High color fastness printing forming process and device for fiber knitted fabric

Abstract

The application discloses a high-color-fastness fiber knitted fabric printing forming device, which comprises a first shell, a second shell and a third shell, a hot air drying plate is arranged in the first shell, one end of the hot air drying plate extends into the second shell, the inside of the second shell is divided into a first cavity and a second cavity by the hot air drying plate, a wind cooling mechanism is arranged in the first cavity, a second conveying roller for pressing the fabric and the transfer paper is connected to the inner wall of the third shell through a bearing, and an upper pressing plate and a lower pressing plate for heating and pressing are arranged. The upper pressing plate and the lower pressing plate are arranged, the upper pressing plate and the lower pressing plate can press the fabric and the transfer paper after moving towards each other, the heat transfer is completed through heating and pressing, compared with roller pressing, the upper pressing plate and the lower pressing plate not only have a large contact surface with the fabric and the transfer paper, but also can control the pressing time and the pressing pressure, so that the heat transfer effect is ensured, and the printing forming quality is favorable.

Description

Technical Field

[0001] This invention relates to the field of printing and forming equipment technology, and more specifically, to a high color fastness chemical fiber knitted fabric printing and forming process and apparatus. Background Technology

[0002] Heat transfer printing, a commonly used printing process, involves heating transfer paper to sublimate the dyes onto the fabric, allowing the fabric to absorb the dyes. Fabrics printed in this way have good printing effects and high color fastness.

[0003] Therefore, to improve color fastness, current printing processes mostly employ heat transfer printing. For example, existing technology (CN115233477B) discloses a high color fastness heat transfer printing process. By using a fabric temperature control machine to pre-treat the fabric before the heat transfer printing process, the fabric can fully absorb the sublimated dye after heat transfer printing.

[0004] The above method requires the hot air inside the machine to be vented when cooling the heated fabric so that the fabric can exchange heat with the cold air. This method not only wastes hot air, but also increases energy consumption if multiple operations are required because the hot air is vented and the heating element needs to reheat the air inside the machine. This is not conducive to energy conservation and emission reduction.

[0005] Meanwhile, during thermal sublimation transfer, the fabric and the heat transfer printing need to be in a heated and pressurized environment. Currently, heating rollers and pressure rollers are used, but the contact area between the pressure roller and the heating roller is small, which is not conducive to ink transfer.

[0006] To address this, existing technology (CN112477393A) discloses a high-performance adjustable heat transfer sublimation device that replaces the original pressure roller with a pressure assembly. The pressure assembly uses multiple rolling rollers to press the fabric and transfer paper on the heating roller, thereby increasing the contact area on the heating roller. This allows the transfer paper to be fully heated and the ink to be completely transferred to the fabric, improving the heat transfer quality.

[0007] The aforementioned existing technologies achieve this by increasing the number of rolling rollers, but in essence, they still rely on heating rollers and pressure rollers to apply pressure, which does not fundamentally solve the problem. Roller pressing not only results in low pressure but also short pressing time, which is not conducive to ink transfer.

[0008] Given the shortcomings of the existing technology, it is necessary to further improve it in order to meet the actual use case. Summary of the Invention

[0009] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0010] Therefore, the purpose of this invention is to provide a high color fastness chemical fiber knitted fabric printing process and apparatus.

[0011] This invention provides a high colorfastness chemical fiber knitted fabric printing and forming device, comprising a first housing, a second housing, and a third housing, a first conveying roller, a second idler roller, and a fourth idler roller for conveying fabric, and a first idler roller and a third idler roller for conveying transfer paper. The walls of the first housing, the second housing, and the third housing are all provided with through grooves for the fabric and transfer paper to pass through.

[0012] The first housing is provided with a hot air drying plate. One end of the hot air drying plate extends into the second housing. The hot air drying plate is welded together from an air guide box and a cover plate. A first electric heating wire is bolted to the inner wall of the air guide box. An opening groove is provided on the cover plate located in the second housing. A first air outlet is provided on the cover plate located in the first housing. A second air outlet is provided on the air guide box located in the first housing.

[0013] The interior of the second housing is divided into a first cavity and a second cavity by a hot air drying plate. A cooling mechanism is provided in the first cavity. The cooling mechanism includes a cooling base and a driving mechanism for driving the cooling base to rotate. Air outlet holes are evenly opened on the bottom surface of the cooling base.

[0014] The inner wall of the third housing is connected to a bearing for pressing the fabric and transfer paper together, and is equipped with an upper pressure plate and a lower pressure plate for heating and pressurizing. A second electric heating wire is welded to the inner wall of the top surface of the lower pressure plate, and a control mechanism is provided on the upper pressure plate for controlling the power supply of the second conveying roller and the second electric heating wire.

[0015] As a preferred technical solution:

[0016] As described above, in a high colorfastness chemical fiber knitted fabric printing and forming device, the air guide box and cover plate are combined into a hollow square structure, and the side wall of the air guide box is welded to the inner wall of the second housing.

[0017] Through the above technical solution, the structural design of the air guide box and cover plate allows the airflow to enter the air guide box and cover plate through the opening slot, and finally be diverted out through the first air outlet and the second air outlet. In this way, the opening slot, together with the first air outlet and the second air outlet, can form an air flow channel, which can recycle and reuse the airflow used for cooling, and heat it for heating the fabric and transfer paper. In this way, cooling only requires one fan, which simplifies the equipment and is conducive to its widespread use.

[0018] As described above, in a high colorfastness chemical fiber knitted fabric printing and forming device, the first conveying roller and the first idler roller are located on both sides of the hot air drying plate, and both the first conveying roller and the first idler roller are connected to the bearing on the inner wall of the first housing. The second idler roller is located in the first cavity, the third idler roller is located in the second cavity, and both the second idler roller and the third idler roller are connected to the bearing on the inner wall of the second housing. The fourth idler roller is connected to the bearing on the inner wall of the third housing.

[0019] Through the above technical solution, the first conveying roller, the second idler roller, and the fourth idler roller form a conveying platform for conveying the fabric. The first idler roller and the third idler roller also form a conveying platform for conveying the transfer paper. In this way, the conveying of the fabric and the conveying of the transfer paper do not interfere with each other, and it also ensures that the fabric will not affect the transfer paper when it is cooled later. The structure is reasonable.

[0020] As described above, a high colorfastness chemical fiber knitted fabric printing and forming device includes a drive mechanism comprising a fixed box with a hollow cylindrical structure. The outer wall of the fixed box is connected to an air inlet pipe and an air outlet pipe. Blades are provided inside the fixed box. The blades are fixed to a vertical rod with pins. The bottom end of the vertical rod passes through the fixed cylinder and is welded to the inner wall of the air-cooled base. The vertical rod is connected to the inner wall of the fixed cylinder with a bearing. The air outlet pipe is connected to the fixed cylinder through a connecting pipe.

[0021] Through the above technical solution, the air inlet pipe can be connected to an external air pump. The air pump introduces compressed air into the fixed box. When the compressed air enters the fixed box, it will come into contact with the blades. The power of the compressed air can be converted into mechanical energy to drive the blades to rotate. As a result, the vertical rod rotates with the blades 24 and drives the air-cooled base to rotate. The air-cooled base can increase the heat dissipation range by rotating, so that it can fully cool the fabric.

[0022] As described above, in a high color fastness chemical fiber knitted fabric printing and forming device, the cross-section of the air-cooled seat is an inverted trapezoid, the air-cooled seat is generally long and narrow, and a fixed cylinder connected to its bearing is passed through the top surface of the air-cooled seat. The top end of the fixed cylinder passes through the top wall of the second housing and is welded to the second housing.

[0023] Through the above technical solution, the overall design of the air-cooling base is flat, so that the airflow loss is small after the airflow enters the air-cooling base, and the airflow jet from the air-cooling base is fast, which improves air flow. This means that the heat on the fabric can be removed more quickly, which is beneficial to improving the cooling effect and rate of the fabric.

[0024] As described above, in a high colorfastness chemical fiber knitted fabric printing and forming device, the upper pressure plate and the lower pressure plate are parallel to each other, the opposite side of the upper pressure plate and the lower pressure plate is horizontal, and the corner of the opposite side of the upper pressure plate and the lower pressure plate is rounded.

[0025] Through the above technical solution, the structural design of the upper and lower pressure plates allows the fabric and transfer cloth to be pressed together smoothly, ensuring the subsequent heat transfer effect. At the same time, the rounded corner design prevents the edges of the upper and lower pressure plates from leaving indentations on the fabric during pressure application, thus improving the overall quality of the fabric.

[0026] As described above, a high colorfastness chemical fiber knitted fabric printing and forming device includes sliding seats bolted to both sides of the upper and lower pressure plates. A slide rail matching the sliding seats is bolted to the inner wall of the third housing. A first rack is welded to both sides of the upper pressure plate, and a second rack is welded to both sides of the lower pressure plate. The first and second racks are parallel to each other and both mesh with a transmission gear. The transmission gear is pinned to a fixed shaft, one end of which is connected to a bearing on the wall of the third housing. A fixed plate is welded to the inner wall of the third housing, and a hydraulic cylinder is bolted to the fixed plate. The output end of the hydraulic cylinder is welded to the top surface of the upper pressure plate.

[0027] With the above technical solution, the sliding seat slides along the slide rail, and under the action of the sliding seat and the slide rail, the upper pressure plate and the lower pressure plate can move vertically up and down with high precision. This allows the upper pressure plate and the lower pressure plate to press the fabric and the transfer cloth flat, which is beneficial to the subsequent pressure and heating effect.

[0028] As described above, a high colorfastness chemical fiber knitted fabric printing and forming device includes a control mechanism comprising a first protrusion and a second protrusion bolted to the side of the upper pressure plate, a first micro switch cooperating with the first protrusion, and a second micro switch cooperating with the second protrusion. Both the first protrusion and the second protrusion are right-angled trapezoidal structures.

[0029] Through the above technical solution, the shape design of the first protrusion and the second protrusion is such that both have an inclined surface and a top surface. The inclined surface of the first protrusion faces downward and the inclined surface of the second protrusion faces upward. When the first protrusion and the second protrusion move, the operation and stop of the second conveying roller and the second electric heating wire are realized by pressing the buttons of the first micro switch and the second micro switch.

[0030] As described above, in a high colorfastness chemical fiber knitted fabric printing and forming device, an installation cylinder is fixedly bonded to the side wall of the lower pressure plate, an insulating sheet is fixedly bonded to the inner wall of the third housing opposite to the installation cylinder, a first metal sheet is bonded to the installation cylinder, a long strip of second metal sheet is bonded to the insulating sheet, one end of the second electric heating wire passes through the installation cylinder and is soldered to the first metal sheet, and the first metal sheet and the second metal sheet are in contact with each other.

[0031] With the above technical solution, since the lower pressure plate moves up and down frequently, if the second electric heating wire inside it is connected to the power grid through a wire, the wire will bend frequently, which will easily lead to the breakage of the internal wire core. Therefore, the present invention uses a first metal sheet and a second metal sheet. When the first metal sheet moves with the lower pressure plate, it can slide on the surface of the second metal sheet. Thus, the first metal sheet and the second metal sheet cooperate with each other, so that the second electric heating wire can always be connected to the circuit when the lower pressure plate moves.

[0032] A high colorfastness synthetic fiber knitted fabric printing process includes the following steps.

[0033] 1. The chemical fiber knitted fabric to be printed is fed into the first shell for drying and dehydration;

[0034] 2. The patterned transfer paper is fed into the first housing for preheating;

[0035] Third, the dried and dehydrated chemical fiber knitted fabric is sent into the second shell for air cooling.

[0036] 4. The air-cooled chemical fiber knitted fabric and the preheated transfer paper are fed into the third housing, and the sublimation transfer printing operation is completed under the heating and pressure of the upper and lower pressure plates.

[0037] The beneficial effects of the high colorfastness chemical fiber knitted fabric printing process and apparatus of the present invention are as follows:

[0038] This invention comprises a first shell, a second shell, and a third shell. A hot air drying plate is disposed inside the first shell, and a wind-cooling mechanism is disposed inside the second shell. The wind-cooling mechanism cools the fabric by blowing out a high-speed airflow. After passing through the fabric, the blown airflow can enter the hot air drying plate, where it is heated before entering the first shell. This process heats both the fabric and the transfer paper. In this way, not only can the heat of the fabric be recovered and utilized without the need to exhaust heat for cooling, thus greatly reducing energy consumption and promoting energy conservation and emission reduction, but the heating and cooling of the fabric can also be carried out simultaneously, improving overall work efficiency.

[0039] The present invention also includes an upper pressure plate and a lower pressure plate. When the upper pressure plate and the lower pressure plate come close to each other, the fabric and the transfer paper can be pressed together. The heat sublimation transfer is completed by heating and pressurizing. Compared with roller pressing, the upper pressure plate and the lower pressure plate not only have a larger contact area with the fabric and the transfer paper, but also can control the pressing time and pressure to ensure the heat transfer effect and improve the printing quality. Attached Figure Description

[0040] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein

[0041] Figure 1 This is a front view structural diagram of the present invention;

[0042] Figure 2 This is a three-dimensional structural diagram of the air guide box and cover plate of the present invention;

[0043] Figure 3 This is a side longitudinal section view of the air-cooled base structure of the present invention;

[0044] Figure 4 This is a front longitudinal section view of the air-cooled base and fixing box of the present invention;

[0045] Figure 5 This is a side view of the third housing and upper pressure plate of the present invention;

[0046] Figure 6 This is a top view of the third housing and upper pressure plate of the present invention;

[0047] Figure 7 This is a three-dimensional structural diagram of the upper and lower pressure plates of the present invention;

[0048] Figure 8 This is a cross-sectional view of the lower pressure plate of the present invention.

[0049] In the diagram: 1. First housing; 2. Second housing; 3. Third housing; 4. First conveyor roller; 5. First idler roller; 6. Second idler roller; 7. Third idler roller; 8. Fourth idler roller; 9. Second conveyor roller; 10. First cavity; 11. Second cavity; 12. Air guide box; 13. Cover plate; 14. Opening slot; 15. First electric heating wire; 16. First air outlet; 17. Second air outlet; 18. Air-cooled base; 19. Fixing box; 20. Air inlet pipe; 21. Air outlet... 21. Ductwork; 22. Vertical rod; 23. Fixed cylinder; 24. Blade; 25. Upper pressure plate; 26. Lower pressure plate; 27. Fixed plate; 28. Hydraulic cylinder; 29. ​​Sliding seat; 30. Slide rail; 31. First rack; 32. Second rack; 33. Transmission gear; 34. First protrusion; 35. Second protrusion; 36. First micro switch; 37. Second micro switch; 38. Second electric heating wire; 39. Mounting cylinder; 40. First metal sheet; 41. Second metal sheet. Detailed Implementation

[0050] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0051] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0052] This invention provides a technical solution: a high color fastness chemical fiber knitted fabric printing and forming device.

[0053] like Figure 1 As shown, the device includes a first housing 1, a second housing 2, and a third housing 3; a first conveying roller 4, a second idler roller 6, and a fourth idler roller 8 for conveying fabric; and a first idler roller 5 and a third idler roller 7 for conveying transfer paper. The walls of all three housings (first housing 1, second housing 2, and third housing 3) have through slots for the fabric and transfer paper to pass through. The first conveying roller 4 and the first idler roller 5 are both connected to bearings on the inner wall of the first housing 1; the second idler roller 6 and the third idler roller 7 are both connected to bearings on the inner wall of the second housing 2; and the fourth idler roller 8 is connected to a bearing on the inner wall of the third housing 3.

[0054] During operation, the front of the first housing 1, the second housing 2, and the third housing 3 are all provided with sliding doors. After the sliding doors are opened, the fabric and transfer paper can be pulled into the first housing 1, the second housing 2, and the third housing 3 through the through slots. The fabric is then laid on the first conveying roller 4, the second idler roller 6, and the fourth idler roller 8, and the transfer paper is laid on the first idler roller 5 and the third idler roller 7. Thus, the fabric and transfer paper can move in the first housing 1, the second housing 2, and the third housing 3 to achieve continuous operation.

[0055] like Figure 1-2 As shown, a hot air drying plate is installed inside the first housing 1, with one end extending into the second housing 2. The hot air drying plate is welded together from an air guide box 12 and a cover plate 13. A first electric heating wire 15 is bolted to the inner wall of the air guide box 12. An opening slot 14 is provided on the cover plate 13 located inside the second housing 2, and a first air outlet 16 is provided on the cover plate 13 located inside the first housing 1. A second air outlet 17 is provided on the air guide box 12 located inside the first housing 1. The air guide box 12 and the cover plate 13 are combined to form a hollow square structure. The side wall of the air guide box 12 is welded to the inner wall of the second housing 2. A first conveying roller 4 and a first idler roller 5 are located on both sides of the hot air drying plate.

[0056] The airflow cooling the fabric inside the second housing 2 can enter the air guide box 12 and the cover plate 13 through the opening slot 14. When flowing inside the air guide box 12 and the cover plate 13, it will come into contact with the first electric heating wire 15. The first electric heating wire 15 can heat the airflow. The heated airflow can be sprayed upward and downward through the first air outlet 16 and the second air outlet 17. The upward airflow can dry and dehydrate the fabric, and the downward airflow can preheat the transfer paper.

[0057] like Figure 1 and Figure 3 As shown, the interior of the second housing 2 is divided into a first cavity 10 and a second cavity 11 by a hot air drying plate. A cooling mechanism is installed in the first cavity 10, including a cooling seat 18 and a drive mechanism for rotating the cooling seat 18. Air outlets are evenly distributed on the bottom surface of the cooling seat 18. A second roller 6 is located in the first cavity 10, and a third roller 7 is located in the second cavity 11. The cooling seat 18 has an inverted trapezoidal cross-section and is generally elongated. A fixed cylinder 23, connected to its bearing, penetrates the top surface of the cooling seat 18. The top end of the fixed cylinder 23 penetrates the top wall of the second housing 2 and is welded to it.

[0058] The air-cooled seat 18 can rotate along the axial direction of the fixed cylinder 23. The air-cooled seat 18 can expand its cooling range by rotating, thereby improving the cooling effect of the air-cooled seat 18 on the fabric. The first cavity 10 and the second cavity 11 are separated by the hot air drying plate, so that when the fabric is cooled in the first cavity 10, it will not interfere with the transfer paper in the second cavity 11.

[0059] like Figure 1 and Figure 4 As shown, the drive mechanism includes a hollow cylindrical fixed box 19. An air inlet pipe 20 and an air outlet pipe 21 are connected to the outer wall of the fixed box 19. Blades 24 are installed inside the fixed box 19 and are secured to a vertical rod 22 with pins. The bottom end of the vertical rod 22 passes through a fixed cylinder 23 and is welded to the inner wall of the air-cooled base 18. The vertical rod 22 is connected to the inner wall of the fixed cylinder 23 by a bearing. The air outlet pipe 21 is connected to the fixed cylinder 23 via a connecting pipe.

[0060] After the air inlet pipe 20 is connected to the air pump, the air pump compresses the air through the fixed box 19. After the compressed air drives the vertical rod 22 to rotate through the blades 24, it will be ejected through the air outlet pipe 21, enter the fixed cylinder 23 through the connecting pipe, and finally enter the air-cooled base 18 and be ejected from the air outlet to form multiple airflow jets. After the airflow jets come into contact with the fabric, they can carry away the heat on the fabric to complete the cooling operation of the fabric. The airflow that carries away the heat finally enters the hot air drying plate for reuse, realizing the recycling of heat.

[0061] like Figure 5 and 6As shown, the inner wall of the third housing 3 is connected to a bearing for pressing the fabric and transfer paper together, and is equipped with an upper pressure plate 25 and a lower pressure plate 26 for heating and pressurizing. The upper pressure plate 25 and the lower pressure plate 26 are parallel to each other, and the opposite sides of the upper pressure plate 25 and the lower pressure plate 26 are horizontal. The corners of the opposite sides of the upper pressure plate 25 and the lower pressure plate 26 are rounded. Sliding seats 29 are bolted to both sides of the upper pressure plate 25 and the lower pressure plate 26. A slide rail 30 matching the sliding seat 29 is bolted to the inner wall of the third housing 3. The upper pressure plate 25 is welded to both sides with a first rack 31, and the lower pressure plate 26 is welded to both sides with a second rack 32. The first rack 31 and the second rack 32 are parallel to each other. Both the first rack 31 and the second rack 32 mesh with the transmission gear 33. The transmission gear 33 is fixed to a fixed shaft with a pin. One end of the fixed shaft is connected to the bearing of the wall of the third housing 3. A fixed plate 27 is welded to the inner wall of the third housing 3. A hydraulic cylinder 28 is bolted to the fixed plate 27. The output end of the hydraulic cylinder 28 is welded to the top surface of the upper pressure plate 25.

[0062] The second conveying roller 9 can press the fabric and transfer paper together and convey them between the upper pressure plate 25 and the lower pressure plate 26. When the hydraulic cylinder 28 pushes the upper pressure plate 25 downward, the first rack 31 can move synchronously with the upper pressure plate 25. The first rack 31 drives the transmission gear 33 to rotate. When the transmission gear 33 rotates, it will push the second rack 32 upward. Then the lower pressure plate 26 moves upward with the second rack 32. In this way, the upper pressure plate 25 and the lower pressure plate 26 can move synchronously. After they come together, they can press the fabric and transfer paper together to perform the pressure operation. A second electric heating wire 38 is welded to the inner wall of the top surface of the lower pressure plate 26. Under the action of the second electric heating wire 38, the lower pressure plate 26 can perform the heating operation.

[0063] like Figure 6-8 As shown, the upper pressure plate 25 is equipped with a control mechanism for controlling the energization of the second conveying roller 9 and the second electric heating wire 38. The control mechanism includes a first protrusion 34 and a second protrusion 35 bolted to the side of the upper pressure plate 25, a first micro switch 36 cooperating with the first protrusion 34, and a second micro switch 37 cooperating with the second protrusion 35. The first protrusion 34 and the second protrusion 35 are both right-angled trapezoidal structures. A mounting cylinder 39 is fixedly bonded to the side wall of the lower pressure plate 26. An insulating sheet is fixedly bonded to the inner wall of the third housing 3 opposite to the mounting cylinder 39. A first metal sheet 40 is bonded to the mounting cylinder 39, and a long strip of second metal sheet 41 is bonded to the insulating sheet. One end of the second electric heating wire 38 passes through the mounting cylinder 39 and is soldered to the first metal sheet 40. The first metal sheet 40 and the second metal sheet 41 are in contact with each other.

[0064] The second conveyor roller 9 is driven by a motor, which is connected to the power grid through the first micro switch 36. The first micro switch 36 can control the start and stop of the motor. The second metal sheet 41 is soldered with wires, and the second metal sheet 41 is connected to the second micro switch 37 through the wires. In this way, the second metal sheet 41 is connected to the power grid through the second micro switch 37, and the second micro switch 37 can control the second metal sheet 41.

[0065] When the first protrusion 34 moves downward with the lower pressure plate 26, its top surface always presses the button of the first micro switch 36. The first micro switch 36 is connected to the circuit at this time. When the upper pressure plate 25 and the lower pressure plate 26 come together, the inclined surface of the first protrusion 34 is aligned with the button of the first micro switch 36, and the button of the first micro switch 36 is no longer pressed. Thus, the first micro switch 36 can disconnect the circuit. This design allows the second conveying roller 9 to stop operating after the upper pressure plate 25 and the lower pressure plate 26 are closed, avoiding the continued conveying of fabric and transfer paper between the upper pressure plate 25 and the lower pressure plate 26. When the upper pressure plate 25 and the lower pressure plate 26 are separated, the second conveying roller 9 starts operating and can continue to convey fabric and transfer paper between the upper pressure plate 25 and the lower pressure plate 26.

[0066] When the second protrusion 35 moves downward with the lower pressure plate 26, it is not in contact with the button of the second micro switch 37. When the upper pressure plate 25 and the lower pressure plate 26 come together, the button of the second micro switch 37 moves along the inclined surface of the second protrusion 35 to the top surface of the second protrusion 35. At this time, the button of the second micro switch 37 is pressed, and the second electric heating wire 38 starts to be powered on and performs heating. When the upper pressure plate 25 and the lower pressure plate 26 separate, the button of the second micro switch 37 is unpressed again, and the second electric heating wire 38 is de-energized. This method achieves the effect of energy saving.

[0067] When the upper pressure plate 25 and the lower pressure plate 26 are performing pressurization and heating operations, the second conveying roller 9 stops operating, but the first conveying roller 4 can continue to convey the fabric. At this time, the fabric will briefly accumulate between the two second rollers 6, which can increase the time that the fabric stays in the first cavity 10, thereby improving the cooling effect on the fabric.

[0068] To prevent the fabric from remaining piled up between the second idler rollers 6, the rotational speed of the second conveyor roller 9 must be greater than that of the first conveyor roller 4. This allows the second conveyor roller 9 to quickly transport the fabric between the second idler rollers 6 to the space between the upper pressure plate 25 and the lower pressure plate 26 after it starts moving.

[0069] A high colorfastness synthetic fiber knitted fabric printing process includes the following steps.

[0070] 1. The chemical fiber knitted fabric to be printed is fed into the first housing 1 for drying and dehydration;

[0071] 2. The patterned transfer paper is fed into the first housing 1 for preheating;

[0072] 3. The dried and dehydrated chemical fiber knitted fabric is sent into the second shell 2 for air cooling;

[0073] Fourth, the air-cooled chemical fiber knitted fabric and the preheated transfer paper are fed into the third housing 3, and the heat sublimation transfer printing operation is completed under the heating and pressure of the upper pressure plate 25 and the lower pressure plate 26.

[0074] In the description of this specification, terms such as "connection," "installation," and "fixation" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms within this invention based on the specific circumstances.

[0075] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high colorfastness chemical fiber knitted fabric printing and forming device, comprising a first housing, a second housing, and a third housing, a first conveying roller, a second idler roller, and a fourth idler roller for conveying fabric, and a first idler roller and a third idler roller for conveying transfer paper, wherein the walls of the first housing, the second housing, and the third housing are all provided with through grooves for the fabric and transfer paper to pass through. Its features are: The first housing is provided with a hot air drying plate. One end of the hot air drying plate extends into the second housing. The hot air drying plate is welded together from an air guide box and a cover plate. A first electric heating wire is bolted to the inner wall of the air guide box. An opening groove is provided on the cover plate located in the second housing. A first air outlet is provided on the cover plate located in the first housing. A second air outlet is provided on the air guide box located in the first housing. The interior of the second housing is divided into a first cavity and a second cavity by a hot air drying plate. A cooling mechanism is provided in the first cavity. The cooling mechanism includes a cooling base and a driving mechanism for driving the cooling base to rotate. Air outlet holes are evenly opened on the bottom surface of the cooling base. The inner wall of the third housing is connected to a bearing for pressing the fabric and transfer paper together, and is equipped with an upper pressure plate and a lower pressure plate for heating and pressurizing. A second electric heating wire is welded to the inner wall of the top surface of the lower pressure plate, and a control mechanism is provided on the upper pressure plate for controlling the power supply of the second conveying roller and the second electric heating wire.

2. The high colorfastness chemical fiber knitted fabric printing and forming device according to claim 1, characterized in that: The air guide box and cover plate are combined into a hollow square structure, and the side wall of the air guide box is welded to the inner wall of the second shell.

3. The high colorfastness chemical fiber knitted fabric printing and forming device according to claim 1, characterized in that: The first conveying roller and the first idler roller are located on both sides of the hot air drying plate, and both the first conveying roller and the first idler roller are connected to the bearing on the inner wall of the first housing. The second idler roller is located in the first cavity, and the third idler roller is located in the second cavity. Both the second idler roller and the third idler roller are connected to the bearing on the inner wall of the second housing. The fourth idler roller is connected to the bearing on the inner wall of the third housing.

4. The high colorfastness chemical fiber knitted fabric printing and forming device according to claim 1, characterized in that: The drive mechanism includes a fixed box with a hollow cylindrical structure. The outer wall of the fixed box is connected to an air inlet pipe and an air outlet pipe. The fixed box is equipped with blades, and the blades are fixed to the vertical rod by locking pins. The bottom end of the vertical rod passes through the fixed cylinder and is welded to the inner wall of the air-cooled base; the vertical rod is connected to the bearing of the inner wall of the fixed cylinder. The air outlet pipe is connected to the fixed cylinder through a connecting pipe.

5. The high colorfastness chemical fiber knitted fabric printing and forming device according to claim 4, characterized in that: The air-cooled base has an inverted trapezoidal cross-section and is generally elongated. A fixed cylinder connected to its bearing passes through the top surface of the air-cooled base, and the top of the fixed cylinder passes through the top wall of the second housing and is welded to the second housing.

6. The high colorfastness chemical fiber knitted fabric printing and forming device according to claim 1, characterized in that: The upper and lower pressure plates are parallel to each other, and the opposite sides of the upper and lower pressure plates are horizontal, with rounded corners on the opposite sides of the upper and lower pressure plates.

7. The high colorfastness chemical fiber knitted fabric printing and forming device according to claim 6, characterized in that: Both sides of the upper and lower pressure plates are bolted with sliding seats, and the inner wall of the third housing is bolted with a slide rail that matches the sliding seats. The upper pressure plate is welded to both sides with a first rack, and the lower pressure plate is welded to both sides with a second rack. The first rack and the second rack are parallel to each other. Both the first rack and the second rack mesh with a transmission gear. The transmission gear is fixed to a fixed shaft with a pin. One end of the fixed shaft is connected to a bearing in the third housing wall. A fixing plate is welded to the inner wall of the third housing, and a hydraulic cylinder is bolted to the fixing plate. The output end of the hydraulic cylinder is welded to the top surface of the upper pressure plate.

8. The high colorfastness chemical fiber knitted fabric printing and forming device according to claim 1, characterized in that: The control mechanism includes a first protrusion and a second protrusion bolted to the side of the upper pressure plate, a first micro switch cooperating with the first protrusion, and a second micro switch cooperating with the second protrusion. Both the first protrusion and the second protrusion are right-angled trapezoidal structures.

9. The high colorfastness chemical fiber knitted fabric printing and forming device according to claim 1, characterized in that: An installation cylinder is fixedly bonded to the side wall of the lower pressure plate, and an insulating sheet is fixedly bonded to the inner wall of the third housing opposite to the installation cylinder. A first metal sheet is bonded to the installation cylinder, and a long strip of second metal sheet is bonded to the insulating sheet. One end of the second electric heating wire passes through the mounting cylinder and is soldered to the first metal sheet, with the first and second metal sheets in contact.

10. A molding process for a high colorfastness chemical fiber knitted fabric printing molding apparatus according to any one of claims 1-9, characterized in that: Includes the following steps, 1. The chemical fiber knitted fabric to be printed is fed into the first shell for drying and dehydration; 2. The patterned transfer paper is fed into the first housing for preheating; Third, the dried and dehydrated chemical fiber knitted fabric is sent into the second shell for air cooling. Fourth, the air-cooled chemical fiber knitted fabric and the preheated transfer paper are fed into the third housing, and the heat sublimation transfer printing operation is completed under the heating and pressure of the upper and lower pressure plates.

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