KR20030051583A - Screen printer for automatic print system - Google Patents

Abstract

PURPOSE: A screen printer for an automatic print system is provided to achieve a superior printing quality by spraying ink in a state that a screen mask is closely adjacent to a workpiece as possible. CONSTITUTION: A slit(21) is formed at a side of a frame(30) installed in a mounting table(20) for guiding an up-down movement of the frame(30). The frame(30) is coupled to a power transmission unit in such a manner that the frame(30) is lifted up and down. A power generating unit(62) is coupled to one side of the mounting table(20). The power generating unit(62) is coupled to the power transmission unit in order to generate lifting power. The power transmission unit has a coupling protrusion formed at a side of the mounting table(20) through the slit(21) and a screw shaft(63) rotatably installed in the mounting table(20).

Description

Screen printing device for automatic printing device {Screen printer for automatic print system}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen printing apparatus, and in particular, proposes a dedicated configuration for performing an automated printing process to improve the productivity of a print work and obtain a better printing state, and to move a means for supplying ink. The present invention relates to a screen printing apparatus for an automated printing apparatus, which simplifies the construction, shortens the production time and lowers the manufacturing cost.

Screen printing includes an object to be printed (hereinafter referred to as a work piece) under a screen mask in which a desired pattern or logo penetrates and a printing hole is formed, and ink sprayed by spraying ink from the upper side of the screen mask passes through the printing hole of the screen. By doing so, the desired pattern or logo is printed on the surface of the workpiece.

As a configuration for performing such screen printing, in the related art, each component for performing printing is provided with a mounting table installed therein, a jig installed at a lower part of the mounting table on which a workpiece is mounted, and ink from the upper part of the jig to the workpiece. It is accompanied by a screen mask which is provided between the ink supply mechanism for ejecting and the jig and the ink supply mechanism and the jig to be applied to the workpiece in the form of a desired pattern, logo, etc. through the printer.

Here, in the printing operation, since a pattern or a logo is generally formed over a predetermined area, the supply of ink must be ejected by moving in one direction on the screen mask, so that the ink supply mechanism moves the nozzle in which the ink is ejected in one direction (front After, the left, and the right, it will include a drive mechanism for moving in any one direction, hereinafter, described as horizontal movement.

In addition, the configuration for horizontal movement of the ink supply mechanism has been adopted by adopting a device for converting the rotational power of the motor from the cam or the linear reciprocating mechanism to the linear reciprocating drive using the power source as the motor.

In the printing apparatus configured as described above, when a worker mounts a workpiece on a jig, the driving mechanism of the ink supply mechanism is driven so that the nozzle is horizontally moved on the screen mask and sprays ink to perform printing.

The conventional screen printing apparatus described above is for performing printing in a state in which a workpiece is fixed on a jig, and an automatic printing apparatus, that is, a large number of workpieces are mounted on a plurality of jigs, respectively, and transferred by a transfer mechanism. And there is a structural problem to apply to the printing device.

The problem is that in order to obtain a better printing state, the ink is ejected by bringing the screen mask as close to the workpiece as possible, so that the ejected ink remains in the printing hole of the screen mask while sticking to the surface of the workpiece. As the jig proceeds in the state, the ink inside the printer may spread on the workpiece, causing a printing failure.

The problem described above can be solved only after the screen mask itself is lifted upward before the jig proceeds in the state where the ink adheres to the surface of the workpiece, but the existing screen printing apparatus can raise / lower the screen mask in this way. The configuration is not applied.

Therefore, in the printing apparatus as described above, the printing work for one work cannot be performed by the operator's manual work, and in order to perform the automated printing, the ink must work between the screen mask and the work. After sticking to the surface of water to maintain a wide interval so as not to remain in the printer to maintain the print clarity and the correct printing state of the desired form, there is a problem that the operation reliability is lowered.

In addition, the cam or the linear reciprocating mechanism (usually the link mechanism) is complicated in structure with the cam or various mechanisms for fixing the various link mechanisms in place, thereby increasing the working time delay and manufacturing cost, etc. Will cause time and economic problems.

The present invention has been made to solve the above problems, the lifting mechanism portion to allow the ink is ejected in the state that the screen mask as close as possible to the workpiece, and the screen mask is driven up before the jig proceeds after the ink injection. It is an object of the present invention to provide a screen printing apparatus capable of obtaining a better printing state.

Another object of the present invention is to provide a screen printing apparatus which is configured to simply configure the configuration for the ink supply mechanism to move horizontally to shorten the working time and lower the manufacturing cost.

1 is a front view of an automated printing apparatus.

2 is a plan view of the printing apparatus of FIG.

3 is a perspective view of a screen printing apparatus according to the present invention.

4 is a front view of the printing apparatus of FIG.

FIG. 5 is a side cross-sectional view of a portion of the printing apparatus of FIG. 4;

6 is an exemplary view illustrating a driving state of the screen printing apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: screen printing apparatus 20: mounting table

21: Slit 30: Frame

31: screen mask 32: engaging projection

40: horizontal moving mechanism 41: slide block

42: screw shaft 43: motor

50: ink supply mechanism 60: lift drive mechanism

61: power transmission mechanism 62: motor

63: screw shaft

In order to achieve the above object, the present invention has the following features.

The present invention is provided with a mounting table on one side of the jig on which the workpiece is mounted on the work table, a frame coupled to the lower end of the screen mask provided on the upper side of the jig is mounted on one side of the mounting table, In the screen printing apparatus comprising an ink supply mechanism for supplying ink and a horizontal movement mechanism coupled to the ink supply mechanism to enable horizontal movement, the screen printing apparatus comprising:

A slit is formed on the frame side of the mounting table to guide the lifting and lowering of the frame, and the frame is installed inside the mounting table through the slit to be liftable and coupled to the power transmission mechanism for lifting the frame, and coupled with the power transmission mechanism for lifting. The power generating mechanism for generating power is characterized in that it comprises a lift drive unit configured to be coupled to one side of the mounting.

According to the above configuration, the present invention enables the screen printing apparatus to be applied to an automated printing apparatus, and a better printing state can be obtained.

In order to achieve the above another object, the present invention, the horizontal movement mechanism, the left and right movement in the frame is coupled, the slide block is coupled to the ink supply mechanism; A screw shaft having both ends rotatably coupled to both sides of the frame, screwed to the slide block, and penetrated to transmit a moving force to the slide block; Installed in the frame and coupled to the screw shaft is characterized in that consisting of a power generating mechanism for generating a power to rotate the screw shaft.

By the above configuration, the present invention, the configuration of the horizontal moving mechanism can be simplified to shorten the manufacturing time of the mechanism and to reduce the manufacturing cost.

Hereinafter, embodiments of the printing apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view of an automated printing apparatus to which the screen printing apparatus according to the present invention is applied, and FIG. 2 is a plan view of the automated printing apparatus of FIG.

1 and 2 illustrate the patent application No. 2003-0037419 ("mobile phone front cover printing apparatus") filed by the present applicant on June 11, 2003.

Referring to the drawings, the automated printing apparatus 1 has a trajectory portion 5 formed with a plurality of jigs 4 arranged on a work table 3 having a supply / discharge point 2 on one side. On one side on the locus line of the transfer mechanism part 5, the printing work part 6 and the drying mechanism part 7 are respectively provided.

Such an automated printing apparatus 1 illustrates the front cover of the mobile phone as the workpiece O.

In the automated printing apparatus 1, the work O is mounted on the jig 4 by a separate supply means (not shown) at the supply / discharge point 2, and the jig is driven by the transfer mechanism part 5. (4) is moved so that the work piece O is transferred to the print job position.

Here, the print operation unit 6 is divided into a pad printing apparatus 8 and a screen printing apparatus 10, wherein the pad printing apparatus 8 is a patent application No. 2001-70367 that has already been filed by the present applicant. Arc ("printing apparatus of the printing automation device"), which means that when the workpiece O is transported to the working point of the pad printing apparatus 8, the pad on which the desired pattern and logo is transferred is lowered and the workpiece ( Performing printing in O) is as well known.

Figure 3 is a perspective view showing the appearance of the screen printing apparatus according to the present invention, Figure 4 is a front view of the printing apparatus of Figure 3, Figure 5 is a side cross-sectional view of the mounting portion of the printing apparatus of Figure 4 cut away.

Referring to the drawings, the screen printing apparatus 10 according to the present invention is a basic configuration consisting of the mounting table 20, the frame 30 having the screen mask 31, the horizontal moving mechanism 40, the ink supply mechanism 50 Has

The mounting table 20 is installed on the work table 3 on one side of the line on which the jig 4 is moved along the trajectory, and a slit 21 having a lengthwise up and down direction is formed to couple the frame 30 to one side. do.

Lifting mechanism 60 for lifting the frame 30 is installed on the mounting table 20, the lifting drive mechanism 60 is coupled to the frame 30 through the slit 21 to lift the frame 30 It is composed of a power transmission mechanism 61 for transmitting power, and a motor 62 which is installed on the upper side of the mounting table 20 and coupled to the power transmission mechanism 61 to generate the lifting power of the frame 30. .

The power transmission mechanism 61 is coupled to the engaging projection 32 protruding to penetrate the slit 21 at the side of the mounting table 20 of the frame 30, and the slit of the mounting table 20 is coupled with the motor 62 21) is provided up and down by the longitudinal direction of the slit 21 in the inner side so that both ends thereof are rotatably supported by the mounting table 20 and protrude inwardly through the slit 21 up and down. It consists of a screw shaft 63 penetrated and screwed.

The coupling protrusion 32 and the screw shaft 63 are coupled to the screw shaft 63 to form a precise thread and groove to provide the precision of the driving, but more preferably, the ball screw having excellent driving precision and coupling force. The configuration is adopted.

The horizontal moving mechanism 40 is a slide block 41 slidably coupled to the left and right in the frame 30, and a screw shaft for penetrating horizontally and screwed to the slide block 41 to transmit the slide movement force ( 42 and a motor 43 that is mounted on one side of the frame 30 and coupled to the screw shaft 42 to rotate the screw shaft 42.

Here, the slide block 41 is provided with a guide mechanism 44 for guiding the left and right slide section between the frame 30, the guide mechanism 44 is a frame ( The guide protrusions 45 are formed on the lower surface of the frame 30 and the guide grooves 46 are formed on the surface of the frame 30 corresponding thereto.

In addition, the combination of the screw shaft 42 and the slide block 41 is preferably adapted to adopt the configuration of the ball screw as in the power transmission mechanism described above.

The ink supply mechanism 50 includes an intermittent mechanism 51 for intermittently supplying ink to intermittently eject ink supplied by an external pump or the like, and a jet outlet when ink is supplied through the intermittent mechanism 51. It consists of an ink nozzle 52, which is already assembled and adopts a well-known configuration.

Here, it is obvious that a screen mask 31 having a printing hole formed in the form of a pattern, a logo, or the like should be positioned below the ink nozzle 52. In this embodiment, the screen mask 31 is a frame 30. Is coupled to the lower end of the jig (4) is to be located in the vertical above the line going.

In the figure, reference numeral 64 denotes a power transmission member such as a gear, in which a motor 62 is coupled to each rotation shaft to transmit the power to rotate the screw shaft 63.

6A to 6B are exemplary views showing a printing process of the screen printing apparatus according to the present invention.

When the workpiece O is transferred to the working position by the movement of the jig 4 in the initial state as in FIG. 6A, the lifting drive mechanism 60 is driven to lower the screen mask 31 as in FIG. 6B. And close to the upper surface of the workpiece (O).

At this time, when the motor 62 of the elevating driving mechanism 60 is rotated, the screen mask 31 rotates the screw shaft 63 coupled with the motor 62, and the frame is rotated by the screw shaft 63. The coupling protrusion 32 of the 30 is lowered along the screw line of the screw shaft 63 so that the screen mask 31 coupled with the frame 30 is lowered.

When the screen mask 31 is in close proximity to the workpiece O as described above, the horizontal moving mechanism 40 is operated to horizontally move the ink supply mechanism 50 as shown in FIG. 6C and spray ink from the ink supply mechanism 50. Printing is performed on the workpiece O through the screen mask 31.

At this time, the ink supply mechanism 50 is horizontally moved as the screw shaft 42 is rotated by the rotation of the motor 43 of the horizontal movement mechanism 40 and the slide block 41 is moved. The supply mechanism 50 is to lower the ink nozzle 52 by the intermittent mechanism 51 so that the ink is injected through the ink nozzle 52.

Here, the lowering or raising of the ink nozzle 52 by the intermittent mechanism 51 is driven to eject the ink, and the ink supply mechanism 50 comprising the intermittent mechanism 51 and the ink nozzle 52 is Since it is a well-known technical matter, detailed description is abbreviate | omitted.

When the process as shown in FIG. 6C is performed, the ink remains adhered to the surface of the workpiece O through the printing hole 33 of the screen mask 32, as shown in the drawing. Then, the jig 4 ), The lifting drive mechanism 60 is driven to prevent the ink remaining in the printing hole 33 from spreading on the surface of the workpiece O, and the upper side of the frame 30 as shown in FIG. 6D. Will be elevated.

The rise of the frame 30 is a process of elevating the screen mask 31, which is left in the printing hole 33 of the screen mask 31 by performing the process (specifically, ink adheres to the surface of the workpiece). The upper part is separated from the ink present in the printer.

In addition, the operation of raising the frame 30 is performed by the screw 62 of the screw shaft 63 as the engaging projection 32 rotates as the motor 62 of the lifting drive mechanism 60 rotates the screw shaft 63. After this, the slide block 41 is rotated by the rotation of the screw shaft 42 coupled with the motor 43 when the motor 43 of the horizontal moving mechanism 40 is rotated. Return to the initial position.

When the printing and ink supply mechanism 50 described above is returned to its original position, the jig 4 on which the finished work O is mounted proceeds, and the jig 4 on which the next work O is mounted proceeds. It is moved to the print job position and the continuous printing process is performed as the above process is performed again.

As described above, the present invention allows the screen mask to be lifted up and down after the jet of ink is completed and before the jig proceeds, thereby eliminating the bleeding of the ink due to the progress of the jig, and thus the screen mask. By allowing the distance between the workpiece and the workpiece to be closer to each other, a better printing state (exact form printing and high print sharpness, etc.) can be obtained.

In addition, the present invention has the effect of reducing the time and manufacturing cost when manufactured by simply configuring the configuration for transferring the ink supply mechanism by a mechanism such as a screw shaft and a motor to obtain a time and economic benefit.

Claims (3)

The mounting table 20 is provided on one side of the jig 4 on which the workpiece O is mounted on the work table 2, and the screen mask 31 provided above the progress line of the jig 4 is provided at the lower end thereof. The combined frame 30 is mounted on one side of the mounting table 20, and the ink supply mechanism 50 for supplying ink from the upper portion of the screen mask 31 and the ink supply mechanism 50 are combined to allow horizontal movement. In the screen printing apparatus comprising a horizontal moving mechanism 40 is installed in the frame 30, A slit 21 for guiding the lifting and lowering of the frame 30 is formed on the side of the frame 30 of the mounting table 20, and the frame 30 is installed inside the mounting table 20 through the slit 21 to be framed. Is coupled to the elevating power transmission mechanism 61 for elevating (30), the power generating mechanism 62 is coupled to one side of the mounting table 20 is coupled to the power transmission mechanism 61 to generate the lifting power Screen printing apparatus for an automated printing device comprising a lift drive mechanism (60) configured. The method of claim 1, wherein the power transmission device 61 A coupling protrusion 32 formed through the slit 21 of the mounting table 20 at the side of the mounting table 20 of the frame 30; The screw shaft through which the coupling protrusion 32 is rotatably mounted inside the mounting table 20 and is rotated by receiving the power of the power generating mechanism 62 to move the frame 30 up and down. Screen printing apparatus for an automated printing apparatus, characterized in that consisting of 63). The method of claim 1, wherein the horizontal movement mechanism 40 A slide block 41 coupled to the frame 30 so as to be movable left and right, and to which the ink supply mechanism 50 is coupled; Both ends of the frame (30) rotatably coupled to each other, screwed to the slide block (41) and penetrates through the screw shaft (42) for transmitting a moving force to the slide block (41); And a power generating mechanism (43) installed on the frame (30) and coupled with the screw shaft (42) to generate power for rotating the screw shaft (42).