JP2000354821A - Application apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an applicator which can supply air uniformly to a plate to be coated and cure varnish enough by the end of drying. SOLUTION: An apparatus comprises a vertical varnish applicator which supplies a printed-wiring substrate 7 between application rolls of a pair and applies varnish 78, a suspension conveyer 3 which holds the substrate 7 pushed out above from the applicator and conveyes the suspended substrate 7, and a dryer 64 which supplies air from above to the substrate 7 being conveyed. The conveyer 3 comprises a pair of suspension chucks 32 for holding the right end part 74 and the left end part 73 of the substrate 7 and a jig plate 31 which fixed the chucks 32. The jig plate 31, at least between the chucks, has a middle part 311 the plate width P of which is 0.5-7 times as large as the thickness T of the substrate 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating apparatus for applying a varnish to a plate to be coated such as a printed wiring board.

[0002]

2. Description of the Related Art In a coating equipment for applying a varnish to a plate to be coated such as a printed wiring board, there is a case where after the varnish is coated on the plate to be coated, the plate is transported to a dryer for drying the varnish. . In this case, a method has been adopted in which a plurality of plates to be coated are collectively conveyed by a rack, and the varnish is dried by placing the rack in a dryer. However,
In the transfer and drying method using a rack, the transfer is intermittent by taking the plate to be coated in and out of the rack. Further, the plate to be coated may be damaged when the rack is put in and out of the rack. Therefore, transport without using racks,
A drying method was desired.

On the other hand, the inventors have considered applying varnish using a vertical varnish applicator (FIG. 3) in order to improve production efficiency. The vertical varnish coating device is
It has a pair of front and rear application rolls, and supplies a plate to be applied from below to above between the application rolls to apply varnish. Further, the plate to be coated after the varnish coating is extruded upward from between the coating rolls.

[0004] Therefore, the inventors take up the plate to be coated extruded upward from the vertical varnish coating device by using a hanging transfer machine (FIGS. 1 and 2), and without removing the plate into the rack. It is considered that the varnish is dried while being conveyed one by one and using a dryer (FIG. 4) to blow air to the plate being conveyed.

[0005] In the above-mentioned coating equipment, the above-mentioned suspending and conveying machine transports the to-be-coated plate while holding both ends of the to-be-coated plate by a pair of hanging chucks fixed to both ends of the jig plate. In the meantime, the dryer dries the varnish by sending air to the plate to be applied from above the suspending and transferring machine.

[0006]

However, the following problems still remain in the coating equipment provided with the above-mentioned hanging conveyor and dryer. That is, the jig plate is formed wide in the horizontal direction to facilitate fixing of the hanging chuck. Therefore, the wind sent from the dryer is blocked, and convection occurs below the jig plate. Therefore, there is a problem in that the wind hitting the plate to be coated becomes uneven, and a half-cured portion where the varnish is not sufficiently cured remains at the end of drying.

The present invention has been made in view of such a conventional problem, and can uniformly blow air to the plate to be coated, and sufficiently cure the varnish by the end of drying. It is intended to provide a coating facility.

[0008]

According to a first aspect of the present invention, there is provided a vertical mold for supplying a plate to be coated from below to above between a pair of coating rolls and applying a varnish to the front and rear surfaces of the plate. A varnish coating device, and a suspension for holding the left and right ends of the plate to be coated extruded upward from the vertical varnish coating device where no varnish is applied, and transporting the plate in a suspended state. A transport device, and a dryer for blowing air from above the suspended transport device to the coated substrate transported by the suspended transport device. It consists of a pair of hanging chucks that hold the left end and the right end, and a jig plate having the hanging chuck fixed to both ends.
The coating equipment is characterized in that at least between the pair of hanging chucks has an intermediate portion whose plate width P is 0.5 to 7 times the thickness T of the plate to be coated.

What is most notable in the present invention is that a dryer is provided for sending air to the plate to be coated from above the hanging carrier, and the jig plate of the hanging carrier is provided in the middle. The plate width P of the portion is 0.5 to 7 times the thickness T of the plate to be coated.

Next, the operation of the present invention will be described. In the present invention, when applying varnish to the plate to be coated, the plate to be coated is supplied from below to above between the coating rolls of the vertical varnish coating device, and both sides of the plate to be coated are coated on the coating roll. Apply varnish. As a result, varnish is applied to both surfaces of the plate except for the left end and the right end. The plate to be applied immediately after the varnish application, which has been extruded upward from the vertical varnish application device, is in a state in which both sides are supported by the pair of application rolls and is upright.

Next, the hanging carrier holds the left end and the right end of the plate to which the varnish is not applied, picks up the plate immediately after the varnish application,
Convey to the dryer. The dryer dries the varnish applied to the plate to be coated by sending air from above the hanging transporter to the plate being transported by the hanging transporter.

According to the present invention, by setting the plate width P of the intermediate portion of the jig plate to be 0.5 to 7 times the thickness T of the plate to be coated as described above, The part that blocks the incoming wind is greatly reduced (Figs. 1 and 2). Therefore, the generation of convection below the jig plate is suppressed, and the plate to be coated can be uniformly blown. Therefore, the varnish can be sufficiently cured by the end of drying.

[0013] More preferably, the plate width P at the intermediate portion of the jig plate is set to 0.5 to 0.5 of the thickness T of the plate to be coated.
It is desirable to make it three times. In this case, the occurrence of the convection can be more reliably prevented.

When the plate width P at the intermediate portion of the jig plate is less than 0.5 times the thickness T of the plate to be coated, the jig plate hardly has sufficient strength. Also,
If the thickness exceeds seven times the thickness T of the plate, convection occurs below the jig plate.

Next, a printed wiring board can be used as the plate to be coated. In this case, an insulating layer made of the varnish can be formed on the printed wiring board by applying the varnish to the plate to be applied in the coating facility.

The printed wiring board is formed by forming a conductive circuit by, for example, applying metal plating to the surface of a resin board, and a varnish is applied thereon as described above. In particular, the printed wiring board is a precision component, and when the varnish-applied portion is post-processed without being dried, the post-process cannot be performed accurately, resulting in a problem of poor insulation between layers and poor conduction. appear. According to the coating equipment of the present invention, since the jig plate is provided with an intermediate portion of the plate width P, it is possible to reliably blow air to the portion where the varnish is applied, and to dry the varnish. As a result, post-processing can be performed accurately, and insulation failure and conduction failure between layers can be prevented.

The present invention can be applied not only to a printed wiring board but also to other plate-shaped coated plates. The varnish is not limited to an insulating layer, but may be another varnish such as a solder resist.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment A coating facility according to an embodiment of the present invention will be described with reference to FIGS. In this example, an example is shown in which the above-described coating equipment is applied to the manufacture of a multilayer printed wiring board 70 (FIG. 5). As shown in FIGS.
A vertical varnish coating apparatus for supplying a printed wiring board 7 as a plate to be coated from below to above between a pair of coating rolls 11 and coating a varnish 78 on a front side 71 and a back side 72 of the printed wiring board 7. 1 (FIG. 3).

The coating equipment holds the left end 73 and the right end 74 of the printed wiring board 7 extruded upward from the vertical varnish coating apparatus 1 on which the varnish 78 is not applied. 7 is provided with a hanging conveyor 3 for conveying in a suspended state (FIGS. 1 and 2). Further, the coating equipment includes dryers 64 to 67 for sending air from above the hanging carrier 3 to the printed wiring board 7 carried by the hanging carrier 3.
(FIG. 4).

As shown in FIGS. 1 and 2, the hanging carrier 3 includes a pair of hanging chucks 32 for holding the left end 73 and the right end 74 of the printed wiring board 7, and the hanging chuck 32. Jig plate 3 fixed to both ends
Consists of 1. The jig plate 31 has a plate width P at least between the pair of hanging chucks 32 of 0.5 to less than the thickness T of the printed wiring board 7.
It has a middle part 311 which is 7 times.

The above-mentioned coating equipment will be outlined. The coating equipment of the present embodiment performs varnish coating twice on a printed wiring board, and as shown in FIG. 5, a multilayer printed wiring in which insulating layers 81 and 82 formed of varnish are laminated on a printed wiring board 7. The substrate 70 is to be manufactured.

In the above-described coating equipment, as shown in FIG.
A pre-coating meter 62, a reversing machine 63, a first vertical varnish coating device 1, a post-coating meter 2, and a dryer 64 are provided. On the upper rail 34 provided above the vertical varnish coating device 1, the post-coating measuring device 2, and the dryer 64, a large number of the hanging transfer devices 3 are mounted. Note that these suspending and conveying machines 3 are arranged so as to pass through the inside of the dryer 64.

In parallel with the dryer 64, the dryer 6
5, 66, 67 are provided. Above these, upper rails 35, 36, 37 to which a plurality of hanging transporters 3 are attached are arranged similarly to the upper rail 34. The hanging carrier 3 attached to the upper rail 34 is
It is conveyed from above the first vertical varnish coating device 1 to above the post-coating meter 2. In addition, the upper rails 35, 37
The suspended carrier 3 attached to the upper rail 34 is carried in the opposite direction to the suspended carrier 3 attached to the upper rail 34, and the suspended carrier 3 attached to the upper rail 36 is carried in the same direction.

A transfer loader 68 is provided between the upper rails 34 and 35 so as to reciprocate in a direction perpendicular to these rails. The pre-coating meter 62 and the reversing machine 63 are disposed between the upper rails 35 and 36, and a second vertical varnish coating device 1 and a coating device are disposed below the upper rail 36. A rear measuring device 2 is provided. The transfer loader (not shown) is disposed between the upper rails 36 and 37 in the same manner as described above. A measuring device 69 after drying and a conveyor 61 for carrying out are disposed behind the upper rail 37.

The details will be described below. The first vertical varnish coating apparatus 1 is for applying a varnish for forming the insulating layer 81 on the substrate side to the printed wiring board 7.
The second vertical varnish coating device 1 applies a varnish for forming the insulating layer 82 to the insulating layer 81.

The above two vertical varnish coating apparatuses 1 are shown in FIG.
As shown in (1), there is a pair of front and rear coating rolls 11 whose shaft cores are arranged horizontally. In addition, the vertical varnish coating device 1
Is a coating pressure adjusting mechanism (not shown) for adjusting the coating pressure by changing the distance between the pair of coating rolls 11.
Having.

A part of the outer peripheral surface of the coating roll 11 is in contact with a varnish 78 contained in the varnish supply device 12, and the varnish 78 is applied to the outer peripheral surface by its own rotation.
Is always supplied. The varnish supplied to the first vertical varnish coating device 1 is composed of, for example, a resin material such as an epoxy resin and an auxiliary material such as a curing agent, and is supplied to the second vertical varnish coating device 1. The varnish is obtained by adding a filler to the resin raw material and the auxiliary raw material.

The vertical varnish coating device 1 is located below the end of the upper rail 34 so that the axis of the coating roll 11 is perpendicular to the upper rail 34. (FIG. 4).

Next, as shown in FIGS. 1 and 2, the hanging carrier 3 has the jig plate 31 attached to each of the upper rails in a hanging state. 32 are arranged. The distance L between the pair of hanging chucks 32 is larger than the width W of the varnish 78 applied to the printed wiring board 7. The hanging chucks 32 are separated from each other and are close to each other, and are claw portions 321 and 322 for holding the printed wiring board 7 therebetween.
Consisting of

The intermediate portion 311 of the jig plate 31 is
It is disposed between the pair of hanging chucks 32,
Further, it is disposed above the printed wiring board 7 held by the hanging chuck 32. In addition, the intermediate part 3
11 has a plate width P of 2 mm, and the printed wiring board 7 has a thickness T of 1 mm. In this example, the plate width P is twice the thickness T of the printed wiring board 7.

Next, as shown in FIG. 4, the post-coating meter 2 has a main body 21 having a display section for measurement results, and a measuring table 22 disposed horizontally above the main body. Vertical guides 23 and 24 having a U-shaped cross section are erected on the measuring table 22. Next, as the dryers 64 to 67, for example, a tunnel dryer can be used. As the conveyor 61, for example, a roller conveyor or the like can be used.

Next, as shown in FIG. 4, the transfer loader 68 is a main body 681 that reciprocates on a lower rail disposed at a right angle to the transport direction of the hanging transporter 3 on the upper rails 34 to 37. And a pair of horizontal chucks 682 that can be moved up and down on arms that are provided upright at both ends of the main body 681.

Next, the operation of this embodiment will be described. In the coating equipment of the present embodiment, as shown in FIG. 4, first, a plurality of printed wiring boards 7 placed thereon are continuously loaded by the above-mentioned loading conveyor 61, and are placed sideways before the coating. The weight of each printed wiring board 7 is measured by passing over the weighing device 62.

Next, the reversing machine 63 reverses the printed wiring boards 7 which are continuously carried in one by one by 90 degrees, and places the printed wiring boards 7 between the coating rolls 11 of the first vertical varnish coating apparatus 1 from below to above. Then, the printed wiring board 7 is supplied to the vertical varnish coating apparatus 1.

Next, as shown in FIG. 3, the vertical varnish coating device 1 is used for the front side 71 of the printed wiring board 7.
Then, the varnish 78 on the outer peripheral surface of the application roller 11 is applied to the back side surface 72. At this time, the coating pressure adjusting mechanism of the vertical varnish coating device 1 adjusts the coating pressure based on the weight data sent from the pre-coating meter 62, and adjusts the thickness of the varnish 78 to be the insulating layer 81. Adjust Thus, the vertical varnish coating device 1 applies a varnish 78 of a weight set according to each printed wiring board 7.

Thus, the varnish 78 is applied to both sides of the printed wiring board 7 except for the left end 73 and the right end 74 thereof. The printed circuit board 7
Is pushed up by the reversing machine 63 and extruded upward from the vertical varnish coating device 1. Immediately after the varnish application, the printed wiring board 7 is supported by the pair of application rolls 11 on both sides and is in an upright state.

Next, as shown in FIG. 1 and FIG. 2, the hanging carrier 3 attached to the upper rail 34 descends to bring the claw portions 321 and 322 of the hanging chuck 32 close to each other, and The upper part of the left end 73 and the right end 74 of the substrate 7 on which the varnish 78 is not applied is sandwiched.

Next, as shown in FIG. 4, the hanging and conveying machine 3 moves horizontally and conveys the printed wiring board 7 to above the post-coating meter 2, and transfers the printed wiring board 7 to the vertical type. It is placed between the guides 23 and 24. Then, the weight of the printed wiring board 7 is measured by the measuring device 2 after application. Thus, the weight of the varnish applied to the printed wiring board 7 is read from the difference between the measured values before and after the varnish application, and the quality of the applied varnish is determined.

After the weight measurement, the hanging carrier 3 picks up the printed circuit board 7 and transports it to the dryer 64 in a suspended state. And the dryer 64 is
Wind is sent from above to the plurality of printed wiring boards 7 passing through the inside, and the varnish 78 applied to each printed wiring board 7 is dried. At this time, the dryer 6
The wind sent by 4 uniformly hits the entire varnish 78 of the printed wiring board 7 without being blocked by the jig plate 31 of the hanging transfer machine 3.

Next, as shown in FIG. 4, the transfer loader 68 transfers the printed wiring board 7 transported by the suspension transporter 3 mounted on the upper rail 34 to the suspension mounted on the adjacent upper rail 35. It is transferred to the lowering conveyor 3. Specifically, the transfer loader 68 sandwiches the side portions of the left end 73 and the right end 74 of the printed wiring board 7 with the pair of horizontal chucks 682. Then, as the main body 681 moves on the lower rail, the printed wiring board 7 is transported to the hanging transporter 3 attached to the upper rail 35.

Next, similarly to the above, the upper rail 35
The printed wiring board 7 is made to pass through the inside of the dryer 65 by the hanging conveyor 3. Thereby, the insulating layer 8 is formed on the front side surface 71 and the back side surface 72 of the printed wiring board 7.
1 is formed (FIG. 5). Then, the measurement before application, reversal, application, measurement after application, and drying are repeated again as described above. Thus, the insulating layer 82 containing the filler is formed on the front side surface 811 and the back side surface 812 of the insulating layer 81, and the multilayer printed wiring board 70 is completed (FIG. 5).

Then, as shown in FIG. 4, the weight of the multilayer printed wiring board 70 is measured by the measuring device 69 after drying, and the quality of the multilayer printed wiring board 70 is determined. The multilayer printed wiring board 70 manufactured by the above-mentioned coating equipment is subjected to post-processing such as exposure and development.

According to this embodiment, by setting the plate width P of the intermediate portion 311 of the jig plate 31 to 0.5 to 7 times the thickness T of the printed wiring board 7 as described above, The portion that blocks the wind sent from the dryers 64 to 67 is greatly reduced. Therefore, the generation of convection below the jig plate 31 is suppressed, and the varnish 78 applied to the printed circuit board 7 is removed.
The wind can be evenly applied. Therefore, the varnish 78 can be sufficiently cured by the end of the drying.

Thus, the multilayer printed wiring board 7
It is possible to reliably prevent the semi-cured portion of the varnish 78 from remaining on the insulating layers 81 and 82, and to accurately perform post-processing such as exposure and development.

In this embodiment, a printed wiring board 7 is used as a plate to be coated. The printed wiring board 7
Is a conductive circuit formed by applying metal plating to the surface of a resin substrate, for example, and a varnish 78 is applied thereon as described above.

In particular, the printed wiring board 7 is a precision component, and when the portion coated with the varnish 78 is post-processed in an undried state, the post-process cannot be performed accurately, resulting in poor insulation between layers. The problem of poor conduction occurs.
According to the coating equipment of the present embodiment, as described above, the varnish 78 can be surely dried and the post-processing can be performed accurately, so that insulation failure between layers and conduction failure can be prevented.

The present invention can be applied not only to a printed wiring board but also to other plate-shaped coated plates. For example, as the varnish 78, a solder resist or the like can be used instead of the resin for forming the insulating layer.

[0048]

As described above, according to the present invention, there is provided a coating apparatus capable of uniformly blowing air to the plate to be coated and sufficiently curing the varnish by the end of drying. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view of a suspended transfer machine according to an embodiment.

FIG. 2 (a) of a hanging transfer machine according to an embodiment;
Plan view, (b) front view, (c) side view.

FIG. 3 is a perspective explanatory view of a vertical varnish coating device in the embodiment.

FIG. 4 is an explanatory perspective view of a coating facility in the embodiment.

FIG. 5 is an explanatory cross-sectional view of a printed wiring board in the embodiment.

[Explanation of symbols]

 1. . . 1. Vertical varnish coating device, . . 2. measuring device after application, . . 30. hanging conveyor, . . Jig plate, 311. . . Middle part, 32. . . Hanging chuck, 64-67. . . Dryer, 68. . . 6. transfer loader, . . Printed wiring board, 78. . . varnish,

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Makoto Kurachi 905 Kidocho, Ogaki-shi, Gifu F-term in the Ogaki Plant of IBIDEN CO., LTD. 4F042 AA06 AB00 DD09 DF02 DF07 DF16 ED01

Claims (2)

[Claims] 1. A vertical varnish coating device for supplying a plate to be coated from below to above between a pair of coating rolls to coat varnish on the front and rear surfaces of the plate, and the vertical varnish coating. A suspending transporter for holding the left end and the right end of the plate to be coated extruded upward from which no varnish is applied, and transporting the plate in a suspended state; and For the plate being transported,
A drier for sending air from above the hanging carrier, wherein the hanging carrier comprises a pair of hanging chucks for holding a left end and a right end of the plate to be coated, and both ends of the hanging chuck. Consists of a jig plate fixed to
And a jig plate having an intermediate portion having a plate width P of 0.5 to 7 times the thickness T of the plate to be applied, at least between the pair of hanging chucks. 2. The coating equipment according to claim 1, wherein the plate to be coated is a printed wiring board.