A constant temperature ink printing device based on four-color printing

Abstract

The application relates to a constant-temperature ink printing device based on four-color printing, which is applied to the technical field of printing devices. A rack is provided with a feeding mechanism and a collecting mechanism for placing a cloth roll to be printed. A first printing mechanism and a second printing mechanism are sequentially arranged between the feeding mechanism and the collecting mechanism. The end of the cloth roll is fixed to the collecting mechanism after sequentially passing through the feeding mechanism, the first printing mechanism and the second printing mechanism. A cleaning mechanism is arranged at the first printing mechanism and the second printing mechanism of the rack respectively, and the cleaning mechanism is used for cleaning ink on the first printing mechanism and the second printing mechanism. The application has the effect that the cloth reciprocally moves between the first printing mechanism and the second printing mechanism, the first printing mechanism and the second printing mechanism alternately print on the cloth, the length of the production line is shortened, and the production area occupied by the printing device is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing devices, and particularly relates to a constant-temperature ink printing device based on four-color printing. BACKGROUND

[0002] Four-color printing is a method for realizing full-color copying according to subtractive color mixing principle by using red, green and blue three primary colors and black (ink or dye). When printing on an article by using the four-color printing method, a printing device usually needs to be used.

[0003] A printing device in the related art, for example, a clothing automatic four-color printing machine disclosed by CN110027310A of the State Intellectual Property Office on July 19, 2019, comprises a feeding mechanism and a conveying belt, a machine box is arranged at the rear side of the feeding mechanism, a first color printing section, a second color printing section, a third color printing section and a fourth color printing section are sequentially arranged on the machine box, a water tank is arranged in the machine box, the conveying belt sequentially passes through the feeding mechanism, the first color printing section, the second color printing section, the third color printing section, the fourth color printing section, a drying section and the collecting mechanism.

[0004] However, when printing clothes by using the four-color printing machine in the related art, the clothes to be printed need to sequentially pass through the first color printing section, the second color printing section, the third color printing section, the fourth color printing section and the drying section to complete the printing, the production line is long, and a large production area is occupied in the factory. SUMMARY

[0005] In order to solve the problems of long production line and large production area occupied in the factory of the four-color printing machine in the related art, the present application provides a constant-temperature ink printing device based on four-color printing.

[0006] The constant-temperature ink printing device based on four-color printing provided by the present application adopts the following technical scheme:

[0007] A constant-temperature ink printing device based on four-color printing comprises a rack, a feeding mechanism and a collecting mechanism for placing a cloth roll to be printed are arranged on the rack, a first printing mechanism and a second printing mechanism are sequentially arranged between the feeding mechanism and the collecting mechanism, and the end of the cloth roll sequentially passes through the feeding mechanism, the first printing mechanism and the second printing mechanism and is fixed to the collecting mechanism.

[0008] A cleaning mechanism is arranged at each of the first printing mechanism and the second printing mechanism on the rack, and the cleaning mechanism is used for cleaning ink on the first printing mechanism and the second printing mechanism.

[0009] By adopting the technical scheme, one end of the cloth is fixed on the feeding mechanism, the other end is fixed on the collecting mechanism, the feeding mechanism and the collecting mechanism always rotate in the same direction, the cloth is transmitted back and forth between the feeding mechanism and the collecting mechanism, the first printing mechanism and the second printing mechanism work alternately in the process, and the cloth is printed by using four-color printing technology. The cleaning mechanism cleans the surface of the printing mechanism in time after the first printing mechanism and the second printing mechanism finish printing, so as to reduce the color mixing in the printing process. The whole printing process only needs to use the first printing mechanism and the second printing mechanism, which shortens the length of the production line and reduces the production area required by the printing device.

[0010] Optionally, the first printing mechanism comprises a printing roller, the cloth is wound on the printing roller, the printing roller is rotatably installed on the rack, and the rack is provided with a coating assembly, the coating assembly is in close contact with the printing roller, and the surface of the printing roller is coated with ink.

[0011] By adopting the technical scheme, the coating assembly is in close contact with the surface of the printing roller, and the ink on the surface of the printing roller is continuously coated in the rotating process of the printing roller. The ink on the printing roller is printed on the cloth in the rotating process, and patterns are formed.

[0012] Optionally, the coating assembly comprises an ink cartridge arranged on the rack, the ink cartridge is provided with a partition plate, the partition plate divides the ink cartridge into a first accommodating cavity and a second accommodating cavity, and the first accommodating cavity and the second accommodating cavity store ink.

[0013] A liquid permeation groove is arranged in the cavity wall of the first accommodating cavity and the second accommodating cavity of the ink cartridge, a coating piece is embedded on the ink cartridge at the liquid permeation groove, the coating piece is adapted to block the liquid permeation groove, one end of the coating piece extends into the ink cartridge, and the other end is in contact with the printing roller.

[0014] By adopting the technical scheme, the partition plate is installed in the ink cartridge, the interior of the ink cartridge is divided into the first accommodating cavity and the second accommodating cavity, different colors of ink are respectively filled in the first accommodating cavity and the second accommodating cavity, the ink is permeated out through the liquid permeation groove, the ink on the coating piece is continuously printed on the cloth in the rotating process of the printing roller.

[0015] In addition, the coating piece is adapted to block the liquid permeation groove, and also blocks the ink in the ink cartridge, so that the ink is not easily accidentally permeated out and pollutes the cloth in the printing process.

[0016] Optionally, the ink cartridge is installed on the rack through a deflection assembly, the deflection assembly comprises a control motor arranged on the rack, one end of the ink cartridge is fixed on the output shaft of the control motor, and the other end is rotatably installed on the rack.

[0017] By adopting the technical scheme, when one of the inks in the ink box needs to be used in the printing process, the control motor drives the ink box to rotate, so that the coating member on the side abuts against the surface of the printing roller, and the surface of the printing roller is continuously coated with ink during the rotation of the printing roller.

[0018] Similarly, when another color of ink needs to be used, the control motor is used again to drive the ink box to rotate, so that the coating member on the other side abuts against the other side of the printing roller, and the process of replacing the ink is quickly completed.

[0019] Optionally, the cleaning mechanism comprises a supporting assembly and a cleaning assembly, the supporting assembly moves up and down along the height direction of the rack, when the supporting assembly operates to the maximum height, the height of the supporting assembly is higher than the printing roller, and the cleaning assembly abuts against the printing roller to scrape the surface of the printing roller.

[0020] By adopting the technical scheme, during the replacement of the ink, the two supporting assemblies alternately support the cloth, so that the cloth at the running supporting assembly does not contact the surface of the printing roller to be cleaned, so that the cleaning assembly cleans the surface of the printing roller, and the cleaning work of the printing roller is completed.

[0021] Optionally, the supporting assembly comprises a supporting shaft, and a supporting cylinder is arranged at each end of the supporting shaft, and the supporting cylinder is fixed on the rack to drive the supporting shaft to move up and down.

[0022] By adopting the technical scheme, the supporting cylinder drives the supporting shaft to move up and down, and the adjustment of the position of the cloth is completed.

[0023] Optionally, the cleaning assembly comprises a scraping plate, the scraping plate abuts against the side wall of the printing roller, a sliding rail is fixed on the rack, the sliding rail is arranged parallel to the printing roller, a connecting rod is arranged on the scraping plate, a sliding block is arranged at the end of the connecting rod away from the scraping plate, and the sliding block is slidingly installed in the sliding rail.

[0024] One end of the sliding rail is provided with a driving motor, a driving screw is arranged in the sliding rail, the driving screw is arranged along the length direction of the sliding rail, the output shaft of the driving motor penetrates the side wall of the sliding rail and is coaxially connected with the driving screw, the driving screw penetrates the sliding block and is threadedly connected with the sliding block.

[0025] By adopting the technical scheme, the driving motor drives the driving screw to rotate, drives the sliding block to move, so that the sliding block moves in the sliding rail, drives the scraping plate to scrape the surface of the printing roller, and cleans the surface of the printing roller.

[0026] Optionally, the feeding mechanism comprises a feeding roller rotatably mounted on the frame, the feeding roller is provided with a connecting assembly for fixing the cloth, the frame is provided with a feeding motor, an output shaft of the feeding motor is coaxially fixed with the feeding roller and drives the feeding roller to rotate, so that the cloth is wound on the feeding roller.

[0027] By adopting the above technical scheme, the cloth is fixed on the feeding roller through the connecting assembly, and the feeding motor drives the feeding roller to rotate, so that the cloth is wound on the feeding roller.

[0028] Optionally, the connecting assembly comprises a connecting section, one side of the connecting section is fixed on the feeding roller, and the other side is provided with a clamping piece, the clamping piece fixes the cloth on the connecting section.

[0029] The clamping piece comprises a fixed hoop, a pair of locking rings and a pair of clamping pieces, the fixed hoop is sleeved and fixed on the side of the connecting section away from the feeding roller, the pair of clamping pieces are overlapped with each other and hinged with the fixed hoop, each end of the clamping piece is provided with a tooth, the teeth on the pair of clamping pieces are engaged with each other, the locking ring is sleeved at the end position of the pair of clamping pieces, and a fixing bolt is provided on the locking hoop, the fixing bolt clamps the pair of clamping pieces.

[0030] By adopting the above technical scheme, the connecting section is fixed on the feeding roller, and the clamping piece connects the cloth, in the printing process, the connecting section is wound on the printing roller as an extension of the cloth, so that the two ends of the cloth can also be printed with patterns.

[0031] In addition, each end of the clamping piece is provided with a tooth, and the pair of teeth are engaged with each other, so that the pair of clamping pieces rotate synchronously, which is convenient for the operator to clamp the cloth. At the same time, the fixing bolt clamps the pair of clamping pieces, and the detachable fixing of the cloth is completed, so that the cloth is always in a tight state during the printing process and is not easy to slip off the clamping piece.

[0032] Optionally, the frame is provided with a drying assembly at the printing roller, the drying assembly comprises a plurality of drying rollers, the drying rollers are arranged at intervals with the printing roller, the drying roller has a heating cavity inside, the heating cavity is provided with an electric heating wire, and the electric heating wire is spirally arranged on the inner wall of the heating cavity.

[0033] By adopting the above technical scheme, the electric heating wire is arranged in the heating cavity for continuous heating, so that the drying roller is heated, and the cloth printed by the printing roller is dried in time by the high temperature of the drying roller when passing through the drying roller, so that the ink on the cloth is not easy to contaminate each other during the winding process, and the appearance of the cloth product is improved.

[0034] In summary, the present application has at least one of the following beneficial technical effects:

[0035] 1. One end of the cloth is fixed on the feeding mechanism, and the other end is fixed on the receiving mechanism. The feeding mechanism and the receiving mechanism always rotate in the same direction, and the cloth is transmitted back and forth between the feeding mechanism and the receiving mechanism. In this process, the first printing mechanism and the second printing mechanism work alternately, and the cloth is printed by using four-color printing technology. Only the first printing mechanism and the second printing mechanism are used in the whole printing process, which shortens the length of the production line and reduces the production area required by the printing device;

[0036] 2. The partition is installed in the ink box, which divides the inside of the ink box into a first containing cavity and a second containing cavity. Different colors of ink are respectively filled in the first containing cavity and the second containing cavity. The ink penetrates out through the liquid penetration groove and penetrates onto the coating piece by using the capillary phenomenon. The ink on the coating piece is continuously printed onto the cloth during the rotation of the printing roller;

[0037] 3. The connecting section is fixed on the feeding roller, and the clamping piece connects the cloth. During the printing process, the connecting section is extended as the cloth and is wound on the printing roller, so that the two ends of the cloth can also be printed with patterns. At the same time, the connecting section is wound on the printing roller, which also cleans the printing roller and reduces the occurrence of color mixing of the patterns printed by the printing roller. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is the running state diagram of the constant-temperature ink printing device based on four-color printing in the embodiment of the application.

[0039] Figure 2 is a schematic diagram of the constant-temperature ink printing device in the embodiment of the application.

[0040] Figure 3 is Figure 1 the enlarged view of part A in FIG. 4.

[0041] Figure 4 is a schematic diagram of the first printing mechanism and the cleaning mechanism in the embodiment of the application.

[0042] Figure 5 is a sectional view of the drying roller in the embodiment of the application.

[0043] Figure 6 is a sectional view of the ink box in the embodiment of the application.

[0044] Fig. 1 is a frame; 2 is a feeding mechanism; 21 is a feeding roller; 22 is a connecting assembly; 221 is a connecting section; 222 is a clamping piece; 2221 is a fixing hoop; 2222 is a clamping piece; 2223 is a tooth; 2224 is a fixing bolt; 2225 is a locking ring; 23 is a feeding motor; 3 is a receiving mechanism; 4 is a first printing mechanism; 41 is a printing roller; 42 is a coating assembly; 421 is an ink box; 4211 is a liquid permeation groove; 422 is a partition plate; 423 is a coating piece; 5 is a second printing mechanism; 6 is a deflection assembly; 61 is a control motor; 7 is a cleaning mechanism; 71 is a supporting assembly; 711 is a supporting shaft; 712 is a supporting cylinder; 72 is a cleaning assembly; 721 is a scraping plate; 722 is a sliding rail; 723 is a connecting rod; 724 is a sliding block; 725 is a driving motor; 726 is a driving screw; 8 is a drying assembly; 81 is a drying roller; 811 is a heating cavity; 82 is an electric heating wire; 9 is a first accommodating cavity; 10 is a second accommodating cavity. DETAILED DESCRIPTION

[0045] The drawings will be described below Figures 1-6 The application is further described in detail.

[0046] The application discloses a constant-temperature ink printing device based on four-color printing.

[0047] Reference Figure 1 A constant-temperature ink printing device based on four-color printing, comprising a frame 1, one end of the frame 1 is provided as a feeding end, and the other end is provided as a discharging end. A feeding mechanism 2 is arranged on the feeding end of the frame 1, and a receiving mechanism 3 is arranged on the discharging end, and a first printing mechanism 4 and a second printing mechanism 5 are sequentially arranged between the feeding mechanism 2 and the receiving mechanism 3, before printing, a cloth roll is placed on the feeding mechanism 2, and then the end part of the cloth is sequentially wound around the first printing mechanism 4 and the second printing mechanism 5, and finally fixed on the receiving mechanism 3.

[0048] Reference Figure 1 and Figure 2 During the printing process, the first printing mechanism 4 and the second printing mechanism 5 are alternately used, and the cloth is reciprocally conveyed between the feeding mechanism 2 and the receiving mechanism 3, and each time the cloth is conveyed, one color is printed on the cloth, so that the printing work of the cloth can be completed only by reciprocally conveying twice, the length of the production line is shortened, and the production occupied area of the printing device is reduced.

[0049] Reference Figure 1 The feeding mechanism 2 comprises a feeding roller 21, the feeding roller 21 is detachably rotatably installed on the frame 1, and the cloth is wound on the feeding roller 21. The feeding roller 21 in the application is a steel roller made of stainless steel material, the frame 1 is provided with a feeding motor 23 for driving the feeding roller 21 to rotate, and the surface of the feeding roller 21 is covered with a rubber layer for increasing the friction of the surface of the feeding roller 21.

[0050] Referring to Figure 1 and Figure 3 , the feeding mechanism 2 further comprises a connecting assembly 22 mounted on the feeding roller 21, the connecting assembly 22 comprising a connecting section 221, which is made of cotton cloth material with strong water absorption in the embodiment of the application, one end of the connecting section 221 is adhered to the feeding roller 21 by structural adhesive to fix the connecting section 221 and the feeding roller 21, and the other end is provided with a clamping piece 222 for fixing the cloth.

[0051] Referring to Figure 3 , in particular, the clamping piece 222 comprises a fixing hoop 2221 sleeved and fixed on the end of the connecting section 221 away from the feeding roller 21, and a pair of clamping pieces 2222 are hinged to the fixing hoop 2221, and the pair of clamping pieces 2222 are arranged in mutual superposition. The two ends of each clamping piece 2222 are integrally formed with a clamping tooth 2223, and the clamping teeth 2223 on the pair of clamping pieces 2222 are mutually clamped, so that the pair of clamping pieces 2222 are collectively clamped on the cloth to clamp and fix the cloth.

[0052] After the pair of clamping pieces 2222 are collectively clamped on the cloth, a locking ring 2225 is sleeved on the two ends of the pair of clamping pieces 2222, and a fixing bolt 2224 is threaded through the locking ring 2225. The end of the cloth is smoothly placed between the pair of clamping pieces 2222, and the fixing bolt 2224 is tightened, so that the cloth is fixed between the pair of clamping pieces 2222, and the cloth is clamped and is not easy to slip out of the pair of clamping pieces 2222.

[0053] Referring to Figure 1 and Figure 3 , the material collecting mechanism 3 in the embodiment of the application is the same as the feeding mechanism 2 described above, and the feeding motor 23 of the material collecting mechanism 3 and the feeding mechanism 2 rotates at the same speed in the same direction to convey the cloth back and forth between the two feeding rollers 21 to complete the printing process.

[0054] Referring to Figure 2 and Figure 4 , the first printing mechanism 4 and the second printing mechanism 5 in the embodiment of the application are the same in structure, and the only difference is that the colors of the inks used by the first printing mechanism 4 and the second printing mechanism 5 are different, so only the first printing mechanism 4 is introduced as an example in the application.

[0055] The first printing mechanism 4 comprises a printing roller 41 and a coating assembly 42 for coating ink on the surface of the printing roller 41, the surface of the printing roller 41 is densely covered with patterns, and the printing roller 41 is detachably mounted on the rack 1 to facilitate the operator to replace the printing roller 41 at any time to print different patterns. The coating assembly 42 uniformly coats the ink on the printing roller 41, and the surface of the cloth is printed with exquisite patterns during the conveying process.

[0056] With reference to Figure 4 Specifically, the coating mechanism comprises an ink box 421, which is rotatably installed on the frame 1 through a deflection assembly 6. In the present application, the deflection assembly 6 is a control motor 61, which is installed on the frame 1. The output shaft of the control motor 61 penetrates through one side wall of the frame 1 and is coaxially fixed with the ink box 421. The end of the ink box 421 away from the control motor 61 is rotatably installed on the other side wall of the frame 1.

[0057] With reference to Figure 4 and Figure 5 The ink box 421 is provided with a partition 422, which divides the internal space of the ink box 421 into a first accommodating cavity 9 and a second accommodating cavity 10. The first accommodating cavity 9 and the second accommodating cavity 10 are respectively filled with different colors of ink.

[0058] With reference to Figure 4 and Figure 5 The cavity wall of the first accommodating cavity 9 and the second accommodating cavity 10 is respectively provided with a liquid permeation groove 4211. In the present application, the liquid permeation groove 4211 is a long and narrow waist-shaped groove, which is arranged along the length direction of the ink box 421. A coating piece 423 is fitted and embedded in the liquid permeation groove 4211. In the present application, the coating piece 423 is a sponge sheet. One end of the coating piece 423 extends into the ink box 421 to absorb the ink in the ink box 421 by capillary phenomenon. The other end of the coating piece 423 abuts against the side surface of the printing roller 41 along with the rotation of the ink box 421.

[0059] With reference to Figure 4 When it is needed to change the color of the pattern printed by the printing roller 41, the control motor 61 is started to drive the ink box 421 to rotate, so that the coating piece 423 on the corresponding side of the ink box 421 abuts against the surface of the printing roller 41, and the color changing work is quickly completed.

[0060] With reference to Figure 2 and Figure 3 In addition, in order to prevent the surface of the printing roller 41 after color changing from being easily left with the previous color, which may cause color confusion and affect the aesthetic degree of the pattern printed on the fabric, a cleaning mechanism 7 is arranged on the frame 1 at the printing roller 41 in the present application. The cleaning mechanism 7 comprises a cleaning assembly 72 and a supporting assembly 71, which supports and lifts the fabric to separate the fabric from the surface of the printing roller 41 to be cleaned, so that the cleaning assembly 72 can clean the printing roller 41.

[0061] With reference to Figure 2Specifically, the supporting assembly 71 comprises a supporting shaft 711, and one supporting cylinder 712 is arranged at each end of the supporting shaft 711 and is arranged in a vertical direction and fixed on the rack 1 to drive the supporting shaft 711 to move up and down and support the cloth so that the cloth is not in contact with the surface of the printing roller 41 to facilitate cleaning work. The supporting cylinder 712 in the application is a common single-acting cylinder on the market.

[0062] With reference to Figure 2 and Figure 3 The cleaning assembly 72 comprises a scraping plate 721, the side surface of the scraping plate 721 is arc-shaped and matched with the side surface arc of the printing roller 41, the scraping plate 721 is made of silica gel, and a flocking strip is bonded to the surface of the scraping plate 721 matched with the printing roller 41 to further improve the cleaning effect.

[0063] With reference to Figure 2 and Figure 4 The cleaning assembly 72 further comprises a sliding rail 722 welded on the rack 1, the sliding rail 722 is arranged in the width direction of the rack 1, that is, parallel to the printing roller 41, a sliding block 724 is slidingly installed in the sliding rail 722, a connecting rod 723 is integrally formed on the sliding block 724, and one end of the connecting rod 723 away from the sliding block 724 is integrally formed on the scraping plate 721.

[0064] With reference to Figure 4 In addition, a driving screw rod 726 is arranged in the sliding rail 722 in the length direction of the sliding rail 722, the driving screw rod 726 penetrates through the sliding block 724 and is threadedly connected with the sliding block 724. A driving motor 725 is installed on the rack 1, the output shaft of the driving motor 725 penetrates into the sliding rail 722 and is coaxially welded with the driving screw rod 726, the driving motor 725 drives the driving screw rod 726 to rotate and drives the sliding block 724 to reciprocatingly move along the length direction of the sliding rail 722, and in this process, the scraping plate 721 repeatedly scrapes the surface of the printing roller 41 to clean the printing roller 41.

[0065] With reference to Figure 2 and Figure 4 During the printing process of the printing roller 41, the driving motor 725 drives the scraping plate 721 to stop at the end position of the sliding rail 722 to reduce the influence of the arrangement of the scraping plate 721 on the printing work of the printing roller 41.

[0066] With reference to Figure 1 and Figure 2 In addition, since the cloth is printed based on the four-color printing technology in the application, it is difficult to ensure that the cloth can be in a dry state to enter the printing process of the next color after each printing, therefore, in order to accelerate the drying speed of the cloth, the drying assembly 8 is arranged on the rack 1 in the application.

[0067] With reference to Figure 2 andFigure 6 Specifically, the drying assembly 8 comprises three drying rollers 81 which are arranged in parallel with the pair of printing rollers 41 and are rotatably mounted on the rack 1, and the cloth passes through the drying rollers 81 and the printing rollers 41 in sequence. The drying rollers 81 are hollow and form heating cavities 811 in the interiors, and the heating cavities 811 are provided with electric heating wires 82 which are arranged in a spiral shape on the inner walls of the heating cavities 811 and continuously heat the drying rollers 81, so that the cloth passing through the drying rollers 81 is quickly dried.

[0068] The implementation principle of the constant-temperature ink printing device based on four-color printing according to the embodiment of the application is as follows: one end of the cloth is fixed on the feeding mechanism 2, and the other end is fixed on the collecting mechanism 3; the feeding mechanism 2 and the collecting mechanism 3 always rotate in the same direction; the cloth is driven back and forth between the feeding mechanism 2 and the collecting mechanism 3; the first printing mechanism 4 and the second printing mechanism 5 work alternately in this process; and the cloth is printed by using the four-color printing technology. The entire printing process only needs to use the first printing mechanism 4 and the second printing mechanism 5, thereby shortening the length of the production line and reducing the production floor area required by the printing device.

[0069] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A constant temperature ink printing device based on four-color printing, characterized by: The application relates to a printing machine, which comprises a rack (1), a feeding mechanism (2) and a receiving mechanism (3) arranged on the rack (1) and used for placing a cloth roll to be printed, a first printing mechanism (4) and a second printing mechanism (5) arranged in sequence between the feeding mechanism (2) and the receiving mechanism (3), and an end of the cloth roll is fixed to the receiving mechanism (3) after sequentially passing through the feeding mechanism (2), the first printing mechanism (4) and the second printing mechanism (5). A cleaning mechanism (7) is arranged on the rack (1) at the first printing mechanism (4) and the second printing mechanism (5), the first printing mechanism (4) comprises a printing roller (41) on which the cloth roll is wound, the cleaning mechanism (7) comprises a supporting assembly (71) and a cleaning assembly (72), the supporting assembly (71) moves up and down along the height direction of the rack (1), when the supporting assembly (71) runs to the maximum height, the supporting assembly (71) is higher than the printing roller (41), the cleaning assembly (72) abuts against the printing roller (41) and scrapes the surface of the printing roller (41), and the cleaning mechanism (7) is used for cleaning the ink on the first printing mechanism (4) and the second printing mechanism (5). The feeding mechanism (2) comprises a feeding roller (21) rotatably arranged on the rack (1), the feeding roller (21) is provided with a connecting assembly (22) used for fixing the cloth, the connecting assembly (22) comprises a connecting section (221), one side of the connecting section (221) is fixed on the feeding roller (21), and the other side is provided with a clamping piece (222), the clamping piece (222) fixes the cloth on the connecting section (221). The clamping piece (222) comprises a fixed hoop (2221), a pair of locking rings (2225) and a pair of clamping pieces (2222), the fixed hoop (2221) is sleeved and fixed on the side of the connecting section (221) away from the feeding roller (21), the pair of clamping pieces (2222) are overlapped with each other and are hinged to the fixed hoop (2221), the clamping piece (2222) is provided with a biting tooth (2223) at each end, the biting teeth (2223) on the pair of clamping pieces (2222) are bitten with each other, the locking ring (2225) is sleeved at the end position of the pair of clamping pieces (2222), and a fixing bolt (2224) is arranged on the locking ring (2225), and the fixing bolt (2224) makes the pair of clamping pieces (2222) clamp the cloth.

2. A constant temperature ink printing device based on four-color printing according to claim 1, characterized in that: The printing roller (41) is rotatably arranged on the rack (1), the rack (1) is provided with a coating assembly (42), the coating assembly (42) abuts against the printing roller (41) and coats the surface of the printing roller (41) with ink.

3. A constant temperature ink printing device based on four-color printing according to claim 2, characterized in that: The coating assembly (42) comprises an ink box (421) arranged on the rack (1), a partition plate (422) is arranged in the ink box (421), the ink box (421) is divided into a first accommodating cavity (9) and a second accommodating cavity (10) by the partition plate (422), and ink is stored in the first accommodating cavity (9) and the second accommodating cavity (10); A liquid permeation groove (4211) is arranged in the cavity wall of the first accommodating cavity (9) and the second accommodating cavity (10) of the ink box (421), a coating piece (423) is arranged on the ink box (421) at the liquid permeation groove (4211), the coating piece (423) is adapted to block the liquid permeation groove (4211), one end of the coating piece (423) extends into the ink box (421), and the other end is in contact with the printing roller (41).

4. A constant temperature ink printing device based on four-color printing according to claim 3, characterized in that: The ink box (421) is installed on the rack (1) through a deflection assembly (6), the deflection assembly (6) comprises a control motor (61) arranged on the rack (1), one end of the ink box (421) is fixed to the output shaft of the control motor (61), and the other end is rotatably installed on the rack (1).

5. A constant temperature ink printing device based on four-color printing according to claim 1, characterized in that: The supporting assembly (71) comprises a supporting shaft (711), and the two ends of the supporting shaft (711) are respectively provided with a supporting cylinder (712) fixed to the rack (1) and used for driving the supporting shaft (711) to move up and down.

6. A constant temperature ink printing device based on four-color printing according to claim 1, characterized in that: The cleaning assembly (72) comprises a scraping plate (721) abutting against the side wall of the printing roller (41), a sliding rail (722) is fixed to the rack (1) and arranged in parallel with the printing roller (41), a connecting rod (723) is arranged on the scraping plate (721), one end of the connecting rod (723) away from the scraping plate (721) is provided with a sliding block (724) slidably arranged in the sliding rail (722); One end of the sliding rail (722) is provided with a driving motor (725), a driving screw rod (726) is arranged in the sliding rail (722) in the length direction of the sliding rail (722), the output shaft of the driving motor (725) penetrates the side wall of the sliding rail (722) and is coaxially connected with the driving screw rod (726), and the driving screw rod (726) penetrates the sliding block (724) and is threadedly connected with the sliding block (724).

7. A constant temperature ink printing device based on four-color printing according to claim 1, characterized in that: The rack (1) is provided with a feeding motor (23), the output shaft of the feeding motor (23) is coaxially fixed with the feeding roller (21) and drives the feeding roller (21) to rotate, so that the cloth is wound on the feeding roller (21).

8. A constant temperature ink printing device based on four-color printing according to claim 1, characterized in that: The rack (1) is provided with a drying assembly (8) at the printing roller (41), the drying assembly (8) comprises a plurality of drying rollers (81), a plurality of the drying rollers (81) are arranged at intervals with the printing roller (41), the drying roller (81) has a heating cavity (811) inside, the heating cavity (811) is provided with an electric heating wire (82), the electric heating wire (82) is arranged in a spiral shape along the inner wall of the heating cavity (811).

Images