JPH0448965A - Wax applying method - Google Patents

Abstract

PURPOSE:To apply a wax on the whole surface of corrugating medium even if the width is altered by transferring the wax melting out of a solid wax through an applying roller by heating the applying roller. CONSTITUTION:A pair of corrugating rolls 10, 12 to form a wavy form in corrugating medium are installed and a liner 18 is stuck to the corrugating medium 16 which is made wavy to give a single faced corrugated cardboard sheet 20. An applying roller 34 which is extended in parallel to the width direction of the corrugating medium 16 and contacts with the medium is installed in the upper side in the corrugating medium sending direction of a single facer in the way of freely rotating and, at the same time, a solid wax 30 put near the applying roller 34 is brought into contact with the roller 34 along the longitudinal direction of the roller 34. The wax melting out of the solid wax 30 is transferred to the corrugating medium 16 through the roller 34 by heating the applying roller 34. As a result, the width of the corrugating medium is altered at the time of receiving an order of altering the corrugating medium, the wax is always applied to the whole surface of the corrugating medium.

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. It is related to.

Conventional technology A single-sided corrugated board sheet is produced by imparting corrugations with a required pitch to a core base paper, gluing or adhering the corrugated corrugated peaks to a liner, and then laminating a back liner to this single-sided corrugated sheet. Corrugating machines that produce single-sided 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 from opposite directions, respectively, to produce a single-sided corrugated board sheet 2o. That is, the core base paper 16 is passed between the upper roll 10 and the lower roll 12 and pressed to form corrugated (flute) flutes, and a group pan 24 is attached to the top of the core base paper 16 via the glued roll 22. The adhesive 26 inside is applied, and then the liner 1 is coated with the pressure roll 14.
8 is heated and pressed onto the core base paper 16 to produce a single-sided corrugated board sheet 20.

By the way, in this type of single facer, the core base paper 16
The corrugating roll 10.12 which is to be corrugated is both rolls 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 quality of the paper 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 will no longer be possible 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 corrugating rolls 10.12 and the core base paper 16 and improving durability. It is taken. For example, as shown in FIG. 7, on the upstream side of the single facer in the feeding direction of the core paper, a pair of holders 28, 28 are disposed at upper and lower positions sandwiching the core paper 16, and intersect with the feeding direction. , a solid wax 30 is disposed on the side of each holder 28 facing the core raw paper 16. This solid wax 30 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, 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 application device as described above, when wax is applied to a core base paper 16 having a width of 2, for example, as shown in FIG. only wear out. That is, as shown in FIG. 7(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 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. 7(c). No more contact. As a result, the core base paper 16 is only partially coated with wax,
It is pointed out that the durability of the upper and lower corrugated 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 a core base paper even when 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 laminating a liner to a formed core base paper, a liner is provided on the upstream side of the single facer in the base paper feeding direction, extending parallel to the width direction of the core base paper. An application roller that comes into contact with the application roller is rotatably disposed, and solid wax placed close to the application roller is brought into contact along the longitudinal direction of the application roller, and the application roller is heated to remove the solid wax from the solid wax. It is characterized in that the melted wax is transferred to the core base paper via the roller.

Further, there is a wax coating method according to another invention of the present application.

In a single facer that is equipped with a pair of corrugating rolls that form a corrugated shape on a core base paper, and that produces a single-sided corrugated sheet by laminating a liner to the corrugated core base paper, the upstream side of the single facer in the base paper feeding direction Liquid wax is stored in a container disposed on the side, a nozzle connected to the container is extended parallel to the width direction of the core base paper, and the wax discharged from the nozzle is applied to the core base paper. It is characterized by what it did.

EXAMPLES Next, the wax coating method according to the present invention will be described below with reference to preferred examples. Note that the same members as those described in the prior art with reference to FIGS. 6 and 7 are designated by the same reference numerals.

(First Embodiment) FIG. 1 is a schematic explanatory diagram showing a first embodiment of a wax coating device that can suitably carry out the wax coating method according to the present invention. The wax application device 32 is disposed on the upstream side in the feeding direction of the core base paper 16 in a single facer (not shown), and is installed before the core base paper 16 is fed between the corrugated rolls 10.12. In addition, wax is applied to both the front and back surfaces of the base paper 16 in advance. Coating device 32
teeth.

As shown in FIG. 2, a pair of application rollers 34, 34 are rotatably provided which extend parallel to the width direction of the core base paper 16 and are vertically opposed to each other with the base paper 16 in between. The application roller 34 is heated to a predetermined temperature by an appropriate heating means (not shown), so that solid wax 30, which will be described later, can be melted and adhered to the outer peripheral surface. As the heating means, for example, a heater may be disposed inside the roller 34, or the roller 34 may be formed hollow and heated steam may be circulated inside.

A solid wax 30 detachably held by a holder 28 is disposed at a position close to the application roller 34 and not interfering with the core base paper 16.

The box 30 extends parallel to the application roller 34 and is in contact with its outer peripheral surface. Note that the holder 28 holds the solid wax 3
The solid wax 3o is biased in the direction of pressing the wax 3o against the application roller 34, and even if the solid wax 30 melts and becomes shorter in size, the wax 3o and the application roller 34 are always in contact with each other. As the solid wax 30, emulsion-based polyester resin is preferably used.

Here, the length dimension of the application roller 34 and the solid wax 30 (the length dimension extending in the width direction of the core base paper 16)
As shown in FIG. 2, is set to be longer than the maximum width dimension Lwax of the core base paper 16 processed by the single facer. Further, the application roller 34 is in contact with the core raw paper 16 substantially evenly along the width direction. Therefore, even if the width dimension of the core base paper 16 changes when the order is changed, wax can be applied to the entire core base paper 16 in the width direction. Note that it is recommended that the excess wax remaining without being transferred from the application roller 34 to the core base paper 16 is scraped off using a doctor blade or the like.

Furthermore, the core base paper 16 is heated to a required temperature by a preheater (not shown) 4) before being fed to the single facer.
32 on the downstream side of the preheater so that the wax adhering to the application roller 34 can be smoothly transferred by the heat of the core paper 16.

(Operations and Effects of First Embodiment) In the coating device 32 according to the first embodiment, first, the solid wax 30.30 is brought into contact with the coating rollers 34.34, and each coating roller 34 is heated to a predetermined temperature by appropriate means. Heat until. Then, the solid wax 30 in contact with the application roller 34 melts, and this liquid wax adheres to the outer peripheral surface of the application roller 34 in the form of a thin film. After that, the core base paper 1
When feeding of the base paper 16 starts, as shown in FIG.
The application rollers 34, 34 sandwiching the core paper 16 rotate, and the outer circumferential surface to which the liquid wax is attached comes into contact with the core raw paper 16, and the wax is transferred.

Furthermore, melted wax from the solid wax 16 adheres to the portion of the applicator roller 34 where the wax has been transferred, when the roller 34 rotates and reaches the position where the solid wax 16 is disposed. This wax is then repeatedly transferred to the front or back surface of the core base paper 16 being fed. In other words, the wax is always coated with a uniform thickness on the outer circumferential surface of the application roller 34 over its entire length in the width direction. The wax adheres in the form of a thin film, and this wax is transferred to the core raw paper 16 as the roller 34 rotates.

As shown in FIG. 2, the length dimensions of the application roller 34 and the solid wax 3o are the maximum width dimension L +
It is set to be longer than aax. Furthermore, the wax is adhered to the outer circumferential surface of the application roller 34 with a uniform thickness over the entire length in the width direction. Therefore, even if the width dimension of the core base paper 16 is changed when an order is changed, the core base paper 16 can be
It is possible to always apply wax to the entire widthwise surface of the sheet. As a result, the contact resistance between the corrugating rolls 10.12 and the core base paper 16 can be reduced, and the corrugating rolls 10.
．． By improving the durability of the roller 12, the roll replacement cycle can be lengthened, and a decrease in operating efficiency can be prevented.

(Second Embodiment) FIG. 3 is a schematic explanatory diagram showing a second embodiment of a wax coating device that can suitably carry out the wax coating method according to the present invention. Wax applicator [32].

On the upstream side in the feeding direction of the core base paper 16 in a single facer (not shown), the core base paper 16 is disposed close to the feeding path of the core base paper 16, and the core base paper 16 is connected to the double corrugated rolls 10.
．． Before being sent between 12.

As shown in FIG. 6, the wax coating device 32 according to the second embodiment is configured to apply wax to the base paper 16 in advance.
and an outer container 42 surrounding the inner container 38 and defining a required space 40 between the inner container 38 and the outer wall of the inner container 38.

A plurality of nozzles 44 are connected to the bottom surface of the internal container 38, and a plurality of nozzles 44 are arranged at a portion facing the surface of the core raw paper 16 (the surface facing upward when the m paper 16 is fed horizontally). A through hole 44a is bored therein. Also, the inner container 3
A supply pipe 46 is connected to the ceiling of 8, and the supply pipe 46 is connected to a steam supply source (not shown). That is, by supplying steam at a predetermined pressure to the internal container 38 to increase the internal pressure, the liquid wax 3 stored in the container 38 is reduced.
6 is configured to be discharged from the through hole 44a of the nozzle 44. At this time, wax is discharged approximately evenly from each through hole 44a of the nozzle 44, so that wax can be uniformly applied across the width of the core paper 16. Note that the liquid wax 3 stored in the internal container 38
6 is set so as not to drip from the through hole 44a of the nozzle 44 when steam is not being supplied to the container 38.

The nozzle 44, as shown in FIG.
6, and its length is set to be longer than the maximum width dimension L+++ax of the core base paper 16 processed by the single facer. Therefore, when changing orders, the core base paper 16 Even if the width of the core paper 16 is changed, the wax discharged through the through hole 44a of the nozzle 44 can be applied to the entire surface of the core base paper 16 in the width direction.

As shown in FIG. 3, the external container 42 is connected to a supply pipe 48 that communicates with a steam supply source (not shown). The steam supplied through the supply pipe 48 is then supplied to a space 40 defined between the outer wall of the inner container 38 and the inner wall of the outer container 42. This steam has been heated to the required temperature and serves to warm the inner container 38 and prevent the liquid wax 36 from solidifying.

Here, the wax applicator 32 according to the second embodiment has a structure in which liquid wax 36 is discharged from a nozzle 44 protruding from the bottom surface, so the back surface (directed downward) of the core base paper 16 that is fed horizontally. It is difficult to apply wax to the exposed surface. Therefore, when applying wax to the back side of the core base paper 16.

As shown in FIG. 5, the core base paper 16 is reversed via a plurality of guide rollers 50, 50 during feeding, so that the back surface of the core base paper 16 faces upward (diagonally upward in the embodiment).

In this state, by arranging the nozzle 44 of the coating device 32 so as to come into contact with the back surface of the core base paper 16 pointing upward, wax can be smoothly applied to the back surface.

(Operations and Effects of Second Embodiment) When using the wax coating device 32 according to the second embodiment, for example, as shown in FIG. .12, the feeding state is reversed via a plurality of guide rollers 50,50. In this state, the core base paper 16
The wax applicator 32 is disposed at a position where the front side faces upward and at a position where the back side faces upward.

Further, heating steam is supplied to the space 4o defined between the inner container 38 and the outer container 42 to heat the liquid wax 36 stored in the inner container 38 and prevent it from solidifying.
Next, steam at a predetermined pressure is supplied to the inner container 38 via the supply pipe 46.

The internal pressure of the container 38 increases, and the liquid wax 36 is discharged from the through hole 44a of the nozzle 44 to the outside.

The nozzle 44 is shown in FIGS. 3 and 4.

Since it is in contact with the front or back side of the core base paper 1-6,
Wax is applied to the front or back surface of the core base paper 16.

In this case, the length of the nozzle 44 is:

As shown in FIG. 4, the maximum width dimension Lax of the core base paper 16
It is set to be longer than the Moreover, the wax is uniformly discharged over the entire length of the nozzle 44 on the surface thereof that contacts the core raw paper 16. Therefore, even if the width dimension of the core base paper 16 is changed when an order is changed, the wax can always be applied to the entire surface of the core base paper 16 in the width direction without changing the dimensions of the nozzle 44.

As a result, the durability of the first rolls 10, 12 can be improved, the roll replacement cycle can be lengthened, and a decrease in operating efficiency can be prevented.

Effects of the Invention As described above, according to the wax coating method according to the present invention, even if the width dimension of the core base paper is changed when an order is changed, the wax coating method can be applied over the entire length of the core base paper in the width direction. Can be waxed. Therefore, the contact resistance between the corrugating roll and the core base paper can be reduced at all times, and the durability of the corrugating roll can be improved.

[Brief explanation of the drawing]

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 side view showing a schematic configuration of the coating device according to the first embodiment, and FIG. 3 is an explanatory front view of the coating apparatus according to the first embodiment, FIG. 3 is an explanatory vertical side view showing a schematic configuration of the coating apparatus according to the second embodiment, and FIG. 4 is an explanatory front view of the coating apparatus according to the second embodiment. Description of the Apparatus: A longitudinal sectional front view, FIG. 5 is a schematic explanatory diagram showing a configuration for applying wax to both the front and back sides of core base paper using the coating apparatus according to the second embodiment, and FIG. 6 is an explanation showing a single facer. figure,
FIG. 7(a) is an explanatory longitudinal sectional front view showing a state in which wax is applied to core base paper with a small width dimension by a wax coating device according to the prior art, and FIG. 7(b) is a core base paper in solid wax. FIG. 7(c) is an explanatory vertical front view showing a state in which the part that comes into contact with is worn, and FIG. . F I G, S 0... Upper roll 12... Lower roll 6... Core base paper 18...
・Liner 0...Single-sided corrugated sheet 0...Solid wax 34...Applying roller 6...Liquid wax 38...
・Inner container 4... Nozzle 16... Core base paper 36... Liquid wax 38... Inner container 44... Nozzle FIo, 1 FIo, 3 FIG, 2 FIG, 4 1 ↑ Hi-11

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 a single-sided corrugated board sheet (20), an application roller extends parallel to the width direction of the core base paper (16) and abuts on the upstream side of the single facer in the base paper feeding direction. (34) is rotatably disposed, and a solid wax (30) disposed close to the application roller (34) is brought into contact along the longitudinal direction of the application roller (34). By heating the solid wax (34), the wax melted from the solid wax (30) is transferred to the roller (34).
4) A wax application method characterized in that the wax is transferred to the core base paper (16) through the wax. [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 ( In the single facer for manufacturing the single facer (20), liquid wax (36) is stored in a container (38) disposed upstream of the single facer in the paper feed direction, and the liquid wax (36) is
The nozzle (44) connected to the core base paper (16)
), and the wax discharged from the nozzle (44) is applied to the core base paper (16).