JP5795945B2 - Ear processing apparatus and solution casting method - Google Patents

Description

  The present invention relates to an ear processing apparatus and a solution film forming method for separating and processing an ear portion having a predetermined width from a side edge portion while conveying a web.

  For the liquid crystal panel for image display, an optical functional film such as a protective film for a polarizing plate or a retardation compensation film for obtaining a wide viewing angle during image observation is used. These optical functional films are obtained by laminating a thin film having characteristics corresponding to a desired function on a transparent support as a base, such as TAC (cellulose triacetate).

  A solution casting method is known as a method for efficiently producing such an optical functional film. In the solution casting method, a polymer solution dope prepared by dissolving a polymer such as TAC in a mixed solvent containing dichloromethane or methyl acetate as a main solvent is prepared, and a casting bead is formed from a casting die to form a support. First, a cast film is formed. After the cast film has a self-supporting property on the support, it is peeled off as a film (wet film) from the support, dried and then wound up as a film (web) to obtain a product roll.

  The optical functional film thus obtained is imparted with various optical properties according to the application by being subjected to various treatments during the process. However, because the thickness and optical characteristics are unstable at the side edge of the film, the film is manufactured wider than the product width at the time of film formation, and the side edge portion is cut into a certain width during the process. It is normal to cut.

  The edge-cutting process is generally performed by separating the both end portions of the web into strips with a certain width with a rotary cutter while conveying the web. The ears separated from the web may be disposed of depending on the type. However, in the ear processing apparatus provided in the solution casting equipment described above, the separated ears are collected and finally collected. Is also considered to be recycled as a raw material.

  For example, the ear processing apparatus known from Patent Document 1 has a structure in which an air flow by a blower is steadily generated in a duct and a band-like ear guided to the duct inlet is aired downstream. ing. The belt-like ear portion is blown through the duct to the downstream rotary cutter, where it is cut into strips and further blown to the downstream collection path. As described above, the device described in Patent Document 1 handles the ear part separated from the web in a strip shape so that the ear part can be easily fed and recycled so that the ear part can be handled with little human labor. It has the great advantage of being able to process continuously and recover raw materials efficiently.

JP 2003-291091 A

  However, the above-mentioned ear processing device may cause a problem when the width of the ear that is separated from the side edge of the web is changed, and continuous processing may be interrupted. The width of the ear part is determined according to the total width of the web and the product width, but when the width of the ear part is changed, the band-like ear part is cut just before the introduction port or the band-like ear part is entangled. Therefore, there is a problem that clogging occurs in the duct and the air cannot be sent to the cutter for fragmentation. If such a problem occurs, it cannot be recovered unless the web conveyance is stopped, and the production efficiency is significantly reduced. Moreover, this problem occurs both when the ear is changed from wide to narrow or from narrow to wide, and an improvement measure is desired.

  The present invention has been made in view of the above background, and an ear processing device that is further fragmented after the side edge of the web is cut into a band having a predetermined width and can be efficiently recovered by air blowing. Even when the cut-out width of the part is changed, an ear part processing device that can be continuously fragmented and sent to the collection path without breaking the band-like ear part and clogging in the duct The purpose is to provide.

When the present invention achieves the above object, the trouble that the band-like ear portion breaks before the duct inlet or is clogged inside the duct is caused by the width of the ear portion introduced into the duct. Focusing on the fact that the speed of the airflow inside is not appropriate, the speed of the airflow inside the duct is changed when the width of the ear portion is changed.
The ear part processing apparatus of the present invention includes an ear clip part that cuts the ear part into a belt-like shape from the side end part of the conveyed web, and an ear width change part that can change the width of the ear part cut by the ear cut part in at least two stages. , Equipped with an introduction port into which the cut-out ears are introduced, and a duct for guiding the ears introduced into the introduction port to the recovery path through a cutter for fragmentation, and an air flow is generated inside the duct The blower that sends the ear part introduced into the introduction port to the cutter and blows the ear part cut by the cutter toward the recovery path, and the width of the ear part separated by the ear cut part is changed to be wide. And an air-feeding control unit that slows the airflow speed when the airflow is changed and increases the airflow speed when the airflow is changed to a narrow width.

It is desirable to have an ear width detecting means for detecting the width of the ear part between the ear cut part and the introduction port. For example, the ear width detecting means is a full width measuring means for measuring the full width of the web before the ear is cut, a cutting position measuring means for measuring the cutting position of the ear based on the position of the cutting blade of the ear cutting device, It is desirable to provide. Alternatively, the ear width detection means measures the position of the ear part separation based on the position of the ear end position measuring means for measuring the position of the end of the ear part after the ear part has been cut off and the cutting blade of the ear clip device. And a cutting position measuring means. Or, ear width detecting means preferably comprises a lug portions across the position measuring means to measure the both end positions of the ears after the ears are cut off.

  It is desirable to provide a pair of feed rollers between the introduction port in the duct and the cutter so as to sandwich the ear portion introduced into the duct and supply it to the cutter. The cutter is preferably a rotary cutter.

  In order to achieve the above object, the solution casting method of the present invention comprises a film forming step of flowing a dope containing a polymer and a solvent to a support and forming a cast film composed of the dope, and a solvent from the cast film. The film drying step for evaporating, the peeling step for peeling the casting film from the support to form a web, the separating step for separating the web ears, and the ears separated using the ear processing device of the present invention And an ear processing step for processing and recovering.

  Since the ear part processing apparatus of the present invention controls the speed of the airflow according to the width of the ear part, the band-like ear part is not broken even when continuously processing the ear part whose width has been changed. In addition, it can be continuously stripped and sent to the collection path without clogging the duct.

It is a top view which shows the outline of the solution casting method of this invention. It is the schematic which shows the ear | edge part processing apparatus of this invention, and the process of the vicinity. It is the schematic about the ear | edge part fragmentation part and collection | recovery path among the ear | edge part processing apparatuses of this invention. It is the schematic of the ear | edge part processing apparatus in 1st Embodiment which concerns on this invention. It is the schematic of the airflow control part and the ear | edge width change part of the ear | edge part processing apparatus in 1st Embodiment concerning this invention. FIG. 6 is a cross-sectional view taken along line AA ′ in FIG. 5. It is a flowchart of the wind control part of the ear | edge part processing apparatus in 1st Embodiment which concerns on this invention. It is the schematic of the ventilation control part and the ear | edge width change part of the ear | edge part processing apparatus in 2nd Embodiment which concerns on this invention. It is the schematic of the ventilation control part and the ear | edge width change part of the ear | edge part processing apparatus in 3rd Embodiment which concerns on this invention. It is a flowchart of the wind control part of the ear | edge part processing apparatus in 3rd Embodiment which concerns on this invention. It is the schematic of the ear | edge part processing apparatus in 4th Embodiment which concerns on this invention. It is the schematic of the ear | edge part fragmentation part of the ear | edge part processing apparatus in 4th Embodiment which concerns on this invention. The result of an Example is plotted on the log-log graph which took the width [mm] of the ear | edge part on the horizontal axis | shaft, and took the wind speed [m / s] in a duct on the vertical axis | shaft.

(Solution casting equipment)
As shown in FIG. 1, the solution casting apparatus includes a casting apparatus 15 that creates a wet film 13 from a dope 12, a clip tenter 17 that obtains a film 16 by drying the wet film 13, and a drying that dries the wet film 13. The film-forming line 10 which has the apparatus 18, and the winding apparatus 19 which winds up the film 16 on a winding core are included.

  As shown in FIG. 1, the casting apparatus 15 includes a casting die 21 that flows out of the dope 12, a horizontal roll 22 that is arranged substantially horizontally, and an annular casting band 23 that is wound around the horizontal roll 22. And stripping roller 24. With respect to the circulation direction of the casting band 23, the casting die 21 is installed near the upstream portion, and the peeling roller 24 is installed near the downstream portion. The dope outlet of the casting die 21 is directed to the casting band 23. Further, at least one of the horizontal rolls 22 is rotated around a shaft by a roll driving motor (not shown), and the casting band 23 is circulated accordingly.

  The dope 12 flows out from the casting die 21 to the casting band 23, the dope is semi-dried on the casting band 23, and the wet film 13 is formed on the casting band 23. The wet film 13 is peeled off from the casting band 23 by the peeling roller 24. In addition, although the installation position of the casting die 21 is set above the horizontal roll 22 as illustrated, the present invention is not limited to this.

  As shown in FIG. 1, a plurality of conveying rollers 28 that support the wet film 13 are arranged in the transition portion 27 between the casting device 15 and the clip tenter 17. The conveyance roller 28 is rotated around an axis by a motor (not shown). The transport roller 28 supports the wet film 13 fed from the casting device 15 and guides it to the clip tenter 17. Although FIG. 1 shows a case where two transport rollers 28 are arranged in the transition section 27, the present invention is not limited to this, and one or three or more transport rollers 28 are arranged in the transition section 27. Also good. Further, the transport roller 28 may be a free roller.

  The clip tenter 17 has a number of clips that grip both side edges of the wet film 13 in the width direction, and these clips move on the stretching track. Dry air is sent to the wet film 13 held by the clip, and the wet film 13 is subjected to a drying process as well as a stretching process in the width direction.

  An ear clip device 30 is provided between the clip tenter 17 and the drying device 18. At both ends in the width direction of the film 16 sent to the ear-cutting device 30, grip marks formed by clips are formed. The ear clip device 30 cuts off both end portions having the grip marks. The separated ear part 16C is sent to the ear part processing recovery part 32A. The ear process collection unit 32A is substantially the same as the ear process collection unit 32B described later, and details will be described later in the ear process collection unit 32B.

  The drying device 18 includes a casing having a conveyance path for the film 16, a plurality of rollers 18 a that form the conveyance path for the film 16, and an air conditioner (not shown) that adjusts the temperature and humidity of the atmosphere in the casing. The film 16 introduced into the casing is conveyed while being wound around the plurality of rollers 18a. By adjusting the temperature and humidity of the atmosphere, the remaining solvent evaporates from the film 16 conveyed in the casing. Further, an adsorption recovery device for recovering the solvent evaporated from the film 16 by adsorption is connected to the drying device 18.

  Between the drying device 18 and the winding device 19, a cooling chamber 37, a charge removal bar (not shown), a knurling device 38, and an ear clip device 30 are provided in this order from the upstream side. The cooling chamber 37 cools the film 16 until the temperature of the film 16 reaches approximately room temperature. The neutralization bar is sent out from the cooling chamber 37 and performs a neutralization process for removing electricity from the charged film 16.

  As shown in FIG. 2, the strip-shaped film 16 manufactured by the film forming line 10 is conveyed to a knurling apparatus. In the knurling device 38, a knurling roller 38A is installed. The knurling application roller 38 </ b> A applies a knurling 16 </ b> B for winding to both ends of the film 16 in the width direction. The edge-cutting device 30 is a device that cuts the strip-shaped ear portion 16C from the film 16, and is provided with a cutter 39 composed of an upper round blade 39A and a lower round blade 39B. The side surface of the blade portion of the upper round blade 39A and the side surface of the groove portion of the lower round blade 39B rotate in opposite directions, so that a shearing stress is generated between the knurling 16B of the film 16 and both ends 16A in the width direction. The portions at both ends 16A in the width direction are cut out from the film 16 as band-like ear portions 16C.

As shown in FIG. 1, the winding device 19 includes a press roller 19a and a winding core 19b. The film 16 sent to the winding device 19 is wound around the winding core 19b while being pressed by the press roller 19a, and becomes a roll.
(Ear part collection department)

  As shown in FIG. 3, the ear portion 16 </ b> C is introduced into an ear portion processing recovery portion 32 </ b> B that continuously strips the ear portion 16 </ b> C and sends it to the recovery path. The ear process recovery unit 32B includes an ear segmentation unit 33 that continuously strips the ear part 16C and a recovery path 34 that blows air to the silo 46. The ear process recovery unit 32A is also described above. It has the same configuration. The ear segmentation section 33 includes an introduction port 42 through which the ear section 16C is introduced, and a duct that leads to the recovery path 34 via a rotary cutter 44 that segments the ear section 16C into a strip-shaped ear section 16D. 43 is provided.

  The same processing path is provided for each of the ear portions 16 </ b> C cut out from both ends of the film 16. In the ear segmentation unit 33, the processing path is divided into two, but is converged to one path at the recovery path 34.

  In the collection path 34, a silo 46 that finally collects the ear part, two silencers 47, a blower 48 having air feeding means, a separator 49 that separates the strip-like ear part 16 </ b> D from the air, and a strip-like ear part 16 </ b> D. A crusher 50 for reducing the size of the pipe is provided. The pipes 51 are connected to form a duct. The pipe 51 is provided with a sampling pipe 51A used for various inspections and evaluations of the strip-shaped ear portion 16D, shutters 53 and 53A for controlling the airflow in the pipe 51, and a filter 54. Instead of the blower 48, it is preferable to use a cut blower having means for cutting the strip-shaped ear portion 16D into smaller pieces in addition to the air feeding means.

(Ear processing device)
1st Embodiment of the ear | edge part processing apparatus which concerns on this invention is described using FIGS. The ear processing device includes an ear-cleaving device 30 that separates the width-direction end portions 16A from the film 16 as a band-shaped ear portion 16C, an ear width changing portion 36 that can change the width of the ear portion 16C in at least two stages, An inlet 42 into which the portion 16C is introduced, a duct 43 that guides the ear portion 16C introduced into the inlet 42 to the recovery path 34 via the rotary cutter 44, and an air flow is generated inside the duct 43, thereby introducing the inlet The blower 48 that sends the ear portion 16C introduced to 42 to the rotary cutter 44 and winds the strip-like ear portion 16C toward the recovery path 34, and the air sending control unit that controls the air velocity according to the width of the ear portion. 35. Note that FIG. 4 illustrates the ear segmentation unit 33 related to the ear process recovery unit 32B, but the same applies to the ear process recovery unit 32A, and thus the description of the ear process recovery unit 32A is omitted. To do.

  As shown in FIG. 4, the ear segmentation section 33 includes guide rollers 62 and 63 and a guide plate 64 that transport the ear section 16 </ b> C cut out from the ear clip device 30 toward the inlet 42 of the duct 43, and the ear section. A feed roller pair 56 that sandwiches 16C and conveys it toward the rotary cutter 44, and a rotary cutter 44 that cuts the ear portion 16C. The rotary cutter 44 and the feed roller pair 56 are provided inside a duct 43 to which a blower 48 having an air feeding facility is connected.

  The feed roller pair 56 includes a first feed roller 56A that supports the surface of the ear portion 16C and a second feed roller 56B that supports the back surface of the ear portion 16C, and the second feed roller 56B holds the ear portion 16C. A shift portion 57 that is moved between the pinching release positions that retreat from the position and the pinching position and release the pinching of the ear portion is electrically connected. The rotary cutter 44 includes a rotary blade 59 and a fixed blade 60, and cuts the tip of the ear portion 16C sandwiched between the feed roller pair 56 to form a strip-like ear portion 16D. The first feed roller 56A may be electrically connected to the shift portion 57 instead of the second feed roller 56B, and both the first and second feed rollers are electrically connected to the shift portion 57. It does not matter.

(Ear width change part)
As shown in FIGS. 5 and 6, the ear width changing unit 36 includes a sensor 66 </ b> A that detects the position of the upper round blade 39 </ b> A in the Y direction, a driving unit 68, and a control unit 70 that controls them. The sensor 66A and the drive unit 68 are electrically connected to the control unit 70, and the upper round blade 39A is electrically connected to the drive unit 68. The drive unit 68 not only has a function of moving in the width direction Y of the belt-like film 16 in order to change the width of the ear part 16C, but also has an upper round blade 39A and a lower round blade 39B to cut out the ear part 16C. It also has the function of rotating in conjunction.

(Air transport control unit)
As shown in FIGS. 5 and 6, the air sending control unit 35 includes a sensor 66 </ b> A that detects the position of the upper round blade 39 </ b> A in the Y direction and the Y direction on the web side end side after the strip-shaped ear portion 16 </ b> C is cut off. Sensor 66 </ b> B that detects the end position of the ear portion, and a control unit 70. The sensors 66A and 66B are electrically connected to the control unit 70. Here, the control unit 70 performs not only the control of the ear width changing unit 36 but also the control of the air sending control unit 35, but the present invention is not limited to this. The sensors 66A and 66B have a shape that extends long in the film width direction. The control unit 70 has a function of calculating the width of the ear part 16C from the position of the upper round blade 39A and the end part position of the ear part 16C detected by the sensors 66A and 66B, respectively. The control unit 70 is connected to the blower 48 and controls the intake of the blower 48 so as to control the velocity of the airflow in the duct 43 according to the calculated width of the ear.

  Next, the operation of the present invention will be described. The belt-like film 16 formed and dried by the film forming line 10 is given a knurling 16B by a knurling device 38. Thereafter, in the edge cutting device 30, shear stress is applied by the upper round blade 39A and the lower round blade 39B at the boundary between the knurling 16B of the film 16 and both ends 16A in the width direction, and the ear portion 16C is cut out. The width of the ear portion 16C at this time is always controlled by the ear width changing unit 36 according to the product width, and the air flow control unit 35 controls the airflow speed of the duct 43 according to the width of the ear portion. The intake of the blower 48 is controlled.

  As shown in the flowchart of FIG. 7, the air sending control unit 35 according to the present embodiment includes a side edge position measurement process S <b> 1 that measures the position of the side edge with respect to the film 16 and the ear part 16 </ b> C that pass through the ear clip device 30. The cutting position measurement process S2 for measuring the position of the upper round blade 39A provided in the ear clip device 30, the ear width calculation process S4 for calculating the width of the ear part 16C from the information obtained by S1 and S2, and S4 The airflow speed deriving process S5 for deriving the optimum airflow speed in the duct 43 from the information obtained by the above, and the airflow speed changing process S7 for changing the airflow speed in the duct 43 so as to be the airflow speed derived in S5. And having.

  A side edge position measurement process S1 is performed by the sensor 66B, a cutting position measurement process S2 is performed by the sensor 66A, and an ear width calculation process S4 is performed in the control unit 70 to which the sensors 66A and 66B are connected. Further, in the control unit 70, an airflow velocity deriving process S5 is performed, and an airflow velocity in the duct 43 that is optimal for the calculated width of the ear portion is derived. Then, when the airflow speed changing process S7 is performed in the control unit 70 so as to be the airflow speed derived in S5, and the width of the ear portion 16C is changed, the airflow velocity in the duct 43 according to the width of the ear portion 16C. It is possible to change.

  For example, when an instruction to change the product width of the film is issued to the ear-cutting device through the control unit 70 during operation of the solution casting apparatus, the control unit 70 includes the upper round blade 39A and the lower round blade 39B. The cutter 39 moves in the Y-axis direction perpendicular to the traveling direction X of the film 16 toward the appropriate position. The ear cut position detection process S2, the ear width calculation process S4, the duct internal wind speed derivation process S5, and the duct internal wind speed change process S7 are sequentially performed, and the wind speed in the duct 43 is also moderated to correspond to the movement of the cutter 39. Changed to

  In the ear processing apparatus according to the present invention, the width of the ear corresponding to some specific product widths and the optimum air flow velocity are set in the control unit 70 in advance, and the change between the specific product widths can be performed. If so, the cutter 39 composed of the upper round blade 39A and the lower round blade 39B moves according to a predetermined program, and the wind speed in the duct 43 is changed according to the almost predetermined program. It doesn't matter.

  The ear portion 16 </ b> C introduced into the duct 43 by the duct port 42 is sandwiched by the feed roller pair 56, and the tip portion thereof is cut into a 100 mm strip shape by the rotary cutter 44. The strip-shaped ear portion 16D is introduced into the silencer 47 through the recovery path 34 and is sent to the blower 48 having an air feeding means. Further, it is sent to the separator 49, the strip-shaped ear portion 16D is separated from the air, and the strip-shaped ear portion 16D separated from the air is sent to the crusher 50 and cut into pieces. The finely cut ears are collected in the silo 46 and reused as a raw material for dopes and the like.

  Therefore, when changing the product width without stopping casting using the same solution casting apparatus, the intake control unit 35 applies the ear 16C to the ear 16C that has been sent out from the ear clip device 30. Depending on the width of the portion 16C, the airflow speed in the duct 43 can be appropriately changed to an optimum speed. Therefore, this ear processing apparatus continuously does not break the band-shaped ear 16C and does not clog the duct 43 even when the ear 16C having a changed width is continuously processed. Thus, it can be cut into pieces and sent to the collection path 34.

  A second embodiment of the ear processing apparatus according to the present invention will be described with reference to FIG. 1 to 4 and 6 and 7 are the same as those in the first embodiment, and a description thereof will be omitted. As shown in FIGS. 4 and 8, the air sending control unit 35 includes a sensor 66A that detects the position of the upper round blade 39A, a sensor 66C that detects the web side end position before the strip-shaped ear portion 16C is cut off, And a control unit 70. In the present embodiment, as compared with the first embodiment, the sensor 66B is replaced with a sensor 66C. The sensor 66C has a shape extending long in the film width direction, like the sensor 66A. When the same processing as that of the first embodiment is performed and the width of the ear portion 16C is changed, the airflow speed in the duct 43 can be appropriately changed to an optimum speed according to the width of the ear portion 16C. Therefore, this ear processing apparatus continuously does not break the band-shaped ear 16C and does not clog the duct 43 even when the ear 16C having a changed width is continuously processed. Thus, it can be cut into pieces and sent to the collection path 34.

  A third embodiment of the ear processing apparatus according to the present invention will be described with reference to FIGS. 1 to 4 and 6 are the same as those in the first embodiment, and a description thereof will be omitted. As shown in FIGS. 4 and 9, the air sending control unit 35 includes a sensor 66 </ b> D that detects the positions of both ends of the ear part after the strip-shaped ear part 16 </ b> C is cut off, and a control unit 70. This embodiment is an embodiment in which the functions of the sensors 66A and 66B are combined with one sensor 66D as compared with the first embodiment. The sensor 66D has a shape extending long in the film width direction, like the sensors 66A and 66B.

  As shown in the flowchart of FIG. 10, the air sending control unit 35 in the present embodiment measures both end positions of the ears with respect to the film 16 and the ears 16 </ b> C that pass through the ear clip device 30. S3, an ear width calculation process S4 for calculating the width of the ear 16C from the information obtained in S3, an airflow speed derivation process S5 for deriving an airflow speed in the duct 43 from the information obtained in S4, and S5 The airflow speed changing process S7 for changing the airflow speed in the duct 43 so as to be the airflow speed derived by. In the present embodiment, as compared with the first embodiment, the side edge position measurement process S1 and the ear cutting position measurement process S2 are replaced with an ear end position measurement process S3.

  The both-end position measurement process S3 is performed by the sensor 66D, and the ear width calculation process S4 is performed in the control unit 70 to which the sensor 66D is connected. The processes of S5 and S7 are performed in the same manner as in the first embodiment, and when the width of the ear portion 16C is changed, the air flow velocity in the duct 43 is appropriately changed to an optimum speed according to the width of the ear portion 16C. can do. Therefore, this ear processing apparatus continuously does not break the band-shaped ear 16C and does not clog the duct 43 even when the ear 16C having a changed width is continuously processed. Thus, it can be cut into pieces and sent to the collection path 34.

  A fourth embodiment of the ear processing apparatus according to the present invention will be described with reference to FIG. 1 to 3 and FIGS. 5 to 7 are the same as those in the first embodiment, and a description thereof will be omitted. In the present embodiment, an ear-cut unit 72 is installed instead of the ear-cut device 30. In the edge-cutting unit 72, a cutter 39 composed of an upper round blade 39A and a lower round blade 39B for cutting both ends in the width direction of the film 16, and a case 72A and an ear portion 16C for separating the conveyance path of the film 16 and the ear portion 16C hang down. And an outlet 72B.

  As shown in FIG. 11, in the ear segmentation section 33, the feed roller pair 56 that sandwiches the ear section 16C is disposed directly under the outlet 72B of the ear clip unit 72, and the rotary cutter 44 that cuts the ear section into a strip shape. Is disposed below the feed roller pair 56.

  Between the outlet 72B and the feed roller pair 56, there are provided a fixed roller 75 and a movable roller 76 that bend the introduction path of the ear portion while supporting the ear portion 16C on the peripheral surface. The fixed roller 75 is provided above the movable roller 76, and the fixed roller 75 is provided on the opposite side of the lower round blade 39 </ b> B through the introduction path of the ear portion 16 </ b> C. The movable roller 76 is electrically connected to a bending position for bending the introduction path of the ear part and a control unit 77 that moves between a bending release position that retracts from the bending position and releases the bending of the introduction path. The fixed roller 75 has a function of bending the introduction path of the ear portion while supporting the ear portion around the movable roller in a state where the movable roller is disposed at the bending position. Further, a sensor 74 for detecting the tip 16CE of the ear portion is provided between the feed roller pair 56 and the rotary cutter 44. The sensor 74 is electrically connected to the control unit 77.

  The ear portion 16C cut from the belt-like film 16 by the cutter 39 in the ear-cutting unit 72 is supported by the peripheral portion of the lower round blade 39B. Under the influence of its own gravity, the ear portion 16 </ b> C hangs down from the outlet 72 </ b> B toward the inlet 42 that is directly below, and is directly introduced into the duct 43. The ear tip 16CE passes between the first and second feed rollers 56A and 56B.

  As shown in FIG. 12A, when the tip 16CE of the ear is above the feed roller pair 56, it is in the upward state. When the ear tip 16CE passes between the first and second feed rollers 56A, 56B, the upper portion 16C shifts to the lower state where the ear tip 16CE is below the feed roller pair 56. The sensor 74 installed between the feed roller pair 56 in the duct 43 and the rotary cutter 44 during the period from the transition to the lower state until the ear tip 16CE reaches the rotary cutter 44. 16CE is detected.

  A signal is emitted from the control unit 77 to the shift unit 57 and the movable roller 76 according to the detection of the sensor 74. The shift unit 57 that has received the signal moves the second feed roller 56B from the nipping release position to the nipping position, and moves the movable roller 76 from the bending release position to the bending position. As a result, as shown in FIG. 12B, the arrangement of the rollers corresponding to the lower state is shifted.

  In the rotary cutter 44, the tip end portion of the ear portion 16C sandwiched by the feed roller pair 56 is cut into a 100 mm strip shape. The strip-shaped ear portion 16D is introduced into the silencer 47 by the ear portion collecting portion 34 and is sent to the blower 48 having the air feeding means. Further, it is sent to the separator 49, the strip-shaped ear portion 16D is separated from the air, and the strip-shaped ear portion 16D separated from the air is sent to the crusher 50 and cut into pieces. The finely cut ears are collected in the silo 46 and reused as a raw material for dopes and the like.

  Therefore, when the tip of the ear portion 16C is cut by the rotary cutter 44, the ear portion 16C can always be stably held by the feed roller pair 56. In addition, the guide roller for wrapping to stabilize the ear portion is not used, and the introduction path of the ear portion 16C is formed only by the fixed roller 75 and the movable roller 76 using the free fall due to gravity. The phenomenon that the part breaks can be reduced. Therefore, the strip-shaped ear portion 16 </ b> D can be more reliably aired and collected by the collection path 34. Here, the ear fragmentation unit 33 related to the ear process recovery unit 32B has been described. However, the same applies to the ear fragmentation unit 33 related to the ear process recovery unit 32A, and the description thereof will be omitted.

  A fixed roller 75 that has a lower round blade 39B that supports the ear portion 16C just above the outlet 72B, and is disposed at a position closest to the outlet among the fixed roller 75 and the movable roller 76, provides an introduction path for the ear portion. Since it is arrange | positioned on the opposite side of the lower round blade 39B via, it can be bent so that the introduction path | route of an ear | edge part may be stabilized. Further, since the movable roller 76 is disposed on the opposite side of the fixed roller 75 via the ear introduction path, the movable roller 76 can be bent so as to stabilize the ear introduction path.

  Since the ear portion 16C tends to bend with the back surface inside, it is desirable that the second feed roller 56B is electrically connected to the shift portion 57 rather than the first feed roller 56A. By retracting the second feed roller 56B in the upward state, the tip 16CE of the ear portion can be passed between the first and second feed rollers 56A and 56B more reliably.

  Further, the fixed roller 75 or the movable roller 76 moves in a direction to reduce the bending of the introduction path of the ear when the tension of the ear between the outlet and the feed roller pair increases, and the ear when the tension decreases. It is desirable to use a roller that adjusts the tension by moving in the direction of increasing the bending of the introduction path. For example, a dancer roller or the like can be used.

  The air sending control unit 35 in the present embodiment can use any of the air sending control units 35 in the first to third embodiments. In this case, similarly to the first to third embodiments, when the width of the ear portion 16C is changed, the airflow velocity in the duct 43 can be appropriately changed to an optimum speed according to the width of the ear portion 16C. . Therefore, this ear processing apparatus continuously does not break the band-shaped ear 16C and does not clog the duct 43 even when the ear 16C having a changed width is continuously processed. Thus, it can be cut into pieces and sent to the collection path 34.

  Although the movable roller and the fixed roller are provided in the fourth embodiment, the movable roller and the fixed roller may not be provided. Of course, it is desirable to provide a movable roller or a fixed roller. Providing a movable roller or fixed roller can more securely pinch the ears near the rotary cutter and at the same time further reduce the phenomenon of the ears breaking and wrapping around the transport roller. Can be sent and collected. In the first to third embodiments, only a maximum of two movable rollers and fixed rollers are provided, but any number may be provided.

  When shifting from the upper state to the lower state, the arrangement of the movable roller, the fixed roller, and the feed roller pair is automatically shifted by the sensor 74 and the control unit 77, but it may be manually operated. Of course, it is desirable to control the automatic transition.

  Note that the present invention is not limited to this, and the design may be changed as appropriate as long as the ear processing apparatus and the solution casting method have the same technical idea.

  Next, examples of the present invention will be described. This example was performed in the same ear processing apparatus as the first embodiment based on FIGS. The size of the rollers such as the guide rollers 62 and 63 or the feed roller pair 56 is 50 mmφ, and the pipes 43 and the recovery passage 34 are pipes having a diameter of approximately 165.2 mm (corresponding to a nominal diameter of 150 A). The conditions of the web 16 to be continuously conveyed were a width of 2 m, a thickness of 40 μm, a conveyance speed of 10 m / min, and a web tension in the roller conveyance unit of 10 N / m.

In this embodiment, the width of the ear portion and the air flow velocity in the duct 43 are varied, and the trouble in the process that the ear portion 16C breaks and winds around the guide rollers 62, 63 or the feed roller pair 56 occurs. The processability of the ears was evaluated according to the following criteria by the processing length of the ears until the ears could not be processed halfway, such as when the ears were clogged with the duct 43 or the ears were broken.
1. Ear processability evaluation ◎: Ear processing length of 3000 km or more ○: Ear processing length of 1000 km or more and less than 3000 km Δ: Ear processing length of 500 km or more and less than 1000 km ×: Ear processing length of less than 500 km From the viewpoint of productivity, in order to use the ear processing apparatus according to the present invention in an actual ear processing process, it is necessary to evaluate “◯” or “◎” in the examples.

  In this example, the width of the ear portion was varied to three levels of 40 mm, 200 mm, and 600 mm, and the air velocity in the duct 43 was varied to four levels of 5 m / s, 10 m / s, 15 m / s, and 30 m / s. . In addition, in the case where the test was performed at a larger air velocity than the condition in which the ear portion 16C was broken, it is considered that the possibility of the ear portion breaking is extremely high. The above test on the air velocity in the duct 43 was not performed. The results of this example are shown in Table 1.

As shown in Table 1, a very good evaluation was obtained when the air velocity in the duct 43 was 15 m / s and 30 m / s when the width of the ear portion was 40 mm. Although good evaluation was obtained if the airflow velocity in the duct 43 was 10 m / s, there was a problem that the ear portion 16 </ b> C was clogged with the duct 43. Moreover, if the airflow velocity in the duct 43 was 5 m / s, there was a problem that the ear portion 16 </ b> C was clogged in the duct 43.
Moreover, when the width | variety of the ear | edge part was 200 mm, very good evaluation was acquired if the airflow speed in the duct 43 was 10 m / s. Although good evaluation was obtained if the airflow velocity in the duct 43 was 5 m / s, there was a problem that the ear portion 16 </ b> C was clogged with the duct 43. Moreover, if the air velocity in the duct 43 was 15 m / s, there was a problem that the ear portion 16C was broken. Therefore, the implementation was not performed at an air velocity of 30 m / s in the duct 43.
Also, when the width of the ear portion is 600 mm, a very good evaluation can be obtained if the air velocity in the duct 43 is 5 m / s, and only a reasonable evaluation can be obtained if the air velocity in the duct 43 is 10 m / s. First, there was a problem that the ear portion 16C was broken. Moreover, if the air velocity in the duct 43 was 15 m / s, there was a problem that the ear portion 16C was broken. Therefore, the implementation in the duct 43 at a speed of 30 m / s was not performed.

  As shown in FIG. 13, it was found that “◯” or “◎” is between the upper limit straight line Vmax and the lower limit straight line Vmin of the airflow velocity in the duct 43 with respect to the width of each ear. Vmax is expressed by Equation 1 and Vmin is expressed by Equation 2. However, the width of the ear was L. Further, a straight line V representing the air velocity in the duct 43 that divides the ◎ region and the ○ region is expressed by Equation 3.

As a result of the present embodiment, the air flow velocity in the duct 43 that can be processed without any trouble in the process such as the ear 16C breaking or the ear 16C clogging in the duct 43 with respect to the width L of the ear. Is greater than or equal to Vmin expressed in Equation 2 and less than or equal to Vmax expressed in Equation 1. If the airflow velocity is equal to or less than Vmin expressed in Equation 2, a problem in the process that the ear portion 16C is clogged in the duct 43 occurs. On the other hand, if the airflow velocity is equal to or greater than Vmax expressed in Equation 1, the ear It was found that there was a problem in the process that the part 16C was broken.
Even if the airflow velocity is equal to or less than V expressed in Equation 3, a problem in the process that the ear portion 16C is clogged in the duct 43 occurs. Therefore, the airflow velocity is preferably equal to or more than V expressed in Equation 3. I understood it.

16 Film 16A (Film) Width direction end 16B (On film) Knurling 16C Ear 16CE Ear tip 16D Strip ear 30 Ear clip device 32A, 32B Ear processing collection part 33 Ear fragmentation part 34 Collection Route 35 Air feed control unit 36 Ear width changing unit 39 Cutter 39A Upper round blade 39B Lower round blade 42 Inlet port 43 Duct 44 Rotary cutter 48 Blower 56 Feed roller pair 56A First feed roller 56B Second feed rollers 66A, 66B, 66C , 66D sensor 67 detection unit 68 drive unit 70 control unit S1 side end position measurement process S2 cutting position measurement process S3 ear end position measurement process S4 ear width calculation process S5 airflow speed derivation process S7 airflow speed change process

Claims (8)

Ear-cutting sections that cut the ears into strips from the side edges of the web being conveyed;
An ear width changing part capable of changing the width of the ear part separated by the ear cutting part in at least two stages;
A duct that introduces the ear part into which the ear part separated in a belt shape is introduced, and a duct that guides the ear part introduced into the introduction port to a recovery path via a cutter for fragmentation;
A blower that generates an air flow inside the duct, sends an ear portion introduced into the introduction port to the cutter, and blows an ear portion fragmented by the cutter toward the recovery path;
An air-feeding control unit that slows down the speed of the airflow when the width of the ear part cut off at the ear- cutting part is changed to a wide width, and speeds up when changed to a narrow width;
The ear | edge part processing apparatus characterized by the above-mentioned.   The ear part processing apparatus according to claim 1, further comprising an ear width detecting unit that detects a width of the ear part between the ear cut part and the introduction port. The ear width detecting means is a full width measuring means for measuring the full width of the web before the ear is cut off,
Cutting position measuring means for measuring the cutting position of the ear part based on the position of the cutting blade of the ear cutting device;
The ear | edge part processing apparatus of Claim 2 characterized by the above-mentioned. The ear width detection means is an ear end position measuring means for measuring the position of the ear end after the ear is cut off, and
Cutting position measuring means for measuring the cutting position of the ear part based on the position of the cutting blade of the ear cutting device;
The ear | edge part processing apparatus of Claim 2 characterized by the above-mentioned. The ear width detecting means, ears processing apparatus according to claim 2, characterized in that it comprises an ear portion both end positions measurement means to measure the both end positions of the ears after the ears are cut off.   The feed roller pair is provided between the introduction port in the duct and the cutter, and a feed roller pair is provided to sandwich and feed the ear portion introduced into the duct toward the cutter. The ear | edge part processing apparatus as described in any one.   The ear processing apparatus according to claim 1, wherein the cutter is a rotary cutter. A film forming step of flowing a dope containing a polymer and a solvent to a support and forming a cast film made of the dope; and
A film drying step of evaporating the solvent from the cast film;
A peeling step of peeling the cast film from the support to form a web;
A separation step of separating the ears of the web;
Using the ear processing device according to any one of claims 1 to 7, an ear processing step of processing and collecting the separated ear,
A solution casting method characterized by comprising:

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