JPH06198666A - Six roll calenders - Google Patents

Abstract

PURPOSE:To provide six roll calenders wherein the resultant force of rolling force acting on a roll is reduced, an error on a thickness of a product can be reduced by decreasing deflection, driving power can be decreased by reducing a torque acting on the roll, and further total height of the calender rolls can be lowered. CONSTITUTION:A second roll R2 is arranged beside a first roll R1, and a third roll R3 is arranged under the second roll R2. A fourth roll R4 is arranged beside the third roll R3 on an opposed side of the first roll R1, and a fifth roll R5 and a sixth roll R6 are in a straight line arranged under the fourth roll R4. A plane connecting shaft centers of the first roll R1 and the second roll R2 is slanted to a plane connecting shaft centers of the third roll R3 and the fourth roll R4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a six-roll calender for polymers such as rubber and plastic.

[0002]

2. Description of the Related Art Conventionally, in a polymer calendar for rubber, plastic, etc., an inverted L-type four-calendar (A), an L-type four-calendar (B), and a Z-type four-calendar (C) shown in FIG. Etc. have been widely used. However, in such a four-roll calender, so-called banks, in which excess material is accumulated in the roll gap, are formed only at three places (B1, B2, B3), so that material conversion (kneading by reversal) is insufficient and rolling There was a problem that the quality of the sheet was not good.

In order to solve such a problem, an inverted L type five roll calendar (A) and an L type five roll calendar (B) shown in FIG. 8 have appeared. However, in such a calendar, the rolls R2, R3, and R4 are arranged in a straight line, so that the rolls R2 and R3 must be moved at the same time in order to adjust the gap between the fixed rolls R4 and R3, and R3. In order to adjust the gap of R2, only the roll R2 needs to be moved independently, and the mechanism and operation are complicated, and the apparatus becomes expensive.

Furthermore, an M-type five-roll calender shown in FIG. 9 has been proposed and used in part. However, in this roll calendar, when the rolled material is peeled off along the surface of the roll R4 (indicated by), the peripheral speed of the roll R5 must be slower than that of the roll R4. Therefore, the rotation directions of bank B3 and bank B4 are the same,
There was a problem that the material quality in the bank B4 was not effective and the product quality was deteriorated. On the other hand, when the rolled material is peeled off along the surface of the roll R5 (indicated by), the roll R5 roll-crosses in order to intersect the axes and make the thickness of the rolled material uniform. R
Since the distance between the take-up roll (take-off roll) following No. 5 and the roll R5 becomes large, there is a drawback that neck-in (width shrinkage) is large in peeling off the semi-molten sheet.

In order to solve such a problem, as shown in FIG. 10, a six-roll calender in which a roll R6 is added under the roll R5 of an M-type five-roll calender has been proposed and partially used. (Japanese Patent Publication No. 2-36370 (“Structure and Usage of Six Roll Calender”). However, in such a calendar, the roll R2 receives the rolling forces orthogonal to each other from the rolls R1 and R3, and the resultant force becomes large. As a result, there is a problem in that the thickness error of the sheet rolled by the rolls R1 and R2 is increased, the thickness error is not sufficiently improved between subsequent rolls, and the thickness error of the product is aggravated. Since the resultant force acting on R2 is large, the torque for driving this becomes large, and the driving power becomes large as compared with other rolls. Many number of roles compared to M-type 5-roll calender, the height of the roll arrangement there is high becomes a problem as compared with the prior art.

[0006]

SUMMARY OF THE INVENTION The present invention was devised to solve the various problems described above. That is, a first object of the present invention is to provide a six-roll calender capable of reducing the resultant force of the rolling forces acting on the rolls, reducing the deflection, and reducing the product thickness error. A second object of the present invention is to provide a six-roll calender capable of reducing the torque acting on the roll and reducing the driving power. Further, a third object of the present invention is to provide a six roll calender capable of reducing the total height of the calender roll.

[0007]

According to the present invention, there is provided a six-roll calender in which first roll R1 to sixth roll R6 are arranged in parallel with each other to form a nip between adjacent rolls. , The second roll R2 is disposed on the side of the first roll R1, the third roll R3 is disposed on the lower side of the second roll R2, and the third roll R3 is disposed on the side opposite to the first roll R1 on the side of the third roll R3. The fourth roll R4 is arranged, the fifth roll R5 and the sixth roll R6 are linearly arranged below the fourth roll R4, and the plane connecting the axes of the first roll R1 and the second roll R2 is the third roll. 6, which is inclined with respect to a plane connecting the axes of the roll R3 and the fourth roll R4.
This roll calendar is provided.

Further, according to the present invention, in the six-roll calendar in which the first roll R1 to the sixth roll R6 are arranged in parallel with each other to form a nip between the rolls adjacent to each other, the first roll R1 The second roll R2 is disposed on the side of the second roll R2, the third roll R3 is disposed on the lower side of the second roll R2, and the fourth roll R4 is disposed on the side opposite to the first roll R1 on the side of the third roll R3. The fifth roll R5 and the sixth roll R6 are linearly arranged below the fourth roll R4, and the plane connecting the axes of the second roll R2 and the third roll R3 is the fourth roll R4 and the fifth roll R5. A six-roll calender is provided which is inclined with respect to a plane connecting the axes of the roll R5.

According to a preferred embodiment of the present invention, the diameter of the second roll R2 or the third roll R3 is smaller than that of the first roll R1 and the fourth roll R4. Also, the second roll R2
Is larger than the diameters of the first roll R1 and the fourth roll R4. Further, the inclination angle θ is preferably 10 ° to 80 °, and particularly preferably 30 ° to 45 °.

[0010]

According to the structure of the present invention, the plane connecting the axial centers of the first roll R1 and the second roll R2 is inclined with respect to the plane connecting the axial centers of the third roll R3 and the fourth roll R4. Therefore, the rolling force acting on the second roll R2 or the third roll R3 is not orthogonal, the resultant force is small and the bending is reduced,
It is possible to reduce the thickness error of the rolled sheet. Further, since the resultant force acting on the roll becomes small, the torque for driving the roll becomes small and the driving power becomes small. Further, the roll diameter can be made smaller than that of the other rolls, whereby the driving power can be further reduced. Further, according to the configuration of the present invention, the height of the roll arrangement can be reduced by the inclination angle, and a 6-roll calender having a height comparable to that of the conventional M-type 5-roll calender can be obtained. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. 1 to 5 are configuration diagrams showing an embodiment of a six-roll calendar according to the present invention. In the six roll calendar of these figures, the first roll R1 through the sixth roll
The rolls R6 are arranged in parallel with each other, forming a nip between the rolls and the rolls that are adjacent to each other. Further, the second roll R2 is arranged on the side of the first roll R1, and the second roll R2
The third roll R3 is arranged on the lower side of the second roll R3.
The fourth roll R4 is arranged on the side opposite to the first roll R1 on the lateral side, and the fifth roll R5 and the sixth roll R6 are linearly arranged below the fourth roll R4.

1, 2, 3, and 5, the plane connecting the axes of the first roll R1 and the second roll R2 is the plane connecting the axes of the third roll R3 and the fourth roll R4. On the other hand, it is inclined at an angle θ. Further, in FIG. 4, the plane connecting the axes of the second roll R2 and the third roll R3 is inclined at an angle θ with respect to the plane connecting the axes of the fourth roll R4 and the fifth roll R5. There is.

In FIG. 1 (A), the first roll R1 to the sixth roll R6 are rolls of the same diameter, of which the fifth roll R5 is a fixed roll having a fixed axial center and is equipped with a roll cross adjusting device. ing. Further, the other rolls can move their axes so that the roll gap can be adjusted. In the configuration of this figure, the plane connecting the axes of the first roll R1 and the second roll R2 forms an angle θ with respect to the horizontal plane, and thus the plane connecting the axes of the first roll R1 and the second roll R2. Is inclined at an angle θ with respect to the plane connecting the axes of the third roll R3 and the fourth roll R4.

With this structure, the component of the rolling force acting on the first roll R1 to the second roll R2 cancels a part of the rolling force from the third roll R3, and the second roll R2.
Is reduced, and the thickness error of the sheet rolled by the second roll R2 can be reduced. FIG. 1B shows an embodiment in which the diameter of the second roll R2 is reduced by reducing the bearing load. For example, when the bending of the roll may be the same as the conventional one depending on the target rolled material, the diameter of the second roll R2 can be reduced as shown in this figure. This not only reduces the manufacturing cost of the roll, but also reduces the drive torque of the roll and the drive power.

FIG. 1 (C) shows an embodiment in which the diameter of the fifth roll R5 is also made small, whereby the manufacturing cost of the roll is further reduced, and the driving torque of the fifth roll is also reduced to reduce the driving power. You can

FIG. 2A is a configuration diagram showing a second embodiment of a six-roll calendar according to the present invention. In this figure, the first roll R1 to the sixth roll R6 are rolls of the same diameter, of which the fifth roll R5 is a fixed roll having a fixed axial center and is equipped with a roll cross adjusting device. Further, the other rolls can move their axes so that the roll gap can be adjusted. These configurations are shown in Figure 1.
Is the same as. Furthermore, the third roll R3 and the fourth roll R4
The plane connecting the axes of the first roll R1 and the second roll R2 forms the angle θ with respect to the horizontal plane, and the plane connecting the axes of the first roll R1 and the second roll R2 defines the axes of the third roll R3 and the fourth roll R4. It is inclined at an angle θ with respect to the connecting plane.

With such a structure, the component of the rolling force acting from the fourth roll R4 to the third roll R3 cancels a part of the rolling force from the second roll R2, and the third roll R3.
The bending of the sheet can be reduced, and the thickness error of the sheet rolled by the third roll R3 can be reduced. FIG. 2B is an embodiment in which the diameter of the third roll R3 is reduced by reducing the bearing load. As in the case of FIG. 1B, this not only reduces the manufacturing cost of the roll, but also reduces the drive torque of the roll and the drive power.

FIG. 2 (C) shows an embodiment in which the diameter of the fifth roll R5 is also reduced, whereby the manufacturing cost of the roll is further reduced, and the driving torque of the fifth roll is also reduced to reduce the driving power. You can

FIG. 3A is a constitutional view showing a third embodiment of a six-roll calendar according to the present invention. In this figure, the plane connecting the axes of the third roll R3 and the fourth roll R4 forms an angle θ with respect to the horizontal plane, whereby the plane connecting the axes of the first roll R1 and the second roll R2 is It is inclined at an angle θ with respect to a plane connecting the axes of the third roll R3 and the fourth roll R4. Also, the fourth roll R4
The plane connecting the axes of the sixth roll R6 is the second roll R6.
The plane that is substantially parallel to the plane connecting the axes of the second roll R3 and the third roll R3 and that connects the centers of the third roll R3 and the fourth roll R4 is almost the same as the axis of the second roll R2 and the third roll R3. They are orthogonal.

With this configuration, the first roll R1 and the second roll R1
Since the component force of the rolling force between the rolls R2 acts in the direction of the third roll R3, the bending of the second roll R2 is reduced, and the second roll R2 is reduced.
The thickness error of the sheet rolled by 2 can be reduced. In addition, the total height of the roll arrangement is reduced, which facilitates work and maintenance. Further, by making θ an appropriate angle (for example, 32.5 °), the total height of the roll can be made equal to that of the M-type five-roll.

FIG. 3B shows an embodiment in which the diameter of the second roll R2 is made smaller by reducing the bearing load, and FIG. 3C shows an embodiment in which the diameter of the fifth roll R5 is also made smaller. is there. This reduces roll manufacturing costs,
In addition, the drive torque of the roll is also reduced, and the drive power can be reduced.

FIG. 4A is a constitutional view showing a fourth embodiment of a six-roll calendar according to the present invention. In this figure, the plane connecting the axes of the second roll R2 and the third roll R3 forms an angle θ with respect to the vertical plane, and thus the plane connecting the axes of the second roll R2 and the third roll R3 becomes , The fourth roll R4 and the fifth roll R5 are inclined at an angle θ with respect to the plane connecting the axes.

With this configuration, the component of the rolling force between the first roll R1 and the second roll R2 acts in the direction of the fourth roll R4, so that the deflection of both the second roll R2 and the third roll R3 is reduced, It is possible to reduce the thickness error of the sheet rolled by the second roll R2 and the third roll R3. Figure 4
(B) shows the second roll R2 and the third roll due to the reduction of the bearing load.
This is an example in which the diameter of the roll R3 is reduced. Figure 1
As in the case of (B), this not only reduces the manufacturing cost of the roll, but also reduces the drive torque of the roll.
Driving power can be reduced.

FIG. 5 is a block diagram showing a fifth embodiment of the six-roll calendar according to the present invention. In this figure,
First roll R1 and third roll R3 to sixth roll R
6 has the same diameter, but the diameter of the second roll R2 is larger than the other rolls. Further, the roll upper surface heights of the first roll R1 and the second roll R2 are arranged horizontally. As a result, the axes of the first roll R1 and the second roll R2 form an angle θ with the horizontal plane.

With this configuration, the first roll R1 and the second roll R1
The upper surfaces of the rolls R1 and R2 can be at the same height while keeping the axis of the roll R2 at an angle θ with respect to the horizontal plane, and the operability of the roll calendar can be improved.

FIG. 6 schematically shows the rolling force P2 acting on the second roll R2 in the roll calender having the structure shown in FIGS. 1 and 3 to 5. Note that FIG.
The same applies to the third roll R3 in FIG. In FIG. 6A, in the conventional six-roll calendar, the rolling forces acting on the rolls R1 and R3 (both are P) are orthogonal to each other, so P2 = 1.414P. On the other hand, in FIG. 6B, in the present invention, the roll R
90 between the axis of 1 / R2 and the axis of rolls R2 / R3
It forms an angle of + θ (°) and P2 = 2P · cos
The relationship is (90 + θ) / 2. As a result, for example, when θ is 30 °, P2 = 2P · cos60 = P,
When θ is 45 ° and 15 °, 0.765 respectively.
P, 1.217P. Therefore, P2 = 1.414P
Compared with the conventional example, when θ is 30 °, the load is about 70%, and when θ is 45 ° and 15 °, about 54%, 8%.
The load is 6%, the resultant force of the load is small, the bending is reduced, and the thickness error of the sheet rolled by the roll can be reduced.

Further, by reducing the bearing load, the diameter of the second roll R2 can be reduced. For example, if the bending of the roll is the same as the conventional one, the conventional roll diameter 28i
It can be 26 in when θ is 30 ° with respect to n, and 24 in and 27 in when θ is 45 ° and 15 °.
Can be This not only reduces the roll manufacturing cost, but also reduces the roll drive torque.
Driving power can be reduced. The reduction rate of this driving power is about 86, 93, 9 when θ is 45, 30, 15 °.
It will be 6%.

The calculated value is the rolling force calculated by the roll R1,
When R2 and R3 are calculated with the same diameter roll,
When the roll R2 has a small diameter, the bank thickness of the roll contact portion on the introduction side increases, so that the rolls R1 and R2 (and R2
-It is known that the rolling load during R3) becomes small (for example, the ARDICHVILI formula). Therefore, since the amount of roll deflection is further reduced, the diameter of the second roll R2 can be further reduced.

[0029]

As described above, according to the present invention, the first
The plane connecting the axes of the roll R1 and the second roll R2 is the third
The second roll R2 or the third roll R3 is inclined because it is inclined with respect to the plane connecting the axes of the roll R3 and the fourth roll R4.
The rolling forces acting on the sheet are not orthogonal to each other, the resultant force is small, the bending is reduced, and the thickness error of the sheet rolled by the roll can be reduced. Further, since the resultant force acting on the roll becomes small, the torque for driving the roll becomes small and the driving power becomes small. Further, the roll diameter can be made smaller than that of the other rolls, whereby the driving power can be further reduced. Further, according to the configuration of the present invention, the height of the roll arrangement can be reduced by the inclination angle, and a 6-roll calender having a height comparable to that of the conventional M-type 5-roll calender can be obtained. .

Therefore, according to the present invention, it is possible to reduce the resultant force of the rolling forces acting on the rolls, reduce the deflection and reduce the thickness error of the product, reduce the torque acting on the rolls, and reduce the driving power. It is possible to provide a 6-roll calender capable of lowering the overall height of the calender rolls.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a six-roll calendar according to the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of a six-roll calendar according to the present invention.

FIG. 3 is a configuration diagram showing a third embodiment of a six-roll calendar according to the present invention.

FIG. 4 is a configuration diagram showing a fourth embodiment of a six-roll calendar according to the present invention.

FIG. 5 is a configuration diagram showing a fifth embodiment of a six-roll calendar according to the present invention.

FIG. 6 is a diagram schematically showing rolling force P2 acting on a second roll R2.

FIG. 7 is a configuration diagram of a conventional four-roll calendar.

FIG. 8 is a configuration diagram of a conventional L-type five-roll calendar.

FIG. 9 is a configuration diagram of a conventional M-type five-roll calendar.

FIG. 10 is a configuration diagram of a conventional 6-roll calendar.

[Explanation of symbols]

 R1 1st roll R2 2nd roll R3 3rd roll R4 4th roll R5 5th roll R6 6th roll B1 bank B2 bank B3 bank B4 bank θ inclination angle

Claims (6)

[Claims] 1. The first roll R1 to the sixth roll R6 are:
In a six-roll calender that is arranged in parallel with each other to form a nip between adjacent rolls, a second roll R2 is arranged laterally to the first roll R1 and a second roll R2 is arranged below the second roll R2. 3 rolls R3 are placed, 3rd
The fourth roll R4 is arranged on the side opposite to the first roll R1 on the side of the roll R3, and the fifth roll R5 and the sixth roll R6 are arranged linearly below the fourth roll R4. And the plane connecting the axis of the second roll R2,
A six-roll calendar characterized by being inclined with respect to a plane connecting the axes of the third roll R3 and the fourth roll R4. 2. The first roll R1 to the sixth roll R6,
In a six-roll calender that is arranged in parallel with each other to form a nip between adjacent rolls, a second roll R2 is arranged laterally to the first roll R1 and a second roll R2 is arranged below the second roll R2. 3 rolls R3 are placed, 3rd
The fourth roll R4 is arranged on the side opposite to the first roll R1 on the side of the roll R3, the fifth roll R5 and the sixth roll R6 are arranged linearly below the fourth roll R4, and the second roll R2. And the plane connecting the axis of the third roll R3,
A six-roll calendar characterized by being inclined with respect to a plane connecting the axes of the fourth roll R4 and the fifth roll R5. 3. The diameter of the second roll R2 or the third roll R3 is smaller than that of the first roll R1 and the fourth roll R4,
The six-roll calendar according to claim 1 or 2, characterized in that. 4. The diameter of the second roll R2 is the first roll R1.
And the diameter of the fourth roll R4 is larger than that of the fourth roll R4. 5. The six-roll calender according to claim 1, wherein the inclination angle θ is 10 ° to 80 °. 6. The six-roll calender according to claim 5, wherein the inclination angle θ is 30 ° to 45 °.