CN112848720A - Novel full-automatic pre-overprinting method of gravure printing machine - Google Patents
Novel full-automatic pre-overprinting method of gravure printing machine Download PDFInfo
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- CN112848720A CN112848720A CN202011639782.5A CN202011639782A CN112848720A CN 112848720 A CN112848720 A CN 112848720A CN 202011639782 A CN202011639782 A CN 202011639782A CN 112848720 A CN112848720 A CN 112848720A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/10—Intaglio printing ; Gravure printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0036—Devices for scanning or checking the printed matter for quality control
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Abstract
The invention discloses a novel full-automatic pre-overprinting method of an intaglio press, wherein a guide mark type is specially manufactured on all printing rollers according to size engraving; adjusting the transverse and color register electric eye positions of each color group, and pressing an automatic mark locking button; pressing the color set pressing roller from back to front, identifying the guide mark printed by the current color set through the color register electric eye on the color set and memorizing the color mark phase of the color set, and repeating the steps for all the color sets until the first color set finishes the identification of the guide mark and the memory of the mark type; and correcting the longitudinal error, and finishing the pre-overprinting process. After the printing machine starts to work, the pre-overprinting work has high automation degree, quick error correction response and high pre-overprinting precision. The full-automatic pre-chromatography operation is realized, and the pre-chromatography waste products are greatly reduced.
Description
Technical Field
The invention belongs to the technical field of printing mechanical equipment, and relates to a novel full-automatic pre-overprinting method of an intaglio printing machine.
Background
For traditional electronic shaft printing machines, automatic overprinting can be realized in the printing process of the conventional electronic shaft control system, but in the early stage of printing, pre-overprinting is a very important process, and after pre-overprinting is carried out, overprinting in the later stage can be more accurate.
Disclosure of Invention
The invention aims to provide a novel full-automatic pre-overprinting method of an intaglio printing machine, which solves the problems of large rejection rate, time and labor waste caused by manual operation of pre-overprinting in the early printing process in the prior art.
The technical scheme adopted by the invention is that the novel full-automatic pre-overprinting method of the gravure press specifically comprises the following steps:
step 4, pressing the automatic locking mark button;
step 5, pressing the color set press roller from back to front, identifying a guide mark printed by the current color set through a color register electric eye on the color set and memorizing the color code phase of the color set, finishing the pressing and printing of the back and front color set press rollers, and beginning to identify the guide mark and memorizing the color code phase; during the identification, color register electric eye adjustment processing is carried out on the condition that no color code is detected or the press roller is not pressed until the color registers of the respective color groups are detected by the color register electric eye; repeating the steps for all color groups until the first color group completes the identification of the guide mark and the memory of the mark type;
step 6, separating and pressing by a second color group press roller, starting pre-register operation, identifying the guide marks of the first color group by the color register electric eyes of the second color group after one color space material length, automatically pressing by the second color group press roller, identifying the guide marks of the two color groups by the color register electric eyes, and calculating the error between corresponding overprint marks by the system; the second color press roller automatically separates from pressing, the plate roller performs phase adjustment, the plate roller automatically closes and presses after the adjustment is completed,
and 7, correcting the longitudinal error on the basis of the step 6, and finishing the pre-overprinting process.
The specific process of the step 5 is as follows:
step 5.1, the color group press rollers press the last color in a forward and reverse sequence, guide mark types and color marks of the color groups are detected through the color registration electric eyes on the color groups, each color group in the color registration system corresponds to an operation screen, and when the color mark loss is displayed on the operation screen corresponding to the color group i, the mark shape of the color group i is not detected (the mark shape on the color group i is detected through the color registration electric eyes on the color group i, and the color group i is the ith color group);
step 5.2, when the mark shape of the color set i is not detected, the position of the color register electric eye is adjusted left and right until the photoelectric eye on the color set i detects the mark shape of the color set i again;
step 5.3, when color code loss is displayed on the color registering system operation screen corresponding to the color set i, indicating that the shape of the color set i is not detected; returning to execute the step 5.2; otherwise, when the color code missing word does not appear on the color register system operation screen, the mark shape of the color group i is detected, and the next step is continuously executed; i is an integer of 1 to N, N is the number of color sets in the color process system (if there are 9 color sets in the color process system, N is equal to 9);
the specific process of the step 6 is as follows:
step 6.1, except for the first color set, pre-register operation is started when the current color set press roller is separated, after a color space material length is passed, when the color register electric eye identifies a guide mark of the first color, the current color set press roller is combined with an impression brush, when the longitudinal error range of the current color set and the previous color set mark shape read by the color register electric eye is not within-3 mm, the current color set press roller is separated, the phase of a printing roller is readjusted according to the error, and the press roller is combined after the adjustment is finished;
and 6.2, detecting the longitudinal error of the standard shapes of the current color set and the previous color set again by the chromatic electric eye of the current color set, returning to execute the step 6.1 if detecting that the longitudinal error range of the standard shapes of the current color set and the previous color set is not within-3 mm to 3mm, and continuing to execute the next step if detecting that the longitudinal error range of the standard shapes of the current color set and the previous color set is within-3 mm to 3 mm.
In the step 6, the color set standard type error is required to be within a locking standard range of +/-3 mm; and adjusting and processing the condition that the longitudinal error range is not between-3 mm and 3mm until the read longitudinal error range is between-3 mm and 3 mm.
The range of the longitudinal error in the step 7 is-2 mm.
The invention has the beneficial effects that:
the method provided by the invention is realized based on a universal electronic shaft gravure printing machine, the special manufacturing guide marks are engraved on all the color set printing rollers, the color set pressing rollers are combined with the printing brushes from back to front, and the current color set mark type phase position is accurately identified and memorized; then, the plate is subjected to front-to-back pressure relief and pre-registration, the phase difference is identified through combined pressure, and the system can quickly correct the color set with errors; after the printing machine starts to work, the pre-overprinting work has high automation degree, quick error correction response and high pre-overprinting precision. The full-automatic pre-chromatography operation is realized, and the pre-chromatography waste products are greatly reduced.
Drawings
FIG. 1 is a full-automatic pre-overprinting flow chart of the full-automatic pre-overprinting method of the novel gravure printing machine;
FIG. 2 is a diagram of the guide standard size of a full-automatic overprinting roller of the full-automatic pre-overprinting method of the novel gravure printing machine;
FIG. 3 is a linkage feeding of the novel full-automatic pre-overprinting method of the gravure printing machine, and the whole machine is in a white film state diagram;
FIG. 4 is a diagram of the novel full-automatic pre-overprinting method of the gravure printing machine for identifying and memorizing the phase state of the printing plate;
FIG. 5 is a diagram of a 2 nd color combination pressure identification phase state of the novel full-automatic pre-overprinting method of the gravure printing machine;
FIG. 6 is a diagram of a 2 nd color separation pre-register state of the novel full-automatic pre-overprinting method of the gravure printing machine;
FIG. 7 is a state diagram of the second color relief adjustment phase position of the novel full-automatic pre-trapping method of the gravure printing machine of the present invention;
fig. 8 is a diagram of the state of adjustment completion of all color groups of the full-automatic pre-overprinting method of the novel intaglio printing press.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a novel full-automatic pre-overprinting method of an intaglio printing machine, which specifically comprises the following steps as shown in figure 1:
step 4, pressing the automatic locking mark button;
step 5, pressing the color set press roller from back to front, identifying a guide mark printed by the current color set through a color register electric eye on the color set and memorizing the color code phase of the color set, finishing the pressing and printing of the back and front color set press rollers, and beginning to identify the guide mark and memorizing the color code phase; during the identification, color register electric eye adjustment and processing are carried out on the condition that no color code is detected or the press roller is not pressed until the color registers of the respective color groups are detected by the color register electric eye; repeating the steps for all color groups until the first color group completes the identification of the guide mark and the memory of the mark type;
the specific process is as follows:
step 5.1, the color group press rollers press the last color in a forward and reverse sequence, guide mark types and color marks of the color groups are detected through the color registration electric eyes on the color groups, each color group in the color registration system corresponds to an operation screen, and when the color mark loss is displayed on the operation screen corresponding to the color group i, the mark shape of the color group i is not detected (the mark shape on the color group i is detected through the color registration electric eyes on the color group i, and the color group i is the ith color group);
step 5.2, when the mark shape of the color set i is not detected, the position of the color register electric eye is adjusted left and right until the photoelectric eye on the color set i detects the mark shape of the color set i again;
step 5.3, when color code loss is displayed on the color registering system operation screen corresponding to the color set i, indicating that the shape of the color set i is not detected; returning to execute the step 5.2; otherwise, when the color code missing word does not appear on the color register system operation screen, the mark shape of the color group i is detected, and the next step is continuously executed; i is an integer of 1 to N, N is the number of color sets in the color process system (if there are 9 color sets in the color process system, N is equal to 9);
step 6, separating and pressing by a second color group press roller, starting pre-register operation, identifying the guide marks of the first color group by the color register electric eyes of the second color group after one color space material length, automatically pressing by the second color group press roller, identifying the guide marks of the two color groups by the color register electric eyes, and calculating the error between corresponding overprint marks by the system; the second color compression roller automatically separates from pressing, the printing roller performs phase adjustment, and the printing roller automatically closes and presses after the adjustment is completed, wherein the color set standard type error is required to be within a locking standard range of +/-3 mm; meanwhile, the longitudinal error range is not between-3 mm and 3mm, and the adjustment and the processing are carried out until the read longitudinal error range is between-3 mm and 3 mm;
the specific process is as follows:
step 6.1, except for the first color set, pre-register operation is started when the current color set press roller is separated, after a color space material length is passed, when the color register electric eye identifies a guide mark of the first color, the current color set press roller is combined with an impression brush, when the longitudinal error range of the current color set and the previous color set mark shape read by the color register electric eye is not within-3 mm, the current color set press roller is separated, the phase of a printing roller is readjusted according to the error, and the press roller is combined after the adjustment is finished;
and 6.2, detecting the longitudinal error of the standard shapes of the current color set and the previous color set again by the chromatic electric eye of the current color set, returning to execute the step 6.1 if detecting that the longitudinal error range of the standard shapes of the current color set and the previous color set is not within-3 mm to 3mm, and continuing to execute the next step if detecting that the longitudinal error range of the standard shapes of the current color set and the previous color set is within-3 mm to 3 mm.
And 7, correcting the longitudinal error within the range of-3 mm to 3mm obtained in the step 6 (the printing color registering system can correct the standard error, so the correction method belongs to the prior art), ensuring that the longitudinal error range is-2 mm to 2mm, and finishing the pre-registering process.
Examples
Taking the fully automatic pre-registration method of a five-color (five color sets in total) printing machine as an example, the pre-registration process is shown in fig. 3-8.
Starting up operation, tension input, ink distribution and the like. After the printing material is smooth in feeding, uniform in ink amount and stable in tension, the printer is linked, and the automatic mark locking button is pressed;
and the printing press rollers start to automatically press the fifth color, because each color group is provided with the color register electric eye which can identify and memorize the phase of the guide mark and the color mark printed by the current color group, when the fifth color is identified, the fourth color press roller automatically presses, and the subsequent color groups repeat the steps until the first color press roller presses the first color and identifies and memorizes the mark type and the phase of the color group. In the process, if the color register electric eye does not detect the color scale of the current color group, the position of the color register electric eye is transversely adjusted, and the automatic pressing and printing of the back and front color press rollers are finished.
After the first color set color register electric eye identifies and memorizes the guide mark and the mark type of the current color set, the second color press roller is automatically pressed, the second color plate roller starts to accurately perform pre-register operation, and after one color space material length, when the second color register electric eye detects the guide mark and the mark type of the first color set, the second color press roller automatically presses, and at the moment, the register electric eye of the second color set can identify the color mark information of the current color set and the first color set, so that the phase difference between the current color set and the first color set is obtained. When the color register electric eye of the second color group reads that the longitudinal error between the color scale of the current color group and the color scale of the first color group is 6mm, and the value is not in the range of minus 3mm to 3mm, the compression roller of the second color group automatically separates from the pressing, the phase is readjusted, the compression roller automatically presses and presses the current color scale after the adjustment is finished, and the error between the color scale of the second color group and the color scale of the first color group is judged again until the error is between minus 3mm to 3 mm; the third color group compression roller is automatically released from pressing, accurate pre-register operation is started, after a color space material length, the third color compression roller is automatically pressed after the third color chromatography electric eye detects the guide mark and the mark type of the first color group, the chromatography electric eye of the third color group can identify the color mark information of the current color group and the first color group to obtain the phase difference between the current color group and the first color group, the longitudinal error of the color group mark shape is adjusted to be 2.5mm, and the color group mark shape is in a pre-registration range of-3 mm to 3 mm; repeating the above steps for the subsequent fourth color and the fifth color until the pre-overprinting precision of all color groups is-3 mm
Within the range of about 3mm of pre-overprinting, the automatic pre-overprinting step is completed at this time, and the system is automatically raised to the set printing speed. The measured waste loss in the actual pre-overprinting process is one machine body material length (50 meters) +20 meters, so that the waste loss is greatly reduced.
Claims (5)
1. A novel full-automatic pre-overprinting method of an intaglio printing machine is characterized by comprising the following steps:
step 1, engraving special guide mark types on all printing plate rollers according to sizes;
step 2, adjusting the transverse direction and the position of the chromatic electric eye of each color group, and keeping the chromatic electric eye to be opposite to the color group;
step 3, starting the printer after the printing material is smooth in feeding, uniform in ink amount and stable in tension;
step 4, pressing the automatic locking mark button;
step 5, pressing the color set press roller from back to front, identifying a guide mark printed by the current color set through a color register electric eye on the color set and memorizing the color code phase of the color set, finishing the pressing and printing of the back and front color set press rollers, and beginning to identify the guide mark and memorizing the color code phase; during the identification, color register electric eye adjustment processing is carried out on the condition that no color code is detected or the press roller is not pressed until the color registers of the respective color groups are detected by the color register electric eye; repeating the steps for all color groups until the first color group completes the identification of the guide mark and the memory of the mark type;
step 6, separating and pressing by a second color group press roller, starting pre-register operation, identifying the guide marks of the first color group by the color register electric eyes of the second color group after one color space material length, automatically pressing by the second color group press roller, identifying the guide marks of the two color groups by the color register electric eyes, and calculating the error between corresponding overprint marks by the system; the second color press roller automatically separates from pressing, the plate roller performs phase adjustment, the plate roller automatically closes and presses after the adjustment is completed,
and 7, correcting the longitudinal error on the basis of the step 6, and finishing the pre-overprinting process.
2. The novel fully-automatic pre-overprinting method for the intaglio printing press according to claim 1, wherein the specific process of the step 5 is as follows:
step 5.1, pressing the color set pressing rollers forward and backward in reverse order from the last color, detecting the guide mark types and the color marks of the color sets through the color registration electric eyes on the color sets, wherein each color set corresponds to one operation screen in the color registration system, and when the color mark loss is displayed on the operation screen corresponding to the color set i, the color mark type of the color set i is not detected;
step 5.2, when the mark shape of the color set i is not detected, the position of the color register electric eye is adjusted left and right until the photoelectric eye on the color set i detects the mark shape of the color set i again;
step 5.3, when color code loss is displayed on the color registering system operation screen corresponding to the color set i, indicating that the shape of the color set i is not detected; returning to execute the step 5.2; otherwise, when the color code missing word does not appear on the color register system operation screen, the mark shape of the color group i is detected, and the next step is continuously executed; i is an integer of 1 to N, and N is the number of color groups in the chromatography system.
3. The novel full-automatic pre-overprinting method of the intaglio printing press according to claim 1, wherein the specific process of the step 6 is as follows:
step 6.1, except for the first color set, pre-register operation is started when the current color set press roller is separated, after a color space material length is passed, when the color register electric eye identifies a guide mark of the first color, the current color set press roller is combined with an impression brush, when the longitudinal error range of the current color set and the previous color set mark shape read by the color register electric eye is not within-3 mm, the current color set press roller is separated, the phase of a printing roller is readjusted according to the error, and the press roller is combined after the adjustment is finished;
and 6.2, detecting the longitudinal error of the standard shapes of the current color set and the previous color set again by the chromatic electric eye of the current color set, returning to execute the step 6.1 if detecting that the longitudinal error range of the standard shapes of the current color set and the previous color set is not within-3 mm to 3mm, and continuing to execute the next step if detecting that the longitudinal error range of the standard shapes of the current color set and the previous color set is within-3 mm to 3 mm.
4. The fully automatic pre-overprinting method for the novel intaglio printing press according to claim 1, wherein the color set calibration type error in the step 6 should be within a locking range of ± 3 mm; and adjusting and processing the condition that the longitudinal error range is not between-3 mm and 3mm until the read longitudinal error range is between-3 mm and 3 mm.
5. The fully automatic pre-overprinting method of the novel intaglio printing press according to claim 1, wherein the longitudinal error in step 7 is in the range of-2 mm to 2 mm.
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