JP2532587B2 - Control method for multi-stage ball sheet manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention manufactures a single-sided corrugated board from a liner base paper and a mid-sinusoidal base paper, and performs all the steps of manufacturing a corrugated board sheet from this single-sided corrugated board and other liner base paper. The present invention relates to a method for automatically controlling a corrugated board sheet manufacturing apparatus.

[Conventional technology]

Corrugated cardboard sheets used for various purposes such as packaging containers are required to have a very wide variety of widths, thicknesses, laminated structures, materials, etc. according to their applications and purposes.

In order to meet such demands, the corrugated fiberboard sheet manufacturing plant may handle, for example, 800 types of base paper, and the type of paper size may range from 2200 to 1150 mm.
There are different widths by 50 mm, or there are various types of waste paper mixed with waste paper in various ratios, and all are made of virgin pulp.Manufacturing huge kinds of things by combining paper thickness, requirements for laminated structure, etc., Have to manage.

Such various and diverse corrugated cardboard sheets are conventionally fed to a single facer through a heating roll or the like from a device for supplying liner base paper and middle stencil base paper, and then corrugated, glued and laminated. , The single-sided corrugated sheet made by this is sent through the reservoir part, this is combined with another liner base paper, and glued, then heated, laminated and cooled with a double facer, and the whole process is
It is a huge one that stretches around 100m.

Also, the single facer and the double facer are driven by independent drive sources respectively, and due to the difference in these operating speeds, the single sided corrugated board is stored in a wavy shape in the storage part, or it is sent out for consumption and the entire device is consumed. It is designed to operate efficiently without stopping.

In such a conventional corrugated board sheet manufacturing process, various adjustments are made in each process. First, in the mill roll stand that supplies the base paper, adjust the paper feed tension,
With the heating roll provided on the way to the single facer, the amount of heat is adjusted by adjusting the heating contact area. In single phasor, adjustment of nip pressure between upper and lower rolls and between lower roll and press roll,
There are gap adjustments between the lower roll and the press roll, between the lower roll and the glue roll, and between the glue roll and the doctor roll, and adjustment of the suction pressure of the lower roll.
In the middle of sending from a single facer to a double facer,
Heat quantity adjustment by heating rolls, adjustment of water amount for shower for warpage prevention, adjustment of gap between rolls in glue machine, adjustment of injection steam amount of steam injector, and adjustment of heating amount by weight roll and heater in double facer It is necessary to adjust the cooling amount by the cooling unit.

Some of the various adjustments in the above-mentioned various control target parts are automatically adjusted by partially detecting the adjustment amount with a sensor, but in order to ensure the quality of the product in all the adjustment parts. It requires extremely delicate adjustment, and therefore, generally, all the processes cannot be simply automated, and fine adjustment is performed by the intuition and experience of a worker arranged at each adjustment site for many years.

[Problems to be Solved by the Invention]

As described above, in the conventional corrugated fiberboard sheet manufacturing process, in order to manufacture corrugated fiberboard sheets while maintaining the predetermined quality and precision, various applications are performed using various kinds of base paper.
Although various conditions required for each purpose must be satisfied, there are too many adjustment elements, items, parameters, devices, parts, etc. for that purpose, so some automation is possible, but the final The fine adjustment must be based on the intuition and experience of the workers who have been placed at each adjustment site. However, it is not possible to make perfect fine adjustments in all cases, such as fine adjustments based on human intuition and experience that if there are too many items to be adjusted, some will be satisfied but others will be insufficient. difficult.

In addition, the corrugated board sheet manufacturing equipment is extremely long, and the operating speed is different between the upstream single phasor side and the downstream double phasor side across the reservoir of the single-sided corrugated board. Specially, it is necessary to adjust the molding process and to properly hold the liner base paper to maintain this normal step, and to make a cardboard sheet with no warp on the double facer side to obtain a good quality product. However, it is difficult to automatically control the entire device to ensure good quality.

Further, the temperature of the single-faced corrugated board is reduced when the corrugated one-sided corrugated board is corrugated in the storage section due to the difference in operating speed between the upstream side and the downstream side, which may cause warpage of the corrugated board sheet on the downstream side.

Therefore, in order to manufacture corrugated cardboard sheets that can be used as products that ensure the prescribed quality and accuracy, the entire process needs to be adjusted from the supply of the base paper in order to adjust the entire process in the normal operating state of about 200 m / min at the traveling speed of the sheet. It is a continuous process that is consistent until the completion of the production of a given corrugated board sheet, and it is a process that continuously manufactures corrugated sheet sheets with different base paper configurations (combinations) of several hundred kinds per day, so there are many operations. It is not always easy to secure a uniform and high-quality product, etc. The problem of is included.

The present invention is to provide a method of controlling a corrugated board sheet manufacturing apparatus capable of solving the above problems.

(Problem solving means)

Therefore, in the present invention, as means for solving the above-mentioned problems, a mill roll stand for adjusting the tension to feed the core paper and the first liner base paper respectively, and the pressing pressure of one corrugating roll to the other corrugating roll are adjusted. To form a corrugated stencil paper into a corrugated form, and adjust the pressure to press or press the broccoli base paper to the other corrugated roll, and a pair of corrugated rolls that adhere the core to the corrugated paper. A single-faced corrugated board is equipped with a glue roll that adjusts the gap between the roll and the glue to attach the glue to the top of the corrugated paper and a pressing means that adjusts the pressing pressure of the liner base paper to the core paper and bonds them together. A single facer processing section (hereinafter referred to as the first step) to be made, a liner base paper supply section (hereinafter referred to as the second step) having a mill roll stand for adjusting the tension and sending out the second liner base paper, Tensioning means for adjusting the tension to the single-faced corrugated board running from the process through the reservoir, preheater and steam injection means for adjusting the heat quantity to heat the single-sided corrugated board, and water content for the single-sided corrugated board by adjusting the water injection amount. An intermediate treatment section (hereinafter referred to as a third step) provided with a water jetting means for giving a double facer (hereinafter referred to as a fourth step) by adjusting a heating amount to a corrugated cardboard sheet formed by bonding a single-sided corrugated board and a second liner base paper. ), The first running speed of the core paper, the first liner base paper, and the single-sided corrugated board that travels in the first step, including the above steps, is determined by the first operating speed of the first step, and the tension, suction pressure, and pressing force are applied. The first group having a portion for adjusting the pressure and the gap, the second liner base paper traveling in the second, third and fourth steps, the single-sided corrugated board and The second traveling speed of the corrugated board sheet is determined by the second operating speed of the fourth step, and the second group having a part for adjusting the tension, the heat quantity, and the water injection quantity is used. And a second computer corresponding to the second group, and at least one of input information relating to the paper quality, basis weight, paper width, step shape type, and first and second traveling speed of the base paper to be used. Alternatively, data necessary for optimally adjusting at least one of the adjustment sites for each of the first and second groups stored in advance corresponding to some of them may be stored in the first group as adjustment data. At least output from one computer, converted into a control signal and given to control at least tension, suction pressure, pressing pressure and clearance. One of the adjusting parts is output from the second computer to the adjusting part of the second group, converted into a control signal and given to control at least one of the adjusting actions of the tension, the heat amount, and the water injection amount. That is, the method for controlling the corrugated board sheet manufacturing apparatus is adopted.

[Action]

As a process for producing a corrugated board sheet, generally, there are provided two kinds of step shapes, for example, two single facer processing sections for producing single-sided corrugated sheet of A flute and B flute, a liner base paper supply section, an intermediate processing section, a double facer, etc. The single facer processing section supplies the liner base paper and the middle shin base paper mainly for the single facer. 2
Equipped with two base paper supply units. The intermediate processing section applies tension to the single-sided cardboard sheet and liner base paper, water jet,
Pretreatments for producing corrugated board sheets from these are given by heating, sizing, and steam injection.

In the two base paper supply units of the single facer processing unit, a braking force is applied by the mill roll stand, whereby the tension at the time of feeding the base paper is adjusted. With a single facer, either one or both of the pressing pressure (commonly called the nip pressure) and the gap between the upper roll, the lower roll, the press roll, the glue roll, and the doctor roll can be adjusted. It

The tension is adjusted in the liner base paper supply section. Tension, water injection amount, heating amount (steam injection amount) are adjusted in the intermediate processing section, and heating amount and gap are adjusted in the double facer.

In the present invention, the various adjustments as described above are performed based on the adjustment data necessary for each adjustment portion and stored in advance in the computer. The data for optimally adjusting each adjustment part is measured for each adjustment part in correspondence with the appropriate type of input information regarding the paper quality, basis weight, paper width, step shape type, and paper running speed of the base paper used. And is created and stored in advance based on experience.

Most preferably, adjustment data corresponding to all types of input information described above is used as the adjustment data.
When adjusting the tension, for example, ignoring the input information that does not significantly affect the quality of the corrugated board produced, the adjustment data corresponding to all types of input information such as paper quality, basis weight, step shape, and paper width are used. To be Similarly, the nip pressure between the rolls is adjusted by the above four input information, the gap between the rolls and the suction pressure of the lower roll by the adjustment data determined by the above four input information and the traveling speed. The water injection amount and the heating amount of the double facer are also adjusted by the adjustment data corresponding to the above four input information.

Such adjustment data is based on the information corresponding to each lot when the above input information is input to the computer.
A part equipped with a single facer processing part, which adjusts the tension, suction pressure, pressing pressure and gap by determining the running speed of the core paper, liner base paper and single-sided corrugated board running in this process depending on the operating speed of the single facer processing part. Is output from the first computer to the adjustment part of the first group having the above, and this is converted into a control signal and given, and the liner raw paper supply section, the intermediate processing section and the double facer are provided, and these steps are performed. The running speed of the liner base paper, single-sided corrugated board and corrugated board sheet is determined by the operating speed of the double facer, tension,
The second computer outputs to the adjustment unit of the second group having a unit for adjusting the heat quantity and the water injection amount, and this is converted into a control signal and given.

Therefore, mainly in the first group, it is adjusted so that the normal corrugated fiberboard can be formed and the normal corrugation can be held by proper adhesion to the liner base paper, and in the second group, A high-quality product can be obtained by adjusting the cardboard sheet to have no warp.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the corrugated board sheet manufacturing apparatus according to this embodiment includes an A flute single facer processing section and a B flute single facer processing section.
Flute single facer processing section, liner base paper supply section,
It consists of an intermediate processing unit and a double facer.

As shown in the figure, the A flute single facer processing section includes a liner base paper supply section 10A for supplying the liner base paper LP, a center liner base paper supply section 10A 'for supplying the center liner paper CP, and these 2
It is provided with a single facer 20A that performs step forming, gluing, and laminating upon receiving the supply of a single sheet of base paper, and a conveying section R that conveys a single-sided corrugated board manufactured by the single facer 20A.

Note that there is an independent drive source in this process, and the drive speed determines the running speed of the liner base paper LP, the midline paper base CP, and the single-sided corrugated board.

The B flute single facer processing unit has almost the same configuration as the A flute single facer processing unit (10B, 10B ',
20B, S), and only the step forming size of the single facer is slightly different.

The single-faced corrugated board made of the single facers 20A and 20B is sent to the sump section for accumulating them in corrugated form via the transfer sections R and S, respectively.

As in the conventional case, when manufacturing a double-sided corrugated board sheet as shown in FIG. 9 (a), both the A-flute and B-flute single-facer processing sections may be driven. When manufacturing a double-faced corrugated sheet of A flute or B flute as shown in FIG. 9 (b) or (c), respectively, one of the corresponding single facer processing units is driven, and In the case of a dedicated machine that manufactures only one of the double-sided corrugated sheet,
The corrugated board sheet manufacturing apparatus may be provided with only one of the corresponding single-facer processing units.

The liner base paper supply unit 10C is basically the same as that of each single facer processing unit (10A, 10B), and the liner base paper supply mill roll stand 11A, liner base paper L
It is provided with a splicer 12A for splicing the P paper, a preheater 13A provided in the feed path of the liner base paper LP, and the like. As a general rule, the middle paper base paper supply unit 10A 'has the same structure (11A', 12A ').
A ', 13A').

The intermediate processing unit 30 includes a brake roll 31 that applies a braking force to feed the single-sided corrugated board with a constant tension, a triple heater 32 for heating the single-sided corrugated board and the liner base paper, and a glue machine 34 that attaches glue to the single-sided corrugated board.

The double facer 40 is provided with a heating unit 40 'and a cooling unit 40 "for laminating single-sided corrugated board and liner base paper.

In addition, the double facer 40 has an independent drive source,
At this drive speed, the single-sided corrugated board stored in the storage section and the liner base paper LP of the liner base paper supply section 10C are conveyed in the downstream direction.

Therefore, the traveling speeds of the liner base paper LP, the single-sided corrugated board and the corrugated board sheet that travel through the steps of the liner base paper supply unit 10C, the intermediate processing unit 30 and the double facer 40 are determined by the drive speed of the double facer 40.

In the liner base paper supply section, the liner base paper LP is sandwiched between the two opposing arms 11a of the mill roll stand 11A via the support cone of the tip shaft section 11b (remains in a roll shape), and is provided at one end of the shaft section. The disc brake 11C controls the rotation of the mill roll stand so that a predetermined tension is applied to the raw paper pulled out from the mill roll stand by the raw paper conveyance force applied in a process lower than the mill roll stand. This tension adjustment is performed by the electro-pneumatic converter (not shown) for the disc brake, and the data stored in advance corresponding to the input information of the brand of the raw paper, the type of the A and B flutes, and the paper width supplied. By giving a command signal based on Similar adjustments are made on all other mill roll stands.

The heating amount is adjusted in the preheater 13A of each single facer processing section. As shown in FIG. 2, the heating amount is adjusted by rotationally driving the roller arm 13b provided with a pair of gears 13a for transmitting the motor driving force to change the contact area between the liner base paper LP and the heater roll 13c. The adjustment is performed by adjusting the optimum angular position determined by the control signal from the computer, such as the quality of the base paper, the basis weight, the type of flute, and the paper width. Similar adjustments are made for the other preheaters and triple heater 32.

In the single facer 20A, the pressing pressure (nip pressure), the gap, and the suction pressure are adjusted. This single facer 20A is, as shown in FIG. 3, an upper roll 21, a lower roll 22, a press roll 23, auxiliary equipment for adjusting the nip pressure between these rolls, gaps, etc. Glue unit for attaching glue
Consists of 24 etc.

The upper roll 21 and the lower roll 22 have tooth surfaces of a predetermined shape whose outer circumferences mesh with each other, and form the inner stencil paper CP supplied from the inner stencil paper supply unit 10A '. The cross-sectional shape of the tooth surface is corrugated, and is generally called an A flute or a B flute depending on the height of the unevenness, and in the case of this single facer 20A, it is an A flute shape.

The lower roll 22 has a proper axial center position (not shown).
Is rotatably supported at the position shown in FIG. 3, and the upper roll 21 and the press roll 23 with respect to the lower roll 22 are
It is adapted to be pressed with an appropriate pressure via a pressure cylinder acting on each roll shaft (only the pressure cylinder 25 for the press roller is shown). The lower roll 22 has the same diameter over the entire width, but the upper roll 21 and the press roll 23 have a slightly bulged central portion in the width direction (for example, a width of 200 m.
(0.3 mm with respect to m) so that a uniform nip pressure can be obtained over the entire width of each roll with the lower roll 22.

As shown in the figure, the press roll 23 is provided with a pair of left and right support plates 26 for supporting the rotation shaft thereof, and the support plates are rotatably supported with a support shaft 26X provided at an appropriate fixed portion as a viewpoint. It is pressed against the lower roll 22 via the pressure cylinder 25. Then, in order to adjust the gap between the press roll 23 and the lower roll 22 on the support plate 26, the rod 27 extending in the width direction of these rolls and the rod 27 and the support plate 26 at the position where this rod crosses the support plate 26. Each has a wedge 28 attached to it. A drive unit including a motor for rotating the screw shaft through a short screw shaft and a gear engaged with the screw shaft to move the rod 27 in the width direction of the roll is attached to one end of the rod, and the other end is attached. Is provided with a resistor for electrically detecting the amount of movement (gear, motor, resistor are not shown). Therefore, while the wedge 28 is adjusted to the predetermined gap position by the drive unit and the resistor, the pressure cylinder 25 presses the support plate 26 to that position to adjust the nip pressure and the gap.

It is necessary to adjust the nip pressure of the upper roll 21 with respect to the lower roll 22, but it is not necessary to adjust the gap, so that the rod 27, wedge 28 or the like for adjusting the gap is unnecessary. .

The single facer 20A is further provided with a glue unit 24 for adhering glue to the top of the middle shin base paper CP formed by the upper roll 21 and the lower roll 22. By adjusting the gaps between the doctor rolls 24b and the doctor rolls 24b and between the groups 24a and the lower rolls 22, the amount of glue adhered to the inner crease base paper CP is adjusted. The glue unit 24 is composed of the above two rolls, a glue tank 24c, and a casing 24d accommodating these rolls, and the glue roll 24a immersed in the glue tank is rotated so that the glue is adhered to the top of the broth base paper CP. The amount of glue adhered is adjusted by the doctor roll 24b.

The doctor roll 24b is rotatably supported by a bearing composed of an eccentric gear having both ends of its rotation shaft centered at a position eccentric from its rotation center, and the rotation shaft is moved by driving a pinion meshing with this eccentric gear with a motor. This adjusts the gap to the glue roll 24a (not shown).

The gap between the glue roll 24a and the lower roll 22 is adjusted by bringing the entire casing 24d of the glue unit 24 into and out of contact with the lower roll 22. Therefore, the pressure cylinder 24e, screw rod 24f, and bevel gear 24 are located outside the casing.
g, drive screw rod 24h, motor (not shown), etc. are provided, the pressing force from the pressure cylinder 24e is received by the screw rod 24f, and the position of the screw rod 24f is rotationally adjusted by the bevel gear, drive screw rod, and motor. The gap is finely adjusted.

In addition, adjustment of these nip pressures and gaps is based on the paper quality of the base paper,
This is appropriately performed by giving a command signal based on data stored in advance corresponding to input information such as basis weight, type of flute, and paper width from the computer to the pressure cylinder and the motor.

The lower roll 22 has a hollow inside, and is sucked by a suction pressure adjusted by a vacuum pump (not shown) that is appropriately connected to the suction port of the roll side plate through a piping member. Maintained at negative pressure. A large number of circumferential grooves are provided at appropriate intervals in the width direction on the outer peripheral gear of the lower roll 22, and are guided radially from the inside of the hollow through a conduction path 22a connected to the bottom of each circumferential groove. The adjusted negative pressure is guided to the outer peripheral surface, whereby a moderate suction pressure is given to the stepped middle cinnabar stencil paper, and the inner broth stencil paper CP is fed in close contact with the outer peripheral surface of the lower roll 22. .
For this reason, it is possible to prevent the precision from being deviated during the step formation, and it is possible to perform the accurate step forming.

On the upper left of the lower roll 22 is a side plate that fits in the circumferential groove.
22b is provided, which prevents the lowering of the suction force by closing the circumferential groove on the outer peripheral surface of the lower roll that is open at the upper left when the lower roll rotates, and the bonded single-sided corrugated board is It prevents it from wrapping around the lower roll 22.

Further, the single facer 20B is provided with a structure similar to that of the single facer 20A described above.

The suction pressure is adjusted by giving a command signal from the computer to the vacuum pump based on the data stored in advance corresponding to the input information such as the paper quality of the base paper, the basis weight, the type of flute, the paper width, and the running speed of the paper. It is done as appropriate.

The close contact of the inner lining base paper CP with the outer peripheral surface of the lower roll 22 may be performed by a conventional means of pressing the middle broth base paper CP against the lower roll 22 by applying high-pressure air, and in this case, if the pressing pressure is adjusted. Good.

A flute formed by each single phaser processing section,
The B-flute single-sided corrugated board is sent by the transport sections R and S, respectively, and passes through the reservoir section and the brake roll 31 of the intermediate processing section.
Reach In this brake roll 31, a disc brake (not shown) is provided at the rotary shaft end of the brake roll 31 in the same manner as the mill roll stand of each single facer processing unit. The braking force is applied so that the tension of each seat is constant.

The A-flute and B-flute single-sided corrugated board, and the liner base paper LP sent from the liner base paper supply unit 10c are heated by the triple heater 32. This heating is as described above.

Next, the two single-sided corrugated board and the liner base paper are sprayed with atomized water by the warp prevention shower 33. This water injection is performed in order to prevent the warpage of the corrugated board sheet caused by the unevenness of the water content of various base papers constituting the corrugated board sheet. The warp prevention shower 33 includes a shower head 33a extending in the width direction of the corrugated cardboard, and a plurality of injection holes 33b provided at appropriate intervals in a horizontal pipe portion of the shower head 33a (three stages are shown in this embodiment), Each shower head
33a and a solenoid valve (not shown) that adjusts the amount of water flowing to 33a. The amount of water jet is adjusted by adjusting the required amount of water with a solenoid valve according to the paper quality, the type of step shape, and the paper feed speed, and then spraying.

Then, glue is applied to the top of the single-sided corrugated board by the glue machine 34. The glue mechanism of the glue machine 34 is basically the same as the glue unit of the single facer processing section.
Therefore, the gaps between the glue roll and the single-sided corrugated board and between the glue roll and the doctor roll are adjusted. No gluing mechanism is provided for the lowermost liner base paper.

A steam injection unit 35 is provided next to the glue machine 34, and the heating amount is adjusted by adjusting the steam injection amount. This steam injection is performed in order to quickly solidify the glue attached to the single-faced corrugated board in the previous stage, improve the adhesive force, and increase the processing speed.

The steam injection unit 35 is appropriately arranged on the surface facing the step forming surface of the single-sided corrugated sheet of the steam header 35a having a rectangular cross section that extends horizontally in the width direction of the corrugated sheet, and is provided with a plurality of injection ports 35b at intervals, and further in the header pipe. Is provided with a plurality of heating pipes (not shown) through which high-temperature pressurized steam is passed, and the steam introduced into the header is heated to an appropriate temperature by the heating pipes and injected from the injection port 35b. The steam header 35a is provided with a solenoid valve for adjusting the amount of steam, and the amount of heating is adjusted by adjusting the amount of steam and the high-temperature pressurized steam by the heating pipe.

In addition, this adjustment is based on the paper quality of the base paper, basis weight, type of step shape,
This is appropriately performed by giving a command signal from the computer to the solenoid valve based on the data stored in advance corresponding to the input information regarding the paper width and the traveling speed of the paper.

FIG. 5 is an overall schematic view of the double facer. The double facer 40 is composed of a heating section 40 'and a cooling section 40 ". Therefore, heating and cooling are performed and the amount of heat is adjusted in order to complete the bonding and form double-faced corrugated board or double-sided corrugated board.

The heating unit 40 ′ includes a weight roll device 41 and a heating device 42. The weight roll device 41 includes a support rod 41a extending over the entire length of the heating device, a cylinder 41b provided on the top of each heating plate 42a, a lever arm 41c, and a weight roll 41d.
The weight roll 41d can be lifted by pushing. The driving of the cylinder is controlled by opening and closing a solenoid valve (not shown), and therefore data stored in advance corresponding to input information relating to the paper quality of the base paper, basis weight, type of step shape, and paper running speed is used. By doing so, the number of cylinders to be driven is appropriately selected by a control symbol from the computer, and the amount of heating is adjusted by this.

Further, the heating device 42 is composed of a plurality of heating plates 42a, into which heating steam is sent via a solenoid valve (not shown). Therefore, in order to adjust the heating amount of the heating plate 42a, by using data stored in advance corresponding to various input information similar to the above, the computer appropriately gives a control signal to the solenoid valve to the heating plate 42a. The heating steam amount of is adjusted.

The cooling unit 40 ″ includes a weight roll device 43, an endless belt 44 provided below the weight roll device 43, and a pair of pulleys 45. The weight roll device 43 drives the rods provided at both ends to remove the entire weight roll. A conventional type is used in which all of the weight rolls are lifted and lowered to a desired height all at once, and the height of the weight roll is determined by a control signal from a computer based on input information regarding the type of step shape.

An endless belt 46 extending over both the heating section 40 ′ and the cooling section 40 ″ and a pair of pulleys 47 are provided at the front and rear ends thereof, and the rear pulley 47 is rotationally driven by an independent drive source in synchronization with the pulley 45. The corrugated cardboard sheet is pulled by the conveying force of the belts 44 and 46 and runs at a predetermined speed.

A control circuit is provided for sequentially sending control commands for performing the above-described various adjustment operations in the processing section of each process to the drive device of each processing section along the flow of each process.

This control circuit includes an input device 100 and a host computer 1.
10, a sub-computer 120 (120A, 120B) for processing the first group having a single-flute single-facer processing section, and a second liner having a liner raw paper supply section for double-facer, an intermediate processing section and a double-facer Subcomputers for processing groups 13
Consists of 0.

In the input device 100, information on the paper quality, basis weight, paper width, type of step shape, and paper traveling speed of the base paper that constitutes one lot of corrugated board to be manufactured and processed according to the order is manufactured. Are sequentially input according to the above order and sent to the next host computer 110.

The host computer 110 responds to at least one of the input information or some of the input information, data for adjustment necessary to optimally adjust each adjustment site, and a sub computer for sending these adjustment data to each sub computer. All of the control data to be coordinated between the computers are stored. It should be noted that this adjustment data extends to several thousands which are determined in advance by actual measurement or experience and corresponding to each input information. Host computer 110
In fact, input information about a certain type of corrugated cardboard sheet to be manufactured is continuously stored for each rod, this time, next time, next time, and so on. The data for one lot of corrugated cardboard sheets to be processed at that time is sequentially sent to each sub computer.

Each of the sub-computers 120A, 120B, and 130 stores the transferred adjustment data for one lot of corrugated cardboard sheets to be processed at that time in the storage unit, and based on this, the adjustment parts of each processing unit are processed according to the flow of the process. Control sequentially. In the case of lots of corrugated cardboard sheets to be processed next, the corrugated sheet sheets of different lots can be manufactured successively and sequentially by similarly controlling them sequentially based on different input information.

FIG. 7 shows a schematic control circuit of the first group of sub-computers 120A and 120B for the A-flute and B-flute single-facer processing units.

When the adjustment data stored in the sub computer 120 is read by the signal from the host computer,
A control signal corresponding to the adjustment data is sent to the drive unit of each adjustment site via the controller 121.

As shown in the figure, the disc brake drive units 122 and 122 ', the preheater arm drive units 123 and 1 are used as drive units for the respective adjustment parts.
23 ', a pressure cylinder drive unit 124, and a suction device drive unit 125, and detectors 126, 127, 128 for upper rolls, press rolls, and doctor rolls are provided as detectors.

In each of the disc brakes of the mill roll stands 11 and 11 ', the electropneumatic converter is controlled by the disc brake drive units 122 and 122' based on the control signal from the controller 121, thereby adjusting the brake pressure thereof. . As the brake pressure, the tension acting on the center paper CP and liner paper LP sent at the operating speed of the single facer that manufactures single-sided corrugated board is determined by the paper quality, basis weight, step shape type, and paper width information. The pressure is selected so that it falls within the optimum range, and the pressure is increased / decreased and adjusted in accordance with the change in the diameter of the base paper roll so that the tension becomes as constant as possible within the range. When the pressure greatly differs depending on the paper width, the electropneumatic converter may be controlled to adjust the pressure.

In the preheaters 13 and 13 ', the motor of the roller arm is rotationally driven by the preheater arm driving unit 123 to adjust the heat amount. Although not shown, the arm movement angle due to the rotation of the motor is detected by a separately provided angle detector, and the contact area due to the movement of the arm increases with the origin being the point where the contact of the base paper with the preheater becomes almost zero. The moving angle of the direction is measured, the quality of the base paper,
The roller arm 13 until the angular position according to the adjustment signal from the controller 121 corresponding to the prestored data determined by the basis weight, the type of step shape, the paper width, and the feed speed is matched.
b is rotated.

The pressure cylinder drive unit 124 is composed of an electro-hydraulic (empty) converter, a drive circuit that drives a switching valve (solenoid valve), and the like, and includes pressure cylinders 21a and 25 for the upper roll 21 and the press roll 23 of the single facer 20. Drive each. Each pressure cylinder moves each roll so that the nip pressure between the two rolls becomes a predetermined value.

For the lower roll 22, vacuum pump, electro-pneumatic converter,
A suction device driving unit 125 that drives a suction device including a switching valve (electromagnetic valve) and the like is provided. The drive circuit of the suction device drive unit 125 is driven by the adjustment signal from the controller 121 corresponding to the pre-stored data determined by the paper quality of the base paper, the basis weight, the type of step shape, the paper width, and the feeding speed, The pressure is maintained at a predetermined suction pressure.

The detectors 126, 127, 128 are not just position sensors,
It serves to detect the gap between the rolls and adjust it to the target gap value. The detector 126 drives a gap adjusting device including a motor, a wedge, a gear device, a screw rod, and the like,
It comprises a drive and detection circuit that detects the amount of movement and holds the gap between the lower roll 22 and the press roll 23 at a target gap value. The motor is rotated and the screw rod 27 is advanced through the gear device to change the contact position with the wedge 28 to adjust the gap, and the movement amount is detected from the rotation amount of the motor.
The detector 127 is composed of a motor, an eccentric gear, a pinion, a drive that drives a gap adjusting device including an eccentric gear bearing, and a detection circuit.The motor drives the pinion and the eccentric gear to move the bearing position of the doctor roll 24b, The amount of movement is detected and the gap with the glue roll 24a is maintained at the target gap value. The detector 128 includes a drive and detection circuit that drives a gap adjusting device including a motor, a gear device, a screw rod, and the like, and also holds the target gap value. The motor is driven, and the screw rod 24h is rotated through the gear device to abut the casing 24d of the glue tank 24c, and the lower roll 22 and the glue roll 24a.
The gap between and is adjusted. The cylinder 24e shown in FIG. 3 is provided to surely bring the casing 24d into contact with the tip of the screw rod 24f.

In any of the gap adjustments described above, each roller moves until it reaches a predetermined position by an adjustment signal from the controller 121 corresponding to prestored data determined by the paper quality, basis weight, step shape type, paper width, and feed speed of the base paper. Adjusted.

In the first group above, especially
It is necessary to make adjustments so that the normal step is formed and the normal step is held by proper adhesion to the liner base paper LP.

For example, the tension of the middle paper base paper CP and the lower roll 22
If the suction pressure or the pressing pressure to the roller, the gap between the upper roll 21 and the lower roll 22 and the pressing pressure are not adjusted properly, there is a risk of impairing the normal molding of the stage. Further, if the gap between the lower roll 22 and the glue roll 24a and the gap between the glue roll 24a and the doctor roll 24b is not adjusted properly, the adhesiveness to the liner base paper LP is maintained in a state where the normal stage molding of the middle fold paper CP is held. It's difficult. In addition, the lower roll
If the nip pressure (pressing pressure) of the press roll 23 against 22 and the gap are not adjusted properly, the CP and the liner base paper
It may cause poor adhesion with LP or partial cutting of the central denier base paper CP or liner base paper LP at the nip part.

Therefore, in order to eliminate these inconveniences, in the first group, input regarding the paper quality, basis weight, paper width, type of step shape and running speed (speed determined by the operating speed of the single-facer processing unit) is used in the first group. The sub computer 120 outputs the data necessary for optimally adjusting at least one of the parts for adjusting these in the first group stored in advance corresponding to at least one or some of the information. Needs to be converted into a control signal and given to control at least one of the adjusting actions of tension, suction pressure, pressing pressure and gap.

Note that the sub-computers 120A and 120B may be combined into one, and in the case of a special paper for producing either one of the A flute and the B flute, a corresponding one of the sub computers is provided. Only need be.

FIG. 8 is a schematic system diagram of a sub-computer for controlling the liner base paper supply unit, the intermediate processing unit, and the double facer that form the second group. The disc brake drive units 132 and 133, the triple heater arm drive unit 134, and the glue machine roll drive unit 136 have basically the same functions as those of the single facer processing unit, and based on the respective data corresponding to various information. Tension, heat and gap are adjusted.

Sled prevention shower drive unit 135, steam injection unit drive unit 137, double facer heating unit, cooling unit drive units 138, 13
As described above, 9 controls each solenoid valve based on the control signal from the sub-computer 130 corresponding to various information, and adjusts the water injection amount and the heating amount.

In the above second group, it is particularly necessary to make adjustments so that the corrugated board sheet does not warp.

For example, the tension of single-sided corrugated board and liner base paper LP,
If the heat amount and the water injection amount are not properly adjusted, the corrugated board sheet may be warped.

Therefore, in order to eliminate this inconvenience, in the second group, at least one of the input information relating to the paper quality, basis weight, paper width, type of step shape and running speed (speed determined by the operating speed of the double facer) of the base paper to be used is used.
Stored in advance corresponding to one or some of them
The necessary data for optimally adjusting at least one of the parts for adjusting these in the group is output from the sub-computer 130 and converted into a control signal to give the tension,
It is necessary to control at least one of the adjusting functions of the heat quantity and the water injection quantity.

The sub-computer 130 is a liner base paper supply unit,
It may be provided corresponding to each of the intermediate processing unit and the double facer, or some of them may be collectively provided correspondingly.

In order to control the corrugated board sheet manufacturing apparatus of this embodiment configured as described above, codes of the following input information are created in advance, and these codes are input by the input device to perform the various controls and adjustments described above. Done.

FIG. 9 shows a general sectional shape of a corrugated board sheet produced by the corrugated board sheet manufacturing apparatus of this embodiment,
(A) is a double-sided corrugated board sheet consisting of A and B flutes, (b) is a double-sided corrugated board sheet of A flutes, (c)
Is a double-sided corrugated sheet of B flute.

Regarding the base paper used for manufacturing the corrugated board sheets having various cross-sectional shapes as described above, the following code symbols are attached in advance to the combinations of the paper quality and the basis weight of each kind. The combination of base paper quality and basis weight is 10
Although there are around 0, the following symbols are merely examples.

K300 …… Liner base paper, basis weight 300g / m ² B200 …… Liner base paper, basis weight 200g / m ² C180 …… Liner base paper, basis weight 180g / m ² SCP125 …… Nakashin base paper, basis weight 125g / m ² Above A double-sided corrugated board and a double-sided corrugated board are manufactured by combining the code-encoded base papers as described above, and the number of kinds of corrugated board sheets obtained by these combinations is considerable, and a code is given to each and given as input information. This code represents the brand of the corrugated cardboard sheet, and one of the brands is determined in advance according to the order.

 The following is also just an example.

Double-sided corrugated board front liner Middle shin liner Middle liner Middle shin liner Back liner 9A… B300 / SCP125 / B220 / SCP125 / B300 9B… K280 / SCP125 / K220 / SCP125 / K280 Double side corrugated board liner Middle shin liner Back liner 1A… C180 / SCP125 / C180 1B ... C210 / SCP125 / C210 Other information is: (1) Flute type ... A flute only, B flute only, or A and B flute information for double-sided corrugated sheet, ( 2) Paper width: As an example, there are three types of information: narrow, medium, and wide, (3) Running speed: Running speed of the base paper or corrugated cardboard sheet in each process.

〔effect〕

As described in detail above, in the present invention, the single-facer processing unit is provided, and the running speeds of the center paper, the liner base paper, and the single-sided corrugated board that travel in this process are determined by the operating speed of the single-facer processing unit, and A first group having parts for adjusting tension, suction pressure, pressing pressure and gap to obtain the normal step retention of the middle broth base paper and proper adhesion to the liner base paper, and the liner base paper. A liner base paper that has a supply section, an intermediate processing section and a double facer, and runs through these steps,
The traveling speed of the single-faced corrugated board and corrugated board sheet is determined by the operating speed of the double facer, and is divided into a second group having a part for adjusting tension, heat quantity and water injection quantity in order to obtain a corrugated board sheet without warping. Based on the amount, paper width, step shape type, and traveling speed information, some of the adjustment data stored in advance in the computer are read out as necessary and converted into upper control signals. Since the adjustment part of the group is controlled, it is extremely efficient to form a normal corrugated fiberboard corrugated board and to hold this normal corrugated board by properly adhering it to the liner cardboard, and to prevent the corrugated cardboard from warping. It can be done automatically in a short time, and the cost can be reduced. Moreover, since these adjustments are made by the optimum data based on the actual measurement or the experience, it is possible to prevent the variation of the adjustment which is caused by manual operation, and it is very useful for the quality improvement.

[Brief description of drawings]

FIG. 1 is an overall schematic view of a corrugated board sheet manufacturing apparatus for carrying out the control method according to the present invention, FIG. 2 is a schematic view of a preheater roll, FIG. 3 is a main sectional view of a single facer, and FIG. FIG. 5 is a partially enlarged view of the processing section, FIG. 5 is a schematic view of a double facer, FIG. 6 is a main system diagram of a control circuit, and FIG.
Fig. 8 is a schematic block diagram of the control circuit by the sub-computer of the single facer processing unit. Fig. 8 is a schematic block diagram of the control circuit by the sub-computer for the liner base paper supply unit, the intermediate processing unit and the double facer. It is a general sectional view. 10 …… Liner base paper supply section, 11 …… Mill roll stand, 13 …… Preheater, 20 …… Single facer, 30 …… Intermediate processing section, 40 …… Double facer.

Front Page Continuation (72) Inventor Ikuo Yoshimoto 1-1-12 Dainichi-cho, Moriguchi-shi, Osaka (72) Inventor Yosho Suwabe 8-28 Kuwata-cho, Ibaraki-shi, Osaka (56) References JP-A-51- 53995 (JP, A) JP 52-30599 (JP, A) JP 58-23216 (JP, A) JP 49-51092 (JP, A) JP 60-73319 (JP, A) JP 61-100609 (JP, A)

Claims (1)

(57) [Claims] 1. A mill roll stand that adjusts tension to feed a core paper and a first liner base paper, respectively, and a pressing pressure of one corrugating roll to the other corrugating roll is adjusted to corrugate the core paper. , Adjusting the pressure for sucking or pressing the central broth base paper to the other corrugated roll to adjust the gap between the pair of corrugated rolls that adhere the central broth base paper to this corrugated roll and the other corrugated roll. A single-facer processing unit (hereinafter referred to as the first facer processing unit for making a single-sided corrugated board is provided with a glue roll for adhering glue to the corrugated paper top and a pressing means for adjusting the pressing pressure of the liner base paper to the middle paper and adhering them. 1 line), a liner base paper supply unit (hereinafter referred to as the 2nd process) equipped with a mill roll stand that adjusts the tension and sends out the 2nd liner base paper, and a single-sided corrugated board that runs from the 1st process through the reservoir. An intermediate processing unit including a tension applying unit that adjusts and gives a tension, a preheater and a steam ejecting unit that adjusts the amount of heat to heat the single-sided corrugated board, and a water ejecting unit that adjusts the water injection amount to give water to the single-sided corrugated board. (Hereinafter referred to as "third step"), a double facer (hereinafter referred to as "fourth step") for adjusting and heating the amount of heat applied to the corrugated cardboard sheet made by bonding the single-sided corrugated board and the second liner base paper, and each step described above. The first running speed of the core paper, the first liner base paper, and the single-sided corrugated board traveling in the process is determined by the first operating speed of the first process,
The first group having a part for adjusting the tension, suction pressure, pressing pressure and gap, and the second running speed of the second liner base paper, single-sided corrugated board and corrugated board sheet that travel in the second, third and fourth steps are In a method of controlling a corrugated board sheet manufacturing apparatus, which comprises a second group having parts for adjusting tension, heat quantity and water injection quantity, which are determined by a second operation speed of four steps, a first computer and a second group corresponding to the first group. A second computer corresponding to the group is provided, and corresponding to at least one or some of the input information regarding the paper quality, the basis weight, the paper width, the type of the step shape, the first and second traveling speeds of the base paper to be used, and corresponding in advance. The data necessary for optimally adjusting at least one adjustment site for each of the stored first and second groups is stored as For the adjustment part of the group first
After being output from the computer, it is converted into a control signal and applied to control at least one of the adjusting actions of tension, suction pressure, pressing pressure, and gap, and output from the second computer to the adjusting portion of the second group. In addition, the method for controlling a corrugated board sheet manufacturing apparatus is characterized in that at least one of the adjusting actions of the tension, the amount of heat, and the amount of water jet is controlled by converting the control signal to give the control signal.