JP6984484B2 - Coating device, device for discharging liquid - Google Patents

Description

The present invention relates to a coating device and a device for discharging a liquid.

Some devices such as printing devices that discharge liquids include a coating device that uses a member to be printed as a member to be coated and applies a coating liquid such as a treatment liquid.

For example, the treatment liquid is pumped up and supported (held) on the surface by a pumping roller in which a part of the treatment liquid is immersed in the treatment liquid of the treatment liquid storage tank, and the pumping roller is rotated to convey the treatment liquid to the surface of the pumping roller. The retained treatment liquid is transferred to a film thickness control roller that controls the film thickness adhering to the coating roller, and the treatment liquid held by the film thickness control roller is transferred to the coating roller, and the coating roller and the counter roller are used. There is known a method in which a recording medium is conveyed between the recording media and the treatment liquid held on the surface of the coating roller is applied to the recording medium (Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-183336

However, as disclosed in Patent Document 1, in a configuration in which a pumping roller, a membrane control roller (also referred to as a drawing roller), and a coating roller are sequentially arranged in series, the apparatus increases as the number of roller stages increases. There is a problem of increasing the size in one direction.

The present invention has been made in view of the above problems, and an object of the present invention is to reduce the size of the apparatus.

In order to solve the above problems, the coating apparatus according to claim 1 of the present invention is used.
A coating device that applies a coating liquid to a member to be coated.
A supply pan for accommodating the coating liquid and
A first rotating member that supplies the coating liquid from the supply pan to the coating position of the member to be coated, and
A plurality of second rotating members for thinning the coating liquid on the peripheral surface of the first rotating member are provided.
The plurality of second rotating members are held by the pressure bracket and pressed against the peripheral surface of the first rotating member, and are arranged between the supply pan and the coating position in the rotation direction of the first rotating member. The configuration is as follows.

According to the present invention, the size of the device can be reduced.

It is a side side explanatory view of the coating apparatus which concerns on 1st Embodiment of this invention. It is a side side explanatory view of the coating apparatus which concerns on 2nd Embodiment of this invention. It is explanatory drawing of the printing apparatus as the apparatus which ejects a liquid which concerns on 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. First, the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a side explanatory view of the coating apparatus according to the same embodiment.

The coating device 100 is a processing liquid coating device that applies the processing liquid 101 as the coating liquid to the sheet material 110 as the member to be printed, which is the member to be printed to which the liquid is applied by the liquid ejection means.

Examples of the treatment liquid include a modifier that modifies the surface of the sheet material 110 by applying it to the surface of the sheet material 110. Specifically, by applying the sheet material 110 evenly in advance, the moisture of the ink quickly permeates the sheet material 110, the color component is thickened, and the drying is accelerated, so that the ink bleeds (feather). Examples include a fixing agent (setting agent) that prevents ringing, bleeding, etc.) and strike-through, and makes it possible to increase productivity (number of image outputs per unit time).

The treatment liquid is composed of, for example, celluloses that promote the penetration of water with respect to a surfactant (either an anion type, a cationic type, a nonionic type, or a mixture of two or more kinds thereof). A solution containing (hydroxypropyl cellulose or the like) and a base such as talc fine powder can be used. Further, it can also contain fine particles.

The coating device 100 includes a supply pan (treatment liquid storage tank) 102 containing the treatment liquid 101, a coating roller 103, a first drawing roller 104, a second drawing roller 105, a pressure bracket 106, and a pressure roller. It is equipped with 107.

The coating roller 103 is a roller member which is the first rotating member in the present embodiment, and is a member for applying the treatment liquid 101 to the sheet material 110. A part of the coating roller 103 is immersed in the processing liquid 101 of the supply pan 102 and rotates in the direction of the arrow to pump up the treatment liquid 101 and support it on the peripheral surface.

The first drawing roller 104 and the second drawing roller 105 are a plurality of second rotating members in the present embodiment, and the treatment liquid 101 on the peripheral surface of the coating roller 103 is treated and thinned. In the present embodiment, the first drawing roller 104 and the second drawing roller 105 have the same diameter and are arranged concentrically with respect to the center of the coating roller 103, but the first drawing roller 104 and the second drawing roller 104 and the second drawing roller. The rollers 105 may have different diameters.

Here, the first drawing roller 104 and the second drawing roller 105 are held by the pressure bracket 106 and are arranged along the peripheral surface of the coating roller 103. The pressure bracket 106 is urged in the direction of an arrow toward the peripheral surface of the coating roller 103, and the first drawing roller 104 and the second drawing roller 105 are pressed against the peripheral surface of the coating roller 103.

The pressurizing roller 107 is a pressurizing member in the present embodiment, and is urged in the direction of an arrow toward the peripheral surface of the coating roller 103 and pressed with a constant pressing force. For example, when the sheet material 110 is a continuous body such as roll paper, it can be pressed against the peripheral surface of the coating roller 103 by the tension of the continuous body, so that the pressure roller 107 may not be provided. ..

In the coating device 100, the treatment liquid 101 is pumped up from the supply pan 102 by the rotation of the coating roller 103, and is supported on the peripheral surface of the coating roller 103 in a liquid film state.

Then, the nip portion between the coating roller 103 and the first drawing roller 104 and the nip portion between the coating roller 103 and the second drawing roller 105 are uniformly stretched to form a thin film.

After that, the treatment liquid 101 thinned on the coating roller 103 is applied to the sheet material 110 at the nip portion of the coating roller 103 and the pressure roller 107.

As described above, since the first drawing roller 104 and the second drawing roller 105 as the plurality of second rotating members are arranged along the peripheral surface of the coating roller 103, the device is provided when a plurality of second rotating members are provided. Can be miniaturized.

Next, the second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a side explanatory view of the coating apparatus according to the same embodiment.

In the present embodiment, the first transport belt 123 is hung between the roller 121 as a rotating body and the first roller 122 arranged on the downstream side in the transport direction. Further, the second transport belt 127 is arranged between the pressure roller 107 and the second roller 125 arranged on the downstream side in the transport direction.

Here, the first transport belt 123 is a belt member which is the first rotating member in the present embodiment, and is immersed in the processing liquid 101 of the supply pan 102 at a portion hung around the peripheral surface of the roller 121. The treatment liquid 101 is pumped up and supported on the peripheral surface of the first transport belt 123 by the rotation of the roller 121.

Then, the first throttle roller 104 and the second throttle roller, which are a plurality of second rotating members, are opposed to the peripheral surface of the roller 121 around which the first conveyor belt 123 is hung, and along the peripheral surface of the first conveyor belt 123. 105 is arranged.

In the coating device 100, the processing liquid 101 is pumped up from the supply pan 102 by the circumferential movement of the first transport belt 123, and is supported on the peripheral surface of the first transport belt 101 in a liquid film state.

Then, the nip portion between the portion hung on the roller 121 of the first transport belt 123 and the first throttle roller 104, and the second throttle roller 105 of the portion hung around the roller 121 of the first conveyor belt 123. At the nip part of, each is uniformly stretched and thinned.

After that, the treatment liquid 101 thinned on the first transfer belt 123 is applied to the sheet material 110 at the nip portion between the first transfer belt 123 and the portion hung on the pressure roller 107 of the second transfer belt 127. Will be done.

In this way, since the first drawing roller 104 and the second drawing roller 105 as the plurality of second rotating members are arranged along the peripheral surface of the first conveying belt 123, the case where a plurality of second rotating members are provided. The device can be miniaturized.

Next, the third embodiment of the present invention will be described with reference to FIG. FIG. 3 is an explanatory diagram of a printing device as a device for discharging a liquid according to the same embodiment.

The printing device 1 includes a carry-in means 11 for carrying in a sheet material 110 such as continuous paper, a pretreatment means 12 including a coating device 100 according to the present invention for applying a pretreatment liquid to one surface of the sheet material 110, and a front. A printing means 13 for printing on one surface of the sheet material 110 coated with the treatment liquid and a discharging means 14 for winding up the sheet material 110 are provided.

In the printing apparatus 1, the sheet material 110 is unwound from the main winding roll body 110A of the carrying-in means 11, the pretreatment liquid is applied by the pretreatment means 12, and the liquid is applied to one surface of the sheet material 110 by the printing means 13. It is given and an image is formed. After that, the sheet material 110 is taken up by the take-up roll 110B of the discharging means 14.

Here, the printing means 13 is arranged with the liquid discharging means 21a, 21b, 21c, 21d along the conveying direction (arrow direction) of the sheet material 110. The required liquid is discharged from these liquid discharging means 21a to 21d to form an image on the sheet material 110 to be conveyed.

Each of the liquid discharging means 21a, 21b, 21c, and 21d discharges, for example, black K, cyan C, magenta M, and yellow Y liquids to the conveyed sheet material 110, respectively. The types and numbers of colors are not limited to this.

In each of the above embodiments, the example is described in which the member to be coated is a cut sheet material or a continuous sheet material, but the present invention is not limited to this. For example, continuous paper, roll paper, a continuum such as a web, a cut sheet material, wallpaper, a sheet for an electronic circuit board such as a prepreg, and the like may be used.

In addition to recording images such as characters and figures with a liquid such as ink, an image having no meaning such as a pattern is given to the member to be coated with a liquid such as ink for the purpose of decoration and decoration. You can do it.

In the present application, the liquid to be applied is not particularly limited, but is preferably one having a viscosity of 30 mPa · s or less at room temperature, under normal pressure, or by heating or cooling. More specifically, solvents such as water and organic solvents, colorants such as dyes and pigments, polymerizable compounds, resins, functionalizing materials such as surfactants, biocompatible materials such as DNA, amino acids and proteins, and calcium. , Solvents, suspensions, emulsions, etc. containing edible materials such as natural pigments, such as inks for inkjets, surface treatment liquids, components of electronic and light emitting elements, and formation of electronic circuit resist patterns. It can be used in applications such as liquids and material liquids for three-dimensional modeling.

When a liquid discharge head is used as a liquid applying means, a piezoelectric actuator (laminated piezoelectric element and thin film type piezoelectric element), a thermal actuator using an electric heat conversion element such as a heat generating resistor, and vibration are used as an energy generation source for discharging the liquid. Those using an electrostatic actuator consisting of a plate and a counter electrode are included.

Note that printing in the present application has the same meaning as image formation, recording, printing, printing, and the like.

1 Printing device (device that discharges liquid)
11 Carry-in means 12 Pretreatment means 13 Printing means 14 Discharge means 100 Coating device 101 Processing liquid 102 Supply pan 103 Coating roller (first rotating member)
104 1st throttle roller (2nd rotating member)
105 2nd throttle roller (2nd rotating member)
107 Pressurizing roller (pressurizing member)
123 1st transport belt (1st rotating member)

Claims (7)

A coating device that applies a coating liquid to a member to be coated.
A supply pan for accommodating the coating liquid and
A first rotating member that supplies the coating liquid from the supply pan to the coating position of the member to be coated, and
A plurality of second rotating members for thinning the coating liquid on the peripheral surface of the first rotating member are provided.
The plurality of second rotating members are held by the pressure bracket and pressed against the peripheral surface of the first rotating member, and are arranged between the supply pan and the coating position in the rotation direction of the first rotating member. A coating device characterized by being made. The coating device according to claim 1, wherein the first rotating member applies the coating liquid to the member to be coated. The coating device according to claim 1, wherein the first rotating member supplies the coating liquid to a member that applies the coating liquid to the member to be coated. Coating apparatus according to claim 3, characterized in that it comprises a pressing member for pressing the object to be coated member relative to said member for applying the coating liquid. The coating device according to any one of claims 1 to 4, wherein the first rotating member is a roller member. The first rotating member is a belt member that is hung around a rotating body.
The coating device according to claim 1 or 2 , wherein the plurality of second rotating members are arranged at positions facing the rotating body. A liquid discharge means that discharges liquid to the member to be coated,
A device for discharging a liquid , which comprises the coating device according to any one of claims 1 to 6.

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