JP7050563B2 - Coating device and coating method - Google Patents

Description

The present invention relates to a coating device and a coating method, and more specifically, a film is formed on a hole end face or an outer peripheral edge end face formed in a substrate such as a printed wiring board, a plate-shaped resin molded product, or a glass molded product. The present invention relates to a coating apparatus and a coating method capable of coating a forming liquid.

A printed wiring board using a glass epoxy member, a composite member, a paper phenol member, or the like is generally used as a substrate for mounting electronic components. The glass epoxy member is made by impregnating a layer of glass fiber cloth with an epoxy resin. The composite member uses a glass cloth for the surface and a cellulose paper or a non-woven fabric for the interlining. The paper phenol member is made by impregnating kraft paper with a phenol resin. Therefore, when a glass epoxy member, a composite member, or a paper phenol member is cut or pressed, fine dust made of epoxy resin or glass fiber is generated in the cut portion or the hole portion. Such fine dust may cause poor contact of the board circuit and deterioration of quality. Therefore, it is necessary to remove the dust generated when the board is cut at the time of manufacturing the printed wiring board.
However, even if the dust is removed from the end face of the printed wiring board, there is a problem that the end face portion of the printed wiring board is fragile and may collapse to generate further dust.

Therefore, the present inventor has previously proposed a coating device capable of preventing the end face portion from collapsing by applying a film forming liquid to the end face of the printed wiring board to form a film (Patent Document 1).
With the coating apparatus described in Patent Document 1, the film-forming liquid was applied to both end faces of the printed wiring board by the coating disk, and it became possible to form a coating film on both end faces of the printed wiring board.
Furthermore, the present inventors have proposed a coating device and a coating method for applying a film-forming liquid to the end surface of the substrate and the inner surface of the hole of the substrate. (Patent Document 2)
In addition, it is also required to form a coating film on the hole end face and the outer peripheral edge end face of a work such as a plate-shaped resin molded product or a glass molded product.

[Problems to be solved by the invention]
However, in the above-mentioned coating device, droplets of the film-forming liquid may remain on the peripheral portions of the coating portion on the upper surface and the lower surface of the substrate, and in the subsequent production of the printed wiring board or the like, wiring defects in the peripheral portion of the hole portion or the like may occur. There was a problem that it was difficult to eliminate them completely. Further, there has been a demand for an inexpensive coating device having a simple structure for forming a coating film on the hole end face and the outer peripheral edge end face of a work such as a plate-shaped resin molded product or a glass molded product.

International Publication No. 2010/137418 JP-A-2018-0087210

Means for solving problems and their effects

The present invention has been made in view of the above problems, and in a substrate such as a printed wiring board, it is possible to prevent wiring defects in the peripheral portion of the hole due to the formation of a coating film, and to form a plate-shaped resin. It is possible to form a coating film on the hole end face and outer peripheral edge end face of workpieces such as products and glass molded products, and with a simple structure and inexpensive equipment, it is possible to reliably and efficiently cover the coated surface at low cost. It is an object of the present invention to provide a coating device capable of coating a film forming liquid and a coating method.

In order to achieve the above object, the coating device (1) according to the present invention is
An upper surface masking plate that masks the upper surface of the work and a lower surface masking plate that masks the lower surface of the work are provided except for the end surface of the hole portion and the end surface of the outer peripheral edge portion of the work.
A work masking set is formed by sandwiching the work and the upper surface masking plate and the lower surface masking plate.
The upper mold provided with the film forming liquid supply part and the lower mold provided with the film forming liquid discharging part surround the work masking set and are configured to form the film forming liquid filling part. It is characterized by.

According to the coating device (1), the structure of the coating device is simple, and the work masking set is immersed in the film-forming liquid in the film-forming liquid filling portion, and the hole end surface and the outer peripheral edge portion end surface of the work are immersed. On the other hand, the film-forming liquid is applied. Therefore, the film-forming liquid can be applied efficiently, reliably, and quickly at low cost. Further, since it is possible to prevent the film forming liquid from being applied to the upper surface and the lower surface of the peripheral edge of the hole, it is extremely effective in preventing wiring defects in the peripheral edge of the hole, especially in a substrate such as a printed wiring board. be.

Further, the coating device (2) according to the present invention is the above-mentioned coating device (1).
The lower surface masking plate is fixed to the lower mold, and the upper surface masking plate is supported by the upper mold.
According to the coating device (2), the work can be placed on the lower surface masking plate fixed to the lower mold, and the work can be masked by the upper surface masking plate supported by the upper mold. The film-forming liquid can be applied to each end face of the work by repeating loading and unloading of the work to and from the upper mold. Therefore, the film-forming liquid can be applied to the work extremely efficiently.

Further, the coating device (3) according to the present invention is the above-mentioned coating device (1) or (2).
The upper surface masking plate and the lower surface masking plate are characterized in that a masking gasket is provided on the peripheral edge portion of the hole on the surface on the work side and the outer peripheral edge portion.
According to the coating device (3), since the masking gasket is provided at the position corresponding to the peripheral edge portion of the hole portion and the outer peripheral edge portion of the work, the film-forming liquid permeates into the upper surface and the lower surface of the work. Can be reliably prevented. Therefore, in particular, in a substrate such as a printed wiring board, it is possible to effectively prevent wiring defects in the peripheral portion of the hole.

Further, the coating device (4) according to the present invention is the above-mentioned coating device (1) or (2).
The upper surface masking plate and the work side surface of the lower surface masking plate are provided with a sheet-shaped gasket having an opening corresponding to a hole in the work.
According to the coating device (4), since the sheet-shaped gasket is provided, it is possible to reliably prevent the film-forming liquid from seeping into the upper surface and the lower surface of the work. Therefore, in particular, in a substrate such as a printed wiring board, it is possible to effectively prevent wiring defects in the peripheral portion of the hole. It also has the advantage that the gasket can be easily replaced.

Further, the coating device (5) according to the present invention is the above-mentioned coating device (1) to (4) in any of the above-mentioned coating devices (1) to (4).
Further, it is provided with an on-off valve provided in the supply section, a membrane forming liquid tank connected to the on-off valve, or a switching cock to the intake section, and is connected to the on-off valve provided in the discharge section and the on-off valve. It is characterized by being provided with a gas-liquid separation tank and a suction device connected to the gas-liquid separation tank.
According to the coating device (5), the suction device is used to remove dust in the system before coating the film-forming liquid, to introduce the film-forming liquid into the coating device, and to apply the film-forming liquid to the work. Since it is possible to remove the film-forming liquid and accelerate the drying, it is possible to apply a high-quality film-forming liquid to each end face of the work, and it is possible to efficiently apply the film-forming liquid. can.

Further, the coating device (6) according to the present invention is the above-mentioned coating device (1) to (4) in any of the above-mentioned coating devices (1) to (4).
Further, it is connected to an on-off valve provided in the supply unit, a membrane-forming liquid tank and an air supply unit connected to the on-off valve, a switching cock connected to the membrane-forming liquid tank and the air supply unit, and the switching cock. It is characterized by being provided with a pressurizing device, an on-off valve provided in the discharge portion, and a drainage tank connected to the on-off valve.
According to the coating device (6), the pressurizing device is used to remove dust in the system before coating the film forming liquid, to introduce the film forming liquid into the coating device, and to introduce the film forming liquid into the coating device. Since it is possible to pressurize the film-forming liquid, remove unnecessary film-forming liquid applied to the work, and accelerate drying, it is possible to apply a high-quality film-forming liquid to each end face of the work. In addition to being able to do this, the film-forming liquid can be applied efficiently.

Further, the upper surface masking plate and / or the lower surface masking plate according to the present invention is characterized in that it is used in any of the above-mentioned coating devices (1) to (6).
According to the upper surface masking plate and / or the lower surface masking plate, the masking plate can be replaced at any time according to the wear of the upper surface masking plate and / or the lower surface masking plate, so that an efficient and reliable film can be obtained. The forming liquid can be applied.

Further, the sheet-shaped gasket according to the present invention is characterized in that it is used in the above-mentioned coating device (4).
According to the sheet-shaped gasket, the gasket can be replaced at any time according to the wear and the like of the sheet-shaped gasket, so that the film-forming liquid can be applied efficiently and reliably.

The coating method (1) according to the present invention is
A coating method using any of the above coating devices (1) to (6).
The work is placed on the lower surface masking plate arranged in the lower mold.
The work masking set is formed by placing the upper surface masking plate supported by the upper mold on the work, and the film forming liquid filling portion is formed by the upper mold and the lower mold. death,
By introducing the film-forming liquid from the supply part, the film-forming liquid is filled in the film-forming liquid filling part, the film-forming liquid is applied to each end face of the work, and then the film is discharged from the discharge part. Drain the forming liquid,
It is characterized in that the upper mold is raised and the work is taken out.

According to the coating method (1), the upper surface masking plate and the lower surface masking plate can be repeatedly used for each work without replacing the upper surface masking plate and the lower surface masking plate. Therefore, the film-forming liquid can be applied to the work continuously and with high efficiency.

Further, the coating method (2) according to the present invention is the above-mentioned coating method (1).
After discharging the film-forming liquid, drying air is further flowed into the film-forming liquid filling section via the supply section, and the film is discharged from the discharging section.
According to the coating method (2), there is an advantage that after coating / discharging the film-forming liquid, unnecessary film-forming liquid can be quickly and effectively removed / dried in the coating device.

It is a figure which shows an example of the printed wiring board for mounting an electronic component which is an example of the workpiece which is the object of this invention, (a) is a plan view, (b) is a sectional view. It is sectional drawing which shows the basic structure of the coating apparatus which concerns on embodiment. It is a figure explaining the flow of the film forming liquid in the coating apparatus which concerns on embodiment. It is a perspective view which shows an example of the masking plate which comprises the coating apparatus which concerns on embodiment. It is sectional drawing which shows an example of the step of continuously coating a film-forming liquid by using the coating apparatus which concerns on embodiment, (a) is the state before the work is carried into the coating apparatus, (b). ) Shows the state before the work masking set is formed and the film-forming liquid is introduced, and (c) shows the state where the film-forming liquid is filled in the coating device. It is sectional drawing which shows the coating process of the film-forming liquid using the coating apparatus which concerns on embodiment, (d) is the state which the film-forming liquid was discharged from the coating apparatus, (e) is carried out from the coating apparatus. The state before the work, (f) shows the state after the work is carried out from the coating device. It is a system block diagram which shows an example of the coating system which uses the coating apparatus which concerns on embodiment. It is a system block diagram which shows another example of the coating system which uses the coating apparatus which concerns on embodiment.

Hereinafter, the coating apparatus according to the embodiment of the present invention will be specifically described with reference to the drawings.
FIG. 1 is a diagram showing an example of a printed wiring board (hereinafter referred to as a work) for mounting an electronic component, which is an example of a work targeted by the present invention, where FIG. 1A is a plan view and FIG. 1B is a plan view. It is sectional drawing in the XX line shown in (a).
The work 10 has six holes 11, 12, 13, 14, 15, and 16, and a film is formed on the end faces 11a, 12a, 13a, 14a, 15a, 16a of the respective holes and the end face 17a of the outer peripheral edge portion 17. The forming liquid is applied.

FIG. 2 is a cross-sectional view showing a basic configuration of the coating device according to the embodiment. The coating device 1 includes an upper surface masking plate 21 that masks the upper surface of the work 10 and a hole portion of the work 10 except for the hole end faces 11a, 12a, 13a, 14a, 15a, 16a and the outer peripheral edge portion 17a of the work 10. Except for the end faces 11a, 12a, 13a, 14a, 15a, 16a, and the end face 17a of the outer peripheral edge portion 17, a lower surface masking plate 26 for masking the lower surface of the work 10 is provided.
Further, the work masking set 20 is formed by sandwiching the work 10 with the upper surface masking plate 21 and the lower surface masking plate 26, and the upper mold 31 provided with the film forming liquid supply unit 32 and the film forming liquid discharging unit 37 are provided. The coating device 1 is configured by surrounding the work masking set 20 with the provided lower mold 36 and forming the film forming liquid filling portion 39.

Reference numerals 28 and 29 are an outer peripheral edge gasket and a hole peripheral edge gasket, which will be described with reference to FIG.
Further, as described with reference to FIG. 5, it is preferable that the lower surface masking plate 26 is fixed to the lower mold 36 and the upper surface masking plate 21 is supported by the upper mold 31.

FIG. 3 is a diagram illustrating a flow of the film-forming liquid in the coating device 1 according to the embodiment, and is a schematic cross-sectional view showing a mechanism of applying the film-forming liquid to the work 10. The film-forming liquid is introduced into the coating device 1 from the supply unit 32 side of the upper mold 31, and is filled in the film-forming liquid filling unit 39 of the coating device 1. After the film-forming liquid is applied to each end surface of the work 10, it is discharged from the discharge portion 37 side of the lower mold 36.
While the film-forming liquid is filled in the film-forming liquid filling portion 39, the film-forming liquid is applied to the work 10 arranged in the work masking set 20. That is, the film-forming liquid comes into contact with each of the hole end faces 11a, 12a, 13a, 14a, 15a, 16a, and the outer peripheral edge end face 17a of the work 10, whereby the film-forming liquid is applied.
While the film-forming liquid is filled in the film-forming liquid filling portion 39 of the coating device 1, the film-forming liquid in the film-forming liquid filling portion 39 is pressurized to further enhance the coating effect of the film-forming liquid. You can also.

The upper surface masking plate 21 and the lower surface masking plate 26 are used for masking on the peripheral edges of the holes 11, 12, 13, 14, 15, and 16 and the outer peripheral edge 17 on the surface on the work 10 side, as will be described later. It is preferable to have a gasket.

FIG. 4 is a perspective view showing an example of a masking plate constituting the coating device according to the embodiment, and shows the lower surface masking plate 26. The lower surface masking plate 26 has the same size as the work 10, and has openings corresponding to the holes 11, 12, 13, 14, 15, and 16 of the work 10. Further, the lower surface masking plate 26 is composed of a pressing plate 27, an outer peripheral edge gasket 28 formed on the pressing plate 27 surface, and a hole peripheral peripheral gasket 29.
The pressing plate 27 acts as a pressing member that allows the film-forming liquid to flow to each end surface of the work 10 through the opening of the pressing plate 27 and brings the lower surface masking plate 26 into contact with the surface of the work 10 without gaps. Is to do. In order to obtain the effect, it is preferable to use a metal such as aluminum, which is a material having low deformability, and a resin such as polycarbonate, acrylic, and ABS for the holding plate 27, and the thickness thereof also matches the size of the work 10. It is preferable to select an appropriate one.

Further, the outer peripheral edge gasket 28 and the hole peripheral peripheral gasket 29 provided on the holding plate 27 prevent the film-forming liquid from infiltrating into the outer peripheral edge portion end surface of the work 10 and the surface other than the hole end surface. It has a great effect on.
The outer peripheral edge gasket 28 and the hole peripheral edge gasket 29 are generally used synthetic rubber, natural rubber, and the like, and can be formed by a gasket application device.
FIG. 4 shows an example of the lower surface masking plate 26, but the upper surface masking plate 21 is only upside down and has the same other configurations.

Further, FIG. 4 shows an example of the lower surface masking plate 26 composed of the holding plate 27, the outer peripheral gasket 28, and the hole peripheral peripheral gasket 29, but the upper surface masking plate 21 and the lower surface masking plate 26 are shown. A gasket other than the type in which the gasket is formed only on the outer peripheral edge and the peripheral edge of the hole may be used.

For example, the work masking set 20 includes a sheet-like gasket having an opening corresponding to a hole in the work 10 between the upper surface masking plate 21 and the work 10 and between the lower surface masking plate 26 and the work 10. It may be the one that exists. That is, the upper surface masking 21 and the lower surface masking plate 26 are of a type composed of a combination of a pressing plate 27 and a sheet-shaped gasket.
The gasket in this case is an elastic sheet such as synthetic rubber or natural rubber having the same opening as the holding plate 27, that is, the same hole as the work 10. The sheet-shaped gasket can be easily manufactured by punching or the like.

As for the upper mold 31 and the lower mold 36, as will be described later, the film-forming liquid in the film-forming liquid filling portion 39 may be pressurized, and the inside of the film-forming liquid filling portion 39 may be depressurized. From the viewpoint of being present, it has strength to withstand pressurization and depressurization, and can prevent air and film forming liquid from leaking to the portion where the lower end of the upper mold 31 and the upper end of the lower mold 36 are in contact with each other. It is preferable to have a gasket.
Further, the upper mold 31 and the lower mold 36 have transparency so that the inside can be observed, and it is preferable that the upper mold 31 and the lower mold 36 are made of a resin such as polycarbonate, acrylic, or a transparent ABS resin.

5 and 6 are cross-sectional views showing an example of a step of continuously applying the film-forming liquid by using the coating device according to the embodiment, and FIG. 5A shows a work piece on the coating device. FIG. 5 (b) shows a state in which the work masking set is formed and the film forming liquid is introduced, and FIG. 5 (c) shows a state in which the film forming liquid is filled in the coating device. (D) is a state in which the film forming liquid is discharged from the coating device, FIG. 6 (e) is a state before the work is carried out from the coating device, and FIG. 6 (f) is a state after the work is carried out from the coating device. Indicates the state of.

As shown in FIG. 5A, the upper surface masking plate 21 is supported by the upper mold 31 by the upper surface masking plate support member 22a fixed to the inner ceiling portion of the upper mold 31. Further, the lower surface masking plate 26 is supported by the lower surface masking plate support member 22b fixed to the bottom of the lower mold 36 in a state of being aligned with the upper surface masking plate 21.
With the upper die 31 located above the lower die 36, the work 10 is carried into the coating device 1 from the right direction of FIG. 5A and set on the lower surface masking plate 26.

Next, as shown in FIG. 5B, the upper mold 31 is lowered, and the work masking set 20 is formed by the upper surface masking plate 21, the work 10, and the lower surface masking plate 26. At the same time, the coating device 1 in which the film-forming liquid filling portion 39 is formed is configured by being surrounded by the upper mold 31 and the lower mold 36.
After the form of the coating device 1 is completed, as shown in FIG. 5C, the opening / closing valve 32a on the supply unit 32 side is opened with the opening / closing valve 37a on the discharge unit 37 side closed, and the coating device 1 is opened. A film-forming liquid is introduced therein, and the film-forming liquid filling portion 39 is filled with the film-forming liquid. In this case, the air is evacuated from the film-forming liquid filling portion 39 before or at the time of introducing the film-forming liquid.
As will be described later, this air bleeding may be performed by keeping the inside of the membrane-forming liquid filling portion 39 in a vacuum state when the membrane-forming liquid is introduced by the depressurization method, and when the membrane-forming liquid is introduced by the pressure-reducing method. An on-off valve for venting air may be provided on the upper part of the upper die 31.

After the film-forming liquid is sufficiently applied to each end face of the hole portion of the work 10 and the end face of the outer peripheral edge portion, as shown in FIG. 6D, the opening / closing valve 32a on the supply portion 32 side is closed and discharged. The on-off valve 37a on the portion 37 side is opened, and the film-forming liquid is discharged from the inside of the coating device 1.
After the film-forming liquid is discharged from the coating device 1, the upper die 31 is raised and the upper surface masking plate 21 is removed from the work 10 as shown in FIG. 6 (e).
Next, as shown in FIG. 6 (f), the work 10 is carried out from the coating device 1 to complete the application of the film-forming liquid to each end face of the work 10.

By the above steps, it is possible to apply the film-forming liquid to each end face of the work 10 by the coating device 1 including the work masking set 20. In particular, the upper surface masking plate 21 and the lower surface masking plate 26 can be used repeatedly without replacing the upper surface masking plate 21 and the lower surface masking plate 26 for each work 10. Therefore, by the above steps (a) to (f), the film-forming liquid can be continuously applied to the work 10 with high efficiency.

When the film forming liquid is applied by the coating device 1, in the work masking set 20, the lower surface masking plate 26 is supported by the lower surface masking plate support member 22b fixed to the lower mold 36, and the upper surface masking plate 21 is the upper mold. It is supported by the upper surface masking plate support member 22a fixed to 31.
The work 10 is masked by being sandwiched between the lower surface masking plate 26 supported in this way and the upper surface masking 21. Therefore, in order to reliably mask the surface of the work 10, the space between the upper surface masking plate 21 and the lower surface masking plate 26 is pressed to such an extent that the film forming liquid can be prevented from seeping into the upper surface and the lower surface of the work 10. Is preferable.

Therefore, it is preferable that both the upper surface masking plate support member 22a and the lower surface masking plate support member 22b, or at least one of them, is made of elastic rubber or the like. The upper surface masking plate support member 22a and the lower surface masking plate support member 22b may be block-shaped to support the upper surface masking plate 21 and the lower surface masking plate 26 at four points, respectively.

The film-forming liquid filling portion 39 in the coating device 1 is filled with the film-forming liquid. Further, the film-forming liquid of the film-forming liquid filling portion 39 may be pressurized so that the film-forming liquid is surely applied to each end surface of the work 10. Therefore, it is preferable that the film forming liquid is pressed through the gasket between the outer frame portion 31a of the upper mold 31 and the outer frame portion 36b of the lower mold 36 so as not to leak from the coating device 1.

When the film-forming liquid filling portion 39 in the coating device 1 is filled with the film-forming liquid, the film-forming liquid is introduced from the supply unit 32 side with the on-off valve 37a on the discharge unit 37 side closed. In this case, it is necessary to remove the air in the film forming liquid filling portion 39.
As one of the methods, there is a method of providing a valve for venting air on the upper part of the upper die 31. That is, it is a method of removing air from the film-forming liquid filling portion 39 until the filling of the film-forming liquid into the film-forming liquid filling portion 39 is completed.

Further, as another method, there is a method of vacuum exhausting the inside of the film forming liquid filling portion 39. In this case, a vacuum exhaust system is connected to the discharge unit 37, the open / close valve 32a on the supply unit 32 side is closed, and vacuum exhaust is performed from the discharge unit 37 side. With the membrane-forming liquid filling portion 39 evacuated, the on-off valve 37a on the discharge portion 37 side is closed, the on-off valve 32a on the supply portion 32 side is opened, and the membrane-forming liquid is introduced into the membrane-forming liquid filling portion 39.

Although not shown in FIGS. 5 and 6, the work 10 is carried in and set on the lower surface masking plate 26 in the coating device 1, and the work 10 is carried out from the coating device 1 after the film forming liquid is applied. For example, a suction holding type loading / unloading device can be used. One example is an arm with a vacuum suction pad at the tip. By operating such an arm, the work 10 can be carried in and out of the coating device 1.

5 and 6 show an example in which the lower surface masking plate 26 is fixed to the lower mold 36 and the upper surface masking plate 21 is supported by the upper mold 31, but the lower surface masking plate 26 is the lower mold 36 and the upper surface masking plate. 21 may not be fixed or supported by the upper mold 31.
The work masking set 20 is configured in advance by the lower surface masking plate 26, the work 10, and the upper surface masking 21, and after the work masking set 20 is placed on the lower mold 36, the upper mold 31 is superposed on the lower mold 36. Therefore, the coating device 1 may be used.
In this case, a plurality of work masking sets 20 are prepared, and by repeating loading and unloading of the work masking set 20 between the lower mold 36 and the upper mold 31, each end of the work 10 is continuously carried out. Apply the film-forming solution to the part.

FIG. 7 is a system configuration diagram showing an example of a coating system using the coating apparatus according to the embodiment.
In the case of the coating system 40 shown in FIG. 7, the on-off valve 32a provided in the supply portion 32 of the coating device 1, the film forming liquid tank 41 connected to the on-off valve 32a, or the switching cock 43 to the intake portion 42 is provided. It also includes an on-off valve 37a provided in the discharge section 37, a gas-liquid separation tank 44 connected to the on-off valve 37a, and a suction device 45 connected to the gas-liquid separation tank 44.

When the film-forming liquid is applied to the work 10 by the coating system 40, the film-forming liquid introduced from the supply unit 32 is filled in the film-forming liquid filling unit 39 by vacuum suctioning the inside of the coating device 1. The film-forming liquid is applied to each end face of the work 10. After that, the film-forming liquid is sucked and discharged by the discharge unit 37.

The coating system 40 includes a coating device 1, a film forming liquid tank 41, an intake unit 42, a three-way cock 43, a trap tank 44, and a suction device 45, and an intake unit is provided between the film forming liquid tank 41 and the three-way cock 43. The hoses 46a, 46b, 46c are between the three-way cock 43 and the three-way cock 43, between the three-way cock 43 and the coating device 1, between the coating device 1 and the trap tank 44, and between the trap tank 44 and the suction device 45, respectively. , 46d, 46e. The suction device 45 is, for example, a vacuum pump, an ejector, or the like.

The film-forming liquid is stored in the film-forming liquid tank 41. The intake unit 42 is an air suction unit and includes a filter for purifying air. The three-way cock 43 functions to switch between the film-forming liquid sent to the coating device 1 and air. The trap tank 44 is a tank that has a gas-liquid separation function that prevents the membrane-forming liquid from flowing into the suction device 45 and traps the membrane-forming liquid. The coating device 1 is in the state shown in FIG. 5 (b).

When applying the film-forming liquid to each end surface of the work 10 set in the coating device 1, first, the suction device 45 is operated with the supply section 32 and the discharge section 37 open, and the three-way cock 43 is sucked. By setting it on the portion 42 side, dust and the like in the system are sucked out. Next, the three-way cock 43 is closed and vacuum suction is performed to vacuum exhaust the exhaust system including the film-forming liquid filling portion 39 of the coating device 1. After that, the discharge portion 37 is closed, the three-way cock 43 is set on the film forming liquid tank 41 side, and the film forming liquid is introduced into the film forming liquid filling portion 39 of the coating device 1. By maintaining the state in which the film-forming liquid filling portion 39 is filled with the film-forming liquid, the film-forming liquid is applied to each end face of the work 10 (see FIG. 5 (c)).

After the film-forming liquid is applied to each end surface of the work 10, the three-way cock 43 is set on the intake portion 42 side, the discharge portion 37 is opened to perform suction, and the film-forming liquid in the system is poured into the trap tank 44. , The film-forming liquid in the film-forming liquid filling portion 39 is discharged (see FIG. 6D).
Further, the vacuum may be continued by a suction device 45 such as a vacuum pump. As a result, unnecessary film-forming liquid that may remain in the coating device 1 can be discharged, and the drying of the coating film on each end surface of the work 10 can be accelerated.
In this way, by using the coating system 40, the film-forming liquid supplied from the supply unit 32 can be sucked on the discharge unit 37 side, so that the film-forming liquid can be applied to each end surface of the work 10.

FIG. 8 is a system configuration diagram showing another example of a coating system using the coating apparatus according to the embodiment.
FIG. 7 shows an example in which the film-forming liquid is introduced into the coating device 1 by vacuum suction using a suction device 45 such as a vacuum pump, but as shown in FIG. 8, pressurization is performed. Therefore, the film forming liquid may be introduced into the coating device 1.

In the case of the coating system 50 shown in FIG. 8, the on-off valve 32a provided in the supply unit 32, the film-forming liquid tank 51 and the air supply unit 55 connected to the on-off valve 32a, the film-forming liquid tank 51 and the air supply A switching cock 53 connected to the switching cock 53, a pressurizing device 52 connected to the switching cock 53, an on-off valve 37a provided on the discharging portion 37, and a drainage tank 54 connected to the on-off valve 37a are provided. There is.
When the film-forming liquid is applied to the work 10 by the coating system 50, the film-forming liquid is press-fitted from the supply unit 32 of the coating device 1 to fill the film-forming liquid filling unit 39 with the film-forming liquid and work. The film-forming liquid is applied to each end face of 10.

The coating system 50 includes a coating device 1, a film forming liquid tank 51, a pressurizing device 52, a three-way cock 53, a drainage tank 54, and an air supply unit 55, and is provided between the pressurizing device 52 and the three-way cock 53. Between the three-way cock 53 and the film-forming liquid tank 51, between the three-way cock 53 and the air supply unit 55, between the film-forming liquid tank 51 and the coating device 1, and between the air supply unit 55 and the coating device 1. The coating device 1 and the drainage tank 54 are connected by hoses 56a, 56b, 56c, 56d, 56e, and 56f, respectively.

The film-forming liquid is stored in the film-forming liquid tank 51. The pressurizing device 52 is a device that pressurizes the inside of the film forming liquid tank 51, and is a compression device such as an air compressor that can pressurize the film forming liquid to the extent that it can be sent to the coating device 1. The pressurizing device 52 also serves to send air to the coating device 1 via an air supply unit 55 provided with a filter for air purification and a valve for intake (not shown). The three-way cock 53 functions to switch between the introduction of the film-forming liquid into the coating device 1 and the introduction of air. The drainage tank 54 is a tank that receives the film-forming liquid drained from the coating device 1. The coating device 1 is in the state shown in FIG. 5 (b).

When applying the film-forming liquid to each end surface of the work 10 set in the coating device 1, first, the three-way cock 53 is fed with the opening / closing valve 32a of the supply unit 32 and the opening / closing valve of the discharge unit 37 open. By setting it on the air portion 55 side, operating the pressurizing device 52, and compressing the air in the air supply portion 55, dust and the like in the system are discharged. Next, the opening / closing valve 37a of the discharge portion 37 is closed, the three-way cock 53 is set on the membrane forming liquid tank 51 side, and the inside of the membrane forming liquid tank 51 is pressurized. The film-forming liquid extruded by pressurization is introduced into the film-forming liquid filling portion 39 of the coating device 1. By maintaining the state in which the film-forming liquid filling portion 39 is filled with the film-forming liquid, the film-forming liquid is applied to each end face of the work 10 (see FIG. 5 (c)).
In order to sufficiently apply the film-forming liquid to each end face of the work 10, it is preferable to maintain the film-forming liquid in a state of being filled with the film-forming liquid for a certain period of time and to maintain a pressurized state.
The coating device 1 is provided with a valve for venting air to discharge the air in the film-forming liquid filling portion 39 when the film-forming liquid is introduced.

After the film-forming liquid is applied to each end surface of the work 10 in the coating device 1, the opening / closing valve 37a of the discharge section 37 of the coating device 1 is opened, the three-way cock 53 is switched to the air supply section 55 side, and the air supply section is switched. Air is sent into the coating device 1 via 55, and the film-forming liquid in the film-forming liquid filling portion 39 is discharged (see FIG. 6D). Further, by continuing the air supply, the drying of the film-forming liquid applied to each end face of the work 10 may be promoted.
In the case of the coating system 50 shown in FIG. 8, the film-forming liquid filled in the film-forming liquid filling portion 39 of the coating device 1 can be pressurized. Therefore, there is an advantage that the film-forming liquid can be more reliably applied to each end surface of the work 10.

As described above, there are several methods for applying to each end face of the work 10 by the application device 1. It is preferable to appropriately select the work 10 in consideration of conditions such as the size of the work 10, the length and size of the flow path in the coating device 1, and the amount of the work 10 to be processed.

The coating device according to the embodiment has been described above for the work 10 shown in FIG. The work includes a printed wiring board and the like, and the form of the work varies in size, thickness, number and shape of holes, and the like. In addition to the commonly used printed wiring boards such as glass epoxy resin, composite member, and paper phenol member, there are various molded products such as plate-shaped resin and glass. Also included in the work targeted by the present invention.
Further, in the case of a small object, the film forming liquid can be applied to the plurality of works at the same time by setting a plurality of works which are the objects in one set of work masking sets.

As described with reference to FIGS. 5 to 8, the coating method using the coating device 1 is summarized as follows.
That is, the work masking set is made by placing the work 10 on the lower surface masking plate 26 arranged in the lower mold 36 and placing the upper surface masking plate 21 supported by the upper mold 31 on the work 10. 20 is formed, and the film-forming liquid filling portion 39 is formed by the upper mold 31 and the lower mold 36, and the film-forming liquid is introduced from the supply unit 32 into the film-forming liquid filling portion 39. After filling and applying the film-forming liquid to each end face of the work 10, the film-forming liquid is discharged from the discharge portion 37, the upper mold 31 is raised, and the work 10 is taken out.
After discharging the film-forming liquid, it is preferable that drying air is further flowed into the film-forming liquid filling unit 39 via the supply unit 32 and discharged from the discharge unit 37.

As described above, according to the coating device and the coating method according to the embodiment of the present invention, the work masking set is in a state of being immersed in the film forming liquid in the film forming liquid filling portion of the coating device, and the work is in that state. The film-forming liquid is applied to the end face of the hole portion and the end face of the outer peripheral edge portion. Therefore, the film-forming liquid is applied efficiently, reliably, and quickly. Further, since the work masking set prevents the film forming liquid from being applied to the upper surface and the lower surface of the peripheral edge of the hole, it is effective in preventing wiring defects in the peripheral edge of the hole, especially in a substrate such as a printed wiring board. It is a target.
Further, the upper surface masking plate and the lower surface masking plate can be repeatedly used for each work without replacing the upper surface masking plate and the lower surface masking plate. Therefore, there is an advantage that the film-forming liquid can be applied to the work continuously and with high efficiency.
In addition, the coating apparatus according to the embodiment of the present invention has advantages that the configuration is simple and the price is low.

Although the embodiments of the present invention have been described in detail above, the above description is merely an example of the present invention. It goes without saying that various improvements and changes can be made without departing from the scope of the present invention, and these are also included in the scope of the present invention.

1 Coating device 10 Work 11, 12, 13, 14, 15, 16 Holes 11a, 12a, 13a, 14a, 15a, 16a Hole end surface 17 Outer peripheral edge 17a Outer peripheral edge end surface 20 Work masking set 21 Top surface masking plate 22a Top surface masking plate support member 22b Bottom surface masking plate support member 26 Bottom surface masking plate 27 Pressing plate 28 Outer peripheral edge gasket 29 Hole peripheral edge gasket 31 Upper die 31a, 36a Outer frame portion 32 Supply section 32a, 37a Open / close valve 36 Lower die 37 Discharge section 39 Film forming liquid filling part 40, 50 Coating system 41, 51 Film forming liquid tank 42 Intake part 43, 53 Three-way cock 44 Trap tank 45 Suction device 46a, 46b, 46c, 46d, 46e, 56a, 56b, 56c, 56d, 56e, 56f Hose 52 Pressurizing device 54 Drainage tank 55 Air supply unit

Claims (13)

An upper surface masking plate that masks the upper surface of the work and a lower surface masking plate that masks the lower surface of the work are provided except for the end surface of the hole portion and the end surface of the outer peripheral edge portion of the work.
A work masking set is formed by sandwiching the work and the upper surface masking plate and the lower surface masking plate.
The upper mold provided with the film forming liquid supply portion and the lower mold provided with the film forming liquid discharging portion surround the work masking set to form a film forming liquid filling portion .
A coating device comprising a masking gasket on the upper surface masking plate, the hole peripheral portion of the work side surface of the lower surface masking plate, and the outer peripheral edge portion . An upper surface masking plate that masks the upper surface of the work and a lower surface masking plate that masks the lower surface of the work are provided except for the end surface of the hole portion and the end surface of the outer peripheral edge portion of the work.
A work masking set is formed by sandwiching the work and the upper surface masking plate and the lower surface masking plate.
The upper mold provided with the film forming liquid supply portion and the lower mold provided with the film forming liquid discharging portion surround the work masking set to form a film forming liquid filling portion.
A coating device comprising a sheet-shaped gasket having an opening corresponding to a hole in the work on the work-side surface of the upper surface masking plate and the lower surface masking plate. Further, it is provided with an on-off valve provided in the supply section, a film forming liquid tank connected to the on-off valve, or a switching cock to the intake section, and is connected to the on-off valve provided in the discharge section and the on-off valve. The coating device according to claim 1 or 2 , further comprising a gas-liquid separation tank and a suction device connected to the gas-liquid separation tank. Further, it is connected to an on-off valve provided in the supply section, a film-forming liquid tank and an air supply section connected to the on-off valve, a switching cock connected to the film-forming liquid tank and the air supply section, and the switching cock. The coating device according to claim 1 or 2 , further comprising a pressurizing device, an on-off valve provided in the discharge section, and a drainage tank connected to the on-off valve. An upper surface masking plate that masks the upper surface of the work and a lower surface masking plate that masks the lower surface of the work are provided except for the end surface of the hole portion and the end surface of the outer peripheral edge portion of the work.
A work masking set is formed by sandwiching the work and the upper surface masking plate and the lower surface masking plate.
The upper mold provided with the film forming liquid supply portion and the lower mold provided with the film forming liquid discharging portion surround the work masking set to form a film forming liquid filling portion.
Further, it is provided with an on-off valve provided in the supply section, a membrane forming liquid tank connected to the on-off valve, or a switching cock to the intake section, and is connected to the on-off valve provided in the discharge section and the on-off valve. A coating device including a gas-liquid separation tank and a suction device connected to the gas-liquid separation tank. An upper surface masking plate that masks the upper surface of the work and a lower surface masking plate that masks the lower surface of the work are provided except for the end surface of the hole portion and the end surface of the outer peripheral edge portion of the work.
A work masking set is formed by sandwiching the work and the upper surface masking plate and the lower surface masking plate.
The upper mold provided with the film forming liquid supply portion and the lower mold provided with the film forming liquid discharging portion surround the work masking set to form a film forming liquid filling portion.
Further, it is connected to an on-off valve provided in the supply unit, a membrane-forming liquid tank and an air supply unit connected to the on-off valve, a switching cock connected to the membrane-forming liquid tank and the air supply unit, and the switching cock. A coating device including a pressurizing device, an on-off valve provided in the discharge portion, and a drainage tank connected to the on-off valve. The coating apparatus according to any one of claims 1 to 6, wherein the lower surface masking plate is fixed to the lower mold, and the upper surface masking plate is supported by the upper mold. An upper surface masking plate and / or a lower surface masking plate used in the coating apparatus according to claim 1.
An upper surface masking plate and / or a lower surface, characterized in that a masking gasket is provided on the hole peripheral edge portion and the outer peripheral edge portion of the work side surface of the upper surface masking plate and / or the lower surface masking plate. Masking plate. An upper surface masking plate and / or a lower surface masking plate used in the coating apparatus according to claim 2.
An upper surface masking plate and / or a top surface masking plate characterized by having a sheet-shaped gasket having an opening corresponding to a hole of the work on the work side surface of the upper surface masking plate and / or the lower surface masking plate. Or the bottom surface masking plate. A sheet-shaped gasket characterized by being used in the coating apparatus according to claim 2 . An upper surface masking plate that masks the upper surface of the work and a lower surface masking plate that masks the lower surface of the work are provided except for the end surface of the hole portion and the end surface of the outer peripheral edge portion of the work.
A work masking set is formed by sandwiching the work and the upper surface masking plate and the lower surface masking plate.
A coating configured to surround the work masking set and form a film-forming liquid filling section by an upper die with a film-forming fluid supply and a lower die with a film-forming fluid drain. It is a coating method using a device,
The work is placed on the lower surface masking plate arranged in the lower mold.
The work masking set is formed by placing the upper surface masking plate supported by the upper mold on the work, and the film forming liquid filling portion is formed by the upper mold and the lower mold. death,
By introducing the film-forming liquid from the supply part, the film-forming liquid is filled in the film-forming liquid filling part, the film-forming liquid is applied to each end face of the work, and then the film is discharged from the discharge part. Drain the forming liquid,
A painting method comprising raising the upper mold and taking out the work. A coating method using the coating apparatus according to any one of claims 1 to 7.
The work is placed on the lower surface masking plate arranged in the lower mold.
The work masking set is formed by placing the upper surface masking plate supported by the upper mold on the work, and the film forming liquid filling portion is formed by the upper mold and the lower mold. death,
By introducing the film-forming liquid from the supply part, the film-forming liquid is filled in the film-forming liquid filling part, the film-forming liquid is applied to each end face of the work, and then the film is discharged from the discharge part. Drain the forming liquid,
A painting method comprising raising the upper mold and taking out the work. 11 . The described painting method.

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