JP2008006356A - Separation apparatus and method of rubbish, and air-blowing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for stably separating rubbish even if the rubbish is thin and light. <P>SOLUTION: A separator 38 has an inner basket 52 and an outer framework 53. In the inner basket 52, a bottom side part is opened and a side part is formed with side plates 58-61. In a punching metal of the side plates 58-61, a projection 71, which has an angle shape and projects towards the inward of the inner basket 52, is formed. A supplying pipe 54 is installed along the side plate 59. Wind with rubbish is nearly horizontally blew out from the supplying pipe 54. The side plates 58-61 separate rubbish from wind with rubbish. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a debris separating apparatus and method for separating the debris from wind accompanied by debris, and a wind feeding method.

  Polymer films (hereinafter referred to as “films”) have excellent light transmittance and flexibility, and can be reduced in thickness and are widely used as optical functional films. Among these, the cellulose ester film using cellulose acylate has toughness and low birefringence in addition to the above-described properties. This cellulose ester film is used as a protective film and an optical compensation film for polarizing plates, which are constituent members of liquid crystal display devices (LCDs) whose market has been expanding in recent years, including photographic photosensitive films.

  One method for producing this film is a solution casting method. In the solution casting method, a dope containing a polymer and a solvent is cast on a support from a casting die to form a casting film, and after the casting film has a self-supporting property, The film is peeled off from the support to form a wet film, and dried while the wet film is transported in a tenter. The advantage of this solution casting method is that a film having excellent optical isotropy and thickness uniformity and containing few foreign substances can be produced. Therefore, many optical functional films used for LCDs are manufactured by a solution casting method.

  While the film is peeled off from the support and wound up as a product, the side end portion (hereinafter referred to as “ear portion”) of the film whose thickness is likely to fluctuate as compared with the central portion is cut by an ear-cutting device. The cutting of the ear is continuously performed by applying a rotary blade fixed at a predetermined position to the running film. The cutting of the ear portion also serves to align the film width to a desired width.

  The cut ear part is sent to the collecting part together with the wind by the air feeding equipment. In the air blowing facility, first, the long ear portion cut by the ear-cutting device is continuously cut by the ear-cutting device, and is blown into fine fragments (hereinafter referred to as “ear waste”). Thereafter, the blown ear dust is separated from the wind by the separating device. The ear dust is sent to the crusher, and the crusher further pulverizes the ear dust. The refined ear dust is collected in the collecting section and reused as a raw material.

  Examples of the separation device include a cyclone and a cage separator. The cyclone separates the wind containing the ear dust into the ear waste and the wind from which the ear dust is removed, and sends them to separate pipes. The wind sent to the pipe is used again to feed the ear dust. As shown in FIG. 9, the cage separator 2 is provided with a flat side plate 3 in which a large number of holes 3a are formed, and the wind 4 containing ear dust is fed into the inside, and the wind is blown from the holes 3a. Let go, separate ear dust and drop it into the crusher. In addition, in order to avoid that a figure becomes complicated, the code | symbol 3a is attached | subjected only to one of many holes.

The invention of Patent Literature 1 can be cited as a device related to the device after cutting the ear portion. In the present invention, the tension of the ear is adjusted by a pair of rollers that clamp the ear so that the ear after cutting can be stably conveyed.
JP 2005-238801 A

  However, the above-described cyclone and cage separators have the following problems. The cyclone is excellent in that the wind after separation can be reused, but it requires a certain length in the vertical direction, and is not effective when space cannot be secured due to layout constraints of the manufacturing equipment. In this respect, the cage separator has a length in the vertical direction of ½ or less compared to the cyclone type, and can be sufficiently installed even in a limited space.

  However, even with a cage separator, a new problem may occur in the case of thin and light ear dust. Since such ear dust sticks to the hole of the cage separator and does not fall immediately, the hole is blocked with ear dust as time passes. Therefore, it becomes difficult to stably separate ear dust. In such a situation, it is necessary to remove the stuck ear dust, but the inside of the cage separator cannot be monitored.

  An object of this invention is to provide the waste separation apparatus and method which can isolate | separate stably even if it is thin and light waste, and an air blowing method.

  In order to solve the above problems, the present invention is to exhaust an air that has an opening at the bottom and at least a peripheral surface formed of a porous member, and surrounds the inner cage and passes through the holes of the porous member. A waste separation device for separating the waste blown into the inner basket from the wind using the porous member and dropping it downward, formed on the inner basket and facing inward A plurality of projecting portions projecting, and a supply pipe for blowing the waste in a substantially horizontal direction along the inner peripheral surface of the inner basket.

  When the average length of the waste is Lc and the pitch of the protrusions is P, it is preferable that Lc ≧ P. It is preferable that the protrusion is a protrusion that is formed long so as to intersect the direction of the wind from the supply pipe. A shooter is provided below the inner cage through the opening, and the shooter has a plurality of chute surfaces for guiding the waste downward, and is located at a position where the wind stays among the plurality of chute surfaces. It is preferable to make the inclination angle of the chute surface with respect to the vertical direction smaller than that of the other chute surfaces. It is preferable that a direction adjusting member for adjusting the blowing direction of the wind is attached to the tip of the supply pipe. It is preferable to provide monitoring means for monitoring the inside or outside of the inner basket. It is preferable that the monitoring means is a transparent window provided on the outer frame. Preferably, the monitoring means is a fiberscope, and the tip of the fiberscope is provided inside the inner basket. It is preferable that the diameter of the hole of the porous member is 1 mm or more and 5 mm or less, and the opening ratio per unit area is 30% or more and 60% or less.

  In the waste separation method of the present invention, the waste is blown in a substantially horizontal direction along the inner peripheral surface of the inner basket by a supply pipe for blowing the waste into the inner basket, and the waste is A plurality of protrusions formed to protrude inward from the inner basket are brought into contact with the wind and separated from the wind.

  Moreover, this invention has a 1st process which winds the side edge part of the film cut | disconnected from the film conveyed continuously in elongate form, and collect | recovers the said side edge part using the said 1st process. In the air blowing method for blowing air to a part, the side end portion is cut finely into ear dust, and the ear dust is separated from the wind using the waste separation method according to claim 10.

  According to the present invention, there is provided an inner cage having an opening at the bottom and at least a peripheral surface formed of a porous member, and an outer frame surrounding the inner cage and exhausting the wind that has passed through the holes of the porous member. And a plurality of protrusions that are formed in the inner basket and project inwardly in the waste separation device that separates the waste blown into the inner basket from the wind using the porous member and drops it downward. And a supply pipe for blowing the waste in a substantially horizontal direction along the inner peripheral surface of the inner basket, so that even if the waste is thin and light, the waste sticks to the hole of the porous member. It becomes possible to isolate | separate debris stably.

  As shown in FIG. 1, the film production line 10 includes a dope production line 11, a casting chamber 12, a tenter 13, a film drying chamber 14, a winding chamber 15, and the like.

  In the dope production line 11, a dope made of a polymer solution obtained by dissolving or dispersing a polymer in a solvent is produced. In the casting chamber 12, for example, a stainless steel band 16 is circulated and a dope 18 is cast from the casting die 17 on the band 16 to form a casting film 19. In the casting film 19 on the band 16, drying of the solvent in the casting film 19 is promoted by a drying air blown along the band 16 in the casting chamber 12. And when it comes to have self-supporting property, the casting film 19 is peeled off by the peeling roller 20, and the film 21 is obtained.

  Although the film 21 peeled off from the band 16 has a self-supporting property, it contains a large amount of solvent. Thereafter, the film 21 is sufficiently dried in the tenter 13 and the film drying chamber 14. In the tenter 13, the film 21 is run while the both ends of the film 21 are gripped by clips, and the film 21 is dried. The film 21 coming out of the tenter 13 is cut at a side end portion (hereinafter referred to as “ear portion”) of the film 21 in an ear-cutting device 22 provided downstream thereof. The cut ear portion is transported together with the wind by the air sending facility 24 and sent to the silo 26 which is a collecting portion. The ears collected by the silo 26 are reused as raw materials.

  On the other hand, the film 21 coming out of the ear-cutting device 22 runs on the drying roller 28 in the film drying chamber 14, and the solvent is sufficiently evaporated during the running and dried. The film 21 that has left the film drying chamber 14 is knurled by a knurling device 29. Thereafter, the ear 21 is trimmed again by the ear-cleaving device 30 and adjusted to a desired width. The cut ear is transported along with the wind by the air sending facility 32 and sent to the silo 33 as described above. In the winding chamber 15, the film 21 is wound around the winding core 33.

  FIG. 2 shows the air blowing facility 32 and its surroundings. The air sending facility 32 includes a suction duct 34, an ionizer 36, a cut blower 37, a separator 38, a crusher 39, and a dust collector 40. These devices are connected by pipes 43 to 48. In addition, since it is the same structure also about the other ventilation equipment 24, description is abbreviate | omitted.

  The suction duct 34 sucks the long ear part cut by the ear-cutting device 30. The sucked ear portion is sent to the ionizer 36 through the pipe 43. The ionizer 36 controls the charged voltage value of the ear and sends it to the cut blower 37 through the pipe 44.

  The cut blower 37 has a rotary cutter and a blower (both not shown). The rotary cutter continuously cuts the ears into fine pieces (hereinafter referred to as “ear scraps”). The blower sends wind to the pipe 45 and transports the ear dust to the separator 38 by the wind.

  The separator 38 separates the ear waste from the wind containing the ear waste (hereinafter referred to as “ear waste wind”). The separated ear dust is sent to the crusher 39, while the wind from which the waste has been removed is conveyed to the dust collector 40 through the pipe 48. Note that when the pressure in the separator 38 becomes high, the wind is forcibly exhausted from the exhaust duct 50 to the outside.

  As shown in FIG. 3, the separator 38 includes an inner basket 52, an outer frame 53, a supply pipe 54, a shooter 55, and an exhaust pipe 56. The inner basket 52 has a square cylindrical shape, the bottom surface portion is an opening 52a, the side surface portion is a total of four side plates 58 to 61 (see FIG. 7), and the top surface portion is formed by a plate 62 without holes. ing. An insertion hole 58a for the supply pipe 54 is formed in the side plate 58 to which the supply pipe 54 is attached among the side plates 58 to 61. Further, a fiber scope 65 is attached to the inner basket 52, and this fiber scope 65 is connected to a monitor or a computer (both not shown). The monitor projects an image from the fiberscope 65, and the computer records the image in a memory (not shown) in the computer as necessary. Thereby, it becomes possible to monitor the inside of the inner basket 52.

  FIG. 4 shows a front view of the side plate 59. The side plate 59 includes a punching metal 67 in which a large number of holes 67 a (see FIG. 5) are formed, and a mounting frame 68 provided on an edge of the punching metal 67. A mounting hole 68a is formed in the mounting frame 68. By fixing bolts through the mounting hole 68a with nuts (all not shown), the side plates 58 to 61 are combined to form a rectangular cylindrical inner The basket 52 is used. Moreover, the direction of a groove | channel can be changed freely by setting it as an assembly type. Note that only one of the mounting holes is denoted by reference numeral 68a.

  As shown in FIG. 5, in the punching metal 67, a large number of holes 67a having a hole diameter D of 3 mm are arranged in a staggered pattern of 60 ° with a pitch P1. The opening ratio per unit area by the holes 67a of the punching metal 67 is preferably in the range of 30% to 60%. The hole diameter D is preferably in the range of 1 mm to 5 mm. The pitch P1 is preferably in the range of 2 mm to 6 mm. Note that only one of the holes of the punching metal 67 is denoted by reference numeral 67a.

  FIG. 6 shows a cross-sectional view of the punching metal 67. The punching metal 67 is formed with a long protrusion 71 in the vertical direction. The protrusions 71 are formed in a large number with a pitch P2 in the horizontal direction, and the cross-sectional shape is substantially triangular. The pitch P2 is preferably in the range of 10 mm to 20 mm. The ear dust 72 is, for example, a rectangle, and an average length Lc of one side thereof is about 20 mm. By setting the pitch P <b> 2 of the protrusion 71 to be equal to or less than the length Lc of the ear dust 72, the ear waste 72 comes into contact with the punching metal 67 while being inclined by the protrusion 71, and the ear dust 72 is moved to the punching metal 67. No adhesion. In addition, although the cross-sectional shape of the protrusion 71 was made into the substantially triangular shape, it is not restricted to this, It is good also as a substantially semicircular shape, a substantially ellipse shape, and various other cross-sectional shapes.

  Moreover, it is preferable that the width W of the protrusion 71 is in the range of 10 mm or more and 20 mm or less. Moreover, it is preferable that the height H of the protrusion 71 is in the range of 4 mm or more and 10 mm or less. The thickness T of the punching metal 67 is preferably in the range of 1 mm to 3 mm.

  The side plates 60 and 61 are substantially the same as the side plate 59. Further, the side plate 58 is preferably substantially the same as the side plate 59 except that the insertion hole 58a is formed.

  As shown in FIG. 3, the outer frame 53 is provided so as to surround the inner basket 52. The outer frame 53 is provided with an attachment hole 53a for the supply pipe 54, an attachment hole 53b for the exhaust pipe 56, a forced exhaust port 53c for the exhaust duct 50, and an attachment hole 53d for the shooter 55. The outer frame 53 is provided with a transparent resin window 73 (see FIG. 2) so that the inner cage 52 can be monitored from the outside.

  The supply pipe 54 blows out the ear dust wind into the inner basket 52 in a substantially horizontal direction. As shown in FIG. 7, the supply pipe 54 passes through the attachment hole 53 a and the insertion hole 58 a and is attached along the side plate 59. A bellows-like SUS flexible hose 75 is attached to the tip of the supply pipe 54. The flexible hose 75 can change the exit angle θ2, and the exit angle θ2 can be changed to adjust the direction in which the ear dust wind is blown out. By attaching the supply pipe 54 with the above settings and adjusting the position of the exit angle θ2, the ear dust wind turns inside the inner basket 52 substantially parallel to the horizontal plane. The supply pipe 54 is attached along the side plate 59, but may be attached along any of the other side plates 60 and 61.

  As shown in FIG. 3, the shooter 55 is connected to the opening 52 a, goes out from an attachment hole 53 d formed in the outer frame 53, and is connected to the crusher 39. The chute surfaces 77 to 79 (see FIG. 7) of the shooter 55 are inclined at an angle θ3 with respect to the vertical line, and the chute surface 80 on the side plate 58 side is vertical with the angle θ3 being “0”. As indicated by hatching in FIG. 8, the staying areas 81 and 82 are places where the ear dust 83 that has come out of the supply pipe 54 and swirled in the inner basket 52 tends to stay. For this reason, by setting the chute surface 80 to be vertical, the chute efficiency is increased, and ear dust is prevented from being deposited on the chute surface 80. The term “vertical” as used herein refers to the direction in which gravity acts, and specifically refers to being perpendicular to the horizontal direction. Although only the chute surface 80 is vertical, the present invention is not limited to this, and the chute surface may be vertical according to the presence of a plurality of locations where the ear dust wind stays. Further, although the angle θ3 of the chute surface 80 is set to a vertical of “0”, it may be smaller than the angle θ3 of other chute surfaces.

  Next, the mechanism by which the separator 38 separates the ear dust will be described with reference to FIG. Ear dust wind 85 blown out from the supply pipe 54 swirls inside the inner basket 52. The ear dust wind 85 contacts either one of the side plates 58 to 61 or the chute surface 80 of the shooter 55. When the ear dust wind 85 comes into contact with the side plate 61, the ear dust stays on the side plate 61, and the wind from which the ear dust is removed passes through the holes of the side plate 61. Thereby, ear dust is separated from the ear dust wind 85. The separated ear dust falls to the crusher 39 as it is, or is guided to the chute surface 79 of the shooter 55 and sent to the crusher 39. At this time, the side plate 61 also accumulates due to the blowing air generated by the rotation of the crusher 39. The wind that has passed through the holes in the side plate 61 is discharged from the exhaust pipe 56 and sent to the dust collector 40. Note that the wind behavior shown in FIG. 8 is an example, and many other behaviors are conceivable.

  The ear dust remaining on the side plate 61 falls from the side plate 61 immediately without sticking continuously to the side plate 61 for the following reason. When the ear dust sticks to the protrusion 71, unlike the case where the entire surface sticks to a flat surface, a gap is formed between the ear dust and the side plate 61, and the wind wraps around the gap so that it is easily peeled off. . Further, since the protrusion 71 is formed long so as to be orthogonal to the direction in which the wind from the supply pipe 54 travels, the ear dust from which the wind from the supply pipe 54 tends to stick to the side plate 61. Is peeled off and promotes the downward fall of the ear dust.

  The ear dust is charged when it is cut by the cut blower 37, and when it comes into contact with the side plate 61, an electrostatic force is generated between the side plate 61 and the ear dust. This electrostatic force is inversely proportional to the square of the distance between the ear dust and the side plate 61. Therefore, the corrugated shape of the side plate 61 increases the distance between the ear dust and the side plate 61 as compared with the flat shape, thereby reducing the electrostatic force. As a result, the ear dust is easily separated from the side plate 61.

  Here, it is also conceivable to neutralize the pre-charged ear dust before the ear dust wind 85 is blown into the inner basket 52. However, compared to a sheet-like material such as the film 21, it is difficult to neutralize fine ear dust. Even if the charge removal is performed, it is difficult to remove the charges in the ear dust only by removing the charges on the surface of the ear dust.

  In the present embodiment, the separation target of the separator is the ear dust of the film. However, the separator is not limited to this, and may be a piece of waste, such as paper waste.

  Further, in the present embodiment, the shape of the inner cage is a square cylindrical shape, but is not limited thereto, and may be a cylindrical shape, an elliptical cylindrical shape, or other shapes. Further, the square tube is not limited to a quadrangle, and may be a triangle or other polygons.

  Further, instead of or in addition to the protrusions formed in the vertical direction, spot-like protrusions may be formed. The spot-like protrusions are configured in a conical shape, a pyramid shape, a hemispherical shape, and a spherical shape. Further, the spot-like ridges and the divided ridges may be arranged at random in accordance with the size of the cut ear dust.

It is the schematic which shows a film manufacturing line. It is the schematic which shows an air supply installation and its periphery. It is a longitudinal cross-sectional view which shows the separator of this invention. It is a front view which shows a side plate. It is a front view which shows an example of a punching metal. FIG. 5 is an enlarged cross-sectional view taken along line VI-VI in FIG. 4. It is a cross-sectional view which shows the separator of this invention. It is a cross-sectional view of a separator showing a stay area. It is a cross-sectional view of the separator for showing the behavior of the ear dust blown out from the supply pipe. It is a cross-sectional view showing a conventional separator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Film production line 38 Separator 52 Inner basket 53 Outer frame 54 Supply pipe 55 Shuter 58-61 Side plate 65 Fiberscope 73 Window 75 Flexible hose

Claims (11)

An inner cage having a bottom opening and at least a peripheral surface formed of a porous member; and an outer frame surrounding the inner cage and exhausting the air passing through the holes of the porous member. In the waste separation device that separates the air blown to the wind using the porous member and drops it downward,
A plurality of protrusions formed on the inner basket and projecting inward;
A waste separation device comprising: a supply pipe for blowing the waste in a substantially horizontal direction along an inner peripheral surface of the inner basket.   2. The waste separating apparatus according to claim 1, wherein Lc ≧ P, where Lc is an average length of the waste and P is a pitch of the protrusions.   The waste separating apparatus according to claim 1, wherein the protrusion is a protrusion that is formed long so as to intersect a traveling direction of the wind from the supply pipe.   A shooter is provided below the inner cage through the opening, and the shooter has a plurality of chute surfaces for guiding the waste downward, and is located at a position where the wind stays among the plurality of chute surfaces. 4. The waste separating apparatus according to claim 1, wherein an inclination angle of the chute surface with respect to a vertical direction is made smaller than that of the other chute surfaces.   The waste separating apparatus according to any one of claims 1 to 4, wherein a direction adjusting member that adjusts a blowing direction of the wind is attached to a tip of the supply pipe.   The waste separating apparatus according to any one of claims 1 to 5, further comprising monitoring means for monitoring the inside or the outside of the inner basket.   The waste separating apparatus according to claim 6, wherein the monitoring unit is a transparent window provided in the outer frame.   The waste separating apparatus according to claim 6, wherein the monitoring unit is a fiberscope, and a tip end of the fiberscope is provided inside the inner basket.   The scrap separation device according to any one of claims 1 to 8, wherein a diameter of the hole of the porous member is 1 mm or more and 5 mm or less, and an opening ratio per unit area is 30% or more and 60% or less. An inner cage having an opening at the bottom and at least a peripheral surface formed of a porous member; and an outer frame surrounding the inner cage and exhausting the wind that has passed through the holes of the porous member. In the waste separation method for separating the waste blown to the wind using the inner basket and dropping it downward,
With the supply pipe for blowing the waste into the inner basket, the waste is blown in a substantially horizontal direction along the inner peripheral surface of the inner basket.
A waste separation method, wherein the waste is brought into contact with a plurality of protrusions formed to protrude inward from the inner basket and separated from the wind. A first step of blowing a side end portion of a film cut from a continuously conveyed film into a long shape, and a wind for blowing the side end portion to a recovery unit using the first step. In the sending method,
A wind-feeding method characterized in that the side edge portion is cut finely into ear dust, and the ear dust is separated from the wind using the waste separation method according to claim 10.

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