CN110027151B - Plastic film casting device - Google Patents
Plastic film casting device Download PDFInfo
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- CN110027151B CN110027151B CN201910468006.4A CN201910468006A CN110027151B CN 110027151 B CN110027151 B CN 110027151B CN 201910468006 A CN201910468006 A CN 201910468006A CN 110027151 B CN110027151 B CN 110027151B
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- roller
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- shell
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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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
- B29C41/26—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length by depositing flowable material on a rotating drum
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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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/46—Heating or cooling
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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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/52—Measuring, controlling or regulating
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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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed articles
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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)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the field of film manufacturing, and particularly discloses a plastic film casting device which comprises a machine head, an air knife, a cooling roller, a peeling roller, a traction roller and a winding roller, wherein the machine head, the air knife, the cooling roller, the peeling roller, the traction roller and the winding roller are arranged on a rack; the outer roller can rotate, a plurality of stirring units are evenly distributed in the axial direction of the outer roller, and the stirring units are located in the closed cavity. This scheme has solved among the prior art that the chill roll surface difference in temperature is great through stirring unit and pivoted outer roller, and film cooling is inhomogeneous, causes the poor problem of film quality.
Description
Technical Field
The invention relates to the field of film manufacturing, in particular to a plastic film casting device.
Background
Along with the progress of human science and technology, plastic film uses more and more extensively, and the demand of film is bigger and bigger, and the production of film can adopt the shaping of film curtain coating device among the prior art, and when adopting the device shaping, the film forming process is in proper order: the method comprises the steps of film casting molding, cooling, thickness detection, edge cutting treatment, corona treatment and final winding molding, wherein a cooling roller is crucial to the molding condition of a film in the molding process.
In the prior art, the surface of a cooling roller is divided into a working area and an edge area, in the process of casting a film, plastic in a molten state is extruded from a machine head and poured into the working area on the surface of the cooling roller, the plastic is rapidly cooled to form the film, and the cooling roller is cooled by cooling water. Be equipped with the cavity in the chill roll, the both ends of cavity are connected with inlet tube and outlet pipe respectively, and the cooling water gets into the cavity from the inlet tube and discharges away from the outlet pipe, and the in-process that flows to the outlet pipe at the cavity at the cooling water is because constantly absorb the heat and heat up gradually, and then leads to being close to the outlet pipe cooling water more poor to the cooling effect of chill roll, makes the both ends difference in temperature on chill roll surface great to influence the quality of curtain coating film quench filming.
In addition, the cooling liquid flows in the cavity under the action of external force, along with the increase of the use time of the cooling roller, the attached impurities on the inner wall of the cavity are thicker and thicker, and the continuously thickened impurities reduce the heat exchange speed between the cooling liquid and the surface of the cooling roller, so that the cooling efficiency of the cooling liquid is reduced.
Disclosure of Invention
The invention aims to provide a plastic film casting device to solve the problems that the surface temperature difference of a cooling roller is large, and the film is cooled unevenly in the prior art, so that the film quality is poor.
In order to achieve the above object, the basic scheme of the invention is as follows:
the plastic film casting device comprises a machine head, an air knife, a cooling roller, a peeling roller, a traction roller and a winding roller which are arranged on a rack, wherein the cooling roller comprises an inner roller and an outer roller, the inner roller is connected with the outer roller in a sleeved mode, at least one of the inner surface of the outer roller and the outer surface of the inner roller is provided with a groove, the position of the groove after the inner roller and the outer roller are connected in a sleeved mode forms a closed cavity, the position of the groove after the inner roller and the outer roller are connected in a sleeved mode forms the closed cavity, an inlet channel for cooling liquid to enter the closed cavity is formed in the inner roller, the end portion of the closed cavity is connected with at least one outflow channel formed in the inner roller and the outer roller, and the cooling liquid flows in the closed; the outer roller can rotate, a plurality of stirring units are evenly distributed in the axial direction of the outer roller, and the stirring units are located in the closed cavity.
The basic principle of the scheme is as follows: after the molten plastic is extruded from a machine head, the molten plastic is tightly adhered to a cooling roller under the action of an air knife to be formed into a film, the film is cooled and shaped through the cooling roller, the shaped film is stripped from the cooling roller under the drive of a stripping roller, and then the film enters a take-up roller under the drive of a traction roller to be taken up. In the process that the film is cooled on the cooling roller, the outer roller of the cooling roller rotates and drives the stirring device on the cooling roller to continuously stir the cooling liquid in the closed cavity, so that the temperature of the cooling liquid in the closed cavity is uniform, and the uniformity of the surface temperature of the outer roller is ensured.
Compare the beneficial effect in prior art:
first, need the pivoted power to drive the rotation of stirring unit with the help of outer roller itself to reach and carry out the purpose of stirring to the coolant liquid, compare in prior art to the lack stirring of coolant liquid and compare, the closed intracavity cooling liquid temperature after the stirring is more even, is favorable to the temperature uniformity on outer roller surface, further is favorable to film cooling design in-process refrigerated homogeneity, has improved the quality of film relatively.
Secondly, the cooling liquid in the closed cavity is stirred by the stirring unit, impurities contained in the cooling liquid are difficult to attach to the inner wall corresponding to the closed cavity, and compared with the phenomenon that the impurities attach to the inner wall more and more thickly in the prior art, the scheme reduces the probability that the impurities attach to the cooling roller in the cooling liquid and improves the cooling effect of the cooling liquid; on the other hand, the situation that the cleaning is difficult to treat the impurities in the cooling roller in the prior art is avoided.
Thirdly, a plurality of stirring units are axially distributed on the outer roller, the contact area between the whole formed by the outer roller and the stirring units and the cooling liquid is increased due to the existence of the stirring units, on one hand, the contact area is increased, and the stirring units are positioned in a closed cavity filled with the cooling liquid, so that the cooling liquid far away from the inner surface of the outer roller in the closed cavity can still transmit low temperature to the outer roller through the stirring units, and the utilization rate of the cooling liquid is increased; on the other hand, the increase of the contact area also increases the speed of heat exchange, which is beneficial to the cooling liquid to transfer the temperature to the outer surface of the outer roller more quickly.
Fourthly, the stirring unit in this scheme rotates with the help of the original rotation power of outer roller, under the prerequisite that makes the coolant liquid stirring even, does not need extra power to therefore improved the utilization ratio of the energy.
Further, the entry port that gets into passageway and closed chamber intercommunication is located the central cross-section of interior roller, two tip in closed chamber all are equipped with the outflow passageway, the quantity of entry port and outflow passageway is a plurality of, a plurality of the circumference equipartition of chill roll is all followed to entry port and outflow passageway.
The cooling roller has the beneficial effects that the inlet channel is positioned on the central section of the inner roller, and the outlet channels are arranged at the two ends of the closed cavity, so that the cooling liquid enters from the central position of the closed cavity and flows out from the two ends of the closed cavity.
Further, the stirring unit comprises a plurality of stirring blades which are uniformly distributed along the circumferential direction of the inner surface of the outer roller.
The cooling device has the beneficial effects that each stirring unit comprises a plurality of circumferential stirring blades, so that the contact area between the stirring blades and the cooling liquid is further increased, and the utilization rate of the cooling liquid and the speed of cold-heat exchange between the cooling liquid and the outer roller are further improved.
Further, the plastic film casting device also comprises a water pump for providing cooling liquid for the cooling roller, the water pump comprises a driving unit and a pump shell, an impeller is arranged in the pump shell, the driving unit drives the impeller to rotate, a liquid suction inlet and a liquid discharge outlet are arranged on the pump shell, the liquid discharge outlet is communicated with the inlet channel through a pipeline, and the driving unit can also drive the outer roller to rotate.
The film cooling device has the beneficial effects that the driving unit drives the water pump and the outer roller of the cooling roller to rotate simultaneously, so that the cooling roller starts to rotate to drive the film to be cooled and shaped while the water pump provides cooling liquid for the cooling roller, and the film forming device is beneficial to controlling the film forming process.
Further, the plastic film casting device also comprises an air supply unit for supplying air to the air knife, the air supply unit comprises a shell, a first blade and a second blade, a partition plate is arranged in the shell and divides the shell into a first cavity and a second cavity, the first blade is positioned in the first cavity, the second blade is positioned in the second cavity of the shell, and the first blade and the second blade rotate coaxially; the upper part of the shell where the first cavity is located is provided with a water inlet, the lower part of the shell where the first cavity is located is provided with a water outlet, and the water inlet is communicated with the outflow channel through a pipeline; the shell where the second cavity is located is provided with a wind power suction inlet and a wind power discharge outlet, the second blade is eccentrically located in the second cavity, and the shell and the second blade form an air pump; the air knife is provided with a blowhole, and the wind power outlet is communicated with the blowhole.
The working principle is that after flowing out from the outflow channel, the cooling liquid enters the first cavity through the pipeline and the water inlet of the shell, the cooling liquid continuously falls on the first blade to force the first blade to continuously rotate, the first blade is coaxially connected with the second blade, so that the second blade also rotates, the second blade is eccentrically positioned in the second cavity, so that the shell and the second blade form a centrifugal air pump, and the air pump enters wind power into a wind hole of the wind knife through the wind power outlet and the pipeline to finally form the wind power of the wind knife.
Has the advantages that: the first blade and the second blade are driven to rotate by the cooling liquid discharged from the closed cavity, and finally wind power supply to the air knife is formed, so that the recycling of the cooling liquid is realized, and the resource saving is facilitated.
Furthermore, the water outlet is communicated with a liquid suction inlet of the water pump through a water outlet pipeline.
The cooling liquid passes through the first blade and then falls to the water outlet, and then returns to the liquid suction inlet of the water pump from the water outlet through the water outlet pipeline. In this in-process, when the first blade was hit in the cooling liquid whereabouts, the area of contact increase of cooling liquid and air, first blade and casing, the contact time extension for the cooling liquid realizes the effect of cooling to self.
Further, the driving unit is a motor, an output shaft of the motor drives the impeller to rotate through a coupler arranged on the motor, and the output shaft of the motor is in transmission connection with the outer roller through a belt.
The belt type automatic transmission device has the beneficial effects that the belt type automatic transmission device is connected through the belt in a transmission manner, so that the connection is simple and the maintenance is convenient.
Further, the plastic film casting device also comprises a thickness measuring unit, and the thickness measuring unit is positioned between the stripping roller and the traction roller.
The thickness measuring unit has the beneficial effects that the thickness of the cooled and formed film is measured through the thickness measuring unit, so that the thickness and the thickness of the film can be conveniently controlled.
Further, the plastic film casting device also comprises a trimming unit, and the trimming unit is positioned between the traction roller and the winding roller.
The edge cutting unit has the beneficial effects that the edge cutting unit cuts and removes the edge materials which are easy to cause quality problems on two sides of the film, so that the overall quality of the finished film roll is further ensured.
Further, the plastic film casting device further comprises a corona unit, and the corona unit is located between the trimming unit and the winding roller.
The corona unit is used for processing the surface of the film to increase the adhesive force of the surface of the film and prepare for printing the subsequent film.
Drawings
FIG. 1 is a schematic diagram of a forward structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing a forward structure of a connection relationship among the machine head, the air knife, the cooling roller, the water pump and the air supply unit in the embodiment of the invention in FIG. 1;
fig. 3 is a plan view showing a connection relationship among the cooling roll, the water pump and the air supply unit according to the embodiment of the present invention in fig. 1.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a frame 1, an air knife 2, a machine head 3, a cooling roller 4, a stripping roller 5, a thickness measuring unit 6, a traction roller 7, a trimming unit 8, a corona roller 9, a take-up roller 10, a water pump 11, an air supply unit 12, an inner roller 13, an outer roller 14, a groove 131, an inlet channel 132, an inlet port 1321, an outlet channel 133, a stirring unit 15, a stirring blade 151, a motor 16, a pump shell 17, an impeller 18, a coupler 19, a liquid suction port 171, a liquid discharge port 172, a belt 20, a shell 21, a first blade 22, a second blade 23, a partition plate 24, a first chamber 25, a second chamber 26, a water inlet 211, a water outlet pipeline 27, a wind power discharge port 212 and a blowing hole 28.
The embodiment is substantially as shown in fig. 1 to 3:
referring to fig. 1, the plastic film casting apparatus sequentially comprises, from left to right, an air knife 2, a machine head 3, a cooling roller 4, a peeling roller 5, a thickness measuring unit 6, a traction roller 7, a trimming unit 8, a corona unit and a winding roller 10 which are mounted on a frame 1, wherein the corona unit is a corona roller 9; referring to fig. 2 and 3, the casting apparatus for plastic film further includes a water pump 11 for supplying a cooling liquid, which is water, to the cooling roll 4 and an air supply unit 12 for supplying air to the air knife 2.
With reference to fig. 2 and 3, the cooling roller 4 includes an inner roller 13 and an outer roller 14, the inner roller 13 is connected to the outer roller 14 in a sleeved manner, a groove 131 is formed on the outer surface of the inner roller 13, a closed cavity is formed at the position of the groove 131 after the inner roller 13 and the outer roller 14 are connected in a sleeved manner, an inlet passage 132 for cooling liquid to enter the closed cavity is formed on the inner roller 13, an inlet port 1321 of the inlet passage 132, which is communicated with the closed cavity, is located on the central cross section of the inner roller 13, two end portions (upper and lower end portions in fig. 3) of the closed cavity are connected to a plurality of outflow passages 133 formed on the inner roller 13, the inlet port 1321 and the outflow passages 133 are uniformly distributed along the circumferential direction of the inner roller 13, and the cooling liquid flows in; outer roller 14 can rotate, and outer roller 14 axial equipartition has a plurality of stirring unit 15, and stirring unit 15 is located and seals the intracavity, and stirring unit 15 includes a plurality of stirring vane 151, and stirring vane 151 is along outer roller 14's internal surface circumference evenly distributed, and stirring vane 151 fixed connection is on outer roller 14's internal surface.
Referring to fig. 2 and 3, the water pump 11 is a centrifugal water pump 11, the water pump 11 includes a motor 16 and a pump housing 17, the impeller 18 is rotatably connected in the pump housing 17, an output shaft of the motor 16 is connected to the impeller 18 through a coupling 19, the pump housing 17 is provided with a liquid suction port 171 and a liquid discharge port 172, the liquid discharge port 172 is communicated with the inlet channel 132 through a pipeline, the motor 16 can also drive the outer roller 14 to rotate through a belt 20, and the liquid suction port 171 is connected to a source of the coolant.
The air supply unit 12 comprises a shell 21, a first blade 22 and a second blade 23, a partition plate 24 is integrally formed in the shell 21, the partition plate 24 divides the shell 21 into a first cavity 25 and a second cavity 26, the first blade 22 is positioned in the first cavity 25, the second blade 23 is positioned in the second cavity 26 of the shell 21, and the first blade 22 and the second blade 23 coaxially rotate; the upper part of the shell 21 where the first chamber 25 is located is provided with a water inlet 211, the lower part of the shell 21 where the first chamber 25 is located is provided with a water outlet, the water inlet 211 is communicated with the outflow channel 133 through a pipeline, and the water outlet is communicated with the liquid suction port 171 of the water pump 11 through a water outlet pipeline 27; a wind power suction inlet and a wind power discharge outlet 212 are arranged on the shell 21 where the second chamber 26 is located, the second blade 23 is eccentrically located in the second chamber 26, and the shell 21 and the second blade 23 form a centrifugal air pump; the air knife 2 is provided with an air blowing hole 28, and the wind power outlet 212 is communicated with the air blowing hole 28 through a pipeline.
The specific implementation process is as follows:
when a plastic film is formed, after molten plastic is extruded from a machine head 3, the molten plastic is tightly attached to a cooling roller 4 under the action of an air knife 2 to be formed into a film, the film is cooled and shaped through the cooling roller 4, the shaped film is stripped from the cooling roller 4 under the drive of a stripping roller 5, and then the film sequentially enters a thickness measuring unit 6 under the drive of a traction roller 7 to be measured in thickness, is cut off by a trimming unit 8, is subjected to corona treatment by a corona roller 9, and finally enters a take-up roller 10 to be taken up. In the process of cooling the film on the cooling roller 4, the motor 16 drives the outer roller 14 of the cooling roller 4 to rotate continuously (the inner roller 13 is fixedly installed on the frame 1), and the outer roller 14 rotates to drive the stirring blades 151 on the cooling roller 4 to stir the cooling liquid in the closed cavity continuously, so that the temperature of the cooling liquid in the closed cavity is uniform, and the uniformity of the surface temperature of the outer roller 14 is further ensured.
The motor 16 drives the cooling roller 4 to rotate and simultaneously drives the impeller 18 of the water pump 11 to rotate, the water pump 11 works, then the cooling liquid with lower temperature sequentially passes through the liquid suction port 171, the inner cavity of the pump shell 17, the liquid discharge port 172 and finally enters the inlet channel 132 of the inner roller 13 through a pipeline under the action of the centrifugal force of the water pump 11, the cooling liquid flows through the closed cavity after entering from the inlet channel 132 and takes away the heat of the outer roller 14, the temperature of the cooling liquid is relatively raised, then the cooling liquid with higher temperature enters the water inlet 211 from the outlet channel 133 and the pipeline, the cooling liquid entering the water inlet 211 continuously falls on the first blade 22 to force the first blade 22 to continuously rotate, the first blade 22 is coaxially connected with the second blade 23, so that the second blade 23 also rotates, the second blade 23 is eccentrically positioned in the second cavity 26, the shell 21 and the second blade 23 form a centrifugal air pump, the wind pump enters wind power into the wind blowing hole 28 of the wind knife 2 through the wind power outlet 212 and the pipeline, and finally forms the wind power of the wind knife 2.
When the cooling liquid flows in the closed cavity, the stirring blades 151 continuously stir the cooling liquid, so that the temperature of the cooling liquid in the closed cavity is more uniform, the temperature consistency of the surface of the outer roller 14 is facilitated, the cooling uniformity in the film cooling and shaping process is further facilitated, and the quality of the film is relatively improved.
The stirring blades 151 stir the cooling liquid in the closed cavity, and impurities contained in the cooling liquid are difficult to attach to the inner wall corresponding to the closed cavity, so that on one hand, the probability that the impurities in the cooling liquid are attached to the cooling roller 4 is reduced, and the cooling effect of the cooling liquid is improved; on the other hand, the situation that the cleaning is difficult for processing the impurities in the cooling roller 4 in the prior art is avoided.
In addition, the stirring blades 151 are fixedly connected to the outer roller 14, so that the contact area between the whole formed by the outer roller 14 and the stirring blades 151 and the cooling liquid is increased, on one hand, the contact area is increased, and in addition, the stirring blades 151 are positioned in a closed cavity filled with the cooling liquid, so that the cooling liquid far away from the inner surface of the outer roller 14 in the closed cavity can still transmit low temperature to the outer roller 14 through the stirring blades 151, and the utilization rate of the cooling liquid is increased; on the other hand, the increase of the contact area also increases the speed of heat exchange, which is beneficial to the cooling liquid to transfer the temperature to the outer surface of the outer roller 14 more quickly, and is further beneficial to the cooling and shaping of the film.
The inlet channel 132 is located on the central section of the inner roll 13, and the outlet channels 133 are provided at both ends of the closed chamber, so that the cooling liquid enters from the central position of the closed chamber and flows out from both ends of the closed chamber, and the flow path of the cooling liquid in the closed chamber is relatively shortened, so that the temperature difference between the cooling liquid entering and exiting the closed chamber is reduced, which is more advantageous for the temperature uniformity of the surface of the outer roll 14.
The motor 16 drives the water pump 11 and the outer roller 14 to rotate at the same time, the cooling liquid discharged from the closed cavity drives the first blade 22 and the second blade 23 to rotate, and finally, wind power supply to the wind knife 2 is formed, recycling of the cooling liquid and multiple utilization of energy output by the motor 16 are achieved, and resource saving is facilitated.
In addition, the coolant passes through the first blade 22, falls to the water outlet, and returns from the water outlet to the liquid suction port 171 of the water pump 11 again through the water outlet pipe 27. In this process, when the coolant falls and hits first blade 22, the contact area of coolant and air, first blade 22 and casing 21 increases, and the contact time extension for the effect of cooling is realized to self to the coolant.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. Plastic film curtain coating device, including aircraft nose, air knife, chill roll, peel roller, carry over pinch rolls and the wind-up roll of installing in the frame, its characterized in that: the cooling roller comprises an inner roller and an outer roller, the inner roller is connected with the outer roller in a sleeved mode, at least one of the inner surface of the outer roller and the outer surface of the inner roller is provided with a groove, a closed cavity is formed in the position of the groove after the inner roller and the outer roller are connected in a sleeved mode, the inner roller is provided with an inlet channel through which cooling liquid enters the closed cavity, the end portion of the closed cavity is connected with at least one outflow channel on the inner roller and the outer roller, and the cooling liquid flows in the closed cavity through the inlet channel and the outflow channel; the outer roller can rotate, a plurality of stirring units are uniformly distributed in the axial direction of the outer roller and are positioned in the closed cavity, each stirring unit comprises a plurality of stirring blades, and the stirring blades are uniformly distributed along the circumferential direction of the inner surface of the outer roller;
the inlet channel is communicated with the closed cavity, the inlet channel is positioned on the central cross section of the inner roller, the two end parts of the closed cavity are respectively provided with an outflow channel, the number of the inlet channels and the number of the outflow channels are respectively a plurality, and the inlet channels and the outflow channels are uniformly distributed along the circumferential direction of the cooling roller;
the plastic film casting device also comprises a water pump for providing cooling liquid for the cooling roller, the water pump comprises a driving unit and a pump shell, an impeller is arranged in the pump shell, the driving unit drives the impeller to rotate, a liquid suction inlet and a liquid discharge outlet are arranged on the pump shell, the liquid discharge outlet is communicated with the inlet channel through a pipeline, and the driving unit can also drive the outer roller to rotate;
the plastic film casting device further comprises an air supply unit for supplying air to the air knife, the air supply unit comprises a shell, a first blade and a second blade, a partition plate is arranged in the shell and divides the shell into a first cavity and a second cavity, the first blade is located in the first cavity, the second blade is located in the second cavity of the shell, and the first blade and the second blade rotate coaxially;
the upper part of the shell where the first cavity is located is provided with a water inlet, the lower part of the shell where the first cavity is located is provided with a water outlet, and the water inlet is communicated with the outflow channel through a pipeline;
the shell where the second cavity is located is provided with a wind power suction inlet and a wind power discharge outlet, the second blade is eccentrically located in the second cavity, and the shell and the second blade form an air pump; the air knife is provided with a blowhole, and the wind power outlet is communicated with the blowhole.
2. A plastic film casting apparatus according to claim 1, wherein: the water outlet is communicated with a liquid suction inlet of the water pump through a water outlet pipeline.
3. A plastic film casting apparatus according to claim 1, wherein: the driving unit is a motor, an output shaft of the motor drives the impeller to rotate through a coupler, and the output shaft of the motor is in transmission connection with the outer roller through a belt.
4. A casting apparatus of a plastic film according to any one of claims 1 to 3, wherein: the plastic film casting device further comprises a thickness measuring unit, and the thickness measuring unit is located between the stripping roller and the traction roller.
5. A plastic film casting apparatus according to claim 4, wherein: the plastic film casting device further comprises a trimming unit, and the trimming unit is located between the traction roller and the winding roller.
6. A plastic film casting apparatus according to claim 5, wherein: the plastic film casting device further comprises a corona unit, and the corona unit is located between the trimming unit and the winding roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910468006.4A CN110027151B (en) | 2019-05-31 | 2019-05-31 | Plastic film casting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910468006.4A CN110027151B (en) | 2019-05-31 | 2019-05-31 | Plastic film casting device |
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| CN110027151A CN110027151A (en) | 2019-07-19 |
| CN110027151B true CN110027151B (en) | 2021-04-16 |
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| CN110789038B (en) * | 2019-11-13 | 2022-02-01 | 科及士(浙江)新材料科技有限公司 | TPU film curtain coating extrusion device |
| CN112341831A (en) * | 2020-11-24 | 2021-02-09 | 北京路德永泰环保科技有限公司 | Asphalt regenerant and preparation method thereof |
| CN113681805B (en) * | 2021-08-25 | 2023-04-14 | 郴州市银河工具有限公司 | Film production is with cast piece shaping cooling device |
| CN113681806A (en) * | 2021-08-25 | 2021-11-23 | 山东劳动职业技术学院（山东劳动技师学院） | Main cold roll mechanism of biaxial stretching film production line |
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| JP3448078B2 (en) * | 1993-03-17 | 2003-09-16 | 三菱重工業株式会社 | Extrusion molding equipment |
| DE10236153A1 (en) * | 2002-08-07 | 2004-02-19 | Klöckner Pentaplast GmbH & Co. KG | A film with an antistatic coating including a synthetic inorganic silicate layer and an electrically conductive polymer layer obtained from a nanosol useful for packaging electronic components |
| CN201140494Y (en) * | 2007-07-31 | 2008-10-29 | 青岛海宇塑胶机械有限公司 | Casting machine |
| CN201151174Y (en) * | 2007-09-04 | 2008-11-19 | 张春华 | Improved structure of casting roller |
| CN202517639U (en) * | 2012-03-21 | 2012-11-07 | 浙江佳阳塑胶新材料有限公司 | Film casting machine |
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| CN204658914U (en) * | 2015-06-01 | 2015-09-23 | 嘉善恒宇塑胶有限公司 | A kind of cooling body of plastic extrusion curtain coating film unit |
| WO2017118471A1 (en) * | 2016-01-04 | 2017-07-13 | Globra Gmbh | Device and method for cooling film material |
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| CN108656416B (en) * | 2018-04-01 | 2021-01-08 | 江苏美誉虹新材料科技有限公司 | PVC membrane is with cooling processing equipment |
| CN208854899U (en) * | 2018-09-11 | 2019-05-14 | 红塔塑胶（成都）有限公司 | A kind of three-layer co-extruded BOPP biaxial tension pretreating device |
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