JPH036916Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to a bucket actuating device for an emulsion coating machine, and when applying emulsion, which becomes a light-sensitive material, to a screen printing plate used in screen printing, the unevenness of the applied surface is The present invention relates to a bucket actuator for an emulsion coating machine that automatically adjusts the thickness of the coating to be uniform over the entire coated surface even when there are differences in tension, etc.

[Technical background of the invention and its problems] Conventionally, when applying an emulsion that becomes a photosensitive material to a screen printing plate used for this type of screen printing, there are problems due to differences in the unevenness of the applied surface, tension, etc. This invention relates to a bucket actuation device for an emulsion coating machine that automatically adjusts the thickness of the coating to be uniform over the entire coating surface.

[Technical background of the invention and its problems] Conventionally, in order to apply an emulsion to a flat screen printing plate for this type of screen printing, silk, polyester, nylon fibers, etc. having a predetermined mesh were used to make a mesh. This is done by sliding the emulsion up and down with the front edge of a bucket containing the emulsion in contact with a screen printing plate that is framed around a screen material woven into a pattern. At that time, if the bucket was moved manually, it required skill and it was extremely difficult to achieve a uniform coating thickness.

Japanese Patent Application Laid-Open No. 59-171958 was proposed to solve this problem.
There is an emulsion coating device disclosed in Japanese Utility Model Application Publication No. 59-144659. As shown in FIG. 6, front and rear tilting arms 102 are swingably supported on left and right units 101 that move up and down along both left and right sides of a screen printing plate S supported substantially vertically. A support bar 104 to which a squeegee (bucket) 103 is removably attached is placed between the inclined arms 102 facing each other on the left and right sides so as to be slidingly guided back and forth by a slide shaft 105 attached to the inclined arms 102. In addition, a cylinder rod of a reciprocating cylinder 106 fixed to a tilting arm 102 is connected to the support bar 104, and a cylinder rod of a tilting cylinder 107 pivotally supported on the unit 101 is connected to the tilting arm 102. According to this, since the screen printing plate S operates separately before and after the screen printing plate S, the emulsion D can be coated on both sides simultaneously or only on one side, making it possible to realize a variety of coating forms. Also, the coating thickness for the screen material M surface is as follows:
It is determined by the advancing distance of 6, and if this is set before application, it will rise at a certain position,
The flow rate and pressure of the screen material M are kept constant.

However, maintaining a constant position during the ascent may result in partial deviation of the screen material M or difference in tension, as shown in Fig. 7, which may cause the flatness of the surface of the screen material M to become In bad cases, uneven coating and variations in film thickness may occur. In other words, if the flatness of the screen material M surface is not set constant due to twisting or distortion of the printing frame, the pressing pressure of the squeegee 103 against the screen material M surface will vary slightly. , uneven coating, and 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.

[Purpose of the invention] This invention was devised to eliminate the above-mentioned drawbacks of the conventional technology, and even if the flatness of the screen material surface is poor, it automatically absorbs the movement of the screen material and makes it possible to maintain a constant level at all times. The purpose is to prevent the occurrence of uneven coating and variations in film thickness by applying the coating using indentation pressure.

[Summary of the invention] In order to achieve the above-mentioned purpose, this invention applies a bucket containing the emulsion to the surface of the screen material by adjusting its deflection and tension difference in order to coat the emulsion with a constant pressing pressure. It is designed to automatically move forward or backward in response to the situation.

Specifically, buckets containing emulsion are placed on both sides of a screen printing plate that is supported approximately vertically, and the buckets are tilted and raised along the surface of the screen material. In order to apply the emulsion to the screen material, the bucket is moved back and forth toward the screen material, and includes a sliding mechanism that brings the leading edge of the bucket into contact with the screen material, and a tilting mechanism that tilts the bucket toward the screen material. This consists in that the slide mechanism is provided with a resiliency adjustment means for bringing the bucket into contact with the screen material so that it can move forward and backward in an elastic manner.

[Embodiment of the invention] An embodiment of the invention will be described below with reference to FIGS. 1 to 5.

Reference numeral 1 shown in the figure represents a pair of left and right carriage bases 1 disposed on both sides of a screen printing plate S that is supported substantially vertically in a predetermined emulsion coating machine. This carriage base 1 is
They are operated integrally by a carriage pipe 2 installed between the front and rear parts. That is, as shown in FIG. 4, a carriage roller 4, which is pivotally supported by a roller base 3 fixed to the back surface of the carriage base 1, is sandwiched between the front and rear edges of a guide 5, which is vertically disposed within the left and right walls of the emulsion coating machine, and is rolled. The chain 5A is rotated as appropriate in the left and right walls.
A roller base 3 is connected to the roller base 3, and the carriage base 1 is configured to move up and down by the looping drive of a chain 5A.

At the front and rear of the carriage base 1, there are provided buckets 6 having a substantially arcuate cross-section and arranged in front and behind a screen printing plate S supported substantially vertically. This bucket 6 contains emulsion D, which is a photosensitive liquid material, and moves forward against the screen material M of the screen printing plate S, brings its front edge into contact with the screen material M, and tilts at a certain angle. When the screen material M is lifted up, the emulsion D is applied to the screen material M by forcing it.

As shown in FIG. 1, the bucket 6 moves back and forth toward or away from the screen material M by the operation of the bucket mechanism 10, and when in contact with the screen material M, the bucket 6 moves back and forth toward or away from the screen material M. The screen material moves forward and backward elastically depending on the deviation, tension, etc. of M, and also allows the emulsion D housed inside to flow out from the front edge of the bucket 6 by the operation of the tilting mechanism 30. M tilts to the side. These forward/backward movements and tilting movements are performed separately for the bucket carts 6 disposed before and after the screen printing plate S by actuating mechanisms having exactly the same structure. In other words, it is controlled as appropriate 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.

The slide mechanism 10 includes a carriage base 1
A horizontal slide rail 11 is fixed to the inside surface of the carriage base 1 in a horizontal direction along the front and back direction, and the slide rail 11 is held between the top and bottom of the back surface of the slide plate 12 arranged inside the carriage base 1. A slide roller 13 that rotates is mounted on a shaft. A cylinder rod 15 of a slide cylinder 14 fixed to a slide plate 12 is connected to a tension plate 16 fixed to a slide rail 11 with an elasticity adjusting means 17 interposed therebetween.

As shown in FIGS. 2 and 4, the elastic adjustment means 17 is configured to insert a slide adjust bolt 18 connected to the tip of the tension plate 16 into the tension plate 16, and adjust the tension at the engagement protrusion 18A. engages plate 16; A cup-shaped spring guide 19 and a tension plate 1 are fitted into the slide adjustment bolt 18 so as to be able to move forward and backward.
A coiled spring 21 is compressed between the spring guide 19 and the spring guide 19, and the spring guide 19 can be fixed in a movable manner so that the elastic force of the spring 21 can be adjusted with an adjustment nut 22.

Further, slide plates 12 are arranged on the left and right sides of the emulsion coating machine. The left and right slide plates 12 on the front side move forward and backward integrally through a slide plate pipe 23 installed between the front parts, and when the slide cylinder 14 is operated and its cylinder rod 15 is extended, the emulsion The screen printing plate S on the rear side of the coating machine moves forward toward the screen material M. Similarly, the left and right slide plates 12 on the rear sides move forward and backward as a unit by a slide plate pipe 23 installed between the rear sides, and when the slide cylinder 14 is operated and its cylinder rod 15 is extended, The screen printing plate S on the front side of the emulsion coater advances toward the screen material M.

Furthermore, the bucket 6 is detachably attached to a substantially rectangular bucket pipe 7 mounted between the left and right slide plates 12. The bucket pipe 7 is fixed to the rear upper ends of the left and right slide plates 12 on the front side, and on the bucket pipe hinge plates 8 fixed in a protruding manner to the front upper ends of the left and right slide plates 12 on the rear side, respectively. The left and right bucket pipe arms 9 are pivotally supported, and are installed and fixed between the left and right bucket pipe arms 9.

Therefore, when the slide cylinder 14 is activated and its cylinder rod 15 is extended, the slide plate 1 to which the slide cylinder 14 is fixed
2, as the slide roller 13 rolls along the slide rail 11, the screen printing plate S advances toward the screen material M, and the front of the bucket 6 mounted between the left and right slide plates 12 is moved forward. The edge is brought into contact with the screen material M. At this time, even though the spring 21 in the elasticity adjusting means 17 is compressed, the reaction force sufficiently moves the slide plate 12 forward.
After the forward movement is completed, the spring 2 of the elasticity adjusting means 17
1 is able to expand and contract elastically. Moreover, the expansion and contraction is done by the left and right slide plates 12.
As shown in FIG. 5, by setting a clearance at a predetermined interval between the slide rail 11 and the slide plate 12 arranged inside it, the bucket 6 teeth,
A degree of freedom can be obtained on the left and right sides, for example, screen material M
It is possible to automatically advance and retreat independently when the tension etc. on the left and right sides are different.

On the other hand, as shown in FIGS. 2 and 3, the tilting mechanism 30 moves the bucket pipe 7 installed between the left and right slide plates 12 to the pivot position of the bucket pipe arm 9 that erects and fixes the bucket pipe 7. By shaking the screen material M, the screen material M is tilted toward the screen material M. This causes the bucket belt 6 on the front side attached to the bucket pipe 7 to tilt backward, and similarly causes the bucket belt 6 on the rear side to tilt forward. That is, the cylinder rod 32 of the inclined cylinder 31, which is swingably supported on the slide plate pipe 23, is connected to the bucket pipe 7. The inclined cylinder 31 is supported by a trunnion pin 34 supported between a pair of left and right trunnion brackets 33 which are fixed to face each other at both left and right ends of the slide plate pipe 23. The cylinder rod 32 is connected to the bucket pipe 7 by interposing the uniball stay 35.
It is possible to adapt to the connection angle with the bucket pipe 7 which changes depending on the expansion and contraction of the pipe 2. The front edge of the bucket 6 attached to the bucket pipe 7 corresponds to the pivot position of the bucket pipe arm 9, and the front edge of the bucket 6 is in contact with the screen material M of the screen printing plate S. It is assumed that the rear part of the bucket 6 is swung upwardly around the front edge.

Therefore, when the inclined cylinder 31 is activated and its cylinder rod 32 is extended, the bucket pipe 7 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 8, it swings around the pivot position, and the inclination angle of the bucket 6 changes in accordance with the extension of the cylinder rod 32. Therefore, the emulsion D contained inside flows down from the front edge of the bucket 6 attached to the bucket pipe 7, and the emulsion D
As described above, by raising the carriage base 1 of the bucket 6 while it is flowing down, the emulsion D is forced onto the screen material M and coated.

This invention is constructed as described above, and next, an example of its use in an emulsion coating machine incorporating this invention will be explained.

First, the screen printing plate S is supported and fixed substantially vertically by appropriate means, and the emulsion D is placed in the bucket 6. On the other hand, by controlling and supporting operations in a control section (not shown), the number of coatings before and after the screen material M, coating on one side or both sides, bucket 6
The scraping of emulsion D and other operational controls are set by not tilting the emulsion. Next, when the start switch is turned on, the slide mechanism 10 is activated, and the bucket 6 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 17. It contacts the screen material M in a state where it can move forward and backward. Further, the tilting mechanism 30 is operated to tilt the bucket 6 toward the screen material M, causing the emulsion D to flow down onto the screen material M. 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 30 returns to operation and raises the bucket 6 again with the bucket 6 in the horizontal state.
The emulsion D overflowing from the container is scraped off and collected.
Thereafter, when the slide mechanism 10 returns to operation and moves the bucket 6 backward, the carriage base 1 starts to descend and returns to its original position, and this coating process is performed an appropriate number of times.

At this time, the screen material M of the screen printing plate S
If sufficient flatness is not set for the screen material and there is a difference in partial deviation or tension, the screen material M
When the bucket 6 is rising while in contact with the screen material M, the bucket 6 automatically advances or retreats by the action of the elasticity adjustment means 17 in response to the deviation of the screen material M, and the bucket 6 is brought into contact with the screen material M. The degree of
(see figure).

[Effect of the invention] Since this invention is structured as described above,
Even if the flatness of the surface of the screen material M is not set constant due to twisting or distortion of the plate frame in the screen printing plate S, and even if there is partial deviation or tension, the bucket 6 may When the emulsion D is forced into the coating by being brought into contact with and being lifted up, the bucket 6 elastically moves back and forth in response to the irregularities of the screen material M, making it possible to form a uniform film thickness over the entire coating surface. .

That is, the bucket 6 is attached to a slide mechanism 10 that moves the bucket 6 containing the emulsion D therein back and forth toward the screen material M of the screen printing plate S, and brings the leading edge of the bucket 6 into contact with the screen material M. This is because the resiliency adjusting means 17 is attached to the screen material M to make it come into contact with the screen material M so as to be able to move forward and backward in an elastic manner. As a result, even if the flatness of the screen material M of the screen printing plate S is poor, the pressing pressure changes slightly due to the elastic force, and uneven coating and film thickness variations do not occur. This method has excellent effects such as being able to produce good plates and significantly improving product yield.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of this invention, with Figure 1 being a schematic side view, Figure 2 being a side view,
Fig. 3 is a front view, Fig. 4 is a plan view, Fig. 5 is a plan view showing the degree of freedom of movement in left and right directions, Fig. 6 and Fig. 7 show a conventional example, and Fig. 6 is a side view. , 7th
The figure is a schematic side view of the device in its operating state. S...Screen printing plate, M...Screen material,
D... Emulsion, 1... Carriage base, 2... Carriage pipe, 3... Roller base, 4...
Carriage roller, 5...Guide, 5A...Chain, 6...Bucket, 7...Bucket pipe,
8...Bucket pipe hinge plate, 9...Bucket pipe arm, 10...Slide mechanism, 1
DESCRIPTION OF SYMBOLS 1...Slide rail, 12...Slide plate, 13...Slide roller, 14...Slide cylinder, 15...Cylinder rod, 16...Tension plate, 17...Resilience adjustment means, 18
...Slide adjustment bolt, 18A...Engaging protrusion, 19...Spring guide, 21...Spring, 22...Adjusting nut, 23...Slide plate pipe, 30...Tilt mechanism, 31...Tilt cylinder , 32... cylinder rod, 33...
Trunnion bracket, 34...Trunion pin, 35...Uniball stay, 101...Unit, 102...Inclination arm, 103...Squeegee, 104...Support bar, 105...Slide shaft, 106...Movement cylinder , 107...
Tilt motion cylinder.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A bucket containing an emulsion inside is placed on both sides of the front and back of a screen printing plate supported substantially vertically, and the bucket is tilted along the surface of the screen material. A sliding mechanism that moves the bucket back and forth toward the screen material and brings its front edge into contact with the screen material so that the emulsion is applied to the screen material by raising it; and a tilting mechanism that tilts the bucket toward the screen material. 1. A bucket actuating device for an emulsion coating machine, characterized in that the slide mechanism is provided with elastic adjustment means for bringing the bucket into contact with a screen material so that it can move forward and backward in a resilient manner. 2. The slide mechanism has a horizontal slide rail fixed to the inside surface of the carriage base that moves up and down on both the left and right sides of the screen printing plate, and a horizontal slide rail that runs along the front and back direction. , the slide rail is held between the top and bottom, and a slide roller that rolls along the top and bottom surfaces is pivotably mounted, and the cylinder rod of the slide cylinder fixed to the slide plate is attached to a tension plate fixed to the slide rail with elastic adjustment means. A bucket actuating device for an emulsion coating machine according to claim 1, which is interposed and connected. 3. The elasticity adjusting means is configured such that the slide adjustment bolt connected to the tip of the tension plate is inserted through the tension plate and engaged with the tension plate at the engagement protrusion, and is also fitted into the slide adjustment bolt so as to be freely retractable. A utility model in which a coiled spring is compressed between a cup-shaped spring guide and a tension plate that are joined together, and the spring guide can be fixed in a movable manner so that the elastic force of the spring can be adjusted using an adjustment nut. A bucket actuator for an emulsion coating machine according to claim 2. 4. The tilting mechanism consists of a carriage base that moves up and down on both the left and right sides of the screen printing plate, with left and right slide plates that can move forward and backward, and a bucket pipe installed between the left and right bucket pipe arms that are pivotally supported on the slide plates. Claims 1 to 3 of the Utility Model Registration Claims in which the cylinder rod of an inclined cylinder is fixed and pivotally supported in a swingable manner on a slide plate pipe mounted between slide plates is connected to a bucket pipe. A bucket actuation device for the emulsion coating machine according to any one of the above.