JP6113110B2 - Crushing apparatus and method, and solution casting method - Google Patents

Description

  The present invention relates to a crushing apparatus and method for crushing an object to be processed such as a film, and a solution casting method.

  As the crusher, there are various crushing types. For example, a uniaxial crushing type is often used for crushing a film-like workpiece such as a film. The uniaxial crushing type crusher has a fixed blade fixed in the crushing chamber and a rotating blade attached to a rotating shaft, and crushes (cuts) a workpiece by sandwiching the workpiece between the fixed blade and the rotating blade. ) Moreover, in such a crusher, in order to prescribe | regulate the size of a crushing piece, the screen in which the hole of the size substantially the same as the size of the crushing piece made desired is arrange | positioned under the rotary blade. The object to be processed collected on the screen is scraped up by the rotation of the rotary blade, or rolled up and floated to repeat crushing. Thereby, only the crushed pieces crushed below the size of the screen holes are discharged through the screen holes.

  On the other hand, optical films such as polarizing plate protective films and retardation compensation films are used for liquid crystal panels. As a typical method for producing such an optical film, a melt film forming method and a solution film forming method are known. For example, in the solution casting method, a cast film is continuously formed by casting a polymer solution in which a polymer is dissolved in a solvent (hereinafter referred to as a dope) on a support. The cast film is initially dried until it can be peeled off from the support, and then peeled off from the support to form a film. The long film is formed into a final form through a stretching process, a drying process, a cutting process for obtaining a product width, and the like.

  The side part of the film (hereinafter referred to as the “ear part”) cut in the above-described cutting step is crushed into small pieces by a crushing apparatus and collected as a dope raw material. For example, the crushing processing apparatus (ear collection processing apparatus) described in Patent Document 1 includes first and second air pipes, first and second separators, a crusher (pulverizer), and a blower. The ear part cut off by the cutting device is blown to the first separator through the first blower pipe, and the wind and the ear part are separated by the cyclone method by the first separator. The ear portion as the object to be processed separated by the first separator is fed into the inside of the crusher from the inlet, and the ear portion is finely crushed by the crusher. The shredded pieces (hereinafter referred to as film chips) shredded by the crusher are blown to the second separator by the second blower pipe connected to the discharge port, and separated from the wind by the cyclone second separator. And collected in a collection container.

  The blower is provided in the middle of the second air pipe between the discharge port of the crusher and the second separator, sucks air in the second air pipe from the discharge port side of the crusher, Blower toward. Moreover, the pipe | tube which connects the part of the 2nd ventilation pipe between the discharge port of a crusher and an air blower and a 1st separator is provided, and the air in a 1st ventilation pipe sucks toward the 1st separator. Is done. As a result, the air blows the ears in the first blower pipe with one blower, and blows the film chip in the second blower pipe.

Japanese Patent Laid-Open No. 10-86097

  By the way, with the thinning and high functionality of liquid crystal panels and the like, thinner optical films are required. However, when an ear portion obtained by cutting a thin optical film, for example, a thin cellulose acylate film having a thickness of 40 μm or less, is sent to a crusher, there is a problem that the ear portion or a fragmented piece in the middle of crushing sticks to the screen. When such sticking to the screen occurs, there is a problem that even when the rotary blade rotates, the crushed pieces and the crushed pieces in the middle of the crushing are wound up from the screen and do not float, so that the crushing cannot be performed. Moreover, since the state in which the hole of the screen was blocked by the ear part or the crushing piece in the middle of crushing is not released, there is a problem that the load of the blower becomes excessive and causes a failure. Furthermore, when the crushing apparatus is provided in the facility for continuously producing the film as described above, it is necessary to stop the entire film production facility by stopping the crusher, which is a big problem.

  The present invention has been made in view of the above circumstances, and provides a crushing treatment apparatus and method capable of continuously crushing a film-like workpiece with a crusher, and a solution casting method using the same. With the goal.

The crushing processing apparatus of the present invention has a first air pipe into which a film-like object to be processed is introduced from an introduction port, and a blower that generates wind in the first air pipe, and the object to be processed is a first object. A first air sending system that sends air through an air sending pipe, a first separator that is connected downstream of the first air sending system and separates an object to be processed and wind conveyed by the first air sending system; An input port is connected to the separator, a crushing mechanism for crushing an object to be processed that is input from the input port into the crushing chamber, and a processing object that is disposed between the crushing mechanism and the discharge port and is preliminarily defined by the crushing mechanism a crusher which have a SCREEN which a plurality of holes are formed through the crushed pieces were crushed to less than or equal to the size the outlet side, is connected to the discharge port, a second Kazeokukan the crushed pieces from the discharge port is introduced Connected to the downstream side of the outlet of the second air pipe, and sucked from the outlet side to generate wind in the second air pipe. That has a suction unit, a second aeolian system for feeding air through the second air flue crushed pieces, and the outlet side of the crusher pressurized, the discharge port side from the pressure of the crushing chamber of the inlet A pressure adjusting blower that adjusts the pressure difference so as to reduce the pressure difference, and the blower is connected to the first blower pipe or the first separator and generates the wind from the inlet to the first separator. The pressure adjusting blower is connected upstream of the second air pipe from the discharge port in a direction of blowing air in the downstream direction .

The crushing processing apparatus of the present invention has a first air pipe into which a film-like object to be processed is introduced from an introduction port, and a blower that generates wind in the first air pipe, and the object to be processed is a first object. A first air sending system that sends air through an air sending pipe, a first separator that is connected downstream of the first air sending system and separates an object to be processed and wind conveyed by the first air sending system; An input port is connected to the separator, a crushing mechanism for crushing an object to be processed that is input from the input port into the crushing chamber, and a processing object that is disposed between the crushing mechanism and the discharge port and is preliminarily defined by the crushing mechanism. A crusher having a screen formed with a plurality of holes through which crushed pieces crushed to a size below the discharge port side, a second wind pipe connected to the discharge port and into which crushed pieces from the discharge port are introduced, It is connected downstream from the outlet of the second air pipe, and sucks from the outlet side to generate wind in the second air pipe. And a second air feeding system for airing the crushed pieces through the second air feeding pipe, and pressurizing the discharge port side of the crusher so that the pressure on the discharge port side A pressure adjusting blower that adjusts the pressure difference so as to reduce the pressure difference, and the blower is connected to the first blower pipe or the first separator and generates the wind from the inlet to the first separator. The pressure adjusting blower is characterized in that it blows air into the space of the crushing chamber between the discharge port in the crushing chamber and the screen.

In the pressure adjusting blower, it is preferable that the fluctuation range of the pressure difference is 0 Pa or more and 100 Pa or less .

  Based on the measurement results of the first sensor that measures the pressure on the inlet side in the crushing chamber, the second sensor that measures the pressure on the outlet side in the crushing chamber, and the first sensor and the second sensor, the pressure adjustment blower And a controller for controlling the driving of the motor.

  It is preferable that the crusher has a fixed blade fixed in the crushing chamber and a rotary blade attached to a rotating shaft, and crushes the workpiece by sandwiching the workpiece between the fixed blade and the rotary blade.

  The blower is a cut blower disposed in the middle of the first blower pipe. The first blower pipe is introduced with a long workpiece from the introduction port, and the first separator is cut with the cut blower. It is preferable to separate the workpiece from the wind.

In the crushing method of the present invention, a film-like object to be treated introduced into the first air pipe from the introduction port is blown through the first air pipe by the wind generated in the first air pipe by the blower. In a first air separation step, a first separation step in which an object to be conveyed conveyed by the first air blowing tube is separated from the wind by a first separator connected downstream of the first air blowing tube, and a first separation step. The separated object to be processed is thrown into the crushing chamber from the inlet of the crusher connected to the first separator and crushed, and crushed pieces obtained by crushing the object to be processed to a predetermined size or less are formed on the screen. A crushing process for discharging from the discharge port through a plurality of holes, and air in the second air pipe connected to the discharge port is sucked from the discharge port side by a suction machine to generate a downstream wind, a second aeolian step of feeding air through 2 wind flue, pressure crushing chamber inlet Have a, a pressurizing step of pressurizing a pressure regulating blower outlet side of the crusher in order to adjust so as to reduce the pressure difference obtained by subtracting the pressure of the outlet side from the blower is first Kazeokukan Or it is connected to the first separator and generates wind from the inlet to the first separator, and the pressure adjusting blower is connected upstream of the second air pipe from the outlet in a direction to blow in the downstream direction. It is characterized by being.
The crushing processing method of the present invention includes the first airing step, the first separation step, the crushing step, the second airing step, and the pressure step. The blower is connected to the first blower pipe or the first separator and generates a wind from the inlet to the first separator. The pressurizing step is a pressure adjusting blower, and the discharge port in the crushing chamber is connected to the screen. The discharge port side is pressurized by blowing air into the space of the crushing chamber in between.

The solution casting method of the present invention includes a casting step in which a casting film is formed by casting a dope on a casting surface of a traveling support, and a state in which the casting film can be peeled off from the support. Generated in the first air pipe by a blower, an initial drying process for drying the film, a peeling process for peeling the cast film dried in the initial drying process from the support as a film, a cutting process for separating the side of the film, and a blower Is connected to a downstream side of the first air pipe by a first air blowing step of air-feeding the film-like object to be processed introduced from the introduction port into the first air pipe through the first air pipe. A first separation step of separating the object to be processed conveyed by the first wind pipe by the first separator from the wind, and a crusher in which the object to be processed separated in the first separation step is connected to the first separator. The material to be processed is specified in advance by crushing it into the crushing chamber from the inlet. A crushing step of discharging the crushed pieces crushed below the size from the discharge port through a plurality of holes formed in the screen, and sucking the air in the second air pipe connected to the discharge port from the discharge port side by a suction device to generate wind facing downstream, the fragments and the second aeolian step of feeding air through the second air flue, so as to reduce the pressure difference obtained by subtracting the pressure of the outlet side from the pressure of the crushing chamber of the inlet the outlet side of the crusher possess a pressurizing step of pressurizing a pressure regulating blower, a to adjust blower is connected to the first wind flue or first separator, toward the first separator from the inlet The pressure adjusting blower is connected to the upstream side of the second blower pipe from the discharge port in a direction of blowing in the downstream direction.
The solution casting method of the present invention includes the casting step, the initial drying step, the stripping step, the cutting step, the first airing step, and the first separation. A blower is connected to the first blower pipe or the first separator, and is connected to the first inlet from the introduction port. A wind directed toward the separator is generated, and the pressurizing step pressurizes the discharge port side by blowing air to the space of the crushing chamber between the discharge port in the crushing chamber and the screen with a pressure adjusting blower. .

  According to the present invention, since the pressure adjusting blower for adjusting the pressure difference inside the crushing chamber sandwiching the screen of the crusher is provided, even if the object to be processed is a thin film or the like, Generation | occurrence | production of the phenomenon that the obstruction | occlusion of a hole is not cancelled | released can be prevented, and it can crush continuously.

It is explanatory drawing which shows the schematic of solution casting apparatus. It is a perspective view which shows a cutting device and a suction part. It is explanatory drawing which shows the structure of a crushing processing apparatus. It is explanatory drawing which shows the example which provided the pressure adjustment blower which ventilates in the space below the screen of a crushing chamber. It is explanatory drawing which shows the example which measures the pressure of a crushing chamber and controls a pressure adjustment fan. It is explanatory drawing which shows the example which provided the hole in the duct and was used as the separator.

[First Embodiment]
In FIG. 1, a solution casting apparatus 10 manufactures a cellulose acylate film (hereinafter simply referred to as “film”) 12 from a dope 11. The solution casting apparatus 10 includes a casting apparatus 14, a tenter 15, a drying chamber 16, a cutting apparatus 17, a winding apparatus 18, and a crushing apparatus 20. In the solution casting apparatus 10, a film 12 having a thickness of, for example, about 15 μm to 40 μm is manufactured.

The casting apparatus 14 forms the film 12 containing the solvent from the dope 11. The dope 11 is obtained by dissolving a polymer in a solvent. In this embodiment, the dope 11 is formed by dissolving cellulose acylate as a transparent thermoplastic polymer in a solvent. Among cellulose acylates, the present invention is particularly effective when TAC (cellulose triacetate) is used in which the substitution degree of the acyl group to the hydroxyl group of cellulose satisfies the following formulas (1) to (3). In the formulas (1) to (3), A and B represent the substitution degree of the acyl group with respect to the hydrogen atom in the hydroxyl group of cellulose, A is the substitution degree of the acetyl group, and B is the acyl having 3 to 22 carbon atoms. The degree of substitution of the group. The total acyl group substitution degree Z of cellulose acylate is a value determined by A + B.
(1) 2.7 ≦ A + B ≦ 3.0
(2) 0 ≦ A ≦ 3.0
(3) 0 ≦ B ≦ 2.9

The present invention is also particularly effective when using DAC (cellulose diacetate) in which the substitution degree of the acyl group to the hydroxyl group of cellulose satisfies the following formula (4) instead of or in addition to TAC. .
(4) 2.0 ≦ A + B <2.7

From the viewpoint of retardation wavelength dispersion, while satisfying the formula (4), the substitution degree A of the acetyl group of DAC and the total substitution degree B of the acyl group having 3 to 22 carbon atoms are represented by the following formula (5). It is preferable to satisfy (6) and (6).
(5) 1.0 <A <2.7
(6) 0 ≦ B <1.5

  The glucose unit having β-1,4 bonds constituting cellulose has free hydroxyl groups (hydroxyl groups) at the 2nd, 3rd and 6th positions. Cellulose acylate is a polymer obtained by esterifying some or all of these hydroxyl groups with an acyl group having 2 or more carbon atoms. The degree of acyl substitution means the ratio at which the hydroxyl group of cellulose is esterified at each of the 2-position, 3-position and 6-position (the substitution degree is 1 in the case of 100% esterification).

  The film 12 may be a thermoplastic polymer whose polymer component is transparent, for example, cellulose ester, polycarbonate polymer, polyester polymer such as polyethylene terephthalate or polyethylene naphthalate, acrylic polymer such as polymethyl methacrylate, and the like. Good. Further, the polymer component may not be transparent or thermoplastic.

  The casting apparatus 14 includes a casting band 21 as a support, a pair of backup rollers 22, 23, a casting die 24, a peeling roller 25, a chamber 26 in which these are accommodated, and the like. One of the backup rollers 22, 23, for example, the backup roller 22 is driven by a drive unit (not shown) and rotated counterclockwise. Due to the rotation of the backup roller 22, the casting band 21 circulates and the backup roller 23 is driven to rotate as the casting band 21 travels. The casting band 21 moves from a casting position described later to a stripping position and returns to the casting position again.

  The casting die 24 discharges the dope 11 onto the casting surface (outer peripheral surface) of the running casting band 21. Thus, the dope 11 is cast on the casting surface of the casting band 21 to continuously form the casting film 27 (casting process). The decompression chamber 26 depressurizes the back side of the dope 11 from the discharge port of the casting die 24 until it reaches the casting surface of the casting band 21, thereby vibrating and breaking the discharged dope. To prevent. In this example, the casting position is the position where the casting band 21 is wound around the backup roller 22, but it may be on the casting band 21 between the backup rollers 22 and 23.

  During the transfer of the casting film 27 by the casting band 21, initial drying is performed to advance the drying to such an extent that the casting film 27 can be peeled off from the casting band 21 (initial drying step). For this initial drying, a heater 29 for heating the casting film 27 is disposed along the conveyance path of the casting film 27. Further, the temperature of the casting film 27 is controlled via the backup roller 23 and the casting band 21 by supplying a heat transfer medium whose temperature is adjusted from a temperature controller (not shown) to the backup roller 23. Thus, the temperature of the casting band 21 is controlled so as to promote the evaporation of the solvent of the casting film 27, and the casting film 27 is solidified to a hardness that can be peeled off. The drying method is not limited to heating, and for example, air may be blown onto the casting film.

  In this embodiment, as described above, the initial drying of the cast film is a dry cast that is dried and solidified. Instead of this dry cast, a so-called cooling flow that cools and solidifies the cast film. It may be a total. In this case, the casting band 21 is cooled by supplying the cooled heat transfer medium to the backup rollers 22 and 23 so that the fluidity of the casting film 27 is lowered. Further, the casting support is not limited to the casting band 21. For example, instead of the casting band 21, a drum may be used, and the dope 11 may be discharged and cast onto the peripheral surface of the rotating drum. In the case of dry casting, a casting band 21 is often used, and in the case of cooling casting, a drum is often used. However, a drum may be used for dry casting, and a belt may be used for cooling casting. It doesn't matter. When the temperature of the casting film 27 is controlled using a drum as a casting support, the temperature of the peripheral surface of the drum may be lowered by flowing a cooled heat transfer medium through the drum.

  The stripping roller 25 strips the casting film 27 from the casting band 21 as the film 12 while maintaining the stripping position constant, and its rotational axis is arranged in parallel with the rotational axis of the backup roller 22. It is. In a state where the film 12 is wound around the peeling roller 25, the film 12 is pulled toward the downstream side of the solution casting apparatus 10, whereby the casting film 27 is peeled off from the casting band 21 at the peeling position (peeling off). Taking process). The film 12 is fed out of the chamber 26.

  In the chamber 26, a condenser (condenser) is disposed by condensing the solvent evaporated from each of the dope 11, the casting film 27, and the film 12 into a gas. The solvent liquefied by this condenser is sent to a recovery device and recovered. In addition, illustration of a condenser and a collection | recovery apparatus is abbreviate | omitted.

  The film 12 from the casting apparatus 14 is sent to the tenter 15. In this embodiment, the film 12 is directly supplied from the casting apparatus 14 to the tenter 15. For example, the film 12 is pulled out from a film roll wound up with a predetermined length of film 12 before stretching, and the tenter 15 or the like. You may supply to a post process.

  The tenter 15 is for stretching in the width direction orthogonal to the transport direction while transporting the film 12. In this stretching, a gas adjusted to various temperatures is blown onto the film 12. The film 12 stretched by the tenter 15 is sent to the drying chamber 16.

  The tenter 15 in this example is a clip tenter that stretches the film 12 in the width direction by moving a clip (not shown) holding both sides of the film 12 in the transport direction while widening the interval in the width direction. A pin tenter may be used. The pin tenter has a pin plate for penetrating and holding a plurality of pins on the side of the film 12, and the pin plate as a holding member moves to stretch the film 12 in the width direction.

  The drying chamber 16 is supplied with heated dry air. The film 12 from the tenter 15 is conveyed in a meandering manner in the drying chamber 16 by a plurality of rollers. During the conveyance in the drying chamber 16, the film 12 is further dried. The winding device 18 winds the dried film 12 in a roll shape. A cooling chamber for cooling the film 12 may be provided following the drying chamber 16. Examples of the cooling chamber include those supplied with dry air of about room temperature (for example, 15 to 35 ° C.).

  The cutting device 17 is disposed between the drying chamber 16 and the winding device 18. The cutting device 17 removes the trace of the grip of the tenter 15 and simultaneously cuts and separates both sides of the film 12 in order to make the film 12 a product width (cutting process). Both sides cut by the cutting device 17 are sent to the crushing device 20.

  In addition, before stretching by the tenter 15, the both sides of the film 12 which has been sufficiently dried and stretched by the tenter 15 may be cut before stretching by the tenter 15. You may send the both sides of the film 12 cut before this extending | stretching to the crushing processing apparatus 20, and may process it.

  As shown in FIG. 2, the cutting device 17 is disposed at each of the cutting positions on both sides of the conveyance path of the film 12. The cutting device 17 includes a rotating upper blade 17a and a lower blade 17b, and both sides of the film 12 are continuously cut by the upper blade 17a and the lower blade 17b. The central portion of the film 12 cut on both sides is sent to the winding device 18. Further, each side part (hereinafter referred to as an ear part) F0 cut off from the central part of the film 12 is guided by a guide roller and sent to the suction part 31 of the crushing processing apparatus 20. Since the cutting device 17 continuously cuts the long film 12, the ear portion F0 is long.

  The suction part 31 has a hollow box shape in which a suction port 31a is formed on the upper surface, and one end of the first air pipe 33 is disposed therein. The first blower pipe 33 is provided in a state where an opening as an introduction port at one end thereof faces the suction port 31a. A suction force is generated in the suction port 31a by the suction of the cut blower 45 (see FIG. 3), and the ear portion F0 is introduced from the suction port 31a through the opening at one end into the first blower pipe 33 together with the air.

  As will be described later, the air used for airing the ear F0 is collected and supplied downstream to the air supply port 31b provided in the suction unit 31. The air supplied to the air supply port 31 b passes through the space between the suction portion 31 and the first air feed pipe 33, and passes through the slit 31 c provided around the opening of the first air feed pipe 33 to generate the first wind. It flows into the pipe 33.

  As shown in FIG. 3, the crushing apparatus 20 includes first and second air sending systems 36 and 37, first and second separators 38 and 39, a crushing machine 41, a silo 42, a pressure adjusting blower 43, and the like. Crushing is performed using the ear F0 as an object to be processed.

  The first air sending system 36 sends the ear F0 from the suction part 31 to the first separator 38. The first blower system 36 includes the first blower pipe 33 described above and a cut blower 45 provided in the middle of the first blower pipe 33. The first blower pipe 33 includes a blower pipe 33a on the upstream side (suction part 31 side) in the blower direction with respect to the cut blower 45, and a blower pipe on the downstream side (first separator 38 side) with respect to the cut blower 45. 33b.

  The air pipe 33 a is bifurcated on the suction part 31 side, and is assembled in a state where one end of each is inserted into the suction part 31. The other end of the air pipe 33 a is connected to the suction port 45 a of the cut blower 45. One blower pipe 33 b has one end connected to the blower opening 45 b of the cut blower 45 and the other end connected to the first separator 38. As is well known, the cut blower 45 is formed by integrating a rotary cutter and a blower.

  With the configuration of the first air sending system 36, air is sucked by the cut blower 45 from one end of the air sending pipe 33a, and the sucked air is sent to the air sending pipe 33b. In this manner, the wind directed from the suction portion 31 toward the first separator 38 is generated in the first blower pipe 33, and the ear portion F0 sucked from the suction port 31a by this wind passes through the first blower pipe 33. The air is sent to the first separator 38 (first air sending step).

  In the middle of the air blowing of the ear portion F0 by the first air blowing tube 33, the cut blower 45 forms a film piece F1 obtained by cutting the long ear portion F0 sucked from the suction port 45a into an appropriate length ( Cutting step). This film piece F1 is sent out from the blower opening 45b of the cut blower 45 and blown to the first separator 38 via the blower pipe 33b.

  The first separator 38 is connected downstream of the first air sending system 36. The first separator 38 is of a cyclone type, generates a vortex inside by the wind from the air pipe 33b, and separates the wind supplied through the air pipe 33b and the film piece F1 (first separation). Process). The separated wind (air) is supplied to the air supply port 31 b of the suction unit 31 through the return duct 47. When there is evaporation of the solvent from the ear part F0 and the film piece F1 to be blown, it is preferable that the solvent contained in the separated air is recovered by the recovery device and then supplied to the suction unit 31.

  In this example, a cut blower 45 connected in the middle of the first blower pipe 33 is used as the blower of the first blower system 36, but the blower of the first blower system 36 is limited to this. It is not a thing. For example, the cutter and the blower may be provided separately. Alternatively, a blower that sucks air from the first separator 38 and blows the air to the first air pipe 33 via the suction portion 31 may be used. Further, an ejector may be used as the blower. When the ejector is used, air is sucked at the end of the first air pipe 33 on the suction portion 31 side by jetting high-pressure air downstream (in the air feeding direction) in the first air pipe 33. Make it happen.

  The crusher 41 crushes the film piece F1 finely, and the crushing mechanism 52 is provided in the crushing chamber 51 inside. The crusher 41 is provided with an input port 41a at the top and a discharge port 41b at the bottom. The discharge port of the first separator 38 is connected to the input port 41a, and the film piece F1 separated by the first separator 38 is input into the crushing chamber 51 through the input port 41a.

  The crusher 41 used in this example is of a uniaxial crushing type, and the crushing mechanism 52 includes a rotary shaft 52a, a rotary blade 52b, and a fixed blade 52c. The rotating shaft 52a is arranged horizontally, for example, and continuously rotates by a motor (not shown). A plurality of rotary blades 52b are attached to the rotary shaft 52a at appropriate intervals in the circumferential direction. Each rotary blade 52b is a plate-like blade blade along the axial direction of the rotary shaft 52a, and is attached to the rotary shaft 52a with the blade tip facing outward. The fixed blade 52c is fixed to the inner wall of the crushing chamber 51 with the blade edge parallel to the blade edge of the rotary blade 52b. The rotary blade 52b and the fixed blade 52c are adjusted to have an appropriate clearance between the blade edges. The clearance between the rotary blade 52b and the fixed blade 52c varies depending on the thickness of the object to be crushed, but is adjusted to several tens of μm as a guide in order to prevent blade wear and contact.

  In the crushing chamber 51, a screen 53 is disposed between the crushing mechanism 52 and the discharge port 41b. The screen 53 has a shape curved into a semi-cylindrical shape having a certain clearance with the rotary blade 52b. The clearance is, for example, 1 mm or more. As the screen 53, for example, punching metal having a plurality of holes 53a formed on the entire surface is used. The diameter of the hole 53a is determined based on the size at which the film piece F1 is finally crushed. The diameter of the hole 53a is preferably 2 mm to 10 mm, and the aperture ratio of the screen 53 is preferably 25% to 80%. The screen 53 may be a mesh or the like.

  The crusher 41 configured as described above crushes the crushing piece F1a obtained by crushing the film piece F1 or the film piece F1 between the rotary blade 52b and the fixed blade 52c by the rotation of the rotating shaft 52a (crushing). Process). Further, the film piece F1 and the crushed piece F1a placed on the screen 53 are wound up and floated by the rotation of the rotary blade 52b, and are crushed by the rotary blade 52b and the fixed blade 52c. By this crushing, the crushing piece F1a having a size passing through the hole 53a, that is, the crushing piece F1a crushed to a predetermined size or less, falls below the crushing chamber 41 through the hole 53a, and further the discharge port 41b. Discharged from. In the following description, the crushed piece F1a discharged through the hole 53a will be referred to as a chip F2.

  The configuration of the crusher 41 is not limited to the above as long as it crushes a film-like workpiece. For example, a biaxial crushing type or a hammer type may be used. In addition, the input direction and discharge direction of the workpiece, the axial direction of the rotary blade, and the like can be changed as appropriate.

  The second air sending system 37 sends the chips F2 discharged from the crusher 41 from the crusher 41 to the second separator 39. The second air sending system 37 includes a second air sending tube 54 and a suction device 55. The second air pipe 54 is connected to the second separator 39 at the downstream end, and to the pressure adjusting blower 43 at the upstream end. A discharge port 41 b of the crusher 41 is connected to a position downstream of the pressure adjusting blower 43 of the second air feeding pipe 54.

  The suction device 55 sucks the air in the second blower pipe 54 from the discharge port 41b side via the second separator 39, and then moves from the discharge port 41b to the second separator 39 in the second blower pipe 54. Generate wind in the direction. Thereby, the chip | tip F2 discharged | emitted (introduced) in the 2nd ventilation pipe | tube 54 from the discharge port 41b is blown toward the 2nd separator 39 (2nd ventilation process).

  In this example, the suction device 55 is connected to the downstream side of the second blower pipe 54 via the second separator 39, thereby being connected to the downstream side of the discharge port 41 b of the second blower pipe 54. Yes. The connection position of the suction device 55 is not limited as long as it is on the downstream side of the discharge port 41b of the second blower pipe 54. For example, a suction device 55 may be connected in the middle of the second air feeding pipe 54 between the crusher 41 and the second separator 39, and the wind may flow in a direction from the crusher 41 toward the second separator 39. Moreover, you may generate | occur | produce a wind in the 2nd ventilation pipe | tube 54 using an ejector as a suction device.

  The second separator 39 is a cyclone system similar to the first separator 38 and generates a vortex by the introduction of the wind from the second air feed pipe 54 to separate the chip F2 and the wind. It is also preferable to collect or exhaust the solvent contained in the air with a recovery device without directly discharging the air sucked by the suction device 55 through the second separator 39.

  The chip F2 separated from the wind by the second separator 39 is discharged into the silo 42. When an appropriate amount of chips F2 is stored in the silo 42, the stored chips F2 are taken out and reused as raw materials.

  The sticking of the film piece F1 or the shredded piece F1a to the screen 53 is the pressure inside the crushing chamber 51 with the screen 53 as a boundary, that is, the pressure on the inlet 41a side (crushing mechanism 52 side) (hereinafter referred to as the upper pressure) P1 The pressure difference ΔP (= P1−P2) obtained by subtracting the pressure on the lower side, that is, the discharge port 41b side (hereinafter referred to as the lower pressure) P2, is generated by acting on the film piece F1 and the crushed piece F1a having low rigidity through the hole 53a . For this reason, the pressure adjustment blower 43 for reducing the pressure difference ΔP is provided to prevent the film piece F1 and the crushed piece F1a from sticking to the screen 53.

  In the pressure adjusting blower 43, the blower port 43a is connected to the upstream side of the second blower pipe 54 from the discharge port 41b. That is, the pressure adjusting blower 43 is connected to the second air pipe 54 in a direction in which air is blown in the downstream direction. The pressure adjusting blower 43 pressurizes the discharge port 41b side of the crusher 41 using the function of increasing the pressure as a function of the blower, and the lower pressure in the crushing chamber 51 via the second blower pipe 54 and the discharge port 41b. The pressure difference ΔP is adjusted by increasing P2 (pressurizing step). The pressure adjusting blower 43 is driven by a controller 57 via a driver 56, for example, the rotation speed of the fan is controlled. In this example, the controller 57 is preset with the number of rotations of the pressure adjusting blower 43 for setting the pressure difference ΔP to prevent the film piece F1 or the fragmented piece F1a from sticking to the screen 53. The adjustment blower 43 is driven. The pressure difference ΔP is adjusted to be smaller as the thickness of the film piece F1 is smaller, that is, as the rigidity is smaller.

  When the film pieces F1 are actually crushed continuously, the pressure difference ΔP varies almost periodically. As one of the factors of this fluctuation, there is a repetition of the blockage of the hole 53a of the screen 53 and the release of the blockage during the crushing process. The blockage of the hole 53a is caused by the film piece F1 and the crushed piece F1a placed on the screen 53. After the rotary blade 52b passes near the surface of the screen 53, the film pieces F1 and the crushed pieces F1a that are being crushed sequentially fall on the screen 53, so that the area of the hole 53a to be closed increases gradually. As the area of the closing hole 53a gradually increases, the pressure difference ΔP also increases gradually. When the pressure difference ΔP is appropriate, the film piece F1 and the crushed piece F1a that have closed the hole 53a are lifted and floated when the rotary blade 52b passes near the screen 53, and the blockage of most of the holes 53b is released. The As a result, the pressure difference ΔP gradually decreases.

  In this example, adjustment is performed so that the average pressure difference ΔAP, which is the average value of the pressure difference ΔP that fluctuates as described above, is 50 Pa, that is, the rotation speed of the pressure adjustment blower 43 is set in the controller 57. Since the pressure distribution in the fluctuation of the pressure difference ΔP is approximately a normal distribution, the average pressure difference ΔAP corresponds to the center value of the fluctuation range of the pressure difference ΔP. In this example, the pressure difference ΔP fluctuates with a fluctuation range of about 20 Pa in the direction in which the pressure increases and decreases with the average pressure difference ΔAP as the center.

  For the film piece F1 having a thickness of 15 μm, it is preferable that the upper limit value is suppressed to 100 Pa or less and the lower limit value is maintained to 0 Pa or more in consideration of the variation of the pressure difference ΔP. That is, the fluctuation range of the pressure difference ΔP is preferably set to 100 Pa or less and 0 Pa or more.

  If the upper limit value of the pressure difference ΔP is 100 Pa or less, it is more reliable to release the state in which the film piece F1 or the crushing piece F1a is stuck to the screen 53 by winding the rotating rotary blade 52b and continue the crushing process. It will be a thing. That is, the film piece F1 and the crushed piece F1a stick to the screen 53 when the pressure difference ΔP acts through the hole 53a. However, if the upper limit value of the pressure difference ΔP is 100 Pa or less, the screen 53 is caused by the passage of the rotary blade 52b. The film piece F1 and the crushed piece F1a attached to the film are more reliably wound upward. Further, since almost all the holes 53a are closed by the film pieces F1 and the crushed pieces F1a (hereinafter, this state is referred to as a completely closed state of the screen 53), the film pieces F1 are more reliably prevented. Further, it is possible to more effectively avoid stopping the crushing processing apparatus 20 and the solution casting apparatus 10 due to sticking of the crushing pieces F1a to the screen 53.

  Further, when the screen 53 is in a completely closed state or a state close thereto, the ear portion F0 is not normally sucked by the suction portion 31 due to the influence, or the air is supplied to the second air feeding tube 54. Although it may be significantly reduced and the suction machine 55 may be overloaded and cause a failure, the occurrence of such a phenomenon can be prevented more reliably.

  Maintaining the lower limit of the pressure difference ΔP at 0 Pa or more means that the upper pressure P1 is equal to or higher than the lower pressure P2. By satisfying the condition of this lower limit value, it is possible to more reliably suppress the occurrence of a backflow in which the chip F2 moved to the discharge port 41b side moves to the input port 41a side through the hole 53a. From the viewpoint of moving the chip F2 to the discharge port 41b through the hole 53a, it is preferable to adjust the upper pressure P1 to be equal to or higher than the lower pressure P2, that is, to keep the lower pressure P2 lower than the upper pressure P1.

  By lowering the upper limit value of the pressure difference ΔP, the film piece F1 and the crushed piece F1a on the screen 53 are more reliably wound up and the state where the holes 53a of the film piece F1 and the crushed piece F1a are blocked is released. Can do. Further, by making the lower limit value higher, the backflow can be more reliably suppressed, and the tip F2 can be moved more smoothly toward the discharge port 41b. From such a viewpoint, it is more preferable that the upper limit value of the pressure difference ΔP is 90 Pa or less and the lower limit value is 10 Pa or more, and it is more preferable that the upper limit value is 70 Pa or less and the lower limit value is 20 Pa or more.

  When the upper limit of the pressure difference ΔP is reduced to 90 Pa, the film piece F1 and the crushed piece F1a on the screen 53 are easily wound up by the rotation of the rotary blade 52b. For this reason, the film piece F1 and the crushed piece F1a are The state of sticking to the screen 53 is easily released, and the crushing can be continued more reliably. Furthermore, when the upper limit value of the pressure difference ΔP is reduced to 70 Pa, the crushing process can be continued in a state where the suction pressure of the ear portion F0 by the suction portion 31 is stabilized. In addition, it is estimated that the suction pressure of the suction part 31 is stabilized because the screen 53 is suppressed from being irregularly and instantaneously closed or in a state close thereto.

  As described above, the pressure difference ΔP has an approximately normal distribution of pressure, and fluctuates about 20 Pa in the increasing direction and the decreasing direction as described above. Therefore, the upper limit value of the pressure difference ΔP is 100 Pa or less and the lower limit value is 0 Pa. In order to achieve the above, the average pressure difference ΔAP is adjusted within the range of 20 Pa to 80 Pa. Similarly, in order to set the upper limit value of the pressure difference ΔP to 90 Pa or less and the lower limit value to 10 Pa or more, the average pressure difference ΔAP is in the range of 30 Pa to 70 Pa, the upper limit value is 70 Pa or less, and the lower limit value is 20 Pa or less. For this purpose, the average pressure difference ΔAP is adjusted within a range of 50 Pa to 60 Pa. For example, if the average pressure difference ΔAP is 70 Pa, the upper limit value of the pressure difference ΔP can be 90 Pa and the lower limit value can be 50 Pa. If the average pressure difference ΔAP is 50 Pa, the upper limit value of the pressure difference ΔP is 70 Pa and the lower limit value is 30 Pa. can do.

  Setting the average pressure difference ΔAP to be equal to or less than 50 Pa is effective because the effect of the crushing process can be performed stably and continuously even on a thinner film piece F1. When setting in this way, it is preferable that the pressure difference ΔP be 0 Pa or more in consideration of the fluctuation range, and it is more preferable that the pressure difference ΔP be larger than 0 Pa.

  Needless to say, when the average pressure difference ΔAP is adjusted to correspond to the relatively thin film piece F1 (ear portion F0), the average pressure difference ΔAP can be applied to the thick film piece F1. Absent. Therefore, the average pressure difference ΔAP corresponding to the film piece F1 of 15 μm can be applied to crushing a thin film of 15 μm to 40 μm that is likely to stick to the screen 53 in recent years.

  The average pressure difference ΔAP is obtained based on the upper pressure P1 and the lower pressure P2 in the crushing chamber 51 measured in a state where the crushing processing device 20 is operated to crush the film piece F1. In this example, a pair of holes penetrating the upper part and the lower part of the crushing chamber 51 are formed in the crusher 41, and hollow pipes are respectively formed in the upper part of the crushing chamber 51 and the lower crushing chamber 51 from these formed holes. Inserted, the upper pressure P1 and the lower pressure P2 are measured with a pressure gauge outside the crusher 41 through this tube.

  The measuring method of the upper pressure P1 and the lower pressure P2 is not particularly limited. For example, even if a pressure sensor composed of a semiconductor pressure sensor or the like is arranged at each of the upper and lower portions of the crushing chamber 51 with the screen 53 as a boundary, a signal from each pressure sensor may be taken out of the crusher 41. Good. In order to accurately measure the upper pressure P1 and the lower pressure P2, the film piece F1, the crushed piece F1a, and the tip F2 do not adhere to the pressure sensor, and the film piece F1, the crushed piece F1a, and the tip F2 do not block the tube. Measure in this way.

  In addition, during the measurement of the upper pressure P1 and the lower pressure P2, when the clogging of the hole 53b by the film piece F1 or the crushing piece F1a is not released, the crushing processing device 20 is stopped, the clogging processing device 20 is released, Measurements must be made. Therefore, for example, the rotational speed of the pressure adjusting blower 43 is set in a direction to reduce the average pressure difference ΔAP so as to release the blockage, and the crushing processing device 20 is operated from that state to crush the film piece F1. It is preferable to start the measurement and obtain the average pressure difference ΔAP based on the measurement result, and adjust the rotation speed of the pressure adjusting blower 43 so as to be the average pressure difference ΔAP to be set.

  Even when the target average pressure difference ΔAP is adjusted to 50 Pa, for example, as described above, it is often difficult to accurately match the average pressure difference ΔAP including this example. Therefore, the target average pressure difference ΔAP may be regarded as the target average pressure difference ΔAP by limiting the amplitude to 10% in each of the plus direction and the minus direction.

  When the object to be treated is a cellulose acylate film, the pressure adjustment blower keeps the pressure on the outlet side lower than the pressure on the inlet side in the crushing chamber, and the pressure on the inlet side in the crushing chamber It is a preferred embodiment that the average pressure difference, which is the average of the pressure differences obtained by subtracting the pressure on the outlet side from 50 to 50 Pa or less. Further, the upper limit value of the pressure difference obtained by subtracting the pressure on the discharge port side from the pressure on the input port side in the crushing chamber is set to 70 Pa while maintaining the pressure on the discharge port side lower than the pressure on the input port side in the crushing chamber. The following is also a preferred embodiment. Furthermore, it is also a preferred embodiment that the upper limit value of the fluctuation range in which the pressure difference obtained by subtracting the pressure on the discharge port side from the pressure on the input port side in the crushing chamber fluctuates is 70 Pa or less and the lower limit value is 30 Pa or more.

  Next, the operation of the above configuration will be described. The dope 11 is supplied to the casting die 24, and the dope 11 is discharged toward the casting band 21 running from the discharge port. Thereby, the casting film 27 is formed on the casting band 21. Since the dope 11 is continuously discharged from the casting die 24 and the casting band 21 continues to travel, the casting film 27 is continuously formed.

  The formed casting film 27 is conveyed as the casting band 21 travels. During this conveyance, initial drying is performed by the heater 29 or the like, and the drying is advanced to a state where it can be peeled off from the casting band 21. When the casting film 27 is further conveyed, the film 12 peeled off from the casting band 21 and wound around the peeling roller 25 is pulled, so that the casting film 27 has a predetermined peeling position. The film is peeled off from the casting band 21 and fed out as the film 12 to the outside of the chamber 26.

  The film 12 is sent to a tenter 15 and is stretched in the width direction by the tenter 15 while moving in the transport direction. At this time, it is preferable to expand the film 12 by 0.5% to 300% in the width direction. In the tenter 15, the film 12 is heated and cooled by dry gas.

  The film 12 stretched by the tenter 15 is sent to the drying chamber 16 and further dried while passing through the drying chamber 16. The dried film 12 is sent from the drying chamber 16 toward the winding device 18. On the way to the drying chamber 16, both sides of the film 12 are cut off by the cutting device 17, and the central portion of the film 12 from which both sides are cut is sent to the winding device 18 and wound.

  On the other hand, the ear | edge part F0 cut | disconnected from the center part of the film 12 is sent to the suction part 31 of the crushing processing apparatus 20 continuously. In the suction part 31, suction force by the cut blower 45 is generated in the suction port 31a. For this reason, the ear | edge part F0 is attracted | sucked with the air in the ventilation pipe | tube 33a through the suction opening 31a, and is blown toward the cut blower 45 in the ventilation pipe | tube 33a.

  When the long ear portion F0 continuously blown is sucked into the cut blower 45, it is cut short into the film piece F1. And the film piece F1 is sent to the 1st separator 38 one by one through the air sending pipe 33b one by one by the ventilation of the cut blower 45.

  In the 1st separator 38, the wind supplied through the ventilation pipe | tube 33b forms the vortex | eddy_current. For this reason, the wind and the film piece F1 are separated, and the film piece F1 is introduced into the crushing chamber 51 of the crusher 41 from the first separator 38 through the introduction port 41a.

  The film piece F1 thrown into the crushing chamber 51 falls on the screen 53 as it is from the charging port 41a, or is carried to the fixed blade 52c by the rotating blade 52b that continuously rotates and is crushed. Further, the crushed pieces F1a generated by being crushed by the rotary blade 52b and the fixed blade 52c are dropped on the screen 53, or are again conveyed to the fixed blade 52c by the rotary blade 52b and further crushed. Further, the film piece F1 and the crushed piece F1a placed on the screen 53 are lifted and floated from the screen 53 by the rotation of the rotary blade 52b, and a part of the film piece F1 and the crushed piece F1a are crushed by the rotary blade 52b and the fixed blade 52c. By repeating such crushing, the film piece F1 and the crushing piece F1a become gradually smaller. And the chip | tip F2 smaller than the hole 53a of the screen 53 moves to the lower part of the crushing chamber 51c through the hole 53a, and is discharged | emitted from the discharge port 41b in the 2nd ventilation pipe 54. FIG. Since there is wind from the suction machine 55 in the second air feed pipe 54, the chip F2 is sent to the second separator 39 through the second air feed pipe 54 by the wind.

  In the second separator 39, a vortex flow is generated inside by the wind from the second air pipe 54. For this reason, the wind supplied from the second air pipe 54 and the chip F2 are separated, and the separated chip F2 falls into the silo 42 from the lower part of the second separator 39 and is stored. When an appropriate amount of chips F2 is accumulated in the silo 42, it is taken out of the silo 42 and sent to a process for reuse as a raw material.

  By the way, the ventilation to the 1st separator 38 by the cut blower 45 becomes a factor which raises the upper pressure P1 of the crushing chamber 51. FIG. On the other hand, the suction by the suction device 55 is a factor that lowers the lower pressure P <b> 2 of the crushing chamber 51. As a result, a pressure difference ΔP is generated, and when the pressure difference ΔP is increased, the film piece F1 and the crushed piece F1a are attached to the screen 53, and the state of closing the hole 53a is not released.

  However, in this example, the lower part of the crushing chamber 51 is moved by the pressure adjusting blower 43 connected to a position on the upstream side of the discharge port 41b of the second blower pipe 54 via the second blower pipe 54 and the discharge port 41b. Pressure is applied and the pressure difference ΔP is reduced. For this reason, the state in which the film piece F1 and the crushed piece F1a mounted on the screen 53 are stuck to the screen 53 and block the hole 53a is not released. Therefore, since the film piece F1 and the crushing piece F1a which are mounted on the screen 53 are wound up and floated by the rotation of the rotary blade 52b, crushing proceeds. Further, since the state where the hole 53a is closed does not continue, the chip F2 is discharged to the second air pipe 54 through the hole 53a. Thereby, a crushing process is performed continuously and the solution casting apparatus 10 is not stopped. Note that wind is generated by the operation of the pressure adjusting blower 43, but since the wind is in the direction of air sent by the second air sending system 37, there is no problem in the air sending.

[Second Embodiment]
As shown in FIG. 4, the second embodiment has a configuration in which the air blowing port of the pressure adjusting transmitter 43 is directly connected to the crushing chamber 51. Note that, except for the details described below, the second embodiment is the same as the first embodiment, and the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  The pressure adjusting blower 43 is connected to the crusher 41 so that the blower opening 43a is exposed to a space between the discharge port 41b in the crushing chamber 51 and the screen 53 (hereinafter referred to as a lower space). Thereby, the lower space is pressurized by the pressure adjusting blower 43 to reduce the pressure difference ΔP. In addition, the 2nd ventilation pipe 54 is closed at the upstream end, and is sucked by the suction machine 55 on the downstream side.

[Third Embodiment]
In the third embodiment, the upper pressure and the lower pressure in the crushing chamber are measured to control the driving of the pressure adjusting blower. Note that, except for the details described below, the second embodiment is the same as the first embodiment, and the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  In this example, as shown in FIG. 5, the crushing chamber 51 has a pressure sensor 61a as a first sensor for measuring the upper pressure P1 and a pressure sensor 61b as a second sensor for measuring the lower pressure P2. It is arranged. As the pressure sensors 61a and 61b, for example, semiconductor pressure sensors or the like whose measurement results are not affected by adhesion of the fragments F1a and chips F2 are used. The measurement results of the pressure sensors 61a and 61b are sent to the controller 62.

  The controller 62 calculates the pressure difference ΔP between the upper pressure P1 and the lower pressure P2 from the measurement results of the pressure sensors 61a and 61b, and drives the pressure adjusting blower 43 so that the average pressure difference ΔAP of the pressure difference ΔP becomes a set value. To control. For example, the set value is set to 50 Pa, and the rotational speed of the blower 39 is controlled so that the average pressure difference ΔAP becomes the set value.

  For example, the controller 62 calculates a moving average for a certain period of the pressure difference ΔP. Each of the upper pressure P1 and the lower pressure P2 from the pressure sensors 61a and 61b is sampled at an appropriate cycle, and the controller 62 updates the moving average based on the upper pressure P1 and the lower pressure P2 for each sampling. When the moving average is higher than the set value, the rotational speed of the blower 39 is decreased, and when it is low, the rotational speed of the blower 39 is increased. Thus, the average pressure difference ΔAP is maintained at the set value. The method for controlling the rotational speed of the blower 39 by the controller 62 is not limited to the above. For example, a setting range in which the setting value is given a range may be set, and when the moving average is outside the setting range, the rotation speed of the blower 39 may be controlled to increase or decrease.

  According to this example, even when the pressure difference due to the first air sending system 36 or the second air sending system 37 fluctuates greatly, the film piece F1 and the crushed piece F1a are stuck to the screen 53. Can be stably prevented.

  In this 3rd Embodiment, although the pressure adjustment blower 43 connected to the 2nd ventilation pipe 54 is controlled, it controls similarly about the pressure adjustment blower 43 connected to the crusher like 2nd Embodiment. You can also.

  In each said embodiment, although the thing of a cyclone system is used as a 1st, 2nd separator, a 1st, 2nd separator is not limited to a cyclone system. The first separator 66 shown in FIG. 6 includes a duct portion 67 connected between the crusher 41 and the air pipe 33 b and a plurality of holes 67 a formed in the duct portion 67. According to this, since the wind by the cut blower 45 escapes from the hole 67a when passing through the duct portion 67, the wind and the film piece F1 can be separated. In addition, the hole 67a is made into the magnitude | size which cannot pass the film piece F1 to wind. When such a 1st separator 66 is used, since the long ear | edge part F0 can be isolate | separated from a wind, the ear | edge part F0 is blown to the crusher 41 with a long length, and it is continuously sent to the crusher 41. You may throw in and crush. A bag filter type can also be used as the first separator or the second separator.

[Experiment]
The effect was confirmed using the crushing processing apparatus 20 shown in FIG. As the crusher 41, a rotating blade 52b having a rotation radius of 200 mm, a number of blades of 4 and a blade width of 450 mm was used. The clearance between the rotary blade 52b and the fixed blade 52c was 60 μm, and the clearance between the rotary blade 52b and the screen 53 was 1.5 mm. The rotational speed of the rotary blade 52b was 60 revolutions per minute. The screen 53 used was a staggered arrangement in which the angle of the line connecting the centers of the holes 53a was 60 °. In the screen 53, the diameter of the hole 53a was 5 mm, and the opening ratio was about 40%.

  As the object to be processed, various combinations of ears F0 having a thickness of 15 μm to 40 μm and a width of 40 mm to 250 mm were cut by the cut blower 45 and then crushed by the crusher 41. The processing speed in the crusher 41 was 35 kg per hour. Whether or not the crushing was continuously performed was confirmed by looking through the window provided in the vicinity of the discharge port 41b.

  The rotation speed of the pressure adjusting blower 43 was adjusted to adjust the average pressure difference ΔAP to a target value. In this adjustment, the pressures of the upper pressure P1 and the lower pressure P2 in the crushing chamber 51 are measured, and an average pressure difference ΔAP is obtained based on the measured results so that the obtained average pressure difference ΔAP becomes a target value. . The upper pressure P1 and the lower pressure P2 were measured by inserting a tube into the crushing chamber 51 and measuring with a pressure gauge through the tube.

  When the average pressure difference ΔAP is 50 Pa, the crushing is continuously performed in any combination of the thickness of 15 μm to 40 μm and the width of 40 mm to 250 mm, and the chips F2 are sequentially discharged from the discharge port 41b. Sent to 42. Further, it was judged that the load was not completely closed because the load of the cut blower 45 and the suction machine 55, the suction pressure of the ear F0 by the suction unit 31 and the pressure of the second air sending system 37 were not changed suddenly. did it. From these, it was found that the crushing treatment of the film piece F1 and the crushing piece F1a can be performed continuously and stably.

  When the average pressure difference ΔAP was 70 Pa, it was confirmed that crushing was continuously performed and the chip F2 was sent to the silo 42 as in the case where the average pressure difference ΔAP was 50 Pa. In the case where this average pressure difference ΔAP is 70 Pa, instantaneous fluctuations in the suction pressure of the ear F0 by the suction part 31 were irregularly observed, but there was no problem in the continuation of the crushing and suction of the ear F0 by that. The crushing process could be performed continuously.

  In both cases where the average pressure difference ΔAP was 50 Pa and 70 Pa, the pressure difference centered around the average pressure difference ΔAP fluctuated in a range of about 20 Pa in the increasing direction and the decreasing direction.

  In each of the above embodiments, an example of crushing a film manufactured by solution casting as a film-like object has been described. However, the present invention is also used when crushing a film manufactured by melt casting, for example. In addition to film, it can be used for crushing film-like metal or paper.

DESCRIPTION OF SYMBOLS 10 Solution film forming equipment 14 Casting apparatus 17 Cutting apparatus 20 Crushing processing apparatus 36 1st air sending system 37 2nd air sending system 38 1st separator 39 2nd separator 41 Crushing machine 43 Pressure adjustment blower 45 Cut blower 53 Screen 53a Hole 55 Suction machine

Claims (10)

A first blower pipe into which the film-like object to be treated is introduced from the introduction port; and a blower for generating air in the first blower pipe; A first air sending system to send,
A first separator that is connected downstream of the first air sending system and separates the object to be processed and the wind conveyed by the first air sending system;
An input port is connected to the first separator, a crushing mechanism for crushing the workpiece to be fed into the crushing chamber from the input port, and a crushing mechanism and a discharge port disposed between the crushing mechanism and the discharge port. a crusher which have a crushed fragments treated in advance to a defined size below SCREEN which a plurality of holes are formed through the discharge port side,
A second air pipe connected to the outlet and into which the fragments from the outlet are introduced, and connected downstream from the outlet of the second air pipe and sucked from the outlet side A suction device that generates wind in the second air pipe, and a second air sending system that airs the crushed pieces through the second air pipe;
A pressure adjusting blower that pressurizes the discharge port side of the crusher and adjusts the pressure difference obtained by subtracting the pressure on the discharge port side from the pressure of the input port in the crushing chamber;
Equipped with a,
The blower is connected to the first air pipe or the first separator, and generates a wind from the introduction port toward the first separator,
The crushing processing apparatus, wherein the pressure adjusting blower is connected upstream of the discharge port and upstream of the second air pipe in a direction of blowing air in the downstream direction . A first blower pipe into which the film-like object to be treated is introduced from the introduction port; and a blower for generating air in the first blower pipe; A first air sending system to send,
A first separator that is connected downstream of the first air sending system and separates the object to be processed and the wind conveyed by the first air sending system;
An input port is connected to the first separator, a crushing mechanism for crushing the workpiece to be fed into the crushing chamber from the input port, and a crushing mechanism and a discharge port disposed between the crushing mechanism and the discharge port. A crusher having a screen in which a plurality of holes through which a crushed piece obtained by crushing a processed material to a predetermined size or less is passed to the discharge port side;
A second air pipe connected to the outlet and into which the fragments from the outlet are introduced, and connected downstream from the outlet of the second air pipe and sucked from the outlet side A suction device that generates wind in the second air pipe, and a second air sending system that airs the crushed pieces through the second air pipe;
A pressure adjusting blower that pressurizes the discharge port side of the crusher and adjusts the pressure difference obtained by subtracting the pressure on the discharge port side from the pressure of the input port in the crushing chamber;
With
The blower is connected to the first air pipe or the first separator, and generates a wind from the introduction port toward the first separator,
The pressure adjusting blower, said crushing chamber crushing apparatus characterized by blowing air to the space between the screen and the outlet of the crushing chamber.   The crushing processing apparatus according to claim 1, wherein the pressure adjusting blower sets a fluctuation range of the pressure difference to 0 Pa or more and 100 Pa or less. A first sensor for measuring a pressure on the inlet side in the crushing chamber;
A second sensor for measuring the pressure on the outlet side in the crushing chamber;
A controller for controlling driving of the pressure adjusting blower based on measurement results of the first sensor and the second sensor;
The crushing processing apparatus according to any one of claims 1 to 3, further comprising:   The crusher has a fixed blade fixed in a crushing chamber and a rotary blade attached to a rotating shaft, and crushes the workpiece by sandwiching the workpiece between the fixed blade and the rotary blade. The crushing processing apparatus of any one of Claim 1 thru | or 4. The blower is a cut blower disposed in the middle of the first air pipe,
The first air pipe is introduced with the long object to be processed from the introduction port,
The crushing processing apparatus according to claim 1, wherein the first separator separates the workpiece cut by the cut blower from wind. A first air blowing step in which a film-like object introduced into the first air blowing pipe from the introduction port is blown through the first air sending pipe by wind generated in the first air sending pipe by a blower; ,
A first separation step of separating the object to be processed conveyed by the first air pipe by means of a first separator connected downstream of the first air pipe;
The object to be processed separated in the first separation step is put into a crushing chamber from a crusher inlet connected to the first separator and crushed, and the object to be processed is crushed to a predetermined size or less. Crushing step of discharging the crushed pieces from the outlet through a plurality of holes formed in the screen;
Second, the air in the second air pipe connected to the discharge port is sucked from the discharge port side by a suction machine to generate a wind directed downstream, and the crushed pieces are blown through the second air pipe. The air blowing process;
A pressurizing step of pressurizing the discharge port side of the crusher with a pressure adjusting fan in order to adjust so as to reduce the pressure difference obtained by subtracting the pressure on the discharge port side from the pressure of the input port in the crushing chamber;
I have a,
The blower is connected to the first air pipe or the first separator, and generates a wind from the introduction port toward the first separator,
The crushing method according to claim 1, wherein the pressure adjusting blower is connected upstream of the discharge port and upstream of the second air pipe in a direction of blowing air in the downstream direction . A first air blowing step in which a film-like object introduced into the first air blowing pipe from the introduction port is blown through the first air sending pipe by wind generated in the first air sending pipe by a blower; ,
A first separation step of separating the object to be processed conveyed by the first air pipe by means of a first separator connected downstream of the first air pipe;
The object to be processed separated in the first separation step is put into a crushing chamber from a crusher inlet connected to the first separator and crushed, and the object to be processed is crushed to a predetermined size or less. Crushing step of discharging the crushed pieces from the outlet through a plurality of holes formed in the screen;
Second, the air in the second air pipe connected to the discharge port is sucked from the discharge port side by a suction machine to generate a wind directed downstream, and the crushed pieces are blown through the second air pipe. The air blowing process;
A pressurizing step of pressurizing the discharge port side of the crusher with a pressure adjusting fan in order to adjust so as to reduce the pressure difference obtained by subtracting the pressure on the discharge port side from the pressure of the input port in the crushing chamber;
Have
The blower is connected to the first air pipe or the first separator, and generates a wind from the introduction port toward the first separator,
In the pressurizing step, the pressure adjusting blower pressurizes the discharge port side by blowing air to the space of the crushing chamber between the discharge port and the screen in the crushing chamber. Method. A casting process for forming a casting film by casting a dope on a casting surface of a traveling support;
An initial drying step of drying the cast film to a state where it can be peeled off from the support;
A stripping step of stripping the cast film dried in the initial drying step as a film from the support;
A cutting step of separating the side of the film;
The side part or the cut piece of the side part as the film-like object to be processed introduced into the first air pipe from the introduction port by wind generated in the first air pipe by the blower, A first air blowing process in which air is sent through an air pipe;
A first separation step of separating the object to be processed conveyed by the first air pipe by means of a first separator connected downstream of the first air pipe;
The object to be processed separated in the first separation step is put into a crushing chamber from a crusher inlet connected to the first separator and crushed, and the object to be processed is crushed to a predetermined size or less. Crushing step of discharging the crushed pieces from the outlet through a plurality of holes formed in the screen;
Second, the air in the second air pipe connected to the discharge port is sucked from the discharge port side by a suction machine to generate a wind directed downstream, and the crushed pieces are blown through the second air pipe. The air blowing process;
A pressurizing step of pressurizing the discharge port side of the crusher with a pressure adjusting fan in order to adjust so as to reduce the pressure difference obtained by subtracting the pressure on the discharge port side from the pressure of the input port in the crushing chamber;
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The blower is connected to the first air pipe or the first separator, and generates a wind from the introduction port toward the first separator,
The solution-casting method, wherein the pressure adjusting blower is connected upstream of the discharge port and upstream of the second air pipe in a direction of blowing in the downstream direction . A casting process for forming a casting film by casting a dope on a casting surface of a traveling support;
An initial drying step of drying the cast film to a state where it can be peeled off from the support;
A stripping step of stripping the cast film dried in the initial drying step as a film from the support;
A cutting step of separating the side of the film;
The side part or the cut piece of the side part as the film-like object to be processed introduced into the first air pipe from the introduction port by wind generated in the first air pipe by the blower, A first air blowing process in which air is sent through an air pipe;
A first separation step of separating the object to be processed conveyed by the first air pipe by means of a first separator connected downstream of the first air pipe;
The object to be processed separated in the first separation step is put into a crushing chamber from a crusher inlet connected to the first separator and crushed, and the object to be processed is crushed to a predetermined size or less. Crushing step of discharging the crushed pieces from the outlet through a plurality of holes formed in the screen;
  Second, the air in the second air pipe connected to the discharge port is sucked from the discharge port side by a suction machine to generate a wind directed downstream, and the crushed pieces are blown through the second air pipe. The air blowing process;
A pressurizing step of pressurizing the discharge port side of the crusher with a pressure adjusting fan in order to adjust so as to reduce the pressure difference obtained by subtracting the pressure on the discharge port side from the pressure of the input port in the crushing chamber;
Have
The blower is connected to the first air pipe or the first separator, and generates a wind from the introduction port toward the first separator,
In the pressurizing step, the pressure adjusting blower pressurizes the discharge port side by blowing air to the space of the crushing chamber between the discharge port and the screen in the crushing chamber. Membrane method.

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