JP4650426B2 - Screen printing apparatus and screen printing method - Google Patents

Description

  The present invention relates to a screen printing apparatus and a screen printing method, and more particularly to a screen printing apparatus and a screen printing method used when, for example, a conductive paste is printed on a ceramic green sheet or the like.

  For example, in a manufacturing process of a multilayer ceramic electronic component, when a conductive paste is printed on a laminated ceramic green sheet to form an internal electrode pattern, a screen printing method is used as a method for obtaining a predetermined graphic pattern (printed graphic). Is widely used.

FIGS. 7A, 7B and 7C show an example of a conventional screen printing method. The screen printing apparatus used here includes a printing mask 51 having a predetermined pattern as an opening, a squeegee 52 that moves while pressing a printing paste 54 placed on the printing mask 51, and a cross section of the upper surface. A printing stand 53 that has an arc shape and rotates (rotates) while moving along a horizontal direction that is the same as the moving direction of the squeegee 52 is provided.
Note that the curvature of the upper surface of the printing stand 53 is constant except for an uneven portion (not shown) provided for a gripping mechanism of the printing sheet 55.

  When printing is performed using this screen printing apparatus, as shown in FIG. 7A, the printing sheet 55 is placed on a printing table 53 having a circular cross-sectional shape on the upper surface, and the printing sheet is printed. After being fixed on the printing stand 53 in a curved state 55 and lightly contacting the printing mask 51, the tip of the squeegee 52 is the sheet contact line of the printing mask 51 as shown in FIGS. The print paste 54 is printed on the printing sheet 55 by moving and rotating the printing stand 53 in accordance with the movement of the squeegee 52 (see Patent Document 1).

  By the way, when printing on a long printing sheet, printing and conveyance of the printing sheet are repeated, and a printing pattern is formed on the printing sheet one after another. At this time, as shown in FIG. 8, the portion of the margin (gap between print areas) G formed between the print areas (areas printed in one shot) cannot be used as a product, so that the material utilization efficiency is increased. Therefore, it is required to reduce the gap G between the print areas.

  However, as shown in FIG. 8, in the conventional screen printing method, there is a portion where the interval between the print mask 51 and the printing sheet 55 is narrow, and when the interval between print areas (inter-print area gap) G is small, There is a problem that the undried print pattern comes into contact with the print mask and the print pattern is destroyed.

  Therefore, in order to prevent the print pattern from coming into contact with the print mask 51 when an undried print pattern passes, the gap between print areas (gap between print areas) G must be set large. There is a problem that the effective use of the print sheet 55 is hindered.

Further, for example, as shown in FIG. 9, by using a printing stand 53 with a small radius of curvature, it becomes easy to secure the interval between the printing mask 51 and the printing sheet 55, and the gap between printing areas can be reduced. Become. However, this method has the following problems.

(1) When the radius of curvature is large, a suction port is provided on the printing stand and the printing sheet can be fixed by suction. However, when the radius of curvature is small, air leakage occurs when the printing sheet is fixed. Therefore, the process of fixing the printing sheet to the printing stand becomes complicated. A method of holding and fixing the printing sheet by applying tension to the printing sheet is also conceivable, but it is not easy to apply sufficient tension without contacting the undried print pattern portion after printing, and it is complicated. A transport system is required.

(2) In the case of using a printing stand having a small radius of curvature, in order to prevent contact between the printed pattern after printing and the printing mask, it is necessary to draw the printed sheet after printing obliquely downward. When supplying to a drying furnace in a subsequent process, it may be necessary to install the drying furnace diagonally, or a complicated transport system may be used to change the transport direction of the printed sheet after printing. There is a problem that it becomes necessary and causes a complicated process and an increase in cost.
JP-A-8-112891

  The present invention solves the above-mentioned problem, and prevents the contact between the printing mask and the printing material without increasing the interval (gap between printing areas) between the printing areas (areas printed in one shot). An object of the present invention is to provide a screen printing apparatus and a screen printing method capable of effectively using a printing material while ensuring printing accuracy.

In order to solve the above problems, the screen printing apparatus of the present invention (Claim 1)
The surface to be printed is placed and the surface facing the printing mask has a convex curved surface shape, and is configured to be rotatable so that a predetermined area can be directly opposed to the printing mask. A printing stand;
A printing mask disposed on the printing table;
A squeegee that slides on the print mask while pressing the print mask against the substrate placed on the printing stand;
When the squeegee slides on the printing mask, the printing stand rotates, and an area to be printed on the substrate placed on the surface of the printing stand facing the printing mask is to be printed. The printing mask is brought into contact with a region corresponding to the position where the squeegee slides, and printing is performed by pressing the printing paste from the printing mask toward the substrate by the pressing force of the squeegee. In the screen printing apparatus configured in
The radius of curvature (R1) of the area corresponding to the squeegee sliding portion where the squeegee slides on the printing mask of the printing stand is the end of sliding of the squeegee on the printing mask of the printing stand. It is characterized by being larger than the radius of curvature (R2) of the region corresponding to the squeegee non-sliding portion adjacent to the printing end portion and / or the printing start portion where the squeegee sliding starts.

The screen printing apparatus of the present invention (Claim 2)
The surface to be printed is placed and the surface facing the printing mask has a convex curved surface shape, and is configured to be rotatable so that a predetermined area can be directly opposed to the printing mask. A printing stand;
A printing mask disposed on the printing table;
A squeegee that slides on the print mask while pressing the print mask against the substrate placed on the printing stand;
When the squeegee slides on the printing mask, the printing stand rotates, and an area to be printed on the substrate placed on the surface of the printing stand facing the printing mask is to be printed. The printing mask is brought into contact with a region corresponding to the position where the squeegee slides, and printing is performed by pressing the printing paste from the printing mask toward the substrate by the pressing force of the squeegee. In the screen printing apparatus configured in
In a region corresponding to a squeegee non-sliding portion adjacent to a printing end portion at which the sliding of the squeegee on the printing mask ends and / or a printing start portion at which the sliding of the squeegee starts. It is characterized by notches.

The screen printing apparatus of the present invention (Claim 3)
The surface to be printed is placed and the surface facing the printing mask has a convex curved surface shape, and is configured to be rotatable so that a predetermined area can be directly opposed to the printing mask. A printing stand;
A printing mask disposed on the printing table;
A squeegee that slides on the print mask while pressing the print mask against the substrate placed on the printing stand;
When the squeegee slides on the printing mask, the printing stand rotates, and an area to be printed on the substrate placed on the surface of the printing stand facing the printing mask is to be printed. The printing mask is brought into contact with a region corresponding to the position where the squeegee slides, and printing is performed by pressing the printing paste from the printing mask toward the substrate by the pressing force of the squeegee. In the screen printing apparatus configured in
A portion of the printing stand corresponding to a printing end portion where the sliding of the squeegee ends on the printing mask and / or a printing start portion where the sliding of the squeegee starts is an end portion. It is characterized by

The screen printing method of the present invention (Claim 4) is:
A screen printing method using the screen printing apparatus according to claim 1,
Placing the substrate on the printing table;
Disposing the printing mask on the substrate to be printed placed on the printing table;
Supplying a printing paste on the printing mask;
While the squeegee is in contact with the printing mask, it is slid on the printing mask, and the printing stand is rotated so that the substrate placed on the surface of the printing stand facing the printing mask is placed. An area of the printed material to be printed is brought into contact with an area corresponding to a position where the squeegee slides on the printing mask, and the printing paste is removed from the printing mask by the pressing force of the squeegee. And a step of performing printing by extruding toward the surface.

A screen printing apparatus according to the present invention (Claim 1) has a convex curved surface, and is configured to be rotatable so that a predetermined region can be directly opposed to a printing mask. , A printing mask disposed on the printing table, and a squeegee that slides on the printing mask while pressing the printing mask against the substrate to be printed. The squeegee slides on the printing mask. When the printing table is rotated, the area to be printed on the printing material placed on the surface facing the printing mask of the printing table is at the position where the squeegee of the printing mask slides. In a screen printing apparatus configured to abut on a corresponding area and print by pressing a printing paste from a printing mask toward a substrate by pressing force of the squeegee, the squeegee of the printing stand is placed on the printing mask. Sliding The radius of curvature (R1) of the region corresponding to the squeegee sliding portion that, print end portion of the printing stage, the sliding of the squeegee on a printing mask ends, and / or print start sliding of the squeegee is started Since the radius of curvature (R2) of the area corresponding to the squeegee non-sliding part adjacent to the part is larger, the interval between the print areas (area printed in one shot) (gap between print areas) should be increased. In addition, it is possible to prevent a contact between the printing mask and the printing material by promptly securing a sufficient space between the printing mask and the printing material after the printing is completed. Therefore, it is possible to prevent the printed pattern from being damaged after printing due to the contact between the printing mask and the substrate, and to effectively use the substrate while maintaining high printing accuracy.

  In the present invention, the fact that the squeegee slides on the printing mask means that the relative positional relationship between the squeegee and the printing mask changes, and the squeegee moves while the printing mask is stationary. The concept is not limited to the case, and includes a case where the print mask moves while the squeegee is stationary, and a case where both the squeegee and the print mask move.

In the present invention, the printed material is a long sheet-shaped printed material, and after the printing process to one area is completed, the printed material is conveyed in a predetermined direction and then printed in the next area. In case
(a) When the sliding direction (printing direction) of the squeegee is the same as the conveyance direction of the substrate, the radius of curvature (R1) of the area corresponding to the squeegee sliding portion of the printing table is set as the printing mask. Larger than the radius of curvature (R2) of the region corresponding to the squeegee non-sliding portion adjacent to the printing end portion where the sliding of the squeegee is finished,
(b) When the sliding direction (printing direction) of the squeegee is opposite to the conveyance direction of the substrate, the radius of curvature (R1) of the region corresponding to the squeegee sliding portion of the printing table is set as the printing mask. The distance between the print areas (areas printed in one shot) is made larger than the radius of curvature (R2) of the area corresponding to the squeegee non-sliding part adjacent to the printing start part where sliding of the squeegee starts. Without increasing (the gap between print areas), it is possible to prevent a contact between the print mask and the substrate by promptly securing a sufficient space between the print mask and the substrate after the printing is completed. .
Further, the radius of curvature (R1) of the area corresponding to the squeegee sliding portion of the printing stand is set to the printing end portion where the squeegee sliding ends and the squeegee non-sliding adjacent to the printing start portion where the squeegee sliding starts. By making it larger than the radius of curvature (R2) of the area corresponding to the moving part, it is possible to promptly secure a sufficient space between the printing mask and the printing material immediately after the printing is completed, regardless of the conveyance direction of the printing material. It is possible to prevent the print mask and the substrate from coming into contact with each other.

In the present invention, the printing mask moves in a predetermined direction along the main surface, the printing stand does not move in the direction along the main surface of the printing mask, and only performs a rotation (rotation) operation; and A configuration is also included in which the squeegee does not move and the squeegee slides relatively on the print mask by the relative movement caused by the movement of the print mask.
For example, in a screen printing apparatus in which a printing mask is moved, a screen configured to perform screen printing by moving the printing mask from right to left when the rotation direction of the printing table is counterclockwise. The present invention can also be applied to a printing apparatus.

  Further, as in the screen printing apparatus of the present invention (Claim 2), the printing end portion of the printing stand where the sliding of the squeegee on the printing mask ends and / or the printing start where the sliding of the squeegee starts. Even when the notch is provided in the area corresponding to the squeegee non-sliding part adjacent to the printing part, the gap between the printing areas is not increased, and the printing mask and the substrate can be printed immediately after printing is completed. It is possible to prevent a contact between the printing mask and the printing material by securing a sufficient interval. Therefore, it is possible to prevent the printed pattern from being damaged after printing due to the contact between the printing mask and the substrate, and to effectively use the substrate while maintaining high printing accuracy.

In the present invention, the printed material is a long sheet-shaped printed material, and after the printing process to one area is completed, the printed material is conveyed in a predetermined direction and then printed in the next area. In case
(a) When the sliding direction (printing direction) of the squeegee is the same as the conveyance direction of the substrate, the squeegee adjacent to the printing end portion of the printing stand where the sliding of the squeegee on the printing mask ends. A notch is provided in the region corresponding to the non-sliding part,
(b) When the sliding direction (printing direction) of the squeegee is opposite to the conveyance direction of the printing material, the squeegee adjacent to the printing start portion of the printing stand where the sliding of the squeegee on the printing mask starts. By providing a notch in the area corresponding to the non-sliding part, the print area (the area printed in one shot) can be quickly printed after printing without increasing the interval (gap between print areas). In addition, a sufficient space can be secured between the printing mask and the substrate to prevent the printing mask and the substrate from contacting each other.
In addition, a notch is provided in a region corresponding to the squeegee non-sliding portion adjacent to the printing end portion where the sliding of the squeegee ends on the printing mask and the printing start portion where the sliding of the squeegee starts. Therefore, it is possible to prevent a contact between the printing mask and the printing material by promptly securing a sufficient space between the printing mask and the printing material after the printing is finished without questioning the conveyance direction of the printing material. .

  Further, as in the screen printing apparatus according to the present invention (Claim 3), the printing end portion where the sliding of the squeegee on the printing mask ends and / or the printing start portion where the sliding of the squeegee starts. When the portion corresponding to is an end portion, it is possible to ensure a sufficient interval between the print mask and the substrate immediately after the end of printing. Therefore, it is possible to prevent the printed pattern from being damaged after printing due to the contact between the printing mask and the substrate, and to effectively use the substrate while maintaining high printing accuracy.

In the present invention, the printed material is a long sheet-shaped printed material, and after the printing process to one area is completed, the printed material is conveyed in a predetermined direction and then printed in the next area. In case
(a) When the sliding direction (printing direction) of the squeegee is the same as the transport direction of the substrate, the portion of the printing stand corresponding to the printing end portion where the sliding of the squeegee on the printing mask ends Is configured to be the end,
(b) When the sliding direction (printing direction) of the squeegee is opposite to the conveyance direction of the substrate, the portion of the printing stand corresponding to the printing start portion where the sliding of the squeegee on the printing mask starts Is configured so that the print mask and the substrate can be printed immediately after printing is completed without increasing the interval (gap between print areas) between print areas (areas printed in one shot). A sufficient interval can be secured between the print mask and the substrate to be printed.
In addition, by configuring the printing stand so that both the printing end portion where the sliding of the squeegee ends on the printing mask and the portion corresponding to the printing start portion where the sliding of the squeegee starts are ends. It is possible to prevent a contact between the printing mask and the printing material by promptly securing a sufficient space between the printing mask and the printing material after completion of printing without questioning the conveyance direction of the printing material.

  The screen printing method of the present invention (Claim 4) is a screen printing method using the screen printing apparatus according to any one of Claims 1 to 3, wherein a substrate is placed on a printing stand, After disposing the print mask on the printed material, supply the print paste on the print mask, slide the print mask on the print mask with the squeegee in contact with the print mask, and rotate the printing stand. The area to be printed on the substrate placed on the surface facing the print mask of the printing stand is pressed toward the position where the squeegee of the print mask slides, and the print paste is removed from the print mask. Since printing is performed by extruding toward the printed material, a sufficient space is ensured between the print mask and the substrate immediately after printing, without increasing the gap between print areas, Printing mask and the printed matter becomes possible to prevent the contact. Therefore, it is possible to prevent the printed pattern from being damaged after printing due to the contact between the printing mask and the substrate, and to effectively use the substrate while maintaining high printing accuracy.

It is a figure which shows the screen printing apparatus concerning one Example (Example 1) of this invention. It is a figure which shows the structure of the printing stand which comprises the screen printing apparatus concerning Example 1 of this invention. (a), (b) is a figure which shows the method of performing screen printing using the screen printing apparatus concerning Example 1 of this invention. (a), (b) is a figure which shows the method of performing screen printing using the screen printing apparatus concerning Example 1 of this invention. (a) is a figure which shows the principal part structure of the screen printing apparatus concerning other Example (Example 2) of this invention, (b) is a figure which shows the modification. It is a figure which shows the principal part structure of the screen printing apparatus concerning further another Example (Example 3) of this invention. (a), (b), (c) is a figure which shows an example of the conventional screen printing method. It is a figure for demonstrating the problem of the conventional screen printing method. It is a figure for demonstrating the problem of the conventional screen printing method.

DESCRIPTION OF SYMBOLS 1 Printing mask 1a Opening of printing mask 2 Printing stand 2a Opposite surface (upper surface) with printing mask of printing stand
3 Substrate 4 Squeegee 5 Print paste 5a Print pattern 6 Ink return (scraper)
10 Undried part 11 Squeegee sliding part (squeegee sliding area)
12 Squeegee non-sliding portion 13 Notch C Gap G Print area gap P Printing end portion R1 Curvature radius R2 of region S1 Curvature radius S1 of region S2 Corresponding to squeegee sliding portion S2 Corresponding to squeegee non-sliding portion Area W Transport direction of substrate X Sliding direction of squeegee (printing direction)
Y Moving direction of ink return (scraper) Z Turning direction of printing stand

  The features of the present invention will be described in more detail below with reference to examples of the present invention.

  FIG. 1 is a diagram showing a screen printing apparatus according to an embodiment of the present invention. In this screen printing apparatus, the print mask 1 and the opposed surface (upper surface) 2a of the print mask 1 have a convex curved surface shape so that a predetermined region can be directly opposed to the print mask 1. A squeegee that slides on the printing mask 1 while pressing the printing table 2 and the printing mask 1, which are configured to be rotatable, on the substrate 3 placed on the upper surface (opposing surface) 2 a of the printing table 2. 4 is provided.

  In this screen printing apparatus, when the squeegee 4 slides on the printing mask 1, the printing stand 2 rotates and the long substrate 3 placed on the upper surface 2 a of the printing stand 2 is The area to be printed abuts the area corresponding to the position where the squeegee 4 of the print mask 1 slides, and the printing paste 5 is pushed out from the print mask 1 toward the substrate 3 by the pressing force of the squeegee 4. Thus, printing on the printing material 3 is performed.

Further, as described above, the upper surface 2a of the printing table 2 constituting the screen printing apparatus has a convex curved surface shape, but the curvature radius of the upper surface 2a is not constant in all regions. As shown, the radius of curvature R 1 of the region S 1 corresponding to the squeegee sliding portion (squeegee sliding area) 11 on which the squeegee 4 slides on the printing mask 1 is the squeegee 4 on the printing mask 1 of the printing stand 2. Is configured to be larger than the radius of curvature R2 of the region S2 corresponding to the squeegee non-sliding portion 12 following the printing end portion P where the sliding ends.

That is, the squeegee sliding portion (squeegee sliding area) is provided so that a sufficient interval can be secured between the printing mask 1 and the substrate 3 promptly after the end of printing without increasing the gap between the printing areas. ) The radius of curvature R1 of the region S1 corresponding to 11 is made larger than the radius of curvature R2 of the region S2 corresponding to the squeegee non-sliding portion 12.

Next, a method for performing screen printing using this screen printing apparatus will be described with reference to FIGS.
(1) As shown in FIG. 3A, a long printed material (in this embodiment, a ceramic green sheet) 3 is fixed on a printing table 2 by a method such as suction, and a printing paste 5 is applied to a printing mask 1. Then, the ink paste (scraper) 6 is moved in the direction of arrow Y to develop the printing paste 5 on the printing mask 1. FIG. 3A shows a state in which a printing paste (printing pattern) 5 (5a) previously printed forward is formed in the traveling direction of the substrate (ceramic green sheet) 3.

  (2) Then, as shown in FIG. 3 (b), the printing table 2 is raised, the squeegee sliding start end is brought into light contact with the printing mask 1, and then the squeegee 4 is pressed against the upper surface of the printing mask 1. By moving in the direction of the arrow X in the horizontal direction, the printing paste 5 on the printing mask 1 is filled into the opening 1a (FIG. 2) of the printing mask 1.

  At this time, the squeegee 4 is moved in the direction of the arrow X as shown in FIG. 3B, and the tangent line between the printing mask 1 and the substrate (ceramic green sheet) 3 as shown in FIG. 4A. The printing stand 2 is rotated counterclockwise (in the direction of arrow Z) so that the position coincides with the tip position of the moving squeegee 4 or is at least in the vicinity and substantially coincides. The printing paste 5 is printed (applied) on the substrate (ceramic green sheet) 3 to be printed.

  (3) After the printing is finished, as shown in FIG. 4B, the printing stand 2 is lowered to release the adsorption of the substrate (ceramic green sheet) 3, and the long substrate 3 is indicated by the arrow W. Then, a predetermined amount is conveyed and screen printing is performed on the next printing area.

  Here, in order to prevent the undried portion 10 after printing from coming into contact with the lower surface of the printing mask 1 when a long amount of the printing material 3 is conveyed by a predetermined amount, between the printing mask 1 and the printing material 3. The long printed material 3 is conveyed so that a predetermined gap C is ensured.

Here, the necessary amount of the gap G between the print areas necessary for preventing the undried portion 10 after printing from contacting the print mask 1 corresponds to the squeegee sliding portion (squeegee sliding area) 11 described above. and the radius of curvature R 1 of the regions S1 to vary more to the radius of curvature R2 of the area S2 corresponding to the squeegee non sliding portion 12.

In the first embodiment, screen printing is performed under different conditions, and the radii R1 and R2 of the region S2 corresponding to the squeegee sliding part 11 and the region S2 corresponding to the squeegee non-sliding part 12 and after printing is finished. The relationship with the necessary amount of the gap G between the printing areas necessary for preventing the undried portion 10 from contacting the printing mask 1 was examined.
The results are shown in Table 1.

As shown in Table 1, when the radius of curvature (R1) of the printed portion is 200 mm, 1500 mm, or 3000 mm, the region corresponding to the squeegee non-sliding portion 12 as in the prior art shown in FIG. Compared to the case where the radius of curvature (R2) in the vicinity of the squeegee sliding end point) is the same value as the radius of curvature (R1) of the region (printed portion) S1 corresponding to the squeegee sliding end portion 11, the vicinity of the squeegee sliding end point In the screen printing apparatus of the present invention in which the radius of curvature (R2) of the print is smaller than the radius of curvature (R1) of the printed portion, the gap G between the print areas is small. A sufficient space between the printing mask 1 and the printing pattern 5a (printed material 3) can be prevented, and the utilization efficiency of the printed material 3 can be improved.

Further, as shown in Table 1, when the radius of curvature (R1) of the printed portion is three times or more of the radius of curvature (R2) near the squeegee sliding end point, the gap G between the printing areas is 60% of the conventional technology. In order to make the following possible, it is desirable that the radius of curvature (R1) of the printed portion is at least three times the radius of curvature (R2) near the squeegee sliding end point.

In the present invention, the object is to reduce the gap G between print areas by making the radius of curvature (R2) near the squeegee sliding end point smaller than the radius of curvature (R1) of the printed portion (R1> R2). Therefore, there is no particular restriction on the value of the radius of curvature , but when R2 is only slightly smaller than R1, the effect of reducing the gap G between the printing areas is insufficient compared to the above-described conventional technique. In addition, if R2 is made too small relative to R1, the conveyance of the printed material tends to be complicated. Therefore, the relationship between R1 and R2 depends on the specific size and type of the printed material, and the specifics of the printing mask. It is desirable to set in consideration of various conditions such as the general configuration and the shape and size of the print pattern to be printed.

  FIG. 5A is a diagram illustrating the main part of a screen printing apparatus according to another embodiment (second embodiment) of the present invention. As shown in FIG. 5A, in the screen printing apparatus of the second embodiment, the squeegee slide on which the squeegee 4 slides on the print mask 1 on the surface (upper surface) 2a of the printing table 2 facing the print mask 1 is shown. A region S1 corresponding to the moving portion (squeegee sliding area) 11 has an arc-shaped cross section, but the printing end portion of the printing table 2 where the sliding of the squeegee 4 on the printing mask 1 ends. In a region S2 corresponding to the squeegee non-sliding portion 12 subsequent to P (near the squeegee sliding end point portion) S2, a notch 13 is formed such that the upper surface 2a of the printing table is scraped off.

Using the screen printing apparatus having the printing table 2 having the notch 13 formed on the upper surface 2a in this way, the curvature radius R1 of the region S1 corresponding to the squeegee sliding area 11 of the printing table 2 is set to 1500 mm, and the notch is formed. When printing was performed with the depth of the portion 13 being about 5 mm, the necessary amount of the gap G between the print areas necessary for preventing the undried portion 10 of the printed pattern after printing from coming into contact with the print mask 1, It was possible to reduce from 17.4 mm in the prior art to 5 mm.
The depth of the notch may be 3 mm or more.

  As shown in FIG. 5B, the area corresponding to the squeegee non-sliding portion 12 following the printing end portion P where the sliding of the squeegee 4 on the printing mask 1 of the printing table 2 is completed (squeegee sliding). In the vicinity of the end point portion (S2), it is also possible to provide a notch (concave portion) 13 in which a part of the upper surface 2a of the printing table 2 is scraped. Can be obtained.

  FIG. 6 is a diagram illustrating a main part of a screen printing apparatus according to another embodiment (third embodiment) of the present invention. As shown in FIG. 6, in the screen printing apparatus according to the third embodiment, the squeegee sliding portion where the squeegee 4 slides on the printing mask 1 on the surface (upper surface) 2 a of the printing table 2 facing the printing mask 1. The area S1 corresponding to the (squeegee sliding area) 11 has an arc-shaped cross section, and the end of the area S1 corresponding to the squeegee sliding part (squeegee sliding area) 11, that is, the squeegee sliding. The end point P is configured to be an end (termination) of the printing table 2.

As described above, the squeegee sliding of the printing table 2 is performed by using the screen printing apparatus including the printing table 2 configured such that the terminal portion of the region S1 corresponding to the squeegee sliding unit 11 is the terminal portion of the printing table 2. When printing was performed with the curvature radius R1 of the region S1 corresponding to the area 11 set to 1500 mm, the gap G between the print areas necessary for preventing the undried portion 10 of the printed pattern after printing from contacting the print mask. The required amount could be reduced from 17.4 mm in the prior art to 5 mm.

In each of the above embodiments, the case where the sliding direction (printing direction) X of the squeegee 4 is the same as the conveyance direction W of the substrate 3 has been described as an example. In the case where the substrate 3 is conveyed in the direction opposite to the conveyance direction W in the above embodiment,
(a) The curvature radius (R1) of the region corresponding to the squeegee sliding portion 11 of the printing stand 2 is set to the squeegee non-sliding portion adjacent to the printing start portion where the sliding of the squeegee 4 on the printing mask 1 starts. Larger than the radius of curvature (R2) of the corresponding region,
(b) A notch is provided in a region corresponding to the squeegee non-sliding portion adjacent to the printing start portion where the sliding of the squeegee 4 on the printing mask 1 starts on the printing stand 2;
(c) The printing area (printed in one shot) is started by starting the sliding of the squeegee on the printing mask 1 at the end of the printing table 2 opposite to that in the case of the third embodiment. The printing mask and the substrate to be in contact with each other immediately after printing is completed, without increasing the interval between the printing area and the printing area. Can be prevented.

  The invention of the present application is not limited to the above-described embodiments. The type of substrate, the specific configuration of the printing stand, the type of printing mask, the opening pattern provided in the printing mask, the operation mode of the squeegee, printing Various types of application and modifications can be made within the scope of the invention with respect to the type of paste.

As described above, according to the present invention, without increasing the gap between the print areas, after the printing is completed, a sufficient space is quickly secured between the print mask and the substrate, and the print mask and the substrate are It is possible to prevent contact, and it is possible to prevent the printed pattern from being damaged after printing, and to effectively use the printing material while maintaining high printing accuracy.
Therefore, the present invention can be widely used in the process of manufacturing a multilayer ceramic electronic component, in which internal electrodes are printed on ceramic green sheets to be stacked.

Claims (4)

The surface to be printed is placed and the surface facing the printing mask has a convex curved surface shape, and is configured to be rotatable so that a predetermined area can be directly opposed to the printing mask. A printing stand;
A printing mask disposed on the printing table;
A squeegee that slides on the print mask while pressing the print mask against the substrate placed on the printing stand;
When the squeegee slides on the printing mask, the printing stand rotates, and an area to be printed on the substrate placed on the surface of the printing stand facing the printing mask is to be printed. The printing mask is brought into contact with a region corresponding to the position where the squeegee slides, and printing is performed by pressing the printing paste from the printing mask toward the substrate by the pressing force of the squeegee. In the screen printing apparatus configured in
The radius of curvature (R1) of the area corresponding to the squeegee sliding portion where the squeegee slides on the printing mask of the printing stand is the end of sliding of the squeegee on the printing mask of the printing stand. A screen printing apparatus having a radius of curvature (R2) larger than a region corresponding to a squeegee non-sliding portion adjacent to a printing ending portion and / or a printing start portion where sliding of the squeegee starts. The surface to be printed is placed and the surface facing the printing mask has a convex curved surface shape, and is configured to be rotatable so that a predetermined area can be directly opposed to the printing mask. A printing stand;
A printing mask disposed on the printing table;
A squeegee that slides on the print mask while pressing the print mask against the substrate placed on the printing stand;
When the squeegee slides on the printing mask, the printing stand rotates, and an area to be printed on the substrate placed on the surface of the printing stand facing the printing mask is to be printed. The printing mask is brought into contact with a region corresponding to the position where the squeegee slides, and printing is performed by pressing the printing paste from the printing mask toward the substrate by the pressing force of the squeegee. In the screen printing apparatus configured in
In a region corresponding to a squeegee non-sliding portion adjacent to a printing end portion at which the sliding of the squeegee on the printing mask ends and / or a printing start portion at which the sliding of the squeegee starts. A screen printing apparatus having a notch. The surface to be printed is placed and the surface facing the printing mask has a convex curved surface shape, and is configured to be rotatable so that a predetermined area can be directly opposed to the printing mask. A printing stand;
A printing mask disposed on the printing table;
A squeegee that slides on the print mask while pressing the print mask against the substrate placed on the printing stand;
When the squeegee slides on the printing mask, the printing stand rotates, and an area to be printed on the substrate placed on the surface of the printing stand facing the printing mask is to be printed. The printing mask is brought into contact with a region corresponding to the position where the squeegee slides, and printing is performed by pressing the printing paste from the printing mask toward the substrate by the pressing force of the squeegee. In the screen printing apparatus configured in
A portion of the printing stand corresponding to a printing end portion where the sliding of the squeegee ends on the printing mask and / or a printing start portion where the sliding of the squeegee starts is an end portion. A screen printing apparatus. A screen printing method using the screen printing apparatus according to claim 1,
Placing the substrate on the printing table;
Disposing the printing mask on the substrate to be printed placed on the printing table;
Supplying a printing paste on the printing mask;
While the squeegee is in contact with the printing mask, it is slid on the printing mask, and the printing stand is rotated so that the substrate placed on the surface of the printing stand facing the printing mask is placed. An area of the printed material to be printed is brought into contact with an area corresponding to a position where the squeegee slides on the printing mask, and the printing paste is removed from the printing mask by the pressing force of the squeegee. A screen printing method comprising: performing printing by extruding toward the surface.

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