KR102005783B1 - Automatic Pad Printing Machine - Google Patents

Abstract

The present invention, when printing a character, a picture, a logo, etc. using a pad on the surface of the to-be-printed, rapidly responding to changes in the various sizes and print positions of the to-be-printed, printing at a breakthrough speed and fully automated The present invention relates to an automatic pad printing machine which can automatically and continuously print ink to be applied to a production line to print quickly and continuously for a production speed of an injection molding machine.
The pad printing machine according to the present invention is a printing machine for printing a pattern of a letter, a picture or a logo by using a pad on an injection molded product (printed object), which is a resin or metal product. And a jig operating unit for fixing an ink supply unit for supplying and a to-be-printed object.

Description

Automatic Pad Printing Machine {Automatic Pad Printing Machine}

The present invention relates to a pad printing machine, and more particularly, in printing a character, a picture, a logo, etc. by using a pad on the surface of a to-be-printed object, it is possible to quickly respond to changes in various sizes and printing positions of the to-be-printed object. The present invention relates to an automatic pad printing machine which can automatically supply a to-be-printed object and ink and apply it to a fully automated production line.

The pad printing machine applies ink to a metal plate etched with various patterns such as letters, pictures or logos, and then presses the ink applied to the etched part with a pad to reprint the ink transferred to the pad (resin or metal). It is a printing machine that prints by retranslating it into a printing machine. It is mainly used for printing letters or logos on cases made of electronic resins, but recently, a metal plate pattern was attached to a mobile phone case. Pad printing is used to print with ink to form an antenna pattern.

Patent No. 952897 entitled "Printer for Display Device Panel and Printing Method thereof" has appeared. The patent discloses an X-axis moving unit installed to move a jig on which a to-be-printed object is mounted from side to side; And a Z-axis moving unit for moving the printing pad up and down, and a Z-axis moving unit for moving the printing pad to a printing point by moving the Y-axis moving unit forward and backward.

However, the printing apparatus has the following problems. First, it is a structure in which a plurality of print pads are connected and operated by one Y-axis moving unit, and one print pad is lowered and printed in a fixed state while a to-be-printed object is fixed, and then ascends in three directions (X, Y, Z). After printing pad is moved to its original position in the axial direction, the operation of returning to the original position after printing after the next printing pad is lowered must be repeated as much as printing position, so it takes too much time to print on a single to-be-printed object. There is a problem that the productivity is very low.

Secondly, since the print pad is moved one by one in three directions (X, Y, and Z axis directions) with one operation unit in a state where the to-be-printed object is fixed, the operation mechanism of the print pad is complicated and there is a high possibility of failure. In the case where the printing position is rotated by a predetermined angle or in an inclined portion, even if the printing pad is moved in three directions, the printing pad itself has a fixed direction, which makes it difficult to accurately print at the rotated position.

Third, if the model to be printed is changed after printing one model, the size of the printed matter, the printing location, and the position are all changed. Therefore, the operating stroke of the printing pad must be adjusted according to the model. It takes more than an hour, so productivity and accuracy are very low.

Fourth, because the pad printing machine is slow to print, it is impossible to match the production speed of the injection molding machine. Then, the injection molded product (printed object) produced by the injection machine is placed on the jig of the printing machine by the robot, and after printing, the ejected product (printed object) is removed. There is a problem, however, that injection molding (printing) production and printing cannot be applied to a fully automated production line.

In order to solve the above problems, the applicant of the present invention (inventor) has developed a patent registration No. 1403867 "Pad-type 5-degree printing machine", which is being used in a number of popular applications, there is a problem of semi-automatic. In other words, because the semi-automatic printing machine prints on the injection molding (printed object) with a pad printing machine, the injection machine can not match the speed of producing the injection molding product. There is a problem that the hand to be carried directly to the jig to print, and then to remove the printed matter from the jig after printing. Therefore, the emergence of a pad printing machine for full automation is urgently required.

The present invention has been made to solve the above problems, an object of the present invention, in printing a character, a picture or a logo, etc. using a pad on the surface of the to-be-printed, An automatic pad printing machine that can rapidly and continuously print at the production speed of an injection molding machine by automating the ink supply so as to respond to changes rapidly and print at a breakthrough speed, and to be applied to a fully automated production line. will be.

The automatic pad printing machine according to the present invention includes pads which are installed at equal intervals inside both sidewalls of a frame for printing onto a printed object, and operate independently up and down, respectively, and are provided for each pad to adjust a lifting speed of each pad. A pad speed control valve and a stroke length control lever for adjusting the stroke distance of each pad to move up and down are installed in the frame, and a cleaning tape winder is provided with a cleaning tape wound to remove ink from the pad after printing. A pad operating unit configured to move the frame back and forth on the base plate by operation of a servo motor; An ink supply unit which is automatically supplied with ink from the ink container to the ink cup, and has a corroded plate in which letters, pictures or logos are etched intaglio is installed under the ink cup so that the corroded plate moves forward and backward on the base plate; And a jig operating unit positioned in front of the pad operating unit, the jig operating unit having a jig fixing table configured to be placed on a substrate and moving in a horizontal direction on the base plate, wherein the pad is formed by a first air cylinder. The corrugated plate is moved up and down by a second air cylinder, and the pad transfers the ink filled in the intaglio of the corrugated plate to retransfer to the object to be placed on the jig fixing table. Characterized in that to be printed.

Preferably, the frame is moved along a first ball screw installed in the front-rear direction and connected to the rotary shaft of the first servo motor, and a pair of the first LM guides installed in the front-rear direction, and the jig fixing table is a second servo motor. It is connected to the rotating shaft of the second ball screw installed in the left and right directions, and moves along the pair of second LM guides installed in the left and right directions.

Preferably, a tubing pump is installed between the ink bottle and the ink cup so that a predetermined amount of ink is supplied from the ink bottle to the ink cup through the ink supply hose, and when the ink cup stores a predetermined amount or more of ink, the ink is discharged. Configured to discharge through the hose into the ink reservoir.

Preferably, a lower portion of the jig fixing table is further provided with a vacuum pump, and the position is fixed to the jig adjusting table by adsorbing the to-be-printed object by vacuum.

Preferably, one to six pads are installed at equal intervals in the left and right directions on both sides of the frame, and the cleaning tape winding machine is provided with drums on both side wall portions of the frame with the pads therebetween to clean the two drums. The tape is wound and the cleaning tape is moved while the drum rotates by driving the motor.

Since the pad printing machine according to the present invention is a method of moving a frame having a plurality of pads mounted thereon, when a frame moves to a printing position, a plurality of pads are moved at the same time, thereby reducing the time for each pad to move. Since the jig equipped with this jig changes position and prints continuously, printing is performed at a breakthrough speed while responding quickly to changes in various sizes and printing positions of the to-be-printed product.

In addition, the pad printing machine of the present invention could not be directly applied to the production line of the injection molding machine because the production speed of the injection molding machine was much faster than that of the printing machine (printed object). By supplying the ink to the ink at all times and changing the pad movement method, the printing speed is remarkably faster to match the injection speed of the injection molding machine. The removal operation can be applied directly to a fully automated production line by a robot, which significantly increases productivity and significantly reduces production costs.

1 is a front view of a pad printing machine according to the present invention.
2 is a side view of a pad printing machine according to the present invention.
3 is a view for explaining the ink supply unit and the jig operation unit.
4 is a view showing the initial position of the pad printing machine.
5 is a view showing a state in which the corrosion plate is advanced.
6 is a view for explaining a process of transferring the ink adhering to the corroded plate by advancing and descending the pad.
7 is a view for explaining a process of printing the ink transferred to the pad on the printed object.

The biggest technical feature of the pad printing machine according to the present invention is to change the feeding method of the pad and the method of supplying ink to the pad, thereby automatically supplying the injection molded product (subject) produced by the injection machine to the pad printing machine automatically by the robot. Post-printing removal can be applied directly to a fully automated production line.

The pad printing machine according to the present invention is a printing machine for printing a pattern of a character, a picture or a logo by using a pad on an injection molded product (printed object), which is a resin or metal product, the pad operating unit 10 for moving the pad 13, And an ink supply unit 20 for supplying ink to be transferred to the pad 13 and a jig operation unit 30 for fixing the to-be-printed object. Although not shown, the control unit is configured to instruct the operation of the entire printing press.

The pad 13 provided in the pad operating unit 10 transfers ink filled in the intaglio of the corroding plate 24 and retransfers it onto a to-be-printed object placed on the jig fixing table 31. Although the drawing shows an example in which four pads 13 are installed, the pads 13 are provided at equal intervals in the horizontal direction from one to six inside the side walls of the frame 11 so that all the pads are moved when the frame 11 is moved. (13) will move together at the same time. The upper part of each pad 13 is provided with the 1st air cylinder 131 for raising and lowering the pad 13 to an up-down direction.

On the inner upper part of the frame 11, a pad speed control valve 12 for adjusting the lifting speed at which each pad 13 is up / down, and a stroke length adjusting lever for adjusting the stroke distance for moving each pad 13 up and down. 121 are provided respectively. Each of the stroke adjustment levers 121 controls the downward stroke of the pad when the pad 13 transfers the ink filled in the intaglio of the corroding plate 24, and the pad 13 is buried in the pad 13 after printing. And a control lever for adjusting the down stroke of the pad when removing the ink from the cleaning tape, and an adjusting lever for adjusting the down stroke of the pad 13 when printing on the printed matter.

The frame 11 is moved forward and backward on the base plate 40 by the operation of the first servo motor 111. The base 11 is connected to the rotational axis of the first servo motor 111 and is moved forward and backward on the base plate 40. One ball screw 112 is installed, a pair of first LM guide 113 is fixedly installed on the base plate 40, the frame 11 along the first ball screw 112 and the first LM guide 113. ) Moves forward and backward on the base plate 40.

After printing, a cleaning tape is required to remove the ink on the pad 13, which is wound around the cleaning tape winder 14. The cleaning tape winder 14 is provided with first and second drums 141 and 142 on both sidewall portions of the frame 11 with pads 13 therebetween, and wound around the first drum 141. As the cleaning tape is driven by the induction motor 143, the second drum 142 rotates to move the cleaning tape from the first drum 141 to the second drum 142. The ink deposited on the pad 13 is removed after printing by lowering and contacting the cleaning tape.

The ink supply unit 20 automatically supplies the ink contained in the ink container 21 having a large capacity to the ink cup 23 provided for each pad 13, and between the ink container 21 and the ink cup 23. A pump is installed to pump ink. There are various types of pumps, and any pump may be used, but it is preferable to use a tubing pump 22 that is configured to supply a certain amount at regular intervals. Since the tubing pump 22 itself is not a technical feature of the present invention but is already commercialized, the detailed configuration and operation description of the tubing pump are omitted.

The ink supply hose 221 is connected to the ink cup 23 through the tubing pump 22 from the ink container 21, and the ink is supplied to the ink cup 23 through the ink supply hose 221 at predetermined intervals. Will be supplied. In addition, when a predetermined amount or more of the ink is stored in the ink cup 23, the surplus ink is configured to be discharged directly into the ink container 21 through the ink discharge hose 222. A controller (not designated) is installed on the side of the tubing pump 22 to control the ink supply cycle and supply amount and the ink amount to be stored in the ink cup 23. In addition, a mixer is mounted inside the ink container 21 to stir the ink to have a constant concentration.

The letters, pictures or logos to be printed are etched on the corroded plate 24 in an intaglio manner, and the corroded plate 24 is provided below the ink cup 23 so that the portions etched from the ink cup 23 The ink will be filled. Corroded plate 24 is moved forward and backward on the base plate 40 by the operation of the second air cylinder 25, as shown in Figure 6, the frame with the corroded plate 24 is advanced in the front (11) is moved so that the pad 13 advances directly above the etched portion of the corroded plate 24, and then the pad 13 is lowered to fill in the ink filled in the etched portion of the corroded plate 24. After transferring to 13), the corroding plate 24 is reversed to return to the original position of the lower portion of the ink cup 23.

The jig operation unit 30 is located in front of the pad operation unit 10, and has a jig fixing table 31 on which a printed matter is placed. The jig fixing table 31 is connected to the rotational shaft of the second servo motor 32 and has a second plate screw 33 installed in the left and right directions, and a base plate along the pair of second LM guides 34 installed in the left and right directions. 40) to move left and right.

A jig for fixing the to-be-printed body is installed on the upper part of the jig fixing table 31. After the to-be-printed object is produced by the injection machine, the robot moves the imprinted to-be-fixed paper to the jig, and then the corroded plate 24 After the pad 13 is retransferred and printed on the to-be-printed object, the frame 11 is raised to the original position while the pad 13 is raised. This printed object is taken out of the jig and moved to a predetermined place such as a conveyor (see FIG. 7).

If the to-be-printed object is thin, a part of the to-be-fixed material to the jig may be detached from the jig or the position thereof may be changed. Therefore, a vacuum pump (not shown) may be further installed at the lower part of the jig fixing table 31 to obtain a vacuum. It is desirable to adsorb the to-be-printed material so that the to-be-printed material is not separated from the jig on the jig fixing table 31 or the position thereof is changed.

The above description illustrates the present invention by way of example, and the embodiments disclosed in the specification are not intended to limit the technical spirit of the present invention, but to describe the present invention, so that those skilled in the art to which the present invention pertains can understand the present invention. Various modifications and variations will be possible without departing from the spirit of the technology. Therefore, the protection scope of the present invention is to be interpreted by the matter described in the claims, it should be interpreted that the technical matters within the scope equivalent to that included in the scope of the present invention.

10: pad operating unit 11: frame
111: first servo motor 112: first ball screw
113: First LM Guide
12: pad speed control valve 121: stroke distance control lever
13: pad 131: first air cylinder
14: cleaning tape winding machine 141: the first drum
142: second drum 143: motor
20: ink supply unit 21: ink container
22: tubing pump 221: ink supply hose
222: ink discharge hose 23: ink cup
24: corroded plate 25: second air cylinder
30: jig operation unit 31: jig fixing table
32: 2nd servo motor 33: 2nd ball screw
34: 2LM Guide
40: base plate

Claims (7)

In the pad printing machine that prints the pattern of the character, picture or logo by using the pad on the printed matter,
The printing press,
Pads which are installed at equal intervals inside both sidewalls of the frame for printing on the to-be-printed body to operate up and down independently of each other, Pad speed control valves provided for each pad to control the lifting speed of each pad, A stroke length adjusting lever for adjusting the stroke distance moving up and down is installed in the frame, and a cleaning tape winder is installed with a cleaning tape wound around to remove the ink on the pad after printing. The frame is operated by the operation of the first servo motor. A pad operating unit configured to move forward and backward on the base plate;
An ink supply unit which is automatically supplied with ink from the ink container to the ink cup, and has a corroded plate in which letters, pictures or logos are etched intaglio is installed under the ink cup so that the corroded plate moves forward and backward on the base plate;
A jig operating unit positioned in front of the pad operating unit, the jig operating unit having a jig fixing table on which a printed matter is placed and configured to move in a horizontal direction on a base plate;
It is configured to include, wherein the pad is moved in the vertical direction by the first air cylinder, the corroded plate is configured to move in the front-rear direction by the second air cylinder, the pad is ink filled in the intaglio of the corroded plate Is transferred to reprint the printed matter placed on the jig fixing table, and is printed.
The jig fixing table is connected to the rotary shaft of the second servo motor provided on the base plate and moved along the second ball screw installed in the left and right directions, and the pair of second LM guides installed in the left and right directions,
The frame is connected to the rotating shaft of the first servo motor and moved along a first ball screw installed in the front-rear direction and a pair of first LM guides installed in the front-rear direction,
The stroke adjusting lever may include an adjusting lever for adjusting the stroke stroke of the pad when the pad transfers ink filled in the intaglio of the corroded plate, and a drop of the pad when removing the ink on the pad from the cleaning tape after printing. And an adjustment lever for adjusting the stroke distance, and an adjustment lever for adjusting the stroke down distance of the pad when printing on the printed matter.
delete delete The method of claim 1,
A tubing pump is installed between the ink bottle and the ink cup, and a predetermined amount of ink is supplied from the ink bottle to the ink cup through the ink supply hose.
And a predetermined amount of ink stored in the ink cup is configured to discharge the surplus ink into the ink container through the ink discharge hose.
delete The method of claim 1,
A lower portion of the jig fixing table is further provided with a vacuum pump, so as to adsorb the to-be-printed by the vacuum so that the position is fixed to the jig on the jig fixing table.
The method of claim 1,
1 to 6 pads are installed at equal intervals in the left and right directions inside both sidewalls of the frame,
The cleaning tape winder is provided with drums on both side wall portions of the frame with pads therebetween, the cleaning tape is wound between both drums, and the cleaning tape moves while the drum rotates by driving the motor. Automatic pad printing machine.

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