JP6412374B2 - Application nozzle assembly and shim plate - Google Patents

Description

  The present invention relates to a coating nozzle assembly and a shim plate.

  Conventionally, an application nozzle assembly for applying a liquid to an object to be coated is known. Patent Document 1 discloses a coating nozzle assembly (control coat nozzle) having a liquid slot for extruding liquid and air slots provided on both sides of the liquid slot. The liquid pushed out from the liquid slot collides with the air flow ejected from the air slot, becomes a fiber, and is applied onto the object to be coated. The liquid slot is divided into a plurality of compartments. By controlling the switching valve that supplies the liquid and the switching valve that supplies the air for each section, the application width of the liquid applied to the object can be adjusted.

  Patent Document 2 discloses an application nozzle assembly for applying a liquid to an object to be coated from a liquid slot formed by sandwiching a shim plate between a pair of die head halves. In order to prevent liquid leakage from the end of the die head half, an end plate is attached to the die head half so as to close the end of the manifold formed in the die head half. Thereby, a liquid can be apply | coated to a to-be-coated object with a uniform film thickness, preventing the liquid leak in a die head edge part.

Japanese Patent Laid-Open No. 7-204569 JP 2007-27579A

  When changing the application width of the liquid applied to the object to be coated, in the application nozzle assembly of Patent Document 1, it is necessary to provide a plurality of switching valves and control the plurality of switching valves. In the coating nozzle assembly of Patent Document 2, it is necessary to change the coating nozzle assembly itself in order to change the coating width.

  On the other hand, in the case of a control coat nozzle using a shim plate, it is conceivable to change the coating width by changing the width of the cut portion of the shim plate. However, if the width of the cutout portion of the shim plate is reduced in order to change the coating width, the liquid is liquid because the width of the liquid cavity provided in the liquid nozzle half is larger than the width of the cutout portion of the shim plate. There is a possibility of leaking out of the nozzle from the cavity through the liquid nozzle half and the shim plate. In order to prevent liquid leakage, it is necessary to change the width of the liquid cavity of the liquid nozzle half in accordance with the width of the cutout portion of the shim plate. For this reason, it is necessary to remake both the liquid nozzle half and the shim plate.

  Therefore, the present invention provides an application nozzle assembly and a shim plate that can change the application width while preventing liquid leakage.

In order to solve the above-described problems, the present invention has the following coating nozzle assembly.
That is, the application nozzle assembly that extrudes fluid material is
A first material nozzle block;
A second material nozzle block;
A shim plate disposed between the first material nozzle block and the second material nozzle block;
With
The first material nozzle block is provided with a cavity extending in the longitudinal direction of the application nozzle assembly,
The shim plate is provided along the cavity portion in a portion of the shim plate that is not provided with the cutout portion in the longitudinal direction, and a cutout portion that defines a material slot that communicates with the cavity portion and extrudes the fluid material. And a lateral groove communicating with the cut-out portion.
Moreover, it was set as the shim board integrated in said coating nozzle assembly.

  According to the present invention, the coating width can be changed while preventing liquid leakage.

Schematic which shows an application | coating system. The figure which shows an application | coating nozzle assembly. The disassembled perspective view of a coating nozzle assembly. The perspective view of a 1st liquid nozzle half body. The perspective view of a shim board. FIG. 6 is an enlarged view of a portion VI surrounded by a circle in FIG. 5. Sectional drawing of an application nozzle assembly. The figure which shows the shim board and 1st cavity part of the largest application | coating width. 1 is a perspective view of a shim plate according to Embodiment 1. FIG. The enlarged view of the part X enclosed with the circle | round | yen of FIG. 1 is a front view of a shim plate according to Embodiment 1. FIG. Sectional drawing of the shim board of Example 1 taken along the XII-XII line of FIG. The figure which shows the shim board of Example 1, and a 1st cavity part. FIG. 14 is an enlarged view of a portion XIV surrounded by a circle in FIG. 13. FIG. 3 is a partially enlarged cross-sectional view of a coating nozzle assembly in which the shim plate of Example 1 is incorporated. FIG. 14 is an enlarged view of a portion XVI surrounded by a circle in FIG. 13. The figure which shows the shim board and 1st cavity part of a reference example. The enlarged view of the part XVIII enclosed with the circle | round | yen of FIG. FIG. 6 is a perspective view of a shim plate according to a second embodiment. The enlarged view of the part XX enclosed with the circle | round | yen of FIG. The front view of the shim board of Example 2. FIG. Sectional drawing of the shim board of Example 2 taken along the XXII-XXII line of FIG. The figure which shows the shim board of Example 2, and a 1st cavity part. The enlarged view of the part XXIV enclosed with the circle | round | yen of FIG. FIG. 6 is a partially enlarged cross-sectional view of a coating nozzle assembly in which a shim plate of Example 2 is incorporated. The enlarged view of the part XXVI enclosed with the circle | round | yen of FIG. The front view of the shim board of the modification 1. FIG. The front view of the shim board of the modification 2. FIG. The front view of the shim board of the modification 3. FIG. The partial expanded sectional view of the application nozzle assembly incorporating the shim board of the modification 4.

  Hereinafter, the present invention will be described based on embodiments with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the following embodiments are not intended to limit the scope of the present invention only to those unless otherwise specified. Absent.

(Coating system)
FIG. 1 is a schematic diagram showing a coating system 100. The coating device (applicator) 4 includes a coating nozzle assembly 1, a manifold block 2 and a hot air manifold block 3. The coating nozzle assembly 1 is attached to the manifold block 2. The hot air manifold block 3 is attached to the manifold block 2. The application nozzle assembly 1 applies a liquid to an object to be coated. The liquid is, for example, a fluid material such as a melt, an adhesive, or a foam. The object to be coated is a base material such as a synthetic film, a nonwoven fabric, a stretchable body, or a flat plate. The coating system 100 of this embodiment applies a hot melt adhesive to a base material that moves relative to the coating device 4. However, the present invention is not limited to hot melt adhesives.

  The manifold block 2 is connected to a melter (liquid supply source) 6 via a hot melt hose (liquid conduit) 5. The melter 6 includes a hot melt tank (not shown) that melts the hot melt adhesive and a pump (not shown) that pumps the hot melt adhesive to the coating device 4. The hot melt hose 5 communicates with a liquid passage 7 provided in the manifold block 2. The hot melt adhesive is supplied from the hot melt hose 5 through the liquid passage 7 to the coating nozzle assembly 1. The hot air manifold block 3 is connected to a hot air generator (air supply source) 10 via hot air hoses (air conduits) 8 and 9. The hot air generator pumps hot air to the coating device 4. The hot air hoses 8 and 9 communicate with air passages 11 and 12 provided in the hot air manifold block 3, respectively. The air passages 11 and 12 communicate with air passages 13 and 14 provided in the manifold block 2, respectively. Hot air is supplied from the hot air hoses 8 and 9 to the coating nozzle assembly 1 through the air passages 11, 12, 13 and 14. A gas such as nitrogen may be used instead of air.

(Coating nozzle assembly)
FIG. 2 is a view showing the coating nozzle assembly 1. FIG. 3 is an exploded perspective view of the coating nozzle assembly 1. The application nozzle assembly 1 includes a first liquid nozzle half (first material nozzle block) 15, a second liquid nozzle half (second material nozzle block) 16, and a first air nozzle half (first gas nozzle block). 17, a second air nozzle half (second gas nozzle block) 18 and a shim plate 19. The shim plate 19 is sandwiched between the first liquid nozzle half 15 and the second liquid nozzle half 16. The first liquid nozzle half 15 and the second liquid nozzle half 16 are fastened by a plurality of screws 20 with a shim plate 19 interposed therebetween. The first air nozzle half 17 is superimposed on the first liquid nozzle half 15. The second air nozzle half 18 is superimposed on the second liquid nozzle half 16. The first air nozzle half 17 and the first liquid nozzle half 15 are fixed to the manifold block 2 by a plurality of screws 21. The second air nozzle half 18 and the second liquid nozzle half 16 are fixed to the manifold block 2 by a plurality of screws 22.

  FIG. 4 is a perspective view of the first liquid nozzle half 15. The shim plate 19 contacts the surface 15 a of the first liquid nozzle half 15. The surface 15 a is provided with an elongated first cavity 23 extending in the longitudinal direction A of the first liquid nozzle half 15. A plurality of air inlets 25 for receiving air from the air passage 13 of the manifold block 2 are provided on the top surface 15 b of the first liquid nozzle half 15. Further, as shown in FIG. 3, an elongated second cavity 24 extending in the longitudinal direction A of the second liquid nozzle half 16 is formed on the surface 16 a of the second liquid nozzle half 16 with which the shim plate 19 contacts. Is provided. The top surface 16 b of the second liquid nozzle half 16 has a plurality of air inlets 26 that receive air from the air passage 14 of the manifold block 2 and a plurality of liquid inlets (material inlets) that receive liquid from the liquid passage 7 of the manifold block 2. 27 is provided.

  FIG. 5 is a perspective view of the shim plate 19. FIG. 6 is an enlarged view of a portion VI surrounded by a circle in FIG. The shim plate 19 is provided with a plurality of fine through holes 19a. When the shim plate 19 is assembled into the application nozzle assembly 1, the through hole 19 a connects the first cavity 23 of the first liquid nozzle half 15 and the second cavity 24 of the second liquid nozzle half 16. Communicate. The plurality of fine through holes 19a function as a filter for removing foreign substances in the liquid. The shim plate 19 has a plurality of slots (slits) 19b formed in a comb shape. When the shim plate 19 is incorporated into the application nozzle assembly 1, the plurality of slots 19b define a plurality of liquid slots (material slots) 29 (FIG. 7) for extruding the hot melt adhesive. The shim plate 19 is a thin plate with a slot that is sandwiched between the first liquid nozzle half 15 and the second liquid nozzle half 16 in order to adjust the gap of the liquid slot 29 for extruding the hot melt adhesive. . By changing the thickness of the shim plate 19, the gap of the liquid slot 29 can be changed.

  FIG. 7 is a cross-sectional view of the application nozzle assembly 1. Hot melt adhesive is supplied from the liquid passage 7 of the manifold block 2 to the liquid inlet 27 of the second liquid nozzle half 16. The liquid passage (material passage) 28 communicates the liquid inlet 27 and the second cavity 24. Hot melt adhesive flows from the liquid inlet 27 through the liquid passage 28 to the second cavity 24. The hot melt adhesive flows from the second cavity portion 24 through the through hole 19 a of the shim plate 19 to the first cavity portion 23. The hot melt adhesive flows from the first cavity 23 to the liquid slot 29 and is pushed out from the liquid slot 29 to the article to be coated.

  Air is supplied from the air passage 13 of the manifold block 2 to the air inlet (gas inlet) 25 of the first liquid nozzle half 15. The first liquid nozzle half 15 has an air passage (gas passage) 30. The first air nozzle half 17 has an air passage (gas passage) 31. The air passage 30 of the first liquid nozzle half 15 communicates with the air inlet 25 and the air passage 31 of the first air nozzle half 17. The air passage 31 of the first air nozzle half 17 communicates with an air slot (gas slot) 32 formed between the first air nozzle half 17 and the first liquid nozzle half 15. Air flows from the air inlet 25 through the air passage 30 and the air passage 31 to the air slot 32. Air is injected from the air slot 32.

  Similarly, air is supplied from the air passage 14 of the manifold block 2 to the air inlet (gas inlet) 26 of the second liquid nozzle half 16. The second liquid nozzle half 16 has an air passage (gas passage) 33. The second air nozzle half 18 has an air passage (gas passage) 34. The air passage 33 of the second liquid nozzle half 16 communicates with the air inlet 26 and the air passage 34 of the second air nozzle half 18. The air passage 34 of the second air nozzle half 18 communicates with an air slot (gas slot) 35 formed between the second air nozzle half 18 and the second liquid nozzle half 16. Air flows from the air inlet 26 through the air passage 33 and the air passage 34 to the air slot 35. Air is injected from the air slot 35.

  The air jetted from the air slots 32 and 35 spreads the hot melt adhesive into a curtain shape or stretches into a fiber shape before the hot melt adhesive pushed out from the liquid slot 29 reaches the workpiece. The application nozzle assembly 1 is a so-called control coat nozzle (CC nozzle). An O-ring (sealing member) 36 that seals between the air inlet 25, the air inlet 26, and the liquid inlet 27 of the coating nozzle assembly 1 and the manifold block 2 is provided at each of the inlets 25, 26, and 27. .

  The shim plate 19 is used when a hot melt adhesive is applied from the application nozzle assembly 1 with the maximum application width Lmax. FIG. 8 is a view showing the shim plate 19 and the first cavity 23 having the maximum application width Lmax. FIG. 8 shows the surface of the shim plate 19 attached to the surface 15 a of the first liquid nozzle half 15. FIG. 8 shows the first cavity 23 when the shim plate 19 is attached to the first liquid nozzle half 15 by a white broken line. The width of the plurality of slots 19b in the shim plate 19 corresponds to the maximum application width Lmax of the liquid applied from the application nozzle assembly 1 to the object to be coated. The maximum application width Lmax of the plurality of slots 19b of the shim plate 19 is substantially equal to the length L of the first cavity 23 of the first liquid nozzle half 15 in the longitudinal direction A. If the length L of the first cavity portion 23 is larger than the maximum application width Lmax, the shim plate 19 and the first cavity portion 23 are covered with the shim plate 19 even if the first cavity portion 23 is covered with the shim plate 19. The hot melt adhesive may leak from between the first liquid nozzle half 15 and the first liquid nozzle half 15. Therefore, the length L of the first cavity portion 23 is made substantially equal to the maximum application width Lmax of the plurality of slots 19b of the shim plate 19.

(Shim plate for changing coating width)
Next, the shim plate 39 for changing the coating width according to the first embodiment will be described. FIG. 9 is a perspective view of the shim plate 39 of the first embodiment. FIG. 10 is an enlarged view of a portion X surrounded by a circle in FIG. FIG. 11 is a front view of the shim plate 39 according to the first embodiment. The shim plate 39 is used to reduce the liquid application width from Lmax to L1. The shim plate 39 is provided with a plurality of through holes 39a, a plurality of slots (cutout portions) 39b, and a lateral groove 40. The shim plate 39 has an application area CZ where the hot melt adhesive is applied to the object to be coated and a non-application area NCZ where the hot melt adhesive is not applied to the object. The plurality of through holes 39a and the plurality of slots 39b are provided in the application zone CZ (application width L1). In the application zone CZ, the first cavity 23 communicates with the plurality of slots 39 b of the shim plate 39. In the non-application area NCZ, the first cavity 23 is covered with a shim plate 39. The transverse groove 40 is provided over the entire non-application area NCZ. As shown in FIG. 10, the lateral groove 40 communicates with the groove hole 39 b at one end 40 a in the longitudinal direction A of the lateral groove 40. In the longitudinal direction A of the shim plate 39, the length of the lateral groove 40 may be longer than the length of the non-application area NCZ. The lateral groove 40 is provided in parallel with the first cavity 23.

  FIG. 12 is a cross-sectional view of the shim plate 39 of the first embodiment taken along line XII-XII in FIG. In the present embodiment, the depth T1 of the lateral groove 40 is half of the thickness T of the shim plate 39. However, the depth T1 of the lateral groove 40 of the shim plate 39 of the present invention is not limited to half of the thickness T of the shim plate 39, and the depth T1 may be smaller or larger than half of the thickness T. Also good.

  FIG. 13 is a diagram illustrating the shim plate 39 and the first cavity 23 according to the first embodiment. FIG. 13 shows the surface of the shim plate 39 attached to the surface 15 a of the first liquid nozzle half 15. FIG. 13 shows the first cavity 23 when the shim plate 39 is attached to the first liquid nozzle half 15 with a white broken line and a black broken line. The shim plate 39 is used when a hot melt adhesive is applied from the coating nozzle assembly 1 with a coating width L1. The application width L1 is smaller than the maximum application width Lmax (L1 <Lmax). The length of the plurality of slots 39 b in the shim plate 39 in the longitudinal direction A is shorter than the length L of the first cavity 23 in the longitudinal direction A. The length in the longitudinal direction A of the plurality of slots 39b of the shim plate 39 corresponds to the application width L1 of the liquid applied from the application nozzle assembly 1 to the object. The coating width L1 corresponds to the length of the coating zone CZ in which a plurality of slots 39b are provided. In the first embodiment, the shim plate 39 is provided with a plurality of slots 39b, but is not limited thereto. Instead of the plurality of slots 39b, one cutout portion having a width L1 may be provided in the shim plate 39.

  The position of the one end 39bR of the application zone CZ in which the plurality of slots 39b are arranged substantially coincides with the position of the one end 23R of the first cavity 23. The lateral groove 40 is provided along the first cavity portion 23 in the longitudinal direction A of the shim plate 39 in a portion where the plurality of groove holes 39b are not provided. The lateral groove 40 extends in the longitudinal direction A of the shim plate 39 from the other end portion 39bL of the application zone CZ in which the plurality of slot holes 39b are arranged, beyond the other end portion 23L of the first cavity portion 23. That is, the lateral groove 40 extends over the non-application part NCZ of the first cavity part 23. FIG. 14 is an enlarged view of a portion XIV surrounded by a circle in FIG. As shown in FIG. 14, the other end 40 b of the lateral groove 40 extends to the outside of the other end 23 </ b> L of the first cavity 23. Even if the hot-melt adhesive leaks from the other end portion 23L of the first cavity 23 through the shim plate 39 and the first liquid nozzle half 15, the leaked hot-melt adhesive is indicated by the arrow in FIG. As shown in FIG. Therefore, it is possible to prevent the hot melt adhesive from leaking out of the coating nozzle assembly 1 through between the shim plate 39 and the first liquid nozzle half 15.

  FIG. 15 is a partially enlarged sectional view of the coating nozzle assembly 1 incorporating the shim plate 39 of the first embodiment. FIG. 15 is a cross section of the application nozzle assembly 1 in the non-application part NCZ. The shim plate 39 is attached to the first liquid nozzle half 15 such that the upper portion of the lateral groove 40 of the shim plate 39 is disposed to face the lower portion of the first cavity 23 of the first liquid nozzle half 15. The upper part of the lateral groove 40 of the shim plate 39 communicates with the lower part of the first cavity 23. In the present embodiment, the lower end portion 23a of the first cavity portion 23 is located substantially at the center of the lateral groove 40 in the height direction. However, the lower end 23a of the first cavity 23 may be located above or below the center of the lateral groove 40 in the height direction. The hot melt adhesive flows into the lateral groove 40 directly from the first cavity 23. As shown in FIG. 10, the lateral groove 40 communicates with the groove hole 39 b at one end 40 a in the longitudinal direction A of the lateral groove 40. FIG. 16 is an enlarged view of a portion XVI surrounded by a circle in FIG. The hot melt adhesive that has flowed from the first cavity portion 23 into the lateral groove 40 flows from one end portion 40a of the lateral groove 40 into the groove hole 39b as shown by the arrow in FIG. 16, and is applied to the object to be coated from the groove hole 39b. Therefore, the hot melt adhesive in the first cavity 23 can be prevented from leaking from between the shim plate 39 and the first liquid nozzle half 15 to the outside of the application nozzle assembly 1.

  The shim plate 39 of the first embodiment is provided with a lateral groove 40 along the first cavity 23 in the non-application area NCZ. The lateral groove 40 communicates directly with the first cavity 23. The shim plate 39 is configured to appropriately flow the hot melt adhesive from the first cavity 23 through the lateral groove 40 to the application zone CZ. Therefore, it is possible to prevent the hot melt adhesive from leaking out of the application nozzle assembly 1. When the application width is changed using the shim plate 39 of the first embodiment, it is not necessary to change the length in the longitudinal direction A of the first cavity 23 of the first liquid nozzle half 15. That is, it is not necessary to recreate the first liquid nozzle half 15. In order to change the coating width, it is only necessary to replace the shim plate 19 with the shim plate 39. Therefore, the cost required for changing the coating width can be reduced.

(Reference example)
FIG. 17 is a view showing the shim plate 49 and the first cavity 23 of the reference example. Similar to the shim plate 39 of the first embodiment, the shim plate 49 of the reference example is used to reduce the liquid application width from Lmax to L1. A plurality of through holes 49 a and a plurality of slots 49 b are provided in the application zone CZ (application width L 1) of the shim plate 49. However, the shim plate 49 is not provided with the lateral groove 40 in the non-application area NCZ of the shim plate 49. FIG. 18 is an enlarged view of a portion XVIII surrounded by a circle in FIG. The first cavity 23 is covered by the shim plate 49, but the hot melt adhesive is applied from the first cavity 23 in the non-application area NCZ through the first liquid nozzle half 15 and the shim plate 49. There is a possibility of leaking out of the nozzle assembly 1.

  Therefore, when the shim plate 49 of the reference example is used, the length of the first cavity 23 of the first liquid nozzle half 15 corresponds to the application zone CZ (application width L1) provided with a plurality of slots 49b. It is necessary to change to the length to be. That is, in the case of the shim plate 49 of the reference example, the first cavity portion 23 having a length corresponding to the length of the application zone CZ (application width L1) is provided so that no liquid leaks from the non-application zone NCZ. One liquid nozzle half 15 needs to be made.

  On the other hand, the shim plate 39 according to the first embodiment can change the coating width by simply replacing the shim plate 19 with the shim plate 39 without having to recreate the first liquid nozzle half 15. Therefore, it is possible to save the cost of remaking the first liquid nozzle half 15.

  Next, Example 2 will be described. Since the coating system and the coating nozzle assembly of the second embodiment are the same as those of the first embodiment, description thereof is omitted. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The lateral groove 41 of the shim plate 59 of the second embodiment has a lateral groove 40 of the shim plate 39 of the first embodiment in that the vertical groove 41 c is provided at the end and that the lateral groove 41 is provided away from the first cavity portion 23. And different. Hereinafter, the shim plate 59 of the second embodiment will be described.

(Shim plate for changing coating width)
FIG. 19 is a perspective view of the shim plate 59 of the second embodiment. FIG. 20 is an enlarged view of a portion XX surrounded by a circle in FIG. FIG. 21 is a front view of the shim plate 59 of the second embodiment. Similar to the first embodiment, the shim plate 59 is used to reduce the liquid application width from Lmax to L1. The shim plate 59 is provided with a plurality of through holes 59a, a plurality of slots (cutout portions) 59b, and a lateral groove 41. The shim plate 59 has an application area CZ where the hot melt adhesive is applied to the object to be coated and a non-application area NCZ where the hot melt adhesive is not applied to the object. The plurality of through holes 59a and the plurality of slots 59b are provided in the application zone CZ (application width L1). In the application zone CZ, the first cavity 23 communicates with the plurality of slots 59 b of the shim plate 59. In the non-application area NCZ, the first cavity 23 is covered with a shim plate 59. The lateral groove 41 is provided over the entire non-application area NCZ. As shown in FIG. 20, the lateral groove 41 communicates with the groove hole 59 b at one end 41 a in the longitudinal direction A of the lateral groove 41. In the longitudinal direction A of the shim plate 59, the length of the lateral groove 41 may be longer than the length of the non-application area NCZ. The lateral groove 41 is provided in parallel with the first cavity 23.

  22 is a cross-sectional view of the shim plate 59 of Example 2 taken along the line XXII-XXII of FIG. In the present embodiment, the depth T1 of the lateral groove 41 is half of the thickness T of the shim plate 5. However, the depth T1 of the lateral groove 41 of the shim plate 59 of the present invention is not limited to half of the thickness T of the shim plate 59, and the depth T1 is smaller or larger than half of the thickness T. Also good.

  FIG. 23 is a diagram illustrating the shim plate 59 and the first cavity 23 according to the second embodiment. FIG. 23 shows the surface of the shim plate 59 attached to the surface 15 a of the first liquid nozzle half 15. FIG. 23 shows the first cavity 23 when the shim plate 59 is attached to the first liquid nozzle half 15 with a white broken line and a black broken line. The shim plate 59 is used when a hot melt adhesive is applied from the coating nozzle assembly 1 with a coating width L1. The application width L1 is smaller than the maximum application width Lmax (L1 <Lmax). The length in the longitudinal direction A of the plurality of slots 59 b of the shim plate 59 is shorter than the length L of the first cavity 23 in the longitudinal direction A. The length in the longitudinal direction A of the plurality of slots 59b of the shim plate 59 corresponds to the application width L1 of the liquid applied from the application nozzle assembly 1 to the object. The coating width L1 corresponds to the length of the coating zone CZ in which a plurality of slots 59b are provided. In the second embodiment, the plurality of slots 59b are provided in the shim plate 59, but the present invention is not limited to this. One cut portion having a width L1 may be provided in the shim plate 59 instead of the plurality of slots 59b.

  The position of one end 59bR of the application zone CZ in which the plurality of slots 59b are arranged substantially coincides with the position of the one end 23R of the first cavity 23. The lateral groove 41 is provided along the first cavity portion 23 in the longitudinal direction A of the shim plate 59 in a portion where the plurality of groove holes 59b are not provided. The lateral groove 41 extends in the longitudinal direction A of the shim plate 59 from the other end portion 59bL of the application zone CZ in which the plurality of groove holes 59b are arranged, beyond the other end portion 23L of the first cavity portion 23. That is, the lateral groove 41 extends over the non-application part NCZ of the first cavity part 23. The lateral groove 41 extends away from the first cavity 23 and along the first cavity 23. FIG. 24 is an enlarged view of a portion XXIV surrounded by a circle in FIG. As shown in FIG. 24, the other end 41 b of the lateral groove 41 extends to the outside of the other end 23 </ b> L of the first cavity 23. A longitudinal groove 41 c extends from the other end 41 b in a direction perpendicular to the longitudinal direction A of the shim plate 59. The lateral groove 41 has an L shape. However, the lateral groove 41 is not limited to the L shape. The groove connecting the other end 41b of the horizontal groove 41b and the vertical groove 41c may be curved. The vertical groove 41c does not need to be a straight line and may be curved. The groove only needs to extend from the other end portion 41b of the lateral groove 41b in a direction perpendicular to the longitudinal direction A of the shim plate 59 so as to partially surround the other end portion 23L of the first cavity portion 23.

  Even if the hot melt adhesive leaks from the other end 23L of the first cavity 23 through the shim 59 and the first liquid nozzle half 15, the leaked hot melt adhesive is indicated by an arrow in FIG. As shown, it flows into the lateral groove 41. Accordingly, it is possible to prevent the hot melt adhesive from leaking out of the application nozzle assembly 1 through the space between the shim plate 59 and the first liquid nozzle half 15.

  FIG. 25 is a partially enlarged cross-sectional view of the coating nozzle assembly 1 in which the shim plate 59 of the second embodiment is incorporated. FIG. 25 is a cross section of the coating nozzle assembly 1 in the non-coating portion NCZ. The shim plate 59 is arranged such that the lateral groove 41 of the shim plate 59 is disposed below the first cavity 23 of the first liquid nozzle half 15 and away from the lower end 23 a of the first cavity 23. Attached to half 15. The lateral groove 41 of the shim plate 59 does not communicate with the first cavity 23. As shown in FIG. 20, the lateral groove 41 communicates with the groove hole 59 b at one end 41 a in the longitudinal direction A of the lateral groove 41. FIG. 26 is an enlarged view of a portion XXVI surrounded by a circle in FIG. Even if the hot melt adhesive leaks between the first liquid nozzle half 15 and the shim plate 59 from the first cavity 23, the hot melt adhesive flows into the lateral groove 41. The hot melt adhesive that has flowed into the lateral groove 41 flows from one end 41a of the lateral groove 41 into the slot 59b as shown by the arrow in FIG. 26, and is applied to the article to be coated from the slot 59b. Accordingly, it is possible to prevent the hot melt adhesive in the first cavity 23 from leaking from between the shim plate 59 and the first liquid nozzle half 15 to the outside of the application nozzle assembly 1.

  The shim plate 59 of the second embodiment is provided with a lateral groove 41 along the first cavity 23 in the non-application area NCZ. The lateral groove 41 is provided along the first cavity 23 away from the first cavity 23. The other end portion 41 b of the horizontal groove 41 is provided with a vertical groove 41 c extending so as to partially surround the other end portion 23 </ b> L of the first cavity portion 23. Therefore, even if the hot melt adhesive leaks from the first cavity 23 between the first liquid nozzle half 15 and the shim plate 59, the leaked hot melt adhesive flows into the lateral groove 41 and hot through the lateral groove 41. The melt adhesive can be properly flowed to the application zone CZ. Therefore, it is possible to prevent the hot melt adhesive from leaking out of the application nozzle assembly 1. When the application width is changed using the shim plate 59 of the second embodiment, it is not necessary to change the length in the longitudinal direction A of the first cavity 23 of the first liquid nozzle half 15. That is, it is not necessary to recreate the first liquid nozzle half 15. In order to change the coating width, it is only necessary to replace the shim plate 19 with the shim plate 59. Therefore, the cost required for changing the coating width can be reduced.

(Modification)
In Example 1 and Example 2, the lateral grooves 40 and 41 are provided on one side of the application zone CZ. However, the present invention is not limited to this. For example, the lateral grooves 40 and 41 may be provided on both sides of the application zone CZ. FIG. 27 is a front view of the shim plate 69 of the first modification. The lateral grooves 40 are provided on both sides of the application zone CZ where the plurality of through holes 69a and the plurality of slots (cutout portions) 69b are provided. FIG. 28 is a front view of a shim plate 79 of the second modification. L-shaped lateral grooves 41 are provided on both sides of the application zone CZ where a plurality of through holes 79a and a plurality of slots (cutout portions) 79b are provided. If the lateral groove 40 or 41 is provided along the first cavity 23 in the non-application area NCZ, the same effects as those of the first and second embodiments can be obtained.

  Further, a lateral groove may be provided between the application zone CZ and the application zone CZ. FIG. 29 is a front view of a shim plate 89 of the third modification. A transverse groove 40 communicating with the first cavity 23 or a transverse groove 41 separated from the first cavity 23 between a plurality of application zones CZ provided with a plurality of through-holes 89a and a plurality of slots (cutouts) 89b. Is provided. If the lateral grooves 40 and 41 are provided along the first cavity 23 in the non-application area NCZ, the same effects as those of the first and second embodiments can be obtained.

  In the first embodiment, the second embodiment, the first modification, the second modification, and the third modification, the lateral grooves 40 and / or 41 are provided on the surface of the shim plate that is in contact with the surface 15 a of the first liquid nozzle half 15. However, when there is a possibility that the hot melt adhesive may leak from between the second liquid nozzle half 16 and the shim plate, the lateral grooves 40 and / or 41 are provided on the surface of the shim plate in contact with the second liquid nozzle half 16. Also good. Further, the lateral grooves 40 and / or 41 may be provided on both sides of the shim plate. FIG. 30 is a partial enlarged cross-sectional view of the coating nozzle assembly 1 in which the shim plate 99 according to the fourth modification is incorporated. A lateral groove 40 is provided on the surface of the shim plate 99 in contact with the first liquid nozzle half 15, and a lateral groove 41 is provided on the surface of the shim plate 99 in contact with the second liquid nozzle half 16. With this configuration, it is possible to prevent the hot melt adhesive from leaking from both sides of the shim plate 99. In the fourth modification, the position of the lateral groove 40 and the position of the lateral groove 41 are shifted in a direction perpendicular to the longitudinal direction A of the shim plate 99. However, the position of the lateral groove 40 and the position of the lateral groove 41 are not necessarily shifted. Moreover, in the said Example and the said modification, the lateral grooves 40 and 41 are formed as a groove | channel which does not penetrate a shim board. However, the lateral grooves 40 and 41 may partially have a hole penetrating the shim plate.

  According to the above embodiment and the above modification according to the present invention, the coating width can be changed while preventing liquid leakage.

  The present invention is not limited to the above embodiments, and can be implemented in various other forms without departing from the features thereof. For this reason, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is shown by the scope of claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

1 ... coating nozzle assembly 15 ... first liquid nozzle half (first material nozzle block)
16 ... Second liquid nozzle half (second material nozzle block)
17 ... first air nozzle half (first gas nozzle block)
18 ... Second air nozzle half (second gas nozzle block)
39, 59, 69, 79, 89, 99 ... shim plate 23 ... first cavity 24 ... second cavity 29 ... liquid slot (material slot)
39b, 59b, 69b, 79b, 89b ... a plurality of slots (cutout portions)
41, 42 ... lateral groove Lmax ... maximum application width L1 ... application width L ... length of the first cavity

Claims (15)

An application nozzle assembly for extruding a fluid material,
A first material nozzle block;
A second material nozzle block;
A shim plate disposed between the first material nozzle block and the second material nozzle block;
With
The first material nozzle block is provided with a cavity extending in the longitudinal direction of the application nozzle assembly,
The shim plate is provided along the cavity portion in a portion of the shim plate that is not provided with the cutout portion in the longitudinal direction, and a cutout portion that defines a material slot that communicates with the cavity portion and extrudes the fluid material. And an application nozzle assembly provided with a lateral groove communicating with the cut-out portion.   The coating nozzle assembly according to claim 1, wherein the lateral groove extends beyond the end of the cavity in the longitudinal direction.   The coating nozzle assembly according to claim 2, wherein an end of the lateral groove extends so as to partially surround the end of the cavity.   The coating nozzle assembly according to claim 3, wherein the lateral groove is formed in an L shape.   The coating nozzle assembly according to claim 1, wherein the lateral groove communicates with the hollow portion.   The coating nozzle assembly according to any one of claims 1 to 4, wherein the lateral groove is provided apart from the cavity.   The application nozzle assembly according to any one of claims 1 to 6, wherein the lateral groove is provided on each of both sides of the cutout portion.   The application nozzle assembly according to any one of claims 1 to 6, wherein a plurality of the cutout portions are provided, and the lateral groove is provided between the plurality of cutout portions.   The coating nozzle assembly according to any one of claims 1 to 8, wherein the lateral grooves are respectively provided on both surfaces of the shim plate.   The coating nozzle assembly according to any one of claims 1 to 9, wherein a length of the hollow portion in the longitudinal direction is equal to a maximum coating width of the fluid material pushed out from the coating nozzle assembly.   The coating nozzle assembly according to claim 1, wherein the cut-out portion is formed by a plurality of slots. The second material nozzle block includes a material inlet for receiving a fluid material, a cavity extending in the longitudinal direction, and a material passage communicating the cavity and the material inlet of the second material nozzle block. And
The said shim board is provided with the some through-hole which connects the said cavity part of the said 1st material nozzle block, and the said cavity part of the said 2nd material nozzle block. The coating nozzle assembly as described. A first gas nozzle block forming a gas slot with the first material nozzle block;
A second gas nozzle block forming a gas slot with the second material nozzle block;
Further comprising
The coating nozzle assembly according to claim 1, wherein the gas injected from the gas slot stretches the fluid material pushed out of the material slot. A shim plate incorporated into an application nozzle assembly for extruding fluid material,
When the shim plate is disposed between the first material nozzle block and the second material nozzle block, the shim plate communicates with a cavity of the first material nozzle block extending in the longitudinal direction of the application nozzle assembly. A cutout defining a material slot for extruding the fluid material;
A shim plate in which a portion of the shim plate that is not provided with the cutout portion in the longitudinal direction is provided with a lateral groove that is provided along the hollow portion and communicates with the cutout portion.   The shim plate according to claim 14, wherein the lateral groove is formed in an L shape.