CN102717511A - Biaxially oriented film binding-type horizontal stretching method and device - Google Patents
Biaxially oriented film binding-type horizontal stretching method and device Download PDFInfo
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- CN102717511A CN102717511A CN2012102031630A CN201210203163A CN102717511A CN 102717511 A CN102717511 A CN 102717511A CN 2012102031630 A CN2012102031630 A CN 2012102031630A CN 201210203163 A CN201210203163 A CN 201210203163A CN 102717511 A CN102717511 A CN 102717511A
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Abstract
The invention relates to a biaxially oriented film binding-type horizontal stretching method and a device. Flexible binding ropes are utilized to enable two edges of a preheated film to be bound so as to compress the surface of a longitudinal stretching roller, wherein the flexible binding ropes are outwards arranged on both sides of the longitudinal stretching roller symmetrically and helically and are less than a circle of the longitudinal stretching roller; the film rotating along with the longitudinal stretching roller is stretched in the longitudinal direction, and the friction force between the film and the binding ropes is far greater than that between the film and the surface of the longitudinal stretching roller, so that the film is stretched in a continuously linear manner in the horizontal direction at the same time when the binding ropes do a helical motion towards the outer side of the longitudinal stretching roller, and the film can be stretched synchronously in the longitudinal direction and in the horizontal direction. The two binding ropes are respectively supported by turning pulleys and tensioning pulleys to form respective closed loops, and are driven by the longitudinal stretching roller to do a circulating motion. The horizontal stretching ratio can be regulated by changing the distance between the two binding ropes at a binding entry point and a stripping point on the longitudinal stretching roller. Compared with the traditional horizontal stretching technology adopting a gripping head to clamp, the biaxially oriented film binding-type horizontal stretching method and the device are characterized by horizontal stepless stretching and small size of the device, are low in cost and energy consumption, have an easy-to-control stretching process.
Description
Technical field
The present invention relates to the processing of high molecular material method and apparatus, specifically be meant biaxially oriented film cluster cross directional stretch method and apparatus.
Technical background
Developing rapidly of raising that packing material is required along with packaging industry and various functional membranes market; Biaxially oriented film is owing to have multiple performances such as good tensile property (hot strength is 3-5 a times of non-stretched film), barrier property, optical property, heat-resisting cold resistance, dimensional stability, thickness evenness; And have characteristics such as speed of production is fast, production capacity is big, efficient height, become the focus that people pay close attention to.
The biaxially oriented film technology has stretching one by one and synchro-draw two big classes.The biaxially oriented film technology mainly adopts stretching technique one by one on the domestic and international market at present.Stretching technique is to adopt high low speed draw roll that film is carried out longitudinal stretching (MDO) earlier one by one, adopts transverse stretching machine that film is carried out cross directional stretch (TDO) again.The cross directional stretch machine makes film carry out cross directional stretch by two groups of chain horizontal rotations in the track of opened with certain angle that have clip.One by one stretching technique make its have film gauge uniformity be difficult to control, characteristics such as device structure is huge, energy consumption is big, the difficult control of transverse temperature difference, cost height.
Germany Bruckner company is applied to electromagnetic technique on the biaxial tension equipment, goes out line style synchronous motor (LISIM) synchro-draw equipment in conjunction with self membrane equipment development.The excellent more characteristic that has that this synchro-draw technology makes biaxially oriented film and the production of common stretcher one by one.But this synchro-draw technology makes the chain folder that slide block carries have the alternating current generator of synchronous linear response to drive respectively, makes the manufacturing cost of equipment improve, and energy consumption increases, and there are characteristics such as restive and device structure be huge in this technology simultaneously.
Device structure to present biaxial tension technology and equipment exist is huge, expensive, high energy consumption and problem such as restive, develops a kind of novel bidirectional extending method and equipment and solves above problem and be significant.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of prior art, the biaxially oriented film cluster cross directional stretch that a kind of volume is little, cost is low, energy consumption is low, be easy to control method is provided.
The present invention also aims to provide a kind of biaxially oriented film cluster cross directional stretch device of realizing said method.
The object of the invention is realized through following technical scheme:
A kind of biaxially oriented film cluster cross directional stretch method; The flexibility binding rope that is less than all spiral distributions is set in vertical withdrawing roll bilateral symmetry laterally; The two edges that make the film of preheating are tied up and are compressed vertical withdrawing roll surface; Film is along with the rotation of vertical withdrawing roll by longitudinal stretching the time, utilize between film and binding rope frictional force much larger than and vertical withdrawing roll surface between frictional force, the binding rope is spinned outside the vertical withdrawing roll makes film when moving laterally by continuous linear stretch.
A kind ofly realize that the apparatus structure of said biaxially oriented film cluster cross directional stretch method is following: cluster cross directional stretch unit adopts vertical withdrawing roll bilateral symmetry to be less than the flexibility binding rope that all spirals distribute laterally to make the film two edges of preheating tied up and compress vertical withdrawing roll surface, along with the withdrawing roll rotating thin film is synchronized stretching; Two flexible binding ropes are supported by angle pulley and tension pulley block and form separately loop and done shuttling movement by vertical withdrawing roll drive; Tension pulley block is fixed on the tension pulley block holder, and compresses the degree on vertical withdrawing roll surface through the flexible binding rope of Sliding Control of screw mandrel control tension pulley block holder; Angle pulley is separately fixed on two pairs of reference arms and the stretching arm; And adjust distance between reference arm and the stretching arm respectively through screw mandrel and control vertical withdrawing roll place two flexible binding ropes and tie up point of penetration and tie up the distance between the pick-up point, and then realize the horizontal stepless stretching of film.
The present invention adopts biaxially oriented film cluster cross directional stretch method and device, compares with the synchro-draw thin film technique with existing the stretching one by one, has following advantage:
1, two binding ropes are tied up point of penetration on vertical withdrawing roll and the distance of tying up between the pick-up point is adjusted the cross directional stretch ratio through changing, and realize horizontal stepless stretching;
2, only adopt the withdrawing roll structure to realize the synchro-draw thin film technique, remove traditional cross directional stretch chain guide mechanism, make the biaxial tension occupation area of equipment dwindle, equipment cost reduces;
3, only need withdrawing roll is carried out temperature control, solve traditional transverse temperature difference and be difficult to control a difficult problem, cut down the consumption of energy simultaneously;
4, the simple easy operating of structural device is realized control easily.
Description of drawings
Fig. 1 biaxially oriented film cluster cross directional stretch cellular construction sketch map.
Fig. 2 biaxially oriented film cluster cross directional stretch unit C-C cross-sectional view.
Fig. 3 biaxially oriented film cluster cross directional stretch cells D-D cross-sectional view.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further explanation, but the scope that the present invention requires to protect is not limited thereto.
Embodiment
Referring to Fig. 1, Fig. 2 and Fig. 3; Device of the present invention outwards twines less than the flexible binding rope of the first flexible binding rope 3 and second in a week 13, first angle pulley 6, second angle pulley 10, the 3rd angle pulley 16, the 4th angle pulley 19, first tension pulley block 4, second tension pulley block 12, first screw mandrel 8, second screw mandrel 14, the 3rd screw mandrel 15, first reference arm 5, second reference arm 11, first stretching arm 17, second stretching arm 18, tension pulley block holder 7 and base carrier 2 by vertical withdrawing roll 1, in vertical withdrawing roll 1 bilateral symmetry and constitutes; Wherein first angle pulley 6, the 4th angle pulley 19 and first tension pulley block 4 support the first flexible binding rope 3; Second angle pulley 10, the 3rd angle pulley 16 and second tension pulley block 12 support second flexible binding rope 13, the two flexible bindings loop of restricting separately and are driven by vertical withdrawing roll 1 and do shuttling movement; First angle pulley 6 and second angle pulley 10 are separately fixed on first reference arm 5 and second reference arm 11; The 3rd angle pulley 16 and the 4th angle pulley 19 are separately fixed on first stretching arm 17 and second stretching arm 18; First tension pulley block 4 and second tension pulley block 12 are fixed on the tension pulley block holder 7; On first reference arm 5, second reference arm 11, first stretching arm 17, second stretching arm 18 and the tension pulley block holder 7 immobilizing foundation bracing frames 2 and can slide; First screw mandrel 8 can be controlled the slip of tension pulley block holder 7; Distance between second screw mandrel, 14 adjustment first reference arms 5 and second reference arm 11; Distance between the 3rd screw mandrel 15 adjustment first stretching arms 17 and second stretching arm 18; The first flexible binding rope 3 is tied up with vertical withdrawing roll 1 surface has two point of contacts, and the point of contact of film upstream end is point of penetration A, and the point of contact of film peel tip is pick-up point B; The second flexible binding rope 13 is tied up with vertical withdrawing roll 1 surface has two point of contacts, and the point of contact of film upstream end is point of penetration A ', and the point of contact of film peel tip is pick-up point B '.
Through the position of first screw mandrel 8 adjustment tension pulley block holders 7, first flexible binding rope 3 and the second flexible binding rope 13 that makes the film 9 of preheating be easy to get into is located with vertical withdrawing roll 1 surperficial point of penetration A, A '; Make film 9 two edges tied up through first screw mandrel, 8 adjustment tension pulley block holders 7 and be pressed on vertical withdrawing roll 1 surface by first flexible binding the rope 3 and second flexible binding rope 13; Rotation along with vertical withdrawing roll 1; First flexible binding the rope 3 and second flexible binding rope 13 compresses film 9 two edges and rotates thereupon; Since the frictional force between film and binding rope much larger than and vertical withdrawing roll surface between frictional force, two binding ropes are spinned outside vertical withdrawing roll and are made film laterally by continuous linear stretch when moving; Restrict 13 with the pick-up point B on vertical withdrawing roll 1 surface, when B ' locates when film 9 rotates to the 3 and second flexible binding of the first flexibility binding rope, film begins to peel off vertical withdrawing roll 1; The distance L a that ties up between point of penetration A, the A ' through first flexible binding rope 3 and the second flexible binding rope 13 of the distance control between second screw mandrel 14 adjustment first reference arms 5 and second reference arm 11, and then control the input width of film; Tie up the output width of the distance L b control film between pick-up point B, the B ' through first flexible binding the rope 3 and second flexible binding rope 13 of the distance control between second screw mandrel, 15 adjustment first stretching arms 17 and second stretching arm 18, and then realize horizontal stepless stretching.
Claims (4)
1. biaxially oriented film cluster cross directional stretch method; It is characterized in that: flexibility binding rope that symmetry distributes less than all spirals laterally is set in vertical withdrawing roll both sides the two edges of the film of preheating are tied up and compresses vertical withdrawing roll surface; When film rotates by longitudinal stretching along with vertical withdrawing roll; Utilize between film and binding rope frictional force much larger than and vertical withdrawing roll surface between frictional force, the binding rope is spinned to the vertical withdrawing roll outside makes film laterally by continuous linear stretch when moving.
2. a device of realizing the said biaxially oriented film cluster of claim 1 cross directional stretch method is characterized in that; Constitute by one or more cluster cross directional stretch unit; Described cluster cross directional stretch unit is mainly by vertical withdrawing roll (1); Outwards twine the first flexible binding rope (3) and the second flexible binding rope (13) in vertical withdrawing roll (1) bilateral symmetry less than a week; First angle pulley (6); Second angle pulley (10); The 3rd angle pulley (16); The 4th angle pulley (19); First tension pulley block (4); Second tension pulley block (12); First screw mandrel (8); Second screw mandrel (14); The 3rd screw mandrel (15); First reference arm (5); Second reference arm (11); First stretching arm (17); Second stretching arm (18); Tension pulley block holder (7) and base carrier (2) constitute; Wherein the first flexible binding rope (3) and the second flexible binding rope (13) are respectively by first angle pulley (6), the 4th angle pulley (19) and first tension pulley block (4); Second angle pulley (10), the 3rd angle pulley (16) and second tension pulley block (12) support form vertical withdrawing roll (1) drive of loop quilt separately and do shuttling movement; Make the two edges of the film (9) of preheating tie up point of penetration (A; A ') and tie up between the pick-up point (B, B ') and to be tied up and compress vertical withdrawing roll (1) surface; The first flexible binding rope (3) place on first angle pulley (6), the 4th angle pulley (19) and first tension pulley block (4) with the second flexible binding rope (13) place guarantee on second angle pulley (10), the 3rd angle pulley (16) and second tension pulley block (12) the first flexible binding rope (3) and second flexibility bundle restrict (13) can be smoothly along with vertical withdrawing roll (1) shuttling movement; First angle pulley (6) and second angle pulley (10) are separately fixed on first reference arm (5) and second reference arm (11); The 3rd angle pulley (16) and the 4th angle pulley (19) are separately fixed on first stretching arm (17) and second stretching arm (18); First tension pulley block (4) and first tension pulley block (12) are fixed on the tension pulley block holder (7); First reference arm (5), second reference arm (11), first stretching arm (17), second stretching arm (18) and tension pulley block holder (7) immobilizing foundation bracing frame (2) are gone up and can be slided.
3. the device of realization biaxially oriented film cluster cross directional stretch according to claim 2 is characterized in that: said cluster cross directional stretch unit also comprises second screw mandrel (14) and second screw mandrel (15); The distance adjustment first flexible binding rope (3) and the second flexible binding rope (13) through between first screw mandrel (14) adjustment first reference arm (5) and second reference arm (11) are tied up point of penetration (A on vertical withdrawing roll (1); The input width of the distance A ') (La) control film (9); The distance adjustment first flexible binding rope (3) and the second flexible binding rope (13) through between the 3rd screw mandrel (15) adjustment first stretching arm (17) and second stretching arm (18) are tied up pick-up point (B on vertical withdrawing roll (1); The output width of the distance B ') (Lb) control film (9) is realized horizontal stepless stretching.
4. the device of realization biaxially oriented film cluster cross directional stretch according to claim 3 is characterized in that: said cluster cross directional stretch unit also comprises first screw mandrel (8); The position of first tension pulley block (4) and first tension pulley block (12) is controlled in position through first screw mandrel (8) adjustment tension pulley block holder (7), and then adjusts the degree that two flexible binding ropes compress vertical withdrawing roll surface (1), is convenient to film (9) and compresses.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210203163.0A CN102717511B (en) | 2012-06-19 | 2012-06-19 | Biaxially oriented film binding-type horizontal stretching method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210203163.0A CN102717511B (en) | 2012-06-19 | 2012-06-19 | Biaxially oriented film binding-type horizontal stretching method and device |
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| CN102717511A true CN102717511A (en) | 2012-10-10 |
| CN102717511B CN102717511B (en) | 2015-06-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063689A (en) * | 2012-12-27 | 2013-04-24 | 中国科学技术大学 | Constant width film stretching device combined with X-ray scattering, and experimental method thereof |
| CN104723546A (en) * | 2015-03-25 | 2015-06-24 | 华南理工大学 | Stepless biaxial tension method and device for film based on saddle surface transition |
| CN110802833A (en) * | 2019-11-07 | 2020-02-18 | 湖南工业大学 | Film biaxial stretching device |
| CN111216345A (en) * | 2019-11-07 | 2020-06-02 | 湖南工业大学 | Synchronous biaxial stretching device of film |
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| JPH0289619A (en) * | 1988-09-28 | 1990-03-29 | Kao Corp | Manufacture of film |
| JP2007022042A (en) * | 2005-07-21 | 2007-02-01 | Kaneka Corp | Manufacturing method of polymer film and utilization of polymer film |
| CN102015253A (en) * | 2008-04-30 | 2011-04-13 | 林道尔.多尼尔有限责任公司 | Apparatus for stretching film webs transversely |
| US20110200702A1 (en) * | 2008-10-22 | 2011-08-18 | Hiroshi Harada | Film stretcher |
| CN102320127A (en) * | 2011-06-30 | 2012-01-18 | 重庆交通大学 | Twin shaft synchro-draw device |
| CN202764202U (en) * | 2012-06-19 | 2013-03-06 | 广州华新科实业有限公司 | Binding type transverse stretching device for biaxially oriented film |
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2012
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Patent Citations (6)
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| JPH0289619A (en) * | 1988-09-28 | 1990-03-29 | Kao Corp | Manufacture of film |
| JP2007022042A (en) * | 2005-07-21 | 2007-02-01 | Kaneka Corp | Manufacturing method of polymer film and utilization of polymer film |
| CN102015253A (en) * | 2008-04-30 | 2011-04-13 | 林道尔.多尼尔有限责任公司 | Apparatus for stretching film webs transversely |
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| CN102320127A (en) * | 2011-06-30 | 2012-01-18 | 重庆交通大学 | Twin shaft synchro-draw device |
| CN202764202U (en) * | 2012-06-19 | 2013-03-06 | 广州华新科实业有限公司 | Binding type transverse stretching device for biaxially oriented film |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063689A (en) * | 2012-12-27 | 2013-04-24 | 中国科学技术大学 | Constant width film stretching device combined with X-ray scattering, and experimental method thereof |
| CN104723546A (en) * | 2015-03-25 | 2015-06-24 | 华南理工大学 | Stepless biaxial tension method and device for film based on saddle surface transition |
| WO2016150222A1 (en) * | 2015-03-25 | 2016-09-29 | 华南理工大学 | Saddle curved-surface transition-based stepless bidirectional stretching method and device for film |
| CN104723546B (en) * | 2015-03-25 | 2017-04-05 | 华南理工大学 | The stepless bidirectional extending method of thin film based on saddle surface transition |
| KR20180022629A (en) * | 2015-03-25 | 2018-03-06 | 사우쓰 차이나 유니버시티 오브 테크놀로지 | Saddle curvature transition-based thin film step-less bi-directional stretching method and device |
| RU2688584C2 (en) * | 2015-03-25 | 2019-05-21 | Саус Чайна Юниверсити Оф Текнолоджи | Method and device for continuous two-axis stretching of film based on transition through saddle-shaped surface |
| KR102033070B1 (en) * | 2015-03-25 | 2019-10-16 | 사우쓰 차이나 유니버시티 오브 테크놀로지 | Saddle curved transition-based thin film stepless bidirectional stretching method and device |
| US10836096B2 (en) | 2015-03-25 | 2020-11-17 | South China University Of Technology | Method and device of film stepless biaxial tension based on saddle-shaped surface transition |
| CN110802833A (en) * | 2019-11-07 | 2020-02-18 | 湖南工业大学 | Film biaxial stretching device |
| CN111216345A (en) * | 2019-11-07 | 2020-06-02 | 湖南工业大学 | Synchronous biaxial stretching device of film |
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