Paperboard printing apparatus and paperboard printing method

Abstract

The application relates to a paperboard printing device and a paperboard printing method, and is applied to the field of packaging box production, wherein the paperboard printing device comprises a transfer conveying device (1) and a drying device (2); the transfer conveying device comprises a transfer conveying belt (11) and a plurality of partition members (12) arranged on the transfer conveying belt; the partition members are arranged at equal intervals, and two adjacent partition members and the transfer conveying belt form a containing cavity capable of containing paperboards; the drying device comprises an oven (21) and a drying conveying belt (22) capable of passing through the oven; a plurality of paperboard supporting assemblies (221) are arranged on the drying conveying belt in an inclined mode; after the paperboard is transferred out from the transfer conveying belt, the paperboard can slide between two adjacent paperboard supporting assemblies; one side of the paperboard without ink spraying is in contact with one of the two paperboard supporting assemblies, and the side of the paperboard with ink spraying is not in contact with the other of the two paperboard supporting assemblies. The application has the effect of high drying efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of packaging box production, and particularly relates to a paperboard printing device, and further relates to a paperboard printing method. BACKGROUND

[0002] A packaging box is a box used for packaging products. Generally, the packaging box is marked with the name and use of the product packaged therein, or matters needing attention of the product during transportation, and even an advertisement is printed on the packaging box for publicity.

[0003] Therefore, during the production of the packaging box, the required picture or text content needs to be printed or pasted. For the paper packaging box, a direct printing form is generally adopted, and the paperboard needs to be dried after printing to quickly dry the ink, thereby improving the production efficiency and reducing the occurrence of the blurred pattern of the paperboard due to the undried ink during storage.

[0004] In the prior art, when the printed paperboard is dried, the paperboard is generally laid flat on the conveying belt of the drying device, so that the number of paperboards simultaneously in the oven is small, and the drying efficiency is low. Or, before drying, the paperboard is stacked up and down in the stacking device, and then the paperboard and the stacking device are sent into the oven for drying. In this method, the paperboard consumes a lot of time during stacking, which affects the drying efficiency.

[0005] Therefore, it is necessary to provide a paperboard printing device. CONTENT OF THE INVENTION

[0006] In order to improve the above-mentioned defects, the present application provides a paperboard printing device and a paperboard printing method.

[0007] The paperboard printing device provided in the first aspect of the present application adopts the following technical scheme.

[0008] A paperboard printing device comprises a transfer conveying device and a drying device. The transfer conveying device comprises a transfer conveying belt and a plurality of partition members arranged on the transfer conveying belt. The partition members are arranged at equal intervals, and adjacent two partition members and the transfer conveying belt form a containing cavity capable of containing paperboard. The drying device comprises an oven and a drying conveying belt capable of passing through the oven. A plurality of paperboard supporting assemblies are arranged on the drying conveying belt in an inclined manner. After the paperboard is transferred out of the transfer conveying belt, the paperboard can slide between adjacent two paperboard supporting assemblies. One side of the paperboard on which ink is not sprayed is in contact with one of the two paperboard supporting assemblies, and the other side of the paperboard on which ink is sprayed is not in contact with the other of the two paperboard supporting assemblies.

[0009] By adopting the above technical scheme, the partition piece and the conveying belt form a containing cavity capable of containing the paperboard, so that the speed of the transfer conveying equipment provided with the partition piece conveying the paperboard can be ensured, that is, one paperboard is conveyed per unit time, thereby facilitating the control of the conveying rhythm of the paperboard, so as to facilitate the matching with the conveying speed of the subsequent drying conveying belt, thereby facilitating the guarantee that each paperboard output from the transfer conveying equipment can fall on the two paperboard supporting assemblies to ensure the reliability of the conveying; and each paperboard supporting assembly is inclinedly arranged on the drying conveying belt, so that the paperboard is also inclinedly arranged on the drying conveying belt when being conveyed onto the drying conveying belt, thereby enabling more paperboards to be placed in a unit interval on the drying conveying belt, and the paperboard is directly conveyed onto the drying conveying belt, so that the stacking of the paperboard can be directly realized by the paperboard supporting assembly when reaching the conveying belt, thereby saving time and enabling more paperboards to be simultaneously contained in the oven, thereby improving the drying efficiency.

[0010] Specifically, the transfer conveying belt comprises an outer layer and an inner layer, the partition piece is a long strip structure with a semicircular cross section, and the partition piece is arranged between the outer layer and the inner layer and penetrates the width direction of the transfer conveying belt.

[0011] By adopting the above technical scheme, the partition piece is arranged as a long strip structure with a semicircular cross section, so that when the partition piece moves to the output end of the transfer conveying belt and gradually rotates downward, it can tend to be tangent to the upper plane of the transfer conveying belt, so that the partition piece has small resistance to the paperboard at this time, and the paperboard can be conveniently caused to slide between the two paperboard supporting assemblies.

[0012] Further, the conveying direction of the transfer conveying belt is inclined to the horizontal direction, and the output end of the transfer conveying belt is connected to the drying conveying belt.

[0013] By adopting the above technical scheme, the paperboard can be conveniently caused to slide between the two paperboard supporting assemblies.

[0014] Specifically, the drying conveying belt comprises a track unit, the track unit comprises a plurality of track plates, and each track plate is provided with the paperboard supporting assembly.

[0015] By adopting the above technical scheme, the receiving capacity of the drying conveying belt for the paperboard supporting assembly can be ensured.

[0016] Specifically, the paperboard supporting assembly comprises a supporting base and a paperboard supporting plate, the supporting base is formed with a V-shaped groove penetrating the length direction of the supporting base, the bottom of the V-shaped groove is provided with a hinge shaft sleeve, and the paperboard supporting plate is hinged to the supporting base.

[0017] By adopting the technical scheme, the two groove surfaces of the V-shaped groove can form support for the paperboard support plate and the paperboard, and when the paperboard support assembly moves to the output end of the drying conveying belt and moves downward, the paperboard support plate can rotate from one groove surface of the V-shaped groove to abut against the other groove surface and strike, thereby facilitating the paperboard to be knocked out.

[0018] Further, the paperboard support plate comprises a support framework, a plurality of auxiliary support bars, a limiting block arranged on the support framework, and a framework shaft sleeve arranged on the lower frame of the support framework. The support framework is a rectangular frame structure, and one end of each auxiliary support bar is connected to the upper frame of the support framework, and the other end is connected to the lower frame of the support framework.

[0019] By adopting the technical scheme, the extension direction of the auxiliary support bar is consistent with the sliding direction of the paperboard, thereby facilitating the paperboard to slide downward, and enabling the paperboard support plate to adapt to paperboards of different sizes.

[0020] Further, the V-shaped groove comprises a first abutting surface and a second abutting surface, the support framework can abut against the first abutting surface or the second abutting surface, and the limiting block is arranged on the side of the support framework abutting against the second abutting surface, and the limiting block comprises a limiting surface perpendicular to the support framework.

[0021] By adopting the technical scheme, the limiting surface on the limiting block can abut against the paperboard, thereby ensuring that the paperboard will not fall to the bottom of the V-shaped groove, and facilitating the subsequent conveying of the paperboard from the drying conveying belt.

[0022] Further, the drying oven comprises an oven body, a blowing unit, and a heating unit. The inside of the oven body forms a drying cavity, and the heating unit is arranged on the inner wall of the drying cavity located on both sides of the drying conveying belt. The blowing unit is arranged on the upper part of the oven body.

[0023] By adopting the technical scheme, the blowing unit is arranged on the upper part of the oven body, facilitating the upward hot air to be blown downward to the paperboard, accelerating the drying of the ink, and forming a good air circulation in the oven.

[0024] Further, the blowing unit comprises a blower arranged on the outside of the oven body and a blowing duct arranged on the inside of the oven body, and a plurality of air outlet grooves are arranged on the side of the blowing duct facing the drying conveying belt along the length direction of the blowing duct.

[0025] By adopting the technical scheme, the blown air flow can be more uniform, and the air flow speed is relatively slow, which is not easy to blow the paperboard, thereby avoiding the situation that the paperboard falls into the oven.

[0026] The paperboard printing method provided in the second aspect of the application adopts the following technical scheme.

[0027] A paperboard printing method, comprising the following steps:

[0028] S1: configuring ink of a set color and adding it to a corresponding printing machine;

[0029] S2: printing, feeding paperboard into the printing machine and printing the paperboard in sequence to obtain a required printing pattern;

[0030] S3: transferring and drying, transferring the paperboard on the transfer conveying device to the drying device to dry the paperboard.

[0031] By adopting the above technical scheme, the drying efficiency of the drying device is higher, and the degree of automation in the printing process is high.

[0032] In summary, the application has at least one of the following beneficial technical effects:

[0033] 1. The partition member and the conveying belt form a containing cavity capable of containing paperboard, so that the speed of the transfer conveying device provided with the partition member transporting paperboard can be ensured, that is, one paperboard is transported per unit of time, thereby facilitating the control of the transportation rhythm of the paperboard to match the conveying speed of the subsequent drying conveying belt, thereby ensuring that each paperboard output from the transfer conveying device falls on two paperboard supporting assemblies to ensure the reliability of the conveying.

[0034] 2. Each paperboard supporting assembly is inclinedly arranged on the drying conveying belt, so that the paperboard is also inclinedly arranged on the drying conveying belt when conveyed onto the drying conveying belt, thereby enabling more paperboards to be placed in a unit interval on the drying conveying belt, and the paperboards are directly conveyed onto the drying conveying belt and can be directly stacked by the paperboard supporting assemblies when reaching the conveying belt, thereby saving time and enabling more paperboards to be simultaneously contained in the drying oven, thereby improving the drying efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a perspective structural schematic view of the paperboard printing device of the application (part of the paperboard supporting assembly is omitted).

[0036] Figure 2 is a top view of the transfer conveying device in the paperboard printing device of the application.

[0037] Figure 3 is Figure 2Figure 6 is a sectional view along the B-B direction of the transfer conveyor in Figure 5.

[0038] Figure 4 Figure 7 is a top view of a drying device in the paperboard printing apparatus of the present application.

[0039] Figure 5 Figure 8 is a sectional view along the C-C direction of Figure 7. Figure 4

[0040] Figure 9 is a sectional view along the A-A direction of Figure 7. Figure 6 Figure 1 Figure 10 is an enlarged view of the A region in Figure 9.

[0041] Figure 7 Figure 11 is an enlarged view of the E region in Figure 9. Figure 5

[0042] Figure 12 is a schematic view of the structure of a paperboard support plate in the paperboard printing apparatus of the present application. Figure 8

[0043] Figure 13 is a sectional view along the D-D direction of Figure 12. Figure 9 Figure 5 Figure 14 is a sectional view along the E-E direction of Figure 12.

[0044] Reference numerals: 1, transfer conveying device; 11, transfer conveyor; 12, partition member; 2, drying device; 21, drying oven; 211, oven body; 212, air blowing unit; 2121, air blower; 2122, air blowing duct; 21221, air outlet slot; 213, heating unit; 22, drying conveyor; 23, paperboard support assembly; 231, support base; 2311, V-shaped groove; 2312, hinged shaft sleeve; 232, paperboard support plate; 2321, support framework; 2322, auxiliary support strip; 2323, limiting block; 23231, limiting surface; 2324, framework shaft sleeve. DETAILED DESCRIPTION

[0045] The following will be described in detail below with reference to the accompanying drawings. Figures 1-9 The present application will be described in further detail.

[0046] The present application discloses a paperboard printing apparatus.

[0047] Reference will be made to Figure 1 ​​, a cardboard printing device, which includes: a transfer conveyor device 1 and a drying device 2; wherein the transfer conveyor device 1 includes a transfer conveyor belt 11 and a plurality of partition members 12 arranged on the transfer conveyor belt, and each partition member 12 is arranged at equal intervals, so that two adjacent partition members 12 are combined with the transfer conveyor belt to form a receiving cavity that can accommodate cardboard. When the cardboard is transferred by the transfer conveyor device 1, only one cardboard should be placed in each receiving cavity, so that when the transfer conveyor device 1 runs for one unit time (and the transfer conveyor belt 11 transmits one unit distance), only one cardboard can be transmitted, so that the transmission rhythm of the cardboard can be easily controlled to match the transmission speed of the subsequent drying conveyor belt 22; the drying device 2 includes an oven 2 1 and a drying conveyor belt 22 capable of passing through the drying oven 21, wherein the drying conveyor belt 22 is provided with a plurality of inclined cardboard support assemblies 23; after being transferred from the transfer conveyor belt 11, the cardboard can slide between two adjacent cardboard support assemblies 23, and the side of the cardboard that is not sprayed with ink contacts one of the two cardboard support assemblies 23, and the side of the cardboard that is sprayed with ink does not contact the other of the two cardboard support assemblies 23. That is, a sufficient gap is left between the two cardboard support assemblies 23 to prevent the ink-coated side of the cardboard from scratching the cardboard support assemblies 23 and causing blurred patterns. In addition, more cardboard can be placed within a unit spacing on the drying conveyor belt 22, thereby improving the drying efficiency of the drying oven 21.

[0048] Specifically, refer to Figure 2 and Figure 3 In one embodiment of the cardboard printing device of the present application, the transfer conveyor 11 can be set as a belt conveyor, and the belt can be set to include an outer layer and an inner layer, the partition member 12 can be a long strip structure with a semicircular cross-section, and the partition member 12 is arranged between the outer layer and the inner layer, and the inner layer and the outer layer and the partition member 12 can be bonded by glue to limit the partition member 12 to a set position, and the partition space can be set to run through the width direction of the transfer conveyor 11; the partition member 12 is arranged between the inner layer and the outer layer of the transfer conveyor 11, so that the integral structure formed by the partition member 12 and the belt conveyor is more integrated. Compared with directly installing the partition member 12 on the outer surface of the belt conveyor, arranging the partition member 12 between the inner and outer layers of the belt conveyor can make the partition member 12 not easy to fall off the belt conveyor, and there will be no gap between the connection between the partition member 12 and the outer surface of the belt conveyor, which causes some thinner cardboards to be stuck in the gap and unable to be sent out by the belt conveyor.

[0049] The partition member 12 is arranged as a long strip structure with a semicircular cross section, so that when the partition member 12 is moved to the output end of the transfer conveyor 11 and gradually turned downward, it can tend to be tangent to the upper plane of the transfer conveyor 11, so that the partition member 12 at this time has small resistance to the paperboard, thereby facilitating the paperboard to slide between the two paperboard support assemblies 23; in addition, as shown in Figure 1 Since the paperboard support assembly 23 is arranged obliquely, in order to facilitate the paperboard to slide between the two paperboard support assemblies 23, the transfer conveyor 11 can also be arranged obliquely, specifically, the transfer conveyor 11 is arranged such that its conveying direction is inclined to the horizontal direction, for example, at an angle of 30° with the horizontal plane, and the output end of the transfer conveyor 11 can be connected with the upper part of the paperboard support assembly 23 on the drying conveyor 22, so that the paperboard can slide between the two paperboard support assemblies 23.

[0050] Further, referring to Figure 4 and Figure 5 In an embodiment of the paperboard printing apparatus of the present application, the drying conveyor 22 comprises a track unit, the track unit comprises a plurality of track plates, and each track plate is provided with a paperboard support assembly 23; the drying conveyor 22 is arranged as a track conveyor, so that the drying conveyor 22 has higher strength and can bear the weight of the paperboard support assembly 23, and can be conveniently connected with the paperboard support assembly 23, in addition, the paperboard support assembly 23 is arranged on each track plate, so that the drying conveyor 22 can be provided with more paperboard support assemblies 23, and the density is higher, thereby improving the drying efficiency.

[0051] Specifically, referring to Figure 5 and Figure 6 In an embodiment of the paperboard printing apparatus of the present application, the paperboard support assembly 23 comprises a support base 231 and a paperboard support plate 232, wherein the support base 231 can be screwed with the track plate, and a V-shaped groove 2311 penetrating the length direction of the support base 231 is formed on the support base 231, and a hinge shaft sleeve 2312 is arranged at the bottom of the V-shaped groove 2311, in addition, as shown in Figure 7 A receiving platform is further arranged on both sides of the V-shaped groove 2311; as shown in Figure 8As shown, the paperboard supporting plate 232 is provided to include a supporting framework 2321, a plurality of auxiliary supporting strips 2322, a limiting block 2323 arranged on the supporting framework 2321, and a framework shaft sleeve 2324 arranged on the lower edge of the supporting framework 2321, so that the paperboard supporting plate 232 and the supporting base 231 can be hingedly connected through the cooperation of the framework shaft sleeve 2324, the hinged shaft sleeve 2312 and the hinged shaft; the supporting framework 2321 can be provided as a rectangular frame structure made of thicker steel strips (such as steel strips with a diameter of 4 mm), and if the size of the supporting framework 2321 is larger, a few thicker steel strips can be arranged between the upper edge and the lower edge of the supporting framework 2321 as supports to improve the structural strength of the supporting framework 2321, and each auxiliary supporting strip 2322 is a thin metal wire to support the paperboard, and each auxiliary supporting strip 2322 is connected at one end to the upper edge of the supporting framework 2321 and at the other end to the lower edge of the supporting framework 2321, so that the extension direction of the auxiliary supporting strip 2322 is consistent with the sliding direction of the paperboard, thereby facilitating the downward sliding of the paperboard.

[0052] Based on the design of the V-shaped groove 2311, both groove surfaces, i.e. the first abutting surface and the second abutting surface, can be used to abut against the supporting framework 2321 on the paperboard supporting plate 232 to maintain a fixed inclined posture, for example, the first abutting surface and the second abutting surface can be arranged as follows: when the paperboard supporting plate 232 abuts on the first abutting surface, the paperboard supporting plate 232 is inclined from bottom to top to the direction opposite to the conveying direction of the drying conveying belt 22, and the included angle with the horizontal plane is 45°, and when the paperboard supporting plate 232 abuts on the first abutting surface, the paperboard supporting plate 232 is inclined from bottom to top to the conveying direction of the drying conveying belt 22, and the included angle with the horizontal plane is 45°; the above design makes the paperboard supporting plate 232 in the paperboard supporting assembly 23 automatically abut on the first abutting surface when the paperboard supporting assembly 23 rotates from the lower part of the drying conveying belt 22 to the upper part of the drying conveying belt 22, at this time, the inclination angle is relatively small compared with the inclination angle of the transfer conveying belt 11, facilitating the paperboard to slide onto the paperboard supporting plate 232; as shown, Figure 7 As shown, during the process of the paperboard supporting assembly 23 rotating from the upper part of the drying conveying belt 22 to the lower part of the drying conveying belt 22, the paperboard supporting plate 232 in the paperboard supporting assembly 23 will automatically abut on the second abutting surface, at this time, the paperboard supporting plate 232 will strike the second abutting surface, so that the paperboard can be knocked out through the striking.

[0053] As shown, Figure 7As shown, the above-mentioned limit block 2323 should be set on the side of the support frame 2321 that abuts the second abutting surface, and the limit block 2323 includes a limit surface 23231 perpendicular to the support frame 2321, and a platform abutting surface that can abut the receiving platform at the upper edge of the second abutting surface in the above-mentioned scheme, so that the limit surface 23231 can abut against the cardboard to ensure that the cardboard will not fall to the bottom of the V-shaped groove 2311, so as to facilitate the conveying of the cardboard from the drying conveyor belt 22, and can also play an auxiliary supporting role for the cardboard support plate 232 through the abutment between the platform abutting surface and the receiving platform.

[0054] Further, refer to Figure 5 and Figure 9 In one embodiment of the cardboard printing device of the present application, the oven 21 includes a box body 211, a blast unit 212 and a heating unit 213; wherein a drying cavity is formed inside the box body 211, and the heating unit 213 can be a resistance wire and is arranged on the inner wall of the drying cavity on both sides of the drying conveyor belt 22; the blast unit 212 is arranged at the upper part of the box body 211, and specifically includes a blower 2121 arranged outside the box body 211 and a blast duct 2122 arranged inside the box body 211, and as shown Figure 9 As shown, a plurality of air outlet slots 21221 are arranged on the side of the blast duct 2122 facing the drying conveyor belt 22 along the length direction of the blast duct 2122, so that the blown air flow can be more uniform and the air flow speed is relatively slow, which is not easy to blow the cardboard, and thus it is not easy for the cardboard to fall into the drying oven 21; in addition, based on the structural design of the above-mentioned cardboard support plate 232 and the 45° inclined design, the air flow blowing vertically from top to bottom can press the cardboard on the cardboard support plate 232, which is not easy to be blown, and the cardboard support plate 232 is actually a hollow design, which means that if the cardboard supported by the cardboard support plate 232 is small and a part of the cardboard is blocked by the cardboard support plate 232 in the vertical direction, the air flow can also pass through the cardboard support plate 232 and blow onto the cardboard, thereby ensuring the quality of drying.

[0055] The embodiment of the present application discloses a cardboard printing method.

[0056] A cardboard printing method comprises the following steps:

[0057] S1: Configure ink of a set color and add the configured ink to the corresponding printing press;

[0058] S2: Printing: feeding the cardboard into the printing machine, and printing the cardboard with colors and patterns in sequence to obtain the desired printing pattern;

[0059] S3: Transfer and drying: using the transfer and conveying equipment 1 mentioned in the above technical solution to transfer the cardboard, so as to transfer the cardboard to the drying equipment 2 mentioned in the above technical solution for drying.

[0060] Since the cardboard printing method adopts the transfer and conveying equipment 1 and the drying equipment 2 mentioned in the above-mentioned cardboard printing equipment solution during the printing process, the cardboard printing method also has all the technical effects of the above-mentioned printing equipment solution.

[0061] The implementation principle of a cardboard printing device in an embodiment of the present application is as follows: the partition member 12 and the transport conveyor belt form a accommodating cavity that can accommodate cardboard, so that the speed of transporting cardboards by the transfer conveyor device 1 provided with the partition member 12 can be guaranteed, that is, one cardboard is transported per unit time, thereby facilitating the control of the transportation rhythm of the cardboard so as to facilitate matching with the transportation speed of the subsequent drying conveyor belt 22, thereby facilitating the guarantee that each cardboard falls on the two cardboard support assemblies 23 when output from the transfer conveyor device 1, so as to ensure the reliability of transportation; and each cardboard support assembly 23 is arranged obliquely on the drying conveyor belt 22, so that the cardboard is also arranged obliquely on the drying conveyor belt 22 when it is transported to the drying conveyor belt 22, thereby enabling more cardboards to be placed within a unit spacing on the drying conveyor belt 22, so that more cardboards can be accommodated in the drying oven 21 at the same time, thereby improving the drying efficiency.

[0062] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A paperboard printing apparatus characterized by, The paperboard is capable of sliding between two adjacent paperboard supporting assemblies (23) after being transmitted from the transfer conveying belt (11), one side of the paperboard on which ink is not sprayed is in contact with one of the two paperboard supporting assemblies (23), and the other side of the paperboard on which ink is sprayed is not in contact with the other of the two paperboard supporting assemblies (23); The drying conveying belt (22) comprises a track unit, and each track plate is provided with the paperboard supporting assembly (23). The paperboard supporting assembly (23) comprises a supporting base (231) and a paperboard supporting plate (232), the supporting base (231) is provided with a V-shaped groove (2311) penetrating the length direction of the supporting base (231), the bottom of the V-shaped groove (2311) is provided with a hinge shaft sleeve (2312), and the paperboard supporting plate (232) is hinged to the supporting base (231). The paperboard supporting plate (232) comprises a supporting framework (2321), a plurality of auxiliary supporting strips (2322), a limiting block (2323) provided on the supporting framework (2321), and a framework shaft sleeve (2324) provided on the lower frame of the supporting framework (2321), the supporting framework (2321) is a rectangular frame structure, one end of each auxiliary supporting strip (2322) is connected to the upper frame of the supporting framework (2321), and the other end is connected to the lower frame of the supporting framework (2321). The V-shaped groove (2311) comprises a first abutting surface and a second abutting surface, the supporting framework (2321) can abut on the first abutting surface or the second abutting surface, the limiting block (2323) is arranged on the side of the supporting framework (2321) abutting against the second abutting surface, and the limiting block (2323) comprises a limiting surface (23231) perpendicular to the supporting framework (2321).

2. The paperboard printing apparatus of claim 1, wherein: The transfer conveying belt (11) comprises an outer layer and an inner layer, the partition piece (12) is a long strip structure with a semicircular cross section, and the partition piece (12) is arranged between the outer layer and the inner layer and penetrates the width direction of the transfer conveying belt (11).

3. The paperboard printing apparatus of claim 2, wherein: The conveying direction of the transfer conveying belt (11) is inclined to the horizontal direction, and the output end of the transfer conveying belt (11) is connected to the drying conveying belt.

4. The paperboard printing apparatus of claim 1, wherein: The oven (21) comprises a box body (211), an air blowing unit (212) and a heating unit (213), the inside of the box body (211) is formed with a drying cavity, the heating unit (213) is arranged on the inner wall of the drying cavity at both sides of the drying conveying belt (22); the air blowing unit (212) is arranged at the upper part of the box body (211).

5. The paperboard printing apparatus of claim 4, wherein: The air blowing unit (212) comprises an air blower (2121) arranged outside the box body (211) and an air blowing pipeline (2122) arranged inside the box body (211), and a plurality of air outlet grooves (21221) are arranged on one side of the air blowing pipeline (2122) towards the drying conveying belt (22) along the length direction of the air blowing pipeline (2122).

6. A method of printing paperboard, characterized by The method comprises the following steps: S1: configure the ink of the set color and add it to the corresponding printing machine; S2: printing, send the paperboard into the printing machine and print the paperboard in sequence to obtain the required printing pattern; S3: transfer and dry, use the paperboard printing equipment in any one of claims 1 to 5 to transfer the paperboard to the drying equipment (2) for drying.

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