JP2016073952A - Die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die capable of manufacturing a shim easily, and thinning its thickness.SOLUTION: Concerning a die 10 for coating a web W to be conveyed with a coating slip, the die 10 comprises a first body 12, a second body 14, a liquid reservoir 18 formed on the second body 14, and a shim 16 sandwiched between the first body 12 and the second body 14, and the shim 16 is a film made of a synthetic resin.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a die for a coating apparatus for coating a web with a coating liquid.

  Conventionally, when a coating liquid is applied to a long web, the web is conveyed at a constant speed and coating is performed using a die. The die is formed of a first main body, a second main body, and a shim, and a liquid reservoir is provided therein. The coating liquid is supplied to a liquid reservoir by a pump, and the coating liquid is discharged from the liquid reservoir using a slit-like discharge port, and continuous coating or intermittent coating is performed on one side of the web.

JP 2001-179156 A JP 2011-240249 A

  In the above die, the shim sandwiched between the first upper body and the second body is made of metal. Therefore, in order to change the coating width, it is necessary to recreate a metal shim, which is troublesome, and since it is a metal shim, there is a problem in that there is a limit to thinning the shim.

  In view of the above problems, an object of the present invention is to provide a die capable of easily manufacturing a shim and reducing its thickness.

  The present invention relates to a die for applying a coating liquid by discharging a coating liquid onto a transported web, the first body, the second body, a flat first fixed surface formed on the first body, and the first body. A flat second fixing surface formed on the two main bodies, a liquid reservoir portion provided on the second fixing surface of the second main body to which the coating liquid is supplied, and the first fixing of the first main body. Between the first fixing surface of the first main body and the second fixing surface of the second main body, and formed by the shim. The discharge passage of the coating liquid, and a slit-shaped discharge outlet of the coating liquid provided at the tip of the discharge passage, and the shim is formed of a synthetic resin film. It is a die.

  According to the present invention, since the shim sandwiched between the first main body and the second main body is a synthetic resin sheet, it can be easily manufactured and its thickness can be reduced.

It is a disassembled perspective view of the die | dye of embodiment. It is a bottom view of the upper body. It is a top view of the state which piled up shim on the lower main part. It is a longitudinal cross-sectional view of the die | dye in the state which has extracted air. It is a longitudinal cross-sectional view of the die | dye in the state of coating. It is explanatory drawing of a coating apparatus. It is explanatory drawing of the coating apparatus of the example of a change.

  Hereinafter, the coating apparatus 1 using the die | dye 10 in one Embodiment of this invention is demonstrated based on FIGS.

(1) Structure of coating apparatus 1 The structure of the coating apparatus 1 is demonstrated based on FIG. 5, FIG. In the coating apparatus 1, the die 10 of the present embodiment is arranged in the lateral direction (horizontal direction). In the vicinity of the front end portion of the die 10, a long web W such as a film, a metal foil, a metal net, a fabric, and paper is conveyed from the bottom to the top by the guide roll 2 and the guide roll 3 in the vertical direction at a constant conveyance speed. The coating liquid is applied to one side of the web W by the die 10. The coating liquid is stored in the tank 4 and is supplied from the supply pipe 6 to the die 10 by the pump 5. Further, as will be described later, the coating liquid mixed with air discharged from the air vent hole 28 of the die 10 is circulated to the tank 4 through the discharge pipe 30.

  In addition, the coating of the coating liquid by the coating apparatus 1 is not only continuous coating but also intermittent coating that alternately forms coating sections and non-coating sections on the web W as shown in Patent Document 1. You may go.

(2) Structure of Die 10 The structure of the die 10 will be described with reference to FIGS. The die 10 is an approximately rectangular parallelepiped made of metal and is disposed horizontally, and its longitudinal direction is disposed in parallel with the width direction of the web W. The front portion of the die 10 facing the web W has a triangular shape with a tapered longitudinal section, and a slit-like discharge port 22 is provided in the front end portion in the width direction. As shown in FIG. The coating liquid is discharged in the width direction of W. As shown in FIG. 1, the die 10 includes an upper main body 12 that is a first main body, a lower main body 14 that is a second main body, and a shim 16 that is sandwiched between the upper main body 12 and the lower main body 14. It is fixed by.

  The upper rear surface of the metal upper body 12 is a horizontal surface, and the upper front surface is an inclined surface that is inclined downward as it goes forward from the upper rear surface. The lower surface, which is the first fixing surface of the upper body 12, is formed as a flat surface. Air vent holes 28, 28 penetrate vertically in both sides of the upper body 12. A plurality of screw holes 36 for screwing to the lower main body 14 are opened at the edge of the lower surface of the upper main body 12.

  The lower rear surface of the metal lower body 14 is a horizontal surface, and the lower front surface is an inclined surface that is inclined upward as it goes forward from the lower rear surface. The upper surface, which is the second fixing surface of the lower main body 14, is formed as a flat surface, and the liquid reservoir 18 is formed in the width direction on this upper surface. The planar shape of the liquid reservoir 18 is rectangular as shown in FIG. A coating liquid supply port 24 is provided at the center of the bottom surface in the width direction of the liquid reservoir 18. The supply port 24 is connected to a supply passage 26 penetrating from the lower surface of the lower main body 14. A plurality of screw holes 38 are opened at the edge of the liquid reservoir 18 of the lower main body 14. These screw holes 38 are opened at positions corresponding to the upper main body 12. A supply pipe 6 for supplying the coating liquid from the pump 5 is connected to the supply passage 26 of the lower main body 14. A discharge pipe 30 is connected to each of the air vent holes 28, and a valve 32 is provided in the middle of each of the discharge pipes 30, and a distal end portion of each discharge pipe 30 is disposed in the tank 4.

  The shim 16 is U-shaped, and as shown in FIGS. 1 and 3, side pieces 161 and 161 arranged on both sides of the lower main body 14 and connecting pieces connecting the rear portions of these side pieces 161 and 161. 162. The side piece 161 has a rectangular shape, and a rectangular slack preventing opening 164 is opened at the center thereof. In addition, the shape of the slack preventing opening 164 is formed in accordance with the planar shape of the liquid reservoir 18. An air vent opening 165 is opened at a position corresponding to the air vent hole 28, and an edge is formed continuously with the slack preventing opening 164. A screw opening 166 has a rectangular opening in the connecting piece 162 and the pair of left and right side pieces 161 and 161. These screw openings 166 open corresponding to the positions of the screw holes 36 of the upper main body 12 and the screw holes 38 of the lower main body 14, and are formed larger than the screw holes 36 and 38. The dimension in the width direction of the notch 163 formed between the pair of left and right side pieces 161 and 161 is the coating width L. The shim 16 is a film made of a synthetic resin, such as a film made of polyethylene terephthalate, and has a thickness of 10 to 500 μm, preferably 250 μm or less. Note that the thickness of the shim 16 is the height of the discharge port 22. The shim 16 made of a synthetic resin film is transparent.

  When assembling the die 10, the shim 16 is placed on the upper surface which is the second fixing surface of the lower main body 14. When placing, the edge of the liquid reservoir 18 and the edge of the notch 163 of the shim 16 are placed in alignment. Since the shim 16 is transparent, the edge of the liquid reservoir 18 can be seen through the shim 16, and the shim 16 can be placed in correspondence with the position of the liquid reservoir 18 accurately.

  Next, the upper body 12 is placed on the upper surface of the lower body 14 on which the shim 16 is placed, and is fixed by a plurality of screws. At this time, since the lower surface of the upper main body 12 and the upper surface of the lower main body other than the liquid reservoir 18 are flat surfaces, the shim 16 made of a synthetic resin film can be sandwiched and fixed. When this fixing is performed, a discharge passage 20 is formed between the upper main body 12 and the lower main body 14 by the notch portion 163 between the pair of left and right side pieces 161 and 161, and the discharge port 22 having a coating width L is formed. It is formed.

(3) Manufacturing Method of Shim 16 A case where the shim 16 is manufactured will be described.

  First, a film wound in a roll shape is drawn out for a predetermined length, and the drawn rectangular film is cut to manufacture a shim 16 in which the side pieces 161 and 161 and the connecting piece 162 are integrated.

  Next, a slack prevention opening 164, an air vent opening 165, and a screw opening 166 are formed in the shim 16.

  As shown in FIG. 4, the shim 16 is brought into close contact with the lower surface of the upper main body 12, but when the anti-slack opening 164 is not open, the side piece 161 of the shim 16 made of a film is attached to the upper main body 12. There is a case in which the air is slackened between the lower surface and the air enters the slack portion and the air remains in a bag shape. In particular, when a roll-shaped winding wrinkle is attached to the film, it is easy to sag and air easily enters.

  However, in the shim 16 of this embodiment, since the slack prevention opening 164 is opened in the side piece 161, air escapes from this portion and the side piece 161 does not become slack.

(4) Air venting method and coating method of die 10 Next, the air venting method and coating method of the die 10 will be described in order.

  First, as shown in FIG. 4, the operator closes the discharge port 22 by covering the slit-shaped discharge port 22 spreading in the width direction with a cover 34. The cover 34 is, for example, a silicon adhesive tape, which is attached to the discharge port 22 and closed in an airtight state.

  Second, the worker opens the pair of left and right valves 32, 32.

  Third, the operator drives the pump 5 to supply the coating liquid in the tank 4 to the die 10 at a constant pressure. The coating liquid supplied from the pump 5 enters the liquid reservoir 16 from the supply port 24 through the supply pipe 6. This infiltrated coating liquid enters the supply pipe 6 and the liquid reservoir 18. When the applied coating liquid fills the liquid reservoir 18, the pushed air (bubbles) is discharged from the pair of left and right air vent holes 28, 28 and flows to the tank 4 through the discharge pipe 30. At this time, since the slack prevention opening 164 is opened in the shim 16, there is no air layer due to the shim 16 slackening between the shim 16 and the lower surface of the lower main body 14, and air (bubble ) Can be discharged.

  Fourth, the operator observes the coating liquid discharged from the discharge pipe 30 to the tank 4. The discharge is initially only air, but gradually the coating liquid is mixed, and then only the coating liquid is discharged. At this time, the operator determines that the air has been completely removed from the die 10. Then, the pair of left and right valves 32, 32 are closed and the pump 5 is temporarily stopped.

  Fifth, the operator removes the cover 25 that closes the discharge port 22.

  Sixth, as shown in FIG. 6, the operator conveys the web W in the vertical direction from the bottom to the top by the guide rolls 2 and 3.

  Seventh, as shown in FIG. 5, the operator drives the pump 5 again and applies the coating liquid to the web W with a predetermined width and a predetermined thickness from the discharge port 22 of the die 10. In this case, the coating width L is determined by the width of the discharge port 22, that is, the width L of the cutout portion 163 of the shim 16, and the coating thickness per unit time supplied by the pump 5 (for example, 1 Determined by the supply amount of coating liquid per minute.

(5) Effect In the die 10 of the present embodiment, when the air inside the die 10 is extracted from the pair of left and right air vent holes 28 before coating, the shim 16 is provided with a slack preventing opening 164. Therefore, no air is accumulated between the lower surface of the upper main body 12 and the shim 16, and air can be completely removed. In other words, the presence of the slack preventing opening 164 does not cause the film-like shim 16 to slack, and air can be discharged from the slack preventing opening 164 even when the film is slackened. Moreover, since the slack preventing opening 164 and the air vent opening 165 are continuously provided, the air can be vented more reliably.

  Further, since the lower surface of the upper body 12 and the upper surface of the lower body other than the liquid reservoir 18 are flat surfaces, they can be fixed with a shim 16 made of a synthetic resin film interposed therebetween.

  Further, since the shim 16 is transparent, the position of the liquid reservoir 18 and the like can be seen through the shim 16, and the shim 16 can be disposed in correspondence with the position of the liquid reservoir 18 accurately.

  Further, since the shim 16 is made of a synthetic resin film, the film 16 is simply cut and can be easily manufactured, and the coating width L can be easily changed. Further, the sizes and positions of the slack prevention opening 164, the air vent opening 165, and the screw opening 166 can be easily changed. Furthermore, since the shim 16 is a synthetic resin film, the thickness can be reduced.

  Moreover, since the shape of the slack preventing opening 164 is the same as the planar shape of the liquid reservoir 18, it is possible to prevent air from entering and to easily attach the shim 16 to the upper surface of the lower main body 14.

  Further, since the air vent opening 165 is formed larger than the air vent hole 28 and the screw opening 166 is also formed larger than the screw holes 36 and 38, the air is released from the air vent hole 28 even if the position of the shim 16 is slightly shifted. It can be discharged reliably and can also be screwed.

Example of change

  In the said embodiment, although it formed with the polyethylene terephthalate as the shim 16 of a synthetic resin film, you may form with synthetic resins other than this.

  In the above embodiment, the supply port 24 is provided at the center of the bottom surface of the lower main body 14. Instead, the supply port 24 is provided at the center of the rear surface of the lower main body 14, and the coating liquid is supplied from the rear surface of the liquid reservoir 18. Also good.

  In the above embodiment, the first main body is the upper main body 12, the second main body is the lower main body 14, and the die 10 is arranged in the lateral direction. Instead, the die 10 is arranged so that the discharge port 22 faces downward. 10 may be arranged in the vertical direction. In this case, the first main body is arranged on the front side or the rear side with respect to the conveying direction of the web W, and the second main body is arranged on the rear side or the front side.

  In the above embodiment, the slack prevention opening 164 provided in the shim 16 is formed in a rectangular shape, but may be formed in a circular shape, an elliptical shape, or the like instead.

  Moreover, in the said embodiment, although the air vent opening part 165 and the slack prevention opening part 164 were provided continuously in the shim 16, you may provide independently.

  In the coating apparatus 1 of the above embodiment, the web W is transported in the vertical direction at a constant transport speed by the guide roll 2 and the guide roll 3 from the bottom to the top. Instead, as shown in FIG. Alternatively, the web W may be conveyed by the backup roll 7, and the coating liquid may be applied to one side of the web W by the die 10 at the position of the backup roll 7.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Coating apparatus, 10 ... Die, 12 ... Upper main body (1st main body), 14 ... Lower main body (2nd main body), 16 ... Shim, 18 ... Liquid reservoir , 20 ... discharge passage, 22 ... discharge port, 28 ... air vent hole, 161 ... side piece, 162 ... connecting piece, 163 ... notch, 164 ... slack Prevention opening, 165 ... Air vent opening, 166 ... Screw opening

Claims (10)

In the die that applies the coating liquid by discharging it to the web being transported,
A first body;
A second body;
A flat first fixing surface formed on the first body;
A flat second fixing surface formed on the second body;
A liquid reservoir provided on the second fixed surface of the second main body and supplied with the coating liquid;
A shim sandwiched between the first fixed surface of the first body and the second fixed surface of the second body;
A discharge passage for the coating liquid formed by the shim between the first fixed surface of the first body and the second fixed surface of the second body;
A slit-shaped discharge port of the coating liquid provided at the tip of the discharge passage;
Have
The shim is formed from a synthetic resin film,
Die. The shim includes a pair of left and right side pieces disposed on both left and right sides of the liquid reservoir, and a connecting piece disposed on an edge of the liquid reservoir to connect the pair of left and right side pieces. ,
The die according to claim 1. A slack prevention opening is provided in each of the pair of left and right side pieces of the shim.
The die according to claim 2. The shape of the loosening prevention opening corresponds to the planar shape of the liquid reservoir,
The die according to claim 3. Air vent holes are provided on both sides of the first body of the die,
The die according to claim 4. An air vent opening corresponding to the air vent hole is formed in the pair of left and right side pieces of the shim.
The die according to claim 5. The air vent opening of the side piece is provided continuously with the slack preventing opening,
The die according to claim 6. The shim is a film made of polyethylene terephthalate.
The die according to claim 1. The web is conveyed in the longitudinal direction;
The die is arranged in a lateral direction so that the first main body is on the upper side and the second main body is on the lower side,
The die according to claim 1. The web is conveyed horizontally in the front-rear direction,
The die is arranged in the vertical direction so that the first main body is on the front side or the rear side, and the second main body is on the rear side or the front side.
The die according to claim 1.

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