JP2578101Y2 - Screen printing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen printing machine, and more particularly to bleeding or the like generated on a screen printing plate when a series of processes such as positioning, feeding, printing, and discharging of a printing material are automatically processed. The present invention relates to a screen printing machine capable of removing blemishes.

[0002]

2. Description of the Related Art For example, positioning and feeding of various prints (workpieces) such as printed circuit boards, printing and coating of emulsions, etc.
In a fully automatic screen printing machine that automatically performs a series of processes such as discharging, when printing is performed on a printing material set on the back side of the screen printing plate by a squeegee running on the screen printing plate, this is repeated a plurality of times. And bleeding occurs on the screen printing plate. This bleeding is caused by the ink flowing out of the back surface of the screen printing plate outside the portion where the ink passes, that is, by the ink wraparound phenomenon.

When such ink bleeding occurs,
The work was temporarily stopped, and the wraparound ink adhering to the back surface of the screen printing plate was cleaned and removed.

[0004]

However, the temporary suspension of the work for removing and cleaning the sneak ink not only disables the automatic continuous processing of all processes, but also removes and cleans it manually. Was extremely troublesome.

[0005] In view of the above, the present invention has been devised in view of the above-mentioned various circumstances, and is mainly applied to the back side of a screen printing plate in a fully automatic screen printing machine for automatically performing a series of printing processes. An object of the present invention is to provide a screen printing machine capable of automatically removing and cleaning the generated ink bleed and improving the working efficiency.

[0006]

In order to achieve the above-mentioned object, according to the present invention, the squeegee 3 of the squeegee unit 1 which reciprocates on a screen printing plate S arranged on a printing substrate (W) is provided. In a device in which printing is applied to the surface of the printing material (W) by rubbing, a dummy placed on the printing material (W) and placed on the back surface of the screen printing plate S when the printing material (W) is loaded. A blank printing mechanism 10 having a blank printing squeegee 21 that can move up and down to press and rub a screen printing plate S on paper P is provided.

[0007] The blank printing mechanism 10 includes left and right mounting means 11 which are removably attached to the squeegee unit 1, and is mounted between the left and right mounting means 11.
Holder bases 14 which are respectively raised and lowered by lifting means (17) provided therein, and strip plates before and after which are inserted into the lower portion of the holder base 14 and screwed and pressed to form a recess at the lower end edge. Squeegee holder 22
A and 22B, and an empty printing squeegee 21 which is fixed between the squeegee holders 22A and 22B so as to be detachable.

[0008]

In the screen printing machine according to the present invention, when a series of printing processes such as positioning, feeding, printing, and discharging of a printing material (W) are automatically processed, the printing material ( When the dummy paper P set for every suitable number of W) is put on the back surface of the screen printing plate S, the blank printing mechanism 10 is operated correspondingly and the empty printing mechanism 10 is operated. The printing squeegee 21 is moved up and down.

When the blank printing squeegee 21 travels together with the squeegee unit 1 in a lowered state, the screen printing plate S
The ink K that has been rubbed on the upper surface and adhered to the back surface of the screen printing plate S is transferred and adhered onto the dummy paper P. This transfer adhesion removes and cleans the ink K on the back surface of the screen printing plate S. After the cleaning, the blank printing squeegee 2 is removed.
1 returns to the original position, and the printing operation is restarted.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a squeegee unit in a screen printing machine according to an embodiment of the present invention; A squeegee mechanism 2 having a squeegee 3 that moves down during printing and rubs on the screen printing plate S surface with respect to a workpiece W that is a printing object set on a table, and moves down and moves forward when returning ink. After contacting the squeegee 3, the doctor mechanism 5 having a scopper 6 which rises with the squeegee 3 and scoops up the ink K
(See FIG. 1).

The squeegee unit 1 is provided with a blank printing mechanism 10 having a blank printing squeegee 21 which can be moved up and down substantially in parallel with the squeegee 3 of the squeegee mechanism 2. The squeegee unit 1 has a twin squeegee structure by being arranged in a pair along the front and rear in the running direction. The blank printing mechanism 10 includes left and right attachment means 11 detachably attached to the squeegee pipe 4 of the squeegee mechanism 2, and is mounted between the left and right attachment means 11. It comprises a holder base 14 which is raised and lowered by means (17), and a blank printing squeegee 21 which is detachably fixed to the holder base 14.

The mounting means 11 is a unit holder 12 which surrounds and grips the squeegee pipe 4 in the form of a square pipe, and which has a lock screw 13 screwed forward and backward, and is fixed to the squeegee pipe 4 by tightening and loosening the lock screw 13. It can be detached and attached (see FIG. 2).

The holder base 14 is mounted and fixed between left and right slide plates 16 which are vertically slid and guided by guide means 15 integrally formed with the unit holder 12 in the right and left mounting means 11, respectively. The cross section of the opening has a groove shape. Further, the slide plate 17 is connected to the floating stay 19 connected to the cylinder rod of the elevating cylinder 17 fixed to the unit holder 12 via the floating joint 18, so that the holder base 14 is raised and lowered by the operation of the elevating cylinder 17. It is supposed to be.

The blank printing squeegee 21 is formed of the same material as the squeegee 3, and is sandwiched between the band-shaped squeegee holders 22A and 22B before and after the hollow at the lower end. , The lower edge of which is
When the squeegee 3 is at the ascending position by the elevating means (17), it is set at a position slightly higher than the lower end edge of the squeegee 3. Then, for example, the upper part of the front squeegee holder 22A is inserted into the holder base 14 and supported by the holder base 14 by being screwed and pressed by the squeegee clamp screw 23 which is screwed from the front of the holder base 14 so as to be able to move forward and backward. There is something to be done.

The blank printing mechanism 10 is used to continuously print on a predetermined work W by running of the squeegee unit 1 or when it is time to cause bleeding, for example, when printing is performed 50 times. The operation is performed in response to the dummy paper P being set on the work W and carried in when the operation is repeated about twice. That is, when the dummy paper P is carried in together with the work W, the blank printing squeegee 21 descends and travels, and rubs on the screen printing plate S surface, so that the ink K on the back surface of the screen printing plate S is deposited on the dummy paper P. The cleaning and removing operation by this transfer is controlled so as to be repeated a plurality of times if necessary.

Next, an example of the operation will be described. For example, when a series of printing processes such as positioning, loading, printing, and discharging of a work W are automatically processed, an appropriate number of the works W to be loaded are processed. The dummy paper P is set for each printing operation, and the dummy printing paper P is loaded together with the work W, and the blank printing mechanism 10 is controlled so as to operate.

That is, when the dummy paper P is loaded on the lower surface of the screen printing plate S, as shown in a dashed line in FIG. 1 and FIG. Is run. As the blank printing squeegee 21 rubs on the screen printing plate S by the traveling, the ink K attached to the back surface of the screen printing plate S is transferred onto the dummy paper P, thereby removing and cleaning the ink K. Is performed. After the removal and cleaning, the blank printing squeegee 21 returns to the original position and waits for the next operation, while appropriately removing the dummy paper P on the discharged work W. Then, as before, the squeegee 3 descends to perform a printing operation, and
The scopper 6 descends to perform an ink leveling (ink return) operation.

[0018]

Since the present invention is configured as described above, for example, in a fully automatic screen printing machine that automatically performs a series of print coating processes on various types of printing materials (W), a printing material to be input is provided. (W), the dummy paper P is set on it, and the blank printing squeegee 20 is moved up and down in conjunction with the loading of the printing material (W), so that blank printing is performed in appropriate quantities. In addition, the bleeding of the ink K generated on the back surface of the screen printing plate S can be automatically removed and cleaned, and since there is no need to interrupt a series of printing processing operations for the removing operation, it is very useful for improving the working efficiency. .

That is, in the present invention, the blank printing mechanism 10 having the blank printing squeegee 21 which can vertically move and press the screen printing plate S against the dummy paper P arranged on the back surface of the screen printing plate S is provided. This is because it is not necessary to interrupt a series of operations for automatically performing the printing application processing.

The blank printing mechanism 10 itself is mounted on the left and right mounting means 11 for mounting on the squeegee unit 1, and is mounted between the left and right mounting means 11, and the lifting means (17) provided on each of the mounting means 11 is provided. ), A squeegee holder 22A, 22B in the form of a front and rear plate fixed to the holder base 14, and an empty printing squeegee 21 detachably sandwiched between the squeegee holders 22A, 22B. Therefore, the lifting control can be reliably performed by an instruction to the lifting means (17), and the lifting operation is extremely smooth. Not only that, the blank printing mechanism 10 itself can be easily attached to the existing skid unit 1 via the left and right attachment means 11, while the printing material (W) is used for removing and cleaning the bleeding of the ink K. ), The dummy paper P need only be set and loaded together with the printing material (W), so that there is no need for a special supply and discharge means for the dummy paper P itself, and a major modification of the existing screen printing machine. Is completely unnecessary. Furthermore, the blank printing squeegee 21
Is held by the front and rear squeegee holders 22A and 22B which are detachably attached to the holder base 14, so that the replacement or the like due to the consumption or the like is easy.

[Brief description of the drawings]

FIG. 1 is a front sectional view of an embodiment of the present invention.

FIG. 2 is a front sectional view of a main part of the same.

FIG. 3 is a partially cutaway plan view.

FIG. 4 is a partially cutaway side view.

[Explanation of symbols]

K Ink P Dummy paper S Screen printing plate W Work 1 Squeegee unit 2 Squeegee mechanism 3 Squeegee 4 Squeegee pipe 5 Doctor mechanism 6 Scopper 10 Blank printing mechanism 11 Mounting means 12 Unit holder 13 Lock screw 14 Holder base 15 Guide means 16 Slide plate 17 Elevating Cylinder 18 Floating joint 19 Floating stay 21 Blank printing squeegee 22A, 22B
Squeegee holder 23 Squeegee clamp screw

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-4-232058 (JP, A) JP-A-5-177810 (JP, A) JP-A-3-178187 (JP, A) JP-A-57-178 167269 (JP, A) Japanese Utility Model Showa 61-47636 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B41F 15/08 303 B41F 15/12 B41F 15/40-15/44

Claims (1)

(57) [Scope of request for utility model registration] 1. A screen printing machine in which a squeegee of a squeegee unit that reciprocates on a screen printing plate arranged on a printing material rubs to apply printing to the surface of the printing material. A blank printing mechanism having a vertically movable blank printing squeegee that presses and rubs the screen printing plate against the dummy paper placed on the back of the screen printing plate with the input of the printing material is provided, and the blank printing mechanism is Left and right mounting means detachably attached to the squeegee unit, a holder base which is mounted between the left and right mounting means, and which is lifted and lowered by lifting means provided in each of the mounting means, and a lower part of the holder base. A strip-shaped squeegee holder before and after which is inserted and screwed down and has a recess at its lower edge, and A screen printing machine comprising: a blank printing squeegee detachably fixed while being held between holders.