JP4250107B2 - Film stretching machine - Google Patents

Description

The present invention relates to a film stretching machine for producing a high-performance film, and more particularly to a small-sized film stretching machine for producing a small amount of various types of optical films.

  Polymer films used in the optical field are manufactured by a melt film forming method or a solution film forming method. The melt film-forming method is a method for producing a film by heating and melting a polymer in a powder or pellet form, extruding the polymer as a thin film and cooling it. On the other hand, in the solution casting method, a polymer is mixed with a solvent to form a dope, the dope is cast from a die to a casting support, and the casting film is peeled off when it has self-supporting property, and then dried. It is made into a film by drying in the process. The casting support is a drum or band that continuously rotates.

  Various polymers are used for these films. Among them, cellulose acylate has transparency and appropriate moisture permeability, high mechanical strength, and dimensional stability. Due to its low humidity dependency and temperature dependency, it is widely used in the optical field. And when forming a cellulose acylate into a film, a solution casting method is often applied.

  In this solution casting, a method for manufacturing a long film (hereinafter referred to as a continuous method) is generally used, and here, a conventional solution casting apparatus will be described with reference to FIG. . FIG. 17 is a schematic view of a conventional continuous solution casting apparatus. The conventional continuous solution casting apparatus 200 includes a casting apparatus 201, a drying / stretching apparatus 202, a roller drying apparatus 203, and a winding apparatus 204.

  The casting apparatus 201 includes a casting support (hereinafter referred to as a support) 206 and a casting die 207. The drying and stretching apparatus 202 is also called a tenter apparatus, and includes an air conditioner (not shown) for ventilating the inside of the apparatus. A roller 209 for supporting the film is used between these apparatuses and inside the apparatus as necessary.

  In the casting apparatus 201, the dope 212 is cast from a casting die 207 on a support 206 such as a drum to form a casting film. Then, the cast film is peeled off from the support 206 as a film 213 containing a solvent and conveyed to the drying and stretching apparatus 202. The drying and stretching apparatus 202 includes a plurality of drying parts A1 to An continuously, and the drying air is blown onto the film 213 in these drying parts A1 to An. Conditions such as the temperature and speed of the drying air in the drying sections A1 to An are independently controlled, and the film 213 containing the solvent is dried while being transported downstream with both end portions held. In addition, a tenter clip, a holding pin, or the like is used as a holding means (not shown) for holding both side ends. The drying / stretching apparatus 202 dries the film 213 being conveyed and stretches the film in a predetermined direction. The holding unit releases the holding of the film 213 at a predetermined position near the outlet of the drying and stretching apparatus 202.

  The drying device 203 further evaporates the solvent while transporting the film 213 that has passed through the drying and stretching device 202 with a roller 203a or the like, and advances the drying of the film 213. At this time, a surface treatment means (not shown) may be provided in the drying apparatus 203 to perform a predetermined surface treatment. The air conditioner is provided with a gas concentration sensor and a temperature sensor, and detects the solvent gas concentrations inside the drying stretching apparatus 202 and the drying apparatus 203 and the respective internal temperatures. The air conditioner is further provided with a controller (not shown), and this controller controls the operating conditions of the air conditioner according to the detection results of the gas concentration sensor and the temperature sensor. The solvent gas concentration and temperature with the apparatus 203 are controlled. In the winding device 204, the both ends of the dried film 213 are cut by the cutting unit 216 so as to have a predetermined width, and then wound by the winder 217. Such a continuous solution film-forming facility is suitable for mass production with uniform film-forming conditions, and is proposed in, for example, Patent Document 1.

JP 2002-265636 A

However, in recent years, it is necessary to produce various kinds of films according to applications and users, and they are often in small amounts. In the case of manufacturing such a small amount and a variety of products, the continuous solution film formation as proposed in Patent Document 1 has the following problems.
(1) The raw material loss rate is high because the required amount of raw materials is large with respect to the production amount of one kind.
(2) Of the manufacturing conditions, it is difficult to change the drying conditions depending on the product, and the time loss involved in changing the conditions is large. Furthermore, it is difficult to change the conditions greatly.
(3) Even in the case of manufacturing a small amount of product, first, stable manufacturing is performed under basic conditions, and then the method is changed to the manufacturing conditions of the target product. Therefore, the time required for stable film formation is long. In addition, the film may be cut without being able to be stably formed, and in that case, it takes a lot of manpower and time to restore the operation.
(4) The stretching direction in the dry stretching apparatus is limited to either the width direction or the transport direction.
(5) Even when it is desired to change the drying conditions for each product, the drying conditions are restricted due to the equipment configuration.
(6) The equipment is large.

In view of the above-mentioned problems, the present invention can produce a wide variety of high-efficiency and high-efficiency films that are scaled in any direction and quantity while drying, and can be scaled even in a dried film. An object of the present invention is to provide a small-sized film stretching machine .

In the film stretching machine of the present invention, a sheet is formed by a cutting means for cutting a film from a long shape into a sheet shape, and a plurality of holding members that are separated in a direction perpendicular to the stretching direction and displaceable in a direction perpendicular to the stretching direction. An expansion / contraction device comprising a first stretching portion that holds the film and extends the sheet-like film in a first direction, and a second stretching portion that extends in a second direction orthogonal to the first direction, and the expansion / contraction A drying chamber provided so as to cover the apparatus and having an internal temperature controllable; and a turntable for rotatably holding the expansion / contraction apparatus in a plane including a first direction and a second direction. The sheet expansion film is rotated by a predetermined angle by the turntable, and then the sheet-like film cut by the cutting means is held and stretched in the first and second directions.

A plurality of the drying chambers are provided, and the plurality of drying chambers have an automatic door whose opening / closing is controlled by a door opening / closing mechanism at a doorway of the film.

  Furthermore, the present invention is provided so as to be movable between the plurality of drying chambers, and is arranged to penetrate the plurality of drying chambers, and a moving table on which the first extending portion and the second extending portion are attached. First to third shift shafts, a motor disposed outside the plurality of drying chambers, and individually rotating the first shift shaft to move the movable table between the plurality of drying chambers; Arranged outside the drying chamber and individually rotating the second shift shaft to drive the first extension unit, and arranged outside the plurality of drying chambers, and individually connecting the third shift shaft. And a motor for driving the second extension part.

In addition, it is preferable that the said cutting | disconnection means is provided in at least 1 inside of the said drying chamber. Moreover, it is preferable to have a liquid contact means for making the film before the drying contain a solvent or water in advance.

  According to the present invention, the film stretching machine can be made smaller than conventional ones, and the film can be uniaxially or biaxially stretched in an arbitrary direction, and can be manufactured in a small amount and a variety of products with high efficiency. Further, according to the film stretching machine of the present invention, the dried film can also be stretched.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic plan view showing a part of the solution casting equipment embodying the present invention, and FIG. 2 is a schematic side view showing a part of the solution casting equipment. The solution casting apparatus 10 includes a casting machine 11, a drying stretcher 12, and a winder 13. Inside and between these machines, rollers 17 are provided for transporting or supporting the film 16 as necessary, but only a part of them is shown in FIG. 1 to avoid complexity. Yes. The range from the casting machine 11 to the drying and drawing machine 12 is a closed system as shown by the broken line in FIG. 1, and this controls the temperature and pressure from the casting time to the loading into the drying and drawing machine 12. In addition to being easy, it is possible to prevent dust or the like from entering or adhering to the film 16. In the following description, the direction in which the film 16 is conveyed from the casting machine 11 to the winder 13 is referred to as the direction x in the X-axis direction, and the direction along the width direction of the film 16 is referred to as the Y direction. is there.

  The casting machine 11 includes a casting die 18 and a drum 19. The casting die 18 is for casting a dope sent from a supply source onto a drum 19, and the drum 19 is a casting support. Instead of the drum 19, a band that is supported by a backup roller and continuously conveyed may be used. The casting die 18 has a temperature controller (not shown) for controlling the dope to be cast to a predetermined temperature, and the drum 19 is also a temperature controller for controlling the drum surface as a casting condition. (Not shown).

  The drying and stretching machine 12 has first to third drying chambers 21 to 23, and these drying chambers 21 to 23 are opened and closed by drying chamber bodies 25 to 27 and a door opening / closing mechanism 30 (see FIG. 2), respectively. And automatic doors 31 to 35 to be controlled. The door opening / closing mechanism 30 is controlled by a controller 38 that can be programmed as required for opening / closing the automatic doors 31-35. In the present embodiment, the first drying chamber 21 is used as a film transfer section. For this reason, a film loading port 21a and a loading port 21b are provided in the first drying chamber. Open and close. Then, the film 16 is carried in from the casting machine 11 and carried out to the winder 13. The automatic door 33 is provided so that it can be opened and closed when the internal state of the first to third drying chambers 21 to 23 is checked or cleaned as necessary. The automatic doors 34 and 35 provided between the first to third drying chambers 21 to 23 are responsible for opening and closing the drying chambers, and are opened and closed as necessary. The drying chambers 21 to 23 are independent. As a result, the internal environment is controlled. In addition, you may increase an automatic door to a required location so that the 1st-3rd drying chambers 21-23 may have mutual compatibility and those relative positions can be changed suitably. Further, the number of drying chambers is not limited to 3, and it is preferable to increase or decrease appropriately.

  Each of the drying chambers 21 to 23 includes a sensor 41 and a controller 42 for independently controlling each internal environment. In the first to third drying chambers 21 to 23, the water and the solvent are evaporated from the film 16 containing the water and the solvent as described later, so that the water and the solvent become gas. Then, the sensor 41 appropriately detects the temperature and humidity or the solvent gas concentration inside each drying chamber 21 to 23. The first to third drying chambers 21 to 23 are controlled by the controller 42 according to the detection result of the sensor 41 so as to satisfy predetermined conditions regarding temperature, humidity, and solvent gas concentration.

  As shown in FIG. 2, the first drying chamber 21 has two drying nozzles on the peeling surface side of the film 16 from the drum 19 (hereinafter simply referred to as the peeling surface side) and the anti-peeling surface side. The peeling surface side drying nozzle (also referred to as the upper nozzle) is denoted by reference numeral 45, and the anti-peeling surface side drying nozzle is denoted by reference numeral 46. The drying nozzles 45 and 46 perform air replacement inside the first dryer 21 and temperature control under the condition control of the controller 42.

  The first drying chamber 21 is provided with a cutting blade 51 and a moving expansion / contraction device 52 in order to cut the film 16 and stretch or shrink in any direction. A pair of cutting blades 51 are provided at the upstream end and the downstream end of the drying nozzle 45, and the transported long film 16 is cut in a direction along the width direction to form a sheet. . Note that the cutting blade 51 may be provided not on the drying nozzle 45 but on the moving table 56 of the moving expansion / contraction device 52.

  The moving expansion / contraction device 52 includes a moving table 56 provided on a moving shaft 53a (see FIGS. 3 to 5), and first pins 57a and 57b and second pins 71a and 71b for holding a film. Yes. The moving table 56 moves between the first to third drying chambers 21 to 23 by the moving shaft 53a. The first pins 57a and 57b are provided on the moving base 56 via the first pin bases 58a and 58b. The first pins 57a and 57b and the first pin bases 58a and 58b are separated by 2 in the X-axis direction. One is provided. One first pin 57a is provided on a first pin base 58a (see FIGS. 3 and 6) that can be displaced on the moving base 56 as will be described later, and the other first pin 57b is It is provided on a first pin table 58 b fixed to the moving table 56. Thereby, the front-end edge part and rear-end edge part of the sheet-like film 16 cut | disconnected with the cutting blade are hold | maintained by 1st pins 57a and 57b. Similarly, as shown in FIG. 6, the second pins 71a and 71b are provided on the moving base 56 via the moving second pin base 72a and the fixed second pin base 72b, and the second pin base 72a, Two 72b are provided apart in the Y-axis direction. Thereby, the both-sides edge part of the sheet-like film 16 cut | disconnected with the cutting blade is hold | maintained by 2nd pin 71a, 71b.

  FIG. 6 is a schematic plan view showing the pins 57a, 57b, 71a, 71b and the pin stands 58a, 58b, 72a, 72b for supporting the pins 57a, 57b, 71a, 71b. Rails 58c and 72c are formed, and the pins 57a, 57b, 71a and 71b are movable in the X-axis or Y-axis direction by the holding rails 58c and 72c. A plurality of pins 57a, 57b, 71a, 71b are planted for each block, so that, as will be described later, each pin 57a, 57b, 71a, Since 71b moves moderately according to the expansion / contraction of the film 16, tearing from the film edge is suppressed. These pin blocks are set at regular intervals in the rails 58c and 72c by a pin block initial position setting means (not shown) before gripping the film. After this setting, the rails 58c and 72c are freed. Instead of the block-unit pins 57a, 57b, 71a, 71b moving on the rails 58c, 72c as described above, a fixed type in which the pins are simply arranged on the pin base may be used. The pins and pin bases are given suffixes a and b to explain the expansion / contraction operation. However, when it is not necessary to individually identify these, symbols 57 and 71 in which the suffixes a and b are omitted as a general term. Etc. may be used.

  The drying nozzle 45 can be displaced in a vertical direction between a predetermined drying position and a cutting position by an elevating mechanism 61, and has a pusher 62 for piercing the film 16 on the pin 57 at the side edge. Yes. In addition, the distance with the film 16 of the drying nozzle 45 is detected by the sensor 63, and the raising / lowering mechanism 61 controls the position of the drying nozzle 45 based on the detection result.

  Similarly to the first drying chamber 21, the second and third drying chambers 22 and 23 have two drying nozzles on the peeling surface side and the anti-peeling surface side of the film 16, respectively. 1 is omitted, and only the drying nozzle on the peeling surface side is shown by reference numerals 65 and 66 in FIG. In the present embodiment, in order to cut the film 16 in the first drying chamber 21 as will be described later, the cutting blade 51 and the pressing tool 62 are provided on the peeling surface side drying nozzles 65 of the second and third drying chambers 22, 23. 66 is provided only for the drying nozzle 45 of the first drying chamber 21, and the drying nozzles 65 and 66 do not have a shift mechanism for displacement. The cutting, stretching, and shrinking of the film 16 will be described in detail later using another drawing.

  The first to third drying chambers 21 to 23 not only bear drying at a high temperature but also have a cooling function. With this cooling function, the film 16 can be controlled to be in a predetermined state with respect to hardness or the like. Furthermore, at least one of the drying nozzle pairs in the first to third drying chambers is also provided with a pressure reducing mechanism for reducing the pressure in the drying chamber, and the pressure reducing conditions are controlled by the controller 42.

  A collection device 69 for collecting the film 16 is installed on the upstream side of the first drying chamber 21 into which the film 16 is carried. The upper portion of the recovery device 69 is opened, and when the film 16 is cut by the cutting blade 51, the film 16 upstream of the first drying chamber 21 falls due to its own weight, and therefore receives the dropped film 16. . Further, the winder 13 includes a winding shaft 68 for winding the film 16 containing moisture or a solvent, and is cast by a controller (not shown) for controlling the rotation speed of the winding shaft 68. The winding speed can be controlled independently of the casting speed in the machine 11.

  Next, the drying nozzle 45 and the moving expansion / contraction device 52 will be described in detail with reference to FIGS. 3 and 4 are views showing the drying nozzle 45 and the moving expansion / contraction device 52 of the first drying chamber 21, FIG. 3 is a cross-sectional view along the X direction, and FIG. 4 is a line AA in FIG. FIG. FIG. 5 is an explanatory view showing the movement of the moving enlargement / reduction apparatus 52 and the film enlargement / reduction method. As shown in FIGS. 3 and 4, the moving expansion / contraction device 52 is arranged in the Y-axis direction in addition to the first pins 57 a and 57 b for expanding and contracting the film 16 carried into a predetermined drying chamber in the X-axis direction. Second pins 71a and 71b for expanding and contracting are provided. The first pin base 58a on which the first pin 57a is provided is provided on the rail 73 so that it can be displaced in the X-axis direction, and the second pin on which the second pin 71a is provided. The base 72a is provided on the rail 74 so that it can be displaced in the Y-axis direction.

  As shown in FIG. 5, the moving table 56 of the moving expansion / contraction device 52 is provided with a moving mechanism 77 for moving the first pin table 58a in the X-axis direction. In this embodiment, as the moving mechanism 77, a spline shaft 77a, a ball spline 77b, and a worm gear 77c, which are well-known shift mechanisms, are used to drive the spline shaft 77a by the motor 80. The first pin base 58a is displaced in the X-axis direction by rotating the screw rod 77d via the worm gear 77c. The driving of the motor 80 is controlled by the controller 81. The moving mechanism 77 can be connected to the cutting blade 51 and the pressing tool 62 provided on the drying nozzle 45 as necessary, and the positions of the cutting blade 51 and the pressing tool 62 provided on the rail 78 are also determined. Can be adjusted. The moving mechanism 77 expands and contracts the film 16 in the X direction. In the present embodiment, the first pin base 58b is fixed to the moving base 56, and only the movable first pin base 58a moves to expand or contract the film 16, but both the first pin bases 58b. An expansion / contraction function may be provided by making 58a and 58b movable.

  4 and 5, the moving table 56 of the moving expansion / contraction device 52 includes a moving mechanism 84 having a ball screw 84a as a shift shaft and a female screw 84b screwed to the ball screw 84a. The second pin base 72a is connected to the female screw 84b. The ball screw 84a is driven by the motor 85 via the shift mechanism 84c, and the female screw 84b is displaced in the Y direction. The shift mechanism 84c includes a spline shaft and a ball spline. The drive of the motor 85 is controlled by the controller 86. Accordingly, the second pin base 72a having the second pin 71a can move in the Y direction. The moving mechanism 84 can be connected to the pressing tool 91 provided in the drying nozzle 45 extending in the X direction as necessary, and the position of the pressing tool 62 provided on the rail 92 is also adjusted. can do. Accordingly, the moving mechanism 84 is responsible for the expansion and contraction of the film 16 in the Y direction. In the present embodiment, one of the second pin bases 72a is movable and the other second pin base 72b is fixed and the film 16 is expanded / contracted. However, both of the second pin bases 72 are movable to expand / contract. You may make it perform.

  The moving expansion / contraction device 52 further includes a female screw 53b that is screwed into a ball screw that is a moving shaft 53a. By this moving mechanism 53, the female screw 53b comes into contact with a stopper 95 provided inside the first drying chamber. It moves from the position to a predetermined location inside the third drying chamber. At this time, the moving shaft 53a is driven by a motor 96, and the driving of the motor 96 is controlled by a controller 97. Thereby, the moving expansion / contraction device 52 moves in an arbitrary range from the first drying chamber 21 to the third drying chamber 23.

  The motors 80, 85, and 96 are provided outside the first to third drying chambers 21 to 23, thereby preventing an influence on the internal temperature of each of the drying chambers 21 to 23, and for each drying chamber. The deterioration of the function of the motor itself due to the temperature change of 21 to 23 and adverse effects due to thermal expansion are prevented. Controllers 81, 86, and 97, a controller for rotating the drum 19 (not shown), controllers 38 and 42 for automatic doors and drying nozzles (see FIGS. 1 and 2), and for rotating the take-up shaft In this embodiment, all the controllers (not shown) are integrated as one control mechanism. Thereby, it is possible to take a form in which all these control conditions are programmed in advance, but the present invention is not limited to this embodiment, and each may be programmed independently.

  Next, the operation of the present invention will be described. When the film 16 is manufactured by the solution casting apparatus 10 described above, first, the dope sent from the dope supply source to the casting die 18 is transferred from the casting die 18 onto the drum 19 by a predetermined method. Cast. As the casting method, for example, there are a method of free-falling on the surface of the drum 19 and a method of applying a predetermined pressure to the dope inside the casting die 18 and discharging it in the direction of the drum 19. Various publicly known casting dies according to the rolling method can be applied and do not depend on the type. In the present embodiment, the drum 19 is rotated in the direction in which the peeling surface of the film 16 peeled off from the drum 19 is on the upper side, and continuous casting is performed. However, the present invention is not limited with respect to the rotation direction and the upper and lower sides of the peeling surface. . The casting speed set according to the rotation speed of the drum 19 can be changed as appropriate even during production, depending on the production method in the drying and drawing machine 21 provided downstream from the casting machine. The temperature of the casting die 18 and the drum 19 is set to a predetermined temperature suitable for casting by a predetermined temperature control method.

  The casting film 16a on the drum 19 is wound around the film 16 on the uppermost one of the plurality of rollers 17 installed downstream of the drum 19, and the roller 16 is driven to drive the film 16 in the conveying direction. While being peeled continuously by applying tension to the side, it is transported to a predetermined drying chamber among the first to third drying chambers 21 to 23. However, the peeling and transporting can be performed by providing a peeling or transporting unit different from the above, and applying a tension in the transporting direction to the film. The range from the casting machine 11 to the film carry-in port of the drying and drawing machine 12 is controlled as described above, thereby precisely controlling the casting conditions and the conveying conditions of the casting film 16a and the film 16. can do.

  In the following description, the case where the film 16 is transported to the first drying chamber 21 is exemplified, but the destination of the film 16 is set to the second or third drying chamber depending on the target processing conditions in the drying and stretching machine 12. In this case, the position of the drying chamber may be changed so that a predetermined drying chamber to be carried in is connected to the conveyance path of the film 16.

  The automatic doors 31 and 32 of the first drying chamber 21 are opened, and the film 16 is continuously conveyed from the first drying chamber 21 toward the winder 13. At this time, the drying nozzle 45 is set at a predetermined drying position. The conveyance speed of the film 16 is appropriately controlled according to the rotation speed of the drum 19 and the roller 17, the operating conditions of the winder, etc., and when the film 16 is stably conveyed, the conveyance speed is reduced and the film 16 is cut. Is carried out as follows.

  When the conveying speed is reduced, the drying nozzle 45 is displaced downward to hold the film 16 on the moving expansion / contraction device. At this time, the pressing device 62 provided in the drying nozzle 45 presses the film 16, and the film 16 is pierced and held by the pin 57. Further, the pressing tool 62, which is an elastic body, further presses the film. When the cutting edge of the cutting blade 51 comes into contact with the moving table 56 of the moving expansion / contraction device, the film 16 is cut into a sheet shape and held on the moving table 56. It becomes a state.

  In the present embodiment, the internal environment of the first drying chamber 21 in which cutting is performed can be controlled to the first condition that is the same as the environment at the time of casting or transporting to the first drying chamber. . At this time, it is preferable in terms of control efficiency that the automatic doors 33 and 34 are closed. For example, when the dope is cast on, for example, a drum cooled to −60 ° C. to 20 ° C. and the conveyance path to the first drying chamber 21 is set to the same temperature condition, the first drying chamber 21 is also at the same temperature. It can be a condition. Moreover, also when the temperature of a drum and the said conveyance path is set higher than room temperature, the 1st drying chamber 21 can be controlled to the same temperature conditions. The first and second pins 57 and 71, which are film holding members, are preferably set in advance to the same temperature as the temperature at the time of casting or in the conveyance path to the first drying chamber before holding the film. When holding the film, it is possible to prevent film deformation accompanying temperature change. For example, the moving expansion / contraction device 52 is placed in, for example, the third drying chamber 23 that is set to the above temperature condition for preventing deformation, and the automatic doors 34 and 35 are set while the film 16 passes through the first drying chamber 21. There is a method of opening and moving to the first drying chamber 21.

  When the cutting is finished, the cutting blade 51 and the pressing tool 62 move to the drying position together with the drying nozzle 45. The elongate film 16 on the upstream side of the sheet-like film has its tip portion dropped by its own weight, and the collecting device 69 receives this. The casting speed is kept small for a predetermined time. On the other hand, the long film on the downstream side of the sheet film 16 is wound around the winding shaft 68 of the winder 13 in a state containing a solvent and moisture. The wound film 16 is collected.

  While the film 16 is passed through the first drying chamber 21 and while the film 16 is cut into a sheet, the second and third drying chambers 22 and 23 are operated so as to satisfy predetermined film drying conditions. Can be kept. In that sense, it is preferable in terms of efficiency to keep the automatic doors 34 and 35 closed. The second and third drying chambers 22 and 23 can be set to different drying conditions so that the sheet-like film 16 can be quickly supplied under predetermined drying conditions.

  The drying and stretching or shrinking of the film 16 may be started in the first drying chamber carried in, or may be started in the second or third drying chamber 22 or 23. Since drying and stretching or shrinking are independently controlled as described above, either one or both can be performed at a predetermined timing.

  The film processing relating to the cutting into a sheet shape will be described below, but this is an example and the present invention is not limited to this. After the second drying chamber is stabilized in advance to the second condition which is a predetermined drying condition, the automatic door 34 is opened, and the sheet-like film 16 is moved to the second drying chamber 22 by the movement of the moving expansion / contraction device. When the moving expansion / contraction device 52 is set at a predetermined position in the second drying chamber 22, the automatic door 34 is closed. Since the inside of the second drying chamber 22 has already been stabilized to the second condition once, the return to the second condition is quick even when the automatic door is opened and closed. It will be dried by. When the automatic door 34 is closed, the first drying chamber is started to be controlled so as to be in a predetermined drying condition required later.

  When the sheet-like film 16 is dried or contracted in a predetermined direction in the second drying chamber 22, the predetermined pin base is moved without moving the moving base 56. For example, when extending or contracting in the width direction, that is, the Y direction, the motor 85 is driven so that the female screw 84b moves in the Y direction. On the other hand, when extending or contracting in the transport direction, that is, in the X direction, a motor 80 for displacing the first pin base 58a in the X axis direction is driven. Note that the X axis and the Y axis are orthogonal to each other. Further, when the film 16 is expanded and contracted at an angle in the direction having both the X-axis and Y-axis components, as will be described in detail later, a turntable capable of rotating the movable table 56 is provided. The film 16 is expanded and contracted in an arbitrary direction by providing and thereby rotating or moving the movable table 56 by a predetermined angle and then stretching or contracting.

  In the second drying chamber 22, after predetermined expansion / contraction, for example, the second drying chamber 22 is sent to the third drying chamber 23 which is controlled in advance to the third condition which is the next drying condition. When the film 16 is sent to the third drying chamber 23, the operation of the third drying chamber is first stopped and then the automatic door 35 is opened, as in the movement from the first drying chamber 21 to the second drying chamber 22. The moving expansion / contraction device 52 is moved. When the moving expansion / contraction device 52 is set at a predetermined position in the third drying chamber 23, the automatic door 35 is closed, and the operation is resumed so that the inside returns to the third condition. Thereby, the film 16 is immediately dried by the third condition. In the third drying chamber 23 as well, as in the second drying chamber 22, the film can be scaled in any direction. When the automatic door 35 is closed, the control may be started so that the second drying chamber has other drying conditions required later.

  Thus, a film is dried through the drying process which consists of a several drying step using combining the 1st-3rd drying chambers 21-23. At the same time, it undergoes predetermined stretching or shrinkage control. When all the drying and expansion / contraction is finished, the film 16 is returned to the first drying chamber, and the automatic door 33 is opened and taken out from here, or another winding shaft is set in the winding machine 13. And wind it up.

  Thus, in the present invention, even in the case of a film that requires a plurality of different drying conditions, the film is processed by quickly changing the drying environment from one drying condition to the next drying condition, and a predetermined drying process is performed. It passes. And during the drying process, during the movement between at least one of the first drying chamber to the third drying chambers 21 to 23 or between these drying chambers, it is stretched or contracted by the moving expansion / contraction device 52. In addition, when performing the film cutting into a sheet shape in any one of the drying chambers as in the present embodiment, it is preferable to perform the film cutting together with the start of holding in the moving expansion / contraction apparatus. In the above embodiment, the film is stretched while drying using a plurality of drying chambers. However, the plurality of drying chambers may be omitted, and the sheet-like film may be simply enlarged or reduced.

  In the above embodiment, the long film is cut inside the first drying chamber 21, but in the present invention, the moving expansion / contraction device moves the conveyance path from the downstream of the support to any one drying chamber. In addition to providing a separate moving means for this purpose and providing another cutting means instead of the cutting blade of the drying nozzle 45 in the upstream portion of the drying chamber, the film 16 before being carried into the drying chamber can be cut into a sheet shape. Good. In this case, the moving expansion / contraction apparatus may travel to a predetermined dryer while holding the sheet-like film and perform a predetermined drying process on the film. Moreover, in the said embodiment, although it cut | disconnects with a cutting means after casting and it is set as a sheet-like film and is expanded / reduced after this, instead of this, what was first cast continuously with the casting machine 11 is the drying chamber 21. After being dried in accordance with need, it is wound up by a winder 13, and the wound-up material is rewound and sent to a drying and stretching machine 12, where it is cut into a sheet and then subjected to an enlargement / reduction process. May be. In this case, instead of performing drying after casting in the drying chamber 21, a separate drying facility may be provided between the casting machine 11 and the winder 13, and drying may be performed using this drying facility. Good.

  The holding member for holding the film 16 may not be a pin and a pressing tool as in the present embodiment, and may hold the side edge portion of the film 16 so as not to adversely affect the product portion. That's fine. For example, as shown in FIGS. 7 to 9, a holding type integral clip 160 or a separation type clip 170 having the film 16 sandwiched in the vertical direction may be used. And it is preferable to hold | maintain the four corners or 4 sides of the side edge of the sheet-like film 16, and it is more preferable to use the holding member used as 4 sides hold | maintain among them.

  As shown in FIG. 7, the integrated clip 160 is a U-shaped clip frame 161 in which a clip main body 162 is rotatably attached by an attachment shaft 163, and an engaging member 164 is attached to an upper end portion 162 a of the clip main body 162. By engaging with the clip body 162, the clip body 162 can be selectively rotationally displaced between the clamping position shown in FIG. 5A and the clip opening position shown in FIG.

  As shown in FIGS. 8 and 9, the separation-type clip 170 is separated into an upper clip 171 and a lower clip 172, and the upper clip 171 is an upper clip gripping portion 173 provided in the upper nozzle 45. The upper part is held by and moves up and down. Further, the lower clip 172 is attached to the clip holding base 174 of the moving base 56. The upper clip 171 includes a clip body 175 having an L-shaped cross section, two clip shafts 176 attached to the clip body 175, and a coil spring 177 that is contracted between the clip shaft 176 and the clip body 175. And a clip main body presser 178.

  The lower clip 172 includes a lower clip body 180, a lock member 181, and a lock mechanism 182. The lower clip body 180 includes a shaft hole 183 into which the clip shaft 176 is inserted, and a film gripping portion 184. The lock member 181 is shifted by the lock mechanism 182 and is displaced between a lock position where the lock member 181 is engaged with the lock groove 176a of the clip shaft 176 and a lock release position extracted from the lock groove 176a. The lock mechanism 182 puts the lock member 181 in the lock groove 176a when the film pinching position is reached by the lowering of the clip shaft 176, and holds the film pinching state. Further, when the film clamping is released, the lock member 181 is extracted from the lock groove 176a by a lock release signal from a controller (not shown) to release the lock. Thereafter, the upper clip holding portion 173 of the upper nozzle 45 holds the upper end portion 176a of the clip shaft 176, and as the upper nozzle 45 moves up, the upper clip 171 is separated from the lower clip 172, and the holding of the film 16 is released. . Note that the lock mechanism 182 may be a mechanical type using a link mechanism or the like. In this case, a lever for detecting the insertion of the clip shaft 176 into the shaft hole 183 is provided, and the locking member is alternately switched between the lock position and the unlock position in conjunction with the insertion of the clip shaft 176. Constitute.

  Moreover, in the said embodiment, although the film 16 was expanded / contracted in the X-axis and Y-axis direction, it may replace with this and may expand / contract a film by arbitrary inclination angles. In this case, as shown in FIG. 10, the ring gear 301 and the turntable 302 are individually provided on the moving table 56 via the rotary shaft 300 so as to be freely rotatable, and between the moving table 56 and the turntable 302. The first clutch 303 is provided between the ring gear 301 and the turntable 302, and the second clutch 304 is provided. These clutches 303 and 304 are composed of, for example, locking pins 303a and 304a, and the locking pins 303a and 304a project so that the two members are linked and integrated. Further, since the locking pins 303a and 304a are immersed in the members, the linkage is broken and the two members can freely rotate. The ring gear 301 is formed with an arc-shaped elongated hole 301b so that the locking pin 303a does not rotate together with the ring pin 301a.

  Similar to the above embodiment, the first pin bases 305a and 305b and the second pin bases 306a and 306b are provided on the turntable 302, and one of the pin bases 305a and 306a is a shift shaft made of a screw rod. The other pin bases 305b and 306b are fixed. The shift shafts 307 and 308 are engaged with the ring gear main body 301 a via the intermediate gear 310 and the driven gear 311, and the shift shafts 307 and 308 are configured to rotate by the rotation of the ring gear 301. Further, a third clutch 313 and a fourth clutch 314 are connected to the shift shafts 307 and 308, respectively, to turn on / off drive transmission from the ring gear 301.

  A worm wheel 315 is attached to a part of the ring gear 301 in a range of 180 degrees, for example, and a worm gear 318 attached to the spline shaft 316 via a ball spline 317 is engaged with the worm wheel 315. When the spline shaft 316 rotates in the forward direction or the reverse direction, the ring gear 301 rotates through the ball spline 317 and the worm gear 318. At this time, the first clutch 303 is turned off, and the turntable 302 is rotatable. Further, the second clutch 304 is turned on, and the ring gear 301 and the turntable 302 are integrated, whereby the turntable 302 can be rotated. Since the relationship between the rotation amount of the spline shaft 316 and the rotation angle of the turntable 302 is obtained in advance, the spline shaft 316 is rotated so as to obtain a desired rotation angle, and the turntable is positioned at an arbitrary rotation angle. . Thereafter, the first clutch 303 is turned on to integrate the moving table 56 and the turntable 302. Next, after the second clutch 304 is turned off to release the integration of the ring gear 301 and the turntable 302, the third clutch 313 or the fourth clutch 314 is selectively turned on, and the first pin base 305a. Alternatively, the sheet film 16 is expanded or contracted by moving the second pin base 306a. Note that the ball spline 317 and the worm wheel 315 slide on the spline shaft 316 as the moving table 56 moves. Further, instead of changing the rotation angle based on the rotation amount as described above, a sensor may be provided for each inclination angle used in advance, and the rotation amount of the spline shaft 316 may be controlled based on the sensor output.

  In the film expansion / contraction process, the rotation of the driven gear 311 is transmitted to the shift shafts 307 and 308 when the third clutch 313 or the fourth clutch 314 is turned on. Further, when the clutches 313 and 314 are turned off, the linkage between the driven gear 311 and the shift shafts 307 and 308 is cut off, and the driven gear 311 simply idles and rotation is not transmitted to the shift shafts 307 and 308. Therefore, by alternately switching the third or fourth clutch 313, 314, the first movable pin base 305a and the second movable pin base 306a can be gradually moved, and thereby the film 16 can be expanded and contracted. .

  Instead of rotating the turntable 302 with one spline shaft 316 and shifting with the first and second movable pin bases 305a and 306a as described above, the rotation of the turntable 302 with separate spline shafts. And the shift of each movable pin base 305a, 306a may be performed individually.

  In the above embodiment, the table is moved and expanded / reduced between the drying chambers via the moving shaft 53a and the spline shafts 77a, 316, etc. Alternatively, a drive source such as a pneumatic cylinder may be provided to move or expand / contract the table. In this case, a heat-resistant drive source is used or the drive source is covered with a heat insulating cooling wall so as not to be affected by heat from the drying atmosphere in each drying chamber.

  In addition, you may provide another process to the manufacturing apparatus quoted in said embodiment. An example is shown in FIGS. FIG. 14 is a plan view of a manufacturing apparatus in which another process is newly added to the facility of the previous embodiment, and FIG. 15 is a cross-sectional view taken along the line BB in FIG. 14 and 15, members similar to those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

  In the film manufacturing equipment 101 of the present embodiment, as shown in FIG. 14, a supply device 103 for successively supplying the moving expansion / contraction frame 102 to the third drying chamber 23, and a vapor deposition device 105 downstream of the third drying chamber 23. A coating device 106, a drying device 107, and an integrated punching device 108. Each device is divided so that the internal environment can be controlled independently, and has an automatic door 111 between them. The internal environment here is mainly temperature, and the other is humidity and solvent gas concentration. In order to control the internal environment, a sensor and a controller are provided, but the illustration is omitted. The standby area 112 between the third drying chamber 23 and the vapor deposition apparatus 105 and the vapor deposition apparatus 105 are each divided into two, and the respective codes are 112a, 112b, 105a, 105b.

  The moving expansion / contraction frame 102 has a pin 116 for holding the film 115 in the same manner as the movement expansion / contraction device 52 (see FIGS. 2 to 4) in the previous embodiment. However, the pins 116 hold four corners instead of the four sides of the sheet-like film 115. The frame shape is for punching the film 115 to a predetermined size within the frame in the integrated punching device 108, but this shape is not limited.

  The supply device 103 includes a supply unit 118 that sends the moving expansion / contraction frame 102 onto the conveying roller 117, and the supply member 118 a performs gripping of the moving expansion / contraction frame 102 and releasing of gripping on the roller 117. In the present embodiment, the roller 117 is used as a transport unit for transporting the moving expansion / contraction frame 102, but the present invention is not limited to this, and may be replaced with a transport belt, for example.

  Any one of the first to third drying chambers 21 to 23 is provided with a frame moving unit 121. The frame moving unit 121 moves the expansion / contraction moving frame 102 between the first to third drying chambers. . The frame moving unit 121 is formed with an interlocking unit (not shown) for expanding and contracting the pin 116, and the pin of the expansion / contraction moving frame 102 mounted on the frame moving unit 121 is driven from the interlocking unit. And the film 115 is enlarged or reduced. Further, the frame moving unit 121 includes a transport member (not shown) for transporting the dried and expanded / contracted film 115 to the standby area 112 together with the expansion / contraction moving frame 102.

  The standby area 112 is a section for adjusting the temperature of the film 115 that has undergone drying and expansion / contraction so that the temperature is optimal for vapor deposition, which is the next step. And the vapor deposition apparatus 105 gives the vapor deposition film which consists of a predetermined raw material to the film 115 by the vapor deposition part 105c, and is provided with the air suction port 105d for decompressing the inside.

  The coating device 106 is provided with a coating die 106a for coating the film 115 with a coating solution, and the drying device 107 has an air supply port 107a for supplying air to the inside to dry the coating film. ing.

  The integrated punching device 108 is provided with a punching unit (not shown) for punching the film after drying while holding it on the moving expansion / contraction frame 102, and punches the film 115 along the punching line 115a. Then, the stacking and punching device 108 stacks the film 115 at a predetermined position, and conveys the moving expansion / contraction frame 102 after punching to a predetermined position downstream of the punching place.

  A roller 117 similar to that provided in the supply device 103 is provided between the devices from the standby area 112 to the stacking punching device 108 and in each device as necessary, and the moving expansion / contraction frame 102 is moved. .

  The operation in this embodiment will be described below. Since the operation from the casting machine 11 to the first drying chamber is the same as in the previous embodiment, the description thereof is omitted here. The moving expansion / contraction frame 102 is supplied from the supply device 103 to the third drying chamber 23 until the casting and the conveyance in the first drying chamber are stabilized. The frame moving unit 121 is moved to the third drying chamber 23 before or simultaneously with the supply. Then, the moving expansion / contraction frame 102 is set on the frame moving unit 121, and the temperature of the third drying chamber 23 is controlled so as to obtain a temperature state suitable for holding the film 115. This control may be performed by moving the moving expansion / contraction frame 102 to the second drying chamber 22 without performing it in the third drying chamber 23.

  When the film conveyance in the first drying chamber is stabilized, the automatic door 34 is opened, and the temperature-controlled moving expansion / contraction frame 102 is moved to the first drying chamber 21 by the frame moving unit 121. And after closing the automatic door 34, the film 115 is cut | disconnected to a sheet form similarly to previous embodiment, and drying and expansion / contraction are implemented. Since cutting, drying, and expansion / contraction are the same as in the previous embodiment, description thereof is omitted.

  The film that has been dried and enlarged / reduced is conveyed from the third drying chamber 23 to the standby area 112 while being held by the moving enlargement / reduction frame 102 and adjusted to a predetermined temperature. After the temperature is adjusted, a predetermined metal is deposited by the vapor deposition apparatus 105 while being held by the moving expansion / contraction frame 102, a vapor deposition film is applied, and the film is conveyed to the coating apparatus 106. When the coating film is applied, the coating film is dried by the drying device 107, punched to a predetermined size by the stacking punching device 108, and stacked as a product at a predetermined position.

  In each of the above-described two embodiments, there are three drying chambers, so that at least one drying chamber for cooling and at least one drying chamber for heating can be set. However, depending on the target film, it may be necessary to carry out drying or expansion / contraction under multi-stage drying conditions. In such a case, the number of drying chambers is any number of four or more. It is preferable. Further, as in the second embodiment, when a post-process is selectively required in the sheet-like film that has undergone a predetermined drying condition, the predetermined drying chamber includes an appropriate post-process in the drying chamber. In addition, the sheet-like film that does not require a post-process can be obtained by connecting another drying chamber to an accumulator or the like. Alternatively, if it is desired to change the type of post-process for each sheet-like film, it is possible to produce various types of post-processed sheet-like films by connecting a plurality of drying chambers and post-processes. it can.

  Further, there may be only one drying chamber, and an embodiment thereof will be described here. That is, also in this embodiment, it can cast into a long shape to make a film, cut into unit lengths in the longitudinal direction to form a sheet, and manufacturing conditions can be changed for each sheet-like film. This method is referred to herein as a unit continuous type. 16 and 17 show an outline of the unit continuous solution casting apparatus, FIG. 16 is a side view including a partial cross section, and FIG. 16 is a plan view. As shown in FIGS. 16 and 17, the unit continuous solution casting apparatus 130 includes a casting apparatus 131, a drying stretching apparatus 132, and a winding apparatus 133.

  The casting apparatus 131 includes a support 136 and a casting die 137. The drying / stretching apparatus 132 is provided with a door 132a as an inlet of the film 140, a door 132b as an outlet, and a door 132c as a sampling port for sampling as necessary. These doors 132a to 132c are Opening and closing is automatically controlled by a controller (not shown). Further, inside the drying and stretching apparatus 132, ducts 141 and 142 are provided on both sides of the film 140, and cutting blades 134a and 134b as cutting means are provided on the film side of the duct 141 and a fixed expansion / contraction machine 146 described later. At least one of them is provided. As this cutting blade, various known cutting blades may be used. For example, as shown in FIG. 16, an inner blade 134a and an outer blade 134b may be used, or a saw-like shape provided on the fixed expansion / contraction machine 146 may be used. It may be a cutting blade. The cutting blades 134 a and 134 b cut the film 140 when the duct 141 is lowered. The ducts 141 and 142 are connected to the blower 145, and the wind from the blower 145 is controlled in temperature and wind speed by a controller (not shown). Thereby, as for the drying extending | stretching apparatus 132, internal temperature and replacement | exchange of internal gas are controlled. Further, the duct 141 on the upper side of the film 140 can be displaced in the vertical direction by a shift portion (not shown), thereby adjusting the wind pressure with respect to the film 140.

  The dry stretching apparatus 132 further includes a fixed expansion / contraction machine 146 for stretching the film 140 while holding four sides or four corners. The fixed expanding / contracting machine 146 holds a holder (not shown) that is displaced while holding both end portions of the film 140, a shift unit (not shown) that displaces the holder, and a shift unit that controls the holder. And a controller (not shown) for adjusting the displacement of the tool. The holder can be displaced in the running direction of the film 140, that is, in the casting direction during casting and in the width direction, thereby stretching or shrinking the film 140 in the width direction or running direction. A roller 147 for supporting the film 140 is installed between the apparatuses or in the apparatuses as necessary.

  When a film is manufactured using such an apparatus 130, the dope 148 is cast from the casting die 137 onto the support 136 in the casting apparatus 131. The cast dope 148 becomes a cast film 148a, and the cast film 148a is peeled from the support 136 as a film 140 containing a solvent, and sequentially introduced into the dry stretching apparatus 132 by a predetermined length. The portion of the film 140 introduced into the dry stretching apparatus 132 is cut into a sheet shape by the cutting blades 134a and 134b as cutting means inside the dry stretching apparatus 132, and at the same time, the four corners or both end portions, or The front end and the rear end in the traveling direction are gripped by a clip and dried while being expanded or contracted in the width direction or the traveling direction. Instead of the clip, a pin as shown in the previous embodiment may be used to hold the film by piercing the film. The drying conditions controlled by the blowing temperature and the wind speed are changed over time according to the expansion / contraction state and the progress of drying. When the film 140 reaches a predetermined expansion / contraction state and a dry state, the film 140 is conveyed downstream by a predetermined length, and the film 140 for the next unit length is introduced into the drying / stretching device 132 and is similarly expanded / contracted. Drying is done. In this way, the long film 140 is cut for each unit length and dried and scaled in sequence, and when reaching the take-up device, both end portions are cut by the cut portion 151 to form the take-up shaft 152. It is wound up.

  Moreover, this invention is not limited to the application to the continuous manufacture from a casting process, For example, it can apply also to expansion / contraction of the film etc. which were once dried and wound around the winding axis | shaft. A film once dried and wound on a winding shaft or the like usually contains almost no solvent or moisture, and even if it contains a little amount, it is too hard to expand or contract. Therefore, the film is continuously unwound from a take-up shaft, etc., and the film is softened by bringing a solvent, water, or the like into contact with the film under predetermined conditions. It is good to do. Examples of the method of bringing the solvent or water into contact with the film include film immersion in these liquids, spraying on the film, or application. Alternatively, the film may be softened by heating without contact with a solvent or water. In this case, for example, the film may be preheated before being introduced into the dry stretching machine, or the film may be expanded and contracted after being heated in the dry stretching machine. As a method for heating the film, there are a method of supporting the film with a heated roller, a method of using a heating tank, and the like. Moreover, in order to soften a film, you may use together the contact process with the said liquid, and heat processing.

  In addition, the film once dried may be subjected to the above-described softening process in a state where, for example, the four corners are held after being formed into a sheet shape. For example, in the second embodiment, the softening process is connected to any one of the drying chambers, and after the film is held by the moving expansion / contraction frame, the sheet-like film is conveyed to the softening process while being held. Then, after passing through the softening process, it is returned to the connected drying chamber, and predetermined drying and expansion / contraction are performed.

  According to the present invention as exemplified in the above embodiments, the following effects can be obtained. First, the film production facility of the present invention efficiently cuts a solvent-containing film into a sheet and stretches or shrinks each sheet, thereby changing the drying conditions for each sheet, and efficiently producing a small variety of products. Can be implemented. The film can be stretched or shrunk in both the width direction and the direction perpendicular thereto, and can be expanded and contracted in any direction by rotating the stretching / shrinking means, and the film has any orientation angle. Can be manufactured.

  With respect to stretching or contraction, by holding the four sides of the sheet-like film, the film can be stably held and expanded or contracted without generating local tension or pressure. Moreover, since the internal environment is controlled independently in the plurality of drying chambers, when a plurality of drying conditions are required, the conditions can be quickly switched, and the manufacturing efficiency is improved and the manufacturing is possible. Even when the operation is stopped, the time required to resume the operation can be shortened. And since the expansion / contraction means can move between a plurality of drying chambers, the expansion / contraction can be performed under appropriate drying conditions suitable for expansion / contraction, and efficiency can be improved. Furthermore, in the present invention, as shown in the above-described embodiment, since the enlargement / reduction can be performed even during the movement between the drying chambers, the manufacturing efficiency can be further improved, and the programming is performed in advance. Since a series of processes are controlled by the computer, the reproducibility of the conditions can be made extremely high.

  In addition, the present invention is a case where it is desired to manufacture a small amount of a sheet in the case where it is necessary to provide a vapor-deposited film, a coating film, etc. to the dried or enlarged film as shown in the second embodiment. In addition, by connecting only the sheets that require these processes to a predetermined drying chamber, the sheets can be selectively used for the processes among the sheet-like films to be manufactured. Thereby, various kinds of sheets having various functions can be manufactured.

  According to the present invention, a wide variety of scaled films can be produced from the already dried film.

  Furthermore, in this invention, size reduction as a film drying stretcher and a film manufacturing equipment can be achieved by providing a cutting means inside the drying chamber. For example, in the first embodiment, the occupied area as the solution casting apparatus is approximately 3 m × 3 m.

  As described above, by using the stretching machine of the present invention, the film production equipment can be made smaller than conventional equipment, and a small amount of various types of sheet-like films can be produced stably and efficiently with a small number of people, and the loss of raw materials can be reduced. Can be reduced.

It is the schematic which shows the solution film forming equipment using the extending | stretching machine of this invention. It is sectional drawing which shows a drying drawing machine. It is sectional drawing along the film conveyance direction inside a 1st dryer. It is sectional drawing along the AA line inside the 1st dryer of FIG. It is explanatory drawing which shows the movement of a movement expansion / contraction apparatus, and the film expansion / contraction method. It is a top view which shows the arrangement state of the pin of a movement expansion / contraction apparatus. It is a side view of the integrated clip used with the drying drawing machine of this invention. It is a front view which shows a separation type clip. It is a side view which shows a separation-type clip, (A) has shown the separation state, (B) has shown the film clamping state. It is a schematic front view which shows other embodiment which can change the expansion / contraction direction of a film. It is the same top view. It is the same top view of the state which changed the expansion / contraction direction. It is the schematic of the film manufacturing equipment which shows another embodiment. It is sectional drawing along the BB line of the film manufacturing equipment of FIG. It is a side view including the partial cross section of the unit continuous type solution film-forming equipment which is another embodiment of this invention. FIG. 16 is a plan view of the unit continuous solution casting apparatus of FIG. 15. It is a side view of the conventional continuous solution casting apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Solution film forming equipment 12 Drying and stretching machine 16 Film 21-23 First to third drying chambers 25-27 First to third drying chamber bodies 51 Cutting blade 52 Moving expansion / contraction part 53 Moving mechanism 53a Moving shaft 53b Female screw 56 Moving Base 65, 66 Drying nozzle 69 Recovery device 57 First pin 58 First pin base 61 Lifting mechanism 62 Pusher 71 Second pin 72 Second pin base 77 Moving mechanism 77a Spline shaft 77b Ball spline 77c Wall gear 78 Rail 84 Moving mechanism DESCRIPTION OF SYMBOLS 91 Pusher 92 Rail 93 Slide member 101 Film manufacturing equipment 102 Moving expansion / contraction frame 103 Supply apparatus 115 Film 121 Frame moving part 130 Unit continuous solution film-forming equipment 132 Drying chamber 134a, 134b Cutting blade 146 Fixed expansion / contraction machine

Claims (5)

Cutting means for cutting the film from a long shape into a sheet, and
A first stretching section that holds the sheet-like film by a plurality of holding members that are separated in a direction perpendicular to the stretching direction and that are displaceable in a direction perpendicular to the stretching direction, and that stretches the sheet-like film in a first direction; and An expansion / contraction device comprising a second extending portion extending in a second direction orthogonal to the first direction;
  A drying chamber which is provided so as to cover the expansion / contraction device, and the internal temperature can be controlled;
  A turntable that rotatably holds the expansion / contraction device in a plane including a first direction and a second direction,
  A film stretching machine characterized in that, after the expansion / contraction device is rotated by a predetermined angle by the turntable, the sheet-shaped film cut by the cutting means is held and stretched in the first and second directions. 2. The film stretching machine according to claim 1, wherein a plurality of the drying chambers are provided, and the plurality of drying chambers have an automatic door whose opening / closing is controlled by a door opening / closing mechanism at a doorway of the film. A movable table provided so as to be movable between the plurality of drying chambers, to which the first extending portion and the second extending portion are attached, and first to third disposed through the plurality of drying chambers. A shift shaft, a motor disposed outside the plurality of drying chambers, a motor for rotating the first shift shaft to move the movable table between the plurality of drying chambers, and a motor disposed outside the plurality of drying chambers. A motor that rotates the second shift shaft to drive the first extension unit, and is arranged outside the plurality of drying chambers, and rotates the third shift shaft to drive the second extension unit. The film stretching machine according to claim 2, further comprising a motor for performing the operation. 4. The film stretching machine according to claim 2 , wherein the cutting means is provided inside at least one of the drying chambers. The film stretching machine according to any one of claims 1 to 4 , further comprising a liquid contact means for previously containing a solvent or water in the film before drying.

Images