JP2771132B2 - Pressure belt for single-sided cardboard manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure belt for a single-sided cardboard manufacturing apparatus for manufacturing a single-sided corrugated cardboard using a heating type press belt device.

[0002]

2. Description of the Related Art In a single-sided corrugated cardboard manufacturing apparatus, a gluing roll of a gluing device is brought into contact with a top of a corrugated paperboard formed by an upper roll and a lower roll to apply a size liquid. One-sided cardboard is manufactured by applying a liner paper to the top of the paperboard and then solidifying the size liquid.

[0003] In order to apply the liner paper to the top of corrugated paperboard, a press roll is conventionally mainly provided. However, according to the press roll type, there are problems such as generation of vibration and noise. Recently, by adopting a press belt type provided with a belt press device instead of the press roll, these problems have been solved. We are trying to solve the point.

As the pressure belt type, for example, a configuration disclosed in Japanese Patent Application Laid-Open No. 57-100047 is provided. That is, the lower roll is provided with a gluing roll facing from one outside, and a metal belt is placed facing from the other outside, and the metal belt is hung between a pair of pulleys. The metal belt presses (presses) the liner paper against the top of the corrugated paperboard.

[0005]

According to the conventional pressure belt type described above, the metal belt 30 has a high hardness as shown in FIG. The outer periphery moves (travels) in contact with the arc. Therefore, the liner paper 33 pressed against the corrugated top 32a of the corrugated paperboard 32 also forms an arc along the arc surface of the metal belt 30, and is bonded in this state to produce a single corrugated cardboard 35.

[0006] Since the single corrugated cardboard 35 finally becomes linear, the liner paper 33 fed out along the outer peripheral length is used.
However, it becomes wavy as shown in FIG. 6 and causes a washboard. In addition, since the metal belt 30 has high hardness, a strong tension is required to adhere to the lower roll 31. As a result, a high load is applied to each step apex 32a, which causes press marks. . As described above, the use of the belt press device instead of the press roll can reduce the generation of vibration and noise, but is currently insufficient for the generation of a washboard or a press mark.

As a belt, for example, Japanese Patent Application Laid-Open
As shown in Japanese Patent No. 60877, a seamless endless canvas core is arranged in the belt longitudinal direction and width direction, and a heat-resistant elastomer layer is interposed on the surface of the canvas core to increase the elasticity in the belt longitudinal direction. A wide belt is provided which is made of laminated canvas covered with a coating layer having excellent releasability. As a result, the outer periphery thereof moves in an arc shape with respect to the tooth crest, and the tension decreases due to the elasticity.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure belt for a single-faced corrugated cardboard manufacturing apparatus which is flexible and has a high tension.

[0009]

In order to achieve the above-mentioned object, according to the present invention, the pressure belt of the single-sided corrugated cardboard manufacturing apparatus according to the first aspect of the present invention comprises a corrugated paperboard formed by upper and lower corrugated rolls. In a single-sided corrugated cardboard manufacturing device that supplies liner paper by a belt press device, the pressing belt of the belt press device is made of aramid fiber base cloth and fluororesin, and the amount of aramid fiber is 2.5 cm in the belt length direction.
50,000-90,000 denier per belt, 2.5cm in belt width direction
Aramid fiber base which is 30,000-60,000 denier per
A cloth impregnated with fluororesin, dried, and then sintered
The material is characterized in that a plurality of layers are heat-pressed .

Therefore, according to the first aspect of the present invention, the corrugated paperboard formed by the meshing of the upper roll and the lower roll is supplied with the liner paper via a pressure belt or the like, so that the corrugated paperboard and the liner paper are formed. Can be integrally moved while being sandwiched between the lower roll and the pressure belt, so that the single-sided cardboard can be produced by solidifying (gelling) the size liquid.

At this time, since the pressure belt is flexible and has high tension, when the corrugated paperboard and the liner paper are integrally moved while being sandwiched between the lower rolls, each tooth of the lower rolls is moved. The light is refracted at the top, that is, it moves (runs) while being positioned on a line parallel to the line connecting the teeth of the lower roll.

Thus, the liner paper pressed against the corrugated top of the corrugated paperboard will bend along the refraction of the pressure belt, ie one corrugation of the corrugated paperboard and the corresponding part of the liner paper in the correct triangular state. And a single-sided cardboard can be manufactured in this state. Single-sided cardboard is
Eventually, the straight line is formed. At this time, the portion of the liner paper which forms the correct triangle becomes straight, so that no washboard is generated. Also, since the pressure belt has high tension and does not elongate, it does not require strong tension to adhere to the lower roll, and as a result, a high load is not applied to each tooth crest, and the press mark Does not occur.

[0013]

Furthermore, a plurality of layers of aramid fiber base fabric impregnated with a fluororesin, dried, and then sintered are heat-pressed to form a pressure belt, which is suitable for paper thickness and the like. It is possible to provide a simple pressure belt.

According to a second aspect of the present invention, there is provided a pressure belt for a single-faced corrugated cardboard manufacturing apparatus according to the first aspect, wherein the aramid fiber base fabric is formed into a seamless endless shape. is there.

Therefore, according to the second aspect of the present invention, since the aramid fiber base fabric has a seamless endless shape, the pressure belt can be formed in a strong state without a seam. Further, the pressure belt of the single-faced corrugated cardboard manufacturing apparatus according to claim 3 of the present invention is characterized in that the surface hardness of the belt is 50 to 65 degrees (Shore D) in the above-described structure of claim 1. is there.

Therefore, according to the third aspect of the present invention, by setting the belt surface hardness to 50 to 65 degrees (Shore D), the pressure belt has a certain degree of hardness while being flexible.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 10 denotes an upper roll, and 11 denotes a lower roll.
The core base paper 1 is formed into corrugated paperboard 1A by the engagement of 10A and 11A. A gluing device 6 for applying the glue liquid 5 to the top 1a of the corrugated paperboard 1A is provided opposite to a portion where the corrugated paperboard 1A moves above one side of the lower roll 11.
The gluing device 6 includes a glue storage pad 7 for storing the size liquid 5.
, A glue roll 8, a glue roll 9, and the like.

A heating type belt press device 15 for supplying the liner paper 2 is provided below and below the lower roll 11. That is, a frame 16 having a V-shape along the outer shape of the lower roll 11 is provided, a driving roll 17 is provided on one side of the frame 16, and a steam-heating type tension roll 18 is provided on the other side. It is provided rotatably. The tension roll 18 is disposed on the frame 16 side via a tension cylinder device 19. And, over the drive roll 17 and the tension roll 18,
A pressure belt 20 that can be opposed to the lower roll 11 is hung.

A meandering correction device 22 for correcting the meandering of the pressure belt 20 is provided at a lower middle portion of the frame 16. That is, a roll 23 on which the pressure belt 20 is hung is provided on a side remote from the lower roll 11, and this roll 23
One of the roll shafts is fixed to the frame 16 side, and the other is supported by the frame 16 side via the cylinder device 24. Although the drive roll 17 is configured to be driven to synchronize with the two-stage rolls 10 and 11 by a rotary drive device, the drive roll 17, that is, the belt press device 15 may be a non-driven idle type. Good. Reference numeral 3 denotes a single-sided cardboard.

Here, as shown in FIG.
Aramid fiber base cloth 25 and fluororesin 26, the amount of aramid fiber is 50,0 per 2.5 cm in the length direction of pressure belt 20
The denier is from 00 to 90,000 denier and 30,000 to 60,000 denier per 2.5 cm in the width direction of the pressure belt 20. The pressing belt 20 is made of a seamless endless aramid fiber base fabric.
A plurality of layers (two layers in this embodiment) of a base material 27 which is impregnated with a fluororesin 26, dried, and then sintered is formed by heat-pressing. At this time, the belt surface hardness of the pressure belt 20 is
50-65 degrees (Shore D).

Although there are two types of aramid fibers, para-type and meta-type, para-type aramid fibers (polyparaphenylene isophthalamide) are preferred. And fluororesin
26, polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkylvinyl ether copolymer (PFA), and tetrafluoroethylene hexafluoropropylene copolymer (FEP) were used alone or as a mixture of two or more. Can be used.
Further, in order to improve abrasion resistance, a heat-resistant filler may be mixed into the fluororesin.

The weave of the aramid fiber base cloth 25 includes plain weave, twill weave, satin weave, and mat weave. The surface hardness of the pressure belt 20 is in the range of 50 to 65 degrees D scale because the belt surface needs to have a certain hardness when the corrugated paperboard 1A and the liner paper 2 are heated and pressed. Preferably, it is obtained by using a fluororesin.

An embodiment of the pressure belt 20 will be described below. The pressure belt 20 used here has an aramid fiber content (range) of 50,000 to 9 per 2.5 cm in the belt length direction.
0,000 denier, 30,000 ~ 6 per 2.5cm in the belt width direction
Since it is 0000 denier, it can be made flexible and high in tension. That is, when the amount of aramid fiber is larger than the above value, the belt becomes a rigid high tension belt, and when the amount is less than the above value, the belt becomes a flexible low tension belt. Can be in tension.

EXPERIMENTAL EXAMPLE 1 Aramid fiber was used in a belt length direction of 1,000 denier, 18
Pcs / 25mm, 1,000 denier in the belt width direction, 18 pcs / 25mm
Woven fabric, impregnated with a PTFE dispersion (trade name: Teflon T-30J, manufactured by DuPont-Mitsui Fluorochemicals Co., Ltd.), dried, and dried at 380 ° C.
The substrate obtained by repeating this process several times was subjected to thermocompression bonding at a temperature of 380 ° C. and a pressure of 1 MPa to obtain a flexible and high tension belt. At this time, the aramid fiber content of the belt was 54,000 denier / 25 mm in the belt length direction, 54,000 denier / 25 mm in the belt width direction, and the belt surface hardness was 55 degrees.

Experimental Example 2 Aramid fiber was 3,000 denier, 20 in the belt length direction.
Pcs / 25mm, 3,000 denier in the belt width direction, 15 pcs / 25mm
And then impregnated with a PTFE dispersion (trade name: Teflon T-30J, manufactured by DuPont-Mitsui Fluorochemicals Co., Ltd.), dried and sintered at 380 ° C. Was repeated several times to obtain a flexible and high tension belt. At this time, the amount of aramid fiber in the belt was 60,000 denier / 25 mm in the belt length direction, 45,000 denier / 25 mm in the belt width direction, and the belt surface hardness was 55 degrees.

Comparative Example Aramid fiber was 8,000 denier, 15
Book / 25mm, 4,000 denier in the belt width direction, 15 book / 25mm
And then impregnated with a PTFE dispersion (trade name: Teflon T-30J, manufactured by DuPont-Mitsui Fluorochemicals Co., Ltd.), dried and sintered at 380 ° C. Was repeated several times to obtain a rigid and high tension belt. At this time, the amount of aramid fiber in the belt was 120,000 denier / 25 mm in the belt length direction, 60,000 denier / 25 mm in the belt width direction, and the belt surface hardness was 55 degrees.

Next, the operation of the above embodiment will be described. In operation (operating), belt press equipment
In 15, the lower roll 11 is moved closer to a predetermined position by a moving device (not shown), and the tension roll is operated by the operation of the tension cylinder device 19.
By moving 18, the belt tension of the pressure belt 20 is adjusted. Further, a gluing roll 8 is attached to the step top 1a of the corrugated paperboard 1A.
The gluing device 6 is provided so that the abutment is brought into contact with the glue.

When the single-sided corrugated board manufacturing apparatus is operated in this state, first, the core base paper 1 is divided into an upper roll 10 and a lower roll.
The corrugated paperboard 1A is formed by meshing surfaces 10A, 11A with the mating surface 11. The formed corrugated paperboard 1A is a lower roll 11
, And reaches the gluing device 6, and the glue liquid 5 is applied to the top 1 a via the gluing roll 8. Then, when the corrugated paperboard 1A reaches the lower part of the lower roll 11, the liner paper 2 is supplied via the pressure belt 20 or the like so as to contact the top 1a.

The liner paper 2 is pressed against the step top 1a by the pressing force of the pressure belt 20 which is driven in synchronization with the lower roll 11, so that the corrugated paperboard 1A and the liner paper 2 are It is integrally moved while being held by the belt 20. At this time, the pressure belt 20 is heated by a steam heating type tension roll 18 or the like, and the heat passes through the liner paper 2 to solidify (gel) the glue liquid 5, thereby forming the step top 1 a and the liner paper 1. 2 are integrated. Therefore, at the place where the corrugated paperboard 1A comes off the lower roll 11, the single-faced cardboard 3 has already been manufactured.

When the pressure belt 20 meanders, it is corrected by the meandering correction device 22. This is performed by moving the other of the roll shafts of the roll 23 by the cylinder device 24 in the forward or reverse direction.

As described above, the single-sided corrugated cardboard 3 can be manufactured. The corrugated paperboard 1A and the liner paper 2 are
When integrally moved while being sandwiched between the lower roll 11 and the pressure belt 20, the pressure belt 20 has the above-described flexibility, and as shown in FIG. That is, the pressure belt 20 moves (runs) while being positioned on a line B parallel to a line A connecting between the ridges 11a of the lower roll 11. .

Accordingly, the liner paper 2 pressed against the step top 1a of the corrugated paperboard 1A is also bent along the refraction of the pressure belt 20, that is, the correspondence between one peak of the corrugated paperboard 1A and the liner paper 2. The bonded portions are bonded in a correct triangular state, and the single-faced cardboard 3 is manufactured in this state.

The single-faced corrugated cardboard 3 finally becomes straight, but at this time, the portion of the liner paper 2 which forms a correct triangle as described above becomes straight as shown in FIG. No longer occurs. Further, the pressure belt 20 has a high tension and does not elongate, and therefore does not require a strong tension to adhere to the lower roll 11,
As a result, a high load is not applied to each tooth top 11a, and no press mark is generated.

[0035]

According to the first aspect of the present invention, since the pressure belt is flexible, the pressure belt is bent at each crest of the lower roll, and therefore, is bent against the crest of the corrugated paperboard. The liner paper pressed and bent along the refraction of the pressure belt can be bonded to the corrugated paperboard, so that the single-sided corrugated cardboard that finally becomes linear can make the liner paper straight, Occurrence can be prevented. In addition, since the pressure belt has high tension and does not elongate, it does not require strong tension to adhere to the lower roll, and as a result, a high load is not applied to each tooth crest, so that the press mark Can be prevented. Furthermore, for paper thickness etc.
A suitable pressure belt can be provided.

[0036] According to claim 2 of its to the present invention described above, the pressure belt may be formed into solid state seamless.

Further, according to the third aspect of the present invention, the pressure belt can be provided with a certain degree of hardness while being flexible.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment of the present invention and is a side view of a single-sided cardboard manufacturing apparatus.

FIG. 2 is a side view of a pressure belt working unit in the single-sided cardboard manufacturing apparatus.

FIG. 3 is a side view of a single-sided cardboard manufactured by the single-sided cardboard manufacturing apparatus.

FIG. 4 is an enlarged explanatory view of a pressure belt in the single-sided cardboard manufacturing apparatus.

FIG. 5 shows a conventional example, and is a side view of a pressure belt operating portion in a single-sided cardboard manufacturing apparatus.

FIG. 6 is a side view of a single-sided cardboard manufactured by the single-sided cardboard manufacturing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core base paper 1A Corrugated paperboard 1a Corrugated top 2 Liner paper 3 Single-sided corrugated cardboard 5 Size liquid 6 Gluing device 10 Upper roll 11 Lower roll 11a Root 15 Belt press device 20 Pressure belt 25 Aramid fiber base cloth 26 Fluororesin 27 Base material

Claims (3)

(57) [Claims] 1. A single-faced corrugated paperboard manufacturing apparatus for supplying liner paper to a corrugated paperboard formed by upper and lower corrugated rolls by a belt press device, wherein a pressure belt of the belt press device is made of aramid fiber base cloth and fluororesin. ,
The amount of aramid fiber is 50,50 / 2.5cm in the belt length direction.
000-90,000 denier, 3 per 2.5 cm in belt width direction
Fluoride on aramid fiber base fabric of 0,000 to 60,000 denier
The base material impregnated with the silicone resin, dried and sintered
A pressure belt for a single-sided corrugated cardboard manufacturing apparatus, characterized in that several layers are heat- pressed. 2. Aramid fiber base fabric is seamless and endless.
The pressure bell of the single-sided corrugated cardboard manufacturing apparatus according to claim 1,
G. 3. A belt surface hardness of 50 to 65 degrees (Shore
The pressurization of the single-faced cardboard manufacturing apparatus according to claim 1, which is D).
belt.