JP3228596B2 - Calendar structure and method of using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calender structure for forming a thermoplastic polymer material such as rubber and plastic with six rolls, and a method of using the calender structure.

[0002]

2. Description of the Related Art A calender is a finishing machine used for forming a thermoplastic polymer material such as rubber and plastic into a sheet, for example, a hard PVC (polyvinyl chloride) calender, and a roll machine which forms a core of the calender. is there. In this type of calendering, the number of roll gaps (hereinafter referred to as “nips”) through which the material passes is increased by multi-rolling the rolls (multi-rolling), and at the same time, excess It is basically important to increase the number of material pools (hereinafter referred to as banks) in order to improve the quality and accuracy of products.
That is, by providing a large number of nips, the thickness accuracy and flatness of the product are improved, and deaeration inside the material is promoted, and the material is homogenized by providing a large number of banks that rotate around an axis parallel to the roll axis. . However, unnecessarily increasing the number of rolls leads to an excessive heat history and an increase in energy consumption, which lead to a decrease in the physical properties of the material, and also to an increase in the work load due to an increase in the amount of daily cleaning of the roll surface.

[0003] Based on the above viewpoint,
A calendar structure as described in Japanese Patent Publication No. 9 has been developed.
As shown in FIG. 8 (a), this is the most frequently used inverted L-type four-roll calender, ie, four rolls 10
Roll 10 at the top of the calendar consisting of 3 to 106
8 is a six-roll calender as shown in FIG. 8B in which two rolls 101 and 102 are added horizontally in parallel on the upper side of 3, and the number of nips and banks is increased. This structure generally conforms to the principle of improving the quality and accuracy of the product as described above, and is partially used.

In general, in a molding operation using a calender, as the thickness of a product sheet increases, air bubbles tend to be easily mixed in. However, removing these air bubbles can be said to be a problem of calendering. On the other hand, according to the six calender, the nip having the deaeration function can be passed five times, so that the deaeration is sufficiently performed, and a glass-clear extra-thick sheet free from air bubbles can be produced. In addition, the unkneaded powder particles and the like due to insufficient kneading in the kneading step are uniformly gelled to obtain a high-quality product having no fish eyes or pinholes even when a raw material mixed with a scrap material or a filler is used. be able to. In addition, since the molding resistance per nip can be reduced by increasing the number of times of passage through the nip, the function of suppressing heat generation in each nip is high, and it is particularly suitable for processing of hard PVC or the like which generates a large amount of frictional heat. further,
Since the rolling function can be improved, an extremely thin film having strict thickness accuracy can be processed with high accuracy.

[0005]

Problems to be Solved by the Invention
The calendar described in Japanese Patent Publication No. 19 is a conventional inverted L type 4
Since the configuration is such that two rolls are added horizontally at the top of the calender, the center of gravity of the calender body is structurally higher. When the position of the center of gravity of the calendar is increased, the influence of the vibration increases. Therefore, it is necessary to take seismic measures to maintain the strictly required thickness accuracy of the product.

[0006] In addition, as the height of the calender body increases, the raw materials cut out in a ribbon shape from the surface of a warming mill used for heating the raw materials in the previous process of the calender are re-calendered by a long conveyor. It is transported to a bank between upper rolls (hereinafter, referred to as a first bank). This is because an oscillating conveyor that swings in the axial direction of the roll is used to form a uniform bank, so that the raw material does not slip down due to vibration during transportation. Angle) about 2
Due to restriction within 5 °. Therefore, the raw material heated to an appropriate temperature by the warming mill is cooled by heat radiation and partially hardened, which causes a load variation during molding. In particular, the hardening phenomenon due to heat radiation has a large effect during the molding of the above-mentioned hard PVC or the like, and causes a serious defect during the molding. In addition, the occupied area of the equipment increases, resulting in a decrease in workability and a drawback that it is not suitable for recent land conditions.

[0007] In order to avoid the heat radiation caused by the lengthening of the conveyor, measures to install a far-infrared heater, a heat insulating cover, and the like on the conveyor may be considered. However, these may become a kind of fire for generating a fire. This causes an increase in cost and an increase in maintenance. In addition, measures to arrange the warming mill at a high place to avoid the lengthening of the conveyor can be considered, but it is impossible because the warming mill is heavy and can be exclusively installed on the factory floor. .

Further, since the first bank is a bank between rolls which are located at a high place and are arranged horizontally (hereinafter, referred to as a horizontal bank), it is difficult to directly monitor the floor from which a normal operation is performed. . In calendering, it is very important to monitor the bank.If neglected, raw materials will be piled up in irregular shapes, and heat radiation will promote local cooling and hardening, resulting in load fluctuations during molding and the thickness of the product. Accuracy decreases. In addition, when the material of the bank runs out, a serious problem such as cracking or peeling of the chill layer occurs due to a roll kiss where the roll surfaces come into contact with each other.

In order to monitor the first bank, a measure for installing a monitoring camera or the like may be considered. However, in most cases, calendering is performed at a high temperature close to 200 °, and an additive such as a plasticizer contained in the material is partially vaporized.Therefore, an exhaust gas hood is provided on all calendars. The favorable photographing from above the bank is prevented.
Raw material is supplied to the first bank in a fixed amount, and the stock amount is minimized. The behavior of the bank is constantly monitored and managed so that the stock amount does not increase or decrease. It is important to note that in the case of the above-mentioned horizontal bank at a high place, it is inevitable to rely on poor photographing conditions obliquely from above.

[0010] Furthermore, in order to cope with the increase in the length of the conveyor and the difficulty in monitoring the first bank, a countermeasure to lower the basic surface of the calender with respect to the factory floor may be considered. However,
In the calendering process, the work is performed at the temperature that is close to the thermal decomposition in order to obtain a good product with a small load by utilizing the physical properties of the thermoplastic resin etc., so an emergency situation where the worker rushes to the calendar or its vicinity occurs several times a day Sometimes. Therefore, if the base surface of the calendar is made lower than the floor of the factory and a layout using steps, ladders, and slopes is adopted, it may cause injury or injury to workers. In particular, in recent years, the demand for olefin-based resins has been increasing, which is likely to become sticky at working temperatures, and many lots of small lots of many kinds of work are liable to be disturbed in operating conditions. It is possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a six-roll calender capable of increasing the number of nips and banks to improve the quality and accuracy of a product. It is an object of the present invention to provide a calendar structure capable of keeping the height of the first bank low and monitoring the state of the first bank under favorable conditions, and a method of using the same.

[0012]

According to the present invention, there is provided, in accordance with the present invention, a calender structure for molding a thermoplastic polymer material with six rolls arranged so that their axes are substantially parallel to each other. A second roll is disposed diagonally above the first roll, and a third roll is disposed diagonally below the second roll and not adjacent to the first roll.
Are disposed adjacent to each other, a fourth roll is disposed adjacent to a side of the third roll farther from the first roll, and a fifth roll is disposed immediately below the fourth roll. A calendar structure is provided, wherein rolls are arranged adjacently, and a sixth roll is arranged adjacently below the fifth roll.

In the calendar structure, preferably, a straight line connecting the center of the first roll and the center of the second roll and a straight line connecting the center of the second roll and the center of the third roll are provided. The angle formed is approximately 90 °.

Preferably, a straight line connecting the center of the first roll and the center of the third roll is substantially parallel to a horizontal line.

In the above-mentioned calender structure, preferably, the fifth roll further comprises a cross means for inclining its axis by a small angle with respect to the original axis.

Preferably, the fifth roll has a smaller roll diameter than the fourth roll and the sixth roll.

Preferably, the first roll further comprises a crossing means for inclining the axis of the first roll by a small angle with respect to the original axis.

Preferably, the first roll and the second roll have a smaller roll diameter than at least the third roll, the fourth roll, and the sixth roll.

According to the present invention, in order to solve the above-mentioned object, the above-mentioned first and second calendar structures are used.
The raw material is supplied between the rolls of the second roll and the second roll, the material is kneaded between the rolls and formed into a sheet, and further, the second roll and the third roll,
A calender characterized in that rolling is sequentially performed between each of the third roll and the fourth roll, the fourth roll and the fifth roll, the fifth roll and the sixth roll. Is provided.

[0020]

According to the present invention constructed as described above, the third
, The fourth roll, the fifth roll, and the sixth roll constitute an inverted L-shaped four-roll calender, which has been most frequently used in the past. Then, the second roll is disposed adjacent to the diagonally upper side of the first roll, and the third roll is disposed adjacent to the diagonally lower side of the second roll and not adjacent to the first roll. By doing so, the calender structure of the present invention has a structure in which two rolls, that is, first and second rolls, are added obliquely in parallel to the third roll in the inverted L-shaped four-roll calender. However, the second roll is disposed diagonally above the third roll and farther than the fourth roll, and the first roll is at a lower position than the second roll. As a result, the height of the calender body is reduced as compared with the case where the first and second rolls are added horizontally in parallel, and the first bank at the top of the calender is not a horizontal bank but is arranged diagonally. The bank exists between the rolls (hereinafter, such a bank is referred to as an inclined bank).

As described above, since the height of the calender body is reduced, the position of the center of gravity of the calender is lowered, so that the structure is less susceptible to vibration. Therefore, it is not necessary to take an anti-seismic measure, and an increase in weight and cost is avoided. Is done. In addition, since the height of the calender body is reduced, it is possible to shorten the length of the conveyor for transporting the raw material, and eliminate the problem due to the heat radiation of the raw material without adding a special device such as a far infrared heater. be able to. Further, since the length of the conveyor can be shortened, an increase in the occupied area of the equipment can be avoided.

Further, since the first bank is an inclined bank, the visibility of the first bank is effective, and it is easy to monitor the first bank over a wide area from the factory floor, and the calendar work can be continued under optimum conditions. Becomes In addition, centralized management of the bank using a monitoring camera or the like becomes easy.

Of course, according to the calendar structure of the present invention,
As with the case where the first and second rolls are arranged horizontally,
By providing many nips, it is possible to improve the thickness accuracy and flatness of the product, promote deaeration inside the material, and homogenize the material by providing many banks that rotate around an axis parallel to the roll axis Needless to say, it is possible to improve the quality and accuracy of the product.

The fifth roll is sandwiched between the fourth and sixth rolls, and the rolling pressures generated above and below the rolls are reversed in opposite directions, so that the deflection of the fifth roll is extremely small. Few. In the present invention, the fifth roll is further provided with a cross means for inclining the axis of the fifth roll by a small angle with respect to the original axis, so that the influence of the bending of the sixth roll on the product can be corrected. Dimensional accuracy can be further improved.

Further, since the fifth roll has extremely small bending as described above, even if this roll is made smaller in diameter than the fourth roll and the sixth roll, the bending does not pose a problem. By reducing the diameter of the fifth roll, it is possible to reduce the equivalent roll diameter assuming that the fifth roll and the sixth roll have the same diameter, thereby reducing the rolling pressure,
The deflection of the sixth roll is reduced, and the dimensional accuracy of the product can be further improved. Further, the driving torque of the roll is reduced by the reduction of the rolling pressure, and power is saved.

In the present invention, the first roll is further provided with a cross means for inclining the axis of the first roll by a small angle with respect to the original axis, thereby correcting the deflection of the first and second rolls. And the dimensional accuracy of the product can be further improved. Furthermore, since the deflection of the first and second rolls can be corrected, it is possible to make the first and second rolls smaller in diameter than at least the third, fourth, and sixth rolls, thereby reducing the rolling pressure. As a result, the driving torque of the roll is reduced and power is saved.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a calendar structure and a method of use according to the present invention will be described with reference to FIGS.

FIG. 1 is a view showing a calender body having the structure of this embodiment. In FIG. 1, rolls 11, 1
The housings 2, 13, 14, 15, and 16 are housed in the housing 1 so that their axes are substantially parallel to each other, and are supported at predetermined positions of the housing 1 by pullback cylinders 11 a to 16 a. The roll 11 is provided with a reduction device 11b provided with a motor 11c and a reduction screw 11d. Similarly, the roll 12 is provided with a reduction device 12b provided with a motor 12c and a reduction screw 12d, and the roll 13 is provided with a motor 13c and a reduction screw 13d. The roll 14 is provided with a motor 14c and a screw 14d.
Is mounted with a pressing device 16b having a motor 16c and a pressing screw 16d. The pressing devices 11b, 12b, 13b, 14b, 16b adjust the gap between the rolls and thus the thickness of each nip. .
Further, a cross device 15b is attached to the roll 15, and the cross device 15b allows the roll 15 to tilt its axis by a small angle with respect to the original axis. The housing 1 is mounted on a sole plate 2 provided on a factory floor.

The arrangement of the rolls and the path of the material in the calender body will be described with reference to FIG. As shown in FIG. 2, the roll 12 is disposed adjacent to the diagonally upper side of the roll 11, and the roll 13 is disposed adjacent to the diagonally lower side of the roll 12 and at a position not adjacent to the roll 11. The roll 14 is disposed adjacent to the side farther than the roll 11, the roll 15 is disposed immediately below the roll 14, and the roll 16 is disposed immediately below the roll 15. That is, the calendar structure of the present embodiment has a structure in which two rolls, that is, rolls 11 and 12 are added obliquely in parallel to the conventional inverted L-shaped four-roll calender. However, the roll 12 is the roll 13
The roll 11 is disposed at a position farther than the roll 14 on the diagonally upper side, and the roll 11 is at a position lower than the roll 12. In FIG. 2, the gap adjustment directions of the rolls except for the roll 15 by the respective pressing devices are indicated by arrows 11e, 12e, 13e, 14e, and 14e.
16e, the crossing device 15b of the roll 15
Is indicated by an arrow 15e.

The angle α between the straight line connecting the centers of the rolls 11 and 12 and the straight line connecting the centers of the rolls 12 and 13 is approximately 90 °, and the straight line connecting the centers of the rolls 11 and 13 is substantially Parallel to the horizontal line. The arrangement of the rolls 11, 12, and 13 is determined in consideration of the actual work space, workability, and the like, and the angle α is selected in a range of, for example, about 80 ° to 120 ° according to conditions. A straight line connecting the centers of the rolls 11 and 13 may be inclined to some extent with respect to a horizontal line.

In FIG. 2, the raw material is supplied between the rolls 11 and 12, and the rolls 11 and 12 are supplied.
, Ie, the first nip 21 is rolled. At this time, the pool of excess material that cannot be passed on the entrance side of the first nip 21 becomes the first bank 31. Further, the peripheral speed of each roll increases as the roll moves from the roll 11 to the roll 16 to the succeeding roll, and the temperature of each roll increases with the succeeding roll. Normally, the material that has passed through the nip has the property of being naturally wound around a roll having a high peripheral speed or a roll having a high temperature. Second
The excess material that reaches the nip 22 and cannot pass through on the entrance side of the second nip 22 becomes the second bank 32. After that, similarly, the material that has passed through the second nip 22
3 and reaches the third nip 23 between the roll 14 and the material passing through the third nip 23 is wound around the roll 14 and reaches the fourth nip 24 between the roll 15 and the fourth nip 24.
The material that has passed through the nip 24 is wound around the roll 15 and reaches the fifth nip 25 between the roll 16 and the fifth nip 2.
The material that has passed through 5 is wound around the roll 16 and finally peeled off from the surface of the roll 16 by the take-off roll 306 (see FIG. 4), thereby forming a product 3. For this reason, adjacent rolls rotate in opposite directions. In addition, the third nip 23, the fourth
The first nip 21 is located on the entry side of the nip 24 and the fifth nip 25.
Similarly to the entry side of the second nip 22, the third bank 33,
A fourth bank 34 and a fifth bank 35 are formed.

In the arrangement shown in FIG. 2 in which the material is sequentially wound around the rolls 11 to 16 as described above, the adjacent rolls rotate in opposite directions to each other, and the peripheral speed increases as going to the succeeding rolls. Rotate around an axis parallel to each roll axis, and its rotation direction is sequentially reversed as it goes to subsequent banks. That is, in FIG. 2, the first bank 31, the third bank 33, and the fifth
The bank 35 rotates clockwise in the figure, and the second bank 32 rotates.
And the fourth bank 34 rotates counterclockwise in the figure. Thereby, the materials are sufficiently mixed in each bank.
The raw materials supplied to the first bank 31 are sufficiently degassed while passing through the five nips, are formed into sheets with high precision, and become products. Therefore, the material becomes homogenous with re-mixing, air bubbles are avoided, and even if raw materials mixed with scrap materials and fillers are used, it is possible to obtain high quality products without fish eyes and pinholes. it can. In addition, products can be produced in a wide range from ultra-thin glass-clear sheets to highly accurate ultra-thin films.

FIG. 3 is a view showing a calender body having the above-described roll arrangement and its preceding steps, and FIG. 4 is a view showing the calender body shown in FIG. 3 and a calender facility including the preceding steps. 3 and FIG.
, Raw materials and scrap materials and fillers mixed into the raw materials are measured and mixed, kneaded by a continuous kneader 302 and sent to a warming mill 303. In the warming mill 303, the kneaded raw material is heated and cut into a ribbon shape, and is conveyed to a calender body 305 by a conveyor 304. The conveyor 304 is a swing type conveyor that swings in the axial direction of the rolls in order to form a uniform bank. Therefore, the inclination angle with respect to the factory floor so that the raw materials do not slip down due to vibration during transportation. (Angle of repose) is limited to within about 25 °.
In the calender body 305, the raw material is supplied to the first bank 31 as described above, and the product 3 sequentially rolled and formed by the six rolls is peeled off from the surface of the roll 16 by the take-off roll 306 and gradually cooled. Thereafter, a predetermined pattern is formed by the embossing roll 307, the distortion is removed by reheating by the tempering roll 308, the cooling is performed by the cooling roll 309, the product thickness is measured by the thickness measuring device 310, and finally the winding is performed. It is wound by the machine 311.

The calender described in Japanese Patent Application Laid-Open No. 62-7519 has a roll 103 at the top of an inverted L-shaped four-roll calender composed of four rolls 103 to 106 as shown in FIG. On top of the two rolls 1
This is a six-roll calender as shown in Fig. 8 (b), in which 01 and 102 are added horizontally, and the center of gravity of the calender body is structurally high, which greatly affects the vibration. Disadvantageously increases.
In addition, since the height of the calender body increases, the conveyor that transports the raw materials becomes longer when the angle of repose (approximately 25 ° or less with respect to the factory floor) is considered, and the raw materials cool down due to heat radiation, and a part of the conveyor hardens. In order to prevent the load from fluctuating during molding and to prevent cooling due to heat radiation, it is necessary to additionally install a special device such as a far-infrared heater or a heat insulating cover. Further, there is a disadvantage that the occupied area of the equipment increases.

In the roll arrangement shown in FIG. 8B, since the first bank is located at a high place and is a horizontal bank existing between the rolls arranged horizontally, the first bank is located above the floor where normal work is performed. Direct monitoring is difficult, and even if a monitoring camera or the like is installed, favorable conditions for photographing from the upper side of the bank are prevented due to the presence of an exhaust gas hood or the like that sucks an additive that partially vaporizes from the material.

In contrast to the drawbacks described above, the calender structure of the present embodiment is a structure in which rolls 11 and 12 are added diagonally in parallel on the obliquely upper side of the roll 13 above the inverted L-shaped four-roll calender. Roll 1 as shown in FIG.
The height of the calender body is reduced as compared with the case where 01 and 102 are added horizontally in parallel. Therefore, the position of the center of gravity of the aircraft is lowered, making it less susceptible to vibration.
There is no need to take seismic measures, which avoids weight and cost increases.

In addition, the length of the conveyor 304 for transporting the raw materials can be shortened, troubles due to heat radiation of the raw materials can be eliminated, and special devices such as a far infrared heater are added to prevent cooling due to the heat radiation. There is no need to set it up. Furthermore, since the length of the conveyor 304 can be shortened, an increase in the occupied area of the equipment can be avoided, and the space in the factory can be effectively used. For example, when the conditions other than the roll arrangement are the same, in the case of a medium-sized calender having a roll diameter of about 610 mm, the length of the conveyor can be reduced by about 2 m. This is particularly the case for temperature-sensitive, hard plasticized PVs.
There is a remarkable effect in the case of C or the like.

Further, since the first bank 31 is not a horizontal bank but an inclined bank existing between rolls arranged diagonally, the first bank 31 is effective and can be monitored over a wide area from the factory floor. This makes it easy to carry out calendar work under optimal conditions. In particular, in order to improve the quality and accuracy, it is important for the management of the banks that the fifth bank 35, which is the final bank, and the fourth bank 3 in front of it.
4 is a uniform bank having an axis parallel to the roll axis and having a diameter of about 10 mm (this is referred to as a pencil bank).
3 is a bank corresponding to this, but in order to continue such strict working conditions unchanged, the first bank 3
Under sufficient monitoring of (1), it is indispensable that the swinging type conveyor 304 uniformly feeds the raw materials in the roll axis direction of the bank. That is, it is important to sufficiently monitor the first bank 31 under favorable conditions.

Further, since the first bank 31 is an inclined bank, the first bank 31 can be photographed from an optimum angle by a monitoring camera under favorable conditions. Therefore, it is possible to strictly visualize the behavior of the bank as a whole, thereby facilitating management by automatic control of the bank by image processing and centralized control from the control room.

Referring back to FIGS. 1 and 2, the roll 15 is sandwiched between the rolls 14 and 16, and the rolling pressure generated above and below the roll is reversed in the opposite direction, so that the roll 15 is extremely bent. . In this embodiment, the roll 15
Since the cloth device 15b is attached to the roller, if the axis of the roll 15 is inclined by a small angle with respect to the original axis, an effect of further correcting the influence of the deflection on the product can be obtained, and the dimensional accuracy of the product can be further improved. Can be improved. still,
This cross device 15b can be omitted.

As described above, the calender structure of this embodiment is the same as that of the roll 1 above the conventional inverted L-shaped four-roll calender.
Since the rolls 11 and 12 are added diagonally in parallel on the upper side of 3, the height of the calender body is lower than that in a case where two rolls are added horizontally in parallel. As a result, the position of the center of gravity of the fuselage is lowered, so that it is not necessary to take an earthquake-resistant measure, and an increase in weight and cost is avoided, and the length of the conveyor 304 can be shortened. It is possible to eliminate a problem due to heat radiation of the raw material without adding an apparatus. In addition, since the length of the conveyor 304 can be shortened, an increase in the occupied area of the equipment can be avoided, and the space in the factory can be effectively used.

Further, since the first bank 31 is an inclined bank, the first bank 31 has a clear view, and it is easy to monitor the wide area from the factory floor, and the calendar work can be continued under the optimum condition. it can. In addition, the first bank 31 can be photographed from the optimum angle by the monitoring camera under favorable conditions, thereby facilitating centralized management of the banks.

Also in this embodiment, as in the case where two rolls are added horizontally in parallel on the conventional inverted L-shaped four-roll calender, the thickness accuracy of the product can be improved by providing many nips. The effect of improving the flatness, sufficiently deaeration of the inside of the material, and homogenizing the material by providing a large number of banks can be obtained, thereby improving the quality and accuracy of the product.

Further, since the cloth device 15b is attached to the roll 15, the influence of the deflection of the roll 16 on the product can be corrected, and the dimensional accuracy of the product can be further improved.

Next, another embodiment of the calendar structure and the method of use according to the present invention will be described with reference to FIG. In FIG. 5, an angle β formed between a straight line connecting the centers of the rolls 12 and 13 and the vertical line is about 30 °, and the straight line connecting the centers of the rolls 11 and 13 is inclined with respect to the horizontal line. The angle α between the straight line connecting the centers of the rolls 11 and 12 and the straight line connecting the centers of the rolls 12 and 13 is substantially 90 ° as in FIG.
Other configurations are the same as those in FIG.

In this case, the roll 11 is located slightly above the position in FIG. 2, and the first bank 31 faces slightly upward from the case in FIG. Therefore, the length of the conveyor for transporting the raw materials is slightly longer than in the case of FIG. The present embodiment is mainly applied to a small calender, and is configured to prevent, for example, the lower part of a conveyor for transporting raw materials from becoming too low, making inconvenience of traffic and lowering workability. is there. By making the length of the conveyor slightly longer than in the case of FIG. 2, a sufficient space for providing a passage or the like can be secured.

Also, in this case, the first bank 31 is slightly higher than in the case of FIG. 2, so that the visibility is less effective than in the case of FIG. 2, but this embodiment is mainly applied to a small calendar. Since it is applied, a certain degree of prospect is effective, and it is not difficult to monitor the first bank 31 over a wide area from the factory floor.

According to the present embodiment configured as described above,
A sufficient space for providing a passage can be secured without impairing the effects of the above-described embodiment, and a reduction in workability can be prevented.

Next, still another embodiment of the calendar structure and method of use according to the present invention will be described with reference to FIG. In FIG. 6, the fifth roll 15A has a smaller roll diameter than the rolls 14 and 16, and a cross device similar to the roll 15 in FIG. 1 is attached to the roll 15A. Can tilt its axis by a small angle with respect to the original axis. That is, the present embodiment corresponds to FIGS.
In this calender structure, the diameter of the fifth roll is reduced, and the other configuration is the same as that of FIG.
However, in FIG. 6, the direction of the axis inclination of the roll 15A is indicated by an arrow 15f.

Hereinafter, the operation of reducing the diameter of the roll as described above will be described. The roll 15A can be reduced in diameter because it is sandwiched between the rolls 14 and 16, and the rolling pressure generated above and below the roll is reversed in the opposite direction, so that the bending is extremely small. Is hardly a problem. Here, the roll diameter of the roll 15A d _1, the roll diameter of the roll 16 and d _2, the equivalent roll diameter of both rolls constituting the fifth nip 35 and _{d 0, d 0 = 2d 1} · d 2 / It is represented as (d ₁ + d ₂ ). For example, when d ₁ = 460 mm and d ₂ = 610 mm, d ₀ = 524 mm, and the roll 16 is 524 mm from the 610 mm diameter.
This means that the diameter has been reduced.

It has been theoretically proved that the rolling pressure decreases in proportion to d ₀ / d ₂ , and the rolling pressure decreases by reducing the equivalent roll diameter, thereby reducing the amount of deflection. Further, the sheet thickness accuracy of the product is further improved. At the same time, the roll driving torque, which is a function of the rolling pressure, can be reduced, so that power saving and mechanical cost can be reduced.

According to the present embodiment configured as described above,
The same effects as in the embodiment described with reference to FIGS. 1 to 4 can be obtained, and by reducing the diameter of the roll 15,
The equivalent roll diameter of the roll 5 and the roll 16 can be reduced, the deflection of the roll is reduced, and the dimensional accuracy of the product can be further improved. In addition, power saving and reduction of machine cost can be achieved by lowering the rolling pressure.

Next, still another embodiment of the calendar structure and method of use according to the present invention will be described with reference to FIG. In FIG. 7, a cross device similar to the roll 15 of FIG. 1 is attached to the first roll 11A so that the roll device 11A can tilt its axis by a small angle with respect to the original axis. Has become. Further, the roll 11A and the second roll 12
A has a smaller roll diameter than the rolls 13, 14 and 16. That is, in the present embodiment, in the calendar structure of FIG. 6, a cloth device is attached to the first roll, and the diameter of the first and second rolls is reduced. The same is true. However, in FIG. 7, the axis inclination direction of the roll 15A is indicated by an arrow 15f.
Thus, the axis inclination direction of the roll 11A is indicated by an arrow 11f.

In this embodiment, by attaching a cloth device to the roll 11A, the rolls 11A and 12A
Can be corrected, and the dimensional accuracy of the product can be further improved. Rolls 11A and 12A
In this embodiment, the diameters of the rolls 11A and 12A are made smaller than at least the rolls 13, 14, and 16 in this embodiment. Thereby, the roll 15 in the embodiment of FIG.
Rolling pressure can be reduced as in the case of the effect of reducing the diameter of A, so that the driving torque of the roll is reduced and power is saved.

According to the present embodiment configured as described above,
A cloth device is provided on the roll 11A, and the rolls 11A and 1
Since the diameter of the roll 2A is made smaller than at least the rolls 13, 14, and 16, the deflection of the roll 11A can be corrected, the dimensional accuracy of the product can be further improved, and power consumption and machine cost can be reduced by lowering the rolling pressure. Can be reduced.

[0056]

According to the present invention, it is possible to improve the quality and accuracy of products by increasing the number of nips and banks, to lower the center of gravity of the calender body, and to eliminate the need for seismic measures. An increase in weight and cost is avoided. In addition, the length of the conveyor from the previous process can be shortened, and the trouble due to the heat radiation of the raw materials can be eliminated without adding a special device. Further, an increase in the occupied area of the equipment can be avoided, and the space in the factory can be effectively used.

Further, the first bank can be monitored under favorable conditions, and calendar work can be continued under optimal conditions. In addition, it becomes easy to centrally manage the banks using the monitoring camera.

Further, since the cross means is provided, it is possible to correct the influence on the product due to the bending of the roll, and it is possible to further improve the dimensional accuracy of the product. Further, since the diameter of the roll is reduced, it is possible to save power and reduce mechanical costs by lowering the rolling pressure.

Further, a sufficient space for providing a passage or the like can be secured without impairing the above-mentioned effects, and a decrease in workability can be prevented.

[Brief description of the drawings]

FIG. 1 is a view illustrating a calender body having a calender structure according to an embodiment of the present invention.

FIG. 2 is a diagram schematically showing an arrangement of each roll and a material path in the calender body shown in FIG.

FIG. 3 is a view showing a calender body having the roll arrangement of FIG. 2 and a preceding process thereof.

FIG. 4 is a view showing a calender body including the calender body shown in FIG. 3 and a pre-process thereof.

FIG. 5 is a view schematically showing an arrangement of rolls and a material path in a calendar structure according to another embodiment of the present invention.

FIG. 6 is a view schematically showing an arrangement of each roll and a material path in a calendar structure according to still another embodiment of the present invention.

FIG. 7 is a view schematically showing an arrangement of each roll and a material path in a calendar structure according to still another embodiment of the present invention.

FIG. 8 is a view schematically showing the arrangement of each roll and the path of a material in a conventional calendar structure, where (a) is a conventional inverted L-shaped four-roll calendar most frequently used;
(B) is a two-roll calender on the inverted L-shaped four-roll calender of (a).
This is a six-roll calender in which two rolls are added horizontally and in parallel.

[Explanation of symbols]

 11, 12, 13, 14, 15, 16 Roll 11A, 12A Roll 15b Crossing Device 15A Roll 21 First Nip 22 Second Nip 23 Third Nip 24 Fourth Nip 25 Fifth Nip 31 First Bank 32 Second Bank 33 Third bank 34 Fourth bank 35 Fifth bank 304 Conveyor

Claims (8)

(57) [Claims] 1. A calender structure for molding a thermoplastic polymer material by six rolls arranged so that their axes are substantially parallel to each other, wherein a second roll is disposed adjacent to a diagonally upper side of the first roll. Disposing, disposing a third roll adjacent to a position diagonally below the second roll and not adjacent to the first roll,
A fourth roll is disposed adjacent to a side of the third roll farther than the first roll, and a fifth roll is disposed immediately below the fourth roll, A calendar structure, wherein a sixth roll is disposed adjacent to and directly below a fifth roll. 2. The calender structure according to claim 1, wherein a straight line connecting the center of the first roll and the center of the second roll is connected to the center of the second roll and the center of the third roll. A calendar structure, wherein an angle between the straight line and the straight line is substantially 90 °. 3. The calendar structure according to claim 1, wherein a straight line connecting a center of said first roll and a center of said third roll is substantially parallel to a horizontal line. 4. The calender structure according to claim 1, further comprising a crossing means for inclining the axis of the fifth roll by a small angle with respect to the original axis. Calendar structure. 5. The calender structure according to claim 1, wherein the fifth roll has a smaller roll diameter than the fourth roll and the sixth roll. Calendar structure. 6. The calender structure according to claim 1, further comprising a cross means for inclining the axis of the first roll by a small angle with respect to the original axis. Calendar structure. 7. The calender structure according to claim 6, wherein the first roll and the second roll have a roll diameter at least larger than that of the third roll, the fourth roll, and the sixth roll. A calendar structure characterized by being small. 8. A raw material is supplied between the first roll and the second roll using the calender structure according to any one of claims 1 to 7, and the material is supplied between the rolls. The sheet is kneaded together with the second roll and the third roll, the third roll and the fourth roll, the fourth roll and the fifth roll, the fifth roll and the A method of using a calender, characterized in that the sixth roll is sequentially rolled between each roll.