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Carton printing conditions
post time: 2013-5-7 | hits: 913 |
Form printing conditions:
A: correct operation, operation concept, set the operation standard, thinking operation improvement
(1) the correct operation idea: all ideas cannot do without a "light" version and pressure, light, double roller cutter for light, squeegee pressure light, printing pressure, pressure light, light paper cutter, cutting pressure angle pressure light.
(2) for operating standards: the condition record all operations down plate pressure standard, double roller cutter for standard, squeegee pressure standard, printing pressure standard, paper roller gap, gap standard standard transmission wheel, pressure, pH value standard standard ink, ink viscosity standard.
(3) thinking operation improvement: set by the work standard, and find room for improvement from the set standards, the improvement of space is a winning advantage, if there is no standard there is no reference to improve.
Two, printing machine: printing precision, accuracy and stability of transfer ink (maintenance, calibration)
(1) the printing accuracy: precision on paper, printing position (heaven and earth direction, about the direction of cardboard hardness).
Registration accuracy, each element color seat position and direction, about the direction of color (1 color, 2 color, 2 color, 3 color, 3 color, 4 color printing color position).
The grooving accuracy, the box cover position (rake), high position box (tool), isobar accuracy.
The precision die-cutting, die-cutting position (heaven and earth, about the direction of direction), the internal dimension precision.
Before and after the fitting precision alignment, joint, joint space, with joint clearance.
(2) transfer ink accuracy: precision ceramic wheel, ceramic, ceramic rotary ink wheel rotation accuracy ability, ceramic roller and ink wiping system parallelism, ceramic roller and printing plate roller parallelism and clearance, ceramic plate wheel wheel and linear velocity, Tao Cilun lines and ink containing amount.
Printing pressure, printing plate wheel rotation accuracy, precision stamping wheel rotation accuracy, linear velocity and a printing plate roller printing pressure parallelism and clearance, printing roller and a printing plate wheel.
(3) stability: above about accuracy, is in the upper and lower limits of free or is maintained in the center position is different; the machine continued again any time can have a stable production, need regular maintenance, calibration.
Regular maintenance: regular lubrication and regular check replacement parts.
Calibration: periodic inspection of the roll gap, the roller parallelism, belt and chain tension, and check and display data.
Three, plate making: pre press design, prepress, platemaking, paste version
Prepress design: carton design should pay attention to the printed on the degree of difficulty.
Printing: printing machine, according to ability, according to the characteristics of difficult printing special treatment in the production of film, reduce the degree of difficulty to the machine.
Plate: in accordance with the film pattern of demand for positive exposure and back exposure time control; washing version should pay attention to changes in chemical purity and temperature; control set and temperature drying time; to glue treatment and post exposure treatment. In addition to the selection of production process of plate hardness is very important
Paste version of the feed direction: Zero typesetting, paste version of strip must be accurate, line wants fine, line must be accurate, marking a forme position locking.
Four, the ink: ink acid (pH) values of control and ink viscosity
Ink acid (pH) value control: according to different kinds of cardboard, various lines of the ink containing different amount of ceramic roller, different ink wiping system, various plate, color printing, acid (pH) value of the control is very important.
Control the ink viscosity: Ink viscosity control ink thickness, according to the control and acid-base different cardboard, various lines of the ink containing different amount of ceramic roller, different ink wiping system, various plate, color printing, ink viscosity (pH) values correspond to each other, the viscosity does not represent the pH value (pH), acid (pH) value does not represent the viscosity.
Ink color concentration control: color concentration is ink layer density, according to different kinds of paper, various lines of the ink containing different amount of ceramic roller, different ink wiping system, various plate, color printing, will affect the color density.
Five, cardboard: smoothness, temperature, humidity, surface acid-base value, ink and paper surface tension
Smoothness: printing color accuracy, printing pressure control, take the paper smoothness.
Temperature: will affect the ink drying rate, the printed version of the service life.
Humidity: will affect the ink transfer, too wet paper feeding wheel can be damaging to the hardness of the paper, printing pressure increase on the cartons compressive capacity reduction; too dry can cause ink leveling.
Paper: paper pH pH changes will influence the control ink pH value.
Ink: ink absorption intensity affect the ink transfer, coated paper ink absorption is the worst.
The paper surface tension: surface tension plate and ink on paper will be affected by the surface tension.
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