MXPA06015209A

MXPA06015209A - Coloring nozzle.

Info

Publication number: MXPA06015209A
Application number: MXPA06015209A
Authority: MX
Inventors: Takeshi Kamata; Keigo Sugimura; Kiyoshi Yagi; Sei Saito
Original assignee: Yazaki Corp
Priority date: 2004-06-25
Filing date: 2005-06-24
Publication date: 2007-03-14
Also published as: EP1775028A1; CN100434195C; JP2006007116A; WO2006001372A1; EP1775028A4; CN1993186A; JP4426911B2; EP1775028B1; PT1775028E

Abstract

A coloring nozzle capable of securely injecting the droplets of a coloring material ina fixed amount each to a specified position on the outer surface of an article. Thecoloring nozzle (31) colors a wire (3) by injecting the droplets of the liquid coloringmaterial in a fixed amount each to the outer surface (3a) of the wire (3) as the article.The coloring nozzle (31) comprises a nozzle (54) injecting the droplets of thecoloring material, a nozzle cover (55), and a washing fluid supply source (62).The nozzle cover (55) covers at least the tip part (37b) of the nozzle (54). Thetip face (50b) of the nozzle (54) and the end face (56a) of the nozzle cover (55)are positioned on the same plane. The washing fluid supply source (62) supplies awashing fluid to the inside of the nozzle cover (55). The coloring nozzle (31) injectsthe droplets of the coloring material from the nozzle (54) in the state of the washingfluid being kept in the nozzle cover (55) by surface tension.

Description

COLORING NOZZLE Field of the Invention This invention relates to a nozzle for coloration by use in coloration, for example, of an electrical wire having an electrically conductive core wire and an electrically insulating coating for coating the core wire.

BACKGROUND OF THE INVENTION Several electronic devices are mounted in a motor vehicle as a mobile unit. Therefore, the motor vehicle includes a wire harness for transmitting power from a power source, and control signals from a computer to electronic devices. The wire harness that includes a plurality of electrical wires and connectors attached to the ends of the wires. The wire includes an electrically conductive core wire and an elaborate insulating synthetic resin coating that coats the core wire. The wire is a so-called coated wire. A connector includes a terminal adapter and a connector housing that receives the terminal adapter therein. The terminal adapter, consisting of an electrically conductive laminated metal or the like, is attached to one end of the wire and electrically connected to the core wire of the wire. The connector housing made of electrically insulated synthetic resin is formed into a square shape. When the connector housing is connected to the electronic devices, each wire of the wire harness is connected to the corresponding electronic device through the terminal adapter, whereby the wires of the wire harness transmit the desired electrical energy and the signals to the devices electronic When the wire harness is assembled, first the wire is cut to a specific length and then the terminal adapter is attached to one end of the wire after removing the coating near the end. A wire is connected to another wire according to the need. Subsequently, the terminal adapter is inserted into the connector housing, thereby mounting on the wire harness. The wire harness wire should be distinguished in terms of the size of the core wire, the coating material (with respect to the alteration in the materials depending on the property of heat resistance), and a purpose of use. The purpose of use means, for example, systems in a motor vehicle in which the wires are used, such as an airbag, an anti-lock braking system (ABS), a control signal for this speed data, and an energy transmission system. The coating of the wire used in the wire harness has been colored to a desired color by mixing a coloring material of the desired color with synthetic resin what constitutes the coating when the synthetic resin of the coating is applied to the circumference of the core wire by extrusion (for example, see Patent Documents 1 to 3). In this case, when a color of an outer surface of the wire is altered, it is necessary to stop the operation of the extrusion apparatus that performs the extrusion coating. That is, as many times the color of the wire is changed, it is necessary to stop the operation of an extrusion apparatus, causing an increase in the period of time and hours of labor required for the production of the wire and deteriorating the productivity of the wire. Alternatively, the coloring material to be mixed has been replaced when the extrusion apparatus is performing the extrusion coating. In this case, just after the color change of the coloring material, a wire, in the color of the synthetic resin from which a coloring material is mixed before the replacement and a coloring material after the replacement, has been inevitably manufactured, causing deterioration in the production of wire material. In order to prevent deterioration in the productivity of the wire and in the performance of the wire material, the present applicant proposes a method, in which monochromatic wire is produced, then the outer surface of the wire as an object is colored with a desired color according to need, thereby mounting a wire harness (see Document 4 of Patent). Alternatively, the present applicant proposes an apparatus for coloring wire, by which in the coloring of a monochromatic wire, a specific amount of liquid coloring material is discharged onto the outer surface of the wire as an object for depositing the dye material discharged into the wire. the outer surface of the wire, thus coloring the wire with the desired color (see Document 5 of Patent). [Patent Document 1] JP-A, H05-111947 [Patent Document 2] JP-A, H06-119833 [Patent Document 3] JP-A, H09-92056 [Patent Document 4] WO 03019580 [Document 5 Patent Application Japanese Patent Number 2003-193904 The dye material discharged onto the outer surface of the wire means a liquid substance, in which a dye material (organic substance for use in industry) is dissolved and dispersed in water or another solvent. The organic substance described above is a dye or a pigment (most of which are organic substances and synthetic substances). Sometimes, the dye is used as the pigment and the pigment is used as the dye. Therefore, in the wire coloring apparatus described in the previous application, when the discharges are repeated from the nozzle for coloring, the dye or pigment can be deposited in the nozzle for coloring, and the amount of the dye can be increased or the pigment that is deposited in the nozzle for coloring. When the coloring material is deposited in the nozzle for coloring, the nozzle can not discharge the coloring material in a desired direction, and can not discharge a specific amount of the coloring material. In this case, it is difficult to color a desired position of the wire, and the colored areas on the wire vary. Accordingly, it is difficult to discharge a specific amount of the coloring material at a desired position from the outer surface of the wire as an object with the coloring nozzle into which the coloring material is deposited.

Accordingly, it is an object of the present invention to provide a coloring nozzle by discharging a specific amount of coloring material reliably at a desired position on the outer surface of the object.

Description of the Invention In order to achieve the object, according to the present invention as claimed in claim 1, a coloring nozzle is provided by discharging a specific amount of liquid coloring material onto an exterior surface of the object and by depositing the dye material discharged on the exterior surface of the object, the coloring nozzle including: a receiver for receiving the coloring material; a pressurization unit for pressurizing the coloring material in the receiver; a nozzle element that is formed in a cylinder-like shape, through which the coloring material flows, the nozzle element communicating with the receiver; a valve that is mounted at one end of the bottom of the nozzle member positioned within the receiver, and is allowed to attach to and detach from the bottom end to scan the dye material through the nozzle member; a nozzle cover covering at least one upper end of the nozzle member, and allowing the dye material discharged through the nozzle member to be deposited on the object; and a cleaning liquid supply unit deposited in the nozzle cover to supply a cleaning liquid, the cleaning liquid used to remove the coloring material that is deposited on the nozzle element, so under a condition that the cleaning liquid supplied from the cleaning liquid supply unit to the nozzle cover is held in the nozzle cover by the surface tension thereof, the coloring nozzle discharges the coloring material through the nozzle element on the object . According to the present invention as claimed in claim 2, there is provided the coloring nozzle, wherein a terminal wall of the nozzle cover facing the object and an upper end wall of the nozzle element, both giving towards the object, they are arranged in the same plane. According to the present invention as claimed in claim 1, the cleaning liquid is supplied to the nozzle cover that covers at least the upper end of the nozzle element. Then, the cleaning liquid is maintained in the nozzle cover with the surface tension thereof. In this way, the cleaning liquid makes constant contact with the upper end of the nozzle element, and the coloring material, in particular near being deposited at the upper end of the nozzle element, is immediately removed from the upper end wall of the nozzle element. Incidentally, in this specification, the coloring material means a liquid substance, in which an organic substance is dissolved for industrial use and dispersed in water or another solvent. The organic substance described above is a dye or a pigment (most of which are organic substances and synthetic substances). Sometimes a dye is used as a pigment and a pigment is used as a dye. As a concrete example, the coloring material can be a coloring material or a coating material. The coloring material is a liquid, in which a dye is dissolved or dispersed in a solvent, such as the coloring material. When the outer surface of the object is colored with a coloring liquid, the dye permeates the object. When the outer surface of the object is colored with a coating material, the pigment deposits on the outer surface without permeating the object. In the specification, "coloring the outer surface of the object" means dyeing a part of the outer surface of the object with a dye or coating a part of the outer surface of the object with a pigment. Preferably, the solvent and the liquid dispersion have an affinity to the synthetic resin constituting the object in order to safely pierce the dye into the coating or to allow the pigment to deposit safely on the outer surface of the object . In this specification, "discharge" means that the liquid coloring material in a state of a liquid drop is injected vigorously from the coloring nozzle onto the outer surface of the object. Additionally, the cleaning liquid in this specification means a liquid such as a solvent or a liquid dispersion in which the organic substance is dissolved or dispersed for use in the industry, which constitutes the coloring material. Preferably, the cleaning liquid is not volatile, particularly at room temperature. According to the present invention as claimed in claim 2, since the terminal wall of the nozzle cover and the upper end wall of the nozzle element are arranged in the same plane, the cleaning liquid is supplied from the nozzle unit. The supply of cleaning liquid to the nozzle cover is maintained in the nozzle cover by the surface tension thereof in a manner such that a surface of the cleaning liquid, the terminal wall of the nozzle cover, and the upper terminal wall of the Nozzle element are arranged in the same plane.

Brief Description of the Figures Figure 1 is a schematic view showing an electric wire coloring apparatus including a coloring nozzle according to an embodiment of the present invention. Figure 2 is a sectional view showing a configuration of a coloring unit of the electric wire coloring apparatus taken on line II-II in Figure 1. Figure 3 is an explanatory sectional view showing a positional relationship between the coloration nozzles of the coloring unit shown in Figure 2 and an electric wire. Figure 4 is a sectional view showing a configuration of the coloring nozzle of the coloring unit shown in Figure 2. Figure 5 (a) is a perspective view showing an electric wire colored by the coloring apparatus the electric wire shown in Figure 1. Figure 5 (b) is a plan view showing the electric wire shown in Figure 5 (a) Figure 6 is an explanatory view showing a state that the cleaning liquid is supplied in a nozzle cover of the coloring nozzle shown in Figure 4. Figure 7 is an explanatory view showing a state that the dye material is discharged through the coloring nozzle used in Figure 4.

BEST MODE FOR CARRYING OUT THE INVENTION In the following, an embodiment of a coloring nozzle 31 according to the present invention will be explained with reference to Figures 1 to 7. The coloring nozzle 31 shown in Figure 4 constitutes (mounts in) an apparatus for coloring an object, which is an electric wire 1 in this embodiment (hereinafter referred to as "coloring apparatus") as a machine for coloring. wire processing. The coloring apparatus 1 cuts an electrical wire 3 as the object to a predetermined length, and marks a mark 6 on an outer surface 3a of the wire 3 as the object. Scientifically, the coloring apparatus colors (marks) the outer surface 3a of the wire 3 as the object. The wire 3 as the object constitutes a wire harness arranged in a vehicle as a mobile unit. As shown in Figure 5 (a), the wire 3 includes an electrically conductive core wire 4 and an electrically insulating coating 5. A plurality of wire elements are joined to form the core wire 4. Each wire element of the core wire 4 is made of electrically conductive metal. The core wire 4 can be constituted by a single wire element. A coating 5 is made of synthetic resin such as polyvinyl chloride (PVC). The coating 5 covers the core wire 4. Therefore, the outer surface 3a of the wire 3 means an outer surface of the coating 5. The coating 5 has a color P monochrome. A desired coloring material can be mixed with the synthetic resin of the coating 5 to make the color of the outer surface 3a of the wire 3 which is the color P monochrome, or alternatively, the color P monochrome can be adjusted as the color of the synthetic resin itself without adding a coloring material to the synthetic resin of the coating 5. In the latter case, the outer surface 3a of the wire 3 is not colored, specifically, the coating 5 is not colored. The outer surface 3a of the wire 3 is not It can color, or have a monochrome color such as white. On the outer surface 3a of the wire 3, a mark 6 is formed consisting of a plurality of points 7. The point 7 has a color B (indicated by parallel oblique lines in Figure 5), which is different from the monochrome color P. The point 7 is round in the plan view as shown in Figure 5. A plurality of the points 7 are arranged in the longitudinal direction of the wire 3 according to a predetermined pattern. The distance between the centers of the points 7 located adjacent to each other is predetermined. A plurality of wires are tied 3, and connectors are attached to the respective ends of the wires 3, thereby constructing a wire harness. The connectors are coupled with respective coupling connectors of various electronic instruments in a motor vehicle and the like, whereby wires 3 of the wire harness transmit various signals and electrical energy to electronic instruments. The wires 3 can be distinguished from each other by changing a color B of each point 7 of the mark 6. In the Figure, as an example, the color B of all the points 7 of the wire 3 is set equal, however, the color B can be changed for the respective points 7 as required. Color B is used to distinguish types of wires 3 in wire systems or harnesses. That is, color B is used to distinguish the types of wires 3 in the wire harness or the purposes of use. As shown in Figure 1, the coloring apparatus 1 includes a frame 10 as a main body of the apparatus, a guide roller 11, a pair of distribution rollers 12 as a conveyor, a straightening unit 13 for straightening the wire, a slack absorption unit 14 as a slack absorber, a coloring unit 15, a duct 16, an encoder 17 as a detector, a cutting machine 18 as a processor, and a controller 19 as a control machine. The frame 10 is installed on a floor of a factory. The frame 10 extends horizontally. The guide roller 11 is mounted rotatably on one end of the frame 10. The continuous wire 3 not having the mark 6 is wound on the guide roller 11. The guide roller 11 transfers the wire 3 to the straightening unit 13, the slack absorption unit 14, coloration unit 15, conduit 16, encoder 17 and cutting machine 18, in sequence. The pair of distribution rollers 12 is mounted on the other end of the frame 10. The pair of distribution rollers 12 is rotatably supported by the frame 10, and is arranged vertically. The distribution rollers 12 are rotated by the same revolutions in a direction opposite to each other by this motor (not shown). The pair of distribution rollers 12 captures the wire 3, and pulls the wire 3 of the guide roller 11 in a longitudinal direction of the wire 3. The distribution rollers 12 work like a pulling machine to pull the wire 3 in the longitudinal direction of the wire. wire 3. In this way, the distribution rollers 12 transfer the wire 3 in the longitudinal direction of the wire 3 to move the wire relative to a coloration nozzle 31, described below, of the coloration unit 15 in the longitudinal direction . Therefore, the wire 3 is transferred along an arrow K in Figure 1 from the guide roller 11 to the distribution rollers 12. The arrow K indicates a direction of transfer of the wire 3. The straightening unit 13 is mounted on the distribution rollers 12 beside the guide roller 11, between the distribution rollers 12 and the guide roller 11. Specifically, the straightening unit 13 is placed downstream of the guide roller 11 and upstream of the distribution rollers 12 in the transfer direction K of the wire 3. The straightening unit 13 includes a plate-shaped unit body 20, a plurality of first rollers 21, and a plurality of second rollers 22. The unit body 20 is fixed to the frame 10. The first and second rollers 21, 22 are rotatably supported by a unit body 20, respectively. A plurality of the first rollers 21 are arranged horizontally (in the transfer direction K), on the wire 3. A plurality of the second rollers 22 are arranged horizontally (in the transfer direction K), under the wire 3. As shown in Figure 1, the first and second rollers 21, 22 are arranged in a stepped manner. The straightening unit 13 puts the wire 3, which is transferred by the distribution rollers 12 from the guide roller 11, between the first and second rollers 21, 22. Then, the straightening unit 13 makes the wire 3 straight. Additionally, the straightening unit 13 gives friction to the wire 3 when placing the wire 3 between the first and second rollers 21, 22. Specifically, the straightening unit 13 gives the wire 3 the first energizing force Hl in a direction appropriate to the pulling force applied from the distribution rollers 12 to the wire 3 (in the transfer direction K). The first energizing force Hl is smaller than the pulling force applied to the distribution rollers 12 to the wire 3. Therefore, the straightening unit 13 stretches the wire 3 in the longitudinal direction of the wire 3. The unit 14 of Slack absorption is mounted on the distribution rollers 12 beside the straightening unit 13, between the straightening unit 13 and the distribution rollers 12. Specifically, the slack absorption unit 14 is placed downstream of the straightening unit 13 and upstream of the distribution rollers 12 in the transfer direction K of the wire 3. The slack absorption unit 14 is arranged between the unit 13 of straightening and the coloring nozzle 31 described further in front of the coloring unit 15. As shown in Figure 1, the slack absorption unit 14 includes a pair of guide rollers 24, a pair of support frames 23 for supporting the pair of guide rollers 24, a movable roller 26, a support frame 25 for supporting the movable roller 26, and an air cylinder 27 as an energizing member. The support frames 23 are fixed to the frame 10. The support frames 23 are arranged vertically upwards from the frame 10. There is a space between the pair of support frames 23 in the transfer direction K of the wire 3. The frames 23 support the pair of guide rollers 24 rotatably. The guide rollers 24 are placed under the wire 3, and guide the wire 3 so as not to deflect the wire 3 from the transfer direction K by the outer peripheral walls of the rollers. guide 24 making contact with the wire 3. In this way, the guide rollers 24 guide the wire 3 in the transfer direction K. The support frame 25 for the movable roller 26 is fixed in the frame 10. The support frame 25 is arranged vertically upwards from the frame 10. The support frame 25 for the movable roller 26 is placed in the middle part of the pair of support frames 23 for the guide rollers 24. The movable roller 26 is rotatably supported by the support frame 25 for the movable roller 26 and can be moved in a vertical direction along the support frame 25. The movable roller 26 is placed on the wire 3. The movable roller 26 is movably supported in the vertical direction, specifically, it is movably supported in a direction orthogonal to the transfer direction K of the wire 3. Additionally, the roller 26 is positioned in the middle part of the pair of guide rollers 24. The air cylinder 27 includes a cylinder body 28 and an extendable rod 29 which can extend from the cylinder body 28. The cylinder body 28 is fixed to the support frame 25 for the movable roller 26, and is placed on the wire 3. The extendable rod 29 can extend downwardly from the cylinder body 28. Specifically, the extendable rod 29 can be expanded from the cylinder body 28 to the wire 3. The movable roller 26 is attached to the extendable rod. 29. By supplying a compressed gas to the interior of the cylinder body 28, the air cylinder 27 energizes the extendable rod 29, specifically, the movable roller 26 with the second energizing force H2 (shown in Figure 1) downward in an orthogonal direction to the transfer address K Therefore, the air cylinder 27 energizes the movable roller 26 with the second energizing force H2 towards the wire 3. The second energizing force H2 is smaller than the first energizing force Hl. When the distribution rollers 12 temporarily stop the transfer of the wire 3 to cut the wire 3 by a pair of cutting blades 48, 49 described further ahead of the cutting machine 18 approach each other, the wire 3 is still transferred to it. length of the arrow K by a force of inertia, so that the wire 3 hangs between the pair of guide rollers 24. At this time, since the air cylinder 27 is energizing the movable roller 26 with the second energizing force H2 in the slack absorption unit 14 having the constitution described above, the extendable rod 29 of the air cylinder 27 extends to move the movable roller 26, for example, to a position shown as a two-point chain line in the Figure 1. Then, the slack absorption unit 14 energizes the wire 3 hanging between the pair of guide rollers 24 as described above in the direction orthogonal to the transfer direction K The dyeing unit 15 is mounted on the distribution rollers 12 beside the slack absorption unit 14, and is mounted between the slack absorption unit 14 and the slack absorber and absorbs the slack to keep the wire under tension. pair of rollers 12 distribution. Specifically, the coloration unit 15 is placed downstream of the slack absorption unit 14 and upstream of the distribution rollers 12 in the transfer direction K of the wire 3. Therefore, the coloring unit 15, specifically, the coloring nozzle 31 described below is placed between the pair of distribution rollers 12 and the straightening unit 13.

As shown in Figure 2, the coloration unit 15 includes a unit body 30, a plurality of coloration nozzles 31. The unit body 30 supports a plurality of coloration nozzles 31. The coloration nozzle 31 having the The above-described constitution discharges a specific amount of the liquid coloring material supplied from the source 32 of coloring material to the outer surface 3a of the wire 3. The coloring nozzle 31 allows the drop or discharged liquid droplets to be deposited on an outer surface 3a of the wire 3 to color (or mark) at least a portion of the outer surface 3a of the wire 3. A detailed constitution of this coloring nozzle 31 will be explained below. When the coloring nozzles 31 are attached to the unit body 30, the nozzles colorings 31 are arranged in the direction K of transfer wire 3. As shown in Figure 1, five b coloring nozzles 31 of the unit body 30 in the direction of transfer K of the wire 3. As shown in Figure 3, each coloring nozzle 31 is retracted by the unit body 30 in a condition that the uppermost part 3b of the wire 3 is located on an extension of an axis R (shown with a line of alternate short and long dashes in Figure 3) of the first nozzle members 37 described below. Each coloring nozzle 31 discharges the coloring material along the axis R. That is, each coloring nozzle 31 discharges a specific amount of the coloring material into the uppermost part 3b of the wire 3. In the coloring unit 15, in the application of a voltage to a spiral 40 of the optional coloration nozzle 31 according to the signal from the control device 19, a valve 44 described later is detached from the bottom end 37a of the first nozzle member 37. Then, the coloring unit 15 discharges a specific amount of the coloring material in the flow passage 39 of the desired colored nozzle 31 towards the outer surface 3a of the wire 3. In this description, the coloring material is used the consistency of which is equal to or less than 10 millipascales second point (mPa * s). The coloring material means a liquid substance, in which a coloring material (organic substance for use in industry) is dissolved and dispersed in water or another solvent. The organic substance described above is a dye or a pigment (most of which are organic substances and synthetic substances). Sometimes a dye is used as a pigment and a pigment is used as a dye. As a more concrete example, the coloring material is a coloring liquid or coating material. The coloring liquid is a liquid, in which a dye is dissolved or dispersed in a solvent. The coating material is a material, in which a pigment is dispersed in a liquid dispersion. When the coloring liquid is deposited on the outer surface 3a of the wire 3, the dye is permeated in the coating 5. When the coating material is deposited on the outer surface 3a of the wire 3, the pigment is deposited on the outer surface 3a without Perforating on the liner 5. That is, the coloring unit 15 dyes a part of the outer surface 3a of the wire 3 with a dye or coats a part of the outer surface 3a of the wire 3 with a pigment. That is, "coloring the outer surface 3a of the wire 3" means dyeing a part of the outer surface 3a of the wire 3 with a dye or coating a part of the outer surface 3a of the wire 3 with a pigment. Preferably, the liquid dispersion and the solvent have an affinity to the synthetic resin constituting the coating 5 in order to safely pierce the dye into the coating 5 or to allow the pigment to deposit safely on the outer surface 3a. The "discharge" described above means that the liquid coloring material in a state of the liquid droplet is ejected vigorously from the coloring nozzle 31 towards the outer surface 3a of the wire 3. The conduit 16 is mounted on the distribution rollers 12 on the side of the coloring unit 15 between the coloring unit 15 and the distribution rollers 12. Specifically, the conduit 16 is deposited downstream of the coloring unit 15 and upstream of the distribution rollers 12 in the transfer direction K of the wire 3. The conduit 16 has a cylinder shape, and the wire 3 is passed through through the conduit 16. A suction member not shown such as a vacuum pump is connected to the conduit 16. The aspirating member sucks a gas into the conduit 16 to prevent the solvent or the liquid dispersion of the coloring material from filling the exterior of coloring apparatus 1. The encoder 17 is placed downstream of the distribution rollers 12 in the transfer direction K of the wire 3. As shown in Figure 1, the encoder 17 includes a pair of rotors 47. The rotors 47 are rotatably supported about of the axes of the rotors 47. The outer circumferential surfaces of the rotors 47 make contact with the outer surface 3a of the wire 3, which is maintained between the pair of distribution rollers 12. When the core wire 4, specifically, the wire 3 is sent along the arrow K, the rotors 47 are rotated. The transferred length of the wire 3 along the arrow K is proportional to the number of revolutions of the rotors 47. The encoder 17 is connected to the controller 19. When the rotors 47 rotate through a specific angle, the encoder 17 transfers a signal of impulse to the controller 19. That is to say, the connector 17 measures the data corresponding to the transferred length of the wire 3 along the arrow K and transfers the data to the controller 19. In this way, the encoder 17 measures the data corresponding to the transferred length of the wire 3. and transfers the data corresponding to the transferred length of the wire 3 to the controller 19. Normally, the encoder 17 transfers the pulse signal corresponding to the length transferred to the wire 3 with the help of the friction between the wire 3 and the rotor 47 However, when the transferred length of the wire 3 does not match the pulse number due to a condition of the outer surface 3a of the wire 3, the speed data of the movement of the wire 3 can be obtained otherwise for feedback or carry out a comparative operation. The cutting machine 18 is placed downstream of the pair of rotors 47 of the encoder 17 in the transfer direction K of the wire 3. The cutting machine 18 includes the pair of cutting blades 48, 49. The pair of cutting blades 48, 49 is arranged in a vertical direction. The pair of cutting blades 48, 49 joins and detaches from one another at the same time vertically. As they approach each other, the pair of cutting blades 48, 49 captures and cuts the wire 3 transferred by the distribution rollers 12 between the cutting blades 48, 49. Then, the pair of cutting blades 48, 49 is detached from one another and detached from the wire 3. The controller 19 is a computer that includes a well-known ROM, a ROM, a CPU and the like. The controller 19 is connected to the distribution rollers 12, the encoder 17, the cutting machine 18, the coloring nozzles 31 and the like. By controlling them, the controller 19 controls the complete coloring apparatus 1. The controller 19 stores a predetermined pattern of the mark 6. When specific pulse signals are input from the encoder 17, specifically data corresponding to the transferred length of the wire 3, the controller 19 applies the voltage to the spiral 40 of a nozzle color predetermined pattern 31 during a predetermined time interval to cause the coloring nozzle 31 to discharge a specific amount of the coloring material on the wire 3. According to the predetermined stored pattern of the mark 6, the controller 19 makes the intervals shorter for the discharge when the transfer speed of the wire 3 becomes faster, and the longer intervals when the transfer speed of the wire 3 becomes slower. In this way, the controller 19 colors the wire 3 according to the pattern default stored. According to the length transferred in the wire 3 detected by the encoder 17, the controller 19 causes the coloring nozzle 31 to discharge a specific amount of the coloring material. Additionally, when the controller 19 judges that the wire 3 has moved to a predetermined length based on the data of the encoder 17, the controller 19 stops the dispensing roller 12 and causes the pair of cutting blades 48, 49 to approach each other and cut the wire 3. As shown in Figures 1 and 3, the coloring nozzle 31 includes a nozzle unit 52 and a liquid supply unit 53. As shown in Figure 4, the nozzle unit 52 includes a cylindrical nozzle body 34 (tube type), an insertion member 35 received by the nozzle body 34, an inlet tube 36, a nozzle member 54, a valve mechanism 38 and a nozzle cover 55. The insert member 35 is formed into a cylindrical (tube type) shape. The flow passage 39 through which the coloring material is passed is formed in the insertion member 35. The flow passage 39 is filled with the coloring material supplied from a source 32 of coloring material described below. The insertion member 35 is a receiver for receiving the liquid coloring material described in this description. The nozzle element 54 includes the first nozzle member 37, a second nozzle member 50, and a connection tube 51. The first nozzle member 37 is formed in a cylindrical shape and communicates with the flow passage 39. The first nozzle member 37 conducts the coloring material in the flow passage 39 to an exterior of the coloring nozzle 31. The inner diameter of the first nozzle member 37 is smaller than the inner diameter of the nozzle body 34, specifically , an outer diameter of the flow passage 39. The first nozzle member 37 is coaxial with the nozzle body 34. The first nozzle member 37 is made of stainless steel. The second nozzle member 50 is formed in a cylinder-like shape. The second nozzle member 50 is made of polyether etherketone (hereinafter referred to as "PEEK"). The outer diameter of the second nozzle member 50 is equal to that of the first nozzle member 37. In this way, the coloring material flows through the interior of the nozzle member 54, which communicates with the insertion member 35. Additionally, the inner diameter of the second nozzle member 50 is smaller than that of the first nozzle member 37. The second nozzle member 50 is coaxial to, and communicates with, the first nozzle member 37. The second nozzle member 50 is closer to the wire 3 than the first nozzle member 37. There is a watertight seal between the first nozzle member 37 and the second nozzle 50. The dye material flows through the first nozzle member 37 and the second nozzle member 50 in a longitudinal direction of the first nozzle member 37 indicated by an arrow Q. The arrow Q shows the direction of flow of the coloring material. Accordingly, a terminal wall 50a of the second nozzle member 50 near the first nozzle member 37 protrudes into an interior wall of the first nozzle member 37 from the interior wall of the first nozzle member 37. The end wall 50a is flat and orthogonal to the arrow Q. The end wall 50a is a part of a passage, and is formed between the first nozzle member 37 and the second nozzle 50. The connection tube 51 is formed in a form Cylindrical, and it is made of synthetic resin. An inner diameter of the connecting tube 51 is substantially equal to that of the first nozzle member 37 and the second nozzle 50. The connecting tube 51 is adapted with both outer walls of the first nozzle member 37 and the second nozzle 50, and connects the first nozzle member 37 and the second nozzle 50. Additionally, the connection tube 51 causes the second nozzle member 50 to be detachable from the first nozzle member 37. The valve mechanism 38 includes the scroll 40, the valve body 41 and the coil spring 42. The spiral 40 is formed out of the flow passage 39 and is embedded within the insertion member 35. An electric current is applied to the scroll 40 from the outside. The valve body 41 includes an electrically conductive body 43 and a valve 44. The conductive body 43 integrally includes a cylinder 45 and a disc 46 that continues to one end of the cylinder 45. The disc 46 of the conductive body 43 faces the end 37a of the bottom of the first nozzle member 37. The conductive body 43 is received in the flow passage 39 in a state that the longitudinal direction of the cylinder 45 is parallel to that of the nozzle body 34. The conductive body 43, specifically, the valve body 41 is formed movably in the longitudinal direction of the cylinder 45, specifically, the longitudinal direction of the nozzle body 34. The valve 44 is joined to the disc 46 of the conductive body 43. That is, the valve 44 is received in the insertion member 35. The valve member 44 faces the bottom end 37a of the first nozzle member 37. Since the valve 44 is attached to the disc 46 of the conductive body 43, the valve 44 is allowed to attach to the, or detaching from the bottom end 37a of the first nozzle member 37. The bottom end 37a of the first nozzle member 37 is a bottom end portion positioned in the insert member 35 as a receiver of the nozzle member 54. When the valve 44 is attached to the bottom end 37a of the first nozzle member 37, the coloring material in the flow passage 39 is prevented from entering the nozzle member 37, ie, the water tight seal is retained between the nozzle member 37. valve 44 and the bottom end 37a. When the valve member 44 detaches from the bottom end 37a of the first nozzle member 37, the coloring material is allowed to flow through the nozzle member 37 and the second nozzle member 50 to discharge to the outer surface 3a of the nozzle member 37. wire 3. In this manner, the valve member 44 is attached to or detached from the bottom end 37a between the opening position shown as a two-point chain line in Figure 4 and the closing position shown as a solid line at Figure 4. In the open position, the valve 44 detaches from the bottom end 37a, so that the coloring material can flow through the nozzle member 37 and the second nozzle member 50 to discharge to the surface outer 3a of the wire 3. In the closed position, the valve 44 is attached to the bottom end 37a, so that the coloring material can not flow through the nozzle member 37 to be discharged thereto. to the outer surface 3a in the wire 3. In this way, the valve 44 joins and detaches the bottom end 37a to control the discharge of the coloring material from the nozzle member 54. The coil spring 42 energizes the disk 46 in a direction such that the valve 44 is attached to the bottom end 37a of the first nozzle member 37. The nozzle cover 55 includes a cover body 56, of which an outer diameter is constant in an axial direction thereof, and an inner diameter changes in steps, a nozzle attachment member 57, and an inlet tube 58 for an cleaning fluid. The cover body 56 is attached to the unit body 30. The cover body 56 receives the nozzle unit 52. In the nozzle unit 52, the nozzle body 34 of the nozzle unit 52 is mounted in a passage 59. Additionally the inlet tube 36 of the nozzle unit 52 is placed upward, and the nozzle members 37, 50 they are placed down. In the cover body 56, a package is mounted 60 between the step 59 and the nozzle body 34 in the nozzle unit 52 to keep them water-tight. A space 61 is formed between the cover body 56 and the nozzle members 37, 51, specifically, the nozzle member 54. Space 61 is open below. Therefore, the nozzle cover 55 allows the dye material to be discharged through the nozzle member 54 which is deposited in the wire 3. A terminal wall 56a of the cover body 56 and an upper end wall 50b of the second member 50 of nozzle, both are towards the wire 3, they are arranged in the same plane. The end wall 56a of the cover body 56 facing the wire 3 is an upper end wall of the nozzle cover 55 facing the wire 3. The upper end wall 50b of the second nozzle member 50 is a top wall of the element. 54 of nozzle facing the wire 3. Additionally, an upper end portion 37b of the first nozzle member 37 near the wire 3 is an upper end portion of the nozzle member 54. Accordingly, the nozzle cover 55 covers at least the upper end portion 37b of the first nozzle member 37 as the upper end portion of the nozzle member 54. As shown in Figure 2, the nozzle fixing member 57 is mounted to the cover body 56 and fixes a nozzle unit 52 to the cover body 56. The nozzle fixing member 57 retains the cover body 56 and the nozzle unit 52 coaxially. The inlet tube 58 for the coloring liquid communicates with the space 61 formed between the nozzle member 54 and the cover body 56, and guides the coloring liquid to the space 61 from a source 62 of cleaning liquid, described below. As shown in Figures 2 and 3, the liquid supply unit 53 includes a plurality of sources 32 of coloring material, the source 62 of cleaning liquid as a coloring liquid supply member, and the source 33 of pressurized gas as a member of pressurization. Each source 32 of coloring material is a receiver for receiving the coloring material, and supplies the coloring material to the inlet tube 36 of the coloring nozzle 31. Each source 32 of coloring material corresponds to each coloring nozzle 31. The colors B of the The coloring material supplied to the coloring nozzle 31 can be different or the same between the sources 32 of coloring material. The source 62 of cleaning liquid is a receiver for receiving the cleaning liquid, and supplies the cleaning liquid to the inlet tube 58. The source of cleaning liquid 62 can be assembled to correspond to each coloring nozzle 31, or only to all coloring nozzles 31. The cleaning equipment means a liquid substance such as a solvent or a dispersion liquid, in the which can be dissolved or dispersed an organic substance for use in the industry that constitutes the coloring material. Preferably, the cleaning liquid is not volatile at room temperature. The source 33 of pressurized gas supplies the pressurized gas to each of the sources 32 of coloring material and the source 62 of cleaning liquid. Accordingly, the source 33 of pressurized gas pressurizes the dye material received in the sources 32 of coloring material and in the insertion members 35 of the coloring nozzles 31, and the cleaning liquid received in the source 62 of cleaning liquid and in the spaces 61 of the coloring nozzles 31. Since the source 33 of pressurized gas pressurizes the coloring material received in the sources 32 of coloring material and the insertion members 35 of the coloring nozzles 31, when the valve 44 breaks off from the bottom end 37a of the first nozzle member 37 in one of the coloring nozzles 31, the dye material received in the flow passage 39 is rapidly discharged through the nozzle member 37 and the second nozzle 50. A valve is mounted 63 between the source 62 of cleaning liquid and the inlet tube 58 of the nozzle cover 55 of each coloring nozzle 31. When the valve 63 is opened, the cleaning liquid is supplied from the source 62 of cleaning liquid to the space 61. When the valve 63 closes, the cleaning liquid stops from the supply to the space 61 from the source 62 of cleaning liquid. The coloring nozzle 31 having the constitution described above conducts the coloring material from the source 32 of coloring material to the flow passage 39 through the inlet tube 36. Then, with the energizing force of the spring 42 spirally and without applying voltage to the spiral 40, the valve 44 is joined to the bottom end 37a of the first nozzle member 37, and the coloring material is received in the flow passage 39. Additionally, for example, before coloring the wire 3, the coloring nozzle 31 opens the valve 63 and supplies the cleaning liquid received in the source 62 of cleaning liquid to the space 61. The cleaning liquid supplied to the space 61 is not leakage down from the lower part of the cover body 56 due to, for example, the surface tension of cleaning liquid, and the space between the nozzle member 54 and the cover body 56 is gradually filled with the cleaning liquid.

As shown in Figure 6, after the space 61 is filled with the cleaning liquid, the cleaning liquid leaks out of the cover body 56 through a lower opening formed in a lower part of the cover body 56. Then, the cleaning liquid dissolves or disperses the coloring material which deposits in and solidifies in the nozzle member 54, particularly in an upper end wall 50b and a surface of the upper end portion 37b, and removes the coloring material from the upper terminal wall 50b and the surface of upper terminal portion 37b. For this purpose, the cleaning liquid is a remover liquid for removing the coloring material that is deposited in the nozzle element 54 of the nozzle member 54. In this way, the nozzle member 54 is cleaned. When the cleaning of the nozzle member 54 is completed, the valve 63 is closed. Accordingly, the supply of cleaning liquid from the source 62 of cleaning liquid to the space 61 is stopped. Then, the cleaning liquid supplied to the interior of the The nozzle cover 55 of the cleaning liquid source 62 is retained in the space 61 between the nozzle cover 55 and the nozzle member 54 by the surface tension of cleaning liquid, and does not leak any longer from the cover 55. nozzle Then, as shown in Figure 7, a surface (interface) T of cleaning liquid in the space 61, specifically, the interior of the nozzle cover 55 and the end wall 56a and the top end wall 50b are arranged in the same plane. Then, in the coloration nozzle 31, when electric current is applied to the spiral 40, the valve 44 attached to the disc 46 is released from the bottom end 37a of the first nozzle member 37 against the energizing force of the spiral spring 42. Then, the coloring material stored in the flow passage 39 flows through the interior of the first nozzle member 37 and the second nozzle member 50 along the arrow Q. Then, the coloring nozzle 31 discharges the coloring material from the second nozzle 50. The electric current is applied to the spiral 40 for a predetermined time according to an order from the controller 19. Therefore, as the cleaning liquid supplied to the nozzle cover 55 from the source 62 of cleaning liquid is retained inside the nozzle cover 55 by the surface tension, a specific amount of the coloring material is discharged through the nozzle element 54 on the outer surface 3a of the wire 3. When the coloring apparatus 1 has the constitution described above forms the mark 6 on the outer surface 3a of the wire 3, specifically, colors the outer surface 3a of the wire 3, p first the guide roller 11 is mounted on the frame 10. After the cutting blades 48, 49 are separated from one another, the wire 3 wound on the guide roller 11 is passed through the straightening unit 13, the slack absorption unit 14, the coloring unit 15 and the duct 16 sequentially and captured between the pair of distribution rollers 12. Then, each of the coloring nozzles 31 is attached to a predetermined position of the corresponding unit body 30 of the coloring unit 15, and is connected to the corresponding source 32 of coloring material and the source 62 of cleaning liquid. Then, the source 33 of pressurized gas is connected to the sources 32 of coloring material and the source 62 of cleaning material. Then, the suction member sucks the gas into the conduit 16. Then, by rotating the distribution rollers 12, the wire 3 is pulled out of the guide roller 11, and transferred in the longitudinal direction of the wire 3. Substantially , the straightening unit 13 gives friction due to the first energizing force Hl to retain the wire of 3 in tension. So, the air cylinder 27 energizes the movable roller 26, specifically, the wire 3 with the second energizing force H2. Then, as described above, the coloring material is supplied to the flow passage 39 of the coloring nozzle 31 from the sources 32 of coloring material and the cleaning liquid is supplied to the space 61 from the source 62 of cleaning liquid. Then, when pulse signals are input in a specific pattern from the encoder 17 to the controller 19, the controller 19 applies the current for a specific time in a specific interval to the spiral 40 of the predetermined coloring nozzle 31. Therefore, the coloring nozzle 31 discharges a specific amount of the coloring material on the outer surface 3a of the wire 3. Then, the solvent or the liquid dispersion evaporates from the coloring material deposited on the outer surface 3a of the wire 3, so that the outer surface 3a of wire 3 is dyed with dye or coated with pigment. The suction member sucks the solvent or evaporated liquid dispersion of the coloring material deposited on the outer surface 3a of the wire 3 through the conduit 16. In this way, the surface 3a of the wire 3 is colored. When it is judged that a specific length of the wire 3 is distributed according to the data of, for example, the encoder 17, the controller 19 stops unwinding the distribution roller 12. Then, the wire 3 hangs particularly between the pair of guide rollers 24 of the slack absorption unit 14, and the movable roller 26 energized in the second energizing force H2 is transferred to the position shown as a two-point chain line. in Figure 1. Then, the extendable rod 29 of the air cylinder 27 of the slack absorption unit 14 is extended. In this way, the slack absorption unit 14 absorbs the lack of the wire 3. Then, the pair of cutting blades 48, 49 approaches each other and cuts the wire 3. In this way, the wire 3 having a mark 6 on the outer surface 3a as shown in Figure 5.

When a specific amount of the liquid coloring material is discharged through the coloring nozzle 31 on the outer surface 3a of the wire 3, the coloring material flowing through the first nozzle member 37 and the second nozzle member 50 throughout of the axis R and the arrow Q collides partially with the terminal wall 50a of the second nozzle 50. Then, a part of the coloring material that collides with the end wall 50a generates a vortex shown as an arrow S in Figure 7 to agitate the material Colorant. Therefore, the concentration of the coloring material throughout the interior of the second nozzle 50 is kept uniform. In the case that a specific amount of the liquid coloring material is discharged through the coloring nozzle 31 on the outer surface 3a of the wire 3, when the coloring material enters the first nozzle member 37 through the flow passage 39, the pressure of the coloring material increases. Then, the pressure of the coloring material is substantially constant in the first nozzle member 37. When the coloring material collides partially with the terminal wall 50a, it drastically increases the pressure of the coloring material. After the coloring material is discharged through the second nozzle member 50 on the outer surface 50a of the wire 3, the pressure of the coloring material dramatically decreases. In the case that a specific amount of the liquid coloring material is discharged through the coloring nozzle 31 on the outer surface 3a of the wire 3, when the coloring material enters the first nozzle member 37 through the flow passage 39, decreases the speed of the coloring material that flows. Then, the velocity of the flowing dye material is substantially constant in the first nozzle member 37, and gradually decreases towards the second nozzle 50. When the dye material collides partially with the end wall 50a, the speed of the dye material which increases with the dye is increased dramatically. flowing. Then, when the coloring material is discharged through the second nozzle member 50 on the outer surface 3a of the wire 3, the velocity of the flowing coloring material is kept high. In this way, when the coloring material enters the second nozzle 50, the pressure and the flow rate of the coloring material are drastically increased. Then, the fast high-pressure liquid coloring material is discharged onto the outer surface 3a of the wire 3. According to this embodiment, the cleaning liquid is supplied to the nozzle cover 55 covering at least the upper terminal part 37b of the nozzle element 54. Additionally, the cleaning liquid is maintained in the nozzle cover 55 by the surface tension thereof. Accordingly, the cleaning liquid constantly contacts the upper end portion 37b of the nozzle member 54. Therefore, the cleaning liquid rapidly removes the coloring material close to being deposited in the second nozzle 50, particularly the upper terminal part 37b, from the surface of the nozzle member 54. Therefore, the dye material is prevented from depositing on and solidifying in the nozzle member 54 when the wire 3 is colored. Since the dye material is prevented from depositing on and solidifying in the nozzle member 54, it is reliably discharging a specific amount of the coloring material through the nozzle member 54 onto the outer surface 3a of the wire 3. Additionally, since coloring material is prevented from depositing in the nozzle member 54, the material is prevented from dye is deposited on the nozzle element 54 affecting a discharge direction of the discharged dye material. Therefore, a specific amount of coloring material is allowed to be reliably discharged onto a desired position of the outer surface 3a of the wire 3. Accordingly, the desired position (point 7) of the outer surface 3a of the wire 3 is colored in a desired color in a specific area (size). Since the end wall 56a of the nozzle cover 55 and the upper end wall 50b of the nozzle member 54 are arranged in the same plane, the cleaning liquid is retained in the nozzle cover 55 by the surface tension thereof of a Such that the surface thereof, the end wall 56a of the nozzle cover 55, and the upper end wall 50b of the nozzle member 54 are arranged in the same plane. Therefore, the cleaning liquid is prevented from interfering with the dye material discharged through the nozzle member 54, and affects the discharge direction of the discharged dye material. Therefore, a specific amount of the coloring material is more reliably discharged onto the desired position of the outer surface 3a of the wire 3, and is retained in the colored position (point 7) in a desired colored area (size) of the outer surface 3a of the wire 3. The coloring material collides with the terminal wall 50a of the second nozzle member 50 and is agitated. Since the first nozzle member 37 and the second nozzle member 50 are arranged coaxially, and the end wall 50a is arranged perpendicular to the arrow Q, the coloring material is also reliably agitated. Therefore, the concentration of the dye or the pigment in the coloring material remains uniform. Therefore, an extremely concentrated coloring material in nozzle element 54 is prevented from depositing from the coloring nozzle 31. When the coloring material penetrates into the interior of the second nozzle member 50 from the first nozzle member 37, it is pressurized drastically the coloring material. Therefore, the coloring material is vigorously discharged through the second nozzle member 50 onto the outer surface 3a of the wire 3. Therefore, the coloring material is prevented from depositing in the second nozzle 50. Since it is prevented from the dye material is deposited in the second nozzle 50, a specific amount of the dye material is reliably discharged through the second nozzle member 50 on the outer surface 3a of the wire 3. Additionally, since the material is prevented from depositing dye in the second nozzle 50, the dye material deposited in the second nozzle member 50 is prevented from affecting a discharge direction of the discharged dye material. Therefore, a specific amount of the coloring material is reliably discharged onto a desired position of the outer surface 3a of the wire 3. Therefore, the desired position of the outer surface 3a of the wire 3 is colored in the desired color, and it remains in a desired area (size). While the wire 3 is directed in the longitudinal direction of the wire 3 relative to the coloring nozzle 31, the coloring nozzle 31 discharges a specific amount of the coloring material onto the wire 3. In this way, the coloring nozzle 31 color the wire 3, when the wire is directed in relation to the coloring nozzle 31. Therefore, the wire 3 does not need to stop for coloring, so that the working capacity is not reduced. Additionally, when the wire 3 is directed relative to the coloring nozzle 31, the coloring nozzle 31 discharges a specific amount of the coloring material towards the wire 3. Therefore, they can continuously color the optional positions of the wire 3. The encoder 17 measures the data corresponding to the transferred length of the wire 3 and the controller 19 controls the coloring nozzle 31 according to the length transferred in the wire 3. Therefore, the controller 19 shortens the time interval of the discharge of the coloring material from the coloration nozzle 31 when the transfer rate in the wire 3 is increased, when the controller 15 lengthens a time interval of the discharge of the coloring material from the coloring nozzle 31 when the transfer rate of the wire 3 is decreased. In this way, if the transfer speed of the wire 3 changes, the controller 19 it can keep the dots of the coloring materials deposited on the outer surface 3a of the wire 3 at specific intervals. In this way, if the transfer speed of the wire 3 changes, the controller 19 can deposit its coloring materials on the outer surface 3a of the wire 3 according to a predetermined pattern. Specifically, even if the transfer rate of the wire 3 changes, the controller 19 may color the wire 3 according to a predetermined pattern, In the embodiment described above, the first nozzle element 37 and the second nozzle member 50 are separated from each other, however, according to the present invention, the first nozzle element 37 and the second nozzle member 50 can be integrate with each other In the present invention, as the coloring material or coating material, various materials may be used, such as acrylic coating material, ink (dye or pigment) or UV ink. In the embodiment described above, the electric wire 3 is described which constitutes a wire harness arranged in a vehicle. However, the wire 3 not only applies to a vehicle, but also applies to various electronic devices such as a computer, or several electrical machines. In the embodiment described above, the coloring nozzle 31 colors the outer surface 3a of the wire 3, however, the coloring nozzle 31 can color other miscellaneous objects. The preferred embodiments mentioned above are described to aid in understanding the present invention and variations may be made by one skilled in the art without departing from the spirit and scope of the present invention.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, as claimed in claim 1, since the upper end wall of the nozzle element constantly contacts the cleaning liquid, the dye material near to being deposited in particular at the upper end of the nozzle element is immediately removed from the upper end wall of the nozzle element. Therefore, the coloring material is prevented from depositing and solidifying in the nozzle element during a coloring process. Since the coloring material is prevented from solidifying as described above, a specific amount of the coloring material can be reliably discharged onto the outer surface of the object. Additionally, since the coloring material is prevented from depositing in the nozzle element, the coloring material deposited on the nozzle element is prevented from affecting a discharge direction of the discharged coloring material. Therefore, a specific amount of the dye material is allowed to discharge reliably at a desired position on the outer surface of the object. Accordingly, the desired position of the interior surface of the object is colored in a desired color in a specific area (size). According to the present invention as claimed in claim 2, the cleaning liquid is retained in the nozzle cover in a manner such that the surface thereof, the terminal wall of the nozzle cover, and the upper terminal wall of the Nozzle element are arranged in the same plane. Therefore, the cleaning liquid is prevented from interfering with the dye material discharged through the nozzle element, and does not affect the discharge direction of the dye material discharged. Therefore, a specific amount of the dye material is more reliably discharged onto the desired position of the outer surface of the object, and the discharged dye material is maintained in a desired, colored area (size) of the outer surface of the object.

Claims

CLAIMS 1. Coloring nozzle by discharging a specific quantity of liquid coloring material onto an exterior surface of an object and depositing the discharged coloring material on the exterior surface of the object, the coloring nozzle comprising: a receiver for receiving coloring material; a pressurization unit for pressurizing the coloring material of the receiver; a nozzle element that is formed in a cylinder-like shape, through which the coloring material flows, the nozzle element communicating with the receiver; a valve that is mounted at a bottom end of the nozzle member deposited within the receiver, and is allowed to join and detach the end of the bottom to discharge the coloring material through the nozzle element; a nozzle cover covering at least one upper end of the nozzle member, and allowing the coloring material to be discharged through the nozzle member that is deposited through the object; and a cleaning liquid supunit deposited in the nozzle cover to supa cleaning liquid, the cleaning liquid used to remove the coloring material that is deposited on the nozzle element, so under a condition that the cleaning liquid supplied from the cleaning liquid supunit to the nozzle cover is maintained in the nozzle cover by the surface tension thereof, the coloring nozzle discharges the coloring material through the nozzle element on the nozzle cover. object.
2. Coloring nozzle according to claim 1, wherein a terminal wall of the nozzle cover and an upper end wall of the nozzle element, both facing the object, are arranged in the same plane.