CN217514509U - Film blowing equipment cooling air ring capable of locally adjusting thickness of film bubble - Google Patents
Film blowing equipment cooling air ring capable of locally adjusting thickness of film bubble Download PDFInfo
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- CN217514509U CN217514509U CN202220216760.6U CN202220216760U CN217514509U CN 217514509 U CN217514509 U CN 217514509U CN 202220216760 U CN202220216760 U CN 202220216760U CN 217514509 U CN217514509 U CN 217514509U
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- film bubble
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- 238000001816 cooling Methods 0.000 title claims abstract description 31
- 238000010096 film blowing Methods 0.000 title claims abstract description 11
- 239000011229 interlayer Substances 0.000 claims abstract description 25
- 238000005192 partition Methods 0.000 claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 239000010410 layer Substances 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 7
- 239000012768 molten material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
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Abstract
A cooling air ring of film blowing equipment capable of locally adjusting thickness of a film bubble comprises an annular main air duct and an annular air outlet, wherein the annular main air duct is located on the outer side, the annular air outlet is located on the inner side, a main air inlet is formed in the annular main air duct, an annular air guide interlayer is arranged between the annular main air duct and the annular air outlet and provided with an interlayer top plate and an interlayer bottom plate, 24-72 vertical partition plates extending in the radial direction are uniformly arranged in the annular air guide interlayer, an air guide cavity channel is formed in the space of the annular air guide interlayer between every two adjacent vertical partition plates, the annular main air duct is communicated to the annular air outlet through each air guide cavity channel, each air guide cavity channel is correspondingly provided with a film bubble thickness adjusting part, the horizontal projection shape of each vertical partition plate is provided with a plurality of arc-shaped notches, and the radian of each arc-shaped notch is smaller than 180 degrees. The utility model discloses can realize that the cooling degree of the membrane bubble of each difference is even in each concrete membrane bubble position unit, membrane bubble thickness is even.
Description
Technical Field
The utility model belongs to the technical field of blown film equipment, especially, relate to a blown film equipment cooling wind ring of ability local regulation film bubble thickness.
Background
When the film blowing equipment works, the molten material is extruded from the gap of the circular ring-shaped die orifice of the machine head to form a circular ring-shaped film bubble, and meanwhile, pressure gas is blown into the film bubble, so that the film bubble is blown, and the larger the blowing degree is, the thinner the film bubble becomes. On the other hand, the temperature of the bubble during extrusion is high, so that cooling by means of a cooling air ring is required in order to finally shape the bubble. The cooling air ring comprises an annular main air duct and an annular air outlet, the annular main air duct is located on the outer side, the annular air outlet is located on the inner edge, a main air inlet is formed in the annular main air duct, an annular air guide interlayer is arranged between the annular main air duct and the annular air outlet, and the annular main air duct is communicated to the annular air outlet through the annular air guide interlayer. When the air cooling device works, cooling air flow enters the annular main air duct from the main air inlet and is blown to the annular air outlet through the annular air guide interlayer, and the annular air outlet is close to and faces the film bubble, so that the film bubble is cooled.
In the process of spreading and distributing, although people strive to ensure that the thickness and the pressure of the molten material are kept uniform at each point in the circumferential direction of the annular die gap, in practice, due to errors of mechanical equipment and the limitation of a distribution runner, the thicknesses of each point of a film bubble are difficult to be uniform in the circumferential direction when the molten material is extruded from the annular die gap, namely the thickness of the film bubble is nonuniform.
In order to solve the problem, the applicant designs a cooling air ring of a film blowing device capable of locally adjusting the thickness of a film bubble and applies a utility model patent with the patent number of ZL201420580220.1 to the national intellectual property office. This ability local adjustment film blowing equipment cooling air of bubble thickness evenly is equipped with 24 ~ 72 radially extending division boards of erectting in annular wind-guiding intermediate layer, and each erects the division board and is evenly radial distribution with the centre of a circle of cooling wind ring as the center, and every adjacent two erects and form a wind-guiding chamber way between the division board, and every wind-guiding chamber way corresponds and is equipped with a bubble thickness regulation and control part, and bubble thickness regulation and control part can be the electric heat piece, or adjusts the governing valve of wind-guiding chamber way telecentric ends (the one end of keeping away from the cooling wind ring centre of a circle promptly) open area. The bubble part corresponding to the circumferential position of each air guide cavity is called a bubble part unit. Therefore, the temperature or the air flow speed of the cooling air flow of each air guide cavity channel can be independently controlled, so that the temperature of each bubble part unit can be independently controlled, the inflation rate of each bubble part unit can be independently regulated and controlled, and the thickness of all different bubble part units can be balanced.
However, in production practice, the applicant has found that, although the above structure can achieve substantially the same average thickness of each of the different bubble site units, the following improvements remain: specifically, in each air guide cavity channel, the width of each air guide cavity channel is gradually reduced along the radial direction, that is, the horizontal projection shape of the air guide cavity channel has a taper, the air guide cavity channel is relatively long and narrow, and the side surface of the air guide cavity channel is a smooth metal surface, so that the wall attachment effect of the air flow is obvious, so that the air volume of the part close to the two side walls in each air guide cavity channel is obviously larger, that is, in each specific bubble part unit, the cooling degree of the bubble at each different point in the circumferential direction is not uniform (specifically, the cooling degree of the circumferential part close to the vertical partition plate in the circumferential direction is higher), and the bubble thickness still forms a difference.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem and providing a blown film equipment cooling wind ring of ability local regulation film bubble thickness, it realizes that the cooling degree of the film bubble of each difference is even in each concrete film bubble position unit, and film bubble thickness is even.
The purpose can be realized according to the following scheme: a film blowing equipment cooling air ring capable of locally adjusting the thickness of a film bubble comprises an annular main air duct positioned at the outer side and an annular air outlet positioned at the inner side, wherein the annular main air duct is provided with a main air inlet, an annular air guide interlayer is arranged between the annular main air duct and the annular air outlet and is provided with an interlayer top plate and an interlayer bottom plate, 24-72 vertical partition plates extending in the radial direction are uniformly arranged in the annular air guide interlayer, each vertical partition plate is uniformly and radially distributed by taking the circle center of the cooling air ring as the center, the space of the annular air guide interlayer between every two adjacent vertical partition plates forms an air guide cavity channel, namely, each vertical partition plate divides the annular air guide interlayer into 24-72 air guide cavity channels, the annular main air duct is communicated with the annular air outlet through each air guide cavity channel, and each air guide cavity channel is correspondingly provided with a film bubble thickness adjusting part, the horizontal projection shape of the vertical partition plate is provided with a plurality of circular arc-shaped notches, and the radian of each circular arc-shaped notch is less than 180 degrees.
The interlayer bottom plate is provided with a plurality of circular jacks, the number of the circular jacks corresponds to the number of the circular arc notches, the radius of each circular jack is equal to that of each circular arc notch, the horizontal projection center position of each circular jack is equal to that of the corresponding circular arc notch, and each circular jack is movably inserted with one cylindrical vertical rod.
The film bubble thickness regulating and controlling part is an electric heating block.
The film bubble thickness regulating and controlling part is a regulating valve for regulating the opening area of the far end of the air guide cavity.
The utility model has the advantages of it is following and effect:
one, the utility model discloses an erect the division board and have a plurality of convex breachs, the circular jack activity that convex breach corresponds can also further be inserted cylindrical pole setting when needs, the messenger erects the surperficial formation of division board and fluctuates, therefore the air current pastes when adhering to the surface operation of erectting the division board, can form the turbulent flow, thereby weaken the velocity of flow of erectting near the air current near the division board surface, it is big relatively to avoid erectting near the air flow of division board surface, consequently, can support and attach the wall effect, make the air current of same wind-guiding chamber way difference upwards to week more even, the cooling degree of finally realizing the membrane bubble of each difference in each concrete membrane bubble position unit is even, membrane bubble thickness is even.
The cylindrical vertical rods can be movably inserted, namely the cylindrical vertical rods can be inserted or pulled away when needed, the radian of each circular arc notch is smaller than 180 degrees, and therefore whether the cylindrical vertical rods are inserted or not can influence the fluctuation degree of the side surface of the air guide cavity, the number of the inserted cylindrical vertical rods can be changed through adjustment, the shape of the side surface of the air guide cavity can be changed, the airflow rate near the surface of the vertical partition plate can be changed, and different pressure conditions of the air guide cavity can be adapted. Specifically, for the film bubbles with different thicknesses and materials, because of different production process parameters, the pressures of the air guide channels may be different, and the influence degrees of the coanda effect caused by the gas with different pressures are different, the number of the cylindrical vertical rods actually inserted needs to be adjusted and changed, and the fluctuation degree of the side surface of the air guide channel needs to be changed, so as to realize just offsetting the coanda effect.
Drawings
Fig. 1 is a schematic view of the structure and usage of an embodiment of the present invention (all cylindrical vertical rods are inserted into corresponding circular insertion holes).
Fig. 2 is a partially enlarged schematic view of a in fig. 1.
Fig. 3 is a schematic view of the vertical partition plate and the sandwich bottom plate of each annular air guiding sandwich shown in fig. 1.
Fig. 4 is a partially enlarged view of the structure shown in fig. 3.
Figure 5 is a schematic view of the structure of figure 3 with a portion of the cylindrical pole removed from the structure in a changed state.
Fig. 6 is a partially enlarged view of the structure shown in fig. 5.
Figure 7 is a schematic representation of the change in state after all the cylindrical uprights have been pulled out in figure 6.
Fig. 8 is a schematic view of a horizontal projection of the structure shown in fig. 7.
Fig. 9 is an enlarged view of part F of fig. 8.
Fig. 10 is a schematic view of the horizontal projection shape of the upright partition plate in fig. 9.
Fig. 11 is an enlarged schematic view of the section B-B in fig. 9.
Detailed Description
Fig. 1, fig. 2, fig. 3, fig. 4, fig. 10, and fig. 11 show a cooling air ring of a film blowing apparatus capable of locally adjusting the thickness of a film bubble, which includes an annular main air duct 1 located at the outer side and an annular air outlet 2 located at the inner side, the annular main air duct 1 is provided with a main air inlet, an annular air guiding interlayer is arranged between the annular main air duct 1 and the annular air outlet 2, the annular air guiding interlayer is provided with an interlayer top plate 31 and an interlayer bottom plate 32, 48 radially extending vertical partition plates 4 are uniformly arranged in the annular air guiding interlayer, each vertical partition plate 4 is uniformly and radially distributed with the center of the cooling air ring as the center, the space of the annular air guiding interlayer between each two adjacent vertical partition plates 4 forms an air guiding cavity channel 30, that is, each vertical partition plate 4 divides the annular air guiding interlayer into 48 air guiding cavity channels 30, the annular main air duct 1 is communicated with the annular air outlet 2 through each air guiding cavity channel 30, each air guide cavity 30 is correspondingly provided with a film bubble thickness regulating and controlling component which is an electric heating block 6. The horizontal projection shape of the vertical partition plate 4 has a plurality of circular arc notches 41, and the radian of each circular arc notch is less than 180 degrees (for example, the radian of an arc line CDE in fig. 10 is 120 degrees), as shown in fig. 10 and 11.
As shown in fig. 4, 9 and 10, the interlayer bottom plate 32 is provided with a plurality of circular jacks 7, the number of the circular jacks 7 is the same as the number of the circular arc notches 41, the radius of the circular jacks 7 is equal to the radius of the circular arc notches 41, the horizontal projection center position of each circular jack 7 is the same as the horizontal projection center position of the corresponding circular arc notch 41, and each circular jack 7 is movably inserted with one cylindrical upright rod 8.
In the use process of the embodiment, cooling air flow enters the annular main air duct 1 from the main air inlet, then is blown to the annular air outlet 2 through each air guide cavity duct 30 of the annular air guide interlayer, and then the annular air outlet 2 is blown to the film bubble 80, so that the film bubble 80 is cooled. For the film bubbles with different materials and thicknesses, the pressure and the flow rate of cooling air flow are different, so that the fluctuation degree of the side surface of the air guide cavity 30 can be changed by adjusting and changing the number of the cylindrical vertical rods 8 actually inserted according to requirements, and the coanda effect can be just counteracted. For example, all the cylindrical uprights 8 can be inserted in the corresponding circular receptacles 4, as shown in fig. 3, 4, only part of the cylindrical uprights 8 can be inserted in the corresponding circular receptacles 4, as shown in fig. 5, 6, or all the cylindrical uprights 8 can be pulled off, as shown in fig. 7, 8, 9.
In the above embodiment, the number of the vertical partition plates in the annular air guiding sandwich layer may be 24 vertical partition plates (or 72 vertical partition plates), and the number of the corresponding air guiding channels 30 is 24 (or 72 vertical partition plates).
In the above embodiment, the bubble thickness adjusting and controlling part may be a regulating valve for regulating the opening area of the far end of the air guide channel.
Claims (4)
1. The utility model provides a can local blown film equipment cooling wind ring of adjusting film bubble thickness, including the annular main wind channel that is located the outside, the annular air outlet that is located the inboard, annular main wind channel is equipped with total air intake, be equipped with annular wind-guiding intermediate layer between annular main wind channel and the annular air outlet, annular wind-guiding intermediate layer is equipped with intermediate layer roof and intermediate layer bottom plate, evenly be equipped with 24 ~ 72 radially extended division boards of erectting in annular wind-guiding intermediate layer, each erects the division board and is evenly radial distribution with the centre of a circle of cooling wind ring as the center, the annular wind-guiding intermediate layer's between every adjacent two erects division boards space forms a wind-guiding chamber way, annular main wind channel communicates annular air outlet through each wind-guiding chamber way, every wind-guiding chamber way corresponds and is equipped with a film bubble thickness regulation and control part, the characteristic of the utility model is that: the horizontal projection shape of the vertical partition plate is provided with a plurality of circular arc-shaped notches, and the radian of each circular arc-shaped notch is less than 180 degrees.
2. The film blowing equipment cooling air ring capable of locally adjusting the thickness of the film bubble according to claim 1, characterized in that: the interlayer bottom plate is provided with a plurality of circular jacks, the number of the circular jacks corresponds to the number of the circular arc notches, the radius of each circular jack is equal to that of each circular arc notch, the horizontal projection center position of each circular jack is equal to that of the corresponding circular arc notch, and each circular jack is movably inserted with one cylindrical vertical rod.
3. The cooling air ring of the film blowing equipment capable of locally adjusting the thickness of the film bubble according to claim 1 or 2, wherein: the film bubble thickness regulating and controlling part is an electric heating block.
4. The cooling air ring of the film blowing equipment capable of locally adjusting the thickness of the film bubble according to claim 1 or 2, wherein: the film bubble thickness regulating and controlling part is a regulating valve for regulating the opening area of the far end of the air guide cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220216760.6U CN217514509U (en) | 2022-01-26 | 2022-01-26 | Film blowing equipment cooling air ring capable of locally adjusting thickness of film bubble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220216760.6U CN217514509U (en) | 2022-01-26 | 2022-01-26 | Film blowing equipment cooling air ring capable of locally adjusting thickness of film bubble |
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| Publication Number | Publication Date |
|---|---|
| CN217514509U true CN217514509U (en) | 2022-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220216760.6U Active CN217514509U (en) | 2022-01-26 | 2022-01-26 | Film blowing equipment cooling air ring capable of locally adjusting thickness of film bubble |
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| Country | Link |
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| CN (1) | CN217514509U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118144255A (en) * | 2024-05-07 | 2024-06-07 | 张家港禾福新材料科技有限公司 | Film blowing device and film local point thickness differential regulation and control method |
-
2022
- 2022-01-26 CN CN202220216760.6U patent/CN217514509U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118144255A (en) * | 2024-05-07 | 2024-06-07 | 张家港禾福新材料科技有限公司 | Film blowing device and film local point thickness differential regulation and control method |
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