CN211138068U - Vacuum devolatilization device - Google Patents
Vacuum devolatilization device Download PDFInfo
- Publication number
- CN211138068U CN211138068U CN201921980380.4U CN201921980380U CN211138068U CN 211138068 U CN211138068 U CN 211138068U CN 201921980380 U CN201921980380 U CN 201921980380U CN 211138068 U CN211138068 U CN 211138068U
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- CN
- China
- Prior art keywords
- vacuum
- screw extruder
- pulse airflow
- vacuum tube
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The application discloses device is waved in vacuum takes off installs in double screw extruder barrel, including communicate in the vacuum tube at double screw extruder barrel top, vacuum tube one side is formed with the blast pipe, the blast pipe is close to pulse airflow entry has been seted up to vacuum tube department, the blast pipe in pulse airflow entry below has seted up the pulse airflow export. The utility model discloses increased the pulse air current in gas vent department, ensured that the desublimation thing is discharged smoothly, can not flow back the vacuum mouth, can not block up the gas vent yet.
Description
Technical Field
The application relates to production of a double-screw extruder, in particular to a vacuum devolatilization device.
Background
Vacuum devolatilization is an essential step in the modification process of plastic raw materials, and a device for vacuum devolatilization is also essential. In the prior art, vacuum devolatilization is mainly realized by opening a vacuum devolatilization port at the upper part of a screw cylinder of an extruder and using a vacuum devolatilization plug-in unit. The vacuum devolatilization plug-in unit and the vacuum devolatilization port are fixed through screws, and the vacuum devolatilization plug-in unit is provided with an exhaust port.
In the production, one part of devolatilization is discharged in a gas form, and the other part of devolatilization is subjected to condensation bloom on an exhaust port of the devolatilization insert, so that when the amount of the desublimation is too large, the desublimation flows back into a vacuum devolatilization port or blocks the exhaust port, thereby causing quality hidden troubles.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a vacuum devolatilization device to overcome the blockage problem.
In order to achieve the above object, the present invention provides the following technical solutions.
The embodiment of the application discloses device is waved in vacuum takes off installs in double screw extruder barrel, including communicate in the vacuum tube at double screw extruder barrel top, vacuum tube one side is formed with the blast pipe, the blast pipe is close to pulse airflow entry has been seted up to vacuum tube department, the blast pipe in pulse airflow entry below has seted up the pulse airflow export.
Preferably, in the vacuum devolatilization apparatus described above, an interface is formed outside the pulsed airflow inlet, and the interface is connected to the pulsed airflow.
More preferably, in the vacuum devolatilization apparatus described above, the pulsed gas stream is blown once every 3 to 5 min.
Preferably, in the vacuum devolatilization device, the bottom of the vacuum tube is fixedly connected with the screw cylinder of the twin-screw extruder by screws.
Compared with the prior art, the utility model has the advantages of: the pulse airflow is added at the air outlet, so that the desublimated substances are ensured to be smoothly discharged, the desublimated substances do not flow back to the vacuum port, and the air outlet is not blocked.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of a vacuum devolatilization apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
With reference to fig. 1, the vacuum devolatilization device is installed on a barrel 1 of a twin-screw extruder, and comprises a vacuum tube 2 communicated with the top of the barrel 1 of the twin-screw extruder, wherein an exhaust tube 3 is formed on one side of the vacuum tube 2, a pulse airflow inlet 6 is formed at the position of the exhaust tube 3 close to the vacuum tube 2, and a pulse airflow outlet 4 is formed below the pulse airflow inlet 6 of the exhaust tube 3. The pulse airflow inlet 6 is externally provided with a port 5, and the port 5 is connected with pulse airflow. The pulse airflow is sprayed once every 3-5 min. The bottom of the vacuum tube 2 is fixedly connected with the screw cylinder 1 of the double-screw extruder through screws.
In actual production, the devolatilized product is produced from the screw cylinder and is discharged through the vacuum port and the exhaust port, and the desublimated product is discharged by injecting the pulsed air flow once every several minutes.
After the pulse airflow is used for air injection, no desublimation substances exist in an exhaust port, and the quality is still stable after continuous production for hundreds of hours.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (4)
1. A vacuum devolatilization device is arranged on a screw barrel of a double-screw extruder and is characterized by comprising a vacuum tube communicated with the top of the screw barrel of the double-screw extruder, wherein an exhaust tube is formed on one side of the vacuum tube, a pulse airflow inlet is formed at the position, close to the vacuum tube, of the exhaust tube, and a pulse airflow outlet is formed below the pulse airflow inlet of the exhaust tube.
2. The vacuum devolatilizer as claimed in claim 1, wherein an interface is formed outside said pulsed air flow inlet, said interface being connected to a pulsed air flow.
3. The vacuum devolatilizer as claimed in claim 2 wherein said pulsed gas stream is sparged once every 3-5 min.
4. The vacuum devolatilization apparatus as claimed in claim 1, wherein the bottom of said vacuum tube is fixed to said barrel of said twin-screw extruder by screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921980380.4U CN211138068U (en) | 2019-11-16 | 2019-11-16 | Vacuum devolatilization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921980380.4U CN211138068U (en) | 2019-11-16 | 2019-11-16 | Vacuum devolatilization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211138068U true CN211138068U (en) | 2020-07-31 |
Family
ID=71773428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921980380.4U Expired - Fee Related CN211138068U (en) | 2019-11-16 | 2019-11-16 | Vacuum devolatilization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211138068U (en) |
-
2019
- 2019-11-16 CN CN201921980380.4U patent/CN211138068U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200731 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |