Coating device and foam production method

Abstract

To provide a coating device capable of reducing liquid coating variation.SOLUTION: This coating applicator comprises: an arranging unit in which an object to be coated is disposed; and a coating head that moves to a plurality of predetermined positions relative to the arrangement unit. The coating head includes a first nozzle for spraying a liquid, a connection provided with the first nozzle, a projection that projects from the connection, and a second nozzle provided at the tip of the projection to spray the liquid. The axes of the second nozzle and the projection and the axis of the first nozzle incline in a direction for separation from each other.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an application device and a method for producing a foam. [Background technology]

[0002] Patent Document 1 discloses a technique for applying a liquid to an object to be coated, in which holes are provided in a roller or the like that compresses the object to be coated (a sheet pad) made of a foamed resin material, and liquid is supplied to the object to be coated through the holes at the same time as the object to be coated is compressed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-85021 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology of Patent Document 1, the liquid is supplied to the object to be coated at the same time as the object is compressed, so a roller or the like must be in contact with the entire surface to be coated with the liquid, but for objects to be coated that have complex shapes such as bag-shaped or recessed shapes, the roller or the like may not come into contact with the bag-shaped or recessed parts, resulting in uneven liquid application.Even if an operator manually applies liquid to the object to be coated using a single spray gun, there will be areas where the liquid is sufficiently applied and areas where the liquid is not sufficiently applied, particularly in bag-shaped or recessed parts, resulting in uneven liquid application.

[0005] The present invention has been made to solve this problem, and aims to provide an application device and a method for manufacturing foam that can reduce variation in the application of liquid even to objects with complex shapes such as bag-shaped or recessed shapes. [Means for solving the problem]

[0006] To achieve this object, the coating device of the present invention includes a placement section on which an object to be coated is placed, and a coating head section that moves to a plurality of predetermined positions relative to the placement section. The coating head section includes a first nozzle that sprays liquid, a connection section in which the first nozzle is provided, a protrusion that protrudes from the connection section, and a second nozzle that is provided at the tip of the protrusion and sprays liquid, and the axes of the second nozzle and the protrusion and the axis of the first nozzle are inclined in directions away from each other.

[0007] The method for producing a foam of the present invention includes a coating step in which a coating object is coated with a liquid using a coating device. The coating object has a front surface and a back surface opposite the front surface in the thickness direction. The back surface of the coating object has a base surface, an upright surface rising from the base surface, and an opposing surface connected to the upright surface and opposing a part of the base surface with a space therebetween. In the coating step, a first nozzle sprays the liquid onto at least the base surface, and a second nozzle sprays the liquid onto at least the upright surface and the opposing surface. [Effects of the Invention]

[0008] According to the applicator of claim 1, the axes of the second nozzle and the protrusion and the axis of the first nozzle are inclined in directions away from each other, so that the first nozzle or the second nozzle can be used to apply to areas of the object that cannot be applied by the other nozzle alone. This reduces areas where the liquid is not sufficiently applied, thereby reducing variations in the application of the liquid to the object.

[0009] According to the applicator of claim 2, in the applicator of claim 1, the length of the protruding portion is longer than the distance between the position where the first nozzle is attached to the connection portion and the tip of the first nozzle, so even if the object to be coated has a bag-like or recessed shape, the liquid can be easily applied to the inner part, and the number of areas where the liquid is not sufficiently applied can be reduced, thereby further reducing the variation in the application of the liquid to the object to be coated.

[0010] According to the coating device of claim 3, since the second nozzle and the protruding portion are thinner than the first nozzle in the coating device of claim 1 or 2, the second nozzle and the protruding portion can be inserted into narrow areas where the first nozzle cannot be inserted to apply the liquid, thereby reducing areas where the liquid is not sufficiently applied.

[0011] According to the coating device of claim 4, in the coating device of any one of claims 1 to 3, the particle diameter of the liquid sprayed from the second nozzle is smaller than the particle diameter of the liquid sprayed from the first nozzle, so the liquid sprayed from the second nozzle is more likely to be atomized than the liquid sprayed from the first nozzle.Since the liquid sprayed from the second nozzle can be sprayed farther, it is easier to apply the liquid to parts with recessed shapes.

[0012] According to the foam manufacturing method of claim 5, the axes of the second nozzle and the protrusion and the axis of the first nozzle are inclined in directions away from each other, so even if the object has an upright surface or an opposing surface that is difficult to coat with only the first nozzle, it becomes easier to coat the liquid on the upright surface, the opposing surface, and the base surface of the part opposing the opposing surface, and it is possible to reduce areas where the liquid is not sufficiently coated, thereby reducing variation in the coating of the liquid on the object.

[0013] According to the foam manufacturing method described in claim 6, in the foam manufacturing method described in claim 5, when liquid is sprayed onto the upright surface and the opposing surface, the tip of the second nozzle is positioned within the space facing the upright surface, making it difficult for the sprayed liquid to spread outside the space. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic diagram of a coating device according to an embodiment. [Figure 2] FIG. [Figure 3] 3(a) is a cross-sectional view of the object to be coated taken along line III-III in FIG. 2 when liquid is being coated using the first nozzle, and FIG. 3(b) is a cross-sectional view of the object to be coated taken along line III-III in FIG. 2 when liquid is being coated using the second nozzle. DETAILED DESCRIPTION OF THE INVENTION

[0015] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. An application device 10 according to one embodiment will be described with reference to Figure 1. Figure 1 is a schematic diagram of the application device 10 according to one embodiment. The application device 10 is a device that sprays and applies a liquid to an application target 30 (see Figure 2) placed in a placement section 20.

[0016] The coating device 10 is equipped with a platform-like placement unit 20 on which the object 30 to be coated is placed. In this embodiment, the placement unit 20 is platform-like, but it may be a unit that transports the object 30 to be coated thereon like a belt conveyor, or it may be a unit that grasps and fixes the object 30 to be coated. The object 30 to be coated is placed on the placement unit 20 with the surface to be coated with the liquid exposed.

[0017] The coating device 10 includes a robot 40. The robot 40 includes an arm 42 having multiple joints and a base 41 that supports the arm 42. A coating head unit 43 (end effector) is provided at the tip of the arm 42. The robot 40 is a six-axis robot that can move the coating head unit 43 relative to the placement unit 20 in a total of six axial directions: a height direction (vertical direction in FIG. 1), a horizontal direction (left and right direction in FIG. 1) perpendicular to the height direction, a vertical direction (perpendicular to the plane of FIG. 1) perpendicular to both the height direction and the horizontal direction, and directions of rotation around axes extending in the height direction, horizontal direction, and vertical direction. The coating head unit 43 moves to a plurality of predetermined positions relative to the placement unit 20.

[0018] The application head unit 43 includes a connection unit 44 that connects the arm 42 with the first nozzle 45 and the second nozzle 46. The first nozzle 45 and the second nozzle 46 are attached to the connection unit 44 directly or via another member by a mechanical method such as screwing. The axis of the second nozzle 46 is tilted at an angle θ1 relative to the axis of the first nozzle 45 and faces in a different direction. For example, the angle θ1 is 20° to 90°. In FIG. 1, piping for supplying air and liquid to the first nozzle 45 and the second nozzle 46 is not shown. The liquid from the first nozzle 45 and the second nozzle 46 is sprayed in a mist, and small liquid particles adhere to the application target 30 and are applied.

[0019] The application head unit 43 includes a protruding portion 50 protruding from the connecting portion 44. The protruding portion 50 includes the second nozzle 46 such that the tip 48 of the second nozzle 46 is located at the tip of the protruding portion 50. The length L2 of the protruding portion 50 is longer than the distance L1 between the position where the first nozzle 45 is attached to the connecting portion 44 and the tip 47 of the first nozzle 45. The length L2 of the protruding portion 50 is the distance between the base of the protruding portion 50 protruding from the connecting portion 44 and the tip 48 of the second nozzle 46. For example, the length L2 is 50 mm to 250 mm, and preferably 100 mm to 200 mm.

[0020] The thickness of the second nozzle 46 and the protrusion 50 is smaller than the thickness of the first nozzle 45. Therefore, when applying liquid, the second nozzle 46 and the protrusion 50 can be inserted into narrow areas that the first nozzle 45 cannot reach, thereby reducing areas where the liquid is not sufficiently applied.

[0021] The second nozzle 46 has a spray angle, which is the angle at which the sprayed liquid spreads, that is larger than the spray angle of the first nozzle 45. For example, the spray angle β of the second nozzle 46 (see FIG. 3(b)) is 40° to 160°, while the spray angle α of the first nozzle 45 (see FIG. 3(a)) is smaller than this. Therefore, the liquid sprayed from the second nozzle 46 can be applied over a wider area at one time than the liquid sprayed from the first nozzle 45.

[0022] It is preferable that the second nozzle 46 spray a larger amount of liquid per unit time than the first nozzle 45. In this case, even if the spray angle of the second nozzle 46 is larger than the spray angle of the first nozzle 45, the amount of liquid per unit area sprayed from the second nozzle 46 can be made closer to or larger than the amount of liquid per unit area sprayed from the first nozzle 45. This reduces the difference in the amount of liquid applied per unit time between the areas coated by the first nozzle 45 and the second nozzle 46, thereby reducing variation in the application of liquid to the coating target 30.

[0023] It is preferable that the size of the particles of the liquid sprayed from the second nozzle 46 be smaller than the size of the particles of the liquid sprayed from the first nozzle 45. When the size of the particles of the liquid sprayed from the second nozzle 46 is small, it is more likely to become mist-like than the liquid sprayed from the first nozzle 45. Therefore, the liquid sprayed from the second nozzle 46 can be sprayed farther, making it easier to apply the liquid to areas with recessed shapes.

[0024] In the present embodiment, the application head unit 43 is exemplified as having two nozzles, the first nozzle 45 and the second nozzle 46, attached to the connection portion 44, but is not limited to this. Three or more nozzles may be attached to the connection portion 44. In this case, the axes of the nozzles are offset from each other by a predetermined angle and point in different directions.

[0025] The coating device 10 is equipped with a recognition device 60 that acquires the shape of the object to be coated 30 placed on the placement unit 20 and position information of the object to be coated 30. The recognition device 60 is attached above the placement unit 20. The shape information of the object to be coated 30 acquired by the recognition device 60 is, for example, information from an image captured by a camera, and the recognition device 60 recognizes the shape by analyzing the image. The position information of the object to be coated 30 is the relative distance from a predetermined point on the placement unit 20 to a certain point on the object to be coated 30, and refers to the distance from the placement unit 20 in the height direction, the lateral direction perpendicular to the height direction, and the vertical direction perpendicular to both the height direction and the lateral direction.

[0026] As a means for the recognition device 60 to acquire information, a non-contact type such as a device that uses a laser or infrared rays, in addition to a device that takes an image with a camera, is preferably adopted. In the present embodiment, the recognition device 60 is provided separately from the application head unit 43 of the robot 40, but it may also be provided in the application head unit 43 of the robot 40. In this case, the recognition device 60 acquires the shape of the application target object 30 and the position information of the application target object 30 in association with the position information of the application head unit 43.

[0027] The coating device 10 includes a processing device 70 connected to a recognition device 60. The recognition device 60 transmits acquired information to the processing device 70. The processing device 70 identifies a coating object that matches the shape of the coating object 30 acquired from the recognition device 60 from among the shapes of multiple coating objects pre-recorded in the processing device 70. Based on the position information of the coating object 30 transmitted from the recognition device 60, the processing device 70 corrects the difference between the position information of the coating object 30 relative to the placement unit 20 and the position information pre-recorded in the processing device 70. Furthermore, the processing device 70 is connected to the robot 40, and based on the determined shape of the coating object 30, selects a pre-recorded coating program. Based on the corrected position information, the processing device 70 issues a movement command to the arm 42 and a spray command to the first nozzle 45 and the second nozzle 46.

[0028] Upon receiving a movement command from the processing device 70, the arm 42 moves the application head unit 43 to a plurality of predetermined positions relative to the placement unit 20. These plurality of positions are positions where, when the application target 30 is placed on the placement unit 20, the tip 47 of the first nozzle 45 and the tip 48 of the second nozzle 46 are directed toward predetermined portions of the application target 30 in order to apply liquid to the application target 30. These plurality of positions are set for each shape of the application target 30.

[0029] The application head unit 43 sprays the liquid while stopping at or moving to a plurality of predetermined positions relative to the placement unit 20. Furthermore, the liquid may be sprayed from the first nozzle 45 and the second nozzle 46 continuously or intermittently.

[0030] The timing and order of spraying the liquid from the first nozzle 45 and the second nozzle 46 are set appropriately depending on the shape and size of the coating target 30. Furthermore, the liquid may be sprayed from the first nozzle 45 and the second nozzle 46 simultaneously, separately from each nozzle, or a combination thereof.

[0031] A method for producing a foam by applying a liquid to an object to be coated 30 will be described with reference to Figures 2, 3(a), and 3(b). Figure 2 is a rear view of the object to be coated 30. Figure 3(a) is a cross-sectional view of the object to be coated 30 taken along line III-III when liquid is applied using a first nozzle 45, and Figure 3(b) is a cross-sectional view of the object to be coated 30 taken along line III-III when liquid is applied using a second nozzle 46. In Figures 2, 3(a), and 3(b), arrows UD, LR, and FB indicate the up-down direction, left-right direction, and front-rear direction of the object to be coated 30, respectively.

[0032] The object 30 is made of foamed synthetic resin and is, for example, a cushion used in soft urethane seat cushions, seat backs, headrests, armrests, and ottomans for vehicles, offices, and homes, instrument panels for vehicles, and hard urethane interior parts for doors. In this embodiment, the object 30 is exemplified by a cushion (seat pad) used in a seat back.

[0033] As shown in Figure 2, the object 30 to be coated has a main body portion 33 extending in the up-down direction, side portions 34, 34 connected to both left-right ends of the main body portion 33, and a bent portion 35 extending from above the main body portion 33 rearward (toward the front of the paper in Figure 2) and facing the main body portion 33 with a space in between. Like the bent portion 35, the side portion 34 extends rearward from both left-right ends of the main body portion 33 and has portions facing the main body portion 33 with a space in between. The side portions 34, 34 are connected at their upper parts to the respective left-right ends of the bent portion 35. The side portion 34 bulges out from the main body portion 33 forward (toward the back of the paper in Figure 2).

[0034] As shown in FIG. 3(a), the object 30 to be coated has a front surface 31 including the front surface of the main body 33 and the outward-facing surfaces of the side portions 34 and the folded portion 35, and a back surface 32 which is the surface opposite the front surface 31 in the thickness direction. The back surface 32 includes a base surface 36 which forms the rear surface of the main body 33, an upright surface 37 which rises rearward from the base surface 36, and an opposing surface 38 which is connected to the upright surface 37 and faces a part of the base surface 36 with a space 39 formed therebetween. The back surface 32 of the side portions 34, 34 and the folded portion 35 is composed of the upright surface 37 and the opposing surface 38. Of the back surface 32 of the object 30 to be coated, the upright surface 37, the opposing surface 38, and the base surface 36 in the portion facing the opposing surface 38 have a bag-like or recessed shape.

[0035] The opposing surface 38 facing a portion of the base surface 36 with a space therebetween does not necessarily mean that the opposing surface 38 and the portion of the base surface 36 are parallel to each other. The opposing surface 38 may be inclined at an angle θ2 with a space therebetween from the portion of the base surface 36. In this case, the angle θ2 of the opposing surface 38 with respect to the portion of the base surface 36 is 0°<θ2≦90°.

[0036] The object 30 to be coated is attached to a seat frame, seat pan, or the like of a vehicle, and then a cover is attached to the outer shape of the object 30 to be coated. A noise suppressing agent (liquid) is applied to the back surface 32 to prevent noise from being generated by rubbing against the seat frame or seat pan. Suitable noise suppressing agents include, for example, fluorine-based resins such as polytetrafluoroethylene and paraffin-based lubricants such as paraffin wax. In this embodiment, the liquid applied to the object 30 to be coated is a noise suppressing agent, but is not limited to this. Liquids such as adhesives, neutralizing agents, surface treatment agents, and rust inhibitors may be used as appropriate for the desired purpose.

[0037] A method for manufacturing a foamed body will now be described. The foamed body comprises an object to be coated 30 and a liquid applied to the object to be coated 30. First, a raw material liquid of a foamed synthetic resin material is foamed in a mold to form an object to be coated 30 (seat pad) made of foamed synthetic resin. The molded object to be coated 30 is removed from the mold, and a crushing process is carried out in which the object to be coated 30 is compressed using rollers or upper and lower molds, or the object to be coated 30 is placed under reduced pressure to crush the closed cells within the object to be coated 30 and suppress deformation of the object to be coated 30 due to temperature changes after foam molding. After the crushing process, the shape of the object to be coated 30 is restored by releasing the compression using rollers or restoring the reduced pressure.

[0038] Thereafter, as shown in Figures 3(a) and 3(b), a coating process is performed in which a liquid is applied to the coating object 30 using the coating device 10, thereby obtaining a foamed body in which the liquid has been applied to the coating object 30 made of foamed synthetic resin.

[0039] In the coating process, the object to be coated 30 is placed on the placement unit 20 with the back surface 32 exposed. Information on the shape of the object to be coated 30 placed on the placement unit 20 and information on the position of the object to be coated 30 relative to the placement unit 20 are acquired by a recognition device 60 attached above the placement unit 20 in the height direction. The recognition device 60 transmits the acquired information to a processing device 70.

[0040] The processing device 70 operates the arm 42 in response to a movement command from the processing device 70 based on the shape information of the object 30 to be coated acquired by the recognition device 60, the position information of the object 30 to be coated, the corresponding coating program, and the corrected position information, and moves the coating head unit 43 to a plurality of predetermined positions relative to the placement unit 20. The first nozzle 45 and the second nozzle 46 spray liquid in response to a spray command from the processing device 70.

[0041] As shown in FIG. 3(a), the base surface 36 other than the portion facing the opposing surface 38 is coated by spraying liquid from the first nozzle 45. At this time, the first nozzle 45 sprays the liquid toward the base surface 36 other than the portion facing the opposing surface 38, with the tip 47 of the first nozzle 45 directed toward it. Because the axis of the second nozzle 46 faces in a different direction from the axis of the first nozzle 45, even if the tip 47 of the first nozzle 45 is brought closer to the base surface 36, the tip 48 of the second nozzle 46, which is farther from the connecting portion 44, is less likely to interfere with the coating target 30 by the angle θ1 at which the axes are tilted relative to each other. Therefore, the tip 47 of the first nozzle 45 can be brought closer to the base surface 36 to spray the liquid with high precision.

[0042] 3(b), the upright surface 37, the opposing surface 38, and the portion of the base surface 36 opposing the opposing surface 38 are coated by spraying liquid from the second nozzle 46. At this time, the second nozzle 46 sprays the liquid with the tip 48 of the second nozzle 46 positioned within the space 39. The thickness of the second nozzle 46 and the protruding portion 50 is sufficiently small compared to the distance between the opposing surface 38 and the portion of the base surface 36 opposing the opposing surface 38. Therefore, the tip 48 of the second nozzle 46 and the protruding portion 50 can be positioned within the space 39 during coating.

[0043] At this time, the tip 48 of the second nozzle 46 is directed toward the upright surface 37. Because the tip 48 of the second nozzle 46, which has a larger spray angle than the first nozzle 45, is positioned within the space 39, the liquid can be sprayed and applied simultaneously to the upright surface 37, the opposing surface 38, and the portion of the base surface 36 opposing the opposing surface 38.

[0044] The axis of the second nozzle 46 passes through the center between the opposing surface 38 and the portion of the base surface 36 facing the opposing surface 38. Since the distances from the tip 48 of the second nozzle 46 to the opposing surface 38 and the portion of the base surface 36 facing the opposing surface 38 can be made approximately equal, when liquid is simultaneously sprayed onto the opposing surface 38 and the portion of the base surface 36 facing the opposing surface 38, variation in the application of liquid to the opposing surface 38 and the portion of the base surface 36 facing the opposing surface 38 can be reduced.

[0045] Furthermore, because the tip 48 of the second nozzle 46 is positioned within the space 39 to spray the liquid toward the upright surface 37, which has a small portion of the space 39 that is open to the outside, the sprayed liquid is less likely to spread outside the space 39, even when the liquid is sprayed from the second nozzle 46 at a spray angle greater than that of the first nozzle 45. This reduces the waste of the sprayed liquid.

[0046] In the application process, the recognition device 60, processing device 70, and robot 40 automatically perform all steps from placing the object 30 to the completion of applying the liquid to the object 30, thereby reducing labor.

[0047] The present invention has been described above based on the embodiments, but the present invention is not limited to these in any way, and it can be easily imagined that various improvements and modifications are possible within the scope of the present invention without departing from the spirit of the present invention.

[0048] In the embodiment, the robot 40 is described as a six-axis robot, but this is not necessarily limited to this. The robot 40 may be a gate-type loader or a robot with fewer or more movable axes than six. Even if the robot 40 has fewer movable axes than six, the axis of the second nozzle 46 faces in a direction different from the axis of the first nozzle 45 by the angle θ1, so that a portion of the coating target object 30 that cannot be coated with either the first nozzle 45 or the second nozzle 46 alone can be coated with the other nozzle.

[0049] In the embodiment, the case where the placement unit 20 does not move and the application head unit 43 moves to multiple predetermined positions relative to the placement unit 20 has been described, but this is not necessarily limited to this. The placement unit 20 may grasp the object to be coated 30 and move the object to be coated 30 along with the movement of the placement unit 20 within a range in which the recognition device 60 can acquire information and a range in which the application head unit 43 can move. In this case, both the placement unit 20 and the application head unit 43 may move, or only the placement unit 20 may move. In this case, the multiple predetermined positions relative to the placement unit 20 are multiple positions in which the relationship between the placement unit 20 and the application head unit 43 in the height direction, width direction, and length direction remains unchanged regardless of whether the placement unit 20 moves. Regardless of the position of the placement unit 20 after movement, the relative positional relationship between the placement unit 20 and the multiple predetermined positions to which the application head unit 43 moves remains unchanged. Therefore, the tip 47 of the first nozzle 45 and the tip 48 of the second nozzle 46 can be positioned at the same distance from the arrangement portion 20 and can be oriented in the same direction.

[0050] In the embodiment, the case where the second nozzle 46 is part of the protruding portion 50 has been described, but this is not necessarily limited to this. It is of course possible for the entire second nozzle 46 to be the protruding portion 50 protruding from the connecting portion 44 so that the tip 48 of the second nozzle 46 is at the tip of the protruding portion 50.

[0051] In the embodiment, the opposing surface 38 is inclined by the angle θ2 shown in FIG. 3(a), but this is not necessarily limited to this. As long as the tip of the opposing surface 38 opposite the side connected to the upright surface 37 is spaced apart from the base surface 36, the distance between the opposing surface 38 and the base surface 36 may increase from the tip of the opposing surface 38 opposite the side connected to the upright surface 37 toward the upright surface 37. In this case, the opposing surface 38 is inclined by an angle θ3 with respect to the base surface 36 from the tip of the opposing surface 38 opposite the side connected to the upright surface 37 toward the upright surface 37. In this case, the opposing surface 38 is inclined in the opposite direction from when the opposing surface 38 is inclined by the angle θ2. For example, the angle θ3 is 0°<θ3≦10°.

[0052] As long as the opposing surface 38 is spaced apart from the base surface 36, the opposing surface 38 may have a portion that is recessed rearward or a portion that bulges forward. The opposing surface 38 may also have a shape that bends so that the tip of the opposing surface 38 approaches or moves away from the base surface 36. In either case, it is preferable that the angle of the recessed, bulging, or bent portion of the opposing surface 38, which slopes from the upright surface 37 toward the tip of the opposing surface 38 so as to approach the base surface 36, with respect to the base surface 36, is 10° or less. [Explanation of symbols]

[0053] 10 Coating equipment 20 Placement section 30 Coating object 32 Back side 36 Base 37 Erection surface 38 Opposite Surface 39 Space 43 Application head 44 Connection 45 No. 1 nozzle 46 Second nozzle 50 Protrusion

Claims

1. An application device that applies a liquid to an application target, a placement unit in which the object to be coated is placed; a coating head unit that moves to a plurality of predetermined positions relative to the arrangement unit, The application head unit includes a first nozzle that sprays the liquid; a connection portion provided with the first nozzle; a protrusion protruding from the connection portion; a second nozzle provided at a tip of the protrusion and spraying the liquid; An application device in which the axes of the second nozzle and the protrusion and the axis of the first nozzle are inclined in directions away from each other.

2. The coating device according to claim 1 , wherein the length of the protrusion is longer than the distance between the position where the first nozzle is attached to the connection part and the tip of the first nozzle.

3. The coating device according to claim 1 , wherein the second nozzle and the protrusion are thinner than the first nozzle.

4. 4. The coating device according to claim 1, wherein the particle diameter of the liquid sprayed from the second nozzle is smaller than the particle diameter of the liquid sprayed from the first nozzle.

5. A method for manufacturing a foamed body by applying a liquid to a coating object made of foamed synthetic resin, a coating step of applying the liquid to the coating target by using the coating device according to any one of claims 1 to 4, The object to be coated has a front surface and a back surface opposite to the front surface in a thickness direction, the rear surface has a base surface, an upstanding surface rising from the base surface, and an opposing surface connected to the upstanding surface and opposing a part of the base surface with a space provided therebetween, In the applying step, the first nozzle sprays the liquid onto at least the base surface, A method for manufacturing a foam, in which the second nozzle sprays the liquid onto at least the upright surface and the opposing surface.

6. A method for producing a foam as described in claim 5, wherein, in the application process, when the liquid is sprayed onto the raised surface and the opposing surface, the tip of the second nozzle is directed toward the raised surface and positioned within the space.

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