JP2008238578A - Method and apparatus for intermittent film formation on surface of long film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for intermittent film formation based on pressing a die having an irregular structure toward the surface of the film. <P>SOLUTION: The intermittent film forming method comprises the steps of pressing a film toward a die having fine irregularities in the surface to form fine irregularities in the film, releasing the film from the surface of the die by moving a release roll and an auxiliary roll, both in a rotating state and with the film rolled around the rolls, from the downstream to the upstream side of the conveyance of the film, in the vicinity of the surface of the die and almost in parallel with the surface of the die, stopping the rotation of the rolls while retaining the relative distance between the rolls, rolling the film around the rolls, moving the rolls from the upstream to the downstream side of the conveyance of the film, in the vicinity of the surface of the die and almost in parallel with the surface of the die, while supplying a fresh film to the vicinity of the surface of the die and forming next fine irregularities. The series of the film formation, the release treatment and the supply of a fresh film is repeated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention uses a mold having a fine uneven surface on the surface, presses the mold against the surface of a long film drawn from a roll-shaped film roll, and the surface of the long film The present invention relates to an intermittent film forming method and a forming apparatus for intermittently press-molding a fine concavo-convex shape of a certain area corresponding to a mold.

  In the method of the present invention, a fine concavo-convex shape corresponding to the mold area is formed using a mold on the surface of a continuous long film, and then the long film is removed from the mold. The downstream side, bring the new surface to be processed (unprocessed) to the position corresponding to the mold, perform the next uneven shape molding process, and remove the long film from the mold. Then, the film surface is processed intermittently by repeating the process of conveying downstream.

  The method and apparatus according to the present invention is suitable for such molding, particularly when the film after press molding is well released from the mold and the film surface to be pressed next is supplied close to the mold surface. Interval between molding surfaces adjacent to each other in the film conveying direction of the molding surface (the length of the non-molded part, and the distance between the rear end position of the molding surface by the previous treatment and the front end position of the molding surface by the next treatment. The present invention relates to an intermittent film forming method and a forming apparatus for a long film surface that can be controlled narrowly.

  As a means for producing an optical film such as a light guide plate, a light diffusing plate, and a lens, a method of transferring a fine uneven pattern on the surface of the film has been conventionally known.For example, for a roll-like long film, An apparatus and a method for intermittently forming fine concavo-convex patterns have been proposed (Patent Document 1, Patent Document 2).

  In these apparatuses and methods, the film drawn and supplied from the unwinding roll into the press apparatus is press-transferred to a mold with a fine uneven pattern, thereby forming an uneven pattern on the film surface intermittently (batch type). It will be.

  When press transfer is performed, the mold is heated to a temperature equal to or higher than the glass transition point of the film, and after the transfer is completed, the mold is cooled under a certain condition while continuing the press. When the cooling proceeds to below the glass transition point of the film, generally, the formed film can be released from the mold only by releasing the pressing pressure and applying a certain tension to the film.

  However, in such a mold release method, there may be a problem that the film cannot be peeled off while being attached to the mold due to the characteristics of the resin used and the consumption of the mold release material on the mold surface. Furthermore, if it is forcibly peeled off, the mold surface may be damaged, or a mold release mark such as a scratch may be left on the film transfer surface.

  There are various other methods for releasing the film. For example, as a method of handling a film wound in a continuous roll shape, the present inventors have proposed a method of releasing a film while holding it on a roll. Proposed (Japanese Patent Application No. 2006-262874).

However, this method has the following problems. That is, as the release operation in this method, the release roll moves from the standby position to the release start point that is the end point of the mold, and the release roll performs release while holding the film while rotating, After the film release, the same distance as the distance moved at the time of release is returned while keeping the peeling roll not rotating to supply the film. At this time, the distance between the peeling roll standby position and the end of the mold is the distance between the molding surfaces of the film, which is a loss that cannot be handled as a product. Reducing the width of the processing part leads to an improvement in the yield of the raw material and contributes to cost reduction. From this point, in such a mold release system, it can be said that it is ideal that the mold end and the separation roll standby position are the same, but in reality, the mounting part and the temperature control plate at the mold end Due to interference with the utility connection wiring, piping, or press structure, it is practically difficult to make the mold end and the peeling roll standby position the same, and it is necessary to take a certain distance. It was a situation in which the interval between the molding surfaces (the width of the non-processed portion existing between the processed frames (the length in the film length direction)) could not be reduced.
JP 2005-199455 A Japanese Patent Laying-Open No. 2005-310286

  In view of the above-mentioned points, the present invention reduces the distance between the molding surfaces in a system in which the film is released while being held on a roll when the film is released from the surface of the mold, and the film is supplied. An object of the present invention is to provide an intermittent film forming method and a forming apparatus for a long film surface capable of reducing the loss portion and improving the yield.

The intermittent film forming method for the long film surface of the present invention that achieves the above-described object has the following configuration (1).
(1) At least one of a peeling roll and an auxiliary roll disposed substantially parallel to the peeling roll after pressing the film against a mold having fine irregularities formed on the surface and completing the molding of the fine irregularities on the film surface The two rolls are moved in the vicinity of the mold surface and substantially parallel to the mold surface and from the downstream side of the film conveyance to the upstream side while the rolls are rotated and the film is held by the two rolls. The film is released from the surface of the mold, and then the film is held on both rolls while maintaining the relative positional relationship between the rolls and stopping the rotation of the rolls. In this state, by moving the both rolls in the vicinity of the mold surface in parallel with the surface from the upstream side to the downstream side of the film conveyance, a new work film surface is supplied in the vicinity of the mold surface, After that, it is configured to perform the next fine unevenness molding, and to the long film surface configured to repeatedly perform the above-described series of molding processing, mold release processing, and supply of a new processed film surface. In the intermittent film forming method, when performing the step of supplying the new film surface to be processed, before or after the supply step or during the step, the rear end position of the processed surface after the forming, An intermittent film forming method for a long film surface, characterized by performing a film position shifting process for narrowing a distance between front end positions of a new work forming surface.

  In the configuration of (1) above, the rear end position of the processing surface where the formation of the fine uneven shape is completed is the most upstream end position in the conveying direction of the forming processing surface, and a new processing target processing surface. The front end position is the most downstream end position in the transport direction of the processing surface on the film on which the fine shape is to be formed next.

  In the intermittent film forming method for the surface of the long film of the present invention, more specifically, preferably, it comprises any one of the following constitutions (2) to (10).

(2) The film position shifting process is performed in a state where the relative positional relationship between the two rolls is maintained and at least one of the two rolls is rotated counterclockwise from that during the mold release process. Under the condition of being held in a roll, both the rolls are moved by a predetermined distance from the upstream side to the downstream side of the film conveyance in the vicinity of the mold surface and substantially parallel to the mold surface. The intermittent film forming method for a long film surface as described in (1) above, wherein

(3) The step of moving the two rolls while rotating at least one of the two rolls in the direction opposite to that at the time of mold release, using the rotation driving means of the peeling roll or the auxiliary roll. (2) The intermittent film-forming method with respect to the long film surface as described.

(4) The step of moving the two rolls while rotating at least one of the two rolls in the direction opposite to that at the time of mold release is applied to the film by tension applying means provided on the upstream side or the downstream side of the mold. The intermittent film is applied to the surface of the long film according to the above (2), characterized in that the two rolls are rotated freely, and the two rolls are moved linearly to the downstream side of the film conveyance. Molding method.

(5) detecting the position of the two rolls in the step of moving the two rolls in the step of moving the two rolls while rotating at least one of the two rolls in the opposite direction to that at the time of mold release, or the The intermittent film forming for the long film surface according to any one of the above (2) to (4), wherein the film is obtained and controlled by calculating from the detected value of the number of rotations of at least one of the two rolls. Method.

(6) The said (1) description characterized by performing the said film position shift process by returning this film for a predetermined length toward the film conveyance upstream, with the position of both said rolls fixed. An intermittent film forming method for the long film surface.

(7) The step of returning the film toward the upstream side of the conveyance by a predetermined length is performed by a conveyance driving means provided on the upstream side of the mold, with respect to the long film surface according to (6) above Intermittent film forming method.

(8) The step of returning the film toward the upstream side of the transport by a predetermined length is performed using transport driving means provided on the upstream side of the mold, and the peeling roll or the auxiliary roll is in a direction opposite to that at the time of mold release. The intermittent film forming method for a long film surface according to the above (6), wherein the method is carried out by rotationally driving the film.

(9) The return length of the film in the step of returning the film by a predetermined length toward the upstream side of conveyance is obtained by detecting and calculating the rotational speed of at least one of the two rolls. The intermittent film forming method for the long film surface according to any one of (6) to (8) above.

(10) A lifting / lowering means for the mold, or a lifting / lowering means for the film on the upstream side of conveyance of the mold, and during the operation of supplying the new film surface to be processed, the lifting / lowering means causes the film to move to the mold. The intermittent film forming method for a long film surface according to any one of the above (1) to (9), wherein the film is retracted and supplied in a direction away from the film.
Moreover, the intermittent film formation apparatus with respect to the elongate film surface of this invention which achieves the objective mentioned above has the structure of the following (11).

(11) At least one of a peeling roll and an auxiliary roll arranged substantially parallel to the peeling roll after pressing the film against a mold having fine irregularities formed on the surface and completing the molding of the fine irregularities on the film surface The two rolls are moved in the vicinity of the mold surface and substantially parallel to the mold surface and from the downstream side of the film conveyance to the upstream side while the rolls are rotated and the film is held by the two rolls. The film is released from the surface of the mold, and then the film is held on both rolls while maintaining the relative positional relationship between the rolls and stopping the rotation of the rolls. In this state, a new work film surface is supplied near the mold surface by moving the two rolls from the upstream side to the downstream side of the film transport, in parallel with the surface near the mold surface. Thereafter, the surface of the long film is configured to perform the next fine uneven forming, and is configured to repeatedly perform the above-described forming process, mold release process, and supply of a new processed film surface. An intermittent film forming apparatus, wherein a rear end position of the processed surface after the molding is formed before, during or after the step of supplying the new processed film surface, and a new processed molding process An intermittent film forming apparatus for a long film surface having a mechanism for performing a film position shifting process for narrowing a distance between front end positions of a surface.

  In the intermittent film forming apparatus for the surface of the long film of the present invention, more specifically preferably, the apparatus has any one of the following constitutions (12) to (16).

(12) The length described in (11) above, wherein as the mechanism for performing the film position shifting process, there is provided a rotation driving means for rotating at least one of the two rolls in the reverse direction to that during the mold release process. An intermittent film forming device for the surface of a long film.

(13) As a mechanism for performing the film position shifting process, a tension applying unit for the film is provided on the upstream side or the downstream side of the mold, and a unit for moving the both rolls linearly to the downstream side of the film conveyance is further provided. The intermittent film forming apparatus for a long film surface as described in (11) above.

(14) The above (12) or characterized in that there is provided means for detecting the position of the both rolls in the conveying direction, or means for detecting the rotational speed of at least one of the two rolls and calculating the movement distance. (13) The intermittent film-forming apparatus with respect to the long film surface of description.

(15) The mechanism according to (11) above, wherein as a mechanism for performing the film position shifting process, means for returning the film by a predetermined length to the upstream side in the transport direction is provided on the upstream side of the mold. Intermittent film forming device for long film surface.

(16) An intermittent method for the long film surface according to any one of (15) above, wherein means for detecting the number of rotations of at least one of the two rolls and calculating the return length of the film is provided. Film forming equipment.

(17) The long film surface according to any one of (11) to (16) above, wherein a lifting / lowering means for the mold or a lifting / lowering means for the film is provided on the upstream side in the conveyance direction of the mold. Intermittent film forming equipment.

  By using the intermittent film forming method and the forming apparatus for the long film of the present invention, a film having fine irregularities formed on the surface by pressing with a mold can be obtained in a short time without impairing the film appearance. The film to be transferred next is released from the mold, and the distance between the molding surfaces (the width of the non-processed portion existing between the processed frames (the length in the film length direction)) is reduced. By supplying quickly, a high quality molded film can be formed with high productivity with little loss of raw materials.

  In the intermittent film forming method for the long film surface of the present invention, the film is pressed against a mold having fine irregularities formed on the surface, and after forming the fine irregularities on the film surface, the peeling roll and the peeling roll While rotating at least one of the auxiliary rolls arranged substantially parallel to the two rolls, the two rolls are substantially parallel to the mold surface in the vicinity of the mold surface in a state where the films are held on both rolls. In addition, the film is released from the mold surface by moving the film from the downstream side to the upstream side, and then the relative positional relationship between the rolls is maintained and the rotation of the rolls is stopped. In a state where the film is embraced by the two rolls, the two rolls are moved from the upstream side of the film conveyance to the downstream side in the vicinity of the mold surface and substantially parallel to the surface. Supply a new processed film surface in the vicinity of the mold surface, and then perform the next fine concavo-convex molding, and the above-described forming process, mold release process and new processed film surface An intermittent film forming method for a long film surface configured to repeatedly perform a series of processes of supply, and when performing the process of supplying the new processed film surface, before or after the supply process or During the process, a film position shifting process is performed to narrow the distance between the rear end position of the processed surface after the molding and the front end position of a new processed surface to be processed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a schematic cross-sectional view of the intermittent film forming apparatus of the present invention viewed from the film width direction, and FIGS. 2 and 3 show the release unit for releasing the film from the mold in the film running direction (winding side). The schematic cross-sectional view seen from is shown.

  Moreover, the schematic sectional drawing explaining the motion of the mold release unit seen from the film width direction in a prior art is shown to (a)-(e) of FIG. 4, and each (a)-(f) of FIGS. The schematic sectional drawing of the motion of the mold release unit seen from the film width direction in this invention is shown.

  As shown in FIG. 1, the intermittent film forming apparatus 1 of the present invention includes a press unit 10, a release unit 20, a heater unit 30, a cooling unit 40, an unwinding unit 50, and a winding unit 60. Composed. The film 2 wound up in a roll shape by the unwinding unit 50 is unwound and pressed by the press unit 10 against the surface 3a on which the fine concavo-convex shape of the mold 3 is processed, and is finely applied to the molding surface 2a of the film. The concavo-convex shape is transferred and formed and rolled up by the winding unit 60. The unwinding unit 50 and the winding unit 60 are the film transport devices.

  First, the release unit 20 which is the main part of the present invention will be described. As shown in FIG. 2, the release unit is composed of a peeling roll 21 and an auxiliary roll 22, and a peeling roll rotating means 23a is connected to the peeling roll 21, and the rotation is controlled at a specified rotational speed. The peeling roll rotating means 23a may be anything that can control the number of rotations, but a servo motor is more preferable so that the amount of rotation can be strictly controlled.

  In addition, the peeling roll 21 is connected to the peeling roll linear motion guide 25 via a bracket 26 so that the peeling roll 21 can smoothly move substantially parallel to the surface of the mold 3 while rotating. The peeling roll linear motion guide 25 is attached to the upper surface of the pressure plate (lower) 14b.

  On the other hand, the auxiliary roll turning means 24 is connected so that the auxiliary roll 22 can turn along the outer surface of the peeling roll 21 at the standby position 22p shown in FIGS. The auxiliary roll turning means may be any means that can raise and lower the auxiliary roll along the outer periphery of the peeling roll, such as an electromagnetic motor or an actuator using pneumatic pressure. The both ends of the auxiliary roll are attached so as to freely rotate around the roll axis. FIG. 2 shows a state in which the auxiliary roll turning means 24 is swung to the upper side of the peeling roll 21.

  FIG. 3 shows a schematic view when the release unit is operated by the linear drive means, and the release roll linear motion motor 23b and the ball screw 28 are connected to the release unit. As this linear motion means, a linear motor, an electromagnetic cylinder, a pneumatic cylinder or the like is preferably used. The configuration of the mold release unit may be based on the rotational drive means shown in FIG. 2, may be based on the linear motion drive means shown in FIG. 3, or may be a combination thereof.

  Actually, the film is released from the mold surface, and the supply operation of the film to be formed next will be described with reference to the prior art of FIG. 4 and the present invention of FIGS. In these drawings, the film forming surface 2a is indicated by a broken line. Before the mold release operation, the mold release unit stands by at the standby position 22p shown in FIG. This standby position 22p is located at a position avoiding electrical wiring from the end of the mold, which is the mold release start position, to the mold fixing means 80, the temperature control plate, the medium pipe 81, and the like. When starting the mold release operation, the auxiliary roll turning means is driven as shown in FIG. 4 (b) to move the auxiliary roll 22 to substantially above the peeling roll 21. Thereafter, as shown in FIG. 4C, the peeling roll is rotated by the peeling roll rotating means 23a. As the peeling roll rotates, it moves straight along the surface of the mold 3 to the film unwinding side, and at the same time, the film attached to the mold is released while being held by the peeling roll. When the release of the film is completed in the entire region of the mold as shown in FIG. 4D, the conveyance drive roll on the downstream side is rotated and the film is pulled while applying a brake so that the peeling roll does not rotate. . Then, as shown in FIG.4 (e), the unit of a peeling roll and an auxiliary | assistant roll moves straight to the film winding side in the state where the film was hung on the peeling roll and the auxiliary roll. It moves along the peeling roll linear motion guide 25. When the peeling roll returns to the standby position, the auxiliary roll turning means turns the auxiliary roll substantially below the peeling roll to release the film. At this time, as described above, the release unit returns to the standby position that is separated from the release start position by the distance L, and this distance L is an interval with the next forming surface that is formed intermittently. In the prior art, the distance L from the next molding surface depends on the fixing means 80 of the mold, the electrical wiring to the temperature control plate, the medium pipe 81, the press structure, the sensor installation position, and the like. In order to shorten this distance without being influenced by structural factors of the apparatus, the relative position relationship between the film forming surface 2a and the peeling roll is more upstream in the transport direction than that at the end of mold release, that is, on the unwinding side. This is possible by moving the film back.

  An embodiment of the present invention is shown in FIG. 5A to 5D are the same as the operations shown in FIG. After the release, as shown in FIG. 5E, the peeling roll is rotated in the direction opposite to that at the time of releasing, and the released film is moved to the winding side so as to return to the mold. After moving a predetermined distance, while applying a brake so that the peeling roll does not rotate, the conveyance driving roll on the downstream side is rotated, the film is pulled, and the release unit is returned to the standby position.

  In the method of the present invention, when the step of supplying a new film surface to be processed is performed in this manner, the rear end position of the processed surface that has been molded before, after, or during the supply step, A film position shifting process is performed to narrow the distance between the front end positions of the new work forming surface. By performing this process, the upstream end of the film forming surface 2a returns to the unwinding side, and the distance (length (width) of the non-processed portion) L from the next forming surface is set to It can be reduced without being influenced by structural factors.

  That is, by adjusting the distance to rotate the peeling roll in the reverse direction (film position shifting process), it is possible to reduce the distance L from the next molding surface to 0, and the loss in the film transport direction can be freely controlled. Will be able to control. The interval L may be 0, or may be adjusted to a range of about 0 to 50 mm, more preferably about 0 to 10 mm in consideration of a cutting margin for a film cut in a subsequent process.

  In FIG. 5, after the completion of the mold release in (d), the reverse rotation is performed in (e), and then the film is pulled and fed in (f). The film may be pulled and fed only, and then the release unit may be returned to the standby position by reverse rotation. Further, the reverse rotation operation can be performed at any timing when the film is supplied.

  The operation of rotating the peeling roll in the reverse direction may be performed by means for directly driving the peeling roll in the reverse direction. Although not shown, the means for applying tension to the film provided upstream or downstream of the mold 3 is used. The release roll may be freely rotated in a state where tension is applied to the film, and the release roll and the auxiliary roll may be moved together by the direct drive means 23b of the release unit as shown in FIG. .

  FIG. 6 shows another aspect of the film position shifting process as a method for controlling the distance L to the next molding surface to be small, and is the method described in (6) above. The operation up to FIG. 6 (d) is the same as that shown in FIG. 5, and only the film 2 is moved upstream in the transport direction, that is, the unwinding side while the position of the release unit is fixed after the release is completed. It is something to return. Although the operation of returning the film is not shown in FIG. 6 (e), the film is tensioned while the unwinding roll rotating means of FIG. 1 is reversely rotated or the position of the release unit is fixed. However, it can be performed by rotating the peeling roll in the direction opposite to that at the time of mold release.

  The method shown in FIG. 5 is obtained by rotating the conveyance drive roll on the downstream side while applying a brake so that the peeling roll does not rotate after completion of the rewinding operation, pulling the film and returning the release unit to the standby position. Similarly to the above, it is possible to adjust the distance L to the next molding surface to be small. Furthermore, similarly, the operation of rewinding the film may be performed after the film is pulled and supplied, and may be performed at any timing.

  It is preferable that the distance for reversely moving the release unit as shown in FIG. 5 and the length (distance) for rewinding the film shown in FIG. 7 are as constant as possible. In the apparatus of the present invention, It is preferable that a means for detecting the distance and the length is provided. In order to detect distance and length, it can carry out by detecting the rotation speed of a peeling roll or an auxiliary roll, and converting into distance, or detecting the position of a roll. Here, as the rotation speed detection means 71, a servo motor or the like may be used as the rotation drive means to detect its own rotation speed, or a rotation encoder may be used to detect the rotation speed from the outside. The position detection means 70 in the conveyance direction of the mold release unit can detect a part of the mold release unit with a detection sensor or the like provided on the lower pressure plate. Any number of detection sensors can be provided at any position in the film transport direction. The sensor may be any type such as an optical type or an electromagnetic type.

  Further, FIG. 7 shows a more preferable embodiment in which the film is lifted and retracted in the direction away from the mold by the film lifting means 82 so that the mold and the film do not rub against each other when the film is supplied.

  The film raising / lowering means may be a structure capable of supporting the entire width of the film, or may be configured to support only the end portion. The support portion may be planar or rectangular, but preferably has a roll shape. The distance for separating the films is linked with the length and tension of the film, but is preferably in the range of about 10 to 100 mm. In addition, it does not have to be a film lifting means, it may be a mold lifting means, or both may be adopted. In short, relative to the direction in which the film is separated from the mold, Any mechanism that can be retracted may be used.

  In the present invention, the series of release operations and reverse rotation operations so far depend on the rotation speed of the peeling roll, and the peeling speed can be performed at substantially the same speed as the peripheral speed of the roll. Therefore, it is possible to strictly control the peeling operation, and it is possible to easily create smooth peeling conditions for all molding materials and conditions.

  The film contact portion of the peeling roll and the auxiliary roll is preferably made of a rubber material having a certain elasticity and adhesiveness. For example, the rubber hardness (JIS K6253) is 40 to 70, more preferably 50 to 60. The surface centerline average roughness (JIS B0601) is preferably in the range of 0.01 μm to 1.0 μm, more preferably in the range of 0.01 μm to 0.5 μm. Suitable materials include EPDM, silicone rubber, fluororubber and the like. In the case where the rubber hardness of each roll exceeds 70 or the center line average roughness is greater than 1 μm, the adhesion between the film and the roll is not sufficient, so the Slip occurs, resulting in a decrease in peeling force due to a decrease in film tension. On the other hand, when the rubber hardness is less than 40, since the rubber deformation during the releasing operation is large, the releasing operation tends to become unstable, which may cause a release mark on the film surface. ,Caution must be taken. In addition, a material having a center line average roughness of less than 0.01 μm is difficult and impractical in production.

  The appropriate tension applied to the film during the releasing operation is generally 1 to 100 N, more preferably 5 to 50 N, depending on the material of the film to be applied and the temperature at the time of releasing. Moreover, the surface material of each roll has a heat resistant temperature of 100 ° C. or higher, more preferably 130 ° C. or higher. This is because a high-temperature film is handled to prevent a release operation failure due to dimensional deterioration and strength deterioration over time.

  Further, when the film is released, the peeling roll and the mold surface may be in contact with each other. At this time, it is preferable to arrange an elastic member such as an air cylinder or a spring in the vicinity of both ends of the peeling roll in the film width direction so that the force with which the peeling roll presses the mold surface can be controlled.

  Furthermore, when the surface unevenness pattern of the mold is very fine or the like, and is easily damaged by contact with the peeling roll, the clearance H between the peeling roll and the mold surface shown in FIGS. 2 and 3 is 0.1 mm to 10 mm. More preferably, it is 0.1 mm-5 mm, More preferably, it is 0.1 mm-1.0 mm.

  When the clearance H is 10 mm or less, the peeling point of the film is located in the vicinity immediately below the peeling roll, and it is preferable because the peeling point moves continuously with the movement of the peeling roll. This is because, when the peeling point moves intermittently, there is a high possibility that a linear peeling trace appears in the width direction of the film at the stopped point. However, if it is less than 0.1 mm, the mold surface and the peeling roll may come into contact with each other, and the pattern shape of the mold may be damaged. Further, the parallelism between the peeling roll and the mold surface is preferably 0.5 mm or less, more preferably 0.1 mm or less. Here, the “parallelism” can be measured by a displacement sensor attached to both end faces in the film width direction with the mold surface as a reference plane. That is, the difference between both ends of the distance between the mold surface and the roll outer surface measured when the peeling roll is arranged directly above the displacement sensor is defined as parallelism.

  Moreover, it is preferable to add a cooling water circulation mechanism etc. to a peeling roll and an auxiliary | assistant roll, and to temperature-control each roll to fixed temperature. Since the temperature of the film is high immediately after release, it is preferable that the temperature of the peeling roll and auxiliary roll that are in contact immediately after the release is kept constant. It also has the effect of lowering the temperature of the film at the time of mold release and immediately after the mold release, and is also effective for stable conveyance and winding after press molding.

  Furthermore, it is preferable to add vibration means to the peeling roll. As the vibration means, one using an electromagnetic actuator, one using a linear actuator, or one using an ultrasonic vibrator may be used. Moreover, the mechanism which gives a vibration only to the outer surface of a peeling roll may be sufficient. It propagates to the peeling point through the peeling roll itself or the film wound by the vibration of the outer surface, contributing to smooth peeling of the film.

  In order to perform a stable peeling operation, it is important to create an appropriate frictional force for releasing between the peeling roll and the film. For that purpose, the contact length in the film running direction between the film and the peeling roll is important. It is preferable that the length can be set in the range of 30 mm to 300 mm.

  And in this invention, in order to make this contact condition, it is good to make the diameter of a peeling roll into the range of 50 mm-200 mm. If it is less than 50 mm, since the contact area between the peeling roll and the film is small, a sufficient frictional force is not generated on the contact surface, a sufficient peeling force cannot be produced, and the peeling roll may idle. Further, if it is less than 50 mm, the curvature along the shape of the film immediately after the release becomes too large, and the film may be deformed such as curling, which is not preferable. On the other hand, when it becomes larger than 200 mm, it is necessary to take a wide space for the peeling operation, but it is difficult to secure in the press apparatus in terms of actual design.

  The press unit 10 is connected to the press cylinder 12 so that the pressure plate (upper) 14a can be moved up and down using the support column 11 as a guide. The support column 11 is disposed so as to be sandwiched between the frame (upper) 16a and the frame (lower) 16b. A temperature control plate (upper) 15a is attached to the lower surface of the pressure plate (upper) 14a. On the other hand, a temperature control plate (lower) 15b is attached to the upper surface of the pressure plate (lower) 14b. A heating unit 30 and a cooling unit 40 are connected to each temperature control plate via piping, wiring, and the like. And the metal mold | die 3 is attached to the upper surface of the temperature control plate (lower) 15b, and heating and cooling control are carried out via the lower temperature control plate. In addition, the metal mold | die 3 may be attached to the lower surface of the temperature control plate (upper) 15a. The flatness on the film pressing surface side of each plate is preferably 10 μm or less, and more preferably 5 μm or less.

  The press cylinder is connected to a hydraulic pump (not shown) and an oil tank, and the pressure pump (upper) 14a is moved up and down and the pressure is controlled by the hydraulic pump. In this embodiment, a hydraulic press cylinder is applied, but any mechanism can be used as long as it can control the applied pressure.

  The pressure range is preferably controllable in the range of 0.1 MPa to 20 MPa, more preferably 1 MPa and in the range of 10 MPa.

  The pressurization speed of the press cylinder can be controlled in the range of 0.01 MPa / s to 1 MPa / s, more preferably in the range of 0.05 MPa / s to 0.5 MPa / s.

  The mold 3 used in the present invention will be described. The transfer surface of the mold has a fine concavo-convex pattern, and methods for forming the pattern on the mold include machining, laser processing, photolithography, and electron beam drawing. As the material of the mold, any material can be used as long as desired pressing strength, pattern processing accuracy, and film releasability can be obtained. For example, metallic materials including stainless steel, nickel, copper, etc., silicone, glass, Ceramics, resins, or those whose surfaces are coated with an organic film for improving releasability are preferably used.

  In addition, an elastic plate 17 having a heat-resistant temperature of 130 ° C. or more is installed between the temperature control plate (upper) 15a and the film 2 so that the film can be formed without unevenness even if the film has some thickness unevenness. Is preferred. As the elastic plate 17, for example, ethylene / propylene / diene rubber (EPDM) having a thickness of 0.3 mm to 1.0 mm, silicone rubber, fluorine rubber, or the like can be preferably used. The thing which gave is good. Here, the heat resistant temperature refers to a temperature at which the rate of change in tensile strength when left at that temperature for 24 hours exceeds 10%.

  Next, the heating unit 30 will be described. The heating unit 30 is preferably a temperature control plate (upper), (lower) 15a, 15b made of an aluminum alloy and controlled by an electric heater cast in the plate. Alternatively, the heating control may be performed by flowing a temperature-controlled heat medium into a copper or stainless steel pipe cast in the temperature control plate or a hole processed by machining. Furthermore, the apparatus structure which combined both may be sufficient.

As the heat medium to be used, Barrel Therm (Matsumura Oil Co., Ltd.), NeoSK-OIL (Soken Techniques Co., Ltd.) or the like may be used, and water heated to 100 ° C. or higher may be circulated. And it is preferable that the number of lay nozzles in the pipe is in the range of 1.0 × 10 ^{4 to} 12 × 10 ⁴ so that heat can be transferred efficiently.

  Moreover, when using a cast heater, a cartridge heater, etc., it is preferable that the temperature control plate can be divided and controlled.

  It is preferable that the temperature control plate falls within a temperature distribution within 10 ° C., more preferably within 5 ° C., in the range during temperature increase, temperature decrease, and constant temperature control.

  Alternatively, the heat medium piping line may be processed directly on the mold to directly control the temperature of the mold.

  Next, the cooling unit 40 will be described. The cooling unit performs cooling control by flowing a temperature-controlled refrigerant body into copper or stainless steel pipes cast into temperature control plates (upper) (lower) 15a and 15b, or holes machined.

As the refrigerant, water is optimal, but an ethylene glycol solution may be used. The temperature is preferably in the range of 10 ° C. to 50 ° C., and the number of lay nozzles in the pipe is preferably in the range of 1.0 × 10 ^{4 to} 12 × 10 ⁴ so that heat can be transferred efficiently.

  The unwinding unit 50 and the winding unit 60 will be described. The unwinding unit 50 includes an unwinding roll rotating means 51, transport rolls 52a to 52d, a drawing buffer unit 53, and a film fixing unit 54. The winding unit 60 includes a winding roll rotating means 61, conveying rolls 62 a to 62 d, a winding buffer unit 63, a conveying driving roll 64, and a film fixing unit 65.

  The drawing buffer unit 53 and the take-up buffer unit 63 are respectively composed of boxes 55 and 66 and suction / exhaust means 56 and 67 connected thereto. The suction / exhaust means 56, 67 may be any device that can suck and exhaust air, such as a vacuum pump. By exhausting the air in the box, a pressure difference is given between the front and back surfaces of the film inserted in the box. Apply a certain tension and loosen and hold the film in the box.

  The length of the film inserted into the box is appropriately the length of the film that is intermittently conveyed before and after the film is formed. Further, sensors 57a, 57b, 68a, 68b are mounted in the boxes 55, 66. The sensor may be any sensor that can detect the film at a predetermined position. When the film is released and conveyed by the release unit described above and the film is removed from the sensor detection position in the box, the upstream / downstream unwinding roll rotating means 51 or the winding roll rotating means 61 is driven. The film can be unwound or wound, and the film can always be loosened in place in the box.

  In addition, the film fixing portions 54 and 65 are preferably flat plates having suction holes formed on the surface, but may be a mechanism that sandwiches the film with a clip, or a combination thereof.

  The film fixing portions 54 and 65 are both operated when performing the pressing operation. And when releasing a film, it is preferable to operate the film fixing | fixed part 54, to fix a film, and to open the film fixing | fixed part 65. FIG. Moreover, when supplying a film, it is preferable to open | release both the film fixing | fixed parts 54 and 65. FIG.

  The conveyance driving roll 64 is connected to a rotation driving means such as a motor (not shown), and the nip roll 64a is close to the conveyance driving roll 64 when the film is conveyed, and the torque is controlled by the conveyance driving roll 64 while sandwiching the film. The film is transported under a constant tension.

  The film 2 applied to the present apparatus has a glass transition temperature Tg of preferably 40 to 180 ° C, more preferably 50 to 160 ° C, and most preferably 50 to 120 ° C.

  If the glass transition temperature Tg is below this range, the heat resistance of the molded product is lowered and the shape changes with time, which is not preferable. If the temperature exceeds this range, the molding temperature is high and the energy is inefficient, the volume fluctuation during heating / cooling of the film becomes large, and the film can bite into the mold and cannot be released. Even if it can be done, it is not preferable because the transfer accuracy of the pattern is lowered, or the pattern is partially lacked to cause a defect.

  Moreover, as preferable thickness (thickness, film thickness) of the film applied to this invention, it is the range of 0.01-3 mm, More preferably, it exists in the range of 0.01-1 mm. If the thickness is 0.01 mm or less, the thickness is not sufficient for forming, and if it is 3 mm or more, the film is generally difficult to convey due to the rigidity of the film.

  The sheet-like substrate applied to the present invention is typically a film mainly composed of a thermoplastic resin, and more specifically, polyethylene terephthalate, polyethylene-2, 6-naphthalate, polypropylene terephthalate, Polyester resins such as polybutylene terephthalate, polyolefin resins such as polyethylene, polystyrene, polypropylene, polyisobutylene, polybutene and polymethylpentene, polyamide resins, polyimide resins, polyether resins, polyesteramide resins, polyetheresters Resin, acrylic resin, polyurethane resin, polycarbonate resin, or polyvinyl chloride resin.

  Among these, there are various types of monomers to be copolymerized, and it is easy to adjust the physical properties of the materials, so that polyester resins, polyolefin resins, polyamide resins, acrylic resins or these are particularly preferable. It is preferable that it is mainly formed from a thermoplastic resin selected from the above mixture, and it is more preferable that the above-mentioned thermoplastic resin is composed of 50% by weight or more.

  Further, the film may be a film made of the above-mentioned resin alone or a laminate made of a plurality of resin layers.

  Various additives can be added to the film applied to the present invention at the time of polymerization or after polymerization. Examples of additives that can be added and blended include, for example, organic fine particles, inorganic fine particles, dispersants, dyes, fluorescent brighteners, antioxidants, weathering agents, antistatic agents, mold release agents, thickeners, Examples include plasticizers, pH adjusters, and salts. In particular, as a releasing agent, low surface tension carboxylic acids such as long chain carboxylic acids or long chain carboxylates and derivatives thereof, and low surface tension alcohols such as long chain alcohols and derivatives thereof, and modified silicone oils. It is preferable to add a small amount of a compound or the like during polymerization.

Next, a series of film forming operations by the intermittent film forming apparatus 1 is performed in the following process (A) to (K).
(A) After setting the mold 3 in the press unit 10 in advance, the film 2 is set in the unwinding unit 50, the unwinding part of the film 2 is pulled out, and the mold in the press unit is passed through the guide roll. It winds with the winding unit 60 along the surface, and further via the mold release unit 20.
(B) Next, the heating unit is operated to raise both the temperature control plate (upper) 15a and the temperature control plate (lower) 15b to the molding temperature.
(C) The press unit 10 is operated to lower the temperature control plate (upper) 15a and press the film 3 so as to sandwich the film between the surface of the mold 3 and the temperature control plate (upper). At this time, the film fixing portions 54 and 65 are operated to fix the film. Conditions such as temperature, press pressure, pressurization speed, and pressurization time depend on the material of the film, the transfer shape, particularly the aspect ratio of the unevenness. In general, the molding temperature is set to 100 to 180 ° C., the press pressure is set to 1 to 10 MPa, the molding time is set to 1 second to 60 seconds, and the pressurization speed is set in the range of 0.05 MPa / s to 1 MPa / s.
(D) After completing the press while heating, the cooling unit is operated to lower the temperature of the temperature control plate (upper) 15a and the temperature control plate (lower) 15b. In addition, it is preferable that pressurization is continued during cooling. The cooling temperature is set so that the temperature on the mold surface is sufficiently cooled to release the film. For example, the surface temperature of the mold 3 is preferably cooled to the glass transition point or less of the film.
(E) After the cooling is completed, the press pressure is released, and the temperature control plate (upper) 15a is raised to a position where a sufficient space can be secured for the release unit 20 to move horizontally in the press apparatus.
(F) After the temperature control plate (upper) 15a completes the rise, the film fixing portion 65 is opened, the auxiliary roll turning means is driven, and the auxiliary roll 22 is swung to the upper part of the peeling roll 21, The film 2 is held by the peeling roll 21 and the auxiliary roll 22 (see FIG. 5B).
(G) Thereafter, the peeling roll 21 is rotated in the direction of winding the film. The peeling roll 21 moves to the unwinding side with rotation by the frictional force with the film surface. The movement is performed while being guided by a linear motion guide of the peeling roll provided on the pressure plate of the press device. At this time, the film that is in close contact with the mold surface is favorably released.
(H) When peeling to the unwinding side end of the mold 3 is completed, the rotation of the peeling roll is stopped (see FIG. 5D).
(I) Thereafter, the peeling roll is rotated in the direction opposite to that at the time of mold release, and is operated so as to reduce the distance L from the next film forming surface (see FIG. 5E).

  The distance moved by reverse rotation is such that the distance L is in the range of about 0 to 50 mm, more preferably about 0 to 10 mm. Later, a brake is applied so that the peeling roll does not rotate, the film fixing portion 54 is opened, and the conveyance drive roll 64 is rotated, so that the peeling roll 21 and the auxiliary roll 22 are wound while maintaining the relative position. Move to the side. At this time, a new film is pulled out from the unwinding side, and the formed film is sent out to the winding side (see FIG. 5 (f)).

At this time, the film lifting / lowering means 82 may be used to pull out the film while retracting in a direction away from the mold so that the film and the mold do not rub against each other (see FIG. 7F).
(J) When the drawing of the film is finished, the film is fixed by the film fixing unit 54, and then the auxiliary roll is turned back to the original position, and the film is fixed by the film fixing unit 65. When a new film is supplied, the film that has been loosened in advance in the draw buffer unit 53 is drawn to the take-up side, but the take-up roll rotating means is operated to the position where the film is detected by the sensor 57b, and the roll is wound. A new film is supplied to the drawing buffer unit from the roll. On the other hand, when the film that has been molded is delivered, the film corresponding to the delivered length is temporarily held by the take-up buffer unit 63, and is newly accumulated until the film is not detected by the sensor 68a. The film corresponding to the length of the minute is wound by operating the winding roll rotating means.
(K) Heating of the temperature control plate (upper) (lower) is started at the same time as or after the release of the film is completed. Then, the press unit 10 is operated to lower the temperature control plate (upper) to the vicinity of the upper surface of the film.

  After the temperature rise is completed, press molding is performed, and the operation from (C) described above is repeated.

  By the operations (F) to (H) described above, a smooth release operation can be incorporated into the intermittent film forming cycle, and a high-quality formed film with few release marks can be produced.

  Moreover, since the distance from the film to be formed in the next cycle can be controlled to be small by the operation (I), it is possible to reduce the loss of the film raw material.

Example 1
A mold having a size of 500 mm (film width direction) × 800 mm (film running direction) was attached to a press apparatus, and the film was formed intermittently. The material of the mold is copper and the thickness is 20 mm. The fine shape has a pitch of 50 μm, a convex portion width of 25 μm, a convex portion height of 50 μm, and a rectangular cross section when viewed from the film running direction.

  The press device can pressurize up to 3000 kN, and pressurization is performed by a hydraulic pump. Two temperature control plates made of an aluminum alloy and having a size of 700 mm (film width direction) × 1000 mm (film running direction) are attached in the upper and lower sides in the press device, and are connected to a heating device and a cooling device, respectively. The mold is attached to the lower temperature control plate. The heating device is a heat medium circulating device, and the heat medium is Barrel Therm # 400 (manufactured by Matsumura Oil Co., Ltd.), which is heated to 150 ° C. and flows at 100 liters / minute. Further, the cooling device is a cooling water circulation device, and flows water cooled to 20 ° C. at 150 liters / minute.

  And a mold release apparatus is the same structure as what is shown in FIG. 2, and combines a peeling roll and an auxiliary | assistant roll. Sequencer (MELSEC-Q series manufactured by Mitsubishi Electric Corp.) as a control device, positioning unit (QD75M4 manufactured by Mitsubishi Electric Corp.) as a controller for peeling roll drive control, AC servo amplifier (Mitsubishi Electric (Mitsubishi Electric Corp.) MR-J2S manufactured by Co., Ltd.) and a servo motor (HC-KFS manufactured by Mitsubishi Electric Co., Ltd.) were used. The peeling roll is covered with silicone rubber having an outer diameter of 150 mm, a surface having a rubber hardness of 60 (JIS K6253), and a surface centerline average roughness of 0.5 μm (JIS B0601). The auxiliary roll is covered with silicone rubber having an outer diameter of 50 mm, a surface having a rubber hardness of 60 (JIS K6253), and a surface centerline average roughness of 0.5 μm (JIS B0601). Further, the distance (clearance) between the peeling roll and the mold surface was 15 mm.

  The film used is made of polyethylene terephthalate, and has a thickness of 100 μm (thickness variation: ± 10 μm) and a width of 520 mm. The film is fed out and wound up by an unwinding / winding device installed opposite to the pressing device. In this apparatus, the distance between the standby position of the mold release apparatus and the end of the mold was 250 mm.

  Using the above apparatus, molding was performed intermittently as follows. In advance, the film is passed from the unwinding device to the winding device via a press device. Next, after the temperature control plate is heated to 110 ° C. both in the upper and lower directions, the upper plate is lowered and the film pressing is started. The press was performed at 5 MPa on the mold surface for 30 seconds. Thereafter, the temperature control plate is cooled both top and bottom while the press is continued. Cooling is stopped when each temperature control plate reaches 60 ° C. When the cooling is completed for both the upper and lower sides, the press is released. Raise the upper plate to the upper limit and drive the release device.

  The auxiliary roll is moved to the upper side of the peeling roll to wind the film, and then the peeling roll is rotated so that the peripheral speed is 10 m / min. With the rotation of the peeling roll, the film is released from the mold while the peeling roll moves to the unwinding side. After all the film has been released from the mold, the release roll is rotated in the reverse direction, moved 200 mm downstream in the conveyance direction, and then tensioned on the film by the conveyance drive roll on the winding device side while braking in the rotation direction of the separation roll. Is added and moved to the end of the press device winding side so as to be drawn to the downstream side together with the release unit, and the film surface to be molded next is set on the mold surface. Thereafter, the auxiliary roll turns and returns to the original position.

  The above operation was repeated to produce 10 molded films. As a result of measuring the distance between the molding surfaces of the film, the film could be molded at an interval of 50 mm.

  Further, as a result of visual evaluation of the molding surface, there was no scratch on the molding surface due to reverse rotation, molding defects or peeling marks were found at all, and an excellent molded film that was uniform over the entire surface was obtained. Further, the time from the start of the film release operation to the completion of the supply of a new film was 25 seconds.

Example 2
After the release of the film was completed, the release roll was rotated while the position of the release unit was fixed, and the film was rewound 245 mm upstream in the transport direction by rotating the unwinding device in the reverse direction. For other operations, 10 films were molded using the same apparatus and conditions as in Example 1 above. As a result of measuring the distance between the molding surfaces of the film, the film could be molded at an interval of 5 mm. Moreover, as a result of visual evaluation of the molding surface, scratches on the molding surface due to reverse rotation, molding defects, and peeling marks were not seen at all, and a uniform molded film was obtained on the entire surface. Also, the time from the start of the film release operation to the completion of the supply of a new film was 28 seconds.

Example 3
After the film is drawn out and supplied to a position 240 mm upstream from the release unit standby position, the peeling roll is reversely rotated and moved to the standby position. In addition, a film lifting / lowering means in which a roll having a diameter of 20 mm and a length of 600 mm was connected to an air cylinder was provided on the upstream side of the mold. For other operations, 10 films were molded using the same apparatus and conditions as in Example 1 above. As a result of measuring the distance between the molding surfaces of the film, the film could be molded at an interval of 10 mm. Moreover, as a result of visual evaluation of the molding surface, scratches on the molding surface due to reverse rotation, molding defects, and peeling marks were not seen at all, and a uniform molded film was obtained on the entire surface. Further, the time from the start of the film release operation to the completion of the supply of a new film was 25 seconds.

Comparative Example 1
Ten films were molded under the same apparatus and conditions as in Example 1 except that the release roll was supplied to the standby position without reversely moving the peeling roll after completion of mold release as in Example 1. As a result of measuring the distance between the molding surfaces of the film, the film was formed at an interval of 250 mm, and the distance from the standby position to the end of the mold appeared as it was.

It is the schematic sectional drawing which looked at the intermittent type film forming device of the present invention from the film width direction. In the intermittent film forming apparatus of this invention, it is the schematic sectional drawing which looked at the mold release unit provided with the rotation drive means from the film running direction (winding side). In the intermittent film formation apparatus concerning this invention, it is the schematic sectional drawing which looked at the mold release unit provided with the linear motion drive means from the film running direction (winding side). It is the schematic sectional drawing which looked at the mold release and supply operation | movement of the mold release unit in a prior art from the film width direction. In the intermittent film forming apparatus and method according to the present invention, it is a schematic sectional view of the release and supply operations of the release unit as seen from the film width direction. In the intermittent film forming apparatus and method according to the present invention, it is a schematic sectional view of the release and supply operations of the release unit as seen from the film width direction. In the intermittent film forming apparatus and method according to the present invention, it is a schematic sectional view of the release and supply operations of the release unit as seen from the film width direction.

Explanation of symbols

1: Intermittent film forming apparatus 2: Film 2a: Film forming surface 3: Mold 3a: Fine uneven surface 10: Press unit 11: Support column 12: Press cylinder 14a, b: Pressure plate (upper), (lower )
15a, b: temperature control plate (top), (bottom)
16a, b: Frame 17: Elastic plate 20: Release unit 21: Peeling roll 22: Auxiliary roll 22p: Standby position 23a: Peeling roll rotating means 23b: Peeling roll rotating motor 24: Auxiliary roll rotating means 25: Peeling roll straight Moving guide 26: Bracket 27: Release point 28: Ball screw 29: Nut 30: Heater unit 40: Cooling unit 50: Unwinding unit 51: Unwinding roll rotating means 52a to d: Guide roll 53: Pulling buffer part 54: Film Fixed portion 55: Box 56: Suction / exhaust means 57a, b: Sensor 60: Winding unit 61: Winding roll rotating means 62a-d: Guide roll 63: Winding buffer part 64: Transport drive roll 64a: Nip roll 65: Film Fixed portion 66: box 67: suction / exhaust means 68a, b: sensor 70: position Detection means 71: Rotational speed detection means 80: Mold fixing means 81: Temperature control plate electrical wiring, medium piping 82: Film lifting / lowering means H: Clearance L: Distance to next molding surface

Claims (17)

  After pressing the film against a mold having fine irregularities formed on the surface and completing the formation of fine irregularities on the film surface, at least one of a peeling roll and an auxiliary roll arranged substantially parallel to the peeling roll While rotating, the two rolls are moved in parallel with the mold surface in the vicinity of the mold surface and from the downstream side of the film conveyance to the upstream side while holding the film on the rolls. The film is released from the surface of the mold, and then the film is held in both rolls while maintaining the relative positional relationship between the rolls and stopping the rotation of the rolls. , By moving the two rolls from the upstream side to the downstream side of the film conveyance in the vicinity of the mold surface and in parallel with the surface, thereby supplying a new film surface near the mold surface. In addition, it is configured so as to perform the next fine unevenness molding, and is intermittent with respect to the long film surface configured so as to repeatedly perform a series of processes of forming, releasing, and supplying a new processed film surface. In the film forming method, when performing the step of supplying the new processed film surface, before or after the supplying step or during the step, a rear end position of the processed surface on which the forming has been completed, and a new surface An intermittent film forming method for a long film surface, characterized by performing a film position shifting process for narrowing a distance between front end positions of a work forming surface. In the film position shifting process, the film is held by the two rolls while maintaining the relative positional relationship between the two rolls and while rotating at least one of the two rolls in the opposite direction to that during the mold release process. Under these conditions, the two rolls are moved by a predetermined distance from the upstream side to the downstream side of the film conveyance in the vicinity of the mold surface and substantially parallel to the mold surface. The intermittent film forming method for a long film surface according to claim 1.   3. The step of moving the two rolls while rotating at least one of the two rolls in the direction opposite to that at the time of mold release is performed using a rotation driving means of the peeling roll or the auxiliary roll. An intermittent film forming method for the long film surface.   The step of moving the two rolls while rotating at least one of the two rolls in the opposite direction to that at the time of mold release is performed by applying tension to the film by tension applying means provided on the upstream side or downstream side of the mold. The intermittent film forming method for a long film surface according to claim 2, wherein the rolls are in a state in which both rolls can be freely rotated and the both rolls are moved linearly to the downstream side of the film conveyance.   In the step of moving the two rolls while rotating at least one of the two rolls in the direction opposite to that at the time of releasing, the distance of the two rolls is detected, or the positions of the two rolls are detected. 5. The intermittent film forming method for a long film surface according to claim 2, wherein the method is obtained and controlled by calculating from a detected value of the number of rotations of at least one roll.   2. The long film according to claim 1, wherein the film position shifting process is performed by returning the film toward the upstream side of film conveyance by a predetermined length while the positions of the two rolls are fixed. An intermittent film forming method for the surface.   7. The intermittent film forming for a long film surface according to claim 6, wherein the step of returning the film toward the upstream side by a predetermined length is performed by a transport driving means provided on the upstream side of the mold. Method.   The step of returning the film toward the upstream side of the transport by a predetermined length is performed by using a transport drive means provided on the upstream side of the mold, and further rotating the peeling roll or auxiliary roll in the direction opposite to that at the time of mold release. The intermittent film forming method for a long film surface according to claim 6, wherein the method is performed.   The return length of the film in the step of returning the film toward the conveyance upstream side by a predetermined length is obtained by detecting and calculating the number of rotations of at least one of the two rolls. Item 9. An intermittent film forming method for a long film surface according to any one of Items 6 to 8.   During the operation of supplying the new film surface, the film is separated from the mold by the lifting / lowering means provided in the mold lifting / lowering means or the film lifting / lowering means upstream in the conveyance direction of the mold. The intermittent film forming method for a long film surface according to any one of claims 1 to 9, wherein the film is retracted and supplied in the direction of the film.   After pressing the film against a mold having fine irregularities formed on the surface and completing the formation of fine irregularities on the film surface, at least one of a peeling roll and an auxiliary roll arranged substantially parallel to the peeling roll While rotating, the two rolls are moved in parallel with the mold surface in the vicinity of the mold surface and from the downstream side of the film conveyance to the upstream side while holding the film on the rolls. The film is released from the surface of the mold, and then the film is held in both rolls while maintaining the relative positional relationship between the rolls and stopping the rotation of the rolls. , By moving the two rolls from the upstream side to the downstream side of the film conveyance in the vicinity of the mold surface and in parallel with the surface, thereby supplying a new film surface near the mold surface. In addition, it is configured so as to perform the next fine uneven forming, and intermittently with respect to the long film surface configured so as to repeatedly perform a series of processes up to the above-described forming process, release process, and supply of a new processed film surface. A film forming apparatus comprising: a rear end position of a processed surface after completion of molding, and a new processed molding processing surface before, after or during the step of supplying the new processed film surface; An intermittent film forming apparatus for a long film surface, comprising a mechanism for performing a film position shifting process for narrowing a distance between front end positions.   The long film surface according to claim 11, wherein a rotation driving means for rotating at least one of the two rolls in a reverse direction to that during the mold release process is provided as a mechanism for performing the film position shifting process. Intermittent film forming equipment.   As a mechanism for performing the film position shifting process, a means for applying tension to the film is provided on the upstream side or the downstream side of the mold, and further, means for moving the both rolls linearly to the downstream side of the film conveyance is provided. An intermittent film forming apparatus for the long film surface according to claim 11.   14. The length according to claim 12, further comprising means for detecting a position of the both rolls in the conveying direction, or means for detecting a rotation number of at least one of the both rolls and calculating a moving distance. An intermittent film forming device for the surface of a long film.   12. The long film surface according to claim 11, wherein as a mechanism for performing the film position shifting process, means for returning the film by a predetermined length to the upstream side in the transport direction is provided on the upstream side of the mold. Intermittent film forming equipment.   16. The intermittent film forming apparatus for a long film surface according to claim 15, further comprising means for detecting a rotation speed of at least one of the two rolls and calculating a return length of the film.   The intermittent film forming with respect to the long film surface according to any one of claims 11 to 16, wherein a lifting / lowering means for the mold or a lifting / lowering means for the film is provided on the upstream side in the conveyance direction of the mold. apparatus.

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