JP2009012243A - Method for preparing printer and method for providing ink - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for preparing a printer whereby the temperature of the ink on the inking roller can be rapidly reached close to the temperature of the ink in an equilibrium condition during printing. <P>SOLUTION: The method for preparing a printer includes: a warming-up process (step S11) whereby the ink roller rotates at a low speed with the ink provision to the inking roller by the ink transfer roller suspended; an ink key preheat process (step S12) whereby the ink key opening degree is changed more than once with the rotation of the ink fountain roller suspended; a first inking process (step S13) whereby ink is provided by the ink transfer roller to the inking roller with the inking roller rotating; and an ink temperature presetting process (step S14 to S18) whereby the inking roller rotates at a higher speed than in the warming-up process with the ink provision by the ink transfer roller to the inking roller suspended. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a printing preparation method and an ink supply method for a printing press that supplies ink in an ink fountain provided with an ink key and an ink base roller to a printing plate via an ink transfer roller and a plurality of ink rollers.

  Since the temperature of the ink on the ink roller at the beginning of printing at the beginning of the day is generally lower than the temperature of the ink when it is in equilibrium by continuing to perform printing, In the initial stage, the ink density is low, and about 1000 sheets of paper are often required. Such a phenomenon is a phenomenon that occurs not only when printing is started at the beginning of the day but also when the next pattern is printed after a certain period of time after the first pattern is printed.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and a printing preparation method for a printing press and an ink capable of quickly bringing the temperature of the ink on the ink roller close to the temperature of the equilibrium ink during printing. An object is to provide a supply method.

  The invention according to claim 1 is a printing preparation method for a printing press that supplies ink in an ink fountain including an ink key and an ink base roller to a printing plate via an ink transfer roller and a plurality of ink rollers. When the ink supply to the ink roller by the ink transfer roller is stopped, the warming-up operation process in which the ink roller is rotated at a low speed, and the ink roller is supplied to the ink roller while the ink roller is rotated. A first inking process, and an ink temperature preset process in which the ink roller is rotated at a higher speed than the warm-up operation process while the ink supply to the ink roller by the ink transfer roller is stopped. .

  According to a second aspect of the present invention, in the first aspect of the invention, the adjustment step of adjusting the opening of the ink key to an opening corresponding to the pattern to be printed next, and the state where the ink roller is rotated And an ink supply step for supplying ink to the ink transfer roller.

  The invention according to claim 3 is the invention according to claim 2, wherein the temperature of the ink on the ink roller is measured in the ink temperature preset step, and the temperature of the ink reaches a preset temperature. Then, the ink temperature preset process is terminated.

  According to a fourth aspect of the invention, in the third aspect of the invention, the ambient temperature in the vicinity of the printing press is measured in the ink temperature preset step, and the set temperature is determined based on the ambient temperature.

  According to a fifth aspect of the present invention, in the second aspect of the invention, the ink temperature preset step is executed for a preset time.

  According to a sixth aspect of the invention, in the fifth aspect of the invention, the ambient temperature in the vicinity of the printing press is measured in the ink temperature preset step, and the set time is determined based on the ambient temperature.

  According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, the opening degree of the ink key is changed a plurality of times in the warm-up operation step.

  According to an eighth aspect of the present invention, in the invention according to any one of the first to sixth aspects, the rotation of the ink source roller is stopped between the warm-up operation step and the first inking step. An ink key preheating step of changing the opening of the ink key a plurality of times in the state is provided.

  According to the ninth aspect of the present invention, when printing is resumed after a lapse of a certain time after printing, the ink in the ink fountain provided with the ink key and the ink source roller is transferred to the ink passing roller and the plurality of ink rollers. Ink supply method of a printing press that supplies to a printing plate via the ink temperature presetting process in which the ink roller is rotated while the ink supply to the ink roller by the ink transfer roller is stopped, and the ink key opening degree And an ink supply step for supplying ink to the ink roller by the ink transfer roller while the ink roller is rotated. And

  The invention according to claim 10 is the invention according to claim 9, wherein the temperature of the ink on the ink roller is measured in the ink temperature preset step, and the temperature of the ink reaches a preset temperature. Then, the ink temperature preset process is terminated.

  According to an eleventh aspect of the present invention, in the invention according to the tenth aspect, the ambient temperature in the vicinity of the printing press is measured in the ink temperature preset step, and the set temperature is determined based on the ambient temperature.

  According to a twelfth aspect of the invention, in the invention of the ninth aspect, the ink temperature preset step is executed for a preset time.

  According to a thirteenth aspect of the present invention, in the invention according to the twelfth aspect, the ambient temperature in the vicinity of the printing press is measured in the ink temperature preset step, and the set time is determined based on the ambient temperature.

  According to the first and second aspects of the invention, at the start of printing, the temperature of the ink on the ink roller can be quickly brought close to the temperature of the ink in the equilibrium state during printing.

  According to the third aspect of the present invention, the ink temperature preset process can be terminated when the temperature of the ink on the ink roller reaches the set temperature.

  According to the fourth aspect of the present invention, the set temperature can be approximated to the temperature of the ink in an equilibrium state during printing, depending on the installation situation of the printing press.

  According to the fifth aspect of the present invention, the ink temperature preset process can be completed without using the temperature sensor.

  According to the sixth aspect of the present invention, the ink temperature preset process can be completed at a more accurate time according to the installation situation of the printing press.

  According to the seventh and eighth aspects of the invention, the temperature of the ink on the ink roller can be quickly brought closer to the temperature of the ink in the equilibrium state during printing.

  According to the ninth aspect of the present invention, when printing is resumed, the temperature of the ink on the ink roller can be quickly brought close to the temperature of the ink in the equilibrium state during printing.

  According to the tenth aspect of the present invention, the ink temperature preset process can be completed when the temperature of the ink on the ink roller reaches the set temperature.

  According to the eleventh aspect of the present invention, the set temperature can be approximated to the temperature of the ink in an equilibrium state during printing in accordance with the installation state of the printing press.

  According to the twelfth aspect of the present invention, the ink temperature preset process can be completed without using a temperature sensor.

  According to the invention of the thirteenth aspect, the ink temperature preset process can be completed at a more accurate time according to the installation situation of the printing press.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the configuration of a printing machine to which the present invention is applied will be described. FIG. 1 is a schematic view of a printing machine to which the present invention is applied.

  The printing machine records an image on a printing plate on which images held on the first and second plate cylinders 11 and 12 are not recorded, and then makes the ink supplied to the printing plate first, Printing on four colors is performed by transferring to the printing paper held by the first and second impression cylinders 15 and 16 via the second blanket cylinders 13 and 14.

  The printing press includes a first plate cylinder 11, a second plate cylinder 12, a first blanket cylinder 13 provided in contact with the first plate cylinder 11, and a second plate cylinder 12. A second blanket cylinder 14 provided so as to be able to contact, a first pressure cylinder 15 provided so as to be able to contact the first blanket cylinder 13, and a contact with the second blanket cylinder 14 The second impression cylinder 16 provided in a possible manner, the feed cylinder 17 for passing the printing paper supplied from the paper feeding unit 31 to the first impression cylinder 15, and the print received from the first impression cylinder 15. A transfer cylinder 18 for passing the sheet to the second impression cylinder 16 and a chain 23 for discharging the printing sheet received from the second impression cylinder 16 to the sheet discharge unit 32 are wound around the sprocket 22. A paper discharge cylinder 19 and an image pickup unit 60 for picking up an image printed on the printing paper are provided.

  The first plate cylinder 11 and the second plate cylinder 12 are so-called double cylinders that hold printing plates for two different colors on the outer periphery thereof. The first blanket cylinder 13 and the second blanket cylinder 14 have the same diameter as the first plate cylinder 11 and the second plate cylinder 12, and each has a blanket surface on which images of two colors can be transferred. .

  A first impression cylinder 15 and a second impression cylinder 16 provided so as to be able to contact the first blanket cylinder 13 and the second blanket cylinder 14, respectively, 1. It has a diameter that is ½ of the diameter of the second blanket cylinder 13, 14. The first and second impression cylinders 15 and 16 have grippers (not shown) for holding and conveying the leading edge of the printing paper.

  A sheet feeding cylinder 17 disposed adjacent to the impression cylinder 15 has the same diameter as the first and second impression cylinders 15 and 16. The sheet feeding cylinder 17 holds and conveys the leading end portion of the printing paper supplied one by one from the sheet feeding unit 31 with a gripper (not shown) for each rotation of the sheet feeding cylinder 17. The leading end of the printing paper held by the gripper is held by the gripper of the first pressure drum 15 when the printing paper is transferred from the paper feeding drum 17 to the first pressure drum 15.

  A transfer cylinder 18 disposed between the first impression cylinder 15 and the second impression cylinder 16 includes first and second plate cylinders 11 and 12 and first and second blanket cylinders 13 and 14. It has the same diameter as the diameter. The transfer cylinder 18 holds and conveys the leading end of the printing paper received from the first impression cylinder 15 by a gripper (not shown), and delivers the leading end of the printing paper to the gripper of the second impression cylinder 16.

  A paper discharge cylinder 19 disposed adjacent to the second impression cylinder 16 has the same diameter as that of the first and second plate cylinders 11 and 12 and the first and second blanket cylinders 13 and 14. Have. The discharge drum 19 has a structure in which a pair of chains 23 are wound around both ends thereof, and a gripper is disposed on a connecting member (not shown) that connects the pair of chains 23. The leading end portion of the printing paper held by the gripper of the second impression cylinder 16 is held by any of the grippers of the discharge cylinder 19 when the printing paper is transferred from the second impression cylinder 16 to the discharge cylinder 19. The The printing paper is discharged onto the paper discharge unit 32 as the chain 23 moves.

  A gear attached to the end of the paper feed cylinder 17 is connected to a gear 26 that is arranged concentrically with the driven pulley 25. A belt 29 is wound between a driving pulley 28 and a driven pulley 25 that are rotated by driving the motor 27. For this reason, the paper feed cylinder 17 is rotated by the drive of the drive motor 27. On the other hand, the first and second plate cylinders 11 and 12, the first and second blanket cylinders 13 and 14, the first and second impression cylinders 15 and 16, the paper feed cylinder 17, the transfer cylinder 18 and the paper discharge cylinder 19 are connected by the gear attached to the edge part, respectively. For this reason, by driving the drive motor 27, the feed cylinder 17, the first and second impression cylinders 15, 16, the discharge cylinder 19, the first and second blanket cylinders 13, 14, the first, first, The two plate cylinders 11 and 12 and the transfer cylinder 18 rotate in synchronization with each other.

  Around the first plate cylinder 11, an ink supply device 20a for supplying, for example, black (K) ink to the printing plate, and an ink supply device for supplying, for example, cyan (C) ink to the printing plate 20b and dampening water supply devices 21a and 21b for supplying dampening water to the printing plate are arranged. Further, around the second plate cylinder 12, an ink supply device 20c for supplying, for example, magenta (M) ink to the printing plate, and an ink for supplying, for example, yellow (Y) ink to the printing plate. A supply device 20d and dampening water supply devices 21c and 21d for supplying dampening water to the printing plate are arranged.

  Further, around the first plate cylinder 11 or the second plate cylinder 12, a plate feeding section 33 for supplying a printing plate to the outer peripheral portion of the first plate cylinder 11, and a second plate cylinder, respectively. A plate supply unit 34 for supplying a printing plate to the outer periphery of the first plate cylinder, an image recording device 35 for recording an image on the printing plate mounted on the outer periphery of the first plate cylinder 11, and a second plate cylinder An image recording device 36 for recording an image on a printing plate mounted on the outer peripheral portion of 12 is disposed.

  FIG. 2 shows the ink supply device 20a among the ink supply device 20a, the ink supply device 20b, the ink supply device 20c, and the ink supply device 20d described above (collectively referred to as “ink supply device 20”). FIG. 3 is a schematic side view, and FIG. 3 is a plan view thereof. In addition, in FIG. 3, illustration of the ink 50 is abbreviate | omitted.

  The ink supply device 20 has an ink source roller 51 arranged with its axial direction oriented in the width direction of the printed matter (direction orthogonal to the printing direction by the printing press), and a plurality of ink rollers 52 (one in FIG. 2). And an ink transfer roller 53 that swings between an ink base roller 51 and an ink roller 52 disposed at the tip. In addition, the ink supply device 20 is arranged in L rows corresponding to the L regions divided in the width direction of the printing paper, and each can adjust the opening degree with respect to the outer circumferential surface of the ink source roller 51. The ink key 54 (1), 54 (2),... 54 (L) (referred to collectively as “ink key 54”), and the ink source roller 51 and the ink key 54. The ink 50 can be stored in the ink fountain.

  On the back side of each ink key 54, L eccentric cams for respectively pressing the ink key 54 toward the surface of the ink source roller 51 in order to change the opening degree of each ink key 54 with respect to the ink source roller 51. 55 is disposed. Each of these eccentric cams 55 is connected to an L number of pulse motors 57 for rotating the eccentric cam 55 via a shaft 56.

  When an ink key drive pulse is applied to the pulse motor 57, the eccentric cam 55 is rotated around the shaft 5 by driving the pulse motor 57, and the pressing force to each ink key 54 is changed. The opening degree of the ink key 54 relative to the ink base roller 51 is changed, and the amount of ink supplied to the printing plate is changed.

  FIG. 4 shows the dampening water supply device 21a, dampening water supply device 21b, dampening water supply device 21c, dampening water supply device 21d (referred to as “dampening water supply device 21” when these are collectively referred to). ) Is a schematic side view of the fountain solution supply device 21a.

  The dampening water supply device 21 a is supplied by a dampening water supply unit including a water boat 74 that stores dampening water, a water source roller 75 that is rotated by driving a motor 78 described later, and a water source roller 75. And two water rollers 76 and 77 for transferring the fountain solution to the surface of the printing plate mounted on the outer peripheral portion of the first plate cylinder 11. In this dampening water supply device, the supply amount of dampening water supplied to the surface of the printing plate can be adjusted by changing the rotation speed of the water source roller 75.

  FIG. 5 is an enlarged view of the vicinity of the ink supply device 20d and the fountain solution supply device 21d.

  This printing machine includes temperature sensors 101 and 102. The temperature sensor 101 is for measuring the environmental temperature near the printing press, and uses a thermocouple type thermometer. The ambient temperature may be the temperature inside the printing press or the temperature outside the printing press. The temperature sensor 102 is for measuring the temperature of the ink on the ink roller, and uses a radiation type thermometer that measures the target temperature from infrared light. One temperature sensor 102 may be provided for each of the ink supply device 20a, the ink supply device 20b, the ink supply device 20c, and the ink supply device 20d, or only for one of the ink supply devices 20. You may set up.

  FIG. 6 is a block diagram showing the main electrical configuration of the printing press.

  The printing machine includes a control unit 80 including a ROM 81 that stores an operation program necessary for controlling the apparatus, a RAM 82 that temporarily stores data and the like during control, and a CPU 83 that executes logical operations. The controller 80 is connected to the temperature sensors 101 and 102 described above via an interface 84. The control unit 80 is connected via an interface 84 to a drive circuit 85 that generates a drive signal of a drive unit in the ink supply device 20, the dampening solution supply device 21, the image recording devices 35 and 36, and the like. ing. The control unit 80 includes a touch panel control panel using liquid crystal, and is connected to an input / output unit 87 capable of inputting data and displaying images. Further, the control unit 80 is also connected via an interface 84 to an image data supply unit 86 that stores data of an image to be subjected to plate making and printing.

  The printing machine is controlled by the control unit 80, and executes a printing operation including a plate making operation and an ink and fountain solution supplying operation which will be described later.

  In the printing machine having the above-described configuration, the printing plate drawn from the supply cassette 41 in the plate supply unit 33 is cut into a predetermined size by the cutter 42. Then, the leading end portion of the cut sheet-like printing plate is guided by a guide roller and a guide member (not shown), and is held by a holding claw of the first plate cylinder 11. Then, the first plate cylinder 11 is rotated at a low speed by driving a motor (not shown), the printing plate is wound around the outer peripheral portion of the first plate cylinder 11, and the rear end portion of the printing plate is held by the other holding nail. . In this state, while rotating the first plate cylinder 11 at a high speed, the image recording device 35 irradiates the surface of the printing plate held on the outer periphery of the first plate cylinder 11 with a modulated laser beam, Record.

  Similarly, the printing plate drawn out from the supply cassette 43 in the plate supply unit 34 is cut into a predetermined size by the cutter 44. Then, the leading end portion of the cut sheet-like printing plate is guided by a guide roller and a guide member (not shown), and is held by a holding claw of the second plate cylinder 12. Then, the second plate cylinder 12 is rotated at a low speed by driving a motor (not shown), the printing plate is wound around the outer periphery of the second plate cylinder 12, and the rear end portion of the printing plate is held by the other holding nail. . In this state, while rotating the second plate cylinder 12 at a high speed, the image recording device 36 irradiates the surface of the printing plate held on the outer periphery of the second plate cylinder 12 with a modulated laser beam, Record.

  A printing plate for printing with black ink and a printing plate for printing with cyan ink are mounted on the outer periphery of the first plate cylinder 11. These two printing plates are arranged at positions where they are evenly distributed (that is, separated from each other by 180 degrees), and the image recording device 35 records an image on these printing plates. Similarly, a printing plate for printing with magenta ink and a printing plate for printing with yellow ink are mounted on the outer periphery of the second plate cylinder 12. These two printing plates are also arranged at positions where they are equally distributed, and the image recording device 36 records an image on these printing plates, and the plate making process is completed.

  When the plate making process is completed, a printing process is performed in which printing is performed on printing paper using the printing plates on the first and second plate cylinders 11 and 12. This printing process is performed as follows.

  That is, first, each fountain solution supply device 21 and each ink supply device 20 are brought into contact only with the corresponding printing plates among the printing plates held on the first and second plate cylinders 11 and 12. Accordingly, the dampening water and the ink are supplied to each printing plate from the corresponding dampening water supply device 21 and the corresponding ink supply device 20. The ink supplied to the printing plate is transferred to corresponding areas of the first and second blanket cylinders 13 and 14.

  Then, the printing paper is supplied to the paper feed cylinder 17. This printing paper is delivered from the paper feed cylinder 17 to the first impression cylinder 15. When the first impression cylinder 15 that has received the printing paper continues to rotate, the first impression cylinder 15 has a diameter that is ½ that of the first plate cylinder 11 and the first blanket cylinder 13. On the printing paper held on the outer peripheral portion of one impression cylinder 15, black ink is transferred in the first rotation and cyan ink is transferred in the second rotation.

  If the first impression cylinder 15 rotates twice, the printing paper is transferred from the first impression cylinder 15 via the transfer cylinder 18 to the second impression cylinder. When the second impression cylinder 16 that has received the printing paper continues to rotate, the second impression cylinder 16 has a diameter that is ½ that of the second plate cylinder 12 and the second blanket cylinder 14. On the printing paper held on the outer periphery of the second impression cylinder 16, magenta ink is transferred in the first rotation, and yellow ink is transferred in the second rotation.

  In this way, the leading end portion of the printing paper on which the printing of four colors has been completed is transferred from the second impression cylinder 16 to the discharge cylinder 19. Then, the printing paper on which the printing of the four colors has been completed is conveyed toward the paper discharge unit 28 by the drive of the pair of chains 23 and is discharged. At this time, the printing paper being conveyed is photographed by the imaging unit 60.

  When the printing process is completed, the printing plate used for printing is discharged. Then, the first and second blanket cylinders 13 and 14 are cleaned by a blanket cylinder cleaning device (not shown), and the printing process is completed.

  Next, an ink supply operation including an ink temperature preset process which is a characteristic part of the present invention will be described. FIG. 7 is a flowchart showing the ink supply operation according to the present invention.

  As described above, the temperature of the ink on the ink roller at the start of printing is generally lower than the temperature of the ink when it reaches equilibrium during printing, so at the beginning of printing, In many cases, the density becomes low and a large number of splinter paper is required. Therefore, in the present invention, when printing is started at the beginning of the day, ink is supplied by the process shown in FIG.

  That is, first, a warm-up operation process is executed (step S11). In this warm-up operation step, the ink roller 52 is rotated at a low speed without performing the ink supply operation by the ink transfer roller 53, and the ink key 54 is opened / closed by driving the pulse motor 57, whereby the ink roller 52, etc. Is a process of warming up. This warm-up operation process is normally performed continuously for about 10 minutes.

  Next, an ink key preheating process is executed (step S12). This ink key preheating step is a step of heating the ink key 54 and the like by opening and closing the ink key 54 by driving the pulse motor 57 while the rotation of the ink base roller 51 is stopped. In this ink key preheating process, the ink key 54 is opened and closed about 100 to 200 times.

  Next, a first inking process is executed (step S13). In this first inking process, the ink source roller 51 and the ink roller 52 are rotated with the ink key 54 opened by a certain amount, and the ink on the ink source roller 51 is transferred to the ink roller 52 by the ink transfer roller 53. It is.

  Thereafter, an ink temperature preset process (steps S14 to S18) is executed.

  That is, the environmental temperature near the printing press is measured by the temperature sensor 101 (step S14). Then, based on the environmental temperature, the printing equilibrium temperature, which is the temperature of the ink when the equilibrium state is achieved by continuously executing printing, is estimated (step S15).

  FIG. 8 is a graph showing the relationship between environmental temperature and ink temperature.

  In this figure, A is the temperature of the dampening water in the water boat 74 shown in FIG. 4, B is the environmental temperature described above, C is the temperature of the ink on the surface of the ink roller 52, and D is the surface of the ink source roller 51. E indicates the temperature of the ink, E indicates the temperature of the ink 50 in the ink fountain, and F indicates the temperature of the ink key 54. A, b, and c show graphs when the environmental temperatures are 19 degrees Celsius, 24 degrees Celsius, and 29 degrees Celsius, respectively. The temperature of the ink on the surface of the ink roller 52 rises when printing is continued, but is affected by the dampening water supplied to the printing plate and becomes about 5 to 8 degrees higher than the environmental temperature. It becomes saturated in the state.

  FIG. 9 is a graph showing the relationship between the temperature of the ink on the ink roller 52 when the ink reaches an equilibrium state, that is, the printing equilibrium temperature and the environmental temperature, created based on the measurement result.

  In FIG. 9, the vertical axis represents the printing equilibrium temperature, and the horizontal axis represents the environmental temperature. The printing equilibrium temperature is estimated using this graph and the environmental temperature measured by the sensor 101. The estimated printing equilibrium temperature is stored as a set temperature.

  Thereafter, the ink roller 52 is rotated at a higher speed than the warm-up operation process (step S16). At this time, the supply of ink to the ink roller 52 by the ink transfer roller 53 is stopped. In this state, the temperature of the ink on the surface of the ink roller 52 is measured by the temperature sensor 102, and it is determined whether or not the measured value is the installation temperature, that is, the printing equilibrium temperature (step S18).

  When the temperature of the surface of the ink roller 52 reaches the set temperature, an ink supply operation during normal printing is executed. That is, after adjusting the opening of the ink key 54 to the opening corresponding to the pattern to be printed next (step S19), the ink transfer roller 53 rotates the ink roller 52 while the ink roller 52 is rotated. At the same time, the conveyance of the printing paper is started and the printing process by the printing machine is started. (Step S20).

  By performing such a preparatory step before a general ink supply operation, the temperature of the ink on the ink roller 52 can be quickly brought close to the temperature of the ink in an equilibrium state during printing.

  FIG. 10 is a graph showing the relationship between the number of printed sheets and the ink solid density.

  In this figure, the horizontal axis represents the number of printed sheets from the start of the printing process, and the vertical axis represents the ink solid density. Moreover, in this figure, a has shown the case where only the first inking process (step S13) shown in FIG. 7 is performed. Moreover, b has shown the case where the warming-up operation process (step S11) and the first inking process (step S13) shown in FIG. 7 are performed. C shows the case where the warm-up operation step (step S11), the first inking step (step S13), and the ink temperature preset step (steps S14 to S18) shown in FIG. 7 are executed. Furthermore, d is a warm-up operation step (step S11), an ink key preheating step (step S12), a first inking step (step S13), and an ink temperature preset step (steps S14 to S18) shown in FIG. This shows the case of execution.

  As is apparent from this graph, the warm-up operation process (step S11), the first inking process (step S13), and the ink temperature preset process (steps S14 to S18) are performed, so It is possible to quickly bring the temperature of the ink to the temperature of the ink in the equilibrium state during printing.

  In the above-described embodiment, the temperature of the ink on the ink roller 52 is measured by the temperature sensor 102, and the ink temperature preset process is completed when the temperature of the ink reaches a preset temperature. However, the ink temperature preset process may be executed for a predetermined time set in advance based on the environmental temperature.

  FIG. 11 is a flowchart showing the ink supply operation in such an embodiment. In addition, about the process similar to the flowchart shown in FIG. 7, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In this embodiment, based on the environmental temperature measured in step S14, the ink roller is set in a state where the ink temperature preset process should be continued, that is, in a state where the ink supply to the ink roller 52 by the ink transfer roller 53 is stopped. The set time for which the rotation of 52 should be continued is estimated (step S17A). When the set time elapses, the ink temperature preset process is terminated (step S18A). By adopting such an embodiment, the temperature sensor 102 can be omitted.

  The embodiment shown in FIG. 7 is for bringing the temperature of the ink on the ink roller 52 closer to the temperature of the ink in the equilibrium state when printing is started at the beginning of the day. Even when printing is resumed after a lapse of time, the temperature of the ink on the ink roller 52 is lower than the equilibrium temperature. Therefore, it is preferable to execute the same ink temperature preset process as that of the above-described embodiment.

  In the description using the flowcharts of FIG. 7 and FIG. 11, the actual printing is performed after the ink temperature preset process is completed (that is, after the determination process of Step S18 or Step S18A becomes “Yes”). The ink key opening degree adjustment process (step S19) was changed. However, the printing preparatory work of the printing press is completed by the completion of the ink temperature preset process, and the actual printing is not always started after this preparatory work. If the printing preparation work described in steps S11 to S17 (S17A) is completed at the beginning of the day and the printing press is put into a printing state, even if a temporary job occurs, the worker can make a short preparation. Since it is possible to start printing the actual printed matter in time, the work efficiency can be improved.

  FIG. 12 is a flowchart showing the ink supply operation according to the present invention in the case where printing is resumed after a lapse of a predetermined time.

  When resuming printing after a certain period of time has elapsed, the warm-up operation process (step S11), the ink key preheating process (step S12), and the first inking process (step S13) in the above-described embodiment are omitted.

  That is, first, the environmental temperature near the printing press is measured by the temperature sensor 101 (step S31). Then, based on the environmental temperature, the printing equilibrium temperature, which is the temperature of the ink when the equilibrium state is achieved by continuously executing printing, is estimated (step S32). Thereafter, the ink roller 52 is rotated at a high speed (step S33). At this time, the supply of ink to the ink roller 52 by the ink transfer roller 53 is stopped. In this state, the temperature of the ink on the surface of the ink roller 52 is measured by the temperature sensor 102, and it is determined whether or not the measured value is the installation temperature, that is, the printing equilibrium temperature (step S35).

  When the temperature of the surface of the ink roller 52 reaches the set temperature, an ink supply operation during normal printing is executed. That is, after the opening of the ink key 54 is adjusted to the opening corresponding to the pattern to be printed next (step S36), the ink transfer roller 53 rotates the ink roller 52 while the ink roller 52 is rotated. At the same time, the conveyance of the printing paper is started and the printing process by the printing machine is started. (Step S37).

  As described above, when printing is resumed after a certain period of time has elapsed after executing printing, the temperature of the ink on the ink roller 52 is quickly adjusted to the equilibrium state during printing by executing such a preparation step. It becomes possible to approach the temperature of the ink.

  FIG. 13 is a graph showing the relationship between the number of printed sheets and the ink solid density.

  In this figure, the horizontal axis indicates the number of printed sheets, and the vertical axis indicates the ink solid density. In this figure, a shows the case where the ink temperature preset process (steps S31 to S35) shown in FIG. 11 is executed, and b shows the case where the ink temperature preset process (steps S31 to S35) is not executed. ing. As is apparent from this figure, the ink temperature preset process (steps S31 to S35) is executed to quickly bring the ink temperature on the ink roller 52 closer to the temperature of the ink in the equilibrium state during printing. Is possible.

  Also in the above-described embodiment, the temperature of the ink on the ink roller 52 is measured by the temperature sensor 102, and the ink temperature preset process is completed when the temperature of the ink reaches a preset temperature. However, as in the embodiment shown in FIG. 11, the ink temperature preset step may be executed for a predetermined time set in advance based on the environmental temperature.

  FIG. 14 is a flowchart showing an ink supply operation in such an embodiment. In addition, about the process similar to the flowchart shown in FIG. 12, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In this embodiment, based on the environmental temperature measured in step S31, the ink roller is set for a set time for continuing the ink temperature preset process, that is, in a state where the supply of ink to the ink roller 52 by the ink transfer roller 53 is stopped. The set time for which the rotation of 52 is to be continued is estimated (step S34A). When the set time elapses, the ink temperature preset process is terminated (step S35A). By adopting such an embodiment, the temperature sensor 102 can be omitted.

1 is a schematic diagram of a printing machine to which the present invention is applied. 2 is a schematic side view of an ink supply device 20. FIG. 3 is a plan view of the ink supply device 20. FIG. It is a side surface schematic diagram of the dampening water supply apparatus 21a. It is an enlarged view of the vicinity of the ink supply device 20d and the fountain solution supply device 21d. It is a block diagram which shows the main electrical structures of this printing machine. It is a flowchart which shows the supply operation | movement of the ink which concerns on this invention. It is a graph which shows the relationship between environmental temperature, the temperature of ink, etc. FIG. It is a graph which shows the relationship between printing equilibrium temperature and environmental temperature. It is a graph which shows the relationship between the number of printed sheets and ink solid density. It is a flowchart which shows the supply operation | movement of the ink in other embodiment. It is a flowchart which shows the supply operation | movement of the ink which concerns on this invention in the case of restarting printing after progress for a fixed time. It is a graph which shows the relationship between the number of printed sheets and ink solid density. It is a flowchart which shows the supply operation | movement of the ink in other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 1st printing cylinder 12 2nd printing cylinder 13 1st blanket cylinder 14 2nd blanket cylinder 15 1st impression cylinder 16 2nd impression cylinder 17 Paper feed cylinder 18 Transfer cylinder 19 Paper discharge cylinder 20 Ink supply Device 21 Dampening water supply device 31 Paper feed portion 32 Paper discharge portion 33 Plate feed portion 34 Plate feed portion 35 Image recording device 36 Image recording device 51 Ink source roller 52 Ink roller 53 Ink transfer roller 54 Ink key 55 Eccentric cam 57 Pulse Motor 80 Control unit 101 Temperature sensor 102 Temperature sensor

Claims (13)

A printing preparation method for a printing press that supplies ink in an ink fountain equipped with an ink key and an ink base roller to a printing plate via an ink transfer roller and a plurality of ink rollers,
A warm-up operation process in which the ink roller is rotated at a low speed in a state where the ink supply to the ink roller by the ink transfer roller is stopped;
A first inking process in which ink is supplied to the ink roller by the ink transfer roller while the ink roller is rotated;
An ink temperature preset process in which the ink roller is rotated at a higher speed than the warm-up operation process while the ink supply to the ink roller by the ink transfer roller is stopped;
A printing preparation method for a printing press, comprising: In the printing preparation method of the printing machine of Claim 1,
An adjustment process for adjusting the opening of the ink key to the opening corresponding to the pattern to be printed next;
An ink supply step of supplying ink to the ink roller by the ink transfer roller in a state where the ink roller is rotated. In the printing preparation method of the printing machine of Claim 2,
In the ink temperature preset process, measure the temperature of the ink on the ink roller,
A printing preparation method for a printing press, which finishes an ink temperature preset process when the temperature of the ink reaches a preset temperature. In the printing preparation method of the printing machine of Claim 3,
In the ink temperature preset process, measure the environmental temperature near the printing press,
A printing preparation method for a printing press that determines the set temperature based on the environmental temperature. In the printing preparation method of the printing machine of Claim 2,
A printing preparation method for a printing press that executes an ink temperature preset process for a preset time. In the printing preparation method of the printing machine of Claim 5,
In the ink temperature preset process, measure the environmental temperature near the printing press,
A printing preparation method for a printing press that determines the set time based on the environmental temperature. In the printing preparation method of the printing machine in any one of Claims 1 thru | or 6,
A printing preparation method for a printing press, wherein the opening degree of the ink key is changed a plurality of times in the warm-up operation step. In the printing preparation method of the printing machine in any one of Claims 1 thru | or 6,
Between the warm-up operation process and the first inking process,
A printing preparation method for a printing press comprising an ink key preheating step in which the opening degree of the ink key is changed a plurality of times while the rotation of the ink base roller is stopped. Printing that supplies ink in an ink fountain equipped with an ink key and an ink source roller to a printing plate via an ink transfer roller and a plurality of ink rollers when printing is resumed after a certain time has elapsed after printing. An ink supply method of the machine,
An ink temperature preset process in which the ink roller is rotated while the ink supply to the ink roller by the ink transfer roller is stopped;
An adjustment process for adjusting the opening of the ink key to the opening corresponding to the pattern to be printed next;
An ink supply process for supplying ink to the ink roller by the ink transfer roller while the ink roller is rotated;
An ink supply method for a printing press, comprising: In the ink supply method of the printing machine according to claim 9,
In the ink temperature preset process, measure the temperature of the ink on the ink roller,
An ink supply method for a printing press, wherein the ink temperature preset process is terminated when the temperature of the ink reaches a preset temperature. The ink supply method for a printing press according to claim 10,
In the ink temperature preset process, measure the environmental temperature near the printing press,
An ink supply method for a printing press, wherein the set temperature is determined based on the environmental temperature. In the ink supply method of the printing machine according to claim 9,
An ink supply method for a printing press that executes an ink temperature preset process for a preset time. The ink supply method for a printing press according to claim 12,
In the ink temperature preset process, measure the environmental temperature near the printing press,
An ink supply method for a printing press, wherein the set time is determined based on the environmental temperature.