform over the entire width of the web and shortens the service life due to uneven wear of the ears of the blade. Another object of the present invention is to provide a material capable of avoiding the above problems and preventing the edge of the backup roll from dripping the coating material and preventing the web from becoming dirty.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a coating width adjusting device according to the present invention has a slit-shaped nozzle extending along a web width direction of a fountain disposed below a backup roll on a web running through a backup roll. In a jet-type coater head that sprays paint from an outlet to apply, a plate that closes the liquid passage on each of the left and right sides of the slit-shaped liquid passage from the buffer chamber that follows the paint chamber of the fountain to the nozzle outlet. -Shaped side deckle is inserted so as to be able to move back and forth in the left-right direction, and the front end edge of the side deckle has a length perpendicular to the longitudinal direction of the nozzle outlet and reaching from the nozzle outlet to the vicinity of the impact chamber. It adopts the configuration.

[0007]

[Action]

 Since the front edge of the side deckle is perpendicular to the longitudinal direction of the nozzle outlet and has a length reaching from the nozzle outlet to the vicinity of the buffer chamber, the side deck goes from the buffer chamber to the nozzle outlet on both left and right ends. It does not obstruct the flow direction of the paint, but rather guides the flow perpendicular to the longitudinal direction of the nozzle outlet. Therefore, regardless of the advancing / retreating position of the side deckle, the spray direction of the paint from the fountain nozzle outlet is vertical even at the left and right ends and is not disturbed. Therefore, the coating amount becomes uniform over the entire width of the web, and the blade has a long life without uneven wear of the ears due to sliding contact with both side edges of the web, which is less wet. In addition, the paint does not drip at the end of the backup roll.

The side deckle can be made of various materials, but in terms of strength against the discharge pressure of the paint, abrasion resistance, and processing accuracy for surely closing the nozzle outlet, a copper plate or the like is used. A metal plate is preferred.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. Since the basic structure of the jet coater head is as described above with reference to FIG. 1, its explanation is omitted here.

As shown in FIGS. 2 and 3, the fountain 3 is a laterally long coating chamber having a coating chamber 3a extending substantially over its entire length, and is continuous in the longitudinal direction with its sharp upper end in side view. A slit-shaped nozzle outlet 4 is provided, and paint inlet pipes 15 communicating with the paint chamber 3a are connected to the lower portions on both left and right ends, and the outside of the upper portion is different from the conventional ones described above. Similarly, the bearing sleeve 11 is attached via the bracket 11a.

The paint chamber 3a has a semicircular lower half portion and a triangular cross-sectional upper portion between the lower block 16a and the pair of intermediate blocks 16b and 16c fitted on the lower block 16a. It is configured. A buffer chamber 7 is formed between the intermediate blocks 16b and 16c and is located above the coating chamber 3a and comprises a small space continuous in the longitudinal direction of the fountain. The buffer chamber 7 extends over the entire length of the coating chamber 3a. It communicates with the top of 3a. Further, on the intermediate blocks 16b and 16c, there are provided a pair of upper blocks 16d and 16e, and a pair of substantially flat plate-shaped passage constituting plates 17 and 18 located between them and opposing each other. A slit-shaped liquid passage 8 having a slit-shaped nozzle outlet 4 at its upper end and a buffer chamber 7 at its lower end is formed by the opposing gaps 17 and 18.

The lower block 16a and the intermediate blocks 16b and 16c, the intermediate block 16b and the upper block 16d, the intermediate block 16c and the upper block 16e, the upper block 16d and the passage forming plate 17, and the upper block 16e and the passage forming plate. 18 are connected and integrated by connecting bolts (not shown). The front and back sides of the fountain 3 are covered with cover plates 19a and 19b, respectively, whose upper edges reach the upper ends of the passage forming plates 17 and 18, respectively.

As shown in FIG. 4, in the bearing cylinder 11, as in the conventional case shown in FIG. 6, the cylinder shaft 12 has a shaft formed through the engagement of the key groove 12b on the outer surface and the key 11b on the bearing cylinder 11 side. A side deckle 20 made of copper plate extends rearward from the upper portion of the vertically rectangular main body portion 20a of the mounting plate 12a fixed to the outer end of the mounting plate 12a, which is movably held only in the direction. Is fixed to the rear end of the horizontal guide portion 20b via a mounting bracket 12c. In this side deckle 20, the main body 20a is inserted into the liquid passage 8 with the upper part thereof protruding from the nozzle outlet 4, and the lower edge of the horizontal guide part 20b is lower than the nozzle outlet 4 of the upper end plate 9a. The screw shaft 14 is arranged so as to be slidably contacted with the upper end edge and is moved in the left-right direction by rotating the screw shaft 14 screwed into the cylinder shaft 12 by operating a handle 14a fixed to the outer end thereof. In FIG. 4, 16f is an end block of the fountain 3, 9b is a lower end plate fixed to the outside thereof, 7a is a buffer chamber inspection hole, 23a is a plug for closing the inspection hole 7a, and 23b is its It is an outer lid.

As shown also in FIG. 5, the side deckle 20 is set to have a thickness that closes the liquid passage 8 at the portion fitted into the liquid passage 8, and the body portion 20 a is arranged in the longitudinal direction of the nozzle outlet 4. It has a vertical front edge 21 and a lower edge 22 having a vertical length close to the buffer chamber 7. The side deckles 20 as described above are provided on both the left and right sides of the fountain 3, and the positions of the side deckles 20 regulate the left and right end positions of the nozzle outlet 4 to adjust the coating width. The upper end edge of the passage forming plate 18 on the rear side extends above the nozzle outlet 4 to form a splash shielding projection edge portion 18a, and the upper end edge of the side deckle 20 is almost the same as the projection edge portion 18a. It is set to have the same height. Further, the liquid passage 8 is set so that the interval becomes slightly narrower from the lower part toward the upper part, that is, toward the nozzle outlet 4, but the body portion 20a of the side deckle 20 has a thickness substantially the same as the interval of the nozzle outlet 4. There is.

In order to apply the coating with the fountain 3 having the above-described structure, the side deckles 20 on both sides are previously adjusted in position so that the front edge 21 of the side deckle 20 coincides with the side edge position of the web 1 wound around the backup roll 2. The widths of the left and right openings of the nozzle outlet 4 and the width of the web 1 are set to be the same. At the time of coating, the paint introduced into the fountain 3 from the paint introducing pipes 15 on both sides flows into the buffer chamber 7 from the paint chamber 3a, where the pressure distribution in the nozzle width direction is flattened. Then, it is continuously sprayed through the liquid passage 8 from the nozzle outlet 4 in a curtain shape over the entire opening width, and is continuously coated on the surface of the web 1 running through the backup roll 2.

At this time, since the front edge 21 of the side deckle 20 has a length that is perpendicular to the longitudinal direction of the nozzle outlet 4 and reaches the vicinity of the buffer chamber 7, the buffer chamber 7 extends from the nozzle outlet 4 to the nozzle outlet 4. As shown by the arrow in FIG. 4, the flow of the paint toward the vertical direction is perpendicular to the longitudinal direction of the nozzle outlet 4 on the left and right ends of the liquid passage 8 as in the middle portion. Therefore, regardless of the advancing / retreating position of the side deckle 20, the direction in which the paint is ejected from the nozzle outlet 4 is vertical at both the left and right ends and is not disturbed, the ejected end is sharp, and the coating amount on the web 1 is Uniform across the width. Therefore, the blade 5 (see Fig. 1), which scrapes off the excess paint in the next step, has a long life without uneven wear of the ears due to sliding contact with both side edges of the web, which is less wet, as in the conventional case. The paint does not drip at the end of the backup roll 2.

In the present invention, the detailed structure such as the side deckle operation mechanism and mounting structure, the fountain member structure, the shape of the paint chamber, and the like can be variously modified in addition to the examples.

[0018]

[Effect of the device]

 According to the coating width adjusting device of the jet type coater head according to the present invention, the opening width of the fountain nozzle outlet can be adjusted freely, and the paint spraying direction from the nozzle outlet can be adjusted at both left and right ends regardless of the opening width. Also becomes vertical and is not disturbed, the spray end of the coating becomes sharp, and the spray width can be easily adjusted to the width of the web, and the coating amount becomes uniform over the entire width of the web. It is possible to avoid shortening the service life due to uneven wear of the blade ears that scrape off the excess coating material, and prevent the paint from dripping at the ends of the back-up rolls and preventing the web from becoming dirty. In addition, since this coating width adjusting device is structurally extremely simple, it is easy to manufacture and assemble to a coater head, and it can be applied to existing coater heads without major modification. There is.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view schematically showing a jet coater head.

FIG. 2 is a front view of a fountain according to an embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

5 is a cross-sectional arrow view taken along the line CC of FIG.

FIG. 6 is a vertical sectional side view of a main part of a fountain showing a conventional coating width adjusting device.

[Explanation of symbols]

 1 web 2 backup roll 3 fountain 3a paint chamber 4 nozzle outlet 7 buffer chamber 8 liquid passage 20 side deckle 21 front edge 22 lower edge

Claims (1)

[Claims for utility model registration] [Claim 1] A coating material is sprayed onto a web running through a backup roll from a slit-shaped nozzle outlet along the web width direction of a fountain disposed below the backup roll. In the jet type coater head to be worked, a plate-shaped side deckle that closes the liquid passage is movable in the left and right directions respectively on the left and right sides of the slit-shaped liquid passage extending from the buffer chamber following the paint chamber of the fountain to the nozzle outlet. An apparatus for adjusting a coating width of a jet coater head, which is inserted and has a length in which a front end edge of the side deckle is perpendicular to a longitudinal direction of a nozzle outlet and reaches the vicinity of a buffer chamber from the nozzle outlet.