JP2008302312A - Nozzle and coating film forming method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nozzle capable of forming a coating film having almost uniform thickness without forming bubbles between the coating film and a coating surface. <P>SOLUTION: The nozzle 11 is used for forming the belt-like coating film on the coating surface by moving a plurality of discharge ports 14a, ..., 14b, ... relatively to the coating surface in a prescribed direction while discharging a coating agent from the plurality of the discharge ports 14a, ..., 14b, .... The plurality of discharge ports 14a, ..., 14b, ... are provided to form 2 lines in a direction corresponding to the traverse width direction of the belt-like coating film wherein one discharge port 14b of the second line of one side of the discharge ports 14a, ..., 14b, ... is provided on an almost intermediate position between the adjacent two discharge ports 14a, 14a of the first line of another side of the discharge ports 14a, ..., 14b, .... <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, for example, while discharging a coating agent such as an adhesive, a sealing agent, or a reinforcing agent from a plurality of discharge ports, the plurality of discharge ports are applied to an application surface of an automobile body part, various parts, or a product. The present invention relates to a nozzle capable of forming a strip-shaped coating film on the coating surface by relatively moving, and a coating film forming method.

  An example of a conventional nozzle will be described with reference to FIGS. As shown in FIG. 11, the nozzle 1 can form a belt-like coating film 4 by applying a coating agent 3 such as an adhesive to a predetermined coating surface 2a of a body part 2 of an automobile, for example. is there. As shown in FIGS. 13A, 13B, and 13C, the nozzle 1 is a plate-like body having a substantially rectangular planar shape, and an inlet 5 for the coating agent 3 is formed at the rear part. A discharge port 6 for the coating agent 3 is formed on the surface. As shown in the enlarged front view of FIG. 13 (c), the discharge port 6 is formed in the shape of an elongated horizontally long slit.

  When the coating film (for example, adhesive) 4 is formed by the nozzle 1, as shown in FIG. 11, first, the slit-like discharge port 6 of the nozzle 1 is, for example, the coating surface of the vehicle body component 2 arranged horizontally. It is made to oppose 2a so that it may become parallel at predetermined intervals. In this state, while the coating agent (for example, adhesive) 3 is continuously discharged from the discharge port 6, the nozzle 1 is orthogonal to the length direction of the discharge port 6 and parallel to the coating surface 2 a 7. Move to. Thereby, the strip-shaped coating film 4 can be formed on the coating surface 2a. In this way, the coating film 4 is formed in a predetermined range on the coating surface 2a, and then another part or the like (not shown) is pressed against the coating film 4. In this manner, another part or the like can be bonded to the vehicle body part 2 via the adhesive.

As another example of the nozzle having such a slit-shaped discharge port, a nozzle for applying the coating agent 3 to the coating surface 2a of a large glass substrate or the like is disclosed (for example, see Patent Document 1).
JP 2000-51763 A

  However, in the conventional nozzle 1, as shown in FIG. 12A, the flow velocity V of the coating agent 3 discharged from the slit-shaped discharge port 6 increases as it approaches the central portion of the discharge port 6. The reason why the flow velocity V is distributed in this way is that the influence of the resistance of the left and right side surfaces of the discharge port 6 becomes smaller as the center of the discharge port 6 is approached.

  Therefore, when the coating film 4 is formed by the nozzle 1 shown in FIG. 11, as shown in the longitudinal sectional view of the coating film 4 shown in FIG. When the central portion of the coating film 4 is raised like this, when the film thickness of the coating film 4 is to be formed at S1, there are many portions where the film thickness of the central portion is S2 (> S1). Therefore, the coating agent 3 in the raised portion at the center is applied excessively, which is uneconomical. Further, when the film thickness S2 of the coating film 4 increases, the coating film 4 spreads along the surface of the vehicle body part 2 when another part or the like is pressed against the vehicle body part 2 and bonded thereto, and the coating film spreads excessively. It may be necessary to wipe off.

  Further, as shown in FIG. 11, since the strip-shaped coating agent 3 is discharged from the slit-shaped discharge port 6, until the strip-shaped coating agent 3 comes into contact with the coating surface 2a and is applied, Air may enter between the strip-shaped coating agent 3 and the coating surface 2a to form bubbles 8. Thus, when the bubble 8 is formed, the coating film 4 of the portion does not adhere to the coating surface 2a, and when the coating agent 3 is an adhesive, due to a decrease in the adhesive strength of the bubble 8 portion, The adhesive strength as a whole decreases, and when the coating agent 3 is a reinforcing agent, the reinforcing strength of the bubble 8 portion is lower than the other portions.

  The present invention has been made to solve the above-described problems, and forms a coating film having a substantially uniform thickness without forming bubbles between the coating film and the coating surface. It is an object of the present invention to provide a nozzle capable of forming a coating film and a coating film forming method.

  According to a first aspect of the present invention, the nozzle according to the first aspect of the present invention has a strip shape on the application surface by moving the plurality of discharge ports in a predetermined direction relative to the application surface while discharging the coating agent from the plurality of discharge ports. The coating film can be formed.

  When forming a strip-shaped coating film on the coating surface using the nozzle according to the first aspect of the present invention, the plurality of discharge ports are made relatively to the coating surface while discharging the coating agent from the plurality of discharge ports of the nozzle. In a predetermined direction. The coating agent discharged from each of the discharge ports is discharged as a linear discharge flow from each of the discharge ports in a state of being spaced apart from each other. These plural discharge flows are connected to each other before reaching the application surface or when applied to the application surface, so that a strip-shaped coating film can be formed on the application surface.

  Further, by providing the plurality of discharge ports along a direction corresponding to the width direction of the strip-shaped coating film, the size of each discharge port in the width direction can be relatively reduced, and thereby, in each discharge port Variations in the flow velocity distribution at each position in the width direction can be reduced. For example, by aligning the size and shape of each discharge port, the flow path resistance of each discharge port, that is, the flow rate at each discharge port can be made substantially equal to each other. As a result, the film thickness at each position in the width direction of the coating film formed in a band shape can be made substantially uniform.

  In addition, immediately after the plurality of discharge flows of the coating agent are discharged from the plurality of discharge ports, a gap is formed between the adjacent ones, so that the plurality of discharge flows are between the plurality of discharge flows and the application surface. Existing air, for example, can escape to the outside from the gap between the discharge streams. Therefore, it is possible to prevent bubbles from being formed between the coating film and the coating surface.

  A nozzle according to a second aspect of the present invention is the nozzle according to the first aspect, wherein the plurality of discharge ports are provided in at least two rows, and the other row is located at a position between two adjacent discharge ports in one row. The discharge port is provided.

  According to the nozzle of the second aspect of the present invention, when the plurality of discharge ports are provided in two or more rows, the total discharge flow rate of the coating agent discharged from the plurality of discharge ports is increased according to the number of rows. Or can be made smaller. Accordingly, it is possible to form a coating film having a desired film thickness using a discharge port having a relatively small opening area. And the center space | interval of the several discharge flow of a coating agent can be narrowed by providing the discharge port of the other row | line | column in the position between the two adjacent discharge ports of one row | line | column. Thereby, the variation in film thickness at each position in the width direction of the belt-like coating film can be further reduced.

  According to a third aspect of the present invention, in the second aspect of the invention, the discharge port of the other row is provided at a substantially middle position between the two adjacent discharge ports of the one row, The interval between the inner surfaces adjacent to each other in the two adjacent ejection ports in the row is identical or substantially coincides with the inner dimension in the same direction as the spacing of the ejection ports in the other row. is there.

  According to the nozzle of the third aspect of the invention, in the first gap formed between the two first discharge flows of the coating agent discharged from the two discharge ports adjacent to each other in one row, the other row There is one second discharge flow of the coating agent discharged from the discharge port, and the dimensions of the first gap and the second discharge flow in the direction corresponding to the horizontal width direction of the coating film match or substantially match. Therefore, when these two first discharge flows and one second discharge flow discharged between them are applied to the application surface, the first discharge flow and the second discharge flow that are adjacent to each other are reliably connected to each other. Can be connected to. Thereby, the variation in film thickness at each position in the width direction of the belt-like coating film can be reduced.

  A nozzle according to a fourth aspect of the present invention is the nozzle according to any one of the first to third aspects, wherein the discharge port is a rectangular hole, a circular hole or an elliptical hole.

  According to the nozzle of the fourth aspect of the invention, when the discharge port is a rectangular hole, for example, when the vertical and horizontal dimensions of each discharge port are the same as compared to a circular hole, the rectangular hole Since the opening area is larger than the opening area of the circular hole, when forming a coating film with the same film thickness, the rectangular hole can reduce the pressure loss at the discharge port than the circular hole. it can. Therefore, labor saving of discharge energy can be achieved. In addition, by making the discharge port a rectangular hole, when two adjacent discharge flows of the coating agent discharged from the plurality of discharge ports are connected to each other on the application surface, the connection portion is the other than that It becomes easy to make the film thickness approximately the same as the portion. However, the discharge port can be a circular hole or an elliptical hole depending on the properties of the coating agent or the ease of processing of the discharge port.

  The nozzle according to a fifth aspect of the present invention is the nozzle according to any one of the first to fourth aspects, wherein the plurality of discharge ports are each formed by a plurality of cylindrical nozzle members each having an outer surface entirely or partially tapered. The plurality of nozzle members are detachably mounted in a plurality of tapered mounting holes formed in the nozzle body, and the contact portions between the nozzle members and the mounting holes are sealed. It is a feature.

  According to the nozzle of the fifth aspect of the present invention, when the coating agent is supplied to the nozzle body, the coating agent supplied to the nozzle body can be discharged from each discharge port through each nozzle member. At this time, the pressure of the coating agent supplied to the nozzle body acts as a force in the direction of exiting from the mounting hole of the nozzle body with respect to each nozzle member, but each nozzle member is engaged with the mounting hole at the tapered surface. Therefore, it can hold | maintain so that each nozzle member may not remove | deviate from each mounting hole. Then, by sealing the contact portion between each nozzle member and each mounting hole with, for example, a seal member or mechanical touch, it is possible to prevent the coating agent from leaking out from the contact portion between them. Moreover, since each nozzle member is detachable from the nozzle body, each nozzle member and nozzle body can be easily processed separately. Further, when each nozzle member and nozzle body are consumed, it is economical because they can be replaced separately.

  A nozzle according to a sixth aspect of the present invention is the nozzle body according to any one of the first to fifth aspects, wherein the nozzle portion or the nozzle member forming the discharge port is provided with the nozzle portion or the nozzle member. It protrudes from the surface toward the coating surface.

  According to the nozzle of the sixth aspect of the invention, the application operation can be performed in a state in which the nozzle body is separated from the application surface by at least the length of the nozzle portion or nozzle member protruding from the nozzle body toward the application surface. it can. Thereby, for example, in the application operation, when the angle of the nozzle with respect to the application surface is changed, the possibility that the surface of the nozzle body comes into contact with the application surface can be reduced. Further, when the operator tries to visually arrange the discharge port at a predetermined position on the application surface, the discharge port can be easily positioned.

  According to a seventh aspect of the invention, in the first aspect of the invention, the plurality of discharge ports are provided in two or more N rows, and the inner surfaces of the two adjacent discharge ports in each row are adjacent to each other. The interval is substantially (N-1) times the inner dimension in the row direction of the discharge ports of each row so that the discharge ports of each row do not overlap each other in the direction orthogonal to the rows. Or, it is characterized in that it is provided so that there are few overlapping portions.

  According to the nozzle of the seventh aspect of the invention, the interval between the inner side surfaces adjacent to each other in the two adjacent discharge ports of each of the plurality of rows is substantially equal to the inner dimension in the column direction of the discharge ports of each row (N− 1) Application that is discharged from each discharge port by doubling and providing each discharge port in each row so as not to overlap each other in the direction orthogonal to the row or to reduce the number of overlapping portions. The center interval of the plurality of discharge flows of the agent can be reduced. Thereby, the variation in film thickness at each position in the width direction of the belt-like coating film can be further reduced.

  According to an eighth aspect of the present invention, there is provided a coating film forming method, wherein the strip-shaped coating film is formed on a coating surface using the nozzle according to any one of the first to seventh aspects. .

  According to the coating film forming method of the eighth aspect of the present invention, a strip-shaped coating film can be formed on the coating surface in the same manner as described above using the nozzle of the present invention.

  According to the nozzle according to the invention of claim 1 and the coating film forming method according to the invention of claim 8, in order to form a strip-shaped coating film, a plurality of discharge ports are provided in a direction corresponding to the lateral width direction of the coating film. By setting it as the structure to arrange | position, the film thickness in each position of the width direction of a strip | belt-shaped coating film can be made substantially uniform, for example. Therefore, for example, it is possible to make it difficult to form a portion exceeding a prescribed film thickness, and thus the coating agent can be used economically. In addition, when the coating agent is an adhesive, for example, when another component is pressed against the component and adhered, the coating film may spread within the allowable range along the surface of the component. Therefore, it is not necessary to wipe off the coating film.

  And, for example, air that exists between the plurality of discharge flows of the coating agent and the coating surface can be released to the outside from the gap between the discharge flows, so that there is a gap between the coating film and the coating surface. It is possible to prevent bubbles from being formed. Therefore, for example, when the coating agent is an adhesive, the adhesive force in each part of the coating film can be made substantially uniform, and when the coating agent is a reinforcing agent, the reinforcing strength in each part of the coating film can be increased. It can be made substantially uniform. When the coating agent is a sealing agent, the sealing strength (hardness to break the sealing property) in each part of the coating film can be made substantially uniform.

  A first embodiment of a nozzle according to the present invention and a coating film forming method using the nozzle will be described below with reference to FIGS. As shown in FIG. 1, the nozzle 11 can form a strip-shaped coating film 12 by applying a coating agent 3 such as an adhesive to a predetermined coating surface 2 a of a car body part 2 of an automobile, for example. is there. The coating agent 3 is, for example, a liquid or other fluidity.

  As shown in FIGS. 3 to 5, the nozzle 11 is a plate-like body having a substantially rectangular planar shape, and an inlet 13 for the coating agent 3 is formed on the lower surface portion, and a plurality of discharges of the coating agent 3 are formed on the front surface portion. Outlets 14 (14a, 14b) are formed. Then, as shown in FIGS. 4 and 5B, a reservoir 15 for the coating agent 3 is formed inside the nozzle 11, and the reservoir 15 includes a plurality of discharge ports 14 (14 a and 14 b). And in communication with the inlet 13. The nozzle 11 includes a first member 16 and a second member 17 that divide the thickness into approximately ½. The first member 16 and the second member 17 include a plurality of bolts 18. It is concluded with.

  As shown in FIGS. 3 to 5, the plurality of discharge ports 14 (14 a, 14 b) are provided in two rows along the length direction of the front surface portion of the nozzle 11. As shown in the enlarged front view of FIG. 6, the upper and lower rows of the plurality of discharge ports 14 (14a, 14b) are rectangular holes having the same shape and dimensions (width W1), and are formed in the same direction. Has been. .., 14b,... In the row direction (lateral width direction) of the discharge ports 14a,..., 14b,. .

  As shown in FIG. 6, one discharge port 14b in the lower second row is provided at an intermediate position between two adjacent discharge ports 14a, 14a in the upper first row. The interval between the first row of discharge ports 14a and the second row of discharge ports 14b is W3. That is, the interval W2 in the width direction of the inner side surfaces 19 and 19 adjacent to each other in the two adjacent discharge ports 14a and 14a (or 14b and 14b) in the upper first row (or the lower second row) is: It is formed by 2 × W3 larger than the inner dimension W1 in the lateral width direction of the lower second row of discharge ports 14b (or the upper first row of discharge ports 14a).

  Further, as shown in FIG. 6 and the like, the plurality of discharge ports 14a in the upper first row are configured by a plurality of rectangular grooves formed on the lower surface of the front wall portion of the upper first member 16. The plurality of discharge ports 14b in the lower second row are constituted by a plurality of rectangular grooves formed on the upper surface of the front wall portion of the lower second member 17. The front wall portion in which the first and second rows of the plurality of discharge ports 14 (14 a, 14 b) are formed constitutes a nozzle portion 20, and the nozzle portion 20 is a nozzle body constituting the nozzle 11. 21 slightly protrudes from the front surface 21a.

  When the band-shaped coating film 12 is formed on the coating surface 2a using the nozzle 11 configured as described above, first, as shown in FIG. 1, a plurality of discharge ports 14 (14a, 14b) of the nozzle 11 are firstly formed. Is opposed to the application surface 2a of the vehicle body part 2 arranged horizontally, for example, so as to be parallel with a predetermined interval. In this state, while the coating agent 3 is continuously discharged from each of the plurality of discharge ports 14 (14a, 14b), the nozzle 11 is orthogonal to the alignment direction of the discharge ports 14,. Move in a direction 22 parallel to 2a. Thereby, the strip-shaped coating film 12 can be formed on the coating surface 2a.

  Then, the coating film 12 is formed in a predetermined range on the coating surface 2a in this way, and then another part (not shown) or the like is pressed against the coating film 12. Thus, another part or the like can be bonded to the vehicle body part 2 via the coating film (adhesive) 12.

  However, in this example, the coating film 12 is formed by moving the nozzle 11 without moving the body part 2, but instead, the coating part 12 is moved by moving the body part 2 without moving the nozzle 11. The film 12 may be formed, or both may be moved in opposite directions to form the coating film 12.

  Next, features of the nozzle 11 of this embodiment will be described. As shown in FIG. 1, according to this nozzle 11, the coating agent 3 discharged from each of the plurality of discharge ports 14a,..., 14b,. 14a, ..., 14b, ... are discharged as a linear discharge flow 23, .... The plurality of discharge streams 23 are connected to each other before reaching the coating surface 2a or when applied to the coating surface 2a, and a strip-shaped coating film is formed on the coating surface 2a. 12 can be formed.

  The plurality of discharge ports 14a,..., 14b,... Are provided along a direction corresponding to the lateral width direction of the strip-shaped coating film 12, as shown in FIGS. Therefore, the dimension W1 in the horizontal width direction of each discharge port 14a,..., 14b,... Can be made relatively small, and thereby the inside of each discharge port 14a,. The variation in the flow velocity distribution at each position in the horizontal width direction can be reduced. Then, by aligning the sizes and shapes of the discharge ports 14a and 14b, the flow path resistances of the discharge ports 14a and 14b can be made substantially equal to each other.

  Accordingly, in this nozzle 11, as shown in FIG. 2A, the flow velocity V of the coating agent 3 discharged from each of the plurality of discharge ports 14a and 14b is substantially constant, and each discharge port The flow velocity V at each position in the lateral width direction in 14a and 14b is also substantially constant. As a result, as shown in FIG. 2B, the film thickness S3 at each position in the lateral width direction of the coating film 12 formed in a strip shape can be made substantially uniform. Therefore, for example, it is possible to make it difficult to form a portion exceeding the prescribed film thickness S3, and thus the coating agent 3 can be used economically.

  Further, immediately after the plurality of discharge streams 23 of the coating agent 3 are discharged from the plurality of discharge ports 14a, ..., 14b, ..., there are gaps between adjacent ones (W3 portion). Therefore, for example, air existing between the plurality of discharge streams 23 and the application surface 2a can escape to the outside from the gaps W3 between the discharge streams 23. Of course, the air existing between the plurality of discharge streams 23 and the application surface 2a is formed in front of the nozzles in the moving direction of the nozzles, and the front gaps between the plurality of discharge streams 23 and the application surface 2a and the lateral direction. It can escape from the gap on the side to the outside. Therefore, it is possible to prevent the bubbles 8 from being formed between the coating film 12 and the coating surface 2a. As a result, for example, when the coating agent 3 is an adhesive, the adhesive force in each part of the coating film 12 can be made substantially uniform. When the coating agent 3 is a reinforcing agent, each of the coating film 12 The reinforcing strength in the portion can be made substantially uniform. When the coating agent 3 is a sealing agent, the sealing strength (hardness to break the sealing property) in each part of the coating film 12 can be made substantially uniform.

  Further, according to the nozzle 11 shown in FIG. 6 and the like, since the plurality of discharge ports 14a and 14b are provided in two rows, the discharge is performed from the plurality of discharge ports 14a and 14b as compared with the case where one row is provided. The overall discharge flow rate of the coating agent 3 can be increased. Accordingly, it is possible to form the coating film 12 having a specified film thickness S3 using the discharge ports 14a and 14b having a relatively small opening area and a lateral width W1. Then, by providing one discharge port 14b in the lower second row at a substantially intermediate position between the two discharge ports 14a, 14a adjacent to each other in the upper first row, as compared with the case where one row is provided. , The interval between the centers of the plurality of discharge flows 23 of the coating agent 3 can be reduced. Thereby, the variation in the film thickness S3 at each position in the width direction of the strip-shaped coating film 12 can be reduced.

  And according to the nozzle 11 shown in FIG. 6, it forms between the two 1st discharge flows 23 and 23 of the coating material 3 discharged from the two discharge ports 14a and 14a adjacent to each other of the upper 1st row | line | column. One second discharge flow 23 (with a lateral width of about W1 (<W2)) of the coating agent 3 discharged from the lower second-row discharge ports 14b exists in the first gap (W2 portion). The lateral width W2 of the first gap is slightly larger than the lateral width W1 of the second discharge flow 23 (gap is W3), but they are substantially coincident with each other, so that these two first discharge flows 23, 23 and one second When the discharge flow 23 is applied to the application surface 2a, the two first discharge flows 23, 23 adjacent to each other and the second discharge flow 23 discharged therebetween are reliably connected to each other. it can. Thereby, the variation in the film thickness S3 at each position in the width direction of the strip-shaped coating film 12 can be reduced.

  Therefore, the gap W3 between the upper first row of ejection openings 14a and the lower second row of ejection openings 14b is such that the properties of the coating agent 3 are such that the film thickness S3 of the coating film 12 has a desired variation. It can be set to an appropriate dimension according to the above.

  Moreover, according to the nozzle 11 shown in FIG. 6 etc., since the discharge ports 14a and 14b are rectangular holes, for example, when the vertical and horizontal dimensions of both the discharge ports are made the same as compared with the case of circular holes. Since the opening area of the rectangular hole is larger than the opening area of the circular hole, when the coating film 12 having the same film thickness S3 is formed, the rectangular hole is more preferable than the circular hole. The pressure loss at can be reduced. Therefore, labor saving of discharge energy can be achieved.

  Further, by forming the discharge ports 14a and 14b as rectangular holes, two adjacent discharge flows 23 and 23 of the coating agent 3 discharged from the plurality of discharge ports 14a and 14b are connected to each other on the application surface 2a. When this occurs, it becomes easy to set the connecting portion to a film thickness S3 substantially the same as the other portions.

  Further, as shown in FIGS. 3 and 4, the nozzle portion 20 can be used in a posture protruding from the front surface 21a of the nozzle body 21 toward the coating surface 2a. The coating operation can be performed in a state where the front surface 21a of the main body 21 is separated from the coating surface 2a. Thereby, for example, in an application operation, when the angle of the nozzle 11 with respect to the application surface 2a is changed, the possibility that the surface of the nozzle body 21 contacts the application surface 2a can be reduced. Further, when the operator visually arranges the discharge port 14 at a predetermined position on the application surface 2a, the discharge port 14 can be easily positioned.

  Thus, according to the coating film forming method according to this embodiment, as shown in FIG. 1, the strip-shaped coating film 12 can be formed on the coating surface 2a using the nozzle 11 as described above. it can.

  Next, a second embodiment of the nozzle according to the present invention will be described with reference to FIG. The difference between the nozzle 25 according to the second embodiment shown in FIG. 7 and the nozzle 11 according to the first embodiment shown in FIG. 6 is that of the discharge ports 26 (26a, 26b) and 14 (14a, 14b). The shape, size, and arrangement. Other than this, the second embodiment is the same as the first embodiment, and the same parts are denoted by the same reference numerals, and detailed description thereof is omitted.

  The nozzle 25 of the second embodiment shown in FIG. 7 has a discharge port 26a,..., 26b,. 26a and 26a), and the interval between (26b and 26b) is W4 which is the same as the horizontal width of each of the discharge ports 26a and 26b. A thin plate-like partition member 27 is sandwiched between the plurality of discharge ports 26a in the upper first row and the plurality of discharge ports 26b in the lower second row. .

  According to the nozzle 25 shown in FIG. 7, the first formed between the two first discharge flows 23, 23 of the coating agent 3 discharged from the two adjacent discharge ports 26a, 26a of the upper first row. One second discharge flow 23 (width is about W4) of the coating agent 3 discharged from the lower second-row discharge ports 26b exists in the gap (W4 portion). Since the lateral width W4 coincides with the lateral width W4 of the second discharge flow 23, when these two first discharge flows 23, 23 and one second discharge flow 23 are applied to the application surface 2a, they are adjacent to each other. It is possible to ensure that the two first discharge flows 23 and 23 that match each other and the second discharge flow 23 discharged therebetween are connected to each other. Thereby, the variation in the film thickness S3 at each position in the width direction of the strip-shaped coating film 12 can be reduced.

  Further, as shown in FIG. 7, the first discharge flow 23 discharged from the upper first row discharge ports 26 a and the lower second row discharge ports 26 b adjacent to the discharge flow 23 were discharged. Since a partition member 27 having a thickness U1 is provided between the second discharge flow 23 and the plurality of discharge flows 23 of the coating agent 3, the plurality of discharge ports 26a,. ,... Immediately after being discharged from, a gap U1 is formed between adjacent ones. As a result, as in the first embodiment, it is possible to prevent the bubbles 8 from being formed between the coating film 12 and the coating surface 2a. As a result, for example, when the coating agent 3 is an adhesive, the adhesive force in each part of the coating film 12 can be made substantially uniform.

  Next, a third embodiment of the nozzle according to the present invention will be described with reference to FIGS. The difference between the nozzle 29 according to the third embodiment shown in FIG. 8 and the nozzle 11 according to the first embodiment shown in FIG. 3 is that the shape of the entire nozzle is different from that of the first embodiment shown in FIG. In the nozzle 29 of the embodiment, the nozzle portion 20 in which the plurality of discharge ports 14 (14a, 14b) in the first and second rows is formed is provided integrally with the nozzle body 21, whereas FIG. In the nozzle 29 of the third embodiment shown in 8 etc., each nozzle member 31 forming each discharge port 30 (30a, 30b) is detachably provided to the nozzle body 32. Other than this, the configuration is the same as that of the first embodiment and acts in the same way, so the equivalent parts are denoted by the same reference numerals and their detailed description is omitted.

  As shown in FIGS. 8 to 10, the nozzle 29 of the third embodiment is a plate-like body having a substantially circular front shape, the inlet 13 for the coating agent 3 is formed on the back surface, and the coating agent is formed on the front surface. Three discharge ports 30 (30a, 30b) are formed. Then, as shown in FIGS. 9B, 9 </ b> C, and 10, the storage portion 15 for the coating agent 3 is formed inside the nozzle 29, and the storage portion 15 includes a plurality of discharge ports 30 a, ..., 30b, ... and the inlet 13 are communicated. The nozzle 29 includes a first member 33 and a second member 34 that divide the thickness into about ½, and the first member 33 and the second member 34 are not shown in the drawing. However, it is connected with the connection metal fitting with which those outer peripheral parts were mounted | worn.

  The plurality of discharge ports 30a,..., 30b,... Are provided in two rows in the upper and lower sides along the horizontal direction on the front surface of the nozzle 29, as shown in FIG. The plurality of upper and lower rows of the plurality of discharge ports 30a and 30b are circular holes having the same shape and size (inner diameter is W5), and are formed in the same direction. Then, as shown in the enlarged cross-sectional view of FIG. 10, the row direction (coating film 12) of the discharge ports 30a,..., 30b,. The distance W6 (≈W5) in the direction corresponding to the horizontal width direction of each is also formed with the same dimension.

  As shown in FIG. 9A, one discharge port 30b in the lower second row is provided at an intermediate position between two adjacent discharge ports 30a and 30a in the upper first row. . Therefore, in FIG. 10, the interval W6 in the lateral width direction of the inner surfaces adjacent to each other in the two adjacent ejection ports 30a, 30a in the upper first row is equal to the lateral width direction of the ejection ports 30b in the lower second row. The dimension is substantially equal to the inner dimension W5.

  Further, as shown in FIG. 9A, FIG. 10, etc., the plurality of discharge ports 30a, 30b in the upper and lower first rows and second rows are respectively formed by a plurality of cylindrical nozzle members 31. The plurality of nozzle members 31 are detachably mounted in a plurality of circular mounting holes 35 formed in the front wall portion of the nozzle body 32, and a contact portion between each nozzle member 31 and each mounting hole 35 is, for example, an O-ring. It is sealed with a sealing member 36 such as.

  However, in order to prevent each nozzle member 31 from coming out of each mounting hole 35 due to the pressure of the coating agent 3 in the nozzle body 32, a tapered cylindrical portion 31a is formed at the base end portion of each nozzle member 31. A tapered hole 35 a is formed in the back side of each mounting hole 35. These taper angles are, for example, about 15 °.

  In addition, although the base end part of each nozzle member 31 was made into the taper shape, it may replace with this and the whole nozzle member 31 is good also as a taper shape. In this case, the entire mounting holes 35 and the like through which the nozzle members 31 are inserted are also tapered.

  That is, as shown in FIG. 10 and the like, each seal member 36 is disposed at a contact portion between each nozzle member 31 and the circular opening edge of each mounting hole 35, and in this state, the front wall portion of the first member 33 It is sandwiched between the pressing member 37 and fixed. The pressing member 37 is fastened and fixed to the first member 33 with four bolts 38. And the nozzle member 31 in which these discharge ports 30a and 30b of these 1st and 2nd rows are formed protrudes from the front surface of the pressing member 37, as shown in FIG.

  When the strip-shaped coating film 12 is formed on the coating surface 2a using the nozzle 29 configured as described above, as in the first embodiment, first, as shown in FIG. The discharge ports 30a,..., 30b,... Are opposed to the application surface 2a of the vehicle body part 2 arranged horizontally, for example, so as to be parallel to each other with a predetermined interval. In this state, while continuously discharging the coating agent 3 from each of the plurality of discharge ports 30a and 30b, the nozzle 29 is orthogonal to the alignment direction of the discharge ports 30a and 30b and parallel to the coating surface 2a. Move to. As a result, as in the first embodiment, the strip-shaped coating film 12 can be formed on the coating surface 2a.

  Then, the coating film 12 is formed in a predetermined range on the coating surface 2a in this way, and then another part (not shown) or the like is pressed against the coating film 12, whereby another part is applied to the vehicle body part 2. Or the like can be bonded through a coating film (adhesive) 12. However, the coating film 12 may be formed by moving the vehicle body part 2 without moving the nozzle 29, or the coating film 12 may be formed by moving both of them in opposite directions.

  Next, features of the nozzle 29 of this embodiment will be described. As shown in FIG. 10 and the like, according to the nozzle 29, when the coating agent 3 is supplied to the nozzle main body 32, the coating agent 3 supplied to the nozzle main body 32 is passed through the nozzle members 31 to the respective discharge ports 30a. ,..., 30b,. At this time, the pressure of the coating agent 3 supplied to the nozzle main body 32 acts as a force in a direction in which the nozzle member 31 comes out of the mounting hole 35 of the nozzle main body 32. Therefore, each nozzle member 31 can be held so as not to be disengaged from each mounting hole 35. And since the contact part of each nozzle member 31 and each mounting hole 35 is sealed with the sealing member 36, the coating agent 3 can be prevented from leaking out from both contact parts. Moreover, since each nozzle member 31 is detachable with respect to the nozzle main body 32, each nozzle member 31 and the nozzle main body 32 can be separately processed easily. Moreover, when each nozzle member 31 and the nozzle main body 32 are consumed, it can be replaced separately, which is economical.

  When each nozzle member 31 shown in FIG. 9B is removed from the nozzle body 32, for example, first, a connection fitting (not shown) is removed from the nozzle 29, and the first member 33 is removed from the second member 34. Then, the pressing member 37 is removed from the first member 33, and each nozzle member 31 is pushed toward the inside of the first member 33. In this way, each nozzle member 31 can be removed from the nozzle body 32. And when attaching each nozzle member 31 to the nozzle main body 32, what is necessary is just to perform the operation | work of said reverse procedure.

  However, in the first to third embodiments, the example in which the adhesive is applied to the application surface 2a as the application agent 3 has been shown. However, in addition to the adhesive, for example, a reinforcing agent or a sealing agent is applied to the application surface 2a. can do.

  Moreover, in the said 1st-3rd embodiment, although the example which apply | coats the coating agent 3 with respect to the application | coating surface 2a of the vehicle body component 2 of an automobile was shown, application | coating of various components or products other than the vehicle body component 2 of an automobile is shown. The coating agent 3 can be applied in a strip shape to the surface.

  Further, in the nozzles 11 and 25 of the first and second embodiments shown in FIGS. 6 and 7, the discharge ports 14 and 30 are rectangular holes, but depending on the properties of the coating agent 3 or the discharge ports 14 and 30. Other than this, for example, a circular hole, an elliptical hole, or a polygonal hole may be used depending on the ease of processing. Similarly, in the third embodiment shown in FIGS. 9A, 9B, and 9C, the discharge port 30 is a circular hole. However, other than this, for example, a rectangular hole, an elliptical hole, or a polygonal hole may be used. .

  And in the nozzle 11 of 1st Embodiment shown in FIG. 6, the space | interval W2 of the two discharge ports 30a and 30a adjacent to each other of the upper 1st row | line | column is set to the inner side dimension W1 of the discharge port 30b of a lower 2nd row | line. However, instead of this, the interval W2 between the two adjacent discharge ports 30a, 30a in the first row may be made smaller than the inner dimension W1 of the discharge port 30b in the second lower row. Good. However, in this case, in order to prevent the first row of discharge ports 30a and the second row of discharge ports 30b from communicating with each other, like the nozzle 25 of the second embodiment shown in FIG. A partition member 27 may be interposed between the second member 17 and the second member 17. Similarly, the nozzles 25 and 29 of the second and third embodiments can be configured as described above.

  In the nozzles 11 and the like of the first to third embodiments shown in FIG. 6 and the like, the discharge ports 14 and the like are provided in two rows. However, the film thickness S3 of the coating film 12 to be formed and the properties of the coating agent 3 are formed. Depending on the above, etc., the discharge ports 14 may be arranged in one row, or in three or more rows. Depending on the case where the film thickness of the coating film 12 to be formed is to be uniform, or the film thickness at each position in the lateral width direction of the coating film 12 is not uniform and is set to a predetermined dimension. The number and arrangement of the discharge ports 14 can be set, and the shape and size of each of the discharge ports 14 can be changed.

  Further, in the nozzles 11 and the like of the first to third embodiments shown in FIG. 6 and the like, the discharge ports 14 and the like are provided in two rows, but instead of this, three or more rows may be provided. For example, when the discharge ports are arranged in N rows such as 3, 4,..., The sizes and shapes of the discharge ports in the first to Nth rows are the same, and two adjacent ones in each row. The interval between the inner side surfaces 19 adjacent to each other in the discharge port is substantially (N-1) times the width of the discharge port in each row, and each discharge port in each row is in the vertical direction shown in FIG. It is good to provide so that it may not mutually overlap, or there may be few parts which mutually overlap.

  And in the nozzle 29 of 3rd Embodiment shown in FIG. 10, although the contact part of each nozzle member 31 and each mounting hole 35 was sealed with the sealing member 36, without using this sealing member 36, for example, a nozzle Sealing may be performed by mechanical touch between the outer surface of the member 31 and the inner surface of the mounting hole 35.

  As described above, the nozzle and the coating film forming method according to the present invention can form, for example, a coating film having a substantially uniform thickness without forming bubbles between the coating film and the coating surface. It has an excellent effect and can be applied to such a nozzle and a coating film forming method.

It is a perspective view which shows the state which forms the coating film in the application surface using the nozzle which concerns on 1st Embodiment of this invention. (A) is a figure which shows the flow rate of the coating agent discharged from each discharge port of the nozzle which concerns on the said 1st Embodiment, (b) was formed with the coating agent discharged from the nozzle which concerns on the said 1st Embodiment. It is an enlarged vertical sectional view showing a coating film. It is a perspective view which shows the nozzle which concerns on the 1st Embodiment. It is a fragmentary sectional top view which shows the nozzle which concerns on the 1st Embodiment. The nozzle which concerns on the 1st Embodiment is shown, (a) is a side view, (b) is a longitudinal cross-sectional view. It is a partial enlarged front view which shows each discharge outlet of the nozzle which concerns on the 1st Embodiment. It is the elements on larger scale which show each discharge outlet of the nozzle which concerns on 2nd Embodiment of the invention. It is a perspective view which shows the nozzle which concerns on 3rd Embodiment of the same invention. The nozzle which concerns on the 3rd Embodiment is shown, (a) is a front view, (b) is a longitudinal cross-sectional view, (c) is AA sectional drawing. It is a partial expanded AA sectional view showing the nozzle concerning the 3rd embodiment. It is a perspective view which shows the state which has formed the coating film in the coating surface using the conventional nozzle. (A) is a figure which shows the flow velocity of the coating agent discharged from each discharge port of the conventional nozzle, (b) is an enlarged longitudinal sectional view showing a coating film formed by the coating agent discharged from the conventional nozzle. It is. The conventional nozzle is shown, (a) is a plan view, (b) is a side view, and (c) is an enlarged front view.

Explanation of symbols

2 Car body parts 2a Coating surface 3 Coating agent 11, 25, 29 Nozzle 12 Coating film 13 Inlet port 14, 14a, 14b Discharge port 26, 26a, 26b Discharge port 30, 30a, 30b Discharge port 15 Reservoir 16, 33 Member 17, 34 Second member 18, 38 Bolt 19 Inner side face of discharge port 20 Nozzle part 21, 32 Nozzle body 21a Front face 22 Movement direction 23 Discharge flow 27 Partition member 31 Nozzle member 31a Taper cylinder part 35 Mounting hole 35a Taper hole part 36 Seal member 37 Holding member 37a Front

Claims (8)

  A nozzle capable of forming a strip-shaped coating film on the application surface by moving the plurality of discharge ports in a predetermined direction relative to the application surface while discharging the coating agent from the plurality of discharge ports. .   The plurality of discharge ports are provided in at least two rows, and the discharge ports in the other row are provided at a position between two adjacent discharge ports in one row. The nozzle described.   The discharge port of the other row is provided at a substantially middle position between the two discharge ports adjacent to each other in the one row, and the inner surfaces of the two adjacent discharge ports in the one row are adjacent to each other. The nozzle according to claim 2, wherein the interval coincides with or substantially coincides with an inner dimension in the same direction as the interval of the discharge ports of the other row.   The nozzle according to any one of claims 1 to 3, wherein the discharge port is a rectangular hole, a circular hole, or an elliptical hole.   The plurality of discharge ports are individually formed by a plurality of cylindrical nozzle members whose outer surfaces are entirely or partially tapered, and the plurality of nozzle members are a plurality of tapered mounting holes formed in the nozzle body. The nozzle according to any one of claims 1 to 4, wherein the nozzle is detachably mounted and a contact portion between each nozzle member and each mounting hole is sealed.   The nozzle part or the nozzle member forming the discharge port protrudes from the surface of the nozzle main body on which the nozzle part or the nozzle member is provided toward the application surface. The nozzle according to crab.   The plurality of discharge ports are provided in two or more N rows, and an interval between inner surfaces adjacent to each other in the two adjacent discharge ports in each row is an inner dimension in the row direction of the discharge ports in each row. It is approximately (N-1) times, and each of the ejection openings of each row is provided so as not to overlap with each other in a direction orthogonal to the row, or to reduce the number of overlapping portions. Item 1. The nozzle according to Item 1.   A method for forming a coating film, comprising forming the strip-shaped coating film on a coating surface using the nozzle according to claim 1.

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