The method of applying the fluid in metered quantities to the sheet material and a device for its implementation

 

(57) Abstract:

Use: inkjet printing on textile fabrics. The inventive metered quantity of any fluid medium, such as dye, serves as sequences of discrete small amounts through the capillaries in boards that can be placed at an angle to the moving fabric for more small step. Across the road, the fabric goes through several such boards, and on command from the computer, the dye is ejected from the capillary to obtain any desired pattern. Each series cards can replace standard screen mesh in multi-color printing machine. 2 C. and 25 C.p. f-crystals, 8 ill.

The invention relates to methods and devices for supplying fluid medium to the sheet material in metered quantities.

The known method and device for feeding liquid to the fabric or sheet material, in particular for printing on fabric or quilted material type of carpet fabrics or tiles. The device contains a set in rows of nozzles, each of which is controlled by an Electromechanical valve. Material moving under the nozzles are ejected liquid droplets, and the opening and materialsa several such series.

The nozzle consists of a hollow needle or capillary tube with the diameter of the inner channel of 0.2-2 mm, where the pulses of 0.5 to 15 milliseconds shot liquid, the pulse duration varies depending on parameters such as the pressure of the liquid and its viscosity, the speed of advancement of the material and the size of the area to be close to each pulse.

Although the device is fully suitable for the application of the drawings, are usually available on carpets and carpet tiles, making it acceptable speed in comparison with other typical ways of applying the patterns for such products, it is very difficult to apply, when to apply small parts that must be present on clothing fabrics, as well as some kinds of apparel fabrics used for the manufacture of curtains, upholstery, etc. in addition, the known device cannot operate at speeds commensurate with typical speeds coloring of such fabrics.

In the invention includes a method of supplying fluid in metered quantities, which fail compressed the fluid to the valve cap release, containing a valve end and a feeding end and control the opening and closing of Klas feed end of the valve is thrown such a sequence, moreover, the valve opens only on the continuation of the time interval lying within the range of time intervals in which the amount of fluid admitted to the valve, and the amount emitted from the capillary release, linearly dependent on an interval.

In addition, the invention includes a method of supplying fluid in metered amounts from a variety of capillary releases, which may have different characteristics. According to the method fail compressed the fluid to the valves for liquid releases, and each one has a valve end and a feeding end, and control the opening and closing of the valves for admission to the valve ends of sequences of discrete quantities of fluid, resulting from the feeding ends of the valves are released such sequence, and the valves open only on the time intervals at which the quantity of fluid entering the valve and respectively emitted from the capillary editions, does not depend on the characteristics of the capillary releases.

The amount mentioned discrete quantities can range from 0.01 to 0.05 microliters.

Further, in the invention includes a method of applying acuautla through many valve capillary editions of the above means. The above issues can be spaced from each other in order to cause the fluid to the canvas lines, separated by 30 to see the Releases can accommodate speed relative to the moving web so that the spacing between the lines of application of the fluid onto the canvas was denser than the distance between adjacent releases.

The invention also includes a method of applying a fluid medium, for example, textile fabric, in which the dye is applied selectively from releases in the form of droplets with a volume of 0.01 to 0.05 microliters, and the placement and management of releases produced so that the droplets received at a density of 1,000,000 droplets per 1 m2.

The rate at which discrete quantities can be 2500-4000 m 1 C. Fluid medium may contain a liquid of small viscosity.

A device for applying a fluid medium to the canvas contains a supply of compressed fluid to the many valves, capillary editions of forming a number of and means for the relative movement of the blade and mentioned a number of issues, placed at an angle to the direction of relative movement so as to cause the fluid on the cloth is thicker in comparison with the distance between neighbouring issue is people charge with capillary releases placed on one edge and connected with the inlet through the valve installed on the card. The charge may be layered structure, and the capillary editions of grooves are formed between the facing to each other elements of the card. The design can be generally symmetric about the Central plane, providing one of the mentioned edge of the two series of releases. The valves are electrically operated and can be installed on the circuit Board. The composition of the valves may include pistons or membranes.

The card can be installed quickly removed and replaced on the base designed for mounting Board near the relatively moving tissue.

The Board may have the intake manifold for the fluid, and between the collector and releases can be mounted valves. The valves can accommodate groups on the branches of the manifold, and they can accommodate groups of four where each group has a square configuration, and the valves are held on the Board with end covers this group, and are fastened to the Board of the Central fastener. This Board can be bilateral, then the intake manifold is Central, and Klah is ing, control valves, and each valve may have a drive with two logical States "0" and "1", selector valve means, subscribed to the actuators corresponding logical state, and the actuator means simultaneously transmitting the start signal to all valves card, then take action only valves, actuators which are in the logical state "1", and valves, actuators which are in the logical state "0" triggered upon receipt of this signal.

To connect valve actuators valve selector tool can be used optoisolator.

In the device for each of a number of capillary releases may contain Plata, where is mentioned the number of capillary editions and valves, and valve drive means, and a processing unit for the said Board containing valve selector means. Part of the processing unit may include transputer.

In the primary system, providing coverage of any useful width, includes several such cards, it also contains the control computer, the serving team on the formation of the figure to the processing units of the respective boards.

the Fig.2 - a view along arrow a in Fig.1; Fig.3 is a view along line b-B in Fig.1 (on a larger scale; Fig.4 is a section similar to the view of Fig.3, which shows the differences valve of another type; Fig.5 is a diaphragm valve according to Fig.4, a front view, and Fig.6 is a horizontal projection installation for printing on fabric; Fig.7 is a schematic diagram of the control unit; Fig.8 - wiring boards.

The structure of the device shown in Fig.1-6, includes a supply 11 for the compressed fluid, by which it arrives to the variety of valves 12 cap 13 editions, ending in the same row, and the tool 14 (Fig.6) to promote cloth 15 under mentioned next edition of 13. A number of issues 13 is placed at an angle to the direction of movement of the fabric so as to cause the liquid to the cloth is thicker than the distance S between adjacent editions 13 (Fig.1). Releases 13 are placed on one edge 16 of the card 17. The valve 12 is installed on the circuit Board 17 made in the form of a layered structure, with the capillary 13 editions grooves formed between the facing to each other elements. The Board design is symmetrical relative to the Central plane 18 (Fig.2-4), and on the edge 16 is provided with two rows of 13 editions. The valves 12 are controlled e is Niki, connecting the valves 12 with connectors 21 on the edge 22 opposite edge 16. In the implementation according to Fig.1-2 printed circuit Board 19 are on the plate 23 made of synthetic material, on which there are recesses 23 and where the screws 24 are attached to the valves 12, and the screws are placed in the center of the lid 25 and each lid 25 closes the group of four valves. On each side of the card 17 is sixty-four valve 12. As the connectors 21 connectors are used on 65 contacts, with 64 of them are under the line of control and one is shared. The valves 12 are planted in the liners 26, made for example of elastomer. They have an inlet 27 and outlet 28 holes, respectively, the opening 27 communicates with a channel 29 formed by a shallow groove 31 in the plate 23 lying against the Central aluminum plate 32 of the laminate. The channel 29 is connected with the inlet 11 to the intake manifold 33 at the edge 22 of the Board 17.

In normal condition the discharge outlet 28 located in the center of the liner 26, closed by the piston 34 of the valve 12 is opened in the capillary channel 35 formed by the groove 36 in the Central plate 32. Replaceable elastomeric valve seat 12 on the liner 26 is made such that there remains calcev DVD compressed fluid connected with the capillary outlet.

In Fig.4 and 5 shows a design where the used diaphragm valve, the diaphragm 41 is a disk with slots 42 through which the Central section 43 is connected with an external annular section 44 of the elastic ridges 45. In the normal condition of the Central section 43 closes the opening 28 in the recess 46 in the aluminum plate 47, which sets the valve, and rises therefrom under the action of the steel piston 48 in the excitation of the solenoid 49. On the other side of the valve from the aluminum plate 47 has a flat surface, which lies opposite the etched Nickel plate 50 located at the center of the laminated Assembly and channels 51 representing the capillary releases.

Valves of any of the above types can operate at very high speeds, including, for example, up to 6000 Hz, with significant durability, providing one billion cycles per week for use on the continuation of 2-3 years. For example, the total bending of the Central part 43 of the membrane 41 may be of 0.12 mm. Usually capillary editions, formed by channels 35 and 51, have a cross-section of approximately 0.1 mm2or agree on a cone, ending the hollow needle insertion with much you can do without needle insertion. The use of such narrow passages results in significant resistance to the flow of fluids, particularly liquids, usually used in textile industry for printing. In their composition may include pigment paste and they have significant viscosity at strong friction with the walls of the passages. This design means that the passages will have different lengths and therefore different degrees of resistance to flow.

Before moving on tissue it was necessary to perform the two solid lines, the two capillary release continuously served the fluid by opening the appropriate valves and if one of the editions was significantly longer than the other, then he gave a weaker line, because the increased resistance led to the weakening of the flow. However, it was found that when the pressure in supply, this configuration of the capillary releases and data properties of the liquid there is some range of the duration of opening of the valve in which the flow of fluid from the capillary edition linear with respect to the duration of valve opening, does not depend on the length of the valve release. Therefore, when the valves Nabokov time each valve delivers exactly the same amount of fluid per pulse, regardless of the length of the release valve end to the prom. Therefore, this design with high-frequency valve not only provides high resolution and breadth of the moving fabric, but also provides a very uniform-giving fluid regardless of the position of the outlet end of the capillary relative to the valve. If the duration of each pulse is within the range, providing a linear, fluid flow, it is possible to control the flow, changing the pulse duration. However, from a management perspective, it is easier to arrange so that the pulses have the same duration, and for controlling the supply of liquid to regulate their frequency. The distance between pulses should be as close to sequential pulses did not leave spaces between the liquid droplets applied to the surface of the fabric, or Vice versa, so that when the selected maximum frequency of pulses droplets impacted on adjacent areas of tissue.

These designs allow you to place the trajectory of the droplets so close to each other that when nannett pulses provide such a high resolution, what can compete with screen printing with a mesh 80 mesh on the subtleties of detail. Stepwise placement improves the accuracy of the distance between the trajectories of the droplets, and any design errors are reduced significantly due to the location of the boards at an angle, in particular at very acute angles between the edges of the boards and the direction of movement of the fabric. For example, on a bilateral Board length 269 mm and width 40 mm (caps on the valves in two rows to accommodate 128 capillary editions. If seventy-five such boards to be placed side by side, when each card is oriented at an angle 8about50' to the direction of movement of the fabric (Fig.6) then you can cover the fabric with a width of 3 m 9600 outlet holes.

This construction is equivalent to one screen net and occupies approximately the same space as the rotating mesh, making this design can be integrated into an existing machine screen printing instead of a grid. In the printing machine may have as many of these structures, how many colors should be printed.

In the usual pattern of repeating patterns contains 4-5 million points, distributed in various colors (2-24), with the frequency of sex is on the valves from the control device.

The composition of the control device of each Board (Fig.7) includes a blade unit of the Central processor 71 (SRI), the payment schemes fixation on transistor-transistor logic 72 (TTL) and the charge valve actuator 73.

The CPU 71 contains a single-Board computer on transputer with constant memory and is supplied with the address bus 74 with address register-holders 75A, data bus 76 and the paths of the input and output control signals 75V and 75s. The CPU 71 is designed to control the timing and sequence of actuation of valves of the same color. The picture is loaded from a standard computer with commands such as start, stop, etc. To obtain step 80 mesh in the longitudinal direction of the time interval between the actuation of the valves make dependent on the speed of movement of the fabric. One method of synchronization control is the signal from the tachometer (circular shaft position sensor) connected with a drive belt.

After uploading the picture, it is stored in RAM, CPU, and, if necessary, in blocks of memory expansion (not shown).

On each Board with circuits Phi is einternal Board 78 (Fig.8) and connectors backplane 79 address bus 74 to 32 bits from the data bus 76 to 32 bits and bus control signals 76A. Each Board 72 is connected to the card valve actuators 73 34 five-wire cables 80, each of which receives 32 information bits and two power lines.

On each Board, valve actuators 73 are opto-isolator 81, shaper on the Darlington circuit 82 and the winding 83 for each valve on the Board 17.

The valve is in the on or off state by a signal with TTL level at the base of the shaper 82, assembled with open-collector Darlington circuit, it can switch the voltage to 80 VOLTS at a current of 0.3 a in the winding of the valve 83. When the width of the fabric in 2 m and the extension 80 mesh is applied 6300 valves. The dimensionality of a data bus 76 transputer 75 is 32 bits, and therefore, if necessary, simultaneous actuation of all valves information on the actuation of one valve (1 bit) is multiplexed packets 32 for 1 times. When information is recorded, its further passage is blocked until and unless that information is recorded at all valves and will not come accurate triggering. At this point, all the latches 84 receives the signal resolution and every driver on the Darlington circuit 82 depending on the logic level on the 4 and the preceding schemes on the one hand and the driver Darlington 82 on the other hand receiving power from different sources. Simultaneous actuation of all valves of the coil 83 consume about 2000 And at a voltage of 80 V and a frequency of more than 1.5 kHz. Therefore, there is a separate chip register-latch 84, the output of which is fed to a chip optical isolation 81, where he already goes to the Darlington driver 82. On each Board contains sixteen chips case clamps, providing management 128 shapers. On each Board, valve actuators 73 contains 32 chetvertnyh chip formers Darlington 82 and 32 chetvertnyh chip optoisolators 81. Drawing on the fabric at step 80 mesh is made by opening and closing valves, changing as promote tissue.

The patterning is regulated by the main computer, as well as separate controllers for each color path. The main computer is designed for supplying commands and images to be downloaded to the controller of each color path. As software on the host computer applies a program of interfacing human-machine and program broadcast picture. Program organization pairing allows operators to load pictures, run, Astana or in the composite file, or in a separate color files and translated in the file of bit combinations for each color path. In the first part of the process of translation figure is divided into spatial bit pattern for each color. The second part of the process of this drawing is converted into a sequence of actuation of the valves, which valves are not on a straight line along the fabric. If the Protocol is known, the first part of the software broadcast can work from any data source, such as a color scanner can scan and enter pictures, picture, document, etc., the host computer can also be used for error reporting and Troubleshooting. Separate spatial bitmap images of each color can also be used in a relatively simple image analysis when comparing the finished dyed fabric with the original drawing as a means of quality control and to identify defective valves.

The main advantage of the proposed system in comparison with standard screen printing, rotary printing that prints and colors can be changed by changing software without stopping the machine, the wealth is in the shadow), because there is a means for carrying out short runs, not hinder long-term production process.

Because the stock fluid in the system is very small, then the change of color can be easily and quickly accomplished with the use of small quantities of wash water at a very low waste and effluents.

THE METHOD OF APPLYING THE FLUID IN METERED QUANTITIES TO THE SHEET MATERIAL AND A DEVICE FOR ITS IMPLEMENTATION.

1. The method of applying the fluid in metered quantities to the sheet material by supplying compressed fluid to the valve cap issue with the valve and the feed ends, and controls the opening and closing of the valve for sequential access to the valve end of the discrete quantities of fluid and release them from the feed end, wherein the valve is open only during the time interval in which the quantity of fluid admitted to the valve, and the amount emitted from the capillary release, linearly dependent on an interval.

2. The method of applying the fluid in metered quantities to the sheet material from a variety of capillary editions that have different characteristics, put the speaker ends, and controls the opening and closing of the valves for sequential access of discrete quantities of fluid to the valve ends with the subsequent release from the feed ends of similar discrete quantities of fluid, characterized in that the valves open only during time intervals in which the quantity of fluid admitted to the valve and the amount emitted from the capillary release does not depend on the characteristics of the capillary releases.

3. The method according to p. 1 or 2, characterized in that the amount of discrete quantities of fluid is 0.01 - 0.05 µl.

4. The method according to PP.1 - 3 of applying a fluid medium, such as a dye, to the sheet material, characterized in that the metered quantity of fluid fed through the multiple valve capillary releases.

5. The method according to p. 1, characterized in that the issues had been placed from each other with the possibility of applying the fluid to the material lines spaced at 30 cm

6. The method according to p. 4 or 5, characterized in that the releases post speed relative to the moving material to accommodate lines of application of the fluid material closer than the distance between adjacent releases.

2.

8. The method according to PP.1 to 7, characterized in that the discrete quantities of fluid are consecutively supplied with a speed of 2500 - 4000 m/s

9. The method according to PP.1 to 8, characterized in that the fluid medium contains a liquid of small viscosity.

10. A device for applying fluid in metered quantities to the sheet material containing an inlet for the compressed fluid to the many valves, capillary releases ending in the same row, and means for moving the material over a number of editions, characterized in that a number of issues for applying the fluid material is placed at an angle relative to the moving material and establish denser than the distance between adjacent releases.

11. The device for applying the liquid in metered quantities to the sheet material containing a card with a capillary releases placed on one edge and connected to the inlet through the valves, wherein the valves are mounted on the Board.

12. The device according to p. 11, characterized in that the card has a layered consi.

13. The device according to p. 12, characterized in that the Board design is located symmetrically to the Central plane to provide on one edge of the two series of releases.

14. The device according to PP.10 to 13, characterized in that the valves are electrically operated and mounted on printed circuit Board.

15. The device according to PP. 10 to 14, characterized in that the valves contain pistons.

16. The device according to PP. 10 to 15, characterized in that the valves contain membrane.

17. The device according to PP.11 to 16, characterized in that it contains a card with a capillary editions installed quickly removed and replaced on the base for mounting near the moving material.

18. The device according to PP.10 to 17, characterized in that it contains charge from the intake manifold for the fluid and for mounting the valve between the reservoir and releases.

19. The device under item 18, characterized in that the valves are placed in groups on the branches of the manifold.

20. The device according to p. 19, characterized in that the valves are placed in groups of four and each group has a square configuration, and the valve is held on the Board by using a cover, which closes the group and bonded with Jena bilateral, the intake manifold is Central, and the valves are placed on opposite surfaces of the Board.

22. The device according to PP. 10 to 21, characterized in that it comprises means of control valves.

23. The device according to p. 22, characterized in that it comprises an actuator for each valve with logical States "0" and "1", selector valve means for ascribing logical States of the actuators and actuator means for simultaneously transmitting to run on all valves card, and on the arrival of the trigger signal trigger valve actuator which is in the logical state "1", and a valve actuator which is in the logical state "0", action not come.

24. The device according to p. 23, characterized in that the valve actuator connected to the valve selector means through optoisolators.

25. The device according to PP. 22 to 24, characterized in that it comprises for each of a number of capillary editions of cost, with a number of issues, the valve and the valve drive means to him, and a processing unit for payment, containing valve selector tool.

26. The device according to p. 25, wherein the processing unit contains transputer.


 

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