Polyester cotton printed cloth production equipment and production process
By using movable pressing rollers and hot air fans driven by servo motors in polyester-cotton printed fabric production equipment, the problem of wrinkles during the drying process of polyester-cotton printed fabrics is solved, and the flat and uniform drying of the printed fabrics is achieved.
Patent Information
- Application Number
- CN202510546298.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2025-08-12
AI Technical Summary
In the prior art, polyester-cotton printed cloth is prone to wrinkles during the drying process, resulting in uneven printing cloth and affecting quality.
A polyester-cotton printed fabric production equipment is adopted, including a drying box, a pumping component, a movable press roller and a hot air fan. The movable press roller is driven to contact the printed fabric through a servo motor-driven installation rod, and dry it evenly with hot air to prevent the occurrence of wrinkles.
It effectively avoids wrinkles of the printed cloth during the transmission process, ensures the flatness of the printed cloth, and improves the uniformity of the drying.
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Figure CN120466969A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of printed cloth production, in particular to a polyester-cotton printed cloth production device and a production process. Background Art
[0002] Drying polyester-cotton printed fabric is an important step in the production process. Patent publication number CN218511403U discloses a printed fabric drying device with an anti-wrinkle mechanism, which relates to the technical field of printed fabric production. The device comprises a base, a fixed box fixed to the top of the base, a dryer fixed to the top of the fixed box, a connecting pipe fixed to the bottom of the dryer, and an air outlet pipe fixed to the bottom of the connecting pipe. The inner wall of the fixed box is rotatably mounted on a rotating rod, and a pressure roller fixed to the outer wall of the rotating rod. The fixed box is provided with a control mechanism and a spoiler mechanism. The control mechanism includes a fixed block fixed to the inner wall of the fixed box and a return spring, one side of which is fixed to the fixed block. The printed fabric drying device with an anti-wrinkle mechanism, by providing a pressure roller, can flatten the printed fabric when it is rolled up, thereby preventing wrinkles in the printed fabric during rolling, which would affect the quality of the printed fabric.
[0003] In the above patent, the printed cloth is only flattened by a pressing roller. However, if the printed cloth has wrinkles before reaching the pressing roller, then when the printed cloth passes through the pressing roller, the pressing roller will flatten the wrinkles, which will still cause the printed cloth to become uneven. Summary of the Invention
[0004] (1) Technical problems solved
[0005] In view of the deficiencies in the prior art, the present invention provides a polyester-cotton printed cloth production device and a production process, which solve the defects and deficiencies in the prior art.
[0006] (2) Technical solution
[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A polyester-cotton printed cloth production equipment includes a production workbench, the upper surface of the production workbench is fixedly connected to a drying box, two groups of exhaust components are installed on the top of the drying box, two groups of first mounting plates are provided inside the drying box, the number of each group of first mounting plates is two, and the two first mounting plates are arranged up and down and fixedly installed on the inner wall of the drying box, the side wall of the first mounting plate is penetrated by a through-hole, a first mounting rod is slidably connected to the inside of the through-hole, a power component that drives the first mounting rod to move is installed on the inner wall of the drying box, one end of the first mounting rod is rotatably connected to a first fixed column, a limiting component is installed on the side wall of the first fixed column, the lower surface of the first fixed column is fixedly connected to a second mounting rod, and the end of the second mounting rod away from the first fixed column is fixedly connected to a mounting box body, the lower surface of the mounting box body is rotatably connected to a movable pressing roller, the lower surface of the mounting box body is fixedly connected to a plurality of jet branches, and two groups of hot air components are installed on the upper surface of the production workbench.
[0008] Preferably, the exhaust assembly includes an exhaust pump body fixedly connected to the top of the drying box, the inlet of the exhaust pump body is fixedly connected to a first exhaust pipe, the end of the first exhaust pipe away from the exhaust pump body is fixedly connected to the top of the drying box, and the outlet of the exhaust pump body is fixedly connected to a second exhaust pipe.
[0009] Preferably, a track groove is opened inside the through-opening, and a first sliding block is fixedly connected to the outer surface of the first mounting rod. The first sliding block is slidably connected to the inside of the track groove, and the track groove consists of two horizontal grooves and two inclined grooves.
[0010] Preferably, the power assembly includes a second mounting plate fixedly connected to the inner wall of the drying box, a servo motor is fixedly connected to the side wall of the second mounting plate, the output shaft of the servo motor is fixedly connected to the second fixed column, the surface of the second fixed column is fixedly connected to the second multi-stage telescopic rod, the free end of the second multi-stage telescopic rod is fixedly connected to the second mounting block, one side of the second mounting block is connected to the first mounting rod, the servo motor is started, the output shaft of the servo motor drives the second fixed column to rotate, the second fixed column drives the second mounting block to rotate through the second multi-stage telescopic rod, so that the first mounting rod moves along the track groove, at this time, the first fixed column drives the mounting box body to move through the second mounting rod.
[0011] Preferably, the limiting assembly includes a first multi-stage telescopic rod fixedly connected to the side wall of the first fixed column, the free end of the first multi-stage telescopic rod is fixedly connected to the first mounting block, the side wall of the first mounting block is fixedly connected to the second sliding block, a sliding groove is provided on the inner wall of the drying box, the second sliding block is slidably connected to the inside of the sliding groove, and the first multi-stage telescopic rod and the first mounting block are matched to prevent the first fixed column from rotating, so that the jet branch pipe and the movable pressing roller are always kept facing the printed cloth.
[0012] Preferably, the hot air component includes a hot air blower fixedly connected to the upper surface of the production workbench, the outlet of the hot air blower is fixedly connected to a first hot air pipe, the end of the first hot air pipe away from the hot air blower is fixedly connected to a second hot air pipe, both ends of the second hot air pipe are fixedly connected to installation hoses, the end of the installation hose away from the second hot air pipe extends to the interior of the drying box and is fixedly connected to the corresponding installation box. When the hot air blower is started, the hot air generated by the hot air blower passes through the first hot air pipe and enters the interior of the second hot air pipe, and then enters the interior of the two installation hoses through the second hot air pipe. The hot air enters the interior of the corresponding installation box through the installation hose, and the hot air inside the installation box is ejected through multiple jet branches.
[0013] Preferably, a feed port is provided on one side of the drying box, and a discharge port is provided on the other side of the drying box. The interior of the drying box is movably connected with multiple sets of guide rollers, and the polyester-cotton printed cloth is fed into the feed port of the drying box, passes through the multiple sets of guide rollers, and then comes out from the discharge port of the drying box.
[0014] A polyester-cotton printed cloth production process, the production process comprising the following steps:
[0015] S1. Feed the polyester-cotton printed fabric into the drying box from the feed port, pass through multiple sets of guide rollers, and then exit from the discharge port of the drying box;
[0016] S2. Start the hot air blower. The hot air generated by the hot air blower passes through the first hot air pipe and enters the interior of the second hot air pipe. Then, it passes through the second hot air pipe and enters the interior of the two installation hoses. The hot air passes through the installation hoses and enters the interior of the corresponding installation box. The hot air inside the installation box is ejected through multiple air jet branches, so that the hot air is sprayed onto the upper and lower surfaces of the polyester-cotton printed fabric.
[0017] S3. Start the servo motor. The output shaft of the servo motor rotates the second fixed column. The second fixed column rotates the second mounting block via the second multi-stage telescopic rod, so that the first mounting rod moves along the track groove. At this time, the first fixed column moves the mounting box body via the second mounting rod. Initially, when the first mounting rod moves in the horizontal groove away from the polyester-cotton printed fabric, the movable nip roller does not contact the surface of the polyester-cotton printed fabric. When the first mounting rod moves into the horizontal groove close to the polyester-cotton printed fabric, the movable nip roller contacts the surface of the polyester-cotton printed fabric. When the two movable nip rollers in the same group continue to move, the two movable nip rollers will pull the polyester-cotton printed fabric to the side.
[0018] S4. When the first mounting rod moves to the end of the horizontal groove close to the polyester-cotton printed cloth, it moves back to the horizontal groove away from the polyester-cotton printed cloth through the inclined groove to continue pulling the polyester-cotton printed cloth next time.
[0019] (3) Beneficial effects
[0020] The present invention provides a polyester-cotton printed cloth production device and production process, which has the following beneficial effects:
[0021] 1. In the present invention, the first fixed column moves with the installation box body through the second installation rod. Initially, when the first installation rod moves in the horizontal groove far away from the polyester-cotton printed cloth, the movable nip roller does not contact the surface of the polyester-cotton printed cloth. When the first installation rod moves into the horizontal groove close to the polyester-cotton printed cloth, the movable nip roller contacts the surface of the polyester-cotton printed cloth. When the two movable nip rollers in the same group continue to move, the two movable nip rollers will pull the polyester-cotton printed cloth to the side, effectively avoiding wrinkles in the printed cloth during transportation.
[0022] 2. In the present invention, the hot air blower is started, and the hot air generated by the hot air blower passes through the first hot air pipe and enters the interior of the second hot air pipe, and then enters the interior of the two installation hoses through the second hot air pipe. The hot air enters the interior of the corresponding installation box through the installation hose, and the hot air inside the installation box is ejected through multiple jet branches, so that the hot air is sprayed onto the upper and lower surfaces of the polyester-cotton printed cloth, making the printed cloth dried more evenly. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 A schematic diagram of the three-dimensional structure of a polyester-cotton printed cloth production device provided by the present invention;
[0024] Figure 2 A schematic diagram of the internal structure of a polyester-cotton printed cloth production device provided by the present invention;
[0025] Figure 3 A top view of a polyester-cotton printed cloth production device provided by the present invention;
[0026] Figure 4 A schematic diagram of the arrangement of the first mounting plate of a polyester-cotton printed fabric production device provided by the present invention;
[0027] Figure 5 A schematic diagram of a first mounting plate from a first viewing angle of a polyester-cotton printed fabric production device provided by the present invention;
[0028] Figure 6 This is a schematic diagram of a second viewing angle of a first mounting plate of a polyester-cotton printed cloth production equipment provided by the present invention.
[0029] Among them, 1. production workbench; 2. drying box body; 3. vacuum pump body; 4. first vacuum pipe; 5. second vacuum pipe; 6. first mounting plate; 7. through-hole; 8. track groove; 9. first mounting rod; 10. first fixed column; 11. first mounting block; 12. first multi-stage telescopic rod; 13. second mounting rod; 14. mounting box body; 15. jet branch pipe; 16. movable pressing roller; 17. second mounting plate; 18. servo motor; 19. second fixed column; 20. second multi-stage telescopic rod; 21. second mounting block; 22. hot air blower; 23. first hot air pipe; 24. second hot air pipe; 25. mounting hose; 26. guide roller. DETAILED DESCRIPTION
[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0031] Example:
[0032] like Figures 1 to 6As shown, an embodiment of the present invention provides a polyester-cotton printed cloth production device, including a production workbench 1, the upper surface of the production workbench 1 is fixedly connected to a drying box 2, one side of the drying box 2 is provided with a feed port, the other side of the drying box 2 is provided with a discharge port, the interior of the drying box 2 is movably connected to multiple groups of guide rollers 26, the top of the drying box 2 is equipped with two groups of exhaust components, the exhaust components include an exhaust pump body 3 fixedly connected to the top of the drying box 2, the inlet of the exhaust pump body 3 is fixedly connected to a first exhaust pipe 4, the end of the first exhaust pipe 4 away from the exhaust pump body 3 is fixedly connected to the top of the drying box 2, and the outlet of the exhaust pump body 3 is fixedly connected to the top of the drying box 2. The second exhaust pipe 5 is fixedly connected, and the hot air blower 22 is started. The hot air generated by the hot air blower 22 passes through the first hot air pipe 23 and enters the interior of the second hot air pipe 24, and then enters the interior of the two installation hoses 25 through the second hot air pipe 24. The hot air enters the corresponding installation box body 14 through the installation hose 25. The hot air inside the installation box body 14 is ejected through multiple jet branch pipes 15, so that the hot air is sprayed onto the upper and lower surfaces of the polyester-cotton printed fabric. When the installation box body 14 moves, it also carries the multiple jet branch pipes 15 with it. During the movement of the multiple jet branch pipes 15, the hot air is evenly sprayed onto the upper and lower surfaces of the polyester-cotton printed fabric.
[0033] Two groups of first mounting plates 6 are provided inside the drying box body 2, and the number of each group of first mounting plates 6 is two, and the two first mounting plates 6 are arranged up and down and fixedly installed on the inner wall of the drying box body 2, and a through-hole 7 is opened through the side wall of the first mounting plate 6, and a first mounting rod 9 is slidably connected inside the through-hole 7, and a track groove 8 is opened inside the through-hole 7. The outer surface of the first mounting rod 9 is fixedly connected to the first sliding block, and the first sliding block is slidably connected to the inside of the track groove 8, and the track groove 8 consists of two sections of horizontal grooves and two sections of inclined grooves. At the beginning, when the first mounting rod 9 moves in the horizontal groove away from the polyester-cotton printed cloth, the movable pressing roller 16 does not contact the surface of the polyester-cotton printed cloth. When the first mounting rod 9 moves into the horizontal groove close to the polyester-cotton printed cloth, the movable pressing roller 16 contacts the surface of the polyester-cotton printed cloth. During the continuous movement of the two movable pressing rollers 16 in the same group, the two movable pressing rollers 16 will pull the polyester-cotton printed cloth to the side;
[0034] A power assembly for driving the first mounting rod 9 to move is installed on the inner wall of the drying box body 2, and the power assembly includes a second mounting plate 17 fixedly connected to the inner wall of the drying box body 2, and a servo motor 18 is fixedly connected to the side wall of the second mounting plate 17. The output shaft of the servo motor 18 is fixedly connected to a second fixed column 19, and the surface of the second fixed column 19 is fixedly connected to a second multi-stage telescopic rod 20. The free end of the second multi-stage telescopic rod 20 is fixedly connected to a second mounting block 21, and one side of the second mounting block 21 is connected to the first mounting rod 9. When the servo motor 18 is started, the output shaft of the servo motor 18 rotates the second fixed column 19, and the second fixed column 19 rotates with the second mounting block 21 through the second multi-stage telescopic rod 20, so that the first mounting rod 9 moves along the track groove 8. At this time, the first fixed column 10 moves with the mounting box body 14 through the second mounting rod 13;
[0035] One end of the first mounting rod 9 is rotatably connected to a first fixed column 10, and a limit assembly is installed on the side wall of the first fixed column 10. The limit assembly includes a first multi-stage telescopic rod 12 fixedly connected to the side wall of the first fixed column 10, and the free end of the first multi-stage telescopic rod 12 is fixedly connected to a first mounting block 11. A second sliding block is fixedly connected to the side wall of the first mounting block 11. A sliding groove is opened on the inner wall of the drying box 2, and the second sliding block is slidably connected to the inside of the sliding groove;
[0036] The lower surface of the first fixed column 10 is fixedly connected to the second mounting rod 13, and the end of the second mounting rod 13 away from the first fixed column 10 is fixedly connected to the mounting box body 14, the lower surface of the mounting box body 14 is rotatably connected to the movable pressing roller 16, and the lower surface of the mounting box body 14 is fixedly connected to a plurality of jet branches 15. Two groups of hot air components are installed on the upper surface of the production workbench 1, and the hot air components include a hot air blower 22 fixedly connected to the upper surface of the production workbench 1, and the outlet of the hot air blower 22 is fixedly connected to the first hot air pipe 23, and the end of the first hot air pipe 23 away from the hot air blower 22 is fixedly connected to the second hot air pipe 24, and both ends of the second hot air pipe 24 are fixedly connected to the mounting hose 25, and the end of the mounting hose 25 away from the second hot air pipe 24 extends to the interior of the drying box body 2 and is fixedly connected to the corresponding mounting box body 14.
[0037] The present invention also includes a polyester-cotton printed cloth production process, which comprises the following steps:
[0038] S1, feed the polyester-cotton printed fabric into the drying box 2 from the feed port, pass through multiple sets of guide rollers 26, and then come out from the discharge port of the drying box 2;
[0039] S2. Start the hot air blower 22. The hot air generated by the hot air blower 22 passes through the first hot air pipe 23 and enters the interior of the second hot air pipe 24. Then, the hot air passes through the second hot air pipe 24 and enters the interior of the two installation hoses 25. The hot air passes through the installation hoses 25 and enters the interior of the corresponding installation box 14. The hot air inside the installation box 14 is ejected through the multiple jet branch pipes 15, so that the hot air is sprayed onto the upper and lower surfaces of the polyester-cotton printed fabric.
[0040] S3. Start the servo motor 18. The output shaft of the servo motor 18 rotates the second fixed column 19. The second fixed column 19 rotates the second mounting block 21 via the second multi-stage telescopic rod 20, so that the first mounting rod 9 moves along the track groove 8. At this time, the first fixed column 10 moves the mounting box body 14 via the second mounting rod 13. Initially, when the first mounting rod 9 moves in the horizontal groove away from the polyester-cotton printed fabric, the movable nip roller 16 does not contact the surface of the polyester-cotton printed fabric. When the first mounting rod 9 moves into the horizontal groove close to the polyester-cotton printed fabric, the movable nip roller 16 contacts the surface of the polyester-cotton printed fabric. When the two movable nip rollers 16 in the same group continue to move, the two movable nip rollers 16 will pull the polyester-cotton printed fabric to the side.
[0041] S4. When the first mounting rod 9 moves to the end of the horizontal groove close to the polyester-cotton printed cloth, it moves back to the horizontal groove away from the polyester-cotton printed cloth through the inclined groove to continue pulling the polyester-cotton printed cloth next time.
[0042] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the statement "comprising a reference structure" does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.
[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A polyester-cotton printed fabric production device, comprising a production workbench (1), characterized in that: The upper surface of the production workbench (1) is fixedly connected to a drying box (2), and two groups of exhaust components are installed on the top of the drying box (2). Two groups of first mounting plates (6) are provided inside the drying box (2), and the number of the first mounting plates (6) in each group is two, and the two first mounting plates (6) are arranged up and down and fixedly installed on the inner wall of the drying box (2). A through-hole (7) is opened through the side wall of the first mounting plate (6), and a first mounting rod (9) is slidably connected inside the through-hole (7). A driving mechanism for moving the first mounting rod (9) is installed on the inner wall of the drying box (2). The invention relates to a power component, wherein one end of the first mounting rod (9) is rotatably connected to the first fixed column (10), a limit assembly is installed on the side wall of the first fixed column (10), the lower surface of the first fixed column (10) is fixedly connected to the second mounting rod (13), the end of the second mounting rod (13) away from the first fixed column (10) is fixedly connected to the mounting box body (14), the lower surface of the mounting box body (14) is rotatably connected to the movable pressing roller (16), the lower surface of the mounting box body (14) is fixedly connected to a plurality of jet branch pipes (15), and the upper surface of the production workbench (1) is installed with two groups of hot air components.
2. The polyester-cotton printed cloth production equipment according to claim 1, characterized in that: The exhaust assembly comprises an exhaust pump body (3) fixedly connected to the top of the drying box body (2); the inlet of the exhaust pump body (3) is fixedly connected to a first exhaust pipe (4); one end of the first exhaust pipe (4) away from the exhaust pump body (3) is fixedly connected to the top of the drying box body (2); and the outlet of the exhaust pump body (3) is fixedly connected to a second exhaust pipe (5).
3. The polyester-cotton printed cloth production equipment according to claim 2, characterized in that: A track groove (8) is provided inside the through opening (7), and a first sliding block is fixedly connected to the outer surface of the first mounting rod (9). The first sliding block is slidably connected inside the track groove (8), and the track groove (8) consists of two horizontal grooves and two inclined grooves.
4. The polyester-cotton printed cloth production equipment according to claim 3, characterized in that: The power assembly comprises a second mounting plate (17) fixedly connected to the inner wall of the drying box (2); a servo motor (18) is fixedly connected to the side wall of the second mounting plate (17); an output shaft of the servo motor (18) is fixedly connected to a second fixing column (19); a second multi-stage telescopic rod (20) is fixedly connected to the surface of the second fixing column (19); a free end of the second multi-stage telescopic rod (20) is fixedly connected to a second mounting block (21); and one side of the second mounting block (21) is connected to the first mounting rod (9).
5. The polyester-cotton printed cloth production equipment according to claim 4, characterized in that: The limiting assembly comprises a first multi-stage telescopic rod (12) fixedly connected to the side wall of the first fixed column (10), the free end of the first multi-stage telescopic rod (12) is fixedly connected to the first mounting block (11), the side wall of the first mounting block (11) is fixedly connected to the second sliding block, the inner wall of the drying box (2) is provided with a sliding groove, and the second sliding block is slidably connected inside the sliding groove.
6. The polyester-cotton printed cloth production equipment according to claim 5, characterized in that: The hot air component comprises a hot air blower (22) fixedly connected to the upper surface of the production workbench (1), the outlet of the hot air blower (22) is fixedly connected to a first hot air pipe (23), the end of the first hot air pipe (23) away from the hot air blower (22) is fixedly connected to a second hot air pipe (24), both ends of the second hot air pipe (24) are fixedly connected to a mounting hose (25), and the end of the mounting hose (25) away from the second hot air pipe (24) extends to the interior of the drying box (2) and is fixedly connected to the corresponding mounting box (14).
7. The polyester-cotton printed cloth production equipment according to claim 6, characterized in that: A material feed port is provided on one side of the drying box (2), and a material discharge port is provided on the other side of the drying box (2). Multiple groups of guide rollers (26) are movably connected inside the drying box (2).
8. The production process of the polyester-cotton printed cloth production equipment according to claim 7, characterized in that: The production process comprises the following steps: S1, feeding the polyester-cotton printed fabric into the drying box (2) from the feed port, passing through multiple sets of guide rollers (26), and then out of the discharge port of the drying box (2); S2, start the hot air blower (22), the hot air generated by the hot air blower (22) passes through the first hot air pipe (23), enters the interior of the second hot air pipe (24), and then enters the interior of the two installation hoses (25) through the second hot air pipe (24), and the hot air enters the interior of the corresponding installation box (14) through the installation hose (25), and the hot air inside the installation box (14) is ejected through the multiple jet branch pipes (15), so that the hot air is sprayed onto the upper and lower surfaces of the polyester-cotton printed fabric; S3, start the servo motor (18), the output shaft of the servo motor (18) rotates with the second fixed column (19), and the second fixed column (19) rotates with the second mounting block (21) through the second multi-stage telescopic rod (20), so that the first mounting rod (9) moves along the track groove (8). At this time, the first fixed column (10) moves with the mounting box (14) through the second mounting rod (13). At the beginning, when the first mounting rod (9) moves in the horizontal groove away from the polyester-cotton printed fabric, the movable pressing roller (16) does not contact the surface of the polyester-cotton printed fabric. When the first mounting rod (9) moves into the horizontal groove close to the polyester-cotton printed fabric, the movable pressing roller (16) contacts the surface of the polyester-cotton printed fabric. When the two movable pressing rollers (16) in the same group continue to move, the two movable pressing rollers (16) will pull the polyester-cotton printed fabric to the side. S4. When the first mounting rod (9) moves to the end of the horizontal groove close to the polyester-cotton printed cloth, it moves back to the horizontal groove away from the polyester-cotton printed cloth through the inclined groove to continue pulling the polyester-cotton printed cloth for the next time.
Citation Information
Patent Citations
Printed cloth drying equipment with anti-wrinkle mechanism
CN218511403U