JP3968879B2 - 7-roll calender and rolling forming method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seven-roll calender for rolling molding of thermoplastic resins such as rubber and plastic, and a rolling molding method thereof.
[0002]
[Prior art]
A calendering device that rolls plastics and rubber is a rolling machine with several heating rolls, which uses thermoplastic resin such as vinyl chloride resin to form a film or sheet, or on a cloth, etc. Used to coat plastic. In general, 2 to 7 heating rolls (calendar rolls) are combined, and there are L-type, reverse L-type, Z-type, inclined Z-type, M-type, and the like.
[0003]
FIG. 2 is a schematic diagram of a conventional L-type seven-roll calender, which is disclosed in, for example, “multi-roll calender for rubber or synthetic resin” (Japanese Patent Laid-Open No. 51-14459). The L-type seven-roll calender 1 composed of the seven calender rolls R1 to R7 carries the thermoplastic resin molding material 2 into the gap (nip) between the rotating calender rolls R1 and R2 arranged at the bottom. Next, the molding material 2 is formed by rolling on the rolls of R3, R4, R5, R6 and R7, which are sequentially arranged in a straight line upward of R2, and further formed on the entry side of each nip between adjacent rolls. The film-like member 4 is formed into a film-like member having a predetermined thickness via the six resin reservoirs (banks) a to f and is drawn from the roll R7 to the downstream device via the take-off roll (take-off roll) 3. I am carrying it out.
[0004]
Further, FIG. 3 is a schematic diagram of a conventional six-roll calender, and is disclosed in, for example, “Structure and method of use of six-roll calendar” (Japanese Patent Publication No. 2-3636). The six-roll calender 11 composed of the six calendar rolls R1 to R6 is placed at the uppermost portion, and is parallel to the substantially horizontal, and carries the thermoplastic resin molding material 12 into the rotating nips of R1 and R2. Next, the molding material 12 is successively rolled and molded at R5 and R6 in the vertical direction in the downward direction of R4, R4 provided on the side farther than R1 on the side of R3, R3 arranged sequentially below R2. The film-like member 14 is carried out from the roll R6 to the downstream device via the take-off roll 13 via the banks a to e.
[0005]
[Problems to be solved by the invention]
In the L-shaped seven-roll calender shown in FIG. 2 described above, since six banks a to f can be installed, it is possible to prevent a flow mark phenomenon that is likely to occur in a film-like member. However, on the upper side of the rotatable fixed roll R4 in FIG. 2, three rolls R5 to R7 are rotatably supported in the inner bearing base 5 and the outer bearing base 6 having a double structure. Further, the outer bearing base 6 is slidably incorporated in a calendar body (not shown). In this way, the upper roll group has a triple structure, and further, the molding material 2 is carried from the lowermost R1 and R2 and rolled while being conveyed upward, so the mechanism is very complicated and configured. There were many members, and there was a problem that equipment cost became expensive. In addition, since the six rolls are arranged vertically in a straight line, the overall height of the machine is increased, and maintenance is difficult. In addition, the factory building is inevitably high. Furthermore, since the film-like member 4 is taken from the position where R7 of the final roll is high, there is also a problem that it is difficult to connect and arrange with the downstream device.
[0006]
On the other hand, in the 6-roll calender shown in FIG. 3, since the overall height of the roll is lower than that of the above-described L-type 7-roll calender, there is no need to increase the factory building. A single arrow (for example, ←) in the roll shown in the drawing represents a moving direction for holding a predetermined nip leftward by a roll gap adjusting device (not shown). In addition, a double arrow (for example, ← →) in the roll indicates a roll cross (shaft crossing) device that makes the plate thickness uniform. In this way, each roll is moved by a predetermined amount and rolled into a flat film-like member. However, the film-like member 14 rolled from the final pass composed of the R5 roll and the R6 roll is downstream from the take-off roll 13 in a state where the winding angle θ1 of the outer peripheral surface of the R6 roll is wound by 3/4 (270 degrees). It is being carried out to the device. Thus, since the roll contact side of the film-like member 14 in a semi-solidified state is wound at a large angle of 270 degrees for a long time, the film-like member 14 is considerably heated and held. On the other hand, the side which does not contact a roll will be in an air cooling state, and thermal imbalance will generate | occur | produce in a film-like member. As a result, the temperature difference and viscosity unevenness occur in the film-like member due to a large temperature difference, and the draw ratio (speed ratio) with the take-off roll has to be reduced, and it cannot be stretched uniformly in the flow direction. In particular, there is a problem that it is difficult to produce a thin film member having a thickness of 0.1 mm or less.
[0007]
Furthermore, as shown in FIG. 3, the non-winding portion of the film-like member 14 on the outer peripheral surface of the final roll R6 (the constant exposure of the outer peripheral surface of the roll during rolling) is only 1/4 turn (90 degrees). In the process of rolling, a plasticizer (oily) and a part of other compounding agents that are sticky from the thermoplastic resin molding material are deposited on the roll surface or fixed with heat on the outer peripheral surface of the roll. If this plasticizer oil or solid matter is left untreated, the oil on the outer surface of the roll will adhere to the surface of the film-like member, or the peeling from the roll surface will become uneven, and the transparency, surface properties, and flatness Etc. will cause a significant deterioration. For this reason, the machine is frequently stopped and the worker manually cleans the outer peripheral surface of the roll with a cloth or the like. In particular, the final roll R6 has a great influence on quality assurance, so it must be performed carefully. However, as described above, since the exposed area of the outer peripheral surface can be held only for 90 degrees, the machine must be completely stopped and cleaned over time, and there is a problem that productivity is greatly reduced. .
[0008]
The present invention has been developed to solve such problems. That is, the objects of the present invention are as follows: (1) The molding material can be carried in from above, and a large number of nips can be held to prevent the flow mark phenomenon of the film-like member. (2) The structure is simplified and the machine height is increased. or else can be lowered, (3) the wrap angle of the final roll can be reduced, to reduce the temperature difference between the film-like member, can be extended (4) even if the size of the draw ratio between takeoff roll uniform, (5) To provide a seven-roll calender and a rolling method that can reliably and quickly clean the outer peripheral surface of the roll during operation.
[0009]
[Means for Solving the Problems]
According to the present invention, the first roll R1 to the seventh roll R7 arranged in parallel to each other are formed in such a manner that a nip is sequentially formed between adjacent rolls and a thermoplastic resin molding material is rolled into a film-like member. A seven-roll calender, the second roll R2 is disposed on the lateral side of the first roll R1, the third roll R3 is disposed on the lower side of the second roll R2, and the first on the lateral side of the third roll R3. A fourth roll R4 is disposed on the opposite side of the roll R1, and a fifth roll R5, a sixth roll R6, and a seventh roll R7 are sequentially arranged in a straight line below the fourth roll R4 .
Furthermore, a take-off roll into which the film-like member enters is arranged between the seventh roll R7,
The take-off roll is located on the opposite side of the first roll R1 with respect to a virtual plane that includes the axis of the seventh roll R7 and extends in the vertical direction,
The film-like member from the nip between the sixth roll R6 and the seventh roll R7 forming the final pass is directed toward the take-off roll, and the film-like member is placed between the nip and the take-off roll to the seventh roll R7. Wrap around the outer peripheral surface of
A seven-roll calender is provided, wherein the film-like member is drawn in the direction opposite to the first roll R1 through the take-off roll .
[0010]
From the first roll R1 to the seventh roll R7 arranged in parallel with each other, the nip is sequentially formed between the adjacent rolls and the thermoplastic resin molding material is rolled into a film-like member by the configuration of the present invention. A seven-roll calender, wherein the second roll R2 is disposed on the lateral side of the first roll R1, the third roll R3 is disposed on the lower side of the second roll R2, and the second roll R3 is disposed on the lateral side of the third roll R3. Since the fourth roll R4 is disposed on the opposite side of the first roll R1, and the fifth roll R5, the sixth roll R6, and the seventh roll R7 are sequentially disposed below the fourth roll R4, the thermoplastic resin This molding material can be conveyed from the upper part to the lower part and can be rolled and formed in a natural state without difficulty. Further, the upper roll group of the above-described L-shaped seven-roll calender has a triple structure, but the number of complicated constituent members can be considerably reduced and simplified. Furthermore, since the machine height can be reduced by one roll as compared with the L-type seven-roll calender, the factory building can be lowered and the equipment cost can be reduced. In addition, the nip of the 6-roll calender has 5 locations, but can be increased to 6 locations, that is, banks a to f, so that the thickness of the film-like member can be dealt with in a wide range and the occurrence of the flow mark phenomenon can also be prevented. . Further, the film-like member from the nip between the sixth roll R6 and the seventh roll R7 that forms the final path is directed toward the take-off roll, and the film-like member is placed between the nip and the take-off roll. Since the film-like member is wound around the outer peripheral surface of R7 and taken out in the direction opposite to the first roll R1 through the take-off roll, the winding angle at the final roll, that is, the winding distance is reduced to reduce the temperature difference of the film-like member. it can.
[0011]
According to a preferred embodiment of the present invention, the fifth roll R5 is a fixed or roll-crossable roll, and the sixth roll R6 and the seventh roll R7 forming the final path are stored in the bearing stand so as to be movable up and down integrally. And a roll gap adjusting device integrated with R6 and R7 and a roll gap adjusting device with R7 alone, and the sixth roll R6 has a roll cloth device.
According to this configuration, the sixth roll R6 and the seventh roll R7 forming the final path are integrally stored in the bearing stand so as to freely move up and down, and the roll gap adjusting device integrated with R6 and R7 and the roll gap of R7 alone. Since the sixth roll R6 has a roll cloth device, the rolls R6 and R7 can be moved up and down integrally with the roll R5 that can be fixed or roll-crossed, so that the roll gap adjustment between the R5 can be adjusted. It can be done quickly and easily. Further, since the roll R6 has the roll cloth device, a film-like member having a uniform thickness can be carried out from the final pass. Further, when R5 is a roll that can be roll-crossed, crown correction of the nip between R4 and R5 can be performed as necessary. Moreover, since a film-like member is taken up from the low position of the last roll R7 arrange | positioned at the lowest part, connection arrangement | positioning with a downstream apparatus becomes easy.
[0012]
Further, according to the present invention, the second roll R2 is disposed on the lateral side of the first roll R1, the third roll R3 is disposed on the lower side of the second roll R2, and the first roll is disposed on the lateral side of the third roll R3. A fourth roll R4 is disposed on the opposite side of the roll R1, and a fifth roll R5, a sixth roll R6, and a seventh roll R7 are sequentially arranged in a straight line below the fourth roll R4 .
Furthermore, a take-off roll into which the film-like member enters is arranged between the seventh roll R7,
The take-off roll is located on the opposite side of the first roll R1 with respect to a virtual plane that includes the axis of the seventh roll R7 and extends in the vertical direction,
In a state where the rotation speed of the downstream roll is successively higher than that of the adjacent upstream roll, the thermoplastic resin molding material is carried into the nip between the first roll R1 and the second roll R2, and then rolled. Rolled at the nip between the roll R2 and the third roll R3, sequentially rolled at the nip between the third roll R3 and the fourth roll R4, rolled at the nip between the fourth roll R4 and the fifth roll R5, and the fifth roll Rolled at the nip between R5 and the sixth roll R6,
Finally, the film-like member from the nip between the sixth roll R6 and the seventh roll R7 that forms the final path is directed toward the take-off roll, and the film-like member is placed between the nip and the take-off roll . Wound around the outer peripheral surface of the roll R7,
The film-like member is taken out in the direction opposite to the first roll R1 through the take-off roll ,
And the rolling forming method characterized by carrying out rolling forming to the film-like member of predetermined thickness, carrying out, maintaining the exposure area of the outer peripheral surface at the time of winding of all the rolls to 1/2 or more of a roll outer peripheral surface. Provided.
[0013]
According to the method of the present invention, the second roll R2 is disposed on the lateral side of the first roll R1, the third roll R3 is disposed on the lower side of the second roll R2, and the first roll is disposed on the lateral side of the third roll R3. A fourth roll R4 is arranged on the opposite side of the roll R1, and a fifth roll R5, a sixth roll R6, and a seventh roll R7 are sequentially arranged in a straight line below the fourth roll R4. (1) Downstream side In a state where the rotational speed of the first roll R1 is successively higher than that of the adjacent upstream roll, a thermoplastic resin molding material is carried into the nip between the first roll R1 and the second roll R2 and rolled. (2) Next Rolled at the nip between the second roll R2 and the third roll R3, (3) Rolled sequentially at the nip between the third roll R3 and the fourth roll R4, (4) Nip between the fourth roll R4 and the fifth roll R5 in rolled, (5) nip between the fifth roll R5 sixth roll R6 Rolled, the wound (6) Finally the sixth small direction of wrap angle of the outer peripheral surface of the to the film-like member rolled from the nip between the rolls R6 and seventh roll R7 seventh roll R7 to form a final pass Take up in the direction opposite to 1 roll R1, (7) And roll-form to a film-like member of a predetermined thickness while holding the exposed area of the outer peripheral surface at the time of winding of all the rolls more than 1/2 of the roll outer peripheral surface Then carry it out. That is, since each roll peripheral speed is increased from R1 to the downstream side sequentially and a thermoplastic resin molding material is conveyed from the upper part to the lower part and can be roll-formed, a film-like member can be produced efficiently. . Further, the film-like member from the nip between the sixth roll R6 and the seventh roll R7 forming the final pass is directed toward the take-off roll, and the film-like member is moved between the nip and the take-off roll . It is wound around the outer peripheral surface of 7 rolls R7, and the film-like member is pulled in the direction opposite to the first roll R1 through the take-off rolls . Accordingly, ie wrap angle at the final roll, because the winding distance can be reduced, to reduce the temperature difference between the film-like member, even if the size of the draw ratio between takeoff roll, it is possible to uniformly stretch above normal . In addition, the exposed area of the outer peripheral surface when winding all the rolls is maintained at 1/2 (180 degrees) or more of the outer peripheral surface of the roll, so that the line is not stopped at an operating speed that does not interfere with the manual work of the workers. Since the outer peripheral surface of the roll can be reliably and quickly cleaned during operation, the operating rate can be increased and productivity can be improved.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.
FIG. 1 is an overall configuration diagram showing the arrangement of a seven-roll calendar according to the present invention. In this figure, a seven-roll calender 21 of the present invention is rotatably supported at both shaft ends in a calender body (not shown), and a nip is sequentially formed between adjacent rolls to form a thermoplastic resin molding material 22. It is comprised from the calender roll of the 1st roll R1 thru | or 7th roll R7 arrange | positioned in parallel with each other which is rolled and shape | molded on the film-like member 23. FIG. Further, six banks a to f are formed on the entry side of each nip between adjacent rolls.
[0015]
As shown in FIG. 1, the seven-roll calendar 21 has a second roll R2 disposed on the lateral side of the first roll R1, a third roll R3 disposed on the lower side of the second roll R2, and a third roll calendar 21. A fourth roll R4 is arranged on the side opposite to the first roll R1 on the side of the roll R3, and a fifth roll R5, a sixth roll R6, and a seventh roll R7 are arranged in a straight line sequentially below the fourth roll R4. Then, the film-like member 23 rolled from the nip between the sixth roll R6 and the seventh roll R7 forming the final pass is wound in the direction in which the winding angle (θ2) of the outer peripheral surface of the seventh roll R7 is small. It is taken in the direction opposite to the roll R1. Therefore, the molding material 22 can be conveyed from the upper part to the lower part, and can be rolled and formed in a natural state without difficulty. In addition, the number of components for rolling can be reduced and simplified.
[0016]
Furthermore, since the machine height can be reduced by one roll as compared with the conventional L-type seven-roll calender, the factory building can be lowered and the equipment cost can be reduced. Further, the nip of the conventional six-roll calender has five locations, but the thickness of the film-like member can be dealt with in a wide range by adding six locations, that is, banks a to f, and the flow mark phenomenon Occurrence can also be prevented. Further, the film-like member rolled from the nip between the sixth roll R6 and the seventh roll R7 forming the final pass is wound in the direction in which the winding angle θ2 of the outer peripheral surface of the seventh roll R7 is small and opposite to the first roll R1. Since it is taken in the direction, the winding angle θ2 at the final roll R7, that is, the winding distance can be reduced to reduce the temperature difference of the film-like member.
[0017]
In addition, as shown in FIG. 1, the fifth roll R5 is a roll that can be fixed or roll-crossed freely. Further, the sixth roll R6 and the seventh roll R7 forming the final path are housed in a bearing stand 24 that slides up and down integrally in a calendar body (not shown), and a roll gap adjusting device integrated with R6 and R7. In addition, it has a roll gap adjusting device by R7 alone, and the sixth roll R6 has a roll cloth device. Accordingly, the rolls R6 and R7 can be integrally moved up and down with respect to the roll R5 which can be fixed or roll-crossed, so that the adjustment of the roll gap between R5 can be performed quickly and easily. Further, since the roll R6 has the roll cloth device, a film-like member having a uniform thickness can be carried out from the final pass. Further, when R5 is a roll that can be roll-crossed, crown correction of the nip between R4 and R5 can be performed as necessary. In addition, since the film-like member 23 is taken up by the take-off roll 25 from the lower position of the final roll R7 arranged at the lowermost part, the connection arrangement with the downstream apparatus becomes easy.
[0018]
Next, referring to FIG. 1, a method for rolling and forming a seven-roll calendar according to the present invention will be described. A seven-roll calender 21 composed of a first roll R1 to a seventh roll R7 arranged in parallel to form a nip sequentially between adjacent rolls to roll a thermoplastic resin molding material into a film-like member. (1) A thermoplastic resin molding material 22 is placed in the nip between the first roll R1 and the second roll R2 in a state where the rotational speed (roll peripheral speed) of the downstream roll is successively higher than that of the adjacent upstream roll. Carry in and roll, (2) Next, roll in the nip between the second roll R2 and the third roll R3, (3) Roll sequentially in the nip between the third roll R3 and the fourth roll R4, (4) Rolling at the nip between the fourth roll R4 and the fifth roll R5, (5) Rolling at the nip between the fifth roll R5 and the sixth roll R6, and (6) Finally, a sixth roll R6 that forms the final pass Pressure from the nip between the seventh roll R7 The film-like member 23 thus wound is wound in the direction in which the winding angle (θ2) of the outer peripheral surface of the seventh roll R7 is small and taken in the direction opposite to the first roll R1, and (7) and the outer peripheral surface when all the rolls are wound The film is rolled and formed into a film-like member having a predetermined thickness while keeping the exposed area of the film at half or more of the roll outer peripheral surface. Thereby, since each roll peripheral speed can be accelerated so that it may go to the downstream side sequentially from R1, and the molding material 22 can be conveyed one by one from the upper part to the lower part, it can roll-mold sequentially, Therefore The film-like member 23 can be produced efficiently. .
[0019]
In addition, since the film-like member 23 rolled from the nip between R6 and R7 forming the final pass can be wound in the direction where the winding angle θ2 of the outer peripheral surface of R7 is small and pulled in the direction opposite to R1, it is semi-solidified. The roll contact side (non-self-adhering side) of the film-like member in the state can be reduced to 1/4 turn, that is, about 90 degrees. Therefore, to reduce the temperature difference between the film member 23, even if the size of the draw ratio between the take-off roll 25, can be uniformly stretched above normal. In addition, the exposed area of the outer peripheral surface when winding all the rolls is maintained at 1/2 (180 degrees) or more of the outer peripheral surface of the roll, so that the line is not stopped at an operating speed that does not interfere with the manual work of the workers. Since the outer peripheral surface of the roll can be cleaned reliably and quickly during operation, the operating rate can be increased and the productivity can be improved.
[0020]
In addition, this invention is not limited to embodiment mentioned above, For example, a calender roll diameter may be either a same diameter roll or a different diameter roll, Of course, it can change variously in the range which does not deviate from the summary of this invention. It is.
[0021]
【The invention's effect】
As described above, according to the present invention, (1) a molding material can be carried in from above, and a large number of nips can be held to prevent a flow mark phenomenon of a film-like member. (2) The structure is simplified, and mechanically height can also be less, (3) can be reduced wrap angle at the final roll, to reduce the temperature difference between the film-like member, (4) uniformly stretch it to a draw ratio was large between takeoff roll (5) It is possible to provide a seven-roll calender and a rolling method that can reliably and quickly clean the outer peripheral surface of the roll during operation.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram showing an arrangement of a seven-roll calendar according to the present invention.
FIG. 2 is a schematic view showing a conventional L-type seven-roll calender.
FIG. 3 is a schematic view showing a conventional six-roll calender.
[Explanation of symbols]
R1, R2, R3, R4, R5, R6, R7 Calendar rolls a, b, c, d, e, f Resin pool (bank)
θ1, θ2 Winding angle 1 L-type 7 roll calender 11 6 roll calender 21 7 roll calender 2, 12, 22 Molding material 3, 13, 25 Take-off rolls 4, 14, 23 Film-like member 5 Inner bearing stand 6 Outside Bearing stand 24 Bearing stand

Claims (3)

This is a seven-roll calender composed of a first roll R1 to a seventh roll R7 arranged in parallel with each other, in which a nip is sequentially formed between adjacent rolls to roll a thermoplastic resin molding material into a film-like member. The second roll R2 is disposed on the lateral side of the first roll R1, the third roll R3 is disposed on the lower side of the second roll R2, and on the lateral side of the third roll R3 on the opposite side of the first roll R1. 4th roll R4 is arrange | positioned, 5th roll R5, 6th roll R6, and 7th roll R7 are arrange | positioned linearly in order under the 4th roll R4 ,
Furthermore, a take-off roll into which the film-like member enters is arranged between the seventh roll R7,
The take-off roll is located on the opposite side of the first roll R1 with respect to a virtual plane that includes the axis of the seventh roll R7 and extends in the vertical direction,
The film-like member from the nip between the sixth roll R6 and the seventh roll R7 forming the final pass is directed toward the take-off roll, and the film-like member is placed between the nip and the take-off roll to the seventh roll R7. Wrap around the outer peripheral surface of
A seven-roll calender, wherein the film-like member is pulled out in the direction opposite to the first roll R1 through the take-off roll .   The fifth roll R5 is a roll that can be fixed or roll-crossed, and the sixth roll R6 and the seventh roll R7 that form the final path are integrally stored in a bearing stand so as to be movable up and down, and the roll gap between R6 and R7 is integrated. The seven-roll calender according to claim 1, wherein the seven-roll calender has an adjusting device and a roll gap adjusting device for R7 alone, and the sixth roll R6 has a roll cloth device. The second roll R2 is disposed on the lateral side of the first roll R1, the third roll R3 is disposed on the lower side of the second roll R2, and the fourth roll is disposed on the lateral side of the third roll R3 on the opposite side of the first roll R1. A roll R4 is arranged, and a fifth roll R5, a sixth roll R6, and a seventh roll R7 are sequentially arranged in a straight line below the fourth roll R4 .
Furthermore, a take-off roll into which the film-like member enters is arranged between the seventh roll R7,
The take-off roll is located on the opposite side of the first roll R1 with respect to a virtual plane that includes the axis of the seventh roll R7 and extends in the vertical direction,
In a state where the rotation speed of the downstream roll is successively higher than that of the adjacent upstream roll, the thermoplastic resin molding material is carried into the nip between the first roll R1 and the second roll R2, and then rolled. Rolled at the nip between the roll R2 and the third roll R3, sequentially rolled at the nip between the third roll R3 and the fourth roll R4, rolled at the nip between the fourth roll R4 and the fifth roll R5, and the fifth roll Rolled at the nip between R5 and the sixth roll R6,
Finally, the film-like member from the nip between the sixth roll R6 and the seventh roll R7 that forms the final path is directed toward the take-off roll, and the film-like member is placed between the nip and the take-off roll . Wound around the outer peripheral surface of the roll R7,
The film-like member is taken out in the direction opposite to the first roll R1 through the take-off roll ,
And the rolling forming method characterized by rolling and carrying out to the film-shaped member of predetermined thickness, holding the exposure area of the outer peripheral surface at the time of winding of all the rolls to 1/2 or more of a roll outer peripheral surface.

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