JP6387923B2 - Adhesive application method and adhesive application device - Google Patents

Description

  The present invention relates to an adhesive application method and an adhesive application apparatus.

  In recent years, in the fields of the automobile industry and the advanced electronics industry, the demand for batteries for automobiles and batteries for electronic devices is increasing, and in particular, there is a demand for miniaturization, thinning, and high capacity. Among these, nonaqueous electrolyte secondary batteries that have a higher energy density than other batteries have attracted attention. In particular, lithium ion secondary batteries are suitably used for electric vehicles because of their high energy density and high durability against repeated charge and discharge.

  The manufacturing process of the lithium ion secondary battery includes a module process in which battery cells constituting the lithium ion secondary battery are stacked and packed in a case. In this module process, there is a process of disposing a resin sheet coated with a hot melt adhesive between the battery cells and between the battery cells and the case in order to prevent displacement. As a method for applying the hot melt adhesive, there is known a method in which pressurized air is applied to discharge the hot melt adhesive in a thread shape and apply it onto a sheet.

  Thus, when apply | coating a hot-melt-adhesive, a hot-melt-adhesive may fly out of the application range which should be apply | coated. This phenomenon can occur remarkably at the start of coating.

  The scattering of the adhesive occurs due to rebound when the hot melt adhesive reaches the substrate at the start of application. When the hot melt adhesive adheres outside the application range as described above, for example, the base material as a sheet to which the adhesive is applied during conveyance may adhere to the equipment and cause conveyance abnormality. Therefore, it is necessary to prevent the hot melt adhesive from scattering outside the application range.

  In relation to this, for example, Patent Document 1 below discloses a method of applying an adhesive in a state where a rectangular cylindrical air curtain is formed and a predetermined region is covered. According to this method, since the predetermined area is covered by the rectangular cylindrical air curtain, it is possible to prevent the hot melt adhesive from scattering outside the application range.

JP 2012-71249 A

  However, in the application method described in Patent Document 1, air turbulence occurs in the application region where the adhesive is applied due to rebound when the formed air curtain is sprayed onto the substrate. And when an adhesive agent is applied in a state where such air turbulence occurs, there is a possibility that the adhesive agent cannot be uniformly applied to the substrate.

  The present invention has been made to solve the above-described problems, and prevents the adhesive from scattering outside the application range, and can apply the adhesive uniformly to the surface of the substrate. An object is to provide a coating method and an adhesive coating apparatus.

  The adhesive application method according to the present invention that achieves the above object applies an adhesive to a substrate that moves relative to a head that discharges the adhesive from a discharge hole into a thread shape by applying pressurized air. This is an adhesive application method. In the adhesive application method, prior to the start of the discharge of the adhesive, the front air curtain is formed by injecting air to a position on the front side in the movement direction of the base material with respect to the discharge hole of the head. And in the state where the air curtain is formed, the adhesive is discharged from the head toward the base material, and the front air curtain is formed immediately after the adhesive reaches the base material. Stop air injection.

  In addition, the adhesive application device according to the present invention that achieves the above object has a head that discharges adhesive in a thread form from a discharge hole on a relatively moving substrate by applying pressurized air. In addition, the adhesive application device is located on the front side in the movement direction of the base material with respect to the discharge hole of the head, and forms a front air curtain that jets air to the base material. Have The adhesive application device includes a control unit that controls operations of the head and the front air curtain forming unit. The control unit forms a front air curtain prior to the start of discharge of the adhesive, and discharges the adhesive from the head toward the base material in a state where the air curtain is formed. And a control part stops the injection of the said air which forms the said front air curtain immediately after the said adhesive agent reaches | attains the said base material.

  According to the above-described adhesive application method and adhesive application device, the adhesive is discharged from the head toward the base material in a state where the front air curtain is formed, so that the adhesive reaches the base material. For this reason, it is possible to prevent the adhesive from scattering outside the application range at the start of application. Also, immediately after the adhesive reaches the substrate, the injection of air forming the front air curtain is stopped. For this reason, the front air curtain is not formed during the application of the adhesive, and air turbulence does not occur in the application area where the adhesive is applied. Therefore, an adhesive agent can be uniformly apply | coated to the surface of a base material. Therefore, it is possible to provide an adhesive application method and an adhesive application device capable of preventing the adhesive from scattering outside the application range and uniformly applying the adhesive to the surface of the substrate.

It is a perspective view which shows a battery module. It is a perspective view which shows the cell unit which shows the inside of the case of a battery module. FIG. 3 is a schematic cross-sectional view taken along line 3-3 in FIG. 1 and shows a state in which sheets are arranged between battery cells and between battery cells and a case. It is a perspective view which shows the adhesive agent coating device which concerns on embodiment of this invention. It is a front view which shows an adhesive agent coating apparatus. It is the figure which looked at the head from the sheet | seat side. It is a schematic sectional drawing which shows a head. It is a figure which shows the front air injection hole of a front air curtain formation part, or the back air injection hole of a back air curtain formation part. It is a flowchart which shows the adhesive agent coating method which concerns on embodiment of this invention. It is a time chart which shows operation | movement of each part of an adhesive agent coating apparatus. It is a figure which shows the mode at the time of an application | coating start. It is a figure which shows the mode at the time of completion | finish of application | coating. It is a front view which shows the adhesive agent coating device which concerns on the modification.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The dimensional ratios in the drawings are exaggerated for convenience of explanation, and may differ from actual ratios.

  FIG. 1 is a perspective view showing the battery module 1.

  As shown in FIG. 1, the battery module 1 includes a case 110, and an external output negative terminal 121 and an external output positive terminal 122 drawn from the case 110.

  The case 110 has a lower case 112 having a substantially rectangular box shape and an upper case 114 forming a lid. Lower case 112 and upper case 114 are formed of a relatively thin steel plate or aluminum plate. The lower case 112 and the upper case 114 have through-holes 116 arranged at four corners. The through hole 116 is aligned with a through hole provided in a cell unit accommodated in the case 110 and is used for inserting a fastening component (not shown).

  The external output negative terminal 121 is connected to the negative tab of the cell unit in the case 110. The external output positive terminal 122 is connected to the positive tab of the cell unit in the case 110.

  FIG. 2 is a perspective view showing the cell unit 130 inside the case 110 of the battery module 1. 3 is a schematic cross-sectional view taken along line 3-3 in FIG. 1, and shows a state in which the sheet 150 is arranged between the battery cells 100 and between the battery cell 100 and the case 110. In FIG. 3, the battery cell 100 is shown in a simplified manner for easy understanding. Moreover, since a well-known thing can be used as the battery cell 100, detailed description inside is abbreviate | omitted.

  As shown in FIG. 2, the cell unit 130 includes a plurality of battery cells 100 and spacers 140 and 142 that support the plurality of battery cells 100.

  The plurality of battery cells 100 are each formed in a flat shape, stacked, and electrically connected to each other in series or in parallel. Although this embodiment demonstrates the case where the cell unit 130 contains the four battery cells 100A-100D, it is not limited to this. The cell unit 130 may include more or fewer battery cells 100.

  As shown in FIG. 3, a sheet 150 is disposed between the battery cells 100 </ b> A to 100 </ b> D and between the battery cell 100 and the case 110. The sheet 150 is, for example, a resin made of polypropylene, but is not particularly limited.

  An adhesive is applied to the surface of the sheet 150 using an adhesive application device described later. Thus, by sandwiching the sheet 150 coated with the adhesive between the battery cells 100A to 100D and between the battery cell 100 and the case 110, the battery cell 100A to 100D, and between the battery cell 100 and the case 110. Can be prevented from being displaced.

  As the adhesive, a hot melt adhesive can be used, but is not limited thereto. That is, any adhesive that exhibits appropriate thermoplasticity, can be melted by heating, and can be applied in a fluid state can be used as the adhesive.

  The spacers 140 and 142 support the stacked battery cells 100 from both ends, and maintain the stacking interval of the battery cells 100. The spacers 140 and 142 are made of an electrically insulating resin material. The spacers 140 and 142 have through holes 146 at positions corresponding to the four corners of the case 110. As described above, the through hole 146 is aligned with the through hole 116 of the lower case 112 and the upper case 114, and is used for inserting fastening parts.

  The battery module 1 can be used alone. For example, a plurality of battery modules 1 are further serialized and / or paralleled to form an assembled battery corresponding to a desired current, voltage, and capacity. can do.

  Hereinafter, the configuration of the adhesive application device 10 that applies an adhesive to the sheet 150 will be described with reference to FIGS. 4 to 8. FIG. 4 is a perspective view showing the adhesive application device 10 according to the embodiment of the present invention. FIG. 5 is a front view showing the adhesive application device 10. FIG. 6 is a view of the head 30 as viewed from the sheet 150 side. FIG. 7 is a schematic cross-sectional view showing the head 30. FIG. 8 is a view showing the front air injection hole 44 of the front air curtain forming part 40 or the rear air injection hole 54 of the rear air curtain forming part 50.

  As illustrated in FIGS. 4 and 5, the adhesive application device 10 includes a conveyance unit 20 that conveys the sheet 150 and a head 30 that ejects the adhesive B toward the sheet 150. The adhesive application device 10 further includes a front air curtain forming unit 40 positioned on the front side in the movement direction of the sheet 150 with respect to the adhesive discharge hole 31 (corresponding to the discharge hole) of the head 30, and a rear in the movement direction. And a rear air curtain forming portion 50 located on the side. In addition, the adhesive application device 10 includes a control unit 60 that controls various operations.

  The conveyance unit 20 conveys the sheet 150 as illustrated in FIGS. The conveyance direction for conveying the sheet 150 is downward right in FIG. 4 and rightward in FIG. The conveyance unit 20 conveys the sheet 150 by, for example, roller conveyance, but the conveyance method is not particularly limited.

  As shown in FIGS. 4 and 5, the head 30 is provided to face one side 150 </ b> S of the sheet 150. The head 30 is fixed at a predetermined position in the moving direction of the sheet 150. The fixing method is not particularly limited.

  As shown in FIGS. 6 and 7, the head 30 applies an adhesive B from the adhesive discharge hole 31 by applying pressurized air to the adhesive discharge hole 31 for discharging the adhesive B and the adhesive discharge hole 31. And a pump 33 for discharging. Further, the head 30 has air discharge holes 32 for determining the application pattern of the adhesive B by discharging air.

  As shown in FIG. 6, four adhesive discharge holes 31 are provided along the width direction of the sheet 150 (direction orthogonal to the moving direction). Note that the number of the adhesive discharge holes 31 is not limited to four.

  As shown in FIG. 7, the adhesive discharge hole 31 communicates with a flow path 31 </ b> F, and the adhesive B is pumped to the flow path 31 </ b> F by a pump 33. By applying the pressurized air in this way, the adhesive B is discharged from the adhesive discharge hole 31 toward the sheet 150 in the form of a thread.

  As shown in FIG. 6, four air discharge holes 32 are provided for each of the four adhesive discharge holes 31. The four air discharge holes 32 are arranged in a square lattice so that the adhesive discharge hole 31 is arranged in the center. The four air discharge holes 32 discharge air in a clockwise direction when viewed from the sheet 150 side (see arrows in FIG. 6). The number of air discharge holes 32 is not limited to four.

  Further, as shown in FIG. 7, the air discharge hole 32 is formed to be inclined with respect to the adhesive discharge hole 31 so as to have an inclination angle α.

  According to the head 30 configured as described above, the adhesive B is applied to the sheet 150 in a spiral pattern as shown in FIGS. 4, 5, and 7. The configuration of the air discharge holes 32 of the head 30 is not limited to the above-described configuration, and the adhesive B can be applied onto the sheet 150 with an arbitrary application pattern.

  As shown in FIGS. 4 and 5, the front air curtain forming portion 40 is provided to face one side 150 </ b> S of the sheet 150. The front air curtain forming unit 40 is fixed at a predetermined position in the moving direction of the sheet 150.

  As shown in FIG. 5, the front air curtain forming portion 40 includes a front main body portion 41, a front electromagnetic valve 42, and a front compressor 43.

  The front main body 41 has four front air injection holes 44 corresponding to the four adhesive discharge holes 31, as shown in FIG.

  Pumped air from the front compressor 43 is supplied to the front main body 41 via the front solenoid valve 42, and air is injected from the four front air injection holes 44. Thus, the front air curtain forming unit 40 forms the front air curtain FC as shown in FIG. The front air curtain FC is formed so as to inject air toward the application part 150 </ b> P where the adhesive B is applied to the sheet 150. The controller 60 controls on / off of the front air curtain FC by controlling on / off of the front solenoid valve 42.

  By disposing the front air curtain forming portion 40 in this way, it is preferable that the adhesive B is scattered out of the application range due to the rebound when the adhesive B reaches the sheet 150 at the start of application of the adhesive B. Can be prevented. Further, as shown in FIG. 5, the front air curtain forming unit 40 injects air downwardly to the left, so that the flow of the injected air can be directed to the rear side in the moving direction that is the application range. The scattering of the adhesive B outside the range can be suitably prevented.

  As shown in FIGS. 4 and 5, the rear air curtain forming unit 50 is provided to face one side 150 </ b> S of the sheet 150. The rear air curtain forming unit 50 is fixed at a predetermined position in the moving direction of the sheet 150.

  As shown in FIG. 5, the rear air curtain forming unit 50 includes a rear main body 51, a rear electromagnetic valve 52, and a rear compressor 53.

  The rear main body 51 has four rear air injection holes 54 corresponding to the four adhesive discharge holes 31 as shown in FIG.

  Pumped air from the rear compressor 53 is supplied to the rear main body 51 via the rear solenoid valve 52, and air is injected from the four rear air injection holes 54. Thereby, the rear air curtain forming unit 50 forms the rear air curtain BC as shown in FIG. The controller 60 controls on / off of the rear air curtain BC by controlling on / off of the rear solenoid valve 52.

  As shown in FIG. 5, the rear air injection hole 54 of the rear air curtain forming unit 50 is disposed below the adhesive discharge hole 31 of the head 30 in the vertical direction.

  The rear air curtain BC is formed by injecting air so as to cut the adhesive B discharged from the adhesive discharge hole 31 of the head 30. In other words, the rear air curtain BC is inclined 90 ° toward the head 30 side (rightward in FIG. 5) with respect to the vertically downward direction (the direction toward the sheet 150 in the orthogonal direction orthogonal to the surface direction of the sheet 150). It is formed so as to inject air.

  By arranging the rear air curtain forming portion 50 in this way, the thread-like adhesive B1 remaining between the adhesive discharge hole 31 and the sheet 150 at the end of application of the adhesive B is cut, and the adhesive is applied to the application range. B can fly (see FIG. 12). For this reason, scattering of the adhesive agent B outside the application range can be suitably prevented.

  The control unit 60 can be configured by, for example, a known microcomputer that includes a CPU, ROM, RAM, various interfaces, and the like. The control unit 60 controls various operations of the transport unit 20, the head 30, the front air curtain forming unit 40, and the rear air curtain forming unit 50.

  Next, an adhesive application method for applying the adhesive B to the sheet 150 will be described with reference to FIGS. FIG. 9 is a flowchart showing an adhesive application method according to an embodiment of the present invention. FIG. 10 is a time chart showing the operation of each part of the adhesive application device 10. FIG. 11 is a diagram illustrating a state when the application is disclosed. FIG. 12 is a diagram showing a state at the end of coating.

  In FIG. 10, the symbol a indicates the timing at which the leading edge 150 </ b> F in the moving direction of the sheet 150 reaches just below the adhesive discharge hole 31, and the symbol b indicates the application range of the sheet 150 where the adhesive B is applied. The timing at which the leading end in the moving direction reaches directly below the adhesive discharge hole 31 is shown. The symbol e indicates the timing at which the trailing end of the application range in which the adhesive B is applied in the sheet 150 reaches just below the adhesive discharge hole 31, and the symbol f indicates the movement direction of the sheet 150. The timing at which the rear end 150E reaches just below the adhesive discharge hole 31 is shown. The timing at which each part reaches directly below the adhesive discharge hole 31 can be detected by, for example, photographing the vicinity of the application range to which the adhesive B is applied with a camera. However, the present invention is not limited to this, and may be calculated from the conveyance speed of the sheet 150 or the like.

  First, the sheet 150 is set in the conveyance unit 20 (S01).

  Next, the sheet 150 is conveyed by the conveying unit 20 (S02).

  Next, the front air curtain FC is formed (S03). Specifically, the front air curtain forming unit 40 jets air toward the application unit 150P, thereby forming the front air curtain FC.

  The front air curtain FC starts to be formed, for example, when the front end 150F of the sheet 150 passes just below the adhesive discharge hole 31, as indicated by reference numeral a in FIG. The timing for starting the formation of the front air curtain FC is not particularly limited, but is determined in consideration of the stable formation of the front air curtain FC at the start of application of the adhesive B. The time for which the front air curtain FC is stably formed is determined by the following parameters (i) to (iv).

(I) Distance between adhesive discharge hole 31 and sheet 150 (ii) Flow velocity of air sprayed from front air curtain forming unit 40 (iii) After sending a signal for discharge to pump 33, bonding Time lag until the agent B is discharged (iv) Direction of jetting the front air curtain FC.

  Next, application of the adhesive B is started (S04). This timing is indicated by the symbol b in FIG. At this time, as described above, the front air curtain FC is stably formed. Therefore, as shown in FIG. 11, scattering of the adhesive B outside the application range due to rebound when the adhesive B reaches the sheet 150 at the start of application of the adhesive B can be suitably prevented.

  Further, as shown in FIG. 11, the front air curtain forming unit 40 injects the air in the lower left direction, whereby the flow after the injected air is irradiated onto the sheet is rearward in the moving direction that is the application range. Can be directed to the side. For this reason, scattering of the adhesive agent B outside the application range can be more suitably prevented.

  Next, the injection of air forming the front air curtain FC is stopped (S05). More specifically, as shown by reference sign c in FIG. 10, immediately after the adhesive B reaches the sheet 150, the injection of air that forms the front air curtain FC is stopped. The arrival timing of the adhesive B with respect to the sheet 150 is detected by, for example, a camera that captures the vicinity of the application range where the adhesive B is applied. Note that the arrival timing of the adhesive B with respect to the sheet 150 may be calculated from the distance between the adhesive discharge hole 31 and the sheet 150, the flow velocity of air sprayed from the front air curtain forming unit 40, and the like.

  Here, the term “immediately after the adhesive B reaches the sheet 150” refers to the time when the adhesive B reaches the sheet 150. Further, when the adhesive B is applied on the sheet 150, the end point is the timing until the effect of preventing air turbulence from being generated in the application region where the adhesive B is applied.

  The timing until an effect that does not cause air turbulence in the coating region can be exhibited is adjusted to an optimal timing as appropriate by repeating trial and error.

  Next, after applying the adhesive B in a predetermined range, the rear air curtain BC is formed (S06). Specifically, the rear air curtain forming part 50 forms the rear air curtain BC by injecting air so as to cut the adhesive B in the right direction in FIG.

  The rear air curtain BC is formed immediately before the discharge of the adhesive B is finished, as indicated by a symbol d in FIG.

  Here, “immediately before the end of discharging the adhesive B” starts from a timing at which the effect of preventing the occurrence of air turbulence in the application region during the application of the adhesive B onto the sheet 150 is started. This timing is appropriately adjusted to an optimal timing by repeating trial and error.

  Next, as shown by the symbol e in FIG. 10, the discharge of the adhesive B is finished (S07). With the completion of the discharge of the adhesive B, the thread-like adhesive B1 extends from the adhesive discharge hole 31 as shown in FIG. The thread-like adhesive B1 is curved forward in the movement direction along the flow accompanying the movement of the sheet 150. At this time, since the rear air curtain BC is formed, the thread-like adhesive B1 can be cut and the adhesive B can fly to the front side in the moving direction which is the application range. Therefore, scattering of the adhesive B outside the application range can be more suitably prevented.

  Next, the injection of air forming the rear air curtain BC is stopped (S08). More specifically, as indicated by a symbol f in FIG. 10, after the rear end 150E of the sheet 150 reaches just below the adhesive discharge hole 31, the injection of air that forms the rear air curtain BC is stopped. That is, since the rear air curtain BC is continuously formed until the rear end 150E of the sheet 150 passes just below the adhesive discharge hole 31, it is possible to prevent the adhesive B from being scattered on the transport unit 20. .

  As described above, according to the adhesive application method and the adhesive application device 10 according to the present embodiment, the adhesive B is discharged from the head 30 toward the sheet 150 in a state where the front air curtain FC is formed. For this reason, it is possible to prevent the adhesive B from being scattered outside the application range at the start of application. Moreover, immediately after the adhesive B reaches | attains the sheet | seat 150, the injection of the air which forms the front air curtain FC is stopped. For this reason, the front air curtain is not formed during the application of the adhesive B, and air turbulence does not occur in the application area where the adhesive B is applied. Therefore, the adhesive B can be uniformly applied to the surface of the sheet 150. Therefore, it is possible to prevent the adhesive B from scattering outside the application range, and to apply the adhesive B uniformly on the surface of the sheet 150.

  Further, the front air curtain FC is formed so as to inject air toward the application part 150 </ b> P where the adhesive B is applied to the sheet 150. For this reason, scattering of the adhesive B outside the application range due to rebounding when the adhesive B reaches the sheet 150 at the start of application of the adhesive B can be more suitably prevented.

  Further, immediately before the discharge of the adhesive B is terminated, the adhesive B discharged from the head 30 is cut at a position on the rear side in the moving direction of the sheet 150 with respect to the adhesive discharge hole 31 of the head 30. The rear air curtain BC is formed by injecting air into the rear air curtain BC. For this reason, the thread-like adhesive B1 remaining between the adhesive discharge hole 31 and the sheet 150 at the end of application of the adhesive B can be cut, and the adhesive B can fly to the application range. Therefore, scattering of the adhesive B outside the application range can be suitably prevented.

  Further, after the discharge of the adhesive B is finished, after the rear end 150E in the moving direction of the sheet 150 passes through the position corresponding to the adhesive discharge hole 31 of the head 30 in the vertical direction, the rear air curtain BC. Stop the injection of air to form. That is, since the rear air curtain BC is continuously formed until the rear end 150E of the sheet 150 passes just below the adhesive discharge hole 31, it is possible to prevent the adhesive B from being scattered on the transport unit 20. .

  Further, the rear air curtain BC is formed so as to inject air in a direction inclined by 90 ° toward the head 30 with respect to the downward direction in the vertical direction. For this reason, the thread-like adhesive B remaining between the adhesive discharge hole 31 and the sheet 150 at the end of the application of the adhesive B can be more suitably cut, and the adhesive B can fly to the application range. Therefore, scattering of the adhesive B outside the application range can be more suitably prevented.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims.

  For example, in the above-described embodiment, the adhesive application device 10 has the front air curtain forming part 40 and the rear air curtain forming part 50. However, the adhesive application device 10 may have a configuration in which the rear air curtain forming unit 50 is not provided and the front air curtain forming unit 40 is provided.

  In the above-described embodiment, the front air curtain FC formed by the front air curtain forming unit 40 injects air toward the application unit 150 </ b> P where the adhesive B is applied to the sheet 150. However, the air injection direction of the front air curtain forming unit 40 is not limited as long as air is injected onto the seat 150.

  Further, in the above-described embodiment, after the rear end 150E of the sheet 150 passes just below the head 30, the injection of air that forms the rear air curtain BC is stopped. However, the timing of stopping the injection of air forming the rear air curtain BC is not particularly limited as long as it is after the discharge of the adhesive B is finished.

  In the embodiment described above, the rear air curtain BC injects air in a direction inclined 90 ° toward the head 30 side with respect to the downward direction in the vertical direction (rightward in FIG. 5). However, as long as the air is jetted so as to cut the adhesive B discharged from the head 30, the inclination angle may be smaller than 90 ° as shown in FIG.

  In the above-described embodiment, the front compressor 43 and the rear compressor 53 are provided separately. However, the front compressor 43 and the rear compressor 53 may be configured to serve as one compressor.

  Further, in the above-described embodiment, the sheet 150 is moved in the conveyance direction while the head 30, the front air curtain forming unit 40, and the rear air curtain forming unit 50 are fixed. However, the head 30, the front air curtain forming unit 40, and the rear air curtain forming unit 50 may move while the seat 150 is fixed.

  Moreover, in embodiment mentioned above, although the sheet | seat 150 was mentioned as an example as an object to which the adhesive agent B is apply | coated, it is not specifically limited.

10 Adhesive application device,
30 heads,
31 Adhesive discharge hole (discharge hole),
40 Front air curtain forming part,
50 Rear air curtain forming part,
150 sheet (base material),
150F leading edge of sheet movement direction,
150E Rear end of sheet moving direction,
150P coating part,
B adhesive
FC front air curtain,
BC Rear air curtain.

Claims (10)

An adhesive application method for applying an adhesive to a substrate that moves relative to a head that discharges adhesive from a discharge hole in a thread shape by applying pressurized air,
Prior to the start of the discharge of the adhesive, the front air curtain is formed by injecting air to a position on the front side in the movement direction of the base material with respect to the discharge hole of the head,
In the state where the air curtain is formed, the adhesive is discharged from the head toward the base material,
Immediately after the adhesive reaches the substrate, the adhesive application method stops the air injection that forms the front air curtain.   The adhesive application method according to claim 1, wherein the front air curtain is formed such that the air is jetted toward an application portion where the adhesive is applied to the base material.   Immediately before finishing the discharge of the adhesive, air is used to cut the adhesive discharged from the head at a position on the rear side in the movement direction of the base material with respect to the discharge hole of the head. The adhesive coating method according to claim 1, wherein a rear air curtain is formed by spraying a slag.   After finishing the discharge of the adhesive, the rear end of the base in the moving direction has passed a position corresponding to the discharge hole of the head in the orthogonal direction orthogonal to the surface direction of the base. The adhesive application method according to claim 3, wherein the injection of the air that forms the rear air curtain is stopped later.   The rear air curtain is formed so as to inject the air in a direction inclined by 90 ° toward the head with respect to a direction toward the base material in an orthogonal direction orthogonal to a surface direction of the base material. 5. The adhesive application method according to 3 or 4. A head that discharges adhesive in a thread form from a discharge hole to a relatively moving substrate by applying pressurized air; and
A front air curtain forming portion that forms a front air curtain that is located on the front side in the movement direction of the base material and injects air onto the base material with respect to the ejection hole of the head;
A control unit for controlling the operation of the head and the front air curtain forming unit,
The controller is
Prior to the start of discharge of the adhesive, the front air curtain is formed,
In the state where the air curtain is formed, the adhesive is discharged from the head toward the base material,
Immediately after the adhesive reaches the base material, the adhesive application device stops the injection of the air forming the front air curtain.   The adhesive application according to claim 6, wherein the front air curtain forming part is arranged such that the front air curtain injects the air toward an application part where the adhesive is applied to the base material. apparatus. Rear air that forms a rear air curtain that is located on the rear side in the movement direction of the base material with respect to the ejection hole of the head and that ejects air so as to cut the adhesive ejected from the head. It further has a curtain forming part,
The control unit controls the rear air curtain forming unit,
The adhesive application device according to claim 6 or 7, wherein the rear air curtain is formed by the rear air curtain forming unit immediately before the discharge of the adhesive is finished. The control unit controls the rear air curtain forming unit,
After finishing the discharge of the adhesive, the rear end of the base in the moving direction has passed a position corresponding to the discharge hole of the head in the orthogonal direction orthogonal to the surface direction of the base. The adhesive application device according to claim 8, wherein the jet of air that forms the rear air curtain is stopped later.   The rear air curtain forming unit injects the air in a direction inclined 90 ° toward the head side with respect to a direction toward the base material in a direction orthogonal to the surface direction of the base material. The adhesive application device according to claim 8, wherein the adhesive application device is arranged.