JPH0810844A - Marking device - Google Patents

Abstract

PURPOSE:To remove a powder coating material at a specified width with good accuracy, to improve cutting accuracy of a coated steel sheet, etc., and to shorten working stages by injecting a high-pressure gas from the lower part of an outer hood toward the surface to be coated to suspend the powder coating material and removing the material by sucking, then, subjecting the surface to be coated to marking. CONSTITUTION:The powder coating material applied on the surface to be coated is suspended by a device for injecting the high-pressure gas toward the surface to be coated from the lower part of the outer hood 1 having a cylindrical shape. The suspending powder coating material is sucked away by a vacuum pump from a suction port 4 disposed within the outer hood 1 and the surface to be coated is subjected to marking by a masking jig 3 disposed in the central part of the outer hood 1. Then, the powder coating material suspended by injection of the high-pressure gas is sucked into the outer hood right after the suspension and is removed with the good accuracy at the specified width even with intricate curves without splashing to the ambient. The marking at the center of the width where the powder coating material is removed is executed by arranging a marking device 3 in the central part of the outer hood 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marking device applied to, for example, steel plates coated with powder coating for ships, bridges, buildings, electric boards, automobiles and the like.

[0002]

2. Description of the Related Art Conventionally, when a coated steel sheet coated with powder coating material such as ships, bridges, buildings, electric boards, and automobiles is melt-cut, it is not necessary to coat the powder coating material when electrostatically attached to the steel sheet. The part is excluded by marking it with paper or tape beforehand and masking it, and marking the cutting line in the unpainted state. In addition, marking is performed in a separate process using a dedicated marking device. If the powder paint is applied and marked and melted, the paint will melt and remain in a dirty state, so it is necessary to remove the dirty part and repaint the paint. It is necessary to keep it.

[0003]

SUMMARY OF THE INVENTION As described above, conventionally,
When fusing a coated steel sheet with powder paint, the powder paint is excluded in advance and the cutting line is marked in an unpainted state. In addition, marking is performed in a separate process using a dedicated marking device, and it is not possible to remove powder coating material and perform marking at the same time with the same device.

[0004]

The marking device according to the present invention is intended to solve the above-mentioned problems, and the high pressure gas is jetted from the lower portion of the outer hood having a cylindrical shape toward the plate surface to be coated. Means for floating the powder coating applied to the surface, means for sucking and removing the floating powder coating provided inside the outer hood, and the plate surface to be coated provided at the center of the outer hood And a means for marking on.

Further, in the marking device according to the present invention, high-pressure gas is jetted from the inside of the outer hood having a cylindrical shape toward the plate surface to be coated, and the powder coating material applied to the plate surface to be coated is suspended. The present invention is characterized in that it is provided with means for eliminating floating powder coating material, and means for marking the plate surface to be coated, which is provided in the central portion of the outer hood.

[0006]

That is, in the marking apparatus according to the present invention, the powder coating material applied to the surface of the plate to be coated is suspended by the device for injecting high-pressure gas from the lower portion of the outer hood having a cylindrical shape toward the surface of the plate to be coated. The floating powder coating is sucked and removed by the device installed inside the outer hood, and the surface of the coated plate is marked by the device installed in the center of the outer hood. By spraying, the floating powder coating material can be accurately removed with a constant width even in a complicated curve without being sucked into the outer hood immediately after the floating and scattered to the surroundings. Also,
By arranging a marking device in the central part of the outer hood, it is possible to mark the center of the removal width.

Further, in the marking device according to the present invention, the powder coating material applied to the surface of the plate to be coated is suspended by a device for injecting high-pressure gas from the inside of the cylindrical outer hood toward the surface of the plate to be coated. It removes the floating powder coating and marks it on the surface of the plate to be coated by a device installed in the center of the outer hood.By spraying high pressure gas, the floating powder coating is suspended. Immediately after that, even a complicated curve can be accurately removed with a constant width without being removed from the inside of the outer hood and scattered to the surroundings. Further, by arranging a marking device in the central portion of the outer hood, it is possible to mark the center of the removal width.

[0008]

1 and 2 are explanatory views of a marking device according to an embodiment of the present invention, and FIG. 3 is an explanatory view of a marking device according to another embodiment of the present invention. 1 and 2, the marking device according to the present embodiment is used, for example, for a coated steel sheet coated with powder coating material for ships, bridges, constructions, electric boards, automobiles, etc. In the case of fusing, a portion of the powder coating 13 which is electrostatically attached to the steel plate and does not need to be coated is sucked by the vacuum pump 10 while being blown off by the air pump 7, and then the cutting line is marked in the unpainted state. . If the powder coating material 13 is marked with the powder coating applied and melted, the coating material melts and remains in a dirty state. Therefore, it is necessary to remove the soiled portion and recoat the coating material. It is necessary for work to remove it in advance.

That is, reference numeral 1 in the drawing is a cylindrical outer hood, which is attached to and supported by a moving device (not shown). 2a is an air outlet and an outer hood 1
A plurality of them are provided along the entire circumference of the lower surface. The air outlet 2a may be formed in a slit shape. 2 is a high pressure air conduit. A marking jig 3 is installed at the center of the cylinder of the outer hood 1, and discharges downward to mark the steel plate. The marking jig 3 may be other marking means such as a mechanical type other than the discharge type and a coating liquid type. Reference numeral 4 is a suction port for the powder 13 and is formed in a cylindrical shape inside the air outlet 2a.
Are collected from below to above. A high-pressure air hose 5 supplies high-pressure air to the air outlet 2a. A switching valve 6 controls high-pressure air to supply and stop it. Reference numeral 7 denotes an air pump, which blows high-pressure air through the switching valve 6 and the hose 5 to the outlet 2
Pump to. A vacuum hose 8 is connected to the suction port 4. A switching valve 9 controls the opening and closing of the vacuum line. A vacuum pump 10 supplies a suction force by a vacuum action to the suction port 4 via the switching valve 9 and the vacuum hose 8. A cable 11 supplies a current to the marking jig 3 and is connected to a marking power transmission device (not shown). Reference numeral 12 is a steel plate, on the top surface of which powder coating 13 for rust prevention is applied and adhered by static electricity.

When marking the steel plate 12 using the marking device, the marking device is attached to an arm of a moving device (not shown) and placed on the steel plate 12 coated with the powder paint 13 as shown in FIG. To do. The moving device moves on the steel plate 12 according to a command from a marking control device (not shown). Immediately before the start of movement, the high-pressure air line by the air pump 7 and the vacuum line by the vacuum pump 10 are activated to eject high-pressure air from the air outlet 2a, and the powder coating material 13 on the steel plate 12 is blown up and floated. . For example, when the marking device moves from the right to the left in the drawing, the left outlet 2 located in front of the marking jig 3
The powder coating material 13 blown up by is sucked up by the suction port 4 and the powder coating material 13 applied to the surface of the steel plate 12 is removed. After that, a cutting line is marked on the steel plate 12 by the discharging action of the marking jig 3. Such a motion is a front-back, left-right motion, or 360 motion in a curved motion.
° In all directions of operation, high-pressure air is always ejected, suction removal by vacuum action, and marking are performed in this order. Therefore, the removal width indicated by the dotted line is constant even when the curved locus shown in FIG. 7B is moved, and the marking line indicated by the solid line is always drawn at the center of the removal width.

As shown in FIG. 3, the air outlet 2
It is also possible to form b toward the inside of the outer hood 1 and blow out the high pressure air at an angle θ. In this case, the outlet 2b may be formed by a plurality of holes or may be formed in a slit shape. In addition, the angles may be different from each other and provided in a plurality of stages. The powder coating material 13 is scattered and floated by the high-pressure air hitting the coated surface of the steel plate 12, and is removed from the recovery port 8a by the flow of the high-pressure air and recovered. In the case of this marking device, the powder coating material 13 can be sufficiently removed without suction by the vacuum pump 10 as in the marking device according to the above-described embodiment.

Powder coating 13 applied to the entire surface of steel plate 12
Is adhered to the surface of the steel plate 12 by static electricity, and it is necessary to remove only the powder coating 13 having a strong adhesive force adhered by static electricity, at a portion necessary for cutting, and leave other necessary coating portions.
In the construction process of vessels, large steel plates are cut into arbitrary shapes and various members are cut out and combined to form blocks, and the cutting shapes are complicated, such as straight lines and curves, and high cutting is required. Precision is required, and a rapid processing step is desired from the viewpoint of work efficiency. For this reason, the marking device has a high-speed removal capability of the powder coating material 13 in terms of work efficiency, and it is possible to process a removal portion having a complicated shape such as a straight line or a curved line. It is required that it can be collected and reused. Conventionally, when fusing a coated steel sheet with powder coating material, the powder coating material is excluded in advance and the cutting line is marked in an uncoated state. Further, the marking is performed by a dedicated marking device in a separate process, and it is not possible to simultaneously perform the removal of the powder coating material and the marking with the same device, but in the marking device according to each of the above-mentioned embodiments, static electricity is generated. The powder coating material 13 having a strong adhesive force is suspended from the steel plate 12 by high-pressure air and then sucked up by a vacuum action or eliminated by high-pressure air. By properly setting the arrangement, it is possible to obtain a peeling force equal to or greater than the adhesive force, and the boundary between the portion where the powder coating 13 is removed and the portion where the powder coating 13 is left is set clearly.
In addition, it is possible to collect all the suspended powder coating material 13. Further, since not only the suction force due to the vacuum action but also the gap between the steel plate 12 and the outer hood 1 can be set large, there is flexibility in the operation of the marking device and the setting conditions. Further, by making the outer hood 1 into a cylindrical shape and arranging the marking jig 3 in the center thereof, it is possible to remove the powder coating material 13 and perform marking at the same time, and the work is completed quickly in one step. . Also, a straight line,
Regardless of the shape of a curve or the like, the powder coating material 13 is always removed with the same width centered on the cutting line of marking, and the cutting line of marking and the removed portion of the powder coating material 13 are not separated. Thus, the powder coating material 13 having a strong adhesive force can be easily floated by the blowing force of the high pressure air by the present marking device, and the floating powder coating material 13 is sucked up by the vacuum action immediately after floating, Alternatively, by removing with high-pressure air, it is possible to accurately remove only necessary portions without scattering or diffusing to the surroundings. Further, marking can be performed at the same time when the powder coating material 13 is removed, and the working process is greatly shortened. Further, the outer hood 1 that blows out the high-pressure air and sucks the powder coating material 13 has a cylindrical structure, and the marking jig 3 is arranged at the center of the cylindrical shape to move the outer hood 1 in all directions of 360 °. Then, the powder coating material 13 is removed with a constant width by the outer hood 1, and the marking jig 3 can mark the center thereof. In addition, even if a complicated shape such as a straight line or a curved line is used, a cutting line by marking can be obtained with a certain accuracy. In addition, it is easy to deal with it by adjusting the blowout pressure, the degree of vacuum, etc. by the switching valves 6 and 9 without strictly defining the gap between the outer hood 1 and the steel plate 12.
The marking device can be easily operated. Further, the powder coating material 13 can be collected and reused without waste, and the cost performance is improved. Moreover, this marking device does not require measures against dust. Further, it can be easily additionally installed in the existing marking device.

[0013]

The marking device according to the present invention is constructed as described above, and it is possible to remove the powder coating material with a constant width with high precision and to mark the center of the removed width. The cutting accuracy is improved and the working process is shortened.

[Brief description of drawings]

FIG. 1 (a) is a sectional view of a marking device according to an embodiment of the present invention, and FIG. 1 (b) is a bottom view.

FIG. 2 is an explanatory diagram of its operation.

FIG. 3 is a cross-sectional view of a marking device according to another embodiment of the present invention.

[Explanation of symbols]

 1 Outer Hood 2 High Pressure Air Conduit 2a Blowout Port 2b Blowout Port 3 Marking Jig 4 Powder Suction Port 5 Hose 6 Switching Valve 7 Air Pump 8 Vacuum Hose 8a Recovery Port 9 Switching Valve 10 Vacuum Pump 11 Cable 12 Steel Plate 13 Powder Body paint

Claims (2)

[Claims] 1. A means for injecting a high-pressure gas from the lower part of a cylindrical outer hood toward a plate surface to be coated to float the powder coating material applied to the plate surface to be coated, and inside the outer hood. A marking device comprising: a means for sucking and removing the floating powder coating material; and a means for marking on the surface of the plate to be coated, which is provided in the central portion of the outer hood. 2. A high-pressure gas is jetted from the inside of a cylindrical outer hood toward a plate surface to be coated, and the powder coating material applied to the plate surface to be coated is floated to eliminate the floating powder coating material. A marking device comprising: a means and a means provided at a central portion of the outer hood for marking the surface of the plate to be coated.