JP2001253044A - Original plate for screen printing and manufacturing method for the same, fabric tensioning machine and screen printing plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a decrease in tension due to an aging change of a screen fabric as much as possible and to improve a printing dimensional accuracy and durability in a screen printing plate. SOLUTION: The method for manufacturing the screen printing plate 12 comprises the steps of setting the screen fabric 1 to a fabric tensioning machine 2 having an infrared heater 7 by using the machine 2, placing the heater 7 on an upper surface of the fabric 1, and tensioning the fabric in four directions while heating the fabric 1. The method further comprises the steps of giving a predetermined tension to the fabric 1, then adhesively fixing the fabric 1 to a fixing frame 5 to obtain an original plate 9 for screen printing, and manufacturing the plate 12 by using the plate 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an original plate for screen printing, which has a small tension drop due to a change over time, and has excellent printing dimensional accuracy and durability, a method of manufacturing the same, a sizing machine,
And a screen printing plate.

[0002]

2. Description of the Related Art Screen printing plates are used for precision printing such as printed circuit board printing. In recent years, with the increase in the density of printed wiring, there has been a demand for improvement of high precision printing techniques using screen printing plates. . Generally, a screen printing original plate is made by weaving a screen gauze made of a fiber or the like made of a flexible polymer such as nylon or polyester, and is stretched in four directions using a gauging machine. It is manufactured by adhesively fixing it to a fixed frame made of steel.

[0003]

In the original plate for screen printing, the stretched screen gauze cannot always maintain the initial tension, and the tension gradually decreases with time. The tension drop due to the change over time of the screen gauze progresses for a certain time range, and after that, it generally becomes almost stable thereafter.

The degree of the above-mentioned tension drop differs depending on the material of the screen gauze. However, if the degree of the tension drop of the screen gauze is large, there is a problem that the printing dimensional accuracy is reduced and the durability is deteriorated. In order to achieve high-precision printing, it is necessary to minimize the drop in tension due to aging of the screen gauze at present, but no effective solution has been proposed yet.

As described above, the conventional screen printing plate is still insufficient in terms of printing dimensional accuracy and durability, and a technical development for high-precision printing has been desired.

[0006] The present invention has been made in view of the above points,
An object of the present invention is to provide a screen printing original plate capable of minimizing a tension drop due to a change in screen gauze with time, a method for manufacturing the same, and a gauze machine used for the manufacture.

Another object of the present invention is to provide a screen printing plate having excellent printing dimensional accuracy and durability.

[0008]

The present invention is characterized in that (1) a screen gauze, which is pulled by a gauging machine and heated by infrared rays and given a predetermined tension, is supported and fixed to a fixed frame. Screen printing original plate, and (2) screen gauze using a gauging machine,
In producing the original plate for screen printing, the screen gauze is heated with infrared rays and the screen gauze is pulled to give a predetermined tension, or the screen gauze is pulled and the tension is maintained after applying the predetermined tension. While heating the screen gauze with infrared,
Then, a screen gauze provided with a predetermined tension is supported and fixed to a fixed frame. (3) The screen according to the above (2), wherein the heating by infrared rays is heating by far infrared rays. (4) A tensioning device having a tension mechanism for pulling a screen gauze and applying a predetermined tension to the screen gauze, and heating the screen gauze pulled by infrared rays. (5) The gauging machine according to (4), wherein the infrared heating device is a heating device provided with a sheet heating element sheet or an infrared bulb. The gist is a screen printing plate using the screen printing original plate manufactured by the method described in the above (2).

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a screen gauze made by weaving a raw yarn. The raw gauze constituting the screen gauze 1 has a core component made of a molten liquid crystalline polyester and a sheath component. Composite fibers, nylon fibers, polyester fibers, and the like made of a blend of a flexible thermoplastic polymer and a molten liquid crystalline polyester are exemplified. FIG. 1 is a schematic plan view showing a state in which a screen gauze 1 is set on a gauging machine 2,
FIG. 2 is a schematic longitudinal sectional view showing the same state. The stretching machine 2 comprises a stretching device 15 having a pulling jig 4 provided on a base 3 so as to be movable in the horizontal direction, and an infrared heater 7 described later. A plurality of bases 3 are provided along four circumferences so that the base 3 can be pulled in all directions. Screen gauze 1 on pulling jig 4
There is provided a chuck mechanism for securely gripping the pulling jig, and as a mechanism for moving the pulling jig 4 in the horizontal direction, there are a mechanism using an air cylinder as a driving source and a mechanism using a motor as a driving source. The invention may be of any driving type.

A fixed frame 5 made of a metal material such as aluminum faces the screen gauze 1.
Is mounted on a support 5 provided on the base 3 so as to be able to move up and down. As the above-mentioned gauging machine 2, a well-known structure which has been conventionally used can be used.

In performing the stretching, an infrared heater 7 is placed on the screen 1 as shown in FIG. As the infrared heater 7, a planar heating element sheet 8 that generates infrared rays is used. The sheet heating element sheet 8 has basically the same structure as a sheet heating element sheet generally used for an electric blanket, an electric carpet, and the like, and uses a material that generates heat by applying a voltage and generates infrared rays. A heating plate formed by printing a pattern is covered with a covering material made of plastic or other suitable material. The screen gauze 1 that is in contact with the sheet heating element sheet 8 is heated by infrared rays, and the screen gauze 1 is pulled and gauged in this heated state.

At the time of tensioning the gauze, the tension jig 4 moves in the horizontal direction, that is, in the direction of the arrow in FIG.
Is pulled in four directions and becomes taut. The planar heating element sheet 8 generates infrared rays having a wavelength of 0.78 μm to 1 mm, and it is preferable to heat the screen gauze 1 with far infrared rays having a wavelength of 150 to 400 μm.

In a structure in which the pulling jig 4 is driven by an air cylinder as a pulling jig moving mechanism, the screen gauze 1 is continuously pulled by a constant force to perform gauging. On the other hand, in the case of a structure in which the pulling jig 4 is driven by a motor, the pulling jig 4
Is set in advance, and when the pulling jig 4 reaches the set moving distance, the movement of the pulling jig 4 in the pulling direction is stopped to perform gauging. In either case, the screen gauze 1 is pulled until it reaches a preset tension value. Whether or not the tension value of the screen gauze 1 has reached the set value is measured using a tension gauge, and the tension is adjusted as necessary.

The screen gauze 1 is pulled in four directions while being subjected to infrared heating by the planar heating element sheet 8 placed on the upper surface thereof. The heating temperature at this time varies depending on the material of the screen gauze 1; ~ 200 ° C is preferred. If the heating temperature is lower than 60 ° C., it is not possible to sufficiently prevent the tension drop due to the secular change of the screen gauze 1, and if the heating temperature exceeds 200 ° C., the physical strength of the screen gauze 1 is reduced, and deterioration due to heat is caused. There is a risk of causing this.
The heating temperature here refers to the surface temperature of the screen gauze 1 that is in contact with the sheet heating element sheet 8. The heating time varies depending on the material of the screen gauze 1 and the heating temperature, but is generally preferably 3 to 5 minutes. However, the heating time can be adjusted to the pulling time. That is, heating may be continued while the screen gauze 1 is being pulled by the pulling jig 4 until it reaches a predetermined tension value.

The sheet heating element sheet 8 preferably has a size large enough to cover the entire surface of the screen gauze 1, but is not necessarily limited to this, and the screen gauze necessary for attaching the screen gauze 1 to the fixed frame 5. The size corresponding to the size of 1 may be used. In other words, in heating the screen gauze 1 by the sheet heating element sheet 8 when the gauze is stretched, the entire screen gauze 1 is preferably heated. May be heated.

While heating, pull the screen gauze 1
When the tension value of the screen gauze 1 reaches a predetermined set value, the planar heating element sheet 8 is removed from the screen gauze 1 to stop heating, and then the support 6 on which the fixed frame 5 is placed is raised. In this case, after removing the planar heating element sheet 8 from the screen gauze 1 and stopping the heating, the screen gauze 1 may be pulled again. This re-pulling operation is preferably performed within the range of the set tension value. By adding the pulling operation again in this manner, the effect of preventing the screen gauze from dropping in tension can be further increased. This re-pulling operation may be performed using the same laying machine following the above-mentioned heated pulling step, or after the heated pulling step is completed, using another laying machine or a pulling device. Is also good.

As shown in FIG. 4, the support 6 is lifted and the support 6 is stopped when the fixed frame 5 comes into contact with the lower surface of the screen gauze 1. The fixed frame 5 is a square frame having an open center. As shown in FIG. 5, an adhesive is applied to the contact surface between the fixed frame 5 and the screen gauze 1 from above the mesh of the screen gauze 1, and the screen gauze 1 is bonded and fixed to the fixed frame 5. In the figure, reference numeral 1a denotes an adhesive portion. An extra portion 1b of the screen gauze 1 that protrudes outward from a portion where the screen gauze is bonded to the fixing frame 5 is cut and removed, thereby obtaining a screen printing original plate 9 as shown in FIG.

An example of manufacturing a screen printing plate using the obtained screen printing master 9 is as follows. First, a photosensitive emulsion is applied on the master 9 and a resist film is formed on the master 9 as shown in FIG. Form 10. Next, using a positive film 11 on which a printed pattern is formed, FIG.
Exposure is performed by irradiating ultraviolet rays as shown in FIG. As shown in FIG. 9, a cured portion 10a is formed on the resist film 10 corresponding to the ultraviolet transmitting portion of the positive film 11, and an uncured portion 10b is formed on the resist film 10 corresponding to the ultraviolet non-transmitting portion of the film 11. Is formed. Fig. 1
As shown in FIG. 0, the uncured portion 10b is eluted and removed, and only the cured portion 10a remains, so that the screen printing plate 12 according to the pattern is obtained.

In the above embodiment, the sheet heating element sheet 8 is brought into contact with the screen gauze 1, and the screen gauze 1 is heated by infrared rays generated from the sheet heating element sheet 8. However, as another embodiment of the present invention, Alternatively, an infrared light bulb may be used, and the screen gauze 1 may be heated by infrared light generated by the infrared light bulb. That is, in the present invention, the infrared heater 7 may be a heating device 13 having an infrared bulb described below in addition to the planar heating element sheet 8, and the heating device 13 having the latter infrared bulb may be a conventional heating device 13. A common infrared heating device used can be used.

The stretcher 2 in this embodiment is shown in FIG.
As shown in (1), a pulling device 15 having a structure similar to that described in the above embodiment, and a heating device 13 provided with an infrared light bulb installed above the pulling device 15 are provided. 14
Are a plurality of infrared light bulbs provided in the heating device 13. The screen gauze 1 is heated by the infrared rays emitted from the heating device 13, and the screen gauze 1 is pulled via the tension jig 4 in this heated state. The heating temperature is set so that the surface temperature of the screen gauze 1 becomes 60 to 200 ° C. The heating time, other heating conditions, and the pulling conditions are the same as those in the embodiment using the sheet heating element sheet 8 described above. The heating device 13 has a wavelength of 0.1 mm.
It generates infrared rays of 78 μm to 1 mm, but has a wavelength of 150 to
It is preferable to heat the screen gauze 1 with 400 μm far infrared rays.

Further, the steps after the heating and pulling are the same as those in the above embodiment. First, the support base 6 is raised, the fixing frame 5 is brought into contact with the screen gauze 1, and the fixing frame 5 is applied to the fixing frame 5 by applying an adhesive. The screen gauze 1 is adhered and fixed, and then an excess portion protruding from the fixed frame 5 of the screen gauze 1 is cut and removed. Thus, an original plate 9 for screen printing as shown in FIG. 6 is obtained.

In the above-described embodiment, the screen gauze 1 is continuously heated and simultaneously pulled until the tension value of the screen gauze reaches the set value. However, the present invention is not limited to this. Heating may not be performed until the tension value of 1 reaches the set value, and when the set value is reached, heating may be performed while pulling the screen gauze to maintain the set value. In this case, the heating temperature may be the same as the heating temperature in the above embodiment, and the heating time is preferably 3 to 5 minutes as in the above embodiment.

In each of the above-described embodiments, the infrared heating device is exposed above the screen gauze 1 and the infrared heating is performed from above the screen gauze 1. However, in another embodiment of the present invention, the infrared heating device is provided below the screen gauze 1. Face the infrared heater on the side,
Infrared heating may be performed from below the screen gauze 1,
The direction in which infrared heating is performed is arbitrary. Further, the means for supporting and fixing the screen gauze 1 to the fixing frame 5 is not limited to the case of using an adhesive, and other appropriate fixing means can be adopted.

According to the present invention, there is provided a screen gauze made of a composite fiber having a core component composed of a molten liquid crystalline polyester and a sheath component composed of a blend of a flexible thermoplastic polymer and a molten liquid crystalline polyester; The present invention can be applied to screen gauze or the like woven using fibers made of a flexible polymer such as polyester, and when applied to these screen gauze, the effect of reducing tension drop of the present invention is remarkably exhibited.

According to the present invention, when the screen gauze is laid by a gauging machine, the screen gauze is pulled while applying infrared rays to give a predetermined tension, or the screen gauze is pulled and given a predetermined tension. Since the infrared heating is performed while maintaining the tension state, the drop of the tension of the screen gauze due to the aging of the screen printing plate or the screen printing plate can be minimized. In addition, since the drop of the tension of the screen gauze can be kept as small as possible, the screen printing plate can have excellent printing dimensional accuracy and also have improved durability.

In the present invention, since the infrared heating is performed while pulling the screen gauze, the degree of bending of the yarn can be made closer to a straight line, and the elastic modulus of the screen gauze is improved. Can be kept as small as possible.

[0027]

EXAMPLES Examples 1-4 Weaving was performed using the following two types of fibers as raw yarns to obtain screen gauze.

A. Composite fiber whose core component is composed of molten liquid crystalline polyester and whose sheath component is composed of a blend of flexible thermoplastic polymer and molten liquid crystalline polyester.
μB. Polyester fiber 30 μm yarn diameter Screen gauze made of the composite fiber of A (hereinafter referred to as A screen gauze) and screen gauze made of the polyester fiber of B (hereinafter referred to as B screen gauze) were respectively covered as follows. . Examples using A screen gauze are shown as Examples 1 and 2, and cases using B screen gauze are shown as Examples 3 and 4.

Using a gauging machine (SCBS-1150 made by NBC Corporation), tension is applied to the screen gauze by an indirect tensioning method (gauze angle is 0 °), and the screen gauze is pulled in the surface direction (horizontal direction). Reaches the set values shown in Tables 1 and 2, an infrared sheet (sheet heating element sheet) is placed on a screen gauze while maintaining the tension so as to maintain the set tension value. went. As the infrared sheet, a far infrared sheet / Faver heater 09090 manufactured by Japan Special Industrial Co., Ltd. was used. The infrared heating was performed when the heating time was 3 minutes (Examples 1 and 3) and when the heating time was 6 minutes (Examples 2 and 4).

The tension was measured using a tension gauge (STG-75B manufactured by San Giken). After the pulling operation is completed, the infrared sheet is removed from the screen gauze, the fixed frame facing the screen gauze is raised, and the fixed frame is brought into contact with the screen gauze. Was applied, and the screen gauze was fixed to a fixed frame. External dimensions are 950mm in height as a fixed frame
A hollow aluminum frame having a width of 950 mm, a frame width of 30 mm and a wall thickness of 2 mm was used. Next, an extra portion of the screen gauze out of the fixed frame was cut and removed to obtain a screen printing original plate.

The tension of the resulting screen printing plate immediately after tensioning and the tension after 1, 3, 7, and 40 days had elapsed were measured. The measurement of the tension was performed by measuring the tension in the warp direction and the weft direction at the center of the fixed frame. Table 1 shows the measurement results when A screen gauze was used, and Table 2 shows the measurement results when B screen gauze was used. In these tables, IR 3 minutes and IR 6 minutes mean that infrared heating is 3 minutes each.
Minutes, and 6 minutes (the same applies to Tables 3, 4, 6, and 7).

Comparative Examples 1 and 2 The above A screen gauze and B screen gauze were covered in the same manner as in the above embodiment except that infrared heating was not carried out to obtain a screen printing original plate.

Further, in the same manner as in the above example, the tension of the obtained screen printing original plate immediately after gauging and 1 day, 3 days
The tension was measured on days 7, 7 and 40 days later. Table 1 shows the measurement results when A screen gauze was used, and Table 2 shows the measurement results when B screen gauze was used.

[0034]

[Table 1]

[0035]

[Table 2]

FIG. 12 is a graph based on the data in Table 1 above, and FIG. 13 is a graph based on the data in Table 2 above (provided that the data up to 7 days have elapsed). Is graphed). In FIG. 12, I indicates the warp direction of Example 1, II indicates the weft direction of Example 1,
III indicates the warp direction of Example 2, IV indicates the weft direction of Example 2, V indicates the warp direction of Comparative Example 1, and VI indicates the weft direction of Comparative Example 1. In FIG. 13, I indicates the warp direction of Example 3, II indicates the warp direction of Example 3, III indicates the warp direction of Example 4, IV indicates the warp direction of Example 4, and V indicates the warp direction of Comparative Example 2. And VI indicates the weft direction of Comparative Example 2.

As is clear from the above results, it is understood that the tension drop due to the aging of the screen gauze can be minimized by performing the gauze by performing the infrared heating.

Examples 5 and 6 and Comparative Example 3 A photosensitive emulsion was applied to the screen printing masters manufactured by the methods of Examples 1 to 4 and Comparative Examples 1 and 2 using an A screen gauze. Form a resist film on top,
Next, after performing ultraviolet exposure using a positive film formed with a printing pattern pattern, development processing was performed to obtain a screen printing plate according to the pattern pattern.

The screen printing plate obtained is as follows.

Example 5: Infrared heating for 3 minutes in the gauging process Example 6: Infrared heating for 6 minutes in the gauging process Comparative Example 3: No infrared heating in the gauging process Using the resulting screen printing plate, printing was performed under the following printing conditions.

Printing conditions Frame size: 950 mm × 950 mm Screen: V330 Pattern size: 550 mm × 450 mm Emulsion thickness: +10 μm Printing machine: MTV-1000C (manufactured by Microtech) Total pressure: 145 kpa Actual printing pressure: +40 kpa Gap: 3.0 mm Squeegee hardness : 70 ° Squeegee width: 600mm Squeegee: Flat squeegee Squeegee angle: 70 ° Printing speed: 200mm / sec Paste: UV paste UVR-85 manufactured by Asahi Chemical
00G Temperature / humidity: 23 ° C. 50 to 60% The tension in the warp direction and the weft direction in the printing plate (tension at the center of the screen gauze) is as follows.

[0042] The printed matter obtained by printing and the printing plate used for printing were overlapped, and measurement was made as to how much the printing position was shifted. In the measurement method, nine measurement points are determined (a, b, c, d, e, f, g, h, and i points in FIG. 14), and the printing plate and the printed matter are overlapped. At this time, the X and Y coordinates of the measurement point a and the Y coordinate of the measurement point c are set to 0 and overlap. Based on the printing plate, it is measured how much the printing position at each measurement point of the printed matter is shifted in the X direction and the Y direction.

FIG. 14 is a coordinate diagram showing a printing pattern of a printing plate. In FIG. 14, reference numeral 16 denotes a printing pattern. Measurement points a, b, c, d, e, f, g, h shown in FIG.
(The square scale is not displayed at the measurement point i), the length of one side of the large square is 150 μm, and the side of the small square is 75 μm. Although the print pattern shown in the figure is square, the actual pattern is 400 square.
It becomes a horizontally long rectangle of mm x 500 mm.

If the deviation of the printing position at each measurement point is small and the overall shape is close to a square, it indicates that the printing dimensional accuracy is high. Conversely, a large deviation of the printing position at each measurement point and a large distortion of the square shape of the overall shape indicates that the printing dimensional accuracy is low.

A total of 500 sheets were printed, the first printed matter,
The 100th printed matter and the 500th printed matter are picked up respectively, and each printed matter is superimposed on the printing plate as described above, and how much the printing positions at nine measurement points are shifted in the X direction and the Y direction, and the shift. Was measured for length. Table 3 shows the measurement results when the screen printing plate of Example 5 was used, and Table 4 shows the measurement results when the screen printing plate of Example 6 was used. Table 3 shows the measurement results when the screen printing plate of Comparative Example 3 was used. Table 5 shows the measurement results.

[0046]

[Table 3]

[0047]

[Table 4]

[0048]

[Table 5]

FIGS. 15 (Embodiment 5), FIG. 16 (Embodiment 6), and FIG. 17 (Comparative Example 3) show coordinate diagrams created based on the data in these tables. In these FIGS. 15 to 17, measurement points a, b, c, d, e, f,
The square scales indicated by g and h have a side length of 100 μm for a large square and a side length of 50 μm for a small square. In the figure, the plate is a printing plate, one is the first printed matter, and 100 is 10
The 0th printed matter, the 500th printed matter is the 500th printed matter,
These are shown below (the same applies to FIGS. 18 to 20).

According to the above measurement results, the points subjected to infrared heating in the gauze step (Examples 5 and 6) were compared with the points not subjected to infrared heating in the same step (Comparative Example 3). It can be seen that the displacement of the printing position is small, the distortion of the whole shape is small, and the printing dimensional accuracy and durability are excellent. In addition, in the case where infrared heating was performed for 6 minutes (Example 6), the displacement of the printing position at each measurement point was smaller and the distortion of the overall shape was smaller than that in the case where infrared heating was performed for 3 minutes (Example 5). From this, it can be seen that the effect is greater when the infrared heating time is extended to improve the printing dimensional accuracy and durability.

Examples 7 and 8 and Comparative Example 4 Screen printing plates were produced in the same manner as in Examples 5 and 6 and Comparative Example 3 using B screen gauze.

The screen printing plate obtained is as follows.

Example 7: Infrared heating for 3 minutes in the gauging process Example 8: Infrared heating for 6 minutes in the gauging process Comparative Example 4 No infrared heating in the gauging process Using the resulting screen printing plate, printing was performed under the following printing conditions.

Printing conditions Frame size: 950 mm × 950 mm Screen: EX380S Pattern size: 550 mm × 450 mm Emulsion thickness: +10 μm Printing machine: MTV-1000C (manufactured by Microtech) Total pressure: 170 kpa Actual printing pressure: +40 kpa Gap: 4.0 mm Squeegee hardness : 70 ° Squeegee width: 600mm Squeegee: Flat squeegee Squeegee angle: 70 ° Printing speed: 200mm / sec Paste: UV paste UVR-85 manufactured by Asahi Chemical
00G Temperature / humidity: 23 ° C. 50 to 60% The tension in the warp direction and the weft direction in the printing plate (tension at the center of the screen gauze) is as follows.

[0055] In the same manner as in Examples 5 and 6, and Comparative Example 3, a total of 500 sheets were printed, and the first print, the 100th print, and 500
Each of the sheets of the printed matter is picked up,
The length of the printing position shift was measured in the same manner as in the comparative example. Table 6 shows the measurement results obtained when the screen printing plate of Example 7 was used, and Table 7 shows the measurement results obtained when the screen printing plate of Example 8 was used. Table 8 shows the measurement results.

[0056]

[Table 6]

[0057]

[Table 7]

[0058]

[Table 8]

FIGS. 18 (Embodiment 7), FIG. 19 (Embodiment 8), and FIG. 20 (Comparative Example 4) show coordinate diagrams created based on the data in these tables. In FIGS. 18 to 20, measurement points a, b, c, d, e, f,
The square scales indicated by g and h have a side length of 150 μm for a large square and a side length of 75 μm for a small square.

According to the above measurement results, the points subjected to the infrared heating in the gauging step (Examples 7 and 8) were compared with the points not subjected to the infrared heating in the same step (Comparative Example 4) at each measurement point. It can be seen that the deviation of the printing position is small, the distortion of the whole shape is small, and the printing dimensional accuracy and durability are further improved. In the case of performing infrared heating for 6 minutes (Example 8), the displacement of the printing position at each measurement point was smaller and the distortion of the overall shape was smaller than that in the case of performing infrared heating for 3 minutes (Example 7). It can be seen that the printing dimensional accuracy and durability are excellent. This also supports that the longer the infrared heating time, the greater the effect.

[0061]

According to the present invention, when the screen gauze is stretched by a gauging machine, the screen gauze is heated by infrared rays, and the screen gauze is pulled to give a predetermined tension, or the screen gauze is pulled to give a predetermined tension. Since the screen gauze is heated by infrared rays while maintaining the pulled state after the tension is applied, it is possible to minimize the decrease in the tension of the screen gauze due to aging in the screen printing original plate or the screen printing plate. . In addition, since the drop of the tension of the screen gauze can be kept as small as possible, the screen printing plate can have excellent printing dimensional accuracy and also have improved durability.

Accordingly, when the present invention is used as a screen printing plate, the occurrence of a shift in the printing position is reduced even when a large number of sheets are printed, and as a result, there is an effect that high-precision printing is possible.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a state where a screen gauze is set on a stretcher.

FIG. 2 is a schematic longitudinal sectional view showing a state in which a screen gauze is set on a stretching machine.

FIG. 3 is a schematic longitudinal sectional view showing a state in which infrared heating is performed by a sheet heating sheet while pulling a screen gauze;

FIG. 4 is a schematic vertical cross-sectional view showing a state where a support table on which a fixing frame is mounted moves up.

FIG. 5 is a schematic vertical sectional view of a main part showing a state where the screen gauze is fixedly fixed to a fixing frame.

FIG. 6 is a plan view showing a screen printing original plate.

FIG. 7 is a schematic longitudinal sectional view showing a state in which a resist film has been applied to an original plate for screen printing.

FIG. 8 is a schematic vertical sectional view showing an exposure step.

FIG. 9 is a schematic longitudinal sectional view showing a state after completion of exposure.

FIG. 10 is a schematic longitudinal sectional view showing a state after development.

FIG. 11 is a schematic longitudinal sectional view showing another embodiment of the present invention.

FIG. 12 is a graph showing a temporal change in tension in the A screen.

FIG. 13 is a graph showing a temporal change of tension in the B screen.

FIG. 14 is a coordinate diagram showing a printing pattern of a printing plate.

FIG. 15 is a coordinate diagram showing the results of Example 5.

FIG. 16 is a coordinate diagram showing the results of Example 6.

FIG. 17 is a coordinate diagram showing results of Comparative Example 3.

FIG. 18 is a coordinate diagram showing the results of Example 7.

FIG. 19 is a coordinate diagram showing the results of Example 8.

FIG. 20 is a coordinate diagram showing results of Comparative Example 4.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 screen gauze 2 gauging machine 5 fixed frame 7 infrared heater 9 screen printing plate 12 screen printing plate 15 tensioning device

Claims (6)

[Claims] 1. A screen printing original plate, wherein a screen gauze that is pulled by a gauging machine and is given a predetermined tension by being heated by infrared rays is supported and fixed to a fixed frame. 2. A screen gauze is stretched using a gauging machine, and in producing a screen printing original plate, the screen gauze is heated with infrared rays, the screen gauze is pulled, and a predetermined tension is applied. After the screen gauze is pulled and given a predetermined tension, the screen gauze is heated by infrared rays while maintaining the tension state, and then the screen gauze given the predetermined tension is supported and fixed to a fixed frame. Manufacturing method of screen printing original plate. 3. The method for producing an original plate for screen printing according to claim 2, wherein the heating by infrared rays is heating by far infrared rays. 4. A tensioning device having a tension mechanism for pulling a screen gauze to apply a predetermined tension to the screen gauze, and an infrared heater for heating the screen gauze being pulled with infrared rays. A gauging machine characterized by consisting of: 5. The gauging machine according to claim 4, wherein the infrared heater is a heating device provided with a sheet heating element sheet or an infrared light bulb. 6. A screen printing plate using the screen printing original plate produced by the method according to claim 2.