Roll printing equipment

Abstract

The invention relates to a reel printing device which comprises an unwinding unit, a guide wheel assembly, a first printing unit, a second printing unit, a first curing lamp, a second curing lamp and a winding unit, the unwinding unit is used for containing a printing material, and the winding unit is used for winding and storing the processed printing material. The guide wheel assembly is used for guiding the printing material to move from the unwinding unit to the winding unit; the first printing unit, the second printing unit, the first curing lamp and the second curing lamp are sequentially arranged on a moving path of a printing material, the first printing unit and the second printing unit are used for imprinting printing ink to the surface of the printing material, and the first curing lamp and the second curing lamp are used for sequentially curing the printing ink on the printing material. According to the roll printing equipment provided by the invention, two printing processes needing curing lamp treatment can be integrated into a complete procedure, so that the effects of the two printing processes are completed on the roll printing equipment at a time, the production cost can be reduced, and the production efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the field of printing technology, and particularly to a web printing device. Background Art

[0002] UV curing means ultraviolet curing, and curing refers to the process of converting a substance from a low molecule to a high molecule. UV curing generally refers to the curing conditions or requirements of coatings, inks, adhesives or other potting sealants that require ultraviolet curing, which is different from heat curing, adhesive curing, natural curing, etc.

[0003] At present, in addition to being applied to color printing of inks, the curing technology can also produce a variety of special effects through the adjustment of ink formulations and the cooperation of curing methods. For example, in the silk screen snowflake process, the printing of the snowflake effect is a relatively popular surface decoration technology for medium and high-grade printed products. The process characteristics are that the surface of the printed product presents a uniform and fine wrinkled and dotted pattern, accompanied by a matte effect, the ink layer is flat, the gloss is soft, and the hand feeling is good. The surface of the printed product seems to be covered with a layer of fine snowflakes, so it is named "snowflake" printing, also known as "ice point" printing. The ink in the snowflake printing process is a cured ink, which contains two types of resins, namely blooming resin and curing resin. Although both of these resins are cured resins, there are differences in their curing reaction rates. In actual operation, 30% to 60% of the curing power is required to pre-explode the snowflake ink without complete curing, so that the film-forming speed on the surface of the ink is different, generating stress and strain, prompting fine wrinkled patterns to appear on the surface of the ink layer, thus producing the "snowflake" printing effect. After the snowflake-like effect is detonated, secondary complete curing is carried out. At present, this process is generally carried out by screen printing, and the curing efficiency is low. Summary of the Invention

[0004] Based on this, the present application provides a web printing device, which can integrate two printing processes that need to be processed by curing lamps into a complete process, so that the effects of the two printing processes are completed at one time on the web printing device, which can reduce production costs and improve production efficiency.

[0005] A web printing device includes an unwinding unit, a guide wheel assembly, a first printing unit, a second printing unit, a first curing lamp, a second curing lamp and a winding unit. The unwinding unit is used to place the printing material, the winding unit is used to wind and store the processed printing material, and the guide wheel assembly is used to guide the printing material to move from the unwinding unit to the winding unit;

[0006] The first printing unit, the second printing unit, the first curing lamp, and the second curing lamp are sequentially arranged on the moving path of the printing material. The first printing unit and the second printing unit are used to imprint ink onto the surface of the printing material, and the first curing lamp and the second curing lamp are used to sequentially cure the ink on the printing material.

[0007] For the above web printing equipment, the first printing unit and the second printing unit are used to imprint ink onto the surface of the printing material, and the first curing lamp and the second curing lamp are used to sequentially cure the ink on the printing material. It can integrate two printing processes that require curing lamps into a complete process, enabling the effects of the two printing processes to be completed at once on the web printing equipment, reducing production costs, and improving production efficiency.

[0008] In one embodiment, a cold stamping assembly is further included. The cold stamping assembly is movably arranged on one side of the path of the printing material between the first curing lamp and the second curing lamp. A cold stamping film is provided on the cold stamping assembly, and the cold stamping film can move with the cold stamping assembly to contact or move away from the surface of the printing material.

[0009] In one embodiment, the cold stamping assembly includes a cold stamping driving member, a cold stamping unwinding unit, a cold stamping pressure guiding roller, and a cold stamping winding unit. The cold stamping film is stored in the cold stamping unwinding unit and moves to the cold stamping winding unit after being guided by the rolling of the cold stamping pressure guiding roller; the guiding wheel assembly includes a pressure contact wheel, and the pressure contact wheel is located on the path of the printing material between the first curing lamp and the second curing lamp and contacts the printing material; the cold stamping unwinding unit, the cold stamping pressure guiding roller, and the cold stamping winding unit are arranged on the cold stamping driving member and can move synchronously under the action of the cold stamping driving member so that the cold stamping film on the cold stamping pressure guiding roller abuts against the printing material on the pressure contact wheel.

[0010] In one embodiment, the power of the second curing lamp is greater than or equal to 3 kW.

[0011] In one embodiment, a lamp body driving member is further included. The lamp body driving member is connected to the second curing lamp and can drive the second curing lamp to move along the moving direction of the printing material.

[0012] In one embodiment, the first curing lamp includes a wrinkling lamp, and the second curing lamp includes a mercury lamp or a halogen lamp.

[0013] In one embodiment, the spacing distance between the first curing lamp and the second curing lamp along the moving path of the printing material is greater than or equal to 1.5 m.

[0014] In one embodiment, the power of the corrugating lamp is 60W to 100W, and the wavelength is 254μm.

[0015] In one embodiment, both the first curing lamp and the second curing lamp are mercury lamps or halogen lamps, and the irradiation power of the second curing lamp is greater than that of the first curing lamp.

[0016] In one embodiment, the guide roller assembly includes a first floating roller, a second floating roller, a first fixed roller, and a second fixed roller that abut against the printing material. The first floating roller and the first fixed roller are located on the path of the printing material between the unwinding unit and the first printing unit, and the first floating roller can move relative to the first fixed roller to adjust the tension of the printing material; the second floating roller and the second fixed roller are located on the path of the printing material between the second curing lamp and the winding unit, and the second floating roller can move relative to the second fixed roller to adjust the winding tension of the printing material. Description of the Drawings

[0017] The following further describes the present invention in conjunction with the drawings and embodiments, where:

[0018] Figure 1 is a schematic structural diagram of a web printing device according to an embodiment;

[0019] Figure 2 is a schematic structural diagram of a web printing device according to an embodiment.

[0020] Reference numerals: Web printing device 10; Printing material 100; Unwinding unit 20; Guide roller assembly 30; Pressure roller 31; First floating roller 32; Second floating roller 33; First fixed roller 34; Second fixed roller 35; First printing unit 40; Second printing unit 50; First curing lamp 61; Second curing lamp 62; Winding unit 70; Cold stamping assembly 80; Cold stamping unwinding unit 81; Cold stamping pressure guide roller 82; Cold stamping winding unit 83 Detailed Description of the Embodiments

[0021] This part will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be construed as a limitation on the protection scope of the present invention.

[0022] In the description of the present invention, "a plurality of" means more than two. Understandings such as "greater than", "less than", and "exceeding" do not include the corresponding number, while understandings such as "above", "below", and "within" include the corresponding number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0023] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0024] In the present invention, unless otherwise clearly defined, terms such as "arranged", "installed", and "connected" should be understood in a broad sense. For example, they can be directly connected, or indirectly connected through an intermediate medium; they can be fixedly connected, or detachably connected, or integrally formed; they can be mechanically connected; they can be the communication inside two components or the interaction relationship between two components. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0025] UV (ultraviolet) curing, also known as ultraviolet curing, refers to the process in which a substance transforms from a low-molecular-weight state to a high-molecular-weight state. UV curing generally refers to the curing conditions or requirements for coatings, inks, adhesives, or other potting and sealing agents that require ultraviolet curing, which is different from heat curing, adhesive curing, natural curing, etc. In the existing printing processes, the use of UV curing technology is becoming increasingly common and is widely applied in offset printing, flexographic printing, screen printing, and gravure printing. The main characteristics of UV printing are as follows: First, the printing material has strong adaptability, especially suitable for printing papers with surfaces that are not easily absorbent to ink, such as composite paper, laser paper, transfer paper, etc. Second, the curing speed of UV printing is fast. It can be cured within 1 / 10 second under the irradiation of a UV lamp, eliminating the need for the long drying tunnel required for infrared drying. Third, after curing, there is no need for powder spraying, which can avoid color differences, environmental pollution, and the impact on employees' health caused by powder spraying. Fourth, the next process can be directly entered after printing without waiting for the ink to dry. Fifth, the ink in the ink trough does not dry and form a crust quickly during the printing process, and there is no need to clean the ink in the ink trough during short-term shutdowns, providing convenience for employees' operations. Sixth, the products printed with UV ink have bright colors and high saturation, demonstrating high printing quality. Seventh, after printing with UV ink and UV varnish in combination, the surface effect is smooth, with good texture, high brightness, and high smoothness. Eighth, UV ink has strong adhesion, safe packaging, and excellent friction and folding resistance. Ninth, it can form special effects such as ice flowers, frosted surfaces, wrinkles, snowflakes, and cold stamping through common ink formulations and curing methods, greatly enhancing the decoration of printed products. Tenth, UV ink is a green environmental protection ink, and the UV curing process is a green environmental protection processing technology. Therefore, its use is becoming more and more widespread at the present stage and is worthy of further promotion.

[0026] At present, in addition to being applied to color printing of inks, curing technology can also produce a variety of special effects through the adjustment of ink formulations and the cooperation of curing methods. For example, in the screen printing snowflake process, the printing of snowflake effects is a popular surface decoration technology for medium- and high-grade printed products at present. The technological characteristics are that the surface of the printed product presents a uniform and fine pattern of small wrinkles and dots, accompanied by a matte effect. The ink layer is flat, with soft luster and good handfeel. The surface of the printed product seems to be covered with a layer of fine snowflakes, hence the name "snowflake" printing, also known as "ice point" printing. The ink in the snowflake printing process is a cured ink, which contains two types of resins, namely blooming resin and curing resin. Although both of these resins are cured resins, there are differences in their curing reaction rates. In actual operation, 30% to 60% of the curing power is required to pre-explode the snowflake ink without complete curing, making the film-forming speed on the ink surface uneven, generating stress and strain, and prompting fine wrinkled patterns to appear on the surface of the ink layer, thus producing the "snowflake" printing effect. After the snowflake-like effect is detonated, secondary complete curing is carried out. At present, this process generally adopts the screen printing method, and the curing efficiency is low.

[0027] Refer to Figure 1 , to solve the above problems, an embodiment of the present application provides a web printing device 10, Figure 1 is a schematic structural diagram of a web printing device 10 according to an embodiment. The web printing device 10 includes an unwinding unit 20, a guide roller assembly 30, a first printing unit 40, a second printing unit 50, a first curing lamp 61, a second curing lamp 62, and a winding unit 70. The unwinding unit 20 is used to place the printing material 100, and the winding unit 70 is used to wind and store the processed printing material 100. The guide roller assembly 30 is used to guide the printing material 100 to move from the unwinding unit 20 to the winding unit 70. The first printing unit 40, the second printing unit 50, the first curing lamp 61, and the second curing lamp 62 are sequentially arranged on the moving path of the printing material 100. The first printing unit 40 and the second printing unit 50 are used to imprint the ink onto the surface of the printing material 100, and the first curing lamp 61 and the second curing lamp 62 are used to cure the ink on the printing material 100 in sequence.

[0028] In the web printing device 10 provided by the present application, the web printing device 10 includes an unwinding unit 20, a guide roller assembly 30, a first printing unit 40, a second printing unit 50, a first curing lamp 61, a second curing lamp 62, and a winding unit 70. The unwinding unit 20 is an important component of the web printing device 10 for placing and conveying the printing material 100 during the printing process. The unwinding unit 20 can place the printing material 100 to ensure the stable supply of the printing material 100 during the printing process. At the same time, the unwinding unit 20 can configure the tension to ensure that the printing material 100 maintains a constant tension during the transmission process, avoiding printing quality problems caused by uneven tension. Some unwinding units 20 also have an alignment function, which can correct the deviation of the printing material 100 during the transmission process and ensure the accuracy of the printing process. The unwinding unit 20 ensures the continuity of the printing process by stably supplying the printing material 100. Improve the printing quality, reduce the errors during the printing process through precise tension control and alignment function, and improve the printing quality. The winding unit 70 is used to wind and store the processed printing material 100. The guide roller assembly 30 is used to control the tension to guide the printing material 100 to move from the unwinding unit 20 to the winding unit 70. The guide roller assembly 30 is used to guide the printing material 100 to move from the unwinding unit 20 to the winding unit 70 and has a guiding effect. The web printing device 10 is applicable to web flexography, gravure printing, or screen printing.

[0029] The first printing unit 40 and the second printing unit 50 are important parts of the web printing device 10, and the first printing unit 40 and the second printing unit 50 can achieve the process of transferring ink onto paper. A printing unit usually consists of a plate cylinder, a blanket cylinder, an impression cylinder, etc. Its working principle is that the graphic part on the plate cylinder obtains ink through the ink supply system, and then contacts the paper under the action of the impression cylinder, thereby transferring the ink onto the paper to form a printed matter. The first curing lamp 61 is used for the first curing, and the second curing lamp 62 is used for the second curing. A curing lamp is a device that uses ultraviolet or infrared rays of a special wavelength to irradiate the coating of a printed matter to rapidly cure it. The working principle of the curing lamp is to emit ultraviolet or infrared rays of a specific wavelength, causing the molecules in the coating to form crosslinks under the action of light, thereby making it harder, more wear-resistant, more chemically resistant, and more lustrous. In the embodiment of the present application, the second curing lamp 62 can move back and forth to adjust the distance between the first curing lamp 61 and the second curing lamp 62, thereby controlling the thickness and the popcorn and wrinkling effects of the UV snowflake ink or the UV wrinkle ink. The first printing unit 40, the second printing unit 50, the first curing lamp 61, and the second curing lamp 62 are sequentially arranged on the moving path of the printing material 100. The first printing unit 40 and the second printing unit 50 are used to imprint the ink onto the surface of the printing material 100, and the first curing lamp 61 and the second curing lamp 62 are used to sequentially cure the ink on the printing material 100. By integrating two printing processes that require treatment with a curing lamp into a complete process, enabling the effects of the two printing processes to be completed at once on the web printing device 10, it is possible to reduce production costs and improve production efficiency.

[0030] In some embodiments, the guide roller assembly 30 includes a first floating roller 32, a second floating roller 33, a first fixed roller 34, and a second fixed roller 35 that abut against the printing material 100. The first floating roller 32, the second floating roller 33, the first fixed roller 34, and the second fixed roller 35 are all guide rollers. The cold stamping contact pressure guide roller 82 is a movable pressure roller that can be combined with the guide roller or separated from it. The second floating roller 33 is a tension roller used for winding tension control. The first floating roller 32 and the first fixed roller 34 are located on the path of the printing material 100 between the unwinding unit 20 and the first printing unit 40. The first floating roller 32 can move relative to the first fixed roller 34 to adjust the tension of the printing material 100. The second floating roller 33 and the second fixed roller 35 are located on the path of the printing material 100 between the second curing lamp 62 and the winding unit 70. The second floating roller 33 can move relative to the second fixed roller 35 to adjust the winding tension of the printing material 100.

[0031] When producing the snowflake effect, the first curing lamp 61 and the second curing lamp 62 are high-power high-pressure mercury lamps. After the second printing unit 50 prints the snowflake ink, it is immediately subjected to blooming irradiation by the first curing lamp 61 at a power of 30% to 60%. Then, the printing material 100 runs to the irradiation area of the second curing lamp 62 for thorough drying. The second curing lamp 62 is generally turned on to 100% power. The faster the machine runs, the higher the power of the first curing lamp 61. The ink layer thickness is not less than 10um. Similarly, for the printing of wrinkle ink, after the first irradiation by the first curing lamp 61, a wrinkle effect is generated on the surface of the ink. Only at this time, the first curing lamp 61 needs to be replaced with a wrinkling lamp, the light source is a UV lamp, the power is between 60W and 100W, and the wavelength is 254nm. And at this time, the wrinkling lamp serves as the first curing lamp 61, and the high-pressure mercury lamp serves as the second curing lamp 62. The distance between the two shall not be less than 1.5m to ensure the wrinkling effect of the wrinkle ink.

[0032] See Figure 1 and Figure 2 , in some embodiments, the position of the second curing lamp 62 can be adjusted to ensure the effects of the wrinkling process and the snowflake process. The web printing device 10 further includes a cold stamping assembly 80. The cold stamping process is a printing technology that realizes the stamping effect at room temperature by using special electroaluminum and UV curable adhesives. The cold stamping process does not require heating, but uses a UV curable adhesive to transfer the electroaluminum foil to the printing material 100. The cold stamping assembly 80 can print and dry UV ink on the printing material 100. Further, on the part of the ink surface that needs to be stamped, a special UV curable adhesive is printed, and the moisture in the adhesive is removed through a UV drying device to form a high-viscosity pressure-sensitive adhesive layer. Further, under the action of a pair of metal rollers, the electroaluminum foil contacts the adhesive, and the electroaluminum foil is firmly bonded to the printing pattern surface by applying pressure, and then the electroaluminum foil is peeled off, thereby completing the stamping process. The cold stamping assembly 80 has the advantages of low cardboard cost, high stamping accuracy and wide application range. There is no need to make expensive metal stamping plates, which can reduce environmental pollution. At the same time, it has a high resolution, is suitable for stamping fine dots and lines, has strong expressiveness, is suitable for large-area graphic stamping, and is applicable to a variety of substrates, including thin film materials that are easily deformed by heat. The cold stamping assembly 80 is movably provided on one side of the path of the printing material 100 between the first curing lamp 61 and the second curing lamp 62. The cold stamping assembly 80 is provided with a cold stamping film. The cold stamping film uses a UV adhesive to transfer the stamping foil to the printing material 100. The whole process does not require the use of a hot template or a hot roller, and the cold stamping film can move with the cold stamping assembly 80 to contact or move away from the surface of the printing material 100.

[0033] In some embodiments, the cold stamping assembly 80 includes a cold stamping driver, a cold stamping unwinding unit 81, a cold stamping pressure guiding roller 82, and a cold stamping winding unit 83. The cold stamping pressure guiding roller 82 functions as a guide. The cold stamping driver is used to drive the cold stamping assembly 80. The cold stamping film can be stored in the cold stamping unwinding unit 81 and moves to the cold stamping winding unit 83 after being guided by rolling of the cold stamping pressure guiding roller 82.

[0034] In some embodiments, the guide roller assembly 30 includes a pressure contact roller 31. The pressure contact roller 31 functions as a guide and can contact the printed material 100 at the same time. The pressure contact roller 31 is located on the path of the printed material 100 between the first curing lamp 61 and the second curing lamp 62 to enable the pressure contact roller 31 to contact the printed material 100 during the movement of the printed material 100. The cold stamping unwinding unit 81, the cold stamping pressure guiding roller 82, and the cold stamping winding unit 83 are arranged on the cold stamping driver and move synchronously under the action of the driver, so that the cold stamping film located on the cold stamping pressure guiding roller 82 abuts against the printed material 100 on the pressure contact roller 31. When performing the cold stamping process operation, the second printing unit 50 prints the hot melt adhesive pattern on the printed object, and then the first curing lamp 61 performs primary drying with a power of 30% to 60%, so that the UV adhesive is not completely dried and remains very sticky. During the cold stamping process, the cold stamping film and the printed object printed with the cold stamping adhesive are pressed together. At this time, due to the very strong viscosity of the initially dried UV adhesive, it is very easy to adhere the transfer layer on the cold stamping film to complete the cold stamping process. And because the cold stamping adhesive has been initially dried, the transfer of the cold stamping film release layer is carried out after the UV adhesive pattern is shaped, making the UV cold stamping effect very clear and having a certain three-dimensional sense, thus greatly improving the cold stamping effect. When the release layer of the cold stamping film is transferred, it enters the second curing lamp 62 for full-power irradiation for thorough drying, and finally completes the operation of the cold stamping process.

[0035] If the cold stamping process effect is to be achieved, the first curing lamp 61 uses a high-pressure mercury lamp or a halogen lamp, and the power is adjusted to 30% to 60% to perform primary curing on the UV adhesive printed by the second printing unit 50 on the printed material 100, so that it is in an incompletely cured state and has very strong viscosity. After being attached to the cold stamping film, the adhesive pattern can be transferred to the transfer layer on the cold stamping film, and then enters the second curing lamp 62 for full-power thorough curing. In some embodiments, the power of the second curing lamp 62 is greater than 3 kW. In other embodiments, the power of the second curing lamp 62 is equal to 3 kW.

[0036] The web printing device 10 further includes a lamp body driving member for driving the second curing lamp 62 to move the position of the second curing lamp 62 according to actual requirements. Specifically, the lamp body driving member is connected to the second curing lamp 62, and the second curing lamp 62 can move along the moving direction of the printing material 100 under the action of the lamp body driving member. In some embodiments, the spacing distance between the first curing lamp 61 and the second curing lamp 62 along the moving path of the printing material 100 is greater than or equal to 1.5 m, and the moving distance of the second curing lamp 62 in the moving direction of the printing material 100 can be within 50 cm on both sides. When the position of the second curing lamp 62 is moved, the snowflake effect or the wrinkle effect can be adjusted.

[0037] When the web printing device 10 needs to achieve a wrinkling effect, the first curing lamp 61 is set as a wrinkling lamp with a power of 60 W to 100 W, and its wavelength can be set to 254 μm. The second curing lamp 62 includes a mercury lamp or a halogen lamp. Under the irradiation of this light source, the UV wrinkling ink of the second printing unit 50 can have a wrinkling reaction, but at this time the ink is not completely dried, so it must be cured again. The second curing lamp 62 cures completely at full power, thereby completing the printing of the wrinkling effect of the web printing device 10.

[0038] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0039] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A web printing device, characterized in that: It includes an unwinding unit, a guide wheel assembly, a first printing unit, a second printing unit, a first curing lamp, a second curing lamp and a rewinding unit, wherein the unwinding unit is used to place the printing material, the rewinding unit is used to curl and store the printing material after processing, and the guide wheel assembly is used to guide the printing material to move from the unwinding unit to the rewinding unit; The first printing unit, the second printing unit, the first curing light and the second curing light are sequentially arranged on a moving path of the printing material; the first printing unit and the second printing unit are used to press ink onto a surface of the printing material; and the first curing light and the second curing light are used to sequentially cure the ink on the printing material.

2. The web printing device according to claim 1, characterized in that: It also includes a cold stamping component, which is movably arranged on one side of the path of the printing material between the first curing lamp and the second curing lamp. The cold stamping component is provided with a cold stamping film, and the cold stamping film can move with the cold stamping component to contact or move away from the surface of the printing material.

3. The web printing device according to claim 2, characterized in that: The cold-ironing assembly comprises a cold-ironing drive, a cold-ironing unwinding unit, a cold-ironing contact-pressure guide wheel and a cold-ironing rewinding unit, wherein the cold-ironing film is received in the cold-ironing unwinding unit and moves to the cold-ironing rewinding unit after being rolled and guided by the cold-ironing contact-pressure guide wheel; the guide wheel assembly comprises a contact-pressure wheel, wherein the contact-pressure wheel is located on the path of the printing material between the first curing lamp and the second curing lamp and contacts the printing material; The cold foil unwinding unit, the cold foil contact pressure guide wheel and the cold foil rewinding unit are arranged on the cold foil driving component, and can move synchronously under the action of the cold foil driving component to make the cold foil film on the cold foil contact pressure guide wheel abut against the printing material on the contact pressure wheel.

4. The web printing apparatus according to claim 2, characterized in that: The power of the second curing lamp is greater than or equal to 3 kW.

5. The web printing apparatus according to claim 1, characterized in that: It also includes a lamp body driving component, which is connected to the second curing lamp and can drive the second curing lamp to move along the moving direction of the printing material.

6. The web printing apparatus according to claim 1, characterized in that: The first curing lamp comprises a wrinkle-inducing lamp, and the second curing lamp comprises a mercury lamp or a halogen lamp.

7. The web printing apparatus according to claim 6, characterized in that: The interval between the first curing light and the second curing light along the moving path of the printing material is greater than or equal to 1.5 m.

8. The web printing apparatus according to claim 6, characterized in that: The power of the wrinkle-inducing lamp is 60W to 100W, and the wavelength is 254 μm.

9. The web printing apparatus according to claim 1, characterized in that: The first curing lamp and the second curing lamp are both mercury lamps or halogen lamps, and the irradiation power of the second curing lamp is greater than that of the first curing lamp.

10. The web printing apparatus according to claim 1, characterized in that: The guide roller assembly includes a first floating roller, a second floating roller, a first fixed roller and a second fixed roller abutting against the printing material, the first floating roller and the first fixed roller are located on the path of the printing material between the unwinding unit and the first printing unit, and the first floating roller can move relative to the first fixed roller to adjust the tension of the printing material; the second floating roller and the second fixed roller are located on the path of the printing material between the second curing lamp and the winding unit, and the second floating roller can move relative to the second fixed roller to adjust the winding tension of the printing material.

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