A green and environmentally friendly printing device

Abstract

This application relates to the technical field of printing equipment, and particularly relates to a green and environment-friendly printing device, which includes a support frame, a box body, a ventilation mechanism and a limiting conveying mechanism. A conveyor belt is arranged on the support frame; the box body is arranged on the support frame, and a through groove for the conveyor belt to pass through is opened at the bottom of the box body. A printing chamber and a drying chamber communicated with the through groove are respectively arranged in the box body. A printing mechanism is arranged in the printing chamber, and a drying mechanism is arranged in the drying chamber; the ventilation mechanism includes a ventilation component and an air outlet roller connected to the ventilation component and arranged in the drying chamber. Air outlet holes are opened on the air outlet roller along the axis direction of the air outlet roller. The air outlet holes are located on the side of the air outlet roller away from the printing chamber and are arranged towards the conveyor belt. The ventilation component is used to promote the flow of gas from the air outlet holes into the drying chamber; the limiting conveying mechanism is arranged in the drying chamber and is used to convey printed products and limit the printed products. This application has the effect of reducing the possibility of harm to human health caused by printed products.

Description

Technical Field

[0001] This application relates to the technical field of printing equipment, and in particular to a green and environment-friendly printing device. Background Art

[0002] Currently, printing is a technology that transfers the original content such as text, pictures, and photos onto the surfaces of materials such as paper, textiles, and leather through processes such as plate making, ink application, and pressure application, and batch replicates the original content. Green printing requires coordination with the environment, including the use of environmentally friendly printing materials, a clean printing production process, the safety of printed products for users, as well as the recycling and recyclability of printed products.

[0003] According to the preliminary sorting reference of the carcinogen list published by the International Agency for Research on Cancer of the World Health Organization, printing ink is in the list of group 3 carcinogens, and the aromatic hydrocarbon substances in the printing ink used are seriously harmful to human health. Moreover, aromatic hydrocarbon substances will volatilize in the air, and if inhaled by the human body, it will cause damage to human health.

[0004] Therefore, there is an urgent need for a green and environment-friendly printing device. Summary of the Invention

[0005] In order to reduce the possibility of harm to human health caused by printed products, this application provides a green and environment-friendly printing device.

[0006] A green and environment-friendly printing device provided by this application adopts the following technical solutions:

[0007] A green and environment-friendly printing device includes:

[0008] A support frame, on which a conveyor belt is provided;

[0009] A box body, which is arranged on the support frame. A through groove is opened at the bottom of the box body, and the conveyor belt passes through the through groove. A printing chamber and a drying chamber communicated with the through groove are respectively arranged in the box body. A printing mechanism is arranged in the printing chamber, and a drying mechanism is arranged in the drying chamber;

[0010] A ventilation mechanism, including a ventilation component and an air outlet roller connected to the ventilation component. The air outlet roller is arranged in the drying chamber. An air outlet is opened along the axis direction of the air outlet roller. The air outlet is located on the side of the air outlet roller away from the printing chamber and faces the conveyor belt. The ventilation component is used to promote the flow of gas from the air outlet into the drying chamber;

[0011] A limiting conveying mechanism, which is arranged in the drying chamber and is used to convey printed products and limit the printed products.

[0012] By adopting the above technical solution, the conveyor belt can convey the printed matter to be printed into the printing chamber for the printing mechanism to print, and the conveyor belt can also convey the printed matter to the drying chamber for the drying mechanism to dry the ink on the printed matter. At this time, the temperature of the printed matter rises, making it easier for aromatic hydrocarbons to volatilize from the ink. When the printed matter is in the drying chamber and is limited by the limiting conveying mechanism, the ventilation component works to drive the air outlet roller to blow air on the printed matter, which is conducive to promoting the volatilization of aromatic hydrocarbons in the ink, and thus conducive to reducing the harmful substances contained in the printed matter, and reducing the possibility of harm to human health to a certain extent.

[0013] Optionally, the limiting conveying mechanism includes a driving member and a first roller set. The first roller set includes a first support roller and a first pressing roller. The first support roller is arranged corresponding to the air outlet roller. The first support roller is attached to the upper conveying surface of the conveyor belt near the lower conveying surface of the conveyor belt. The first pressing roller is coaxially sleeved on the air outlet roller and is rotatably connected to the air outlet roller. The first pressing roller is arranged close to the conveyor belt. The first pressing roller is provided with ventilation grooves, and the ventilation grooves are communicated with the air outlet. The driving member is arranged on the box body, and one end of the first pressing roller is connected to the driving member.

[0014] By adopting the above technical solution, the first pressing roller and the first support roller cooperate with each other to limit the printed matter, so that when the air outlet roller blows air on the printed matter, the position of the printed matter is not easily shifted, and the driving member can drive the first pressing roller to rotate, thereby facilitating the driving of the printed matter to move out of the drying chamber.

[0015] Optionally, the limiting conveying mechanism further includes a second roller set. The second roller set is arranged on the side of the first roller set away from the printing chamber. The second roller set is used for conveying the printed matter passing through the first roller set and limiting the printed matter.

[0016] By adopting the above technical solution, when the printed matter passes through the first roller set, the printed matter will enter the second roller set. At this time, the second roller set can limit the printed matter, so that when the air outlet roller blows air, the position of the printed matter is not easily shifted, and the second roller set will drive the printed matter to move out of the drying chamber.

[0017] Optionally, it further includes a cleaning mechanism. The cleaning mechanism includes a cleaning component and a driving component. The driving component is used for driving the cleaning component to work, and the cleaning component is used for cleaning the first pressing roller.

[0018] By adopting the above technical solution, when the first pressing roller contacts the printed matter, the ink on the printed matter will stain the surface of the first pressing roller. At this time, the cleaning assembly can clean the ink on the first pressing roller, which is beneficial to reducing the excessive ink stained on the first pressing roller, so that when the printed matter passes through the first pressing roller, the ink on the first pressing roller stains the printed matter, resulting in the possibility that the pattern or text on the printed matter is covered.

[0019] Optionally, the driving assembly includes a first gear and a second gear. The first gear is coaxially arranged on the first pressing roller, the second gear is rotatably connected to the inner wall of the drying chamber, the first gear meshes with the second gear, the cleaning assembly includes a reciprocating screw rod and a scraper arranged on the reciprocating screw rod. One end of the reciprocating screw rod is connected to the second gear, the axis of the reciprocating screw rod is arranged parallel to the first pressing roller, and the end of the scraper away from the reciprocating screw rod abuts against the circumferential outer wall of the first pressing roller.

[0020] By adopting the above technical solution, when the first pressing roller rotates, the first pressing roller drives the first gear to rotate, the first gear drives the second gear to rotate, and the second gear drives the reciprocating screw rod to rotate, so that the scraper makes a reciprocating motion on the reciprocating screw rod, which is convenient for scraping the ink on the first pressing roller by using the scraper.

[0021] Optionally, the second gear is located on the side of the first pressing roller away from the first supporting roller. Collection boxes are respectively arranged on both sides of the first pressing roller, and the collection boxes are fixedly connected to the inner wall of the drying chamber. The collection boxes are used to collect the ink scraped off from the first pressing roller.

[0022] By adopting the above technical solution, the collection box can collect the ink scraped off from the first pressing roller by the scraper, which is beneficial to reducing the possibility that the ink falls onto the printed matter and covers the pattern on the printed matter.

[0023] Optionally, the ventilation assembly includes a ventilation duct and an air extraction pump arranged on the ventilation duct. One end of the ventilation duct is communicated with the drying chamber, and the other end of the ventilation duct is communicated with the air outlet roller.

[0024] By adopting the above technical solution, the air extraction pump can drive the gas in the drying chamber to flow among the drying chamber, the ventilation duct and the air outlet roller. On the one hand, it can enable the air outlet roller to blow air on the printed matter, and on the other hand, it can make the gas in the drying chamber flow as much as possible in the drying chamber, reducing the heat loss in the drying chamber to a certain extent, which is beneficial to reducing the energy consumption of the drying mechanism.

[0025] Optionally, a filter is arranged at the end of the ventilation duct away from the air outlet roller, and the filter is used to filter harmful gases.

[0026] By adopting the above technical solution, the filter can filter the harmful gases in the drying chamber, which is beneficial to filtering the aromatic hydrocarbons volatilized from the printed matter, and further beneficial to reducing the content of aromatic hydrocarbons in the gas in the drying chamber.

[0027] Optionally, the drying mechanism includes a plurality of drying lamps, and the plurality of drying lamps are evenly distributed on the inner wall of the drying chamber, and the drying lamps are used for drying the ink on the printed matter.

[0028] By adopting the above technical solution, the plurality of drying lamps cooperate with each other to increase the temperature in the drying chamber, which is convenient for heating the printed matter, and further convenient for volatilizing the aromatic hydrocarbons in the ink on the printed matter, and convenient for drying the ink on the printed matter.

[0029] Optionally, a heat insulation layer is provided on the inner wall of the drying chamber.

[0030] By adopting the above technical solution, the heat insulation layer can reduce the heat loss in the drying chamber, which is beneficial to reducing the energy consumption of the drying mechanism.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. Through the mutual cooperation of the conveyor belt, the printing mechanism, the drying mechanism, the ventilation assembly, the air outlet roller, the first support roller, the first pressing roller and the driving member, after the printed matter enters the drying chamber, it can be heated and blown by the air outlet roller, which is beneficial to promoting the volatilization of the aromatic hydrocarbons in the ink on the printed matter, so as to reduce the harmful substances contained in the ink, and further beneficial to reducing the possibility of harm to human health caused by the printed matter;

[0033] 2. Through the mutual cooperation of the first support roller, the first pressing roller and the second roller group, during the process of the printed matter moving out of the drying chamber, the position of the printed matter is not likely to shift, and the air outlet roller can blow different parts of the printed matter, so that the aromatic hydrocarbons in the ink on the printed matter can volatilize sufficiently, further reducing the possibility of harm to human health caused by the printed matter;

[0034] 3. Through the mutual cooperation of the first pressing roller, the first gear, the second gear, the reciprocating lead screw, the scraper and the collecting box, the ink stained on the first pressing roller can be scraped off, and the scraped ink can enter the collecting box for storage, which is beneficial to reducing the possibility that the ink on the first pressing roller is stained on the printed matter and covering the pattern on the printed matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of the overall structure of a green environmental protection printing device according to an embodiment of the present application.

[0036] Figure 2 is Figure 1 A sectional view taken along line A-A in the middle.

[0037] Figure 3 is Figure 2 An enlarged partial view at position B in the middle.

[0038] Figure 4 It is a schematic structural view of the ventilation mechanism, the limit conveying mechanism, the cleaning mechanism and the collection box in the embodiment of the present application.

[0039] Explanation of reference numerals:

[0040] 1, support frame; 11, conveyor belt; 12, through groove; 13, printing chamber; 14, drying chamber; 2, box body; 3, ventilation mechanism; 31, ventilation component; 311, ventilation duct; 312, air extraction pump; 32, air outlet roller; 321, air outlet; 33, filter; 4, limit conveying mechanism; 41, driving member; 42, first roller group; 421, first supporting roller; 422, first pressing roller; 4221, ventilation groove; 43, second roller group; 5, printing mechanism; 6, drying mechanism; 61, drying lamp; 7, cleaning mechanism; 71, cleaning component; 711, reciprocating lead screw; 712, scraper; 72, driving component; 721, first gear; 722, second gear; 8, collection box. Detailed implementation manners

[0041] The following Figures 1-4 further describes the present application in detail with reference to the attached drawings.

[0042] The embodiment of the present application discloses a green environmental protection printing device.

[0043] Referring to Figure 1 and Figure 2 , the green environmental protection printing device includes a support frame 1, a box body 2, a ventilation mechanism 3 and a limit conveying mechanism 4. Among them, a conveyor belt 11 is arranged on the support frame 1, the box body 2 is fixedly installed on the support frame 1, and a through groove 12 is opened at the bottom of the box body 2, and the conveyor belt 11 is arranged through the through groove 12. A printing chamber 13 and a drying chamber 14 communicated with the through groove 12 are respectively arranged in the box body 2. A printing mechanism 5 for printing the printing material to be printed is arranged in the printing chamber 13, and a drying mechanism 6 for drying the printed matter is arranged in the drying chamber 14; the ventilation mechanism 3 and the limit conveying mechanism 4 are respectively arranged in the drying chamber 14, and the ventilation mechanism 3 is used to promote the flow of the gas in the drying chamber 14, and the limit conveying mechanism 4 is used to convey the printed matter and limit the printed matter, so as to facilitate the drying and ventilation of the printed matter, so that the aromatic hydrocarbon substances in the ink on the printed matter can volatilize, thereby reducing the possibility of harm to human health caused by the printed matter.

[0044] Reference Figure 2 and Figure 3 Figure 1 , the ventilation mechanism 3 (Reference Figure 1 ) includes a ventilation component 31 and an air outlet roller 32 connected to the ventilation component 31. Among them, the air outlet roller 32 is fixedly installed in the drying chamber 14, and the air outlet roller 32 is arranged close to the upper conveying surface of the conveyor belt 11. An air outlet 321 is formed on the air outlet roller 32 along its own axis direction. The air outlet 321 is located on the side of the air outlet roller 32 away from the printing chamber 13 and is arranged facing the conveyor belt 11. The air outlet roller 32 in this embodiment is a hollow cylinder.

[0045] Reference Figure 3 and Figure 4 Figure 2 , the ventilation component 31 includes a ventilation duct 311 and an air extraction pump 312 arranged on the ventilation duct 311. Among them, one end of the ventilation duct 311 is communicated with the drying chamber 14 (Reference Figure 2 ), the other end of the ventilation duct 311 is communicated with the air outlet roller 32. Thus, when the air extraction pump 312 works, the gas in the drying chamber 14 (Reference Figure 2 ) can be pumped into the ventilation duct 311, and the gas can flow from the ventilation duct 311 into the air outlet roller 32, and then flow back into the drying chamber 14 (Reference Figure 2 ) through the air outlet 321.

[0046] Reference Figure 2 and Figure 3 , when the conveyor belt 11 conveys the printed matter into the drying chamber 14 and approaches the air outlet 321, the air outlet roller 32 can blow air on the printed matter, and the blowing direction is towards the direction away from the printing chamber 13 and close to the conveyor belt 11, which is beneficial to accelerating the volatilization speed of aromatic hydrocarbons in the ink on the printed matter.

[0047] Reference Figure 2 and Figure 4 , in this embodiment, the air extraction pump 312 does not directly extract air from the outside into the drying chamber 14, so that the operation of the air extraction pump 312 is not likely to increase the heat exchange between the drying chamber 14 and the outside, reducing the heat loss in the drying chamber 14 to a certain extent, and thus being beneficial to reducing the energy consumption of the drying mechanism 6 in the drying chamber 14.

[0048] The air extraction pump 312 in this embodiment is located outside the box body 2, so that the air extraction pump 312 is not easily affected by the drying mechanism 6 and the temperature rises, and thus is beneficial to reducing the possibility of damage to the air extraction pump 312 due to overheating.

[0049] One end of the ventilation duct 311 far away from the air outlet roller 32 is fixedly connected with a filter 33. In this embodiment, the filter 33 is an activated carbon filter 33. Thus, when the gas in the drying chamber 14 enters the ventilation duct 311, harmful substances carried in the gas, such as aromatic hydrocarbons, can be adsorbed by the activated carbon, which is beneficial to reducing the content of harmful substances in the gas in the drying chamber 14.

[0050] Referring to Figure 2 and Figure 4 , the limiting conveying mechanism 4 includes a driving member 41, a first roller group 42 and a second roller group 43. Among them, the first roller group 42 includes a first support roller 421 and a first pressing roller 422. The first support roller 421 is located between the upper conveying surface and the lower conveying surface of the conveyor belt 11 and is rotatably installed on the inner wall of the drying chamber 14, and the first support roller 421 is attached to the side of the upper conveying surface of the conveyor belt 11 close to the lower conveying surface of the conveyor belt 11. In this embodiment, the position of the first support roller 421 corresponds to that of the air outlet roller 32 (referring to Figure 3 ).

[0051] Referring to Figure 2 and Figure 3 , the first pressing roller 422 is coaxially sleeved on the air outlet roller 32 and is rotatably connected to the air outlet roller 32, and the first pressing roller 422 is rotatably installed on the inner wall of the drying chamber 14 and is arranged close to the conveyor belt 11. A plurality of ventilation grooves 4221 are formed in the first pressing roller 422. The plurality of ventilation grooves 4221 are evenly distributed around the axis of the first pressing roller 422 on the first pressing roller 422, and the ventilation grooves 4221 can communicate with the air outlet 321, so that the first pressing roller 422 is not likely to obstruct the air outlet roller 32 from blowing air into the drying chamber 14 through the air outlet 321.

[0052] Referring to Figure 4 , the driving member 41 is fixedly installed on the outside of the box body 2 and is arranged close to the conveyor belt 11. One end of the first pressing roller 422 is connected to the driving member 41, so that the driving member 41 can rotate the first pressing roller 422 around its own axis. In this embodiment, the driving member 41 is a driving motor.

[0053] Referring to Figure 2 and Figure 3 , when the printed matter enters the drying chamber 14 and is conveyed by the conveyor belt 11 to between the first pressing roller 422 and the conveyor belt 11, the first support roller 421 can support the printed matter through the conveyor belt 11, so as to facilitate clamping the printed matter between the conveyor belt 11 and the first pressing roller 422. And when the first pressing roller 422 rotates, it can drive the printed matter to move in a direction away from the printing chamber 13. Thus, through the mutual cooperation of the first pressing roller 422, the conveyor belt 11 and the first support roller 421, the purpose of limiting the printed matter is achieved, and the purpose of driving the printed matter to move is also achieved.

[0054] Reference Figure 4 Figure 4 , when the air extraction pump 312 is working and the printed matter is located between the first pressing roller 422 and the first supporting roller 421, the gas can impact the surface of the printed matter through the ventilation groove 4221. At this time, the printed matter is affected by the first pressing roller 422 and the first supporting roller 421, making it difficult for the printed matter to be blown, so as to facilitate keeping the position of the printed matter relatively fixed.

[0055] Reference Figure 2 Figure 2 , the second roller group 43 is rotatably installed on the inner wall of the drying chamber 14, and the second roller group 43 is located on the side of the first roller group 42 away from the printing chamber 13. The second roller group 43 is arranged at an interval from the first roller group 42. In this embodiment, when the printed matter passes through the first roller group 42 and is about to leave the first roller group 42, the end of the printed matter away from the printing chamber 13 can enter the second roller group 43, so as to facilitate the second roller group 43 to limit the printed matter, and the second roller group 43 can drive the printed matter to move in a direction away from the first roller group 42.

[0056] Reference Figure 2 and Figure 3 Figure 3 , when the printed matter is paper, after the printed matter passes through the first roller group 42 and enters the second roller group 43, the gas flowing out of the air outlet roller 32 can sequentially pass through the air outlet 321 and the ventilation groove 4221 and blow to the end of the printed matter close to the printing chamber 13, so that the end of the printed matter close to the printing chamber 13 shakes on the conveyor belt 11, so that the aromatic hydrocarbon substances in the ink on the printed matter can volatilize more thoroughly. At this time, the second roller group 43 limits the printed matter, so that the position of the printed matter is not easily offset, so as to facilitate the collection of the printed matter leaving the drying chamber 14.

[0057] Reference Figure 2 and Figure 4 Figure 4 , the green environmental protection printing device includes a cleaning mechanism 7, and the cleaning mechanism 7 includes a cleaning component 71 and a driving component 72. Among them, the cleaning component 71 and the driving component 72 are respectively arranged in the drying chamber 14.

[0058] The driving component 72 includes a first gear 721 and a second gear 722. The first gear 721 is coaxially arranged on the first pressing roller 422, and the first gear 721 is arranged close to the inner wall of the drying chamber 14. The second gear 722 is rotatably connected to the inner wall of the drying chamber 14, and the second gear 722 is located on the side of the first gear 721 away from the conveyor belt 11. The first gear 721 is engaged with the second gear 722, so that the first gear 721 can drive the second gear 722 to rotate.

[0059] The cleaning component 71 includes a reciprocating screw rod 711 and a scraper 712. Among them, the scraper 712 is threadedly connected to the reciprocating screw rod 711. One end of the reciprocating screw rod 711 is fixedly connected to the second gear 722, and the other end of the reciprocating screw rod 711 is rotatably connected to the inner wall of the drying chamber 14.

[0060] The axis of the reciprocating screw rod 711 is arranged parallel to the first pressure roller 422. One end of the scraper 712 away from the reciprocating screw rod 711 abuts against the outer circumferential wall of the first pressure roller 422. Thus, when the reciprocating screw rod 711 rotates, the scraper 712 can perform a reciprocating motion along the axis of the reciprocating screw rod 711, thereby facilitating the cleaning of the outer circumferential wall of the first pressure roller 422 by the scraper 712.

[0061] When the first pressure roller 422 contacts the printed matter, the ink on the printed matter will stain the surface of the first pressure roller 422. And when the first pressure roller 422 rotates, the first pressure roller 422 drives the first gear 721 to rotate, the first gear 721 drives the second gear 722 to rotate, and the second gear 722 drives the reciprocating screw rod to rotate, so that the scraper 712 performs a reciprocating motion on the reciprocating screw rod 711 to scrape the ink on the first pressure roller 422, thereby being beneficial to reducing the excessive ink stained on the first pressure roller 422, so that when the printed matter passes through the first pressure roller 422, the ink on the first pressure roller 422 stains the printed matter, resulting in the possibility that the pattern or text on the printed matter is covered.

[0062] Collection boxes 8 are respectively arranged on both sides of the first pressure roller 422. The collection boxes 8 are fixedly connected to the inner wall of the drying chamber 14, and the collection boxes 8 are arranged along the axis direction of the first pressure roller 422. The collection boxes 8 can collect the ink scraped from the first pressure roller 422 by the scraper 712, thereby being beneficial to reducing the possibility that the ink falls onto the printed matter and covers the pattern on the printed matter.

[0063] Refer to Figure 2 , the drying mechanism 6 includes a plurality of drying lamps 61, and the plurality of drying lamps 61 are evenly distributed on the inner wall of the drying chamber 14. The drying lamp 61 in this embodiment is an ultraviolet drying lamp 61, thereby facilitating heating the printed matter to dry the ink on the printed matter, and helping to volatilize the aromatic hydrocarbon substances in the ink on the printed matter.

[0064] A heat insulation layer is further arranged on the inner wall of the drying chamber 14, so as to reduce the heat loss in the drying chamber 14, thereby being beneficial to reducing the overall energy consumption of the device.

[0065] The implementation principle of a green and environmental protection printing device in this application embodiment is as follows: When the conveyor belt 11 conveys the printed matter to be printed into the printing chamber 13, the printing mechanism 5 can print the printed matter to be printed. Then, the conveyor belt 11 conveys the printed matter after printing into the drying chamber 14 for drying.

[0066] After the printed matter enters the drying chamber 14, the air extraction pump 312 operates to extract the gas in the drying chamber 14 into the ventilation duct 311, so that the gas enters the air outlet roller 32 through the ventilation duct 311, and then is sprayed out successively through the air outlet 321 and the ventilation groove 4221. At this time, the first pressing roller 422 rotates, limits the printed matter while driving the printed matter to move away from the printing chamber 13, so that the gas sprayed out of the ventilation groove 4221 can be sprayed onto the printed matter, and at the same time the drying lamp 61 dries the printed matter to promote the volatilization of aromatic hydrocarbon substances in the ink.

[0067] At the same time, the first pressing roller 422 drives the first gear 721 to rotate, the first gear 721 drives the second gear 722 to rotate, and the second gear 722 drives the reciprocating lead screw 711 to rotate, so as to drive the scraper 712 to make a reciprocating motion on the reciprocating lead screw 711, so that the scraper 712 scrapes off the ink stained on the first pressing roller 422.

[0068] And when the printed matter enters the second roller group 43, the second roller group 43 can limit the printed matter and drive the printed matter to move away from the first roller group 42, so that the printed matter moves to a position of the second roller group 43 far from the first roller group 42. At this time, the gas sprayed out of the ventilation groove 4221 no longer acts on the printed matter, so that the conveyor belt 11 can convey the printed matter out of the drying chamber 14, thereby facilitating the collection of the printed matter to complete the printing work of the printed matter.

[0069] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A green and environment-friendly printing device, characterized in that, Comprising: A support frame (1), on which a conveyor belt (11) is arranged; A box body (2), arranged on the support frame (1), a through groove (12) is formed at the bottom of the box body (2), the conveyor belt (11) is arranged through the through groove (12), a printing chamber (13) and a drying chamber (14) communicated with the through groove (12) are respectively arranged in the box body (2), a printing mechanism (5) is arranged in the printing chamber (13), and a drying mechanism (6) is arranged in the drying chamber (14); A ventilation mechanism (3), comprising a ventilation component (31) and an air outlet roller (32) connected to the ventilation component (31), the air outlet roller (32) is arranged in the drying chamber (14), an air outlet (321) is formed in the air outlet roller (32) along its own axis direction, the air outlet (321) is located on the side of the air outlet roller (32) away from the printing chamber (13) and is arranged towards the conveyor belt (11), and the ventilation component (31) is used to promote the flow of gas from the air outlet (321) into the drying chamber (14); A limit conveying mechanism (4), arranged in the drying chamber (14), and the limit conveying mechanism (4) is used to convey printed products and limit the printed products; The limit conveying mechanism (4) comprises a driving member (41) and a first roller group (42), the first roller group (42) comprises a first support roller (421) and a first pressing roller (422), the first support roller (421) is arranged corresponding to the air outlet roller (32), the first support roller (421) is attached to the upper conveying surface of the conveyor belt (11) close to the lower conveying surface of the conveyor belt (11), the first pressing roller (422) is coaxially sleeved on the air outlet roller (32) and is rotatably connected to the air outlet roller (32), the first pressing roller (422) is arranged close to the conveyor belt (11), a ventilation groove (4221) is formed in the first pressing roller (422), the ventilation groove (4221) is communicated with the air outlet (321), the driving member (41) is arranged on the box body (2), and one end of the first pressing roller (422) is connected to the driving member (41).

2. The green environmental protection printing device according to claim 1, wherein: The limit conveying mechanism (4) further comprises a second roller group (43), the second roller group (43) is arranged on the side of the first roller group (42) away from the printing chamber (13), and the second roller group (43) is used to convey the printed products passing through the first roller group (42) and limit the printed products.

3. The green environmental protection printing device according to claim 1, characterized in that: It further comprises a cleaning mechanism (7), the cleaning mechanism (7) comprises a cleaning component (71) and a driving component (72), the driving component (72) is used to drive the cleaning component (71) to work, and the cleaning component (71) is used to clean the first pressing roller (422).

4. The green environmental protection printing device according to claim 3, wherein: The driving component (72) includes a first gear (721) and a second gear (722). The first gear (721) is coaxially arranged on the first pressing roller (422). The second gear (722) is rotatably connected to the inner wall of the drying chamber (14). The first gear (721) meshes with the second gear (722). The cleaning component (71) includes a reciprocating lead screw (711) and a scraping plate (712) arranged on the reciprocating lead screw (711). One end of the reciprocating lead screw (711) is connected to the second gear (722). The axis of the reciprocating lead screw (711) is arranged parallel to the first pressing roller (422). The end of the scraping plate (712) away from the reciprocating lead screw (711) abuts against the outer circumferential wall of the first pressing roller (422).

5. The green environmental protection printing device according to claim 4, characterized in that: The second gear (722) is located on the side of the first pressing roller (422) away from the first supporting roller (421). Collection boxes (8) are respectively arranged on both sides of the first pressing roller (422). The collection boxes (8) are fixedly connected to the inner wall of the drying chamber (14). The collection boxes (8) are used to collect the ink scraped off from the first pressing roller (422).

6. The green environmental protection printing device according to claim 1, characterized in that: The ventilation component (31) includes a ventilation duct (311) and an air extraction pump (312) arranged on the ventilation duct (311). One end of the ventilation duct (311) is communicated with the drying chamber (14). The other end of the ventilation duct (311) is communicated with the air outlet roller (32).

7. The green environmental protection printing device according to claim 6, characterized in that: A filter (33) is arranged at the end of the ventilation duct (311) away from the air outlet roller (32). The filter (33) is used to filter harmful gases.

8. The green environmental protection printing device according to claim 1, wherein: The drying mechanism (6) includes a plurality of drying lamps (61). The plurality of drying lamps (61) are evenly distributed on the inner wall of the drying chamber (14). The drying lamps (61) are used to dry the ink on the printed matter.

9. The green environmental protection printing device according to claim 1, characterized in that: A heat preservation layer is arranged on the inner wall of the drying chamber (14).

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