Printing device and method for high-count high-density pure cotton fabric

Abstract

The application relates to the field of fabric printing processing, in particular to a high-count high-density pure cotton fabric printing device and method. The high-count high-density pure cotton fabric printing device comprises a printing device, a transmission frame arranged on one side of the printing device, a drying unit and a color fixing unit installed on the transmission frame, and further comprises a pipeline structure located between the drying unit and the color fixing unit. The printing device comprises a main body, two printing rollers distributed above and below in the main body, and an adjusting piece. The drying unit comprises a plurality of nozzles obliquely pointing to the upper side of the transmission frame. The color fixing unit comprises two heating rollers, and the two heating rollers are externally covered with closed shells. The high-count high-density pure cotton fabric printing device and method can dry and fix the color of the fabric at the first time after printing, improve the quality of fabric printing processing, improve the utilization of energy, have the energy-saving effect, and are more beneficial to the printing processing of the fabric.

Description

Technical Field

[0001] This invention relates to the field of fabric printing and processing, and more particularly to a printing apparatus and method for high-count, high-density pure cotton fabrics. Background Technology

[0002] High-count, high-density fabrics refer to textiles with a high yarn count and high fabric density. Specifically, high count means finer yarns, typically cotton yarns with a count of 60 or higher, even reaching 120 or more. Fabrics made from such yarns have a delicate texture and a soft feel. High density means that there are many warp and weft yarns per unit area, arranged closely together, making the fabric denser, thicker, and with good abrasion resistance and drape.

[0003] To further enhance the aesthetics and functionality of fabrics, roller printing machines are typically used during fabric processing. However, traditional roller printing machines cannot directly dry and fix the printed dyes after printing, causing the dyes to easily penetrate and spread, resulting in unpredictable changes to the printed pattern and compromising its aesthetics.

[0004] Therefore, it is necessary to provide a new printing device and method for high-count, high-density pure cotton fabrics to solve the above-mentioned technical problems. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a printing apparatus and method for high-count, high-density pure cotton fabrics.

[0006] The printing apparatus for high-count, high-density pure cotton fabric provided by the present invention includes a printing device, a transfer frame disposed on one side of the printing device, a drying unit and a color-fixing unit mounted on the transfer frame, and further includes:

[0007] A piping structure located between the drying unit and the color-fixing unit, used to introduce the temperature generated by the color-fixing unit into the drying unit;

[0008] The printing device includes a main body, in which two printing rollers are arranged vertically, and an adjusting component that can be raised and lowered to adjust the distance between one of the printing rollers and the other printing roller.

[0009] The drying unit includes multiple nozzles pointing obliquely upwards from the conveyor frame, which spray out a hot airflow.

[0010] The color-fixing unit includes two heating rollers that are distributed vertically and spaced apart in the middle for threading the fabric. The two heating rollers are covered with a closed shell to lock in the heat energy.

[0011] The pipeline structure includes an installation pipe, the outer circumference of which has an air inlet pipe and an air outlet pipe. The air inlet pipe is connected to the interior of the sealed shell, and the air outlet pipe is connected to a nozzle.

[0012] The installation tube is also equipped with a self-cleaning filter for intercepting fabric fibers.

[0013] Preferably, a first positioning frame is fixed on the inner side of the main body, and one of the printing rollers rotates on the first positioning frame;

[0014] The adjusting component includes a hydraulic cylinder fixed to the first positioning frame. The output end of the hydraulic cylinder is fixed with a liftable mounting base, and another printing roller rotates on the mounting base. The spacing between the two printing rollers is adjusted reasonably for fabrics of different thicknesses.

[0015] Preferably, the drying unit further includes a first stand fixed to the side of the conveyor frame, with a first mounting bracket vertically fixed to the upper end of the first stand. A mounting plate spanning above the conveyor frame is fixed on the first mounting bracket. Two air pumps are symmetrically fixed at the upper end of the mounting plate away from the center. The air pumps are connected to the air outlet pipe to extract the heat energy locked inside the sealed shell, while the air outlet is connected to a conduit mounted on the mounting plate. The air inlet of the nozzle is connected to the conduit through a T-junction.

[0016] Preferably, the color-fixing unit further includes a second stand fixed to the side of the transmission frame, a second mounting bracket vertically fixed to the upper end of the second stand, the heating roller rotating on the second stand, and the enclosed shell fixed on the second stand.

[0017] Preferably, the side of the closed shell has a through-hole for threading fabric at a position between the two heating rollers. The through-hole also serves as an air inlet for the closed shell to balance the air pressure inside the closed shell.

[0018] Preferably, the inner wall of the enclosed shell is further provided with a thermal insulation material, which is rock wool.

[0019] Preferably, neither end of the mounting tube is sealed, and an annular retaining ring is provided on the inner circumference of the mounting tube, with a silicone pad on the side of the retaining ring.

[0020] Preferably, the self-cleaning filter element includes a first cap and a second cap that seals the openings at both ends of the mounting tube;

[0021] The inner cover plate of the first cover is fixed with a second positioning frame inserted into the installation tube. The other end of the second positioning frame is fixed with a ring plate. On the other side of the ring plate, a hemispherical filter screen for intercepting fabric fibers is fixed. A first drive shaft connected by a bearing passes through the filter screen. An impeller is provided on the first drive shaft and located downstream of the filter screen. The impeller converts the kinetic energy of the gas flow into the kinetic energy to drive the first drive shaft to rotate.

[0022] The inner cover plate of the second cover is fixed with a third positioning frame inserted into the installation tube. The third positioning frame is connected to a second drive shaft by a bearing. One end of the second drive shaft is fixed with a connecting seat and is detachably connected to the first drive shaft through the connecting seat to form a complete rotating shaft. The outer circumference of the connecting seat is also fixed with several ring-shaped brush plates. The brush plates can directly contact the filter screen and scrape off the fabric fibers attached to the filter screen during rotation.

[0023] Preferably, a hexagonal plug is fixed to one end of the first drive shaft, and a hexagonal slot adapted to the hexagonal plug is provided on one side of the connecting seat, so that the first drive shaft and the second drive shaft are fixed by plugging in.

[0024] When the first cap is fixed to the mounting tube, the ring plate used to install the filter screen abuts against the silicone pad on the side of the retaining ring.

[0025] The printing method of a high-count, high-density pure cotton fabric printing device includes:

[0026] S1. The fabric is printed by the printing roller. After printing, the fabric is conveyed by the conveyor frame. At the same time, the fabric passes through the drying unit, the through-hole on the side of the closed shell and the gap between the two heating rollers.

[0027] S2. Preferably, the heating roller in the color-fixing unit is turned on. After the heating roller has finished heating, the radiated heat will be concentrated inside the closed shell. Then, the air pump is turned on to extract the heat inside the closed shell, so that the fabric can be transported.

[0028] S3. The nozzle sprays out a hot airflow, which acts on the fabric to achieve preliminary drying of the fabric and prevents the dye from penetrating and spreading.

[0029] S4. The heating roller directly fixes the fabric at high temperature, improving the bond between the fabric and the dye. At the same time, the heat radiated by the heating roller is continuously supplied to the drying unit.

[0030] Compared with related technologies, the printing apparatus and method for high-count, high-density pure cotton fabrics provided by the present invention have the following beneficial effects:

[0031] It can dry and fix the fabric immediately after printing, improving the quality of fabric printing; at the same time, it can improve energy utilization, which has an energy-saving effect and is more conducive to fabric printing. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a preferred embodiment of the printing apparatus and method for high-count, high-density pure cotton fabric provided by the present invention.

[0033] Figure 2 This is a schematic diagram of the printing apparatus shown in the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of the adjusting member shown in the present invention;

[0035] Figure 4 As shown in this invention Figure 1 A partial structural diagram;

[0036] Figure 5 As shown in this invention Figure 4 A partial structural diagram;

[0037] Figure 6 This is a schematic diagram of the drying unit shown in the present invention;

[0038] Figure 7 This is a schematic diagram of the structure of the color-fixing unit shown in this invention;

[0039] Figure 8 This is a schematic diagram of the pipeline structure and self-cleaning filter element shown in the present invention;

[0040] Figure 9 As shown in this invention Figure 8 Enlarged structural diagram at point A.

[0041] Labels in the diagram: 1. Printing device; 11. Main body; 12. First positioning frame; 13. Printing roller; 14. Adjusting component; 141. Hydraulic cylinder; 142. Mounting base; 2. Transfer frame; 3. Drying unit; 31. First leg; 32. First mounting frame; 33. Mounting plate; 34. Air pump; 35. Conduit; 36. Nozzle; 4. Color fixing unit; 41. Second leg; 42. Second mounting frame; 43. Heating roller; 44. 5. Enclosed shell; 6. Piping structure; 7. Mounting pipe; 8. Inlet pipe; 9. Outlet pipe; 10. Retaining ring; 11. Self-cleaning filter element; 12. First cover; 13. Second positioning frame; 24. Filter screen; 35. First drive shaft; 46. Impeller; 57. Hexagonal insert; 68. Second cover; 79. Third positioning frame; 80. Second drive shaft; 910. Connecting seat; 10. Brush plate; 112. Hexagonal slot. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0043] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0044] Please see Figures 1 to 9 The high-count, high-density pure cotton fabric printing device provided in this embodiment of the invention includes a printing device 1 and a transfer frame 2 located on one side of the printing device 1.

[0045] The printing device 1 has two printing rollers 13 distributed vertically, and also has an adjusting member 14 for adjusting the distance between the two printing rollers 13;

[0046] Drying unit 3 and color-fixing unit 4 are installed on the transfer rack 2. Drying unit 3 and color-fixing unit 4 are connected by a pipeline structure 5. A self-cleaning filter element 6 is also installed in the pipeline structure 5.

[0047] It should be noted that the device is mainly a roller printing machine. The printing device 1 has a printing roller 13 for printing on the fabric. The printed fabric is then transported by the transfer frame 2.

[0048] The adjusting component 14 is provided for the printing roller 13. It is used to install and adjust the printing roller 13 located above to change the distance between the printing roller 13 and another printing roller 13. The specific adjustment depends on the thickness of the fabric itself, thereby improving the contact effect between the printing roller 13 and the fabric and improving the printing quality.

[0049] Both the drying unit 3 and the color-fixing unit 4 are used for drying the dye. First, the dye is dried by the drying unit 3 to avoid the dye from soaking and spreading, which can improve the printing quality. The color-fixing unit 4 further heats the dye to improve the dye's fastness on the fabric and prevent the dye from fading or migrating under conditions such as washing, friction, and light exposure, which further improves the processing quality of the fabric.

[0050] The temperature required for color fixing is relatively high, between 100℃ and 180℃, while the temperature required for drying is relatively low, between 80℃ and 150℃. The heat generated by the color fixing unit 4 is radiated outwards, resulting in heat waste. To address this, the color fixing unit 4 can lock in the radiated heat, and the drying unit 3 extracts the locked heat through the piping structure 5 for drying the dye, thus making the device more energy-efficient.

[0051] During the process of extracting heat from the color-fixing unit 4, fibers from the fabric can also be easily extracted. To avoid clogging, a self-cleaning filter 6 is installed in the pipeline structure 5. The self-cleaning filter 6 can intercept and concentrate the fabric fibers, ensuring the normal operation of the pipeline structure 5 and facilitating subsequent cleaning.

[0052] In an embodiment of the present invention, please refer to Figure 2 and Figure 3 The printing device 1 includes a main body 11, and a first positioning frame 12 is fixed on the inner side of the main body 11, wherein a printing roller 13 rotates on the first positioning frame 12;

[0053] The adjusting component 14 includes a hydraulic cylinder 141 fixed on the first positioning frame 12. The output end of the hydraulic cylinder 141 is fixed with a liftable mounting base 142, and another printing roller 13 rotates on the mounting base 142.

[0054] It should be noted that in the adjusting component 14, the hydraulic cylinder 141 drives the mounting base 142 to move up and down, which in turn drives the printing roller 13 to move, so as to reasonably adjust the distance between the two printing rollers 13, thereby adapting to fabrics of different thicknesses and improving the printing accuracy.

[0055] The adjusting component 14 is not limited to the hydraulic cylinder 141; a single-threaded screw can also be used. The mounting base 142 can also be raised and lowered using a single-threaded screw. The specific choice depends on the actual situation.

[0056] In an embodiment of the present invention, please refer to Figure 6 The drying unit 3 includes a first leg 31 fixed to the side of the conveyor frame 2. A first mounting frame 32 is vertically fixed to the upper end of the first leg 31. A mounting plate 33 spanning above the conveyor frame 2 is fixed on the first mounting frame 32. Two air pumps 34 are symmetrically fixed at the upper end of the mounting plate 33 away from the center. The air outlet of the air pump 34 is connected to the conduit 35 installed on the mounting plate 33. The air inlet of the nozzle 36 is connected to the conduit 35 through a three-way connector.

[0057] It should be noted that in the drying unit 3, the air pump 34 can extract gas and introduce it into the nozzle 36 through the conduit 35, and then spray it out through the nozzle 36 to dry the fabric.

[0058] The output port of the nozzle 36 preferably has a variable structure, meaning the opening size can be adjusted to suit the type of fabric printing and improve the drying effect.

[0059] In an embodiment of the present invention, please refer to Figure 7The color-fixing unit 4 includes a second stand 41 fixed to the side of the transmission frame 2, a second mounting frame 42 vertically fixed to the upper end of the second stand 41, a heating roller 43 rotating on the second stand 41, and a closed shell 44 fixed on the second stand 41.

[0060] The sealed shell 44 has a through-hole for threading fabric at a position between the two heating rollers 43 on its side. This through-hole also serves as an air inlet for the sealed shell 44 to balance the internal air pressure. The inner wall of the sealed shell 44 is also provided with insulation material, which is rock wool.

[0061] It should be noted that the heating roller 43 is the main heat source structure. There is a gap between the two heating rollers 43 through which the fabric is threaded, which can heat and fix the fabric during the fabric conveying process. A closed shell 44 is set outside the heating roller 43. The closed shell 44 can lock in the heat emitted by the heating roller 43. At the same time, the rock wool can provide insulation and prevent heat loss, thereby enabling better heat recovery and reuse.

[0062] In an embodiment of the present invention, please refer to Figure 8 The pipeline structure 5 includes an installation pipe 51, both ends of which are not sealed. An annular retaining ring 54 is provided on the inner circumference of the installation pipe 51. The retaining ring 54 has a silicone pad on its side. The outer circumference of the installation pipe 51 has an air inlet pipe 52 and an air outlet pipe 53. The air inlet pipe 52 is connected to the inside of the sealed shell 44, and the air outlet pipe 53 is connected to the air inlet end of the air pump 34.

[0063] It should be noted that the pipeline structure 5 is used to connect the closed shell 44 and the air pump 34. Therefore, the air pump 34 can extract the heat locked inside the closed shell 44 and provide the drying unit 3 with the initial drying treatment of the fabric.

[0064] In an embodiment of the present invention, please refer to Figure 8 and Figure 9 The self-cleaning filter element 6 includes a first cap 61 and a second cap 67 with openings at both ends of the sealed mounting tube 51.

[0065] The inner cover plate of the first cover 61 is fixed with a second positioning frame 62 inserted into the installation tube 51. The other end of the second positioning frame 62 is fixed with a ring plate. On the other side of the ring plate, a hemispherical filter screen 63 for intercepting fabric fibers is fixed. A first drive shaft 64 connected by a bearing passes through the filter screen 63. An impeller 65 is provided on the first drive shaft 64 and located downstream of the filter screen 63. A hexagonal insert block 66 is fixed at one end of the first drive shaft 64. When the first cover 61 is fixed to the installation tube 51, the ring plate for installing the filter screen 63 abuts against the silicone pad on the side of the retaining ring 54.

[0066] The inner cover plate of the second cover 67 is fixed with a third positioning frame 68 that is inserted into the installation tube 51. The bearing on the third positioning frame 68 is connected to a second drive shaft 69. One end of the second drive shaft 69 is fixed with a connecting seat 610. One side of the connecting seat 610 has a hexagonal slot 612 that is adapted to the hexagonal plug 66. The first drive shaft 64 and the second drive shaft 69 are fixed by insertion to form a complete rotating shaft. Several ring-shaped brush plates 611 are also fixed on the outer circumference of the connecting seat 610. The brush plates 611 can directly contact the filter screen 63 and scrape off the fabric fibers attached to the filter screen 63 during rotation.

[0067] It should be noted that in the self-cleaning filter element 6, the filter screen 63 is used to intercept fabric fibers, thereby preventing clogging at the nozzle 36 position; the first drive shaft 64 and the second drive shaft 69 can be fixed to form a complete rotating shaft. An impeller 65 is set on the first drive shaft 64. The impeller 65 is driven to rotate by the airflow, which in turn drives the rotating shaft to rotate, thereby causing the brush plate 611 to rotate. The brush plate 611 scrapes off the fabric fibers on the filter screen 63, preventing the filter screen 63 from becoming clogged.

[0068] Both the first cover 61 and the second cover 67 can be removed from the mounting tube 51. The first drive shaft 64 bearing is installed on the filter screen 63, and the second drive shaft 69 bearing is installed on the third positioning frame 68, thereby enabling the entire self-cleaning filter element 6 to be disassembled for cleaning the fabric fibers that have been cleaned.

[0069] The printing method of a high-count, high-density pure cotton fabric printing device includes:

[0070] S1. The fabric is printed by the printing roller 13. After printing, the fabric is conveyed by the conveyor frame 2. At the same time, the fabric passes through the drying unit 3, the side opening of the closed shell 44 and the gap between the two heating rollers 43.

[0071] S2. Preferably, the heating roller 43 in the color-fixing unit 4 is turned on. After the heating roller 43 has finished heating, the radiated heat will be concentrated inside the closed shell 44. Then, the air pump 34 is turned on to extract the heat inside the closed shell 44, so that the fabric can be transported.

[0072] S3, Nozzle 36 sprays out a hot airflow, which acts on the fabric to achieve preliminary drying of the fabric and prevent the dye from penetrating and spreading.

[0073] S4, the heating roller 43 directly fixes the fabric at high temperature, improving the bond between the fabric and the dye, while the heat radiated by the heating roller 43 is continuously supplied to the drying unit 3.

[0074] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A printing apparatus for high-count, high-density pure cotton fabric, comprising a printing apparatus (1), a transfer frame (2) disposed on one side of the printing apparatus (1), a drying unit (3) and a color-fixing unit (4) mounted on the transfer frame (2), characterized in that, Also includes: A piping structure (5) located between the drying unit (3) and the color-fixing unit (4) for introducing the temperature generated by the color-fixing unit (4) into the drying unit (3); The printing device (1) includes a main body (11), in which two printing rollers (13) are arranged vertically, and an adjusting member (14) is also provided to adjust the distance between one of the printing rollers (13) and the other printing roller (13). The drying unit (3) includes a plurality of nozzles (36) pointing obliquely above the conveyor frame (2), which spray out airflow with temperature. The color-fixing unit (4) includes two heating rollers (43) that are distributed vertically and spaced apart in the middle for threading the fabric. The two heating rollers (43) are covered with a closed shell (44) to lock in the heat energy. The pipeline structure (5) includes an installation pipe (51), the outer circumferential wall of the installation pipe (51) has an air inlet pipe (52) and an air outlet pipe (53), the air inlet pipe (52) is connected to the interior of the sealed shell (44), and the air outlet pipe (53) is connected to the nozzle (36). The installation tube (51) is also equipped with a self-cleaning filter (6) for intercepting fabric fibers. The self-cleaning filter element (6) includes a first cap (61) and a second cap (67) with openings at both ends of a closed mounting tube (51). The inner cover plate of the first cover (61) is fixed with a second positioning frame (62) inserted into the installation tube (51). The other end of the second positioning frame (62) is fixed with a ring plate. On the other side of the ring plate, a hemispherical filter screen (63) for intercepting fabric fibers is fixed. A first drive shaft (64) connected by a bearing passes through the filter screen (63). An impeller (65) is provided on the first drive shaft (64) and located downstream of the filter screen (63). The impeller (65) converts the kinetic energy of the gas flow into the kinetic energy that drives the first drive shaft (64) to rotate. The inner cover plate of the second cover (67) is fixed with a third positioning frame (68) inserted into the installation tube (51). The bearing on the third positioning frame (68) is connected to a second drive shaft (69). One end of the second drive shaft (69) is fixed with a connecting seat (610), and it is detachably connected to the first drive shaft (64) through the connecting seat (610) to form a complete rotating shaft. The outer circumference of the connecting seat (610) is also fixed with several ring-shaped brush plates (611). The brush plates (611) are in direct contact with the filter screen (63) and scrape off the fabric fibers attached to the filter screen (63) during the rotation.

2. The printing apparatus for high-count, high-density pure cotton fabric according to claim 1, characterized in that, The inner side of the main body (11) is fixed with a first positioning frame (12), and one of the printing rollers (13) rotates on the first positioning frame (12); The adjusting component (14) includes a hydraulic cylinder (141) fixed on the first positioning frame (12). The output end of the hydraulic cylinder (141) is fixed with a liftable mounting base (142), and another printing roller (13) rotates on the mounting base (142). The distance between the two printing rollers (13) is reasonably adjusted for fabrics of different thicknesses.

3. The printing apparatus for high-count, high-density pure cotton fabric according to claim 1, characterized in that, The drying unit (3) also includes a first stand (31) fixed to the side of the transmission frame (2). The upper end of the first stand (31) is vertically fixed to a first mounting frame (32). The first mounting frame (32) is fixed to a mounting plate (33) spanning above the transmission frame (2). Two air pumps (34) are symmetrically fixed at the upper end of the mounting plate (33) away from the center. The air inlet of the air pump (34) is connected to the air outlet pipe (53). The air pump (34) is used to extract the heat energy locked inside the sealed shell (44). The air outlet is connected to the conduit (35) installed on the mounting plate (33). The air inlet of the nozzle (36) is connected to the conduit (35) through a tee.

4. The printing device for high-count, high-density pure cotton fabric according to claim 1, characterized in that, The color-fixing unit (4) also includes a second stand (41) fixed to the side of the transmission frame (2), a second mounting frame (42) vertically fixed to the upper end of the second stand (41), the heating roller (43) rotating on the second stand (41), and the closed shell (44) fixed on the second stand (41).

5. The printing apparatus for high-count, high-density pure cotton fabric according to claim 4, characterized in that, The side of the closed shell (44) is provided with a through-hole for threading fabric at a position between the two heating rollers (43). The through-hole also serves as an air inlet for the closed shell (44) to balance the air pressure inside the closed shell (44).

6. The printing apparatus for high-count, high-density pure cotton fabric according to claim 5, characterized in that, The inner wall of the enclosed shell (44) is also provided with thermal insulation material, which is rock wool.

7. The printing apparatus for high-count, high-density pure cotton fabric according to claim 1, characterized in that, Both ends of the mounting tube (51) are not closed, and an annular retaining ring (54) is provided on the inner circumference of the mounting tube (51). The retaining ring (54) has a silicone pad on its side.

8. The printing apparatus for high-count, high-density pure cotton fabric according to claim 7, characterized in that, One end of the first drive shaft (64) is fixed with a hexagonal plug (66), and the connecting seat (610) has a hexagonal slot (612) on one side that is adapted to the hexagonal plug (66). The first drive shaft (64) and the second drive shaft (69) are fixed by plugging in. When the first cap (61) is fixed on the mounting tube (51), the ring plate used to install the filter screen (63) abuts against the silicone pad on the side of the retaining ring (54).

9. The printing method of the printing apparatus for high-count, high-density pure cotton fabric according to claim 3, characterized in that, include: S1. The fabric is printed by the printing roller (13). After printing, the fabric is transported by the conveyor frame (2). At the same time, the fabric passes through the drying unit (3), the side opening of the closed shell (44), and the gap between the two heating rollers (43). S2. Turn on the heating roller (43) in the color fixing unit (4). After the heating roller (43) finishes heating, the radiated heat will be concentrated inside the closed shell (44). Then turn on the air pump (34) to extract the heat inside the closed shell (44) so ​​that the fabric can be transported. S3, Nozzle (36) sprays out a hot airflow, which acts on the fabric to achieve preliminary drying of the fabric and prevents the dye from penetrating and spreading. S4. The heating roller (43) directly fixes the fabric at high temperature, which improves the bond between the fabric and the dye. At the same time, the heat radiated by the heating roller (43) is continuously supplied to the drying unit (3).

Images