JP2003266569A - Double facer for corrugated board sheet manufacturing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress S-shaped warpage in the width direction of a corrugated board sheet in a double facer of a corrugated board sheet-manufacturing apparatus. <P>SOLUTION: In this double facer, a hot plate 162 is divided into a plurality of heating chambers 162a and 162a in the sheet width direction; and the amount of heat for heating sheet materials 22 and 23 in each heating chamber 162a can be individually regulated. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double facer for a corrugated board sheet manufacturing apparatus for manufacturing a double-faced corrugated board sheet by stacking a single-stage sheet and a front liner and sliding them on a hot platen to bond them together.

[0002]

2. Description of the Related Art Corrugated cardboard sheets are made of a single facer, and a single core sheet is prepared by adhering the cores stacked on one liner (back liner) with glue and then using a double facer. The other liner (front liner) is attached to the to produce a corrugated board sheet, and the corrugated board sheet is cut into a suitable length. In this manufacturing process, each sheet (back liner, front liner, single-sided sheet, corrugated cardboard sheet) is heated by each preheater such as a back liner preheater, single-sided sheet preheater, front liner preheater, etc., and a single facer or glue. Gluing is performed by the machine.

The heating of the single-sided sheet and the front liner with the double facer is carried out by pressing the front side of the superposed single-sided sheet and the front liner against the heating platen, whereby the single-sided sheet and the front liner are heated through the front liner. To be glued.

[0004]

Conventionally, since the hot platen of the double facer is integrally formed in the sheet width direction (direction intersecting the sheet conveying direction), the single-stage sheet and / or the front liner to be carried into the double facer. Even if there is moisture unevenness (= temperature unevenness) in the width direction, it cannot be removed, and the completed corrugated cardboard sheet has a widthwise S-shaped warp (hereinafter , Also referred to as S-shaped warp).

The present invention was devised in view of the above problems, and an object of the present invention is to provide a double facer for a corrugated board sheet manufacturing apparatus capable of suppressing the S-shaped warp of the corrugated board sheet in the width direction.

[0006]

Therefore, according to the double facer of the corrugated board sheet manufacturing apparatus of the present invention as set forth in claim 1, the single-sided sheet and the front liner are superposed and slid on the heating plate to be adhered to each other. In a double facer for producing a double-faced corrugated sheet, the hot platen is divided into a plurality of heating chambers along the sheet width direction,
The heating amount for the single-sided sheet and the front liner can be individually adjusted for each heating chamber.

The double facer of the corrugated board sheet manufacturing apparatus of the present invention according to claim 2 is the double facer according to claim 1, wherein the content of water in at least one of the one-sided sheet and the front liner or a parameter correlated with the content of water is The water content detecting means for detecting along the width direction, and the sheet width direction so that the water content of the one-sided sheet and the front liner becomes a predetermined water content based on the detection result of the water content detecting means. And a control means for individually controlling the heating amount of the heating chambers arranged side by side.

A double facer of a corrugated board sheet manufacturing apparatus according to a third aspect of the present invention is the double facer according to the second aspect, further comprising a pressurizing unit for pressurizing the single-stage sheet and the front liner against the hot platen. Based on the detection result of the water content detecting means, the control means first controls the pressure of the pressurizing unit so that the water content of the one-sided sheet and the front liner becomes the predetermined water content. Thus, the heating amount for the one-sided sheet and the front liner is collectively controlled over the entire width of the sheet, and then, the heating amounts for the heating chambers arranged in the sheet width direction are individually controlled to control the one-sided sheet and the one-sided sheet. The feature is that the amount of heat applied to the front liner is controlled according to the position in the width direction.

According to a fourth aspect of the present invention, there is provided the double facer for corrugated board sheet manufacturing apparatus according to the first or second aspect, wherein the heating plate sandwiches the traveling line of the one-sided sheet and the front liner. And the front liner side, respectively.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. (A) First Embodiment First, an outline of a corrugated board sheet manufacturing system according to the present embodiment will be described with reference to FIG. FIG. 3 is a diagram showing an outline of a corrugated board sheet manufacturing system.

The corrugated board sheet manufacturing system comprises a corrugated board sheet manufacturing apparatus 1 and a production management apparatus 2 for controlling the corrugated board sheet manufacturing apparatus 1. The corrugated board sheet manufacturing apparatus 1 has a back liner 2 as a main constituent device.
The back liner preheater 10 that heats 0, the core preheater 12 that heats the core 21, and the core 21 that is heated by the core preheater 12 are stacked and glued, and the back liner 20 that is heated by the back liner preheater 10 Single-facer 11 for laminating and single-sided sheet preheater 1 for heating single-sided sheet 22 formed by single facer 11
3, the front liner preheater 14 for heating the front liner 23,
Glue machine 15 and glue machine 15 for gluing the one-step sheet 22 heated by the one-step sheet preheater 13
A double facer 16 for forming a corrugated board sheet 24 by adhering a front liner 23 heated by a front liner preheater 14 to a one-sided sheet 22 pasted with a slitter for scoring and grooving the corrugated board sheet 24 formed by the double facer 16. The scorer 17, the cutoff 18 for cutting the corrugated cardboard sheet 24, which has been scored by the slitter scorer 17, into a divided plate shape to produce the corrugated board sheet (plate-shaped corrugated board sheet) 25, and the corrugated board sheet 25 in the order of completion. A stacker 19 for stacking is provided.

The production management device 2 is composed of the above-mentioned devices 10, 1.
As shown in FIG. 3, the control amount calculator 4 and the process controller (control means) 5 are provided to appropriately control 1, 13 to 16. The control amount calculator 4 is adapted to acquire production state information from a higher-level production management system (not shown). Then, the control amount calculation unit 4 calculates each control amount according to the production state information and the machine state (operating state) of the corrugated board sheet manufacturing apparatus 1 acquired via the process controller 5, and controls the calculation result. It is designed to be output to the process controller 5 as a command.
Further, the process controller 5 controls each control element based on a control command from the control amount calculation unit 4. In this way, the matrix control is performed by the control amount calculation unit 4 and the process controller 5 based on the production state information and the operation state information.

Further, the process controller 5 always grasps the machine state of the corrugated board sheet manufacturing apparatus 1,
The current machine state is output to the control amount calculation unit 4 periodically or in response to a request from the control amount calculation unit 4. In addition,
The machine state is, for example, each current value such as an operating speed of the corrugated board sheet manufacturing apparatus 1 (sheet traveling speed), a pressurizing force of a pressurizing unit 164, which will be described later, of the double facer 16 and a vapor pressure of the heating plate 162. .

The detailed structure of the double facer 16 according to the first embodiment of the present invention will be described below. First,
The overall structure of the double facer 16 will be described with reference to FIG. FIG. 2 is a schematic diagram showing the overall configuration of the double facer 16. First, the overall structure of the double facer 16 will be described. The double facer 16 is divided into a heating section 16A on the upstream side and a cooling section 16B on the downstream side along the traveling lines of the single-stage seat 22 and the front liner 23. Among them, in the heating section 16A, a plurality of heating plates 162 and a plurality of pressing units 164 installed above the heating plates 162 are arranged along the traveling line. The heating plate 162 is heated to a predetermined temperature by supplying steam to the inside.

A loop-shaped pressure belt 163 runs on the heating plate 162 in synchronism with the above-mentioned running line in synchronization with the one-stage seat 22 and the front liner 23.
The pressurizing unit 164 is installed in the loop 63 of the heating plate 16
Two or more are arranged so as to face 2. The pressure unit 164 includes a pressure bar 164a that is in sliding contact with the back surface of the pressure belt 163, and an air cylinder 164b that presses the pressure bar 164a toward the heating plate 162 side. Each pressurizing unit 164 includes a single-sided sheet 22 and a front liner 23.
Is configured to be pressed over the entire sheet width.

The one-stage sheet 22 glued by the glue machine 15 (see FIG. 3) is carried in between the pressure belt 163 side and the heating plate 162 from the pressure belt 163 side. On the other hand, the front liner 23 heated by the front liner preheater 14 is preheated by the liner inlet preheating roll 165, and then carried in between the pressure belt 163 and the heating plate 162 from the heating plate 162 side. Then, the one-sided sheet 22 and the front liner 23 are carried in between the pressure belt 163 and the heating plate 162, respectively, and then are transferred integrally to the cooling section 16B in a state of being vertically overlapped. . During this transfer, the one-sided sheet 22 and the front liner 23 are heated from the front liner 23 side while being pressed by the pressing unit 164 via the pressing belt 163.
The cardboard sheets 24 are attached to each other. The corrugated cardboard sheet 24 is cut at its entire width or at its end by a rotary shear 166 provided at the exit of the cooling section 16B, and the slitter scorer 17 in the next step
Be transferred to.

The heating plate 162 will be described in more detail with reference to FIGS. 1 (a) and 1 (b). FIG. 1 is a schematic diagram showing a configuration of a main part (heating plate 162) of the double facer 16, and FIG. 1A is a front view (viewed from the sheet conveying direction).
Sectional drawing, (b) is the side view. As shown in FIG. 1A, the heating plate 162 includes a plurality of (here, two) heating chambers 162a arranged in the sheet width direction. In other words, the heating plate 162 is divided into a plurality of heating chambers 162a along the sheet width direction.

A steam inlet 162b is provided on one side of each heating chamber 162a. These steam inlets 162b are connected to the steam pipe 16 shown in FIG.
2c are connected to each other, and steam for heating the seat from a steam source (not shown) is adjusted to a set pressure by a steam pressure adjusting valve 162d interposed in each steam pipe 162c,
Each heating chamber 162a is individually supplied.

At the outlet of the heating section 16A, a temperature sensor (moisture content detecting means) 162f is provided facing the front liner 23. As described above, each of the heating plates 162 arranged in the sheet flow direction is divided along the sheet width direction, that is, the plurality of heating chambers 162a are arranged in two rows along the sheet flow direction. Become. A plurality of (here, two) temperature sensors 162f are provided along the sheet width direction, and one temperature sensor 162f is provided for each of these heating chamber rows (that is, for each heating chamber row). A temperature sensor 162f is provided to detect the sheet temperature in the area heated by the heating chamber array).

The temperature information from the temperature sensor 162f (parameter information that correlates with the amount of water contained) is output to the process controller 5 of the production control device 2, and the process controller 5 uses the temperature sensor 1
Based on the detection result from 62f, the heating is arranged in the seat width direction by controlling the opening degree of the steam pressure adjusting valve 162d so that the temperatures of the one-stage seat 22 and the front liner 23 are set to the set temperature in the seat width direction. The heating amount of the chamber 162a is individually controlled.

The set temperature is appropriately set by the process controller 5, and is set according to, for example, production information. Further, as shown in FIG. 1 (a), drain pipes 162e are inserted into the steam inlets 162b, and the steam in the heating chamber 162a heats the one-stage sheet 22 and the front liner 23 to be drained. After that, the gas is discharged through these pipes 162e.

According to the double facer as the first embodiment of the present invention, since the heating plate 162 is divided into the plurality of heating chambers 162a along the sheet width direction as described above, the single-stage sheet from the heating plate 162 is divided. 22 and the front liner 23 are adjusted in the width direction according to the width direction and the one-sided sheet 2
2 and the surface liner 23 can be made uniform in temperature in the width direction, and S-shaped warpage in the width direction can be suppressed.

Further, the vapor pressure adjusting valve 162d of each heating chamber 162a arranged in the sheet width direction is automatically controlled by the process controller 5 based on the detection result of the temperature sensor 162f, so that the one-sided sheet 22 and the front liner 23 of the above-mentioned sheet 22 are covered. There is an advantage that temperature control and suppression of S-shaped warp in the width direction can be automatically performed. (B) Second Embodiment FIG. 4 is a schematic side view showing a heating section 16A ′ of a double facer as a second embodiment of the present invention. In the heating section 16A ', an air pressure adjusting valve 164d is provided in an air pipe 164c for supplying air to the air cylinder 164b of the pressurizing unit 164 as compared with the first embodiment, and the process controller 5 includes a temperature sensor. Based on the detection result of 162f, the opening degree of the air pressure adjusting valve 164d is controlled together with the steam pressure adjusting valve 162d of the heating plate 162 so that the temperatures of the one-side seat 22 and the front liner 23 become set values. By controlling the air pressure adjusting valve 164d, the one-stage seat 22
The pressure bar 164a provided over the entire width of the front liner 23 can collectively control the pressure applied to the single-sided sheet 22 and the front liner 23, and thus the heating amount, over the entire width of the sheet.

As described above, according to the double facer as the second embodiment of the present invention, the heating amount of the single-stage sheet 22 and the front liner 23 can be collectively controlled over the entire width by controlling the pressing force of the pressing unit 164. When the one-sided sheet 22 and the front liner 23 have a temperature higher or lower than the set temperature over the entire width regardless of the position in the width direction, the pressure control of the pressure unit 164 roughly controls the temperature of the entire sheet. After that, by performing individual control of the heating amount of the heating chambers 162a arranged in the sheet width direction, it is possible to perform fine control such as fine temperature control in the sheet width direction. (C) Third Embodiment FIG. 5 is a schematic cross-sectional view of a heating platen of a double facer as a third embodiment of the present invention when viewed from the front. In this heating section, a plurality of (here, two) heating chambers 16 are arranged in the sheet width direction as in the above-described embodiments.
The heating plates 162 divided into 2a are arranged vertically so as to sandwich the traveling line of the single-sided sheet 22 and the front liner 23, and the pressing unit 164 is different from the first embodiment.
Instead of, the heating plate 162 is installed. The one-sided sheet 22 and the front liner 23 travel while slidingly contacting the upper and lower heating plates 162 (in FIG. 5, the heating plate 162, the one-sided sheet 22 and the front liner 23 are shown separated from each other for convenience). . The other configuration is similar to that of the first embodiment, and thus the description thereof is omitted.

According to the double facer as the third embodiment of the present invention, the temperature unevenness in the width direction can be suppressed from the respective sides of the one-sided sheet 22 and the front liner 23 by the heating plate 162, so that the S-shaped warp can be more effectively performed. There is an advantage that it becomes possible to suppress. The double facer of the present invention is not limited to the embodiment described above, and various modifications can be made without departing from the spirit of the present invention.

For example, in the example shown in FIG. 1B, a vapor pressure adjusting valve 162d is provided for each heating chamber 162a so that the heating amount can be individually controlled for each heating chamber 162a. It suffices that the heating amount can be controlled for each position in the sheet width direction. That is, if one vapor pressure adjusting valve 162d is provided for each row (chamber row) of the heating chambers 162a arranged side by side in the sheet conveying direction, the heating amount can be controlled for each chamber row, and the heating amount in the sheet width direction can be controlled. It can be controlled.

Further, in the above embodiment, the moisture content detecting means (temperature sensor) is provided facing the front liner 23, but it may be provided facing the one-sided sheet 22. Further, instead of the temperature sensor, a moisture sensor is used as the moisture content detecting means, and the one-sided sheet 22 and the front liner 23 are used.
You may make it detect the water content of. Further, in each of the above-described embodiments, the heating amount control of the heating chamber 162a is performed based on the detection information of the temperature sensor (contained moisture content detection means). However, for example, the corrugated cardboard sheets 25 stacked on the stacker 19 are conveyed. A configuration may be adopted in which a side edge in the direction is photographed by a CCD camera, and heating amount control of each heating chamber 162a (opening degree control of the vapor pressure adjusting valve 162d) is performed based on image information of the CCD camera.
In this case, the vertical displacement amount (height position) of the corrugated board sheet 25 is detected along the width direction based on the image information of the CCD camera, and the widthwise S-shaped warp state of the corrugated board sheet 25 is detected based on this displacement amount. It

Further, in each of the above-mentioned embodiments, the vapor pressure adjusting valve 162d is controlled by the process controller (control means) 5 based on the detection information of the temperature sensor (containing water content detection means).
Although the air pressure adjusting valve 164d is automatically controlled, the operator visually monitors the warped state of the corrugated cardboard sheet 25 and adjusts the vapor pressure according to the warped state instead of installing the moisture content detecting means. The valve 162d and the air pressure adjusting valve 164d may be manually controlled.

Further, in each of the above embodiments, the heating plate 162 is used.
Is divided into two in the width direction.
2 may be divided into a plurality of pieces, and may be divided into three pieces as shown in FIG. 6, for example. Further, in each of the above-mentioned embodiments, the steam heating type is used as the heating plate (heating plate) 162, but the heating plate 162 is not limited to the steam heating type and may be, for example, a dielectric heating type or an induction heating type. good.

[0030]

As described in detail above, according to the double facer (claim 1) of the corrugated board sheet manufacturing apparatus of the present invention, the sheet width can be adjusted by individually adjusting the heating amounts of the heating chambers arranged in the sheet width direction. There is an advantage that it is possible to suppress the water content unevenness in the width direction of the one-sided sheet and the front liner by adjusting the heating amount according to the directional position, and to suppress the S-shaped warp in the width direction.

Further, a moisture content detecting means is provided, and the heating amount of the heating chamber is controlled by the controlling means so that the moisture content of the one-stage sheet and the front liner becomes a predetermined moisture content based on the detection result of the moisture content detecting means. If it is configured to be controlled individually, it is possible to automatically suppress the S-shaped warp in the width direction (claim 2). Further, the pressurizing unit for pressurizing the one-step sheet and the front liner against the hot platen is provided, and the control unit first controls the pressure unit so that the water content of the one-step sheet and the front liner becomes a predetermined water content. The heating amount for the single-sided sheet and the front liner is controlled collectively over the entire width of the sheet by controlling the pressing force, and then the heating amount for the heating chambers arranged in the sheet width direction is individually controlled to heat the single-sided sheet and the front liner. If the amount is controlled according to the position in the width direction, the temperature control of the single-sided sheet and the front liner can be efficiently performed (claim 3).

Further, by providing the heating plates respectively on the one-side sheet side and the front liner side, the temperature control of the one-side sheet and the front liner can be finely performed (claim 4).

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a main part (heating plate) of a double facer as a first embodiment of the present invention, in which (a) is a schematic cross-sectional view when viewed from the front and (b) is a schematic diagram thereof. FIG.

FIG. 2 is a schematic diagram showing an overall configuration of a double facer as a first embodiment of the present invention.

FIG. 3 is a schematic diagram showing a configuration of a corrugated board sheet manufacturing apparatus according to the first embodiment of the present invention.

FIG. 4 is a schematic side view showing a main part configuration of a double facer as a second embodiment of the present invention.

FIG. 5 is a schematic cross-sectional view from a front view showing a main part configuration of a double facer as a third embodiment of the present invention,
It is a figure corresponding to FIG.

FIG. 6 is a schematic cross-sectional view from the front, showing the configuration of the main part of a double facer as another embodiment of the present invention.

[Explanation of symbols]

1 Corrugated board sheet manufacturing equipment 2 Production control device 3 knowledge database 4 Control amount calculation unit 5 Process controller 10 Back liner preheater 11 single facers 12 Core preheater 13 Single-stage seat preheater 14 Table liner preheater 15 glue machine 16 double facers 16A heating section 16B cooling section 17 Slitter Scorer 18 cut off 19 Stacker 20 Back liner 21 Core 22 single-sided sheet 23 Table liner 24 Cardboard sheet 25 Cardboard sheet (product) 161A, 161B shower device 162 hot plate 162a heating chamber 162b Steam inlet 162c steam piping 162d Steam pressure control valve 162e drain piping 162f Temperature sensor (containing water content detection means) 163 pressure belt 164 Pressurizing unit 164a Pressure bar 164b Air cylinder 164c Air piping 164d Air pressure adjusting valve 191 Conveyor 192 Stack section

Claims (4)

[Claims] 1. A double facer for producing a double-faced corrugated board sheet by stacking a single-stage sheet and a front liner and sliding them on a heating plate to bond them together, wherein the heating plate has a plurality of heating chambers along the sheet width direction. A double facer for a corrugated board sheet manufacturing apparatus, wherein the double facer is configured so that the heating amount for the single-sided sheet and the front liner can be individually adjusted for each heating chamber. 2. A water content detecting means for detecting a water content or a parameter correlating with the water content along at least one of the one-sided sheet and the front liner along the width direction, and the water content detecting means. Based on the detection result of the one-sided sheet and the front liner so as to have a predetermined water content, the control means for individually controlling the heating amount of the heating chambers arranged in the sheet width direction. The double facer of the corrugated board sheet manufacturing apparatus according to claim 1, characterized in that 3. A pressurizing unit for pressurizing the one-sided sheet and the front liner against the hot platen, the control means based on the detection result of the water content detecting means. First, by controlling the pressing force of the pressurizing unit so that the water content of the front liner becomes the predetermined water content, the heating amount for the single-sided sheet and the front liner is collectively controlled over the entire width of the sheet. Next, the heating amount of the heating chambers arranged in the sheet width direction is individually controlled, and the heating amount for the one-stage sheet and the front liner is controlled according to the width direction position.
The double facer of the corrugated board sheet manufacturing apparatus according to claim 2. 4. The heating plate is provided on each of the one-sided sheet and the front liner side so as to sandwich the traveling line of the one-sided sheet and the front liner, respectively.
The double facer of the corrugated board sheet manufacturing apparatus according to claim 1.