CN218906698U - Ink jet head and ink jet device for yarn dyeing - Google Patents

Abstract

The utility model discloses an ink-jet head and an ink-jet device for yarn dyeing, and relates to the technical field of ink-jet printing and dyeing. The ink jet head comprises a plurality of needle assemblies; the needle assembly includes: a metal sheet; the spray needle is positioned at the edge of the metal sheet and parallel to the metal sheet and is used for circulating dye liquor; the piezoelectric resonator is positioned on the side surface of the metal sheet and used for driving the metal sheet to vibrate under the control of the driving electric signal so as to make the spray needle vibrate and accordingly shake out dye liquor in the spray needle; the spray needle assemblies are distributed in an annular array of the yarn winding shaft, and the liquid outlet end of the spray needle in each spray needle assembly points to the yarn winding shaft; the liquid outlet end of the spray needle is provided with an inclined end face. The ink jet head is used for yarn dyeing, and is high in dye utilization rate and printing and dyeing efficiency.

Description

Ink jet head and ink jet device for yarn dyeing

Technical Field

The application relates to the technical field of ink-jet printing and dyeing, in particular to an ink-jet head and an ink-jet device for yarn dyeing.

Background

The traditional yarn dyeing generally adopts a manner of filling the cone yarn into a cage for soaking and dyeing, the whole dyeing process needs to be soaked for a plurality of times to ensure that the yarns in the inner layer and the outer layer of the cone are uniformly dyed, a large amount of water is consumed for soaping after dyeing is finished to remove floating color, and a large amount of waste liquid is discharged to pollute the environment. In fact, the printing industry mostly requires consuming large amounts of water and producing large amounts of wastewater. The discharged wastewater contains a large amount of dye and chemical auxiliary agents, which causes serious pollution to the environment.

The textile printing and dyeing is carried out by the ink-jet printing technology, so that not only can a large amount of waste water be avoided, but also the printing and dyeing process flow can be shortened, and the printing and dyeing efficiency can be improved. However, the current inkjet heads are only suitable for printing patterns, and cannot dye yarns.

Disclosure of Invention

The application solves the problems of serious water pollution and low dyeing efficiency existing in the traditional yarn dyeing by providing the ink jet head and the ink jet device for yarn dyeing. The ink jet head is used for yarn dyeing, and is high in dye utilization rate and printing and dyeing efficiency.

In order to achieve the above purpose, the present utility model mainly provides the following technical solutions:

the application provides an ink jet head for yarn dyeing, comprising a plurality of needle assemblies;

the needle assembly includes:

a metal sheet;

the spray needle is positioned at the edge of the metal sheet and parallel to the metal sheet and is used for circulating dye liquor;

the piezoelectric resonator is positioned on the side surface of the metal sheet and used for driving the metal sheet to vibrate under the control of the driving electric signal so as to make the spray needle vibrate and accordingly shake out dye liquor in the spray needle;

the spray needle assemblies are distributed in an annular array of the yarn winding shaft, and the liquid outlet end of the spray needle in each spray needle assembly points to the yarn winding shaft;

the liquid outlet end of the spray needle is provided with an inclined end face.

Preferably, in each needle assembly, a straight line passing through the center of the inclined end face of the needle liquid outlet end and perpendicular to the inclined end face perpendicularly intersects the yarn shaft.

Preferably, the plurality of needle assemblies are arranged in one or more sets of annular arrays;

each group of annular arrays comprises at least two needle assemblies;

the needle assemblies in each group of annular arrays are annularly and equally arranged around the yarn shaft on a plane perpendicular to the yarn shaft;

in the same annular array, straight lines passing through the centers of the inclined end faces of the liquid outlet ends of the spray needles and perpendicular to the inclined end faces intersect at the same point on the yarn shaft;

when the plurality of needle assemblies are arranged in a plurality of groups of annular arrays, the plurality of groups of annular arrays are arranged along the yarn shaft.

Preferably, in the same annular array, the distances of the dye solution falling from the liquid outlet ends of the spray needles to the surface of the yarn are equal.

Preferably, the plurality of sets of annular arrays are equally spaced along the yarn axis.

Preferably, the number of needle assemblies is the same and the positions of the needle assemblies distributed annularly around the yarn collar are the same in the different annular arrays.

Preferably, the inkjet head further comprises a fixing assembly for fixing the plurality of needle assemblies to form an annular array;

the fixed assembly comprises an annular mounting plate and a plurality of movable adjusting columns;

each movable adjusting column is connected with a spray needle assembly respectively, the movable adjusting columns are mounted on the annular mounting plate to form an annular array, and the movable adjusting columns can move along the radial direction of the annular mounting plate.

Preferably, the fixing assembly further comprises an annular rotating disc, the annular rotating disc and the annular mounting disc are coaxially arranged, and the annular rotating disc can coaxially rotate relative to the annular mounting disc;

the inner side wall of the annular rotating disc is provided with annular sawtooth-shaped grooves;

an annular boss coaxial with the annular mounting disc is arranged on the end face of the annular mounting disc, a plurality of mounting holes are formed in the side wall of the annular boss, and the mounting holes are used for mounting the movable adjusting column;

the movable adjusting column comprises a connecting main column, a roller device arranged at the top end of the connecting main column and a spring sleeved on the connecting main column, and the bottom end of the connecting main column is connected with the spray needle assembly;

the connecting main column of the movable adjusting column is inserted into a mounting hole of an annular boss on the annular mounting disc, a needle assembly connected with the bottom end of the connecting main column is positioned at the inner side of the annular boss, and a spring sleeved on the connecting main column is clamped between the roller device and the outer wall of the annular boss; the rollers in the roller device are pressed on the serrated groove walls of the annular rotating disc under the action of the elasticity of the springs; when the annular rotating disc rotates relative to the annular mounting disc, the rollers in the roller device roll on the serrated groove walls of the annular rotating disc, and meanwhile, the movable adjusting column moves in the radial direction of the annular mounting disc.

Preferably, an annular groove is formed in the outer circumferential surface of the annular mounting plate;

a plurality of uniformly distributed rotating wheels are arranged on the end face of the annular rotating disc, facing the annular mounting disc, and are positioned in annular grooves on the annular mounting disc; when the annular rotating disc rotates relative to the annular mounting disc, a plurality of rotating wheels on the annular rotating disc can roll along the annular groove.

Preferably, the movable adjusting column is movably connected with the spray needle assembly;

the edge of the metal sheet is provided with a pin bolt parallel to the spray needle, the bottom end of the movable adjusting column is provided with a sleeve which is matched with the pin bolt and is provided with an opening on the side surface, and the pin bolt is inserted into the sleeve and can move along the inner wall of the sleeve; and two ends of the pin bolt are respectively provided with an external thread and a nut matched with the external thread, and the nut is used for keeping the pin bolt and the sleeve relatively fixed.

The application also provides an ink jet device comprising one or more groups of the ink jet heads.

One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:

the application provides an inkjet head sets up a plurality of needle subassemblies into the annular distribution of winding yarn spool, can spray the dye liquor to yarn surface from different directions, especially to the great stranded yarn of diameter that the collection formed of twisting of many single-stranded yarns, can improve the spray dyeing homogeneity.

The ink jet head provided by the application can replace the traditional yarn dyeing, and directly sprays dye liquor onto the yarn for infiltration dyeing. The whole dyeing process does not need to dip-dye the yarn with a large amount of dye liquor, and can uniformly dye the yarn by using a small amount of dye liquor by balancing the feeding speed of the yarn and the spraying frequency and the liquid amount of the spray head, so that the condition that chromatic aberration exists in the inner layer and the outer layer of a bobbin in the traditional dyeing can not occur, the dye can be fully utilized, the dye utilization rate can be improved, and the dyeing uniformity can be improved. In addition, the yarn can be dyed uniformly by spraying a proper amount of dye liquor through the ink-jet head, a soaping step for washing off floating color can be omitted, and the water consumption and the waste water output are reduced. When the dye liquor is mixed with the color fixing agent, simultaneous dyeing and color fixing can be realized, and the yarns immersed in the dye liquor can be directly subjected to post-treatment such as drying, so that dyeing procedures are saved.

Drawings

FIG. 1 is a schematic diagram of a needle assembly of an ink jet head according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a needle assembly of an ink jet head according to another embodiment of the present disclosure;

FIG. 3 is a schematic diagram showing the arrangement of the needle assemblies in the ink jet head according to one embodiment of the present disclosure;

FIG. 4 is a schematic view of an arrangement of needle assemblies in an ink jet head according to another embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a piezoelectric resonator in an ink jet head according to another embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of an ink jet head according to another embodiment of the present disclosure;

FIG. 7 is a schematic view of an ink jet head according to another embodiment of the present disclosure;

FIG. 8 is a schematic view of a partial structure of an inkjet head according to an embodiment of the present disclosure;

FIG. 9 is a schematic view of a partial structure of an ink jet head according to another embodiment of the present disclosure;

fig. 10 is a schematic partial structure of an inkjet head according to another embodiment of the present disclosure.

Detailed Description

In order to further describe the technical means and effects adopted for achieving the preset aim of the utility model, the following detailed description refers to the specific implementation, structure, characteristics and effects according to the application of the utility model with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

The present application provides an inkjet head for yarn dyeing, as shown in fig. 1 and 2, comprising a plurality of needle assemblies 1;

the needle assembly includes:

a metal sheet 12;

the spray needle 13 is positioned at the edge of the metal sheet and parallel to the metal sheet and is used for circulating dye liquor;

the piezoelectric resonator 11 is positioned on the side surface of the metal sheet and is used for driving the metal sheet to vibrate under the control of the driving electric signal so as to make the spray needle vibrate and thereby shake out the dye liquor in the spray needle;

as shown in fig. 3 and 4, the plurality of needle assemblies 1 are distributed in an annular array around the yarn spool 2, and the liquid outlet end of the needle in each needle assembly is directed to the yarn spool; the liquid outlet end of the spray needle is provided with an inclined end face.

In the present application, the plurality of needle assemblies means two or more needle assemblies. Each group of the needle assemblies comprises a metal sheet, a needle and at least one piezoelectric resonator. In this application, the metal sheet 12 may be a metal sheet of any shape, such as octagonal, circular, etc.

In the application, the spray needle 13 is of a thin tubular structure with a hollow inside, one end of the spray needle is a liquid outlet end, and the other end of the spray needle is a liquid inlet end; the liquid inlet end of the spray needle is connected with the ink path, so that the dye liquid enters the spray needle. When the spray needle vibrates, the surface tension of dye liquor in the spray needle needs to be overcome at the liquid outlet end, so that the dye liquor can be sprayed out smoothly, and the liquid outlet end of the spray needle needs to be set to be an inclined end face, namely, the end face of the liquid outlet end and the outer wall of the spray needle form an oblique angle of other than 90 degrees. Specifically, the needle is fixedly connected with the edge of the metal sheet, for example, the needle is connected with the metal sheet in a welding mode.

Specifically, as shown in fig. 5, the piezoelectric resonator 11 includes: a lower electrode layer 112, a piezoelectric ceramic layer 111, and an upper electrode layer 113 laminated in this order from the side close to the metal sheet side away from the metal sheet side; the lower electrode layer and the upper electrode layer are respectively made of coating materials such as silver which are respectively arranged at two sides of the piezoelectric ceramic layer. Specifically, the positive electrode and the negative electrode of the driving electric signal may be provided to the lower electrode layer and the upper electrode layer of the piezoelectric resonator, respectively, so that the piezoelectric resonator vibrates the metal sheet under the control of the driving electric signal. As shown in fig. 2, the piezoelectric resonators 11 may be provided in one or two groups, and when the piezoelectric resonators are provided in two groups, they are provided on both sides of the metal sheet 12, respectively. Compared with the method that the piezoelectric resonators are arranged on one side of the metal sheet, the two groups of piezoelectric resonators can enable the vibration amplitude and the vibration force of the metal sheet to be larger, so that the vibration amplitude of the needle is larger, the vibration speed is higher, the dye liquor stored in the steel needle can overcome the surface tension of the liquid outlet of the steel needle more easily, and can be dropped down, on the basis, the inner diameter of the needle is increased, or the needle can still smoothly discharge liquid when the dye liquor with high viscosity is adopted, so that the liquid discharge amount of the needle in single vibration can be increased, and particularly for yarns with large diameters, the yarns can be fully soaked in the dye liquor, and uneven dyeing is prevented.

According to the device, the plurality of spray needle assemblies are distributed in the shape of the ring around the yarn spool, the dye liquor can be sprayed on the surface of the yarn from different directions, and particularly, the plurality of strands of yarns with larger diameters formed by twisting and gathering the single strands of yarns can be sprayed and dyed uniformly.

The ink jet head provided by the application can replace the traditional yarn dyeing, and directly sprays dye liquor onto the yarn for infiltration dyeing. The whole dyeing process does not need to dip-dye the yarn with a large amount of dye liquor, and can uniformly dye the yarn by using a small amount of dye liquor by balancing the feeding speed of the yarn and the spraying frequency and the liquid amount of the spray head, so that the condition that chromatic aberration exists in the inner layer and the outer layer of a bobbin in the traditional dyeing can not occur, the dye can be fully utilized, the dye utilization rate can be improved, and the dyeing uniformity can be improved. In addition, the yarn can be dyed uniformly by spraying a proper amount of dye liquor through the ink-jet head, a soaping step for washing off floating color can be omitted, and the water consumption and the waste water output are reduced. When the dye liquor is mixed with the color fixing agent, simultaneous dyeing and color fixing can be realized, and the yarns immersed in the dye liquor can be directly subjected to post-treatment such as drying, so that dyeing procedures are saved.

Preferably, in each needle assembly 1, a straight line passing through the center of the inclined end face of the needle liquid outlet end and perpendicular to the inclined end face perpendicularly intersects the yarn shaft. Through the arrangement, the direction of spraying the dye liquor from the liquid outlet end of the spray needle is vertical to the yarn, so that a better dip dyeing effect is obtained when the dye liquor falls onto the surface of the yarn, and dyeing precision and dyeing uniformity can be improved.

Preferably, as shown in fig. 3 and 4, the plurality of needle assemblies 1 are arranged in one or more groups of annular arrays; each group of annular arrays comprises at least two needle assemblies; the needle assemblies in each set of annular arrays are arranged in an annular equally spaced relationship about the yarn axis in a plane perpendicular to the yarn axis. Through this setting, can make the interval between the adjacent needle in every group needle subassembly annular array equal to guarantee that the dye that the needle in same annular array jetted out distributes evenly on the yarn, in order to improve dyeing homogeneity.

In the same annular array, straight lines passing through the centers of the inclined end faces of the liquid outlet ends of the spray needles and perpendicular to the inclined end faces intersect at the same point on the yarn shaft. Through the arrangement, when the spray needles in the same annular array vibrate at the same time, the sprayed dye liquor can be collected on the same position of the yarn, so that the infiltration sufficiency of the yarn is improved, and the yarn is uniformly dyed.

Specifically, when the plurality of needle assemblies 1 are arranged in a plurality of sets of annular arrays, the plurality of sets of annular arrays are arranged along the yarn shaft. When the ink jet head only comprises a group of annular arrays, the ink jet head is only suitable for single-color dyeing of single-strand yarns and stacking dyeing of the same color, and when the yarns are multi-strand yarns with larger diameters formed by twisting and assembling a plurality of single-strand yarns, the liquid outlet quantity of the spray needles of the group of annular arrays is difficult to meet the infiltration of the multi-strand yarns, so that the problems of miss dyeing or uneven dyeing can be caused. The ink jet head can improve the jet dyeing quantity and the jet dyeing uniformity by arranging the plurality of groups of annular arrays, and the plurality of groups of annular arrays can realize single-color dyeing of single-strand or multi-strand yarns, can control different spray needles to spray different dye solutions, and can realize multi-color dyeing of the single-strand or multi-strand yarns, such as sectional different-color fancy space dyeing and different-color stacking dyeing.

Preferably, in the same annular array, the distances of the dye solution falling from the liquid outlet ends of the spray needles to the surface of the yarn are equal. Through this setting, can make the time synchronization that the dye liquor of the simultaneous blowout of needle in same needle subassembly annular array falls to the yarn, avoid appearing the dye liquor and fall into the inconsistent and influence dyeing uniformity of position in yarn advancing process.

Specifically, the spacing between adjacent annular arrays can be adjusted according to actual needs. Preferably a plurality of sets of annular arrays are equally spaced along the yarn axis. Through the arrangement, the yarns can be simultaneously dyed in multiple sections or multiple colors, and the device is suitable for single-color dyeing, fancy space dyeing and multi-color stacking dyeing, and can improve the jet dyeing efficiency.

Preferably, the number of needle assemblies is the same and the positions of the needle assemblies distributed annularly around the yarn collar are the same in the different annular arrays. Through this setting, can guarantee that the spray-dyeing effect is the same between the annular array of different needle subassembly, improve the spray-dyeing homogeneity when improving spray-dyeing efficiency.

Specifically, the above-described inkjet head further includes a fixing member for fixing the plurality of needle assemblies 1 to form an annular array.

As shown in fig. 6, the stationary assembly includes an annular mounting plate 32 and a plurality of moving adjustment posts 33; each of the movable adjustment columns 33 is connected to one of the needle assemblies 1, respectively, and a plurality of the movable adjustment columns are mounted on the annular mounting plate to form an annular array, and the movable adjustment columns are movable in a radial direction of the annular mounting plate.

Specifically, as shown in fig. 6 and 8, the above-mentioned stationary assembly further includes an annular rotating disk 31 coaxially disposed with the annular mounting disk, and the annular rotating disk is coaxially rotatable with respect to the annular mounting disk. An annular serration 312, preferably an inclined triangular serration, is provided on the inner side wall of the annular rotating disc 31. As shown in fig. 6 and 9, an annular boss 321 coaxial with the annular mounting plate is provided on the end surface of the annular mounting plate 32 facing the annular rotating plate, and a plurality of mounting holes 322 for mounting the movement adjusting post 33 are provided on the side wall of the annular boss. As shown in fig. 10, the movement adjusting column 33 includes a connection main column 330, a roller device 331 provided at the top end of the connection main column, and a spring 332 sleeved on the connection main column, the bottom end of the connection main column being connected with the needle assembly 1.

As shown in fig. 6, a connecting main column 330 of the movable adjusting column is inserted into a mounting hole 322 of an annular boss of the annular mounting plate, a needle assembly 1 connected with the bottom end of the connecting main column is positioned inside the annular boss 321, and a spring 332 sleeved on the connecting main column is clamped between a roller device 331 and the outer wall of the annular boss 321; the roller in the roller device 331 is pressed against the wall of the serrated groove 312 of the annular rotating disc under the action of the elasticity of the spring; when the annular rotating disc rotates relative to the annular mounting disc, the rollers in the roller device roll on the serrated groove walls of the annular rotating disc, and meanwhile, the movable adjusting column moves in the radial direction of the annular mounting disc. By this arrangement, it is possible to adjust the distance of the needle from the yarn surface. When the yarn is dyed, the yarn is arranged on the axial direction of the annular mounting disc, the plurality of needle assemblies are mounted in the mounting holes of the annular boss through the movable adjusting columns, and the movable adjusting columns are uniformly distributed into an annular shape, so that the needle assemblies can form an equally-spaced annular array.

Specifically, as shown in fig. 10, the roller device 331 includes a supporting platform 341 connected to the top end of the main column, two roller support columns 342 provided on the supporting platform, and a roller 343 in the middle of the two roller support columns.

Preferably, the plurality of mounting holes 322 on the side wall of the annular boss 321 are distributed at equal intervals; through this setting, can guarantee to install the removal adjusting column evenly distributed in the mounting hole, and then can guarantee that the needle subassembly can be equidistant annular array and distribute.

Preferably, as shown in fig. 7, a limiting protrusion 323 is provided at a mounting hole located at an inner side wall of the annular boss 321 for limiting the movement of the movement adjusting column only in an inner diameter direction of the annular boss.

Preferably, as shown in fig. 7 and 9, an annular groove 324 is provided on the outer circumferential surface of the annular mounting plate 32; the end surface of the annular rotating disc 31 facing the annular mounting disc 32 is provided with a plurality of rotating wheels 311 which are uniformly distributed, and the rotating wheels 311 are positioned in annular grooves 324 on the annular mounting disc 32; when the annular rotating disc rotates relative to the annular mounting disc, a plurality of rotating wheels on the annular rotating disc can roll along the annular groove. Through this setting, can guarantee that annular mounting disc and annular rolling disc's axial is unanimous, take place the skew and influence the regulation to needle subassembly position when preventing to rotate.

Preferably, the rim of the annular mounting plate 32 is also provided with vise means for securing the annular rotating plate 31.

Specifically, as shown in fig. 6, 7 and 9, the vise device includes an L-shaped link 325, a clamp block 326 and a bolt handle 327, one side of the L-shaped link 325 is provided with a threaded through hole and is connected with the edge of the annular mounting plate 32, the other side extends along the axial direction of the annular mounting plate 32 and toward the annular rotating plate 31 side, and the end is provided with a clamp portion toward the annular rotating plate 31; the clamping block 326 is arranged between the clamping part and the threaded through hole of the L-shaped connecting piece, and forms a U-shaped clamping groove with the clamping part; the edge of the annular rotating disc 31 falls into the U-shaped clamping groove and is attached to the clamping part of the L-shaped connecting piece 325; the bolt handle 327 is provided with external threads and is matched with the threaded through hole on the L-shaped connecting piece; the bolt handle 327 passes through the threaded through hole and is movably connected with the clamping block 326; when the bolt handle 327 is rotated, the clamping block 326 moves along the axial direction of the annular mounting plate, so that the annular rotating plate in the U-shaped clamping groove can be pressed or loosened, and the fixed and rotatable states of the annular rotating plate are realized. The annular rotating disc is tightly pressed in the yarn dyeing process, so that the annular rotating disc can be prevented from rotating relative to the annular mounting disc; when the annular rotating disc is rotatable, the distance between the needle assembly and the yarn can be adjusted. Specifically, the bolt handle 327 is rotatably movably connected with the clamping block 326, for example, a ball groove is formed on the clamping block, and the tail end of the bolt handle is a ball joint. Specifically, the clamping block 326 and the L-shaped connecting piece 325 may be slidably connected, for example, a strip-shaped clamping groove is formed on the L-shaped connecting piece, and a clamping connector matched with the strip-shaped clamping groove is formed at the bottom of the clamping block.

Preferably, the movable adjusting column is movably connected with the needle assembly, so that the needle assembly can be detached and the relative position between the needle and the surface of the yarn can be adjusted, and a better dyeing effect can be obtained.

Specifically, as shown in fig. 10, the edge of the metal sheet 1 is provided with a pin 333 parallel to the needle, the bottom end of the movable adjusting column, i.e. the bottom end of the connecting main column 330, is provided with a sleeve 334 which is matched with the pin and has an opening on the side, and the pin 333 is inserted into the sleeve 334 and can move along the inner wall of the sleeve 334; the two ends of the pin 333 are respectively provided with an external thread and a nut 335 matched with the external thread, so as to keep the pin 333 and the sleeve 334 relatively fixed. Specifically, the metal sheet 1 is fixedly connected with the pin 333, and the bottom end of the connecting main column 330 is fixedly connected with the sleeve 334. Through the arrangement, when the relative position between the liquid outlet end of the spray needle and the surface of the yarn is required to be adjusted, nuts at two ends of the pin bolt can be unscrewed, and the nuts are screwed after the position of the pin bolt is adjusted. The distance between the liquid outlet end of the spray needle and the surface of the yarn can be adjusted in a larger range through the movable adjusting column, and the relative position between the liquid outlet end of the spray needle and the surface of the yarn can be finely adjusted through the movable connecting structure of the pin bolt and the sleeve, so that a better dyeing effect is obtained.

The present application provides an ink jet device comprising one or more sets of the above described ink jet heads, which can be used for dyeing single or multiple yarns.

Specifically, the ink jet device also comprises an ink supply system, a yarn conveying device and a control system;

the ink supply system is used for supplying ink to each spray needle in the ink jet head;

the yarn conveying device is used for conveying the yarn to be dyed to enable the yarn to move along the central shaft in the dyeing direction;

the control system is used for determining the injection frequency and the injection quantity of each needle according to the dyeing requirement and the yarn movement speed so as to form corresponding driving electric signals and sending the driving electric signals to the piezoelectric resonator in each needle assembly.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims (11)

1. An inkjet head for dyeing yarn, comprising a plurality of needle assemblies;

the needle assembly includes:

a metal sheet;

the spray needle is positioned at the edge of the metal sheet and parallel to the metal sheet and is used for circulating dye liquor;

the piezoelectric resonator is positioned on the side surface of the metal sheet and used for driving the metal sheet to vibrate under the control of the driving electric signal so as to make the spray needle vibrate and accordingly shake out dye liquor in the spray needle;

the spray needle assemblies are distributed in an annular array of the yarn winding shaft, and the liquid outlet end of the spray needle in each spray needle assembly points to the yarn winding shaft;

the liquid outlet end of the spray needle is provided with an inclined end face.

2. The head of claim 1 wherein in each needle assembly, a line passing through the center of and perpendicular to the angled end face of the needle outlet end perpendicularly intersects the yarn axis.

3. The inkjet head of claim 1, wherein the plurality of needle assemblies are arranged in one or more groups of annular arrays;

each group of annular arrays comprises at least two needle assemblies;

the needle assemblies in each group of annular arrays are annularly and equally arranged around the yarn shaft on a plane perpendicular to the yarn shaft;

in the same annular array, straight lines passing through the centers of the inclined end faces of the liquid outlet ends of the spray needles and perpendicular to the inclined end faces intersect at the same point on the yarn shaft;

when the plurality of needle assemblies are arranged in a plurality of groups of annular arrays, the plurality of groups of annular arrays are arranged along the yarn shaft.

4. The head of claim 3 wherein the distances from the outlet end of each needle to the surface of the yarn are equal in the same annular array.

5. The inkjet head of claim 3 wherein the plurality of sets of annular arrays are equally spaced along the yarn axis.

6. The head of claim 3 wherein the number of needle assemblies in different annular arrays is the same and the positions of the needle assemblies are the same in a circular array around the yarn collar.

7. The inkjet head of claim 1, further comprising a securing assembly for securing the plurality of needle assemblies to form an annular array;

the fixed assembly comprises an annular mounting plate and a plurality of movable adjusting columns;

each movable adjusting column is connected with a spray needle assembly respectively, the movable adjusting columns are mounted on the annular mounting plate to form an annular array, and the movable adjusting columns can move along the radial direction of the annular mounting plate.

8. The inkjet printhead of claim 7, wherein said stationary assembly further comprises an annular rotating disk, said annular rotating disk and annular mounting disk being coaxially disposed and rotatable relative to the annular mounting disk;

the inner side wall of the annular rotating disc is provided with annular sawtooth-shaped grooves;

an annular boss coaxial with the annular mounting disc is arranged on the end face of the annular mounting disc, a plurality of mounting holes are formed in the side wall of the annular boss, and the mounting holes are used for mounting the movable adjusting column;

the movable adjusting column comprises a connecting main column, a roller device arranged at the top end of the connecting main column and a spring sleeved on the connecting main column, and the bottom end of the connecting main column is connected with the spray needle assembly;

the connecting main column of the movable adjusting column is inserted into a mounting hole of an annular boss on the annular mounting disc, a needle assembly connected with the bottom end of the connecting main column is positioned at the inner side of the annular boss, and a spring sleeved on the connecting main column is clamped between the roller device and the outer wall of the annular boss; the rollers in the roller device are pressed on the serrated groove walls of the annular rotating disc under the action of the elasticity of the springs; when the annular rotating disc rotates relative to the annular mounting disc, the rollers in the roller device roll on the serrated groove walls of the annular rotating disc, and meanwhile, the movable adjusting column moves in the radial direction of the annular mounting disc.

9. The ink jet head as claimed in claim 8, wherein an annular groove is provided on an outer circumferential surface of the annular mounting plate;

a plurality of uniformly distributed rotating wheels are arranged on the end face of the annular rotating disc, facing the annular mounting disc, and are positioned in annular grooves on the annular mounting disc; when the annular rotating disc rotates relative to the annular mounting disc, a plurality of rotating wheels on the annular rotating disc can roll along the annular groove.

10. The inkjet head of claim 7, wherein the movable adjustment post is movably coupled to the needle assembly;

the edge of the metal sheet is provided with a pin bolt parallel to the spray needle, the bottom end of the movable adjusting column is provided with a sleeve which is matched with the pin bolt and is provided with an opening on the side surface, and the pin bolt is inserted into the sleeve and can move along the inner wall of the sleeve; and two ends of the pin bolt are respectively provided with an external thread and a nut matched with the external thread, and the nut is used for keeping the pin bolt and the sleeve relatively fixed.

11. An inkjet device comprising one or more sets of inkjet heads according to any one of claims 1 to 10.

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