WO2018133257A1

WO2018133257A1 - Printing assembly apparatus

Info

Publication number: WO2018133257A1
Application number: PCT/CN2017/083966
Authority: WO
Inventors: 钟博文
Original assignee: 长胜纺织科技发展(上海)有限公司; 钟博文
Priority date: 2017-01-23
Filing date: 2017-05-11
Publication date: 2018-07-26
Also published as: CN108340661B; CN108340661A

Abstract

Disclosed is a printing assembly apparatus, comprising at least one printing couple unit (5) arranged outside the circumference of a central roller (1) of a transfer printing machine, wherein each printing couple unit (5) comprises a printing form roller (511) used for pre-making a design pattern, a transfer roller (512) used for transferring the design pattern on the printing form roller (511) to a fabric and a pressure-exerting assembly, with the transfer roller (512) being located between the printing form roller (511) and the central roller (1) and the pressure-exerting assembly being used for adjustably providing pressure for the transfer roller to press the printing form roller (511); and the pressure-exerting assembly is capable of making the transfer roller (512) move selectively to a pressing position and a rest position, wherein at the pressing position, the transfer roller presses the printing form roller; and at the rest position, the transfer roller does not press the printing form roller.

Description

Printing set device

Technical field

The invention relates to a printing and dyeing machine for the textile industry, in particular to a printing sleeve device for use in a transfer printing machine.

Background technique

There are many printing and dyeing processes and machinery types. At present, the main printing processes on the market include screen printing, roller printing, plate printing, transfer printing and digital inkjet printing. The corresponding equipments are mainly rotary screen printing machines, flat screen printing machines, roller printing machines, and Taiwan. Plate printing machine, transfer printing machine, digital inkjet printing machine, etc. Transfer printing is one of the more rapid development of textile printing processes. Transfer printing began in the late 1960s. The early transfer printing mainly adopted the thermal transfer printing process, that is, a printing method in which a certain dye was printed on paper or the like and then transferred to the fabric by hot pressing or the like. In recent years, in addition to thermal transfer printing, cold transfer printing has developed rapidly. Cold transfer printing is to use a water-based color paste to print the pattern onto the coated paper, transfer it to the fabric at room temperature, then pass the cold pile or steaming color, and finally wash the color to remove the floating color, and complete the whole printing process. a printing process.

The transfer printing has the imitation digital printing quality, and can be mass-produced, and the cost is much lower than the digital printing, so the market prospect is broad.

For example, according to a prior art flexographic drum type transfer printing system and a printing method, the stamping cylinder surface during transfer printing is used as an ink carrier for transferring printing as an ink carrier for transfer printing, immediately after printing on the surface of the stamping cylinder Transfer printing is carried out, and then the surface of the impression cylinder is cleaned. That is, the multi-color printing unit is arranged around the center of the impression cylinder by the printing principle of the flexographic printing machine, and the multi-color printing is performed on the surface of the impression cylinder; the printed surface of the cylinder and the printed fabric and the printing blanket are printed. Closed, complete the transfer printing. The flexographic type transfer printing system does not need to use transfer printing paper as a medium for transfer printing, which reduces the cost of transfer printing paper, reduces the energy consumption, printing cost and equipment investment required for transfer printing paper printing.

However, in practical applications, the applicant found that although the existing transfer printing technology solution can realize the consumption of the transfer temporary carrier without paper, the obtained printing pattern has insufficient precision and cannot express the fine line outline of the pattern, and cannot satisfy people. The need for high-precision, high-quality printing effects.

With the printing and dyeing industry, the printing and dyeing production is energy-saving and emission-reducing, and people print high-quality printing on textiles. The demands for fineness, three-dimensionality and layering are getting higher and higher, the market is tilting towards high value-added products, and the demand for new technology development of textile pattern printing technology is getting stronger and stronger. In the production of printing, there is a need for an efficient transfer printing technology and equipment capable of achieving high-precision, high-quality printing effects, especially as a key component of the transfer printing technology, and an efficient printing unit is urgently needed.

Summary of the invention

Accordingly, the present invention is directed to a printing sleeve device capable of achieving a high-precision printing pattern while realizing the consumption of a transfer temporary carrier such as no paper, and capable of expressing a fine line outline of the pattern, which is low Cost, low energy consumption, high printing efficiency, high-precision, high-quality printing effect, to meet people's demand for fineness, three-dimensionality and layering of textile printing patterns.

The technical solution provided by the present invention to solve the problems and shortcomings of the prior art is:

A printing sleeve device comprising at least one printing color group unit distributed around a circumference of a center roller of a transfer printing machine, wherein each printing color group unit comprises a printing plate for prefabricating a flower pattern a roller, a transfer roller for transferring a pattern on the printing plate roll to the fabric, and a pressing assembly, the transfer roller being located between the printing plate roller and the center roller, the pressure applying assembly for providing an adjustable transfer The roller resists the pressure of the printing plate roll; and wherein the pressing assembly is configured to selectively move the transfer roller to the pressing position and the rest position, and in the pressing position, the transfer roller presses against the printing plate roller, thereby generating a transfer The roller resists the pressure of the printing plate roll; in the rest position, the transfer roller does not press against the printing plate roll.

Preferably, the pressure applying assembly includes a rotatable eccentric bushing, and a shaft end of the transfer roller is rotatably mounted within the eccentric bushing.

Preferably, by rotating the eccentric bushing to move the transfer roller to a different pressing position, the distance between the transfer roller and the printing plate roller can be adjusted, thereby adjusting the pressure of the resulting transfer roller against the printing plate roller.

Preferably, the transfer roller is a hard material roll coated with rubber.

Preferably, the rubber may be natural rubber, styrene butadiene rubber, urethane rubber or any other rubber having good affinity for aqueous inks.

Preferably, the transfer roller has a surface rubber Shore hardness of 85-90 degrees.

Preferably, the outer diameter of the printing plate <the outer diameter of the transfer roll ≤ the outer diameter of the printing plate roll +1 mm.

Preferably, the pressing assembly further includes a connecting rod for driving the rotation of the eccentric bushing and a swing arm for moving the connecting rod, one end of the connecting rod is connected to the eccentric bushing, the connecting The other end of the rod is connected to the swing arm, The swing arm is pivotable relative to the body of the printing color unit by a swing arm pivot.

Preferably, the pressure applying assembly further includes an actuator that drives the swing arm to pivot, and pivoting of the swing arm causes the link to drive the eccentric bushing to rotate, thereby moving the transfer roller to the pressing position or Resting position.

Preferably, one of the pressure applying members is provided on each of the two axial end sides of the transfer roller.

Preferably, one of the pressure-applying assemblies is provided on each of the two axial end sides of the transfer roller, and the swing arm on one axial end side and the swing arm on the other axial end side are pivoted synchronously by the same swing arm pivot. Thereby, the synchronous movement of the two connecting rods and the eccentric bushing is realized, so that the two shaft ends of the printing plate roller are simultaneously pressurized.

Preferably, only one of the pressing members on the two axial end sides of the transfer roller includes an actuator for driving the swing arm to pivot.

Preferably, the swing arm includes a first arm and a second arm, each arm including a first end and a second end, the first end of the first arm being pivotally coupled to the actuation by a pin a projecting end of the second arm, the first end of the second arm being pivotally coupled to the other end of the link by a pin, the second ends of the two arms being non-rotatably fixed to the swing arm On the end of the shaft.

Preferably, the printing plate roll is a gravure printing plate roll, a flexographic printing plate roll, a cylinder printing plate roll or an offset printing plate roll.

Preferably, each of the printing color unit further includes a pushing device for providing a propulsive force for advancing the transfer roller toward the center roller, the pushing device being mounted on the frame of the printing color unit.

Preferably, each of the printing color unit units can be independently advanced or moved toward the center roll by means of a respective propulsion device.

Preferably, the propulsion device also provides an independently adjustable pressure for the transfer roller to abut the fabric to be printed on the center roll.

Preferably, each of the printing color group units further includes a frame in which a mounting block is disposed, the transfer roller and the printing plate roller are rotatably mounted to the mounting block, and the mounting block can be The frame moves toward the center roller.

Preferably, a slide rail is disposed in the frame, and the mounting block is slidable on the slide rail.

Preferably, the axes of the transfer roller, the printing plate roll, and the center roll are parallel to each other but not coplanar.

Preferably, each of the printing color unit further includes a pressure lock for locking the pressure between the transfer roller and the printing plate roller.

In another aspect, the present invention provides a paperless transfer printing machine including a center mounted to a rack Roller and print sleeve device in accordance with the present invention.

Other objects, features, and details of the present invention will become more fully apparent from the description of the appended claims.

The advantages of the respective embodiments and various additional embodiments will be apparent to those skilled in the art in the <RTIgt; In addition, the various features of the drawings discussed below are not necessarily drawn to scale. Dimensions of various features and elements in the figures may be enlarged or reduced to more clearly illustrate embodiments of the invention.

DRAWINGS

The invention will now be further described with reference to the drawings and embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an overall schematic view of a transfer printing machine including a gravure type printing sleeve device in accordance with one embodiment of the present invention.

Figure 2 is a schematic illustration of a single print color set unit of a gravure type print sleeve device in accordance with this embodiment of the present invention.

Figure 3 is a cross-sectional view of the printing color unit of the gravure type printing sleeve device according to the embodiment of the present invention taken along the axial direction of the actuator, the swing arm, the connecting rod, the eccentric bushing and the like.

4 is a schematic view of a printing color unit of a flexographic type printing sleeve device in accordance with another embodiment of the present invention.

Figure 5 is a schematic illustration of a printing color unit of a rotary screen type printing sleeve device in accordance with yet another embodiment of the present invention.

Figure 6 is a schematic illustration of a printing color set unit of an offset type stamping sleeve device in accordance with yet another embodiment of the present invention.

Figure 7 is a schematic illustration of the force and positional relationship of a printing color unit and a center roll in accordance with the present invention.

1-center roll; 2-fabric; 4-guide roll; 5-print color set unit; 506-propulsion cylinder; 7-drying box; 508-swing arm; 509-actuator; 510-ink bucket assembly; Gravure printing plate roll; 512-transfer roll; 12-frame; 13-converter motor; 15- center roll cleaning system; 516-link; 501-frame; 502-mounting block; 503-eccentric bushing; One arm; 5082 - first arm; 504 - swing arm pivot; 517 - pressure locker; 518 - anilox roller; 519 - scraper; 520 - rotary screen; 521 - slurry tube; 522 - offset cylinder; - wetting mechanism; 524 - ink fountain; 525 - ink supply mechanism

detailed description

The technical solutions of the present invention will be further described in detail below through the accompanying drawings and the embodiments of the present invention. It should be noted that any technical features and any technical solutions in the embodiments do not limit the scope of protection of the present invention, and the scope of protection of the present invention should include any equivalent or alternative technology that can be conceived by those skilled in the art without any creative work. Program.

According to an embodiment of the present invention, the aqueous ink may be first printed in a set pattern on a transfer printing using a plate roll such as a gravure printing plate roll, a flexographic printing plate roll, a cylinder printing plate roll or an offset printing plate roll. On the carrier, the ink pattern on the transfer printing temporary carrier is then transferred to the fabric, thereby finally forming a printing pattern on the fabric to realize the printing of the fabric. Here, a case where a gravure printing plate roll is used will be described in detail as an example.

Referring to Fig. 1, there is shown a transfer printing machine including a gravure type printing sleeve device provided by the present invention to solve the problems and disadvantages of the prior art, which may include a center roll 1 and at least one print as a whole. Color group unit 5. The transfer printing machine adopts a satellite structure, and the at least one printing color group unit shares a center roller as a back pressure roller.

The center roll 1 is fixedly attached to the frame 12 by bearings. The center roller 1 can be driven to rotate by the inverter motor 13. The center roll 1 may be a hard material roll coated with rubber. The surface rubber has a Shore hardness of 85 to 90 degrees, preferably 90 degrees. The outer diameter of the center roll 1 may be 1600-2000 mm, preferably 1800 mm. Alternatively, the center roll can be filled with oil by a cavity, and the oil is heated by an electric heating rod built in the cavity, so that the temperature of the center roll 1 can be raised to 30-150 °C. Obviously, those skilled in the art can control the temperature of the center roller by other heating methods according to actual needs. The central roller can be heated and heated to stably transfer the printing temperature, avoiding a large temperature difference due to seasonal changes or day and night changes, resulting in unstable product quality between batches; and for some high-density and high-density fabrics, the heating can further expand the printing to be printed. Fabric fibers, thereby increasing the dye uptake rate and dyeing speed.

At least one (for example, 2-8, 6 shown in FIG. 1) printing color group units 5 are distributed around the circumference of the center roll 1, and the printing color group unit or the printing color group units constitute a printing portion according to the present invention. Set of devices. Each of the printing color unit units 5 independently provides its propulsive force toward the center roller 1 by a respective propulsion device, such as a propulsion cylinder 506. The push cylinder 506 is mounted on the body of each of the printing color unit units 5, for example, on the frame 501 of the body.

Alternatively, the transfer printing machine may further include a guide roller 4. More preferably, at least two guide rolls 4 are provided. At least one guide roller is disposed in the vicinity of the inlet and the outlet in contact with the center roll of the fabric to be printed. The guide roller 4 guides the fabric 2 into or out of a pressurized section between the center roll 1 and the printing color unit 5. Preferably, each guide roller 4 can be a hard material roll. Each guide roller may have an outer diameter of 100-150 mm.

Optionally, a drying box 7 may be disposed between the respective printing color group units 5 for ensuring drying of the ink after printing, and preventing coloring and coloring between the multiple color sets. In particular, referring to Fig. 1, five drying boxes 7 are provided which are alternately distributed with the six printing color group units 5 on the periphery of the circumference of the center roll 1.

Alternatively, the transfer printing machine may further include an in-line center roll cleaning system 15 disposed in the non-pressurized section of the center roll 1 and the printing color set unit 5. The online center roller cleaning system 15 includes a cleaning device, a wiper blade and an oven. After the surface of the center roller 1 is cleaned by the cleaning device, the surface moisture of the center roller 1 is scraped off by a wiper blade, and then dried in an oven to realize continuous cycle application. . The cleaning device can include a showerhead and a brush.

Alternatively, the transfer printer may also include an automatic control system for controlling the speed of each roller, fabric tension, transmission correction, propulsion and pressure, and the like.

2 and 3 show a printing color unit 5 of a printing set device in accordance with this embodiment of the present invention. In the illustrated embodiment, each of the printing color unit units 5 may include the above-described propulsion device (e.g., propulsion cylinder 506), ink fountain assembly 510, gravure printing plate roller 511, transfer roller 512, and pressure applying assembly. The ink fountain assembly 510, the intaglio printing plate roller 511, the transfer roller 512, and the pressing member are mounted in the frame 501. The transfer roller 512 is located between the intaglio printing plate roller 511 and the center roller 1, and is in contact with the intaglio printing plate roller 511. The respective axial ends of the transfer roller 512 and the intaglio printing plate roller 511 can be mounted in a mounting block 502 in the frame 501. The mounting block 502 is slidable on a slide rail provided in the frame 501 such that under the advancement of the push cylinder 506, the mounting block 502 is moved toward the center roller 1 such that the transfer roller 512 reaches the center roller 1 The position of the fabric to be printed in contact. Here, the push cylinder 506 can also provide pressure to the transfer roll 512 against the fabric to be printed on the center roll 1. In accordance with an embodiment of the present invention, the pressure provided by each of the push cylinders 506 to urge the transfer roller 512 against the fabric to be printed on the center roll 1 can be independently adjustable. The pressure is adjusted by the control system, and can be stepped up according to the program or gradually decreased according to the program. The entire sleeve device is pushed by the push cylinder 506 along the linear slide rail to achieve clutching with the center roller, and the clutch stroke can be 2-5 cm.

The outer diameter of the gravure printing plate roll 511 can be selected according to the design of the design, and the outer diameter is usually 95-200 mm. The pattern of the design is engraved on the outer surface of the intaglio printing plate roll 511 by mechanical engraving, electronic engraving or etching. The gravure printing plate roll 511 is provided with an ink fountain assembly 510. The ink supply system delivers ink into the ink chamber formed between the ink fountain assembly 510 and the intaglio printing plate roller 511. The gravure printing plate roller 511 can be driven by a servo motor and synchronized with the gravure printing plate roller 511 of the other printing color group unit 5, thereby ensuring color registration accuracy.

Preferably, the transfer roller 512 may be a hard material roll coated with rubber. Its surface can be covered with seamless oak gum. The rubber is natural rubber, styrene butadiene rubber, urethane rubber or any other rubber having good affinity for aqueous ink. Preferably, the transfer roller 512 has a surface rubber Shore hardness of 85 to 90 degrees, more preferably 90 degrees.

Since the transfer roller 512 in each of the printing color group units is a rubber-coated hard material roller, the outer diameter of the transfer roller 512 is slightly larger than the intaglio printing plate roller 511, thus providing a certain tolerance while ensuring the complete transfer pattern. space. In the transfer printing process, when the rubber transfer roller is in contact with the printing plate roller, the rubber of the rubber transfer roller is deformed by a certain pressure under the action of the pushing device and the pressing force of the pressing member; when the printing plate roller When the current surface is turned away from the rubber surface of the rubber transfer roller, the rubber surface can be quickly restored to its original state. Preferably, the outer diameter of the gravure printing plate roll 511 <the outer diameter of the transfer roll 512 ≤ the outer diameter of the gravure printing plate roll 511 + 1 mm, that is, the outer diameter of the transfer roll 512 is larger than the outer diameter of the intaglio printing plate roll 511, But the difference between the two is below 1mm. The printing machine according to the invention has strong pressure bearing capability and high precision, and can fully carry the pattern, thereby ensuring the fineness of the pattern after transfer; in addition, the compression deformation of the rubber is small, so that it can withstand thousands of compressions per hour. There is no compression fatigue during the production cycle and permanent deformation.

The pressing assembly can be used to provide an adjustable pressure of the transfer roller 512 against the gravure plate roll 511. The pressing component is used to adjust the amount of ink to control the chromatic aberration, and the pressure is mainly used to stick the amount of ink in the intaglio cell. In the illustrated embodiment, the pressure applying assembly includes an actuator 509 and an eccentric bushing 503. The actuator 509 includes a cylinder block and a piston rod. The cylinder is pivotally coupled to the mounting block 502. The actuator 509 can be of a hydraulic type, a pneumatic type, or an electric type. Where the actuator 509 is of the hydraulic or pneumatic type, the length of the piston rod extension can be adjusted by adjusting the fluid pressure within the chamber of the cylinder. Preferably, the actuator 509 can be a servo actuator, such as a servo electric cylinder.

The pressure applying assembly can also include a swing arm 508 and a link 516. In the illustrated embodiment, the swing arm 508 is pivotally coupled to the mounting block 502 by a swing arm pivot 504. The swing arm 508 includes a first end and a second end. The first end of the swing arm 508 is pivotally coupled to the extended end of the piston rod of the actuator 509 by a pin. The second end of the swing arm 508 is pivotally coupled to one end of the link 516 by a pin. The other end of the link 516 is pivotally coupled to the eccentric bushing 503. Of course, it will be apparent to those skilled in the art that the rotation of the eccentric bushing 503 by the actuator 509 can be accomplished using any other transmission means in addition to the swing arm-link mode described herein. Alternatively, a handle may be provided at the end of the swing arm pivot to manually adjust the rotation of the eccentric bushing 503 by the operator during the commissioning phase.

In another embodiment in accordance with the invention, the swing arm 508 includes a first arm portion 5081 and a second arm portion 5082. Each arm includes a first end and a second end. The first end may be a small end and the second end may be a big end. The first end of the first arm 5081 is pivotally coupled to the extended end of the piston rod of the actuator 509 by a pin. The first end of the second arm 5082 is pivotally coupled to one end of the link 516 by a pin. Both the first arm 5081 and the second end of the second arm 5082 are non-pivotablely coupled to the swing arm pivot 504. For example, the second end may be provided with a pivot hole, and the swing arm pivot is fixed to the pivot hole of the second end by a keyway engagement, a positioning pin and a pin hole connection, or an interference fit. The swing arm pivot 504 is pivotally mounted to the mounting block 502. Preferably, the swing arm pivot 504 extends axially outward from the mounting block 502 to form an extension. The extension can be used to connect the second ends of the first arm 5081 and the second arm 5082. The other end of the link 516 is pivotally coupled to the eccentric bushing 503 by a pin.

The eccentric bushing 503 is sleeve-like as a whole, but the central axis of the outer cylindrical surface is not collinear with the central axis of the inner cylindrical surface, that is, the two are offset by a certain distance. The eccentric bushing 503 is rotatably mounted in a sleeve hole of the mounting block 502. In the illustrated embodiment, the outer diameter of the eccentric bushing 503 is slightly smaller than the inner diameter of the sleeve bore. The eccentric bushing is rotatable relative to the mounting block 502 in the sleeve bore about a central axis of the outer cylindrical surface of the eccentric bushing. Optionally, the eccentric bushing 503 also has a portion of the axially extending mounting block 502 for connecting the other end of the link 516. Referring to Figure 3, in an embodiment in accordance with the invention, the eccentric bushing can be rotatable by a flange provided at the axially extending portion and an opposite stop block mounted at the other end of the eccentric bushing Fitted in the sleeve hole of the mounting block to prevent axial movement in the sleeve hole to maintain the stability of its rotation.

One shaft end of the transfer roller 512 is rotatably mounted in the eccentric bushing 503 through a bearing. The central axis of the transfer roller 512 is collinear with the central axis of the inner cylindrical surface of the eccentric bushing 503. Since the central axis of the outer cylindrical surface of the eccentric bushing 503 is not collinear with the central axis of the inner cylindrical surface, thereby causing the central axis of the inner cylindrical surface of the eccentric bushing when the eccentric bushing is rotated in the bushing hole The position changes accordingly, so that the position of the axial end of the transfer roller 512 in the eccentric bushing 503 is correspondingly changed, and the position of the central axis of the transfer roller 512 is changed, resulting in the transfer roller 512 and the intaglio printing plate. The distance between the rollers 511 changes, thereby causing a change in the pressure between the two. When the eccentric bushing is rotated to move the transfer roller 512 to a pressing position, the distance between the transfer roller 512 and the intaglio printing plate roller 511 is reduced, and the two are pressed together, thereby causing the transfer roller 512 to press against the intaglio The pressure of the printing plate roller 511. When the eccentric bushing is rotated to move the transfer roller 512 to the rest position, the distance between the transfer roller 512 and the intaglio printing plate roller 511 is increased, and the two are separated from the pressing force (with or without contact), and the transfer roller 512 is not Pressure is applied to the gravure plate roll 511.

During operation, the transfer roller can be moved to different pressing positions by pressing the eccentric bushing by the pressing member as needed. By rotating the eccentric bushing 503 to move the transfer roller to a different pressing position, the distance between the transfer roller 512 and the intaglio printing plate roller 511 can be adjusted due to the above-described eccentric configuration of the eccentric bushing, thereby adjusting the resulting The transfer roller 512 presses the pressure of the intaglio printing plate roller 511. And because the rubber has the characteristics of flexibility, resilience, small hardness, etc., the deformation of the transfer roller 512 can be finely controlled by adjusting the pressure generated, so that the color of the printing can be further improved by adjusting the pressing pressure for the color registration of the printing. .

Preferably, in order to uniformly apply pressure to the gravure printing plate roller 511 in the longitudinal direction of the entire transfer roller 512, the other axial end side of the transfer roller 512 is provided with the same other pressing member. More preferably, the actuator on the other axial end side of the transfer roller 512 may be omitted, and only the swing arm, the link, and the eccentric bushing are provided, that is, the two pressing members share one actuator 509. The two swing arms on the two axial end sides of the transfer roller 512 are non-rotatably fixed to the swing arm pivot 504, whereby the two swing arms are synchronously pivoted by means of the swing arm pivot 504, thereby realizing two connecting rods and an eccentric shaft Synchronous movement of the set.

The eccentric bushing can be set to initially rest in the rest position. When the pressure is applied, the actuator 509 is actuated to extend the piston rod, and the swing arm 508 is pivoted about the central axis of the swing arm pivot 504 to drive the link 516 connected to the swing arm 508 to move. The movement of 516 in turn drives the eccentric bushing to rotate, the eccentric bushing 503 rotates to move the transfer roller 512 to a pressing position (refer to FIG. 2), and the distance between the transfer roller 512 and the intaglio printing plate roller 511 is reduced, The pressure is applied, thereby providing the pressure of the transfer roller 512 against the gravure plate roll 511. Conversely, when pressure is not required, the actuator 509 is actuated to retract the piston rod, and the swing arm 508 is pivoted about the central axis of the swing arm pivot 504 to drive the link 516 coupled to the swing arm 504. The movement of the connecting rod 516 in turn drives the eccentric bushing 503 to rotate, the eccentric bushing 503 rotates to move the transfer roller 512 to the rest position, and the distance between the transfer roller 512 and the intaglio printing plate roller 511 increases, and the two are separated. The pressure is applied, whereby the transfer roller 512 no longer applies pressure to the intaglio printing plate roller 511. The stroke of the piston rod of the actuator 509 can be set to 80-200 mm, preferably 100 mm.

The center roller 1, the transfer roller 512 and the axis of the intaglio printing plate 511 are parallel. Preferably, the axes of the three may not be coplanar. As can be seen from the schematic diagrams of Figures 1 and 2, the axes of the three are not collinear. Preferably, the axial connection of the three forms an included angle ranging from 130 to 170 degrees, which is preferably 146 degrees or 147 degrees. Further, it can also be seen from the schematic diagram of Fig. 2 that the swing arm pivot 504 is disposed substantially on the side of the printing plate roller 511 opposite to the transfer roller side. That is, the axes of the printing plate roller 511, the transfer roller 512, and the swing arm pivot 504 are arranged in a triangular shape. The advantage of such an arrangement is that the size of the printing color unit in the direction perpendicular to the axis of the center roll 1 can be reduced, so that the frame and the mounting block are compact in structure; in addition, the parts are easy to maintain and replace.

Further, when the mounting block 502 is moved toward the center roller 1 by the advancement of the push cylinder 506, as shown in Fig. 7, the direction in which the transfer roller 512 presses the pressing force F1 of the center roller 1 is parallel to the longitudinal direction of the slide rail. That is parallel to the longitudinal centerline of the printing color unit. The pushing force F1 can be decomposed into two components, vertical and tangential. Vertical division The amount refers to the actual printing embossing force F2 perpendicular to the outer peripheral surface of the center roll, that is, toward the center of the center roll, and the magnitude of this printing embossing force is expressed as the amount of rubber deformation of the rubber roll. The tangential component is a tangential component force F3 that is tangential to the outer circumferential surface of the center roll. The tangential component force F3 has a certain influence on the tangential deformation of the rubber roller cladding layer, but has little effect on the deformation of the printing pattern. For the same batch of printing operations, the required printing embossing force F2 should remain unchanged, so in the case where the angle β between the center line of the transfer roller and the center roller and the horizontal line is determined, the pressing force F1 and The magnitude of the tangential component F3 is related to the angle α between the longitudinal centerline and the horizontal line of the printing color unit. The smaller the angle α, the larger the pressing force F1 and the tangential component F3; The larger the angle α, the smaller the pushing force F1 and the tangential component F3. By providing the tangential component force F3, the tangential deformation of the rubber roller cover layer can be controlled.

In an embodiment, the angle α between the longitudinal centerline and the horizontal line of the printing color unit may be 0-90 degrees, preferably 15 degrees. The angle between the center line of the plate roll-transfer roll and the longitudinal center line of the printing color unit may be from 4 to 35 degrees, preferably 23 degrees.

Preferably, the printing color unit may further include a pressure locker 517 for locking the pressure between the transfer roller 512 and the intaglio printing plate 511, thereby avoiding pressure values due to unevenness of the surface of the fabric 2 during production. Micro-beating. The pressure locker can include a variable length member that is pivotally coupled to the eccentric bushing 503 at one end and pivotally secured to the mounting block 502 at the other end. The length of the component changes as the eccentric bushing 503 rotates. When the pressure of the transfer roller 512 against the gravure plate roll 511 is adjusted to a desired value by the actuator 509 as needed, the operator can lock the pressure locker 517 by any suitable means, thereby making the length variable. The length of the member is constant, thereby keeping the pressure of the transfer roller 512 against the gravure plate roll 511 constant.

Next, the operation of the transfer printing machine including the printing set device according to the present invention will be described by taking the cotton fabric 2 as an example.

The inverter motor 14 drives the center roller 1 to rotate, and the fabric 2 is guided between the center roller 1 and the respective printing color group units 5 by the guide roller 4. The push cylinder 506 applies a propulsive force, causing the mounting block in the printing color unit 5 to move toward the center roller 1, so that the transfer roller 512 abuts the fabric 2 on the center roller 1. At the same time, the upper and lower doctor blades of the ink fountain assembly 510 are moved toward and abut against the intaglio printing plate roller 511, during which an ink chamber is formed, and the ink in the ink chamber is printed on the transfer roller 512 by the gravure printing plate roller 511. The transfer roller 512 then transfers the pattern to the fabric 2. The drying box 7 located between the respective printing color group units 5 can be opened to ensure that the ink is dried after printing, and the color difference between the multiple sets of colors is prevented. After the printing of each printing color group unit 5, the color printing is completed, and finally, the other guiding roller 4 is taken out, and the process of subsequent fixing color washing is entered. If the fabric 2 is thin, the ink The fabric 2 may be infiltrated, causing the ink to stain to the surface of the center roll 1. In this case, the center roll cleaning system 15 can be used to clean and dry the surface of the center roll 1 for recycling.

At the time of transfer printing, the pressure of the transfer roller 512 is pressed by the pressing member to press the pressure of the intaglio printing plate roller 511, thereby ensuring a good printing effect. By adjusting the pressing pressure of the pressing member, the deformation of the transfer roller 512 can be finely controlled as needed and different fabrics, so that the color registration accuracy can be further improved by adjusting the pressing pressure.

According to another embodiment of the present invention, the center roll 1 can also be used as a transfer roll, that is, the printing plate roll 511 first prints the pattern on the transfer roll 512 through the ink in the ink chamber, and then the transfer roll 512 will The pattern pattern is transferred to the center roll 1, and finally the pattern pattern is printed on the fabric 2 by the center roll 1, whereby the printing of the fabric 2 is completed.

4 is a schematic view showing one of the printing color set units of the flexographic printing sleeve device in accordance with another embodiment of the present invention. Figure 5 is a schematic illustration of one of the printing color set units of a rotary screen type printing sleeve device in accordance with yet another embodiment of the present invention. Figure 6 is a schematic illustration of one of the printing color set units of the offset type printing sleeve device in accordance with yet another embodiment of the present invention. These embodiments are substantially similar to Figure 2 except that the plate rolls used are different.

The printing sleeve device according to the present invention achieves good effects in production and application of transfer printing products in terms of productivity and product quality. The individual printing color unit units can be independently pressure contacted or disengaged from the center roll by means of respective propulsion means, so that the other printing color group units continue to transfer the printing, and the pressure against the center roller can be independently adjusted. The transfer roller is used as the transfer temporary carrier, and the consumption of paper-free consumables not only reduces the running cost, but also is environmentally friendly, economical and practical. In addition, the printing sleeve device of the present invention can realize high-speed transfer printing production, and the printing speed can be as high as 30-60 m/min.

While the present invention has been shown and described with respect to the specific exemplary embodiments, the present invention is not limited by these exemplary embodiments. It will be appreciated that those skilled in the art can change and modify the exemplary embodiments without departing from the scope and spirit of the invention.

Claims

A printing sleeve device comprising at least one printing color group unit distributed around a circumference of a center roller of a transfer printing machine,

Wherein each of the printing color group units includes a printing plate roll for prefabricating the pattern, a transfer roller for transferring the pattern on the printing plate roll to the fabric, and a pressing assembly, the transfer roller being located at the printing plate roller Between the center roll and the center roll, the pressure applying assembly is adapted to adjustably provide a pressure of the transfer roll against the printing plate roll;

Wherein the pressing assembly is capable of selectively moving the transfer roller to the pressing position and the rest position, and in the pressing position, the transfer roller presses against the printing plate roller, thereby generating a pressure of the transfer roller against the printing plate roller; At the rest position, the transfer roller does not press against the printing plate roll.
A printing sleeve device according to claim 1, wherein said pressing member comprises a rotatable eccentric bushing, and a shaft end of said transfer roller is rotatably mounted in said eccentric bushing by rotating said eccentric shaft The sleeve is capable of adjusting the distance between the transfer roller and the printing plate roller, thereby adjusting the pressure of the resulting transfer roller against the printing plate roller.
The stamp sleeve device according to claim 2, wherein the transfer roller is selectively movable to a plurality of pressing positions by rotating the eccentric bushing.
A printing set device according to claim 1, wherein said transfer roll is a hard material roll coated with rubber.
The printing set device according to claim 4, wherein the rubber is natural rubber, styrene butadiene rubber, urethane rubber or any other rubber having good affinity for aqueous ink.
The printing set device according to claim 4, wherein the transfer roller has a surface rubber Shore hardness of 85 to 90 degrees.
A printing set device according to claim 1, wherein the outer diameter of the printing plate <the outer diameter of the transfer roll ≤ the outer diameter of the printing plate roll is +1 mm.
A printing sleeve device according to claim 2, wherein said pressing member further comprises a link for driving rotation of the eccentric bushing and a swing arm for moving said link, said link One end is coupled to the eccentric bushing, and the other end of the link is coupled to the swing arm, the swing arm being pivotable relative to the body of the printing color unit by a swing arm pivot.
A printing sleeve device according to claim 8 wherein said pressure applying assembly further comprises an actuator that drives the swing arm to pivot, the pivoting of the swing arm causing the link to drive the eccentric bushing Rotate, thereby transferring the transfer roller Move to the pressed position or the rest position.
A printing set device according to any one of claims 1 to 9, wherein one of the pressure applying members is provided on each of the two axial end sides of the transfer roller.
A printing set device according to claim 8, wherein one of said pressurizing members is provided on each of the two axial end sides of the transfer roller, and the swing arm on one axial end side and the other axial end side The swing arm pivots synchronously by means of the same swing arm pivot, thereby realizing the synchronous movement of the two connecting rods and the eccentric bushing, so that the two shaft ends of the printing plate roller are simultaneously pressurized.
A printing set device according to claim 11, wherein only one of the pressing members on the two axial end sides of the transfer roller includes an actuator for driving the swing arm to pivot.
A printing set device according to any one of claims 8, 9, and 11 to 12, wherein the swing arm includes a first arm portion and a second arm portion, each arm portion including a first end and a second end, the first end of the first arm is pivotally coupled to the extended end of the actuator by a pin, and the first end of the second arm is pivotally coupled to the link by a pin At the other end, the second ends of the two arms are non-rotatably fixed to the ends of the swing arm pivot.
A printing set device according to claim 10, wherein said swing arm includes a first arm portion and a second arm portion, each arm portion including a first end and a second end, the first arm portion One end is pivotally coupled to the extended end of the actuator by a pin, the first end of the second arm being pivotally coupled to the other end of the link by a pin, the first of the two arms Both ends are non-rotatably fixed to the end of the swing arm pivot.
The stamp sleeve device according to claim 1, wherein the printing plate roll is a gravure printing plate roll, a flexographic printing plate roll, a cylinder printing plate roll or an offset printing plate roll.
A printing set device according to claim 1, wherein each of the printing color set units further comprises a pushing means for providing a propulsive force for advancing the transfer roller toward the center roll, the pushing means being mounted on the printing color set On the frame of the unit.
A printing sleeve device according to claim 16 wherein each of the printing color unit units is independently advanced or disengageable toward the center roll by means of respective propulsion means.
A paperless transfer printing machine according to claim 17 wherein the advancement means further provides an independently adjustable pressure for the transfer roll to abut the fabric to be printed on the center roll.
A printing set device according to claim 16, wherein each of the printing color unit further comprises a frame in which a mounting block is disposed, the transfer roller and the printing plate roller being rotatably mounted to the mounting block Under the action of the propulsion device, the mounting block can move towards the center roller within the frame.
The stamp cover device according to claim 19, wherein a slide rail is disposed in the frame, and the mounting block is slidable on the slide rail.
The stamp sleeve device according to claim 1, wherein the axes of the transfer roller, the printing plate roller, and the center roller are parallel to each other but not coplanar.
The stamp cover device of claim 1 wherein each of the printing color unit further comprises a pressure lock for locking the pressure between the transfer roller and the printing plate roll.
A paperless transfer printing machine comprising: a center roll mounted to a frame; and a print sleeve device according to any one of claims 1-22.