JP6741449B2 - Printer - Google Patents

Description

The present invention relates to a printing machine for printing on an object to be printed having a curved surface.

Conventionally, a mesh-shaped mask is installed above the material to be printed in a state of being separated from the material to be printed, and then the paste pressure head is moved in the direction opposite to the blade while pressing the mask against the material to be printed by the blade of the paste pressure head. Sliding the blade over the mask, and during the sliding, pressing out the paste between the two blades of the paste pressing head to press the paste onto the substrate through the opening formed in the mask. To transfer the paste to the printing target. At this time, the distance between the two blades is set to be smaller than the dimension in the advancing direction of the paste extruding head in the non-opening portion of the mask, so that a flat printing surface can be formed on a substrate having a depression. (For example, see Patent Document 1).

JP, 2014-200935, A

In the screen printing apparatus, the distance between the two blades is smaller than the dimension of the non-opening portion of the mask in the moving direction of the paste press-out head. Since it can be filled, a flat printing surface can be formed on the printing object.

However, when the printed material is curved, it is not possible to form a flat printing surface on the curved printed material.
The reason is that when the printing object is curved in a convex shape, when the blade is pressed against the mask, the mask (screen) is largely deformed and distorted, and a good printing surface cannot be formed on the printing object. There is. There is also a problem that the mask may be damaged.

The present invention has been made in view of these problems, and provides a printing machine capable of forming a good printing surface without fear of damaging the screen even when the printing object is curved. With the goal.

The present invention has been made to solve at least a part of the problems described above, and can be realized as the following application examples. In addition, the reference numerals in parentheses and supplementary explanations in this column show the correspondence with the embodiments described later in order to help understanding of the present invention, and do not limit the present invention in any way. ..

[Application example 1]
A printing machine (1) according to the present invention includes a mounting portion (10) having a flat surface on which a printed body (5) having a curved surface on one side of a section when cut in a printing direction is mounted. A screen plate (20) for transferring the functional material applied to the opposite side of the placing part (10) to the printing medium (5) to form an image on the printing medium (5), A plate supporting part (30) for supporting the screen plate (20) on the upper side of the placing part (10), and a pressing part for pressing the functional material applied on the front surface side of the screen plate (20). (40) and the pressing part (40) are moved in the vertical direction relative to the placing part (10) and pressed against the screen plate (20) with a predetermined pressing force, The pressure adjusting section (50) for pressing the screen plate (20) against the curved surface of the printing medium (5 ) and the pressing section (40) are operated by the pressure adjusting section (50) at the predetermined pressure. With the screen plate (20) pressed against the surface of the printing target (5), the placing part (10) and the printing target (5) are pressed against the pressing part (40). by relatively moving the printing direction that, said functional material is transferred in the screen plate (20), wherein a moving unit for forming an image on a printing substrate (5) (60), equipped with Is the gist.

Such a printing machine (1) can form a good printing surface even on the printing object (5) whose one surface of the cross section is a curved surface when cut in the printing direction. .. In addition, the printing medium (5) and the screen plate (20) are not damaged during printing.

That is, the pressing portion (40) is pressed against the printing plate (5) against the printing plate (5) while the pressing portion (40) is moved in the printing direction relative to the screen printing plate (20). A functional material is applied to the printed body (5).

At that time, even if the printing medium (5) is curved, the relative position of the plate supporting part (30) and the pressing part (40) and the placing part (10) is adjusted by the pressure adjusting part (50). By changing the, the pressing portion (40) can be pressed against the curved surface of the printing medium (5) with a predetermined pressing force via the screen plate (20).

Therefore, even if the printed material (5) is curved, the functional material is transferred from the screen plate (20) to the printed material (5) with a predetermined pressing force, so that a good printing surface is formed. You can do it.

Further, if a pressing force equal to or lower than a load that the screen plate (20) and the printing object (5) can withstand is applied as the predetermined pressure, the printing object (5) and the screen printing plate (20) are damaged. Nothing.

[Application example 2]
In the printing machine (1) according to Application Example 1, the screen plate (20) transfers the functional material onto an intermediate transfer body (7) instead of the printing target body (5), and the pressing portion ( 40) transfers the functional material applied to the screen plate (20) to the intermediate transfer body (7) to form an image on the intermediate transfer body (7), and the pressure adjusting section (50). is pre SL in place of the pressing portion (40), by changing the relative position of said intermediate transfer member (7) and the mounting section (10), said intermediate transfer member (7), a predetermined pressing force in, pressing the on the surface of the printing material (5), said moving portion (60), before Symbol intermediate transfer member (7), by a predetermined pressing force, pressing the on the surface of the printing material (5) In the applied state, the placing part (10) and the printing medium (5) are moved relative to the intermediate transfer body in the printing direction , whereby the intermediate transfer body (7) is moved. to transfer the functional material, wherein the subject matter to form an image on a printing substrate (5).

In such a printing machine (1), an image is first formed on the intermediate transfer body (7) instead of the printing medium (5). Here, the material of the intermediate transfer body (7) is selected from the viewpoint of ease of image formation due to the flexibility and the functional material, for example, a material in which an image is easily formed by the pressing portion as compared with the material to be printed (5). can do. Therefore, it is possible to form an image better than forming an image directly on the printing medium (5).

Further, by moving the intermediate transfer body (7) in the printing direction relative to the mounting portion (10), the image forming surface of the intermediate transfer body (7) is pressed against the printing medium (5). By applying it, a good image can be easily formed on the printing medium (5).

FIG. 2 is an external view showing a schematic configuration of a printing machine. It is an explanatory view showing a schematic movement of an intermediate transfer body at the time of image formation. It is explanatory drawing which shows the rough motion of the intermediate transfer body and the to-be-printed body at the time of image transfer of the to-be-printed body from the intermediate transfer body. It is explanatory drawing which shows the schematic movement of a screen plate, a plate support part, a squeegee, a pressure regulation part, and a to-be-printed object, when an image is directly formed from a screen plate to a to-be-printed object.

Embodiments to which the present invention is applied will be described below with reference to the drawings. It should be noted that the embodiment of the present invention is not limited to the following embodiment, and various forms can be adopted as long as they are within the technical scope of the present invention.

[First Embodiment]
(Configuration of printing machine 1)
First, a schematic configuration of the printing press 1 will be described with reference to FIG. 1A and 1B are external views showing a schematic configuration of the printing machine 1. FIG. 1A is a front view, FIG. 1B is a plan view, FIG. 1C is a left side view, and FIG. ) Is a right side view. In addition, in FIG. 1, a part of the drawing is simplified for easy understanding of the description.

The printing machine 1 includes an intermediate transfer body 7, a placement unit 10, a screen plate 20, a plate support unit 30, a pressing unit 40, a pressure adjusting unit 50, a moving unit 60, a base unit 80, and a control unit 90 as main components. I have it.

The intermediate transfer body 7 temporarily forms an image such as a circuit pattern of a circuit board from a screen printing plate 20 described later with a functional material, and transfers the formed image to the printing body 5 to form an image on the printing body 5. Is formed.

The intermediate transfer body 7 is, for example, a polydimethylsiloxane (PDMS) in the shape of a cylinder or a cylinder, or a metal material such as aluminum or a resin material such as Duracon formed in the shape of a cylinder or a cylinder on the surface of which the PDMS layer is formed. Is formed.

The mounting portion 10 is a portion on which the printing target 5 having a curved cross section when cut in the printing direction is mounted, and is a flat plate made of metal such as SUS material.
Here, the printing object 5 is, for example, a material for forming a circuit board such as a ceramic green sheet, a resin such as plastic, or paper. Further, the printing medium 5 is curved in a convex shape with respect to the mounting portion 10 with a constant curvature.

The screen plate 20 is a sheet-like member that transfers the functional material applied to the opposite side of the mounting portion 10 (and the intermediate transfer body 7) to the intermediate transfer body 7 and forms an image on the surface of the intermediate transfer body 7. It is a membrane and uses a gauze (screen) woven from fibers such as polyester.

The screen plate 20 can be formed by fixing the screen to the plate support portion 30, forming a plate film (resist) on the screen support portion 30, and closing eyes other than necessary image lines.
The plate supporting portion 30 is a portion that supports the screen plate 20 on the upper side of the mounting portion 10 (further above the intermediate transfer body 7), and is a metal frame member such as SUS material.

In addition, the plate supporting unit 30 is provided with a pressing unit 40 (squeegee 40), presses the functional material on the screen plate 20 against the surface of the screen plate 20, and presses the functional material on the screen plate 20 into a plate film. An image such as a circuit pattern is formed on the intermediate transfer body 7 by extruding the intermediate transfer body 7 from other portions.

Further, the plate support portion 30 is attached to the slide mechanism 32, and the slide mechanism 32 slides in the printing direction (direction orthogonal to the rotation axis direction of the intermediate transfer body 7).
The slide mechanism 32 includes a motor and a rack mechanism (not shown). The output shaft of the motor is rotated by a command signal from the control unit 90, and the rack mechanism is operated by a pinion gear (not shown) provided on the output shaft. , The plate support portion 30 is moved in the printing direction (left and right direction in FIG. 1).

The pressing portion 40 is a portion that presses the functional material applied to the front surface side of the screen plate 20, and is a cylindrical member having a rotation axis substantially perpendicular to the printing direction. The pressing portion 40 is formed by forming a metal material such as aluminum into a cylindrical shape, forming a resin layer on the surface thereof, and pressing the functional material applied to the front surface of the screen plate 20 to form an intermediate layer. An image is formed on the transfer body 7.

The pressure adjusting unit 50 presses the pressing unit 40 against the surface of the intermediate transfer body 7 with a predetermined pressing force via the screen plate 20 by changing the relative position between the intermediate transfer body 7 and the mounting unit 10. It is the part that hits.

The pressure regulator 50 includes a motor and a ball screw (not shown). The motor is attached to the base 80, and the output shaft of the motor is the screw portion of the ball screw. The ball portion of the ball screw is attached to the arm (not shown) of the intermediate transfer member.

Then, the rotation of the motor is controlled by a command signal from the control unit 90, and the intermediate transfer member 7 is moved by the ball screw constituted by the screw portion of the output shaft of the motor and the ball portion attached to the arm of the intermediate transfer member 7. It is moved up and down and the pressing portion 40 is pressed against the surface of the intermediate transfer member 7 with a predetermined pressing force.

The moving unit 60 is a unit that moves the intermediate transfer body 7 relative to the mounting unit 10 in the printing direction. In the first embodiment, the mounting unit 10 is moved in the printing direction.

The moving unit 60 includes a motor and a ball screw (not shown), the motor is attached to the base 80, and the output shaft of the motor is a screw portion of the ball screw. Further, the ball portion of the ball screw is attached to the mounting portion 10.

Then, the rotation of the motor is controlled by a command signal from the control unit 90, and the placement unit 10 is printed in the printing direction by the ball screw configured by the screw portion of the output shaft of the motor and the ball portion attached to the placement unit 10. The intermediate transfer member 7 is moved relative to the mounting portion 10 by moving it (in the left-right direction in FIG. 1).

The moving section 60 is a section for transferring the image formed on the intermediate transfer body 7 to the printing medium 5, and the image formed on the intermediate transfer body 7 from the screen plate 20 is placed on the placing section 10. The image is transferred to the printing medium 5 from the intermediate transfer medium 7 by pressing it against the printing medium 5.

At this time, in response to a command signal from the control unit 90, the pressure adjusting unit 50 is operated, and the moving unit 60 is operated while the image forming surface of the intermediate transfer member 7 is moved up and down along the curved surface of the printing target 5. The image formed on the intermediate transfer body 7 is transferred to the printing medium 5 by sliding the mounting portion 10 by sliding.

By doing so, it is possible to favorably transfer the image from the intermediate transfer body 7 to the printing medium 5 even if the printing medium 5 is curved.
The control unit 90 includes a CPU, a ROM, a RAM, an I/O, and an external mechanical device (not shown). In particular, the control unit 90 stores the cross-sectional shape of the material 5 to be printed, moves the intermediate transfer body 7 in the vertical direction, and presses it. The portion 40 is pressed against the intermediate transfer member 7 with a predetermined pressure, or the moving portion 60 is moved.

(Operation of printing machine 1)
Next, the control and operation of the printing press 1 will be described with reference to FIGS.
2A and 2B are explanatory views showing a schematic movement of the intermediate transfer body 7 during image formation, and FIGS. 2A and 2B are diagrams showing an image transfer from the screen plate 20 to the intermediate transfer body 7. FIG. 2C is an explanatory diagram showing the schematic movement of the intermediate transfer member 7, and FIGS. 2C to 2E show that the intermediate transfer member 7 has a downward curve (concave curve). It is explanatory drawing which shows the rough movement of the intermediate transfer body 7 at the time of image transfer to the to-be-printed body 5, and FIG.2(f)-(h) shows the to-be-printed body 5 curving upward (convex curve). FIG. 7 is an explanatory diagram showing a schematic movement of the intermediate transfer body 7 when an image is transferred from the intermediate transfer body 7 to the printing medium 5 in the case of performing.

FIG. 3 is an explanatory view showing the schematic movements of the intermediate transfer body 7 and the printing medium 5 when the image is transferred from the intermediate transfer medium 7 to the printing medium 5, and FIGS. FIGS. 3D to 3F are schematic diagrams showing the general movements of the intermediate transfer body 7 and the print medium 5 when the print medium 5 has a downward curve (concave curve). It is explanatory drawing which shows the schematic movement of the intermediate transfer body 7 and the to-be-printed body 5 in case the to-be-printed body 5 has an upward curve (convex curve).

(1) The operator or the like of the printing machine 1 inputs the cross-sectional shape (curved shape) of the printing medium 5 in the direction perpendicular to the printing direction to the control unit 90. At this time, the curvature of the curved shape and the bending start position in the printing direction of the printing medium 5 may be input. Alternatively, the cross-sectional shape may be input by inputting the printing direction of the curved shape and its height (height from a reference point such as the upper surface of the mounting portion 10).

(2) The control unit 90 generates the data of the cross-sectional shape of the printing medium 5 input in (1).
(3) The operator or the like attaches the screen plate 20 masked with a desired printing pattern (such as the circuit pattern of the circuit board) to the plate support 30 of the printing machine 1 (see FIG. 2).

(4) The operator or the like places the printing target 5 on the placing section 10 (see FIG. 2 ).
(5) The controller 90 is operated to form an image on the intermediate transfer member 7 (see FIGS. 2A and 2B).

(A) The control unit 90 controls the motor so that the pressure adjusting unit 50 moves up and down so that the pressing unit 40 of the intermediate transfer member 7 is brought into close contact with a predetermined pressing force (FIGS. 2A and 2B). reference).
(A) The motor is controlled to move the slide mechanism 32 from one end to the other end (see FIGS. 2A and 2B).
(6) The control unit 90 controls the motor to separate the intermediate transfer body 7 from the screen plate 20.

(7) In the control unit 90, the motor is controlled based on the data generated in (2), the intermediate transfer body 7 is moved up and down based on the data generated in (2), and the printing target placed on the mounting unit 10 is printed. The image forming surface of the intermediate transfer body 7 is pressed against the surface of the body 5 with a predetermined pressing force. As a result, the image is transferred from the intermediate transfer body 7 to the printing medium 5 (see FIGS. 2E, 2H, and 3A to 3F).

(Characteristics of printing machine 1)
In the printing machine 1 as described above, a good printing surface can be formed even on the printing medium (5) having a curved cross section when cut in the printing direction.

That is, in the printing machine 1, first, an image is formed on the intermediate transfer body 7, but the intermediate transfer body 7 is made of a material that is easier to form an image by the pressing portion than the material to be printed 5, such as flexibility and functionality. The material can be selected from the viewpoint of ease of image formation depending on the material. Therefore, it is possible to form an image better than when the image is directly formed on the printing medium 5.

In addition, since the intermediate transfer body 7 is cylindrical or cylindrical and its rotation axis is perpendicular to the printing direction, the image forming surface of the intermediate transfer body 7 is set along the curved surface of the printing target 5 by a predetermined amount. It is possible to move (up and down) while maintaining the pressing force of. Therefore, even when the printing medium 5 is curved, it is possible to form (print) an image in a good state.

[Second Embodiment]
In the first embodiment, the intermediate transfer body 7 is used to perform so-called screen printing on the intermediate transfer body 7 to form an image on the intermediate transfer body 7. Thereafter, so-called offset printing is performed from the intermediate transfer body 7 to the printing medium. A second embodiment in which an image is transferred to the print medium 5 but screen printing is directly performed on the printing medium 5 without using the intermediate transfer body 7 will be described with reference to FIG.

FIG. 4 shows schematic movements of the screen plate 20, the plate support portion 30, the pressing portion 40 (squeegee 40), the pressure adjusting portion 50, and the material to be printed 5 when the image is transferred from the screen plate 20 to the material to be printed 5. FIG. 4A to FIG. 4C are explanatory diagrams showing that, when the printing object 5 has a downward curve (concave curve), FIGS. 4D to 4F show the printing object. 5 is an explanatory diagram showing a schematic movement when 5 has an upward curve (convex curve). FIG.

The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. In the first embodiment, the pressure adjusting section 50 adjusts the relative positions of the intermediate transfer body 7 and the placing section 10, but in the second embodiment, instead of the intermediate transfer body 7, the plate support section is used. By changing the relative positions of the mounting portion 10 and the squeegee 40 and the squeegee 40, the squeegee 40 is directly pressed against the curved surface of the printing medium 5 with a predetermined pressing force via the screen plate 20. ing.

In the control unit 90, the plate support unit 30 and the squeegee 40 in the pressure adjusting unit 50 are based on the curved shape data of the printing target 5 input in (1) of “Operation of the printing machine 1” in the first embodiment. And the relative position of the mounting part 10 in the vertical direction is controlled.
The control unit 90 also controls the relative positions of the plate support unit 30, the squeegee 40, and the mounting unit 10 in the printing direction.

In this way, by controlling the relative positions of the plate supporting unit 30 and the squeegee 40 and the mounting unit 10, the squeegee 40 is directly pressed while being pressed with a predetermined pressing force against the printing target 5 mounted on the mounting unit 10. An image can be formed on the printing medium 5 (see FIGS. 4A to 4F).

Therefore, it is possible to perform good image formation (printing) on the printed material 5 even when the printed material 5 is curved.

[Other Embodiments]
Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various aspects can be adopted.

In the first embodiment described above, the intermediate transfer member 7 was formed into a cylindrical shape, but a flat plate-shaped member was formed so as to be curved in a direction opposite to the curved printing target member 5, and an image was formed on the intermediate transfer member 7. After that, the intermediate transfer body 7 may be turned upside down and brought into close contact with the printing medium 5, so that the image formed on the intermediate transfer medium 7 is transferred to the printing medium 5. By doing so, an image can be formed on the printing medium 5 with a simple structure.

DESCRIPTION OF SYMBOLS 1... Printing machine 5... Printed body 7... Intermediate printing body 10... Placement part 20... Screen plate 30... Plate support part 31... Sliding part 32... Slide mechanism 40... Pressing part (squeegee) 50... Pressure adjusting part 60... Moving part 80... Base part 90... Control part.

Claims (2)

A mounting portion having a flat surface on which one of the surfaces of the cross section when cut in the printing direction is a curved surface is mounted,
A screen plate that transfers the functional material applied to the opposite side of the placing part to the printing medium, to form an image on the printing medium,
A plate support part for supporting the screen plate on the upper side of the placing part,
A pressing portion for pressing the functional material applied to the front surface side of the screen plate,
The pressing portion is moved relative to the placing portion in the up-and-down direction and pressed against the screen plate with a predetermined pressing force to press the screen plate on the curved surface of the printing medium. With the pressure regulator
The pressing portion, in a state in which the screen plate is pressed against the surface of the printing object by the pressure adjusting portion at the predetermined pressure, the placing portion and the printing object, with respect to the pressing portion. , by relatively moving the printing direction, and the screen plate said functional material is transferred, the mobile unit that forms an image on a printing substrate,
A printing machine characterized by having. The printing machine according to claim 1,
The screen plate transfers the functional material to an intermediate transfer member instead of the printing target,
The pressing portion transfers the functional material applied to the screen plate to the intermediate transfer member to form an image on the intermediate transfer member,
The pressure adjusting section, instead of the front Symbol pressing portion, by changing the relative position of the intermediate transfer member and the mounting section, wherein the intermediate transfer member, by a predetermined pressing force, the surface of the medium to be printed pressed against the,
The mobile unit, a pre-Symbol intermediate transfer member, by a predetermined pressing force, wherein in a state pressed against the surface of the printing material, the placing part and the medium to be printed, to the intermediate transfer member, by relatively moving the printing direction, said transferring the functional material of the intermediate transfer member, the printing press, characterized by forming an image on a printing substrate.