JP2013052379A - Coating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating device capable of achieving uniform wide coating.SOLUTION: In the coating device for coating a fluid F by relatively moving a discharge device 1 which discharges the fluid F to a coated surface 3A (3B), the discharge device 1 is provided with a plurality of discharge nozzles 10 which each have a slit-like discharge port 10A for discharging the fluid F, and are arranged so that the discharge ports 10A make a line at least along a relative movement direction Z.

Description

  The present invention relates to a coating apparatus.

  In a vehicle or the like, a power element module in which a power semiconductor is solidified with a resin is mounted. Generally, a cooler is closely attached to the power element module for heat dissipation. The power element module and the cooler are usually in close contact with each other through a thin heat radiation grease having a thickness of about 100 μm or less. Conventionally, a screen printing method has been widely used as a coating method for thinly applying high-viscosity heat dissipation grease to a power element module.

  In the conventional method, in order to apply heat dissipation grease to the entire application surface, a large amount of heat dissipation grease is prepared on the screen and applied to the power element module, and excessive heat dissipation grease that is not applied to the power element module is generated on the screen. Many remain on top. After the heat radiation grease is applied to one or more power element modules, the remaining heat radiation grease is removed by cleaning. The conventional method requires a large amount of heat-dissipating grease, and it is necessary to clean and remove the remaining heat-dissipating grease, which is not good in terms of cost and efficiency.

  As a method of applying the heat dissipation grease, there is a method of applying the discharge nozzle having a slit-like discharge port for discharging the heat dissipation grease in one direction relative to the application surface of the power element module.

In Patent Document 1, a viscous material guide groove (63) for applying a viscous material (BN) on an object (110) in a uniform area and a viscous material (BN) into the viscous material guide groove (63) are disclosed. Viscosity applied from the viscous material guide groove (63) to the object (110) by keeping the interval between the injection part (64) to be injected, the viscous material guide groove (63) and the object (110) constant. There is disclosed a viscous material (BN) application nozzle (10) provided with a protrusion (65) that makes the application thickness (D) of the material (BN) constant (claim 1, FIG. 4 to FIG. 6).
The coating apparatus described in Patent Document 1 holds an object (110) horizontally and applies a viscous material (BN) to one of its application surfaces (FIGS. 1-2). The size of the coating nozzle (10) on the side of the object (110) is smaller than the size of the object (110), and the coating nozzle (10) is moved in two axial directions (X direction and Y direction) of the coating surface. To do.

Patent Document 2 discloses a distributor (9) having a plate member (26) on which a plurality of discharge nozzles (14) arranged in a direction with an interval are formed (FIGS. 1 and 3). The distributor (9) holds the object horizontally and applies the viscous fluid (2) to one application surface thereof.
In the distributor (9), a first extending path (18) extending from each discharge nozzle (14) and an extending end of a pair of adjacent first extending paths (18, 18) communicate with each other. One communication path (19), a second extension path (20) extending from the longitudinal center of each first communication path (19), and a pair of adjacent second extension paths (20, 20) A second communication path (21) that allows the extension ends to communicate with each other, and an nth extension path (22) and an nth communication path (n is a positive integer equal to or greater than 3) that are sequentially formed in the same manner as described above. ) (23), and the extension end portion of the single nth extension passage (22) and the inflow portion (13) through which the viscous fluid (2) from the pressurizing pump (7) flows are communicated with each other. (Claim 1, FIG. 1 and FIG. 3).

  Patent Document 3 discloses a coating apparatus including a nozzle (5) in which a plurality of discharge nozzles (5a, 5b, 5c) arranged in a single direction at intervals are formed (FIG. 7). This coating apparatus holds a target object horizontally and applies a viscous fluid to one application surface thereof.

JP 09-290194 A JP 2004-050135 A Japanese Patent Laid-Open No. 2001-044602

In the coating apparatus described in Patent Document 1, the width of the discharge port of the coating nozzle is small relative to the width of the object, and wide coating with a sufficiently wide width cannot be performed only by relative movement in one direction.
In the coating apparatus described in Patent Document 1, uniform coating is possible if the width of the discharge port is about 10 mm. However, when the width of the discharge port becomes wide, for example, about 50 mm, uniform application in the width direction becomes difficult, and application unevenness such as a region where heat radiation grease called streaks or scales is not satisfactorily applied tends to occur.

  In the coating apparatus described in Patent Documents 2 and 3, a plurality of round discharge nozzles are arranged side by side at intervals. Since an interval is formed between a plurality of round discharge nozzles, uniform application in the width direction is difficult when performing wide application.

  In addition, as described in Patent Documents 1 to 3, conventionally, in order to prevent the radiating grease from dripping, the application of the radiating grease is usually performed with the application surface of the power element module held horizontally. Has been done. In the case of an inverter cooling structure that cools the power element module from both sides, heat radiation grease and an insulator must be applied to both sides of the power element module in separate steps. Therefore, it is necessary to apply heat dissipation grease to one surface of the power element module and attach an insulator, then turn the power element module upside down, apply heat dissipation grease to the other surface, and attach the insulator. Such a method requires a complicated and costly coating apparatus having a large number of steps.

This invention is made | formed in view of the said situation, and it aims at providing the coating device which can implement uniform wide application | coating.
Another object of the present invention is to provide a coating apparatus capable of easily performing double-side coating of a flat object.

The coating apparatus of the present invention is a coating apparatus that applies the fluid by relatively moving a discharge device that discharges fluid to a surface to be coated,
The discharge device includes a plurality of discharge nozzles, each having a slit-like discharge port for discharging the fluid, and the discharge ports arranged at least along the direction of the relative movement. is there.

  In the coating apparatus according to the aspect of the invention, it is preferable that the plurality of discharge nozzles are arranged so that the discharge ports are aligned along the relative movement direction and the width direction of the discharge ports.

  The coating apparatus of the present invention includes a holding unit that holds the coated surface in a direction intersecting the ground, and the discharge ports of the plurality of discharge nozzles of the discharge device with respect to the coated surface. It is preferable that a relative movement unit that relatively moves in a direction intersecting the ground is provided.

ADVANTAGE OF THE INVENTION According to this invention, the coating device which can implement uniform wide coating can be provided.
According to the present invention, it is also possible to provide a coating apparatus capable of easily performing double-side coating of a flat object.

It is a perspective view of the discharge device which makes the coating device of one embodiment concerning the present invention. It is a see-through | perspective side view during application | coating of a flat object and the discharge apparatus of FIG. It is a top view of the 1st nozzle formation part (shim) which makes the discharge apparatus of FIG. 1, and its vicinity. It is a perspective view of a flat object and its holding means.

A configuration of a coating apparatus according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a discharge device constituting the coating device of the present embodiment. FIG. 2 is a perspective side view of the flat object and the dispensing apparatus of FIG. 1 during application. FIG. 3 is a plan view of the first nozzle forming portion (shim) forming the discharge device of FIG. 1 and the vicinity thereof. FIG. 4 is a perspective view of a flat object and its holding means.
The drawings are simplified so as to be different from actual ones as appropriate.

As shown in FIG. 2, the coating apparatus according to the present embodiment includes a discharge device 1 that discharges a fluid F such as heat-dissipating grease to a coated surface 3 </ b> A (3 </ b> B) of a flat object 3 such as a power element module. It is a device that applies fluid F by relatively moving. The coating apparatus of the present embodiment is an apparatus that can apply both sides of a flat object 3.
In the coating apparatus of the present embodiment, the fluid F can be applied by relatively moving the discharge device 1 in a direction intersecting the ground. In the illustrated example, the relative movement direction of the discharge device 1 is the vertical lowering direction Z. In the figure, Z1 indicates the relative movement speed of the discharge device 1.
FIG. 2 is a drawing during application of the fluid F to one application surface 3 </ b> A of the flat object 3.

As shown in FIG. 4, the coating apparatus of the present embodiment includes a holding unit 2 that holds the surfaces to be coated 3 </ b> A and 3 </ b> B upright in a direction intersecting the ground (vertical direction in the present embodiment). In the present embodiment, the holding means 2 holds a pair of objects 3 so as to stand from the side end side thereof in a direction in which the coated surfaces 3A and 3B intersect the ground (vertical direction in the present embodiment). Holding tools 31 and 32 are provided.
The design of the holding means 2 can be changed as appropriate.

As shown in FIGS. 2 and 3, the discharge device 1 includes a plurality of discharge nozzles 10.
Each discharge nozzle 10 includes a slit-shaped discharge port 10A for discharging the fluid F, a flow path 10B for the fluid F connected to the discharge port 10A, and a fluid storage portion (manifold) 10C for storing the fluid F. . A supply pipe 11 to which a fluid F is supplied from the outside is connected to the fluid reservoir (manifold) 10C.

As shown in FIGS. 2 and 3, the plurality of discharge nozzles 10 are arranged such that the discharge ports 10A are arranged along the relative movement direction Z and the width direction X of the discharge ports 10A.
In the present embodiment, the plurality of discharge nozzles 10 arranged so that the discharge ports 10 </ b> A are arranged along the relative movement direction Z are formed in different nozzle forming portions (shim) 21 and 22.

In the present embodiment, two nozzle forming portions (shims) 21 and 22 are formed in the relative movement direction Z, and the two nozzle forming portions (shims) 21 and 22 are applied surfaces 3A (3B). Are arranged at different angles.
In each of the forming portions (shim) 21 and 22, two discharge nozzles 10 are formed side by side in the width direction X of the discharge port 10A.

  In the present embodiment, the first nozzle forming portion (shim) 21 on the front side with respect to the relative movement direction Z includes a first surface 21X perpendicular to the application surface 3A (3B) and an application surface. 3A (3B) and a second surface 21Y that is oblique to the first surface 21X. In the first nozzle forming portion (shim) 21, the discharge port 10A, the flow path 10B of the fluid F connected to the discharge port 10A, and the fluid storage portion (manifold) 10C in which the fluid F is stored are: It is formed along the surface 21X.

  The second nozzle forming portion (shim) 22 on the rear side with respect to the relative movement direction Z includes a first surface 22X formed on the second surface 21Y of the first nozzle forming portion (shim) 21; A second surface 22Y facing the first surface 22X is provided in parallel with the first surface 22X. In the second nozzle forming portion (shim) 22, the discharge port 10A, the flow path 10B of the fluid F connected to the discharge port 10A, and the fluid storage portion (manifold) 10C in which the fluid F is stored are: It is formed along the surface 22X.

  With this configuration, in the present embodiment, the flow path 10B of the fluid F connected to the discharge ports 10A provided in the plurality of discharge nozzles 10 arranged so that the discharge ports 10A are arranged along the relative movement direction Z is Different angles are formed with respect to the coating surface 3A (3B).

  The diameter of the discharge port 10A is not particularly limited, and is preferably about 30 to 100 μm, for example.

The application thickness of the fluid F is mainly the distance between the discharge port 10A of the second nozzle forming portion (shim) 22 on the rear side with respect to the relative movement direction Z of the discharge device 1 and the surface to be coated 3A (3B). It is determined by the supply flow rate F1 of the fluid F to the discharge device 1 and the relative movement speed Z1 of the discharge device 1 with respect to the object 3 (see FIG. 2 for F1 and Z1).
The interval between the discharge port 10A of the second nozzle forming portion (shim) 22 on the rear side and the coated surface 3A (3B) is not particularly limited, and is preferably about 30 to 100 μm, for example.

  In the first nozzle forming portion (shim) 21 on the front side, the angle θ formed by the first surface 21X and the second surface 21Y is appropriately designed depending on the number of nozzle forming portions (shim) and is not particularly limited. As shown in FIG. 2, in the configuration including two nozzle forming portions (shim) 21 and 22, the first surface 21 </ b> X and the second surface 21 </ b> Y in the first nozzle forming portion (shim) 21 on the front side. Is preferably 15 to 45 °, for example.

The discharge device 1 is provided with relative moving means for relatively moving the discharge ports 10A of the plurality of discharge nozzles 10 of the discharge device 1 with respect to the coated surfaces 3A and 3B in a direction intersecting the ground. Specifically, a pair of guide rollers 23 is provided on the front side of the first nozzle forming portion (shim) 21. In the figure, reference numeral 24 denotes a main body.
The first and second nozzle forming portions (shim) 21 and 22 in which the plurality of discharge nozzles 10 are formed, the pair of guide rollers 23 and the main body portion 24 are unitized as a whole, and the discharge ports of the plurality of discharge nozzles 10 10A is collected in one place.

  In the present embodiment, since the discharge device 1 includes a plurality of discharge nozzles 10 arranged in the relative movement direction Z, fluid is discharged from the slit-like discharge ports 10A of the plurality of discharge nozzles 10 arranged in the relative movement direction Z. F is stably supplied, and uniform wide coating can be realized.

  In the present embodiment, since the plurality of discharge nozzles 10 are arranged not only in the relative movement direction Z but also in the width direction X of the discharge port 10A, the fluid F can be applied with a larger width at a time. Therefore, if the width of the discharge device 1 is designed in accordance with the width of the target object 3, it is possible to complete the entire process on one surface of the target object 3 by one or a small number of relative movement operations. By arranging a plurality of discharge nozzles 10 in the relative movement direction Z and the width direction X of the discharge port 10A, even when the application width that can be applied by one relative movement operation is widened, the discharge unevenness of the fluid F is reduced. A uniform wide coating can be realized.

As shown in FIG. 3, in the present embodiment, the width W1 of the discharge port 10A is preferably designed to be smaller than the width W2 of the fluid reservoir 10C (W1 <W2). With this configuration, it is possible to reduce variation in the discharge amount between the central portion and both end portions of each discharge port 10A, and to realize more uniform wide application.
The width W1 of the discharge port 10A is not particularly limited, and is preferably 5 to 20 mm, for example. Further, the width W1 of the discharge port 10A is preferably 0.7 to 1.0 times the width W2 of the fluid reservoir 10C.

In the coating apparatus of the present embodiment, uniform wide coating can be realized even on the coated surface 3A (3B) held upright in a direction crossing the ground, and both-side coating can be easily performed. Is possible.
The coating apparatus according to the present embodiment includes a holding unit 2 that holds the coated surfaces 3A and 3B in a direction that intersects the ground, and does not require a reversing operation of the target object 3A. By sequentially performing the application of 3B, the double-sided application of the flat object 3 can be easily performed.

  As described above, according to this embodiment, it is possible to provide a coating apparatus capable of performing uniform wide coating. According to the present embodiment, it is also possible to provide a coating apparatus that can easily perform double-side coating of the flat object 3.

"Design changes"
The present invention is not limited to the above-described embodiment, and can be appropriately changed in design without departing from the spirit of the present invention.
For example, the number and arrangement of nozzle forming portions (shims) and discharge nozzles, and the design dimensions thereof can be appropriately changed.

  The coating apparatus of the present invention can be applied to the application of various fluids, and can be preferably used, for example, for the application of viscous fluid such as heat radiation grease to a power element module.

DESCRIPTION OF SYMBOLS 1 Discharge apparatus 2 Holding means 3 Flat object 3A, 3B Coating surface 10 Discharge nozzle 10A Discharge port 10B Flow path 10C Fluid storage part (manifold)
11 Supply pipe 21 1st nozzle formation part (shim)
21X 1st surface 21Y 2nd surface 22 2nd nozzle formation part (shim)
22X 1st surface 22Y 2nd surface 23 Guide roller 24 Main body part 31, 32 Grasping tool F Fluid W1 Discharge port width W2 Fluid storage part (manifold) width X Discharge port width direction Z Vertical descending direction (relative movement) direction)
θ The angle between the first surface and the second surface of the first nozzle forming portion (shim)

Claims (9)

An application device that applies the fluid by moving a discharge device that discharges the fluid relative to the surface to be applied,
The discharge device includes a plurality of discharge nozzles, each having a slit-like discharge port for discharging the fluid, and the discharge ports arranged at least along the direction of relative movement. .   The fluid flow paths connected to the discharge ports provided in the plurality of discharge nozzles arranged so that the discharge ports are arranged along the direction of relative movement have different angles with respect to the surface to be coated. The coating apparatus according to claim 1, wherein   The coating apparatus according to claim 2, wherein the plurality of discharge nozzles arranged such that the discharge ports are arranged along the direction of relative movement are formed in different nozzle formation portions.   The coating apparatus according to claim 1, wherein the plurality of discharge nozzles are arranged such that the discharge ports are aligned along the relative movement direction and the width direction of the discharge ports.   The fluid storage part by which the said fluid is each stored in the said some discharge nozzle is provided, The said discharge port has a width | variety smaller than the said fluid storage part. Coating device.   The coating apparatus according to claim 1, wherein the plurality of discharge nozzles are unitized, and the discharge ports of the plurality of discharge nozzles are collected at one place.   The coating apparatus according to claim 1, wherein the ejection apparatus includes at least one guide roller that moves the ejection apparatus relative to the surface to be coated.   Holding means for standing and holding the coated surface in a direction intersecting the ground, and a direction intersecting the discharge ports of the plurality of discharge nozzles of the discharge device with respect to the coated surface with respect to the ground A coating apparatus according to any one of claims 1 to 7, further comprising a relative moving means for relatively moving the same.   The coating device according to claim 8, wherein the coating device is a device capable of applying the fluid to the application surface formed on both surfaces of a flat object.

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