Intaglio printing device and wood grain decorative paper printing process

Abstract

The invention relates to the technical field of intaglio printing, in particular to an intaglio printing device and a wood grain decorative paper printing technology.The intaglio printing device comprises a machine body, a wood grain intaglio roller is rotationally installed on the machine body, a balance weight roller is slidably inserted in the position, located above the wood grain intaglio roller, of the machine body, and an ink box is arranged below the wood grain intaglio roller; a scraper is fixedly installed on the ink box, a displacement assembly is arranged on the ink box and located below the scraper, and a material collecting assembly used for cleaning the scraper is arranged on the displacement assembly. By arranging the material collecting assembly capable of moving in a reciprocating mode, ink condensate on the scraper is cleaned and collected, the abrasion condition of the scraper can be detected while the scraper is cleaned each time, and when the abrasion condition of the scraper can affect cleaning of the blank surface of the wood grain gravure roller through the scraper, the system can detect information at the first time, and the work efficiency is improved. And the scraper can be conveniently replaced in time, and printing ink which is not cleaned is prevented from polluting printing decorative paper.

Description

Technical Field

[0001] The invention relates to the technical field of gravure printing, and in particular to a gravure printing device and a wood grain decorative paper printing process. Background Art

[0002] A gravure printing press is a printing device that uses a gravure plate as a printing plate. The image and text part of the printing plate is concave, while the blank part remains in the same plane as the outer circle of the printing plate cylinder. During the printing process, ink is filled in the concave part of the gravure plate, and the excess ink is scraped off from the plate surface by a scraper, leaving only the ink in the concave part. The ink is then transferred to the substrate to achieve the printing effect; while wood grain decorative paper is a decorative material with paper as the base material and a wood grain pattern printed on the surface; when a gravure printing press is used to print wood grain decorative paper, since the scraper needs to contact the gravure roller for a long time and scrape off excess ink, if the scraper is exposed to the air for a long time, the ink on it is easy to condense, which in turn affects the cleaning effect of the scraper on the gravure roller, thereby reducing the printing quality of the wood grain decorative paper. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the present invention provides a gravure printing device and a wood grain decorative paper printing process, which can effectively solve the problem that the scraper is exposed to the air for a long time, the ink on it is easy to condense, and thus affect the cleaning effect of the scraper on the gravure roller.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a gravure printing device, comprising a machine body, a wood-grain gravure roller is rotatably mounted on the machine body, a weight roller is slidably inserted on the machine body and located above the wood-grain gravure roller, an ink box is arranged below the wood-grain gravure roller, a scraper is fixedly mounted on the ink box, a displacement component is arranged on the ink box and located below the scraper, and a material collecting component for cleaning the scraper is arranged on the displacement component; The aggregate assembly includes an aggregate trough, a sliding block is slidably installed in the aggregate trough, a trapezoidal block is fixedly installed on the sliding block, a fixing groove is opened on the top of the trapezoidal block, a spring a is fixedly connected in the fixing groove, a detection block is fixedly installed on the end of the spring a, and an electric sensitive part is fixedly installed in the fixing groove.

[0005] Furthermore, sliding grooves are provided on both sides of the aggregate trough, a spring b is fixedly installed in the sliding groove, a sliding rod is fixedly installed on the end of the spring b, and a limiting plate is fixedly installed on the end of the sliding rod.

[0006] Furthermore, a telescopic rod is fixedly mounted on one side of the limiting plate, a push plate is fixedly mounted on the telescopic end of the telescopic rod, and a connecting rod is fixedly connected to one side of the push plate.

[0007] Furthermore, two groups of positioning grooves are symmetrically provided on the sliding block, a spring c is fixedly installed in the positioning groove, and the end of the spring c is fixedly connected to a magnetic block.

[0008] Furthermore, two groups of push rods are symmetrically fixedly mounted on the machine body, and a through hole is opened on the limit plate.

[0009] Furthermore, a guide roller is provided on the machine body and located on one side of the wood grain gravure roller, support rods a are rotatably installed at both ends of the guide roller, a slide groove is opened on the machine body, the end of the support rod a is slidably inserted in the slide groove, a support seat is fixedly installed on the machine body, a coil spring is fixedly installed on the support seat, a connecting block is fixedly connected to the coil spring, and the connecting block is fixedly sleeved on the support rod a, an electrostatic adsorption roller is slidably installed on the machine body, and the electrostatic adsorption roller is located above the guide roller.

[0010] Furthermore, a dryer is arranged on the machine body and located on the other side of the wood grain gravure roller, a winding roller is arranged on one side of the dryer, and a pressure roller is slidably mounted on the machine body, and the pressure roller is located above the winding roller.

[0011] A wood grain decorative paper printing process using a gravure printing device, comprising: S: Pass the end of the decorative paper through the guide roller and the electrostatic adsorption roller, between the wood grain gravure roller and the counterweight roller, and the connecting port of the dryer, and then pass through the winding roller and the pressure roller, and then fix it on the winding roller; S: When the winding roller is winding the decorative paper, the weighted roller presses the decorative paper against the wood grain gravure roller, so that the concave wood grain pattern with ink on the wood grain gravure roller is printed on the decorative paper; S: During the printing process, the scraper removes the ink on the surface of the wood-grain gravure roller, the displacement assembly controls the aggregate assembly to move along the bottom surface of the scraper, the aggregate assembly cleans the ink condensate on the scraper, and monitors the degree of wear of the scraper in real time. Beneficial Effects

[0012] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects: The present invention cleans and collects ink condensate on the scraper by arranging a reciprocating collection component, and can also detect the wear of the scraper during each round of cleaning of the scraper. When the wear of the scraper affects the cleaning of the blank surface of the wood grain gravure roller by the scraper, the system can detect the information at the first time, so as to facilitate timely replacement of the scraper and avoid contamination of the decorative paper being printed by uncleaned ink. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 It is a schematic diagram of the side structure of the aggregate trough of the present invention; Figure 5 It is a schematic structural diagram of the aggregate assembly of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the aggregate assembly of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle; Figure 8 This is a state diagram of the push plate of the present invention when squeezing ink coagulation; Fig. 9 This is a state diagram of pouring the ink condensate according to the present invention. Attached photos

[0015] 1. Machine body; 101. Slideway; 2. Guide roller; 201. Support rod a; 202. Support seat; 203. Coil spring; 204. Connecting block; 205. Electrostatic adsorption roller; 3. Wood grain gravure roller; 301. Counterweight roller; 302. Ink cartridge; 303. Scraper; 304. Displacement assembly; 305. Aggregate assembly; 3051. Aggregate trough; 3052. Sliding block; 3053. Trapezoidal block; 3054. Limiting plate; 3055. Telescopic rod; 3056. Push plate; 3057. Connecting rod; 3058. Sliding rod; 3059. Push rod; 306. Detection block; 307. Electrically sensitive component; 308. Filter; 4. Dryer; 5. Winding roller; 501. Pressing roller. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] The present invention will be further described below in conjunction with the embodiments.

[0018] Example: Refer to the attached Figure 1 —Attachment Figure 7 As shown, a gravure printing device includes a body 1, on which a wood grain gravure roller 3 is rotatably mounted, and on which a groove of a wood grain pattern to be printed is arranged, and a counterweight roller 301 is slidably inserted on the body 1 and located above the wood grain gravure roller 3. The counterweight roller 301 presses down a decorative paper by its own weight, and presses part of the decorative paper into the groove of the counterweight roller 301, thereby forming a wood grain pattern on the decorative paper.

[0019] An ink cartridge 302 is provided below the wood grain gravure roller 3. The ink cartridge 302 is filled with printing ink. A scraper 303 is fixedly mounted on the ink cartridge 302. The scraper 303 scrapes off the ink from the blank area on the surface of the wood grain gravure roller 3 except the grooves. A displacement assembly 304 is provided on the ink cartridge 302 and below the scraper 303. A collection assembly 305 for cleaning the scraper 303 is provided on the displacement assembly 304. The displacement assembly 304 drives the collection assembly 305 to move back and forth along the edge of the scraper 303.

[0020] The collecting assembly 305 includes a collecting trough 3051, into which the ink and the condensate scraped off from the scraper 303 are introduced. Figure 4 —Attachment Figure 5 , attached Figure 5 To be close to the displacement assembly 304 , a filter screen 308 is provided on one side of the collecting trough 3051 close to the displacement assembly 304 . Fine ink can still pass through the filter screen 308 and fall back into the ink cartridge 302 , while condensate will remain in the collecting trough 3051 .

[0021] A sliding block 3052 is slidably installed in the aggregate trough 3051, and a trapezoidal block 3053 is fixedly installed on the sliding block 3052. The sliding block 3052 supports the trapezoidal block 3053 to slide back and forth in the aggregate trough 3051. The cross-section of the trapezoidal block 3053 is trapezoidal. The two inclined surfaces of the trapezoidal block 3053 will scrape off the condensate on the scraper 303 and guide the condensate into the aggregate trough 3051.

[0022] The scraper 303 will be worn out due to long-term scraping of condensation, and thus cannot completely adhere to the surface of the wood grain gravure roller 3 to completely scrape off the ink on the blank surface of the wood grain gravure roller 3, which will have a certain impact on the wood grain printing of the decorative paper and reduce the quality of the wood grain printing.

[0023] Specifically, a fixing groove is provided on the top of the trapezoidal block 3053, in which a spring a is fixedly connected, and a detection block 306 is fixedly installed on the end of the spring a. When the detection block 306 is close to the scraper 303 with an intact surface, the detection block 306 and the trapezoidal block 3053 are maintained in the same plane, and an electric sensitive component 307 is fixedly installed in the fixing groove. The detection block 306 fits tightly with the electric sensitive component 307. When the scraper 303 is severely worn, the spring a partially pushes the detection block 306 out of the fixing groove according to the degree of wear, and the detection block 306 moves, and the connection between the detection block 306 and the electric sensitive component 307 is disconnected. The electric sensitive component 307 sends a warning to the system that the scraper 303 needs to be repaired and updated, so as to avoid the problem of poor printing quality of the roll of decorative paper due to failure to timely detect the wear of the scraper 303.

[0024] Furthermore, sliding grooves are provided on both sides of the aggregate trough 3051, and a spring b is fixedly installed in the sliding groove. The spring b is a tension spring. A sliding rod 3058 is fixedly installed on the end of the spring b. The sliding rod 3058 is retractable. A limiting plate 3054 is fixedly installed on the end of the sliding rod 3058. The spring b uses the sliding rod 3058 to tightly fit the limiting plate 3054 to the side of the aggregate trough 3051.

[0025] A telescopic rod 3055 is fixedly installed on one side of the limit plate 3054, and a tension spring is arranged inside the telescopic rod 3055 for keeping the telescopic end of the telescopic rod 3055 in a retracted state at all times in the absence of external force. A push plate 3056 is fixedly installed at the telescopic end of the telescopic rod 3055, and the push plate 3056 prevents the condensate from falling into the ink box 302 during the movement of the collecting trough 3051, thereby preventing the condensate from being re-adhered to the wood grain gravure roller 3 along with the ink.

[0026] When the displacement assembly 304 drives the material collection assembly 305 to move to one end of the scraper 303, the condensate in the material collection tank 3051 can be cleaned. Figure 8 A through hole is provided on the limit plate 3054, and two sets of push rods 3059 are symmetrically fixedly installed on the body 1. The ends of the push rods 3059 are suction cups. The collecting trough 3051 moves to the left. When the displacement assembly 304 moves to the end, the push rods 3059 will be inserted into the collecting trough 3051 through the through hole, adsorbed on the side of the push plate 3056 on the left, and continue to push the push plate 3056 into the collecting trough 3051. The push plate 3056 and the sliding block 3052 together collect the condensate between the two, squeeze the ink attached thereto, and compress the collected condensate into blocks.

[0027] Furthermore, two groups of positioning grooves are symmetrically provided on the sliding block 3052, and springs c are fixedly installed in the positioning grooves. The ends of the springs c are fixedly connected to magnetic blocks. When there is no external force pressing, the surface of the magnetic blocks is flush with the surface of the sliding block 3052, so as to prevent the ink and its condensate from entering the positioning grooves. A connecting rod 3057 is fixedly connected to one side of the push plate 3056, and a strong magnetic block is provided at the end of the connecting rod 3057. When the connecting rod 3057 is pushed toward the sliding block 3052, it will be inserted into the positioning groove, and the strong magnetic block and the magnetic block will attract each other. In this process, the push plate 3056 pushes the ink and its condensate to concentrate toward the sliding block 3052, and at the same time, the ink and its condensate will also push the sliding block 3052 to slide, so that the sliding block 3052 and the push plates 3056 on both sides squeeze the condensate between them together, until Figure 8 The connecting rods 3057 on both sides shown in FIG. 3 are inserted into the positioning grooves.

[0028] Further, see the attached Fig. 9 When the displacement assembly 304 controls the collection trough 3051 to move in the reverse direction, the position of the push plate 3056 adsorbed by the push rod 3059 relative to the push rod 3059 remains unchanged, and the position of the sliding block 3052 relative to the push plate 3056 does not change due to the attraction between the strong magnetic block and the magnetic block, and the friction between the trapezoidal block 3053 and the scraper 303. In the process of continuous movement of the collection trough 3051, the push plate 3056 will eventually push the limit plate 3054 to move and separate from the end of the collection trough 3051, and the spring b is stretched. In this state, the movement of the collection trough 3051 will expose the space between the sliding block 3052 and the push plate 3056, which loses the support of the bottom of the collection trough 3051, so that the condensate between the two falls from the gap area, thereby achieving the purpose of cleaning the condensate in the collection trough 3051.

[0029] In the process of the winding roller 5 winding up the printed decorative paper, the surface tension of the decorative paper will change to be either tight or loose due to the process of unwinding and winding. A guide roller 2 is provided on the machine body 1 and located on one side of the wood grain gravure roller 3. The guide roller 2 supports the decorative paper that has just been fed. Support rods a201 are rotatably installed at both ends of the guide roller 2. A slide groove 101 is provided on the machine body 1. The end of the support rod a201 is slidably inserted in the slide groove 101. When the decorative paper is wound, its tension becomes stronger. The decorative paper will press down the guide roller 2, thereby reducing the inclination angle of the decorative paper from the guide roller 2 and the wood grain gravure roller 3, thereby reducing the surface tension pulling of the decorative paper.

[0030] On the contrary, when the surface tension of the decorative paper becomes weak, a support seat 202 is fixedly installed on the body 1, a coil spring 203 is fixedly installed on the support seat 202, a connecting block 204 is fixedly connected to the coil spring 203, and the connecting block 204 is fixedly sleeved on the support rod a201. The coil spring 203 pushes the support rod a201 to rise through the connecting block 204, and the support rod a201 with the decorative paper is attached to the electrostatic adsorption roller 205. The electrostatic adsorption roller 205 is slidably installed on the body 1, and the electrostatic adsorption roller 205 is located above the guide roller 2. The electrostatic adsorption roller 205 rotates with the movement of the decorative paper, and the electrostatic adsorption roller 205 removes dust and debris on the surface of the decorative paper to prevent the dust and debris from hindering the printing ink from adhering to the decorative paper.

[0031] Furthermore, a dryer 4 is provided on the machine body 1 and on the other side of the wood grain gravure roller 3. After the ink adheres to the decorative paper, the dryer 4 dries the area thereof to prevent the ink on the decorative paper from being printed on the rolled-up part of the decorative paper when the decorative paper is rolled up. A winding roller 5 is provided on one side of the dryer 4. The winding roller 5 winds up the decorative paper printed with wood grain. A pressure roller 501 is slidably installed on the machine body 1, and the pressure roller 501 is located above the winding roller 5. The pressure roller 501 is always closely attached to the top of the decorative paper to prevent the decorative paper from wrinkling during the rolling process.

[0032] A wood grain decorative paper printing process using a gravure printing device, comprising: S1: Pass the end of the decorative paper through between the guide roller 2 and the electrostatic adsorption roller 205, between the wood grain gravure roller 3 and the weight roller 301, and the connecting port of the dryer 4, and then pass through between the winding roller 5 and the pressure roller 501, and then fix and adhere to the winding roller 5; S2: When the winding roller 5 is winding the decorative paper, the weight roller 301 presses the decorative paper toward the wood grain gravure roller 3, so that the concave wood grain pattern with ink on the wood grain gravure roller 3 is printed on the decorative paper; S3: During the printing process, the scraper 303 removes the ink on the surface of the wood-grain gravure roller 3, and the displacement component 304 controls the collection component 305 to move along the bottom surface of the scraper 303. The collection component 305 cleans the ink condensate on the scraper 303 and monitors the degree of wear of the scraper 303 in real time.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gravure printing device, comprising a body (1), characterized in that: A wood grain gravure roller (3) is rotatably mounted on the machine body (1); a weight roller (301) is slidably inserted on the machine body (1) and located above the wood grain gravure roller (3); an ink box (302) is arranged below the wood grain gravure roller (3); a scraper (303) is fixedly mounted on the ink box (302); a displacement component (304) is arranged on the ink box (302) and located below the scraper (303); and a material collection component (305) for cleaning the scraper (303) is arranged on the displacement component (304); The material collection assembly (305) comprises a material collection trough (3051), a sliding block (3052) is slidably installed in the material collection trough (3051), a trapezoidal block (3053) is fixedly installed on the sliding block (3052), a fixing groove is provided on the top of the trapezoidal block (3053), a spring a is fixedly connected in the fixing groove, a detection block (306) is fixedly installed at the end of the spring a, and an electric sensitive component (307) is fixedly installed in the fixing groove.

2. A gravure printing device according to claim 1, characterized in that: Sliding grooves are provided on both sides of the material collecting groove (3051), a spring b is fixedly installed in the sliding groove, a sliding rod (3058) is fixedly installed at the end of the spring b, and a limiting plate (3054) is fixedly installed at the end of the sliding rod (3058).

3. A gravure printing device according to claim 2, characterized in that: A telescopic rod (3055) is fixedly mounted on one side of the limit plate (3054), a push plate (3056) is fixedly mounted on the telescopic end of the telescopic rod (3055), and a connecting rod (3057) is fixedly connected to one side of the push plate (3056).

4. A gravure printing device according to claim 3, characterized in that: The sliding block (3052) is symmetrically provided with two groups of positioning grooves, in which springs c are fixedly installed, and the ends of the springs c are fixedly connected to magnetic blocks.

5. The gravure printing device according to claim 4, characterized in that: Two groups of push rods (3059) are symmetrically fixedly mounted on the machine body (1), and a through hole is provided on the limit plate (3054).

6. The gravure printing device according to claim 5, characterized in that: A guide roller (2) is arranged on the machine body (1) and located on one side of the wood grain gravure roller (3); support rods a (201) are rotatably mounted on both ends of the guide roller (2); a slide groove (101) is provided on the machine body (1); the end of the support rod a (201) is slidably inserted into the slide groove (101); a support seat (202) is fixedly mounted on the machine body (1); a coil spring (203) is fixedly mounted on the support seat (202); a connecting block (204) is fixedly connected to the coil spring (203); the connecting block (204) is fixedly sleeved on the support rod a (201); an electrostatic adsorption roller (205) is slidably mounted on the machine body (1); and the electrostatic adsorption roller (205) is located above the guide roller (2).

7. The gravure printing device according to claim 6, characterized in that: A dryer (4) is arranged on the machine body (1) and located on the other side of the wood grain gravure roller (3); a winding roller (5) is arranged on one side of the dryer (4); a pressing roller (501) is slidably mounted on the machine body (1), and the pressing roller (501) is located above the winding roller (5).

8. A wood grain decorative paper printing process using a gravure printing device, applied to a gravure printing device as claimed in any one of claims 1 to 7, characterized in that: include: S1: passing the end of the decorative paper through between the guide roller (2) and the electrostatic adsorption roller (205), between the wood grain gravure roller (3) and the counterweight roller (301), and through the connecting port of the dryer (4), and then passing between the winding roller (5) and the pressure roller (501), and then fixedly adhering to the winding roller (5); S2: When the reeling roller (5) is reeling up the decorative paper, the weighted roller (301) presses the decorative paper against the wood grain gravure roller (3), so that the concave wood grain pattern with ink on the wood grain gravure roller (3) is imprinted on the decorative paper; S3: During the printing process, the scraper (303) removes the ink on the surface of the wood-grain gravure roller (3), the displacement component (304) controls the collection component (305) to move along the bottom surface of the scraper (303), and the collection component (305) cleans the ink condensate on the scraper (303), while monitoring the degree of wear of the scraper (303) in real time.

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