CN212528673U - Cooling water ring of down-blowing film blowing machine - Google Patents
Cooling water ring of down-blowing film blowing machine Download PDFInfo
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- CN212528673U CN212528673U CN202020982517.6U CN202020982517U CN212528673U CN 212528673 U CN212528673 U CN 212528673U CN 202020982517 U CN202020982517 U CN 202020982517U CN 212528673 U CN212528673 U CN 212528673U
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Abstract
A cooling water ring of a down-blowing film blowing machine comprises an annular water tank, wherein the annular water tank is provided with a first water inlet channel; an annular water cavity is also arranged below the annular water tank, and an annular negative pressure air cavity is also arranged below the annular water cavity; the annular water cavity is provided with an outer annular wall of the water cavity and an inner annular wall of the water cavity, and the annular water cavity is provided with a second water inlet channel; the top end of the inner annular wall of the water cavity is provided with an annular water outlet seam; the annular negative pressure air cavity is also provided with an inner annular wall of the air cavity and an outer annular wall of the air cavity; the bottom of the annular negative pressure air cavity is provided with a water outlet, and the inner annular wall of the air cavity is made of porous materials; the inner annular wall of the water cavity is made of two layers of annular metal plates which are sleeved with each other from inside to outside, the two layers of annular metal plates are respectively an inner layer annular metal plate and an outer layer annular metal plate, and a spiral water flow channel is formed at the junction of the two layers of annular metal plates; one end of the spiral water flow channel is connected with a water inlet pipe, and the other end of the spiral water flow channel is connected with a water outlet pipe. The utility model discloses cooling rate is high, is suitable for the higher or thick membrane bubble of thickness of production extrusion speed.
Description
Technical Field
The utility model belongs to the technical field of plastics blown film equipment, concretely relates to cooling water ring of lower blowing formula blown film machine.
Background
In the production process of the down-blowing film blowing machine, the molten material is just extruded to form a high-temperature annular film bubble, the annular film bubble continuously moves downwards, and the outer surface of the annular film bubble must be cooled by cooling water.
The cooling water ring of the existing blowing film machine is provided with an annular inner wall and an annular water tank, the top end section of the annular inner wall is used as the inner tank wall of the annular water tank, the annular water tank is also provided with an outer tank wall and an annular water bottom plate, the top edge of the annular outer tank wall is higher than the top edge of the annular inner tank wall, the tank cavity of the annular water tank is open upwards, and the annular water tank is communicated with a water inlet channel.
When the device works, the film bubble passes through the center of the annular inner wall and continuously descends; external water continuously enters the annular water tank through the water inlet channel, the water in the annular water tank overflows the upper edge of the annular inner wall (namely overflows the inner wall of the annular water tank), and an annular water curtain is formed at the periphery of the membrane bubble, so that the annular membrane bubble can be cooled.
However, the conventional upper cooling water circulation structure is only suitable for the conditions of low production speed (namely, low bubble extrusion speed) and thin bubble thickness, but not suitable for the conditions of high production speed or thick bubble thickness. This is because the bubble moves downward close to the annular inner wall, so the temperature of the annular inner wall is gradually affected by the bubble to increase the temperature, and further the cooling capacity and cooling speed of the annular water curtain on the bubble are affected, when the bubble production speed is high (the bubble extrusion speed is high) or the bubble thickness is thick, the cooling capacity and cooling speed of the upper cooling water ring structure cannot be matched, that is, the high-temperature annular bubble cannot be effectively cooled in time.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned shortcoming and provide a cooling water ring of down blown film machine, its cooling rate is high, is suitable for the higher or thicker film bubble of thickness of production extrusion speed.
The purpose can be realized according to the following scheme: a cooling water ring of a down-blowing film blowing machine comprises an annular water tank, wherein the annular water tank is provided with an annular outer tank wall, an annular water tank bottom plate and an annular inner tank wall, a tank cavity of the annular water tank is opened upwards, the top edge of the annular outer tank wall is higher than the top edge of the annular inner tank wall, and the annular water tank is provided with a first water inlet channel; the device is characterized in that an annular water cavity is also arranged below the annular water tank, and an annular negative pressure air cavity is also arranged below the annular water cavity; the annular water cavity is provided with an outer annular wall of the water cavity and an inner annular wall of the water cavity, and the annular water cavity is provided with a second water inlet channel; the top end of the inner annular wall of the water cavity is provided with an annular water outlet seam; the annular negative pressure air cavity is also provided with an inner annular wall of the air cavity and an outer annular wall of the air cavity, and the annular negative pressure air cavity is provided with an air exhaust port connected with an external negative pressure generating component; the bottom of the annular negative pressure air cavity is provided with a water outlet, and the inner annular wall of the air cavity is made of porous materials; the inner annular wall of the water cavity is made of two layers of annular metal plates which are sleeved with each other from inside to outside, the two layers of annular metal plates are respectively an inner layer annular metal plate and an outer layer annular metal plate, and a spiral water flow channel is formed at the junction of the two layers of annular metal plates; one end of the spiral water flow channel is connected with a water inlet pipe, and the other end of the spiral water flow channel is connected with a water outlet pipe.
A spiral groove is formed on the outer surface of the inner layer annular metal plate; when the inner and outer layers of annular metal plates are assembled, the spiral groove forms the spiral water flow channel.
The inner annular wall of the air cavity comprises an inner layer and an outer layer, the outer layer is a porous plate made of rigid materials, and the inner layer is breathable fabric made of flexible materials.
The utility model has the advantages of it is following and effect:
firstly, the utility model discloses during operation, the water curtain that not only the annular water trough formed can implement the cooling to the membrane bubble，The water outlet seam of the annular water cavity can also flow out of the annular water curtain to cool the film bubble; moreover, the low-temperature cooling water can be introduced into the spiral water flow channel to cool the inner annular wall of the water cavity (particularly the inner annular metal plate), so that the cooling capacity and the cooling speed are improved, and the temperature of the film bubble attached to the inner annular metal plate is effectively reduced.
When the film bubble moves beside the annular negative pressure air cavity, the water flowing out of the annular water tank and the annular water cavity can be timely sucked away by the inner annular wall of the air cavity, and water drops are prevented from being accumulated when the plastic film is rolled.
Drawings
Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.
Fig. 2 is a partial schematic view of B in fig. 1.
Fig. 3 is a partial schematic view of a in fig. 1.
Fig. 4 is a front view structure diagram of the inner layer annular metal plate.
Fig. 5 is a schematic diagram of the operation of the embodiment shown in fig. 1.
Detailed Description
As shown in fig. 1, 2 and 3, the cooling water ring of the bottom blowing film blowing machine comprises an annular water tank 1, wherein the annular water tank 1 is provided with an annular outer tank wall 11, an annular water tank bottom plate 12 and an annular inner tank wall 13, a tank cavity of the annular water tank 1 is opened upwards, a top edge of the annular outer tank wall 11 is higher than a top edge of the annular inner tank wall 13, and the annular water tank 1 is provided with a first water inlet channel 10; an annular water cavity 2 is also arranged below the annular water tank 1, and an annular negative pressure air cavity 3 is also arranged below the annular water cavity 2; the annular water cavity 2 is provided with an outer water cavity ring wall 21 and an inner water cavity ring wall 22, and the annular water cavity is provided with a second water inlet channel 20; the top end of the inner annular wall 22 of the water cavity is provided with an annular water outlet seam 23;
as shown in fig. 1 and 3, the annular negative pressure air cavity 3 is further provided with an air cavity outer annular wall 31 and an air cavity inner annular wall 32, and the annular negative pressure air cavity 3 is provided with an air suction port 33 connected with an external negative pressure generating component; the bottom of the air cavity is provided with a water outlet 30; the inner annular wall 32 of the air cavity is made of porous material and comprises an inner layer and an outer layer, wherein the outer layer is a porous plate 322 made of rigid material, and the inner layer is a wool felt 321 (the wool felt belongs to porous breathable fabric made of flexible material).
As shown in fig. 1 and 2, the inner annular wall 22 of the water cavity is made of two annular metal plates sleeved inside and outside, the two annular metal plates are respectively an inner annular metal plate 221 and an outer annular metal plate 222, and a spiral water flow channel 24 is formed at the junction of the two annular metal plates; wherein, the outer surface of the inner layer annular metal plate 221 of the inner annular wall of the water cavity is formed with a spiral groove 240 (as shown in fig. 4), when the inner and outer layer annular metal plates are assembled, the spiral groove 240 is formed into the spiral water flow channel 24, one end of the spiral water flow channel 24 is connected with the water inlet pipe 25, and the other end is connected with the water outlet pipe 26.
When the embodiment works, the circular film bubble 8 runs downwards and vertically penetrates through the middle of the circular water tank 1, the middle of the circular water cavity 2 and the middle of the circular negative pressure air cavity 3, a water curtain formed by the circular water tank 1 can cool the film bubble 8, and the water outlet seam 23 of the circular water cavity can flow out of the circular water curtain to cool the film bubble 8; furthermore, the inner annular wall 22 of the water cavity (especially the inner annular metal plate 221) can be cooled by introducing low-temperature cooling water into the spiral water flow channel 24, as shown by the arrows in fig. 5, which is further beneficial to increasing the cooling capacity and the cooling speed, so that the temperature of the film bubble attached to the inner annular metal plate 221 is effectively reduced. When the film bubble moves to the side of the annular negative pressure air cavity 3, the water flowing out of the annular water tank and the annular water cavity is sucked away by the inner annular wall 32 of the air cavity in time, as shown by an arrow in fig. 5, and water drops are prevented from being accumulated when the plastic film is rolled.
Claims (3)
1. A cooling water ring of a down-blowing film blowing machine comprises an annular water tank, wherein the annular water tank is provided with an annular outer tank wall, an annular water tank bottom plate and an annular inner tank wall, a tank cavity of the annular water tank is opened upwards, the top edge of the annular outer tank wall is higher than the top edge of the annular inner tank wall, and the annular water tank is provided with a first water inlet channel; the device is characterized in that an annular water cavity is also arranged below the annular water tank, and an annular negative pressure air cavity is also arranged below the annular water cavity; the annular water cavity is provided with an outer annular wall of the water cavity and an inner annular wall of the water cavity, and the annular water cavity is provided with a second water inlet channel; the top end of the inner annular wall of the water cavity is provided with an annular water outlet seam; the annular negative pressure air cavity is also provided with an inner annular wall of the air cavity and an outer annular wall of the air cavity, and the annular negative pressure air cavity is provided with an air exhaust port connected with an external negative pressure generating component; the bottom of the annular negative pressure air cavity is provided with a water outlet, and the inner annular wall of the air cavity is made of porous materials; the inner annular wall of the water cavity is made of two layers of annular metal plates which are sleeved with each other from inside to outside, the two layers of annular metal plates are respectively an inner layer annular metal plate and an outer layer annular metal plate, and a spiral water flow channel is formed at the junction of the two layers of annular metal plates; one end of the spiral water flow channel is connected with a water inlet pipe, and the other end of the spiral water flow channel is connected with a water outlet pipe.
2. The cooling water ring of the lower blowing type film blowing machine according to claim 1, characterized in that: a spiral groove is formed on the outer surface of the inner layer annular metal plate of the inner annular wall of the water cavity; when the inner and outer layers of annular metal plates are assembled, the spiral groove forms the spiral water flow channel.
3. The cooling water ring of the lower blowing type film blowing machine according to claim 1, characterized in that: the inner annular wall of the air cavity comprises an inner layer and an outer layer, the outer layer is a porous plate made of rigid materials, and the inner layer is breathable fabric made of flexible materials.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020982517.6U CN212528673U (en) | 2020-06-02 | 2020-06-02 | Cooling water ring of down-blowing film blowing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020982517.6U CN212528673U (en) | 2020-06-02 | 2020-06-02 | Cooling water ring of down-blowing film blowing machine |
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| CN212528673U true CN212528673U (en) | 2021-02-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114770902A (en) * | 2022-04-29 | 2022-07-22 | 福建连众智惠实业有限公司 | Vacuum water ring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114770902A (en) * | 2022-04-29 | 2022-07-22 | 福建连众智惠实业有限公司 | Vacuum water ring system |
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