Coating device and method for manufacturing a foam

Abstract

To provide a coating applicator that can reduce variation in liquid application, and to provide a method for manufacturing foam.SOLUTION: A coating applicator includes: an arrangement part on which an object to which coating is applied is arranged; and a coating application head part moving to a plurality of positions preset relatively to the arrangement part. The coating application head part includes a first nozzle and a second nozzle for spraying liquid, where the second nozzle has a spray angle that is larger than a spray angle of the first nozzle.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a coating apparatus and a method for manufacturing a foam.

Background Art

[0002] As a technique for applying a liquid to an object to be coated, Patent Document 1 discloses a technique in which holes are provided in a roller or the like that compresses an object to be coated (sheet pad) made of a foamed resin material, and the liquid is supplied from the holes to the object to be coated simultaneously with the compression of the object to be coated.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the technique of Patent Document 1, since the liquid is supplied to the object to be coated simultaneously with the compression of the object to be coated, it is necessary for a roller or the like to contact the entire surface where the liquid is applied. However, in an object to be coated having a complex shape such as a bag shape or a recessed shape, a roller or the like may not contact the bag-shaped or recessed portion, resulting in variations in liquid application. Even when an operator manually applies a liquid to an object to be coated using a single spray gun, there will be a sufficient portion and an insufficient portion of liquid application, especially in the bag-shaped or recessed portion, resulting in variations in liquid application.

[0005] The present invention has been made to solve this problem, and an object thereof is to provide a coating apparatus and a method for manufacturing a foam that can reduce variations in liquid application even for an object to be coated having a complex shape such as a bag shape or a recessed shape.

Means for Solving the Problems

[0006] To achieve this object, the coating apparatus of the present invention includes an arrangement portion where an object to be coated is arranged, and a coating head portion that moves to a plurality of predetermined positions relative to the arrangement portion. The coating head portion includes a first nozzle that sprays a liquid a connection part provided with a first nozzle, a protruding part protruding from the connection part, and a liquid spraying part provided at the tip of the protruding part a second nozzle and, comprising a first The spraying angle of the two nozzles is larger than that of the first nozzle wherein the axes of the second nozzle and the protruding part and the axis of the first nozzle are inclined in directions away from each other, and the second nozzle and the protruding part are thinner than the first nozzle .

[0007] The method for manufacturing a foam of the present invention includes a coating step of coating a liquid on an object to be coated by a coating apparatus. The object to be coated includes a surface and a back surface on the opposite side in the thickness direction of the surface. The back surface of the object to be coated has a base surface, a rising surface rising from the base surface, and an opposing surface that is connected to the rising surface and provides a space to oppose a part of the base surface. In the coating step, the first nozzle sprays the liquid at least onto the base surface, and the second nozzle sprays the liquid at least onto the rising surface and the opposing surface.

Advantages of the Invention

[0008] According to the coating apparatus described in claim 1, since it is provided with a second nozzle having a larger spraying angle than the first nozzle, even for an object to be coated having a bag-like or recessed shape that is difficult to coat with only the first nozzle, it becomes easier to coat the liquid, and the portion where the coating of the liquid becomes insufficient can be reduced. Therefore, the variation in the coating of the liquid on the object to be coated can be reduced. Furthermore The coating head portion includes a first nozzle that sprays a liquid a connection part provided with a first nozzle, a protruding part protruding from the connection part, and a liquid spraying part provided at the tip of the protruding part a second nozzle and, comprising a first The spraying angle of the two nozzles is larger than that of the first nozzle wherein the axes of the second nozzle and the protruding part and the axis of the first nozzle are inclined in directions away from each other, and the second nozzle and the protruding part are thinner than the first nozzle, so that it is difficult for the first nozzle to interfere with the object to be coated, and it is easy to arrange the second nozzle and the protruding part in the bag-shaped part or the space in the deep part of the object to be coated that cannot be entered by the first nozzle. As a result, it is easy to coat the bag-shaped part and the deep part of the object to be coated, and the variation in coating can be reduced.

[0009] According to the coating apparatus described in claim 2, in the coating apparatus described in claim 1, since the length of the protruding portion is longer than the distance between the position where the first nozzle is attached to the connecting portion and the tip of the first nozzle, even for an object to be coated having a bag-like or recessed shape, it becomes easier to coat the liquid on the inner portion, and the portion where the coating of the liquid becomes insufficient can be reduced. Therefore, the variation in the coating of the liquid on the object to be coated can be further reduced.

[0010] According to the coating apparatus described in claim 3, in claim1 In the coating apparatus described, The particle size of the liquid sprayed from the second nozzle is smaller than the particle size of the liquid sprayed from the first nozzle from The second nozzle can spray the coating liquid farther than the first nozzle. Therefore, it is easy to apply the coating liquid to the bag-shaped part and the part having a deep shape by the second nozzle. As a result, the variation in the application of the liquid to the object to be coated can be further reduced.

[0011]

[0012] According to the method for manufacturing a foam described in claim 4 since the vertical surface and the opposing surface are coated with a second nozzle having a larger spraying angle than the first nozzle, even for an object to be coated having a vertical surface or an opposing surface that is difficult to coat with only the first nozzle, it becomes easier to apply the liquid to the vertical surface, the opposing surface, and the base surface of the portion facing the opposing surface, and the portion where the application of the liquid becomes insufficient can be reduced. Therefore, variations in the application of the liquid to the object to be coated can be reduced.

[0013] According to the method for manufacturing a foam described in claim 5 in the method for manufacturing a foam described in claim 4 since the tip of the second nozzle having a larger spraying angle than the first nozzle is positioned in the space toward the vertical surface when spraying the liquid onto the vertical surface and the opposing surface, it is possible to make it difficult for the sprayed liquid to spread outside the space.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0015] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. With reference to FIG. 1, the coating apparatus 10 in one embodiment will be described. FIG. 1 is a schematic diagram of the coating apparatus 10 in one embodiment. The coating apparatus 10 is an apparatus that sprays and applies a liquid to a coating object 30 (see FIG. 2) arranged in the arranging portion 20.

[0016] The coating apparatus 10 includes a table-like arranging portion 20 on which the coating object 30 is arranged. In the present embodiment, the arranging portion 20 is table-like, but it may be one that places and conveys the coating object 30 thereon like a belt conveyor, or one that grasps and fixes the coating object 30. The coating object 30 is arranged on the arranging portion 20 with the surface to which the liquid is to be applied exposed.

[0017] The coating apparatus 10 includes a robot 40. The robot 40 includes an arm 42 having a plurality of joints and a base 41 that supports the arm 42. A coating head portion 43 (end effector) is provided at the tip of the arm 42. The robot 40 is a six-axis robot that can operate the coating head portion 43 in six axial directions with respect to the arranging portion 20, namely, the height direction (the vertical direction in the plane of FIG. 1), the lateral direction orthogonal to the height direction (the left-right direction in the plane of FIG. 1), the longitudinal direction orthogonal to both the height direction and the lateral direction (the vertical direction perpendicular to the plane of FIG. 1), and the directions of rotation around the axes extending in the height direction, the lateral direction, and the longitudinal direction, respectively. The coating head portion 43 moves to a plurality of predetermined positions relative to the arranging portion 20.

[0018] The coating head portion 43 includes a connection portion 44 that connects the arm 42 to the first nozzle 45 and the second nozzle 46. The first nozzle 45 and the second nozzle 46 are respectively attached to the connection portion 44 by a mechanical method such as screwing, either directly or via other members. The axis of the second nozzle 46 is inclined by an angle θ1 with respect to the axis of the first nozzle 45 and faces a different direction. For example, the angle θ1 is between 20° and 90°. In FIG. 1, the illustration of the pipes for supplying air or liquid to the first nozzle 45 and the second nozzle 46 is omitted. The liquid from the first nozzle 45 and the second nozzle 46 is sprayed in a mist form, and small liquid particles adhere to the object 30 to be coated for coating.

[0019] The coating head portion 43 includes a protruding portion 50 that protrudes from the connection portion 44. The protruding portion 50 includes the second nozzle 46 such that the tip 48 of the second nozzle 46 is present 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 connection 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 where the protruding portion 50 protrudes from the connection portion 44 and the tip 48 of the second nozzle 46. For example, the length L2 is between 50 mm and 250 mm, preferably between 100 mm and 200 mm.

[0020] The thicknesses of the second nozzle 46 and the protruding portion 50 are smaller than the thickness of the first nozzle 45. Therefore, when applying the liquid, the second nozzle 46 and the protruding portion 50 can be inserted into a narrow portion where the first nozzle 45 cannot enter for coating. Thus, the portion where the liquid application is insufficient can be reduced.

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

[0022] The second nozzle 46 preferably has a liquid spraying amount per unit time greater than that of the first nozzle 45. In this case, even if the spraying angle of the second nozzle 46 is larger than that of the first nozzle 45, the amount of liquid per unit area sprayed from the second nozzle 46 can be made closer to or greater than the amount of liquid per unit area sprayed from the first nozzle 45. Thus, the difference in the amount of liquid applied per unit time between the portions coated by the first nozzle 45 and the second nozzle 46 can be reduced, and the variation in the liquid application to the object 30 to be coated can be reduced.

[0023] It is preferable that the size of the liquid particles sprayed from the second nozzle 46 is smaller than the size of the liquid particles sprayed from the first nozzle 45. When the size of the liquid particles sprayed from the second nozzle 46 is small, it is more likely to be in a mist form compared to the liquid sprayed from the first nozzle 45. Thus, the liquid sprayed from the second nozzle 46 can be made to fly farther, and it is easier to apply the liquid to the portions having a deep shape.

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

[0025] The coating apparatus 10 includes a recognition device 60 that acquires the shape of the object 30 to be coated disposed in the placement portion 20 and the position information of the object 30 to be coated. The recognition device 60 is attached above the placement portion 20. The information on the shape of the object 30 to be coated acquired by the recognition device 60 is, for example, information on an image taken by a camera, and the recognition device 60 analyzes the image to recognize the shape. The position information of the object 30 to be coated is the relative distance from a predetermined point of the placement portion 20 to a certain point of the object 30 to be coated, and is the respective distances in the height direction from the placement portion 20, the lateral direction orthogonal to the height direction, and the longitudinal direction orthogonal to both the height direction and the lateral direction.

[0026] As means for the recognition device 60 to acquire information, in addition to those that capture images with a camera, non-contact types such as those using a laser or those using infrared rays are preferably adopted. In the present embodiment, the recognition device 60 is provided separately from the coating head portion 43 of the robot 40, but it may also be provided in the coating head portion 43 of the robot 40. In this case, the recognition device 60 is associated with the position information where the coating head portion 43 is located, and acquires the shape of the object to be coated 30 and the position information of the object to be coated 30.

[0027] The coating device 10 includes a processing device 70 connected to the recognition device 60. The recognition device 60 transmits the acquired information to the processing device 70. The processing device 70 discriminates an object to be coated that matches the shape of the object to be coated 30 acquired from the recognition device 60 from among the shapes of a plurality of objects to be coated recorded in advance in the processing device 70. The processing device 70 corrects the difference between the position information of the object to be coated 30 with respect to the placement unit 20 and the position information pre-recorded in the processing device 70 based on the position information of the object to be coated 30 transmitted from the recognition device 60. Further, the processing device 70 is connected to the robot 40, and based on the shape of the discriminated object to be coated 30, a pre-recorded coating program is selected, and according to the corrected position information, it gives a movement command to the arm 42 and a spraying command to the first nozzle 45 and the second nozzle 46.

[0028] The arm 42 that has received the movement command from the processing device 70 moves the coating head portion 43 to a plurality of predetermined positions relative to the placement unit 20. These plurality of positions are positions where the tips 47 of the first nozzle 45 and the tips 48 of the second nozzle 46 are directed toward respective predetermined portions of the object to be coated 30 when the object to be coated 30 is placed on the placement unit 20. These plurality of positions are set respectively for each shape of the object to be coated 30.

[0029] The coating head portion 43 sprays the liquid while stopping at a plurality of predetermined positions relative to the placement portion 20 or moving to a plurality of positions. Further, the spraying of the liquid from the first nozzle 45 and the second nozzle 46 may be continuous or intermittent.

[0030] The timing and order of spraying the liquid from the first nozzle 45 and the second nozzle 46 are appropriately set according to the shape and size of the object 30 to be coated. Also, the spraying of the liquid from the first nozzle 45 and the second nozzle 46 may be performed simultaneously, for each nozzle, or a combination thereof.

[0031] With reference to FIGS. 2, 3(a) and 3(b), a method for manufacturing a foam with a liquid applied to the object 30 to be coated will be described. FIG. 2 is a rear view of the object 30 to be coated. FIG. 3(a) is a cross-sectional view of the object 30 to be coated taken along line III-III when applying the liquid using the first nozzle 45, and FIG. 3(b) is a cross-sectional view of the object 30 to be coated taken along line III-III when applying the liquid using the second nozzle 46. In FIGS. 2, 3(a) and 3(b), in the figure, the arrows U-D, L-R, F-B indicate the vertical direction, horizontal direction, and front-rear direction of the object 30 to be coated, respectively.

[0032] The object 30 to be coated is made of a foamed synthetic resin and is, for example, a cushion used for vehicle, office, and household soft urethane seat cushions, seat backs, headrests, armrests, and ottomans, vehicle instrument panels, and interior parts of hard urethane for door parts. In the present embodiment, the object 30 to be coated is exemplified by a cushion (seat pad) used for a seat back.

[0033] As shown in FIG. 2, the object 30 to be coated has a main body portion 33 extending in the vertical direction, side portions 34, 34 connected to both ends of the main body portion 33 in the left - right direction, and a bent portion 35 extending from above the main body portion 33 to the rear (the front side of the paper surface of FIG. 2), with a space between the bent portion 35 and the main body portion 33. Similar to the bent portion 35, the side portions 34 extend rearward from both ends of the main body portion 33 in the left - right direction and have portions facing the main body portion 33 with a space therebetween. The side portions 34, 34 are connected to the respective left - right ends of the bent portion 35 at the upper side. The side portion 34 bulges forward (the back side of the paper surface of FIG. 2) from the main body portion 33.

[0034] As shown in FIG. 3(a), the object 30 to be coated has a front surface 31 including the front - side surface of the main body portion 33 and the surfaces of the side portions 34 and the bent portion 35 facing outward, and a back surface 32 which is the surface on the opposite side of the thickness direction of the front surface 31. The back surface 32 includes a base surface 36 forming the rear - side surface of the main body portion 33, a rising surface 37 rising rearward from the base surface 36, and an opposing surface 38 connected to the rising surface 37 and facing a part of the base surface 36 with a space 39 therebetween. The back surfaces 32 of the side portions 34, 34 and the bent portion 35 are constituted by the rising surface 37 and the opposing surface 38. Among the back surface 32 of the object 30 to be coated, the rising surface 37, the opposing surface 38, and the base surface 36 of the portion facing the opposing surface 38 are in a bag - like or recessed shape.

[0035] The fact that the opposing surface 38 faces a part of the base surface 36 with a space therebetween is not limited to the case where the opposing surface 38 and a part of the base surface 36 are parallel to each other. The opposing surface 38 may be inclined by an angle θ2 with a space provided between it and a part of the base surface 36. In this case, the angle θ2 of the opposing surface 38 with respect to a part of the base surface 36 is 0° < θ2 ≦ 90°.

[0036] The object to be coated 30 is attached to a vehicle seat frame, seat pan, etc., and then a skin is attached to the outer shape of the object to be coated 30. On the back surface 32, an anti-noise agent (liquid) is applied to prevent the generation of abnormal noise due to rubbing against the seat frame or seat pan. As the anti-noise agent, for example, a fluororesin such as polytetrafluoroethylene or a paraffin-based lubricant such as paraffin wax is preferably used. In the present embodiment, the liquid applied to the object to be coated 30 is an anti-noise agent, but it is not limited thereto. For a desired purpose, adhesives, neutralizing agents, surface treatment agents, rust preventives, etc. are appropriately adopted as the liquid.

[0037] A method for manufacturing a foam will be described. The foam includes the object to be coated 30 and the 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 a coated object 30 (seat pad) made of a foamed synthetic resin. The formed object to be coated 30 is taken out of the mold, and the object to be coated 30 is compressed by a roller or a mold divided into upper and lower parts, or the object to be coated 30 is placed under reduced pressure to crush the closed cells in the object to be coated 30 and suppress the deformation of the object to be coated 30 due to temperature changes after foam molding. A crashing process is performed. After the crashing process, the compression by a roller or the like is released, or the pressure under reduced pressure is restored to restore the shape of the object to be coated 30.

[0038] Thereafter, as shown in FIGS. 3(a) and 3(b), a coating process is performed in which a liquid is applied to the object to be coated 30 by the coating device 10 to obtain a foam in which the liquid is applied to the object to be coated 30 made of a foamed synthetic resin.

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

[0040] Based on the shape information of the object 30 to be coated and the position information of the object 30 to be coated acquired by the recognition device 60, and the coating program and the corrected position information corresponding thereto, the arm 42 operates according to a movement command from the processing device 70, and the coating head unit 43 moves to a plurality of predetermined positions relative to the placement unit 20. The first nozzle 45 and the second nozzle 46 spray liquid according 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 facing surface 38 is coated by spraying the liquid from the first nozzle 45. At this time, the first nozzle 45 sprays the liquid with the tip 47 of the first nozzle 45 facing the base surface 36 other than the portion facing the facing surface 38. Since the axis of the second nozzle 46 is oriented in a direction different 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 at a longer distance from the connection portion 44 by the angle θ1 at which the axes of the two nozzles are inclined, is less likely to interfere with the object 30 to be coated. Therefore, the tip 47 of the first nozzle 45 can be brought closer to the base surface 36 to accurately spray the liquid.

[0042] As shown in FIG. 3(b), the standing surface 37, the facing surface 38, and the base surface 36 of the portion facing the facing surface 38 are coated by spraying the 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 thicknesses of the second nozzle 46 and the protruding portion 50 are sufficiently small with respect to the distance between the facing surface 38 and the base surface 36 of the portion facing the facing surface 38. Therefore, the tip 48 of the second nozzle 46 and the protruding portion 50 can be positioned within the space 39 when coating.

[0043] At this time, the tip 48 of the second nozzle 46 is directed toward the standing surface 37. Since 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 standing surface 37, the facing surface 38, and the base surface 36 of the portion facing the facing surface 38 can be simultaneously coated by spraying the liquid.

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

[0045] Furthermore, since the tip 48 of the second nozzle 46 is positioned within the space 39 and liquid is sprayed toward the upright surface 37 with a small open portion to the outside, even when spraying liquid from the second nozzle 46 with a spraying angle larger than that of the first nozzle 45, the sprayed liquid is less likely to spread outside the space 39. Thus, waste of the sprayed liquid is reduced.

[0046] In the coating process, from after placing the object to be coated 30 on the placement unit 20 until the completion of the liquid coating operation on the object to be coated 30, all the recognition device 60, the processing device 70, and the robot 40 perform automatically, so labor can be saved.

[0047] As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to these at all, and it can be easily inferred that various improvements and modifications are possible without departing from the spirit of the present invention.

[0048] In the embodiment, the case where the robot 40 is a six-axis robot has been described, but it is not necessarily limited to this. The robot 40 may be a gantry loader or a robot with a smaller or larger number of operable axes than six axes. Among these, even when the robot 40 has a smaller number of operable axes than six axes, since the axis of the second nozzle 46 is oriented in a different direction from the axis of the first nozzle 45 by the angle θ1, even for a part of the object to be coated 30 that cannot be coated by only one of the first nozzle 45 or the second nozzle 46, it can be coated with the other nozzle.

[0049] In the embodiment, the case where the placement unit 20 does not move and the coating head unit 43 moves to a plurality of predetermined positions relative to the placement unit 20 has been described. However, it is not necessarily limited to this. Within the range where the recognition device 60 can acquire information and within the range where the coating head unit 43 can move, the placement unit 20 may hold the object 30 to be coated and move the object 30 to be coated along with the movement of the placement unit 20. In this case, both the placement unit 20 and the coating head unit 43 may move, or only the placement unit 20 may move. At this time, the plurality of predetermined positions relative to the placement unit 20 are such that, regardless of the case where the placement unit 20 moves, with the movement, the relationships with the distances in the height direction, lateral direction, and longitudinal direction with respect to the placement unit 20 are the same as those in the case where the placement unit 20 does not move. Regardless of the position of the placement unit 20 after movement, the relative positional relationship between the placement unit 20 and the plurality of predetermined positions where the coating head unit 43 moves does not change. 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 placement unit 20 and directed in the same direction.

[0050] In the embodiment, the case where the second nozzle 46 is a part of the protruding portion 50 has been described. However, it is not necessarily limited to this. It is naturally possible to make the entire second nozzle 46 a protruding portion 50 protruding from the connecting portion 44 such that the tip 48 of the second nozzle 46 is present at the tip of the protruding portion 50.

[0051] In the embodiment, the case where the opposing surface 38 is inclined by the angle θ2 shown in FIG. 3(a) has been described. However, it is not necessarily limited to this. As long as the tip on the side opposite to the side connecting to the standing surface 37 of the opposing surface 38 is separated from the base surface 36, the distance between the opposing surface 38 and the base surface 36 may increase as it approaches the standing surface 37 from the tip on the side opposite to the side connecting to the standing surface 37 of the opposing surface 38. In this case, the opposing surface 38 is inclined by an angle θ3 with respect to the base surface 36 from the tip on the side opposite to the side connecting to the standing surface 37 of the opposing surface 38 toward the standing surface 37. At this time, the opposing surface 38 is inclined to the opposite side compared to the case where the opposing surface 38 is inclined by the angle θ2. For example, 0° < θ3 ≦ 10°.

[0052] The opposing surface 38 may have a recessed portion at the rear, a bulging portion at the front, as long as the opposing surface 38 is spaced apart from the base surface 36. Further, the opposing surface 38 may be shaped to bend so as to bring the tip of the opposing surface 38 closer to or away from the base surface 36. In any case, among the recessed portion, the bulging portion, and the bent shape of the opposing surface 38, the angle with respect to the base surface 36 of the portion that slopes so as to approach the base surface 36 from the standing surface 37 toward the tip of the opposing surface 38 is preferably 10° or less.

Explanation of reference numerals

[0053] 10 Coating device 20 Arrangement part 30 Object to be coated 32 Back surface 36 Base surface 37 Standing surface 38 Opposing surface 39 Space 43 Coating head part 44 Connection part 45 First nozzle 46 Second nozzle 50 Protrusion

Claims

1. A coating device for coating a liquid onto a coating object, comprising: a placement part where the coating object is placed; a coating head part that moves to a plurality of predetermined positions relative to the placement part, wherein the coating head part includes a first nozzle for spraying the liquid, a connection part provided with the first nozzle, a protruding part protruding from the connection part, and a second nozzle provided at the tip of the protruding part for spraying the liquid. The spraying angle of the second nozzle is larger than the spraying angle of the first nozzle. The axes of the second nozzle and the protruding part and the axis of the first nozzle are inclined in a direction away from each other. The second nozzle and the protruding part are thinner than the first nozzle.

2. The coating device according to Claim 1, wherein the length of the protruding part 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 particle diameter of the liquid sprayed from the second nozzle is smaller than the particle diameter of the liquid sprayed from the first nozzle.

4. A method for manufacturing a foam by coating a liquid onto a coating object made of foamed synthetic resin, comprising: a coating step of coating the liquid onto the coating object by the coating device according to Claim 1, wherein the coating object includes a surface and a back surface on the opposite side in the thickness direction of the surface, the back surface has a base surface, a rising surface rising from the base surface, and an opposing surface connected to the rising surface and providing a space to oppose a part of the base surface, in the coating step, the first nozzle sprays the liquid at least onto the base surface, and the second nozzle sprays the liquid at least onto the rising surface and the opposing surface.

5. The method for manufacturing a foam according to Claim 4, wherein when spraying the liquid onto the rising surface and the opposing surface in the coating step, the tip of the second nozzle is directed toward the rising surface and the tip of the second nozzle is located within the space.

Images