CN108082990B - Film winding method and device based on traction path compensation - Google Patents
Film winding method and device based on traction path compensation Download PDFInfo
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- CN108082990B CN108082990B CN201711335381.9A CN201711335381A CN108082990B CN 108082990 B CN108082990 B CN 108082990B CN 201711335381 A CN201711335381 A CN 201711335381A CN 108082990 B CN108082990 B CN 108082990B
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004804 winding Methods 0.000 title claims description 24
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 238000005096 rolling process Methods 0.000 claims abstract description 16
- 239000012528 membrane Substances 0.000 claims description 24
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000037303 wrinkles Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010096 film blowing Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
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- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention discloses a film rolling method and a film rolling device based on traction path compensation. The device is according to the direction of conveyance of film bubble, die head, first herringbone plate and second herringbone plate set gradually from bottom to top, and the pull roll is located one side of second herringbone plate, and first herringbone plate and second herringbone plate mutually perpendicular set up, and the first herringbone plate is mutually perpendicular to the folding direction of film bubble and the folding direction of second herringbone plate to film bubble. The invention has simple principle, can realize that the traction paths of all points on the same circumference of the film bubble are the same, has the same cooling condition, and can effectively avoid film folds caused by different traction paths and different cooling conditions.
Description
Technical Field
The invention relates to the technical field of blown film manufacturing, in particular to a film winding method and device based on traction path compensation.
Background
Film rolling is one of important processes in film production lines, the rolling process has direct influence on the surface quality of the film, and if the rolling process is not perfect, the phenomena of irregular film rolling, wrinkling and the like can occur.
In the production of the cast film, the film can cause uneven surface due to the action of traction tension, so before rolling, a flattening device is required to be arranged on the film to improve the production quality of film products, as shown in fig. 1, a roll flattening method is generally adopted at present, when the film 6 passes through a roll 7 (the arrow direction in the figure is the conveying direction of the film), the actual convexity and the actual deflection of the roll are adjusted, the film can be prevented from wrinkling and stretching and straightening during operation, and the requirement of a certain transverse thickness difference is met.
In film blowing production, before film rolling, insufficient cooling or uneven cooling of each point of the film caused by different film traction paths is one of main reasons for generating wrinkles, and the distance passed by each point on a film bubble is different in the process of flattening the film from a cylindrical shape into two layers of laminated flat films by a herringbone plate. The chevron plate mainly acts to stabilize the bubble and gradually fold the cylindrical film into a planar shape. However, in the process of flattening the membrane bubble, each point on the same circumference of the membrane bubble cannot be synchronously contacted with the herringbone plate, so that the cooling of each point on the same circumference of the membrane bubble is prior and later, the shrinkage of the membrane is inconsistent, wrinkles are easily formed, and the phenomenon is more obvious particularly when the water-cooled herringbone plate with good cooling effect is adopted. In addition, wrinkles generated by the bubbles are more serious when the bubbles are unstable and vibrate.
In order to overcome the above problems, if the distances travelled by the paths of the points on the circumference of the bubble are identical when passing through the chevron, the cooling conditions are uniform, and it is possible to avoid severe wrinkles. At present, a scheme of arranging rolling wheels on the herringbone plate inserting plates is adopted, and the number of gaps between the herringbone plate inserting plates and the films is reduced by lengthening the length of the rolling shafts, so that the occurrence of wrinkles of the films is reduced. However, the rolling wheel adopted by the method has a complex structure and high application cost. The tension in the film traction and winding process is accurately controlled by designing a special control system, so that the film wrinkling can be effectively reduced, but the defects of complicated control system, high cost and the like are also overcome.
Therefore, the development of a novel film rolling method and a novel film rolling device has great significance for solving the problems of different paths of each point of a film bubble caused by the traction and rolling of a blown film, film surface wrinkles caused by uneven cooling and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a film winding method based on traction path compensation.
Another object of the present invention is to provide a film winding device based on traction path compensation for implementing the above method.
The technical scheme of the invention is as follows: in the film winding method based on traction path compensation, the film bubble sequentially passes through a first herringbone plate and a second herringbone plate which are mutually vertically arranged in the traction process, when the film bubble passes through the first herringbone plate, the traction paths of all points on the same circumference of the film bubble are unequal, and the traction paths of all points on the same circumference of the film bubble are compensated through the vertical arrangement of the second herringbone plate, so that the same traction path is finally obtained.
The compensation process of the second herringbone plate to the traction path of each point on the same circumference of the membrane bubble specifically comprises the following steps: when the film bubble passes through the first herringbone plate, each point on the same circumference of the film bubble is asynchronous with the contact of the first herringbone plate, and cooling is carried out before cooling; when the film bubble passes through the second herringbone plate, as the second herringbone plate is perpendicular to the first herringbone plate, the sum of the traction path length of the second herringbone plate and the traction path length of the first herringbone plate is equal to each point on the same circumference of the film bubble, and the film bubble passes through the first herringbone plate and the second herringbone plate to finally obtain the same cooling condition. In the process, as the second herringbone plate is perpendicular to the first herringbone plate, the second herringbone plate plays a role in compensating the traction paths of all points on the same circumference of the film bubble, so that when the film bubble passes through the second herringbone plate from the outlet of the die head, the traction paths of all points on the same circumference of the film bubble are identical due to path compensation, the cooling condition is identical, and film folds caused by different traction paths and different cooling conditions can be effectively avoided.
The membrane bubble is in an inflation state after passing through the first lambdoidal plate. That is, the film bubble is cooled for the first time by the first chevron plate, is not folded directly into a flat shape and sent out, but is inflated again into a cylindrical shape, and is cooled for the second time by the second chevron plate and then folded into a flat shape and sent out.
The invention relates to a film winding device based on traction path compensation, which comprises a die head, a first herringbone plate, a second herringbone plate and a traction roller, wherein the die head, the first herringbone plate and the second herringbone plate are sequentially arranged from bottom to top according to the conveying direction of a film bubble, the traction roller is arranged on one side of the second herringbone plate, the first herringbone plate and the second herringbone plate are mutually perpendicular, and the folding direction of the film bubble by the first herringbone plate is perpendicular to the folding direction of the film bubble by the second herringbone plate.
The first herringbone plate comprises four first guide plates and two first guide shafts, the two first guide shafts are respectively arranged on two sides of the membrane bubble, the upper side and the lower side of each first guide shaft are respectively provided with one first guide plate, and the four guide plates are arranged in an X shape.
The two first guide shafts are arranged in parallel, the film bubble is folded when passing through a gap between the two first guide shafts, and the folding direction of the first lambdoidal plate on the film bubble is parallel to the axis direction of the first guide shafts.
The second herringbone plate comprises two second guide plates and two second guide shafts, the two second guide shafts are respectively arranged on two sides of the membrane bubble, one second guide plate is arranged on the lower side of each second guide shaft, and the two guide plates are in an inverted V shape.
The two second guide shafts are arranged in parallel, the film bubble is folded when passing through a gap between the two second guide shafts, and the folding direction of the second lambdoidal plate on the film bubble is parallel to the axis direction of the second guide shafts.
The distance between the second guide shaft and the outlet of the die head is the traction path of the film bubble.
In the above structure, the gap between the two first guide shafts in the first chevron should be slightly larger than the gap between the two second guide shafts in the second chevron, so that air in the tubular film bubble below the first chevron can pass through the gap between the two first guide shafts, and the film bubble folded by the two first guide shafts is still in a blown state.
When the film winding device based on traction path compensation is used, the principle is as follows: in the process of drawing the film bubble by using drawing roller, the film bubble can be passed through two mutually-perpendicular-arranged herringbone plates (i.e. the above-mentioned first herringbone plate and second herringbone plate) in turn, when the film bubble is passed through the first herringbone plate, the contact time of every point on the same circumference of film bubble and first herringbone plate is not identical, and the cooling process is before and after, and because the second perpendicularly-arranged herringbone plate can be used for compensating drawing path of every point on the same circumference of film bubble, so that in the course of from die head outlet position to second herringbone plate, the path compensation is implementedAnd the traction paths of the film bubbles at each point on the same circumference are the same, the cooling conditions are the same, and film folds caused by different traction paths and different cooling conditions can be effectively avoided. The specific principle of traction path compensation is as follows: when the bubble passes through the first gusset, the contact time of each point on the same circumference of the bubble and the first gusset are not consistent, the path length of the bubble passing from the inflated state to the folded state is also not consistent, and the traction path of the bubble unit contacted with the midpoint of the first guide plate (assumed to be L m ) Longer than the bubble unit traction path (assumed to be L s ). And the bubble re-inflation again passes through the vertically arranged second chevron, the pulling path length (L m ) The bubble unit of (2) is contacted with the edge of the second lambdoidal plate, and when the bubble unit is folded again, the traction path is L s A traction path (L) when passing through the first gusset s ) The shorter bubble unit contacts with the middle point of the second lambdoidal plate, and when the bubble unit is folded again, the traction path is L m . And respectively superposing the two traction paths at the same point, wherein the lengths of the traction paths of all points on the same circumferential surface of the membrane bubble are completely consistent when the membrane bubble reaches a fully folded state from a fully inflated state through the compensation action of the second herringbone plate after passing through the first herringbone plate and the second herringbone plate.
Compared with the prior art, the invention has the following beneficial effects:
the film winding method and the film winding device based on traction path compensation are simple in principle, the film bubble sequentially passes through two vertically arranged herringbone plates in the traction process, when the film bubble passes through the first herringbone plate, each point on the same circumference of the film bubble is inconsistent with the contact point before and after the contact point, cooling is prior and after the film bubble is cooled, and the second vertically arranged herringbone plate has the compensation effect on the traction paths of each point on the same circumference of the film bubble, so that in the process from the outlet of the die to the process of passing through the second herringbone plate, the traction paths of each point on the same circumference of the film bubble are identical due to path compensation, the cooling condition is identical, and film folds caused by different traction paths and different cooling conditions can be effectively avoided.
The film winding device based on traction path compensation is simple in structure and easy to realize, only two herringbone plates are vertically arranged in a film bubble traction path, film bubbles sequentially pass through the two herringbone plates which are vertically arranged, and the cooling effect can be obviously improved through the simple structure; and other devices and control systems are not needed, the parts are few, and the structure is simple. The device utilizes the compensation effect of two perpendicular arranged herringbone plates on the film bubble traction path, can eliminate the difference of traction paths of points on the same circumference of the film bubble in the traction rolling process when being applied to blown film production, and causes different cooling conditions, thereby leading to the surface fold of the film, ensuring the thickness of the film bubble to be even and the surface of the film to be smooth and clean.
In addition, the film winding method and the film winding device based on traction path compensation are wide in application range, suitable for most of film blowing production, and beneficial to improvement of film quality.
Drawings
Fig. 1 is a schematic diagram of a roll-spreading method used in the prior art.
Fig. 2 is a schematic structural diagram of the film winding device based on traction path compensation.
Fig. 3 is a schematic perspective view of the film winding device shown in fig. 2.
Detailed Description
The present invention will be described in further detail with reference to examples, but embodiments of the present invention are not limited thereto.
Examples
The film winding device based on traction path compensation comprises a die head 1, a first herringbone plate 2, a second herringbone plate 3 and a traction roller 4, wherein the die head, the first herringbone plate and the second herringbone plate are sequentially arranged from bottom to top according to the conveying direction of a film bubble 5, the traction roller is arranged on one side of the second herringbone plate, the first herringbone plate and the second herringbone plate are mutually perpendicular, and the folding direction of the film bubble by the first herringbone plate and the folding direction of the film bubble by the second herringbone plate are mutually perpendicular.
The first herringbone plate comprises four first guide plates 2-1 and two first guide shafts 2-2, the two first guide shafts are respectively arranged on two sides of the membrane bubble, the upper side and the lower side of each first guide shaft are respectively provided with one first guide plate, and the four guide plates are arranged in an X shape. The two first guide shafts are arranged in parallel, the film bubble is folded when passing through a gap between the two first guide shafts, and the folding direction of the first lambdoidal plate on the film bubble is parallel to the axis direction of the first guide shafts.
The second herringbone plate comprises two second guide plates 3-1 and two second guide shafts 3-2, the two second guide shafts are respectively arranged on two sides of the membrane bubble, one second guide plate is arranged on the lower side of each second guide shaft, and the two guide plates are in an inverted V shape. The two second guide shafts are arranged in parallel, the film bubble is folded when passing through a gap between the two second guide shafts, and the folding direction of the second lambdoidal plate on the film bubble is parallel to the axis direction of the second guide shafts.
The distance between the second guide shaft and the outlet of the die head is the traction path of the film bubble.
In the above structure, the gap between the two first guide shafts in the first chevron should be slightly larger than the gap between the two second guide shafts in the second chevron, so that air in the tubular film bubble below the first chevron can pass through the gap between the two first guide shafts, and the film bubble folded by the two first guide shafts is still in a blown state.
When the film winding device based on traction path compensation is used, the principle is as follows: in the process of traction, the film bubble sequentially passes through two herringbone plates (namely the first herringbone plate and the second herringbone plate) which are mutually perpendicular, when the film bubble passes through the first herringbone plate, the contact time of each point on the same circumference of the film bubble and the first herringbone plate is inconsistent, cooling is carried out before and after the film bubble is cooled, and because the second herringbone plate which is vertically arranged has a compensation effect on the traction paths of each point on the same circumference of the film bubble, in the process from the die head outlet to the process of passing through the second herringbone plate, because of path compensation, the traction paths of each point of the film bubble on the same circumference are identical, the cooling condition is identical, and film folds caused by different traction paths and different cooling conditions can be effectively avoided. Wherein, the traction path compensation deviceThe principle of the body is as follows: when the bubble passes through the first gusset, the contact time of each point on the same circumference of the bubble and the first gusset are not consistent, the path length of the bubble passing from the inflated state to the folded state is also not consistent, and the traction path of the bubble unit contacted with the midpoint of the first guide plate (assumed to be L m ) Longer than the bubble unit traction path (assumed to be L s ). And the bubble re-inflation again passes through the vertically arranged second chevron, the pulling path length (L m ) The bubble unit of (2) is contacted with the edge of the second lambdoidal plate, and when the bubble unit is folded again, the traction path is L s A traction path (L) when passing through the first gusset s ) The shorter bubble unit contacts with the middle point of the second lambdoidal plate, and when the bubble unit is folded again, the traction path is L m . And respectively superposing the two traction paths at the same point, wherein the lengths of the traction paths of all points on the same circumferential surface of the membrane bubble are completely consistent when the membrane bubble reaches a fully folded state from a fully inflated state through the compensation action of the second herringbone plate after passing through the first herringbone plate and the second herringbone plate.
According to the film winding method based on traction path compensation, in the traction process of the traction roller, the film bubble sequentially passes through the first herringbone plates and the second herringbone plates which are mutually perpendicular, when the film bubble passes through the first herringbone plates, the traction paths of all points on the same circumference of the film bubble are unequal, and the traction paths of all points on the same circumference of the film bubble are compensated through the perpendicular arrangement of the second herringbone plates, so that the same traction path is finally obtained.
The compensation process of the second herringbone plate to the traction path of each point on the same circumference of the membrane bubble specifically comprises the following steps: when the film bubble passes through the first herringbone plate, each point on the same circumference of the film bubble is asynchronous with the contact of the first herringbone plate, and cooling is carried out before cooling; when the film bubble passes through the second herringbone plate, as the second herringbone plate is perpendicular to the first herringbone plate, the sum of the traction path length of the second herringbone plate and the traction path length of the first herringbone plate is equal to each point on the same circumference of the film bubble, and the film bubble passes through the first herringbone plate and the second herringbone plate to finally obtain the same cooling condition. In the process, as the second herringbone plate is perpendicular to the first herringbone plate, the second herringbone plate plays a role in compensating the traction paths of all points on the same circumference of the film bubble, so that when the film bubble passes through the second herringbone plate from the outlet of the die head, the traction paths of all points on the same circumference of the film bubble are identical due to path compensation, the cooling condition is identical, and film folds caused by different traction paths and different cooling conditions can be effectively avoided.
The membrane bubble is in an inflation state after passing through the first lambdoidal plate. That is, the film bubble is cooled for the first time by the first chevron plate, is not folded directly into a flat shape and sent out, but is inflated again into a cylindrical shape, and is cooled for the second time by the second chevron plate and then folded into a flat shape and sent out.
As described above, the present invention can be better realized, and the above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; all equivalent changes and modifications are intended to be covered by the scope of the appended claims.
Claims (7)
1. The film rolling method based on traction path compensation is characterized in that in the traction process, a film bubble sequentially passes through a first herringbone plate and a second herringbone plate which are mutually and vertically arranged, when the film bubble passes through the first herringbone plate, the traction paths of all points on the same circumference of the film bubble are unequal, and the traction paths of all points on the same circumference of the film bubble are compensated through the vertical arrangement of the second herringbone plate, so that the same traction path is finally obtained;
the first herringbone plate comprises four first guide plates and two first guide shafts, the two first guide shafts are respectively arranged on two sides of the membrane bubble, the upper side and the lower side of each first guide shaft are respectively provided with one first guide plate, and the four guide plates are arranged in an X shape;
the second herringbone plate comprises two second guide plates and two second guide shafts, the two second guide shafts are respectively arranged on two sides of the membrane bubble, one second guide plate is arranged on the lower side of each second guide shaft, and the two guide plates are in an inverted V shape;
the gap between the two first guide shafts in the first herringbone plate is slightly larger than the gap between the two second guide shafts in the second herringbone plate, and air in the tubular membrane bubble below the first herringbone plate can pass through the gap between the two first guide shafts, so that the membrane bubble folded by the two first guide shafts is still in an inflation state.
2. The film winding method based on traction path compensation according to claim 1, wherein the compensation process of the traction path of each point on the same circumference of the film bubble by the second chevron plate is specifically as follows: when the film bubble passes through the first herringbone plate, each point on the same circumference of the film bubble is asynchronous with the contact of the first herringbone plate, and cooling is carried out before cooling; when the film bubble passes through the second herringbone plate, as the second herringbone plate is perpendicular to the first herringbone plate, the sum of the traction path length of the second herringbone plate and the traction path length of the first herringbone plate is equal to each point on the same circumference of the film bubble, and the film bubble passes through the first herringbone plate and the second herringbone plate to finally obtain the same cooling condition.
3. The film winding method based on traction path compensation according to claim 1, wherein the film bubble is in a blown state before and after passing through the first gusset.
4. The film winding device based on traction path compensation is characterized by comprising a die head, a first herringbone plate, a second herringbone plate and a traction roller, wherein the die head, the first herringbone plate and the second herringbone plate are sequentially arranged from bottom to top according to the conveying direction of a film bubble;
the first herringbone plate comprises four first guide plates and two first guide shafts, the two first guide shafts are respectively arranged on two sides of the membrane bubble, the upper side and the lower side of each first guide shaft are respectively provided with one first guide plate, and the four guide plates are arranged in an X shape;
the second herringbone plate comprises two second guide plates and two second guide shafts, the two second guide shafts are respectively arranged on two sides of the membrane bubble, one second guide plate is arranged on the lower side of each second guide shaft, and the two guide plates are in an inverted V shape;
the gap between the two first guide shafts in the first herringbone plate is slightly larger than the gap between the two second guide shafts in the second herringbone plate, and air in the tubular membrane bubble below the first herringbone plate can pass through the gap between the two first guide shafts, so that the membrane bubble folded by the two first guide shafts is still in an inflation state.
5. The film winding device based on traction path compensation according to claim 4, wherein the two first guide shafts are arranged in parallel, the film bubble is folded when passing through a gap between the two first guide shafts, and the folding direction of the first gusset on the film bubble is parallel to the axial direction of the first guide shafts.
6. The film winding device based on traction path compensation according to claim 4, wherein the two second guide shafts are arranged in parallel, the film bubble is folded when passing through a gap between the two second guide shafts, and the folding direction of the second chevron plate on the film bubble is parallel to the axis direction of the second guide shafts.
7. The film take-up device based on drag path compensation according to claim 4, wherein the distance between the second guide shaft and the die outlet is the drag path of the film bubble.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711335381.9A CN108082990B (en) | 2017-12-14 | 2017-12-14 | Film winding method and device based on traction path compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711335381.9A CN108082990B (en) | 2017-12-14 | 2017-12-14 | Film winding method and device based on traction path compensation |
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| Publication Number | Publication Date |
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| CN108082990A CN108082990A (en) | 2018-05-29 |
| CN108082990B true CN108082990B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711335381.9A Active CN108082990B (en) | 2017-12-14 | 2017-12-14 | Film winding method and device based on traction path compensation |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4170624A (en) * | 1973-04-09 | 1979-10-09 | General Electric Company | Blown tube collapse frame assembly |
| EP0056120A2 (en) * | 1981-01-14 | 1982-07-21 | BASF Aktiengesellschaft | Method and apparatus for producing thermoplastic tubular films |
| CN1049311A (en) * | 1989-07-28 | 1991-02-20 | W·R康格雷氏公司 | The double bubble process of preparation strong, thin films |
| US5082616A (en) * | 1990-10-25 | 1992-01-21 | Edison Polymer Innovation Corp. | Film blowing process |
| DE4202450A1 (en) * | 1991-11-21 | 1993-05-27 | Windmoeller & Hoelscher | Extruded plastics film tube - is shaped into an oval before folding flat with cooling to prevent material damage |
| JP2012162026A (en) * | 2011-02-08 | 2012-08-30 | Dainippon Printing Co Ltd | Method of manufacturing inflation film |
| CN203141844U (en) * | 2013-03-13 | 2013-08-21 | 上海博锐斯新材料有限公司 | Transverse stretching mechanism for preparing thermoplastic polyurethane elastomer film |
| CN207827499U (en) * | 2017-12-14 | 2018-09-07 | 华南理工大学 | Film take-up based on traction path compensation |
-
2017
- 2017-12-14 CN CN201711335381.9A patent/CN108082990B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4170624A (en) * | 1973-04-09 | 1979-10-09 | General Electric Company | Blown tube collapse frame assembly |
| EP0056120A2 (en) * | 1981-01-14 | 1982-07-21 | BASF Aktiengesellschaft | Method and apparatus for producing thermoplastic tubular films |
| CN1049311A (en) * | 1989-07-28 | 1991-02-20 | W·R康格雷氏公司 | The double bubble process of preparation strong, thin films |
| US5082616A (en) * | 1990-10-25 | 1992-01-21 | Edison Polymer Innovation Corp. | Film blowing process |
| DE4202450A1 (en) * | 1991-11-21 | 1993-05-27 | Windmoeller & Hoelscher | Extruded plastics film tube - is shaped into an oval before folding flat with cooling to prevent material damage |
| JP2012162026A (en) * | 2011-02-08 | 2012-08-30 | Dainippon Printing Co Ltd | Method of manufacturing inflation film |
| CN203141844U (en) * | 2013-03-13 | 2013-08-21 | 上海博锐斯新材料有限公司 | Transverse stretching mechanism for preparing thermoplastic polyurethane elastomer film |
| CN207827499U (en) * | 2017-12-14 | 2018-09-07 | 华南理工大学 | Film take-up based on traction path compensation |
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| Publication number | Publication date |
|---|---|
| CN108082990A (en) | 2018-05-29 |
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