JPH0521079Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) This invention relates to an emulsion coating machine for screen printing plates, and in particular, it relates to an emulsion coating machine for screen printing plates used in screen printing. When applying the emulsion at an angle with a bucket, the bucket tilt angle can be set within a certain range in advance so that the amount of emulsion extruded can be adjusted. The present invention relates to an emulsion coating machine for screen printing plates, which has an elasticity adjustment means that automatically advances or retreats in response to the position or tension.

(Prior Art) Conventionally, in order to apply an emulsion to a flat screen printing plate for this type of screen printing, a screen material made of silk, polyester, nylon fibers, etc. woven into a mesh having a predetermined mesh was used. This is done by sliding the front edge of a bucket containing the emulsion up and down in an inclined abutment against a screen printing plate that is framed around the screen printing plate.

Such coating work is performed, for example, in JP-A-59-
This is carried out mechanically using an emulsion coating device such as those disclosed in Japanese Utility Model Publication No. 171958 and Japanese Utility Model Application Publication No. 59-144659, or manually.

At this time, the emulsion film thickness is adjusted by changing and setting the tilt angle of the bucket; increasing the tilt angle increases the amount of extrusion and thickens the film, and decreasing the tilt angle decreases the amount of extrusion. The film becomes thinner.

(Problems to be solved by the invention) However, when the tilt angle of the bucket is increased, the amount of emulsion extruded increases, resulting in uneven film thickness and also increases the occurrence of pinholes.

On the other hand, if the screen material is stainless steel mesh and the bucket is made of aluminum,
Stainless steel buckets are often used because the front edge of the bucket that comes into contact with the screen material is subject to severe wear. Unlike aluminum buckets, which have a curved bottom edge and a sloping front edge, this stainless steel bucket can't be manufactured by drawing, so the front edge has a slanted cross section that is almost square. It is formed.

However, with such a bucket shape, if the amount of emulsion is large and the angle of inclination is constant, the emulsion will overflow from the left and right edges of the bucket, and the emulsion will be applied to unnecessary areas of the screen material. However, there is a drawback that the emulsion film thickness becomes non-uniform.

In addition, if the screen material is held in a fixed position when rising, for example, if the screen material is partially deflected or the screen material surface is poorly flat due to differences in tension, uneven coating and variations in film thickness may occur. It was something that would happen. In other words, if the flatness of the screen material surface is not set constant due to twisting or distortion of the printing frame, the pressing pressure of the squeegee against the screen material surface will vary slightly, resulting in uneven coating. , variations in film thickness occurred. As a result, when a plate is manufactured using this method, the reproducibility of the circuit is poor, especially when manufacturing a complicated printed circuit board, which hinders improvement in product yield.

Therefore, this idea was devised in view of the existing circumstances as described above, and in order to make the emulsion film thickness applied to the screen material even and uniform, the amount of extrusion of the contained emulsion was This system changes the inclination angle of the bucket to make it possible to adjust the tilt angle of the bucket, and the bucket tilt adjustment mechanism that regulates the tilt angle within a certain range, and the partial deviation or tension that occurs in the screen printing plate. An object of the present invention is to provide an emulsion coating machine having an elasticity adjusting means that moves forward and backward in a corresponding manner.

[Structure of the invention] (Means for solving the problem) In order to achieve the above-mentioned purpose, in this invention, a bucket containing an emulsion is used.
The bucket is placed on both the front and back sides of a screen printing plate that is supported approximately vertically, and the bucket is tilted and raised along the screen material surface so that the emulsion can be applied to the screen material. It is equipped with a sliding mechanism that moves the bucket back and forth and brings its front edge into contact with the screen material, a tilting mechanism that tilts the bucket to the side of the screen material, and an inclination adjustment mechanism that regulates the tilt of the bucket within a certain range, The slide mechanism consists of a slide rail fixed to a carriage base that moves up and down on both the left and right sides of the screen printing plate, and a left and right slide plate that moves forward and backward guided by the slide rail, and a slide fixed to this slide plate. The cylinder rod of the cylinder is connected to the slide rail via an elastic adjustment means, and the tilting mechanism erects and fixes a bucket pipe that supports the bucket between the left and right bucket pipe arms that are pivotally supported on the slide plate. The cylinder rod of a tilted cylinder is pivotally supported via a trunnion bracket to a slide plate pipe mounted between the slide plates, and is connected to a bucket pipe, and the tilt adjustment mechanism is fixed to the bucket pipe. A shaft holder is swingably supported on a shaft bracket, and an adjustment screw, which is slidably inserted and supported by the shaft holder, is screwed so as to be able to move forward and backward into the screw shaft that is swingably supported on the trunnion bracket. The screw is formed with a stopper knob that comes into contact with and stops the upper surface of the shaft holder, which tilts with the tilting of the bucket pipe, and the elastic adjustment means is formed with an engaging protrusion at the tip of the tension plate fixed to the slide rail. The slide adjuster bolt that is engaged and inserted is connected to the cylinder rod of the slide cylinder, and a coiled spring is inserted between the cup-shaped spring guide that is fitted to the slide adjuster bolt so that it can move forward and backward, and the tension plate. The spring guide is fixed so that it can move forward and backward so that the elastic force of the spring can be adjusted using an adjustment nut.

(Function) In the emulsion coating machine for screen printing plates according to this invention, first, the screen printing plate is supported and fixed substantially vertically by appropriate means, and the emulsion is stored in the bucket.

Therefore, first, the tilt mechanism is activated to tilt the bucket, and in that state, the tilt adjustment mechanism is adjusted to preset the permissible tilt range of the bucket. The tilt angle of the bucket is adjusted according to the amount of emulsion being used, and the tilt angle is regulated within a certain range.

Next, when the operation is started, the slide door mechanism advances the bucket toward the screen material of the screen printing plate and brings its leading edge into contact with the screen material. Then, the tilting mechanism tilts the bucket toward the screen material by its operation. At this time, the angle of inclination in the bucket is
Since it is regulated within the range set by the inclination adjustment mechanism, excess emulsion does not flow out and a constant coating amount is maintained.

When the tilted bucket is raised, the emulsion flows down onto the screen material, and coating work is automatically performed on the screen material without causing uneven coating or variation in film thickness.

At this time, even if the flatness of the surface of the screen material is poor, the resiliency adjusting means automatically moves back and forth to compensate for the poor flatness of the surface of the screen material, and always supplies and coats the emulsion from the bucket with a constant pushing pressure.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

Reference numeral 1 shown in the figure represents a pair of left and right carriage bases arranged on both sides of a screen printing plate S that is supported substantially vertically in a predetermined emulsion coating machine. As shown in FIG. 5, this carriage base 1 has two carriage pipes 2 installed between the front and rear parts of the carriage base 1.
The emulsion coating machine is operated integrally with the emulsion coating machine, and is configured to move up and down via carriage means 6 disposed within the left and right walls of the emulsion coating machine.

At the front and rear of the carriage base 1, buckets 2 are provided which are disposed at the front and rear of a screen printing plate S supported substantially vertically. This Bucket 2 is
Emulsion D, which is a photosensitive liquid material, is housed inside,
The screen printing plate S is advanced against the screen material M, its front edge is brought into contact with the screen material M, and when it is tilted at a certain angle and raised, the emulsion D is applied by pushing it into the screen material M. do.

As shown in FIG. 5, the bucket 2 moves back and forth toward or away from the screen material M by the operation of the slide mechanism 10, and when in contact with the screen material M, the bucket A screen is formed so that the material M moves forward and backward elastically due to differences in deflection, tension, etc., and the emulsion D stored inside flows out from the front edge of the bucket 2 by the operation of the tilting mechanism 20. Material M is tilted to the side. These forward/backward movements and tilting movements are performed separately for the buckets 2 disposed before and after the screen printing plate S by actuating mechanisms having substantially the same structure. In other words, it is possible to appropriately control whether the process is carried out only on the front or rear side of the screen material M, or even on both sides at the same time. are shown to be different.

As shown in FIG. 4, the slide mechanism 10 includes a slide rail 11 fixed to the inner surface of the carriage base 1 in a horizontal manner along the front and back direction, and a slide plate disposed inside the carriage base 1. A slide roller 13 is pivotally mounted on the back surface of the roller 12 to sandwich the slide rail 11 from above and below and roll along the top and bottom surfaces. Slide plate 1
A cylinder rod 15 of a slide cylinder 14 fixed to a slide rail 11 is connected to a tension plate 16 fixed to a slide rail 11 with a resilient adjustment means 40 interposed therebetween.

On the other hand, as shown in FIGS. 1 and 4, the tilting mechanism 20 moves the bucket pipe 3 mounted between the left and right slide plates 12 from the pivot position of the bucket pipe arm 4 that erects and fixes the bucket pipe 3. By shaking the screen material M, the screen material M is tilted toward the screen material M. This causes the bucket belt 2 on the front side attached to the bucket pipe 3 to tilt backward, and similarly causes the bucket belt 2 on the rear side to tilt forward. That is, the cylinder rod 22 of the inclined cylinder 21 is swingably supported on the slide plate pipe 18 that connects the slide plates 12 to each other, and is connected to the bucket pipe 3. Inclined cylinder 2
1 is supported by a trunnion pin 24 supported between a pair of left and right trunnion brackets 23 which are fixed opposite to each other at both left and right ends of the slide plate pipe 18. The cylinder rod 22 is connected to the bucket pipe 3 using the uniball stay 25.
By interposing the cylinder rod 22, it is possible to adapt to the connection angle with the bucket pipe 3, which changes as the cylinder rod 22 expands and contracts. The front edge of the bucket 2 attached to the bucket pipe 3 corresponds to the pivot position of the bucket pipe arm 4, and the front edge of the bucket 2 is in contact with the screen material M of the screen printing plate S. It is assumed that the rear part of the bucket 2 is swung around the front edge so as to rise.

Therefore, when the inclined cylinder 21 is activated and its cylinder rod 22 is extended, the bucket pipe 3 mounted between the left and right slide plates 12 rises. Since it is pivotally supported by the slide plate 12 via the top pipe hinge plate 5, it swings around the pivot position, and the inclination angle of the bucket 2 changes in accordance with the extension of the cylinder rod 22. Therefore, the emulsion D contained in the bucket pipe 3 flows down from the front edge of the bucket 2 attached to the bucket pipe 3, and the emulsion D
As described above, by raising the carriage base 1 of the bucket 2 while it is flowing down, the emulsion D is forced onto the screen material M and coated.

At this time, the tilt angle of the bucket is regulated within a certain range by the tilt adjustment mechanism 30 attached to the tilt mechanism 20.

That is, as shown in FIGS. 1 to 4, this inclination adjustment mechanism 30 has an adjustment screw 32 screwed to a screw shaft 31 swingably supported on the trunnion bracket 23 so as to be able to move forward and backward, and the bucket pipe Shaft bracket 33 fixed to 3
A shaft holder 34 is supported in a swingable manner, and an adjustment screw 32 is attached to the shaft holder 34.
The adjustment screw 32 is slidably supported on the bucket pipe 3 together with the screw shaft 31 by inserting the stopper knob 35 formed on the adjustment screw 32.
The upper surface of the shaft holder 34, which tilts with the tilting of the bucket pipe 3, can come into contact with the lower surface.

The screw shaft 31 is attached to the trunnion bracket 2
It is made to be able to swing freely relative to the trunnion bracket 23 by screwing it to a support pin 36 which is supported rotatably back and forth.

The adjustment screw 32 is screwed to the screw shaft 31 by a female thread formed at the bottom thereof, and is screwed in with a sufficient length so that it can move forward and backward within a range that allows for sufficient inclination adjustment with the bucket belt 2. .

The shaft holder 34 is pivotally supported by the shaft bracket 33 by pins protruding from both the left and right sides of the shaft holder 34, and a bushing material arranged inside the shaft holder 34 allows the adjustment screw 32 to be inserted and slid smoothly. There is a plan. Further, the upper surface of the shaft holder 34 itself is formed into a flat surface so as to come into contact with the lower surface of the stopper knob 35, and the shaft holder 34 tilted as the bucket pipe 3 tilts.
When the upper surface makes contact, the tilting movement above the contact position is stopped (see FIG. 4).

The stopper knob 35 in the illustrated example is the adjustment screw 3
The stopper knob 35 is integrally formed to protrude from the upper end of the stopper knob 32, and a non-slip surface is formed around the stopper knob 35 by knurling so that the adjustment screw 32 can be easily rotated.

Further, as shown in the figure, a lock screw 37 is screwed to the screw shaft 31 below the adjustment screw 32, and by tightening the lock screw 37, the adjustment screw 32 is brought into strong contact with the lower end surface of the adjustment screw 32. 32 itself is prevented from loosening.

Further, the bucket pipe arm 4 is provided with an inclination angle display scale 38 that indicates the inclination angle.

Therefore, as shown in FIG. 3, the inclination angle is regulated by the inclination adjustment mechanism 30 by operating the inclination cylinder 21 of the inclination mechanism 20 to incline the bucket pipe 3, and adjusting it in that state. Screw in screw 32. Then, with the lower end surface of the adjustment screw 32 kept in contact with the upper surface of the shaft holder 34, the adjustment screw 32 is either screwed down further to a predetermined inclination angle via the shaft holder 34 and lowered, or loosened and raised. After setting the predetermined angle, the lock screw 37 is firmly abutted against the lower end surface of the adjustment screw 32 to prevent loosening. Next, the operation of the tilting cylinder 21 is released and the operating state is established.Then, the tilting cylinder 21 in the tilting mechanism 20 is operated to tilt the bucket 2, but the tilt is caused by the adjustment screw 32 on the upper surface of the shaft holder 34. By coming into contact with the lower end surface, its upward movement is regulated, and the bucket 2 does not incline beyond a predetermined angle.

Further, as shown in FIG. 4, the elasticity adjusting means 40 connects a slide adjust bolt 41 connected to a cylinder rod 15 of the slide cylinder 14 fixed to the slide plate 12 with a tensioner fixed to the slide rail 11. Shion plate 1
6 and engages with the tension plate 16 itself at the engagement protrusion 42. Then, a coiled spring 44 is compressed between the cup-shaped spring guide 43 fitted to the slide adjustment bolt 41 so as to be freely retractable and the tension plate 16,
A spring guide 43 is fixed so as to be movable forward and backward so that the elastic force of the spring 44 can be adjusted using an adjustment nut 45.

According to this repulsion adjusting means 40, even if the screen material M of the screen printing plate S is not set to have sufficient flatness and there is a partial deviation or difference in tension, the screen material M is in contact with the screen material M. De Baketto 2
is rising, in response to the deviation of the screen material M,
The bucket 2 automatically moves forward and backward by the action of the elasticity adjustment means 40, and the degree of contact with the screen material M is adjusted.

The present invention is constructed as described above, and next, an example of the operating state in an emulsion coating machine will be described.

First, the screen printing plate S is supported and fixed substantially vertically by appropriate means, and the emulsion D is placed in the bucket 2. On the other hand, by controlling and supporting operations in a control section (not shown), the number of applications before and after the screen material M, application on one side or both sides, bucket
The scraping of emulsion D and other operational controls are set by not tilting the emulsion.

Therefore, first, the tilt mechanism 20 is operated to tilt the bucket 2, and in this state, the adjustment screw 32 of the tilt adjustment mechanism 30 is screwed in. and,
While keeping the lower end surface of the adjustment screw 32 in contact with the upper surface of the shaft holder 34, either screw it in further and lower it, or loosen it and raise it, depending on the amount of emulsion D stored in the bucket 2. The inclination angle of the bucket 2 is adjusted and the inclination angle is regulated within a certain range.

Next, when the start switch is turned on, the slide mechanism 10 is activated, and the bucket 2 advances toward the screen material M of the screen printing plate S, and its front edge is slightly bent by the repulsive force of the repulsive adjustment means 40. It contacts the screen material M in a state where it can move forward and backward. Furthermore, the tilting mechanism 20 is operated to tilt the bucket 2 toward the screen material M, and the emulsion D is transferred to the screen material M.
flow down to. At this time, the inclination angle of the bucket 2 is regulated within the range set by the inclination adjustment mechanism 30, so that the excess emulsion D does not flow out and a constant coating amount is maintained.

Therefore, when the carriage base 1 starts to rise, the emulsion D is forced into the screen material M and applied thereto, and when it reaches a predetermined position, the rise stops. If necessary, the tilting mechanism 20 returns to operation and rises again with the bucket 2 in a horizontal state to scrape and collect the emulsion D overflowing from the bucket 2. Thereafter, when the slide mechanism 10 returns to operation and moves the bucket 2 backward, the carriage base 1 begins to descend and returns to its original position, and this coating process is performed an appropriate number of times.

[Effect of the invention] Therefore, according to this invention, by changing the inclination angle of the bucket 2 and regulating the inclination angle within a certain range, it is possible to adjust the amount of extrusion of the emulsion D contained therein. Thus, the thickness of the emulsion film coated on the screen material M can be made uniform without unevenness.

That is, this includes a sliding mechanism 10 that moves the bucket 2 containing the emulsion D therein back and forth toward the screen material S, and brings its front edge into contact with the screen material S; This is because the tilt mechanism 20 is provided with a tilt adjustment mechanism 30 that regulates the tilt of the bucket 2 within a certain range. This is because by regulating the tilt angle range of the bucket 2 in accordance with the amount of emulsion D, the amount of emulsion applied can be adjusted.

At this time, in the tilting mechanism 20, the shaft bracket 3 is moved by the operation of the tilting cylinder 21.
3 is the adjustment screw 32 via the shaft holder 34
When sliding along the screw shaft 3, the screwing operation of the adjustment screw 32 of the inclination adjustment mechanism 30
1, the shaft holder 34 slides only until it comes into contact with the stopper knob 35 at the upper end of the adjustment screw 32 and is stopped. Therefore, depending on the screwing distance of the adjustment screw 32, the bucket pipe 3, via the shaft bracket 33 by the tilting mechanism 20,
The inclination angle of the bucket 2, etc. can be regulated in advance within a certain range, and since it is done by screwing in the adjustment screw 32, minute adjustments are also possible, and the amount of emulsion D to be applied can also be precisely adjusted. enable.

In addition, the elasticity adjustment means 40 that brings the bucket 2 into contact with the surface of the screen material M by the elastic force of a spring 44 compressed in a slide adjust bolt 41 along the forward and backward direction of the bucket 2 is configured to
Even if the surface has poor flatness, twisting, distortion, etc., it automatically moves forward and backward to absorb it, and since Emulsion D is applied with a constant pressing pressure, uneven coating occurs and variations in film thickness occur. can be prevented. Moreover, since the elastic force of the spring 44 can be adjusted by advancing and retracting the adjustment nut 45 screwed into the slide adjuster bolt 41, it can be adjusted to the tension, tension, etc. of the screen material M itself. be.

As explained above, according to this invention, the inclination angle range of the bucket can be controlled by the amount of emulsion contained in the bucket, and also by the stainless steel bucket, which has a shape that makes it difficult to set the flow rate. The amount of emulsion to be spilled and coated can be adjusted within a certain range by setting it to a constant value, and there will be no uneven coating or variation in film thickness on the screen material. It has excellent effects such as a marked improvement in performance.

[Brief explanation of drawings]

The drawing shows one embodiment of this invention.
The figure is a side view of the main part, Fig. 2 is a front view of the main part, Fig. 3 is a side view of the main part when adjusting the angle, Fig. 4 is a side view of the carriage base in the emulsion coating machine, and Fig. 5 is a side view of the main part. FIG. 1 is a schematic side sectional view of the entire emulsion coating machine. S...Screen printing plate, M...Screen material,
D... Emulsion, 1... Carriage base, 2... Bucket, 3... Bucket pipe, 4... Bucket pipe arm, 5... Bucket pipe hinge plate, 6... Carriage means, 10... Slide mechanism, 11...Slide rail, 12...Slide plate, 13...Slide roller, 14...
Slide cylinder, 15... Cylinder rod, 1
6...Tension plate, 20...Tilt mechanism,
21... Inclined cylinder, 23... Trunnion bracket, 24... Trunnion pin, 25... Uniball stay, 30... Inclination adjustment mechanism, 31...
Screw shaft, 32... Adjustment screw, 33... Shaft bracket, 34... Shaft holder, 3
5...Stopper knob, 36...Support pin, 37
...Lock screw, 38...Inclination angle display scale, 4
0... Resilience adjusting means, 41... Slide adjustment bolt, 42... Engaging protrusion, 43... Spring guide, 44... Spring.

Claims (1)

[Scope of utility model registration request] Buckets containing emulsion are placed on both sides of the screen printing plate, which is supported approximately vertically, and the emulsion is applied to the screen material by raising the buckets along the surface of the screen material while tilting the buckets. A slide mechanism that moves the bucket back and forth toward the screen material and brings its front edge into contact with the screen material to apply the coating; a tilting mechanism that tilts the bucket against the screen material; and a tilting mechanism that tilts the bucket within a certain range. The slide mechanism includes a slide rail fixed to a carriage base that moves up and down on both the left and right sides of the screen printing plate, and left and right slide plates that move forward and backward guided by the slide rail. The cylinder rod of the slide cylinder fixed to the slide plate is connected to the slide rail via an elastic adjustment means, and the tilting mechanism has a bucket rod between the left and right bucket pipe arms pivotally supported on the slide plate. A bucket pipe supporting the cylinder is erected and fixed, and a cylinder rod of an inclined cylinder is pivotally supported to swing freely via a trunnion bracket to the slide plate pipe mounted between the slide plates, and the cylinder rod is connected to the bucket pipe. The inclination adjustment mechanism includes a shaft holder that is swingably supported by a shaft bracket fixed to the bucket pipe, and an adjustment screw that is slidably inserted and supported by the shaft holder and is swingably supported by the trunnion bracket. The adjustment screw is provided with a stopper knob that comes into contact with and stops the upper surface of the shaft holder, which tilts with the tilting of the bucket pipe, and the elasticity adjustment means is fixed to the slide rail. A cup-shaped spring guide is connected to the cylinder rod of the slide cylinder, and is fitted into the slide adjustment bolt so that it can move forward and backward. An emulsion coating for a screen printing plate, characterized in that a coiled spring is compressed between a tension plate and a spring guide, and a spring guide is fixed so as to be movable forward and backward so that the elastic force of the spring can be adjusted with an adjustment nut. Machine.