CN107053648A - Upward type internal cooling structure for multilayer co-extrusion film blowing machine - Google Patents
Upward type internal cooling structure for multilayer co-extrusion film blowing machine Download PDFInfo
- Publication number
- CN107053648A CN107053648A CN201710384342.1A CN201710384342A CN107053648A CN 107053648 A CN107053648 A CN 107053648A CN 201710384342 A CN201710384342 A CN 201710384342A CN 107053648 A CN107053648 A CN 107053648A
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- Prior art keywords
- annular
- wind
- interior cold
- cold wind
- chamber
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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
- 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
-
- 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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
-
- 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
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
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- 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)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A kind of upward type internal cooling structure for multilayer co-extrusion film blowing machine, including blown-film die, the surface of blown-film die are provided with interior cold wind ring, and interior cold wind is equipped with the interior cold wind chamber of annular, and the surrounding edge of interior cold wind ring is formed with interior cold air outlet；Vertical discharge pipe and vertical blast pipe are provided with blown-film die center, air intake tube wall is enclosed on air-out tube wall periphery, and the annular gap between air intake tube wall and air-out tube wall is formed as total air intake passage, the total air-out passage of segment dislocation of discharge pipe；Discharge pipe is extended up to above interior cold wind ring from blown-film die；The interior cold air outlet of the interior cold wind ring is obliquely downward；First annular wall is additionally provided with above interior cold wind ring, first annular wall offers multiple exhaust vents；The second annular wall is additionally provided with below interior cold wind ring；The recovery wind-guiding disk of annular is provided between the second annular chamber and blown-film die.The present invention can improve film bubble internal layer cooling effect and not influence film bubble operation stability.
Description
Technical field
The invention belongs to the technical field of co-extrusion film blowing machine, and in particular in a kind of upward type co-extrusion film blowing machine
Air-cooled structure.
Background technology
Plastic sheeting can be produced using upward type blowing, in process of production, circle of the plastics melt from head
Annular film bubble extrusion is extruded and forms film bubble upwards, and film bubble is located at the cooling beside film bubble by traction constantly motion upwards
Vane then constantly blows out upward air, and on the one hand air plays supporting ＆ stablizing effect to film bubble, and main aspect is to film
Puff is to cooling effect.
What the film bubble of co-extrusion film blowing machine production was composited by inside and outside laminated plastics material, each layer material is both needed to obtain
Synchronous cooling.Although the existing existing outer cold wind ring of co-extrusion film blowing machine（Outside film bubble, the cooling gas of centripetal direction is blown out
Stream, is cooled down from film bubble outside）, there is interior cold wind ring again（Inside film bubble, the cooling air-flow of centrifugal direction is blown out, from film
Bubble the inside is cooled down）, however, due to space limiting factor, making the cooling air-flow inside film bubble than the cooling gas outside film bubble
Stream is more difficult to tissue and control（Such as film bubble inner surface below interior cold wind ring is difficult to direct cooling）, thus, in the prior art,
Multi-layer co-extruded obtained film bubble is often preferable close to the material cooling effect of outer layer, and film bubble is past close to the material cooling effect of internal layer
Toward poor, when bubble thickness is larger, speed of production of film is higher, this species diversity becomes apparent, therefore further results in film
Bubble internal layer material condenses, crystalline quality is poor.In the prior art, in order to improve the cooling effectiveness of film bubble internal layer, can only increase in
The wind speed of cold wind ring, but wind speed is excessive, and meaning requires that the blast inside cooling vane is higher, and blast gets over Gao Zeyue and is unfavorable for gas
Stream uniformly, stably, and then easily makes film bubble fluctuation of service, and this also have impact on blowfilm shaping quality.
The content of the invention
A kind of upward type internal cooling structure for multilayer co-extrusion film blowing machine is provided it is an object of the invention to overcome disadvantages mentioned above, it
Film bubble internal layer cooling effect can be improved and film bubble operation stability is not influenceed.
Its purpose can be realized by following scheme：The upward type internal cooling structure for multilayer co-extrusion film blowing machine includes blown-film die,
Blown-film die is provided with the annular film bubble extrusion of top, and the surface of blown-film die is provided with interior cold wind ring, interior cold wind ring
Interior cold wind chamber provided with annular, the surrounding edge of interior cold wind ring is formed with interior cold air outlet；In blown-film die center provided with perpendicular
To discharge pipe and vertical blast pipe, air intake tube wall is enclosed on air-out tube wall periphery, air intake tube wall and air-out tube wall
Between annular gap be formed as total air intake passage, the total air-out passage of segment dislocation of discharge pipe；Discharge pipe is from blown-film die
Extend up to above interior cold wind ring；It is mainly characterized by, and the interior cold air outlet of the interior cold wind ring is obliquely downward；Inside
First annular wall is additionally provided with above cold wind ring, first annular wall is set in the periphery of discharge pipe, first annular wall and discharge pipe pipe
First annular chamber is formed between wall, multiple first intercommunicating pores are provided between first annular chamber and the interior cold wind chamber of interior cold wind ring, the
The top of one annular chamber is provided with seal cover board；The upper port of the discharge pipe is exposed above seal cover board；First annular wall is opened
Provided with multiple exhaust vents；The second annular wall is additionally provided with below interior cold wind ring, the second annular wall is located above blown-film die, second
Annular wall is set in the periphery of discharge pipe, and the second annular chamber, the second annular chamber are formed between the second annular wall and air-out tube wall
Multiple second intercommunicating pores are provided between the interior cold wind chamber of interior cold wind ring；Annulus is provided between the second annular chamber and blown-film die
The recovery wind-guiding disk of shape, the diameter for reclaiming wind-guiding disk is less than the diameter of the annular film bubble extrusion；Reclaim wind-guiding circle
Disk is made up of the upper disc of annular and the lower disc of annular, and upper disc and lower disc are enclosed on the periphery of the discharge pipe；On
Disc and lower disc are formed with the recovery wind guide chamber of annular after above-below direction clamping, the outer edge of upper disc and lower disc it
Between leave gap and be formed as annular recovery wind-guiding seam；Many horizontal directions are additionally provided with inside recovery wind-guiding disk to prolong
Recovery levels guide duct, many vertically extending vertical wind-guiding tubules stretched；Each recovery levels guide duct is justified with reclaiming wind-guiding
It is distributed centered on the center of circle of disk in homogeneous radiation shape, the central axis bearing of trend of each recovery levels guide duct is recovery wind-guiding
The radial direction of disk；The quantity of vertical wind-guiding tubule is identical with the quantity of recovery levels guide duct, vertical wind-guiding tubule and recycle-water
The alternate arrangement of flat guide duct, the floor projection position of every vertical wind-guiding tubule is located at corresponding adjacent two recovery levels wind-guidings
In sector region between pipe, and vertical wind-guiding tubule is vertical with corresponding adjacent two recovery levels guide ducts composition antarafacial；
The distal end of every recovery levels guide duct is directly connected with the recovery wind guide chamber, the proximal part of every recovery levels guide duct
Tube chamber directly with the discharge pipe is connected；The upper end of every vertical wind-guiding tubule is directly connected with second annular chamber, often
The lower end of the vertical wind-guiding tubule of root is directly connected with total air intake passage.
The present invention has advantages below and effect：
First, the present invention is during blown film, and interior cold airflow enters the second annular chamber from total air intake passage through vertical wind-guiding tubule, by
Second annular chamber is after the second intercommunicating pore enters the interior cold wind chamber of interior cold wind ring, and interior cold airflow is organized into two strands, wherein
Main air continues up operation, enters first annular chamber by the first intercommunicating pore, by multiple exhaust vents of first annular wall
Film bubble is blowed to, film bubble is implemented to cool down, then the upper port through discharge pipe enters total air-out passage；Secondary air flow is by interior cold wind
The interior cold air outlet of ring blows to obliquely downward, and then the annular gap between film bubble and the second annular wall flows downward, until
The recovery wind-guiding seam for reclaiming wind-guiding disk is reached, and is stitched by recovery wind-guiding into the recovery wind guide chamber for reclaiming wind-guiding disk, through returning
Horizontal guide duct is received into total air-out passage.Above-mentioned two strands of air-flows are located inside film bubble, at the same directly internally above cold wind ring and
The inner surface of film bubble below interior cold wind ring is cooled down, and can strengthen the cooling effect to film bubble internal layer, makes film bubble internal layer and film
Steep outer layer cooling effect substantially close to.
2nd, importantly, above-mentioned secondary air flow due to the direction of motion down（It is in opposite direction with bubble movement）, so that
Air-flow and the speed of related movement of film bubble are improved, therefore the cooling velocity to film bubble can be improved, the crystallization of film bubble internal layer is improved
Quality, also creates precondition to improve film bubble extruded velocity.On the other hand, although the relative motion of cooling air-flow and film bubble
Speed is improved, but the speed of air-flow itself is not improved, it is meant that the gas pressure inside vane need not be improved, therefore will not
Have influence on the stability of film bubble.
Brief description of the drawings
Fig. 1 is the overall structure and use state schematic diagram of a kind of specific embodiment of the invention.
Fig. 2 is the close-up schematic view of Fig. 1 the latter half.
Fig. 3 is the close-up schematic view of Fig. 1 center section.
Fig. 4 is that the structure and cooling air of Fig. 3 interior cold wind ring flow to schematic diagram.
Fig. 5 is that the structure and cooling air of the recovery wind-guiding disk in Fig. 2 flow to schematic diagram.
Fig. 6 is the dimensional structure diagram of the upper disc in Fig. 5.
Fig. 7 is the present invention looks up structural representation of the upper disc in Fig. 5.
Fig. 8 is the horizontal profile structure schematic diagram of the upper disc in Fig. 7.
Fig. 9 is the cross-sectional view of the A-A in Fig. 8.
Figure 10 is the cross-sectional view of the B-B in Fig. 8.
Figure 11 is that the cooling air for the recovery wind guide chamber for reclaiming wind-guiding disk flows to schematic diagram into total air-out passage.
Embodiment
Upward type internal cooling structure for multilayer co-extrusion film blowing machine shown in Fig. 1, Fig. 2, Fig. 3 includes blown-film die 1, blown-film die 1
The annular film bubble extrusion 11 of top is provided with, the surface of blown-film die 1 is provided with interior cold wind ring 2, and interior cold wind ring 2 is provided with
The interior cold wind chamber 21 of annular, the surrounding edge of interior cold wind ring 21 is formed with interior cold air outlet 22；It is provided with the center of blown-film die 1
Vertical discharge pipe 7 and vertical blast pipe 6, the tube wall of blast pipe 6 are enclosed on the tube wall of discharge pipe 7 periphery, the tube wall of blast pipe 6 and air-out
Annular gap between the tube wall of pipe 7 is formed as total air intake passage 61, the total air-out passage 71 of segment dislocation of discharge pipe 7；Air-out
Pipe 7 extends up to the interior top of cold wind ring 2 from blown-film die 1.
Shown in Fig. 4, the interior cold air outlet 22 of the interior cold wind ring is obliquely downward；Shown in Fig. 1, Fig. 3, in interior cold wind ring 2
Top is additionally provided with first annular wall 31, and first annular wall 31 is set in the periphery of discharge pipe 7, first annular wall 31 and discharge pipe 7
First annular chamber 32 is formed between tube wall, is connected between first annular chamber 32 and the interior cold wind chamber 21 of interior cold wind ring provided with multiple first
Through hole 33, the top of first annular chamber 32 is provided with seal cover board 34；The upper port 710 of the discharge pipe 7 is exposed in seal cover board 7
Top；First annular wall 31 offers multiple exhaust vents 35.
Shown in Fig. 1, Fig. 3, Fig. 4, the second annular wall 41 is additionally provided with below interior cold wind ring 2, the second annular wall 41, which is located at, blows
The top of film head 1, the second annular wall 41 is set in the periphery of discharge pipe 7, is formed between the second annular wall 41 and the tube wall of discharge pipe 7
Multiple second intercommunicating pores 43 are provided between the interior cold wind chamber 21 of second annular chamber 42, the second annular chamber 42 and interior cold wind ring.
Shown in Fig. 1, Fig. 2, the recovery wind-guiding disk 5 of annular is provided between the second annular chamber 42 and blown-film die 1, is returned
The diameter for receiving wind-guiding disk 5 is less than the diameter of the annular film bubble extrusion 11；
Shown in Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, wind-guiding disk 5 is reclaimed under the upper disc 51 and annular of annular
Disc 52 is constituted, and upper disc 51 and lower disc 52 are enclosed on the periphery of the discharge pipe 7；Upper disc 51 and lower disc 52 are from upper and lower
The recovery wind guide chamber 53 of annular is formed with after to clamping, gap is left between upper disc 51 and the outer edge of lower disc 52 and shape
Recovery wind-guiding seam 54 as annular；The recovery levels that many horizontal directions extend are additionally provided with reclaiming the inside of wind-guiding disk 5
Guide duct 55, many vertically extending vertical wind-guiding tubules 56；Each recovery levels guide duct 55 is to reclaim the circle of wind-guiding disk 2
It is distributed centered on the heart in homogeneous radiation shape, the central axis bearing of trend of each recovery levels guide duct 55 is recovery wind-guiding disk
Radial direction；The quantity of vertical wind-guiding tubule 56 is identical with the quantity of recovery levels guide duct 55, is all eight, vertical wind-guiding tubule
56 and the alternate arrangement of recovery levels guide duct 55, the floor projection position of every vertical wind-guiding tubule 56 is located at corresponding adjacent two
In sector region between root recovery levels guide duct 55, and the central axis of vertical wind-guiding tubule 56 with corresponding adjacent two
It is vertical that the central axis of recovery levels guide duct 55 constitutes antarafacial；
Shown in Figure 10, Figure 11, the distal end of every recovery levels guide duct 55 is directly connected with the recovery wind guide chamber 53, every
Tube chamber of the proximal part of recovery levels guide duct 55 directly with the discharge pipe 7 is connected；
Shown in Fig. 5, Fig. 2, the upper end of every vertical wind-guiding tubule 56 is directly connected with second annular chamber 42, and every is vertically led
The lower end of wind tubule 56 is directly connected with total air intake passage 61.
Above-described embodiment is in use, interior cold airflow enters the second annular chamber from total air intake passage 61 through vertical wind-guiding tubule 56
32, arrow, the interior cold wind chamber 21 of interior cold wind ring is entered by the second annular chamber 42 by the second intercommunicating pore 43 as shown in Figure 1 and Figure 2
Afterwards, interior cold airflow is organized into two strands, and wherein main air continues up operation, enters first by the first intercommunicating pore 33
Annular chamber 32, finally blows to film bubble 8, as shown in Figure 2, Figure 3, Figure 4 arrow, to film bubble by multiple exhaust vents 35 of first annular wall
8 implement cooling, and then the upper port 710 through discharge pipe 7 enters total air-out passage 71, the outside of discharge blown-film die 1, such as Fig. 1, figure
2nd, arrow shown in Fig. 3；Secondary air flow cold air outlet 22 in interior cold wind ring blows to obliquely downward, into the ring of film bubble 8 and second
Annular gap between shape wall 41, as shown in Figure 1, Figure 2, shown in Fig. 8 arrows, then flows downward, wind-guiding disk is reclaimed until reaching
Recovery wind-guiding seam 54, and by recovery wind-guiding stitch 54 enter reclaim wind-guiding disks recovery wind guide chambers 53, arrow as shown in figure 11,
Recovered horizontal guide duct 55 enters total air-out passage 71.
Above-described embodiment is in use, in the periphery of film bubble 8 also with outer cold wind ring 9 is arranged with, as shown in figure 1, i.e. outer cold wind
Ring and inner-cooling structure are used simultaneously, and the inner surface and outer surface to film bubble 8 are cooled down simultaneously.
Claims (2)
1. a kind of upward type internal cooling structure for multilayer co-extrusion film blowing machine, including blown-film die, blown-film die are provided with the circle of top
Annular film bubble extrusion, the surface of blown-film die is provided with interior cold wind ring, and interior cold wind is equipped with the interior cold wind chamber of annular, interior cold
The surrounding edge of vane is formed with interior cold air outlet；Vertical discharge pipe and vertical blast pipe are provided with blown-film die center,
Air intake tube wall is enclosed on air-out tube wall periphery, and the annular gap between air intake tube wall and air-out tube wall is formed as always entering
Wind passage, the segment dislocation of discharge pipe is total air-out passage；Discharge pipe is extended up to above interior cold wind ring from blown-film die；Its
It is characterised by being characterized in that：The interior cold air outlet of the interior cold wind ring is obliquely downward；Is additionally provided with above interior cold wind ring
One annular wall, first annular wall is set in the periphery of discharge pipe, forms first annular between first annular wall and air-out tube wall
Multiple first intercommunicating pores are provided between the interior cold wind chamber of chamber, first annular chamber and interior cold wind ring, the top of first annular chamber is provided with
Seal cover board；The upper port of the discharge pipe is exposed above seal cover board；First annular wall offers multiple exhaust vents；First
Annular wall offers multiple exhaust vents；The second annular wall is additionally provided with below interior cold wind ring, the second annular wall is located at blown-film die
Top, the second annular wall is set in the periphery of discharge pipe, and the second annular chamber is formed between the second annular wall and air-out tube wall, the
Multiple second intercommunicating pores are provided between second ring chamber and the interior cold wind chamber of interior cold wind ring；Between the second annular chamber and blown-film die
Recovery wind-guiding disk provided with annular, the diameter for reclaiming wind-guiding disk is less than the diameter of the annular film bubble extrusion；Return
Receive wind-guiding disk to be made up of the upper disc of annular and the lower disc of annular, upper disc and lower disc are enclosed on the discharge pipe
Periphery；Upper disc and lower disc are formed with the recovery wind guide chamber of annular after above-below direction clamping, upper disc and lower disc
The recovery wind-guiding for leaving gap between outer edge and being formed as annular is stitched；Reclaiming many water are additionally provided with inside wind-guiding disk
Recovery levels guide duct, many vertically extending vertical wind-guiding tubules square to extension；Each recovery levels guide duct with return
In the distribution of homogeneous radiation shape centered on the center of circle of receipts wind-guiding disk, the central axis bearing of trend of each recovery levels guide duct is
Reclaim the radial direction of wind-guiding disk；The quantity of vertical wind-guiding tubule is identical with the quantity of recovery levels guide duct, vertical wind-guiding tubule
Arrangement alternate with recovery levels guide duct, the floor projection position of every vertical wind-guiding tubule is located at corresponding adjacent two recovery
In sector region between horizontal guide duct；The distal end of every recovery levels guide duct directly connects with the recovery wind guide chamber
Logical, the tube chamber of the proximal part of every recovery levels guide duct directly with the discharge pipe is connected；Every vertical wind-guiding tubule it is upper
End is directly connected with second annular chamber, and the lower end of every vertical wind-guiding tubule is directly connected with total air intake passage.
2. internal cooling structure for multilayer co-extrusion film blowing machine according to claim 1, it is characterised in that it is characterized in that：Vertical wind-guiding tubule
It is vertical that the vertical antarafacial of antarafacial is constituted with corresponding two adjacent recovery levels guide ducts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710384342.1A CN107053648B (en) | 2017-05-26 | 2017-05-26 | Upward type internal cooling structure for multilayer co-extrusion film blowing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710384342.1A CN107053648B (en) | 2017-05-26 | 2017-05-26 | Upward type internal cooling structure for multilayer co-extrusion film blowing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107053648A true CN107053648A (en) | 2017-08-18 |
| CN107053648B CN107053648B (en) | 2018-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710384342.1A Active CN107053648B (en) | 2017-05-26 | 2017-05-26 | Upward type internal cooling structure for multilayer co-extrusion film blowing machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN107053648B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109605720A (en) * | 2018-04-21 | 2019-04-12 | 广东金明精机股份有限公司 | Plastic film blowing machine inner-cooling structure |
| CN112959571A (en) * | 2021-02-04 | 2021-06-15 | 深圳弘臻新材料科技有限公司 | Temperature control air disc for primary forming in PVC heat-shrinkable tube production process |
| CN114474771A (en) * | 2021-12-31 | 2022-05-13 | 无锡倍加德机械科技有限公司 | Multilayer co-extrusion film blowing system for excellent film forming |
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| US4955802A (en) * | 1988-06-16 | 1990-09-11 | Reifenhauser Gmbh & Co. Maschinenfabrik | Blow-extruding a multilayer synthetic-resin tube |
| US6068462A (en) * | 1997-12-02 | 2000-05-30 | Brampton Engineering, Inc. | Apparatus for continuously forming a blown film |
| CN201192897Y (en) * | 2008-04-02 | 2009-02-11 | 詹文聪 | Cooling air ring of bag blowing machine |
| CN204183891U (en) * | 2014-10-25 | 2015-03-04 | 广东金明精机股份有限公司 | The cooling vane of film blowing device |
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2017
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4955802A (en) * | 1988-06-16 | 1990-09-11 | Reifenhauser Gmbh & Co. Maschinenfabrik | Blow-extruding a multilayer synthetic-resin tube |
| US6068462A (en) * | 1997-12-02 | 2000-05-30 | Brampton Engineering, Inc. | Apparatus for continuously forming a blown film |
| CN201192897Y (en) * | 2008-04-02 | 2009-02-11 | 詹文聪 | Cooling air ring of bag blowing machine |
| CN204183891U (en) * | 2014-10-25 | 2015-03-04 | 广东金明精机股份有限公司 | The cooling vane of film blowing device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109605720A (en) * | 2018-04-21 | 2019-04-12 | 广东金明精机股份有限公司 | Plastic film blowing machine inner-cooling structure |
| CN109605720B (en) * | 2018-04-21 | 2020-11-03 | 广东金明精机股份有限公司 | Inner cooling structure of plastic film blowing machine |
| CN112959571A (en) * | 2021-02-04 | 2021-06-15 | 深圳弘臻新材料科技有限公司 | Temperature control air disc for primary forming in PVC heat-shrinkable tube production process |
| CN114474771A (en) * | 2021-12-31 | 2022-05-13 | 无锡倍加德机械科技有限公司 | Multilayer co-extrusion film blowing system for excellent film forming |
| CN114474771B (en) * | 2021-12-31 | 2023-09-15 | 无锡倍加德机械科技有限公司 | Multilayer co-extrusion film blowing system for excellent film forming |
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| Publication number | Publication date |
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| CN107053648B (en) | 2018-12-21 |
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