BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to a sleeve, which
is a cylindrical structure formed like a paper pipe,
for externally mounting on a press roll, especially
a press roll of a corrugator, and also relates to a
press roll mounted with said sleeve.
Description of the Conventional Art
When a corrugated cardboard is manufactured by
using the corrugator, which is a corrugated cardboard
manufacturing device, the method used is such that a
corrugating medium is fed to a pair of corrugation
rolls meshing each other to carry out a corrugation
process, the ridge of the corrugated medium is pasted,
a liner fed from the another side is contacted with
the pasted corrugated medium, said corrugated medium
and liner are passed between the corrugation roll and
the press roll, and said corrugated medium is thus
bonded with the liner (refer to Figure 8 described
below).
In many cases, a pair of corrugation rolls are
arranged perpendicularly or slantingly up and low, and
there are two arrangements of the press roll, i.e.,
at the side of the upper corrugation roll or the lower
corrugation roll. In addition, two press rolls are
arranged occasionally at the feeding paper side and
the discharging paper side.
Both of the corrugation roll and press roll of
the corrugator are made with a metal and it is available
that the diameters of the corrugation roll and the
press roll are about same or different.
The corrugation roll and the press roll are
arranged oppositely with a small space being kept. At
this time, an idea for adjusting the space between the
corrugation roll and the press roll has been proposed.
That is, in the Japanese Patent Laid-Open No. 207294
- 1997 (Patent document 1), the technique for
enhancing the simplification and efficiency of the
work by setting each space between the corrugation roll
and the press roll according to the combination of the
corrugating medium and the liner, is described. In the
Japanese Patent Laid-Open No. 52824 - 1996 (Patent
document 2), the technique similar to the patent
document 1 is described.
The corrugation roll and press roll of the
corrugator has been used under very severe conditions,
i.e., at the high temperature, high rotational speed
and large vibration.
Therefore, since the corrugation roll and press
roll of the corrugator are made with the metal, it is
impossible to prevent that a considerable vibration
and noise are generated by collision or shock of metals,
which is caused from the vibration and high rotational
speed at the time of being driven although the
corrugated medium and the liner are interposed between
the rolls. Furthermore, a pressed stripe, which is
called to as a press mark, is marked easily on the liner
surface of the corrugated cardboard. Moreover, both
of the corrugation roll and the press roll are damaged
easily, and especially, the damage of the corrugation
roll side is restored hardly, so that the life of the
corrugation roll at the side contacting with the press
roll is limited naturally.
As described in the patent documents 1 and 2, the
technique for adjusting the space between the
corrugation roll and the press roll aimed to solve
these problems, but it is hard to avoid the
complication of the device and a control mechanism.
As for another problem at the time of producing
the corrugated cardboard by the corrugator, since the
bonding of the corrugated medium with the liner is
carried out by linear contact, the time of pressing
them is very short. So, in order to bond the corrugating
medium with the liner certainly, there is a restriction
to increase the speed for producing the corrugated
cardboard to more than a certain limit. Therefore, the
technique for solving such restriction and increasing
productivity is required strongly.
If a simple means to solve these problems at once
can be found out from the different viewpoint from the
conventional method, it becomes very useful.
The present invention has the object to provide
the sleeve for the press roll capable of preventing
the damage to the corrugation roll and the press roll
by externally mounting the sleeve having the specific
structure on the press roll for the corrugator and
protecting the surface of said press roll. The sleeve
is also capable of reducing the noise and the vibration
remarkably, preventing the press mark on the liner
surface of the corrugated cardboard, not generating
trouble in the production of the corrugated cardboard
since the sleeve can be demounted and mounted easily
even when said sleeve is damaged, and increasing the
speed for producing the corrugated cardboard to more
than the conventional speed limit. In addition the
present invention also has the object to provide the
press roll mounted with said sleeve.
Summary of the Invention
The sleeve for the press roll of the present
invention is a cylindrical sleeve (1) to be used by
externally mounting on a press roll (2), and is
characterized in that the cylindrical sleeve (1)
comprises a cylindrical main layer (11) composed with
a composite material, where a fiber reinforcing
material is bound with a matrix resin. In this case,
it is available that the first cover layer (12) is
formed on an outer peripheral surface of the main layer
(11), the second cover layer (13) is formed on an inner
circumference surface of the main layer (11), and a
cushion layer (14) (or the third cover layer (15) and
the cushion layer (14)) is formed between the main
layer (11) and the second cover layer (13).
The press roll mounted with the sleeve of the
present invention has the characteristics that the
cylindrical sleeve (1) to be used by externally
mounting on the press roll (2) is externally mounted
in a non-fixed state on the press roll (2), and that
said cylindrical sleeve (1) comprises the cylindrical
main layer (11) composed with the composite material,
where a fiber reinforcing material is bound with a
matrix resin.
In the present invention, said cylindrical sleeve
(1) having the specific structure is externally
mounted in a non-fixed state on the press roll (2).
Therefore, when the press roll mounted with the
sleeve of the present invention is used in a hard
condition, such as the corrugator, it is possible to
prevent the damage to the corrugation roll and the
press roll, reduce the noise and the vibration
remarkably, and prevent the press mark on the liner
surface of the corrugated cardboard.
When the sleeve is damaged, the production of the
corrugated cardboard is not disturbed since the sleeve
can be demounted and mounted easily.
When the cushion layer (14) is formed, since the
pressing time for bonding the corrugated medium with
the liner becomes long, the enough bonding can be
realized even when the rotational speed of the
corrugation roll and the press roll is high. Therefore,
the production speed of the corrugated cardboard can
be increased as compared with that of the conventional
process, so that the productivity can be increased.
BRIEF EXPLANATION OF THE DRAWINGS
Figure 1 is a typical perspective view showing
an example of the skeleton with the fiber reinforcing
material in the main layer (11) of the cylindrical
sleeve (1).
Figure 2 is a typical cross sectional view in the
circumferential direction, showing the skeleton with
the fiber reinforcing material in Figure 1 in the case
of the monolayer.
Figure 3 is a typical cross sectional view in the
circumferential direction, showing an example of the
cylindrical sleeve (1).
Figure 4 is a typical cross sectional view in the
circumferential direction, showing an example of the
cylindrical sleeve (1).
Figure 5 is a typical cross sectional view in the
circumferential direction, showing an example of the
cylindrical sleeve (1).
Figure 6 is a typical cross sectional view in the
circumferential direction, showing an example of the
cylindrical sleeve (1).
Figure 7 is a typical cross sectional view in the
circumferential direction, showing an example of the
cylindrical sleeve (1).
Figure 8 is a typical view showing an example of
the corrugator for manufacturing the corrugated
cardboard.
Figure 9 is a front view of the press roll (2)
externally mounted with the sleeve (1).
Figure 10 is a cross sectional view showing an
other example of the press roll (2) externally mounted
with the sleeve (1).
Figure 11 is a cross sectional view showing an
other example of the press roll (2) externally mounted
with the sleeve (1).
Figure 12 is a cross sectional view showing an
other example of the press roll (2) externally mounted
with the sleeve (1).
Figure 13 is a cross sectional view showing
further another example of the press roll (2)
externally mounted with the sleeve (1).
Explanation of codes
(1) is a sleeve,
(11) is a main layer,
(12) is the first cover layer,
(13) is the second cover layer,
(14) is a cushion layer,
(15) is the third cover layer,
(2) is a press roll,
(2a) is a flange,
(2b) is a slit groove,
(3) is a corrugation roll,
(4) is a pasting device,
(5) is a finger,
(6) is a guide roll,
(7) is an auxiliary roll,
(M) is a corrugating medium,
(L) is a liner, and
(P) is a contacted point of the press roll (2)
with the corrugation roll (3).
DETAILED DESCRIPTION OF PREFERRED EMBODIMENT
Hereinafter, the present invention will be
explained more concretely.
<Sleeve for Press Roll>
(The layer composition of the sleeve (1))
The sleeve for the press roll of the present
invention is the cylindrical sleeve (1) to be used by
externally mounting on the press roll (2) made with
the metal.
Said cylindrical sleeve (1) comprises the main
layer (11) composed with the composite material, where
the fiber reinforcing material is bound with the matrix
resin.
It is preferable that the first cover layer (12)
is formed on the outer periphery surface of the
cylindrical main layer (11). It is also preferable that
the second cover layer (13) is formed at the side of
the inner surface of the cylindrical main layer (11).
Moreover, it is preferable that the cushion layer
(14) is formed between the main layer (11) and the
second cover layer (13), or the third cover layer (15)
and the cushion layer (14) are formed between the main
layer (11) and the second cover layer (13) in this
order.
That is, the cylindrical sleeve (1) can comprise
as follows.
1.The main layer (11). 2.The first cover layer (12) / the main layer (11). 3.The first cover layer (12) / the main layer (11) /
the second cover layer (13). 4.The first cover layer (12) / the main layer (11) /
the cushion layer (14) / the second cover layer (13). 5.The first cover layer (12) / the main layer (11) /
the third cover layer (15) / the cushion layer (14)
/ the second cover layer (13). 6. The main layer (11) / the second cover layer (13). 7.The main layer (11) / the cushion layer (14) / the
second cover layer. 8.The main layer(11) / the third cover layer (15) /
the cushion layer (14) / the second cover layer (13).
In addition, if the meaning of the present invention
may not be lost, there are no problems that the other
layer is added further if necessary.
(Main layer (11))
The main layer (11) has the cylindrical form, and
comprises the composite material, where the fiber
reinforcing material is bound with the matrix resin.
As the matrix resin, a thermosetting resin or a
curable resin, such as an epoxy resin, an unsaturated
polyester resin, a vinyl ester resin, a polyimide resin,
a phenol resin, a melamine resin, an urea resin, a furan
resin, a silicon-base resin, a polyurethane resin, a
bismaleimide resin or an oxazoleine resin, can be used.
Especially, the epoxy resin is important, and the
unsaturated polyester resin is also important.
As the matrix resin other than the above resins,
various thermoplastic resins, such as a fluororesin,
a polyamide resin, a polycarbonate resin, a
polypropylene resins, a polyethylene resins, a
polyacetal resins, a polystyrene resins, an ABS resin,
a methacrylic resin, polybutylene terephthalate
resins, a polyphenylene ether resins resins, a
polyphenylene sulfide resins, a polysulfone resins,
a polyether-ether ketone resins, can be used.
As the fiber reinforcing material, an inorganic,
carbonaceous or organic fiber, such as a carbon fiber,
a boron fiber, an alumina fiber, a silica fiber, a
silicon carbide fiber, a glass fiber, a metal fiber,
a poly-paraphenylene-benzobisoxazole fiber, an
aramid fiber, a polybenzimidazole fiber, a
polyether-ether ketone fiber, a polyamideimide fiber,
a polyimide fiber, a liquid crystal polyester fiber,
a fluororesin fiber, an ultra-high molecular weight
polyethylene fiber, a polyolefin fiber, a polyester
fiber, a polyamide fiber, an acrylic fiber or a vinylon
fiber, can be used. Various whiskers can be also used.
It is preferable that the fiber reinforcing materials
is selected from the materials having the required
strength and heat resistance, for example, more than
180 degree C, preferably more than 200 degree C.
In the case that the sleeve (1) is externally
mounted on the press roll of the corrugator, it is
desirable that at least a part of the fiber reinforcing
materials in the main layer (11) comprises the material
having high heat conductivity, such as the carbon fiber
or the metal fiber, especially, a copper wire.
It is preferable that the fiber reinforcing
material is subjected to the surface treatment, such
as a borane treatment, a silane treatment, an amino
silane treatment, an ozone treatment, an oxygen
oxidation treatment, a plasma treatment or an
ultraviolet treatment, in accordance with the kind of
the fiber reinforcing material.
It is especially preferable that said fiber
reinforcing material is a roving made with a
monofilament yarn or a multi-filament yarn, which are
made with long fibers, a continuous strand mat, a
roving cloth, a yarn, a mat, a blind-like roving or
the like. The materials, where the suitable number of
these yarns is made into a cord by paralleling or
twisting and further reparalleling or retwisting, or
made into a braid using these cords, can be used
preferably. Moreover, a spun yarn, a woolen yarn, a
covered yarn, where the other yarn or a slit yarn is
helically wound on the periphery of a core yarn, a film
split yarn, split resin yarn or the like, can be also
used.
It is available that the fiber reinforcing
material in the cylindrical main layer (11) has one
layer (mono-layer) or a multi-layer (more than two
layers). It is available that the fiber reinforcing
material in each layer is formed in the cylindrical
form being seamless, i.e., there is no seam, by a
hollow-weave method or a circular-knitting method, or
is formed finally in the cylindrical shape by winding
the fiber reinforcing material having the linear or
sheet shape.
As for each layer, it is preferable that the fiber
reinforcing material is the material, where a main
skeleton is made by line running in the length
direction of the cylinder, i.e., for example, the main
line runs and is arranged in the state like as a blind
in the length direction of the cylinder, or the
material, where the main skeleton is made by line
running in a circumferential direction of the cylinder,
i.e., for example, the main linear is helically wound
and arranged in the circumferential direction of the
cylinder. A sub line runs and is arranged in the other
directions, i.e., a orthogonal direction, a inclined
direction, or random directions, to the main line.
Furthermore, it is available that the main line runs
in an inclined direction of the cylinder.
When the fiber reinforcing material is formed in
each of the multi-layer, it is preferable that the
running direction of the main line is changed in each
layer.
As the method for forming the cylindrical main
layer (11), the following methods can be used. One
method is that the matrix resin is impregnated or
infiltrated after the cylinder having been formed with
the fiber reinforcing material. Another method is that
the cylinder is formed while coating, impregnating or
infiltrating the matrix resin to the fiber reinforcing
material. In this case, a surface resin can be coated
beforehand on a mold for forming the cylinder.
In addition, the following various forming
methods being applicable for forming the fiber
reinforcing resin can be also used as additional
methods. That is, the method comprising, impregnating
and laminating the fiber reinforcing material with the
matrix resin or using a prepreg on the mold, covering
the fiber reinforcing material with a film,
decompressing the laminated surface to fit the film,
and pressurizing the laminated surface to defoam, the
method comprising, impregnating and laminating the
fiber reinforcing material with the matrix resin or
using a prepreg on the mold, covering the mold with
a bag, pressurizing and heating the whole including
the mold in a steam autoclave, the method comprising,
setting the fiber reinforcing material in the mold,
casting the matrix resin in the mold, and closing the
mold to solidify, the method comprising, putting the
fiber reinforcing material on the mold, and sucking
up or injecting the matrix resin, the method comprising,
forming the cylinder by using the prepreg consisting
of the fiber reinforcing material impregnated with
the matrix resin, or the method comprising, forming
the cylinder by spraying the chopped fiber reinforcing
material, in which an electrostatic coating can be
applied.
(First cover layer (12))
The first cover layer (12) is the layer formed
on the outer peripheral surface of the cylindrical main
layer (11). It is preferable that the first cover layer
(12) also comprises the composite material, where the
fiber reinforcing material is bound with the matrix
resin. At this time, as the matrix resin and the fiber
reinforcing material, the same materials described in
the explanation of the main layer (11) can be used.
It is desirable that at least a part of the fiber
reinforcing material is selected from the material
having the required heat resistance with the required
strength.
It is preferable that the fiber reinforcing
material composing the first cover layer (12) has a
entangled line body, such as a nonwoven fabric, a woven
fabric or a knitted fabric, in many cases.
The first cover layer (12) composes an outermost
layer of the sleeve (1), and preserves the main layer
(11). So, said first cover layer (12) is designed in
many cases so as to have some effective properties,
such as frictional resistance, lubricating properties,
heat resistance, surface smoothness, prevention of
paste adhesion or the like, by selecting the material
or polishing the outer peripheral surface.
(Second cover layer (13))
The second cover layer (13) is the layer formed
on the inner circumference surface of the cylindrical
main layer (11). It is preferable that the fiber
reinforcing material composing the second cover layer
(13) has a entangled line body, such as the linear
fabric, the nonwoven fabric, the woven fabric or the
knitted fabric, in many cases. The second cover layer
(13) is positioned at the innermost of the sleeve (1),
and preserves the main layer (11), so that the
requirement for strength is not so severe.
It is preferable that said second cover layer (13)
also comprises the composite material, where the fiber
reinforcing material is bound with the matrix resin.
At this time, as the matrix resin and the fiber
reinforcing material, the same materials described in
the explanation of the main layer (11) can be used.
It is desirable that at least a part of the fiber
reinforcing material comprises the material having the
required heat resistance with the required strength.
The second cover layer (13) composes an innermost
layer of the sleeve (1) and is contacted with the
surface of the press roll (2). The sleeve (1) is
externally mounted in the non-fixed state on the press
roll (2), so that it is desirable that the second cover
layer (13) is formed so as to have good slidableness.
Therefore, it is desirable that the second cover layer
(13) formed with the entangled line body is formed to
have good slidableness, for example, by comprising the
composite material, where the fiber reinforcing
material is bound with the matrix resin blended with
fluorine resin particles.
(Cushion layer (14))
The cushion layer (14) is formed between the
cylindrical main layer (11) and the second cover layer
(13) if necessary.
As the cushion layer (14), for example, a sheet
layer, such as a rubber elastomer having heat
resistance or a foam layer having heat resistance, can
be used.
(Third cover layer (15))
The third cover layer (15) is formed between the
main layer (11) and the cushion layer (14) if necessary,
when the cushion layer (14) is formed between the
cylindrical main layer (11) and the second cover layer
(13) as described above.
It is preferable that the third cover layer (15)
also comprises the composite material, where the fiber
reinforcing material is bound with the matrix resin.
At this time, as the matrix resin and the fiber
reinforcing material, the same materials described in
the explanation of the main layer (11) can be used.
It is desirable that at least a part of the fiber
reinforcing material comprises the material having the
required heat resistance with the required strength.
(Main layer (11), First cover layer (12), Second cover
layer (13), Third cover layer (15))
It is available that the main layer (11), the
first cover layer (12), the second cover layer (13)
and the third cover layer (15) are formed respectively,
to form the cylindrical sleeve (1) comprising various
layers described above. However, when these layers are
formed one by one, it becomes that the whole is regarded
as the main layer (11) since the distinction of each
layer becomes not certainly. But, in the present
invention, there are no problems in such a case, and
rather, said case is more desirable.
(Surface hardness and stiffness of sleeve (1))
It is preferable that at least the surface of the
outermost layer of each layer composing the sleeve (1)
has more than a certain hardness which is, for example,
more than 70 degrees, preferably about 70 to 85 degrees.
Moreover, it is also preferable that whole of the
sleeve (1) is composed as stiff as possible.
(Sleeve mounting press roll)
As for the sleeve mounted press roll of the
present invention, the sleeve (1) for the press roll
is externally mounted in the non-fixed state on the
press roll (2). The reason why said sleeve (1) is
externally mounted in the non-fixed state is that the
sleeve (1) can be mounted and demounted easily to the
press roll (2).
As the press roll (2), various press rolls can
be used. For example, the press roll for feeding the
paper, sheet, web or the like, which are wound in a
roll state, without generating looseness, or the press
roll for a cutting device slitting said paper, sheet,
web or the like continuously while feeding them, is
used. However, the case of the press roll of the
corrugator, which is the device for manufacturing the
corrugated cardboard, is especially important.
It is preferable that a regulating means (2a) for
regulating the move in an axial direction of the sleeve
(1) externally mounted thereon is provided at the press
roll (2). An example of the regulating means (2a) is
a flange.
The press roll (2) is made with the metal in
general. However, in the present invention, the roll
having elasticity also can be used as the press roll
(2). An example of such roll is a press roll made with
fluororubber having heat resistance. When the roll
having elasticity is used as the press roll (2), and
the above described sleeve (1) having high surface
hardness of the outermost layer is externally mounted
on said roll, it is possible to paste the corrugated
medium with the liner certainly at high speed without
biting of the corrugation roll into the press roll (2) ,
and prevent the generation of the noise effectively.
The press roll (2) is a fixed or rotational roll
and it is available that a fluid such as air can be
fed into the space between said press roll (2) and the
sleeve (1) externally mounted on it. At this time, the
sleeve (1) can be rotated freely to the press roll (2)
through the fluid.
In this way, in the case that the press roll (2)
is a fixed or rotational roll and the fluid can be fed
into the space between said press roll (2) and the
sleeve (1) externally mounted on said press roll (2),
when said press roll (2) is used as the press roll
pressing toward the corrugation roll (3) of the
corrugator, the following trouble is generated
occasionally. That is, the fluid fed into the space
between the press roll (2) and the sleeve (1)
externally mounted on it, is escaped from the pressed
position by the pressure at the contacted position (P) ,
so that the cushion effect by the fluid cannot be
obtained sufficiently.
Therefore, in the case that such trouble may be
generated, it is preferable that the auxiliary rolls
(7) and (7) are provided at the outer peripheral side
of the press roll (2) and the both sides of the
contacted position (P), where the press roll (2) is
contacted with the corrugation roll (3). These
auxiliary rolls can suppress the fluid fed into the
space between said press roll (2) and the sleeve (1)
to escape from the pressed position by the pressure
in the contacted position (P).
Example
Next, the present invention will be explained
concretely with examples.
Example 1
Figure 1 is a typical perspective view showing
an example of the skeleton with the fiber reinforcing
material in the main layer (11) of the cylindrical
sleeve (1). In Figure 1, the sleeve (1) has the
composition that the fiber reinforcing material is
woven like a blind to make the running direction of
the fiber into the cylinder length direction. For
making the main line run in the cylinder length
direction, a blind weaving method, a hollow-weaving
method, a reeling weaving method or the like, which
uses the main line as a warp yarn and the sub line as
a weft yarn, can be used as a weaving method. In
addition, it is preferable that a knitted fabric is
used other than a woven fabric. For example, when the
knitted fabric is used by a circular knitting method,
it is possible to obtain the cylindrical skeleton
extending and contracting in the diameter direction
and the length direction.
Figure 2 is a typical cross sectional view of the
circumferential direction of the skeleton with the
fiber reinforcing material, and shows the case of the
monolayer. In Figure 2, a black circle, a white circle
and a circle added with scattered dots show different
kinds of the fiber reinforcing material. They are, for
example, fibrous materials, which is the linear
material, the paralleled material, the twisted
material, the retwisted material or the like, selected
from the carbon fiber, the
polyparaphenylenebenzobisoxazole fiber, the aramid
fiber, the copper wire or the like. It is preferable
that at least a part of the fiber reinforcing material
comprises the material having high heat conductivity
(shown as the black circle), such as the copper wire,
carbon fiber or the like. Moreover, it is also
preferable that at least a part of the fibrous material
comprises the twisted material or the retwisted
material (shown as the circle added with scattered
dots), which are combined with the fibrous material
having high heat conductivity.
From Figure 3 to Figure 7 are typical cross
sectional views in the circumferential direction,
showing examples of the cylindrical sleeve (1). The
figures from Figure 3 to Figure 7 have following layer
compositions. In all of the compositions, each layer
is integrally formed with the used matrix resin so as
not to cause the delamination between the layers. In
these figures, the matrix resin is shown with hatching.
Figure 3 : main layer (11) Figure 4 : the first cover layer (12) / main layer
(11) Figure 5 : the first cover layer (12) / main layer
(11) / the second cover layer (13) Figure 6 : the first cover layer (12) / main layer
(11) / cushion layer (14) / the second cover layer (13) Figure 7 : the first cover layer (12) / main layer
(11) / the third cover layer (15) / cushion layer (14)
/ the second cover layer (13)
The main layer (11) is composed with the composite
material comprising the fiber reinforcing material,
where the epoxy resin or the unsaturated polyester
resin is used as the matrix resin in Figure 1.
The first cover layer (12) and the third cover
layer (15) is composed with the composite material
comprising the non-woven fiber reinforcing material,
where the fibrous material having high heat
conductivity is used in a part, i.e., the same material
as that of the main layer (11), and the epoxy resin
or the unsaturated polyester resin as the matrix resin.
The second cover layer (13) is composed with the
composite material comprising the non-woven fiber
reinforcing material, where the fibrous material
having high heat conductivity is used in a part, i.e.,
the same material is used as that of the main layer
(11), and the epoxy resin or the unsaturated polyester
resin, which are blended with the fluororesin
particles, i.e., polytetrafluoroethylene particles,
as the matrix resin.
As for hardening of matrix resins in the main
layer (11), the first cover layer (12), the second
cover layer (13) and the third cover layer (15), when
the epoxy resin is used, said resin is hardened by
heating, and when the unsaturated polyester resin is
used, said resin is hardened at room temperature or
by heating.
The cushion layer (14) is composed with the sheet
layer of the rubber elastomer having heat resistance.
The cylindrical sleeve (1) comprising the
above-described layers is composed in stiffness, and
its surface hardness of the outermost layer is about
70 to 85 degree.
Figure 8 is a typical view showing an example of
the corrugator for manufacturing the corrugated
cardboard. (3) and (3) are a pair of corrugation rolls,
(4) is a pasting device, (5) is a finger, (6) and (6)
are guide rolls, (M) is a corrugating medium, and (L)
is a liner. In the actual device, a liner pre-heater,
a corrugating medium pre-heater, a rolling-up roll or
the like are positioned.
Figure 9 is a front view of the press roll (2)
externally mounted with the sleeve (1). The press roll
(2) has the flange (2a) as shown in the figure, to
prevent the move in the axial direction of the sleeve
(1) externally mounted in the non-fixed state.
Example 2
In the example 1, the main layer (11) of the
cylindrical sleeve (11) has the composition that the
fiber reinforcing material is woven in the state like
a blind to make the running direction of the fiber into
the cylinder length direction. However, in Example 2,
the cylindrical form is formed by using the prepreg,
which is infiltrated the fiber reinforcing material
with the matrix resin and primary hardened, and winding
the prepreg, around the first layer, the second layer,
and the n layer, where the each winding direction is
different. As for layers other than the main layer (11),
the cylindrical sleeve having the structure according
to the figure 3 to the figure 7 is produced like Example
1.
Example 3
In Example 3, the fluororubber roll having
elasticity and excellent heat resistance is used as
the press roll (2). When the above-described sleeve
(1) having the high surface hardness of the outermost
layer is externally mounted, it is possible to paste
the corrugating medium with the liner certainly at high
speed without biting the press roll (2) to the
corrugation roll, and to prevent the generation of the
noise effectively.
From Example 4 to Example 6
Figures 10, 11, and 12 are cross sectional views
showing other examples of the press roll (2) externally
mounted with the sleeve (1).
In Figure 10, numerous small holes are formed on
the rotational press roll (2) made with the metal. The
air fed into the press roll (2) is led out from the
small hole to the space between the press roll (2) and
the sleeve (1), to have an air cushion effect.
In Figure 11, numerous small holes are formed on
the fixed press roll (2) made with the metal. The air
fed into the press roll (2) is led out from the small
hole to the space between the press roll (2) and the
sleeve (1), to have an air cushion effect. The (2b)
in Figure 11 is slit grooves for leading the air.
In Figure 12, numerous small holes are formed on
the fixed press roll (2) made with the metal. The air
fed into the press roll (2) is led out from the small
hole to the space between the press roll (2) and the
sleeve (1), to have the air cushion effect.
Example 7
Figure 13 is a cross sectional view showing
further another example of the press roll (2)
externally mounted with the sleeve (1).
In Example 7, the auxiliary rolls (7) and (7) are
provided at the both sides of a contacted position (P)
in Figure 10 or 11, where the press roll (2) is
contacted with the corrugation roll (3). These
auxiliary rolls can suppress the fluid fed into the
space between the press roll (2) and the sleeve (1)
externally mounted on the press roll (2), to escape
from the press point.
The above described sleeve mounted press roll is
useful as various press rolls, for example, the press
roll feeding the paper, sheet, web or the like, which
are wound in the roll form, without generating
looseness, or the press roll for a cutting device
slitting said paper, sheet, web or the like
continuously while feeding them. However, the sleeve
mounted press roll is especially useful as the press
roll of the corrugator being the corrugated cardboard
manufacturing device.