CN213441147U - Film blow molding machine - Google Patents
Film blow molding machine Download PDFInfo
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- CN213441147U CN213441147U CN202021871588.5U CN202021871588U CN213441147U CN 213441147 U CN213441147 U CN 213441147U CN 202021871588 U CN202021871588 U CN 202021871588U CN 213441147 U CN213441147 U CN 213441147U
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Abstract
The utility model discloses a film blowing machine, including the hopper, heat the device, and the blown film device, the hopper is used for putting in plastic pellet, heat the device including the box, the screw rod, heater and temperature sensor, the heater is used for heating plastic pellet, temperature sensor is used for detecting the heating temperature, the blown film device is including the die head, decide the plug, wind ring and wind pressure sensor, the rotatory setting of die head, decide the plug including the urceolus, inner tube and draught fan, and be provided with interior air flue and outer air flue, interior air flue bottom communicates with each other with outer air flue bottom, the lower part diameter ratio upper portion diameter of urceolus is little, the lower part of urceolus evenly is provided with a plurality of gas outlet holes, the draught fan sets up on the inner wall of inner tube, the wind ring, a surface for cooling film, the. According to the utility model discloses a film blowing machine for the film thickness that blows off is more even, improves film processingquality.
Description
Technical Field
The invention relates to film production equipment, in particular to a film blow molding machine.
Background
With the advent of high density polyethylene, the development of blow molding machines, and the growing use of plastic packaging, flexible packaging is becoming the dominant force of food packaging materials, and blow molding technology has been widely used. Blown film is one of the most widely used forming methods in the production of plastic film, and blow molding machines are one of the most important mechanical devices in the industry.
The film blowing machine is a processing device which heats and melts plastic particles and then blows the plastic particles into a film. In the film blowing process, the condition that the thickness of the film is uneven is easy to occur, so that the processing quality of the film is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a film blowing machine can make the film thickness that blows off more even to improve film processingquality.
The film blow molding machine according to the embodiment of the utility model comprises a hopper for feeding plastic particles; the thermoplastic device comprises a box body, a screw, a heater and a temperature sensor; the box body is provided with a feed inlet, a containing cavity and a discharge outlet; the containing cavity is respectively communicated with the feed inlet and the discharge outlet; the feed inlet is communicated with an outlet of the hopper through a pipeline; the screw rod is rotatably arranged on the inner wall of the box body; the heater is arranged on the inner wall of the box body and used for heating the plastic particles; the temperature sensor is arranged on the inner wall of the box body and used for detecting the heating temperature; the film blowing device comprises a die head, a fixed core rod, a wind ring and a wind pressure sensor; the die head is arranged in a rotating mode, and an inlet of the die head is communicated with the discharge hole; the fixed core rod is connected with the die head and is arranged right above the die head, and comprises an outer cylinder, an inner cylinder and a draught fan, and is provided with an inner air passage and an outer air passage; the inner cylinder is arranged in the outer cylinder and is arranged between the inner air passage and the outer air passage; the bottom end of the inner air duct is communicated with the bottom end of the outer air duct; the diameter of the lower part of the outer cylinder is smaller than that of the upper part, and a plurality of air outlet through holes are uniformly formed in the lower part of the outer cylinder; the induced draft fan is arranged on the inner wall of the inner barrel; the air ring is connected to the outer side of the die head and used for cooling the outer surface of the film; the wind pressure sensor is used for detecting wind speed.
According to the utility model discloses film blowing machine has following technological effect at least: heating temperature is controlled through the temperature sensor, so that plastic particles are dissolved more fully, the rotary die head and the wind pressure sensor are arranged, wind is blown more uniformly during blow molding, the upper width and the lower width of the draught fan and the outer cylinder of the fixed core rod are arranged with the air outlet through holes, so that plastic can be blown fully and uniformly when coming out from the die head, the thickness of blown films is more uniform, and the processing quality of the films is improved.
According to some embodiments of the utility model, the inner wall of discharge gate is provided with the filter screen.
According to some embodiments of the invention, the device is moulded to heat is including auxiliary heater, auxiliary heater set up in the periphery of filter screen.
According to some embodiments of the utility model, still including transparent soft curtain, transparent soft curtain surrounds the blown film device for separate the temperature and separate the wind.
According to some embodiments of the present invention, the winding device further comprises a winding device, wherein the winding device comprises a winding wheel and a winding driver; the winding wheel is used for winding the film; the winding driver is used for driving the winding wheel to rotate.
According to some embodiments of the invention, the winding device comprises two squeeze rollers; and the film pressing rollers are arranged above the fixed core rod and used for flattening the film.
According to the utility model discloses a some embodiments, coiling mechanism is including herringbone splint, herringbone splint set up in the set core rod with between the film pressing roller, the opening of herringbone splint is facing to the set core rod.
According to some embodiments of the utility model, the chevron shape splint are provided with two at least cold wind shower nozzles, the cold wind shower nozzle to the center of chevron shape splint is bloied.
According to some embodiments of the utility model, the cold wind shower nozzle is provided with a plurality ofly to evenly set up in parallel in on the inner wall of chevron shape splint.
According to some embodiments of the utility model, the coiling mechanism is including the guide roll, the guide roll set up in press mold roller with between the winding wheel.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic cross-sectional view of a blown film apparatus according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a mandrel of the blown film machine shown in fig. 1.
Reference numerals:
a film blowing machine 100,
A hopper 200,
The film blowing device 400, the die head 410, the core fixing rod 420, the outer cylinder 421, the inner cylinder 422, the induced draft fan 423, the inner air channel 424, the outer air channel 425, the air outlet hole 426, the air ring 430, the air inlet pipe, the air outlet pipe and the air outlet pipe,
The device comprises a winding device 500, a winding wheel 510, a film pressing roller 520, a herringbone clamping plate 530, a cold air spray head 531 and a guide roller 540.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
A film blowing machine 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 2.
As shown in fig. 1 to 2, a film blowing machine 100 according to an embodiment of the present invention includes a hopper 200, a thermoplastic molding device 300, and a film blowing device 400.
The hopper 200 is used for throwing plastic particles; the thermoplastic device 300 comprises a box body 310, a screw 320, a heater 330 and a temperature sensor 340; the box body 310 is provided with a feeding hole, a containing cavity and a discharging hole; the cavity is respectively communicated with the feed inlet and the discharge outlet; the feed inlet is communicated with the outlet of the hopper 200 through a pipeline; the screw 320 is rotatably mounted on the inner wall of the box body 310; the heater 330 is disposed on the inner wall of the cabinet 310 for heating the plastic particles; the temperature sensor 340 is disposed on an inner wall of the case 310, and is configured to detect a heating temperature; the film blowing device 400 comprises a die head 410, a core fixing rod 420, an air ring 430 and an air pressure sensor; the die head 410 is rotatably arranged, and an inlet of the die head 410 is communicated with the discharge hole; the fixed core rod 420 is connected with the die head 410 and is arranged right above the die head 410, the fixed core rod 420 comprises an outer cylinder 421, an inner cylinder 422 and an induced draft fan 423 and is provided with an inner air passage 424 and an outer air passage 425; the inner tub 422 is provided inside the outer tub 421 and between the inner duct 424 and the outer duct 425; the bottom end of the inner air passage 424 is communicated with the bottom end of the outer air passage 425; the diameter of the lower part of the outer cylinder 421 is smaller than that of the upper part, and a plurality of air outlet through holes 426 are uniformly arranged on the lower part of the outer cylinder 421; the induced draft fan 423 is arranged on the inner wall of the inner cylinder 422; a wind ring 430 is attached to the outside of the die 410 for cooling the outer surface of the film; the wind pressure sensor is used for detecting wind speed.
As shown in fig. 1, the hopper 200 is used for feeding plastic particles, the thermoplastic molding device 300 includes a box 310, a screw 320, a heater 330 and a temperature sensor 340, the box 310 is provided with a feeding port, a containing port and a discharging port, the containing port is respectively communicated with the feeding port and the discharging port, the feeding port is communicated with an outlet of the hopper 200 through a pipeline, the screw 320 is rotatably installed on an inner wall of the box 310, the heater 330 is installed on the inner wall of the box 310 and is used for heating the plastic particles, and the temperature sensor 340 is installed on the inner wall of the box 310 and is used for detecting a heating temperature. The plastic particles are introduced into the chamber through the outlet and the feed port of the hopper 200, and the heater 330 heats the plastic particles to turn the plastic particles into liquid and extrude from the feed port by the rotation of the screw 320. The film blowing device 400 comprises a die head 410, a fixed core rod 420, a wind ring 430 and a wind pressure sensor, wherein the die head 410 is rotatably arranged, an inlet of the die head 410 is communicated with a discharge hole, so that the wind speed suffered by the plastic when the plastic comes out of the die head 410 is relatively uniform, the fixed core rod 420 is connected with the die head 410 and is arranged right above the die head 410, and the liquid plastic is extruded from the die head 410 to reach the fixed core rod 420.
As shown in fig. 2, the core fixing rod 420 includes an outer cylinder 421, an inner cylinder 422 and an induced draft fan 423, and is provided with an inner air passage 424 and an outer air passage 425, the inner cylinder 422 is disposed in the outer cylinder 421 and is disposed between the inner air passage 424 and the outer air passage 425, the bottom end of the inner air passage 424 is communicated with the bottom end of the outer air passage 425, the diameter of the lower portion of the outer cylinder 421 is smaller than that of the upper portion, the lower portion of the outer cylinder 421 is uniformly provided with a plurality of air outlet holes 426, the induced draft fan 423 is disposed on the inner wall of the inner cylinder 422, and under the action of the induced draft fan 423, air is uniformly blown into the outer air passage 425 from the inner air passage 424 and is. The outer cylinder 421 has a wide top and a narrow bottom and is uniformly provided with air outlet through holes 426, so that the plastic can be fully and uniformly blown when being blown from the die head 410, and the plastic is prevented from knotting due to immediate contact with the core fixing rod 420. The wind ring 430 is connected to the outer side of the die head 410 for cooling the outer surface of the film, the wind pressure sensor is used for detecting the wind speed, and the wind ring 430 blows to the plastic film from the periphery of the die head 410 and passes through the wind pressure sensor, so that the blowing wind pressure is relatively uniform.
In the film blowing process, the condition that the thickness of the film is uneven is easy to occur, so that the processing quality of the film is influenced. The embodiment of the utility model provides an in film blowing machine 100, through temperature sensor 340 control heating temperature for plastic pellet dissolves more fully, through setting up rotary die head 410 and wind pressure sensor, it is more even to receive the wind during making the blowing mould, narrow and the setting of the through-hole 426 of giving vent to anger about draught fan 423, urceolus 421 through deciding plug 420 wide, when making the plastic come out from die head 410, can be by abundant even inflation, thereby make the film thickness that blows off more even, improve film processingquality.
The utility model discloses an in some embodiments, the inner wall of discharge gate is provided with filter screen 350, blocks through filter screen 350 that the plastics that do not fully dissolve get into die head 410, is favorable to guaranteeing that the blown film is even, improves film processingquality.
In some embodiments of the present invention, the thermoplastic molding apparatus 300 comprises an auxiliary heater 360, and the auxiliary heater 360 is disposed at the periphery of the filter screen 350. For not melting plastics on the heating filter screen 350 through auxiliary heating device, can prevent that filter screen 350 from blockking up, be favorable to guaranteeing that processing lasts and going on, improves production efficiency.
In some embodiments of the present invention, a transparent soft curtain is further included, and the film blowing device 400 is surrounded by the transparent soft curtain for heat insulation and wind insulation. The influence of external temperature and air flow on the film blowing is isolated through the transparent soft curtain, so that the film blowing uniformity is guaranteed, and the production quality is improved.
In some embodiments of the present invention, the winding device 500 further comprises a winding device 500, wherein the winding device 500 comprises a winding wheel 510 and a winding driver; the winding wheel 510 is used for winding the film; the winding driver is used for driving the winding wheel 510 to rotate. Set up automatic pivoted winding wheel 510, replace artifical rolling, can improve production efficiency.
In some embodiments of the present invention, the winding device 500 comprises two squeeze rollers 520; two squeeze film rollers 520 are disposed above the set bar 420 for flattening the film. The film is flattened and then rolled, so that the film can be rolled more smoothly.
In some embodiments of the present invention, the winding device 500 comprises a herringbone clamping plate 530, the herringbone clamping plate 530 is disposed between the mandrel 420 and the lamination roller 520, and an opening of the herringbone clamping plate 530 faces the mandrel 420. The herringbone clamping plate 530 is used for guiding, and rolling flattening is facilitated.
In some embodiments of the present invention, the herringbone clamping plate 530 is provided with at least two cold air nozzles 531, and the cold air nozzles 531 blow air to the center of the herringbone clamping plate 530. The cold air nozzle 531 is arranged to blow the film, which is beneficial to preventing the film from being scratched when contacting the herringbone clamping plate 530.
In some embodiments of the present invention, the cold air blowing head 531 is provided in plurality and is uniformly disposed in parallel on the inner wall of the herringbone clamping plate 530. And the cold air nozzles 531 are uniformly arranged, so that the two ends of the film are uniformly ventilated, and the rolling is smooth.
In some embodiments of the present invention, the rolling device 500 comprises a guiding roller 540, and the guiding roller 540 is disposed between the film pressing roller 520 and the rolling wheel 510. The guide roller 540 is beneficial to keeping the film in a tight state in the rolling process, thereby being beneficial to rolling and leveling.
The blown film blowing machine 100 according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 2 as a specific embodiment. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.
As shown in fig. 1, the hopper 200 is used for feeding plastic particles, the thermoplastic molding device 300 includes a box 310, a screw 320, a heater 330, a temperature sensor 340 and an auxiliary heater 360, the box 310 is provided with a feeding port, a containing port and a discharging port, the containing port is respectively communicated with the feeding port and the discharging port, the feeding port is communicated with an outlet of the hopper 200 through a pipeline, a filter screen 350 is arranged on an inner wall of the discharging port, the auxiliary heater 360 is arranged at the periphery of the filter screen 350, the screw 320 is rotatably installed on the inner wall of the box 310, the heater 330 is arranged on the inner wall of the box 310 and used for heating the plastic particles, and the temperature sensor 340 is arranged on the inner. The plastic particles pass through the outlet and the inlet of the hopper 200, are filtered by the screen 350, and then enter the chamber, and the heater 330 heats the plastic particles, so that the plastic particles become liquid and are extruded from the inlet by the rotation of the screw 320. The film blowing device 400 comprises a die head 410, a fixed core rod 420, a wind ring 430 and a wind pressure sensor, wherein the die head 410 is rotatably arranged, an inlet of the die head 410 is communicated with a discharge hole, so that the wind speed suffered by the plastic when the plastic comes out of the die head 410 is relatively uniform, the fixed core rod 420 is connected with the die head 410 and is arranged right above the die head 410, and the liquid plastic is extruded from the die head 410 to reach the fixed core rod 420.
As shown in fig. 2, the core fixing rod 420 includes an outer cylinder 421, an inner cylinder 422 and an induced draft fan 423, and is provided with an inner air passage 424 and an outer air passage 425, the inner cylinder 422 is disposed in the outer cylinder 421 and is disposed between the inner air passage 424 and the outer air passage 425, the bottom end of the inner air passage 424 is communicated with the bottom end of the outer air passage 425, the diameter of the lower portion of the outer cylinder 421 is smaller than that of the upper portion, the lower portion of the outer cylinder 421 is uniformly provided with a plurality of air outlet holes 426, the induced draft fan 423 is disposed on the inner wall of the inner cylinder 422, and under the action of the induced draft fan 423, air is uniformly blown into the outer air passage 425 from the inner air passage 424 and is. The outer cylinder 421 has a wide top and a narrow bottom and is provided with air outlet holes 426, so that the plastic can be fully and uniformly blown when being blown from the die head 410, and the plastic is prevented from knotting due to immediate contact with the core fixing rod 420. The wind ring 430 is connected to the outer side of the die head 410 for cooling the outer surface of the film, the wind pressure sensor is used for detecting the wind speed, and the wind ring 430 blows to the plastic film from the periphery of the die head 410 and passes through the wind pressure sensor, so that the blowing wind pressure is relatively uniform.
The film blowing device 400 is surrounded by a transparent soft curtain for heat insulation and wind insulation. The winding device 500 comprises a winding wheel 510, a winding driver, two film pressing rollers 520, a herringbone clamping plate 530 and a guide roller 540, the winding wheel 510 is used for winding the film, the winding driver is used for driving the winding wheel 510 to rotate, the two film pressing rollers 520 are arranged above the mandrel 420 and used for flattening the film, the herringbone clamping plate 530 is arranged between the mandrel 420 and the film pressing rollers 520, the opening of the herringbone clamping plate 530 faces the mandrel 420, the herringbone clamping plate 530 is provided with a cold air nozzle 531, the cold air nozzle 531 is provided with a plurality of cold air nozzles, the cold air nozzles are uniformly arranged on the inner wall of the herringbone clamping plate 530 in parallel, and the cold air nozzle 531 blows air to the center of the herringbone clamping plate. The guide roller 540 is disposed between the squeeze roller 520 and the winding wheel 510.
According to the utility model discloses film blowing machine 100, through so setting up, some effects as follows at least can be reached, through temperature sensor 340 control heating temperature, make plastic pellet dissolve more fully, through setting up rotary die head 410 and wind pressure sensor, make the wind-engaging more even during the blow molding, draught fan 423 through decide plug 420, narrow and the setting of through-hole 426 of giving vent to anger about urceolus 421 upper and lower width, make the plastic come out from die head 410, can be by abundant even inflation, thereby make the film thickness who blows off more even, improve film process quality.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A blown film machine, comprising:
the hopper is used for throwing plastic particles;
the thermoplastic device comprises a box body, a screw, a heater and a temperature sensor; the box body is provided with a feed inlet, a containing cavity and a discharge outlet; the containing cavity is respectively communicated with the feed inlet and the discharge outlet; the feed inlet is communicated with an outlet of the hopper through a pipeline; the screw rod is rotatably arranged on the inner wall of the box body; the heater is arranged on the inner wall of the box body and used for heating the plastic particles; the temperature sensor is arranged on the inner wall of the box body and used for detecting the heating temperature;
the film blowing device comprises a die head, a fixed core rod, a wind ring and a wind pressure sensor; the die head is arranged in a rotating mode, and an inlet of the die head is communicated with the discharge hole; the fixed core rod is connected with the die head and is arranged right above the die head, and comprises an outer cylinder, an inner cylinder and a draught fan, and is provided with an inner air passage and an outer air passage; the inner cylinder is arranged in the outer cylinder and is arranged between the inner air passage and the outer air passage; the bottom end of the inner air duct is communicated with the bottom end of the outer air duct; the diameter of the lower part of the outer cylinder is smaller than that of the upper part, and a plurality of air outlet through holes are uniformly formed in the lower part of the outer cylinder; the induced draft fan is arranged on the inner wall of the inner barrel; the air ring is connected to the outer side of the die head and used for cooling the outer surface of the film; the wind pressure sensor is used for detecting wind speed.
2. A machine as claimed in claim 1, characterized in that the inner wall of the outfeed is provided with a sieve.
3. The machine of claim 2, wherein the thermoplastic device comprises an auxiliary heater disposed about a periphery of the screen.
4. The machine of claim 1 further comprising a flexible transparent curtain surrounding said film blowing means for insulating from heat and wind.
5. The machine of claim 1, further comprising a take-up device comprising a take-up wheel and a take-up drive; the winding wheel is used for winding the film; the winding driver is used for driving the winding wheel to rotate.
6. A machine as claimed in claim 5, characterized in that said winding means comprise two lamination rollers; and the film pressing rollers are arranged above the fixed core rod and used for flattening the film.
7. The machine of claim 6, wherein the take-up device comprises chevron-shaped jaws disposed between the mandrel and the lamination roll, the chevron-shaped jaws having openings facing the mandrel.
8. A film blowing machine according to claim 7, characterized in that the gable is provided with at least two cold air blowing nozzles blowing air towards the centre of the gable.
9. A machine according to claim 8, characterized in that a plurality of cold air blowing nozzles are provided and arranged uniformly parallel on the inner wall of the gable.
10. The machine of claim 6, wherein the take-up mechanism includes a guide roller disposed between the lamination roller and the take-up wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021871588.5U CN213441147U (en) | 2020-08-31 | 2020-08-31 | Film blow molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021871588.5U CN213441147U (en) | 2020-08-31 | 2020-08-31 | Film blow molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213441147U true CN213441147U (en) | 2021-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021871588.5U Active CN213441147U (en) | 2020-08-31 | 2020-08-31 | Film blow molding machine |
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| CN (1) | CN213441147U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643688A (en) * | 2022-02-23 | 2022-06-21 | 河北誉宏包装装潢有限公司 | Forming film blowing device for heating and melting plastic particles and using method |
| CN116653273A (en) * | 2023-08-01 | 2023-08-29 | 沈阳东源包装制品有限公司 | Plastic film blowing process and control method |
-
2020
- 2020-08-31 CN CN202021871588.5U patent/CN213441147U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114643688A (en) * | 2022-02-23 | 2022-06-21 | 河北誉宏包装装潢有限公司 | Forming film blowing device for heating and melting plastic particles and using method |
| CN114643688B (en) * | 2022-02-23 | 2023-06-02 | 河北誉宏包装装潢有限公司 | Plastic particle heating and melting molding film blowing device and use method thereof |
| CN116653273A (en) * | 2023-08-01 | 2023-08-29 | 沈阳东源包装制品有限公司 | Plastic film blowing process and control method |
| CN116653273B (en) * | 2023-08-01 | 2023-09-22 | 沈阳东源包装制品有限公司 | Plastic film blowing process and control method |
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