JPH069899B2 - Single Phaser - Google Patents

Description

The present invention relates to a single facer which is a unit of a corrugating machine for producing corrugated board sheets.

[Conventional technology]

As shown in FIG. 6 and FIG. 7, a conventional single-facer of this type has an upper roll 1 and a lower roll 2, and a core paper 5 supplied from the upper roll 1 side is provided with an upper roll 1 and a lower roll 2. Core paper 5 that is step-formed at the meshing part with and is step-formed
At the top of the step, the glue in the container 9 is picked up by the roll 4 with glue and the glue film is adjusted by the doctor roll 8.
Liner 6 glued with 10 and supplied from pressure roll 3 side
Then, the lower roll 2 and the pressure roll 3 are adhered to each other at the pressure portion to form the single-sided ball sheet 7. As described above, in the single facer having the upper roll 1, the lower roll 2, the pressure roll 3, etc. as a basic roll configuration, when the step-formed core paper 5 is fed along the outer periphery of the lower roll 2 with rotation, it is centrifuged. Power and core paper 5 that try to pop out by force
It is necessary to suppress the so-called spring back force that tends to return the step due to the internal strain generated when the step is formed. For this reason, the lower roll 2 is intervened via the core paper 5 that is step-molded with a pressing plate conventionally called a finger plate.
However, in this method, an unfavorable phenomenon occurs in which the height of the core paper is lowered due to the sliding of the core paper 5 and the finger plate, and the sheet strength is lowered. Therefore, in recent years, a method of adsorbing and feeding the corrugated core paper to the lower roll 2 has been adopted. As shown in FIG. 6 and FIG. 7, an example of such a system is shown in which surrounding grooves 8 are formed on the peripheral surface of the lower roll 2 at appropriate intervals in the roll axial direction, while through holes 9 are formed parallel to the roll axis. A plurality of radial arrangements are provided so that the surrounding groove 8 and the through hole 9 communicate with each other, and the through hole 9 is connected to the air suction device 10 at the end face of the roll, so that the through hole 9 and the surrounding groove 8 are negatively pressed. In addition, the core paper 5 is sucked by the suction force. As described above, the lower roll 2 used in the conventional suction type single facer has a complicated shape as described above, and its manufacture is performed as follows. The lower roll 2 is processed by using the roll main body as a conventional unit, and the procedure is to open a long through hole 9 with a drill and open a surrounding groove 8 with a disc grindstone. At this time, the portion of the surrounding groove 8 of the lower roll 2 is not pressed by the engaging portion of the pressure roll 3 when the liner 6 and the core paper 5 are adhered, so that the width of the surrounding groove 8 is equal to the width of the surrounding groove 8. It is preferable that the width of the enclosing groove 8 is as narrow as possible in order to obtain the strength of the corrugated board, where a so-called dry streak which is not adhered to 7 remains, but the physical limitation of the width of the disc grindstone is unavoidable at present. The limit is about 2 mm.

Further, it is desirable to reduce the width of the surrounding groove 8 in order to reduce the dry streak, but if the entire surface in the groove depth direction is narrowed down, paper dust or foreign matter will be blocked and the negative pressure will be prevented during operation. Since it is inconvenient, it is desired to form the surrounding groove 8 so as to expand to the inner diameter side, but this is a difficult theme in terms of manufacturing technology.

Further, since the corrugated board seal 7 is manufactured by the above-described manufacturing process in the single facer, when the core paper 5 is drawn into the meshing portion of the upper roll 1 and the lower roll 2, the core paper 5 is drawn.
Scrapes the tops of the corrugated rolls 1 and 2 to wear the rolls. Since the corrugated rolls 1 and 2 that have become worn out can no longer perform normal corrugation and bonding, the entire corrugated roll will be discarded after some polishing regeneration.

[Problems to be solved by the invention]

In the conventional single facer as described above, the corrugated rolls that have been worn out and cannot be used must be discarded, which is an obstacle to promoting resource saving.

Further, the lower roll of the conventional device is difficult to obtain the strength of the corrugated cardboard sheet due to the limitation in the encircling groove width and the encircling groove structure in manufacturing, and is easily clogged with paper powder or the like and easily impairs drivability. Has the problem of.

[Means for solving problems]

In the present invention, in an upper roll for forming a core paper in stages, a lower roll, a single facer having a basic configuration such as a pressure roll, the lower roll is composed of an inner cylinder and a plurality of stepped sleeves fitted to it, This stepped sleeve is configured such that the inside thereof is wider than the outer surface portion of the surrounding groove by making it thinner on the inner diameter side.

[Work]

The lower roll consists of a cylindrical part and multiple stepped sleeves,
By forming a plurality of stepped sleeves at intervals on the outer peripheral portion of the inner cylinder so as to form a circumferential groove in the roll circumferential direction, there is a manufacturing constraint that the circumferential groove is formed like a conventional integral roll. Since it is possible to form the surrounding groove having a narrow width, the width of the dry streak remaining on the single-sided corrugated board sheet can be reduced and the strength of the corrugated board can be improved.

At this time, the stepped sleeve is configured to be thin on the inner diameter side, or a pocket is formed on the inner diameter side to form a room wider than the outer surface portion of the surrounding groove, so that the surrounding groove is filled with paper powder or the like. No clogging will occur.

Further, if the non-adhesive substance such as Teflon is coated on the outer peripheral surface area of the inner cylinder and / or the axial groove formed on the inner peripheral surface of the stepped sleeve, the adhesion of paper powder, glue, etc. is prevented. .

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

In this embodiment, as shown in a front view including a partial cross section in FIG. 1, an upper cylinder 1 is provided with an inner cylinder 1 ″ having shaft portions on both side surfaces and a step fitting fitted to the inner cylinder 1 ″. A cylindrical roll 2'consisting of an outer cylinder 1 ', and a lower roll having a shaft portion 11 on both side surfaces thereof, and a roll circumferential enclosing groove 8 formed on the outer peripheral portion of the inner cylinder 2', with a space therebetween. It is composed of a plurality of stepped sleeves 12 joined together. On the outer peripheral surface of the inner cylinder 2 ″, several grooves 13 continuously formed in the axial direction of the roll are radially arranged. At the end surface of the roll, these grooves 13 are sealed to the air suction device 14 by a seal member. 2 is shown in perspective view of the lower roll 2.

The upper roll 1, the lower roll 2, and the pressure roll 3 are rotatably attached to bearings fixed to the frame, and the upper roll 1, the lower roll 2, and the pressure roll 3 are attached.
One or both ends of all or some of the rolls are connected to the driving device 15. Furthermore, the upper roll 1, the lower roll 2,
Heating steam is supplied to the hollow inside of the pressure roll 3 by a steam supply device 16, respectively.

Next, various structures have been proposed for the stepped sleeve 12 and the inner cylinder 2 ″, and these embodiments are shown in FIGS.

Figure 3 (1), were refer to stepped sleeve 12 _B is gradually thinner on the inner diameter side, thereby encircling groove 8 _B is an example and summer therein large room than the outer surface portion.

FIG. 3 (2), the third sleeve 12 _C stepped in the depth direction i.e. the inner diameter side on the formation of the minute flat portion at the outer diameter
This is an example in which the thickness is gradually reduced as in the case of FIG.

Figure 3 (3) is provided with a notch in the sleeve 12 _D stepped, an example in which to form the pocket to enclose the grooves 8 _D.

When structured as FIG. 3 (1) to (3), surrounding groove 8 _B, 8 _C,
8 _D can narrower at the inlet portion, can significantly increase the strength of the corrugated board since it narrows the width of the dry streak of the single-faced corrugated fiberboard sheet 7. Further, FIG. 3 (1) to (3) encircling groove 8 _B,
Since the interior of the 8 _C and 8 _D is wider than the outer surface, clogging of paper dust, etc. can be prevented, and operability or maintainability is not impaired.

Next, FIGS. 4 and 5 show the structure of the groove in a sectional view of the lower roll 2. 4 (1), the outer peripheral surface of the inner cylinder 2 _"a, the groove 13 _A which is formed continuously in the roll axial direction showing an example of disposed radially semicircular sectional shape. FIG. 4 ( the 2) are to display the square groove 13 _B to represent that various cross-sectional structure taken in square etc. manufacture easy way as a groove. Incidentally, it stepped sleeve which is fitted to the inner cylinder 2 "a Various structures such as 12 _A or 12 _{B to} 12 _D can be applied. Fig. 4 (3)
Shows an example in which coated Teflon or the like non-adhesive material 13 _'A into the groove 13 _A. This coating is the inner cylinder 2 "with a and stepped sleeve 12 _A or the like has come can manufacture because they are divided.

Figure 5 is the inner cylinder 2 "without providing a groove on the outer periphery of an example is provided radially grooves 13 _C in the inner peripheral surface of the stepped sleeve 12 _E. Also, is not shown but the inner cylinder 2" Outer and stepped sleeves
It may be provided a groove in the inner periphery both 12 _E.

Now, in the single facer having the above-mentioned structure, the core paper 5 has the steps of the upper roll 1 and the lower roll 2, that is, the stepped outer cylinder 1'of the upper roll 1 and the stepped outer cylinder 2'of the lower roll 2.
Alternatively, the stepped sleeve 12 is step-formed by the step engagement, and the negative pressure generated in the surrounding groove 8 from the air suction device 14 through the through hole 9 or the groove 13 is applied to the outer circumference of the lower roll 2. The liner 6, which is glued to the top of the step of the core paper 5 by the gluing roll 4 while being held by the centrifugal force and the suction force that overcomes the internal strain of the core paper 5 generated during the step forming, is supplied from the pressure roll 3 side, and the lower step. The pressure applied parts of the roll 2 and the pressure roll 3 adhere to each other to continuously manufacture the single-faced cardboard sheet 7. At this time, if the structure of the stepped sleeve is made to have a small outer diameter portion and a wide surrounding groove in the inner diameter portion, the tri-streak width of the corrugated board sheet can be reduced and the strength of the corrugated board is improved, and Does not clog powder. Further, even if the step portion of the lower roll 2 is worn out and cannot be used, it is not necessary to dispose of the entire step roll as in the conventional device, and the old inner cylinder 2 ″ is peeled off to make a new stepped outer cylinder. If 2'is fitted again, it can be regenerated, resources can be reused, and cost can be reduced.

〔The invention's effect〕

According to the single facer of the present invention described in detail above, resource saving of the corrugated roll can be achieved, cost merit is generated, and dry streak can be reduced without impairing drivability due to clogging of paper dust and the like. It can be expected to have effects such as improving the strength of corrugated board.

[Brief description of drawings]

FIG. 1 is a front view including a partial cross section of a single facer showing an embodiment of the present invention, FIG. 2 is a partial perspective external view of a lower roll of FIG. 1, and FIG. 3 (1), (2), (3) is a partial sectional view of the lower roll, FIGS. 4 (1), (2), (3) and FIG. 5 are sectional views of the lower roll, and FIGS. 6 and 7 show a conventional single facer. It is the front view and side sectional view which show. 1: Upper roll 2: Lower roll 3: Pressure roll 1 ': Upper roll stepped outer cylinder 1 ": Upper roll inner cylinder 2': Lower roll stepped outer cylinder 2": Lower roll inner cylinder 12: Stepped sleeve 13: Groove 8: Enclosed groove

Claims (1)

[Claims] 1. An upper roll for step-forming core paper and a lower roll, a gluing device for gluing onto the top of the stepped core paper, and a liner attached to the glued core paper in contact with the lower roll. In a single facer equipped with a pressure roll to be a single-sided corrugated cardboard sheet, the lower roll is formed with an inner cylinder having shaft portions on both side surfaces and a roll circumferential groove on the outer peripheral portion of the inner cylinder. A plurality of stepped sleeves each having a shorter axial length on the inner side and shorter than the outer side, which are fitted to each other at intervals, and are continuously arranged in the roll axial direction between the inner cylinder and the sleeve. A single facer in which several formed grooves are radially arranged, and the grooves are connected to an air suction device at a roll end surface.