High-precision printing device capable of controlling drying temperature of base material

Abstract

A high-precision printing device capable of controlling the drying temperature of a base material comprises a plurality of printing units arranged in a machine box, each printing unit at least comprises a composite impressing roller, any two adjacent composite impressing rollers are attached to each other, a material belt is made to be attached to the outer walls of the composite impressing rollers all the time when conveyed among the multiple composite impressing rollers, and the composite impressing rollers are attached to the outer walls of the composite impressing rollers. A printing roller set is arranged on the side of a part of the composite impressing rollers, and the printing roller set is used for printing ink on the surface of the material belt. According to the invention, a plurality of composite impressing rollers which are sequentially arranged in a contact manner are arranged, so that a material belt conveyed on the surfaces of the composite impressing rollers cannot be deformed due to suspended pulling, the printing precision of the material belt is ensured, meanwhile, the number and the position of the plurality of composite impressing rollers are flexible and adjustable, and printing roller groups arranged on the outer sides of the corresponding composite impressing rollers are relatively flexible; therefore, double-face printing of the material belt can be completed, the number of the printing roller sets can be flexibly adjusted, and the high flexibility is achieved so as to meet different requirements.

Description

Technical Field

[0001] This invention belongs to the field of woven bag processing technology, specifically referring to a high-precision printing device with controllable substrate drying temperature. Background Technology

[0002] The production of woven bags requires first granulating the plastic raw materials, then processing them into flat yarns through a drawing process, and then weaving and coating the flat yarns to obtain a composite woven fabric base. Subsequently, the main processes such as printing, cutting, and sewing are carried out. The printing of woven bags mainly uses a flexographic printing machine, which utilizes the elastic deformation characteristics of the flexible printing plate. The ink is evenly transferred to the image area of ​​the printing plate through the anilox roller, and then the impression cylinder applies pressure to transfer the ink to the surface of the substrate (woven bag) to form clear images.

[0003] Printing on woven bags typically employs a satellite flexographic printing press. This press uses a large-diameter central impression cylinder as its core, with each printing unit arranged around it in a satellite-like pattern. During operation, the substrate rotates close to the surface of the impression cylinder, passing sequentially through each printing unit to complete multi-color printing. It offers advantages such as high printing accuracy, high speed, and stable registration. However, the number of printing units is limited by the diameter of the central printing cylinder. If multi-color printing is required, the diameter of the central printing cylinder must be increased, resulting in a larger equipment size, thus presenting certain limitations. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the purpose of the present invention is to provide a high-precision printing apparatus with controllable substrate drying temperature, so as to at least partially solve the problems mentioned in the background art.

[0005] The technical solution adopted by the present invention is as follows: A high-precision printing device with controllable substrate drying temperature is proposed, including multiple printing units arranged in a machine box. Each printing unit includes at least one composite impression roller. The conveying path of the material strip outside the multiple composite impression rollers is in a serpentine structure, and the wrapping angle of the material strip outside each composite impression roller is greater than or equal to 180°. Any two adjacent composite impression rollers are in contact with each other, so that the material strip is always in contact with the outer wall of the composite impression roller when it is conveyed between the multiple composite impression rollers. Each of the printing units further includes a printing roller group, wherein a group of the printing roller groups is provided on the side of a portion of the composite impression rollers, the printing roller groups being configured to print ink onto the surface of the strip.

[0006] Furthermore, the material strip includes a first printing surface and a second printing surface. Along the conveying path of the material strip, a plurality of composite impression rollers are sequentially distributed on the first printing surface and the second printing surface of the material strip. A set of printing rollers for printing ink onto the first printing surface and the second printing surface is respectively provided on the side of some of the composite impression rollers.

[0007] Furthermore, it also includes a drying unit. Each composite impression roller equipped with the printing roller group has a drying unit on its outer side. Along the conveying direction of the printing roller group, the drying unit is located on the rear side of the printing roller group. The drying unit is configured to discharge hot air to the surface of the material strip for drying the ink printed on the surface of the material strip.

[0008] Furthermore, the plurality of composite impression rollers are arranged vertically inside the machine housing, and the line connecting the axes of the plurality of composite impression rollers is either a zigzag line or a straight line. Or multiple composite impression rollers are arranged horizontally inside the machine housing, and the line connecting the axes of the multiple composite impression rollers is a zigzag or a straight line; One or more of the composite impression rollers are arranged vertically and horizontally inside the machine housing, and the line connecting the axes of the multiple composite impression rollers is a zigzag or a straight line.

[0009] Furthermore, the angle formed by the line connecting any three adjacent composite impression roller axes is A, where 60° < A ≤ ~180°.

[0010] Furthermore, the composite impression roller includes: An impression roller sleeve, wherein the surface of the impression roller sleeve is provided with a decorative groove corresponding to the decorative area on the surface of the material strip; An impression roller cylinder is fixedly installed inside the impression roller sleeve, and the surface of the impression roller cylinder is provided with a number of evenly distributed air guide holes. An air supply roller is disposed on the inner side of the impression roller drum, and the air supply roller is rotatably connected to the impression roller drum. The air supply roller is provided with an air guide cavity that communicates with an external air supply device. The decorative groove is connected to the air guide cavity through an air guide hole. The surface of the impression roller sleeve is provided with a guide groove that connects the decorative grooves in the axial direction, so that the hot air flow in the air guide cavity can enter the decorative groove from the air guide hole and then be discharged from the guide groove in the axial direction.

[0011] Furthermore, a drive shaft is fixedly provided on one side of the printing roller drum, and the drive shaft is connected to the output shaft of the transmission box, so that the multiple printing roller drums rotate synchronously. A bushing is fixedly provided on the other side of the printing roller drum, and a positioning guide rod is fixedly provided on one side of the air supply roller. The positioning guide rod is located inside the bushing and is fixed to the inner wall of the machine housing, so that the printing roller drum can rotate outside the air supply roller.

[0012] Furthermore, the air supply roller is provided with a first air supply pipe and a second air supply pipe, both of which are connected to an external air supply device. The airflow temperature in the first air supply pipe is higher than that in the second air supply pipe. The air guide cavity includes a first air guide cavity communicating with the first air supply pipe and a second air guide cavity communicating with the second air supply pipe. A mixing cavity is provided between the air supply roller and the impression roller drum. Multiple mixing fins are fixedly provided on the inner side wall of the impression roller drum.

[0013] Furthermore, the printing roller assembly includes an ink trough, an ink roller, an anilox roller, and a printing plate roller. The ink trough is fixed to the inner wall of the machine housing. The ink roller is disposed inside the ink trough, and a portion of the ink roller is always in contact with the ink in the ink trough during operation. The printing plate roller is rolled and attached to the surface of the composite impression roller. The anilox roller is rotatably disposed between the ink roller and the printing plate roller.

[0014] Furthermore, the drying unit includes an air guide hood and a heating air duct. The heating air duct is connected to an external air supply device. The air guide hood is constructed as an arc-shaped plate coaxial with the composite embossing roller. The inner side of the air guide hood is provided with a plurality of parallel air guide fins. An air hole is provided on the heating air duct between each pair of adjacent air guide fins. The airflow in the heating air duct enters between the air guide fins through the air hole.

[0015] Beneficial effects: This invention, by setting up multiple composite impression rollers that are sequentially attached to each other, prevents the material strip conveyed on the surface of the composite impression rollers from deforming due to suspension and pulling, thus ensuring the printing accuracy of the material strip. At the same time, the number and position of the multiple composite impression rollers are flexibly adjustable, and the printing roller group configured on the outside of the composite impression rollers is also relatively flexible. Therefore, double-sided printing of the material strip can be completed, and the number of printing roller groups can be flexibly adjusted, which has great flexibility to accommodate different needs. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a high-precision printing device with controllable substrate drying temperature proposed in an embodiment of the present invention; Figure 2This is a schematic diagram of the internal structure of a high-precision printing device with controllable substrate drying temperature according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the printing unit proposed in an embodiment of the present invention; Figure 4 This invention provides a schematic diagram of the internal structure of a composite impression roller according to an embodiment of the invention. Figure 5 This is a schematic diagram of the structure of the impression roller sleeve and the impression roller drum proposed in an embodiment of the present invention; Figure 6 The present invention provides a schematic diagram of the structure of a drying unit according to an embodiment of the present invention.

[0017] Among them, 01 is the chassis; 011 is the feed window; 012 is the discharge window; 013 is the guide roller; 02 is the material belt; 10 is the composite impression roller; 11 is the impression roller sleeve; 110 is the decorative groove; 111 is the guide groove; 12 is the impression roller drum; 120 is the air guide hole; 121 is the mixing fin; 122 is the drive shaft; 123 is the bushing; 13 is the air supply roller; 130 is the air mixing chamber; 1301 is the first air guide chamber; 1302 is the second air guide chamber; 131 is the positioning guide rod; 1311 is the first air supply pipe; 1312 is the second air supply pipe; 20 is the printing roller group; 21 is the ink trough; 22 is the ink roller; 23 is the anilox roller; 24 is the printing plate roller; 30 is the drying unit; 31 is the air guide hood; 311 is the air guide fin; 32 is the heating air pipe; 40 is the transmission box; 41 is the driver.

[0018] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0020] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments.

[0021] Satellite flexographic printing presses offer advantages such as high printing precision and stable registration; however, the number of printing units is limited by their size. Typically, a satellite flexographic printing press has four to six printing units, and it cannot perform double-sided printing, thus having certain limitations. Figure 1 and Figure 2 As shown, this embodiment of the invention provides a high-precision printing device with controllable substrate drying temperature, aiming to solve the problem that the current satellite flexographic printing machine has a limited number of printing units and cannot print on both sides. The device mainly includes a chassis 01 and multiple printing units arranged inside the chassis 01. One side of the chassis 01 has a feed window 011 and the other side has a discharge window 012. The material belt 02 enters the chassis 01 through the feed window 011, passes through multiple printing units, and is discharged from the discharge window 012. Guide rollers 013 are provided near the printing units so that the material belt 02 can pass through the printing units according to a set path.

[0022] Each printing unit includes at least one composite impression roller 10. The conveying path of the material strip 02 outside the multiple composite impression rollers 10 is in a serpentine structure, and the wrapping angle of the material strip 02 outside each composite impression roller 10 is greater than or equal to 180°. Any two adjacent composite impression rollers 10 are in contact with each other, so that the material strip 02 is always in contact with the outer wall of the composite impression roller 10 when it is conveyed between the multiple composite impression rollers 10.

[0023] When the material strip 02 is conveyed between the composite impression rollers 10, since the material strip 02 is always in contact with the outer wall of the multiple composite impression rollers 10 along the conveying path and there is no suspended area, it can be ensured that the material strip 02 will not be deformed due to pulling during the conveying process between the composite impression rollers 10. In this way, the printing accuracy of the material strip 02 between the composite impression rollers 10 can be guaranteed.

[0024] Furthermore, each printing unit also includes a printing roller group 20, wherein a printing roller group 20 is provided on the side of some composite impression rollers 10. The printing roller group 20 is configured to print ink on the surface of the material strip 02, that is, when the material strip 02 is conveyed between the composite impression rollers 10, it ensures that the material strip 02 does not deform during the conveying process, providing a basis for high-precision printing. The number and position of the printing roller group 20 are configured according to the usage requirements.

[0025] In some embodiments, the printing roller assembly 20 includes an ink trough 21, an ink roller 22, an anilox roller 23, and a printing plate roller 24.

[0026] The ink trough 21 is fixed on the inner wall of the machine housing 01, the ink roller 22 is disposed inside the ink trough 21, and a portion of the ink roller 22 is always in contact with the ink in the ink trough 21 during operation. The printing plate roller 24 is rolled and attached to the surface of the composite impression roller 10, and the anilox roller 23 is rotatably disposed between the ink roller 22 and the printing plate roller 24.

[0027] During operation, the ink trough 21 serves as the source of ink storage and supply. Through the transmission action of the ink roller 22, the ink is evenly delivered to the surface of the anilox roller 23. The anilox roller 23, with its precise cell structure, accurately controls the amount of ink and transfers it to the printing plate roller 24. The printing plate roller 24, carrying the graphic information, and in cooperation with the composite impression roller 10, transfers the graphic ink to the substrate 02 under pressure, ultimately completing the printing process. All components work together in a closed loop through ink transfer, pressure coordination, and synchronized operation, ensuring both printing quality and efficiency.

[0028] Specifically, the material strip 02 (woven bag) includes a first printing surface (front of the woven bag) and a second printing surface (back of the woven bag). Along the conveying path of the material strip 02, multiple composite printing rollers 10 are sequentially distributed on the first printing surface and the second printing surface of the material strip 02. A set of printing rollers 20 for printing ink onto the first printing surface and the second printing surface is respectively provided on the side of some of the composite printing rollers 10.

[0029] Thus, when the composite impression roller 10 is inside the first printing surface of the material strip 02, the outer composite impression roller 10 can print on the second printing surface of the material strip 02. When the composite impression roller 10 is inside the second printing surface of the material strip 02, the outer composite impression roller 10 can print on the first printing surface of the material strip 02. When printing roller groups 20 are arranged on the outer sides of two adjacent composite impression rollers 10, double-sided printing can be performed on the material strip 02. According to this rule, the number and position of printing roller groups 20 can be selected according to the number of colors to be printed on both sides.

[0030] Taking the example of two adjacent composite impression rollers 10 both having printing roller groups 20 arranged on their outer sides, such as... Figure 3 As shown, it includes two composite impression rollers 10. Assuming that when the material strip 02 contacts the upper composite impression roller 10, its first printing surface contacts the surface of the composite impression roller 10, then the printing roller group 20 prints on the second printing surface of the material strip 02. After the second printing surface is printed, it is immediately transferred to the lower composite impression roller 10 to contact the second printing surface. However, at this time, the second printing surface of the material strip 02 has just been printed with ink. In order to dry the ink printed on the surface of the second printing surface before it contacts the lower composite impression roller 10.

[0031] Furthermore, the device also includes a drying unit 30. Each composite impression roller 10 equipped with a printing roller group 20 is provided with a drying unit 30 on its outer side. Along the conveying direction of the printing roller group 20, the drying unit 30 is located on the rear side of the printing roller group 20. The drying unit 30 is configured to discharge hot air to the surface of the material strip 02 for drying the ink printed on the surface of the material strip 02. In this way, the ink printed on the surface of the material strip 02 is dried before it comes into contact with the rear composite impression roller 10.

[0032] like Figure 6 As shown, in some embodiments, the drying unit 30 includes an air guide hood 31 and a heating air duct 32, which is connected to an external air supply device.

[0033] The air guide shroud 31 is constructed as an arc-shaped plate coaxial with the composite embossing roller 10. The inner side of the air guide shroud 31 is provided with multiple parallel air guide fins 311. Air holes are opened on the heating air duct 32 at the arc-shaped grooves between each pair of adjacent air guide fins 311. The airflow in the heating air duct 32 enters between the air guide fins 311 through the air holes.

[0034] During operation, an external air supply device, such as a hot air pump, pumps hot air at a set temperature into the heating air duct 32. The temperature of the hot air is controlled at 40-60℃ and the wind speed is 0.5-1.5m / s. The hot air is delivered from the air holes on the heating air duct 32 to the arc-shaped grooves between the air guide fins 311, and diffuses along the arc-shaped grooves, uniformly guiding it to the surface of the material strip 02 to dry the ink.

[0035] In some embodiments, multiple composite impression rollers 10 are arranged vertically inside the housing 01, and the line connecting the axes of the multiple composite impression rollers 10 is either a zigzag line or a straight line. When the line connecting the axes of the composite impression rollers 10 is a straight line, the overall height of the multiple composite impression rollers 10 is relatively high. When the line connecting the axes of the composite impression rollers 10 is a zigzag line, the overall height of the multiple composite impression rollers 10 will be reduced. Therefore, a zigzag distribution structure is preferred. This arrangement has a relatively small footprint but a high height.

[0036] In another embodiment, multiple composite impression rollers 10 are arranged horizontally inside the housing 01. The line connecting the axes of the multiple composite impression rollers 10 is either a zigzag line or a straight line. When the line connecting the axes of the composite impression rollers 10 is a straight line, the overall length of the multiple composite impression rollers 10 is relatively long. When the line connecting the axes of the composite impression rollers 10 is a zigzag line, the overall length of the multiple composite impression rollers 10 will be reduced. Therefore, a zigzag distribution structure is preferred. This arrangement occupies a relatively large area but is relatively short.

[0037] In another embodiment, a plurality of composite impression rollers 10 are arranged vertically and horizontally within the housing 01, and the line connecting the axes of the plurality of composite impression rollers 10 is either a zigzag line or a straight line, such as... Figure 2 As shown, this composite layout can reduce the height and length of the chassis 01, making the overall size of the chassis 01 more suitable, and allowing for the configuration of more printing roller groups 20.

[0038] Thus, compared to current satellite-type flexographic printing machines, the multiple composite impression rollers 10 of the present invention are arranged in sequential contact, which ensures that the material strip 02 conveyed on the surface of the composite impression rollers 10 does not deform, thereby guaranteeing the printing accuracy of the material strip 02. At the same time, the number and position of the multiple composite impression rollers 10 are flexibly adjustable, and the printing roller group 20 arranged on the outside of the composite impression rollers 10 is also relatively flexible. Therefore, double-sided printing of the material strip 02 can be completed, and the number of printing roller group 20 can be flexibly adjusted, which has great flexibility to accommodate different needs.

[0039] In some embodiments, the angle formed by the line connecting the axes of any three adjacent composite impression rollers 10 is A, where 60° < A ≤ ~180°. The smaller the angle formed by the line connecting the axes of the three composite impression rollers 10, the more compactly the composite impression rollers 10 are arranged. Conversely, the larger the angle formed by the line connecting the axes of the three composite impression rollers 10, the larger the space occupied by the multiple composite impression rollers 10. Figure 2 For example, the angles between the three composite impression rollers 10 include 90° and 180°. By arranging them in a multi-angle manner, the overall volume of the composite impression rollers 10 can be reduced, and the selection can be made according to the requirements.

[0040] Since the two adjacent composite impression rollers 10 are arranged in a compact manner, the conveying path of the material strip 02 on the surface of the composite impression roller 10 is relatively short. The drying unit 30 arranged behind the printing roller group 20 may not be able to completely dry the ink on the material strip 02. In order to avoid ink offset or blurring caused by ink contact with the surface of the composite impression roller 10, the drying unit 30 is arranged behind the printing roller group 20.

[0041] like Figure 3 , Figure 4 and Figure 5 As shown, the composite impression roller 10 includes an impression roller sleeve 11, an impression roller rotating cylinder 12, and an air supply roller 13.

[0042] The air supply roller 13 is disposed inside the impression roller cylinder 12 and is rotatably connected to the impression roller cylinder 12. The air supply roller 13 can provide hot airflow to the inner space of the impression roller cylinder 12. The surface of the impression roller cylinder 12 is provided with several evenly distributed air guide holes 120, through which the hot airflow inside the impression roller cylinder 12 is discharged. The impression roller sleeve 11 is fixedly disposed on the outer side of the impression roller cylinder 12. The surface of the impression roller sleeve 11 is provided with a decorative groove 110 corresponding to the decorative area on the surface of the material strip 02.

[0043] Since the surface of the impression roller sleeve 11 is provided with a textured groove 110 corresponding to the textured area on the surface of the material strip 02, when the material strip 02 passes over the surface of the impression roller sleeve 11, the area where the ink is printed corresponds to the textured groove 110. Therefore, the printed ink will not come into contact with the surface of the impression roller sleeve 11.

[0044] Meanwhile, in order to dry the ink on the surface of the material strip 02 in the texture groove 110 area, air holes corresponding to the air guide holes 120 are also opened in the texture groove 110. Furthermore, the air supply roller 13 is provided with an air guide cavity that communicates with an external air supply device. The texture groove 110 is connected to the air guide cavity through the air guide holes 120. The surface of the impression roller sleeve 11 is provided with a guide groove 111 that connects the texture grooves 110 in the axial direction, so that the hot air flow in the air guide cavity can enter the texture groove 110 through the air guide holes 120 and then be discharged from the guide groove 111 in the axial direction. When the material strip 02 is in contact with the surface of the impression roller sleeve 11, the texture groove 110 can discharge hot air flow to dry the ink on the surface of the material strip 02.

[0045] by Figure 3 For example, when the material strip 02 passes through two composite impression rollers 10 in sequence, the material strip 02 first contacts the upper composite impression roller 10, and its first printing surface contacts the surface of the composite impression roller 10. At this time, hot air can be discharged from the decorative groove 110 on the surface of the impression roller sleeve 11 to dry the ink on the surface of the material strip 02. The printing roller group 20 on the outside of the composite impression roller 10 prints the second printing surface of the material strip 02. In this way, when the material strip 02 passes through the same composite impression roller 10, the ink on one side of the material strip 02 can be dried while the other side is printed.

[0046] It should be understood that during the entire conveying process of the material strip 02 among multiple composite impression rollers 10, in order to ensure that the printing area on the material strip 02 always corresponds to the decorative groove 110 provided on the surface of the impression roller sleeve 11, the contact length between the material strip 02 and the surface of the composite impression roller 10 needs to be equal to the length of a woven bag. In this way, when the material strip 02 is conveyed among multiple composite impression rollers 10, it can be ensured that the printing area on the material strip 02 always corresponds to the decorative groove 110 on the impression roller sleeve 11, so as to ensure that the ink is dried by hot air immediately after printing during the conveying process, and to avoid ink scratching.

[0047] In some embodiments, the contact length of the material strip 02 on the surface of each composite impression roller 10 can be controlled by adjusting the angle between the composite impression rollers 10 or by adjusting the diameter of the composite impression rollers 10.

[0048] Furthermore, a drive shaft 122 is fixedly provided on one side of the shaft end of the impression roller 12. The drive shaft 122 is connected to the output shaft of the transmission box 40. The transmission box 40 is provided with a driver 41 including a motor. Multiple gear sets are provided inside the transmission box 40, so that the gear sets are linked with the output shaft of the driver 41. Through the drive of the driver 41, multiple impression rollers 12 rotate synchronously, and the directions of two adjacent impression rollers 12 are opposite.

[0049] Furthermore, a bushing 123 is fixedly provided on the other side of the shaft end of the impression roller 12, and a positioning guide rod 131 is fixedly provided on one side of the shaft end of the air supply roller 13. The positioning guide rod 131 is located inside the bushing 123 and is fixed on the inner wall of the machine housing 01, so that the impression roller 12 can rotate outside the air supply roller 13.

[0050] During operation, the air supply roller 13 is fixed inside the impression roller cylinder 12 under the action of the positioning guide rod 131. The outer impression roller cylinder 12 and impression roller sleeve 11 rotate under the drive of the driver 41 to convey the material belt 02. The air supply roller 13 provides hot air to the inside of the impression roller cylinder 12 so that the hot air can dry the ink on the surface of the material belt 02 that contacts the impression roller sleeve 11.

[0051] In some embodiments, in order to make the temperature of the airflow more accurate and to avoid the material belt 02 being deformed due to heat when the hot airflow is in contact with the material belt 02, the air supply roller 13 is provided with a first air supply pipe 1311 and a second air supply pipe 1312, both of which are connected to an external air supply device.

[0052] The airflow temperature in the first air supply pipe 1311 is higher than that in the second air supply pipe 1312. The air guide cavity includes a first air guide cavity 1301 connected to the first air supply pipe 1311 and a second air guide cavity 1302 connected to the second air supply pipe 1312. A mixing cavity 130 is provided between the air supply roller 13 and the impression roller 12. Multiple mixing fins 121 are fixed on the inner side wall of the impression roller 12. At the same time, a temperature sensor is provided in the mixing cavity 130 to detect the temperature of the airflow in the mixing cavity 130. The airflow rate introduced into the mixing cavity 130 by the first air supply pipe 1311 and the second air supply pipe 1312 can be configured according to the target temperature so that the final airflow temperature is within the set temperature range. This achieves the drying of ink while avoiding the thermal deformation of the material strip 02 caused by overheating of the airflow temperature, ensuring the stability of the material strip 02 conveying and improving the printing accuracy.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A high-precision printing apparatus with controllable substrate drying temperature, characterized in that, include: Chassis (01); Multiple printing units are arranged inside the machine housing (01). Each printing unit includes at least one composite impression roller (10). The conveying path of the material strip (02) outside the multiple composite impression rollers (10) is in a serpentine structure. The wrapping angle of the material strip (02) outside each composite impression roller (10) is greater than or equal to 180°. Any two adjacent composite impression rollers (10) are in contact with each other, so that the material strip (02) is always in contact with the outer wall of the composite impression roller (10) when it is conveyed between the multiple composite impression rollers (10). Each of the printing units further includes a printing roller group (20), wherein a group of the printing roller group (20) is provided on the side of a portion of the composite impression roller (10), the printing roller group (20) being configured to print ink onto the surface of the strip (02).

2. The high-precision printing apparatus with controllable substrate drying temperature according to claim 1, characterized in that: The material strip (02) includes a first printing surface and a second printing surface. Along the conveying path of the material strip (02), a plurality of composite impression rollers (10) are sequentially distributed on the first printing surface and the second printing surface of the material strip (02). A set of printing rollers (20) for printing ink onto the first printing surface and the second printing surface is respectively provided on the side of some of the composite impression rollers (10).

3. The high-precision printing apparatus with controllable substrate drying temperature according to claim 1, characterized in that: It also includes a drying unit (30), which is provided on the outer side of each composite impression roller (10) provided with the printing roller group (20). Along the conveying direction of the printing roller group (20), the drying unit (30) is located on the rear side of the printing roller group (20). The drying unit (30) is configured to discharge hot air to the surface of the material strip (02) for drying the ink printed on the surface of the material strip (02).

4. The high-precision printing apparatus with controllable substrate drying temperature according to any one of claims 1-3, characterized in that: Multiple composite impression rollers (10) are arranged vertically inside the machine housing (01), and the line connecting the axes of the multiple composite impression rollers (10) is either a broken line or a straight line. Or multiple composite impression rollers (10) are arranged horizontally inside the machine housing (01), and the line connecting the axes of the multiple composite impression rollers (10) is a broken line or a straight line; Or multiple composite impression rollers (10) are arranged in the vertical and horizontal directions inside the machine housing (01), and the line connecting the axes of the multiple composite impression rollers (10) is a broken line or a straight line.

5. The high-precision printing apparatus with controllable substrate drying temperature according to claim 4, characterized in that: The angle formed by the line connecting any three adjacent composite impression rollers (10) axes is A, where 60° < A ≤ ~180°.

6. The high-precision printing apparatus with controllable substrate drying temperature according to any one of claims 1-3, characterized in that: The composite impression roller (10) includes: An impression roller sleeve (11) has a decorative groove (110) on its surface corresponding to the decorative area on the surface of the strip (02). An impression roller cylinder (12) is fixedly disposed on the inner side of the impression roller sleeve (11), and the surface of the impression roller cylinder (12) is provided with a plurality of evenly distributed air guide holes (120). An air supply roller (13) is disposed on the inner side of the impression roller drum (12), and the air supply roller (13) is rotatably connected to the impression roller drum (12); The air supply roller (13) is provided with an air guide cavity that is connected to an external air supply device. The decorative groove (110) is connected to the air guide cavity through the air guide hole (120). The surface of the impression roller sleeve (11) along the axial direction is provided with a guide groove (111) that connects the decorative groove (110) in the axial direction, so that the hot air flow in the air guide cavity can enter the decorative groove (110) through the air guide hole (120) and then be discharged from the guide groove (111) along the axial direction.

7. The high-precision printing apparatus with controllable substrate drying temperature according to claim 6, characterized in that: A drive shaft (122) is fixedly provided on one side of the printing roller (12). The drive shaft (122) is connected to the output shaft of the transmission box (40) so that multiple printing rollers (12) rotate synchronously. A bushing (123) is fixedly provided on the other side of the printing roller (12). A positioning guide rod (131) is fixedly provided on one side of the air supply roller (13). The positioning guide rod (131) is located inside the bushing (123) and is fixed on the inner wall of the machine box (01) so that the printing roller (12) can rotate outside the air supply roller (13).

8. The high-precision printing apparatus with controllable substrate drying temperature according to claim 7, characterized in that: The air supply roller (13) is provided with a first air supply pipe (1311) and a second air supply pipe (1312). Both the first air supply pipe (1311) and the second air supply pipe (1312) are connected to an external air supply device. The air temperature in the first air supply pipe (1311) is higher than the air temperature in the second air supply pipe (1312). The air guide cavity includes a first air guide cavity (1301) connected to the first air supply pipe (1311) and a second air guide cavity (1302) connected to the second air supply pipe (1312). A mixing cavity (130) is provided between the air supply roller (13) and the impression roller cylinder (12). A plurality of mixing fins (121) are fixed on the inner side wall of the impression roller cylinder (12).

9. The high-precision printing apparatus for controlling substrate drying temperature according to claim 1, characterized in that: The printing roller assembly (20) includes an ink trough (21), an ink roller (22), an anilox roller (23), and a printing plate roller (24). The ink trough (21) is fixed on the inner wall of the housing (01). The ink roller (22) is disposed inside the ink trough (21), and a portion of the ink roller (22) is always in contact with the ink in the ink trough (21) during operation. The printing plate roller (24) is rolled and attached to the surface of the composite impression roller (10). The anilox roller (23) is rotatably disposed between the ink roller (22) and the printing plate roller (24).

10. The high-precision printing apparatus with controllable substrate drying temperature according to claim 3, characterized in that: The drying unit (30) includes an air guide hood (31) and a heating air duct (32). The heating air duct (32) is connected to an external air supply device. The air guide hood (31) is constructed as an arc-shaped plate coaxial with the composite embossing roller (10). The inner side of the air guide hood (31) is provided with a plurality of parallel air guide fins (311). Air holes are provided on the heating air duct (32) between each pair of adjacent air guide fins (311). The airflow in the heating air duct (32) enters between the air guide fins (311) through the air holes.

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