KR20030069916A - Direct ink-jet printing device at the surface of 3 dimensional body - Google Patents

Abstract

PURPOSE: An ink jet type printer is provided to directly print patterns on a surface of a three-dimensional object and to obtain a clear printing image without requiring an additional process or a printing medium. CONSTITUTION: An ink jet type printer includes an ink spraying device(1), a driving device(2) and a conveying device(3). In addition, the ink jet type printer has a distance measuring sensor, an angle adjusting device, a distance adjusting device, a guide rail, a guide roller, a roller(10) and a spring(11). In order to attach the ink jet type printer to a wall, a frame(12) and a temporarily fixing unit(13) are provided in the ink jet type printer. The ink spraying device(1) has a supporting part in the form of a pin. The driving device(2) is driven by a motor. The conveying device conveys an object to be printed by a predetermined distance. The distance measuring sensor is aligned around the ink spraying device(1). The angle adjusting device is installed on the supporting part of the ink spraying device(1).

Description

Direct ink-jet printing device at the surface of 3 dimensional body}

The present invention relates to an inkjet printing apparatus, and more particularly, to an ink jetting sphere and a printing surface of an ink jetting apparatus, which is a condition for a clear and uniform printing on a three-dimensional object to be printed with respect to a conventional inkjet printing apparatus. Inkjet type printer that can print directly on the surface of a three-dimensional object, using a guide rail or roller, distance measuring sensor, angle measuring sensor, angle adjusting device, distance adjusting device, so that the distance and angle of the It is about.

In general, inkjet printers are designed to print on thin and flat objects such as paper or fabrics. The conventional inkjet type printer is shown in FIG.

As shown in FIG. 1, the conventional inkjet printer 10 includes an ink ejecting apparatus 1 for ejecting ink, a reciprocating driving apparatus 2 capable of reciprocating in the direction of the width of printed matter, A control device for controlling the ink ejection device 1, the drive device 2, and the transport device 3 by receiving a constant distance transport device 3 capable of transporting a predetermined amount in the longitudinal direction, and receiving an image to be printed from a computer. It consists of an apparatus (not shown).

Hereinafter, the outline of the prior art method, the ink injection device (1) is a piezo (Piezo) capable of spraying a predetermined amount of ink of a predetermined CYMK (red, yellow, blue, green) color by receiving an electrical signal and deforming It has a piezoelectric nozzle, has a pipe through which ink can be supplied from the ink reservoir, and is configured as a cylinder for storing ink.

The reciprocating drive device 2 is equipped with an ink jetting device 1, and a band and an optical sensor are provided on the transparent film in the longitudinal direction for reciprocating movement and the optical sensor is provided at the intervals, and when passing the scale By generating an electric pulse (Pulse) every time tells the position to eject the ink, it is possible to eject the ink of a predetermined color in the correct position. In this way, the ink jetting apparatus 1 performs printing of a predetermined length and width on the print object while reciprocating at a predetermined number and speed with the printable length and width.

The transfer device 3 is a device for transferring a print object of a predetermined length, and when the reciprocating drive device 2 in which the ink injection device 1 is installed completes printing in a printable length and width while reciprocating, the transfer device By repeating the process of performing the next printing by transferring the predetermined print width by (3), the continuous large image is printed.

However, in the conventional inkjet printing apparatus, the ink spraying apparatus 1 has a fixed distance and direction from the surface of the printing object, so that only a plane or a near object (difference in height: within 10 mm) is flat. There was a problem that printing was possible.

In particular, such a printing apparatus has a sharpness because the ejected ink is not sprayed at the correct position when the nozzle and the object collide with each other or the distance is too far in the case of a three-dimensional object having a large height difference (a height difference of 10 mm or more). Since the printing of the image is difficult, there is a problem in that it is impossible to directly print on a three-dimensional object that is substantially curved.

In addition, as shown in FIG. 2, when the ejected ink droplets have the same distance between the ink jetting sphere and the printing surface, the arrival position deviation of the ink droplets becomes larger as D and D1, and in the opposite case, becomes smaller, so that the sharpness of the image Results in worsening. For the same reason, when the distance from the printing surface is increased, the deviation becomes larger, and the distance and angle become very important factors for the sharpness when printing on a three-dimensional object. In addition, as shown in FIG. 3, the same ink injection amount is printed in the area of W x B in the plane, and in the case of the inclined plane, the area is printed in the area of W1 x B, and the ink becomes larger as the inclination angle becomes larger. This results in a lower density of. Therefore, when printing on a three-dimensional object by a general inkjet printing apparatus, the color and clarity of the image is worse than when printing on a flat surface.

The present invention has been proposed to solve the above problems, and an object thereof is to provide an apparatus capable of directly printing on a three-dimensional object.

Therefore, an object of the present invention is to provide a device capable of printing directly on a three-dimensional object that does not require a medium or a process for printing or decorating the three-dimensional object.

In addition, it is an object of the present invention to provide a device capable of printing directly on a three-dimensional object that can be obtained at all positions even by printing on a three-dimensional object by printing always perpendicular to the surface to be printed.

In addition, the present invention provides a device capable of printing directly on a three-dimensional object that can be directly attached to or installed on a printing device (a vehicle, a building, a fixture (door, wallpaper), or a home appliance) that is difficult to install or move. For the purpose of

1 is a view of a general inkjet printing apparatus

2 is a comparison of positional errors of ink droplets sprayed on a flat surface and an inclined surface

3 is a comparison of the density difference between the ink droplets sprayed on the plane and the inclined surface

Figure 4 is a method for constantly adjusting the distance and angle between the printing surface and the injection port using a non-contact sensor and the drive device

5 is an embodiment according to a method of constantly adjusting the distance and angle between the printing surface and the injection port using the non-contact sensor and the driving device

6 is an embodiment according to a method for constantly adjusting the distance and angle between the printing surface and the injection hole using the guide rail and the roller

Figure 7 is an embodiment of a method of constantly adjusting the distance and angle between the printing surface and the jetting hole using a roller and a spring

8 is an embodiment in which the embodiment of the method of constantly adjusting the distance and angle between the printing surface and the jetting hole using the roller and the spring to the wall attachment method

9 is a view of applying an embodiment in which the embodiment of the method of adjusting the distance and angle between the printing surface and the jetting hole uniformly using the roller and the spring to the wall attachment method.

<Explanation of symbols for main parts of drawing>

1. Ink jet device 2. Reciprocating drive device 3. Transfer device

4. Ink jetting hole 5. Distance and angle measuring sensor 6. Angle adjusting device

7. Distance adjusting device 8. Guide rail 9. Guide roller

10.Roller 11.Spring 12.Frame

13. Temporary fixing mechanism

In order to achieve the above object, the present invention provides a distance between the printing surface and the jetting port using a non-contact sensor and a driving device to maintain a right angle between the object to be printed and the ink jetting sphere. How to adjust the angle constantly, How to adjust the distance and angle between the printing surface and the nozzle by using the roller and the spring, and How to adjust the distance and angle between the printing surface and the nozzle by the guide rail and the roller There is a way to adjust.

The method of constantly adjusting the distance and angle between the printing surface and the jetting hole using the non-contact sensor and the driving device is one or more distance measuring sensors so as to measure the distance and angle between the printing target surface as shown in FIG. 5. Speed of the head member having a distance and angle adjusting device to print a predetermined width and length of the head, having the distance around the ink jetting sphere and controlling the distance and angle with the printing surface according to the measured distance and angle. It is installed in the controlled reciprocating drive device, and the transfer device that can be transported by a certain distance in order to print a continuous image on the printed object; to be a printing device capable of printing directly on a three-dimensional object, characterized in that it comprises a; desirable.

6 shows a method of constantly adjusting the distance and angle between the printing surface and the jetting hole using the guide rail and the roller. The speed is varied depending on the position to produce a guide rail having the same trajectory as the cross section of the object to be printed and installed in the ink spraying device, and having a guide roller constrained by the guide rail in an area of a constant width and length. It is installed in the controlled reciprocating drive device, and the transfer device that can be transported by a certain distance in order to print a continuous image on the printed object; to be a printing device capable of printing directly on a three-dimensional object, characterized in that it comprises a; desirable.

7 shows a method of constantly adjusting the distance and angle between the printing surface and the jetting port using a roller and a spring. The present invention for achieving the above object is provided with one or more rollers in the ink jetting apparatus, and when the reciprocating motion by the reciprocating drive device, by applying an elastic force such as a spring so as not to fall off the printing surface and the surface to be printed It is installed in the speed-controlled reciprocating drive device to print the ink ejection device to keep the distance and angle at a constant width and length, and can be transported by a certain distance to print continuous images on the printed object. It is preferable to be a printing device capable of printing directly on a three-dimensional object, characterized in that it comprises a conveying device.

In addition, the reciprocating drive device of which the t speed of the printing device is controlled, the frame on which the transfer device is installed, and the frame are installed at the corners of the frame so as to temporarily attach the surface to the surface of the product or an object for printing on large water or a fixed object. It is preferable to be a printing apparatus capable of directly printing on a three-dimensional object, characterized in that it comprises a suction mechanism or a temporary fixing mechanism.

Wherein the distance measuring sensor prevents the distance between the print object and the nozzle of the ink jet from becoming too close or far away from the standard print distance in a plane, and by using a mechanical measuring device to measure the surface of the print object. In order to prevent deformation or scratches on the surface, it is preferable to use a non-contact distance measuring sensor that can be printed directly on a three-dimensional object.

In addition, the distance and the angle adjusting device has the same mounting base to which the existing inkjet cartridge can be mounted so that the existing inkjet cartridge can be utilized, and the mounting stand is supported by a pin to adjust the angle of the mounting bracket, and the lever The drive is installed at the other end in such a way that the angle adjuster is mounted on a distance-adjustable conveying device, which is installed on the reciprocating drive to directly print on the three-dimensional object. It is desirable to be a printing apparatus that can.

The roller is preferably a printing device capable of printing directly on a three-dimensional object, by making the distance between the print object and the nozzle of the ink jet constant so that the distance and angle with the print object are constant.

In addition, the spring does not fall off the surface of the print object during the reciprocation or transfer of the ink jetting device for printing, thereby maintaining a constant distance and angle between the ink jetting sphere and the printing surface to obtain a clear image It is desirable to be a printing apparatus capable of printing directly on a three-dimensional object characterized in that.

In addition, the frame, the reciprocating drive device and the transfer device is controlled speed is installed, the adsorption mechanism or the temporary fixing mechanism is installed at the corner is characterized in that it is temporarily attached to the wall of the building or the door of the refrigerator, the surface of the vehicle It is desirable to have a printing apparatus capable of printing directly on a dimensional object.

Since the guide rail has the same trajectory as that of the cross section of the printing target surface, the distance and angle between the ink jetting port and the printing surface are constant, and the guide rail is operated by a rigid guide rail, thereby indicating an accurate position accuracy. In addition, it is desirable to be a printing apparatus capable of directly printing on a three-dimensional object characterized in that it is possible to prevent the surface from being deformed or scratched by being in contact with the printing object.

The guide roller is installed in the ink jetting apparatus and moves along the guide rail to make the distance between the print object and the nozzle of the ink jet constant so that the distance and angle with the print object are constant. It is desirable to be a printing apparatus capable of printing directly.

Hereinafter, a printing apparatus capable of printing directly on a three-dimensional object according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view of a general inkjet printing apparatus, FIG. 2 is a comparison of positional errors of ink droplets sprayed on a plane and an inclined plane, and FIG. 3 is a comparison of a density difference of ink droplets injected on a plane and an inclined plane. And, Figure 4 is a description of a method of constantly adjusting the distance and angle between the printing surface and the injection hole using the non-contact sensor and the drive device, Figure 5 is a printing surface and the injection using the non-contact sensor and the drive device An embodiment according to a method of constantly adjusting the distance and angle with the sphere. Figure 6 is an embodiment according to the method for constantly adjusting the distance and angle between the printing surface and the jetting hole using the guide rail and the roller, Figure 7 shows the distance and angle between the printing surface and the jetting hole using the roller and the spring 8 is an embodiment of the method of adjusting the distance and the angle between the printing surface and the jetting hole by using a roller and a spring, the embodiment of changing the method to the wall attachment method, Figure 9 is The embodiment in which the embodiment of the method of constantly adjusting the distance and angle between the printing surface and the jetting hole by using a roller and a spring is applied to the wall surface attachment method.

As shown in the drawings, a printing apparatus capable of directly printing on a three-dimensional object according to an embodiment of the present invention is an ink jet device (1), a reciprocating drive device (2), the speed is adjustable, the transfer device (3) Are used in the same manner, and according to the method applied, the distance measuring sensor 5 and the angle adjusting device 6, the distance adjusting device 7 and the guide rail 8, the guide roller 9, and the roller 10 and Each of the springs 11 is composed of a frame 12 and a temporary fixing mechanism 13 for wall attachment.

The ink injection device 1 is the same as a conventional inkjet cartridge and head member, and has a support in the form of a pin so as to be attached to an angle adjusting device.

The reciprocating drive device 2 is installed in the structure of the printer, and is driven by a motor like a conventional printer, the drive source (not shown) can be used a variety of devices such as a conventional motor or pneumatic cylinder.

The conveying apparatus 3 is configured in a table manner to convey the print object by a predetermined distance, and is driven by a motor or a pneumatic cylinder.

The distance measuring sensor 5 is installed around the ink injection device 1, and can measure the distance with one sensor, and can measure the distance and the angle in the printing width direction with two sensors. More than one sensor can also measure the angle in the longitudinal direction, allowing more precise control of distance and angle from the printed surface.

The angle adjusting device 6 is installed on the support of the ink spraying device 1, and adjusts the angle according to the measured value of the distance measuring sensor 5 so that the direction of the ink jetting port 4 is perpendicular to the printing surface. Keep the direction.

The distance adjusting device 7 is installed on the support of the angle adjusting device 6 and adjusts the distance according to the measured value of the distance measuring sensor 5 so that the distance between the ink jet port 4 and the printing surface is appropriate. To keep.

The guide rail 8 is installed on the support of the reciprocating drive device 2, and has the same trajectory as the cross section of the print object or a modified trajectory based on the trajectory, while maintaining a constant distance from the printing surface. It allows printing in a direction perpendicular to the printing surface.

The guide roller 9 is installed around the ink spraying device 1 and is constrained by the guide rail 8, and can print a certain distance with one roller, and the distance and print width with two rollers. Because the angle of orientation can be kept vertical, the distance and angle from the printed surface can be precisely controlled.

The roller 10 is installed around the ink spraying device 1, and can print a certain distance with one roller, and precisely because two rollers can keep the angle of the distance and the print width direction vertically. You can control the distance and angle to the printed surface.

The spring device 11 is installed between the support portion of the ink injection device 1 and the reciprocating drive device 2 so that the roller 10 installed in the ink injection device 1 does not fall off from the printing surface.

The frame 12 is provided with a reciprocating drive device 2 and a transfer device 3, and is attached to the surface of the wall, home appliances, vehicles, and the like.

The temporary fixing mechanism 13 is installed on the frame 12 and fixed to the surface of the object to be printed by a temporary fixing furniture such as an adsorption mechanism or a magnet.

As described above, according to the printing apparatus capable of directly printing on the three-dimensional object according to the present invention, there is an effect that can be printed directly on the three-dimensional object, the molding of the existing product without other media or process.

And because it is a digital printing method and can be printed directly on the product, different images can be printed on each product as many times as necessary, so when printing a sample or souvenir, it can be directly executed on a three-dimensional object that can be quickly and cost-effectively There is an effect that a printing apparatus capable of printing is provided.

In addition, since the printing directly on the product only with ink, there is an effect that a printing apparatus capable of printing directly on a three-dimensional object that can provide a product that is easier to recycle, unlike the way the film is attached.

When applying the guide rail and guide roller method, there is provided a printing apparatus capable of printing directly on a glass cup or rod having a three-dimensional shape of the axial symmetry, a three-dimensional object that can be directly printed on an object having a certain shape in the longitudinal direction It works.

Applying the roller and the spring method and the attachment method, there is an effect that a printing device capable of printing directly on a three-dimensional object, such as large objects, difficult to move walls or doors, automobiles.

Using a method using a guide rail and a guide roller method or a non-contact sensor has an effect of providing a printing apparatus capable of printing directly on a three-dimensional object without damaging the surface of the product.

Although the present invention has been described with reference to the embodiments illustrated in the accompanying drawings, it is intended to be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (11)

An angle adjusting device for adjusting the angle of the ink jetting device, having at least one device capable of measuring a distance around the ink jet type ink jetting device, and the ink jetting device are provided, and the ink jetting device of the ink jetting device Directly to the three-dimensional object having a distance adjusting device that can adjust the center distance between the sphere and the surface to be printed, a reciprocating device that reciprocates in the width direction of the printed object, and a conveying device that moves the printed object by a certain distance. In the printing apparatus which can print, By measuring the distance and angle with the printing object using the one or more distance measuring sensor, and controlling the angle adjusting device and the distance adjusting device, the angle between the printing surface and the jetting direction of the ink jetting device is at right angles, the distance is A printing device that can directly print on a three-dimensional object to control the angle adjusting device and the distance adjusting device to maintain a constant, to print a constant and clear image on the surface of the three-dimensional object. According to claim 1, wherein the distance measuring device, A printing apparatus capable of directly printing on a three-dimensional object, characterized in that for generating a signal by measuring the distance to the printing surface of the object to be printed, to control the angle adjusting device and the distance adjusting device. The angle adjusting device of claim 1 or 2, It is possible to control the ejection angle of the ink ejection apparatus from the angle between the printing surface measured by the distance measuring device and the direction of the ink ejection sphere to make the amount of ink printed on the printed object constant and to print a clear image. A printing apparatus capable of printing directly on a three-dimensional object. According to claim 1, wherein the distance adjusting device, 3D, characterized in that the distance between the printing surface and the ink jetting sphere measured by the distance measuring device and the distance between the ink jetting sphere and the printing surface of the object to be printed are kept within a distance capable of clear printing while the density of the printed ink is constant. A printing device that can print directly on an object. One or more rollers are installed around the inkjet ink jetting device, and a guide rail which is the same as the trajectory of the cross section of the printing object is restrained, and the reciprocating driving device reciprocates in the width direction of the printing object. In the printing apparatus capable of printing directly on a three-dimensional object having a conveying device for transporting a print object by a predetermined distance, The one or more rollers are guided to the ink jetting device along the same guide rail as the cross-sectional trace of the print object, so that the angle between the printing surface and the ink jetting device is perpendicular to each other and the distance is kept constant. A printing device that can directly print on a three-dimensional object to print a constant, clear image. The guide roller of claim 5, And a printing apparatus installed on the ink ejection apparatus and guided along the guide rail having the same shape as the print object. The method of claim 5, wherein the guide rail, It has the same trajectory as the shape of the cross section of the object to be printed, the ink jetting apparatus is kept at a constant distance from the printing surface, and the ink jetting apparatus is perpendicular to the printing surface to enable uniform printing on the surface of the printing surface. A printing apparatus capable of printing directly on a three-dimensional object, characterized in that for printing a clear image such as printing on. The ink jetting apparatus is installed while maintaining a constant distance from the printing surface around the ink jet type ink jetting apparatus, and having one or more rollers such that the angle between the printing surface and the nozzle of the ink jetting apparatus is perpendicular to each other. A spring device provided to maintain contact while the roller installed in the ink jetting device is printed, a reciprocating device for reciprocating in the width direction of the print object, a conveying device for transferring the print object by a certain distance, and a reciprocating drive In the printing device capable of printing directly on a three-dimensional object is provided with a device and a transfer device, a movable fixing frame, installed on the corner of the fixing frame, and a temporary fixing mechanism that can be temporarily fixed to the surface of the object, By using the one or more rollers and the spring mechanism to make the distance and angle to the print object constant, it is possible to print a constant and clear image on the surface of the three-dimensional object, and using a movable fixing frame and temporary fixing mechanism The printing apparatus can directly print on a three-dimensional object such as a large object or a fixed object that is difficult to print. The method of claim 8, wherein the roller, A printing apparatus capable of directly printing on a three-dimensional object characterized in that the distance between the nozzle and the printing surface of the ink jetting apparatus in contact with the printing object to be constant. The method of claim 8, wherein the spring device, The rollers installed in the ink jetting apparatus maintain contact while printing on the printed object, so that the amount of printed ink per surface area of the printing surface is kept constant, and a clear image can be printed directly on the three-dimensional object. Printable printer. The method of claim 1, 5, 8, wherein the frame, A printing apparatus capable of printing directly on a three-dimensional object, having a temporary fixing mechanism to be attached to the surface of a large object or a fixed object that is difficult to move or attach to the printer, and is provided with a reciprocating drive device and a transfer device.