Surface multi-resistant decor paper intaglio printing apparatus

Abstract

The present application relates to the technical field of gravure printing, and discloses a surface multi-resistance decorative paper gravure printing device, which comprises a left base frame, a lower fixing frame, a circulating liquid conveyor, an ink printing unit, a protective layer roller coating unit, a dryer, a right base frame and a recycling box; the lower fixing frame is fixed to the upper side of the left base frame, and the circulating liquid conveyor is fixed to the inner side of the lower fixing frame; the circulating liquid conveyor is composed of a water storage tank and a water pump; the ink printing unit is placed on the right side of the left base frame, the protective layer roller coating unit is placed on the right side of the ink printing unit, the dryer is fixed to the upper side of the right side of the protective layer roller coating unit, the right base frame is placed on the right side of the protective layer roller coating unit, and the recycling box is fixed to the upper side of the right side of the right base frame; a roller conveying unit for conveying a base material layer is connected between the left base frame and the lower fixing frame. The present application has the characteristics of small deformation error, low production cost and multi-resistance performance.

Description

Technical Field

[0001] This invention relates to the field of gravure printing technology, and in particular to a gravure printing apparatus for decorative paper with multiple surface resistance. Background Technology

[0002] In the gravure printing of decorative paper, the substrate layer needs to be stretched to prevent wrinkles. The ink printing unit used in the pattern printing is a WAD-800B gravure printing machine. During operation, the printing rollers apply pressure to transfer ink to the substrate layer. After the pattern printing is completed on the substrate layer, a QG-1300# roller coater is used to apply multiple protective layers, followed by drying with a TY-UV1000 dryer to improve the paper's abrasion resistance, stain resistance, solvent resistance, and antibacterial properties. However, for some softer and thinner substrate layers, due to their poor deformation resistance, it is not easy to directly stretch and extend them for pattern printing and protective layer coating. Therefore, large precision errors are likely to occur during production, and multiple protective layers are not suitable, thus affecting the improvement of various properties and ultimately impacting the service life and aesthetics of the finished decorative paper.

[0003] Chinese patent CN104191854B discloses a process for solving the wrinkling problem of aluminum foil in gravure printing. The process involves attaching a layer of aluminum foil to both sides of the substrate layer, and then covering each of the two outward-facing sides of the aluminum foil with a layer of silicone protective film to protect the substrate layer and aluminum foil from deformation. However, this process uses limited materials and requires a large amount of silicone raw materials, resulting in a significant cost waste. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems existing in the printing of substrates with relatively soft materials and thin thickness, the present invention provides a gravure printing device for decorative paper with small deformation error, low production cost and multiple resistance properties.

[0005] The first technical solution of the present invention: a gravure printing process for surface-resistant decorative paper, comprising the following steps:

[0006] (S01) Synthesis of silica gel liquid

[0007] Take appropriate amounts of olefin silicone oil, silicone oil, crosslinking agent, catalyst and curing agent, put them into the feeding chamber, stir and mix to obtain silicone liquid;

[0008] (S02) Silicone liquid coating

[0009] Take a decorative paper substrate and apply the silicone liquid from step (S01) to the back of the decorative paper substrate to form a silicone film;

[0010] (S03) Pattern Printing

[0011] The pattern is printed on the decorative paper substrate covered with silicone film in step (S02) by the ink printing unit;

[0012] (S04) Protective coating

[0013] A protective layer is applied to the decorative paper substrate with the printed pattern in step (S03) by a protective layer roller coating unit; this improves the wear resistance, stain resistance, solvent resistance and antibacterial properties of the finished decorative paper.

[0014] (S05) Silicone membrane removal

[0015] After the protective layer in step (S04) dries, peel off the silicone film on the back of the decorative paper substrate to obtain the finished decorative paper.

[0016] Before printing patterns and applying protective coatings to the substrate of decorative paper, this invention first covers the back of the substrate layer with a silicone film to increase the hardness and thickness of the substrate layer. This ensures that the substrate layer has sufficient resistance to deformation during subsequent pattern printing and protective coating processes, preventing significant deformation errors. This invention solves the technical problem that substrate layers with soft and thin materials have poor deformation resistance, making them difficult to stretch and extend for pattern printing and protective coating, thus affecting the service life and aesthetics of the finished decorative paper. It completes various protective coating processes on the substrate layer, improving the decorative paper's wear resistance, stain resistance, solvent resistance, and antibacterial properties.

[0017] Preferably, the crosslinking agent is a silane crosslinking agent; the catalyst is platinum water; and the curing agent is an organosilicon alkane curing agent.

[0018] Preferably, the silicone liquid coating includes silicone liquid coating and silicone film compaction;

[0019] The silicone coating process involves spraying the silicone liquid from step (S01) onto the back of the decorative paper substrate, and spraying the silicone liquid again after it dries and solidifies. This process is repeated multiple times to form multiple sets of parallel silicone film layers.

[0020] The silicone film compaction involves pressing multiple sets of parallel silicone film layers together and splicing these long strip-shaped layers to form a complete silicone film. The silicone film covering the back of the substrate is composed of multiple sets of parallel strip-shaped silicone layers. This structure ensures sufficient tensile strength for the substrate while reducing the amount of silicone liquid used, lowering the production cost of the silicone liquid raw material, and enabling efficient and rapid removal of the silicone film during the subsequent silicone film recycling process.

[0021] Preferably, the mass ratio of the olefin silicone oil, silicone oil, crosslinking agent, catalyst and curing agent is 22-28:1:27-32:0.07-0.12:0.16-0.23.

[0022] Preferably, the mass ratio of the olefin silicone oil, silicone oil, crosslinking agent, catalyst, and curing agent is 25:1:30:0.1:0.2.

[0023] The second technical solution of the present invention: a gravure printing equipment for surface multi-resistance decorative paper, comprising a left base frame, a lower fixed frame, a circulating liquid conveyor, an ink printing unit, a protective layer roller coating unit, a dryer, a right base frame, and a recycling bin; the lower fixed frame is fixedly connected to the upper right side of the left base frame, and the circulating liquid conveyor is fixedly connected to the inner side of the lower fixed frame; the circulating liquid conveyor consists of a water storage tank and a water pump; the ink printing unit is placed on the right side of the left base frame, and a dryer is placed on the right side of the ink printing unit. A protective layer roller coating unit has a dryer fixedly connected to the upper right side of the unit, a right base frame placed on the right side of the unit, and a recycling bin fixedly connected to the upper right side of the right base frame; a roller conveying unit for conveying the substrate layer is connected between the left base frame and the lower fixed frame; a coating unit for forming a silicone layer on the back of the substrate layer is connected to the upper side of the lower fixed frame; the coating unit is connected to a circulating liquid conveyor; and a film-removing unit for removing the silicone layer on the back of the substrate layer is connected to the right base frame. First, the roll-shaped substrate layer for producing decorative paper is hung on the roller conveying unit. The first end of the substrate layer is pulled out and passed between the rollers of the roller conveying unit, the laminating unit, the ink printing unit, the protective layer roller coating unit, the dryer, and the tear-off unit, and then wound around the take-up roller of the tear-off unit, completing the pre-arrangement of the substrate layer. Then, olefin silicone oil, silicone oil, crosslinking agent, catalyst, and curing agent, which are prepared in proportion, are poured into the feeding chamber of the laminating unit and stirred to obtain silicone liquid, completing the pre-treatment work before processing the substrate layer. This solves the technical problem that the substrate layer, which is relatively soft and thin, has poor resistance to deformation and is not easy to stretch and extend directly for pattern printing and protective layer coating, affecting the service life and aesthetics of the finished decorative paper. This completes the various protective layer coating work on the substrate layer, improving the wear resistance, stain resistance, solvent resistance, and antibacterial properties of the decorative paper.

[0024] Preferably, the roller conveying unit includes a feeding roller, a first conveying roller group, a first carrying roller, a coating roller, and a second conveying roller group; the feeding roller is rotatably connected to the lower left side of the left base frame, the first conveying roller group is rotatably connected to the upper left side of the left base frame, the first carrying roller is rotatably connected to the left side of the upper part of the lower fixed frame, the coating roller is rotatably connected to the middle side of the upper part of the lower fixed frame, a plurality of first liquid guiding grooves are transversely opened around the outer surface of the coating roller, a second liquid guiding groove is opened in the middle of each of the first liquid guiding grooves around the coating roller, the second conveying roller group is rotatably connected to the right side of the upper part of the lower fixed frame, and the coating unit is connected to the upper side of the lower fixed frame. The first and second conveyor roller groups, in conjunction with the ink printing unit, the protective layer roller coating unit, and the various conveyor rollers in the dryer, simultaneously transport the substrate layer to the right, completing the conveying work before processing the substrate layer. The silicone liquid covers the upper surface of the substrate layer along the first and second guide grooves of the coating roller. Each group of silicone film layers is stretched into long strips and compacted, so that the compacted silicone film layers are spliced ​​together to form a complete silicone film.

[0025] Preferably, the coating unit includes an upper fixing frame, a feeding chamber, a conveying pipe, a hot air blower, a collecting hopper, a transfer pipe, and a dryer; the upper fixing frame is fixedly connected to the upper side of the lower fixing frame, the right side of the lower side of the upper fixing frame is coaxial with the coating roller, the feeding chamber is fixedly connected to the upper side of the upper fixing frame, the conveying pipe is connected to the lower side of the feeding chamber and inserted into the lower fixing frame, the hot air blower is fixedly connected to the middle of the lower side of the upper fixing frame, the collecting hopper is fixedly connected to the right side of the lower side of the upper fixing frame, the transfer pipe is fixedly connected to the lower side of the upper fixing frame, the front end and rear end of the transfer pipe are respectively connected to a circulating liquid conveyor, the lower side of the collecting hopper is connected to the transfer pipe, and the dryer is fixedly connected to the right side of the upper fixing frame. The feed pipe slowly sprays molten silicone from the feeding chamber onto the coating roller. The molten silicone flowing down the first and second guide grooves of the coating roller continuously covers the upper surface of the substrate layer. Each silicone film assembly is stretched into a long strip. The two rollers of the second conveying roller group compact these long strips of silicone film, allowing them to be spliced ​​together into a complete silicone film. This completes the silicone film coating process on the back of the substrate layer, ensuring sufficient tensile strength for the substrate layer while reducing the amount of molten silicone used and lowering the cost of the silicone liquid. The cost of material usage is reduced, and in the subsequent silicone film removal process, grouping and removing the silicone film helps to improve the removal speed and effect. The hot air blows hot air to the lower right, causing the silicone liquid remaining on the surface of the laminating roller to be blown away to the right and fall into the collection hopper. This avoids the phenomenon that a large amount of silicone liquid remains on the surface of the laminating roller and solidifies on the surface of the laminating roller as the silicone liquid continues to dry, causing the first and second liquid guide grooves of the laminating roller to be blocked by the dried silicone liquid. This ensures that the silicone film covering the back of the substrate layer has uniform integrity.

[0026] Preferably, the film-tearing unit includes an stretching assembly, a first drive motor, a spur gear, a scraper roller, scrapers, a third conveying roller group, and a take-up roller. The first drive motor is fixedly connected to the middle of the rear side of the right base frame. The output shaft of the first drive motor is fixedly connected to a spur gear, which is connected to the stretching assembly. A scraper roller is rotatably connected to the right side of the upper side of the right base frame. Several scrapers are fixedly connected to the outer surface of the scraper roller. The third conveying roller group is rotatably connected to the middle of the right base frame. A take-up roller is rotatably connected to the lower right side of the right base frame. The output shaft of the first drive motor drives the spur gear to rotate, which in turn drives the stretching assembly to work. This causes the stretching assembly to carry the substrate layer between the stretching assembly and the scraper roller. Finally, the substrate layer is wound onto the take-up roller, completing the finishing work on the substrate layer.

[0027] Preferably, the extension assembly includes a second bearing roller, a central column, an annular slider, an annular roller, and an annular plate; the second bearing roller is rotatably connected to the left side of the upper side of the right base frame, the central column is fixedly connected to the middle of the upper side of the right base frame, an annular slider is slidably connected to the front end and the rear end of the outer surface of the central column, an annular roller is fixedly connected between the two annular sliders, a first groove is opened on the right side of the central column, a second groove is opened on the right side of the annular roller, an annular plate is fixedly connected to the rear end of the annular roller, and a plurality of tooth grooves corresponding to spur gears are opened around the outer surface of the annular plate, the spur gears meshing with the tooth grooves of the annular plate. The area where the protective layer coating has been applied to the substrate layer continues to move to the right. As the substrate layer passes through the annular roller and the scraper roller, the clockwise rotating scraper roller scrapes off the silicone film covering the surface of the substrate layer. Since the silicone film consists of multiple long strips of silicone film layers, each strip is scraped upwards by the scraper. The torn silicone film is then flung to the right by the scraper roller into the recycling bin, completing the rapid removal of the silicone film from the substrate layer. This ensures that the silicone film on the back of the substrate layer is removed promptly after the pattern printing and multiple protective layer coating processes are completed, preventing the silicone film from solidifying on the substrate layer for an extended period, which would increase the thickness of the substrate layer and make it difficult to remove later.

[0028] Preferably, the central column is provided with an auxiliary unit; the auxiliary unit includes an elastic element, an ejector plate and an erasing assembly; a number of elastic elements are fixedly connected to the first slot on the right side of the central column, and an ejector plate is fixedly connected between the right ends of all the elastic elements; an erasing assembly is connected to the right side of the upper side of the right base frame, and the erasing assembly is located between the surrounding scraper roller and the third conveyor roller group. During the scraping process of the scraper roller removing the silicone film covering the surface of the substrate layer, the ejector plate first pushes a small portion of the substrate layer that is tightly attached to the surface of the annular roller to the right, causing the silicone film in the ejected area of ​​the substrate layer to bulge to the right, improving the scraping effect of the scraper on the silicone film. Then, the rotating annular roller pushes the ejector plate, causing the elastic element to compress to the left. The ejector plate is pushed into the interior of the annular roller, while the annular roller continues to convey the substrate layer towards the scraper roller, causing the scraper to tear off the silicone film. When the second groove of the annular roller aligns with the ejector plate, the compressed elastic element causes the ejector plate to pop out to the right and reset. The ejector plate reciprocates to push the substrate layer to the right, improving the tearing efficiency of the silicone film.

[0029] Preferably, the erasing assembly includes a transverse slide rail, a spring slider, a rubber rod, a second drive motor, and a cam. The transverse slide rail is bolted to the right side of the upper side of the right base frame. The transverse slide rail is located between the surrounding scraper roller and the third conveying roller group. A spring slider is connected to the upper side of the transverse slide rail. A rubber rod is fixed to the left side of the spring slider. Several protruding structures are provided on the left side of the rubber rod. A second drive motor is bolted to the rear side of the upper side of the transverse slide rail. A cam is fixed to the output shaft of the second drive motor, and the cam is in close contact with the rear end of the rubber rod. The output shaft of the second drive motor drives the cam to rotate, and the cam drives the spring slider to move back and forth along the transverse slide rail. This causes the spring slider to drive the protruding structures of the rubber rod, applying a transverse cleaning force to the silicone film debris remaining on the surface of the substrate layer. This completes the erasing of the silicone film debris remaining on the surface of the substrate layer, ultimately solving the technical problem that a relatively soft and thin substrate layer, due to its poor resistance to deformation, is not easily stretched and extended for pattern printing and protective layer coating, affecting the service life and aesthetics of the finished decorative paper product.

[0030] The present invention has the following beneficial effects:

[0031] The roll-shaped substrate layer for producing decorative paper is hung on the roller conveying unit. The first end of the substrate layer is pulled out and passed between the rollers of the roller conveying unit, the laminating unit, the ink printing unit, the protective layer roller coating unit, the dryer, and the tear-off unit. It is then wound around the take-up roller of the tear-off unit, completing the pre-arrangement of the substrate layer. Subsequently, olefin silicone oil, silicone oil, crosslinking agent, catalyst, and curing agent, which are prepared in proportion, are poured into the feeding chamber of the laminating unit and stirred to obtain silicone liquid. This completes the pre-treatment work before processing the substrate layer. This solves the technical problem that the substrate layer, which is relatively soft and thin, has poor resistance to deformation and is not easy to stretch and extend for pattern printing and protective layer coating, affecting the service life and aesthetics of the finished decorative paper. This completes the various protective layer coating work on the substrate layer, improving the wear resistance, stain resistance, solvent resistance, and antibacterial properties of the decorative paper. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the present application;

[0033] Figure 2 This is a partial cross-sectional view of the silicone film of this application;

[0034] Figure 3 This is a three-dimensional structural diagram of the roller conveying unit of this application;

[0035] Figure 4 This is a partial three-dimensional structural diagram of the roller conveying unit of this application;

[0036] Figure 5This is a partial three-dimensional structural diagram of the coating roller of this application;

[0037] Figure 6 This is a schematic diagram of the three-dimensional structure of the coating unit in this application;

[0038] Figure 7 This is an enlarged view of region V of the coating unit in this application;

[0039] Figure 8 This is a schematic diagram of the first three-dimensional structure of the film-tearing unit of this application;

[0040] Figure 9 This is a schematic diagram of the first three-dimensional structure of the film-tearing unit of this application;

[0041] Figure 10 This is a partial three-dimensional structural diagram of the film-tear unit of this application;

[0042] Figure 11 This is a schematic diagram of the three-dimensional structure of the auxiliary unit in this application;

[0043] Figure 12 This is a three-dimensional structural diagram of the erasure component of this application.

[0044] The labels in the attached diagram are as follows: 100-roller conveyor unit; 200-coating unit; 300-film peeling unit; 400-auxiliary unit; 1-left base frame; 2-lower fixed frame; 3-circulating liquid conveyor; 31-water tank; 32-water pump; 4-ink printing unit; 5-protective layer roller coating unit; 6-dryer; 7-right base frame; 8-recovery box; 9-substrate layer; 91-silicone liquid; 92-silicone film; 101-winding roller; 102-first conveyor roller group; 103-first carrier roller; 104-coating roller; 1041-first liquid guide trough; 1042-second liquid guide trough; 105-second conveyor roller group; 201-upper fixed frame; 20 2-Feeding chamber; 203-Conveying pipe; 204-Hot air blower; 205-Collection hopper; 206-Transfer pipe; 207-Dryer; 301-Second bearing roller; 302-Central column; 303-Annular slider; 304-Annular roller; 305-Annular plate; 306-First drive motor; 307-Spur gear; 308-Scraper roller; 3081-Scraper; 309-Third conveying roller group; 310-Rewinding roller; 3021-First slot; 3041-Second slot; 401-Elastic element; 402-Ejector plate; 403-Transverse slide rail; 404-Spring slider; 405-Rubber rod; 406-Second drive motor; 407-Cam. Detailed Implementation

[0045] The present invention will be further described below with reference to the embodiments and accompanying drawings, but this should not be construed as limiting the present invention.

[0046] The gravure printing process for multi-resistance decorative paper includes the following steps.

[0047] (S01) Synthesis of silica gel liquid

[0048] Take appropriate amounts of olefin silicone oil, silicone oil, crosslinking agent, catalyst and curing agent, put them into the feeding chamber, and stir to mix to obtain silicone liquid; the mass ratio of olefin silicone oil, silicone oil, crosslinking agent, catalyst and curing agent is 22~28:1:27~32:0.07~0.12:0.16~0.23; more preferably, the mass ratio of olefin silicone oil, silicone oil, crosslinking agent, catalyst and curing agent is 25:1:30:0.1:0.2.

[0049] (S02) Silicone liquid coating

[0050] Take a decorative paper substrate and apply the silicone liquid from step (S01) to the back of the decorative paper substrate to form a silicone film;

[0051] Silicone liquid coating includes silicone liquid coating and silicone film compaction;

[0052] The silicone coating process involves spraying the silicone liquid from step (S01) onto the back of the decorative paper substrate. After the silicone liquid dries and solidifies, the silicone liquid is sprayed again. This process is repeated multiple times to form multiple sets of parallel silicone film layers.

[0053] Silicone film compaction involves pressing multiple parallel silicone film layers together and splicing the long strips of silicone film layers to form a complete silicone film.

[0054] (S03) Pattern Printing

[0055] The pattern is printed on the decorative paper substrate covered with silicone film in step (S02) by the ink printing unit;

[0056] (S04) Protective coating

[0057] A protective layer is applied to the decorative paper substrate with the printed pattern in step (S03) by a protective layer roller coating unit; this improves the wear resistance, stain resistance, solvent resistance and antibacterial properties of the finished decorative paper.

[0058] (S05) Silicone membrane removal

[0059] After the protective layer in step (S04) dries, peel off the silicone film on the back of the decorative paper substrate to obtain the finished decorative paper.

[0060] like Figure 1 The gravure printing equipment for surface-resistant decorative paper shown includes, for example: Figure 3 The left base frame 1 shown is as follows: Figure 4 The following components are shown: 2. Lower fixing frame; 3. Circulating liquid conveyor; 4. Ink printing unit; 5. Protective layer roller coating unit; 6. As shown in the figure. Figure 6 The dryer 6 shown is as follows: Figure 9 The right-side base frame 7 shown and as follows Figure 8 The recycling bin 8 shown; a lower fixed frame 2 is fixedly connected to the right side of the upper side of the left base frame 1, and a circulating liquid conveyor 3 is fixedly connected to the inner side of the lower fixed frame 2; the circulating liquid conveyor 3 consists of a water storage tank 31 and a water pump 32; an ink printing unit 4 is placed on the right side of the left base frame 1, a protective layer roller coating unit 5 is placed on the right side of the ink printing unit 4, a dryer 6 is fixedly connected to the upper right side of the protective layer roller coating unit 5, a right base frame 7 is placed on the right side of the protective layer roller coating unit 5, and a recycling bin 8 is fixedly connected to the upper right side of the right base frame 7; a roller conveying unit 100 for conveying the substrate layer 9 is connected between the left base frame 1 and the lower fixed frame 2, and a device for conveying the substrate layer 9 is connected to the upper side of the lower fixed frame 2. Figure 2 The substrate layer 9 shown has a silicone layer formed on its back side. The coating unit 200 is connected to the circulating liquid conveyor 3. The right base frame 7 is connected to a film-removing unit 300 for removing the silicone layer on the back side of the substrate layer 9.

[0061] The roller conveying unit 100 includes a feeding roller 101, a first conveying roller group 102, a first carrying roller 103, and so on. Figure 5 The coating roller 104 and the second conveying roller group 105 are shown. The lower left side of the left base frame 1 is rotatably connected to the feeding roller 101, the upper left side of the left base frame 1 is rotatably connected to the first conveying roller group 102, the upper left side of the lower fixing frame 2 is rotatably connected to the first bearing roller 103, the middle side of the upper part of the lower fixing frame 2 is rotatably connected to the coating roller 104, a plurality of first liquid guiding grooves 1041 are transversely opened around the outer surface of the coating roller 104, and a second liquid guiding groove 1042 is opened in the middle of each first liquid guiding groove 1041 around the coating roller 104. The right side of the upper part of the lower fixing frame 2 is rotatably connected to the second conveying roller group 105, and the upper side of the lower fixing frame 2 is connected to the coating unit 200.

[0062] The coating unit 200 includes, for example, Figure 7The upper fixed frame 201, feeding chamber 202, conveying pipe 203, hot air blower 204, collecting hopper 205, transfer pipe 206, and dryer 207 are shown. The upper fixed frame 201 is fixedly connected to the upper side of the lower fixed frame 2. The right side of the lower side of the upper fixed frame 201 is coaxial with the coating roller 104. The feeding chamber 202 is fixedly connected to the upper side of the upper fixed frame 201. The conveying pipe 203 is connected to the lower side of the feeding chamber 202. 03 The lower fixing frame 2 is inserted. A hot air blower 204 is fixedly connected to the middle of the lower side of the upper fixing frame 201. A collection hopper 205 is fixedly connected to the right side of the lower side of the upper fixing frame 201. A transfer pipe 206 is fixedly connected to the lower side of the upper fixing frame 201. The front end and rear end of the transfer pipe 206 are respectively connected to the circulating liquid conveyor 3 through pipes. The lower side of the collection hopper 205 is connected to the transfer pipe 206. A dryer 207 is fixedly connected to the right side of the upper fixing frame 201.

[0063] The film-tearing unit 300 includes an extension assembly, a first drive motor 306, a spur gear 307, a scraper roller 308, scrapers 3081, a third conveyor roller group 309, and a take-up roller 310. The first drive motor 306 is fixedly connected to the middle of the rear side of the right base frame 7. The output shaft of the first drive motor 306 is fixedly connected to the spur gear 307, which is connected to the extension assembly. The scraper roller 308 is rotatably connected to the right side of the upper side of the right base frame 7. Several scrapers 3081 are fixedly connected around the outer surface of the scraper roller 308. The third conveyor roller group 309 is rotatably connected to the middle of the right base frame 7. The take-up roller 310 is rotatably connected to the lower right side of the right base frame 7. The extension assembly includes a second carrier roller 301, etc. Figure 11 The diagram shows a central column 302, annular slider 303, annular roller 304, and annular plate 305. A second bearing roller 301 is rotatably connected to the left side of the upper side of the right base frame 7. A central column 302 is fixedly connected to the middle of the upper side of the right base frame 7. An annular slider 303 is slidably connected to the front end and rear end of the outer surface of the central column 302. A connection is fixed between the two annular sliders 303. Figure 10 The annular roller 304 shown has a first groove 3021 on the right side of the central column 302 and a second groove 3041 on the right side. An annular plate 305 is fixedly connected to the rear end of the annular roller 304. Several tooth grooves corresponding to the spur gear 307 are formed around the outer surface of the annular plate 305. The spur gear 307 meshes with the tooth grooves of the annular plate 305.

[0064] An auxiliary unit 400 is provided on the central column 302; the auxiliary unit 400 includes elastic elements 401, an ejector plate 402, and a wiping assembly; several elastic elements 401 are fixedly connected to the first slot 3021 on the right side of the central column 302, and an ejector plate 402 is fixedly connected between the right ends of all elastic elements 401; a wiping assembly is connected to the right side of the upper side of the right base frame 7, and the wiping assembly is located between the surrounding scraper roller 308 and the third conveyor roller group 309. The wiping assembly includes, as follows: Figure 12 The transverse slide rail 403, spring slider 404, rubber rod 405, second drive motor 406, and cam 407 are shown. The right side of the upper part of the right base frame 7 is bolted to the transverse slide rail 403. The transverse slide rail 403 is located between the surrounding scraper roller 308 and the third conveying roller group 309. The upper side of the transverse slide rail 403 is connected to the spring slider 404. The left side of the spring slider 404 is fixed to the rubber rod 405. The left side of the rubber rod 405 is provided with several protruding strip structures. The rear part of the upper side of the transverse slide rail 403 is bolted to the second drive motor 406. The output shaft of the second drive motor 406 is fixed to the cam 407. The cam 407 is close to the rear end of the rubber rod 405.

[0065] A gravure printing process for decorative paper with multiple surface resistances includes the following steps:

[0066] The synthesis of silicone liquid involves adding olefin silicone oil, silicone oil, crosslinking agent, catalyst, and curing agent in a weight ratio of 25:1:30:0.1:0.2 into a feeding chamber and mixing them to obtain silicone liquid.

[0067] The silicone liquid coating process includes silicone liquid coating treatment and silicone film compaction treatment. The silicone liquid coating treatment involves spraying silicone liquid from the feeding chamber onto the back of the decorative paper substrate layer to form a silicone liquid protective layer. The silicone film compaction treatment involves drying and solidifying the silicone liquid coated on the back of the substrate layer into multiple sets of parallel silicone film layers, and then compacting the silicone film layers so that the long strips of silicone film layers are spliced ​​together to form a complete silicone film.

[0068] The substrate layer printing process includes pattern printing and protective layer coating. Pattern printing is performed by an ink printing unit on the substrate layer covered with a silicone film. Protective layer coating is performed by a protective layer roller coating unit to apply various protective layers to the substrate layer, improving the wear resistance, stain resistance, solvent resistance, and antibacterial properties of the finished decorative paper.

[0069] The silicone film removal process involves peeling off the silicone film from the back of the substrate layer of the decorative paper to obtain the finished decorative paper.

[0070] A gravure printing machine for multi-resistance decorative paper includes a roller conveyor unit 100, a laminating unit 200, a film-tearing unit 300, a left base frame 1, a lower fixed frame 2, a circulating liquid conveyor 3, an ink printing unit 4, a protective layer roller coating unit 5, a dryer 6, a right base frame 7, and a recycling bin 8. The lower fixed frame 2 is fixedly connected to the right side of the upper part of the left base frame 1. The circulating liquid conveyor 3 is fixedly connected to the inner side of the lower fixed frame 2. The circulating liquid conveyor 3 consists of a water storage tank 31 and a water pump 32. A [missing information - likely a device or equipment] is placed on the right side of the left base frame 1. Ink printing unit 4; a protective layer roller coating unit 5 is placed on the right side of ink printing unit 4; a dryer 6 is fixed to the upper right side of the protective layer roller coating unit 5; a right base frame 7 is placed on the right side of the protective layer roller coating unit 5; a recycling box 8 is fixed to the upper right side of the right base frame 7; a roller conveying unit 100 is connected between the left base frame 1 and the lower fixed frame 2; a film coating unit 200 is connected to the upper side of the lower fixed frame 2; the film coating unit 200 is connected to the circulating liquid conveyor 3; a film peeling unit 300 is connected to the right base frame 7.

[0071] The roller conveying unit 100 includes a feeding roller 101, a first conveying roller group 102, a first carrying roller 103, a coating roller 104, and a second conveying roller group 105. The feeding roller 101 is rotatably connected to the lower left side of the left base frame 1. The first conveying roller group 102 is rotatably connected to the upper left side of the left base frame 1. The first carrying roller 103 is rotatably connected to the left side of the upper part of the lower fixing frame 2. The coating roller 104 is rotatably connected to the middle side of the upper part of the lower fixing frame 2. Several first liquid guiding grooves 1041 are transversely opened around the outer surface of the coating roller 104. A second liquid guiding groove 1042 is opened in the middle of each first liquid guiding groove 1041 around the coating roller 104. The second conveying roller group 105 is rotatably connected to the right side of the upper part of the lower fixing frame 2. The coating unit 200 is connected to the upper side of the lower fixing frame 2.

[0072] The coating unit 200 includes an upper fixing frame 201, a feeding chamber 202, a conveying pipe 203, a hot air blower 204, a collection hopper 205, a transfer pipe 206, and a dryer 207; the upper fixing frame 201 is bolted to the upper side of the lower fixing frame 2; the lower right side of the upper fixing frame 201 is coaxial with the coating roller 104; the feeding chamber 202 is bolted to the upper side of the upper fixing frame 201; the conveying pipe 203 is connected to the lower side of the feeding chamber 202; the conveying pipe 203 is connected to the lower side of the feeding chamber 202; the conveying pipe 203 is connected to the lower side of the feeding chamber 202; the conveying pipe 203 is connected to the lower side of the feeding chamber 201; the conveying pipe 203 is connected to the lower side of the feeding chamber 201; the conveying pipe 203 is connected to the lower side of the feeding chamber 201; the conveying pipe 203 is connected to the lower side of the feeding chamber 201; the conveying pipe 204 ... The feed pipe 203 is inserted into the lower fixed frame 2; a hot air blower 204 is bolted to the middle of the lower side of the upper fixed frame 201; a collection hopper 205 is bolted to the right side of the lower side of the upper fixed frame 201; a transfer pipe 206 is fixed to the lower side of the upper fixed frame 201; the front and rear ends of the transfer pipe 206 are respectively connected to the circulating liquid conveyor 3; the lower side of the collection hopper 205 is connected to the transfer pipe 206; a dryer 207 is fixed to the right side of the upper fixed frame 201. The dryer 207 uses an infrared heater; the elastic element 401 uses a spring telescopic rod.

[0073] The film-tearing unit 300 includes a second carrying roller 301, a central column 302, an annular slider 303, an annular roller 304, an annular plate 305, a first drive motor 306, a spur gear 307, a scraper roller 308, a scraper 3081, a third conveying roller group 309, and a take-up roller 310; the second carrying roller 301 is rotatably connected to the left side of the upper side of the right base frame 7; the central column 302 is fixedly connected to the middle of the upper side of the right base frame 7; an annular slider 303 is slidably connected to the front end and the rear end of the outer surface of the central column 302; an annular roller 304 is fixedly connected between the two annular sliders 303; a first groove 3021 is opened on the right side of the central column 302; the annular roller 304... A second slot 3041 is provided on the right side; an annular plate 305 is fixedly connected to the rear end of the annular roller 304; a first drive motor 306 is bolted to the middle of the rear side of the right base frame 7; a spur gear 307 is fixedly connected to the output shaft of the first drive motor 306; several tooth grooves corresponding to the spur gear 307 are provided around the outer surface of the annular plate 305; the spur gear 307 meshes with the tooth grooves of the annular plate 305; a scraper roller 308 is rotatably connected to the right side of the upper side of the right base frame 7; several scraper blades 3081 are fixedly connected around the outer surface of the scraper roller 308; a third conveying roller group 309 is rotatably connected to the middle of the right base frame 7; a take-up roller 310 is rotatably connected to the lower right side of the right base frame 7.

[0074] It also includes an auxiliary unit 400, which is provided on the central column 302. The auxiliary unit 400 includes an elastic element 401, an ejector plate 402, and an erasing assembly. Several elastic elements 401 are fixedly connected to the first slot 3021 on the right side of the central column 302. An ejector plate 402 is fixedly connected between the right ends of all elastic elements 401. An erasing assembly is connected to the right side of the upper side of the right base frame 7. The erasing assembly is located between the surrounding scraper roller 308 and the third conveyor roller group 309.

[0075] The erasing assembly includes a transverse slide rail 403, a spring slider 404, a rubber rod 405, a second drive motor 406, and a cam 407. The transverse slide rail 403 is bolted to the right side of the upper side of the right base frame 7. The transverse slide rail 403 is located between the surrounding scraper roller 308 and the third conveying roller group 309. The spring slider 404 is connected to the upper side of the transverse slide rail 403. The rubber rod 405 is fixed to the left side of the spring slider 404. Several protruding strip structures are provided on the left side of the rubber rod 405. The second drive motor 406 is bolted to the rear side of the upper side of the transverse slide rail. The output shaft of the second drive motor 406 is fixed to the cam 407. The cam 407 is close to the rear end of the rubber rod 405.

[0076] First, the roll-shaped substrate layer 9 for producing decorative paper is hung on the winding roller 101. The first end of the substrate layer 9 is pulled out and passed between the two rollers of the first conveying roller group 102. Then, it passes to the right around the upper surface of the first carrier roller 103 and the lower surface of the coating roller 104. It then passes between the two rollers of the second conveying roller group 105. Next, it passes around the various conveying rollers and working rollers in the ink printing unit 4, the protective layer roller coating unit 5, and the dryer 6. Finally, it passes around the upper surface of the second carrier roller 301 and the upper surface of the annular roller 304. It then passes between the right side of the annular roller 304 and the scraper roller 308 and between the two rollers of the third conveying roller group 309, and is wound onto the take-up roller 310, completing the pre-arrangement of the substrate layer 9. Then, the olefin silicone oil, silicone oil, crosslinking agent, catalyst, and curing agent prepared in proportion are poured into the feeding chamber 202 and stirred to obtain silicone liquid 91, completing the pre-treatment work before processing the substrate layer 9.

[0077] Then, the first conveyor roller group 102, the second conveyor roller group 105 and the third conveyor roller group 309, as well as the conveyor rollers in the ink printing unit 4, the protective layer roller coating unit 5 and the dryer 6, simultaneously carry out the rightward transmission of the substrate layer 9, so that each area of ​​the substrate layer 9 is released from the winding roller 101 in the above order and is wound up on the take-up roller 310, thus completing the transmission of the substrate layer 9.

[0078] During the process of conveying the substrate layer 9 to the right, the feed pipe 203 slowly sprays the silicone liquid 91 in the feeding chamber 202 onto the coating roller 104. The coating roller 104 rotates counterclockwise at the angle shown in the front view. The silicone liquid 91 flows along the first guide groove 1041 and the second guide groove 1042 located on the left side of the coating roller 104 to the upper surface of the substrate layer 9. The silicone liquid 91 flowing down along the first guide groove 1041 of the coating roller 104 covers the upper surface of the substrate layer 9 and solidifies to form the bottom layer of the silicone film 92. The silicone liquid 91 flowing down along the second guide groove 1042 of the coating roller 104 covers the bottom layer of the silicone film 92 and solidifies to form the upper reinforcing layer of the silicone film 92. The bottom layer of each group of silicone films 92 and the upper reinforcing layer of the same group of silicone films 92 respectively form a group of silicone film 92 layers. As the silicone liquid 91 continuously covers the substrate layer, the silicone film 92 continues to form a layer of silicone film 92. On the upper surface of the substrate layer 9, each group of silicone film 92 layers is stretched into a long strip. As the substrate layer 9 moves to the right and passes between the two rollers of the second conveying roller group 105, the two rollers of the second conveying roller group 105 compact each group of long silicone film 92 layers, so that the compacted silicone film 92 layers are spliced ​​into a complete silicone film 92. The upper surface of each group of silicone film 92 layers is an upward arched arc surface, which ensures that it provides sufficient tensile strength to the substrate layer 9 and completes the silicone film 92 coating work on the back of the substrate layer 9. This achieves the goal of ensuring sufficient tensile strength to the substrate layer 9 while reducing the amount of silicone liquid 91 used and reducing the cost of silicone liquid 91 raw materials. In the subsequent silicone film 92 removal process, grouping and tearing helps to improve the tearing speed and tearing effect of the silicone film 92.

[0079] As the laminating roller 104 introduces the silicone liquid 91 onto the upper surface of the substrate layer 9, any remaining silicone liquid 91 on its surface continues to rotate with the roller. Simultaneously, the hot air blower 204 delivers hot air to the lower right, causing the remaining silicone liquid 91 on the surface of the laminating roller 104 to be blown away to the right and fall into the collection hopper 205. This prevents a large amount of silicone liquid 91 from remaining on the surface of the laminating roller 104 and solidifying as it dries, thus avoiding blockage of the first and second liquid guide channels 1041 and 1042. This ensures that the silicone film 92 covering the back of the substrate layer 9 has a uniform consistency. The silica gel liquid 91 is completely dissolved, preventing it from condensing and causing blockage. Meanwhile, the water pump 32 in the circulating liquid conveyor 3 delivers circulating liquid into the transfer pipe 206 through a pipe. The circulating liquid then flows back to the water tank 31 of the circulating liquid conveyor 3 through another pipe, forming a circulating return liquid between the circulating liquid conveyor 3 and the transfer pipe 206. This dissolves the silica gel liquid 91 that has entered the transfer pipe 206, preventing it from condensing and causing blockage. At the same time, the dryer 207 dries the silica gel liquid 91 covering the upper surface of the substrate layer 9, causing it to solidify quickly and form a silica gel film 92, thus completing the treatment of the silica gel liquid 91.

[0080] Next, the area of ​​the substrate layer 9 that has completed the silicone film 92 covering work continues to move to the right, passing through the various conveyor rollers and working rollers in the ink printing unit 4 to complete the pattern printing work on the lower surface of the substrate layer 9. Subsequently, the area of ​​the substrate layer 9 that has completed the pattern printing work continues to move to the right, passing through the various conveyor rollers and working rollers in the protective layer roller coating unit 5 to complete the coating work of various protective layers on the lower surface of the substrate layer 9, improving the wear resistance, pollution resistance, solvent resistance and antibacterial properties of the finished decorative paper, and completing the pattern printing work and various protective layer coating work of the substrate layer 9.

[0081] Afterwards, the area of ​​the substrate layer 9 where the protective layer coating has been applied continues to move to the right. Simultaneously, the output shaft of the first drive motor 306 drives the spur gear 307 to rotate. The spur gear 307 meshes with the tooth groove of the annular plate 305, driving the annular roller 304 and the annular slider 303 to rotate clockwise around the axis of the central column 302 from the perspective of the front view. During the passage of the substrate layer 9 through the annular roller 304 and the scraper roller 308, the clockwise rotating scraper roller 308 scrapes away the silicone film 92 covering the surface of the substrate layer 9 using the scraper plate 3081. Since the silicone film 92 consists of multiple sets of long strip-shaped silicone film layers 92, each set of silicone film layers 92 is scraped upwards by the scraper plate 3081, and each set of silicone film layers 92 is subjected to… The force applied to the scraper 3081 is relatively consistent, avoiding uneven force and local tearing of the silicone film 92 during tearing, thus improving the tearing efficiency of the silicone film 92. Finally, the area of ​​the substrate layer 9 where the silicone film 92 has been removed is wound onto the take-up roller 310, and the torn silicone film 92 is flung to the right by the scraper roller 308 into the recycling bin 8, completing the rapid removal of the silicone film 92 from the substrate layer 9. This ensures that the silicone film 92 on the back of the substrate layer 9 is removed promptly after the pattern printing and multiple protective layer coating processes are completed, preventing the silicone film 92 from solidifying on the substrate layer 9 for a long time, which would increase the thickness of the substrate layer 9 and make it difficult to remove the silicone film 92 later.

[0082] During the scraping process of the scraper roller 308 and scraper 3081 to remove the silicone film 92 covering the surface of the substrate layer 9, the ejector plate 402 first pushes a small portion of the substrate layer 9, which is tightly attached to the surface of the annular roller 304, to the right, causing the silicone film 92 on the ejected area of ​​the substrate layer 9 to bulge to the right, thus improving the scraping effect of the scraper 3081 on the silicone film 92. Then, the rotating annular roller 304 pushes the ejector plate 402, causing the elastic element 401 to compress to the left. The ejector plate 402 is pushed into the interior of the annular roller 304, and at the same time, the annular roller 304... Roller 304 continues to convey the substrate layer 9 towards scraper roller 308, causing scraper 3081 to tear off the silicone film 92. When the second groove 3041 of the annular roller 304 aligns with the ejector plate 402, the compressed elastic element 401 drives the ejector plate 402 to pop out to the right and reset. Then, the above steps are repeated, and the ejector plate 402 reciprocates to push the substrate layer 9 to the right, improving the tearing efficiency of the silicone film 92, reducing the amount of silicone film 92 residue on the substrate layer 9, and efficiently completing the removal of the silicone film 92 from the substrate layer 9.

[0083] During the process of removing the silicone film 92 from the substrate layer 9, the output shaft of the second drive motor 406 drives the cam 407 to rotate as it passes the rubber rod 405. The cam 407 drives the spring slider 404 to move back and forth along the transverse slide rail 403. This causes the spring slider 404 to drive the convex structure of the rubber rod 405 to rub against the upper surface of the substrate layer 9. The convex structure of the rubber rod 405 applies a transverse cleaning force to the silicone film 92 debris remaining on the upper surface of the substrate layer 9, thus completing the removal of the silicone film 92 debris remaining on the upper surface of the substrate layer 9. This ultimately solves the technical problem that the relatively soft and thin substrate layer, due to its poor resistance to deformation, is not easy to directly stretch and extend for pattern printing and protective layer coating, which affects the service life and aesthetics of the finished decorative paper.

[0084] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A surface multi-resistant decor paper intaglio printing apparatus, characterized in that: The utility model provides a kind of printing machine, including left part chassis (1), lower part fixed frame (2), circulating liquid conveyor (3), ink printing unit (4), protective layer roller coating unit (5), drying machine (6), right part chassis (7) and recycling tank (8);The right part of the upper side of left part chassis (1) is fixed with lower part fixed frame (2), and the inner side of lower part fixed frame (2) is fixed with circulating liquid conveyor (3);Circulating liquid conveyor (3) is composed of water storage tank (31) and water pump machine (32);The right side of left part chassis (1) is placed with ink printing unit (4), and the right side of ink printing unit (4) is placed with protective layer roller coating unit (5), and the upper side of the right side of protective layer roller coating unit (5) is fixed with drying machine (6), and the right side of protective layer roller coating unit (5) is placed with right part chassis (7), and the upper side of the right side of right part chassis (7) is fixed with recycling tank (8);Roller conveying unit (100) for conveying substrate layer (9) is connected between left part chassis (1) and lower part fixed frame (2), the upper side of lower part fixed frame (2) is connected with film coating unit (200) for forming silica gel layer on the back of substrate layer (9), film coating unit (200) is connected with circulating liquid conveyor (3), and film tearing unit (300) for tearing off silica gel layer on the back of substrate layer (9) is connected on right part chassis (7);Silica gel liquid is added in the charging cabin (202) of film coating unit (200).

2. The surface multi-resistant decorative paper intaglio printing apparatus according to claim 1, characterized in that: The roller conveying unit (100) includes roll conveying roller (101), first conveying roller group (102), first bearing roller (103), film coating roller (104) and second conveying roller group (105);The lower part of the left side of left part chassis (1) is rotatably connected with roll conveying roller (101), the upper part of the left side of left part chassis (1) is rotatably connected with first conveying roller group (102), the left side of the upper part of lower part fixed frame (2) is rotatably connected with first bearing roller (103), the middle side of the upper part of lower part fixed frame (2) is rotatably connected with film coating roller (104), a plurality of first liquid guide grooves (1041) are horizontally arranged around the outer surface of film coating roller (104), a second liquid guide groove (1042) is arranged in each first liquid guide groove (1041) of film coating roller (104), the right side of the upper part of lower part fixed frame (2) is rotatably connected with second conveying roller group (105), and the upper side of lower part fixed frame (2) is connected with film coating unit (200).

3. The surface multi-resistant decorative paper intaglio printing apparatus according to claim 2, characterized in that: The film coating unit (200) comprises an upper fixing frame (201), a feeding cabin (202), a feeding pipe (203), a hot air machine (204), a collecting hopper (205), a transfer pipeline (206) and a dryer (207); the upper side of the lower fixing frame (2) is fixedly connected with the upper fixing frame (201), the right part of the lower side of the upper fixing frame (201) is coaxial with the film coating roller (104), the upper side of the upper fixing frame (201) is fixedly connected with the feeding cabin (202), the lower side of the feeding cabin (202) is connected with the feeding pipe (203), the feeding pipe (203) is inserted into the lower fixing frame (2), the middle part of the lower side of the upper fixing frame (201) is fixedly connected with the hot air machine (204), the right part of the lower side of the upper fixing frame (201) is fixedly connected with the collecting hopper (205), the lower side of the upper fixing frame (201) is fixedly connected with the transfer pipeline (206), the front end and the rear end of the transfer pipeline (206) are respectively connected with the circulating liquid conveyor (3) through pipelines, the lower side of the collecting hopper (205) is connected with the transfer pipeline (206), the water pump machine (32) in the circulating liquid conveyor (3) conveys circulating liquid into the transfer pipeline (206) through a pipeline, the circulating liquid conveyed into the transfer pipeline (206) flows back into the water storage tank (31) in the circulating liquid conveyor (3) through another pipeline, so that the circulating liquid conveyor (3) and the transfer pipeline (206) form a circulating backflow liquid, the silica gel liquid (91) entering the transfer pipeline (206) is dissolved, and the right side of the upper fixing frame (201) is fixedly connected with the dryer (207).

4. The surface multi-resistant decorative paper gravure printing apparatus according to claim 1, characterized in that: The film tearing unit (300) comprises a stretching assembly, a first driving motor (306), a straight gear (307), a scraping roller (308), a scraping plate (3081), a third conveying roller group (309) and a winding roller (310); the middle part of the rear side of the right part of the chassis (7) is fixedly connected with the first driving motor (306), the output shaft of the first driving motor (306) is fixedly connected with the straight gear (307), the straight gear (307) is connected with the stretching assembly, the right part of the upper side of the right part of the chassis (7) is rotatably connected with the scraping roller (308), the outer surface of the scraping roller (308) is fixedly connected with a plurality of scraping plates (3081), the middle part of the right part of the chassis (7) is rotatably connected with the third conveying roller group (309), and the lower part of the right side of the right part of the chassis (7) is rotatably connected with the winding roller (310).

5. The surface multi-resistant decorative paper intaglio printing apparatus according to claim 4, characterized in that: The stretching assembly comprises a second bearing roller (301), a center column (302), an annular slider (303), an annular roller (304) and an annular plate (305); the left part of the upper side of the right chassis (7) is rotatably connected with the second bearing roller (301); the middle part of the upper side of the right chassis (7) is fixedly connected with the center column (302); one annular slider (303) is slidably connected with the front end of the outer surface of the center column (302) and the rear end of the outer surface of the center column (302); the annular roller (304) is fixedly connected between the two annular sliders (303); the right side of the center column (302) is provided with a first slot (3021); the right side of the annular roller (304) is provided with a second slot (3041); the rear end of the annular roller (304) is fixedly connected with the annular plate (305); a plurality of tooth grooves corresponding to the spur gear (307) are formed around the outer surface of the annular plate (305); and the spur gear (307) is engaged with the tooth grooves of the annular plate (305).

6. The surface multi-resistant decorative paper intaglio printing apparatus according to claim 5, characterized in that: The center column (302) is provided with an auxiliary unit (400); the auxiliary unit (400) comprises elastic members (401), an ejection plate (402) and an erasing assembly; a plurality of elastic members (401) are fixedly connected to the first slot (3021) on the right side of the center column (302); the right ends of all the elastic members (401) are fixedly connected with the ejection plate (402); the right part of the upper side of the right chassis (7) is connected with the erasing assembly; and the erasing assembly is located between the scraping roller (308) and the third conveying roller group (309).

7. The surface multi-resistant decorative paper intaglio printing apparatus according to claim 6, characterized in that: The erasing assembly comprises a transverse sliding rail (403), a spring sliding block (404), a rubber rod (405), a second driving motor (406) and a cam (407); the right part of the upper side of the right chassis (7) is boltedly connected with the transverse sliding rail (403); the transverse sliding rail (403) is located between the scraping roller (308) and the third conveying roller group (309); the upper side of the transverse sliding rail (403) is connected with the spring sliding block (404); the left side of the spring sliding block (404) is fixedly connected with the rubber rod (405); a plurality of convex structures are arranged on the left side of the rubber rod (405); the rear part of the upper side of the transverse sliding rail (403) is boltedly connected with the second driving motor (406); the output shaft of the second driving motor (406) is fixedly connected with the cam (407); and the cam (407) is tightly attached to the rear end of the rubber rod (405).

Images