CN114851517B - Hot air heat preservation film blowing method and film blowing device - Google Patents
Hot air heat preservation film blowing method and film blowing device Download PDFInfo
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- CN114851517B CN114851517B CN202210592432.0A CN202210592432A CN114851517B CN 114851517 B CN114851517 B CN 114851517B CN 202210592432 A CN202210592432 A CN 202210592432A CN 114851517 B CN114851517 B CN 114851517B
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- hot air
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- film
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- 238000010096 film blowing Methods 0.000 title claims abstract description 46
- 238000004321 preservation Methods 0.000 title claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 88
- 238000004513 sizing Methods 0.000 claims abstract description 64
- 238000007664 blowing Methods 0.000 claims abstract description 41
- 238000001125 extrusion Methods 0.000 claims abstract description 32
- 230000007704 transition Effects 0.000 claims abstract description 22
- 230000003247 decreasing effect Effects 0.000 claims abstract description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 22
- 239000006260 foam Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 12
- 238000007493 shaping process Methods 0.000 abstract description 11
- 238000001816 cooling Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 230000000704 physical effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/89—Internal treatment, e.g. by applying an internal cooling fluid stream
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/91—Heating, e.g. for cross linking
- B29C48/9105—Heating, e.g. for cross linking of hollow articles
-
- 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
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention relates to a hot air heat preservation film blowing method, which is characterized in that: when a die head of a film blowing machine blows out film bubbles, blowing hot air from the die head into the film bubbles to perform internal heat preservation on the inner surfaces of the film bubbles, and simultaneously, performing external heat preservation on the outer surfaces of the film bubbles by arranging a hot air ring and a transition heating device on a sizing ring; the extrusion temperature of the die head, the air outlet temperature of the hot air ring, the sizing heating temperature of the sizing ring by the transition heating device and the temperature of blowing hot air inside are sequentially decreased. The hot air heat preservation film blowing method can ensure that the material with higher shaping temperature can be smoothly blown under the temperature-suitable environment, and the stability of the film bubble is improved.
Description
Technical Field
The invention relates to the technical field of film blowing machines, in particular to a hot air heat preservation film blowing method and a film blowing device.
Background
At present, in the production of a film blowing machine, cold air is uniformly blown out of a film bubble through an air ring in the extrusion process, so that an extruded hot film blank is cooled and shaped. The cooling requirements of different bubble materials are different, and the setting temperature of some materials (such as PLA) is higher, generally above 200 ℃. However, in the current film blowing operation, the film bubble is in a room temperature environment after extrusion, the room temperature is greatly lower than the extrusion temperature of the film bubble, even if cold air for shaping is not added, the film bubble still encounters an environment with suddenly reduced temperature after extrusion, so that the physical properties of the film bubble after extrusion change and cannot be shaped smoothly, and the film material is unsatisfactory.
Disclosure of Invention
The invention aims to solve the problem of providing a hot air heat preservation film blowing method, which can ensure that materials with higher shaping temperature can be blown smoothly in a proper temperature environment, and improve the stability of film bubbles. The technical scheme adopted is as follows:
A hot air heat preservation film blowing method is characterized in that: when a die head of a film blowing machine blows out film bubbles, blowing hot air from the die head into the film bubbles to perform internal heat preservation on the inner surfaces of the film bubbles, and simultaneously, performing external heat preservation on the outer surfaces of the film bubbles by arranging a hot air ring and a transition heating device on a sizing ring; the extrusion temperature of the die head, the air outlet temperature of the hot air ring, the sizing heating temperature of the sizing ring by the transition heating device and the temperature of blowing hot air inside are sequentially decreased.
After the film bubble is extruded from the die head, hot air is blown out from the periphery of the extrusion port to the film bubble by the hot air ring, and the air outlet temperature of the hot air ring is slightly lower than the extrusion temperature of the die head, so that the material is not in an environment with suddenly reduced temperature after being extruded from the die head, and the physical property of the material is still maintained; when the film bubble reaches the sizing ring, the transition heating device heats the sizing ring, so that the sizing ring provides a buffer cooling space for the film bubble, the outer side surface of the film bubble is tightly attached to the inner side surface of the sizing ring, the film bubble is in a temperature gradually-reduced environment in the sizing ring, and the hot air ring and the transition heating device jointly form the outer heat preservation of the film bubble between extrusion and stable bubble; however, the external heat preservation alone cannot achieve a better shaping effect, because the distance from the film bubble extrusion to the film bubble complete shaping is generally longer, at the rear part of the film bubble close to the complete shaping, namely, the film bubble between the sizing ring and the bubble stabilizing frame, the temperature in the film bubble is rapidly reduced, so that the inner surface of the film bubble contracts to influence the shaping effect, in order to solve the problem which is easily ignored but is very important, hot air is blown into the film bubble, the film bubble is internally preserved, the temperature of the internally blown hot air is set to be lower than the sizing heating temperature, and as the film bubble is continuously extruded, the temperature of the hot air is gradually reduced along the film blowing direction, so that the film bubble can be gradually cooled to room temperature from the extrusion temperature and finally cooled and shaped, and the film bubble is in a transitional cooling state in the extrusion process.
As a preferable scheme of the invention, the hot air ring is arranged at the extrusion port of the die head of the film blowing machine, and the air outlets of the hot air ring are uniformly arranged along the periphery of the extrusion port of the die head; the air inlet of the hot air ring is connected with an external hot air device. The external hot air device conveys hot air to the hot air ring, so that the hot air ring uniformly blows out the hot air around the extrusion port of the die head.
As a further preferable scheme of the invention, the transition heating device is arranged on the peripheral surface of the sizing ring and comprises at least three heating rings, and the average temperature difference between two adjacent heating rings is lower than 50 ℃. At least three heating rings are adopted, so that the film bubble is ensured to have enough cooling and buffering stages in the sizing ring; meanwhile, the average temperature difference between two adjacent heating rings is also lower than 50 ℃, so that the cooling temperature of the film bubble in the sizing ring can be in a small-amplitude continuous gradual-decreasing process along the film blowing direction, and the physical property of the material is prevented from being changed due to overlarge cooling temperature decrease.
As a further preferable scheme of the invention, when the film bubble is blown out from the die head of the film blowing machine, the internal heat blowing pipe is adopted to blow hot air from the die head to the interior of the film bubble, and the air inlet of the internal heat blowing pipe is connected with the internal hot air device.
As a still further preferred scheme of the invention, the air outlet of the internal heating blowing pipe extends from the center of the die head and passes through the sizing ring to the front end of the bubble stabilizing frame, and the internal heating blowing pipe is concentric and coaxial with the sizing ring and the bubble stabilizing frame of the film blowing machine. The internal heating blowing pipe is concentric and coaxial with the sizing ring and the bubble stabilizing frame, so that the internal heating blowing pipe can blow hot air to the center of the film bubble, the cooling of the film bubble is more uniform, the temperature of the film bubble in the bubble stabilizing process gradually tends to room temperature, and finally the film bubble is shaped smoothly.
The external hot air device and the internal hot air device can adopt a fan to send out cold air and then heat the cold air through an air heating furnace to generate hot air.
For the hot air heat preservation film blowing method, the invention also provides a hot air heat preservation film blowing device, which adopts the following technical scheme:
The utility model provides a hot-blast heat preservation inflation film manufacturing installation, includes die head, wind ring, sizing ring and steady bubble frame, and die head, wind ring, sizing ring and steady bubble frame set gradually its characterized in that according to inflation film manufacturing direction: the device also comprises an external hot air device, an internal hot air device and a transition heating device; the air inlet of the air ring is connected with an external hot air device; an internal heating blowing pipe is arranged in the die head, an air inlet of the internal heating blowing pipe is connected with an internal hot air device, an air outlet of the internal heating blowing pipe penetrates through the sizing ring from the center of the die head to extend to the foam stabilizing frame, and the internal heating blowing pipe, the sizing ring of the film blowing machine and the foam stabilizing frame are concentric and coaxial; the transition heating device is arranged on the outer peripheral surface of the sizing ring.
The die head, the air ring, the sizing ring and the bubble stabilizing frame are arranged according to the film blowing direction, and are suitable for a film blowing mode of film blowing on or under a general film blowing machine.
As a preferred embodiment of the present invention, the transitional heating device includes at least three heating rings, and the heating rings are disposed on the outer circumferential surface of the sizing ring along the length direction of the sizing ring. The heating ring adopts an electric heating mode, and generally adopts an electric heating wire and the like.
As a further preferable scheme of the invention, the external hot air device comprises an external fan and an external air heating furnace, an air outlet of the external fan is connected with an air inlet of the external air heating furnace, and an air outlet of the external air heating furnace is connected with an air inlet of the air ring; the internal hot air device comprises an internal fan and an internal air heating furnace, an air outlet of the internal fan is connected with an air inlet of the internal air heating furnace, and an air outlet of the internal air heating furnace is connected with an air inlet of the internal hot air blowing pipe. The inner hot air device and the outer hot air device both adopt fans for air supply, cold air blown by the fans is heated by the heating furnace to form hot air, and the hot air is respectively sent to the inner hot air blowing pipe and the air ring.
Compared with the prior art, the invention has the following advantages:
The invention adopts a method of simultaneously carrying out external heat preservation and internal heat preservation on the film bubble in the extrusion process of the film bubble, the hot air ring blows hot air to the film bubble from the periphery of the extrusion opening, the sizing ring is heated by the transition heating device to ensure that the sizing ring provides a buffer cooling space for the film bubble, meanwhile, the hot air is blown into the film bubble to carry out internal heat preservation on the film bubble from the inside of the film bubble, and the extrusion temperature of the die head, the air outlet temperature of the hot air ring, the sizing heating temperature of the sizing ring by the transition heating device and the temperature of blowing hot air from the inside are sequentially decreased, so that the film bubble can be gradually cooled to room temperature from the extrusion temperature and finally cooled and shaped, the film bubble is in a transition cooling state in the extrusion process, thereby ensuring that the material with higher shaping temperature is smoothly blown into the film in a proper temperature environment, and improving the stability of the film bubble.
Drawings
FIG. 1 is a schematic view of a preferred embodiment of the present invention;
FIG. 2 is an enlarged view of A in FIG. 1;
Wherein each of the marks is as follows: the device comprises a 1-die head, a 2-air ring, a 3-sizing ring, a 4-foam stabilizing frame, a 5-external hot air device, a 501-external fan, a 502-external air heating furnace, a 6-internal hot air device, a 601-internal fan, a 602-internal air heating furnace, a 7-transition heating device, a 701-heating ring and an 8-internal hot air blowing pipe.
Detailed Description
The preferred embodiments of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 and 2, the hot air heat preservation film blowing device comprises a die head 1, an air ring 2, a sizing ring 3, a bubble stabilizing frame 4, an outer hot air device 5, an inner hot air device 6 and a transition heating device 7; the die head 1, the wind ring 2, the sizing ring 3 and the foam stabilizing frame 4 are sequentially arranged according to the film blowing direction; the air outlets of the air rings 2 are uniformly arranged along the peripheral direction of the extrusion opening of the die head 1, the air inlets of the air rings 2 are connected with an outer hot air device 5, the outer hot air device 5 comprises an outer fan 501 and an outer air heating furnace 502, the air outlets of the outer fan 501 are connected with the air inlets of the outer air heating furnace 502, and the air outlets of the outer air heating furnace 502 are connected with the air inlets of the air rings 2; an internal heating blowing pipe 8 is arranged in the die head 1, an air inlet of the internal heating blowing pipe 8 is connected with an internal hot air device 6, an air outlet of the internal heating blowing pipe 8 extends to the foam stabilizing frame 4 from the center of the die head 1 through the sizing ring 3, and the internal heating blowing pipe 8 is concentric and coaxial with the sizing ring 3 and the foam stabilizing frame 4 of the film blowing machine; the inner hot air device 6 comprises an inner fan 601 and an inner air heating furnace 602, wherein an air outlet of the inner fan 601 is connected with an air inlet of the inner air heating furnace 602, and an air outlet of the inner air heating furnace 602 is connected with an air inlet of an inner hot air blowing pipe 8; the transitional heating device 7 includes three heating rings 701, and the heating rings 701 are provided on the outer circumferential surface of the sizing ring 3 in the length direction of the sizing ring 3.
The hot air heat preservation film blowing method of the present invention will be described in further detail with reference to a preferred embodiment of the hot air heat preservation film blowing device.
The external hot air device 5 adopts a fan to supply air, and cold air blown out by the fan is heated by a heating furnace to form hot air to be supplied to the air ring 2, so that the air ring 2 becomes a hot air ring for blowing out the hot air. After the film bubble is extruded from the die head 1, the air ring 2 uniformly blows out hot air to the film bubble around the extrusion opening of the die head 1, and the air outlet temperature of the hot air ring 2 is slightly lower than the extrusion temperature of the die head 1, so that the material is not in the environment with suddenly reduced temperature after being extruded from the die head 1, and the physical property of the material is still maintained.
The transition heating device 7 comprises three heating rings 701, wherein the three heating rings 701 are arranged on the outer peripheral surface of the sizing ring 3 along the length direction of the sizing ring 3 to heat the sizing ring 3, so that the film bubble is ensured to have enough cooling and buffering stages in the sizing ring 3; the film bubble reaches the sizing ring 3, the sizing ring 3 provides a buffer cooling space for the film bubble, the outer side face of the film bubble is tightly attached to the inner side face of the sizing ring 3, so that the film bubble is in an environment with gradually reduced temperature in the sizing ring 3, the average temperature difference between two adjacent heating rings 701 is lower than 50 ℃, the cooling temperature of the film bubble in the sizing ring 3 can be in a process of continuously and gradually reduced in a small amplitude along the film blowing direction, and the physical property of a material is prevented from being changed due to overlarge cooling temperature reduction.
The hot air ring 2 and the transition heating device 7 together form the outer heat preservation of the film bubble between the extrusion and the stable bubble, however, the outer heat preservation alone cannot achieve better shaping effect, because the distance from the film bubble extrusion to the complete shaping of the film bubble is generally longer, the temperature in the film bubble is rapidly reduced at the rear part of the film bubble, namely the film bubble between the sizing ring 3 and the stable bubble frame 4, so that the inner surface of the film bubble contracts to influence the shaping effect, the important problem is solved, the inner heat blowing pipe 8 is further adopted to blow hot air into the film bubble, the inner heat preservation is carried out on the film bubble from the inner part of the film bubble, and the temperature of the inner blown hot air is set to be lower than the sizing heating temperature. The internal hot air device 6 adopts a fan to supply air, cold air blown by the fan is heated by a heating furnace to form hot air which is supplied to the internal hot air blowing pipe 8, an air outlet of the internal hot air blowing pipe 8 extends from the center of the die head 1 and passes through the sizing ring 3 to the front end of the bubble stabilizing frame 4, the internal hot air blowing pipe 8 is concentric and coaxial with the sizing ring 3 and the bubble stabilizing frame 4 of the film blowing machine, so that the internal hot air blowing pipe 8 can blow hot air to the center of the film bubble, the cooling of the film bubble is more uniform, and the temperature of the film bubble in the bubble stabilizing process gradually tends to room temperature. Along with continuous extrusion of the film bubble, the temperature of hot air blown out by the internal heating blowing pipe 8 is gradually reduced along the film blowing direction, so that the film bubble can be gradually cooled from the extrusion temperature to room temperature and finally cooled and shaped, and the film bubble is in a transitional cooling state in the extrusion process.
In addition, it should be noted that, in the specific embodiments described in the present specification, names of various parts and the like may be different, and all equivalent or simple changes of the structures, features and principles described in the conception of the present invention are included in the protection scope of the present invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the invention as defined in the accompanying claims.
Claims (4)
1. A hot air heat preservation film blowing method is characterized in that: when a die head of the film blowing machine blows out film bubbles, an internal heat blowing pipe is adopted to blow hot air from the die head to the interior of the film bubbles to carry out internal heat preservation, an air inlet of the internal heat blowing pipe is connected with an internal hot air device, an air outlet of the internal heat blowing pipe extends from the center of the die head and passes through a sizing ring to the front end of a bubble stabilizing frame, and the internal heat blowing pipe, the sizing ring of the film blowing machine and the bubble stabilizing frame are concentric and coaxial; meanwhile, the outer surface of the film bubble is subjected to external heat preservation by arranging a hot air ring and a transition heating device on a sizing ring, wherein the hot air ring is arranged at the extrusion port of a die head of a film blowing machine, air outlets of the hot air ring are uniformly distributed along the peripheral direction of the extrusion port of the die head, an air inlet of the hot air ring is connected with an external hot air device, and the transition heating device is arranged on the peripheral surface of the sizing ring; the extrusion temperature of the die head, the air outlet temperature of the hot air ring, the sizing heating temperature of the sizing ring by the transition heating device and the temperature of blowing hot air inside are sequentially decreased; the transition heating device comprises at least three heating rings, and the average temperature difference between two adjacent heating rings is lower than 50 ℃.
2. The hot air heat preservation film blowing device for blowing films according to the hot air heat preservation film blowing method of claim 1, comprising a die head, an air ring, a sizing ring and a foam stabilizing frame, wherein the die head, the air ring, the sizing ring and the foam stabilizing frame are sequentially arranged according to the film blowing direction, and the hot air heat preservation film blowing device is characterized in that: the device also comprises an external hot air device, an internal hot air device and a transition heating device; the air inlet of the air ring is connected with an external hot air device; an internal heating blowing pipe is arranged in the die head, an air inlet of the internal heating blowing pipe is connected with an internal hot air device, an air outlet of the internal heating blowing pipe penetrates through the sizing ring from the center of the die head to extend to the foam stabilizing frame, and the internal heating blowing pipe, the sizing ring of the film blowing machine and the foam stabilizing frame are concentric and coaxial; the transition heating device is arranged on the outer peripheral surface of the sizing ring.
3. The hot air thermal insulation film blowing device according to claim 2, wherein: the transition heating device comprises at least three heating rings, and the heating rings are arranged on the outer circumferential surface of the sizing ring along the length direction of the sizing ring.
4. A hot air insulating film blowing apparatus according to claim 2 or 3, characterized in that: the outer hot air device comprises an outer fan and an outer air heating furnace, an air outlet of the outer fan is connected with an air inlet of the outer air heating furnace, and an air outlet of the outer air heating furnace is connected with an air inlet of the air ring; the internal hot air device comprises an internal fan and an internal air heating furnace, an air outlet of the internal fan is connected with an air inlet of the internal air heating furnace, and an air outlet of the internal air heating furnace is connected with an air inlet of the internal hot air blowing pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210592432.0A CN114851517B (en) | 2022-05-28 | 2022-05-28 | Hot air heat preservation film blowing method and film blowing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210592432.0A CN114851517B (en) | 2022-05-28 | 2022-05-28 | Hot air heat preservation film blowing method and film blowing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114851517A CN114851517A (en) | 2022-08-05 |
| CN114851517B true CN114851517B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210592432.0A Active CN114851517B (en) | 2022-05-28 | 2022-05-28 | Hot air heat preservation film blowing method and film blowing device |
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| CN (1) | CN114851517B (en) |
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2022
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| CN104015349A (en) * | 2014-06-10 | 2014-09-03 | 四川大学 | Online thermal control device and method of PLA (polylactic acid) blown film |
| CN208543811U (en) * | 2018-06-15 | 2019-02-26 | 上海海湾石化有限公司 | A kind of double vane film cooling apparatus |
| CN109263029A (en) * | 2018-09-03 | 2019-01-25 | 广东金明精机股份有限公司 | Inflation film manufacturing machine vesicle diameter regulation device and regulation method |
| CN112571776A (en) * | 2020-11-24 | 2021-03-30 | 中国科学技术大学 | Film blowing device for realizing transverse blowing of liquid crystal polymer and preparation method |
| CN216400536U (en) * | 2021-11-19 | 2022-04-29 | 江门市江海区大坤塑料制品有限公司 | Film blowing machine |
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