TWI627070B - Paperless transfer printing machine - Google Patents

Abstract

A paperless transfer printing machine includes a printing unit and a printing color group unit. The printing unit includes: a central roller, and the two ends of the central shaft of the central roller are connected to the frame through bearings; the printing color group unit is distributed around the circumference of the central roller, and the fabric to be printed enters between the central roller and each printing color group unit for printing. Each printing color group unit includes a printing plate roller for a preformed pattern and a transfer roller for transferring the pattern on the printing plate roller to the fabric, and the transfer roller is located between the printing plate roller and the center roller.

Description

Paperless transfer printing machine

The invention relates to printing and dyeing machinery of the textile industry, in particular to a paperless transfer printing machine.

Printing and dyeing processes and mechanical categories are numerous and diverse. At present, the main printing processes on the market are screen printing, roll printing, plate printing, transfer printing and digital inkjet printing. The corresponding equipment is mainly rotary screen printing machines, flat screen printing machines, roll printing machines, and printing machines. Plate printing machine, transfer printing machine, digital inkjet printing machine, etc. Transfer printing is one of the textile printing processes that is developing rapidly. Transfer printing began in the late 1960s. The early transfer printing mainly used a thermal transfer printing process, that is, a printing method in which a certain dye is first printed on paper and other materials, and then the pattern is transferred to the fabric by hot pressing. In recent years, in addition to thermal transfer printing, cold transfer printing has developed rapidly. Cold transfer printing is the use of water-based color paste to print the pattern on the coated paper, transfer it to the fabric at room temperature, and then develop the color by cold stack or evaporation, and finally wash the floating color to complete the printing process. Printing process.

Transfer printing has the quality of imitation digital printing, and can be produced in large quantities. The cost is much lower than digital printing, so the market prospect is broad, but the consumption of transfer paper has become an obstacle to its green production. The market has also begun to develop some paperless transfer printing technology and equipment.

For example, a paperless thermal transfer printing technology in which metal foil is used instead of thermal transfer paper, prints a pattern on a circular metal steel strip by means of gravure printing. Then, the steel belt with a complete pattern is in contact with the fabric to be printed and passes through the heat transfer area. In the process, the pattern on the endless belt is transferred to the fabric to complete the printing of the fabric. At the exit of the heat transfer area, the loop The belt is separated from the printed fabric, the printed fabric goes to the finished product basket, and the belt goes to the residue removal area; in the residue removal area, the residue on the belt is removed and recycled, and the clean belt enters the entrance of the printing area and starts a new Loops, loops of loops from this cycle, realize paperless printing.

For another example, according to a prior art flexographic cylinder type transfer printing system and printing method, the impression cylinder surface during transfer printing is used instead of printing paper as an ink carrier for transfer printing, and is performed immediately after printing on the impression cylinder surface. Transfer the print and then clean the impression cylinder surface. That is, the multi-color printing unit is arranged around the center of the impression cylinder using the printing principle of the flexographic printing machine, and the multi-color printing is performed on the impression cylinder surface; the printed impression surface of the cylinder, the printed fabric, and the printed blanket Close, complete transfer printing. The flexo cylinder type transfer printing system does not require the use of transfer printing paper as a medium when transferring printing, reduces the cost of transfer printing paper, and reduces the energy consumption and printing costs and equipment investment required for transfer printing paper printing.

However, in actual application, the applicant found that although the existing paperless transfer printing technology scheme can achieve the consumption of transfer carriers such as paperless, the obtained printing pattern is not accurate enough to express the fine line contours of the pattern and cannot Meet people's demand for high-precision, high-quality printing effects.

As the printing and dyeing industry's demands for energy saving and emission reduction in printing and dyeing production and people's demands for high-quality printing, that is, the fineness, three-dimensionality, and layering of textile printing patterns, the market is tilting towards high value-added products. Textile pattern printing technology The demand for new technology development is increasing. In printing production, an efficient paperless transfer printing technology and equipment capable of realizing high-precision, high-quality printing effects is needed.

Therefore, the present invention aims to provide a paperless transfer printing machine which can achieve high-precision printing patterns while realizing consumption of transfer carriers such as paperless, and can express the fine line contours of the patterns With low cost, low energy consumption, and high printing efficiency, it achieves high-precision, high-quality printing effects, and meets people's needs for the fineness, three-dimensionality, and layering of textile printing patterns.

The technical solution provided by the present invention to solve the problems and disadvantages of the prior art is: a paperless transfer printing machine. The paperless transfer printing machine includes a printing unit for registering the fabric to be printed; Unit for unwinding the fabric to be printed and rewinding the printed fabric; Dust removal unit for dust removal and cleaning of the fabric to be printed; Expansion unit for horizontally unfolding and expanding the fabric to be printed The unit is controlled by the spreading motor to expand its spreading roller to unroll the fabric to be printed horizontally; the tension unit is used to control the tension state of the fabric during the entire printing process from unwinding to rewinding; the sizing and dehumidifying unit is used to The fabric is sizing and dehumidifying to facilitate subsequent coloring; the correction unit, the correction unit corrects the fabric to be printed entering the printing unit to ensure the accurate lateral positioning of the fabric and the longitudinal tension is appropriate; and the drying unit is used for Realizing drying of printed fabrics; wherein, the printing unit includes: a center roller, the center roller is mounted on a rack; and at least one Printing color group unit, at least one printing color group unit is distributed around the circumference of the center roller, and the fabric to be printed enters between the center roller and each printing color group unit for printing, wherein each printing color group unit includes a pattern for prefabrication. The pattern printing plate roller and the transfer roller for transferring the pattern on the printing plate roller to the fabric, the transfer roller is located between the printing plate roller and the center roller.

Preferably, the transfer roller is a hard material roller whose surface is covered with rubber.

Preferably, the rubber is natural rubber, styrene-butadiene rubber, polyurethane rubber, or any other rubber with good affinity for water-based ink. Preferably, the surface rubber of the transfer roller has a Shore hardness of 85-90 degrees.

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

Preferably, each printing color group unit further includes a pressure applying component for adjustingly providing the pressure of the transfer roller against the printing plate roller, wherein the pressure applying component can selectively move the transfer roller to the pressure Position and rest position, in the pressing position, the transfer roller presses against the printing plate roller, thereby generating the pressure of the transfer roller against the printing plate roller; in the rest position, the transfer roller does not press against the printing plate roller.

Preferably, the pressing component includes a rotatable eccentric shaft sleeve, and the shaft end of the transfer roller is rotatably installed in the eccentric shaft sleeve. By rotating the eccentric shaft sleeve, the distance between the transfer roller and the printing plate roller can be adjusted, thereby The pressure of the generated transfer roller against the printing plate roller was adjusted.

Preferably, the transfer roller can be selectively moved to a plurality of pressing positions by rotating the eccentric shaft sleeve.

Preferably, the pressure applying assembly further includes a link for driving the eccentric shaft sleeve to rotate and a swing arm for moving the link. One end of the link is connected to the eccentric shaft sleeve, and the other end of the link is connected to the swing arm. The arm can be pivoted relative to the body of the printing color group unit through a swing arm pivot.

Preferably, the pressure applying assembly further includes an actuator that drives the swing arm to pivot, and the pivot of the swing arm causes the connecting rod to drive the eccentric shaft sleeve to rotate, thereby moving the transfer roller to the pressing position or the rest position.

Preferably, one pressing component is provided on each of the two shaft end sides of the transfer roller.

Preferably, a pressure applying component is provided on each of the two shaft end sides of the transfer roller, and the swing arm on one shaft end side and the swing arm on the other shaft end side are pivoted synchronously by the same swing arm pivot, thereby Realize the synchronous movement of the two connecting rods and the eccentric shaft sleeve, so as to keep the two shaft ends of the printing plate roller under synchronous pressure.

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

Preferably, the swing arm includes a first arm portion and a second arm portion, and the first arm portion and the two arm portions each include a first end and a second end, and the first end of the first arm portion is pivotably supported by a pin. Connected to the extended end of the actuator, the first end of the second arm portion is pivotally connected to the other end of the connecting rod through a pin, and the second end of both arm portions is rotatably fixed to the swing arm pivot On the end of the shaft.

Preferably, the center roller is a hard material roller whose surface is covered with rubber and the cavity is filled with oil. The hard material roller is heated by an electric heating rod built in the cavity to control the temperature of the center roller.

Preferably, the printing plate roller is a gravure printing plate roller, a flexographic printing plate roller, a rotary screen printing plate roller or an offset printing plate roller.

Preferably, each printing color group unit further includes a pushing device for providing a pushing force for advancing the transfer roller toward the center roller, and the pushing device is installed on a frame of the printing color group unit.

Preferably, each printing color group unit can independently advance or leave toward the center roller by means of a respective pushing device.

Preferably, the advancing device also provides an independently adjustable pressure that causes the transfer roller to abut the fabric to be printed on the central roller.

Preferably, each printing color group unit further includes a frame, and a mounting block is arranged in the frame. The transfer roller and the printing plate roller are rotatably mounted in the mounting block. Under the action of the pushing device, the mounting block can be oriented in the frame. Center roller movement.

Preferably, a slide rail is provided in the frame, and the mounting block can slide on the slide rail.

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

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

Preferably, the tension unit includes a tension controller located downstream of the unwinding process, a tension swing bar device upstream of the printing unit, and a tension swing arm device downstream of the drying unit.

Preferably, a tension lever device is provided upstream and downstream of the sizing and dehumidifying unit.

Preferably, at least one guide roller is respectively provided near the entrance and exit of the fabric to be printed in contact with the center roller, and the at least one guide roller guides the fabric into or out of the pressurizing section between the center roller and the printing color group unit.

Preferably, the paperless transfer printing machine further includes a drying box located between each printing color group unit.

Preferably, the correction unit is located before the fabric to be printed enters the guide roller near the entrance where the central roller contacts the printing color group unit.

Preferably, the paperless transfer printing machine further includes an online center roller cleaning system arranged in a non-pressurized section of the center roller and the printing color group unit, which includes a cleaning device, a wiper blade and an oven, and the surface of the center roller is cleaned by the cleaning device. After that, the water on the surface of the center roller is scraped off with a wiper blade, and then dried in an oven to realize continuous loop application.

Preferably, the paperless transfer printing machine further includes a central control unit for controlling the rotation speed, the fabric tension, the transmission correction, the propulsion force and the pressure.

Other objects, features, and details of the present invention can be more fully understood with reference to the following detailed description of exemplary embodiments in combination with the drawings and according to the scope of the attached patent application.

Those skilled in the art will understand the benefits of the corresponding embodiments and various other embodiments by reading the following detailed description of the corresponding embodiments with reference to the drawings listed below. In addition, the features of the drawings discussed below are not necessarily drawn to scale. The dimensions of the various features and elements in the drawings may be enlarged or reduced to more clearly illustrate the embodiments of the present invention.

The technical solutions of the present invention will be further described in detail through the drawings and the embodiments of the present invention. It should be noted that any technical features and technical solutions in this embodiment 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 paying creative work. Program.

According to an embodiment of the present invention, a printing roller such as a gravure printing plate roller 511, a flexographic printing plate roller, a rotary screen printing plate roller or an offset printing plate roller may be used to print the water-based ink in a set pattern at the transfer printing stage. Then, the ink pattern on the transfer printing temporary carrier is transferred to the fabric 2, so that a printing pattern is finally formed on the fabric 2 to realize the printing of the fabric 2. A case where a gravure printing plate roller 511 is used is described as an example.

According to an embodiment of the present invention, a paperless transfer printing machine provided to solve the problems and disadvantages of the prior art is shown in FIG. 1 as a whole. The paperless transfer printing machine mainly includes the following parts: printing unit 100, automatic overprint unit (not shown), winder unit, dust removal unit 300, expansion unit, tension unit, sizing and dehumidification unit, correction Unit, high-definition image detection unit 900, and drying unit 1000. The arrangement order of each part can be shown in FIG. 1. The operator sends instructions to the central control unit through the human-computer interaction unit to uniformly manage and control each unit, thereby achieving automatic control.

The printing unit 100 is the core of the entire printing machine, and mainly includes at least one printing color group unit 5 and a center roller 1, which will be described in more detail below. The center roller 1 and each printing color group unit 5 are independently driven by AC servo motors. The motion controller in the central control unit connects each AC servo motor through a high-speed on-site bus, so as to realize the center roller 1 and each printing color group. Unit 5 high-precision synchronous control. The printing unit 100 uses an AC servo motor and a motion controller, which can realize the pre-registration function and greatly reduce material waste.

The automatic overprint unit is used to realize the automatic control of overprint. According to an embodiment of the invention, the automatic overprint unit includes a color mark sensor and an overprint controller. The color mark sensor detects the overprint error of the printed fabric in real time and sends the signal to the overprint controller. The overprint controller processes the error signal and sends it to the servo motor of the printing color group unit 5 for compensation, so as to realize automatic overprint control.

The unwinding unit is used for winding and unwinding the fabric. According to an embodiment of the present invention, the winding and unwinding unit includes a tight cloth rack 201 and a cloth drop traction device 202. According to the speed signal and control signal given by the central control unit, the winding and unwinding control is completed. The winding and unwinding tension is controlled by the winding and unwinding unit itself, and the tension can be set freely.

The dust removing unit 300 is located downstream of the tight cloth holder 201. According to an embodiment of the present invention, the dust removal unit 300 is a bristle dust suction device, which is driven by a variable frequency motor 13 to remove dust from the material, and a dust removal fan sucks the dust away through a pipe.

Amplifying unit is used to unfold the fabric to be printed horizontally. According to an embodiment of the present invention, the widening unit includes a two-roller active widening device 401 and a pre-sizing widening device 402. In both, the expansion motor controls the expansion roller to rotate the fabric to be printed horizontally. According to the degree of wrinkling of the material, the rotation speed of the widening roller can be set.

According to the embodiment of the present invention, the tension unit can control the tension state of the fabric throughout the printing process, and the tension from the feeding to the discharging is effectively controlled in the printing machine. According to an embodiment of the present invention, the tension unit includes a tension controller 603 located between the centering device 601 and the active traction device 602, a tension lever device 604 located downstream of the active traction device 602, and a downstream of the drying unit 1000. Tension swing arm device 605. According to another embodiment, two tension lever devices 604 are provided, one is located upstream of the sizing and dehumidifying unit, and one is located downstream of the sizing and dehumidifying unit. In this way, the transfer printing machine according to the present invention divides the tension control into the following sections: centering (after feeding), tension control before sizing, tension control before transfer printing, and oven (out of traction) tension control. The tension of each segment is detected by the tension sensor, and the closed-loop tension control is realized by the inverter. The tension of each section can be set freely to meet the needs of different materials.

The sizing and dehumidifying unit is used to perform surface pretreatment on the fabric 2 to facilitate subsequent coloring. The pretreatment mainly includes sizing and dehumidification. According to an embodiment of the present invention, the sizing and dehumidifying unit includes a sizing device 701 and a dehumidifying device 702 located downstream of the sizing device 701.

The correction unit is located before the guide roller 4 (see FIG. 2) near the entrance where the fabric to be printed enters the center roller 1 in contact with the printing color group unit 5, and is used to ensure that the fabric 2 is accurately positioned in the horizontal direction and the longitudinal tension is appropriate. According to an embodiment of the present invention, the correction unit includes an correction sensor 801 and a correction device 802. The correction sensor 801 detects the position of the edge of the fabric to be printed in real time and sends a signal to the correction controller of the central control unit. The correction controller sends a control signal to make the correction device 802 act, thereby ensuring that the fabric to be printed is always maintained at The same feeding position.

The high-definition image detection unit 900 may employ a high-speed camera. The high-speed camera takes the printed pattern and sends it to the central control unit for processing, and then displays the image signal through the liquid crystal display to provide the operator with real-time monitoring of the quality of the printed matter and improve the yield.

The drying unit 1000 is used for drying the printed fabric 2. According to an embodiment of the present invention, the drying unit 1000 is mainly composed of a temperature control system and a fan, and implements synchronous control according to a synchronization signal and a control signal given by the central control unit. The drying temperature and air volume can be set freely.

According to an embodiment of the present invention, the transfer printing machine may further include a corona processor 1100, which is located before the sizing process and is used for modifying the surface of the fabric 2 to be printed, and in particular, it can effectively improve the surface of the fabric 2 Wetting, adhesion and other properties are convenient for sizing and subsequent processes.

Referring to FIG. 2, the printing unit 100 will be described in more detail below. As described above, the printing unit 100 mainly includes the center roller 1 and at least one printing color group unit 5. The transfer printing machine adopts a satellite structure, and at least one printing color group unit 5 shares a center roller as a back pressure roller.

The center roll 1 is fixedly connected to the frame 12 through bearings. The center roller 1 can be driven to rotate by a frequency conversion motor 13. The center roller 1 may be a hard material roller whose surface is covered with rubber. The surface rubber has a Shore hardness of 85-90 degrees, preferably 90 degrees. The outer diameter of the center roll 1 may be 1600-2000 mm, and preferably 1800 mm. Optionally, the center roller can be filled with oil in the cavity, and the oil is heated by an electric heating rod built in the cavity, so that the temperature of the center roller 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, which can stably transfer the printing temperature, avoiding the instability of product quality between batches due to the large temperature difference caused by seasonal changes or day and night changes; and for some high-density and high-density fabrics, heating can further expand the Fabric fibers, thus increasing dye uptake rate and speed.

At least one (for example, 2-8, 6 are shown in FIG. 1) printing color group units 5 are distributed around the circumference of the center roller 1. Each printing color group unit 5 is independently provided with its propulsive force toward the center roller 1 by a respective propulsion device, such as a propulsion cylinder 506. The pushing cylinder 506 is mounted on the body of each printing color group unit 5, for example, on the frame 501 of the body.

Optionally, the paperless transfer printing machine may further include a guide roller 4. More preferably, at least two guide rollers 4 are provided. At least one guide roller 4 is respectively provided near the entrance and exit of the fabric 2 to be printed in contact with the center roller 1. The guide roller 4 guides the fabric 2 into or out of the pressurizing section between the center roller 1 and the printing color group unit 5. Preferably, each guide roller 4 may be a hard material roller. The outer diameter of each guide roller 4 may be 100-150 mm.

Optionally, a drying box 7 may be provided between each printing color group unit 5 to ensure that the ink is dry after printing, and to prevent the phenomenon of color cross-talk between multiple sets of colors. In particular, referring to FIG. 1, five drying boxes 7 are provided, which are alternately distributed with the six printing color group units 5 around the circumference of the center roller 1.

Optionally, the paperless transfer printing machine according to the present invention may further include an on-line center roller cleaning system 15 arranged in a non-pressurized section of the center roller 1 and the printing color group unit 5. The on-line 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 wiped off by a wiper blade, and after drying in the oven, a continuous loop is achieved. application. The cleaning device may include a shower head and a brush.

3 and 4 show the printing color group unit 5 of the paperless transfer printing machine according to the embodiment of the present invention. In the illustrated embodiment, the printing color group unit 5 may include the above-mentioned pushing device (for example, the pushing cylinder 506), the ink fountain element 510, the gravure printing plate roller 511, the transfer roller 512, and a pressing component. An ink fountain module 510, a gravure printing plate roller 511, a transfer roller 512, and a pressure applying module are installed in the frame 501. The transfer roller 512 is located between the gravure printing plate roller 511 and the center roller 1, and may be in contact with the gravure printing plate roller 511. The respective shaft ends of the transfer roller 512 and the gravure printing plate roller 511 can be mounted in a mounting block 502 in the frame 501. The mounting block 502 can slide on a slide rail provided in the frame 501. In this way, under the action of the pushing cylinder 506, the mounting block 502 moves in the direction of the center roller 1, so that the transfer roller 512 reaches the center roller 1. Where the fabric 2 to be printed touches. Here, the advancing cylinder 506 may also provide a pressure to bring the transfer roller 512 against the fabric 2 to be printed on the center roller 1. According to the embodiment of the present invention, the pressure provided by each of the pushing cylinders 506 to make the transfer roller 512 abut the fabric 2 to be printed on the central roller 1 may be independently adjustable. The pressure is adjusted by the control system, and can also be gradually increased according to the program, or gradually decreased according to the program. The entire printing color group unit 5 is pushed along the linear slide by the pushing cylinder 506 to realize the clutch with the center roller, and the clutch stroke can reach 2-5cm.

The outer diameter of the gravure printing plate roller 511 can be selected according to the flower pattern of the design pattern, and the outer diameter is usually 95-200 mm. The designed flower pattern is engraved on the outer surface of the gravure printing plate roll 511 by mechanical engraving, electronic engraving, or etching. The gravure printing plate roller 511 is provided with an ink fountain element 510. The ink supply system delivers ink into an ink cavity formed between the ink fountain element 510 and the gravure printing plate roller 511. The gravure printing plate roller 511 may 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 the accuracy of color registration.

Preferably, the transfer roller 512 may be a hard material roller whose surface is covered with rubber. Its surface can be covered with seamless rubber. The rubber is natural rubber, styrene-butadiene rubber, polyurethane rubber or any other rubber with good affinity for water-based ink. Preferably, the surface rubber hardness of the transfer roller 512 is 85-90 degrees, and more preferably 90 degrees.

Since the transfer roller 512 in each printing color group unit 5 is a rubber-coated hard material roller, the outer diameter of the transfer roller 512 is slightly larger than that of the gravure printing plate roller 511, so that a certain tolerance is provided while ensuring the integrity of the 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 pushing action of the pushing device and the pressure of the pressure component; 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 quickly return to its original state. Preferably, the outer diameter of the gravure printing plate roll 511 is less than the outer diameter of the transfer printing roll 512 ≤ the outer diameter of the gravure printing printing roll 511 + 1 mm, that is, the outer diameter of the transfer printing roll 512 is larger than the outer diameter of the gravure printing printing roll 511 , But the difference between the two is below 1 mm. The printing machine according to the present invention has strong pressure bearing capacity, high accuracy, and can fully carry the pattern, thereby ensuring the fineness of the pattern after the transfer. In addition, the compression deformation of the rubber is small, so that it can withstand compression of 10 million times per hour. There will be no compression fatigue during the production cycle and permanent deformation.

The pressing component can be used to provide an adjustable pressure of the transfer roller 512 against the gravure printing plate roller 511. The pressure applying component is used to adjust the ink amount to control the color difference, and the pressure is mainly used to stick out the ink amount in the gravure cell. In the illustrated embodiment, the pressure applying assembly includes an actuator 509 and an eccentric sleeve 503. The actuator 509 includes a cylinder and a piston rod. The cylinder is pivotably connected to the mounting block 502. The actuator 509 may be a hydraulic type, a pneumatic type, or an electric type. When the actuator 509 is of a hydraulic or pneumatic type, the length of the piston rod extension can be adjusted by adjusting the fluid pressure in the cavity of the cylinder. Preferably, the actuator 509 may be a servo actuator 509, such as a servo electric cylinder.

The pressure applying assembly may further include a swing arm 508 and a connecting rod 516. In the illustrated embodiment, the swing arm 508 is pivotally connected to the mounting block 502 by a swing arm pivot 504. The swing arm 508 includes a first end portion and a second end portion. The first end of the swing arm 508 is pivotally connected to the extended end of the piston rod of the actuator 509 through a pin. The second end of the swing arm 508 is pivotally connected to one end of the link 516 through a pin. The other end of the link 516 is pivotally connected to the eccentric bushing 503. Of course, for those skilled in the art, in addition to the swing arm 508-link 516 method described herein, any other transmission method may be used to realize the rotation operation of the eccentric shaft sleeve 503 by the actuator 509. Optionally, a handle may be provided at the end of the swing arm pivot 504 so that the operator can manually adjust the rotation of the eccentric sleeve 503 during the commissioning phase.

In another embodiment according to the present invention, the swing arm 508 may include a first arm portion 5081 and a second arm portion 5082. Both the first arm portion 5081 and the second arm portion 5082 include a first end and a second end. The first end may be a little end, and the second end may be a big end. A first end of the first arm portion 5081 is pivotally connected to a protruding end of a piston rod of the actuator 509 through a pin. A first end of the second arm portion 5082 is pivotably connected to one end of the link 516 through a pin. Neither the first arm portion 5081 nor the second end of the second arm portion 5082 are pivotably connected to the swing arm pivot 504. For example, the second end may be provided with a pivot hole, and the swing arm pivot 504 is fixed to the pivot hole of the second end by means of keyway fitting, positioning pin and pin hole connection, or interference fit. The swing arm pivot 504 is pivotably mounted to the mounting block 502. Preferably, the swing arm pivot axis 504 extends axially outward from the mounting block 502 to form a protruding portion. The protruding portion can be used to connect the second end of the first arm portion 5081 and the second arm portion 5082. The other end of the link 516 is pivotally connected to the eccentric sleeve 503 through a pin.

The eccentric shaft sleeve 503 is sleeve-shaped as a whole, but the center axis of the outer cylindrical surface and the center axis of the inner cylindrical surface are not collinear, that is, the two are offset by a certain distance. The eccentric shaft sleeve 503 is rotatably installed in a shaft sleeve hole of the mounting block 502. In the embodiment shown, the outer diameter of the eccentric bushing 503 is slightly smaller than the inner diameter of the bushing hole. The eccentric shaft sleeve 503 can rotate in the sleeve hole relative to the mounting block 502 around the central axis of the outer cylindrical surface of the eccentric shaft sleeve 503. Optionally, the eccentric shaft sleeve 503 also has a portion extending axially from the mounting block 502 for connecting the other end of the connecting rod 516. Referring to FIG. 4, in an embodiment according to the present invention, the eccentric shaft sleeve 503 can pass through a flange provided at the axially protruding portion and an opposite limit block installed at the other end of the eccentric shaft sleeve 503. It can be rotatably fitted on the mounting block 502 to prevent it from moving axially in the sleeve hole to maintain its rotational stability.

One shaft end of the transfer roller 512 is rotatably mounted in the eccentric shaft sleeve 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 center axis of the outer cylindrical surface of the eccentric sleeve 503 is not collinear with the center axis of the inner cylindrical surface, so that when the eccentric sleeve 503 rotates in the sleeve hole, the center of the inner cylindrical surface of the eccentric sleeve 503 The position of the axis will change accordingly, so the position of the shaft end of the transfer roller 512 in the eccentric sleeve 503 will also change accordingly, and the position of the central axis of the transfer roller 512 will change, resulting in the transfer roller 512 and the gravure The distance between the printing plate rollers 511 changes, which also causes the pressure between them to change. When the eccentric shaft sleeve 503 is rotated to move the transfer roller 512 to a pressing position, the distance between the transfer roller 512 and the gravure printing plate roller 511 is reduced, and the two are pressed together, thereby causing the transfer roller 512 to press. The pressure of the gravure printing plate roller 511. When the eccentric shaft sleeve 503 is rotated to move the transfer roller 512 to the rest position, the distance between the transfer roller 512 and the gravure printing plate roller 511 increases, and the two are released from the pressure (can or do not contact), and the transfer roller 512 No pressure is applied to the gravure printing plate roller 511.

During operation, the transfer roller 512 can be moved to different pressing positions by rotating the eccentric shaft sleeve 503 according to requirements. By rotating the eccentric shaft sleeve 503 to move the transfer roller to different pressing positions, due to the above-mentioned eccentric structure of the eccentric shaft sleeve 503, the distance between the transfer roller 512 and the gravure printing plate roller 511 can be adjusted, thereby adjusting the resulting transfer The roller 512 presses the pressure of the gravure printing plate roller 511. And because rubber has the characteristics of flexibility, resilience, low hardness, etc., the deformation of the transfer roller 512 can be finely controlled by adjusting the generated pressure, so that for printing color registration, it is possible to further improve the color registration accuracy by adjusting the pressing pressure. .

Preferably, in order to make the entire transfer roller 512 uniformly apply pressure to the gravure printing plate roller 511 in the length direction, the other axial end side of the transfer roller 512 is provided with the same another pressing component. More preferably, the actuator 509 on the other axial end side of the transfer roller 512 can be omitted, and only the swing arm 508, the connecting rod 516, and the eccentric sleeve 503 are provided, that is, the two actuators share one actuator 509. The two swing arms 508 on both end sides of the transfer roller 512 are non-rotatably fixed to the swing arm pivot 504, whereby the two swing arms 508 are pivoted synchronously by means of the swing arm pivot 504, thereby realizing two links 516 Synchronous movement of the eccentric sleeve 503.

The eccentric bushing 503 may be set to be initially located in the rest position. When pressure is applied, the actuator 509 is actuated to extend the piston rod, driving the swing arm 508 to pivot about the central axis of the swing arm pivot 504, thereby driving the link 516 connected to the swing arm 508 to move, and the link The movement of 516 in turn drives the eccentric shaft sleeve 503 to rotate, and the eccentric shaft sleeve 503 rotates to move the transfer roller 512 to a pressing position (see FIG. 3), and the distance between the transfer roller 512 and the gravure printing plate roller 511 decreases. The two are pressed against each other, thereby providing the pressure of the transfer roller 512 against the gravure printing plate roller 511. In contrast, when no pressure is required, the actuator 509 is actuated to retract the piston rod, and the swing arm 508 is driven to pivot about the central axis of the swing arm pivot 504, thereby driving the link 516 connected to the swing arm 504 to move. The movement of the connecting rod 516 in turn drives the eccentric shaft sleeve 503 to rotate. The eccentric shaft sleeve 503 rotates to move the transfer roller 512 to the rest position. The distance between the transfer roller 512 and the gravure printing plate roller 511 increases, and the two are disengaged. By pressing, the transfer roller 512 no longer applies pressure to the gravure 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 axis of the center roller 1, the transfer roller 512, and the gravure printing plate roller 511 are parallel. Preferably, the axes of the three may not be coplanar. As can be seen from the schematic diagrams of Figures 2 and 3, the axes of the three are not collinear. Preferably, the axis line of the three forms an included angle ranging from 130 to 170 degrees, and the included angle is preferably 146 degrees or 147 degrees. In addition, it can be seen from the schematic diagram of FIG. 3 that the swing arm pivot 504 is generally disposed on the printing plate roller 511 on the side opposite to the transfer roller side. That is, the axial centers of the printing plate roller 511, the transfer roller 512, and the swing arm pivot 504 are arranged in a triangle. The advantage of this arrangement is that the size of the printing color group unit 5 in a direction perpendicular to the axis of the center roller 1 can be reduced, so that the frame 501 and the mounting block 502 are compact in structure; in addition, parts are easy to maintain and replace.

Moreover, when the mounting block 502 moves in the direction of the center roller 1 under the action of the pushing cylinder 506, as shown in FIG. 5, the direction in which the transfer roller 512 presses the pressing force F1 of the center roller 1 is parallel to the length direction of the slide rail. , That is, parallel to the longitudinal centerline of the printing color group unit 5. The pushing force F1 can be decomposed into two components, vertical and tangential. The vertical component refers to the actual printing embossing force F2 that is perpendicular to the outer peripheral surface of the center roller, that is, toward the center of the center roller, and the magnitude of this printing embossing force is reflected in the amount of rubber deformation of the rubber roller. The tangential component is a tangential component force F3 which is tangential to the outer peripheral surface of the center roller. The tangential component force F3 has a certain effect on the tangential deformation of the rubber roll cover, but has a small effect on the deformation of the printed pattern. For the same batch of printing operations, the required printing embossing force F2 should remain unchanged. Therefore, when the angle β between the center line of the transfer roller 512-center roller 1 and the horizontal line is determined, the pressing force F1 It is related to the magnitude of the tangential component force F3 and the included angle α between the longitudinal centerline and the horizontal line of the printing color group unit 5. The smaller the included angle α, the larger the pressing force F1 and the tangential component force F3; otherwise, the included angle The larger α is, the smaller the pressing force F1 and the tangential component force F3 are. By providing the tangential component force F3, the tangential deformation of the rubber roller coating can be controlled.

In an embodiment, the included angle α between the longitudinal centerline and the horizontal line of the printing color group unit 5 may be 0-90 degrees, and preferably 15 degrees. The included angle between the central line of the plate roller and the transfer roller and the longitudinal center line of the printing color group unit 5 may be 4 to 35 degrees, and preferably 23 degrees.

Preferably, the printing color group unit 5 may further include a pressure locker 517 for locking the pressure between the transfer roller 512 and the gravure printing plate roller 511, thereby avoiding the pressure value caused by the unevenness of the surface of the fabric 2 during the production process. Micro beating. The pressure locker 517 may include a variable-length member having one end pivotably connected to the eccentric sleeve 503 and the other end pivotably fixed to the mounting block 502. The length of this component changes with the rotation of the eccentric sleeve 503. When the pressure of the transfer roller 512 against the gravure printing plate roller 511 is adjusted to a desired value by the actuator 509 as required, 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 printing plate roller 511 constant.

Taking the cotton fabric 2 as an example, the operation process of the paperless transfer printing machine according to the present invention will be briefly described below.

The fabric 2 to be printed is unrolled from the raw material cloth basket through the tight cloth frame 201 under the traction of the active traction device 602, and enters the dust removal unit 300 to brush off the dust on the fabric 2; the dust-removed fabric 2 is then actively expanded by double rollers Web device 401 expansion, centering device 601 centering, tension controller 603 centering (after feeding) tension control, corona processor 1100 corona treatment on fabric 2 surface, and tension lever device 604 Tension control before sizing, enlarge again by sizing device 402 before sizing, then enter sizing device 701, sizing and dehumidification device 702 to dehumidify; the dehumidified fabric 2 transfers the tension before printing through another tension lever device 604 After control, it is precisely positioned laterally via the correction device 802. The frequency conversion motor 13 drives the center roller 1 to rotate, and drives the fabric 2 to enter between the center roller 1 and each printing color group unit 5 through the guide of the guide roller 4. The pushing cylinder 506 applies a pushing force to cause the mounting block 502 in the printing color group unit 5 to move in the direction of 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 blades of the ink fountain element 510 move toward and abut against the gravure printing plate roller 511, and an ink cavity is formed therebetween. The ink in the ink cavity is printed on the transfer roller 512 by the gravure printing plate roller 511. The transfer roller 512 transfers the pattern to the fabric 2 again. The drying box 7 located between each printing color group unit 5 can be opened to ensure that the ink is dry after printing and prevent the phenomenon of color cross-talk between multiple sets of colors. After the printing of each printing color group unit 5 is completed, the color printing is completed, and finally, it is led out by another guide roller 4 and enters the drying unit 1000 for drying. The dried fabric enters the tension swing arm device 605 to perform the tension control of the oven (out of the traction), and then is pulled and rolled into the finished fabric basket by the cloth drop traction device 202.

The high-definition image detection unit 900 immediately captures the printed pattern and sends it to the central control unit for processing, and then displays the image signal through the liquid crystal display to provide the operator with the ability to monitor the quality of the printed matter and improve the yield.

If the fabric 2 is thin, the ink may penetrate the fabric 2 and cause the ink to stain the surface of the center roller 1. In this case, the center roller cleaning system 15 can be used to clean and dry the surface of the center roller 1 for loop use.

During the transfer printing, the pressure of the transfer roller 512 against the gravure printing plate roller 511 is provided by the pressure applying component, thereby ensuring a good printing effect. By adjusting the pressing pressure of the pressing component, the deformation of the transfer roller 512 can be finely controlled according to the needs and different fabrics, so that the registration accuracy can be further improved by adjusting the pressing pressure.

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

The paperless transfer printing machine according to the present invention achieves good results in terms of production capacity and product quality through the production and application of transfer printing products. Each printing color group unit can independently pressure contact or disengage the center roller by means of its own pushing device, so that other printing color group units can continue to transfer printing and can independently adjust the pressure against the center roller. The transfer roller is used as the transfer temporary carrier without the consumption of paper consumables, which not only reduces the running cost, but also is environmentally friendly, economical and practical. In addition, the paperless transfer printing machine of the present invention can realize high-speed transfer printing production, and the printing speed can be as high as 30-60 m / min.

Although the invention has been shown and described with reference to specific exemplary embodiments, the invention is not limited by these exemplary embodiments. It should be recognized that those skilled in the art can make changes and modifications to these exemplary embodiments without departing from the scope and spirit of the present invention as defined by the scope of the patent application or its equivalents.

100‧‧‧printing unit
1‧‧‧ center roller
12‧‧‧ Rack
13‧‧‧ Variable Frequency Motor
15‧‧‧center roller cleaning system
2‧‧‧ Fabric
201‧‧‧Tight Cloth Rack
202‧‧‧Dropping device
4‧‧‧Guide roller
7‧‧‧ Oven
300‧‧‧ Dust removal unit
401‧‧‧Double Roller Active Amplifier
402‧‧‧Amplifier before sizing
5‧‧‧Printing color group unit
501‧‧‧frame
502‧‧‧Mounting block
503‧‧‧eccentric shaft sleeve
504‧‧‧ swing arm pivot
506‧‧‧Propulsion cylinder
508‧‧‧arm swing
5081‧‧‧First arm
5082‧‧‧Second Arm
509‧‧‧Actuator
510‧‧‧Ink fountain element
511‧‧‧gravure printing plate roller
512‧‧‧ transfer roller
516‧‧‧ connecting rod
517‧‧‧Pressure lock
601‧‧‧centering device
602‧‧‧active traction device
603‧‧‧Tension controller
604‧‧‧ Tension lever device
605‧‧‧tension swing arm device
701‧‧‧sizing device
702‧‧‧ Dehumidifier
801‧‧‧Correction sensor
802‧‧‧Correction device
900‧‧‧HD image detection unit
1000‧‧‧ drying unit
1100‧‧‧Corona Processor
F1‧‧‧ pushing force
F2‧‧‧print embossing force
F3‧‧‧ Tangential component force α‧‧‧ angle β‧‧‧

1 is an overall schematic diagram of a paperless transfer printing machine according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a printing unit of a paperless transfer printing machine according to an embodiment of the present invention. 3 is a schematic diagram of a single printing color group unit of a printing unit according to this embodiment of the present invention. 4 is a cross-sectional view of a single printing color group unit of the printing unit according to the embodiment of the present invention, taken along an axial direction of an actuator, a swing arm, a connecting rod, an eccentric shaft sleeve and the like. 5 is a schematic diagram of the relationship between the force and position of the printing color group unit and the center roller according to the present invention.

Claims (12)

A paperless transfer printing machine includes: a printing unit for registering a fabric to be printed; a take-up and unwinding unit for unwinding the fabric to be printed and performing printing on the printed fabric Rewinding; a dust removal unit for dust removal and cleaning of the fabric to be printed; an expansion unit for horizontally unrolling the fabric to be printed, the expansion unit is controlled by an expansion motor and an expansion roller Rotate the fabric to be printed horizontally. A tension unit is used to control the tension state of the fabric during the entire printing process from unwinding to rewinding. The tension unit includes a force controller located downstream of the unwinding process. A force swing bar device upstream of the printing unit and a force swing arm device downstream of a drying unit; a sizing and dehumidifying unit for sizing and dehumidifying the fabric for subsequent coloring, and The tension swing rod device is provided upstream and downstream of the pulp and dehumidification unit; a correction unit, which corrects the fabric to be printed entering the printing unit for determining The fabric is accurately positioned in the transverse direction and the longitudinal tension is suitable; and the drying unit is used to dry the printed fabric; wherein, the printing unit includes: a center roller, which is mounted on a frame, The center roller is a hard material roller whose surface is covered with a rubber and cavity is filled with oil. The hard material roller is heated by an electric heating rod built in the cavity to control the temperature of the center roller; and at least one printing color group unit. The at least one printing color group unit is distributed around the circumference of the center roller, and the fabric to be printed enters between the center roller and each of the printing color group units for printing, wherein each of the printing color group units includes a pre-made flower. A printing plate roller of a pattern and a transfer roller for transferring the flower pattern on the printing plate roller to the fabric to be printed, the transfer roller is located between the printing plate roller and the center roller, and the transfer roller The axes of the printing plate roller and the center roller are parallel to each other but not coplanar. Each printing color group unit further includes a pressure for locking the pressure between the transfer roller and the printing plate roller. Setter. The paperless transfer printing machine according to claim 1, wherein the transfer roller is another hard material roller whose surface is covered with another rubber, and the surface rubber hardness of the transfer roller is 85-90 degrees. The paperless transfer printing machine according to claim 2, wherein the rubber is natural rubber, styrene-butadiene rubber, urethane rubber, or any other rubber with good affinity for water-based ink. The paperless transfer printing machine according to claim 1, wherein the outer diameter of the printing plate roller is less than the outer diameter of the transfer roller ≤ the outer diameter of the printing plate roller + 1 mm. The paperless transfer printing machine according to claim 1, wherein each of the printing color group units further includes a pressure applying component for adjustingly providing the pressure of the transfer roller against the printing plate roller, Wherein, the pressing component can selectively move the transfer roller to a pressing position and a rest position, in which the transfer roller presses against the printing plate roller, thereby causing the transfer roller to press against the Pressure of the printing plate roller; in the rest position, the transfer roller does not press against the printing plate roller, the pressure applying components are provided on the two shaft end sides of the transfer roller, and a swing arm and The other swing arm on the other shaft end side is pivoted synchronously by means of the same swing arm pivot, thereby realizing the synchronous movement of two connecting rods and an eccentric shaft sleeve, thereby maintaining synchronization of the two shaft ends of the printing plate roller. Pressure; only one of the pressure components located on the two shaft end sides of the transfer roller includes an actuator for driving the swing arm to pivot. The paperless transfer printing machine according to claim 5, wherein the pressure applying component includes the eccentric shaft sleeve rotatable, and the shaft end of the transfer roller is rotatably installed in the eccentric shaft sleeve, and by rotating the eccentric shaft The sleeve can adjust the distance between the transfer roller and the printing plate roller, thereby adjusting the pressure of the transfer roller against the printing plate roller. The paperless transfer printing machine according to claim 6, wherein the transfer roller can be selectively moved to a plurality of the pressing positions by rotating the eccentric sleeve. The paperless transfer printing machine according to claim 6, wherein the pressure applying component further includes the link for driving the eccentric shaft sleeve to rotate and the swing arm for moving the link. One end is connected to the eccentric shaft sleeve, and the other end of the link is connected to the swing arm. The swing arm can be pivoted relative to the body of the printing color group unit through a swing arm pivot. The swing arm includes a first arm. And a second arm portion, each of the first arm portion and each of the second arm portion including a first end and a second end, the first end of the first arm portion being pivotally connected to the The extended end of the actuator, the first end of the second arm portion is pivotally connected to the other end of the link through the pin, the first arm portion and the second end of the second arm portion Neither is rotatably fixed to the pivot of the swing arm. The paperless transfer printing machine according to claim 8, wherein the pressure applying component further comprises the actuator, which drives the pivot of the swing arm, and the pivot of the swing arm causes the link to drive the link The eccentric shaft sleeve rotates, thereby moving the transfer roller to the pressing position or the rest position. The paperless transfer printing machine according to claim 1, wherein the printing plate roller is a gravure printing plate roller, a flexographic printing plate roller, a rotary screen printing plate roller or an offset printing plate roller. The paperless transfer printing machine according to claim 1, wherein each of the printing color group units further includes a pushing device for providing a pushing force for advancing the transfer roller toward the center roller, and the pushing device is installed on the printing On a frame of the color group unit, each of the printing color group units can independently advance or leave toward the center roller by means of the respective pushing device, and the pushing device also provides the standby roller that makes the transfer roller abut against the center roller. Independently adjustable pressure of printed fabric. The paperless transfer printing machine according to claim 11, wherein each of the printing color group units further includes the frame, and a mounting block is disposed in the frame, and the transfer roller and the printing plate roller are rotatably mounted to the mounting block. In the pushing action of the propulsion device, the mounting block can move toward the center roller in the frame, and a slide rail is provided in the frame, and the mounting block can slide on the slide rail.