JP2821832B2 - Hot melt adhesive application equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a hot melt adhesive beat discharged from an application nozzle of an adhesive application nozzle device, and pressurized air from an air nozzle adjacent to the application nozzle is drawn. The present invention relates to a hot melt adhesive coating device for forming a thin adhesive coating surface on an upper surface of a substrate by applying a thin and long fiber-like adhesive to a substrate on an upper surface of an adhesive application line. .

[0002]

2. Description of the Related Art In applying a hot melt adhesive to a base material on an upper surface of an adhesive application line, a hot melt adhesive beat discharged from an application nozzle of an adhesive application nozzle device is applied to a hot melt adhesive beat from an air nozzle adjacent to the application nozzle. 2. Description of the Related Art Coating apparatuses for supplying an adhesive thinly to a base material on an upper surface of an adhesive application line in an elongated fiber shape by contacting and stretching with pressurized air are known. In addition, by applying a pressurized air that comes into contact with a hot melt adhesive beat discharged from the application nozzle as a rotary jet, the application is performed in a spiral spray pattern, thereby expanding the application range and increasing the application width. The method is disclosed in
No. 1-200869, "Method and Apparatus for Spraying Melt Adhesive".

[0003]

When the hot melt adhesive H is applied to the substrate on the upper surface of the adhesive application line in the spiral spray pattern described above, the hot melt adhesive H is applied to the substrate.
As shown in FIG. 10, the application state of a large number of circles overlaps, and in the portion indicated by R in FIG. 10, the application thickness of the hot melt adhesive becomes large due to the overlap of the circles of the adhesive beats, and However, there is a problem that a coating surface having a uniform coating thickness cannot be obtained. Further, the application width is determined by the diameter of the spiral spray pattern circle and is constant, and there is a problem that the application width cannot be set arbitrarily.

[0004]

According to a first aspect of the present invention, a plurality of coating nozzle holes are arranged in a direction intersecting with the direction of transport of a substrate in a coating line to form a group of coating nozzle holes. On the front side and the rear side of the transfer of the base material, air nozzle holes formed of a number of air nozzle holes are formed in parallel with the coating nozzle holes in close proximity to the coating nozzle holes, and a large number of coatings of the coating nozzle holes are formed. The nozzle hole is connected to an adhesive supply source via an adhesive supply control valve, and the hot melt adhesive in an elongated fiber state is intermittently applied in a screen shape to the base material on the upper surface of the application line. The second invention of the present application is directed to forming a group of coating nozzle holes by arranging a number of coating nozzle holes in a direction intersecting with the direction of transport of the substrate in the coating line, and performing a forward and a backward transport of the substrate in the group of coating nozzle holes. On the side, an air nozzle hole group formed of a number of air nozzle holes approaching the application nozzle hole group is formed in parallel with the application nozzle hole group, and a part of the many application nozzle holes of the application nozzle hole group is masked. The communication pattern is cut off so that the coating pattern can be selected, and the hot melt adhesive in the form of an elongated fiber is screen-shaped and the coating pattern in the width direction of the base material is selectively applied to the base material on the upper surface of the coating line.

According to a third aspect of the present invention, a plurality of coating nozzle holes are arranged in a direction intersecting with the direction of transport of a substrate in a coating line to form a group of coating nozzle holes, and the forward side of the substrate in the group of coating nozzle holes is transported. In addition, on the rear side of the conveyance, an air nozzle hole group consisting of a number of air nozzle holes is formed in parallel with the coating nozzle holes in close proximity to the coating nozzle holes, and a number of coating nozzle holes of the coating nozzle holes are supplied with adhesive. Connected to the adhesive supply via a control valve,
The coating range can be selected by blocking some of the coating nozzle holes in the coating nozzle hole group with a mask plate, and the hot melt adhesive in the form of elongated fibers is applied to the base material on the upper surface of the coating line in a screen form. An application pattern in the substrate width direction and an application pattern in the substrate transport direction are selectively applied. The fourth invention of the present application is directed to forming a group of coating nozzle holes by arranging a number of coating nozzle holes in a direction intersecting with the conveying direction of the base material of the coating line, and forming a number of horizontal holes respectively communicating with the coating nozzle holes. The coating nozzle hole plate opened on the side surface has a first block having an air nozzle hole group including a large number of air nozzle holes, a lateral groove, a hot melt adhesive supply hole, and an air nozzle hole group similar to the first block. Second
A mask plate having the same thickness as each other between the coating nozzle hole plate and the first block and between the coating nozzle hole plate and the second block. The coating pattern in the width direction of the base material can be selected by connecting some of the many horizontal holes of the coating nozzle hole plate corresponding to the mask window of the hot melt adhesive supply hole and the adhesive supply source. The operation control of the adhesive supply control valve interposed in between makes it possible to select the application pattern in the substrate transfer direction of the application line, and the selection of the mask plate and the operation control of the adhesive supply control valve makes the application pattern selectable. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. The adhesive application nozzle device B is disposed so as to face an upper layer of the base material W being transported in the transport direction P by the adhesive application line A. The adhesive application nozzle device B positions the application nozzle hole group 11 in a direction intersecting with the transport direction P of the base material W (in the example W, an orthogonal direction, that is, a transverse direction of the adhesive application line A). A nozzle unit 1 disposed above the adhesive application line A, and an adhesive supply control valve 2 integrated with the nozzle unit 1,
The nozzle unit 1 includes an application nozzle hole group 11 formed by a large number of application nozzle holes 11a, and a large number of air nozzle holes 12a formed on the conveyance front side A and the conveyance rear side B of the application nozzle hole group 11. An air nozzle hole group 12F and an air nozzle hole group 12R are provided. The air nozzle hole group 12F and the air nozzle hole group 12R are connected to the pressurized air source 4 via the pressurized air hole 13, and the application nozzle hole group 11 is connected to the hot melt adhesive supply source (adhesive tank and pressure-feeding ponk) 3 It is connected to the. A heater 6 is provided inside the nozzle unit 1 and the adhesive supply control valve 2 to maintain the hot melt adhesive being supplied in a predetermined temperature range.

Referring to FIG. 2, the coating nozzle hole group 11 and the air nozzle hole groups 12F and 12R are arranged in a straight line in parallel in a direction perpendicular to the conveying direction P of the base material W. Although the air nozzle holes 12a are located near the front and rear of the application nozzle holes 11a of the group 11 in the conveyance direction, as shown in FIG. 3, the application nozzle hole groups 11 are arranged in two or more rows (see FIG. The object of the present invention can also be achieved by an arrangement in which the application nozzle holes 11a are located between the air nozzle holes 12a (see FIG. C). The adhesive supply control valve 2 is provided with a valve chamber 24 in a valve housing 20 having a hot melt adhesive inlet 21, a supply port 22, and a return port 23, and operates a valve body 25 that can move up and down in the valve chamber. By operating up and down by a valve body operating mechanism 26 operated by an air or an electromagnetic valve, supply of hot melt adhesive to the nozzle unit 1 and switching of shutoff,
The hot-melt adhesive is returned to the hot-melt adhesive supply source 3 through the return port 23 at the time of shut-off, so that the hot-melt adhesive is circulated at the time of application suspension to prevent deterioration due to stagnation of the hot-melt adhesive.

Referring to FIG. 1, a base material (work material to be coated with hot melt adhesive H,
For example, a sheet-like polyester film) W is placed and transported in one direction (P direction), and a hot melt adhesive H is applied from an adhesive application nozzle device B provided above the adhesive application line A to apply the adhesive. Spraying the hot melt adhesive H onto a predetermined portion of the base material W by ejecting the hot melt adhesive H toward the substrate W being conveyed on the upper surface of the line A is the same as in a known hot melt adhesive application apparatus. The hot-melt adhesive discharged from the nozzle unit 1 is formed of a group of application nozzle holes 11 adjacent to each other at a small interval with a large number of application nozzle holes 11a. Dispensed as melt adhesive. Due to the pressurized air flow K discharged from the air nozzle holes 12a of the air nozzle hole group 12F adjacent to the application nozzle hole group 11 in front of the conveyance, a large number of thread-like or beat hot melt adhesives adjacent to each other are added to the front of the conveyance. A screen of compressed air flow is formed,
Similarly, by the pressurized air flow discharged from each air nozzle hole 12a of the air nozzle hole group 12R adjacent to the conveyance rear of the application nozzle hole group 11, the conveyance rear of a number of thread-like or beat hot melt adhesives adjacent to each other. Since the screen of the pressurized air flow is formed, a large number of thread-like or beaty hot melt adhesives are sandwiched from the front and rear sides of the conveyance and are prevented from spreading forward and rearward.

By contacting the pressurized air from the air nozzle hole 12a, the hot melt adhesive beat is elongated to become an elongated fibrous adhesive, but in this case, the spread to the front and rear of the conveyance is prevented. As a result, it spreads only in the left-right direction and comes into contact with each other to be integrated into a screen-like fibrous adhesive. Thus, the screen-like fiber-like adhesive is applied vertically to the substrate on the upper surface of the adhesive application line, and the application surface of the substrate W has a substantially uniform application thickness and an extremely thin adhesive. Is formed. The application pattern (application position, application length) of the application surface of the base material W in the transport direction is arbitrarily set by controlling the operation of the adhesive supply control valve 2. In practicing the second invention of the present application, a mask plate 5 having a mask window 5a is installed in the nozzle unit 1 as shown in FIG. In FIG. 4A, the mask plate 5 is inserted in the horizontal direction, and in FIG. 4B, the mask plate 5 is inserted in the vertical direction. Further, as shown in FIG. 4C, in the nozzle unit 1 according to the fourth embodiment of the present invention described later, the mask plate 5 is provided only on the second block 1R side.
(That is, the configuration in which the mask plate 5 on the first block 1F side is omitted) can also achieve the object of the second invention.
In this case, the contact position of the pressurized air with respect to the hot melt adhesive beat from the application nozzle hole group 11 is kept the same on both sides of the application nozzle hole group 11, and the flowing direction of the elongated fibrous adhesive is maintained in the vertical direction. In order to do so, the length of the first block 1F or the coating nozzle hole plate 1A in the base material transport direction is changed instead of the shim function (interval adjustment) by the mask plate 5 on the first block 1F side in the embodiment of the fourth invention. By increasing the length of the mask plate 5 by the thickness, the distance between the application nozzle hole group 11 and the air nozzle hole group 12F of the first block 1F, the application nozzle hole group 11 and the air nozzle hole group 12R of the second block 1R, Are kept the same, and the air nozzle hole group 1 of the first block 1F is set with reference to the opening of the application nozzle hole 11.
Lower end of 2F and air nozzle hole group 12R of second block 1R
Is symmetrically arranged with the lower end of.

As shown in FIG. 6, only a part of the coating nozzle hole 11a is communicated with the adhesive supply control valve 2 by the mask window 5a, so that the coating surface of the base material W is coated in the lateral direction (transport orthogonal direction). Pattern (application position, application width) is mask plate 5
Arbitrarily set by selecting the mask window 5a. The third invention of the present application is directed to a nozzle unit 1 according to the embodiment of the first invention.
Is used as the nozzle unit 1 in which the mask plate 5 is provided as in the above-described embodiment of the second invention, so that the application pattern of the application surface of the achieved base material W can be controlled by controlling the operation of the adhesive supply control valve 2 and the mask plate 5. By selecting the mask window 5a, the longitudinal direction (transport direction) and the lateral direction (transport orthogonal direction) of the application surface can be freely selected.

Next, the fourth invention of the present application will be described with reference to FIGS. The nozzle unit 1 includes a coating nozzle hole plate 1A, a first block 1F and a second block 1R that are arranged on both sides of the coating nozzle hole plate 1A so as to face each other.
A mask plate 5 having the same thickness as that of the coating nozzle hole plate 1A and the first block 1F and the same thickness between the coating nozzle hole plate 1A and the second block 1R is provided. The above components are integrated by a bolt 19 screwed into the screw hole 18 of the first block 1F. The coating nozzle hole plate 1 has a large number of coating nozzle holes 1 in the vertical direction from its intermediate position.
A coating nozzle hole group 11 made of 1a is formed, a coating nozzle hole 11a is opened on the bottom surface thereof, and a horizontal hole 15 extending from the upper end of the coating nozzle hole 11a to the side surface on the second block 1R side is formed in each coating nozzle hole. 11a, a large number of lateral holes 15 are opened in the side surface on the second block 1R side. In the embodiment, the coating nozzle hole 11a has a diameter of 0.5
mm and the interval between them was 1 mm.

In the first block 1F, a group 1 of coating nozzle holes is provided.
An air nozzle hole group 12F composed of a number of air nozzle holes 12a equal to one is formed, and the lower half of the air nozzle holes 12a is inclined toward the application nozzle hole plate 1A.
The lower end of “a” is located near the opening of the coating nozzle hole 11a on the bottom surface of the coating nozzle hole plate 1A, and is opened on the bottom surface of the first block 1F. In addition, each air nozzle hole 12
The upper end of “a” is open to the horizontal pressurized air hole 13 and communicates with the common pressurized air source 4. The second block 1R is
Similarly to the first block 1F, the air nozzle hole group 1 including the same number of air nozzle holes 12a as the application nozzle holes 11a.
2, the lower half of the air nozzle hole 12a is inclined in the direction of the coating nozzle hole plate 1A, and the lower end of the air nozzle hole 12a opening on the bottom surface is formed with the coating nozzle hole 11a on the bottom surface of the coating nozzle hole plate 1A. Of the application nozzle hole 1
It is symmetrically arranged with respect to the lower end of the air nozzle hole 12a of the first block 1F with reference to the opening of 1a. In addition, the upper end of each air nozzle hole 12a is opened to the horizontal pressurized air hole 13 and communicates with the common pressurized air source 4.
Further, a lateral groove 16 is formed at a position facing the openings of the large number of lateral holes 15 of the coating nozzle hole plate, and a hot melt adhesive supply hole 17 communicating with the lateral groove 16 is formed. The hot melt adhesive supply hole 17 communicates with the hot melt adhesive supply source 3 via the adhesive supply control valve 2. In the example,
Air nozzle holes 12a have a diameter of 0.5 mm and a mutual interval of 1 m
m, it was the same as the application nozzle hole 11a.

Referring to FIG. 8, the mask plate 5 is selectively provided between the coating nozzle hole plate 1A and the first block 1F and between the coating nozzle hole plate 1A and the second block 1R. Interposed freely, and at least two sheets of the same thickness. The mask plate 5 is manufactured by mirror finishing a stainless steel plate, an aluminum plate, a steel plate, an iron plate, or the like, which is a general material for shims. In the examples, the thickness was 0.3 mm. Each mask plate 5 has a shape (width direction position) of a mask window 5a in order to make a blocking range different between the openings of the many horizontal holes 15 of the application nozzle hole plate 1A and the horizontal grooves 16 of the second block 1R. , Width direction length), the application pattern (application position, application width) in the lateral direction (transport orthogonal direction) of the application surface of the substrate W
Set. That is, a large number of mask plates 5 having mask windows 5a corresponding to a desired coating pattern are prepared, and the mask plate 5 inserted between the coating nozzle hole plate 1A and the second block 1R corresponds to the coating pattern. Select and use as needed.

Therefore, when it is desired to change the coating pattern, as in the second invention, by interposing the mask plate 5 or replacing the mask window 5a with a different mask plate 5, the coating nozzle hole plate 1A is formed. The application range is changed by selectively blocking part of the openings of the many horizontal holes 15 with the horizontal grooves 16 of the second block 1R (see FIG. 6). The mask plate 5 inserted between the coating nozzle hole plate 1A and the first block 1F.
Means that the mask function (communication blocking function) for the application nozzle hole 11a is unnecessary and the application nozzle hole group 11 and the first block 1F
Since it functions as a shim plate for setting the interval with the air nozzle hole group 12, it is sufficient to insert the mask plate 5 without a window and function as a shim plate.
Any mask window 5a having the same thickness can be used.

The number of mask plates 5 to be used is not limited to two (one each on both sides of the coating nozzle hole plate 1A), and two or more mask plates may be inserted as long as they are the same on the left and right sides. . In this case, the mask plate 5 is caused to function as a shim, and the distance between the application nozzle hole group 11 and the air nozzle hole group 12F of the first block 1F and the application nozzle hole group 11 and the second
By functioning as a shim plate for setting the interval between the air nozzle hole group 12R of the block 1R, the distance between the application nozzle hole group 11 and the air nozzle hole groups 12F and 12R is the same on both sides of the application nozzle hole group 11. The contact position of the pressurized air with respect to the hot melt adhesive beat from the group of application nozzle holes 11 can be changed while maintaining the same position on both sides of the group of application nozzle holes 11. In addition,
Even when the mask plate 5 is interposed, the lower end of the air nozzle hole group 12F of the first block 1F and the lower end of the air nozzle hole group 12R of the second block 1R are maintained symmetrically with respect to the opening of the application nozzle hole 11. Therefore, the flowing direction of the elongated fiber adhesive is constant (substantially vertical) and does not change.

[0016]

According to the present invention, a hot melt adhesive beat is brought into contact with pressurized air from an air nozzle and drawn to form a long and thin fibrous adhesive on the base material on the upper surface of the adhesive application line. In forming an extremely thin coating surface by coating, a large number of elongated fiber-like adhesives from the coating nozzle hole group are screened by adjoining a screen-like pressurized air flow from the air nozzle hole group from before and after. By being applied to the base material in a shape, an extremely thin adhesive application surface can be formed with a uniform application thickness. Therefore, it is particularly effective for application to a sheet surface of a product where the quality of the product is degraded due to a slight application amount of the hot melt adhesive. Furthermore,
According to the first aspect of the present invention, the coating pattern in the longitudinal direction (transport direction) of the coating surface can be freely selected. According to the second aspect of the present invention, it is possible to freely select an application pattern in a lateral direction (transport orthogonal direction) of the application surface. According to the third aspect of the present invention, an application pattern in a longitudinal direction (transport direction) and an application pattern in a lateral direction (a direction perpendicular to the withdrawal direction) of the application surface can be freely selected. According to the fourth invention of the present application, the interposition of the mask plate allows the communication between the application nozzle hole group and the adhesive supply control valve 2 to be selectively cut off partially so that the application range in the width direction of the base material can be selected. In addition, the screen-like fiber adhesive can be supplied and applied vertically to the application surface, and a more uniform application surface can be obtained.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of a hot melt adhesive application device showing an embodiment of the first invention of the present application.

FIG. 2 is a bottom view of the nozzle unit.

FIG. 3 is a schematic diagram illustrating various examples of application nozzle holes and air nozzle holes.

FIG. 4 is a longitudinal sectional view of a nozzle unit showing various embodiments of the second invention of the present application.

FIG. 5 shows various embodiments of a mask plate, FIG.
In each of FIGS. And c, the upper part is a plan view, and the lower part is a longitudinal sectional view.

FIG. 6 shows windows of a mask plate corresponding to various widthwise application patterns, wherein the upper surface of each of FIGS. A, b and c is a plan view of the mask plate, and the lower stage shows a hot melt adhesive applied state. FIG.

FIG. 7 is a longitudinal sectional view of a hot-melt-adhesive-applying device showing an embodiment of the fourth invention of the present application.

FIG. 8 is a longitudinal sectional view of a main part of the nozzle unit in a state where a mask plate is interposed.

9 is a cross-sectional view of the nozzle unit showing the operation of the mask plate. FIG. 9A is the nozzle unit in FIG.
Respectively correspond to the nozzle units.

FIG. 10 is an explanatory diagram showing an application state according to a known spiral spray pattern.

[Explanation of symbols]

 A adhesive application line B adhesive application nozzle device H hot melt adhesive W base material 1 nozzle unit 2 adhesive supply control valve 3 hot melt adhesive supply source 4 pressurized air source 5 mask plate 5a cask window 11 application nozzle hole Group 12 Air nozzle hole group

Claims (4)

(57) [Claims] 1. A hot melt adhesive, which is made into an elongated fiber state by bringing compressed air from an air nozzle hole into contact with a hot melt adhesive beat discharged from an application nozzle hole of an adhesive application nozzle device and stretching it. In a hot melt adhesive coating apparatus that applies the coating liquid to the base material on the upper surface of the adhesive coating line, a number of coating nozzle holes are arranged in a direction intersecting with the conveying direction of the base material of the coating line to form a coating nozzle hole group, Forming a plurality of air nozzle holes on the front side and the rear side of the substrate in the application nozzle hole group in a direction parallel to the application nozzle hole group so as to approach the application nozzle hole group; A large number of application nozzle holes in the nozzle hole group are connected to an adhesive supply source via an adhesive supply control valve, and the hot melt adhesive in the form of an elongated fiber is screened between the base material on the upper surface of the application line. Hot melt adhesive application device, characterized in that to the coating. 2. A hot melt adhesive, which is formed into an elongated fiber state by bringing compressed air from an air nozzle hole into contact with a hot melt adhesive beat discharged from an application nozzle hole of an adhesive application nozzle device and stretching it. In a hot melt adhesive coating device that applies a coating onto the base material on the top of the adhesive coating line, a number of coating nozzle holes are arranged in the direction intersecting the transport direction of the base material in the coating line to form a group of coating nozzle holes An air nozzle hole group formed of a large number of air nozzle holes on the transfer front side and the transfer rear side of the substrate of the application nozzle hole group is formed in parallel with the application nozzle hole group close to the application nozzle hole group, The coating range can be selected by blocking some of the coating nozzle holes in the coating nozzle hole group with a mask plate, and the hot melt adhesive in the form of elongated fibers is applied in a screen form. Hot melt adhesive coating apparatus and selects freely coated substrate width direction of the coating pattern on the substrate of the upper surface of the ins. 3. A hot melt adhesive, which is brought into contact with a hot melt adhesive beat discharged from an application nozzle hole of an adhesive application nozzle device by applying pressurized air from an air nozzle hole to be elongated into a fiber state. In a hot melt adhesive coating device that applies a coating onto the base material on the top of the adhesive coating line, a number of coating nozzle holes are arranged in the direction intersecting the transport direction of the base material in the coating line to form a group of coating nozzle holes An air nozzle hole group formed of a large number of air nozzle holes on the transfer front side and the transfer rear side of the substrate of the application nozzle hole group is formed in parallel with the application nozzle hole group close to the application nozzle hole group, A large number of coating nozzle holes in the coating nozzle hole group are connected to an adhesive supply source via an adhesive supply control valve, and a part of the coating nozzle holes in the coating nozzle hole group is communicated and blocked by a mask plate. Paint The range is selectable, and the hot melt adhesive in the form of a long and thin fiber is applied to the base material on the top surface of the application line in a screen shape in a selectable pattern in the base material width direction and in the base material conveyance direction. Hot melt adhesive coating device. 4. A hot melt adhesive, which is formed into an elongated fiber state by bringing compressed air from an air nozzle hole into contact with a hot melt adhesive beat discharged from an application nozzle hole of an adhesive application nozzle device and stretching the same. A hot melt adhesive coating apparatus for applying a coating nozzle to a base material on an upper surface of an adhesive coating line. Forming a group of holes, an application nozzle hole plate having a plurality of lateral holes each communicating with the application nozzle hole opened on one side thereof, and a number of holes arranged on one side of the application nozzle hole plate and opening on the lower surface thereof. The air nozzle holes are arranged in the same direction as the coating nozzle hole group of the coating nozzle hole plate to form an air nozzle hole group, and a pressurized air hole for supplying pressurized air to the air nozzle hole through a pressurized air source is provided. A first block to be disposed on the other side of the coating nozzle hole plate, and a plurality of air nozzle holes that are opened on the lower surface thereof are arranged in the same direction as the coating nozzle hole group of the coating nozzle hole plate to form the air nozzle hole group. Forming a pressurized air hole for supplying pressurized air to the air nozzle hole through a pressurized air source, a lateral groove opposed to a plurality of lateral holes of the coating nozzle hole plate, and hot melt bonding; A second block having a hot melt adhesive supply hole for supplying a hot melt adhesive to the lateral groove through an agent supply source, between the coating nozzle hole plate and the first block, and between the coating nozzle hole plate and the second block. At least two mask plates of the same thickness having a mask window for allowing only the application nozzle holes corresponding to the desired application pattern to communicate with each other, and a hot melt adhesive supply hole And adhesive supply An adhesive supply control valve interposed between the substrate and the source, the intermittent application by the operation control of the adhesive supply control valve allows the coating pattern in the substrate transport direction to be freely selectable, The coating pattern in the width direction of the base material can be selected by selecting the mask window of the mask plate interposed between the two horizontal grooves, and the hot melt adhesive in the form of an elongated fiber is screened and the base material on the top surface of the coating line is applied. A hot-melt adhesive coating device characterized in that it is applied to a hot melt adhesive.