CN109501221B - Polypropylene is from type membrane secondary stretching device - Google Patents
Polypropylene is from type membrane secondary stretching device Download PDFInfo
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- CN109501221B CN109501221B CN201811311050.6A CN201811311050A CN109501221B CN 109501221 B CN109501221 B CN 109501221B CN 201811311050 A CN201811311050 A CN 201811311050A CN 109501221 B CN109501221 B CN 109501221B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/18—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets by squeezing between surfaces, e.g. rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/0288—Controlling heating or curing of polymers during moulding, e.g. by measuring temperatures or properties of the polymer and regulating the process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C2035/0283—Thermal pretreatment of the plastics material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention discloses a secondary stretching device for a polypropylene release film, which relates to the technical field of film production. According to the invention, through the structural arrangement of the double-drawing film system, the original film with larger width can be secondarily drawn, and the double-drawing film system has the advantages of large adjustment range, wide application range, high finished product strength, high qualification rate and wide market prospect.
Description
Technical Field
The invention relates to the technical field of film production, in particular to a secondary stretching device for a polypropylene release film.
Background
The invention relates to the field of high-grade sports equipment such as fishing rods, golf rods and the like, and the produced product is used as an auxiliary material in the production and processing process of the field and plays a critical role in the quality of the product.
With the rapid development of new materials in China, the domestic capability and the domestic demand of carbon fibers are rapidly increased, the carbon fibers have the excellent characteristics of soft outside and rigid inside, lighter weight than metal aluminum, higher strength than steel and the like, are greatly developed in recent years, and are particularly widely applied to sports equipment.
The structure of carbon fibers is seen to consist of two-dimensional ordered crystals and pores, wherein the content, size and distribution of the pores has a large influence on the properties of the carbon fibers. When the porosity exceeds a certain ratio, the interlaminar shear strength begins to decrease. The pores are distributed mainly between the fiber bundles and at the interface between the layers. And the higher the void content, the larger the void size, and the significantly reduced the area of the interlayer interface in the laminate. When the material is stressed, it is prone to failure along the interlamination, which is also why the interlaminar shear strength is relatively sensitive to porosity. In addition, the pore is a stress concentration area, the bearing capacity is weak, and when the stress is applied, the pore is expanded to form a long crack, so that the crack is damaged. Therefore, the high-grade sports equipment made of the carbon fiber material needs a release film with higher strength and lower elongation at break in the curing process. The width of the existing secondary stretching equipment is only 1000mm, the efficiency is low, and the yield is low. The larger the width of the existing equipment is, the lower the rate of finished products can be obviously reduced, the secondary stretching equipment with larger width is not available at present, the equipment adjusting scope is small, the product index can not meet the requirement of customers within the adjustable range of the equipment, and the strength and the elongation at break of the existing common polypropylene release film can not meet the production requirement of the part of high-grade equipment.
Disclosure of Invention
The invention aims to provide a secondary stretching device for a polypropylene release film, which is used for solving the problems in the prior art and overcoming the defects that the conventional secondary stretching equipment is small in adjustment range, low in efficiency, low in yield and difficult in product performance index reaching the requirements of customers.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a secondary stretching device for a polypropylene release film, which comprises an unreeling device, a film drawing system and a reeling device, and is characterized in that: the film drawing system is composed of a plurality of rollers, is arranged on the rack and sequentially comprises a first preheating area, a second preheating area, a slow drawing area, a fast drawing area, a first shaping area, a second shaping area and a cooling area along the advancing direction of the release film, and is further connected with a heating device for heating the rollers.
Preferably, the first preheating zone is sequentially provided with three preheating rollers, and the second preheating zone is sequentially provided with two preheating rollers.
Preferably, the slow-drawing zone and the fast-drawing zone are both provided with two drawing rolls.
Preferably, the first shaping area and the second shaping area are both a shaping roller.
Preferably, the cooling zone is a cooling roll.
Preferably, the preheating roller, the stretching roller, the shaping roller and the cooling roller are all connected with a speed reducer.
Preferably, the roller has a roller surface width of 2300-2900 mm.
Preferably, the diameters of the preheating roller, the shaping roller and the cooling roller are equal to
The roll diameter of the stretching roll is 200js6 (+ -0.0145).
Preferably, an ultrasonic membrane rupture detector is arranged behind the cooling roller and is connected with a stopping device.
Preferably, the first preheating area, the slow drawing area, the fast drawing area and the cooling area are all provided with press rollers and are automatically started when the machine is stopped.
Compared with the prior art, the invention has the following beneficial technical effects:
by adopting the secondary stretching device for the polypropylene release film, the secondary stretching device can be suitable for carrying out secondary stretching on an original film with the width of about 2000mm by setting the structure and parameters of the film stretching system, and has the advantages of large adjustment range, wide application range, high strength of a produced finished product, high qualification rate, continuous production and wide market prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a secondary stretching device for a polypropylene release film according to the present invention;
in the figure: 1-speed reducer, 2-cylinder, 3-unreeling roller, 4-preheating first zone, 5-preheating second zone, 6-slow-pulling zone, 7-fast-pulling zone, 8-shaping first zone, 9-shaping second zone, 10-cooling zone, 11-chuck, 12-frame and 13-chain wheel
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a secondary stretching device for a polypropylene release film, which aims to solve the problems in the prior art, and the adjustable range of the secondary stretching device is large through the structural arrangement of a double-film stretching system, the yield and the finished product performance are obviously improved, and the requirements of customers on products are met.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The embodiment provides a secondary stretching device for a polypropylene release film, which comprises an unwinding device, a film drawing system and a winding device, as shown in fig. 1.
Wherein, unwinding device adopts two fixed stations, and two variable frequency speed governing motors control respectively, motor power: 5.5KW, the width of the roll surface of the unreeling roll 3 is 2600mm, the release film is unreeled and then passes through a film drawing system, the film drawing system is sequentially provided with a first preheating area 4, a second preheating area 5, a slow drawing area 6, a fast drawing area 7, a first shaping area 8, a second shaping area 9 and a cooling area 10, the first preheating area 4 is provided with three preheating rolls, the second preheating area 5 is provided with two preheating rolls, the slow drawing area 6 and the fast drawing area 7 are both provided with two stretching rolls, the first shaping area 8 and the second shaping area 9 are both one shaping roll, the cooling area 10 is one cooling roll, the width of the roll surface of each roll is 2300-2900mm, preferably, the width of the roll surface is 2600mm, and the two ends of each area of the roll are fixed on a frame 12, and is connected with a speed reducer 1 (with a motor) by a chain, the motor is produced by ABB company, the speed reducer 1 is a Mierda, as shown in fig. 1, the chain is also wound around a sprocket 13, the position of which is adjustable by means of the cylinder 2. The preheating roller, the stretching roller, the shaping roller and the cooling roller are all connected with a speed reducer, and the speed reducer in each preheating area, the slow drawing area, the fast drawing area, the shaping area and the cooling area is designed to be configured with the following sections:
a preheating zone: reduction ratio: 14.91 line speed Range: 9.59-95.9m/min motor power: 4kw
A slow pull region: reduction ratio: 7.74 line speed Range: 9.35-93.5m/min motor power: 7.5kw
A fast pull area: reduction ratio: 5.89 line speed Range: motor power of 12.37-123.7 m/min: 11kw
A shaping area: reduction ratio: 12.25 line speed range: motor power 3kw at 11.82-118.2m/min
A shaping area: reduction ratio: 12.25 line speed range: 11.82-118.2m/min motor power: 3kw
A cooling area: reduction ratio: 12.25 line speed range: motor power 3kw at 11.82-118.2m/min
The film drawing system is preheated to each setting area and is respectively connected with six heat conduction oil furnaces, and the six rollers are used for heating:
1. preheating a first area, wherein the heating power is 48KW, and the temperature range of the roller surface is 20-180 DEG C
2. Preheating a second area, wherein the heating power is 36KW, and the temperature range of the roller surface is 20-180 DEG C
3. A slow-drawing area with 18KW heating power and 20-180 ℃ roller surface temperature
4. A fast drawing area with 18KW heating power and 20-180 deg.C roll surface temperature
5. Shaping a first area, wherein the heating power is 18KW, and the temperature range of the roller surface is 20-180 DEG C
6. Setting the second area, heating power 18KW, roller surface temperature 20-180 deg.C
Wherein, the cooling zone utilizes a 10 ℃ water temperature control valve to feed cooling water to control the temperature of the cooling roller.
A winding device is arranged behind the cooling roller, the tension between winding and traction is controlled by an online tension sensor, the width of the film roll is 1800mm-2000mm, the diameter of the film roll is phi 650 mm: and (5) central winding. The winding adopts a 6-inch steel core: the winder adopts a movable chuck form, and the length of a steel core is 1800mm-2000 mm.
The invention can adopt electric control production, and uses Siemens programmable controller to set the unreeling speed, the stretching multiplying power and the speed ratio among each drive, when the film is drawn, the whole line runs at low speed, after the film is turned to 'automatic' control, the whole line automatically rises to the set value, the speed ratio among each drive can be adjusted, the adjusting range is 1: 1-1: 1.5, and the stretching high-low speed range is 1: 1-1: 8.
By adopting the secondary stretching device for the polypropylene release film, the original film enters a film drawing system after being unreeled, wherein the diameters of the rollers of the preheating roller, the sizing roller and the cooling roller are equal to
The diameter of the roller of the stretching roller is phi 200js6 (+ -0.0145), the roller is made of 20 steel, the surface of the roller is plated with hard chromium for polishing, the plated layer is not less than 0.1mm after being polished, the original film is preheated by the preheating roller, and after being stretched by the stretching roller, the original film is shaped, cooled and wound.
Meanwhile, an ultrasonic film breaking detector is arranged behind the cooling roller and connected with a stopping device, the preheating area 4, the slow drawing area 6, the fast drawing area 7 and the cooling area 10 are respectively provided with a compression roller, after the ultrasonic film breaking detector detects film breaking, the stopping device is automatically opened, and each compression roller is opened.
The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (4)
1. The utility model provides a polypropylene is from type membrane secondary stretching device, includes unwinding device, draws membrane system and coiling mechanism, its characterized in that: the film drawing system is composed of a plurality of rollers, is arranged on a rack, sequentially comprises a first preheating area, a second preheating area, a slow drawing area, a fast drawing area, a first shaping area, a second shaping area and a cooling area along the advancing direction of a release film, the first preheating area is sequentially provided with three preheating rollers, the second preheating area is sequentially provided with two preheating rollers, the slow drawing area and the fast drawing area are both provided with two stretching rollers, the first shaping area and the second shaping area are both one shaping roller, the cooling area is one cooling roller, the preheating rollers, the stretching rollers, the shaping rollers and the cooling rollers are all connected with speed reducers, the speed reduction ratio of the first preheating area and the second preheating area is 14.91, the linear speed is 9.59-95.9m/min, the speed reduction ratio of the slow drawing area is 7.74, the linear speed is 9.35-93.5m/min, the speed reduction ratio of the fast drawing area is 5.89, and the linear speed is 12.37-123.7m/min, the speed reduction ratio of the first shaping area and the second shaping area is 12.25, the linear speed is 11.82-118.2m/min, the speed reduction ratio of the cooling area is 12.25, the linear speed is 11.82-118.2m/min, and the film drawing system is also connected with a heating device for heating the rollers;
the width of the roller surface of the roller is 2300-2900 mm.
2. The polypropylene release film secondary stretching device according to claim 1, characterized in that: the diameters of the preheating roller, the shaping roller and the cooling roller are
The diameter of the roller of the stretching roller is
3. The polypropylene release film secondary stretching device according to claim 1, characterized in that: and an ultrasonic membrane breaking detector is arranged behind the cooling roller and is connected with a stopping device.
4. The polypropylene release film secondary stretching device according to claim 3, characterized in that: the first preheating area, the slow pulling area, the fast pulling area and the cooling area are all provided with press rollers and are automatically started when the machine is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311050.6A CN109501221B (en) | 2018-10-27 | 2018-10-27 | Polypropylene is from type membrane secondary stretching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311050.6A CN109501221B (en) | 2018-10-27 | 2018-10-27 | Polypropylene is from type membrane secondary stretching device |
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| Publication Number | Publication Date |
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| CN109501221A CN109501221A (en) | 2019-03-22 |
| CN109501221B true CN109501221B (en) | 2021-04-23 |
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| CN111976173A (en) * | 2019-05-24 | 2020-11-24 | 安徽省众望科希盟科技有限公司 | Preparation process of unidirectional stretching polytetrafluoroethylene film |
| CN114161632B (en) * | 2021-12-03 | 2022-10-28 | 连云港市金田高新材料有限公司 | Cooling device and cooling method for biaxially oriented polypropylene composite film |
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| JP4335073B2 (en) * | 2004-05-26 | 2009-09-30 | 積水化成品工業株式会社 | LAMINATED SHEET MANUFACTURING METHOD, LAMINATED SHEET, AND MOLDED ARTICLE |
| CN2747052Y (en) * | 2004-09-20 | 2005-12-21 | 南京工业职业技术学院 | Stretching apparatus for producing strengthening film |
| CN202144111U (en) * | 2011-07-25 | 2012-02-15 | 湖北富思特材料科技集团有限公司 | Longitudinal drawing machine |
| CN203198250U (en) * | 2012-06-11 | 2013-09-18 | 江苏苏力机械有限公司 | Heating and preserving device of synchronous tensile machine of ultra-wide film |
| CN202862470U (en) * | 2012-09-12 | 2013-04-10 | 上海九天塑料薄膜有限公司 | Improved longitudinally-drawing preheating system |
| CN203254650U (en) * | 2013-01-21 | 2013-10-30 | 江苏景宏新材料科技有限公司 | Bidirectional-stretched PP separation film reinforcement annealing device |
| CN104552972B (en) * | 2015-01-13 | 2017-02-22 | 浙江三星塑胶有限公司 | Two-way stretching polylactic acid membrane device |
| CN108115923A (en) * | 2017-12-14 | 2018-06-05 | 爱思开希（江苏）尖端塑料有限公司 | A kind of longitudinal stretching method and device of biaxially oriented polyester film |
| CN108146071B (en) * | 2017-12-22 | 2019-09-17 | 佛山市正道中印包装印刷有限公司 | The multi-functional two-sided extracode device of one kind and its application method |
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