JP6033017B2 - Heat exchange control device for production line of strip - Google Patents

Description

  The present invention relates to a heat exchange control device for a production line for a strip-shaped body.

  For example, there is a production line that is manufactured by conveying a continuous film-like (or sheet-like) belt-like body (manufacturing object) while being in rolling contact with a roll, such as an extrusion laminator line, a cast film line, and a sheet forming line. It is used in many fields.

  When controlling the temperature of the belt-like body being conveyed in the production line of such a belt-like body (manufacturing object), the roll itself is composed of a heating roll having a temperature higher than that of the belt-like body (giving heat to the belt-like body). Or a cooling roll having a temperature lower than that of the belt (takes heat away from the belt) is employed.

  In Patent Document 1, as an example, by transporting an optical film (manufactured object) formed in a pinching device while being in rolling contact with a plurality of cooling rolls arranged at the subsequent stage of the pinching device. An optical film production line configured to cool and solidify is disclosed.

JP 2010-228217 A (FIG. 1)

  Since the belt-like body that is the manufacturing object is constantly moving, it can contact the heat exchange roll only for a short time. Therefore, in order to perform sufficient heat exchange with one heat exchange roll, it is necessary to make the set temperature of the heat exchange roll greatly different from the temperature at which the strip passes through the heat exchange roll. However, the belt-shaped body that performs temperature control in this type of production line is likely to have an undesirable effect on quality if the temperature difference from the heat exchange roll is too large. Moreover, there is a limit to the degree of freedom of the set temperature in relation to the configuration or cost of the heat exchange roll.

  Under such circumstances, in order to secure a desired heat exchange amount, the heat exchange roll itself must be made larger or a larger number of heat exchange rolls must be prepared. However, this has been a major factor in increasing the size and cost of the equipment.

  The present invention has been made to solve such a conventional problem, and an object of the present invention is to further reduce the size and cost of the entire production line for this type of belt-like body.

The present invention is a heat exchange control device for a production line of a belt-shaped body manufactured by transporting the belt-shaped body while being in rolling contact with the roll, wherein at least one of the rolls applies heat to the belt-shaped body, or A position where the shortest distance between the strip on the entry side of the heat exchange roll and the strip on the exit side is smaller than the roll diameter of the heat exchange roll, the heat exchange roll taking heat away from the strip. to place multiple sub-roll, and of the sub-roll plurality of, at least one sub-roll along the outer periphery of Rutotomoni the heat exchanger roll provided on the side of the same with the heat exchange roll to the strip the movable der Rukoto is obtained by solving the above problems.

  According to the present invention, it is possible to further reduce the size and cost of the entire production line for the belt-like body.

The principal part block diagram which shows an example of embodiment of the heat exchange control apparatus of the manufacturing line of the strip | belt shaped material which concerns on this invention Schematic operation explanatory diagram of FIG. Schematic diagram showing an example of another embodiment of the present invention

  Hereinafter, an example of an embodiment of the present invention will be described in detail based on the drawings.

  FIG. 1 is a configuration diagram schematically showing a main part of a heat exchange control device of a production line for a strip according to an example of an embodiment of the present invention, and FIG. 2 is a schematic operation explanatory diagram thereof. 1 and 2 are both schematic views and are not accurate sectional views.

  In this embodiment, the present invention is applied to a heat exchange control device 15 of a production line 14 (the whole is not shown) of a strip-like body (for example, a laminate film) 12.

  The belt-like body 12 is manufactured by being conveyed while being in rolling contact with a plurality of rolls (only one is shown in FIG. 1). In this example, among the plurality of rolls, the illustrated roll 16 is configured as a heating roll (specific heat exchange roll) that applies heat to the strip 12. That is, the heating roll 16 has a built-in heater (not shown), and the temperature of the outer peripheral surface 16 a of the heating roll 16 is the temperature at which the strip 12 is wound around the outer peripheral surface 16 a of the heating roll 16. Rather, it is configured to be maintained at a higher predetermined temperature.

  The configuration itself for maintaining the outer peripheral surface 16a of the heating roll 16 at a predetermined temperature is not particularly limited. In short, it is only necessary that the temperature of the outer peripheral surface 16a be maintained at a higher temperature than that of the strip 12 so that heat can be transferred from the heating roll 16 side to the strip 12 as a result (so that heat can be exchanged). In this embodiment, the heating roll 16 having the same configuration as the conventional one is used.

  The production line 14 for the strip 12 according to this embodiment includes a path changing mechanism Pc1 that can change the angle θ that contacts the heating roll 16 when the strip 12 moves.

  In this embodiment, the path changing mechanism Pc1 includes sub-rolls 36 to 39 that can change the path of the belt-like body 12 with respect to the heating roll (specific heating roll) 16 when the control unit 19 and the belt-like body 12 come into contact with each other. And a sub-roll moving unit 20 that moves the sub-rolls 36 to 39.

  In the present invention, the sub-roll refers to a roll defined as follows in relation to a specific heat exchange roll. That is, the sub-roll is “a roll that is arranged adjacent to a specific heat exchange roll and is used to adjust the degree of rolling of the strip to the specific heat exchange roll” (Condition 1) ). On the other hand, the specific heat exchange roll is “a roll that can obtain a contact angle exceeding 180 degrees by the sub-roll, and can maintain the main path of the belt-like body only by the specific heat-exchange roll without the sub-roll. (Condition 2). For example, when confirming whether a certain roller A in the production line corresponds to a sub-roller of the present invention, it is assumed that there is a roller B adjacent to the roller A, the roller A is a sub-roller, and the roller B is a specific heat exchange roller. When the above conditions 1 and 2 are satisfied simultaneously for the roller A and the roller B, it can be said that the roller A is a sub-roller and the roller B is a specific heat exchange roller.

  If it confirms on the basis of this embodiment, when it assumes that the heating roll 16 is the specific heat exchange roll of this invention, the sub-rolls 36-39 will be arrange | positioned adjacent to the heating roll 16, and the said roll It can be said that it is a roll used for adjusting the degree of rolling contact of the strip 12 to the heating roll 16, and therefore satisfies the condition 1 as a sub-roll of the present invention. Moreover, when the heating roll 16 assumes that the sub-rolls 36 to 39 are the sub-rolls of the present invention, “the contact angle exceeding 180 degrees can be obtained by the sub-rolls 36 to 39 and the sub-rolls 36 to 39 are not provided. Since this is a roll that can maintain the main path of the strip 12 only with the heating roll 16, the condition 2 as a specific heat exchange roll is satisfied. And since conditions 1 and 2 are materialized simultaneously, subrolls 36-39 are subrolls concerning the present invention, and heating roll 16 is a specific heat exchange roll concerning the present invention.

  According to this definition, whether or not a certain roller A is a sub-roll according to the present invention does not affect whether or not the roll A is a roll that can exchange heat with the strip. For example, the sub rolls 36 to 39 may themselves be sub heat exchange rolls.

  Returning to the description of the configuration, the sub-rolls 36 to 39 are brought into rolling contact with the belt-like body 12, and the degree of rolling contact between the belt-like body 12 and the heating roll 16 can be changed according to the mode of the rolling contact. In this embodiment, the two sub-rolls 36 and 37 on the inlet side of the heating roll 16 change the degree of rolling contact between the belt-like body 12A on the inlet side and the heating roll 16, and the two sub-rolls on the outlet side of the heating roll 16 38 and 39 can change the degree of rolling contact between the strip 12 </ b> B on the exit side and the heating roll 16.

  The controller 19 controls the overall movement of the path changing mechanism Pc1, and outputs a drive signal for a motor 22 to be described later. The control unit 19 includes a memory 19A in which various data are stored in advance for each type of the belt-like body 12, and an arithmetic circuit 19B. Further, various signals, for example, the temperature signal S1 of the strip 12 and the heating roll 16 detected in real time, the specific detection signal S2 related to the quality of the product, and the trouble occurrence signal M1 input manually, etc. The interface 19C and the like for taking in are provided. In this embodiment, the trouble occurrence signal M1 can be manually input by an operator, but instead of or in addition to this, for example, the temperature signal S1, the specific detection signal S2, etc. You may comprise so that it may produce | generate automatically within the control part 19 from information.

  The sub-roll moving unit 20 is connected to a common motor 22, input and output speed reducers 32 and 33 that are simultaneously driven by the motor 22, and the speed reducers 32 and 33. (A direction perpendicular to the paper surface of FIG. 1) The basic structure provided on the outside is composed of a total of four individual moving units 20A to 20D (one side in the axial direction: individual moving unit 20A on the front side of FIG. 1; Only 20B is shown).

  The individual moving unit 20A on the entry side (lower side of the paper in FIG. 1) and the individual movement unit 20B on the outgoing side (upper side of the paper in FIG. 1) are only symmetrical with respect to the horizontal plane H1, and the basic structure is as follows. Are the same. The individual moving parts 20C and 20D on the other axial side which are not shown in the figure are the same as the individual moving parts 20A and 20B which are shown in the figure but are symmetrical with respect to a plane perpendicular to the axis. . However, these individual moving units 20A to 20D do not necessarily have the same basic structure. The motor 22 may also be provided individually. When the motor 22 is common, the facilities can be shared, which is advantageous in terms of cost and simplifies the control.

  The individual moving units 20A and 20B on the entry side and the exit side include a common guide unit 25 that constrains the movement trajectory of the rotation axes O1 to O4 of the sub-rolls 36 to 39 concentrically with the rotation axis O6 of the heating roll 16. .

  For convenience, the description will be made more specifically by mainly focusing on the individual moving part 20A on the entry side. The individual movement part 20A on the entry side includes a screw 44 that receives the output of the speed reducer 32, and a screw that rotates as the screw 44 rotates. 44, a support plate 48 that is swingably connected to the nut 46 (or a member integral with the nut 46) and supports the sub rolls 36 and 37 on the entry side, and the support plate 48 provided with the above-mentioned The slide unit 50 mainly engages with the guide unit 25 and slides along the guide unit 25 to move the support plate 48. The screw 44 and the nut 46 constitute a so-called ball screw set. The screw 44 is connected to the output shaft 32A of the speed reducer 32 via a universal joint portion 32B so as to be swingable.

  The sub-rolls 36 to 39 are supported by the support plate 48 in such a manner that the pair of support plates 48 of the sub-roll moving unit 20 located on both outer sides in the rotation axis direction of the heating roll 16 are connected. The support plate 48 is movable along the guide unit 25 via the slide portion 50 while being allowed to swing around the nut 46 portion. As is clear from FIG. 2, the sub-rolls 36 to 39 do not come into contact with the heating roll 16 in any moving position.

  In addition, the main path for the heating roll 16 in the production line 14 for the strip 12 according to this embodiment includes the rotation axis O6 of the heating roll 16 and a plane perpendicular to the strip 12A on the heating roll entrance side as a reference plane. When P is set, the belt-like body 12A on the heating roll inlet side and the belt-like body 12B on the heating roll outlet side are set so as to be located on the same side P1 with respect to the reference plane P. By adopting the basic form of the main path in this manner, the entrance-side sub-rolls 36 and 37 and the exit-side sub-rolls 38 and 39 can be opposed to each other, and the heating roll entry-side strip 12A and the heating roll exit The main path can be configured so as to be closer to the belt-like body 12B on the side. In this embodiment, by arranging the sub-rolls 36 to 39 from this viewpoint, the shortest distance Ms1 between the heating roll inlet-side belt-like body 12A and the heating roll outlet-side belt-like body 12B becomes the roll of the heating roll 16. The main path can be changed by the path changing device Pc1 so as to be smaller than the diameter D1.

  Note that the sub-roll moving unit 20 of the path changing mechanism Pc1 is located outside the heating roll 16 in the rotation axis direction. That is, the guide unit 25, the support plate 48, and the screw 44 are all located outside the rotation axis direction of the heating roll 16. Further, the sub-rolls 36 to 39 are not in contact with the heating roll 16 in any moving position. On the other hand, the guide unit 25 is not formed over the entire circumference of the heating roll 16, but has an opening 25A in a part thereof. The opening 25A has a size L1 through which both end portions of the heating roll 16 (portions supported by bearings not shown) can pass. Accordingly, the heating roll 16 can be replaced through the opening 25A while the path changing mechanism Pc1 is incorporated in the production line.

  Next, mainly referring to FIGS. 2A to 2C, the operation of the heat exchange control device 15 of the production line 14 of the strip 12 will be described.

  In the present embodiment, when the maximum heat exchange amount is drawn from the heating roll 16, the motor 22 is actuated by a drive signal from the control unit 19 to form a state as shown in FIG. That is, when focusing on the entry side, the screw 44 is rotated by the output of the speed reducer 32 driven by the motor 22, and the nut 46 is moved to the tip end side (counter speed reducer side) of the screw 44.

  As a result, the support plate 48 swingably connected to the nut 46 (or a member integral with the nut 46) moves to the vicinity of the opening 25A of the guide unit 25, and the belt-like body 12A on the heating roll entry side and the heating roll. The shortest distance Ms <b> 1 between the outgoing side strip 12 </ b> B is smaller than the roll diameter D <b> 1 of the heating roll 16. As a result, the belt-like body can secure a contact angle θo in a range exceeding 180 degrees.

  That is, when the main path is brought into a state as shown in FIG. 2A by the function of the sub-rolls 36 to 39, the belt-like body 12 can be in contact with the heating roll 16 for a longer time than before, so that the heating roll 16 itself Even if it is equivalent to the prior art, more heat exchange can be performed than before. That is, the temperature of the belt-like body 12B when it comes out of the heating roll 16 is higher than the conventional one. Therefore, if the total required heat capacity may be the same, the number of heating rolls to be used as the entire production line 14 can be reduced as compared with the conventional case, and the entire production line 14 can be made smaller.

  Moreover, since the preset temperature of the heating roll 16 is equivalent to the conventional one, the quality of the strip 12 can be maintained as high as the conventional one.

  Further, in this embodiment, the sub-rolls 36 to 39 are respectively arranged with respect to the belt-like body 12A on the heating roll entry side and the belt-like body 12B on the heating roll exit side, and between the rotation axes O1 to O4 of the sub-rolls 36 to 39. By changing the distance, the shortest distance Ms1 between the belt-like body 12A on the heating roll inlet side and the belt-like body 12B on the heating roll outlet side is changed. It can be taken large with a simple configuration.

  In the present embodiment, the amount of heat received from the heating roll 16 can be further reduced as necessary. Specifically, as shown in FIG. 2B, the ball screw 44 is rotated, and the nut 46 is moved to the speed reducer 32 side. The nut 46 moves linearly on the screw 44, and the nut 46 moves along the guide unit 25 via the support plate 48 and the slide portion 50. Therefore, the nut 46 draws an arc coaxial with the heating roll 16 together with the support plate 48 and approaches the speed reducer 32 side. The screw 44 swings with the universal joint portion 32B of the speed reducer 32 as a fulcrum so as to follow the movement of the nut 46.

  As a result, the sub-rolls 36 and 37 supported by the support plate 48 slide together with the support plate 48 and move coaxially with the heating roll 16 and without contact with the heating roll 16. Since this action is performed in the same way on the exit side, the main path of the strip 12 is changed so that it is symmetrically expanded on both the entrance and exit sides, and the contact angle θ of the strip with respect to the heating roll 16 is It decreases from θo to θ1.

  In this embodiment, since the motor 22 is common on the entry side and the exit side, the movement on the entry side and the exit side are performed in synchronization, and as a result, the temperature of the strip 12 can be changed quickly. When motors are provided separately on the input side and the output side, in addition to the control mode in which the input side and the output side are moved synchronously with an emphasis on the change speed, fine adjustment is emphasized and the input and output sides are emphasized. A control mode for individually moving the sides can also be realized.

  In order to further reduce the amount of heat received from the heating roll 16, as shown in FIG. 2C, the nut 46 is further moved to the speed reducer 32 side by further rotating the screw 44. As a result, the contact angle θ between the heating roll 16 and the strip 12 is further reduced from θ1, and eventually the strip is completely separated from the heating roll 16 (zero contact angle). That is, by transporting the strip 12 without contacting the heating roll 16, the amount of heat received from the heating roll 16 by the strip 12 when the strip 12 passes through the portion of the heating roll 16 may be zero. it can.

  Since the amount of heat that the strip 12 receives from the heating roll 16 is substantially proportional to the contact angle θ, this embodiment is different from the maximum amount of heat received in the state of FIG. 2A in the state of FIG. An arbitrary amount of heat received up to the minimum amount of heat received (zero) can be set easily and quickly simply by driving the motor 22 according to a command from the control unit 19 and determining the position of the nut 46 by rotating the screw 44. Can do.

  Since the heat exchange control device 15 according to this embodiment has such an effect, for example, contact is made by feedforward control based on data stored in advance in the memory 19A of the control unit 19 for each material to be manufactured. It is possible to realize control in which the angle θ is changed and set in advance to perform heat exchange. Further, for example, based on a temperature signal S1 of a material detected in real time or a heating roll, or a specific detection signal S2 related to product quality, the contact angle θ is changed and set in real time by feedback control. It is also possible to realize control for performing exchange.

  Furthermore, in this embodiment, as shown in FIG. 2C, the path changing mechanism is configured to completely separate the strip 12 from the heating roll 16. For this reason, when some trouble occurs on the production line 14, the strip can be immediately separated from the heating roll 16. Further, for example, when a plurality of heating rollers are prepared, use or non-use of the plurality of heating rollers can be easily selected (even during operation). Furthermore, since the belt-like body 12 can be immediately separated from the heating roll 16, it is possible to avoid the melting of the belt-like body 12 when a trouble occurs and to basically keep the line as it is. Therefore, it is possible to minimize the strips 12 that are wasted, and it is easy to start up the line again.

  In addition, it is thought from the meaning of this invention that when the present invention is carried out, there are many cases where the belt-like body 12 comes into contact so that most of the heating roll 16 is wound. In the present invention, the movement (variable) of the rotation axis of the sub-rolls 36 to 39 is not necessarily essential. However, in this embodiment, the rotation axis of the sub-rolls 36 to 39 is variable, and Since it is set as “variable so that the heat exchanging roll can be exchanged” through the opening 25A, the heating roll 16 can be exchanged without any trouble with the sub rolls 36 to 39 attached as necessary.

  In the above description, the heating roll is taken as an example of the heat exchange roll. However, in the present invention, the same effect can be obtained when a cooling roll is used as the heat exchange roll.

  In the above embodiment, the present invention has been applied for the purpose of enabling as much heat exchange as possible with a single heating roll. However, the present invention can be changed by changing the viewpoint. It can also be applied in various ways. For example, if the amount of heat exchange desired to be obtained by one heat exchange roll may be the same (if the final temperature may be the same), the heat exchange roll to be used can be further downsized. It is also possible to design the set temperature of the heat exchange roll closer to the actual temperature of the strip while maintaining the same total heat exchange amount. That is, for example, if it is a heating roll, the set temperature can be further lowered. Thereby, the stability of the composition of the belt-like body may be further improved.

  In short, according to the present invention, the same amount of heat can be exchanged with a smaller size, a smaller number, a lower set temperature, and a larger amount if the same size, the same number, and the same set temperature. A sharper temperature rise can be realized. Of course, these characteristics can be combined. That is, according to the embodiment, heat exchange control (temperature control of the band) having a higher degree of freedom than the conventional one can be easily realized according to the material of the band or the purpose of the temperature control to be performed. Can do.

  The present invention does not necessarily require that the position of the rotation axis of the sub-roll is variable. For example, in the case where the same belt-like body is manufactured continuously, (A) in FIG. As shown, the shortest distance Ms2 may be “fixedly” smaller than the roll diameter D2 of the heating roller 83 by using one sub-roll 80, 81 on each of the entry side and the exit side. Even in this case, the basic effect of the present invention of obtaining a contact angle θ2 exceeding 180 degrees can be easily obtained. The angles α1 and α2 on the entry side of the sub-roll 80 and the exit side of the sub-roll 81 may basically be arbitrary. For example, when the sub-rolls 80 and 81 themselves are sub-heat exchange rolls, It should be set appropriately because it affects the amount of heat exchange.

  Moreover, you may arrange | position the sub roll 86 only to the entrance side or exit side of the heat exchange roll 84 like FIG. 3 (B). In this example, it is arranged on the entry side, but the “shortest distance Ms3” when there is no sub-roll on one side is a length obtained by dropping a perpendicular from the side where the sub-roll 86 exists to the side where it does not exist. As long as the shortest distance Ms3 is shorter than the roll diameter D3, a contact angle θ3 of more than 180 degrees can be obtained, and the intended effect of the present invention can be obtained.

  Further, the present invention can be effectively applied even when a plurality of heat exchange rolls exist. Furthermore, even when a heating roll and a cooling roll are mixed as a heat exchange roll, it can be applied to each heat exchange roll. Further, the sub-roll itself may be constituted by a sub-heat exchange roll, that is, a heating roll that gives heat to the strip or a cooling roll that takes heat away from the strip. Thereby, the flexibility of control by combination can be remarkably increased. In any case, since the heat exchange rate with the strips of individual heat exchange rolls can be increased, the heat exchange rolls can be downsized, the production line can be downsized, and the cost can be reduced. .

12 Strip 14 Production Line 15 Heat Exchange Control Device 16 Heating Roll (Heat Exchange Roll)
36-39 Subroll Pc1 Path Change Mechanism

Claims (5)

A heat exchange control device for a production line of a belt-shaped body manufactured by transporting the belt-shaped body while being in rolling contact with a roll,
At least one of the rolls is configured with a heat exchange roll that heats the strip or removes heat from the strip;
A plurality of sub-rolls are arranged at a position where the shortest distance between the belt-like body on the entry side and the belt-like side on the heat exchange roll is smaller than the roll diameter of the heat exchange roll, and among the plurality of sub-rolls, at least one sub-roll is the production line of the strip, characterized in that with respect to the strip Ru movable der along the outer circumference of the provided Rutotomoni the heat exchanger roll on the side of the same with the heat exchange roll Heat exchange control device. In claim 1,
The shortest distance is variable,
A plurality of pairs of the plurality of sub-rolls are arranged so as to sandwich the belt-like body. A heat exchange control device for a production line of the belt-like body. In claim 1 or 2,
The shortest distance is variable in such a manner that the heat exchange roll can be exchanged. A heat exchange control device for a production line for a strip-shaped body. In claim 2 or 3,
A heat exchange control device for a production line for a strip-shaped body, wherein the sub-rolls are respectively arranged with respect to the strip-shaped body on the entrance side and the strip-shaped body on the exit side of the heat exchange roll. In any one of Claims 1-4,
The said sub roll is comprised with the sub heat exchange roll which can heat-exchange with a strip | belt body. The heat exchange control apparatus of the manufacturing line of a strip | belt body characterized by the above-mentioned.

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