JP4639375B2 - Screen plate cleaning device for screen printing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a screen plate cleaning apparatus in a screen printing machine for printing a printing paste such as a solder paste or an insulating paste through a screen plate having a pattern opening on a substrate such as a printed board, and more particularly to a screen. It is provided on the lower surface side of the plate so as to be movable, and in accordance with the movement, the residue of the printing paste attached to the inner surface of the pattern opening of the screen plate can be removed by suction from below the screen plate. The present invention relates to a screen plate cleaning device including the device main body.
[0002]
[Prior art]
As this type of device, a device body having a suction opening or a suction nozzle is connected to a suction device such as a vacuum pump provided outside the device body through a suction hose or duct, and the operation of the suction device is performed. It is known that the paste residue is sucked into the apparatus main body by the generated suction action and transferred through the suction hose or duct.
[0003]
[Problems to be solved by the invention]
In this type of screen plate cleaning device, the suction removal efficiency of the paste residue attached to the inner surface of the pattern opening of the screen plate is greatly influenced by the magnitude of the suction force acting on the suction nozzle. In the conventional screen plate cleaning apparatus as described above having a configuration in which the apparatus main body is connected to an intake device provided outside thereof via a suction hose or duct, the suction hose or duct (hereinafter referred to as the following) having a required length is used. And the various mounting parts and labor and time required for the installation thereof, and since the energy loss of the air flow due to the friction of the wall surface of the duct is unavoidable, AC motor with strong suction capability that can sufficiently cover the pressure loss due to possible air leakage Must use relatively large air intake device comprising the structure is complicated, inevitably costly.
[0004]
The present invention has been made to solve the above-described problems of the prior art, and is capable of sucking and removing the residue of the printing paste attached to the inner surface of the pattern opening of the screen plate very efficiently. It is a first object of the present invention to provide a screen plate cleaning apparatus in a screen printing apparatus that can be provided at a relatively simple and inexpensive structure.
[0005]
The second object of the present invention is to remove the residue of the printing paste attached to the inner surface of the pattern opening of the screen plate very efficiently and to remove the residue of the printing paste attached to the lower surface of the screen plate. It is another object of the present invention to provide a screen plate cleaning device in a screen printing machine, which can be provided with a relatively simple structure at a low cost.
[0006]
In order to achieve the first or second object of the present invention, a screen plate cleaning apparatus according to the present invention is a screen printing machine for printing a printing paste through a screen plate having pattern openings on a substrate. The screen plate cleaning apparatus in FIG. 1 is provided so as to be movable on the lower surface side of the screen plate, and as it moves, the residue of the printing paste attached to the inner surface of the pattern opening of the screen plate is removed by suction. In a device comprising a device main body configured to be able to, a horizontally long hollow housing in which the device main body accommodates and arranges a plurality of air intake devices, and detachably fixed to the hollow housing by a one-touch type locking mechanism , it consists suction nozzle having a single or plurality of air inlet which communicates with the inlet of the intake system, and the suction nozzle The apparatus main body is provided with sliding removal means that can move integrally with the screen plate so that the residue of the printing paste attached to the lower surface of the screen plate can be removed by sliding, and the suction nozzle extends along the axis of the hollow housing. And a hollow protrusion having an air inlet opening toward the lower surface of the screen plate, and a top portion of the hollow protrusion on which the sliding removal means for the residue attached to the lower surface of the screen plate can come into contact with the lower surface of the screen plate, It comprises a scraping edge portion formed on both front and rear sides of the top portion.
[0007]
In order to achieve the first or second object of the present invention, a screen plate cleaning device according to the present invention is a screen for printing a printing paste through a screen plate having pattern openings on a substrate. A screen plate cleaning device in a printing machine, which is provided movably on the lower surface side of the screen plate, and with the movement, a residue of a printing paste attached to the inner surface of the pattern opening of the screen plate In the apparatus having the apparatus main body configured to be able to be removed by suction, the apparatus main body is provided with a horizontally long hollow housing in which a plurality of intake devices are accommodated and the same number of through holes as the number of the intake devices. hollow and filter is interposed on the flat top plate of the housing detachably fixed by one-touch lock mechanism, and the suction port of the suction device before It consists suction nozzle having a single or a plurality of air inlet was communicated through holes, and moves integrally with the suction nozzle, sliding the residue of the printing paste PCB attached to the lower surface of the screen plate A hollow protrusion having an air inlet that is provided along the axis of the hollow housing and has an air inlet opening toward the lower surface of the screen plate; The residue sliding removal means attached to the lower surface of the screen plate includes a top portion of the hollow protrusion capable of coming into contact with the lower surface of the screen plate, and a scraping edge portion formed on both front and rear sides of the top portion. Screen plate cleaning device.
[0009]
For other structural features of the screen plate cleaning apparatus according to the present invention, refer to the description items of claims 3 to 6.
[0010]
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings which specifically show the embodiments thereof.
DETAILED DESCRIPTION OF THE INVENTION
[0011]
In the drawings, reference numeral 1 denotes a main body of a screen plate cleaning apparatus according to the present invention. The main body 1 moves up and down to the lower surface S1 side of the screen plate S set on a screen printing machine (not shown) through a screen holder. A solder alloy powder and a liquid flux which are provided so as to be movable back and forth in the front-rear direction and remain attached to the inner surface of the pattern opening S2 of the screen plate S along with the movement in the front-rear direction. A paste R for printing paste (hereinafter referred to as paste residue) R1 such as a solder paste made into a cream by kneading together is sucked and removed from below the lower surface S1 of the screen plate.
[0012]
In the present invention, the apparatus main body 1 includes a horizontally long hollow housing A in which a plurality of intake devices 2 are accommodated, and detachably fixed to the hollow housing A, and each intake port 2A of the intake device 2 In the example shown in the figure, an axial flow type small intake device 2 having an impeller directly connected to an output shaft of a small high-speed DC motor is provided. In the hollow housing A, the suction port 2A is erected along the axis thereof with the suction port 2A facing up and the discharge port 2B facing down, and the suction nozzle B is the number of the suction devices 2 On the flat top plate 5 of the hollow housing A in which the same number of three circular through holes 4 are formed at positions directly above the intake devices, a flat sheet-like shape for collecting the paste residue R1 removed by suction is collected. Lock mechanism C, which will be described later, with the filter 6 interposed It is more detachably exchanged freely fixed. In addition, each suction port 2 </ b> A of the intake device 2 is opened in each through hole 4 of the top plate 5. Furthermore, the electric motor is configured to be capable of two-speed shifting, and an externally connected controller can change the rotational speed as necessary to adjust the suction air volume of each intake device, and hence the suction force. It has been made possible.
[0013]
In the illustrated example, the hollow housing A is formed in a rectangular shape, and the front wall A1, the rear wall A2, the left and right side walls A3, A4 are respectively provided with horizontally long window holes 7 as ventilation holes. At the same time, the bottom wall A5 is formed with a large number of exhaust ports 8 for discharging the hot air discharged from the discharge ports 2B of the intake device 2, so that each of the intake devices can be operated during operation. An excessive temperature rise can be prevented. Reference numeral 9 denotes a partition wall vertically provided between the intake devices 2 in the hollow housing A, and is provided to block mutual interference or amplification such as generated heat and rotation control. Reference symbol P denotes a packing filled in a gap between the shoulder portion of the casing of each intake device 2 and the top plate 5.
[0014]
In the illustrated example, the intake nozzle B extends along the axis of the hollow housing A, and communicates with a single elongated slit-like intake port 3 that opens toward the screen plate lower surface S1. It comprises a horizontally long hollow projection 11 having a hollow suction portion 10 that is attached to the top plate 5 of the hollow housing A through a rectangular mounting plate 12 fixed to the bottom surface thereof.
[0015]
The apparatus main body 1 is provided with sliding removal means that moves integrally with the intake nozzle B so that the paste residue R2 attached to the screen plate lower surface S1 can be removed by sliding. The sliding removal means includes a flat top portion 11A of the hollow projection 11 that can slide in contact with the screen plate lower surface S1, and scraped edge portions 11B and 11C formed on both front and rear sides of the top portion 11A. When sliding in a state of being in contact with the screen plate lower surface S1, the paste residue R2 attached to the lower surface of the screen plate can be removed by scraping along with the sliding. It is configured.
[0016]
1 to 4, the locking mechanism C described above is formed in the central portion near the end portions of the attachment plate 12 of the suction nozzle B, the filter 6 and the top plate 5 of the hollow housing A, respectively. In the state where the filter 6 and the mounting plate 12 are sequentially superimposed on the top plate 5 in the mounting holes 13, 14, 15, a head screw 16 inserted from above and the mounting holes 13, 14, 15, respectively. And a locking means 17 for releasably locking the screw 16 inserted through the top plate 5 below the central portion of each end portion of the top plate 5. Each locking means 17 includes a planar rectangular frame 18 fixed to the lower surface of the central portion at each end of the top plate 5, a ring 20 formed with a radial arc-shaped cutout groove 19, and a threaded portion at one end. A pair of rods 22, each having a pair 21, and a sliding member 24 in which an engagement piece 23 having an arcuate engagement recess 23A is fixed between the other end portions, two coil springs 25, a handle 26 and two nuts 27, and a pair of rods 22 and 22 of the sliding member 24 are inserted into a pair of through holes 18A and 18A provided horizontally in the frame 18, The engaging piece 23 of the sliding member 24 is inserted into a U-shaped sliding groove 18B formed horizontally from about the half of the frame 18 from the side through which the rod is inserted, and the engaging piece is attached to the frame. Sliding in the notch groove 19 of the ring 20 fitted in the body 18 After the insertion, the ends of the rods 22 and 22 on which the screws 21 are formed are projected outwardly through a pair of small diameter openings 30 and 30 formed in the side walls A3 and A4 of the hollow housing A, The coil springs 25 are respectively compressed on the projecting portions, the handle 26 is fixed, and the nuts 27 are screwed into the threaded portions 21 of the rods 22 for assembly.
[0017]
When the locking means 17 is assembled as described above, the sliding member 24 is biased outward by the two coil springs 25. In this state, the engaging piece 23 of the sliding member 24 is displaced. As shown in FIG. 4, the projection extends inside the rectangular frame 18 and projects into the circular hole 20 ′ of the ring 20 while being fitted in the notch groove 19 of the ring 20. . In this state, when the suction nozzle B is attached to the hollow housing A, the head screw 16 is placed in the state in which the filter 6 and the attachment plate 12 of the suction nozzle B are sequentially stacked on the top plate 5 of the housing. 14 and 15, and the handle 26 is pushed to slide the sliding member 24 inwardly against the elasticity of the spring 25, so that the central axis of the head screw 16 and the central axis of the ring 20 are substantially coincided with each other. In this state, it engages with the thread groove of the threaded portion 16 ′ of the head screw 16 and locks the head screw 16, so that the suction nozzle B is fixed to the hollow housing A very easily. A plurality of retaining pins 28 are formed in the lower surface of the mounting plate 12 of the suction nozzle B, while small holes 29 for press-fitting the retaining pins 28 are formed in the filter 6 and the top plate 5 of the hollow housing A. When the suction nozzle B is attached to the hollow housing A, the filter is deformed by the suction force acting on the filter 6 during suction by pressing the retaining pins 28 into the small holes 29 respectively. The filter 6 can be firmly pressure-bonded between the top plate 5 and the mounting plate 12 so that no air leakage occurs due to displacement.
[0018]
In order to remove the intake nozzle B fixed to the hollow housing A as described above, the handle 26 is pushed and the sliding member 24 is slid inward against the elasticity of the spring 25. Since the joining piece 23 is released from the screw groove of the head screw 16 and the locking thereof is released, it is only necessary to pull out the head screw 16 upward, whereby the intake nozzle B can be removed very easily. .
[0019]
The screen plate cleaning device configured as described above is operated after the screen printing process is completed, and activates the three intake devices 2 described above, and the top portion 11A of the intake nozzle B is connected to the lower surface of the screen plate S. When the apparatus main body 1 is moved in the direction of arrow X in FIG. 5, that is, forwardly in the state of being in contact with S 1, it is generated by the operation of the entire intake apparatus when passing under the opening S 2 of the screen plate S. Paste residue R2 attached to the inner surface of the opening S2 with a strong suction force is sucked and removed from the suction port 3 of the suction nozzle B into the hollow suction portion 10 and removed, and the suction port 2A of the suction device The paste residue R1 attached to the screen plate lower surface S1 is collected by the filter 6 located in the vicinity of the front surface of the suction nozzle B as the apparatus body 1 slides. It is very efficiently removed by stripped-up edge portion 11B. In this case, the suction nozzle B can be adjusted by appropriately shifting the rotation of each motor of the suction device 2 in accordance with the arrangement state of the pattern openings S2 of the screen plate S, the size thereof, the nature of the paste residue R2, the hardness, etc. The acting suction force or the suction flow velocity flowing through the intake port 3 can be adjusted appropriately.
[0020]
FIG. 6 shows how the paste residues R2 and R1 are removed when the apparatus main body 1 is moved in the direction of the arrow Y, that is, rearward, and the contents and modes of the operation are the same as those described above. Therefore, the explanation is omitted.
[0021]
Although the illustrated suction nozzle B is shown as having a single elongated slit-like intake port 3, the suction nozzle B may be provided with a plurality of intake ports having such a shape or different shapes. Well, if you standardize the shape and dimensions of the mounting plate 12 for mounting it on the hollow housing A and prepare several kinds of them, compatibility will be given, so you can choose the desired one from those It becomes possible to select and use one. In this case, the lock mechanism C described above is a kind of so-called one-touch type lock mechanism that is extremely easy to operate as described above. Therefore, if this is used, the suction nozzle B and the filter 6 that are easily soiled by the suction of paste residue are used. Not only is it extremely convenient for cleaning and replacement, but it is also very convenient for the selective replacement work of a suction nozzle that is provided with compatibility.
[0022]
Although the present invention has been described in detail with reference to the drawings that specifically show one embodiment thereof, the present invention is not limited to the illustrated embodiment and is within the scope of the claims. These can be implemented with various modifications.
[0023]
Thus, according to the present invention, the residue of the printing paste attached to the inner surface of the pattern opening of the screen plate can be removed by suction very efficiently, and the work efficiency and printing accuracy in screen printing are remarkably high. It is possible to obtain a screen plate cleaning device that can be provided at a relatively low cost with a structure that can contribute to improvement.
Further, according to the present invention, the residue of the printing paste attached to the inner surface of the pattern opening of the screen plate can be absorbed and removed very efficiently, and the residue of the printing paste attached to the lower surface of the screen plate It is possible to obtain a cleaning device capable of providing a relatively simple and inexpensive structure that can significantly improve the efficiency of screen printing and the printing accuracy. .
[Brief description of the drawings]
FIG. 1 is a longitudinal front view of a screen plate cleaning apparatus body as an example of an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the apparatus main body shown in FIG.
FIG. 3 is an exploded perspective view of a lock mechanism used for detachably fixing a suction nozzle to a hollow housing.
FIG. 4 is another exploded perspective view of the locking mechanism.
FIG. 5 is a partially longitudinal side view showing the operation of the device of the present invention.
FIG. 6 is another partially longitudinal side view showing the operation of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Apparatus main body A Hollow housing B Suction nozzle 2 Intake apparatus 2A Intake apparatus inlet 3 Intake nozzle inlet S Screen plate R1 Paste residue R2 attached to inner surface of screen plate opening R2 Paste attached to lower surface of screen plate Residue 4 Through hole 5 Top plate 6 Filter 7 Window hole A5 Bottom wall 8 Exhaust port 11 Hollow protrusion 11B Cutting edge portion 11C Cutting edge portion

Claims (6)

A screen plate cleaning device in a screen printing machine for printing a printing paste through a screen plate having a pattern opening on a substrate to be printed, which is movably provided on the lower surface side of the screen plate, and with the movement And an apparatus main body configured to suck and remove the residue of the printing paste attached to the inner surface of the pattern opening of the screen plate, wherein the apparatus main body accommodates a plurality of intake devices. A horizontally long hollow housing, and a suction nozzle having a single or a plurality of air inlets that are detachably fixed to the hollow housing by a one-touch type locking mechanism and communicated with each air inlet of the air intake device. it, and the move to the suction nozzle integrally, a residue of the printing paste PCB attached to the lower surface of said screen plate so as to slide removed The apparatus body is provided with a sliding removal means, and the suction nozzle extends along the axis of the hollow housing and has an air inlet opening toward the lower surface of the screen plate, and is attached to the lower surface of the screen plate. A screen plate cleaning apparatus, wherein the residue sliding removal means includes a top portion of the hollow projection capable of coming into contact with the lower surface of the screen plate and a scraping edge portion formed on both front and rear sides of the top portion. A screen plate cleaning device in a screen printing machine for printing a printing paste through a screen plate having a pattern opening on a substrate to be printed, which is movably provided on the lower surface side of the screen plate, and with the movement And an apparatus main body configured to suck and remove the residue of the printing paste attached to the inner surface of the pattern opening of the screen plate, wherein the apparatus main body accommodates a plurality of intake devices. A horizontally long hollow housing, and a flat top plate of the hollow housing having the same number of through holes as the number of the air intake devices, and a filter placed on the flat top plate so as to be detachable and fixed by a one-touch type locking mechanism. it consists suction nozzle having a single or a plurality of air inlet was communicated through each inlet of the device and the through hole, and the suction Bruno The apparatus main body is provided with sliding removal means that moves integrally with the screen and can remove the residue of the printing paste attached to the lower surface of the screen plate, and the suction nozzle is provided on the axis of the hollow housing. And a hollow protrusion having an air inlet opening toward the lower surface of the screen plate, and a top portion of the hollow protrusion on which the slide removing means for removing the residue attached to the lower surface of the screen plate can come into contact with the lower surface of the screen plate And a screen plate cleaning device comprising a scraping edge portion formed on both front and rear sides of the top portion. The hollow housing is formed in a rectangular shape, and at least both of its front and rear walls have horizontally long window holes as vent holes, and its bottom wall has a large number of air discharged from each discharge port of the intake device. screen plate cleaning device according to claim 1 or 2 of the exhaust port, characterized in that it is formed, respectively. The one-touch type lock mechanism includes a filter on the top plate in a plurality of mounting holes respectively drilled in a central portion near each end of the top plate of the suction nozzle and the mounting plate of the suction nozzle. In the state where the mounting plates are sequentially stacked, the head screws inserted from the information and the head screws inserted through the mounting holes are releasably locked below the central portion of each end of the top plate. The screen plate cleaning device according to claim 1, wherein the screen plate cleaning device is a locking means. Each of the locking means has a flat rectangular frame fixed to the lower surface of the central portion of each end of the top plate, a ring formed with a radial arc-shaped cutout groove, and a threaded portion at one end. A pair of rods, a sliding member formed by fixing an engagement piece having an arcuate engagement recess between the other end portions of the rod, two coil springs, a handle, and two nuts An assembly comprising:
  The pair of rods of the sliding member are inserted into a pair of through-holes provided horizontally in the frame body, and a U-shaped sliding formed horizontally across the half of the frame body from the side through which the rod is inserted. The screw is formed after the engagement piece of the sliding member is inserted into the groove, and the engagement piece is slidably inserted into the cutout groove of the ring fitted in the frame. The end of the rod is protruded outward through a pair of small-diameter openings formed on each side wall of the hollow housing, the coil springs are respectively mounted on the protruding portions, the handle is fixed, and the The screen plate cleaning apparatus according to any one of claims 1 to 4, wherein the nut is screwed into the thread portion of the rod. Screen plate cleaning device according to any one of claims 1 to 5, characterized in that the printing paste is a solder alloy powder and a liquid flux and solder paste were creamed by kneading a.

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