JPH11156271A - Slot type fluid applying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive slot type fluid applying device enabling realizing high throughput for uniformly and smoothly applying coating fluid even to a material to be coated in the shape of branches and leaves having projecting and recessing parts on the surface thereof and variations in warpage and thickness. SOLUTION: In this slot type fluid applying device 100 for applying coating fluid to a material to be coated in the shape of branches and leaves, a slot type coating head part A is provided with a head height follow-up mechanism B for following the head height according to variations in the surface height of the material to be coated 3, and the head height follow-up mechanism B is constituted of material to be coated remedy devices D and head height adjusting devices E. The devices D straddle the head A and are installed in front of and behind in the coating direction and at ends on both sides in the coating width direction. The devices E are installed in the coating width direction and on the side faces of ends on both sides for adjusting the head height according to the surface height of the slot type coating head part A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slot-type fluid coating apparatus for uniformly applying a coating fluid on a surface of a sheet-like object to be coated with a predetermined film thickness.

[0002]

2. Description of the Related Art Conventionally, a slot type fluid application device has been
The object to be coated is sucked and held on a table equipped with a vacuum suction mechanism, the table or the coating head is transported, and the coating fluid is ejected from the coating head by pressure or mechanically. It is known as a coating device.

FIG. 1 shows an application state in the conventional slot type fluid application apparatus. The application fluid (2) discharged from the slot flow path (1) of the application head (A) forms a liquid pool (4) of the application fluid (2) on the upstream side in the traveling direction of the object (3). While forming, a coating film is formed on the surface of the object to be coated (3).

However, from the principle of application, the uniform application is performed by maintaining a constant gap between the object (3) and the slot (As) of the application head (A). If 3) is not flat, for example, if there is warpage or thickness variation, it is not possible to maintain a constant gap between the object to be coated (3) and the slot (As) of the coating head (A), As a result, uniform and smooth coating cannot be performed.

In fact, the object to be coated (3) having irregularities on the surface
For example, a conductor layer is formed on both sides or one side of an insulation layer, an insulation resin liquid is applied on the upper surface, and the insulation layer provided by drying is formed by alternately laminating a conductor circuit layer made of plating. When the insulating resin liquid is applied to the multilayer printed wiring board, the multilayer printed wiring board or the like is subjected to a high temperature treatment in each step of its manufacture, so that there are warpages caused by thermal deformation and stress of the laminated film. When the warp is large, the surface of the object (3) cannot be held flat by only holding by vacuum suction, and the object (3) and the slot (As) of the application head (A) cannot be held. And the formation of the liquid pool (4) of the coating fluid (2) described above becomes unstable, and as a result, the slot (As) of the coating head (A) scrapes the coating film. Therefore, there is a problem that the film thickness becomes uneven.

In the case of the printed wiring board, etc., the thickness of the substrate itself varies, and when the thickness varies greatly,
The coating object (3) and the slot portion (A) of the coating head portion (A)
s) changes, and the formation of the liquid pool (4) of the application fluid (2) described above becomes unstable, and as a result, the slot (As) of the application head (A) coats the coating film. There is a problem that the film thickness becomes uneven due to scraping.

In order to solve this problem, a change in the surface height of the object to be coated (3) is detected in advance by using a contact type or non-contact type displacement meter, and the head is moved based on the detected data. The gap between the coating object (3) and the slot portion (As) of the coating head portion (A) is maintained by moving up and down.

However, in the method of detecting using the above-mentioned displacement meter or the like, even if a non-contact type displacement meter is used, even if the displacement of the surface of the object (3) can be measured continuously, Due to the ability of the head portion (A) to move up and down, only the up-and-down operation by linear interpolation between the points can be performed, and it is not possible to follow the head completely continuously.

In addition, the above-mentioned method has a problem that the time required for detection is extra time separately from the time of the coating process, and the throughput cannot be increased. Further, a detection mechanism is provided for high-precision detection. There is a problem that the device becomes expensive and as a result, the device becomes considerably expensive.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a sheet-like shape having a warp or a thickness variation on its surface. An object of the present invention is to provide an inexpensive and high-throughput slot-type fluid application device for applying an application fluid evenly and smoothly to an object to be applied.

[0011]

In order to achieve the above object, according to the present invention, a slot type for applying an application fluid to a sheet-shaped object having irregularities on its surface is provided. In the fluid coating apparatus, a slot-type coating head portion is provided with a head height follow-up mechanism for causing the head height to follow a variation in the surface height of the object to be coated. This is a mold fluid application device.

Further, in the invention according to claim 2, the head height follow-up mechanism is provided at a non-coating portion at the front and rear sides in the coating direction and at both right and left ends in the coating width direction across the slot-type coating head portion. And a head height adjustment device that adjusts the height of the head in accordance with the height of the surface of the object to be coated, provided on both left and right side surfaces in the coating width direction of the slot-type coating head. A slot type fluid application device according to claim 1 is provided.

In the invention according to claim 3, the apparatus for correcting an object to be coated corrects a warp of an end of the object to be coated and performs non-coating of the object to be coated while following a surface height displacement of the object to be coated. 3. The slot type fluid coating apparatus according to claim 1, wherein the height of the slot type coating head is made to follow the surface height variation of the object to be coated by being conveyed on the surface of the part. .

[0014]

According to the present invention, as shown in FIG. 2, the height of the coating head portion follows the slot-type coating head portion (A) in accordance with the variation in the height of the surface of the workpiece (3). The head height following mechanism (B) for causing the object (3) to be coated and the coating head unit even when the surface of the object (3) fluctuates due to warpage or thickness fluctuation. The gap between the slot (A) and the slot (As) in (A) can be always kept constant, and as a result, a uniform and smooth coating film can be formed on the object (3).

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 3, an extruding part (C) constituting the slot type fluid coating apparatus according to the present invention comprises a storage tank (5) for storing the coating fluid (2) and the storage tank (5). ) And a pump (7) for pumping the coating fluid (2) discharged from the discharge pipe (6) to the slot type coating head (A) side. ) And a pressure feed pipe (8) for feeding the coating fluid (2) pumped by the pump (7) to the coating head (A).

As shown in FIG. 4, the slot-type coating head (A) is fixed at a fixed position, and a coating fluid (2) is applied to the lower end of the coating head (A) at the surface of the object (3). Slot (As) (T-die slit section for applying the application fluid (2) to be applied linearly in the width direction of the object (3)).

The slot type coating head (A)
As shown in FIG. 4, the head body block (9) made of metal and the head body block (9) for introducing the application fluid (2) fed from the feed pipe (8) shown in FIG. ), And an introduction channel (10) provided in the hole.

In the slot type coating head (A),
As shown in FIG. 4, a metal object correction device mounting part (12), a main body support part (13), and a part of the present invention,
An object-to-be-corrected device (D) composed of a spring (14) and a metal (for example, stainless steel) wheel (15) is provided on the upstream side of the slot type coating head portion (A) with respect to the coating direction (FIG. 4 left), downstream (right in FIG. 4)
Is provided at each of the left and right non-application positions.

As shown in FIG. 5, a linear actuator (AC) is provided on the slot type coating head (A).
A head height adjusting device (E) driven up and down by a DC servo motor or a pulse motor is provided on each of the left and right sides of the coating width direction.

As shown in FIG. 4, in the apparatus for correcting an object to be coated (D), an object mounting table (16) is provided.
The height (H) of the lowermost end of the wheel (15) from the surface is equal to or less than the height (Ha) of the lowermost end of the slot (As) of the slot type coating head (A) and the surface height of the object to be coated. (Hb) The height is adjusted by the head height adjusting device (E) shown in FIG. 5 as described above. The wheel (15) is smoothly and rotatably held by a Delrin bearing (or an air bearing). When the wheel (15) is applied, the wheel (15) comes into contact with the surface of the non-applied portion of the object (3) to move the object. And go around at the same speed.

As shown in FIG. 3, the coating fluid (2) is supplied to the slot-type coating head (A) by a pump (7) at a predetermined pressure through a pressure feed pipe (8). It is pressure-fed and discharged from the introduction flow path (10) through the slot flow path (shown in FIG. 1) at a constant flow rate per unit time from the slot section (As) in the width direction of the object (3).

As shown in FIG. 3, one to two or more pieces of the object placing table (16) are installed so as to be movable in the horizontal direction, and are placed on the table (16). The object to be coated (3) is placed and fixed. Further, in FIG. 3, an unapplied object (3) is placed on the object-loading table (16) at the right end, and an unapplied object is placed on the intermediate object-loading table (16). The coated object (3) is placed and fixed on the coated object mounting table (16) at the left end, respectively.

Also, the object-to-be-coated table (16)
Comprises a horizontal table main body movable in a horizontal direction, and a movement driving means for moving the table main body.

The moving driving means includes a driving source (servo motor, pulse motor, or air cylinder), a linear guide for guiding in the moving direction, and a drive transmitting unit (gear, sprocket, chain, spiral shaft, rack gear & Pinion gear).

Further, the object to be coated table (1)
6), as shown in FIG. 3, a horizontal table body, a bracket (17) integrally provided at a lower portion (or a side portion) of the table body, and a linear guide ( 18).

The linear guide (18) is fitted on a linear guide stay that slides and guides on the side surface of the table body or the bracket (17) or a penetrating portion penetrated through the table body or the bracket (17). Consists of a linear guide shaft.

The lower and upper surfaces of one or more tables are supported by bearing supporting portions (19) (also serving as frames of the apparatus main body) installed at both ends (left and right ends of FIG. 3) of the apparatus main body. A spiral shaft (20) screwed to the bracket (17) in the horizontal movement direction, a servomotor (21) for driving and rotating the spiral shaft (20), and a rotation operation system of the servomotor (21). Rotary encoder (2
2) It is configured by a moving position and moving amount detecting unit by (or a linear encoder installed in parallel with the linear guide).

As shown in FIG. 3, the spiral shaft (2) is rotated at a predetermined rotational speed by a servomotor (21).
By rotating (0) in the forward (or reverse) direction, the bracket (17) to which the shaft (20) is screwed is attached.
Moves forward (or backward) and moves the bracket (1
7) The object mounting table (16) mounted on the
It moves forward (or retreats) in the horizontal direction along the linear guide (18), and horizontally moves at a predetermined speed (separation distance) below a slot-type coating head (A) at a predetermined height (separation distance).

The horizontal movement speed of the object-loading table 16 is controlled by a control unit F. The control unit F includes an input unit and a central processing control unit (CPU circuit; microprocessor, programmable). Controller, sequencer, etc.), arithmetic unit, storage unit such as program memory, control memory, setup memory, output unit for outputting input data, control data, control processing data, etc., and display unit for visually displaying output data (CR
T, LCD display, printer, etc.) and an external storage unit (recorder).

This input is given as a known application condition in advance.
From the input unit such as a keyboard or mouse, or a disk drive for downloading input data from a recording medium such as a floppy disk,
The thickness, coating film thickness, etc. are set and input to the central processing control unit.

The control unit (F) calculates and outputs operation control data such as the optimum application moving speed of the object-loading table 16 based on the application conditions, and based on the operation control data. , The rotation speed and the rotation direction of the servomotor (21) are controlled, and
The horizontal movement speed of 6) is maintained at a predetermined speed, or the speed is changed, or a forward (leftward in FIG. 3) and backward (rightward in FIG. 3) operation is performed.

Alternatively, the size, thickness, and thickness of the object to be coated (3) may be determined as input conditions such as a keyboard, a mouse, or a disk drive for downloading input data from a storage medium such as a floppy disk. After setting and inputting the coating film thickness etc. to the central processing control unit, the real-time coating conditions output during the operation of the device main body are detected by each element moving device of the device main body and the detection encoder that detects the moving amount The input data is input from the input unit to the central processing control unit in real time as a control processing data signal.

The control unit (F) calculates and outputs operation control data such as an optimum application moving speed of the object mounting table (16) based on the application conditions, and based on the operation control data. , The rotation speed and the rotation direction of the servomotor 21 are controlled, and
The horizontal movement speed of 6) is maintained at a predetermined speed, or the speed is changed, or a forward (leftward in FIG. 3) and backward (rightward in FIG. 3) operation is performed.

Further, as shown in FIG. 2, the slot type coating head (A) is positioned with respect to the coating object mounting table (16).
An elevating mechanism (G) for raising and lowering the table is provided with a column (23) which stands vertically on both sides in the width direction of the object-loading table (16), and is supported by the column (23). A support frame (24) provided above the application object mounting table (16).

The elevating mechanism (G) is used for a large range elevating operation, and the head height adjusting device (E) is used for a small range (fine adjustment) operation.

By operating the elevating mechanism (G) or the head height adjusting device (E), the slot (As) attached to and supported by the support frame (24) is moved to the work table (16). ), The height (separation distance) can be appropriately set apart or approaching while maintaining a parallel relationship with respect to (1).

In the present invention, first, an object to be coated (3), for example, a substrate for a multilayer printed wiring board, is placed on an object to be coated table (16). (16) Suction and holding by suction holes provided on the surface. Next, the application object mounting table (16) is horizontally moved (advanced) to a predetermined position, and at the same time, the application object (3) is held while the slot-type application head portion (A) is kept at a constant gap.
Lower it up.

Next, the object mounting table (16)
While horizontally moving (advancing) at a predetermined speed, the coating object correcting device (D) provided in the coating head portion (A)
The warp of the object (3) is corrected, and the slot (A) of the slot type coating head is adjusted by the head height adjusting device (E).
s) and the object to be coated (3) are moved up and down so as to have a predetermined separation distance.

Next, the coating fluid (2) is pumped into the coating head section (A) by a pump (7) at a predetermined pressure through a pressure feed pipe (8), and is introduced into an introduction flow path (10). Through the slot flow path (1) and from the slot (As) at a constant flow rate per unit time onto the surface of the object (3) in the width direction.

During the coating, the metal (for example, stainless steel) wheels (15) provided in the coating object correcting device (D) are moved at the same speed as the moving speed of the coating object mounting table (16). When the surface height of the object (3) fluctuates, the non-application portion of the object (3) is conveyed following the height fluctuation.

After the coating is completed, the slot type coating head (A) is raised by the elevating mechanism (G), and the coating object mounting table (16) is moved horizontally to a predetermined position, and the suction is released and the coating is performed. The applied material (3) is discharged.

[0043]

EXAMPLES Next, the present invention will be described more specifically with reference to examples. <Embodiment 1> A slot type fluid coating apparatus (10) having a head height follower (B) according to the present invention as shown in FIG.
0), the object to be coated has a height of 15 μm and a width of 10 μm.
Concave concave warpage rate (percentage of maximum warp per 1000 mm length by deforming concavely in the direction parallel to the side) with unevenness formed by a conductor circuit layer of 0 μm or less
5%, copper foil laminated printed wiring board (size 340 × 340mm, thickness 0.4mm) with in-plane thickness variation of 50μm
And as a coating fluid, 40 parts by weight of an ultraviolet curable resin obtained by reacting bisphenol A type epoxy acrylate with phthalic anhydride, alicyclic epoxy resin 2
A mixture obtained by adding 20 parts by weight of ethyl cellosolve acetate as a solvent to a mixture of 0 parts by weight, 5 parts by weight of an epoxy resin containing an aromatic compound, 10 parts by weight of silica gel fine powder, and 5 parts by weight of an additive such as a photopolymerization initiator is used. And thickness 40μm ±
A 1.5 μm uniform and smooth insulating layer could be formed on the copper foil laminated printed wiring board.

<Embodiment 2> A slot type fluid coating apparatus (100) having a head height follower (B) according to the present invention as shown in FIG.
m, concave and convex warpage rate (percentage of maximum warp per 1000 mm length by deforming concavely in a direction parallel to the side) with unevenness formed by a conductor circuit layer having a width of 100 μm or less 0.3% A copper foil laminated printed wiring board (size 340 × 340 mm, thickness 0.8 mm) having a thickness variation of 80 μm in the inside is obtained by reacting bisphenol A type epoxy acrylate with phthalic anhydride as a coating fluid. Ethyl cellosolve was added to a mixture of 40 parts by weight of an ultraviolet curable resin, 20 parts by weight of an alicyclic epoxy resin, 5 parts by weight of an aromatic epoxy resin, 10 parts by weight of silica gel fine powder, and 5 parts by weight of additives such as a photopolymerization initiator. Using 20 parts by weight of acetate as a solvent, a uniform and smooth insulating layer having a thickness of 35 μm ± 1.2 μm is formed on a copper foil laminated printed wiring board. I was able to.

[0045]

As described above, the present invention has the following effects. That is, in a slot-type fluid coating apparatus for applying a coating fluid to a sheet-shaped object to be coated having irregularities on its surface, a slot-type coating head is provided with a head height corresponding to a change in the surface height of the object to be coated. A head height follow-up mechanism for following the head is provided, and the head height follow-up mechanism is provided on the non-coating portions at the left and right ends on the left and right sides in the coating width direction in the coating direction across the slot-type coating head portion. It is composed of an object straightening device and a head height adjusting device that adjusts the height of the head according to the height of the surface of the object to be coated provided on both left and right side surfaces in the coating width direction of the slot type coating head portion,
In addition, the apparatus for correcting an object to be coated corrects a warp of an edge of the object to be coated, and conveys the surface of the object to be coated on a non-coated part surface while following a surface height displacement of the object to be coated. Since the slot type fluid coating device is designed so that the height of the slot type coating head follows the fluctuation of the surface height of the object, the gap distance between the slot type coating head and the object can be kept constant. The liquid pool is stabilized, and as a result, a uniform and smooth coating film can be obtained on the object to be coated.

Further, as compared with the conventional method of elevating and lowering the coating head using a contact or non-contact electrometer, there is no problem in that the time for detection is extra than the time of the coating process. Therefore, the throughput can be increased and an expensive detection mechanism is not required, so that a simple and inexpensive slot type fluid application device can be provided.

[Brief description of the drawings]

FIG. 1 is a side view for explaining an application state in a conventional slot type fluid application apparatus according to the present invention.

FIG. 2 is an overall side view of the slot type fluid application device of the present invention.

FIG. 3 is an overall front view of the slot type fluid application device of the present invention.

FIG. 4 is a front view for explaining a head height following mechanism and a head height (separation distance) of the slot type fluid application device of the present invention.

FIG. 5 is a side view for explaining a head height following mechanism of the slot type fluid application device of the present invention.

[Explanation of symbols]

 1 slot flow path, 2 coating fluid 3 coating object 4 liquid pool 5 storage tank 6 discharge pipe 7 pump 8 pressure supply pipe 9 head body block 10 Introductory flow passage 12 Mounting part straightening device mounting part 13 Body support part 14 Spring 15 Wheel 16 Table Work table 17 Bracket 18 Linear guide 19 ‥ Bearing support part 20 ‥‥ Spiral shaft 21 ‥‥ Servo motor 22 ‥‥ Rotary encoder 23 ‥‥ Post 24 ‥‥ Support frame 100 ‥‥ Slot type fluid coating device A ‥‥ Slot type coating head As ‥‥ Slot B ‥‥ Head height follow-up mechanism C ‥‥ Extrusion D Is Ha ‥‥ slot lowest point height Hb ‥‥ the coating object surface height

Claims (3)

[Claims] 1. A slot type fluid application device for applying an application fluid to a sheet-shaped object having irregularities on a surface thereof.
A slot-type fluid coating device, comprising: a slot-type coating head unit; and a head-height follow-up mechanism for following the head height according to a change in the surface height of the object to be coated. 2. A device for correcting an object to be coated, wherein said head height follow-up mechanism is provided at a non-coating portion across the slot-type coating head portion in front and rear directions in the coating direction and at both left and right ends in a coating width direction, and a slot-type coating head portion. 2. The apparatus according to claim 1, further comprising: a head height adjusting device that adjusts the height of the head according to the height of the surface of the object to be coated provided on both left and right side surfaces in the application width direction. Slot type fluid coating device. 3. The apparatus for correcting an object to be coated corrects a warp of an end of the object to be coated, and conveys the object to be coated on a surface of a non-coated part while following a surface height displacement of the object. 3. The slot type fluid coating apparatus according to claim 1, wherein the height of the slot type coating head is made to follow the surface height variation of the object to be coated.