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354 results about "Offset printing" patented technology
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Offset printing is a commonly used printing technique in which the inked image is transferred (or "offset") from a plate to a rubber blanket, then to the printing surface. When used in combination with the lithographic process, which is based on the repulsion of oil and water, the offset technique employs a flat (planographic) image carrier. Ink rollers transfer ink to the image areas of the image carrier, while a water roller applies a water-based film to the non-image areas.
Visual detection algorithm for printed patterns of color box printed matters
InactiveCN120472131ACharacter and pattern recognitionBiological modelsLearning machineVisual technology
The invention relates to the technical field of printed matter quality detection and computer vision and the technical field of artificial intelligence systems in the production field, in particular to a color box printed matter printed pattern visual detection algorithm. The invention discloses a visual detection algorithm for a printing pattern of a color box printed matter. The visual detection algorithm comprises the following steps of image acquisition, preprocessing, feature extraction, reference comparison, defect evaluation and defect classification. According to the scheme, the accuracy and the real-time performance of complex printing pattern defect detection are improved. A light-weight multi-scale attention convolutional neural network and a self-learning mechanism are combined, defects in various printing patterns such as block colors, fine characters and graph gradient are effectively detected, and human intervention and misjudgment are reduced. A defect saliency map is generated through color normalization, geometric correction preprocessing and reference map comparison, an online misjudgment cache and incremental learning strategy is introduced, self-adaptive optimization of a model along with time is kept, and real-time high-precision quality monitoring of an offset printing color box production line is achieved.
Owner:SHENZHEN KEYANG PAPER PACKAGING CO LTD
Modified rosin phenolic resin, preparation method thereof and offset printing frosted ink
The invention relates to the technical field of novel resin and application thereof, in particular to modified rosin phenolic resin, a preparation method thereof and offset printing frosted ink. The modified rosin phenolic resin comprises silica powder grafted rosin phenolic resin, and the preparation method of the modified rosin phenolic resin comprises the following steps: preparing the silica powder grafted rosin resin, and modifying the phenolic resin by the silica powder grafted rosin resin. The resin is used for offset printing frosted ink, enables the frosted ink to be uniformly and stably transferred to the surface of a printing stock, is good in transfer property, uniform in frosted effect and good in concave-convex feeling, effectively enhances the adhesive force of a base material, is suitable for high-speed offset printing, and is excellent in printing adaptability.
Owner:SUZHOU KINGSWOOD COLOR TECH CO LTD
Color restoration control method and system of offset press
The invention belongs to the technical field of printing color management, and provides a color restoration control method and system for an offset printer, and the method comprises the steps: firstly, detecting easy-control parameters and real-time change parameters of the printer, and transversely dividing a printed electronic file into a plurality of areas with the same number as ink areas of the printer; a printed matter scanning device is used for scanning a printing sample page, the chromatic aberration variable of each ink area between the printing sample page and a customer confirmation sample manuscript is calculated, an AI large model is used for learning to obtain the relation between the ink fountain opening degree variable quantity of each ink area and the corresponding chromatic aberration variable, and subsequent printed matter is scanned and detected in real time. And the AI large model generates ink key adjustment data of each ink area according to the detection result, and transmits the adjustment data to the printing machine for corresponding adjustment. The printing machine can be intelligently controlled according to the detected real-time parameters through intelligent learning of the AI large model, dependence on personal experience of a machine owner is reduced, and quality stability is guaranteed.
Owner:BEIJING HONGHAO QIANRUI TECH CO LTD
Double-lifting swing arm type offset printing mechanism
The utility model relates to a double lifting swing arm type offset printing mechanism which is characterized in that a printing roller station, a first lifting swing arm and a second lifting swing arm are arranged on a rack, a first mounting part for mounting a transfer printing roller is arranged on the first lifting swing arm, a second mounting part for mounting a printing roller is arranged on the second lifting swing arm, and the printing roller station is arranged above the first mounting part; the second mounting portion is disposed below the first mounting portion. A double-lifting swing arm structure is adopted, a transfer printing roller and a printing roller can be assembled, the corresponding transfer printing roller and the printing roller are lifted and lowered in a swing lifting mode, a large operation space can be vacated for assembly after the transfer printing roller and the printing roller swing and are separated from each other along with corresponding swing arms, the space occupied by the double-lifting swing arm structure is relatively compact, and the disassembly and assembly convenience of all the rollers is improved; the assembly of transfer rollers with different sizes and diameters and the like is met, the operation is stable, the size of the closing pressure is relatively convenient to debug and is not easy to interfere with each other when the closing pressure and the separating pressure are separated, and the closing pressure is lifted upwards and is not easy to conflict during the closing pressure.
Owner:ZHEJIANG WEIGANG TECH CO LTD
High-stability digital discharge printing ink-jet ink and preparation process thereof
The invention relates to the technical field of ink, in particular to high-stability digital discharge printing ink-jet ink and a preparation process thereof. The high-stability digital discharge printing ink-jet ink is prepared from the following raw materials in parts by weight: 60-80 parts of a solvent, 10-20 parts of a discharge agent, 2-4 parts of filler, 1-3 parts of a humectant and 0.4-1 part of an active agent. According to the invention, sodium alginate is used as natural anionic polysaccharide, nano calcium carbonate in the filler can be wrapped through hydrogen bonds and electrostatic interaction by using hydroxyl and carboxyl contained in a molecular chain of sodium alginate to form composite structure microspheres, and Span 80 and paraffin can further modify the surface morphology of the microspheres by using hydrophobic interaction of Span 80 and paraffin; after the ink is dried, the composite structure microspheres can be combined with ink components, a continuous film is formed on the surface of a fabric, nano calcium carbonate and adsorbed pigment molecules are fixed, damage of external factors to pigments is isolated, the coloring life is prolonged, and therefore the stability of the digital discharge printing ink-jet ink is improved.
Owner:QINGDAO KELI DIGITAL PRINTING TECHNOLOGY CO LTD
Process for preparing polymeric security articles
There is described a method of manufacturing a security article, said method comprising the steps of: introducing into an offset printing device a transparent film comprising a non-fibrous substrate layer of regenerated cellulose; disposing an opacification layer on at least a portion of at least one surface of said film by a first offset printing step; and disposing printed information on at least a portion of said opacification layer by a second offset printing step.
Owner:KOENIG & BAUER BANKNOTE SOLUTIONS SA
Electron beam curable offset printing ink composition
The present invention addresses the problem of providing an active energy beam (preferably an electron beam) curable offset printing ink composition exhibiting a sufficient suitability for "water allowance", preferably an ink composition which is excellent in various performances as an active energy beam curable offset printing ink composition, for example, curing performance, adhesiveness to a printing target, and suitability for lamination. Provided as a solution to the problem is an electron beam curable offset printing ink composition which includes a ketone resin (A), a (meth)acrylate compound (B), and an extender pigment (C), and substantially does not include a photopolymerization initiator. The electron beam curable offset printing ink composition does not contain water or contains not more than 3 mass% of water. The ketone resin (A) is: a resin obtained by condensation between a ketone and formaldehyde; or a hydrogenated product thereof.
Owner:SAKATA INX
Offset printing lithographic plate high-saturation packaging color-reducing printing method, device, equipment and medium
The invention relates to the technical field of package printing, in particular to an offset printing lithographic plate high-saturation package color reduction printing method, device and equipment and a medium, and the method comprises the following steps: obtaining a standard Lab color value of a large-area intermediate color in a target image based on an international standardized color management system; separating an intermediate color in a target image to a user-defined spot color layer according to the standard Lab color value, and determining an overprinting proportional relation between basic CMY three colors and the intermediate color according to the user-defined spot color layer; screening optimization processing is carried out on an area corresponding to the overprinting proportional relation so as to reduce interference of basic CMY three colors on an intermediate color; and generating a standardized printing file containing the spot color layer and the basic CMY color, and finishing printing through an offset printing process. The offset printing method has the effect of solving the problems of insufficient color saturation and poor color stability in existing offset printing package printing.
Owner:GUANGZHOU QIANCAI PAPER PRINTING CO LTD
Dry powder offset printing
PendingUS20250329706A1Electrode rolling/calenderingElectrode thermal treatmentMechanical engineeringMaterials science
Systems, methods, and other embodiments associated with high speed, high precision direct deposition of patterned dry powder. In one embodiment, an example apparatus includes an intermediate substrate having an exterior surface configured to move patterned dry powder towards a target substrate, the exterior surface further configured to move and enclose a volume, a patterning device communicably coupled to the intermediate substrate and configured to form patterned dry powder on the exterior surface of the intermediate substrate, and a pressing mechanism configured to apply heat and pressure to the patterned dry powder positioned vertically above an upper surface of the target substrate to disrupt the adhesion of the patterned dry powder positioned vertically above the upper surface of the target substrate and transfer and adhere the patterned dry powder to the upper surface of the target substrate as a fused patterned layer.
Owner:KERACEL INC
Process for preparing polymeric security articles
There is described a method of manufacturing a security article, said method comprising the steps of: introducing into an offset printing device a transparent film comprising a non-fibrous substrate layer of regenerated cellulose; and disposing printed information on at least a portion of said transparent film by an offset printing step, wherein said transparent film introduced into said offset printing device further comprises an ink-receptive layer on at least one surface of said substrate layer.
Owner:KOENIG & BAUER BANKNOTE SOLUTIONS SA
Automatic stacking device of offset printing high-grade packaging box production line
The invention relates to the technical field of automatic stacking devices, and discloses an automatic stacking device of an offset printing high-grade packaging box production line, the automatic stacking device comprises a supporting plate, a motor is fixedly connected to the surface of the supporting plate, a bidirectional threaded rod is fixedly connected to the output end of the motor, and a threaded plate is in threaded connection to the surface of the bidirectional threaded rod; the end, away from the two-way threaded rod, of the threaded plate is slidably connected with the surface of a sliding rod, and the surface of the sliding rod is fixedly connected with a right-angle plate. By arranging the positioning mechanism, when a packaging box is conveyed to the position below the supporting plate through the conveying device, an electric telescopic rod is started to push the supporting plate to move downwards, the supporting plate can drive a positioning plate to move downwards at the moment, and the packaging box is effectively separated through cooperation of a push rod and a push plate; and therefore, the positioning plates are prevented from being blocked, and the packaging box can be positioned and fixed through the four positioning plates.
Owner:SHANDONG HUASHANG PRINTING TECH CO LTD
Self-adaptive control method for offset printing ink path system
InactiveCN120003157AControllers with particular characteristicsPrinting press partsControl engineeringSystem dynamics model
The invention discloses a self-adaptive control method of an offset printing ink path system, and belongs to the technical field of printing control. The method comprises the following steps: constructing a field density-ink key opening mapping relation and an optical parameter-field density mapping relation corresponding to a paper and ink combination; obtaining current offset printing processing parameters; setting an initial ink key opening according to the field density-ink key opening mapping relation, the target field density and the color ink coverage rate; constructing a system dynamic model; acquiring real-time field density according to the optical parameters acquired in real time and the optical parameter-field density mapping relation; setting control parameters of an ink path controller according to the system dynamic model, the initial ink key opening and the real-time field density; the control parameters comprise PID control parameters and real-time ink key opening. The adaptive capacity of ink path control to different materials and ink conditions is improved, changes of the environment and the conditions can be quickly responded, the machine adjusting process is simplified, and therefore the printing quality and the production efficiency are improved.
Owner:GUANGDONG YUANLONG PRINTING CO LTD
Printing ink heating device of offset press
The utility model discloses a printing ink heating device of an offset press, and particularly relates to the technical field of offset presses, the printing ink heating device comprises a printing ink barrel, the top surface of the printing ink barrel is fixed and communicated with a feeding pipe, the bottom wall of the printing ink barrel is fixed and communicated with a discharging pipe, and a bottom heating ring and a top heating ring are respectively connected in the printing ink barrel in a sliding mode. The printing ink barrel drives the bottom heating ring and the top heating ring to slide up and down through a driving mechanism, a first threaded rod is fixedly installed in the printing ink barrel, and a threaded sleeve is connected to the first threaded rod in a threaded mode. Meanwhile, the bottom sinking and caking of the ink are broken, the fluidity of the ink is kept, and the discharging pipe can be kept unblocked through reciprocating sliding of the cleaning pin and the cleaning ring in the discharging pipe, so that blockage of the discharging pipe is avoided.
Owner:HUBEI HEJIA FARM PRODUCE CO LTD
Particle surface printing process and printed matter
The invention provides a particle surface printing process and a printed matter, and the printing process comprises the following steps: selecting basic color ink, and adding an acrylate modified polysiloxane-polyethylene wax composite additive into the basic color ink to obtain modified color ink; the modified color ink is applied to the surface of the printed matter through first printing equipment; uV gloss oil is applied to the surface of the modified color ink which is not dried after printing through second printing equipment; and enabling the assistant color ink layer and the UV gloss oil to be subjected to surface energy difference driven directional aggregation reaction by utilizing a UV curing lamp, so as to form a particle surface layer with a micron-sized granular structure. Compared with an existing reverse glazing process, the reverse glazing process has the advantages that the process steps are obviously reduced, the matte visual effect and the gravel touch effect are obtained simultaneously in one-time online offset printing, the consumption of special UV gloss oil can be reduced by about 20-30%, and the overall production efficiency is improved by about 15-25%.
Owner:SHANGHAI TOBACCO GROUP CO LTD +1
Paper smoothing and cutting mechanism for cigarette case offset printing processing
The invention relates to the field of cigarette case production, in particular to a paper smoothing and cutting mechanism for cigarette case offset printing processing, which comprises a support table, a suction mechanism is mounted at the top of the support table, the suction mechanism comprises a shell, a connecting plate is movably connected to the top of the shell, and an air pump is connected to the top of the connecting plate. The air inlet end of the air extracting pump communicates with a hose, the bottom of the hose communicates with a U-shaped pipe, and the bottom of the U-shaped pipe communicates with a first pressing plate. Cigarette case paper can be adsorbed, the adsorbed paper can be transferred and fed, after die cutting of the cigarette case paper is completed, feeding operation can be automatically carried out, the paper is accurately conveyed to a printing processing area, manual paper transferring is not needed, the labor and time cost is greatly saved, the overall production efficiency is remarkably improved, and the production efficiency is improved. And large-scale and high-efficiency cigarette case printing production requirements can be better met.
Owner:SHANXI JINYE PRINTING CO LTD
A new method for measuring isopropanol concentration by means of inclination angle and application thereof
This invention belongs to the field of concentration detection technology and discloses a novel method and application for measuring isopropanol concentration based on tilt angle. The method includes: sampling and pretreatment of the mixed solution; tilt angle detection and specific gravity calculation; data fitting and concentration correlation; data transmission and cloud platform uploading; and real-time display and closed-loop monitoring. This invention is specifically adapted to the mixed solution system of dampening solution, isopropanol, and water in the water tank of offset printing presses. It is unaffected by small amounts of impurities in the solution, and the equipment is waterproof and dustproof, adapting to the industrial environment of printing workshops. Compared with traditional manual sampling or dedicated concentration meter measurement methods, this invention is simple to operate, responds quickly, has low detection costs, and can provide real-time concentration data feedback. It is suitable for online monitoring of isopropanol concentration in industrial production scenarios such as offset printing, and has strong practicality and promotional value.
Owner:QINGDAO CHENXUN SOFTWARE TECH CO LTD
Waste offset printing ink recovery treatment method and application
The invention discloses a waste offset printing ink recovery treatment method and application, and belongs to the technical field of printing ink, the recovery treatment method comprises the following steps: mixing and stirring waste offset printing ink and n-hexane through pretreatment, and removing solid-phase slag through centrifugal separation to obtain a liquid phase; concentrating the liquid phase, recovering the solvent and reserving concentrated slurry; secondly, directionally dissolving the low-molecular resin and the high-molecular resin by butyl acetate and ethylene glycol diacetate respectively through two-stage counter-current extraction and centrifugal separation to obtain a low-molecular resin solution, a high-molecular resin solution and pure pigment slurry; mixing the two resin solutions, recovering the solvent through multi-tower rectification, and refining through short-path molecular distillation to obtain regenerated resin; and finally, performing ultrasonic purification, modification and spray drying on the pigment slurry to obtain the regenerated pigment. According to the waste offset printing ink recycling treatment method and application, an efficient and reliable solution is provided for recycling of waste offset printing ink.
Owner:YUNNAN XILE TECH CO LTD
Offset printing ink containing waterborne polyurethane-acrylic resin and preparation method of offset printing ink
The invention discloses offset printing ink containing waterborne polyurethane-acrylic resin and a preparation method of the offset printing ink. The ink is prepared from the following components in parts by weight: 30-60 parts of pigment, 15-25 parts of waterborne polyurethane-acrylic resin, 2-5 parts of a dispersing agent, 1-3 parts of a flatting agent, 1-3 parts of an emulsifying agent, 1-2 parts of a drying agent and 60-180 parts of a solvent. The prepared offset printing ink contains the waterborne polyurethane-acrylic resin, the water resistance, the wear resistance and the flexibility of the ink are improved, the performance of the ink is further improved by adding the dispersing agent, the flatting agent and the emulsifying agent, the adhesive force of the ink is improved through combined use of Solsperse 20000 and diacetylene glycol, and the adhesive force of the ink is improved through combined use of BYK-333 and EFKA 3650. Due to the combined use of lecithin and Boltorn H20, the emulsifying property of the ink is improved.
Owner:JOINT SUCCESS CO LTD
Doctor
ActiveUS12420542B2Liquid surface applicatorsRotary intaglio printing pressDigital printingPrinting press
A doctor (20), in particular for printing cylinders and coating systems, includes a doctor edge (21), a doctor body (22), and a curved blade profile (25) which is formed between the doctor edge (21) and the doctor body (22). In order to produce a doctor (20) which reduces the maintenance requirements of a gravure, flexographic, offset and / or digital printing machine and increases the service life of a doctor (20), according to the invention the extension of the curved blade profile (25) from the doctor edge (21) to the doctor body (22) is square or cuboid and / or the extension of the curved blade profile (25) from the doctor edge (21) to the doctor body (22) has at least one turning point (26).
Owner:TKM MEYER GMBH
Printing machine capable of preventing offset printing
The utility model relates to the technical field of printing machines, and discloses an anti-deviation printing printing machine which comprises a base plate, two fixing frames are arranged above the base plate, two arc-shaped baffles are arranged in each fixing frame, and rotating rods are rotationally connected to the inner walls of the two fixing frames. The outer surfaces of the two rotating rods are each provided with a set of threaded grooves, each set of threaded grooves are symmetrical, and the multiple arc-shaped baffles are in threaded connection with the threaded grooves close to the arc-shaped baffles. According to the printing machine capable of preventing deviation printing, the distance between each set of arc-shaped baffles can be adjusted through cooperation of the arc-shaped baffles and the threaded grooves and rotation of the rotating rods, adjustment is more convenient and faster, and the surface of a printing piece to be printed can be cleaned through cooperation of an exhaust barrel and a nozzle; and static electricity attached to the surface of the printing piece is removed, so that the phenomenon that the surface of the printing piece adsorbs impurities due to the static electricity and the printing work of the printing piece is affected is avoided.
Owner:YUNCHANG GRP YUNCHANG SPECIAL PRINTING (SHENZHEN) CO LTD
Rubber roller fixing device of offset press
Owner:TONGLU EAST PRINTING & KNITTING CO LTD
Durable wear-resistant offset printing ink and preparation method thereof
The invention discloses durable wear-resistant offset printing ink and a preparation method thereof, and relates to the technical field of offset printing. The durable wear-resistant offset printing ink is at least prepared from the following raw materials in parts by weight: 30 to 45 parts of jatropha curcas oil-based polyurethane acrylate, 4 to 8 parts of vinyl silicon dioxide, 15 to 25 parts of epoxidized soybean oil acrylate, 10 to 18 parts of soybean methyl oleate, 12 to 18 parts of pigment, 2 to 4 parts of fusible polytetrafluoroethylene micro powder, 1.5 to 3 parts of drying agent and 3 to 5 parts of auxiliary agent. The prepared durable wear-resistant offset printing ink is low in VOCs emission, good in wear resistance, high in durability and capable of being attached to various base materials.
Owner:JIANGMEN CAIGE ENVIRONMENTAL PROTECTION TECH IND
Method for detecting undesired ink application on substrate sheet in offset printing press
The invention relates to a method for detecting an undesired ink application (set-off) on a substrate sheet in an offset printing press, wherein a measurement image and a reference image are captured by means of at least one camera and a computer-assisted comparison is carried out. The image is acquired in a region of the substrate sheet that is not in contact with the ink.
Owner:HEIDELBERGER DRUCKMASCHINEN AG
External ink storage device of four-color offset press
ActiveCN223918958UStationary filtering element filtersPrinting press partsCentrifugal forceOffset printing
The utility model discloses an external ink storage device of a four-color offset press, relates to the technical field of four-color offset presses, and solves the problems that after an existing external ink storage device stores ink, if the external ink storage device is not used for a period of time, the ink in the external ink storage device is precipitated, and the existing external ink storage device generally uses the ink directly, so that the ink storage efficiency is low. The utility model relates to an ink jet device which solves the problems that an existing ink jet device does not have a filtering function and impurities in ink are prone to blocking an ink jet pipe after being used for a long time and comprises a main body, and a control panel is arranged on the front face of the main body. The stirring shaft and a motor drive the stirring shaft to rotate, centrifugal force is generated due to rotation of the stirring shaft, and then a movable seat is driven to rotate; the movable seat drives the movable rod to be thrown up in the rotating process, at the moment, the movable rod drives the beating plate to beat and stir the ink, the ink passes through the interior of the through hole in the high-speed rotating process of the stirring shaft, and the through hole is arranged to be wide outside and narrow inside so that the ink can be fully stirred.
Owner:GUANGDONG HOUDE HUAYING TECHNOLOGY CO LTD
Dual-purpose high-adhesion composite offset printing ink and preparation method thereof
The invention relates to dual-purpose high-adhesion composite offset printing ink and a preparation method thereof, and belongs to the technical field of offset printing. The invention provides a preparation method of dual-purpose high-adhesion composite offset printing ink, which comprises the following steps of: melting rosin, mixing with maleic anhydride and phthalic anhydride, cooling, adding pentaerythritol and glycerol, continuously mixing, cooling to obtain rosin modified resin, adding acrylate copolymer and epoxidized soybean oil, mixing, and uniformly mixing to obtain the dual-purpose high-adhesion composite offset printing ink. The preparation method comprises the following steps: adding KH-570 into a reaction kettle, adding a double-modified pigment, manganese isooctanoate and a dispersant, continuously mixing and grinding to obtain a premix, mixing with KH-570, adding a photoinitiator and an antioxidant, continuously mixing, and filtering to obtain the product. According to the invention, the cooperation of UV curing and oxidation curing is realized by adjusting the formula, and meanwhile, the dual-modification pigment, the acrylate copolymer and the like are introduced to realize the interface bonding between the ink and a curing layer and between the ink and a UV curing layer or an oxidation curing layer, so that layering is avoided, and the high adhesion of the ink is promoted.
Owner:茂名阪田油墨有限公司
Rubber roller on-line cleaning device
The utility model relates to the technical field of cleaning devices for offset printing rollers, in particular to a rubber roller online cleaning device which comprises a cleaning module, a longitudinal adjusting module and a horizontal adjusting module, the cleaning module comprises a cleaning seat and a cleaning piece arranged on the cleaning seat, and the cleaning piece abuts against the outer surface of a rubber roller through the longitudinal adjusting module. The cleaning piece abutting against the outer surface of the rubber roller moves in the length direction of the rubber roller through the horizontal adjusting module, the horizontal adjusting module comprises a transverse strip and side supports arranged at the two ends of the transverse strip, the cleaning base is arranged on the transverse strip in a sliding mode, the transverse strip is connected with the longitudinal adjusting module through the side supports, and the longitudinal adjusting module comprises two vertical supports and a linkage assembly. The side supports longitudinally move along the two vertical supports through the linkage assemblies. According to the online cleaning device for the rubber covered roller, under the cooperation of the longitudinal adjusting module and the horizontal adjusting module, the rubber covered roller can be cleaned while the rubber covered roller runs, online cleaning of the rubber covered roller is achieved, and the cleaning efficiency of the rubber covered roller is improved.
Owner:JIANGSU YUXING FILM TECH
Double-swing-arm type offset printing device
The invention relates to a double-swing-arm type offset printing device which is characterized in that a plate roller shaft is provided with a detachable and replaceable plate roller cylinder, a first swing arm is provided with a transfer printing roller shaft, the transfer printing roller shaft is provided with a detachable and replaceable transfer printing roller cylinder, a second swing arm is provided with a bottom roller, and the center distance between the transfer printing roller shaft and a first swing supporting shaft of the first swing arm is a first distance R1; the center distance between the bottom roller and a second swing supporting shaft of the second swing arm is a second distance R2, a circular arc corresponding to R1 and a circular arc corresponding to R2 are determined through the plate rollers with the large outer diameter specification, the middle outer diameter specification and the small outer diameter specification, and the overall structure can be reasonably arranged through the double-swing-arm type structure and the setting of the corresponding swing supporting axis position. After the printing roller and the transfer printing roller with different diameter specifications are replaced by the device, the center of the transfer printing roller and the center of the bottom roller can be ensured to be always close to a vertical straight line, and the deviation is extremely small.
Owner:ZHEJIANG WEIGANG TECH CO LTD
Offset printing ink binder and preparation method thereof
The invention discloses an offset printing ink binder and a preparation method thereof, and belongs to the technical field of printing ink preparation, the offset printing ink binder comprises the following components by weight: 100 parts of phenolic resin slurry, 70-100 parts of modified abietic acid resin, 50-100 parts of vegetable oil, 10-50 parts of mineral oil, and 1-5 parts of a gel; the modified abietic acid resin comprises resin A and resin B, wherein the resin A is a polyhydric alcohol esterification modified product obtained by sequentially carrying out acylating chlorination and esterification reaction on maleopimaric acid serving as a raw material; the resin B is prepared by the following steps: performing an aminomethylation reaction on acetophenone, formaldehyde and amino polyol to prepare aryl modified polyol, and esterifying the aryl modified polyol with abietic acid to prepare an esterification modified product; the offset printing ink binder disclosed by the invention is based on the modified abietic acid condensed phenolic resin, and meanwhile, the drying speed and the adhesive force of printing ink are improved.
Owner:GUANGDONG RUNHENG TECHNOLOGY CO LTD
Method for optimizing the inking of printed sheets in offset printing
ActiveEP4624160B1Rotary letterpress machinesPrinting press partsStructural engineeringIndustrial engineering
The invention relates to a method for optimising the colouring of printing material sheets in an offset printing unit of a sheet-fed printing press, in which the colouring is continuously monitored by determining the colouring values using a colour measuring device and the printing supply is controlled and, if necessary, adjusted on the basis of an evaluation of the colouring values by a computer.
Owner:HEIDELBERGER DRUCKMASCHINEN AG
Detachable and replaceable wrapping structure of offset printing roller
The utility model relates to the technical field of offset printing roller processing, and discloses an offset printing roller detachable wrapping structure which comprises a shaft core, a positioning mechanism is integrally arranged on the surface of the shaft core, a sleeve shell is arranged on the positioning mechanism in a sleeved mode, an aluminum wrapping layer is wrapped on the surface of the sleeve shell, a pressing pad is arranged at the joint of the aluminum wrapping layer in a press fit mode, and the pressing pad is arranged on the surface of the shaft core. A ceramic layer is sprayed on the surface of the aluminum wrapping layer, a seam fixing groove is formed in the sleeve shell, the pressing pad is located in the seam fixing groove, and an assembling mechanism is in lap joint with one end of the positioning mechanism and arranged on the shaft core in a sleeving mode. The offset printing roller replacement type wrapping structure solves the problems that in the prior art, in the transfer printing and gluing process of an offset printing roller, the offset printing roller needs to make full contact with glue liquid and press the glue liquid on a machined material, the surface of the offset printing roller is abraded and peeled off inevitably after long-time use, and consequently the whole offset printing roller needs to be replaced; and the processing cost of the release film is further increased.
Owner:KUNSHAN FOCUS LASER ROLLER CO LTD