303 results about "Color printing" patented technology

The invention discloses a method for carrying out layered color mixing printing on plane color content by using an FDM printer based on a multilayer color reverse solution algorithm, and belongs to the technical field of 3D printing, and the method comprises the following steps: step 1, carrying out vectorization conversion on color information of an input image to obtain a preprocessed image with a clear contour and pure color; and 2, building a multilayer color reverse solving system based on an improved Kubelka-Munk model, reversely and accurately calculating color values of all layers, and ensuring that the color of each layer strictly conforms to the actual color generation capability range of the consumable. And step 3, carrying out layer-by-layer printing on the layering result according to a specific thickness and sequence, and finally presenting the original picture color on the contact surface of the printed piece and the hot plate. The method has the advantages that patterns with richer colors can be presented on the surface layer of a printed piece, and the limitation that the color of a printing material is limited in presentation in FDM multi-color printing is improved; meanwhile, under the condition that the printing process and hardware iteration cost are not increased, richer color selection is achieved.

The invention discloses a two-color printing method based on a thermal printer. The two-color printing method comprises the steps that a two-color printing mode is started; performing color configuration on different types of to-be-printed information, and respectively setting the to-be-printed information as a first color and a second color; converting the character data to be printed into dot matrix data; according to the color configuration, converting the dot matrix data into double-color printing dot matrix data according to a double-color printing data encoding format; the control chip of the thermal printer separates second color printing data from the two-color printing dot matrix data, and respectively restores all the two-color printing dot matrix data and the second color printing data into 1-bit single-color printing dot matrix data; calculating the first color heating time and the second color heating time of the double-color thermo-sensitive paper according to the restored double-color printing dot matrix data and the second color printing data; and according to the first color heating time and the second color heating time, the printing head is controlled to heat the two-color thermo-sensitive paper in a time-sharing mode, and two-color printing is achieved. The printing information identification degree can be improved.

The present application relates to the technical field of textile design, and particularly relates to a method for improving fabric image color distortion by superimposing and developing color of sanding, which comprises the following steps: (1) CMYK four-color yarn design; (2) jacquard CAD design; (3) weaving of grey fabric; (4) dyeing and finishing of the grey fabric; the dyeing and finishing of the grey fabric comprises sanding after light bleaching and fading treatment of the grey fabric. The present application adopts the design method of superimposing and developing color of color image fabric, the color developing mode of color mixing of jacquard CAD technology, and designs through the spinning form of colored weft yarn, jacquard CAD and dyeing and finishing, produces the effect of mutual color bleeding and color mixing of color materials of CMYK four-color yarn through fading treatment, and then carries out sanding treatment, so that the fine and dense fluff of the color yarn is superimposed with the effects of color transmission and improvement of complete covering, the color yarn is subjected to color transmission and superimposed color mixing again, the color is softer and more real by adopting the mode similar to the superimposition of four plates of CMYK color printing.

The invention provides a multi-color printing control method, device and system of a thermal transfer printer, which are applied to a system comprising an editing and typesetting terminal and a thermal transfer printing mechanism, and the thermal transfer printing mechanism is provided with at least two printing heads which are respectively provided with colored tapes with different colors. The method comprises the following steps: acquiring a design page containing images and texts with various colors at an editing and typesetting terminal; identifying the color of each currently available color tape of the thermal transfer printing mechanism to form an available color set, and establishing a corresponding relationship between each printing head and the color of the color tape of the printing head; analyzing the design page pixel by pixel, matching the color of each pixel with the available color set to determine the target available color of the pixel, and merging the pixels with the same or similar target available colors into a corresponding printing object; distributing the printing objects to printing heads corresponding to the target available colors of the printing objects, and generating printing data of the printing heads based on distribution; and the printing data are sent to a thermal transfer printing mechanism, so that a multi-color printing task is completed.

The utility model discloses a textile digital color hot stamping and gold stamping integrated printing production line which comprises a UV printing device, an automatic powder scattering and shaking device and a drying device. The UV printing device is provided with a UV curing lamp and at least three independent printing nozzles. The color printing nozzles are used for printing color UV printing ink and simulated color UV printing ink, the white printing nozzle is used for printing white UV printing ink, and the gloss oil printing nozzle is used for printing gold stamping gloss oil. The gold stamping and flocking device has the advantages of low cost, high speed, high efficiency and no influence on impression after gold stamping or flocking shedding.

The present application relates to a kind of color 3D printing device and use method of supporting waste online synchronous recovery.The 3D printing device includes device frame, and color printing nozzle can be moved along front, back, left and right on device frame.Model printing base station can be moved along up and down direction on device frame, and waste synchronous recovery mechanism is arranged on device frame, and waste synchronous recovery mechanism includes waste printing base station, first roller, second roller and roller drive motor are arranged on waste printing base station, and conveyor belt is arranged on first roller and second roller.Model chuck for recycling filament waste is arranged on device frame behind conveyor belt, and chuck drive motor is arranged on device frame.Problem of recycling and utilizing waste produced by color FDM printing is effectively solved, and deficiency of current waste recycling and reusing equipment is made up, more suitable for waste recovery of consumer-grade color 3D printing application scene, and material utilization is improved.

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.

According to the energy-saving and noise-reducing printing head with the weak electromagnetic eddy current, a unique printing needle arrangement method is adopted, 24 needles are asymmetrically grouped according to 8 needles and 16 needles, and through longitudinal offset of odd and even groups and precise transverse staggered layout, it is ensured that any two needles are in different columns, and the transverse distance is integer multiples of the non-standard dot distance; therefore, single-needle time sequence striking is achieved, noise superposition is avoided fundamentally, and peak current is reduced. In addition, an ingenious guide slide structure is further arranged to solve the problem of high-density needle threading, a cross groove is formed in a magnetic pole to restrain eddy current and reduce heating, and an arc chamfer is arranged at a needle tip to greatly reduce the current value. The printing head has the remarkable noise reduction and energy saving effects, the printing quality and the production efficiency are improved, and the multiple problems that in the prior art, printing noise is large, energy consumption is high, and color mixing is prone to occurring in double-color printing are effectively solved.

The utility model belongs to the technical field of printing, and discloses a high-speed constant-tension multicolor printing machine which comprises a mounting plate, a multicolor printing machine body and a fixing frame, three rotating rollers are horizontally and rotatably arranged on the fixing frame, the mounting frame is arranged on one side of the mounting plate, a sliding frame is vertically and slidably arranged on the mounting frame, and a driving assembly is arranged on the mounting frame. A driving roller is rotationally arranged on the mounting frame, a driven roller is rotationally arranged on the sliding frame, a fixed seat is arranged on the mounting frame, a driving motor is horizontally arranged on the fixed seat, an output shaft of the driving motor is connected with a roller shaft of the driving roller, and a linkage assembly is arranged on the fixed frame and used for enabling the driving roller and the driven roller to synchronously and reversely rotate. When a printing film is printed in the multi-color printing machine body, the two sides of the printing film are limited by the driving roller, the driven roller and the rotating roller correspondingly, so that the tension of the printing film in the printing process can reach a constant state, and the overall attractiveness and quality of a printed product are guaranteed.

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 utility model provides a blanking and collecting mechanism for green and environment-friendly packaging box color printing, which is characterized by comprising a blanking guide plate, a support and an end limiting plate, the support is provided with three belts driven by a driving motor to run synchronously, the blanking guide plate is mounted on the support, and the end limiting plate is mounted on the support. The end limiting plate is connected to the support through a first position adjustable assembly, the end limiting plate is connected with two side limiting plates through a second position adjustable assembly, the end limiting plate and the two side limiting plates form a U-shaped buffering part, a mounting plate is fixed to the support, and the mounting plate is connected with the end limiting plate through a second position adjustable assembly. The mounting plate is provided with two supporting plates through a lifting structure, and the supporting plates can transfer the packaging boxes at the U-shaped temporary storage part to the belt.

The utility model relates to the technical field of color printing carton processing, in particular to an auxiliary fixing mechanism for color printing carton processing, which comprises two symmetrically arranged racks, two sliding rods parallelly mounted between the two racks, a plurality of pressing frames equidistantly mounted on the two sliding rods and rubber pressing rollers rotatably mounted on two sides of the lower ends of the pressing frames. And a transverse frame is fixedly connected between the middle parts of the upper ends of the two racks. According to the automatic correction device, an original auxiliary fixing mechanism is scientifically and reasonably improved, and the transverse frame, the rotating rod, the transmission connecting rod, the transmission sliding column, the servo motor, the image acquisition module and the microcomputer controller are arranged between the rack and the two sliding rods, so that automatic correction operation can be carried out on a color printing paperboard in the auxiliary fixing process; according to the auxiliary fixing mechanism, the color printing paperboards can be quickly adjusted to be in a regular state, the problems of deviation, dislocation and the like in the conveying process of the color printing paperboards are effectively reduced, and therefore the functionality and the machining stability of the auxiliary fixing mechanism are improved.

The utility model belongs to the technical field of color printing film cutting equipment, and particularly relates to cutting equipment for color printing film production, which is characterized in that a rotary drum, a sliding chute, a baffle, a gear and a toothed plate are arranged, during use, a color printing film to be cut is placed on the upper side of a workbench, a hydraulic cylinder drives a lifting plate, a cutter and the gear to move downwards, and meanwhile, the cutting device is used for cutting the color printing film. A motor drives a lifting screw rod to rotate, so that a toothed plate and a gear move synchronously, then the gear does not rotate, a cutting knife stably moves downwards to conduct cutting, when the cutting knife is replaced, a new cutting knife is placed into a sliding groove in one side of a rotating cylinder, then the toothed plate moves to drive the gear to rotate, the rotating cylinder is made to turn over up and down, and then the cutting knife is replaced. And a new cutting knife is rotated to the lower side of the lifting plate, a baffle is matched with one end of a sliding groove to limit the cutting knife, and then an old cutting knife is taken out, so that the cutting knife can be conveniently replaced only by rotating a rotary drum, the influence of replacement on the device work is reduced, and the practicability of the device is improved.

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 a UV color printing device for a multi-layer co-extrusion infusion film, and relates to the technical field of infusion film printing equipment. An ink box is fixedly installed on one side of the supporting frame through a reinforcing plate, and a printing roller is arranged in the ink box. A pressing roller is further mounted on the supporting frame in a matched manner; the pressing roller is attached to the printing roller. A housing is fixedly mounted at the top of the support frame, and an exhaust fan is mounted on the housing; an ultraviolet irradiation device is fixedly mounted at the bottom of the housing; during use, the feeding roller wound with an infusion film is placed on the feeding supporting frame, the infusion film sequentially passes through the first guide roller and the second guide roller to be conveyed to the winding roller on the discharging supporting frame, and the printing effect in the infusion film conveying process is achieved; when a liquid conveying film passes through the position between the printing roller and the pressing roller, rotation of the printing roller is achieved through the liquid conveying film, and therefore the printing roller can effectively print an ink box on the surface of the liquid conveying film, through cooperation of the pressing roller, the printing quality is effectively guaranteed, and the incomplete situation is avoided.

The utility model relates to the technical field of cutting equipment, in particular to color printing film cutting equipment for water transfer printing paper, which comprises a cutting table. When the device works, one end of a color printing film roll on the outer wall of a rotating roller is pulled out and bypasses a guide roller, one end of a piston rod of a first electric cylinder extends to drive a T-shaped block to move leftwards, the T-shaped block drives a transmission rod to jack a top plate upwards, the top plate drives a pressing plate to move upwards, a spring is compressed, and a motor drives a lead screw to rotate clockwise; a nut seat moves leftwards along the outer side wall of a lead screw to drive a mounting frame to move leftwards, one end of a color printing film roll is placed below a pressing plate, a first electric cylinder drives a T-shaped block to move rightwards, a spring extends to drive the pressing plate to move downwards to press a color printing film, a motor drives the lead screw to rotate anticlockwise, and the nut seat moves rightwards to drive the mounting frame to move rightwards; the color printing film can be pulled out by the required length, and one end of the piston rod of the second electric cylinder extends to drive the cutter to move downwards so as to cut the color printing film.

The utility model relates to a micropore punching device for producing a film-coated color printing plastic woven bag, which comprises a rack, a feeding mechanism and a punching mechanism are arranged on the rack, the feeding mechanism comprises a driving feeding wheel and a driven feeding wheel, and the punching mechanism is arranged on the driving feeding wheel. Two rows of driving feeding wheels are rotationally arranged on the inner walls of two side plates of the rack correspondingly, the driving feeding wheels are in transmission connection with a first motor arranged on the rack, and the multiple driven feeding wheels are rotationally arranged on the rack and vertically opposite to the multiple driving feeding wheels in a one-to-one mode. The punching mechanism comprises a needling roller with a plurality of rows of needling needles arranged on the circumferential face, and the needling roller is rotationally arranged between the two side plates of the machine frame and is in transmission connection with a second motor arranged on the machine frame. According to the micropore punching device for production of the film-coated color-printed plastic woven bag, micropore punching machining of the plastic woven bag is achieved, meanwhile, the micropore punching device can be well connected with the previous and later production processes of a plastic woven bag production line, and therefore production automation is achieved, efficiency is improved, and manpower is saved.

The invention discloses local spot printing equipment for packaging box color printing, and relates to the technical field of packaging box color printing. Comprising a machine body and a supporting plate, the supporting plate is provided with a positioning plate and a deviation rectifying assembly, the deviation rectifying assembly comprises a plurality of deviation rectifying blocks located on the circumferential side of the positioning plate and used for correcting and positioning the position of a packaging box, the adsorption assembly comprises a plurality of adsorption holes formed in the positioning plate and the deviation rectifying blocks, a main guide pipe is slidably connected into the positioning plate, and the main guide pipe is connected with the adsorption holes. An auxiliary guide pipe is slidably connected into the deviation rectifying block and used for switching the adsorption position, the adjusting assembly comprises a plurality of adjusting plates slidably connected with the deviation rectifying block, when the adjusting plates are located outside the deviation rectifying block, the positioning plate generates adsorption force to adsorb and level a packaging box, the deviation rectifying block rectifies the packaging box, and the adjusting plates are located outside the deviation rectifying block. When the adjusting plate is located in the deviation rectifying block, the deviation rectifying block does not slide any more and generates adsorption force to fix the packaging box. According to the positioning and leveling device, the packaging box can be automatically and adaptively positioned, leveled and fixed.

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 application relates to a constant-temperature ink printing device based on four-color printing, which is applied to the technical field of printing devices. A rack is provided with a feeding mechanism and a collecting mechanism for placing a cloth roll to be printed. A first printing mechanism and a second printing mechanism are sequentially arranged between the feeding mechanism and the collecting mechanism. The end of the cloth roll is fixed to the collecting mechanism after sequentially passing through the feeding mechanism, the first printing mechanism and the second printing mechanism. A cleaning mechanism is arranged at the first printing mechanism and the second printing mechanism of the rack respectively, and the cleaning mechanism is used for cleaning ink on the first printing mechanism and the second printing mechanism. The application has the effect that the cloth reciprocally moves between the first printing mechanism and the second printing mechanism, the first printing mechanism and the second printing mechanism alternately print on the cloth, the length of the production line is shortened, and the production area occupied by the printing device is reduced.

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.

The utility model discloses a centering device for four-color printing, which comprises a four-color printing machine and a printing box below the four-color printing machine, the printing box is arranged below the four-color printing machine, a printing head of the four-color printing machine extends to the inner side of the printing box, and a conveying belt is transversely arranged in the printing box. One transmission roller in the conveying belt is fixedly connected with the output end of an external motor through a coupler, and two belt type guide rails are arranged above the conveying belt in parallel; according to the four-color printing machine, the printing box is arranged below the printing head of the four-color printing machine, the printing frame with the belt type guide rail is arranged on the conveying belt of the printing box, and the placing panel arranged in the printing frame in a sleeving mode through the sliding rod is pushed, so that a to-be-printed product can move along the surface of the sliding rod along with the placing panel; the effect of flexibly adjusting the printing position of the to-be-printed matter is achieved, centering of the to-be-printed matter is facilitated, and the printing position of the to-be-printed matter is matched with the position of a printing roller of the four-color printing machine.

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.

The invention relates to the technical field of packaging box processing, and particularly discloses a UV coating treatment process for a color printing packaging box. The color printing packaging box UV coating treatment process comprises the following steps that S1, an alkaline water-based cleaning agent is used for pretreating the surface of a printing stock; s2, mixing the epoxy acrylate resin, the polyurethane acrylate resin and the reactive diluent to form a premixed solution; s3, adding a photoinitiator and nano silicon dioxide into the premixed solution, and dispersing at a high speed to obtain UV coating slurry; s4, uniformly coating the UV coating slurry on the surface of a printing stock; s5, the coated printing stock is preheated; and S6, the coating is subjected to ultraviolet curing through a mercury lamp. The UV coating treatment process for the color printing packaging box can be used for surface strengthening treatment of high-end packaging products such as electronic product packaging boxes and cosmetic packaging boxes, and has the advantages that the mechanical strength and toughness are synergistically improved, and the durability of the coating is enhanced.

The invention discloses an image printing method suitable for multi-level high-fall natural slate, and relates to the technical field of printing, and the method comprises the following steps: S1, rock surface characteristic analysis: the section fall delta h and the edge inclination angle theta of the natural slate are obtained through three-dimensional scanning, delta h represents the vertical height difference of adjacent levels, and theta is the included angle between the edge tangent plane and the horizontal plane; s2, dynamic parameter modeling: on the basis of delta h and theta, a bottom layer shrinkage coefficient C1 and an upper layer expansion coefficient C2 are calculated through RIP control software, C1 is dynamically adjusted to be 0.8-1.2 pixels according to delta h, and C1 = 1.2, delta hlt when delta h is larger than or equal to 8 mm; when the thickness is 8 mm, C1 is equal to 0.8 + 0.05 delta h; c2 is dynamically adjusted to be 1.0-1.5 pixels according to theta, and C2 is equal to 1.0 + 0.03 theta; s3, ink dispersion compensation control: calculating the ink dispersion compensation value of each area according to Cadj = 0.15 delta h + 0.2 tan theta, and dynamically adjusting the ink jet pressure; s4, real-time trapping adjustment is conducted, specifically, when color printing and gold and silver hot stamping are overlapped, the nozzle distance d is monitored in real time, and when d-d0gt is detected; and when the thickness is 0.5 mm, the special image printing technology can adapt to the dynamic structure of slate, the natural texture is reserved, and the limit printing precision is achieved.