JPH05220930A - Ink pot and mounting device therefor in pad printing press - Google Patents

Abstract

PURPOSE:To conduct pad printing with a good efficiency by 2 method wherein an ink pot is disposed on a plate in a close a contact state, and a support stay of a pot support frame fitted over the ink pot is fixed to a mounting stay of a forward/reverse movable frame of a pad printing press. CONSTITUTION:An ink pot P is disposed on a plate S in a close contact state. A pot support frame 7 is fitted over the ink pot P. An upper end part of a support stay 9 is fixed to a mounting stay 23 of a movable frame 13. Prepared ink is contained in the ink pot P, and the ink pot P is covered with a cap. While the movable frame 13 is moved from left to right by actuating a forward/ reverse moving device, the prepared ink is applied on the travel line of the ink pot P including a recessed mark 6. Thereafter, while the movable frame 13 is moved from right to left, excess ink is removed by a doctor blade 17, and a fixed amount of ink is reserved in the recessed mark 6. A printing pad 15 is lowered to suck up the ink in the recessed mark 6, thereafter being moved upward. While the movable frame 13 is again moved from left to right, ink is applied on the plate S, and the printing pad 15 is moved above a work W. The printing pad P is lowered to make printing on the work W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink pot and its mounting device in a pad printing machine.

[0002]

2. Description of the Related Art Conventionally, when a pad printing machine is used to perform pad printing of characters, figures, symbols, etc. on a predetermined position on the surface of a work such as various small parts, an ink tray in the form of ink is used. On the hill side of the ink tray, set the plate making with recesses of letters, figures, symbols, etc.,
In addition, after putting the prepared ink on the pond side of the ink tray, first scrape the ink on the pond side with an ink coater (rubber spatula), apply it on the plate making including the recess, then the doctor. By scraping the ink applied to the plate-making surface including the recess with the blade, the ink is filled in the recess of the plate-making surface and stored, and it is adsorbed to the printing pad, and the printing pad is set at a predetermined position on the work set separately. Pad printing is performed on the work by pressing it.

[0003]

However, in the case of the ink tray having the above-mentioned ink-jet structure, since it has an open structure, the ink solvent scatters in the air and changes such as a decrease in the amount of the solvent occur quickly. The print quality is likely to have a problem. For example, if the amount of the solvent is too large, the print is bleeding or pinholes are likely to be formed, and if the amount of the solvent is too small, the printing is defective. To do so, an expert must constantly check the ink density and the product performance, and manage them so that they always maintain a good condition.
On the other hand, the scattering of the ink solvent from the ink tray with the open structure impairs the working environment because the ink solvent contains substances harmful to the human body. Therefore, it is necessary to cover the upper part of the entire apparatus and take out the scattered gas outdoors by vacuum means or remove it by a blower apparatus using activated carbon or the like.

In addition, the printing ink is quickly consumed due to the above-mentioned causes, and the ink on the pond side is removed by an ink coater (rubber spatula) having a width approximately equal to the inner width of the tray with respect to the recess of the relatively small plate making surface. After scraping up, applying it on the plate making containing the recess, then scraping the ink applied to the plate making surface containing the recess with the doctor blade, and returning to the pond side of the ink tray is repeated, so more and more, It is supposed to accelerate the consumption of printing ink. In particular, the ink used in this type of pad printing machine is expensive, and therefore accounts for a large proportion of the printing cost.

[0005]

Therefore, according to the present invention,
First, as an alternative to the ink tray having the ink-jet structure that can be used for pad printing using a conventional pad printer, a metal tubular body 1 having a cap 5 on its head is attached. And an ink pot in a pad printing machine having a container structure in which the lower outer periphery of the tubular body 1 is formed in a wedge shape in cross section, and the wedge-shaped end portion 3 of the lower end outer periphery thereof is closely supported on the plate making S. Secondly, as an invention that does not require an ink coater and an ink tray having a sill structure in a conventional pad printer, the ink applied on the plate S including the concave mark 6 is scraped off by a doctor blade 17, and the concave mark 6 is removed. In a pad printing machine in which the printing pad 15 is made to adsorb the ink filled in to the printing pad 15 and then printed at a predetermined position of the work W, the ink pot P is closely attached to the plate making S, and The support stay 9 of the pot support frame 7 is fitted to the pot P, mounting stay 2 hanging down form the forward and backward movable movable frame 13 in the pad printing machine M
3, the ink frame P and the doctor blade 17 slide on the plate making S by the forward and backward movement of the movable frame 13, and the ink is supplied to the plate making S including the concave mark 6 and the plate making S.
An ink pot mounting device for a pad printing machine is provided which is configured to scrape ink from above.

[0006]

When the movable frame 13 of the pad printing machine M is moved back and forth, the ink pot P and the doctor blade 17 slide on the plate S including the concave mark 6, and the prepared ink K of the ink pot P is moved to the concave mark 6. Is applied to the plate making S, and the ink applied to the plate making S is scraped off, and the ink filled in the concave marks 6 is adsorbed to the printing pad 15 and the predetermined position of the work W is reached. Pad printing is performed by pressing on.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the ink pot P and its mounting jig G according to the present invention will be described. Reference numeral 1 is a metal cylindrical body having an opening at the bottom, and the lower outer periphery of the cylinder is a wedge-shaped cylinder. The wedge-shaped end portion 3 is formed on the portion 2 and the outer peripheral edge of the lower end thereof is smoothly pointed. Reference numeral 4 denotes an engagement step portion provided on the outer periphery of the lower portion of the tubular body 1. A cap 5 is attached to the head of the tubular body 1. S is a rectangular plate-shaped metal plate having a smooth surface, and the prepared ink contained in the ink pot P has a container structure in which the wedge-shaped end portion 3 of the ink pot P is closely supported on the surface thereof. I try not to let K leak out. Reference numeral 6 denotes a concave mark such as characters, figures, symbols, etc., which is provided on the plate making S by etching. 7
Is a rectangular pot support frame having a circular opening inside, and is supported by being fitted into the engagement step portion 4 of the ink pot P. Reference numeral 8 denotes a projecting portion that is formed so as to project at the center of the tip of the pot support frame 7. A support stay 9 fitted into the projecting portion 8 at substantially right angles is pivotally provided by a pin 10 to support the support stay 9 and the pot. The frame 7 and the frame 7 are formed in a substantially L shape on the front surface. Reference numeral 11 denotes a coil spring that is interposed between the support stay 9 and the pot support frame 7, and the pot support frame 7 is appropriately expanded and biased against the support stay 9. 1
Reference numeral 2 denotes a pushing convex portion formed in a ship bottom shape toward the center of the bottom portion at both left and right sides of the pot supporting frame 7, and the expanding biasing force of the coil spring 11 causes the pushing convex portion 12 of the pot supporting frame 7.
The ink pot P is made to work via the.

Next, the outline of the pad printing machine M for mounting the attachment jig G of the ink pot P of the present invention will be described with reference to FIGS. 4 and 5, and 13 is a movable frame of the pad printing machine M. In addition, it is formed so as to be movable back and forth with respect to the main body frame 14 in the front-back direction, that is, the left-right direction in FIGS. A silicone rubber printing pad 15 is attached to the lower end of the rod of an elevating cylinder 16 supported by the front end of the movable frame 13, and is vertically movable by the elevating cylinder 16. . Reference numeral 17 denotes a doctor blade for scraping off the printing ink applied on the plate-making S set on the machine base 18 of the pad printing machine M.
It is suspended by a doctor blade pressure adjusting cylinder 20 arranged on the rear side of the No. 3 and a support rod 22 biased and supported by a coil spring 21. 23 is a movable frame 1
3 is a mounting stay that is formed at the rear end portion of the ink container 3, and the mounting jig G of the ink pot P according to the present invention is fixed to the lower end portion thereof with bolts 24. Conventionally, an ink coater for advancing and retracting a sill-shaped ink tray has been urged and attached to the mounting stay 23, but in the case of the present invention, the existing mounting stay 23 is used as it is. Instead, the attachment jig G of the ink pot P is fixed. Reference numeral 25 denotes a work table attached at an appropriate height position on the front side of the machine base 18, which is a support bar 2 vertically supported.
An operator manually fits and supports the works W one by one.

First, the ink pot P is set on the plate S, and the pot support frame 7 is fitted into the ink pot P,
The upper end of the support stay 9 is fixed to the mounting stay 23 of the movable frame 13, the prepared ink K is put in the ink pot P, and then the cap 5 is capped. Therefore, when the advancing / retreating moving device (not shown) in the pad printing machine M is operated, the plate making S installed on the main body frame 14 or the machine base 18 is performed.
On the other hand, the movable frame 13, the attachment jig G of the ink pot P, the ink pot P, and the like are all moved backward, that is, in FIG.
Move from the left position to the right position. Thus, the prepared ink K of the ink pot P is applied on the moving line of the ink pot P including the concave mark 6 over the width of the ink pot P. Next, the entire movable frame 13 moves forward, that is, moves from the right side position to the left side position in FIG. 5, whereby the doctor blade 17 scrapes off the excess ink on the plate making S, and thereby the concave mark is formed. 6 is filled with a fixed amount of ink and stored. And FIG.
As shown in, the printing pad 15 that has moved forward to just above the concave mark 6 is moved downward, and the ink of the concave mark 6 is adsorbed to the printing pad 15 and then moved upward. Again, the movable frame 13 as a whole is moved backward from the left side position to the right side position in FIG. 4 to perform the ink application processing on the plate S, and at the same time, the printing pad 15 is moved backward to the position just above the work W. By moving down
Pad printing is performed on the work W set immediately below it. Then, the printing pad 15 is moved up again, and then the movable frame 13 is moved forward, whereby the processing operation such as the scraping processing of the excess ink by the doctor blade 17 is repeated, thereby improving the efficiency. Good printing work is done.

[0010]

As described above, according to the present invention, firstly, there is provided a metal cylindrical body having a cap on its head.
Since the lower outer periphery of the tubular body is formed in a wedge shape in cross section, the wedge-shaped end portion of the lower end outer periphery thereof is provided in an ink pot in a pad printing machine having a container structure that is closely supported on a plate making plate.
Compared with the ink tray of the ink jet structure used in the conventional pad printer, the consumption degree of the printing ink can be significantly suppressed, and the printing cost can be significantly reduced, and the ink pot in the present invention As such, it can serve beneficially as a replacement for ink coaters in conventional pad printing machines. Secondly, the ink applied to the plate making including the concave mark is scraped off by a doctor blade, the ink filled in the concave mark is adsorbed to the printing pad, and then the ink is printed at a predetermined position on the work. In a pad printing machine, an ink pot is installed in close contact with the plate making, and a support stay of a pot support frame fitted in the ink pot is attached to a mounting stay formed by hanging from a movable frame that is movable back and forth in the pad printing machine. Attach,
A pad printing machine configured such that the ink pot and the doctor blade slide on the plate making by moving the movable frame forward and backward to supply ink to the plate making including the concave mark and scrape ink from the plate making. Since the ink pot mounting device in the above has been provided, the ink coater and the ink tray of the ink-jet structure in the conventional pad printing machine are unnecessary,
Not only does it contribute to efficient pad printing, but it also brings about various effects such as being able to easily install existing pad printing machines without making special improvements.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a state in which a prepared ink is put in a container structure composed of a plate-making plate and an ink pot installed thereon.

FIG. 2 is a partially cutaway front view showing a state in which the ink pot is fitted in the attachment jig of the ink pot.

FIG. 3 is an exploded perspective view of an ink pot and its mounting jig.

FIG. 4 is a schematic view showing a state in which a mounting jig of an ink pot is set on a mounting stay in a pad printing machine and a movable frame is at a forward position.

FIG. 5 is a schematic diagram showing a state in which the movable frame is in the retracted position.

[Explanation of symbols]

 P Ink pot S Plate making K Preparation ink G Mounting jig M Pad printing machine W Work piece 1 Cylinder 2 Wedge body 3 Wedge end 4 Engagement step 5 Cap 6 Concave mark 7 Pot support frame 8 Projection 9 Support stay 10 pins 11 Coil spring 12 Pressing convex portion 13 Movable frame 14 Main body frame 15 Printing pad 16 Elevating cylinder 17 Doctor blade 18 Machine stand 19 Doctor blade holder 20 Adjustment cylinder 21 Coil spring 22 Support rod 23 Mounting stay 24 Bolt 25 Work table 26 Support rod

Claims (3)

[Claims] 1. A metal tubular body 1 having a cap 5 capped on a head thereof, wherein a lower outer periphery of the tubular body 1 is formed into a wedge-shaped cross section, and a wedge-shaped end portion 3 of a lower end outer periphery thereof is plate-making. An ink pot in a pad printing machine having a container structure in which it is closely supported on S. 2. The ink applied to the plate S including the concave mark 6 is scraped off by a doctor blade 17, the ink filled in the concave mark 6 is adsorbed to a printing pad 15, and then printed at a predetermined position on the work W. In the pad printing machine configured as described above, the ink pot P is installed in close contact with the plate making S, and the support stay 9 of the pot support frame 7 fitted in the ink pot P is movable so as to be movable back and forth in the pad printing machine. It is attached to a mounting stay 23 formed so as to hang down from the frame 13, and the ink pot P and the doctor blade 17 are slid on the plate making S by advancing and retracting the movable frame 13 to supply ink to the plate making S including the concave mark 6. An ink pot mounting device in a pad printing machine, characterized in that the ink is scraped from the plate making S. 3. The ink pot P is a metallic cylindrical body 1 with a cap 5 capped on its head, and the lower end edge of the cylindrical body 1 is formed to have a wedge-shaped cross section, and the wedge-shaped end portion 3 is formed. The ink pot attachment device in a pad printing machine according to claim 2, wherein the container structure is such that the plate is closely attached to the plate making S.