JPH0447930A - Wax coating method and its apparatus - Google Patents

Abstract

PURPOSE:To always apply wax to the entire surface of core base paper even when the width dimension of the core base paper is altered by making the length dimension of solid wax in the direction crossing a base paper feed direction variable in matching relation to the width dimension of the core base paper. CONSTITUTION:When wax is applied to the base paper 16 having width dimension smaller than the max. width dimension among core base papers 16, holders 28, 28 (only one of which is shown in a drawing) are revolved around pins 34, 34 to be inclined by a required angle with respect to a base paper feed direction. When the feed of each of the core base papers 16 is started in this state, wax is applied to both entire front and back surfaces of the base sheet 16 and solid wax 30 is uniformly abraded as a whole in its longitudinal direction. When the width dimension of the base paper 16 is altered to the max. width dimension, the holders 28 are revolved around the pins 34 to be positioned so as to cross the base paper feed direction at a right angle. At this time, since the solid wax used at the last time is uniformly abraded, said wax comes into contact with the core base paper 16 over the entire length in the lateral direction thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention provides a coating method in which wax is applied to core base paper in advance in order to suppress wear and surface deterioration of the corrugating rolls used to form the required corrugation on the core base paper. and its equipment.

Conventional technology A corrugated core paper is given a corrugation with a required pitch, and the corrugated corrugated top portion and a liner are glued or bonded together to produce a single-sided corrugated board sheet.Furthermore, by laminating a back liner to this single-sided corrugated sheet, a double-sided corrugated board sheet is produced. Corrugated machines for manufacturing corrugated sheets are widely used. This corrugating machine uses a single facer as an important device to produce single-sided corrugated sheets.

As a single facer of the corrugating machine, as shown in FIG.
and the lower rolls 12 are arranged in a vertical relationship,
A pressure roll 14 is provided adjacent to this lower roll 12,
A core base paper 16 and a liner 18 are fed to these roll groups in opposite directions to produce a single-sided corrugated board sheet 2o. That is, the core base paper 16 is passed between the upper roll 1o and the lower roll 12 and pressed to form corrugated (flute) flutes, and a group pan is attached to the top of the flute of the core base paper 16 via the glued roll 22. 24, and then the liner 1 is coated with the pressure roll 14.
8 to the core base paper 16 to produce a single-sided corrugated cardboard sheet 2o.

By the way, in this type of single facer, the core base paper 16
The corrugating roll 10.12 that applies corrugations to the corrugated roll 10.1
Since the core raw paper 16 that is passed between the two is in sliding contact with each other, the waveform teeth are worn out over time, making it impossible to form a waveform with a desired pitch. In addition, especially when recycled paper is used, the paper quality deteriorates (becomes hard), and the corrugating rolls 10 and 12 wear out in a short period of time, and the plating on the surface peels off and deteriorates, resulting in beautiful waveforms on the core base paper 16. It becomes impossible to form. If the corrugating roll 10.12 becomes worn or its surface deteriorates as described above, it is necessary to replace the corrugating roll 10.12. However, during the replacement work, the operation of the single facer must be stopped, and as the corrugating roll replacement cycle becomes shorter, the operating efficiency inevitably decreases.

Therefore, a measure has been taken to apply wax as a lubricant to the front and back surfaces of the core base paper 16 in advance, thereby reducing the contact resistance between the upper and lower corrugated rolls 10.12 and the core base paper 16 and improving durability. For example, on the upstream side of the single facer in the feeding direction of the core paper, as shown in FIG. At the same time, a solid wax 30 is arranged on the side of each holder 28 facing the core raw paper 16. This solid wax 3o is set to be longer than the maximum width dimension of the core base paper 16, and is set so that wax can be applied to the entire surface of the core base paper 16. Further, the holder 28 is pressed against the solid wax 3 through an appropriate pressing means (not shown).
0 to the core base paper 16 with a predetermined pressure.

That is, 1 core base paper 1 drawn from a supply source not shown.
6 is a pair of solid waxes 30.3 arranged on the transportation route.
0 while slidingly contacting each other, and wax is applied to both the front and back surfaces. When this core paper 16 is fed between the upper and lower rolls 10.12, both rolls 10, 1
2 to form a waveform. At this time, since wax is applied to both the front and back surfaces of the core base paper 16 that come into contact with the double corrugated rolls 10 and 12, the contact resistance is reduced.

Therefore, wear and deterioration of the corrugating rolls 10 and 12 are suppressed, increasing durability and allowing longer replacement cycles.
This can improve operating efficiency.

Problems to be Solved by the Invention In the wax coating device as described above, as shown in FIG. only wear out. That is, as shown in FIG. 8(b), only the portions of the upper and lower solid waxes 30, 30 that are in contact with the core base paper 16 are unevenly worn. In this case, when the width dimension of the core base paper 16 is changed to L+α when changing the order, the unevenly worn width portion of the solid wax 30 will be removed from the core base paper 16 as shown in FIG. 8(c). No more contact. As a result, the core base paper 16 is only partially coated with wax,
It has been pointed out that the durability of the upper and lower corrugating rolls 10 and 12 cannot be improved.

Purpose of the Invention The present invention has been proposed in order to suitably solve the above-mentioned various drawbacks that exist when applying wax to core base paper. It is an object of the present invention to provide a means by which wax can always be applied to the entire surface of the core base paper even if the core base paper is changed.

Means for Solving the Problems In order to overcome the above-mentioned problems and suitably achieve the intended purpose, a wax coating method according to the present invention comprises a pair of corrugating rolls for forming corrugations on a core base paper. In a single facer for producing a single-sided corrugated board sheet by bonding a liner to a formed core base paper, there is provided a single facer on the upstream side of the single facer in the base paper feeding direction, facing close to the core base paper feeding path. A solid wax that can come into contact with the base paper is arranged, and the length dimension of the solid wax in a direction crossing the base paper feeding direction is variable according to the dimension in the width direction of the core base paper. It is characterized in that its entire length can be brought into contact with the core base paper.

Further, in order to suitably carry out the above-mentioned method, a wax coating device according to another invention of the present application is provided with a pair of corrugated rolls for forming a corrugated shape on a core base paper, and a liner is laminated to the core base paper which has been formed into a corrugated shape. a single facer for manufacturing single-sided corrugated paperboard sheets, the holder being disposed upstream of the single facer in the paper feeding direction and rotatably pivoted in proximity to the feeding path of the core paperboard, the holder; A solid wax is disposed on the side facing the core base paper and can come into contact with the core base paper, and when changing the order of the core base paper, the solid wax can be removed by rotating the holder by a required angle. The present invention is characterized in that the length of the core base paper extending in the width direction can be varied.

Further, the wax coating device includes a plurality of holders located upstream of the single facer in the paper feeding direction and movable in a direction intersecting the transportation direction in close proximity to the feeding path of the core paper. and.

A solid wax is disposed on the side of each of the holders facing the core base paper and can come into contact with the core base paper, and when changing the order of the core base paper, the plurality of holders are mutually moved in the base paper feeding direction. The length of the solid wax extending in the width direction of the core base paper may be changed by moving the solid wax in a direction intersecting with the core base paper.

Furthermore, as a wax application device, a plurality of holders are located upstream of the single facer in the paper feeding direction and are arranged to be movable toward and away from the core base paper, and the core base paper of each of the holders is arranged such that the core base paper of each of the holders is It is arranged on the facing side and consists of a solid wax that can come into contact with the core base paper.

When changing the order of the core base paper, the length of the solid wax extending in the width direction of the core base paper can be varied by bringing a number of holders corresponding to the width dimension of the core base paper close to the core base paper. It may be configured to obtain.

EXAMPLE Next, the wax application method according to the present invention will be described below with reference to the accompanying drawings, with reference to preferred examples in relation to an apparatus that can suitably carry out the method. In addition,
For the same components as described in the prior art in connection with FIGS. 7 and 8.

Indicate by the same code.

(Regarding the first embodiment) Fig. 1 shows a wax coating device 32 according to the first embodiment, in which a core paper 16 of a single facer (not shown) is placed on the upstream side in the feeding direction. A pair of holders 28, 28 are disposed oppositely at upper and lower positions sandwiching each other. This holder 28 is rotatably supported via a bin 34 disposed at the center in the feeding direction, and is configured to be rotatable in accordance with the width dimension of the core raw paper 16, as will be described later.

A solid wax 30 is disposed in the holder 28 on the side facing the core paper 16, and the solid wax 30 is brought into contact with the front or back surface of the opposing core paper 16 with a predetermined pressure to expel the wax. It is ready to be painted. The length dimensions of the solid wax 30 are shown in FIG. 1 and FIG. 2(b).
As is clear from the figure, the holder 28 is set to be slightly longer than the maximum width of the core base paper 16 when the holder 28 is perpendicular to the feeding direction. In addition, as the solid wax 30,
Emulsion based polyester resins are preferably used.

Further, the core base paper 16 is heated to a required temperature by a preheater (not shown) before being fed to the single facer. So, the above-mentioned coating device! It is recommended that the solid wax 3o be disposed downstream of the bleed heater so that the solid wax 3o can be applied smoothly by the heat of the core base paper 16.

(Operations and Effects of the First Embodiment) The core raw paper 16 is treated with, for example, a single facer by the coating device 32 according to the first embodiment.

When applying wax to a base paper 16 smaller than the maximum width dimension, as shown in FIG. 2(a), the holder 28.2
8 (only one of which is shown) is rotated about the bins 34 and 34 as a fulcrum, and tilted by a required angle with respect to the paper feeding direction. That is, the solid wax 3o disposed in the holder 28 is positioned so that the entire length in the longitudinal direction is in contact with the core base paper 16 over the entire length in the width direction.

When feeding of the core paper 16 is started in this state, wax is applied to the entire front and back surfaces of the core paper 16.

Moreover, the entire length of the solid wax 3o is in contact with the core base paper 16.

The solid wax 30 wears uniformly over its entire length.

Next, when the width dimension of the core base paper 16 is changed to the maximum width dimension due to an order change, as shown in FIG. 2(b), the holder 28 is rotated using the bin 34 as a fulcrum, 28 is positioned perpendicular to the original paper feeding direction.

At this time, the solid wax 30 that was previously used for the core base paper 16 with a small width dimension has been worn uniformly over its entire length in the longitudinal direction, so the solid wax 30 disposed in the holder 28 is It comes into contact with the base paper 16 over its entire length in the width direction. Therefore, when transportation of the core base paper 16 is started, wax is applied to the entire front and back surfaces of the core base paper 16. Further, at this time, since the solid wax 30 is in contact with the core base paper 16 over its entire length, the solid wax 3o is uniformly worn over its entire length.

That is, when changing the order of the core base paper 16.

Uneven wear of the solid wax 30 can be prevented simply by rotating the holder 28 on which the solid wax 30 is disposed about the pin 34 as a fulcrum. As a result, wax is always applied to the entire core paper 16, and the durability of the first roll 10.12 can be improved.

It is possible to lengthen the roll exchange cycle and prevent a decrease in operating efficiency.

(Regarding the Second Embodiment) FIG. 3 shows a schematic configuration of a wax application device 32 according to the second embodiment. It should be noted that the coating device 32 has members having the same configuration arranged above and below with the core base paper 16 in between, so only the members disposed on the front side of the core base paper 16 will be described.

As shown in the drawings, a plurality of (two in the embodiment) holders 28
are rotatably supported via a pin 34 which is spaced apart from each other by a predetermined distance in the direction of feeding the base paper and is arranged approximately in the center of the direction of feeding the 9M paper. The two holders 28, 28 extend in a direction away from each other from the pivot position, and when positioned perpendicularly to the paper feed direction, the free ends of the holders 28, 28 are used to feed the core paper 16 having the maximum width dimension. It is set to extend slightly from the edge along the feeding direction.

A solid wax 30 is disposed on the holder 28 on the side facing the core raw paper 16. This solid wax 3o
The length dimension is 1 of the width dimension of the core base paper 16 of the maximum width dimension.
/2 or higher.

That is, when both holders 28.28 are positioned perpendicular to the paper feeding direction, the solid wax 30.30 disposed on both holders 28.28.

It is configured so as to come into contact with the entire widthwise surface of the core base paper 16 having the maximum width dimension. Note that the ends of the double-sided wax 30.30 facing the center in the paper feed direction are set to overlap by a required length in the transport direction.

(Operation and Effect of Second Embodiment) For example, when applying wax to core paper 16 having a width smaller than the maximum width dimension, one holder 28. 34 as a fulcrum and each is rotated by a required angle with respect to the feeding direction. That is, the solid wax 30. disposed on both holders 28.28.
30 is positioned so that it abuts the entire length of the core paper 16 in the width direction. When the core base paper 16 is fed in this state, wax is applied to the entire front surface (back surface) of the core base paper 16. Further, each solid wax 30 is uniformly worn over its entire length in the longitudinal direction.

Next, when the width dimension of the core base paper 16 is changed to the maximum width dimension due to an order change, the one-carrier holder 28, 28 is positioned perpendicular to the base paper feeding direction as shown by the solid line in FIG. As a result, the two pieces of solid wax 30, 30 that have not been unevenly worn come into contact with the entire length of the core base paper 16 in the width direction, and wax can be applied to the entire front surface (back surface) of the core base paper 16. . Moreover, each solid wax 30 is
It wears uniformly over substantially the entire length in the longitudinal direction.

That is, when changing the order of the core base paper 16, the plurality of holders 28 each having the solid wax 30 arranged thereon are attached to the pins 34.
By simply rotating the solid wax 30 using the solid wax 30 as a fulcrum, uneven wear of the solid wax 30 can be prevented. As a result, wax is always applied to the entire core paper 16, which improves the durability of the corrugating rolls 10.12, lengthens the roll replacement cycle, and prevents a decrease in operating efficiency.

(Regarding Third Embodiment) FIG. 4 shows a schematic configuration of a wax application device 32 according to a third embodiment. It should be noted that the coating device 32 has members having the same configuration arranged above and below with the core base paper 16 in between, so only the members disposed on the front side of the core base paper 16 will be described.

As shown in the drawing, a screw shaft 36 is disposed above the core base paper 16 and intersects with the feeding direction, and the screw shaft 36 is connected to a motor 38.
It is configured to rotate in the forward and reverse directions via the . This threaded shaft 36 has reverse threads threaded left and right from the center in the paper feeding direction.

A nut 40 disposed on the movable holder 28 to which the solid wax 30 is mounted is screwed into one threaded portion 36a. Further, a nut 40 disposed on another movable holder 28 to which solid wax 30 is mounted is screwed into the other threaded portion 36b. That is, by rotating the screw shaft 36 in forward and reverse directions, as shown in FIGS. 4(a) and 4(b),
The pair of movable holders 28.28 have threaded portions 36a and 36b.
and the nuts 40, 40 move toward and away from each other along the screw shaft 36.

Further, as shown in FIG. 4, a fixed holder 28 that intersects with the feeding direction is positioned at a central portion in the feeding direction spaced apart from the screw shaft 36 by a predetermined distance in the paper feeding direction. This fixed holder 28 is provided with a solid wax 30 whose size is set to be approximately the same as the minimum width dimension of the core base paper 16, and the fixed holder 28 brings the solid wax 30 into contact with the core base paper 16 at a fixed position. biased in the direction. Note that the solid wax 30 of the pair of movable holders 28 and 28 disposed on the screw shaft 36
．． 30 is set to a size that allows wax to be applied to the entire widthwise surface of the core paper 16 having the maximum width dimension by adjusting the positions of the two solid waxes 30, as shown in FIG. 4(b). has been done.

(Operations and Effects of Third Embodiment) For example, when applying wax to the core base paper 16 with a width smaller than the maximum width, as shown in FIG. 4(a),
The screw shaft 36 is rotated in the forward direction by the motor 38, and the pair of movable holders 28, 28 disposed on the screw shaft 36 are moved close to each other. Then, the solid wax 30 of the fixed holder 28 disposed at the center in the paper feeding direction and the solid wax 30. Make it possible to apply. When the core base paper 16 is fed in this state, wax is applied to the entire front surface (back surface) of the core base paper 16. Further, each solid wax 30 is uniformly worn over its entire length in the longitudinal direction.

Next, when the width dimension of the core base paper 16 is changed to the maximum width dimension due to an order change, as shown in FIG. 4(b), the motor 38 is reversed to rotate the screw shaft 36 in the opposite direction. , the pair of movable holders 28°28 are moved away from each other. As a result, three pieces of solid wax that are not unevenly worn,
30, 30, 30 are in contact with the core base paper 16 over the entire length in the width direction, and wax can be applied to the entire front surface (back surface) of the core base paper 16. Furthermore, each solid wax 30 is uniformly worn over substantially its entire length in the longitudinal direction.

That is, when changing the order of the core base paper 16, by simply moving the pair of movable holders 28, 28 disposed on the screw shaft 36 toward and away from each other, the core base paper 16 can be changed without uneven wear of the solid wax 30. The whole thing can be waxed. In addition, when applying wax to the core base paper 16 of the minimum width dimension, move the movable holders 28.28 so that the solid wax 30.30 of the holders 28, 28 is
By moving the base paper 16 to a position where it does not come into contact with the base paper 16, wax can be applied to the base paper 16 using only the solid wax 30 of the fixed holder 28.

(Regarding the fourth embodiment) FIG. 5 shows a schematic configuration of a wax coating device 32 according to a fourth embodiment, in which a plurality of holders 28 are arranged in a direction intersecting the feeding direction of the core base paper 16. It is arranged. The holders 28 are arranged in a staggered manner so as not to interfere with each other. A solid wax 30 is disposed on the holder 28 on the side facing the core raw paper 16, and a piston rod 42a of a cylinder 42 is connected on the side facing away from the raw paper 16. That is, by biasing the cylinder 42 in the forward and reverse directions, the solid wax 30 can be moved toward and away from the core paper 16.

In addition, all the holders 28 arranged in a staggered manner are attached to the core base paper 16.
As shown in FIGS. 5(b) and 6, the solid wax 30 is set so as to come into contact with the core raw paper 16 having the maximum width over the entire length in the width direction without any gaps.

The number of holders 28 and the spacing between each holder 28 in the paper feeding direction can be determined by combining a plurality of holders 28 when the width of the core paper 16 changes in stages. The setting is such that wax can be applied over the entire length in the width direction of each core base paper 16 having different values.

(Function and Effect of Fourth Embodiment) For example, when applying wax to the core base paper 16 having a width smaller than the maximum width dimension, as shown in FIG.
For example, three cylinders 42 (six cylinders on the top and bottom) are urged in the forward direction, and the solid wax 30 of each holder 28 is brought into contact with the front surface (back surface) of the core raw paper 16. At this time, the three solid waxes 30 have a total length in the longitudinal direction of the core base paper 1.
6, and the solid wax 30 is in contact with the entire length of the core base paper 16 in the width direction. Also, unused holder 2
8 reversely biases the cylinder 42 to retract it to a predetermined position. When the core base paper 16 is fed in this state, wax is applied to the entire front surface (back surface) of the core base paper 16. Further, each solid wax 30 is uniformly worn over its entire length in the longitudinal direction.

Next, when the width dimension of the core base paper 16 is changed to the maximum width dimension due to an order change, as shown in FIG. The wax 30 is brought into contact with the core base paper 16. At this time, the solid wax 30 coated with wax on the core base paper 16 with the small width dimension is worn over its entire length in the longitudinal direction, so the solid wax 30 is applied over the entire length of the core base paper 16 in the width direction. The wax 30 comes into contact. Therefore, wax can be applied to the entire surface (back surface) of the core base paper 16. Moreover, each solid wax 30 is uniformly worn over substantially its entire length in the longitudinal direction.

That is, when changing the order of the core paper 16, simply by energizing the corresponding cylinder 42 and bringing the holder 28 close to the core paper 16, wax is applied to the entire core paper 16 without unevenly wearing the solid wax 30. can be applied.

Effects of the Invention As described above, according to the wax application method of the present invention, even if the width dimension of the core base paper is changed when an order is changed, the entire length of the solid wax in the longitudinal direction is used. The wax can be applied over the entire length of the core base paper in the width direction.

In other words, the solid wax does not wear unevenly when changing orders, and the wax is applied to the entire surface of the core base paper.
This can improve the durability of the corrugated roll.

[Brief explanation of drawings]

The drawings show an embodiment of a coating device that employs the wax coating method according to the present invention, and FIG. 1 is an explanatory front view showing a schematic configuration of the coating device according to the first embodiment, and FIG. (a) and (b) are explanatory plan views showing a state in which wax is applied to core base paper having different width dimensions by the coating device according to the first embodiment, and FIG. FIGS. 4(a) and 4(b) are explanatory plan views showing the schematic structure of the third embodiment, and FIGS. Figure 5 (
a) and (b) are explanatory front views showing a state in which wax is applied to a core base paper of varying width by a coating device according to the fourth embodiment, and FIG. 6 is a diagram showing the coating device according to the fourth embodiment. Fig. 7 is an explanatory view showing a single facer, and Fig. 8 (,) is a cross-sectional view showing the state in which wax is applied to core base paper with a small width dimension using a wax application device according to the prior art. FIG. 8(b) is an explanatory front view showing in cross section the state where the part of the solid wax that contacts the core base paper is worn, and FIG. 8(C) is the width of the solid wax that has been worn unevenly. FIG. 2 is an explanatory front view showing in cross section a state in which wax is applied to a large-sized core base paper. 10... Upper roll 12... Lower roll 16... Core base paper 18...
...Liner 20...Single-sided corrugated sheet 28...Holder 30...Solid wax F I G, 2 [a) F I G, 3 FIG, 2 (bl F I G, 1 28... Holder 30... Solid wax FIG5 +b1 0.4 (bl F IG, 4 ial l06 30... Solid wax 16... Core base paper 28... Holder 30... Solid wax FIG, 8 (.) FIG, 8 [bl FIG, 8 [cl

Claims (1)

[Scope of Claims] [1] A pair of corrugating rolls (10, 12) for forming a corrugation on a core base paper (16), and a liner (18) is attached to the corrugated core base paper (16). In a single facer for producing single-sided corrugated paperboard sheets (20), the base paper (16) is located on the upstream side of the single facer in the base paper feeding direction, facing close to the feeding path of the core base paper (16). )
A solid wax (30) that can come into contact with is arranged, and the length dimension of the solid wax (30) in the direction crossing the base paper feeding direction is adjusted to match the width direction dimension of the core base paper (16). A wax application method characterized in that the entire length of the solid wax (30) can be brought into contact with the core base paper (16) as being variable. [2] Equipped with a pair of corrugated rolls (10, 12) that form a corrugated shape on a core base paper (16), and a liner (18) is laminated to the corrugated core base paper (16) to form a single-sided corrugated board sheet ( 20), a holder (28) disposed on the upstream side of the single facer in the paper feeding direction and rotatably supported in proximity to the feeding path of the core paper (16); and a solid wax (30) disposed on the side of the holder (28) facing the core base paper (16) and capable of coming into contact with the core base paper (16); ) The length of the solid wax (30) extending in the width direction of the core base paper (16) can be varied by rotating the holder (28) by a required angle when changing the order of the solid wax (30). A wax application device featuring: [3] Equipped with a pair of corrugated rolls (10, 12) that form corrugations on the core base paper (16), and a liner (18) is laminated to the corrugated core base paper (16) to form a single-sided corrugated board sheet ( 20), the single facer is located upstream of the single facer in the paper feeding direction, is close to the feeding path of the core paper (16), and is movable in a direction intersecting the feeding direction. a plurality of holders (28) disposed in the holder (28); and a solid wax (30) disposed on the side of each holder (28) facing the core base paper (16) and capable of coming into contact with the core base paper (16). When changing the order of the core base paper (16), the core base paper of the solid wax (30) is moved by mutually moving the plurality of holders (28) in a direction intersecting the base paper feeding direction. (16) A wax application device characterized in that the length extending in the width direction of the wax coating device is configured to be variable. [4] Equipped with a pair of corrugated rolls (10, 12) that form corrugations on the core base paper (16), a liner (18) is laminated to the corrugated core base paper (16) to form a single-sided corrugated board sheet ( 20), a plurality of holders (28) are located on the upstream side of the single facer in the paper feeding direction and are movable toward and away from the core paper (16). and each of the holders (28)
The solid wax (30) is disposed on the side facing the core base paper (16) and can come into contact with the core base paper (16), and when changing the order of the core base paper (16), the core Base paper(
The length of the solid wax (30) extending in the width direction of the core base paper (16) can be reduced by placing the number of holders (28) corresponding to the width dimension of the core base paper (16) close to the core base paper (16). A wax application device characterized in that it is configured to be variable.