JP2022033282A - Combination screen plate for contact printing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a combination screen plate that is suitable for contact printing, can print with high accuracy, and has high durability.

SOLUTION: A combination screen plate 1 for contact printing is provided with a frame 2, a printing screen 3, and a support 4 in which an outer periphery part of a printing screen is connected with an inner periphery part and the outer periphery part is fixed to the flame. The printing screen 3 is a metal screen, and the support 4 is made of a metal plate having small elongation in a plane direction and high strength small in a displacement amount in a thickness direction during squeezing, compared with the printing screen. As a result, it is possible to suppress the elongation in the plane direction of the printing screen 3 during the contact printing, and a combination screen plate 1 having high accuracy and durability can be obtained.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a combination screen plate used for contact screen printing.

In screen printing, the screen is becoming thinner to support fine line printing, and in order to use a low-strength and expensive screen, the combination structure is compared with the direct-paste structure in which the printing screen is directly attached to the frame. The screen version of is the mainstream. The combination screen plate is a plate in which the periphery of the printing screen is fixed to a frame via a support.

In the case of the combination screen plate, since the load on the printing screen due to the printing pressure during printing is absorbed by the support, a synthetic fiber screen having more elasticity than the printing screen is generally used as the support (for example, Patent Document). 1).

However, due to the miniaturization and multi-functionalization of electronic components in recent years, the line width of the circuit has become finer, and there is an increasing demand for screen printing with higher printing coordinate accuracy. For example, in a multilayer product such as a multilayer ceramic capacitor, a printing accuracy of ± 20 μm or less is required. For this reason, the combination screen plate using the support made of the conventional synthetic fiber screen has a problem that the target printing accuracy cannot be achieved.

In Patent Document 2, a rigid screen in which a braided portion of a screen mesh in which stainless steel fibers are braided is coated with a plating film is used as a printing screen, and the support screen is coarser than the printing screen and has a wire diameter. A combination screen version using a rigid screen in which the surface of a braided portion of a screen mesh braided with thick stainless steel fibers is coated with a plating film is disclosed. In this case, since the support screen has a smaller elongation than the synthetic fiber screen, the printing accuracy can be improved.

However, since the stainless steel mesh is used as the support, the restoration of the position coordinates after being deformed by the printing pressure of the squeegee is not so good, and the printed figure is easily distorted. As a result, it is difficult to obtain the desired printing accuracy. Further, since the support has a mesh structure like the printing screen and needs to be plated, it is expensive. In addition, a portion of the paste (printing ink) may enter the joints of the support screen, which may adversely affect print quality.

Japanese Patent No. 5529395 JP-A-2007-62225 Japanese Unexamined Patent Publication No. 8-112891 Japanese Unexamined Patent Publication No. 5-254087

An object of the present invention is to provide a combination screen plate suitable for contact printing, capable of high-precision printing and having high durability.

Before explaining the significance of the present invention, first, contact printing will be described. Screen printing is roughly divided into an off-contact method and a contact method. The off-contact method is a printing screen in which a printed matter is placed on a horizontally supported printing stage, and the printing screen of the screen plate is held with a gap between the printed matter and the surface of the printed matter. By supplying the paste on top and moving the squeegee horizontally while pressing it against the printing screen, the printing screen is bent and the pattern formed on the printing screen is transferred to the printed matter.

However, in the printing method by the off-contact method, the printing screen is stretched downward for each squeezing, and at the same time, it is stretched in the plane direction due to the frictional resistance with the squeegee. As a result, there is a problem that the print misalignment of the pattern formed on the surface of the printed matter tends to be large, and the durability of the printing screen tends to decrease.

On the other hand, in the contact method, the surface of the printed matter and the printing screen are kept in almost contact state (however, the distance between the printing screen and the printed matter is not always 0), and the squeegee is moved horizontally. Therefore, the pattern formed on the printed screen can be transferred to the printed matter with almost no bending in the thickness direction of the printed screen. Such a contact-type printing method has an advantage that printing misalignment and shape deterioration are reduced because the printing screen is less stretched in the thickness direction than the off-contact method.

As described in Patent Documents 3 and 4, a printing stage having an outer peripheral surface having an arcuate cross section is used, and the surface of the printed matter adsorbed on the outer peripheral surface corresponds to the tip position of the squeegee on the back surface of the printing screen. A contact-type printing method has also been developed in which the printing stage is rotated in synchronization with the movement of the squeegee while making contact with the position. When a printing stage having such an arcuate outer peripheral surface is used, the printing screen and the stage partially come into contact with each other in synchronization with the movement of the squeegee, so that the printing screen is printed as compared with the flat printing stage. It is possible to suppress the elongation of the printing screen when it is peeled off from the stage, and there is an advantage that the printing accuracy and the durability of the printing screen are improved.

However, even in the contact-type printing method using a printing stage having an arcuate outer peripheral surface, elongation in the plane direction of the printing screen due to frictional resistance with the squeegee cannot be suppressed.

Therefore, in the combination screen plate of the present invention, a metal screen is used as the printing screen, a metal plate having a higher strength than the printing screen is used as the support, and the periphery of the printing screen is held by this metal plate. It is characterized by. Due to the reinforcing effect of the support, it is possible to suppress the elongation of the printing screen in the plane direction due to friction with the squeegee, the coordinate reproducibility of the position is better than that of the conventional combination screen plate, and high-precision printing becomes possible. Since the support is a metal plate, it can hardly be deformed in the thickness direction, but it is not necessary for the support to be deformed in the thickness direction because of contact printing. The screen may stretch in the thickness direction when the screen and the stage are peeled off, but since the periphery of the screen is supported by a high-strength metal plate, the stretching of the printing screen in the thickness direction can be suppressed. As a result, high-precision printing is possible, and a durable combination screen plate can be provided.

As the printing screen, a metal screen is used, but a known screen such as a SUS screen or a tungsten screen can be used. The printing screen is not limited to a woven structure (mesh) made of metal fibers, and may be a metal mask. In particular, a high-precision screen called a high mesh, in which metal wires are finely woven and finely woven, is preferable.

The "metal plate" as a support is not a mesh-like or fibrous structure such as a metal mask or a mesh, but a flat plate. It does not necessarily have to have a constant thickness, but a flat plate having a constant thickness has a constant strength, is easy to process, and is inexpensive. The metal material of the support preferably has a Young's modulus of 70 GPa or more and 640 GPa or less, and more preferably a Young's modulus of 150 GPa or more and 430 GPa or less. When the printing screen is fixed to the lower surface side of the support, the thickness of the support is preferably 3 mm or less, particularly preferably 1 mm or less, in order to reduce the space at the step between the support and the printing screen. Further, it is desirable that the thickness is 0.1 mm or more so that deformation due to friction with the squeegee can be suppressed. By supporting a metal printing screen by using such a thin and high-strength support, it is possible to realize a screen printing plate having excellent printing workability and high printing accuracy (for example, ± 20 μm or less). Even if a low-strength screen such as a high mesh is used as the printing screen, the coordinate reproducibility of the printed figure is high.

The coefficient of thermal expansion of the support is preferably 1 × 10 ^-6 / ° C or higher and 23 × 10 ^-6 / ° C or lower, and more preferably 4 × 10 ^-6 / ° C or higher and 11 × 10 ^-6 / ° C or lower. Since the coefficient of thermal expansion is small, it is possible to suppress variations in printing accuracy due to temperature changes. Since both the printing screen and the support are made of metal, they are not easily affected by changes in humidity, swelling due to the solvent contained in the paste, or chemical changes. Therefore, it is superior in durability as compared with a printing screen and a support made of a synthetic fiber screen. As such a high-strength, low-thermal expansion, non-moisture-absorbing single plate, for example, a stainless steel plate, an aluminum plate, a superinvar, a cemented carbide, a copper plate, a high-strength steel plate and the like can be generally used.

It is inexpensive because the support is a metal flat plate rather than a screen. If the support is deformed by multiple uses, only the support can be replaced if necessary. Further, since the support is not a mesh structure but a metal flat plate, a part of the paste does not enter the joints of the support as in Patent Document 2.

The printing screen is joined to the support with a predetermined tension, and the support is preferably a metal plate having a thickness capable of holding a non-deformed state with respect to the tension of the printing screen. There are materials having various Young's modulus in the metal plate, but even if the Young's modulus is high, if it is an ultra-thin plate material, it may not be possible to suppress bending. Therefore, as a support, it is preferable to use a metal plate having a thickness capable of holding a non-deformed state (flat plate state) with respect to the tension of the printing screen.

The printing screen is preferably joined to the printing stage side of the support. In screen printing, the back side of the combination screen plate comes into contact with the stage (or the printed matter held on the stage). If the printing screen is joined to the top side of the support, the back side of the rigid support may interfere with the stage and damage the stage. In addition, the printing screen may be stretched by the thickness of the support, and coordinate distortion may occur. Therefore, by joining the printing screen to the back surface side of the support, that is, the printing stage side, it is possible to prevent interference between the support and the stage and suppress the elongation of the printing screen due to the thickness of the support.

It is desirable to apply the combination screen plate for contact printing according to the present invention to a printing apparatus using a printing stage having an arcuate outer peripheral surface as in Patent Document 3. In this case, since the contact method is used, displacement of the printing screen in the thickness direction can be suppressed, and the printing screen is less likely to be displaced in the plane direction due to the reinforcing effect of the support, so that high printing accuracy can be achieved. Furthermore, since the printing screen and the stage partially come into contact with each other in synchronization with the movement of the squeegee, the elongation of the printing screen when the printing screen is peeled off from the printing stage can be suppressed, and the printing accuracy and the printing screen can be improved. Durability is further improved.

As described above, according to the present invention, a metal screen is used as the printing screen, a metal plate having a higher strength than the printing screen is used as the support, and the periphery of the printing screen is held by this metal plate. Therefore, due to the reinforcing effect of the support, it is possible to suppress the elongation of the printing screen in the plane direction due to friction with the squeegee, and the position coordinate reproducibility is better than the conventional combination screen plate, enabling high-precision printing. .. Further, since the metal plate is less deteriorated after being used many times than the screen, it is possible to realize a combination screen plate having excellent durability. In the case of a support made of a metal plate, the support does not stretch in off-contact printing, and the printing screen cannot contact the printed matter, so paste transfer cannot be performed and printing cannot be performed well. High-definition printing is possible.

FIG. 3 is a plan view and a sectional view taken along line AA showing the first embodiment of the combination screen plate for contact printing according to the present invention. SUS430 plate, stainless steel screen, polyester screen SS curve. It is a figure which compared the coordinate restoration property before and after printing of the conventional example which used the polyester screen as a support, and the present invention which used a SUS430 board. It is a figure which compared the temperature and humidity change between the conventional example which used the polyester screen as a support, and the present invention which used a SUS430 plate. It is sectional drawing of the contact type printing apparatus to which the combination screen plate shown in FIG. 1 is applied. It is a figure which shows the printing accuracy of the combination screen plate which concerns on this invention.

FIG. 1 shows a first embodiment of a combination screen plate for contact printing according to the present invention. The combination screen plate 1 includes a frame 2, a printing screen 3, and a support 4 whose inner peripheral portion is joined to the outer peripheral portion of the printing screen 3 and whose outer peripheral portion is fixed to the frame 2.

The frame 2 is formed in a rectangular frame shape by a thick member, and is formed in a size such that the squeegee can move inside the frame 2. The material of the frame 2 is made of a metal material such as aluminum or an aluminum alloy. In the conventional screen printing plate, the frame 2 has a role of holding the tension of the printing screen 3, but in this embodiment, the support 4 holds the tension of the printing screen 3. Therefore, the support 4 has a role of firmly supporting the printing screen 3 on the frame 2.

As the printing screen 3, a metal mesh or a metal mask is used. The metal mesh is woven with fine metal fibers, and for example, SUS mesh, tungsten mesh, high-strength steel mesh and the like are used. For example, a metal mesh in which a printed figure (not shown) is patterned with a photosensitive resin is used. As the metal mesh, a high-precision screen in which the metal wire is finely woven, which is called a high mesh, is particularly preferable. The metal mask is a porous metal mask in which a printing pattern is formed on a metal foil or a metal plate by, for example, etching, laser processing, electric casting, or the like.

The support 4 is made of a metal veneer having higher strength than the printing screen 3, and its outer peripheral portion is fixed to the lower surface of the frame 2 by adhesion or the like. A square opening 4a is formed in the center of the support 4, and the outer peripheral portion of the printing screen 3 is fixed around the opening 4a in a state where a predetermined tension is applied. In particular, it is desirable that the printing screen 3 is fixed to the lower surface side of the support 4, that is, the stage side. The reason is that when the screen plate comes into contact with the printing stage, the printed matter on the stage is prevented from being damaged by the interference with the support plate 4. As a method of fixing the support 4 and the frame 2 and a method of fixing the support 4 and the printing screen 3, a joining method other than adhesion is also possible.

It is desirable that the size of the support 4 satisfies the following conditions. That is, in order to print without variation, a run-up distance of the squeegee is required, and it is desirable that the width W1 on the front side in the squeegee movement direction of the support 4 has a dimension that can secure a distance until the rolling of the paste becomes stable. Further, if the paste pool is caught on the printed portion, it causes bleeding. Therefore, it is desirable that the width W2 on the rear side of the support 4 in the squeegee moving direction has a dimension that can secure a margin portion of the paste pool. Further, since the squeegee end is loaded, it is necessary to separate it from the printing portion, and in order to secure a margin in the width direction of the squeegee, the width D of the opening 4a of the support 4 in the direction orthogonal to the squeegee movement direction is set. It is desirable that the size is shorter than the total length of the squeegee.

The support 4 is formed of a high-strength metal plate having a smaller elongation in the plane direction during squeezing and a smaller displacement amount in the thickness direction than the printing screen 3. In particular, it is preferable to use a metal plate having a thickness capable of maintaining a non-deformed state with respect to the tension of the printing screen 3. The material and thickness of the support 4 preferably have a Young's modulus of 70 GPa or more and 640 GPa or less and a thickness of 0.1 mm or more and 3 mm or less, and a Young's modulus of 150 GPa or more and 430 GPa or less and a thickness of 0.1 mm or more and 1 mm or less. preferable. The coefficient of thermal expansion of the support 4 is preferably 1 × 10 ^-6 / ° C. or higher and 23 × 10 ^-6 / ° C. or lower, and more preferably 4 × 10 ^-6 / ° C. or higher and 11 × 10 ^-6 / ° C. or lower. As such a metal plate having high strength and low thermal expansion, for example, a stainless plate, a copper plate, an aluminum plate, a superinvar, a cemented carbide, a high-strength steel plate and the like can be generally used.

The function of the support in the conventional combination screen plate is to minimize the deformation of the printing screen by bearing the deformation of the plate that occurs during printing by its own elongation. On the other hand, the function of the support in the combination screen plate of the present invention is not to bear the deformation at the time of printing by its own elongation, but to reinforce the circumference of the printing screen and minimize the deformation of the printing screen. Is. Therefore, a high-strength metal plate is used for the support 4. The thickness of the support 4 is arbitrary, but if the end of the squeegee is designed to slide on the support 4, the space at the step between the support 4 and the printing screen 3 is reduced. In order to suppress damage to the squeegee, the thickness of the support 4 is preferably 3 mm or less, particularly preferably 1 mm or less. Further, it is desirable that the thickness is 0.1 mm or more so that deformation due to sliding friction with the squeegee can be suppressed. It is also possible to suppress damage to the squeegee by filling the stepped portion with an adhesive or the like.

Table 1 is a comparison table of the characteristics of each material when a SUS430 plate, Al, Invar material, and cemented carbide are used as an example of the support 4, and when a polyester screen, which is a conventional general support, is used. Is. In the case of a polyester screen, the shape is reticulated, the Young's modulus is low, and the thermal expansion coefficient and the humidity expansion coefficient are large, so that the coordinate reproducibility is low and the effect of suppressing load deformation, temperature and humidity changes is low. On the other hand, when the material of the support is SUS430 plate, Al, Invar material, and super hard alloy, the Young's modulus is several tens of times higher than that of the polyester screen, the coefficient of thermal expansion and the coefficient of humidity expansion are small, and the shape. Since the plate is in the shape of a plate, the coordinate reproducibility is high, and the effect of suppressing load deformation, temperature change, and humidity change is high. As a result, there is an effect that the printing accuracy is improved.

FIG. 2 shows a SUS430 plate (thickness 0.4 mm), a stainless steel screen (# 150-61: wire diameter 61 μm mesh number 150 lines / inch), a resin screen (polyester screen # 230-48: wire diameter 48 μm mesh number 230 lines / inch). inch) SS curve. As is clear from FIG. 2, it can be seen that the strength of the SUS430 plate is overwhelmingly higher than that of the resin screen as well as the stainless steel screen of the same material. Therefore, the deformation of the support during printing and the deformation of the printing screen can be effectively suppressed.

FIG. 3 compares the coordinate resilience before and after printing between the conventional structure and the structure of the present invention. In the conventional structure, a polyester screen having an outer dimension of 320 mm □, an inner dimension of 210 mm □, and # 230-48 was used as the support, and a tungsten screen was used as the printing screen. In the structure of the present invention, a SUS430 plate having an outer dimension of 320 mm □, an inner dimension of 210 mm □, and a thickness of 0.4 mm was used as the support, and the same tungsten screen as the conventional example was used as the printing screen. The printing method was a contact method, and the conditions were the same. The coordinate deviation is the difference between the coordinates before and after printing.

As is clear from FIG. 3, the coordinate deviation before and after printing was ± 5 μm in the conventional structure, and the tendency of the deviation was also different over the entire circumference. On the other hand, the coordinate deviation of the structure of the present invention was ± 2 μm, and the coordinate position was close to the initial position. As a result, it can be seen that when the SUS430 plate is used as a support, the coordinate restoration before and after printing is improved as compared with the conventional case.

FIG. 4 compares the coordinate resilience due to changes in temperature and humidity between the conventional structure and the structure of the present invention. The screen version used is the same as in FIG. In the case of the conventional structure, the deformation due to temperature change is 1.4 μm / ° C. 68 mm, the deformation due to humidity change is −2.1 μm / 10% · 68 mm, and the deformation is non-linear, whereas the present invention. In the structure, the deformation due to the temperature change was 1.2 μm / ° C. 68 mm, the deformation due to the humidity change was −1.2 μm / 10% · 68 mm, and the deformation was also linear. Therefore, by changing the support from a polyester screen to a SUS430 plate, the support becomes a low thermal expansion / non-hygroscopic material, and distortion due to temperature and humidity changes can be suppressed.

FIG. 5 shows an example of the printing apparatus according to the present invention. In this example, the combination screen plate 1 shown in FIG. 1 is applied to a contact-type printing apparatus. On the upper side of the combination screen plate 1, a squeegee 10 sliding on the printing screen 3 and the support 4 is attached to a moving mechanism 11 that moves in the horizontal direction. The squeegee 10 is obliquely pressed against the printing screen 3 and the support 4 with a predetermined printing pressure. It is desirable that the total length (length in the direction perpendicular to the paper surface) of the squeegee 10 is larger than the width of the opening 4a of the support 4 (D in FIG. 1). In this case, since the end portion of the squeegee 10 to which the load is most applied slides on the support 4, the load applied to the printing screen 3 can be reduced. Further, the width of the support 4 on the front side in the squeegee movement direction (W1 in FIG. 1) is the approach distance of the squeegee until the rolling of the paste stabilizes, and the width on the rear side in the squeegee movement direction of the support 4 (FIG. 1). W2) is a margin portion of the paste pool.

Below the combination screen plate 1, a printing stage 12 having an outer peripheral surface 12a having an arcuate cross section is arranged. The width direction dimension (dimension in the direction perpendicular to the paper surface) of the printing stage 12 is larger than the width D of the opening 4a of the support plate 4. A printed matter (not shown) such as a ceramic green sheet is adsorbed and held on the outer peripheral surface of the stage 12. The stage 12 has a rotation mechanism (not shown) so as to rotate in the arrow direction in synchronization with the movement of the squeegee 10 while keeping the front surface of the printed matter in contact with the position corresponding to the tip position of the squeegee 10 on the back surface of the printing screen 3. It is attached. The outer peripheral surface having an arcuate cross section may be an elliptical outer peripheral surface having an arcuate cross section. Since the detailed configuration is as described in Patent Document 4, it is omitted here.

In FIG. 5, the two-dot chain line indicates the start state of printing, the one-dot chain line indicates the intermediate state, and the solid line indicates the end state. The squeegee 10 moves horizontally in the direction of the arrow while pressing the paste (printing ink) P against the printing screen 3. Since the top of the arcuate outer peripheral surface 12a of the stage 12 partially contacts the position corresponding to the tip position of the squeegee 10 on the back surface of the printing screen 3, when the paste P is peeled off from the stage 10 due to the viscosity of the paste P. The elongation of the printing screen 3 can be suppressed. Further, since the periphery of the printing screen 3 is supported by the high-strength support 4, it is possible to suppress or prevent the printing screen 3 from stretching in the plane direction due to friction with the squeegee 10.

In this way, since the stage 12 rotates while partially contacting the position corresponding to the tip position of the squeegee 10 on the back surface of the printing screen 3, the printing screen 3 at the time of peeling between the printing screen 3 and the stage 12 Deformation can be effectively suppressed. Further, since the periphery of the printing screen 3 is held by the support 4 which is a high-strength metal plate, it is possible to suppress the elongation of the printing screen 3 in the plane direction due to friction with the squeegee 10. Furthermore, it is possible to suppress the elongation of the printing screen 3 in the thickness direction, which is a feature of contact printing.

FIG. 6 shows the results of screen printing under the following conditions using the printing apparatus shown in FIG. The plate structure and printing conditions are as follows.
Frame: Aluminum frame support with outer dimensions 364 mm, inner dimensions 320 mm □, thickness 16.5 mm: External dimensions 364 mm □, inner dimensions 210 mm □, thickness 0.4 mm SUS430 board Printing screen: High mesh tungsten screen (# 430) -13: Wire diameter 13 μm Number of meshes 430 / inch)

When contact-type screen printing was performed using a stage with an arc-shaped cross section under the above conditions, the printing accuracy of ± 15 μm required for a multilayer product could be stably achieved. Therefore, the effect of the combination screen version according to the present invention was proved. By using such a high-precision combination screen plate, high-density printing becomes possible, and a high-performance multilayer product can be manufactured.

The above embodiment shows only a few examples of the present invention, and can be changed without departing from the spirit of the present invention. In the above embodiment, SUS430 is used as the material of the support, but other stainless steel plates may be used, and other metal plates such as high-strength steel plates, aluminum plates, copper plates, and other alloys may be used. You can also do it. It is better to set the thickness of the support according to Young's modulus.

In the printing apparatus of FIG. 5, a stage having a fan-shaped cross section is used as the stage, but it may be a semi-cylindrical stage or a cylindrical stage, and may be a stage having a convex curved surface. Further, the combination screen plate of the present invention is not limited to a contact-type printing method using a stage having a convex curved surface as shown in FIG. 5, but is also used for line peeling printing and a contact-type printing method using a flat plate-shaped stage. Can also be applied.

[remarks]
(1) In a contact printing combination screen plate comprising a frame, a printing screen, and a support whose inner peripheral portion is joined to the outer peripheral portion of the printing screen and whose outer peripheral portion is fixed to the frame.
The printing screen is a metal screen.
The support is a combination screen plate for contact printing, which is formed of a high-strength metal plate having a smaller elongation in the plane direction during squeezing and a smaller displacement in the thickness direction than the printing screen.
(2) The printing screen is joined to the support with a predetermined tension.
The support is a combination screen plate for contact printing, which is a metal plate having a thickness capable of holding a non-deformed state with respect to the tension of the printing screen.
(3) The support is a combination screen plate for contact printing, which is a metal plate having a Young's modulus of 70 GPa or more and 640 GPa or less and a thickness of 0.1 mm or more and 3 mm or less.
(4) The support is a combination screen plate for contact printing, which is a metal plate having a thickness of 0.1 mm or more and 1 mm or less.
(5) The support is a combination screen plate for contact printing, which is a metal plate having a coefficient of thermal expansion of 1 × 10 ^-6 / ° C. or higher and 23 × 10 ^-6 / ° C. or lower.
(6) The printing screen is a contact printing combination screen plate characterized in that it is joined to the printing stage side of the support.
(7) The combination screen version for contact printing and
A squeegee that moves horizontally while pressing the paste supplied on the printing screen of the combination screen plate, and
It has an outer peripheral surface with an arcuate cross section, and the surface of the printed matter adsorbed on the outer peripheral surface is in contact with the position corresponding to the tip position of the squeegee on the back surface of the printing screen in synchronization with the movement of the squeegee. A printing device equipped with a rotating printing stage.

1 Combination screen plate 2 Frame 3 Printing screen 4 Support 4a Opening 10 Squeegee 12 Stage 12a Arc-shaped outer peripheral surface P paste

Claims (7)

In a contact printing combination screen plate comprising a frame, a printing screen, and a support whose inner peripheral portion is joined to the outer peripheral portion of the printing screen and whose outer peripheral portion is fixed to the frame.
The printing screen is a metal screen.
The support is a combination screen plate for contact printing, which is formed of a high-strength metal plate having a smaller elongation in the plane direction during squeezing and a smaller displacement in the thickness direction than the printing screen. The printing screen is joined to the support with a predetermined tension.
The combination screen plate for contact printing according to claim 1, wherein the support is a metal plate having a thickness capable of holding a non-deformed state with respect to the tension of the printing screen. The combination screen plate for contact printing according to claim 1 or 2, wherein the support is a metal plate having a Young's modulus of 70 GPa or more and 640 GPa or less and a thickness of 0.1 mm or more and 3 mm or less. The combination screen plate for contact printing according to claim 3, wherein the support is a metal plate having a thickness of 0.1 mm or more and 1 mm or less. The combination screen plate for contact printing according to any one of claims 1 to 4, wherein the support is a metal plate having a coefficient of thermal expansion of 1 × 10 ^-6 / ° C. or higher and 23 × 10 ^-6 / ° C. or lower. .. The combination screen plate for contact printing according to any one of claims 1 to 5, wherein the printing screen is joined to the printing stage side of the support. The combination screen version for contact printing according to any one of claims 1 to 6 and the combination screen version.
A squeegee that moves horizontally while pressing the paste supplied on the printing screen of the combination screen plate, and
It has an outer peripheral surface with an arcuate cross section, and the surface of the printed matter adsorbed on the outer peripheral surface is in contact with the position corresponding to the tip position of the squeegee on the back surface of the printing screen in synchronization with the movement of the squeegee. A printing device equipped with a rotating printing stage.

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