CN102205635B - Film stretching device and method - Google Patents
Film stretching device and method Download PDFInfo
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- CN102205635B CN102205635B CN201110066303.XA CN201110066303A CN102205635B CN 102205635 B CN102205635 B CN 102205635B CN 201110066303 A CN201110066303 A CN 201110066303A CN 102205635 B CN102205635 B CN 102205635B
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Abstract
The invention provides a film stretching device and a method thereof. A stretching device (2) comprises clamps (5), and a first guide rail and a second guide rail (11,12) for guiding the clamps (5). Each guide rail (11,12) comprises a first straight line part (11a, 12a), a first bent part (11b,12b), an inclined part (11c,12c), a second bent part (11d, 12d) and a second straight line part (11e,12e). The clamps (5) are equipped on a first chain (13) with a pitch (P1) corresponding to the curving rate of the first bent part (11b) when the first straight line part (11a) moves and inclines towards the first bent part (11b). The clamp gap (L5) is thus made smaller within a range where adjacent clamps (5) are not in contact with each other. The first bent part (11b) has a 2-degree bent angle (theta) and a 700-millimeter bent radius. The clamps (5) each have a non-holding part with a 1.8-millimeter length (L1) and a holding part with a 62-millimeter length (L2). The gap (L3) between the supporting seats (30) is 1.8 mm long. The clamps have a length (L4) of 126mm. The gap (L5) between the clamps is 1.6 mm long. And the pitch (P1) is 127.6mm long.
Description
Technical field
The present invention relates to a kind of film stretching device and method of stretched film.
Background technology
In recent years, because of the development rapidly or universal of liquid crystal display etc., for the demand of the polymer film of the diaphragm etc. of these liquid crystal displays in increase.Especially the demand of Cellulose acylate film is in increase.Increase with this demand requires the raising of productivity ratio.Cellulose acylate film (hereinafter referred to as film) uses curtain coating mould cast dope on the supporter be continuously traveling, and after this casting films being peeled from supporter, manufactures by making it dry and being wound around.Can obtain in such solution film-forming method with foreign compared with the film-forming method melt extruded and the film of optical characteristics excellence.
As the method for optical characteristics especially adjusting deviation regulating film, carry out the method using the film stretching devices such as tenter frame apparatus to stretch.And propose there is following technology: in stenter, the clip of the edge, both sides of holding film is moved along the pair of guide rails of the bend having the line part that extends to the long side direction of film and bend to the width of film.Thus, film is stretched to width.In film after the stretch, the deviation of the neighbouring partial optical characteristic of grip portion is large and can not use as product.Therefore these side edge portions of membranectomy and become product.By reducing these resection to expand the part used as product, boost productivity.
Japanese Patent Publication 11-090943 publication discloses manufacture method and the clip of three cellulose acetate membrane in recording.In this Japanese Patent Publication 11-090943 publication, multiple clip is arranged respectively the T font support seat holding film, the mutual reverse arranging of multiple T font support seat.Thus, film film direction of transfer repeating scope is held.And, when the arbitrary film length on film direction of transfer is set to Lt, will in this film length Lt, when the film overall length of the part held by support seat is set to Ltt, 1.0≤(Ltt/Lt)≤1.99.Thus, film holds overall length Ltt and becomes more than film length Lt, does not hold the partial disappearance of film in film direction of transfer.Owing to not holding the partial disappearance of film in film direction of transfer, so the deviation of the optic axis (slow axis) on the long side direction of the film after stretching can be suppressed.By suppressing the deviation of optic axis, the resection near the grip portion in the film after abatement stretches.
And, in the blooming and manufacture method thereof of the record of Japanese Patent Publication 2006-256064 publication, detect the cyclical movement of the optics physical property of film long side direction, the cyclical movement using this to detect and desired value depart from the film transmission or the stretching that control next cycle.When detecting the phase difference of left and right clip, eliminating clip phase difference by independently controlling left and right clip speed, suppressing the deviation of the optics physical property produced by clip phase difference.
In Japanese Patent Publication 11-090943 publication, by suppressing the deviation of the optic axis on the long side direction of film, the resection near abatement grip portion.But, because hold film side edge part, so hold the partial variable-length of the film on width by multiple T font support seats of reverse arranging mutual on film width.Grip portion can not use as product, is necessary excision.Therefore, increase as the overall resection of film, produce rate variance.In addition, because the quantity of support seat becomes many, thus device become complicated while cost uprise, the cost of the film manufactured with this device itself also uprises.Further, in Japanese Patent Publication 2006-256064 publication, the deviation of the optics physical property of the film long side direction caused by the phase difference of left and right clip can be suppressed.But the deviation of optic axis cannot be suppressed.
Summary of the invention
The present invention completes to solve above-mentioned problem, its object is to provide a kind of the deviation of optic axis can be suppressed to boost productivity by simple structure film stretching device and method.
In order to realize above-mentioned target, film stretching device of the present invention possesses pair of guide rails and multiple clip.Pair of guide rails has line part and bend.Described line part extends to film direction of transfer.Described bend bends to the width of described film.Multiple clip holds the edge, both sides of described film.Move along described guide rail while described multiple clip holds described film, and to stretch described film to width.Described multiple clip arranges with the pitch corresponding to the rate of curving of described bend.Described multiple clip is arranged to described adjacent clip gap each other when moving described bend and diminishes in adjacent clip each other discontiguous scope.
Preferred described clip possesses framework and support seat.Described framework has the base of the side edge part carrying described film.Described support seat is rotatably installed on described framework, and the holding position and decontroling between the ejected position that holds holding described film between described base rotates.Described support seat has the non-handle part not holding described film and 2 handle parts holding described film.Described non-handle part is arranged at the approximate center of film direction of transfer.Described 2 handle parts are divided by described non-handle part.Preferred described support seat meets 1mm≤L1≤2.5mm and 50mm≤L2≤150mm.Wherein, L1 is the length of described non-handle part, and L2 is the length of 1 described handle part.
Preferred described support seat is made up of 2 independent clampers rotated.Described 2 clampers have described handle part respectively.Described 2 clampers are vacated gap and arrange on film direction of transfer.Described gap is described non-handle part.
In described support seat, described 2 handle parts can be integrally formed.Form recess in the approximate center of film direction of transfer, described recess can be described non-handle part.
When the described support seat gap each other of described adjacent clip is set to L3, preferably meet 1mm≤L3≤2.5mm.
When the length of described clip is set to L4, preferably meet 101mm≤L4≤302.5mm.
Film drawing process of the present invention possesses holding step and stretching step.Hold step holds film edge, both sides with multiple clip.Stretching step, by moving described multiple clip along pair of guide rails, to stretch described film to width.Described pair of guide rails has line part and bend.Described line part extends to the direction of transfer of described film.Described bend bends to the width of described film.Described multiple clip arranges with the pitch corresponding to the rate of curving of described bend.Described multiple clip is arranged to described adjacent clip gap each other when moving described bend and diminishes in adjacent clip each other discontiguous scope.
Invention effect:
In the present invention, multiple clip arranges with the pitch corresponding to the rate of curving of described bend, and during to make the bend of moving guide rail, described adjacent clip gap each other diminishes in adjacent clip each other discontiguous scope.Therefore, it is possible to reduce the part that namely clip gap does not each other hold film.Thereby, it is possible to suppress the deviation of optic axis, and boost productivity.
Further, the length of the non-handle part being arranged at the support seat of clip is set to L1, when the length of handle part is set to L2, if meet 1mm≤L1≤2.5mm, 50mm≤L2≤150mm, then can carries out stable film and hold and the part not holding film can be reduced.
Accompanying drawing explanation
Read the detailed description of preferred embodiment by referring to accompanying drawing, make those skilled in the art can easy understand above object and advantages.
Fig. 1 is the top view representing tenter frame apparatus.
Fig. 2 is the front view representing clip and clip opener.
Fig. 3 is the stereogram representing clip.
Fig. 4 is the stereogram representing clip.
Fig. 5 is the top view representing clip.
Fig. 6 is the stereogram representing clip and clip opener.
Fig. 7 is the front view representing clip and clip opener.
Fig. 8 is the concise and to the point figure of solution film-forming equipment.
Fig. 9 is the side view representing clip.
The table of the experimental result of the amplitude of fluctuation deviation of the optic axis after Figure 10 stretches when being material, non-handle part length, handle part length, the clip length representing change polymer film.
Figure 11 represents the side view being provided with the clip of recess at support seat central part.
Detailed description of the invention
As shown in Figure 1, tenter frame apparatus 2 holds polymer film 3 edge, both sides with clip 5 stretches to film width B while transmitting to film direction of transfer A.Tenter frame apparatus 2 is dry polymer film 3 while this stretching.
Tenter frame apparatus 2 possesses the 1st guide rail 11, the 2nd guide rail 12 and guides to the 1st, the 2nd chain (endless-chain) 13,14 of these guide rails 11,12.1st, the 2nd chain (endless-chain) 13,14 is provided with clip 5 with certain pitch.
Each guide rail 11,12 possesses the 1st line part 11a, 12a, the 1st bend 11b, 12b, rake 11c, 12c, the 2nd bend 11d, 12d and the 2nd line part 11e, 12e.1st line part 11a, 12a extends to film direction of transfer A.1st bend 11b, 12b bends to the lateral direction on film width B.Rake 11c, 12c extend with the inclination angle linearity bending by the 1st bend 11b, 12b.2nd bend 11d, 12d is bending to the direction, inner side on film width B.2nd line part 11e, 12e extends to film direction of transfer A.But the bending direction of the 1st bend 11b, 12b and the 2nd bend 11d, 12d is different bending with the identical rate of curving.
Tenter frame apparatus 2 is configured in not shown hothouse.Hothouse is divided into preheating zone 2a, drawing zone 2b and stretching relax zone 2c at film direction of transfer A.Become each guide rail 11,12 the 1st line part 11a, 12a scope preheating zone 2a in, such as less than 200 DEG C preheating polymer films 3 more than 80 DEG C.In the 2a of this preheating zone, the distance between a pair clip is unchanged, can not carry out in the stretching based on B on the film width of clip 5.
Become each guide rail 11,12 rake 11c, 12c scope drawing zone 2b in, such as less than 200 DEG C heated polymerizable thing films 3 more than 80 DEG C.In this drawing zone 2b, by clip 5 movable inclined portion 11c, 12c, the distance between a pair clip increases gradually, and polymer film 3 is stretched to film width B by clip 5.In the stretching relax zone 2c of scope becoming the 2nd line part 11e, 12e, the distance between a pair clip does not change, and carries out stretching and relaxes.In addition, stretching ratio can coordinate desired optical characteristics etc. suitably to change.
1st, the 2nd chain 13,14 is set up between drive sprocket 21,22 and driven sprocket 23,24.Between these sprocket wheels 21 ~ 24, the 1st chain 13 is guided by the 1st guide rail 11, and the 2nd chain 14 is guided by the 2nd guide rail 12.Drive sprocket 21,22 is arranged at tenter outlet 27 side, and they are by not shown driving mechanism rotary actuation.Driven sprocket 23,24 is arranged at stenter entrance 26 side.
As shown in Fig. 2 and Fig. 3, Fig. 4, clip 5 is made up of gripper body 28 and guide rails assembling portion 29.Gripper body 28 is made up of with the framework 33 being roughly コ word shape support seat 30.Support seat 30 is made up of the 1st clamper 31 and the 2nd clamper 32.Framework 33 possesses the base 33b rotatably supporting each installation shaft 33a of clamper 31,32 and the side edge part of carrier polymer film 3.
Each clamper 31,32 is formed by being installed on axle portion 31a, the 32a of framework 33, handle part 31b, 32b of holding polymer film 3 between base 33b and head 31c, 32c.Each clamper 31,32 is installed on framework 33, to make to form small gap between handle part 31b and handle part 32b on film direction of transfer.
The holding position (with reference to Fig. 3) that each clamper 31,32 is to hold polymer film 3 between base 33b rotates with decontroling between the ejected position (reference Fig. 2 and Fig. 4) that holds, usually becomes holding position by deadweight.Hold in the PA of starting position and hold polymer film 3 by base 33b and handle part 31b, 32b.
Guide rails assembling portion 29 is made up of installation frame 35 and guide roller 36,37,38.Installation frame 35 is provided with the 1st chain 13 or the 2nd chain 14.Guide roller 36 ~ 38 or contact with each supporting surface of drive sprocket 21,22, or contact with the supporting surface of the 1st guide rail 11 or the 2nd guide rail 12 and rotate.Thus, gripper body 28 can not come off from each sprocket wheel 21,22 or each guide rail 11,12, guides along each guide rail 11,12.
As shown in Figures 1 and 2, with the close clip opener 40 be configured with for decontroling clip 5 of each sprocket wheel 21 ~ 24.Contact with head 31c, 32c of clip 5 before holding starting position PA in the driven sprocket 23,24 of stenter entrance 26 and make clip opener 40 one-tenth relieving states.Thus, the side edge part of polymer film 3 can be collected.And departed from from head 31c, 32c by clip opener 40 during holding starting position PA, clip 5 is sheathed on holding position by deadweight from ejected position, and holds the side edge part of polymer film 3.Equally, in the holding ejected position PB of polymer film 3,5 one-tenth, clip ejected position is made by clip opener 40 in the drive sprocket 21,22 of tenter outlet 27.Thus, the holding of the side edge part of polymer film 3 is decontroled.
Start the stretching of polymer film 3 in tenter frame apparatus 2 at stretching starting position PC, stop the stretching of polymer film 3 at stretching final position PD.Not stretching polymer film 3 transmitting from the preheating zone 2a holding starting position PA to stretching starting position PC.In addition, at also not stretching polymer film 3 transmitting from stretching final position PD to the stretching relax zone 2c holding ejected position PB.
As shown in Figure 5, when clip 5 moves the 1st bend 11b of the 1st guide rail 11, when specifically moving from the 1st line part 11a to the 1st bend 11b, to the neighbouring inclination of neighboring clips 5 (clip 5 below in Fig. 5), clip 5 gap smaller each other.When this tilts, clip 5 is installed on the 1st chain 13 with the pitch P1 corresponding to the rate of curving of the 1st bend 11b, diminishes in clip 5 each other discontiguous scope to make clip gap L5.Similarly, clip 5 is installed on the 2nd chain 14 with the pitch corresponding to the rate of curving of the 1st bend 12b.And, because the 2nd bend 11d, 12d bends with the rate of curving identical with the 1st bend 11b, 12b, so tilt when clip 5 moves to the 2nd bend 11d, 12d from rake 11c, 12c, during neighboring clips 5 gap smaller each other, clip 5 also can not contact each other.In addition, clip 5 move (rotation) each sprocket wheel 21 ~ 24 time, neighboring clips 5 also can not contact each other.In addition, in Figure 5, the rate of curving of the 1st bend 11b is depicted as larger than reality.
As shown in FIG. 6 and 7, between holding starting position PA and stretching starting position PC, be provided with 2 clip closers 42 to the direction reinforcing of closing clip 5.This clip closer 42 contacts with head 31c, 32c of clip 5 and makes it afterburning to closing direction.Clip closer 42 makes to rotate counterclockwise along each clamper 31,32 of the clip 5 of guide rail 11 movement, and each clamper 31,32 along the clip 5 of guide rail 12 movement is rotated clockwise, and afterburning respectively to the direction closing clip 5.
Clip closer 42 forms tapered portion 42a, afterburning portion 42b successively from the upstream side of film direction of transfer A.Tapered portion 42a guiding head 31c, 32c.If by tapered portion 42a guiding head 31c, 32c to afterburning portion 42b, then the 1st, the 2nd clamper 31,32 rotates, and clip 5 is afterburning to closing direction.In addition, clip closer 42 preferably uses resin-made in order to the contact resistance of less suppression and head 31c, 32c.Nylon is used, Delrin (registration mark) etc. as resin.
Below the manufacture method of above-mentioned polymer film 3 is described.But the manufacture method below described and manufacturing installation are an example of the present invention, are not limited thereto.
As shown in Figure 8, solution film-forming equipment 50 has dope 51,52,2, curtain coating room tenter frame apparatus 2, hothouse 54, cooling chamber 55 and batches room 56.In present embodiment, in 2 tenter frame apparatus 2 by carry out at first film stretching (for left side in Fig. 8, i.e. upstream side) be called the 1st tenter frame apparatus 2, after carry out film stretching (in Fig. 8 for right side, i.e. downstream) be called the 2nd tenter frame apparatus 2.
Dope 51 is for the manufacture of the polymer film 3 as cellulose diacetate film, and this dope 51 delivers to curtain coating mould 60.
Curtain coating mould 60,2 rotating rollers 61, casting belt 62 around this 2 rotating rollers 61 movement, stripper roll 63 and pressure-reducing chamber 64 is provided with in curtain coating room 52.Rotating roller 61 is rotated by drive unit (not shown), directed through the casting belt 62 in rotary moving of this rotating roller 61, to spue dope 51, and form casting films 65 at casting belt 62 from curtain coating mould 60.
Curtain coating room 52 is set to the temperature of the easy cooling curing (gelation) of casting films 65 by register (not shown).And rotate during about 9/10 at casting belt 62, casting films 65 reaches the gel strength with self-supporting, stripper roll 63 peels off casting films 65 on casting belt 62 as moistening film 68.Further, in curtain coating room 52, the winding-up of casting films 65 dried wind is dry, and the remaining solvent amount leaving the moistening film 68 of curtain coating room 52 is about 30 quality %.
Pressure-reducing chamber 64 relatively curtain coating mould 60 is configured at roller travel direction upstream side, is held in negative pressure by pressure-reducing chamber 64.Thus, desired pressure is reduced pressure in the back side (face later contacted with the casting belt 62) side of curtain coating liquid pearl, reduces by rotating roller 61 high-speed rotary then the impact of carrying wind produced.
Transfering department 71, the 1st tenter frame apparatus 2 and the 2nd tenter frame apparatus 2 is provided with successively in the downstream of curtain coating room 52.The moistening film 68 peeled off by transfer roller 72 is directed into the 1st tenter frame apparatus 2 by transfering department 71.In the 1st tenter frame apparatus 2, moistening film 68 is dried to polymer film 3 while stretching.By the stretch processing under the predetermined condition in the 1st tenter frame apparatus 2, and the polymer film 3 leaving the 1st tenter frame apparatus 2 is endowed desired optical characteristics.Equally, in the 2nd tenter frame apparatus 2, polymer film 3 is dried while stretching, and the polymer film 3 leaving the 2nd tenter frame apparatus 2 is endowed desired optical characteristics.In addition, the hothouse of transmission limit, roller limit dry polymer film 3 can be arranged through between the 1st tenter frame apparatus 2 and the 2nd tenter frame apparatus 2.
1st, the downstream of tenter frame apparatus 2 of the 2nd is respectively equipped with trimming device 73.Trimming device 73 blocks the limit at film both ends.This block after limit delivered in disintegrating machine 74 by air-supply, recycled as raw materials such as dopes by pulverizing at this.
Hothouse 54 is provided with multiple roller 77.By to be wound at polymer film 3 on these rollers 77 and to be carried out drying by transmitting.Hothouse 54 is connected with absorbing recovery device 78, and the solvent of evaporation from polymer film 3 is reclaimed in absorption.
The outlet side of hothouse 54 is provided with cooling chamber 55.At this cooling chamber 55, polymer film 3 is cooled to room temperature.The downstream of cooling chamber 55 is provided with forces Destaticizing device (destaticing rod) 79, and polymer film 3 is destaticed.In addition, force the downstream of Destaticizing device 79 to be provided with annular knurl and give roller 80, annular knurl is given in the edge, both sides to polymer film 3.Batch in room 56 coiling machine 81 being provided with and having pressure roller 82, polymer film 3 is batching with roll in volume in the heart.
Use acylated cellulose as polymer in this implementation method.Triafol T (TAC) or cellulose diacetate (DAC) can be enumerated as acylated cellulose.
[embodiment 1]
In solution film-forming equipment 50 shown in Fig. 8, cast dope 51 on the surface of casting belt 62 and form casting films 65.While there is the casting films 65 limit stripping of self-supporting with stripper roll 63 support and obtain moistening film 68.The remaining solvent amount of this moistening film 68 obtained is 30 quality %.
Hold the both side ends of moistening film 68 with clip 5 in 1st tenter frame apparatus 2.The moistening film 68 being 30 quality % by remaining solvent amount is afterwards delivered to baking temperature and is preheating zone 2a, the drawing zone 2b of 140 DEG C and stretching relax zone 2c and carries out preheating, stretching and stretch laxly becoming polymer film 3.When the width of the moistening film 68 before stretching is set to 100%, the extensibility in the drawing zone 2b of the 1st tenter frame apparatus 2 is 105%.The remaining solvent amount leaving the polymer film 3 of the 1st tenter frame apparatus 2 is below 1 quality % (such as 1 quality %).
By the both side ends of trimming device 73 cutting polymer film 3 in downstream being arranged at the 1st tenter frame apparatus 2.Afterwards polymer film 3 is delivered to the 2nd tenter frame apparatus 2.In 2nd tenter frame apparatus 2, while to hold remaining solvent amount be that to deliver to baking temperature be preheating zone 2a, the drawing zone 2b of 175 DEG C and stretching relax zone 2c the both side ends limit of the polymer film 3 of 1 quality % and carry out preheating, stretching and stretch lax with clip 5.When the width of the polymer film 3 before stretching is set to 100%, the extensibility in drawing zone 2b is 120%.
By the both side ends of trimming device 73 cutting polymer film 3 in downstream being arranged at the 2nd tenter frame apparatus 2.Be wound in multiple roller 77 in hothouse 54 more afterwards and fully promote the drying of polymer film 3 during transmitting.Polymer film 3 is cooled to roughly to deliver to after room temperature in cooling chamber 55 and batches room 56, in core, obtain roll polymer film 3 while batch with pressure roller 82 squish lip.In addition, before batching, by forcing Destaticizing device 79 adjustment belt voltage, and, give roller 80 by annular knurl and give annular knurl.
As shown in Figure 9, the length of non-handle part is set to L1 (unit: mm), the length of handle part 31b, 32b is set to L2 (unit: mm), support seat 30 gap each other of neighboring clips 5 is set to L3 (unit: mm), the length of clip 5 is set to L4 (unit: mm), clip 5 and clip 5 interval (hereinafter referred to as clip interval) is set to L5 (unit: mm).Non-handle part is the gap between each clamper 31,32, non-holding polymer film 3.These each length and interval L1 ~ L5 are the length on the direction of transfer A of film.
Handle part 31b, 32b and non-handle part preferably meet 1mm≤L1≤2.5mm, 50mm≤L2≤150mm.When L1 is more than 1mm with less than compared with during 1mm, in the more difficult contact of the clip that the bend of guide rail is adjacent.During below 2.5mm compared with when being greater than 2.5mm, more positively suppress optic axis deviation.Further, when L2 is more than 50mm with less than compared with during 50mm, the quantity of clip is few, lower ground suppression equipment cost.During below 150mm compared with when being greater than 150mm, at stenter rail bends, portion gives enough radiuses, the more difficult contact of neighboring clips.Further, support seat 30 is slit into 2 handle part 31b by non-grip portion, 32b, so there is no non-handle part and as compared with a long handle part on film direction of transfer with being set to, the hold of the film in each clip 5 evenly.Therefore, the deviation of the optic axis in each clip 5 is suppressed better.
The support seat 30 gap L3 each other of neighboring clips 5 preferably meets 1mm≤L3≤2.5mm.When L3 is more than 1mm with less than compared with during 1mm, in the more difficult contact of the clip that the bend of guide rail is adjacent.When L3 is below 2.5mm compared with when being greater than 2.5mm, more positively suppress optic axis deviation.In addition, when clip 5 moves to each bend 11d, 12d of the 1st, 2 guide rails 11,12, or when when arranging the shrinking zone of minimizing a pair clip spacing, clip 5 moves to this shrinking zone, in neighboring clips 5, the both ends of the medial margin of the film width B of base 33b near and easily contact.Therefore, also by this part is set as R shape or conical by its shape, neighboring clips 5 is not contacted.Now, because the R shape of clip 5 and conical by its shape are difficult to contact, so can reduce L3, the lower limit of preferred L3 declines.
The length L4 of clip 5 is preferably 101mm≤L4≤302.5.When L4 is more than 101mm with less than compared with during 101mm, can stably hold with minority clip, lower ground suppression equipment cost.Further, when L4 is below 302.5mm compared with when being greater than 302.5mm, at stenter rail bends, portion gives enough bending radius, the more difficult contact of neighboring clips 5.In addition, when clip 5 moves to each bend 11b, 12b of the 1st, 2 guide rails 11,12, in neighboring clips 5, the both ends of the medial margin of the film width B of framework 33 near and easily contact.Therefore, also by this part is set as R shape or conical by its shape, neighboring clips 5 is not contacted.Now, in the part that R shape and the conical by its shape by clip 5 shortens, the higher limit of preferred L4 declines.
As shown in FIG. 9 and 10, in embodiment 1, be set to as follows in the 1st, the 2nd tenter frame apparatus 2: the length of the gap between each clamper 31,32 and the non-handle part length L1=1.8mm of non-holding polymer film 3, each clamper 31,32 and handle part length L2=62mm, the support seat 30 gap L3=1.8mm each other of neighboring clips 5, clip length L4=126mm, clip interval L5=1.6mm.Now, the pitch of clip 5 or P1=127.6mm, 1st, in 2nd tenter frame apparatus 2, be set to the angle of bend 0 (with reference to Fig. 5) of each bend 11b, 11d, 12b, 12d=2 °, bending radius=7000mm, during to make to move to each bend 11b, 11d, 12b, 12d, neighboring clips 5 does not contact each other.In addition, polymer film 3 is formed by DAC.
And, in the polymer film 3 stretched by the 1st, the 2nd tenter frame apparatus 2, use optical detecting device that the optic axis amplitude of fluctuation from clip 5 front end of film width B to 150mm inboard portion is measured 100m continuously.And the amplitude of fluctuation hour (less than ± 0.50 °) of optic axis is for qualified, and when the amplitude of fluctuation of optic axis is large, (more than ± 0.50 °) is set to defective.Below, to embodiment 1, change the material of the length L1 of non-handle part, handle part length L2, support seat interval L3, clip length L4, clip interval L5, pitch P1 and polymer film 3, obtain embodiment 2 ~ 6 and comparative example 1 ~ 4.Other film manufacturing conditions are identical with embodiment 1.By the condition of these embodiments and comparative example and result shown in Figure 10.
The result of this experiment, in embodiment 1 ~ 6, can reduce the amplitude of fluctuation of the optic axis of the polymer film 3 after stretching, and can make the narrow scope of trimming.Therefore, the productivity ratio of polymer film 3 is good.Further, in comparative example 1 ~ 4, the amplitude of fluctuation of the optic axis of the polymer film 3 after stretching is large, and the scope on limit broadens.Therefore, rate variance is produced.
And, as shown in figure 11, use and there is the clip 90 replacement support seat 30 that approximate center on film direction of transfer A is provided with the support seat 91 of recess 91d, carried out same experiment.Now, have also been obtained same result.In addition, support seat 91 and clamper 31,32 identical, be made up of axle portion 91a, handle part 91b and head 91c.Be provided with 2 handle part 91b, between each handle part 91b, be provided with recess 91d.
And, in support seat 91, be integrally formed 2 handle parts 91b, 92b, between these 2 handle parts 91b, 92b, be formed with the recess 91d as non-handle part.Therefore, identical with support seat 30, the hold of the film in each clip 5 evenly.Therefore, the deviation of the optic axis in each clip 5 is suppressed better.
Claims (6)
1. a film stretching device, is characterized in that possessing:
Pair of guide rails, has line part and bend, and described line part extends to the direction of transfer of film, and described bend bends to the width of described film; And
Multiple clip, hold described edge, film both sides and described multiple clip moves along described guide rail while holding described film and described film is stretched to width, described multiple clip arranges with the pitch corresponding to the rate of curving of described bend, when described multiple clip is arranged to mobile described bend, described neighboring clips gap each other diminishes in adjacent clip each other discontiguous scope
Described clip possesses framework and support seat, described framework has the base of the side edge part carrying described film, the holding position and decontroling between the ejected position that holds that described support seat is rotatably installed on described framework and holds described film between described base rotates, described support seat has the non-handle part not holding described film and 2 handle parts holding described film, described non-handle part is arranged at the approximate center of film direction of transfer, described 2 handle parts are divided by described non-handle part, described support seat meets 1mm≤L1≤2.5mm and 50mm≤L2≤150mm, wherein,
L1 is the length of described non-handle part,
L2 is the length of 1 described handle part.
2. film stretching device as claimed in claim 1, is characterized in that,
Described support seat is made up of 2 clampers independently rotated, and described 2 clampers have described handle part respectively, and described 2 clampers are vacated gap and arrange on film direction of transfer, and described gap is described non-handle part.
3. film stretching device as claimed in claim 1, is characterized in that,
In described support seat, described 2 handle parts are integrally formed, and form recess in the approximate center of film direction of transfer, and described recess is described non-handle part.
4. film stretching device as claimed in claim 1, is characterized in that,
When the described support seat gap each other of described adjacent clip is set to L3, meet 1mm≤L3≤2.5mm.
5. film stretching device as claimed in claim 1, is characterized in that,
When the length of described clip is set to L4, meet 101mm≤L4≤302.5mm.
6. a film drawing process, is characterized in that, the method possesses following steps:
Hold step, hold the edge, both sides of film with multiple clip; And,
Stretching step, by moving described multiple clip along pair of guide rails, described film is stretched to width, described pair of guide rails has line part and bend, described line part extends to the direction of transfer of described film, described bend bends to the width of described film, described multiple clip arranges with the pitch corresponding to the rate of curving of described bend, described multiple clip is arranged to described neighboring clips gap each other when moving described bend and diminishes in adjacent clip each other discontiguous scope
Described clip possesses framework and support seat, described framework has the base of the side edge part carrying described film, the holding position and decontroling between the ejected position that holds that described support seat is rotatably installed on described framework and holds described film between described base rotates, described support seat has the non-handle part not holding described film and 2 handle parts holding described film, described non-handle part is arranged at the approximate center of film direction of transfer, described 2 handle parts are divided by described non-handle part, described support seat meets 1mm≤L1≤2.5mm and 50mm≤L2≤150mm, wherein,
L1 is the length of described non-handle part,
L2 is the length of 1 described handle part.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010064578 | 2010-03-19 | ||
| JP064578/2010 | 2010-03-19 | ||
| JP2011042186A JP5602661B2 (en) | 2010-03-19 | 2011-02-28 | Film stretching apparatus and method |
| JP042186/2011 | 2011-02-28 |
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| Publication Number | Publication Date |
|---|---|
| CN102205635A CN102205635A (en) | 2011-10-05 |
| CN102205635B true CN102205635B (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110066303.XA Active CN102205635B (en) | 2010-03-19 | 2011-03-18 | Film stretching device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150137705A (en) * | 2014-05-30 | 2015-12-09 | 삼성전자주식회사 | Film manufacturing apparatus and method thereof |
| CN106313494B (en) * | 2016-08-26 | 2018-10-09 | 艾能赛克机械设备(江苏)有限公司 | A kind of drawing and forming system for acrylic sheet material |
| CN106313493B (en) * | 2016-08-26 | 2018-09-28 | 艾能赛克机械设备(江苏)有限公司 | A kind of conveyer system for acrylic sheet material |
| CN106273389B (en) * | 2016-08-26 | 2018-09-11 | 艾能赛克机械设备(江苏)有限公司 | A kind of heating system for acrylic sheet material |
| CN106239887B (en) * | 2016-08-26 | 2018-10-09 | 艾能赛克机械设备(江苏)有限公司 | A kind of clamping device for acrylic sheet material |
| CN112936138B (en) * | 2021-02-23 | 2023-07-21 | 重庆恩捷纽米科技股份有限公司 | Diaphragm extraction and film penetrating clamp and film penetrating method |
| CN113152015B (en) * | 2021-04-30 | 2022-01-18 | 清远市诚鸿纺织有限公司 | Cloth straining device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005035131A (en) * | 2003-07-18 | 2005-02-10 | Fuji Photo Film Co Ltd | Tentering machine |
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| JPS60239559A (en) * | 1984-05-11 | 1985-11-28 | 太平工機株式会社 | Tenter chain |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005035131A (en) * | 2003-07-18 | 2005-02-10 | Fuji Photo Film Co Ltd | Tentering machine |
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| CN102205635A (en) | 2011-10-05 |
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