A printing apparatus, a printing method and their application in specialty paper

Abstract

The application relates to a printing device, a printing method and application thereof in special paper, and belongs to the technical field of printing machines. The device comprises a warehouse cover, a paper conveying system, a printing plate cylinder piece, a surface characteristic detection unit and a pressure printing mechanism. The pressure printing mechanism is internally provided with a pressure cylinder structure and an edge material scraping structure. The pressure cylinder structure drives a first carrier plate and a second carrier plate to make opposite axial reciprocating motions through a driving assembly. The first carrier plate drives the pressure printing cylinder to move axially, and the second carrier plate drives a balance mass block to move reversely and synchronously to balance inertial force. An elastic buffering mechanism built in a pushing position component absorbs reversing impact. The edge material scraping structure adjusts the front and back positions of a scraper through a first motor, adjusts the inclination angle of the scraper through a second motor and a connecting rod mechanism, and realizes edge ink overflow scraping and inclined chamfer forming. The application can inhibit vibration, improve running stability, actively correct edge ink overflow, and comprehensively improve special paper printing quality and post-processing adaptability.

Description

Technical Field

[0001] This application relates to the technical field of printing machinery, and in particular to a printing device, a printing method and its application in specialty paper. Background Technology

[0002] Specialty papers, such as pearlescent paper, tactile paper, gold cardstock, silver cardstock, and embossed paper, are widely used in high-end packaging, labels, greeting cards, and brochures due to their unique surface textures and visual effects. However, the raised textures on specialty papers present challenges for printing: traditional printing equipment applies pressure perpendicular to the paper surface at the moment of printing, often making it difficult for ink to fully penetrate the sidewalls and recessed areas of the texture, resulting in quality problems such as uneven ink color, white showing in the texture, and insufficient three-dimensionality.

[0003] Currently, Chinese patent application number CN201710462580.X discloses a special paper printing equipment and process. The equipment includes a conveyor table with a first and second detection box on its surface. An ST1906 humidity sensor, a display, and an audible and visual alarm are installed on both the first and second detection boxes. A water tank is installed between the first and second detection boxes, and a first high-pressure pump is located on one side of the water tank. A water dispenser is installed at the bottom of the regulator. First hydraulic cylinders are connected to both sides of the bottom of the mounting base via first hydraulic rods. A printing plate is located on one side of the second detection box, and the top of the printing plate is connected to the top of a second hydraulic rod via a connecting rod. The second hydraulic cylinder is mounted on the top of a second base, and an ink tank and a second high-pressure pump are also located on the top of the second base. By detecting the humidity of the special paper and performing humidification treatment, and by adding a desiccant to the ink tank, the ink drying speed is improved, thereby increasing printing efficiency.

[0004] However, in the process of printing on specialty paper, when the specialty paper has a deep or complex surface texture, the ink has a limited effect on filling the sidewalls and depressions of the texture, making it difficult to fully present a three-dimensional effect and ink saturation. In addition, ink overflow may occur at the edges during the printing process, affecting the pass rate of subsequent processes such as die-cutting and mounting. Furthermore, if the axial movement of the impression cylinder is introduced to improve the ink adhesion of the texture, the existing equipment is prone to vibration when running at high frequencies, which affects the printing accuracy and component life. Summary of the Invention

[0005] The purpose of this application is to provide a printing apparatus, a printing method, and its application in specialty paper, in order to solve the problems in the prior art.

[0006] To solve the above-mentioned technical problems, this application adopts the following technical solution: In a first aspect, this application provides a printing apparatus, including a storage bin cover. The storage bin cover has a paper inlet and a paper outlet on its left and right sides, respectively. A crossbeam is fixed to the upper and lower sides of the center of the storage bin cover. A first conveyor wheel assembly and a second conveyor wheel assembly are respectively installed on the left and right sides inside the two crossbeams. A printing plate cylinder is fixedly and continuously inside the upper crossbeam. A surface characteristic detection unit is provided between the first conveyor wheel assembly and the printing plate cylinder. A storage bin door is hinged to the front of the storage bin cover. An impression mechanism is fixedly and continuously inside the lower crossbeam. The impression mechanism includes an outer frame fixed to the rear side of the storage bin cover. The outer frame seat has a reinforcing seat fixed on both the left and right sides, and the two reinforcing seats are respectively wrapped and fixed inside the crossbeam located on the lower side. The bottom left and right sides of the outer frame seat are each connected by a screw rod, and the two screw rods are respectively threaded to the inside of the left and right sides of the inner frame seat. The inner frame seat is longitudinally slidably connected to the inside of the outer frame seat. The inner frame seat is provided with a pressure cylinder structure, and the pressure cylinder structure is located below the printing plate cylinder. The top right side of the inner frame seat is embedded with two edge scraping structures. The two edge scraping structures are identical in structure and size, and are located in the middle of the inner frame seat in a symmetrical arrangement.

[0007] Furthermore, the pressure cylinder structure includes a chamber seat embedded and fixed inside the inner frame seat. The left and right sides of the chamber seat are divided to form a first chamber and a second chamber. A drive assembly is installed on the rear side of the chamber seat and extends through the rear sides of the first and second chambers. A first carrier plate and a second carrier plate are respectively connected to the left and right sides of the front part of the drive assembly. The first carrier plate is slidably connected to the rear side of the first chamber, and the second carrier plate is slidably connected to the rear side of the second chamber. A drive motor is locked and fixed in the middle of the rear side of the first carrier plate. The front output end of the drive motor is connected to an impression cylinder. The impression cylinder is rotatably disposed inside the first chamber and is located directly below the printing plate cylinder. A balancing mass block is installed on the front side of the second carrier plate. The height of the top of the balancing mass block is lower than the height of the top of the impression cylinder.

[0008] Furthermore, a first shaft is slidably inserted into the front axis of the impression cylinder, the first shaft is fixed to the front side of the inner wall of the chamber, and a first spring is wrapped around the front side of the outer surface of the first shaft, the first spring abutting against the front side of the impression cylinder; a second shaft is slidably inserted into the front side of the counterweight block, the second shaft is fixed to the front side of the inner wall of the chamber, and a second spring is wrapped around the front side of the outer surface of the second shaft, the second spring abutting against the front side of the counterweight block, and a counterweight block is locked onto the top side of the counterweight block.

[0009] Furthermore, the drive assembly includes a servo motor that passes through and is fastened to the rear side of the second chamber. The left output end of the servo motor is connected to a drive gear, and the top side of the drive gear meshes with a driven gear. A rotating shaft is fixed through the axis of the driven gear. The rotating shaft passes through and rotates on the adjacent side of the first chamber and the second chamber respectively. The left end of the rotating shaft is connected to a first pusher component, and the right end of the rotating shaft is connected to a second pusher component. The first pusher component and the second pusher component have the same structure and are configured to move in opposite directions. The front side of the first pusher component is connected to the first carrier plate, and the front side of the second pusher component is connected to the second carrier plate.

[0010] Furthermore, the first pushing component includes a base whose bottom is fastened to the compartment seat. An eccentric wheel is rotatably connected through the rear side of the base, and the central axis of the eccentric wheel is coaxially connected to the rotating shaft. A collar is sleeved on the outer surface of the eccentric wheel. An obtuse-angle plate is rotatably connected to the front side of the collar. A push rod is rotatably connected to the turning point of the obtuse-angle plate. A buffer rod is rotatably connected to the outer side of the connection between the obtuse-angle plate and the collar. A V-shaped sleeve is slidably wrapped around the outer surface of the buffer rod. The front end of the V-shaped sleeve is rotatably connected to the end of the obtuse-angle plate away from the collar, and the rear end of the V-shaped sleeve is rotatably connected to the top side of the collar. A compression spring is wrapped around both the upper and lower sides of the outer surface of the buffer rod. The opposing sides of the two compression springs are connected to the V-shaped sleeve. The push rod slides through the front side of the base, and the front end of the push rod is connected to the first carrier plate.

[0011] Furthermore, a sliding sleeve is provided at the central pivot of the V-shaped sleeve rod. The sliding sleeve wraps around and slides on the outer surface of the buffer rod, and the two sides of the sliding sleeve abut against two compression springs respectively.

[0012] Furthermore, the edge scraping structure includes a base embedded and fixed to the top right side of the inner frame seat. A first motor is locked and fixed to the front side of the base. A first screw is connected to the rear output end of the first motor. The first screw is rotatably connected to the inside of the base, and an internal threaded support block is threaded to the outer surface of the first screw. A sleeve is tightly fixed to the top side of the internal threaded support block. A second motor is locked and fixed to the bottom side of the inside of the sleeve. A second screw is connected to the top output end of the second motor. An internal threaded sleeve is threaded to the outer surface of the second screw. The internal threaded sleeve slides longitudinally through the top side of the sleeve. A scraper is rotatably connected to the top end of the internal threaded sleeve. A connecting rod is rotatably connected to the side of the scraper near the internal threaded sleeve. A pad is rotatably connected to the bottom end of the connecting rod. The bottom of the pad is fastened to the sleeve.

[0013] Furthermore, the top of the base is provided with a through groove, and the internal threaded support block slides through the inside of the through groove, with the bottom of the internal threaded support block slidingly contacting the bottom side of the base.

[0014] Secondly, this application also provides a printing method for printing on special paper using the aforementioned printing equipment, comprising the following steps: S1. The special paper to be printed is fed in through the paper inlet and conveyed horizontally by the first conveyor wheel group and the second conveyor wheel group, so that it passes under the surface characteristic detection unit and the printing plate cylinder. S2. Based on the special paper surface texture information obtained by the surface characteristic detection unit, set the working parameters of the printing mechanism, including printing pressure, frequency of axial reciprocating motion of the printing cylinder, and position and tilt angle of the scraper in the edge scraping structure. S3. Start printing. The drive motor drives the impression cylinder to rotate. The drive assembly drives the first and second carrier plates to reciprocate in opposite directions along the axial direction, causing the impression cylinder to move axially back and forth and the balance mass block to move synchronously in the opposite direction. Under dynamic shearing force, the ink is transferred to the surface of the special paper. At the same time, the doctor blade scrapes the ink on both sides of the paper edge to form a chamfer. S4. The paper that has been printed and edge-processed is fed out and collected by the second conveyor wheel group through the paper outlet.

[0015] Thirdly, this application also provides an application of the above-mentioned printing equipment in the printing of specialty paper, wherein the specialty paper is at least one of pearlescent paper, tactile paper, gold card paper, silver card paper, or embossed paper.

[0016] In summary, this application includes the following beneficial technical effects: 1. This application fundamentally solves the vibration problem caused by inertial force in axial reciprocating printing by setting up a reverse synchronous reciprocating motion system of the impression cylinder and the balancing mass block; the drive component adopts a single servo motor with gear transmission and two push-position components with a phase difference of 180°, which can simultaneously generate reciprocating driving forces in opposite directions. The structure is compact and the synchronization accuracy is high, without the need for complex electronic synchronization control; at the same time, the elastic buffer mechanism composed of eccentric wheel, obtuse angle plate, buffer rod and compression spring in the push-position component can effectively absorb inertial impact energy during reciprocating reversal, making the movement of the carrier plate smoother, further reducing equipment vibration and noise, protecting precision bearings and transmission components, significantly extending the service life of the equipment, and allowing stable operation at higher frequencies to meet the needs of high-speed printing.

[0017] 2. This application solves the problem of edge ink overflow caused by axial pushing by integrating an edge scraping structure downstream of the printing color group. The two edge scraping structures are symmetrically arranged front and back, corresponding to the two sides of the paper respectively. The front and back positions of the scraper can be independently adjusted by the first motor and the first screw, so that the blade edge can accurately fit the paper edge. The tilt angle of the scraper can be independently adjusted by the second motor, the second screw and the linkage mechanism, so that while scraping off excess ink, a uniform and controllable tilt chamfer is formed on the paper edge. This tilt chamfer not only makes the printed edge clean and smooth, but also effectively avoids problems such as color bursting and ink removal caused by excessive ink layer on the edge during subsequent die-cutting, creasing, and mounting processes, thereby improving the pass rate of subsequent processing and the product refinement.

[0018] 3. This application achieves adaptive adjustment of process parameters for different specialty paper textures by cooperating with a surface characteristic detection unit, a height-adjustable inner frame, and an adjustable parameter drive system. Operators can flexibly adjust the printing pressure, axial reciprocating frequency, and doctor blade working parameters according to the paper texture information, enabling the equipment to adapt to the printing needs of various specialty papers with different surface textures, such as pearlescent paper, tactile paper, gold cardboard, silver cardboard, and embossed paper. The application of axial reciprocating dynamic shear force allows the ink to fully fill the sidewalls and depressions of the texture, significantly improving the ink uniformity, three-dimensionality, and metallic luster of the printed products, thereby comprehensively improving the quality and market competitiveness of specialty paper printing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the printing equipment used in this application; Figure 2 This is a schematic diagram of the imprinting mechanism of this application; Figure 3 This is a top view schematic diagram of the pressure cylinder structure of this application; Figure 4 This application Figure 3 A schematic diagram of the structure of the drive component; Figure 5 This application Figure 4 A schematic diagram of the left-side structure of the first pusher component; Figure 6 This is a schematic diagram of the edge scraping structure of this application; Figure 7 This application Figure 6 A schematic diagram of the internal structure of the middle edge scraping structure from the left view.

[0020] Explanation of reference numerals in the attached drawings: 1. Sheet cover; 2. Paper inlet; 3. Paper outlet; 4. Crossbeam; 5. First conveyor wheel assembly; 6. Second conveyor wheel assembly; 7. Surface characteristic detection unit; 8. Printing plate cylinder assembly; 9. Imprinting mechanism; 10. Sheet door; 91. Outer frame seat; 92. Reinforcing seat; 93. Lead screw; 94. Inner frame seat; 95. Pressure cylinder structure; 96. Edge scraping structure; 951. Sheet seat; 952. First chamber; 953. Second chamber; 954. Drive assembly; 955. First carrier plate; 956. Second carrier plate; 957. Drive motor; 958. Imprinting cylinder; 959. Balance mass block; 9581. First shaft; 9582. First spring; 9591. Second shaft; 9592. Second spring; 9593, Counterweight; 9541, Servo Motor; 9542, Drive Gear; 9543, Driven Gear; 9544, Rotating Shaft; 9545, First Pushing Component; 9546, Second Pushing Component; 95451, Carrier; 95452, Eccentric Wheel; 95453, Collar; 95454, Obtuse Angle Plate; 95455, Push Rod; 95456, Buffer Rod; 95457, V-Shaped Sleeve Rod; 95458, Compression Spring; 961, Base; 962, First Motor; 963, First Screw; 964, Internal Threaded Support Block; 965, Sleeve; 966, Second Motor; 967, Second Screw; 968, Internal Threaded Sleeve Column; 969, Scraper; 9610, Connecting Rod; 9611, Pad Block. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 -Appendix Figure 7 This application will be described in further detail below.

[0022] like Figure 1As shown, this embodiment provides a printing device, including a housing 1. The housing 1 has a rectangular box structure with a paper inlet 2 and a paper outlet 3 on the left and right sides, respectively. A housing door 10 is hinged to the front of the housing 1 for easy maintenance and replacement of parts. Inside the housing 1, a horizontal beam 4 extending in the left-right direction is welded and fixed at the upper and lower positions of the central axis. The upper horizontal beam 4 and the lower horizontal beam 4 have the same structure and are parallel to each other. A first conveyor wheel set 5 and a second conveyor wheel set 6 are respectively installed on the left and right sides inside the two horizontal beams 4. The first conveyor wheel set 5 is close to the paper inlet 2, and the second conveyor wheel set 6 is close to the paper outlet 3. Each conveyor wheel set includes a... Multiple pairs of externally driven, upper and lower pressing rubber wheels are used to clamp and feed paper horizontally from left to right. A printing plate cylinder component 8 is fixed through the middle of the upper crossbeam 4. The printing plate cylinder component 8 includes a printing plate cylinder and its ink supply system. The axis of the printing plate cylinder is set horizontally in the front-to-back direction, and its lower edge is lower than the lower surface of the upper crossbeam 4. A surface characteristic detection unit 7 is set above the paper path between the first conveyor wheel group 5 and the printing plate cylinder component 8. The surface characteristic detection unit 7 can be a linear CCD camera or a laser profile sensor, used to acquire texture images or depth data of the paper surface and transmit them to the equipment controller.

[0023] like Figure 1 and Figure 2 As shown, an impression mechanism 9 is fixedly installed inside the lower crossbeam 4. The impression mechanism 9 includes an upper-facing outer frame seat 91. The rear side wall of the outer frame seat 91 is fastened to the inner rear wall of the housing 1 by bolts. A reinforcing seat 92 is welded to each of its two outer sides. The two reinforcing seats 92 are respectively embedded in and tightly fixed to the inner sides of the lower crossbeam 4 to ensure overall rigidity. A lead screw 93 is rotatably installed on each of the left and right sides of the bottom of the outer frame seat 91. The upper end of the lead screw 93 extends into the inner cavity of the outer frame seat 91 and is threadedly connected to the left and right sides of the inner frame seat 94. The lower end of the lead screw 93 extends out of the outer frame seat 91 and can be connected to an adjusting handwheel or a micro motor. The inner frame seat 94 is rectangular, and its outer circumference is longitudinally slidably connected to the inside of the outer frame seat 91 through a guide rail slider mechanism. Rotating the two lead screws 93 can raise and lower the inner frame seat 94, thereby precisely adjusting the printing pressure between the impression cylinder 958 and the printing plate cylinder 8. The inner frame seat 94 has a groove on the top right side inside, and two edge scraping structures 96 are embedded and fixed therein. The two edge scraping structures 96 are arranged symmetrically front and back, respectively corresponding to the front and back edges of the paper, and are used for subsequent edge scraping treatment. A pressure cylinder structure 95 is installed in the middle of the inner cavity of the inner frame seat 94. The pressure cylinder structure 95 is located directly below the printing plate cylinder 8.

[0024] like Figures 2 to 5As shown, the pressure cylinder structure 95 includes a chamber 951 embedded and fixed inside the inner frame 94 with screws. The chamber 951 is divided into a first chamber 952 and a second chamber 953 on its left and right sides. The first chamber 952 is located on the left, corresponding to the main working area below the printing plate cylinder 8, and the second chamber 953 is located on the right. A drive assembly 954 is installed on the rear side of the chamber 951. The main body of the drive assembly 954 spans the rear area of ​​the first chamber 952 and the second chamber 953, with its left and right ends extending forward and connecting to a first carrier plate 955 and a second carrier plate 956, respectively. The first carrier plate 955 is slidably connected to a linear guide fixed to the rear side of the first chamber 952 and can slide back and forth in the front-to-back direction. The second carrier plate 956 is slidably connected to the linear guide on the rear side of the second chamber 953 in the same manner. A bolt is used to lock the middle of the rear side of the first carrier plate 955. A drive motor 957 has its front output shaft passing through a first carrier plate 955 and connected to the rear end of an impression cylinder 958 via a coupling. The roller body of the impression cylinder 958 is placed in a first chamber 952, with its axis extending in the front-rear direction. The upper part of the roller surface is opposite to the lower edge of the printing plate cylinder of the printing plate cylinder assembly 8, forming a horizontal paper-feeding impression gap between them. A balance mass block 959 is bolted to the front side of a second carrier plate 956. The balance mass block 959 is a rectangular metal block, and the height of the top part of the balance mass block 959 is lower than the height of the top part of the impression cylinder 958 to avoid interfering with paper feeding. The mass relationship between the balance mass block 959 and the impression cylinder 958 is as follows: the total mass of the balance mass block (including subsequent counterweights) is equal to the mass of the part of the impression cylinder 958 that participates in the axial reciprocating motion (including the impression cylinder itself, the drive motor rotor, and the connecting parts), thereby achieving dynamic balance.

[0025] To guide and reset the axial movement of the impression cylinder 958 and the balancing mass block 959, a blind hole is machined at the axis of the front side inside the impression cylinder 958. A first shaft 9581 is slidably inserted into this blind hole. The front end of the first shaft 9581 is fixed to the front side of the inner wall of the chamber 951 by a flange. A first spring 9582 is fitted on the outer surface of the first shaft 9581 near the flange on the front side. The first spring 9582 is a cylindrical helical compression spring, and its rear end abuts against the impression cylinder 958. The front end provides a restoring force when compressed forward; the front side of the internal counterweight block 959 is slidably fitted with a second shaft 9591 in the same manner, the front end of the second shaft 9591 is fixed to the front wall of the housing 951, and a second spring 9592 is sleeved on it, the rear end of the second spring 9592 abuts against the front end of the counterweight block 959; the top side of the counterweight block 959 is provided with a T-shaped groove, and one or more counterweight blocks 9593 are installed by bolt locking, which can increase or decrease the counterweight according to the actual balance effect to achieve fine adjustment.

[0026] The drive assembly 954 includes a servo motor 9541, which is fastened to the rear side of the second chamber 953 through a flange. The left output shaft of the servo motor 9541 is keyed to a drive gear 9542. A driven gear 9543 meshes above the drive gear 9542. A rotating shaft 9544 passes through and is fixed at the axis of the driven gear 9543. Its left end extends into the first chamber 952 and is connected to the first pusher component 9545, and its right end extends into the second chamber 953 and is connected to the second pusher component 9546. The internal structures of the first pusher component 9545 and the second pusher component 9546 are exactly the same, but their installation phases are 180° apart. That is, when the first pusher component 9545 drives the first carrier plate 955 to move forward, the second pusher component 9546 drives the second carrier plate 956 to move backward, and vice versa.

[0027] Taking the first pushing component 9545 as an example, its structure is described. The first pushing component 9545 includes a carrier 95451. The bottom of the carrier 95451 is fastened to the bottom wall of the storage compartment 951 by bolts. An eccentric wheel 95452 is rotatably mounted on the rear vertical wall plate of the carrier 95451 through a bearing. The central shaft hole of the eccentric wheel 95452 is coaxially connected to the left end of the rotating shaft 9544 and rotates with it. A sleeve ring 95453 is sleeved on the outer circumference of the eccentric part of the eccentric wheel 95452. A needle roller bearing is installed between the sleeve ring 95453 and the eccentric part to achieve relative rotation.

[0028] A hinge lug extends outward from the front side of the collar 95453. This hinge lug is rotatably connected to the rear end of an obtuse-angled plate 95454. The obtuse-angled plate 95454 is a plate-shaped lever bent at an obtuse angle. Its bend is rotatably connected to the rear end of a push rod 95455 via a pin. The front end of the push rod 95455 passes through a guide hole in the front vertical plate of the carrier 95451 and is hinged to the rear side of the first carrier plate 955. At the same time, the obtuse-angled plate 95454 and the collar 95453 are connected... A buffer rod 95456 is rotatably connected to the outer side of the connection of 453. The upper part of the buffer rod 95456 is a cylindrical smooth rod, and a V-shaped sleeve 95457 is slidably sleeved on its outer surface. The V-shaped sleeve 95457 is roughly V-shaped. Its front end is rotatably connected to the end of the obtuse angle piece 95454 away from the collar 95453 (i.e., the upper end of the obtuse angle piece 95454), and its rear end is rotatably connected to the ear seat extending from the top side of the collar 95453.

[0029] A sliding sleeve is fixed at the pivot point of the V-shaped sleeve 95457. The sliding sleeve is slidably fitted on the outer circle of the buffer rod 95456. A compression spring 95458 is fitted on each of the upper and lower sides of the buffer rod 95456. The opposite ends of the two compression springs 95458 abut against the upper and lower end faces of the sliding sleeve, and the other ends abut against the upper and lower steps of the buffer rod 95456, respectively.

[0030] When the eccentric wheel 95452 rotates, the collar 95453 transmits the eccentric rotational motion to the push rod 95455 through the obtuse-angle plate 95454, forming an approximately linear reciprocating motion. When the stroke ends and reverses direction, the impact caused by inertia will cause the obtuse-angle plate 95454 to produce a slight elastic rotation. At this time, the sliding sleeve slides along the buffer rod 95456 and compresses the compression spring 95458 on the corresponding side, absorbing the impact energy, thereby making the push rod 95455 move more smoothly and reducing vibration and noise. The eccentric wheel of the second push component 9546 is installed in the opposite phase to the first push component 9545, so its push rod movement direction is always opposite to the push rod of the first push component 9545, realizing the alternating reverse synchronous movement of the first carrier plate 955 and the second carrier plate 956.

[0031] like Figure 6 and Figure 7 As shown, the edge scraping structure 96 is used to scrape the two sides of the paper after it has passed through the printing line. Each edge scraping structure 96 includes a base 961 embedded in the groove on the top right side of the inner frame 94. A first motor 962 is fixed to the front of the base 961. The first motor 962 is a stepper motor. Its output shaft is connected to a first screw 963 arranged in the front-back direction. The first screw 963 is rotatably installed inside the base 961 through a bearing. Its outer surface is threadedly connected to an internal thread support block 964. The bottom of the internal thread support block 964 slides against the inner bottom wall of the base 961. The top of the internal thread support block 964 protrudes upward from the through groove opened on the top of the base 961 and is fastened to a sleeve 965. When the first motor 962 drives the first screw 963 to rotate, the internal thread support block 964 drives the sleeve 965 to move in the front-back direction, thereby adjusting the front-back position of the scraper 969 so that its cutting edge is aligned with the edge of the paper.

[0032] A second motor 966, also a stepper motor, is locked and fixed to the bottom of the sleeve 965. Its top output end is connected to a second screw 967. The second screw 967 is vertically positioned, with its outer surface threadedly connected to an internally threaded sleeve 968. The outer circumference of the internally threaded sleeve 968 is splined, and it slides longitudinally through a guide hole on the top side of the sleeve 965 to prevent rotation. A scraper 969 is rotatably connected to the top of the internally threaded sleeve 968 via a hinge shaft. The scraper 969 is rotatably connected to the upper end of a connecting rod 9610 near the internally threaded sleeve 968. The lower end of the connecting rod 9610 is rotatably connected to a pad 9611. 11 is fixed to the top of the sleeve 965 by screws; when the second motor 966 drives the second screw 967 to rotate, the internal threaded sleeve 968 rises and falls in the vertical direction. Under the pull of the connecting rod 9610, the scraper 969 swings around the hinge point between itself and the internal threaded sleeve 968, thereby changing the angle between the cutting edge plane and the paper plane, that is, adjusting the angle of the scraping chamfer; this mechanism can independently adjust the front and rear position and tilt angle of the scraper to adapt to different paper widths and different chamfering requirements.

[0033] The working process and printing method of the printing equipment in this application are as follows: First, a roll of special paper (such as pearlescent paper) is fed into the paper inlet 2. The first conveyor wheel group 5 clamps the paper and conveys it to the right, passing below the surface characteristic detection unit 7. The surface characteristic detection unit 7 scans the surface of the paper to obtain data such as texture direction and depth, and transmits it to the controller.

[0034] Second, the controller outputs control signals according to the preset process algorithm or manual settings: the micro motor at the lower end of the drive screw 93 causes the inner frame seat 94 to rise and fall, and the printing pressure is set; the speed of the servo motor 9541 is adjusted, thereby changing the axial reciprocating frequency of the impression cylinder 958 (range 0.5~50Hz); the first motor 962 is driven to move the doctor blade 969 in the front-back direction so that its blade edge is just in contact with the two sides of the paper; the second motor 966 is driven to adjust the tilt angle of the doctor blade 969 to the required chamfer angle.

[0035] Third, printing is started. The drive motor 957 drives the impression cylinder 958 to rotate. At the same time, the servo motor 9541 drives the rotating shaft 9544 to rotate through the drive gear 9542 and the driven gear 9543. The first pusher component 9545 and the second pusher component 9546 respectively push the first carrier plate 955 and the second carrier plate 956 to reciprocate in opposite directions. The first carrier plate 955 drives the impression cylinder 958 to perform high-frequency reciprocating micro-motion along its axis (front and back direction). The second carrier plate 956 drives the balance mass block 959 to move synchronously in the opposite direction. The paper is pressed between the impression cylinder 958 and the printing plate cylinder 8 and is transported horizontally to the right. Under the combined action of vertical pressure and axial dynamic shear force, the ink fully fills the texture of the paper surface, completing the transfer of image and text. At the same time, the excess ink on both sides of the paper that has just left the impression line and has not yet been completely fixed is scraped off by the doctor blade 969, forming a uniform inclined chamfer at the edge.

[0036] Fourth, the paper that has been printed and edge-treated continues to be conveyed by the second conveyor wheel group 6, and is sent out through the paper outlet 3 and collected by the paper collection device.

[0037] The aforementioned printing equipment is particularly suitable for printing on specialty papers with surface textures, such as pearlescent paper, tactile paper, gold cardstock, silver cardstock, or embossed paper. Through axial reciprocating dynamic printing, the texture ink adhesion effect can be significantly improved, presenting a more vivid three-dimensional effect and metallic luster; the dynamic balancing system ensures stability under high-speed operation; and the edge chamfering treatment improves the adaptability to subsequent processing, meeting the stringent requirements of high-end packaging, labels, and other products.

[0038] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A printing device, comprising a hood (1), wherein a paper inlet (2) and a paper outlet (3) are respectively provided on the left and right sides of the hood (1), and a crossbeam (4) is fixed on both the upper and lower sides of the middle part of the hood (1). A first conveyor wheel set (5) and a second conveyor wheel set (6) are respectively installed on the left and right sides inside the two crossbeams (4). A printing plate cylinder (8) is fixed through the crossbeam (4) located on the upper side. A surface characteristic detection unit (7) is provided between the first conveyor wheel set (5) and the printing plate cylinder (8). A hood door (10) is hinged to the front side of the hood (1). characterized in that An embossing mechanism (9) is fixedly installed inside the lower crossbeam (4). The embossing mechanism (9) includes an outer frame seat (91) fixed to the rear side of the hood (1). A reinforcing seat (92) is fixed on both the left and right sides of the outer frame seat (91), and the two reinforcing seats (92) are respectively wrapped and fixed inside the lower crossbeam (4). A lead screw (93) is rotatably installed on both the left and right sides of the bottom of the outer frame seat (91). The two lead screws (93) are respectively threaded to the left and right sides of the inner frame seat (94). 4) The inner frame (94) is longitudinally slidably connected to the inside of the outer frame (91). The inner frame (94) is provided with a pressure cylinder structure (95), and the pressure cylinder structure (95) is located below the printing plate cylinder (8). Two edge scraping structures (96) are embedded on the top right side of the inner frame (94). The two edge scraping structures (96) have the same structure and size, and are symmetrically arranged in the middle of the inner frame (94). The pressure cylinder structure (95) includes a storage compartment (951) embedded and fixed inside the inner frame (94). The interior is divided into a first chamber (952) and a second chamber (953) on the left and right sides. A drive assembly (954) is installed on the rear side of the compartment (951), and the drive assembly (954) is disposed through the rear side of the first chamber (952) and the second chamber (953). A first carrier plate (955) and a second carrier plate (956) are respectively connected to the left and right sides of the front part of the drive assembly (954). The first carrier plate (955) is slidably connected to the rear side of the first chamber (952), and the second carrier plate (956) is slidably connected to the rear side of the second chamber (953). On the rear side of the first carrier plate (953), a drive motor (957) is locked and fixed in the middle of the rear side. The front output end of the drive motor (957) is connected to an impression cylinder (958). The impression cylinder (958) is rotatably disposed inside the first chamber (952) and the impression cylinder (958) is located directly below the printing plate cylinder (8). A balance mass block (959) is installed on the front side of the second carrier plate (956). The height of the top end of the balance mass block (959) is lower than the position of the top end of the impression cylinder (958).

2. The printing apparatus of claim 1, wherein: A first shaft (9581) is inserted and slidably inserted into the front axis of the imprinting cylinder (958). The first shaft (9581) is fixed to the front side of the inner wall of the storage unit (951), and a first spring (9582) is wrapped around the front side of the outer surface of the first shaft (9581). The first spring (9582) abuts against the front side of the imprinting cylinder (958). A second shaft (9591) is inserted and slidably inserted into the front side of the counterweight block (959). The second shaft (9591) is fixed to the front side of the inner wall of the storage unit (951), and a second spring (9592) is wrapped around the front side of the outer surface of the second shaft (9591). The second spring (9592) abuts against the front side of the counterweight block (959). A counterweight block (9593) is locked and assembled on the top side of the counterweight block (959).

3. The printing apparatus of claim 1, wherein: The drive assembly (954) includes a servo motor (9541) that passes through and is fastened to the rear side of the second chamber (953). A drive gear (9542) is connected to the left output end of the servo motor (9541). A driven gear (9543) meshes with the top side of the drive gear (9542). A rotating shaft (9544) is fixed through the axis of the driven gear (9543). The rotating shaft (9544) rotates through the first chamber (952) and the second chamber (953). On the adjacent side, the left end of the rotating shaft (9544) is connected to the first pusher component (9545), and the right end of the rotating shaft (9544) is connected to the second pusher component (9546). The first pusher component (9545) and the second pusher component (9546) have the same structure and are configured to move in opposite directions. The front side of the first pusher component (9545) is connected to the first carrier plate (955), and the front side of the second pusher component (9546) is connected to the second carrier plate (956).

4. The printing equipment according to claim 3, characterized in that: The first push-position component (9545) includes a base (95451) whose bottom is fastened to the compartment base (951). An eccentric wheel (95452) is rotatably connected through the rear side of the base (95451). The central axis of the eccentric wheel (95452) is coaxially connected to the rotating shaft (9544). A collar (95453) is sleeved on the outer surface of the eccentric wheel of the eccentric wheel (95452). An obtuse-angled plate (95454) is rotatably connected to the front side of the collar (95453). A push rod (95455) is rotatably connected to the turning point of the obtuse-angled plate (95454). A buffer rod (95456) is rotatably connected to the outer side of the connection between the obtuse-angled plate (95454) and the collar (95453). The outer surface of the buffer rod (95456) is wrapped with a V-shaped sleeve (95457). The front end of the V-shaped sleeve (95457) is rotatably connected to the end of the obtuse-angled plate (95454) away from the collar (95453). The rear end of the V-shaped sleeve (95457) is rotatably connected to the top side of the collar (95453). A compression spring (95458) is wrapped on both the upper and lower sides of the outer surface of the buffer rod (95456). The opposing sides of the two compression springs (95458) are connected to the V-shaped sleeve (95457). The push rod (95455) slides through the front side of the carrier (95451), and the front end of the push rod (95455) is connected to the first carrier plate (955).

5. The printing equipment according to claim 4, characterized in that: A sliding sleeve is provided at the central pivot of the V-shaped sleeve (95457). The sliding sleeve wraps around and slides on the outer surface of the buffer rod (95456), and the two sides of the sliding sleeve abut against two compression springs (95458) respectively.

6. The printing equipment according to claim 1, characterized in that: The edge scraping structure (96) includes a base (961) embedded and fixed to the top right side of the inner frame base (94). A first motor (962) is locked and fixed to the front side of the base (961). A first screw (963) is connected to the rear output end of the first motor (962). The first screw (963) is rotatably connected to the inside of the base (961). An internal thread support block (964) is threaded to the outer surface of the first screw (963). A fixed sleeve (965) is tightly fastened to the top side of the internal thread support block (964). A second motor (966) is locked and fixed to the bottom side inside the sleeve (965). The second motor (966) is connected to a second screw (967) at its top output end. The outer surface of the second screw (967) is threaded with an internal threaded sleeve (968). The internal threaded sleeve (968) slides longitudinally through the top side of the sleeve (965). A scraper (969) is rotatably connected to the top of the internal threaded sleeve (968). A connecting rod (9610) is rotatably connected to the side of the scraper (969) near the internal threaded sleeve (968). A pad (9611) is rotatably connected to the bottom end of the connecting rod (9610). The bottom of the pad (9611) is fastened to the sleeve (965).

7. The printing equipment according to claim 6, characterized in that: The base (961) has a through groove at the top, and the internal threaded support block (964) slides through the through groove. The bottom of the internal threaded support block (964) slides in contact with the bottom side of the base (961).

8. A printing method, characterized in that, Printing on specialty paper using the printing equipment according to any one of claims 1 to 7 includes the following steps: S1. The special paper to be printed is fed in through the paper inlet (2) and conveyed horizontally by the first conveyor wheel group (5) and the second conveyor wheel group (6) so that it passes under the surface characteristic detection unit (7) and the printing plate cylinder (8). S2. Based on the surface texture information of the special paper obtained by the surface characteristic detection unit (7), set the working parameters of the printing mechanism (9), including printing pressure, frequency of axial reciprocating motion of the printing roller (958), and position and tilt angle of the scraper (969) in the edge scraping structure (96). S3. Start printing. Drive motor (957) drives impression cylinder (958) to rotate. Drive assembly (954) drives first carrier plate (955) and second carrier plate (956) to reciprocate in opposite directions along the axial direction, so that impression cylinder (958) moves axially and reciprocates, and balance mass block (959) moves synchronously in opposite directions. Under dynamic shear force, ink is transferred to the surface of special paper. At the same time, doctor blade (969) scrapes the ink on both sides of the paper edge to form a chamfer. S4. The paper that has been printed and edge-treated is sent out and collected by the second conveyor wheel group (6) through the paper outlet (3).

9. The application of a printing apparatus according to any one of claims 1 to 7 in the printing of specialty paper, characterized in that, The specialty paper is at least one of pearlescent paper, tactile paper, gold cardstock, silver cardstock, or embossed paper.

Images