183 results about "Color printing" patented technology

The utility model relates to the technical field of color printing equipment, and discloses quick-drying color printing equipment which comprises a workbench, a storage groove is formed in one side of the upper surface of the workbench, rotating rods are rotationally connected to the front ends and the rear ends of the two sides of the inner wall of the storage groove, and a first servo motor is fixedly connected to one side of the upper portion of the outer wall of the front end of the workbench. According to the color printing equipment, when the color printing equipment is used, the first servo motor is started to drive the rotating rod to rotate and drive the conveying belt to rotate at the same time, materials subjected to color printing can be conveyed, a photoinitiator in UV printing ink can be rapidly triggered to react through cooperation of the multiple sets of ultraviolet curing lamps, printing ink curing is achieved, and the color printing efficiency is improved. And a second servo motor is matched to drive a driving rod to rotate and drive a driven rod to rotate at the same time, then two sets of circulating fans diffuse internal hot air, and residual moisture or solvent on the surface of the material and in the material is further evaporated.

The invention discloses an alcohol dampening four-opening single-color printing machine, and belongs to the technical field of printing machines, the alcohol dampening four-opening single-color printing machine comprises a rack placed on the ground of a plant, a motor is fixedly installed on the outer side of the rack, and a printing roller piece is arranged on the inner side of the rack; the printing roller piece comprises a fountain roller, a metering roller, a dampening roller, a dampening stringing roller, a middle roller, a first inking roller and a plate cylinder which are rotationally installed on the inner side of the rack, the shaft portions of the two ends of the fountain roller are rotationally connected with a first water glue foot and a second water glue foot respectively, and the metering roller is rotationally installed between the first water glue foot and the second water glue foot. And the metering roller is driven to be attached to the outer side of the dampening roller in the rotating process of the first glue foot and the second glue foot. According to the alcohol dampening four-opening single-color printing machine, the metering roller can be conveniently controlled to be attached to the dampening roller, efficient alcohol dampening operation is achieved, dripped dampening liquid can be recycled, loss of the dampening liquid is reduced, and the dampening effect is improved.

The invention belongs to the technical field of image detection, and discloses a color printing packaging pattern detection system and method based on image processing, and the method comprises the steps: obtaining a four-color printing image and a standard image, and setting four color monitoring blocks and definition monitoring blocks corresponding to four color channels; collecting a to-be-detected sample image, registering the to-be-detected sample image with the standard image, extracting image features, and judging whether the to-be-detected sample image is qualified or not according to feature differences; when the to-be-detected sample sheet image is qualified, obtaining a to-be-detected sample sheet image sequence, and extracting color ink coverage features in each color monitoring block and edge transition features of the definition monitoring block to form a time sequence; and carrying out trend analysis on the time sequence, and sending early warning information when a change trend exists. By performing trend analysis on the continuous qualified sample sheet sequence, an abnormal change trend can be found and early warning can be given out when a printed matter is still in a qualified range in the early stage of progressive fault development, so that preventive maintenance is realized.

The present application is suitable for the field of printing technology, and provides an environment-friendly printing device for color printing of wear-resistant corrugated carton, which comprises a conveying seat and a printing assembly, the printing assembly is connected with the conveying seat through a lifting assembly, a conveying groove is formed in the top of the conveying seat, a plurality of conveying rollers two are uniformly arranged on the conveying seat below the printing assembly, and a plurality of conveying rollers one are uniformly arranged on the conveying seat on both sides of the conveying rollers two; a driving assembly is installed on the conveying seat, the driving assembly is used for driving all the conveying rollers one and the conveying rollers two to rotate synchronously and in the same direction; a negative pressure assembly is installed on the conveying seat, the negative pressure assembly is connected with all the conveying rollers two and sucks air through air holes; a material guiding assembly is further installed on the feeding end of the conveying seat, and the material guiding assembly is used for assisting the paperboard to be centered. The present application can ensure smooth printing and conveying of the paperboard, especially keep stable conveying state when printing, and improve the printing quality.

The application discloses a kind of tetraphenyl ethylene-chalcone derivative preparation and its application preparation and its application.The structure is as follows: the method includes: 4-(1,2,2-triphenyl ethenyl) acetophenone, aldehyde derivative, sodium hydroxide (provides alkaline condition, pH=8.3~8.5), is placed in anhydrous ethanol, under the condition that heating temperature is 80 DEG C, reflux reaction 12h, after reaction is ended, the functional organic material is separated and purified.The functional organic material synthesized according to the above method has larger conjugated system, and has significant pressure-induced color change characteristics.The functional organic material disclosed in the application has low preparation cost, simple operation, simple method, and the material shows significant pressure-induced color change characteristics, can be applied to pressure-induced color change, luminescent material, printing and dyeing, color printing and anti-counterfeiting technical field.

The utility model discloses aluminum veneer color printing equipment which aims at solving the problems that in the prior art, power sources in at least two directions need to be provided for achieving positioning, so that positioning is complex, and cost is high. According to the technical scheme, the aluminum veneer color printing equipment is characterized in that the aluminum veneer color printing equipment comprises a workbench, a first long edge positioning plate and a first short edge positioning plate which are vertically distributed are fixedly connected to the workbench, and a second long edge positioning plate and a second short edge positioning plate are slidably connected to the workbench. According to the aluminum veneer color printing equipment, through the ingenious matching design of the driving groove and the driving column, when the first driving rod and the driving rod move, the first sliding block and the second sliding block which are vertically distributed can be driven to slide synchronously, then the four faces of an aluminum veneer are gradually abutted tightly, accurate and rapid positioning is achieved, and the production efficiency is improved. And the positioning process can be realized by only one power source, so that the equipment cost is reduced.

The application relates to the technical field of packaging boxes, in particular to a packaging color box surface printing process, which comprises a feeding process, a printing process and a discharging process. In the feeding process, a clamp is used to send the packaging box to the position of a transfer roller on a printing equipment rack. In the printing process, a color printing pattern on a transfer paper is transferred to the outer side wall of the packaging box through the transfer roller on the printing equipment rack. In the discharging process, the clamp is used to send the packaging box to the discharging position for discharging. The clamp composed of a main shaft, a mounting column and a clamping plate supports and clamps the inner side wall of the packaging box, so that the packaging box can stably abut against the side wall of the transfer roller in the printing process, the transfer effect is effectively guaranteed, and the printing forming effect of the color box surface is guaranteed.

The invention relates to the technical field of paper box production, and discloses an environment-friendly color printing paper box production technology and production equipment thereof.The environment-friendly color printing paper box production technology comprises a rack, and a conveying belt used for conveying paperboards is arranged on the rack; a distributing and spraying assembly is arranged on the machine frame and comprises a rotary drum and a groove drum, gloss oil is contained in the groove drum, the groove drum is rotationally connected to the interior of the rotary drum, multiple rows of liquid holes are formed in the rotary drum, a long groove is formed in the bottom of the groove drum, and the rotary drum can rotate to enable the multiple rows of liquid holes to sequentially pass through the lower portion of the long groove. Gloss oil in the groove drum can drop onto a paperboard below through the liquid hole below the long groove; and two coating rollers are rotationally mounted on the rack. Through the arrangement of the distributing and spraying assembly, in the rotating process of the rotary drum, gloss oil can be sequentially dropped on a paperboard through the multiple rows of liquid holes, the technical effect of evenly distributing and spraying the gloss oil is achieved, and uneven coating caused by gloss oil accumulation is avoided.

The utility model discloses a split four-color printing machine which comprises a printing machine body, the left side of the top of the printing machine body is fixedly connected with a box body, the top of the box body is fixedly connected with a shell, an inner cavity of the shell is fixedly connected with a mounting plate, and the top of the mounting plate is fixedly provided with an air heater. An air suction pipe is fixedly connected to one side of the air heater, a filter head is fixedly connected to one side of the air suction pipe, an air outlet pipe is fixedly connected to the side face of the air heater, and an air outlet head is fixedly connected to the bottom of the air outlet pipe. By means of the air heater, negative pressure of the air heater can be effectively utilized to generate suction force, the air suction pipe is driven to absorb air, the air is converted into hot air through the air heater, then the hot air is discharged through cooperation of the air outlet pipe, the air outlet head and the air outlet, and meanwhile the air enters the inner cavity of the box body through the through hole to heat and dry printed paper. And the later winding work is facilitated.

This application relates to the field of 3D printing technology and provides a method for determining the pixels of slices in a 3D model and an inkjet printing method. The method for determining the pixels of slices in a 3D model includes: generating multiple slices of the 3D model, each slice having multiple contour pixels; determining the color of a shell pixel of the first slice based at least on the colors of the contour pixels of a first slice and an adjacent second slice, wherein the shell pixel is inside the first slice relative to the contour pixels. Using this method, the color information of each pixel in each slice of the 3D model can be accurately determined, enabling precise 3D color printing.

A plastic product, for example a cartridge, comprises at least 5 wt. % to 100 wt. % recycled material. A method for manufacturing such a plastic product may include providing a partially recycled material comprising at least 5 wt. % recycled material and applying an injection molding or extrusion process to produce the base body of the plastic product. The base body is pre-treated, and a white paint is applied as a base coat to a print area located on the outside of the base body as a primer for subsequent (e.g., color) printing. The method then includes directly printing on the white base coat of the print area using direct digital printing.

This invention discloses an ink monitoring and adjustment system for color printing, relating to the field of ink monitoring and adjustment technology. It includes an intelligent adjustment terminal for controlling data transmission and information interaction between various modules; a database system for storing historical work orders and priority work order numbers; and a work order platform for generating work orders to be completed. The invention first filters all work orders to be completed in the work order platform to determine real-time work orders. Then, it matches and analyzes historical work orders with real-time work orders to determine the predicted ink consumption per unit font. Finally, it compares the predicted ink consumption per unit font with the ink usage in historical work orders to determine the total ink consumption of the real-time work orders and the status of the color printing press. This method not only avoids excessive or insufficient ink addition but also monitors the status of the color printing press in real time, enabling timely repair of abnormal color printing presses and extending their service life.

The present application relates to the technical field of industrial vision detection, and discloses a green color printing surface defect detection method based on computer vision. The method comprises the following steps: collecting real-time image flow and performing multi-scale decomposition to generate a feature vector sequence; constructing a dynamic defect template set by using a generative adversarial network; encoding features by using a convolutional neural network, calculating a similarity matrix with the template set, and generating a defect matching index; adjusting the detection threshold value adaptively according to the defect matching index, and obtaining a defect probability distribution map through clustering analysis; identifying a defect aggregation area through space-time domain analysis, and starting a local re-inspection mechanism; updating a defect feature prototype library and optimizing network weights by using re-inspection data, and forming a self-learning closed loop; and finally performing full-process quality consistency inspection and outputting a report. The present application realizes dynamic adaptation and continuous optimization of the detection process.

This utility model discloses a tapered, ventilated printing rod with improved precision, belonging to the field of printing equipment technology. It includes a printing rod body with a hollow air channel inside. One end has a feed air hole and an outward-facing oblique air hole distributed circumferentially, and an inlet ramp at the edge. The other end has a tapered guide head with a self-locking tension cap threadedly connected to it and a wrench-operated slot. The tapered guide head also has an air inlet. The hollow air channel connects the air inlet, the feed air hole, and the outward-facing oblique air hole. This printing rod allows for quick assembly and disassembly via the self-locking tension cap, ensures precise alignment between the printing rod and the equipment, and the inlet ramp assists in the smooth installation of the flexible hose. Combined with uniform airflow, the hose expands and fits tightly, effectively solving the problems of cumbersome assembly and disassembly and large registration deviations in multi-color printing in existing technologies. This improves printing precision and efficiency, and features a simple structure and low cost.

The injection molding part with the local three-dimensional textures structurally comprises an injection molding layer and an adhesion layer which are formed in an injection molding cavity in a press fit mode, and a bonding layer is arranged between the injection molding layer and the adhesion layer. The adhesion layer comprises a base layer, the base layer is provided with a first surface and a second surface which are oppositely arranged in the thickness direction of the base layer, the first surface is a display surface, and the second surface is a combination surface; a middle coloring layer, a local UV color printing layer or a local UV color printing layer, a first UV texture layer or a UV three-dimensional texture layer and a bottom coloring layer are sequentially arranged on the bonding surface from inside to outside; the bonding layer is positioned between the injection molding layer and the bottom coloring layer; the method has the advantages that a plurality of three-dimensional texture subareas can be formed, the three-dimensional texture effect of a local area can be more obvious, and in addition, the glossiness of the local three-dimensional texture can be increased.

The utility model relates to printing equipment technical field discloses a cam phase difference superposition compensation mechanism of multicolor printing machine, including printing frame, the top of printing frame is installed with correction mechanism, the bottom fixed connection of printing frame has the supporting plate, the outer wall of supporting plate is installed with tension adjusting mechanism, the correction mechanism includes sealing box no.

The utility model provides a novel printing device, which relates to the technical field of printing, and comprises a base, a heating device, a stand column, a top cylinder, a bottom cylinder, a supporting assembly, a cross rod, a base plate, a pressing frame, a locking fastener, a boss, a fixing block, a mounting frame, a pulley, a first elastic piece and a printing assembly, the printing assembly comprises a rocker, one end of the rocker is rotatably connected with the top cylinder, and the other end of the rocker is rotatably connected with the bottom cylinder. The other end of the rocker is provided with a silk-screen printing module, the rocker is connected with the top cylinder through a second elastic piece, when the printing device is used, multiple printed materials can be continuously printed, in the printing process, the printed materials can be dried in time, and after one round of printing is completed, the printing efficiency is greatly improved. By converting the silk-screen printing modules of the corresponding colors, printing of another color can be continuously conducted on the printing stock, and through round-by-round color printing until all printing work is completed, the waiting time can be effectively shortened, and the printing efficiency is improved.

The utility model relates to the field of molds, in particular to a film mold which comprises a mold head and a material injection seat connected to the mold head, the mold head is provided with a cavity, at least two material injection openings are formed in the end face of the mold head at intervals, a plurality of guide runners are formed in the inner walls of the material injection openings at intervals, and feeding openings are formed in the surface, facing the material injection openings, of the material injection seat in a one-to-one correspondence mode. A sizing material sequentially passes through the feeding port and the injection port and enters the cavity from the guide runner, a discharging port is formed in the end face, away from the injection base, of the die head and communicates with the cavity, and the sizing material in the cavity is extruded through the discharging port to form a film. Through the arrangement of the guide runner, sizing materials with two colors are sequentially distributed in the cavity in a staggered mode, the sizing materials in the cavity are extruded out through the discharging port to form zebra-shaped films with the two colors arranged in a staggered mode, the films do not need to be subjected to color printing coloring any more, the film processing steps are reduced, the film processing period is shortened, and the production efficiency is improved. Therefore, the processing cost of the film is reduced.

The utility model provides color printing ink curing equipment which comprises a rack arranged on the ground, an open type shell is installed on the rack, an ink curing unit is arranged in the open type shell, the color printing ink curing equipment further comprises an air exhaust hood, the air exhaust hood is connected with a wall top through a plurality of connecting rods, the air exhaust hood is located over the open type shell, and the air exhaust hood is connected with the wall top through a plurality of connecting rods. The upper portion of the air exhaust cover is connected with an air guide pipe, the lower portion of the air exhaust cover is connected with an annular blocking cylinder, the blocking cylinder is of a through structure in the vertical direction, the two ends of the blocking cylinder are connected with main fixing ropes, the main fixing ropes are connected with hasps, and the end face of the open type shell is connected with connecting rings matched with the hasps through adjustable structures. Auxiliary fixing ropes are connected to the two sides of the blocking cylinder, strong magnets are connected to the auxiliary fixing ropes, and the strong magnets can be attracted to the side faces of the open type shell.

The utility model discloses a quick-drying device for hand bag color printing, which comprises a drying box and a transmission mechanism located in the drying box, the transmission mechanism comprises a transmission frame, the transmission frame is fixedly connected between two sides of an inner cavity of the drying box through a connecting plate, and the utility model relates to the technical field of hand bag color printing. According to the quick-drying device for hand bag color printing, transmission is conducted through the transmission belt on the transmission mechanism, the transmission belt can drive the multiple double-hook frames to conduct transmission, the multiple double-hook frames can sequentially penetrate through the drying box, then a hand bag is hung on the double-hook frames and passes through the drying box, and color printing on the two sides of the hand bag can pass through the two rotating pipes at the moment; the air outlet pipe is ventilated through air extraction of the air blower, the air outlet pipe can ventilate the rotating pipe through the connecting pipe, the rotating pipe can guide heat of the electric heating plate to the middle, hot air is blown to color prints on the two sides of the hand bag at the same time, therefore, the hand bag can be dried rapidly, and the color printing and drying efficiency of the hand bag is improved.

The invention discloses an adjustable multicolor silk-screen printing platemaking positioning structure and a using method thereof, and relates to the technical field of multicolor silk-screen printing platemaking, the adjustable multicolor silk-screen printing platemaking positioning structure comprises a fixing frame and a hand wheel, an extension frame is arranged on one side of the fixing frame, and a fixing assembly used for auxiliary fixing is installed in the extension frame; the fixing assembly comprises a transverse lead screw, a first fixing plate, a longitudinal lead screw, a second fixing plate and a horizontal plate, and the first fixing plate is installed on the outer surface of the transverse lead screw in a threaded mode. According to the adjustable multicolor silk-screen printing platemaking positioning structure and the using method thereof, positioning is accurate, adaptability is high, multicolor overprinting quality is guaranteed, the first fixing plate and the second fixing plate are driven by the transverse lead screw and the longitudinal lead screw to achieve platemaking transverse and longitudinal accurate positioning, the extending frame corner datum design is matched, a to-be-printed plate can be rapidly fixed, and the working efficiency is improved. And the replacement requirements of different colors and different sizes of plate making can be conveniently met, overprinting errors caused by positioning deviation are effectively avoided, and the printing yield is increased.

The invention relates to the technical field of carton printing equipment, and discloses an automatic feeding device for carton color printing and a using method thereof. When the positioning shaft moves upwards, a second pushing plate can be driven to synchronously move upwards, at the moment, the second pushing plate rotates around the positioning shaft, the side wall of the second pushing plate and the side wall of a first pushing plate are located on the same plane when the second pushing plate integrally moves upwards, and at the moment, the side wall of the second pushing plate makes contact with the side wall of stacked paperboards; therefore, slight friction force can be generated when the second pushing plate moves upwards, upward acting force is applied to the paperboards, and the situation that when the stacked paperboards move towards the color printing device through a conveying belt at the top of the main body, the paperboards are conveyed obliquely, and the paper boards are conveyed obliquely is reduced. When the bottom paperboard moves, the paperboard located above falls down under the action of gravity and then makes contact with the bottom paperboard, so that part of the paperboards are folded, the side walls of the paperboards are kept flat, and the overall quality of automatic color printing feeding of the device on the paperboards is improved.

This utility model relates to the field of color-printed paper box processing technology, and discloses a cutting device for raw materials in color-printed paper box production and processing. It includes a fixed platform, a shifting component fixedly mounted on one side of the fixed platform, a cutting table fixedly mounted on one side of the shifting component, a cavity inside the cutting table, a rotating component fixedly mounted inside the cavity, a rotating plate fixedly mounted on the top of the rotating component, a support frame fixedly mounted on the top surface of the fixed platform, and a hydraulic rod fixedly mounted on the top surface of the support frame. This cutting device for raw materials in color-printed paper box production and processing, by adjusting the components and cutting blades, places the color-printed paperboard onto the rotating plate. A B servo motor drives the adjusting screw to rotate, causing two sets of cutting blades to move in opposite directions, adjusting the spacing. The hydraulic rod drives the cutting blades to press down and cut the edges of the color-printed paperboard, achieving the effect of cutting edges on color-printed paperboard of different sizes, with high adaptability.

The invention relates to the technical field of color printing processing, in particular to a feeding mechanism for a color press, which comprises a main body unit, a support, a first conveying belt arranged on the support, a second conveying belt arranged on the support, a material guide unit, an upper material guide assembly arranged at the output end of the first conveying belt, and a lower material guide assembly arranged at the output end of the second conveying belt. The lower guide assembly and the transfer unit are arranged at the input end of the second conveying belt. Through the linkage design of integrating the material guiding unit and the transferring unit, the whole process of stable connection of workpieces from feeding, overturning to discharging is achieved, the structure is simple and compact, operation and use are easy and convenient, the use and maintenance cost can be reduced, the feeding efficiency is effectively improved, the continuity and stability of the production process are guaranteed, the overall production efficiency can be further improved, and the production cost is reduced. Through the overturning transition structure of the lower material guide frame, the problems that the printing face of the workpiece is prone to abrasion and patterns are prone to damage in the feeding process can be reduced, and the printing quality and the yield of double-face color printing products can be further improved.

The invention discloses a moisture-proof color printing paperboard and a preparation process thereof, and belongs to the technical field of color printing paperboards, the moisture-proof color printing paperboard comprises a base plate layer, and the top and the bottom of the base plate layer are sequentially provided with a moisture-proof layer, a ground color coating, a color printing layer and an outer surface protection layer from inside to outside; the moisture-proof layer comprises water-based resin and nano particles; and the outer surface protection layer comprises hydrophobic polymer resin. By arranging the base plate layer, the moisture-proof layer, the ground color coating, the color printing layer and the outer surface protection layer, the problems that although moisture resistance of an existing moisture-proof color printing paperboard is improved through film covering or surface coating of gloss oil, the film covering technology is complex, cost is high, and environment friendliness is not achieved are solved; a coating formed by common gloss oil is thin, easy to wear and poor in moistureproof durability, and can influence recycling of paperboards.

The invention provides a multi-color printing control method and device, printing equipment and a storage medium, and the method comprises the steps: receiving printing data which comprises at least two pieces of image data which correspond to label paper and need to be subjected to color development at different temperatures; determining at least one overlapping area with color rendering overlapping in the image data; when the printing data is printed on the label paper, the heating temperature of the overlapping area is controlled according to the color development priority rule of the overlapping area, the color development priority rule is used for indicating that only color development of the preferable image data is carried out on the overlapping area, and the preferable image data is one of the image data including the overlapping area. According to the multi-color printing control method, color mixing interference caused by multiple times of heating at different temperatures in a color development overlapping area can be avoided fundamentally, the color accuracy and visual definition of printing data are ensured, and the risk that due to multiple times of heating, the temperature is too high due to high-temperature accumulation of a local area, and then label paper is carbonized and burnt can be avoided.

The present application relates to the technical field of 3D printing, in particular to a processing step and method of a coating process TPU. The present application uses the post-processing technology of the formed part to process the formed part, which not only improves the FDM printing speed by 3-4 times, can realize the successful printing of complex models that cannot be realized in the FDM printing process of TPU, and breaks through the color printing of flexible materials. Moreover, after the processing of the formed part, the interlayer bonding force is greatly increased, and the surface effect is equivalent to the SLA surface fineness. Such a process not only breaks the limitation of 3D printing that can only print single color with special design shoes, but also greatly reduces the printing equipment cost, the formed part printing cost, improves the efficiency, realizes color printing, and more importantly, the printed object can be directly worn. At the same time, the hardness of the formed part of the present application will be maintained at about 70A, which is suitable for printing various wearable products and is suitable for various industries.

The invention discloses multi-station parallel operation printing equipment and a control method. The multi-station parallel operation printing equipment comprises a moving mechanism, a plurality of printing stations, a sliding rail mechanism, a plurality of printing mechanisms and a feeding and discharging mechanism. The head end and the tail end of the sliding rail mechanism are connected to form a closed machining channel. The moving mechanism is movably arranged on the sliding rail mechanism and used for clamping the multiple products and driving the multiple products to move on the machining channel. The multiple printing stations are sequentially arranged on one side of the machining channel in the y-axis direction, and each printing station is provided with a printing mechanism. And the feeding and discharging mechanism is arranged on the other side of the machining channel, and the feeding and discharging mechanism is used for clamping the to-be-printed product to the moving mechanism and taking down the printed product from the moving mechanism. The multi-color printing system has the beneficial effects that the overall efficiency of multi-color printing is greatly improved, and parallel operation of multiple products is achieved; complete separation of feeding, discharging and printing procedures is achieved, and work waiting is eliminated.

The utility model relates to the technical field of efficient cleaning of printing machine cylinders, and discloses an automatic cleaning four-color printing machine cylinder structure which comprises a first rack, the bottom of the first rack is fixedly connected with a supporting table, the inner wall of the rear side of the supporting table is fixedly connected with a second motor, and the output end of the second motor is fixedly connected with a gear. A rack is connected to the upper side of the gear in a meshed mode, a movable concave block is fixedly connected to the upper side of the outer wall of the rack, a first fixing column is fixedly connected to the middle of the front side of the movable concave block, a wiping cylinder is fixedly connected to the rear side of the inner wall of the first rack, and a solution spray head communicates with the front side of the inner wall of the first rack. According to the roller cleaning device, the roller is driven to move through movement of the movable concave block, cleaning agents are evenly sprayed to the surface of the roller through the solution tank, then the transmission rod is driven to rotate through the motor, and therefore the roller brush is driven to deeply clean the surface of the roller, and then the roller is cleaned through the cleaning spray head.

The utility model relates to the technical field of printing machinery, and discloses a four-color printing device convenient for replacement of various pigments, which comprises a bottom plate, a base is fixedly connected to the upper surface of one side of the bottom plate, a clamping plate is arranged in the base, a positioning component is arranged in the clamping plate, a pigment box is fixedly connected to the upper surface of the clamping plate, and the pigment box is fixedly connected to the lower surface of the bottom plate. A painting pipe is arranged at one end of the paint box, a clamping column is arranged in the first spring, a fixing ring is fixedly connected to the outer wall of one side of the clamping column, a pull ring is arranged at the end, away from the fixing ring, of the clamping column, the outer portion of the second spring is arranged in a clamping plate, and positioning plates are arranged at the two ends of the second spring. According to the paint box, the clamping column is pulled through the pull ring, meanwhile, the fixing ring compresses the first spring, the clamping plate is inserted into the base, the positioning plate is clamped into the positioning groove to complete positioning, the paint box can be disassembled by pulling the pull ring out, and therefore the effects that the paint replacement time is shortened, and the production efficiency is remarkably improved can be achieved.