Process, mechanism and device for pasting paper across a connecting portion

Abstract

The present application relates to the packaging box processing technical field, disclose a process for connecting part pasting lining paper, including the following steps: the two covers of the box body are opened, so that its connecting part is exposed; one face of lining paper one is adsorbed, and glue is applied to the other face of lining paper one; lining paper one is aligned with the bottom surface of one cover body of the packaging box, so that the first part of lining paper one is forced to be pasted on the bottom surface of the one cover body on the packaging box, while the second part of lining paper one is pasted on one side wall of the connecting part, and the third part of lining paper one is pasted on the top of the connecting part and extends to the bottom surface of the other cover body; the remaining part of the third part is forced to be pasted on the other side wall of the connecting part and the other cover body by being pressed downward; one face of lining paper two is adsorbed, and glue is applied to the other face of lining paper two, so that lining paper two is pasted on the other cover body. The present application has the beneficial effects of avoiding glue pollution, high degree of automation and small floor area.

Description

Technical Field

[0001] This invention belongs to the field of packaging box processing technology, and specifically relates to a process, mechanism and device for applying backing paper to the cross-connection part of a packaging box. Background Technology

[0002] The part where the two lids of a packaging box are connected is called the connecting part or joint. This part is usually covered with lining paper, which can cover the inside and strengthen the connection between the two lids.

[0003] In existing technologies, automated assembly of the liner paper for both lids and the middle liner paper can already be achieved. The liner paper for the two lids can be assembled by having the lids open upwards, adsorbing one side of the corresponding liner paper through a suction plate and rubbing it against a roller adhesive mechanism. After the other side of the liner paper is coated with adhesive, it can be directly transferred and pasted into the lid body by the suction plate. The remaining middle liner paper can be adsorbed using a packaging material forming component as disclosed in patent CN217729824U, then rubbed with adhesive by a roller adhesive mechanism, and finally positioned and pasted to the middle of the connecting part. During the pressing process, rollers or pressure plates on both sides of the forming component roll downwards from both sides, pressing the middle liner paper against the two side walls of the connecting part. This is a common method for pasting three liner papers into the box.

[0004] However, the inventors discovered another type of packaging box with only two lining papers inside: a large lining paper and a small lining paper. The large lining paper is pasted to the bottom of one lid and extends across the connecting part into the area of ​​another lid. The small lining paper is pasted to the bottom of the other lid, covering and concealing the extended portion of the large lining paper. The aforementioned existing technology cannot yet meet the manufacturing requirements of this box structure. Summary of the Invention

[0005] The technical problem to be solved by the present invention is a process for applying backing paper across the joint to reduce the risk of glue contamination and to achieve mechanical automation with lower difficulty and lower cost.

[0006] Another technical problem to be solved by the present invention is to provide a mechanism for applying backing paper across the connecting part, so as to achieve the application of backing paper across the connecting part at a lower cost.

[0007] Another technical problem to be solved by the present invention is to provide an apparatus for applying backing paper across a connecting part, so as to achieve the pasting of two backing papers across the connecting part at a lower cost.

[0008] This invention is achieved through the following schemes and several combinations thereof:

[0009] The present invention provides a process for applying backing paper across a connecting portion, comprising the following steps:

[0010] The two lids of the box are opened, exposing the connecting part, forming the first box;

[0011] Adhesive is applied to one side of the first liner paper and glue is applied to the other side of the first liner paper; the first liner paper is aligned with the bottom surface of one of the lids of the packaging box, forcing the first part of the first liner paper to first adhere to the bottom surface of the one lid on the packaging box, while the second part of the first liner paper adheres to one side wall of the connecting part and the third part of the first liner paper adheres to the top of the connecting part and extends to the bottom surface of the other lid, forming a second box body.

[0012] The remaining portion of the third part is pressed downwards and attached to the other side wall of the connecting part and the other cover to form a third box body;

[0013] Apply glue to one side of the second absorbent liner paper and attach the second liner paper to the other cover to obtain the fourth box body.

[0014] As a preferred embodiment, two separable modules are used to jointly adsorb one side of the backing paper, with one module being able to move relative to the other, thus creating a step between the two modules.

[0015] As a preferred embodiment, the other module is connected via an elastic reset mechanism or a drive mechanism.

[0016] As a preferred option, the steps after forming the second box and before forming the third box also include pressing down the first part with a pressure block.

[0017] As a preferred option, the steps following the formation of the third box also include pressing the connecting part.

[0018] As a preferred embodiment, the steps following the formation of the fourth housing also include pressing the connecting portion of the fourth housing and / or the bottom surface of the cover.

[0019] Compared with existing technologies, the process of applying backing paper across the connecting part provided by this invention aligns the backing paper of the connecting part with the bottom surface of the lid during molding, thus avoiding glue contamination of the outer sidewall of the box. Furthermore, the backing paper of the connecting part is applied separately in two steps before applying the other backing paper, preventing glue from the other backing paper from contaminating the corresponding area on the sidewall of the connecting part. This process also has the advantage of reducing development difficulty.

[0020] The present invention provides a mechanism for attaching a liner across a connecting portion, the liner covering one cover of a box and extending across the connecting portion to another cover, comprising:

[0021] The platform that supports the box;

[0022] The mold assembly includes first and second modules that are closely attached to each other and a drive mechanism. The drive mechanism controls the first module to move along the side of the second module to a first state and a second state. In the first state, the end faces of the first module and the second module are flush, and in the second state, a step is formed between the first module and the second module.

[0023] Both the first and second modules are equipped with through holes and are connected to the air source through air pipes.

[0024] Compared with the prior art, the mechanism provided by this invention can be used as a standalone device to realize the cross-connection lining process. In addition to the advantages of the above-mentioned process, it also has the advantages of modularity, flexible integration into the production line, and replacement of individual manual workstations.

[0025] The present invention also provides an apparatus for attaching a liner across a connecting portion, the liner comprising a first liner and a second liner, the first liner covering one cover of a box and extending across the connecting portion to another cover, the second liner covering the portion of the first liner located within the other cover, comprising:

[0026] The conveyor line carries the box body to be processed in the following workstations;

[0027] In the first lining station, the lining paper is aligned with the bottom surface of one of the lids of the packaging box, so that the first part of the lining paper is first attached to the bottom surface of the lid of the packaging box, while the second part of the lining paper is attached to one side wall of the connecting part and the third part of the lining paper is attached to the top of the connecting part and extends to the bottom surface of the other lid.

[0028] In the second lining station, the remaining part of the lining paper is pressed downwards and attached to the other side wall of the connecting part and the other cover;

[0029] In the third lining station, lining paper two is attached to another cover body, covering the portion of lining paper one located inside the other cover body.

[0030] As a preferred embodiment, the first lining station is provided with a mold assembly, including a first and a second module that are closely attached to each other and a driving mechanism. The driving mechanism controls the first module to move along the side of the second module to a first and a second state. In the first state, the end faces of the first and second modules are flush, and in the second state, a step is formed between the first and second modules. Both the first and second modules are provided with through holes and are connected to an air source through air pipes.

[0031] As a preferred embodiment, the first and third bonding stations further include: a screen printing device, which is disposed above the mold assembly; and a vertical turntable, on which the mold assembly is disposed, and which can intermittently rotate the mold assembly to a position below the screen printing device.

[0032] As a preferred embodiment, the assembly also includes an adhesive applicator, wherein the mold assembly adsorbs one side of the backing paper from above and exposes the other side below, moves to the adhesive applicator for adhesive application, and then moves to the first backing station to adhere to one of the covers.

[0033] As a preferred embodiment, the gluing device is a roller gluing mechanism or a spray gluing mechanism.

[0034] As a preferred embodiment, the second lining station is provided with a folding mechanism, which includes a pressing block and a folding mold. One end of the pressing block is provided with a spring. In its initial state, the pressing block protrudes outside the folding mold, and the spring is hidden inside the folding mold for telescopic movement. A gap is provided on the folding mold.

[0035] As a preferred embodiment, the device also includes a pressing station, which is equipped with a pressing mold. The pressing mold has a pressing groove, the depth of which is less than or equal to the height of the connecting part.

[0036] As a preferred embodiment, it also includes a foaming station, which is equipped with a foaming mold, the foaming mold having a gap that complements the connecting portion.

[0037] Preferably, the conveyor line is arranged in an elliptical or circular shape. Compared with existing technologies, the device provided by this invention offers high automation and the ability to produce packaging boxes of consistent quality. Attached Figure Description

[0038] Figure 1 A flowchart illustrating the process of attaching two sheets of lining paper to the connecting part across the box body in an embodiment of the present invention.

[0039] Figure 2 This is a perspective view of the second state of the mechanism for attaching backing paper across the connecting portion in an embodiment of the present invention;

[0040] Figure 3 This is a perspective view of the folding mechanism in an embodiment of the present invention;

[0041] Figure 4 This is a partial structural diagram of the device for applying backing paper across the connecting portion in an embodiment of the present invention;

[0042] Figure 5 This is a perspective view (including a schematic diagram of the box body) of the pressing mechanism in an embodiment of the present invention;

[0043] Figure 6This is a top view of the device for attaching backing paper to the cross-connection portion of the annular track in an embodiment of the present invention. Detailed Implementation

[0044] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Example 1:

[0046] like Figure 1 As shown, this diagram illustrates the process of attaching two sheets of backing paper (P1, P2) to the connecting part across box B:

[0047] The incoming material of box B is spread on the platform, exposing the first cover B1, the second cover B2 and the connecting part B0, forming the first box;

[0048] Adhesive is applied to the top surface of the absorbent backing paper P1 and to the bottom surface of the absorbent backing paper P1.

[0049] Align the first part P11 of the backing paper with the three outer edges of the bottom surface of the cover B1 and stick it in. At the same time, stick the second part P12 on the side wall of the connecting part B0 near the cover, providing a barrier above the paper so that the height of the barrier is the same as the inner height of the connecting part. Then, stick the third part P13 on the top surface of the connecting part B0. The remaining parts (P14, P15) extend and float above the bottom surface of the cover B2 to form the second box.

[0050] Then press the remaining parts (P14, P15) down onto the bottom surface of the second cover B2. The fifth part P15 is attached to the bottom surface of the second cover, and the fourth part P14 is attached to the side wall of the connecting part near the second cover to form the third box.

[0051] Then, the top surface of the absorbent liner paper P2 is glued to its bottom surface and directly attached to the bottom surface of the cover body P2 to form the fourth box body.

[0052] The advantages of doing this are:

[0053] If the remaining parts (P14, P15) are not pre-formed and pasted onto the connecting part, but are directly pasted onto the second liner paper (P2) at the same time, the glue on the bottom surface of the second liner paper (P2) will be smeared onto the remaining parts (P14, P15) of the first liner paper, causing glue contamination inside the box.

[0054] If the first part P11 is not pasted to the bottom surface of the cover body B1 first, but the third part P13 of the backing paper is pasted to the top surface of the connecting part first, and then the two covers are pasted along the two side walls by folding the two wings of the backing paper, then the swing radius of the first part P11 and the second part P12 is greater than the inner width of the cover body, causing the glue on the bottom edge of the first part P11 to rub against the outer wall of the cover body. It will also cause glue contamination on the outside of the box due to the uneven tension of the two wings.

[0055] Considering the uncontrollable adhesive properties, when "pressing the remaining parts (P14, P15) down onto the bottom surface of the cover body B2 - the fifth part P15 is attached to the bottom surface of the cover body B2, and the fourth part P14 is attached to the side wall of the connecting part near the cover body B2 to form the third box", a scraper or mold is usually used to press down the remaining parts. However, if the impact force is too large, the already attached parts in the cover body will be pulled off or torn. Therefore, before or at the same time as this step, the first part P11 that has been attached in the cover body can be pressed down first.

[0056] like Figure 3 As shown in the figure, this is the folding mechanism for processing the third box body. The folding mechanism 30 includes a pressing block 31 and a folding mold 32. One end of the pressing block 31 is equipped with a spring 34. In its initial state, the pressing block 31 protrudes outside the folding mold, while the spring 34 is hidden inside the folding mold and can extend and retract. The folding mold is provided with a gap 33, which corresponds to the second, third, and fourth parts (P12, P13, P14) of the lining paper. The parts on both sides of the gap 33 correspond to the first part P11 and the fifth part P15 of the lining paper, respectively. When the folding mechanism 30 descends towards the second box body, the pressing block 31 first presses down on the first part P11, and then the folding mold 32 descends to press the remaining parts (P14, P15) down towards the bottom surface of the second cover body B2—the fifth part is attached to the bottom surface of the second cover body, and the fourth part P14 is attached to the side wall of the connecting part near the second cover body, forming the third box body.

[0057] Example 2:

[0058] like Figure 2 As shown, this figure is a perspective view of the second state of the mechanism for attaching backing paper across the connecting portion. The mechanism includes:

[0059] The platform supporting the box (not shown in the figure) is where the box B is laid out, exposing the cover body one B1, cover body two B2 and connecting part B0.

[0060] The mold assembly 20 includes a first module 21 and a second module 22. A bracket 24 holds the two modules together but allows them to be separated. A drive mechanism 23 is connected to the other end of the first module 21 and drives the first module 21 to move, giving the mold assembly 20 two states:

[0061] The first state is that the bottoms of the first and second modules are flush, which is applicable to supporting the whole liner paper P1 from one of its surfaces before the liner paper is formed.

[0062] The second state is that the driving mechanism 23 drives the first module to rise along the side of the second module, forming a step 25 between the first and second modules, and the height of the step 25 matches the height of the target connecting part.

[0063] Both the first and second modules have through holes 26 connected to the air source.

[0064] Furthermore, a demolding rod channel 27 is also provided at the center of the second module 22 for the demolding rod to extend out from this channel. After the first liner paper is pasted into the cover body, the demolding rod presses against the cover body, and the mold assembly disengages from the box body.

[0065] Alternatively, the driving mechanism can be replaced with an elastic reset mechanism. For example, a rod is used to connect the end of the first module, and a spring is sleeved outside the rod. In the second state, the first module 21 is pushed up by the connecting part to compress the spring, forming a step between the two.

[0066] Embodiment 3:

[0067] As Figure 4 shown, this figure is a partial structural diagram of the device for pasting the liner paper across the connecting part.

[0068] This device includes a conveyor line 60, which can be a conveyor belt or a slide rail. The box body is transported to each working station through the conveyor line for processing;

[0069] The first liner paper pasting station 61, where a mold assembly 20 is arranged. The mold assembly 20 is the same as that disclosed in Embodiment 2. The mold assembly 20 receives the first liner paper P1 at this station and pastes it inside the first cover body, making the first liner paper in a zigzag shape, that is, the second box body;

[0070] The second liner paper pasting station 62, where a hemming mechanism 30 is arranged. The hemming mechanism is the same as that disclosed in Embodiment 1. The hemming mechanism 30 folds and forms a part of the floating liner paper in the second box body into a "Ji" shape, forming the third box body;

[0071] The third liner paper pasting station 63, where the adsorption mold 40 pastes the second liner paper on the second cover body B2 of the third box body to cover the fifth part P15 of the first liner paper, forming the fourth box body.

[0072] The process executed in this embodiment includes the steps in Embodiment 1, but the following steps are added to ensure the processing quality during the processing.

[0073] After the third box body is formed, the connecting part is already covered. To improve the forming effect of the connecting part, a pressing die is promptly used to squeeze the top edge of the connecting part, making the creases of the lining paper in the connecting part sharper, resulting in a higher-quality box product. This step can also be performed during or after the bubble pressing step. Figure 5 As shown, a pressing die 70 is provided on the pressing station 65. The pressing die includes a pressing groove 71. The depth of the pressing groove is less than or equal to the height of the connecting part B0, so that the top surface of the pressing groove 71 can abut against the top surface of the connecting part B0.

[0074] To ensure a tighter adhesion, a bubble-pressing station 64 is provided, where a bubble-pressing mold 50 extends into the fourth housing to individually press and remove bubbles from the connecting parts and / or the bottom surface of the cover. The bubble-pressing mold 50 has a gap in the middle that matches the connecting parts, and blocks on both sides of the gap extend into the two cover bodies to apply pressure.

[0075] Example 4

[0076] The difference between this embodiment and Embodiment 3 lies in the layout method of the workstations. The workstation layout in this embodiment is more efficient, highly scalable, and occupies less space.

[0077] like Figure 6 As shown, the conveyor line 60 in this device adopts a circular track layout, with each workstation arranged along the circular track.

[0078] Compared to Embodiment 3, it also includes an incoming material conveyor line 81, through which the box is fed in.

[0079] At loading station 83, the box is positioned and clamped.

[0080] The liner paper feeding device 85 feeds a large amount of liner paper into individual sheets to the first liner station 61 and assembles it with the first box body to form the second box body.

[0081] The third box is formed at the second lining station 62;

[0082] The top edges of the connecting part are pressed and shaped at the pressing station 65.

[0083] The fourth box is formed after the third lining station 63;

[0084] The connecting parts and / or backing paper are bubble-pressed at the 64th bubble-pressing station;

[0085] The material is unloaded at station 84, released from its positioning position, and transferred to the unloading conveyor line 82, where it is transferred to the next station for continued operation or to a collection device for collection.

[0086] Furthermore, in combination Figure 4 and Figure 6To integrate more processes within a unit area and improve the efficiency of continuous processing, the gluing process for the backing paper is combined with the pasting step. A vertical turntable carrier is set up on the first pasting station 61, and multiple mold components 20 are placed on the turntable carrier, allowing the mold components to rotate three-dimensionally at this station. A screen printing device is set up above the vertical turntable. After the mold component receives the first backing paper, it rotates to the top, and the screen printing device above applies glue to one side of the first backing paper. As the vertical turntable continues to rotate and carries the backing paper down to the bottom, the drive mechanism on the mold component 20 drives the module to descend and paste the first backing paper into the box. The more mold components set on the vertical turntable, the smaller the rotation angle of the turntable and the shorter the time of each cycle, thus improving the processing efficiency of the entire line.

[0087] Similarly, a vertical turntable can also be used for gluing at the third gluing station. The use of more identical structures reduces the cost of mass production of this device.

[0088] Please refer to the Chinese invention patent document "Three-dimensional screen printing adhesive device and process", publication number CN114953593A for understanding.

[0089] Example 5

[0090] The difference between this embodiment and embodiment four is that the adhesive is applied to one surface of the backing paper P1.

[0091] In this embodiment, an adhesive application device is provided in addition to the lining station. This adhesive application device can be a roller adhesive application mechanism.

[0092] The roller gluing device is existing technology. It uses a mold assembly to adsorb one side of the backing paper P1, exposing its bottom surface. A moving module is set up to control the mold assembly to pass tangentially and rub against the roller of the roller gluing device. The glue on the glue roller is transferred to the bottom surface of the backing paper, and then it is transferred to the cover B1 for pasting by the mold assembly.

[0093] Example 6

[0094] The difference between this embodiment and embodiment five is that adhesive is applied to one surface of the backing paper P1.

[0095] The glue application device in this embodiment is a glue spraying device, which includes a glue gun and a glue control system, with the glue gun pointing upwards.

[0096] The roller gluing device is existing technology. It uses a mold assembly to adsorb one side of the backing paper P1, exposing its bottom surface. A moving module controls the mold assembly to move above the glue gun, which sprays glue onto the bottom surface of the backing paper. The paper is then transferred by the mold assembly to the cover B1 for pasting. Multiple glue guns can be set to achieve high-density glue spraying on the bottom surface, approximately equivalent to spraying glue onto the entire bottom surface.

[0097] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0098] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0099] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0100] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" of the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0101] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. Process for the application of a lining paper across a joint, characterized in that, The process comprises the following steps: Two covers of the box are opened to expose the connecting part, forming a first box; One side of the first liner is adsorbed, and glue is applied to the other side of the first liner; the first liner is aligned with the bottom of one cover of the packaging box, and the first part of the first liner is forced to be pasted on the bottom of the one cover of the packaging box, while the second part of the first liner is pasted on one side wall of the connecting part, and the third part of the first liner is pasted on the top of the connecting part and extends to the space above the bottom of the other cover, forming a second box; The remaining part of the first liner is forced to be pasted on the other side wall of the connecting part and the other cover, forming a third box; One side of the second liner is adsorbed, and glue is applied to the other side of the second liner; the second liner is pasted on the other cover, forming a fourth box.

2. The process of claim 1, wherein: Two modules are used to adsorb one side of the first liner, and one of the modules can move relative to the other module to form a step between the two modules.

3. The process of claim 2, wherein: The other module is connected through an elastic reset mechanism or a driving mechanism.

4. The process of claim 1, wherein: After the second box is formed and before the third box is formed, the step further comprises using a pressing block to press the first part.

5. The process of claim 1, wherein: After the third box is formed, the step further comprises pressing the connecting part.

6. The process for splicing paper across a joint according to claim 1, characterized in that, After the fourth box is formed, the step further comprises: Pressing the connecting part and / or the bottom of the cover of the fourth box.

7. A mechanism for applying a liner across a connecting portion of a box, for carrying out the process of any one of claims 1 to 6, the liner covering one of the covers of the box and spanning across the connecting portion to the other cover, characterised in that, It comprises: A platform for carrying the box; A mold assembly comprising a first module and a second module in close contact with each other and a driving mechanism, the driving mechanism controls the first module to move along the side of the second module to a first state and a second state; wherein the first state is that the end face of the first module is flush with the end face of the second module, and the second state is that a step is formed between the first module and the second module; Holes are formed in the first module and the second module, and the holes are connected to the air source through the air pipe.

8. An apparatus for attaching a liner sheet to a connecting portion, the liner sheet comprising a first liner sheet and a second liner sheet, the first liner sheet covering one of the cover bodies and extending to the connecting portion of the other cover body, the second liner sheet covering the portion of the first liner sheet located in the other cover body, characterized in that, It comprises: A conveying line for carrying the box to be processed in the following stations; A first liner pasting station for aligning the first liner with the bottom of one cover of the packaging box, so that the first part of the first liner is pasted on the bottom of the one cover of the packaging box, while the second part of the first liner is pasted on one side wall of the connecting part, and the third part of the first liner is pasted on the top of the connecting part and extends to the space above the bottom of the other cover; A second liner pasting station for forcing the remaining part of the first liner to be pasted on the other side wall of the connecting part and the other cover; A third liner pasting station for pasting the second liner on the other cover to cover the part of the first liner in the other cover.

9. The device of claim 8, wherein: The first lining station is provided with a mold assembly, including a first module and a second module which are tightly attached to each other, and a driving mechanism which controls the first module to move along the side of the second module to a first state and a second state; wherein the first state is that the end faces of the first module and the second module are flush, and the second state is that a step is formed between the first module and the second module. The first module and the second module are both provided with through holes and are connected to an air source through an air pipe.

10. The apparatus for splicing paper across a joint according to claim 9, wherein The first lining station and the third lining station further include: A silk printing device which is arranged above the mold assembly; A vertical rotary disc on which the mold assembly is arranged, and the vertical rotary disc can carry the mold assembly to rotate to below the silk printing device in an intermittent manner.

11. The apparatus for splicing paper across a joint according to claim 9, wherein Further include: A gluing device, the mold assembly adsorbs one face of the lining paper from above and exposes the other face below, moves to the gluing device to perform gluing, and then moves to the first lining station to paste with the one cover body.

12. The apparatus for splicing paper across a joint according to claim 11, wherein The gluing device is a roller gluing mechanism or a glue spraying mechanism.

13. The device for lining paper across a connecting part according to claim 8, characterized in that: The second lining station is provided with a folding edge mechanism, the folding edge mechanism includes a pressing block and a folding edge mold, one end of the pressing block is provided with a spring, the initial state of the pressing block protrudes out of the folding edge mold, the spring is hidden in the folding edge mold to perform telescopic movement, and a gap is arranged on the folding edge mold.

14. The apparatus for splicing paper across a joint according to claim 8, wherein Further include: A pressing edge station which is provided with a pressing edge mold, the pressing edge mold is provided with a pressing groove, and the depth of the pressing groove is less than or equal to the height of the connecting part.

15. The apparatus for splicing paper across a joint according to claim 8, wherein Further include: A bubble pressing station which is provided with a bubble pressing mold, and the bubble pressing mold is provided with a gap which is complementary to the connecting part.

16. The device for lining paper across a connecting part according to any one of claims 8-15, characterized in that: The conveying line is arranged in an elliptical or circular shape.

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