JP2004034529A - Screen process printing device and printing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen process printing device which performs precise and rapid screen process printing without fear about the twisting of a long printed matter such as a strip sheet or film and operates both screen plate and a CCD camera simultaneously at the time of alignment with the other advantages such as the simple construction of an alignment mechanism, excellent economy, high rigidity and least influence of generated dust on the printed matter, and a printing method. <P>SOLUTION: This screen process printing device comprises a printing table 26 installed on a fixed plate 25 and an alignment table 36 fixed to the fixed plate 25 through an alignment unit 35, and further, a printing plate frame holder 41 is installed on the alignment table 36 in a vertically movable manner. An alignment camera 61 mounted on the alignment table 36 is operated to read a mark on the matter to be pritned 33 and the deviation of the printing plate frame holder 41 is corrected using the alignment unit 35 in a printing plate frame alignment mode. Thus the alignment of the printing plate frame is achieved. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a screen printing apparatus and a printing method. More specifically, the present invention relates to a screen printing plate comprising a plate frame and a screen held by the plate frame, and a ski reciprocating along the screen. A frame on which a printhead is mounted, and a printing material such as a band-shaped sheet or film wound in a roll shape is sequentially conveyed to a predetermined position of a printing table by a predetermined amount, and a frame holder for the screen plate is provided. The present invention relates to a screen printing apparatus and a printing method capable of aligning images and continuously printing on the printing substrate.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in screen printing using a screen printing apparatus, alignment is performed for each sheet in order to accurately print at a predetermined location on a printing medium. A positioning mechanism that performs this positioning is a method of pressing the end face of the printing material with a positioning pin, or installing a guide pin as a reference on a printing table, inserting a reference hole provided in the printing material into the guide pin, and performing positioning. Things exist.
[0003]
In addition, there is an auto-alignment method that applies an image processing technology using a CCD camera. In this auto-alignment method, for example, the position of a plate is registered in advance by, for example, test printing or the like, and an image is input to a printing table. The displacement of the printed material is enlarged and recognized by a CCD camera, and the displacement is corrected by using an x, y, θ drive mechanism provided on an alignment table provided below the printing table.
[0004]
As shown in FIG. 6, the printing press body 3 of the screen printing apparatus 1 includes a printing table 6 mounted on a base 5 and a printing section 8 disposed above the printing table 6. ing. The printing unit 8 includes a printing screen plate 9 including a plate frame 9a and a screen 9b held by the plate frame 9a, and a squeegee 11 reciprocating along the screen 9b. The printing material 13 such as a sheet or a film is sequentially conveyed to a predetermined position of the printing table 6, and the printing material 13 such as a belt-like sheet or a film is continuously printed by the paste or the printing ink supplied to the screen 9b. ing.
[0005]
When screen printing is performed on a printing material 13 such as a belt-like sheet or film by the conventional screen printing apparatus 1, for example, a roll-shaped printing material 13 is linearly transferred from a feeding unit 15 to a winding unit 17 by a transport device. When the printing table 6 located between the two is operated alone, the middle of the roll-shaped printing material 13 stretched linearly is forcibly moved. Therefore, the feeding unit 15 and the winding unit 17 of the transfer device must be configured to operate together.
[0006]
[Problems to be solved by the invention]
However, the conventional screen printing has a drawback that when printing a long printing material 13 such as the above-mentioned band-shaped sheet or film, the table alignment method becomes a large-scale apparatus, and the printing material 13 is twisted. If the plate frame alignment method is adopted, interference with the front and rear devices does not occur. However, in the normal camera fixed plate frame alignment method, the result of alignment of the plate cannot be visually recognized, and as shown in FIG. The CCD camera 18 must visually recognize the two positions of the printing plate 13 and the screen plate 9 on the printing table 6, and the pair of CCD cameras 18 visually recognize the screen plate 9 and the printing plate 13. Requires a pair of cameras 18 having a pair of upper and lower fields of view (a total of four cameras). When the CCD camera 18 is inserted, the distance between the screen plate 9 and the printing table 6 is increased. The vertical movement mechanism to maintain the focal length of the vertical viewing camera is required, mechanism has a complex and disadvantages adjustment work becomes complicated, were those lacking in economic efficiency becomes cost.
[0007]
The present invention has been made in view of such circumstances, and there is no fear that a long printing material such as a belt-like sheet or film is twisted, and accurate and high-speed screen printing can be performed. The present invention provides a screen printing apparatus and a printing method which can simultaneously operate a CCD camera and a CCD camera at the time of alignment, have a simple alignment mechanism structure, are economical, have high rigidity, and are less affected by dust generation on a printing substrate. It is aimed at.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a screen printing apparatus according to claim 1 of the present invention comprises a printing screen plate comprising a plate frame and a screen held by the plate frame, and a printing screen plate provided along the screen. A frame on which a reciprocating squeegee head is placed, and a printing material such as a band-shaped sheet or film wound in a roll is sequentially conveyed to a predetermined position on a printing table by a predetermined amount, and A screen printing apparatus capable of aligning the plate frame holders and continuously printing on the substrate.
The printing table is mounted on a fixed plate, an alignment table is mounted on the fixed plate via an alignment unit, a plate frame holder is provided on the alignment table so as to be vertically movable, and an alignment camera is provided on the alignment table. And
[0009]
According to a second aspect of the present invention, there is provided a screen printing apparatus comprising: a printing screen plate including a plate frame and a screen held by the plate frame; and a squeegee head reciprocating along the screen. A printing medium such as a band-shaped sheet or film wound in a roll, is sequentially conveyed to a predetermined position on a printing table by a predetermined amount, and the screen frame holder of the screen plate is aligned. And a screen printing apparatus capable of continuously printing on the substrate.
The printing table is mounted on a fixed plate, an alignment table is mounted on the fixed plate via an alignment unit, a plate frame holder is provided on the alignment table so as to be vertically movable, and an alignment camera is provided on the alignment table. The camera is provided so as to be movable to a printing substrate side on a printing table.
[0010]
According to a third aspect of the present invention, there is provided a screen printing apparatus comprising: a printing screen plate including a plate frame and a screen held by the plate frame; and a squeegee head reciprocating along the screen. A printing medium such as a band-shaped sheet or film wound in a roll, is sequentially conveyed to a predetermined position on a printing table by a predetermined amount, and the screen frame holder of the screen plate is aligned. And a screen printing apparatus capable of continuously printing on the substrate.
The vertical movement mechanism of the frame and the plate frame holder is driven independently, and the vertical drive motor on the plate frame holder side is driven independently of the front and rear.
[0011]
According to a fourth aspect of the present invention, there is provided a screen printing method comprising: a printing screen plate including a plate frame and a screen held by the plate frame; and a squeegee head reciprocating along the screen. A printing medium such as a band-shaped sheet or film wound in a roll, is sequentially conveyed to a predetermined position on a printing table by a predetermined amount, and the screen frame holder of the screen plate is aligned. And a screen printing method for continuously printing on the substrate.
Mounting the printing table on a fixed plate, mounting an alignment table on the fixed plate via an alignment unit, providing a plate frame holder on the alignment table so as to be vertically movable, and providing an alignment camera on the alignment table; After raising the holder and lowering the printing table to move the printing material, the printing table is raised, the alignment camera is moved forward to the printing material side, and the mark of the printing material is read by the alignment camera. The plate frame holder is aligned with the alignment frame by the alignment unit to correct the misalignment. After the alignment of the plate frame, the alignment camera is moved backward, and the plate frame holder is lowered to print the printing object.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a screen printing apparatus and a printing method according to the present invention will be described in detail with reference to the drawings.
FIGS. 1 to 5 (a) and 5 (b) show a screen printing apparatus and a printing method according to the present invention, respectively. FIGS. 1 to 4 are side explanatory views of each step by the screen printing apparatus. 5A and 5B show different embodiments of the present invention. FIG. 5A is a front view, and FIG. 5B is a side view. As shown in FIG. 6, the printed material is formed from a belt-like sheet or film, and the roll-shaped printed material is linearly stretched from the feeding portion to the winding portion by the transport device.
[0013]
As shown in FIGS. 1 to 4, the screen printing apparatus 21 has a fixing plate 25 provided on a base side of a printing press main body 23, and a printing table 26 is attached to the fixing plate 25. I have. A printing section 28 is provided above the printing table 26. The printing table 26 is provided so as to be vertically movable between printing and non-printing by a conventionally known mechanism.
[0014]
The printing unit 28 includes a printing screen plate 29 including a plate frame 29a and a screen 29b held by the plate frame 29a, and a squeegee 31 and a scraper 31a reciprocating along the screen 29b. And a head 30. The detailed description of the driving mechanism of the printing unit 28 is omitted. The printing material 33 such as a belt-shaped sheet or film wound in a roll is sequentially conveyed to a predetermined position of the printing table 26, and the printing material 33 such as a belt-like sheet or film is supplied to the screen 29b by paste or printing. Print continuously with ink or the like. The squeegee 31 is held by a squeegee holder (not shown).
[0015]
An alignment table 36 is attached to the fixed plate 25 via an alignment unit 35. The alignment unit 35 has an x, y, θ drive mechanism. Accordingly, the alignment table 36 is driven in the x, y, and θ directions. A plate frame holder 41 is provided on the alignment table 36 so as to be vertically movable.
[0016]
A support frame 42 extending in the vertical direction is provided on the alignment table 36, and a plate frame holder 41 extending in the horizontal direction is provided on the support frame 42. The plate frame holder 41 holds the printing screen plate 29. The plate frame 29a is attached. The upper part of the front plate frame support frame 42 and the plate frame holder 41 are supported by the engagement of the elongated hole 41a and the pin 42a, and can rotate about the opposite pin 42b.
[0017]
The plate frame holder 41 is moved up and down by a vertical drive mechanism 45. The vertical drive mechanism 45 is provided at a front part and a rear part of the alignment table 36. A front vertical motor 47 and a rear vertical motor 48 of the vertical drive mechanism 45 are mounted on a support bracket 50 provided on the alignment table 36.
[0018]
A frame up / down motor 27 attached to the gantry 22b drives a frame up / down movement mechanism 24 attached to the gantry 22b via an endless belt (not shown) to move up and down the frame 22 on which the squeegee head 30 is placed. A pair of upper and lower pulleys 52 is rotated by a frame front vertical movement motor 47 and a plate frame rear vertical movement motor 48, and the plate frame support frame 42 is connected to the endless belt 53 wound around the pulleys 52 via a connecting member 54. The plate frame support frame 42 is moved up and down by the rotational drive of the plate frame front vertical movement motor 47 and the plate frame rear vertical movement motor 48, and the plate frame holder 41 is vertically moved by the vertical drive mechanism 45. When the plate frame front vertical movement motor 47 and the plate frame rear vertical movement motor 48 are simultaneously operated by this mechanism, clearance setting and vertical movement can be performed. Operation becomes possible.
[0019]
The alignment table 36 is provided with an alignment camera 61 formed from a CCD camera or the like. The alignment camera 61 is attached to a column 63 provided on the alignment table 36 via a slide mechanism 65 extending in the front-rear direction.
[0020]
The alignment camera 61 is moved forward by the slide mechanism 65 toward the printing substrate 33 with the plate frame holder 41 raised, and after alignment of the plate frame, the alignment camera 61 is moved backward by the slide mechanism 65 to form the plate frame. The holder 41 is lowered, the print table 26 is raised to a predetermined position, and the printing object 33 is printed.
[0021]
The plate frame alignment by the alignment camera 61 can use a conventionally performed method. That is, although not shown, it is assumed that printing can be performed at an accurate position if the mark A provided on the plate and the mark B provided on the printing material such as a film coincide with each other. Printing is performed, and the mark A printed by the dummy printing is set and fixed so as to move to the center of the field of view by moving the alignment camera 61.
[0022]
Here, the position and shape of the mark A in the pattern of the plate are registered. Next, the camera recognizes the mark B of the printing material 33 such as a loaded film or the like, and moves the center position of the mark B to the center position of the mark A in the registered pattern of the printing plate using the alignment table 36, and performs alignment. Is completed.
[0023]
Next, the screen printing method of the present invention will be described with reference to FIGS.
First, as shown in FIG. 1, the frame vertical movement 24 is operated, the frame 22 and the squeegee head 30 are raised, and simultaneously, the vertical drive mechanism 45 is operated, the plate frame support frame 42 is raised, and the plate frame holder 41 is raised. . At the same time, the print table 26 is lowered. Thus, the alignment camera 61 can be moved forward by the slide mechanism 65 toward the printing substrate 33, and the workpiece can be fed by moving a continuous printing substrate 33 such as a film from the back to the front. After the work is transported, the print table 26 is raised to a predetermined position.
[0024]
Next, as shown in FIG. 2, the alignment camera 61 is advanced to perform plate frame alignment. The mark of the printing material is read by the alignment camera 61, and the plate frame holder 41 is driven by the x, y, θ drive mechanism of the alignment unit 35 to perform plate frame alignment, correct the displacement, and after the plate frame alignment, FIG. As shown in (2), the alignment camera 61 is moved backward.
[0025]
Then, as shown in FIG. 4, the frame 22 and the plate frame holder 41 are lowered, and the squeegee 31 which reciprocates along the screen 29b of the printing screen plate 29 is lowered to print on the printing material 33. Subsequently, the frame up / down movement mechanism 24 is operated to raise the frame 22 and the squeegee head 30, and at the same time, the squeegee 31 is raised, the plate frame up / down drive mechanism 45 is operated, and the plate frame support frame 42 and the plate frame holder 41 are raised. The process proceeds to the step shown in FIG.
[0026]
5 (a) and 5 (b) show different embodiments of the present invention. Portions corresponding to the configurations shown in the above-described embodiments are denoted by the same reference numerals and further detailed description is given. Although the description is omitted, the alignment camera 61 is provided on the plate frame 29a of the printing screen plate 29 via a slide mechanism 71 so as to be able to advance and retreat, and the plate frame 29a is attached to the alignment unit 35. It has become. Also in this configuration, plate frame alignment can be performed.
[0027]
【The invention's effect】
As described above, according to the screen printing apparatus of the first aspect of the present invention, the printing table is mounted on the fixed plate, the alignment table is mounted on the fixed plate via the alignment unit, and the plate is mounted on the alignment table. Since the frame holder is vertically movable and an alignment camera is provided on the alignment table, there is no risk of twisting long printed materials such as rolled sheets or films. Screen printing and the alignment camera can be operated at the same time during alignment, the alignment mechanism structure is simple and economical, rigidity is obtained, and the influence of dust generation on the printing material is reduced. Can be prevented.
[0028]
According to the screen printing apparatus of the second aspect of the present invention, the printing table is mounted on the fixing plate, the alignment table is mounted on the fixing plate via the alignment unit, and the plate holder is moved up and down on the alignment table. In addition to being movably provided, an alignment camera is provided on the alignment table, and the alignment camera is movably provided on the printing table side of the printing table, so that a long printing medium such as a band-shaped sheet or film can be formed. Precise and high-speed screen printing is possible without kinking, and the screen plate and alignment camera can be operated at the same time during alignment. The alignment mechanism structure is simple, economical, and rigid. In addition, it is possible to prevent the influence of dust generation on the print substrate.
[0029]
Further, according to the screen printing apparatus of the third aspect of the present invention, the vertical movement mechanism of the frame and the plate frame holder is driven independently, and the vertical drive motor on the plate frame holder side is independent of the front and rear. The frame and plate frame holder are driven independently, the clearance between the plate and the work is set by the plate frame holder up and down mechanism, and the plate frame holder is moved up and down independently of the front and back. A detachment operation for peeling off the work is also possible.
[0030]
According to the screen printing method of the fourth aspect of the present invention, a printing table is mounted on a fixed plate, an alignment table is mounted on the fixed plate via an alignment unit, and a plate frame holder is vertically mounted on the alignment table. The printing apparatus is movably provided and an alignment camera is provided on the alignment table. After the plate holder is raised and the printing table is lowered to move the printing object, the printing table is raised and the alignment camera is mounted. Move the printer forward to the printed material side, read the mark on the printing material with the alignment camera, correct the misalignment by aligning the plate frame holder with the plate frame using the alignment unit, and after realigning the plate frame, move the alignment camera backward to move the plate frame. Since the holder is lowered to print the substrate, a band-like sheet or There is no risk of kinking of a long printing material such as a film, accurate and high-speed screen printing is possible, the screen plate and the alignment camera can be operated simultaneously during alignment, and the alignment mechanism structure is simple. It is economical, has high rigidity, and can prevent the influence of dust on printed materials.
[0031]
ADVANTAGE OF THE INVENTION According to the present invention, there is no possibility that a long printing material such as a belt-like sheet or a film is twisted, accurate and high-speed screen printing can be performed, and the screen plate and the alignment camera are simultaneously operated during alignment. The alignment mechanism structure is simple and economical, has high rigidity, and has little effect on dust on the printing material.The plate frame vertical movement mechanism provides accurate and smooth clearance and release operation. The resulting screen printing apparatus and printing method can be obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory side view of a screen printing apparatus according to the present invention when a plate frame holder is raised.
FIG. 2 is an explanatory side view showing a state in which the alignment camera of the screen printing apparatus according to the present invention is moved forward toward the printing medium.
FIG. 3 is an explanatory side view of the screen printing apparatus according to the present invention in a state where the alignment camera is retracted and the plate frame holder is lowered.
FIG. 4 is an explanatory side view of the screen printing apparatus according to the present invention in a state where a squeegee is lowered and printing is performed.
FIGS. 5A and 5B show different embodiments of the screen printing apparatus according to the present invention, wherein FIG. 5A is a front view and FIG. 5B is a side view.
FIG. 6 is an explanatory front view of a conventional screen printing apparatus.
[Explanation of symbols]
21 Screen Printing Apparatus 22 Frame 22b Mount 23 Printer Main Body 24 Frame Vertical Movement Mechanism 25 Fixed Plate 26 Print Table 27 Frame Vertical Movement Motor 28 Printing Unit 29 Screen Plate for Printing 29a Plate Frame 29b Screen 30 Squeegee Head 31 Squeegee 31a Scraper 33 Printed object 35 Alignment unit 36 Alignment table 41 Plate frame holder 41a Slot 42 Plate frame support frame 42a Pin 42b Pin 45 Plate frame vertical drive mechanism 47 Plate frame front vertical motor 48 Plate frame rear vertical motor Reference Signs List 50 Support bracket 52 Pulley 53 Endless belt 54 Connecting member 61 Alignment camera 63 Support column 65 Slide mechanism 71 Slide mechanism

Claims (4)

A printing screen comprising a plate frame and a screen held by the plate frame; and a frame on which a squeegee head reciprocating along the screen is placed, and a belt-shaped roll wound. A printing material such as a sheet or a film is sequentially conveyed to a predetermined position of a printing table by a predetermined amount, a screen frame holder of the screen plate is aligned, and a screen capable of continuously printing on the printing material is provided. In a printing device,
The printing table is mounted on a fixed plate, an alignment table is mounted on the fixed plate via an alignment unit, a plate frame holder is provided on the alignment table so as to be vertically movable, and an alignment camera is provided on the alignment table. Screen printing device. A printing screen comprising a plate frame and a screen held by the plate frame; and a frame on which a squeegee head reciprocating along the screen is placed, and a belt-shaped roll wound. A printing material such as a sheet or a film is sequentially conveyed to a predetermined position of a printing table by a predetermined amount, a screen frame holder of the screen plate is aligned, and a screen capable of continuously printing on the printing material is provided. In a printing device,
The printing table is mounted on a fixed plate, an alignment table is mounted on the fixed plate via an alignment unit, a plate frame holder is provided on the alignment table so as to be vertically movable, and an alignment camera is provided on the alignment table. A screen printing apparatus characterized in that a camera is provided so as to be movable toward a printing substrate on a printing table. A printing screen comprising a plate frame and a screen held by the plate frame; and a frame on which a squeegee head reciprocating along the screen is placed, and a belt-shaped roll wound. A printing material such as a sheet or a film is sequentially conveyed to a predetermined position of a printing table by a predetermined amount, a screen frame holder of the screen plate is aligned, and a screen capable of continuously printing on the printing material is provided. In a printing device,
A screen printing apparatus wherein the vertical movement mechanism of the frame and the plate frame holder is driven independently, and the vertical drive motor on the plate frame holder side is driven independently of the front and rear. A printing screen comprising a plate frame and a screen held by the plate frame; and a frame on which a squeegee head reciprocating along the screen is placed, and a belt-shaped roll wound. A screen printing method in which a printing material such as a sheet or a film is sequentially conveyed to a predetermined position on a printing table by a predetermined amount, a plate frame holder of the screen plate is aligned, and printing is continuously performed on the printing material. ,
Mounting the printing table on a fixed plate, mounting an alignment table on the fixed plate via an alignment unit, providing a plate frame holder on the alignment table so as to be vertically movable, and providing an alignment camera on the alignment table; After raising the holder and lowering the printing table to move the printing material, the printing table is raised, the alignment camera is moved forward to the printing material side, and the mark of the printing material is read by the alignment camera. A screen characterized by correcting the misalignment by aligning the plate frame holder with a plate frame by an alignment unit, moving the alignment camera backward after the plate frame alignment, lowering the plate frame holder, and printing the printing object. Printing method.

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