JPH1181162A - Process for continuously print-dyeing long and narrow fabric and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dye-printing process and a dye-printing machine for continuously dyeing long and narrow fabric with jetted ink drips on both faces of the fabric symmetrically by using ink-jetting nozzles. SOLUTION: The first and second ink-jetting nozzles 7,8 are arranged horizontally so that they oppose to each other at a position or at different positions on an S-shape vertical fabric-conveying way and the ink-jetting positions and timings for these ink-jetting nozzles 7, 8 are controlled based on same pattern signals. Otherwise, a couple of nozzles 7, 8 jetting downward are set on the upstream and on the downstream of the S-shape fabric-conveying way so that these nozzles may mutually face oppositely on the faces of the fabric-conveying way and they are controlled in a similar manner whereby front face-back face symmetric patterns are printed on both faces of the long and narrow fabric passing through the conveying way. In the former process, there occurs no strain in the fabric on the conveying way and the patterns can be printed with high accuracy. In the latter process, both ink-jetting nozzles can be turned down and the positions of ink-dripping sports can be accurately controlled and the printing machine can be made compact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a means for printing a symmetrical pattern on both sides of a fabric using an ink jet nozzle, and more particularly to a method for printing by continuously applying ink droplets to a belt-like fabric. And an apparatus.

[0002]

2. Description of the Related Art A method of printing a pattern on both sides of a belt-like cloth using an ink jet nozzle is disclosed in JP-A-7-17-1.
There is a method described in Japanese Patent No. 50481 (first method) and a method described in Japanese Patent Application Laid-Open No. 3-45774 (second method). In the first method, an ink jet nozzle is arranged on one side of a cloth conveying path, and a band-shaped cloth treated with a pretreatment agent such as an aqueous resin is passed through the cloth conveying path to print a pattern on the front side. Then, the discharged fabric is turned over, and is passed through the fabric transport path again to print the pattern on the back side. Thus, the pattern is printed on both the front and back surfaces of the fabric, and after the color developing process, the fabric is washed with water and dried.

On the other hand, in the column of the embodiment of Japanese Patent Application Laid-Open No. Hei 7-150481, two ink jet nozzles are arranged at the same and separated positions on the upstream side and the downstream side of a cloth conveying path formed by an endless belt. A method and an apparatus for printing a pattern on one side by passing a belt-like cloth through a cloth conveying path are disclosed. As shown in FIG. 11, this apparatus feeds a cloth pre-processed for printing and wound into a roll into a conveying path, and feeds the cloth 15 fed into the conveying path precisely. And a winding unit 53 for drying and winding the printed fabric.

The main body section 52 includes a precision feeding mechanism 55 for fabric including a platen 54 and an ink jet recording mechanism 56. The precision feeding mechanism 55 has an endless belt 57 disposed along a fabric conveyance path. A cloth 15 is placed on the surface of this belt.
Is press-fitted and temporarily fixed to precisely step drive the endless belt. Inkjet recording mechanism 56
The ink jet nozzles 7 and 8 are respectively disposed upstream and downstream of a hot air duct 58 provided at an intermediate position of the endless belt 57 so as to face the endless belt. Each ink jet nozzle has a tank for ink droplets of a total of eight colors of special colors S1 to S4 in addition to the three primary colors of yellow, magenta, and cyan plus black.

In the printing method using the above-described apparatus, a belt-shaped cloth is temporarily fixed by being pressed against an endless belt, and the endless belt is step-feeded, and the number of dots of the pattern is thinned on the surface of the cloth by an upstream inkjet nozzle. Then, every time one line is recorded, a predetermined amount of steps is fed and dried, and the portion thinned out by the downstream inkjet nozzle is printed. When the printing of the pattern is completed, the belt-like fabric is peeled off from the belt and dried.

In the second method, a pattern is printed on the surface of the fabric by continuously applying ink droplets simultaneously on the front and back sides while the fabric is running intermittently almost vertically, and the back surface of the fabric is solid-color dyed. Is what you do.

[0007]

However, in the first method, a pattern is printed on one side through a belt-like cloth which has been subjected to a pre-treatment for printing on a cloth conveying path, and after drying, the pattern is reversed and the cloth conveying path is again turned on. To print the pattern on the other side,
This is possible in theory, but difficult in practice. That is, even if the pretreated fabric can be pressed against an endless belt in a state without wrinkles and a pattern can be printed on the surface, it is difficult to uniformly remove the fabric from the endless belt when it is peeled off. Remains. It is easy to wrinkle if the front and back are reversed and the belt is temporarily fixed to the endless belt in the state where the distortion remains, and the ink once attached to the fabric is transferred to the endless belt side to cause unevenness, and it is possible to obtain a high quality product. Have difficulty.

According to the second conventional method, it is possible to continuously apply ink droplets to a cloth, but a pattern, such as that seen when a cloth is printed with a screen printing machine or a rotary printing machine, strikes through. Such a pattern (a symmetrical pattern) cannot be provided.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and an apparatus for continuously applying ink droplets to both sides of a belt-shaped cloth and performing printing on both sides.

[0010]

According to a first aspect of the present invention, there is provided a method of printing a belt-like fabric, wherein first and second ink jet nozzles are arranged laterally so as to face the same position of a vertically arranged fabric transport path. The ink jetting positions and timings of the ink jet nozzles 7 and 8 are controlled based on the same symbol signal, and a symmetrical pattern is printed on both sides of the belt-like cloth 15 passing through the cloth conveying path. Things.

According to a second aspect of the present invention, there is provided a method of printing a belt-like fabric, wherein the first inkjet nozzle 7 and the other surface are provided at different positions of the fabric transport path provided in the vertical direction from one surface side toward the fabric transport path. The second ink jet nozzles 8 are arranged from the side toward the cloth conveying path, and the ink jetting positions and timings of these ink jet nozzles are controlled based on the same symbol signal to control the band-shaped cloth 15 passing through the cloth conveying path. It is characterized by printing symmetrical patterns on both sides.

According to a third aspect of the present invention, there is provided a method of printing a belt-like fabric, wherein downward inkjet nozzles are arranged on the upstream and downstream sides of a substantially S-shaped fabric transport path, and the two inkjet nozzles transport the fabric. It is arranged on the opposite side of the road, and the ink jetting positions and timings of these ink jet nozzles are controlled based on the same symbol signal to print a symmetrical pattern on both sides of the belt-like cloth 15 passing through the cloth conveying path. It is characterized by the following.

According to a fourth aspect of the present invention, there is provided an apparatus for printing on a belt-like cloth, wherein the cloth conveying path for continuously passing the band-like cloth and a first ink jet nozzle directed to one surface of the cloth passing through the cloth conveying path. 7 and a second ink jet nozzle 8 directed to the other surface, a controller for controlling the ink jetting positions and timings of the first and second ink jet nozzles, and a steamer 12 for coloring ink droplets attached to the fabric. It is characterized by having.

[0014]

According to the first aspect of the present invention, there is provided a method for printing a band-shaped fabric, wherein ink droplets are ejected from both sides at the same position and at the same timing on the band-shaped fabric sent in a vertical direction, thereby printing a symmetrical pattern on both sides of the fabric. Therefore, there is no need to consider the distortion of the fabric in the fabric transport path, and the pattern can be printed on both sides of the fabric with high accuracy.

According to the second aspect of the present invention, the method of printing a belt-like fabric is to print a pattern on both sides of the fabric by jetting ink droplets at vertically shifted positions on the belt-like fabric sent in the vertical direction. Since the fabric can be dried from the opposite side of the ink jet nozzle at the time of ejecting the ink droplet, the drying speed of the fabric can be increased.

According to the third aspect of the present invention, the ink jet nozzles 7 and 8 for printing on the front and back sides can be arranged downward, since the cloth conveying path is substantially S-shaped. The direction is downward. When the ink jet nozzle is arranged so as to eject ink droplets downward, the position at which the ink droplets adhere to the fabric 15 can be most accurately controlled, so that control is easy and a symmetrical pattern can be obtained. By providing the Z-shaped or S-shaped cloth conveying path, a compact and reasonable dyeing line can be obtained from the viewpoint of equipment arrangement.

According to the fourth aspect of the present invention, the apparatus for printing a belt-like cloth can obtain an optimum apparatus for carrying out the method according to the first to third aspects of the present invention, and a desired single-color pattern or multicolor on one or both sides of the cloth 15 can be obtained. A highly versatile device that can print a pattern with accurate accuracy is obtained. Fabric 1 with this device
When printing a symmetrical pattern on both sides of No. 5 by controlling the ejection timing of each ink jet nozzle by a computer based on a design signal, a printed material in which the pattern strikes through as in a screen printing machine is obtained. be able to.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view schematically showing a first embodiment of the apparatus of the present invention, which is an apparatus for producing a printed material in which a symmetrical pattern is expressed. The conveying path of the fabric is bent in an S-shape by guide rollers 2, 3, and 4 on the downstream side of the brake roller 1 having a gear cross section. The second guide roller 3 is composed of a pair of a driven roller and a drive roller, and feeds the cloth at a constant speed while applying tension to the cloth by the action of the brake roller 1 that rotates at a constant speed. The first inkjet nozzle 7 is arranged on the first horizontal portion 5 with the nozzle head facing downward. In the S-shaped second horizontal portion 6, a second inkjet nozzle 8 is disposed with its nozzle head facing downward. The transport path is vertical between the first guide roller 2 and the second guide roller 3, and a drying device 11 for blowing hot air 10 toward this portion is arranged. The drying device 11 dries ink droplets ejected from the first inkjet nozzle 7 onto the cloth 15 to prevent the ink droplets from adhering to the peripheral surface of the third guide roller 4. The cloth that has passed through the third guide roller 4 passes through a panel heater 9, an HT steamer 12, a cleaning device 13, and a finishing machine 14 having the same structure as in the related art to become a product.

FIG. 2 schematically shows, in plan view, an example of the first ink jet nozzle 7 used for printing a pattern. In the example shown in the figure, nozzle heads 7M and 7 of four colors of magenta M, cyan C, yellow Y and black B are used.
Four sets of inkjet nozzles 7 are arranged as a set of inkjet nozzles having C, 7Y, and 7B,
These inkjet nozzles 7 are mounted on a traverser 16 that reciprocates in the width direction of the fabric 15. The four nozzle heads 7M, 7C, 7Y, and 7B of each set are arranged slightly shifted in the feed direction of the fabric 15, and are based on a design signal from a computer.
A pattern is printed on the surface of the fabric 15 by ejecting ink droplets of each color from Y and 7B. Note that the second inkjet nozzle 8 has the same structure as the first inkjet nozzle 7, and the first and second inkjet nozzles 7, 8
The computer controls the ink ejection position and timing, and prints a symmetrical pattern on the front and back of the fabric.

FIGS. 3 and 4 show a control method of the first nozzle head, and FIG. 3 is a block diagram of the whole control device. An image processing device 22 is connected to a bus (bus) 21 of the control device via an interface.
The design signal to be printed is given from the image processing device 22 to the control device. The control device 23 is connected to a hard disk device 24 for storing control programs and design information, a floppy disk device 25 for data input / output, a liquid crystal panel 26 for design confirmation, and a touch panel 27 for control via an interface circuit. And CP for calculation
U28 and main memory 29 are provided.

Further, to the bus 21 of the control device, a servo motor 32 for feeding the cloth and an encoder 33 for detecting the rotation speed thereof are connected via an interface circuit and a servo amplifier 31. A motor 35 for reciprocating drive of the traverser and an encoder 36 for detecting the rotation of the traverser are connected via a servo amplifier 34. Further, four nozzle heads 7Y and 7Y are connected to the bus 21 via an interface circuit, a main body side control circuit 37 and a nozzle head side control circuit 38.
M, 7C and 7B are connected.

As shown in FIG. 4, each of the nozzle head side control circuits 38 is provided with a shift circuit 41 and a delay circuit 42, and these circuits include a shift amount setting device 43 and a delay amount setting device 42. Comes with.
The set values of these setting devices are input from the touch panel 27 while the control device is in the setting mode, and are set in the setting devices 43 and 44 of each nozzle head side control circuit.

The nozzle head is provided with a large number (for example, 56) of nozzle holes arranged in a straight line or in a staggered manner in the fabric feeding direction.
An ink ejection pattern signal d for a smaller number (for example, 48) of nozzle holes than the number of nozzle holes is provided. The ink ejection pattern signal d basically controls the ejection of the nozzle holes excluding a predetermined number (for example, four at both ends) on both sides of the multiple nozzle holes. The ejection pattern signal d is a combination of on / off signals corresponding to the number of nozzle holes in the decoder 45, but the drive signals for a predetermined number of nozzle holes at both ends are always off. This signal passes through the shift register 46 and is shifted forward or backward by the number set in the shift amount setting unit 43 in the feed direction of the cloth. On the other hand, the timing signal y of the ink ejection is given from the control device main body side to each nozzle head, but is delayed by the time interval set by the delay amount setting unit of the nozzle head side control circuit for each nozzle head, and the gate signal is outputted. Circuit 4
7, the gate circuit ejects ink from the nozzle head at the timing given to the ejection pulse. Although only one delay circuit is shown in FIG. 4, it is common that ink is ejected both in the forward path and the return path of the traverser 16, and in this case, the delay circuit for the forward path and the delay circuit for the return path are connected. Two delay means are provided.

With the above configuration, the four nozzle heads 7
By changing the set value of the shift amount setting device 43 of the head-side control circuit provided in each of Y, 7M, 7C, and 7B, the dot position of the ink ejected from each nozzle head onto the fabric is adjusted in the fabric feeding direction. be able to. Further, by changing the set value of the delay amount setting unit 44, it is possible to finely adjust the dot position in the feed direction of the traverser, that is, in the direction perpendicular to the cloth feed. Finely adjust the positional relationship of the dots of each color in the traveling direction of the traverser, i.e., the direction perpendicular to the feed direction of the fabric, and the positional relationship of the dots of each color in the feed direction of the fabric, so that more accurate color and sharper patterns with clear contours Patterns can be printed. FIG. 5 is a schematic diagram showing a fabric in which a symmetrical pattern is printed on both sides, and FIG.
Indicates a pattern on the front surface, and (B) indicates a pattern on the back surface. The illustrated fabric has an appearance in which the pattern is seen through, and gives an appearance as if it was printed by a screen printing machine.

FIG. 6 and FIG. 7 are diagrams schematically showing an embodiment of the method of the present invention. In the method of FIG. 6, the first and second inkjet nozzles 7 and 8 are
Are arranged sideways with the position shifted vertically. The method of FIG. 7 uses the first and second inkjet nozzles 7, 8
Are arranged opposite to each other at the same position on the vertical transport path. 6 and 7 in which the ink jet nozzles 7 and 8 are arranged horizontally, the ink droplets ejected from the nozzles are deflected downward due to gravity, so that the ink jet nozzles 7 and 8 and the cloth 15 Even when the distance between the dots changes minutely, the arrival point of the ink droplet on the cloth changes, and it becomes difficult to improve the accuracy of the positional relationship between the dots particularly when a multicolor nozzle is used.

FIGS. 8 to 10 show examples of the refraction shape and nozzle arrangement of the conveying path when the cloth conveying path is bent to dye both sides of the fabric. FIG.
A large-diameter heater drum 17 at the refraction portion between
Are arranged, and the fabric 1 is
5 is refracted, and the ink droplets attached to the cloth 15 are dried by the first inkjet nozzle 7.

In FIG. 9, two guide rollers 2,
3 form a Z-shaped cloth conveying path. The first inkjet nozzle 7 is connected to the horizontal portion 5 of the cloth transport path.
, And the second inkjet nozzle 8 is disposed obliquely downward at a portion where the cloth conveying path is oblique.
In FIG. 10, the cloth 15 is sent in an inclined zigzag shape by the two guide rollers 2 and 3, and the first inkjet nozzle 7 and the second inkjet nozzle 8 are both arranged obliquely downward. in this way,
Various shapes are possible for the shape of the transport path and the direction of the inkjet nozzles 7 and 8 in the nozzle arrangement portion.
As shown in FIGS. 8 and 9, a method of arranging the first inkjet nozzle 7 for printing a pattern downward on the horizontal portion 5 of the transport path should be adopted.

By arranging the ink jet nozzle 7 downward on a horizontal transport path, it is possible to accurately control the point at which ink droplets ejected from the ink jet nozzle 7 reach the cloth 15. Therefore, an accurate pattern can be printed with the fabric 15.
This is very important when an intermediate color is expressed by dot arrangement of ink droplets of different colors on the fabric.

[0029]

According to the present invention described above, the amount of waste liquid can be reduced to one tenth or less of that of the conventional apparatus, and there is no leakage of ink droplets and vapor outside the apparatus, and a very clean environment. Dyeing work is possible. In addition, since a symmetrical pattern can be printed on both sides of the belt-like fabric in unmanned continuous operation, the appearance of the pattern can be seen through, and a high-quality printed material as processed by screen printing can be obtained. .

[Brief description of the drawings]

FIG. 1 is a schematic side view of a first embodiment.

FIG. 2 is a schematic plan view showing an example of the arrangement of multicolor nozzles.

FIG. 3 is a block diagram showing the entire control device.

FIG. 4 is a block diagram of a nozzle head side control circuit.

FIG. 5 is a schematic diagram showing a symmetrical pattern on the front and back.

FIG. 6 is a side view showing a nozzle head arranged at a shifted position.

FIG. 7 is a side view showing the nozzle heads facing each other.

FIG. 8 is a partial side view showing a second embodiment of the cloth conveying path in the nozzle arrangement portion.

FIG. 9 is a partial side view showing a third embodiment of a fabric transport path in a nozzle arrangement portion.

FIG. 10 is a partial side view showing a fourth embodiment of a fabric transport path in a nozzle arrangement portion.

FIG. 11 is a schematic side view of a conventional continuous dyeing apparatus.

[Explanation of symbols]

 7 Inkjet nozzle 8 Inkjet nozzle 12 HI steamer 15 Fabric

Claims (4)

[Claims] A first and a second ink jet nozzles (7, 7) are opposed to the same position of a fabric conveying path provided in a vertical direction.
8) are arranged horizontally, and the ink jetting positions and timings of these ink jet nozzles are controlled based on the same design signal, and a symmetrical pattern is printed on both sides of the belt-like cloth (15) passing through the cloth conveying path. A continuous printing method for a belt-shaped fabric. 2. A first inkjet nozzle (7) directed from one side to the fabric transport path and a first inkjet nozzle (7) directed from the other side to the fabric transport path at different positions of the vertically arranged fabric transport path. A second ink jet nozzle (8) is arranged, and the ink jetting positions and timings of these ink jet nozzles are controlled based on the same symbol signal, so that both sides of the band-like cloth (15) passing through the cloth conveying path are front and back. A continuous printing method for a belt-like fabric, which comprises printing a symmetric pattern. 3. Downstream inkjet nozzles (7, 8) are disposed upstream and downstream of a substantially S-shaped fabric transport path, and each inkjet nozzle is located on the opposite side of the fabric transport path. The ink jetting position and timing of these ink jet nozzles are controlled based on the same symbol signal, and a symmetrical pattern is printed on both sides of the band-shaped cloth (15) passing through the cloth conveying path. A continuous printing method for fabrics. 4. A cloth conveying path through which a band-shaped cloth (15) passes, and a first sheet facing one surface of the cloth passing through the cloth conveying path.
Ink jet nozzle (7) and the second
An ink jet nozzle (8), a controller for controlling the ink jetting positions and timings of the first and second ink jet nozzles, and a steamer (12) for coloring ink droplets attached to the fabric. A continuous printing device for band-shaped fabrics.