JP5515243B2 - Drying equipment, gravure printing machine and coater - Google Patents

Description

  The present invention relates to a drying apparatus in a gravure printing machine, a coater or the like.

  Generally, as a drying device used for gravure printing machines, coaters, etc., a heating drum method using steam or electric heat, an infrared lamp method, a hot air drying method, and a high frequency drying method are known. For these reasons, a hot-air drying type drying apparatus has become the mainstream.

  In the hot air drying method, printing air or coating ink or an adhesive is dried by spraying hot air on a printing surface or coating surface while passing through a web-like substrate through a plurality of guide rolls in a drying apparatus.

  FIG. 1 is an example of the arrangement of a plurality of guide rolls in a hot air drying device of a gravure printing machine or coater, and a web-like substrate 2 to be printed or applied is unwound from an unwinding roll (not shown). The plate 3 and the impression cylinder 4 which are the printing part or the application part are contacted and printed or applied. Thereafter, the web-like substrate 2 passes through a guide roll 5 (one in the case of FIG. 1) arranged outside the drying apparatus 1, and then a plurality of guide rolls 6 (in the case of FIG. 1) in the drying apparatus 1. 9) through the drying device 1. At this time, the web-like base material is passed so that the non-printing surface or the non-application surface of the web-like base material 2 is in contact with the guide roll 5 and the plurality of guide rolls 6, while the guide roll 5 and the plurality of guide rolls 6. Hot air (not shown) is blown onto the printing surface or coating surface that is not in contact with the substrate, and the printing surface or coating surface is dried. Further, the web-like substrate 2 is cooled by the cooling roll 7 and passed through the next printing unit or coating unit (not shown).

  The substrate 2 is printed or coated with one or a plurality of the printing units or coating units and a drying device, and further dried, and then wound around a winding roll (not shown).

  In the hot air drying system, the hot air temperature is increased or the hot air nozzle is increased because it is necessary to increase the drying capacity in accordance with the speed of printing or coating and the water-solubility of the ink or adhesive to cope with the environment. In addition to increasing the wind speed, the furnace length of the drying device is lengthened to increase the drying time.

  FIG. 2 is a diagram for explaining the outline of a gravure printing machine or coater. In a gravure printing machine or coater (hereinafter referred to as a printing machine or coater), a plurality of parts called units consisting of a printing plate or coating plate, a portion consisting of an impression cylinder and a drying device of a drying unit are provided (see FIG. 2 has 4 units).

  The web substrate 2 that has passed through the drying device is cooled by the cooling roll 7 and then passed to the next unit through a plurality of guide rolls 8 provided on the upper portion of the drying device.

  In a gravure printing machine or coater, printing or coating operations are performed in the following order.

  First, when the immediately preceding printing or coating operation is completed, the web paper 2 to be printed or coated next is set (the web substrate 2 is passed through a printing machine or a coater).

A method for setting the through-sheet will be described with reference to FIG. In general, the paper passing in the printing machine or the coater is performed by splicing the web substrate 2 to be used next to the web substrate 2 that has been printed or applied immediately before. That is, the web base material 2 that has been printed or applied with respect to the flow direction of the web base material 2 is a web base material that joins the unwinding roll 10 that unwinds the web base material 2 and the web base material 2. Cutting is performed at a position A between the joining rolls 12 and a position B between the winding rolls 13 as well as the winding rolls 11. Thereafter, the web substrate remaining on the unwinding roll 10 is removed from the printing machine or the coater together with the unwinding roll 10 and further printed or applied and wound on the take-up roll 11. It is.

  Thereafter, the web substrate mounted on the unwinding roll 10 to be printed or applied next is attached to a printing machine or coater, and the web substrate cut at the position A and the substrate joining roll 12 with a tape or the like. Pasted and spliced. Further, the printing press or the coater is operated at a low speed, and the web base material used in the printing or coating immediately before remaining in the printing press or the coater is pulled out and stuck on the base joint roll 12 with a tape or the like. When the joined portion reaches the take-up roll 13, the printing machine or the coater is stopped, and the web substrate to be printed or applied next is stuck on the take-up roll 13 to complete the operation of the threading paper. Next, printing or application adjustment, which is the next operation, is performed.

  For printing or application adjustment, in the case of a printing press, the color adjustment of printing and the so-called printing register between each color to be printed are matched, and in the case of a coater, the amount (or film thickness) of ink or adhesive applied is adjusted. There are things to do.

  After the above adjustment is made, a printing counter (not shown) is set to 0, the printing quantity is started, printing or application is started, and a necessary quantity is printed or applied.

  In the middle of printing or application, if the web substrate mounted on the unwinding roller 10 is not enough to print or apply the required printing quantity, the web substrate and unwinding roller 10 to be used next are used. The web substrate mounted on the machine is spliced by an automatic web substrate automatic joining device (not shown) called a paster without stopping the printing machine or coater, and printing or coating is performed to obtain the required quantity. A plurality of seams are made by the paster until it is done.

  Since the thickness of the web base is thicker than that of the other web base, the seamed part has a thickness of the plate 3 and the impression cylinder 4 of each unit until the seamed part passes from unit 1 to unit 4. The contact pressure is released, and after passing through each unit, the plate 3 and the impression cylinder 4 are contacted again to continue printing or coating.

  On the other hand, the web substrate that has been printed or applied and wound on the take-up roll 11 is automatically cut at the cutting portion B every time the quantity of one roll of the take-up roll is printed or applied. A take-up roll 13 is attached in place of the roll 11 by an automatic roll changer (not shown), and the substrate 2 is taken up by the take-up roll 13 and printing or coating is continued.

  When the necessary quantity of printing or coating is completed, the contact pressure between the plate 3 and the impression cylinder 4 of all units is released, the printing machine or coater is stopped, and the web substrate is cut at the positions A and B, Transition to the web paper feed setting for the next printing or coating.

  The problems of the prior art will be described below with reference to the drawings.

FIG. 3 shows an example in which there is a unit that is not used for printing or coating because there are a small number of colors to be printed or a small number of inks or adhesives to be applied, that is, there is a unit that does not use a drying device. A schematic diagram of the machine or coater is shown. In FIG. 3, units that do not require the use of a drying apparatus are referred to as unit 2 and unit 3.

  The web base material 2 used for printing or coating is dried in the drying device 1 through a plurality of guide rolls 6 in the drying device 1, but the plurality of guide rolls 6 are fixed and cannot move. Therefore, since the web substrate 2 is passed through all the plurality of rollers 6 in the unit 2 and unit 3 without using the drying device, the web base in the drying device of the unit 2 and unit 3 is also passed. The length through which the material 2 passes requires the same length as the length in the drying apparatus of the unit 1 and the unit 4 which require drying.

  That is, the length of the web substrate 2 in the unit 2 and the unit 3 is the loss of the web substrate at the time of the above-mentioned paper passing setting, the web substrate and the ink, the adhesive, etc. at the end of printing or coating (referred to as finishing) The loss of material costs.

  Also, the quantity to be printed or applied, so-called lot length, tends to be a small lot, and therefore, the number of printing or application switching increases, resulting in loss of material costs for the web substrate, ink, adhesive, etc. Occurs at each switching and causes a great loss.

  As a method for solving the above problem, as shown in FIG. 4, only a part of the guide rolls 6-1 and the guide rolls 6-2 of the nine guard rolls 6 in the drying apparatus 1 are provided with the web substrate 2. It is possible to pass through.

  However, in the above method, as shown in FIG. 5, the web base 2 is placed at a position C ahead of the guide roll 6-1 or a position D before the guide roll 6-2 with respect to the flow direction of the web base 2, for example. The web base material 2 is cut and joined without passing the remaining guide rolls 6-3 (seven in FIG. 5) of the guide rolls 6, and as shown in FIG. 4, the guide rolls 6-1 and 6-2 This is a method of shortening the length of the web substrate in the drying device 1 of the web substrate 2.

  Further, as shown in FIG. 6, for example, cutting is performed at positions E and F, and the base materials before and after that are joined together, so that the web base material does not have to use a drying device as shown in FIG. In this method, the length of the web substrate is shortened without passing through the drying devices of the unit 2 and the unit 3.

  However, in the above two methods, the position C and the position D to be cut are in a hermetically sealed drying apparatus in order to increase the drying efficiency, and further, in order to prevent adhesion of dust and the like at the positions E and F to be cut. The airtight structure is the same as that of the drying apparatus, and a great deal of labor is required for cutting and joining the base materials.

  Furthermore, since the quantity of printing or coating, so-called printing or coating lots, tends to be small in recent years, the number of times of switching of printing or coating, that is, the number of times of passing the web substrate 2 is increased.

  Further, in the method shown in FIG. 7, it is necessary to newly install the auxiliary guide roll 9, and there is a problem that the equipment cost becomes expensive.

  Another method different from the method of shortening the length of the web substrate is a plurality of printing machines with different numbers of units consisting of a plate of a printing unit or a coating unit, a portion consisting of an impression cylinder and a drying device of a drying unit, or Although a method of preparing a coater is conceivable, generally, a printing machine and a coater may use a minimum of 1 unit to a maximum of 9 units, and the above method is not adopted because the equipment cost increases.

  As described above, even when there is a unit that is not used for printing or coating, since the plurality of guide rolls in the drying device of the unit cannot move, the web substrate passes through the plurality of guide rolls. Therefore, the length of the web-like base material that passes through the inside of the drying apparatus becomes long, which causes a loss of materials such as the web-like base material, ink, and adhesive.

  The present invention shortens the length that the web-like substrate passes through the drying device of a unit that is not used for printing or coating as described above, and further finishes the printing when setting the through-paper without using the drying device. It is to provide a drying apparatus that minimizes the loss of the web base material and material by shortening the length of passage of the web-like base material in the drying apparatus at the time.

The invention according to claim 1 of the present invention, there is provided a drying apparatus for a web-like substrate to be attached to the printing machine or coater, which through the drying apparatus a web-like substrate can change the length to pass through, a plurality The web-like base material is passed so that the non-printing surface or non-application surface of the web-like base material is in contact with the plurality of guide rolls, and the plurality of guide rolls are convex at the time of printing or coating. The drying apparatus is provided so as to be movable in such a state that it is arranged in such a manner that it is arranged so as to be close to a flat surface at the time of passing paper setting and completion of printing .
The invention according to claim 2 of the present invention is a gravure printing machine including a printing unit having a plate and an impression cylinder in addition to the drying device according to claim 1, wherein the drying device and the printing unit include units. A gravure printing machine characterized in that it comprises at least two or more units.
The invention according to claim 3 of the present invention is a coater including a coating unit having a plate and an impression cylinder in addition to the drying device according to claim 1, wherein the drying device and the coating unit constitute a unit. In addition, the coater is characterized by having at least two units.

  The present invention can minimize the loss of web substrates and materials used for printing or coating.

  Embodiments of a drying apparatus according to the present invention will be described below with reference to the drawings.

  FIG. 8 is an example of the arrangement of a plurality of guide rolls in the drying device of the printing press or coater according to the present invention. The web-like substrate 2 is unwound from an unwinding device (not shown), and the plate 3 and The impression cylinder 4 is contacted and printed or applied. The web-like substrate is passed so that the non-printing surface or the non-application surface of the web-like substrate 2 is in contact with the guide roll 5 and the plurality of guide rolls 6. On the other hand, hot air (not shown) is blown onto the printing surface or application surface that is not in contact with the guide roll 5 and the plurality of guide rolls 6, and the printing surface or application surface is dried. Thereafter, the web-like substrate 2 is cooled by a cooling roll 7 and passed through the next printing unit or coating unit (not shown). On the other hand, the drying apparatus of the unit that does not perform printing or coating has a structure in which the guide roll 6-3 indicated by a dotted line among the plurality of guide rolls 6 moves downward.

  An example of a printing machine or a coater according to this embodiment is shown in FIG. Four units from a printing unit or coating unit consisting of a plate 3 and an impression cylinder 4 for printing or coating and a unit 1 to a unit 4 consisting of a drying device 1 are provided. The unit 1 and the unit 4 perform printing or coating. In the example, units 2 and 3 are units that do not perform printing or coating.

  Since the unit 1 and the unit 4 perform printing or coating on the base material 2, it is necessary to dry in the drying apparatus 1. Of the guide rolls 6 of the drying apparatus of the unit, seven guide rolls 6-3 protrude. In the unit 2 and the unit 3 that are arranged so as to be in a shape and do not perform printing or coating, it is not necessary to use a drying device, so the guide roll 6-3 is lowered and the drying device of the unit The length of the web-like substrate 2 in the drying apparatus 1 is moved to the position indicated by the guide roll 6-21 and is arranged so as to be closer to a plane than the arrangement arranged so as to form the protrusion. Can be changed to be shorter.

  When the drying device is not used, the impression cylinder 41 and the impression cylinder 42 are raised, the contact pressure with the plate 31 and the plate 32 is released, and the drying is stopped.

  Table 1 shows the relationship between the state of the printer or coater and the position of the guide rolls of the drying device used for printing or coating and the drying device not used for printing or coating.

  The state of the guide rolls in the drying apparatus will be described below in the order of the state of the printing press or coater using Table 1.

  In the state at the time of completion of the previous printing or coating, the positions of the guide rolls 6-21 (seven units in each unit in FIG. 10) in the drying devices of all units are close to a plane as shown in FIG. Has been moved to the state.

  The unit 2 and unit 3 drying devices that are not used for printing or coating do not need to be dried, so the guide rollers in the drying device are kept close to a flat surface from the time of passing paper setting to the end of printing. Is done.

  On the other hand, since it is necessary to perform drying in the drying apparatuses of unit 1 and unit 4 used for printing or coating, a plurality of guide rolls in the drying apparatus are not suitable for printing adjustment or coating adjustment, and during printing or coating. It moves to the state where it was arranged in a line.

  The guide roll may be moved by appropriately adopting known machine control methods and machine structures.

  The quantity which suppresses the loss of a base material by the said invention is estimated using FIG. Assuming that the length from the unwinding roll 10 to the winding roll 11 is, for example, 200 m (50 m per unit), the length of the base material in the drying apparatus of the unit 2 and the unit 3 is shortened (indicated by a broken line). I) When the total length of the length L1 in the unit 2 is 10 m and the length L2 in the unit 3 is 10 m, the total length is 20 m. (If the total amount of base material required for adjustment is 400 m) 40 m, 3) 20 m total loss of the base material at the time of completion of printing, and further loss of materials such as ink or adhesive printed or applied It is done.

    As described above, according to the drying device of the present invention, the length of the web substrate in the drying device can be shortened by changing the length that the web substrate passes through the drying device, and the guide roll is moved. By making it possible, it is possible to carry out the length of the web-shaped substrate passing through with a simple operation, and further, the guide rolls are arranged in a projecting shape, and are arranged so that it is closer to a plane than that By making it possible to move to the state, the length of the web-like substrate 2 in the drying apparatus 1 can be changed to be short, and the loss of the web substrate and material can be minimized.

The figure which shows an example of arrangement | positioning of the several guide roll in the hot air drying apparatus of a gravure printing machine or a coater A diagram showing the outline of a gravure printing machine or coater The figure which shows the outline which shows an example of a printing machine or a coater when there is a unit which does not use a drying device Diagram showing one method of passing web substrate The figure which shows the position which cut | disconnects the web base material for one method of passing a web base material Diagram showing the position to cut the web substrate for another way of passing the web substrate Diagram showing another way of passing web substrate The figure which shows an example of arrangement | positioning of the several guide roll in the drying apparatus of the printing machine or coater concerning this invention The figure which shows an example of the printing machine or coater which concerns on this embodiment The figure which shows that the guide roll in the drying apparatus of all the units was moved to the state near a plane. Diagram explaining the trial calculation of the quantity to suppress the loss of the base material

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Drying apparatus 2 ... Web base material 3 ... Plate 4 ... Impression cylinder 5 ... Guide roll 6 arrange | positioned outside drying apparatus 6 ... Multiple guide rolls in drying apparatus 6-1 ··· Some guide rolls in the drying device 6-2 ··· Some guide rollers in the drying device 6-3 ··· The guide roll 6-1 among the nine guide rollers 6 Seven guide rolls 6-21 excluding the guide roll 6-2 ... Guide roll 7 moved downward ... Cooling roll 8 ... Guide roll 9 arranged outside the drying device ... Spare guide roll 10 ... unwinding roll 11 ... winding roll 12 ... web base joint roll 13 ... winding roll 31 ... plate 32 ... plate 41 ... upward Moved impression cylinder 42... Moved upward impression cylinder L1... Since the length L2 · · · group length length becomes shorter of material A, B, C, D, E, cutting position of the F · · · web substrate

Claims (3)

A web-like substrate drying apparatus associated with a printing machine or a coater, wherein the length of the web-like substrate passing through the drying device can be changed, and includes a plurality of guide rolls. Pass the web-shaped substrate so that the non-printing surface or non-coating surface is in contact with the plurality of guide rolls, and the plurality of guide rolls are arranged in a convex shape at the time of printing or coating , and the paper is set A drying apparatus, wherein the drying apparatus is movably provided in a state of being arranged so as to be close to a flat surface at the time and at the time of completion of printing .   A gravure printing machine comprising a printing unit having a plate and an impression cylinder in addition to the drying device according to claim 1, wherein the drying device and the printing unit constitute a unit, and at least two or more units are provided. A gravure printing machine characterized by   In addition to the drying apparatus of Claim 1, it is a coater provided with the application part which has a plate | version | printing and an impression cylinder, Comprising: While comprising the unit by the said drying apparatus and application | coating part, this unit is provided with at least 2 or more. Coater characterized by that.

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