CN214645785U - Melt exhaust device for film blowing of screw extruder - Google Patents
Melt exhaust device for film blowing of screw extruder Download PDFInfo
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- CN214645785U CN214645785U CN202120892827.3U CN202120892827U CN214645785U CN 214645785 U CN214645785 U CN 214645785U CN 202120892827 U CN202120892827 U CN 202120892827U CN 214645785 U CN214645785 U CN 214645785U
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- vacuum exhaust
- screw extruder
- exhaust apparatus
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Abstract
The utility model relates to a blowing equipment technical field, concretely relates to screw extruder is fuse-element exhaust apparatus for blown film. The utility model discloses an extruder, the extruder output is provided with fuse-element vacuum exhaust apparatus through duct connections, fuse-element vacuum exhaust apparatus top is provided with a plurality of gas vents, it is provided with the blast pipe to connect on the gas vent, blast pipe one end is provided with the vacuum pump, fuse-element vacuum exhaust apparatus bottom is connected and is provided with the fuse-element pump, the fuse-element pump is connected and is provided with the inflation film manufacturing head, inflation film manufacturing head top is provided with the fan. The utility model discloses rational in infrastructure, simple, the simple operation can guarantee better through the quality and the thickness homogeneity of blown film aircraft nose shaping film.
Description
Technical Field
The utility model relates to a blowing equipment technical field, concretely relates to screw extruder is fuse-element exhaust apparatus for blown film.
Background
The PVC heat-shrinkable label film is an important component of a shrinkable sleeve label and is mainly applied to shrink labels for packaging containers of drinks, seasonings, daily chemicals and the like. At present, a PVC thermal contraction label film is directly processed and blow molded by powder, a single screw extruder is mostly adopted for powder plasticization, a barrier type screw with a mixing head is adopted for the extruder, the length-diameter ratio of the barrier type screw is generally 26.5:1 or 29:1, and the mixing head and the barrier section are added in a homogenizing section on the basis of a common three-section type single screw structure. Through the barrier section and the mixing head structure, the molten materials are further plasticized and mixed, and finally the melt is output in a balanced manner and enters the film blowing machine head to ensure the quality of the formed film.
The barrier type single-screw extruder is adopted to process and produce the PVC heat-shrinkable label film, although the requirements of film production and product quality can be basically met, the following problems also exist:
firstly, because the traditional single-screw extruder is not provided with an exhaust device, volatile matters and decomposition products generated in the process of extruding, melting and plasticizing materials cannot be removed, so that the problem of bubbles on the film surface is easily caused, and in severe cases, the failure of blow molding can be caused.
In addition, because the single-screw extruder is used for gravity automatic blanking and dragging type extrusion conveying, the extrusion output quantity of the single-screw extruder has certain fluctuation, and the thickness difference of the thin film in the film blowing process can be caused.
The above problems are problems that the art needs to solve.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a screw extruder is fuse-element exhaust apparatus for blown film to can improve the effect of blowing.
In order to solve the technical problem, the utility model provides a scheme is: the utility model provides a screw extruder is fuse-element exhaust apparatus for blown film, includes the extruder, the extruder output is provided with fuse-element vacuum exhaust apparatus through duct connections, fuse-element vacuum exhaust apparatus top is provided with a plurality of gas vents, the connection is provided with the blast pipe on the gas vent, blast pipe one end is provided with the vacuum pump, fuse-element vacuum exhaust apparatus bottom is connected and is provided with the fuse-element pump, the fuse-element pump connection is provided with the blown film aircraft nose, blown film machine head top is provided with the wind ring.
As a further improvement of the utility model, the inner diameter of the melt vacuum exhaust device is larger than the inner diameter of the conveying pipe.
As a further improvement of the utility model, a filtering device is arranged on the conveying pipe.
As a further improvement, the inside squirrel-cage agitator that is provided with of fuse-element vacuum exhaust apparatus, fuse-element vacuum exhaust apparatus outside is provided with the drive the rotatory motor of squirrel-cage agitator.
As a further improvement of the utility model, a temperature control heating device is arranged on the melt vacuum exhaust device.
The utility model has the advantages that:
the utility model has the advantages of reasonable and simple structure, the simple operation, the PVC fuse-element is extruded to the extruder, carries to fuse-element vacuum exhaust apparatus in through the conveyer pipe, and fuse-element vacuum exhaust apparatus passes through the vacuum pump along the blast pipe with the gas in its inside fuse-element and discharges, and the fuse-element of degasification is carried into the melt pump, carries out blow molding with the fuse-element through the blown film aircraft nose at last. The melt pump can ensure the stability of melt flow and pressure, and can better ensure the quality and thickness uniformity of a film formed by the film blowing machine head.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1. an extruder; 2. a delivery pipe; 3. a melt vacuum exhaust device; 4. an exhaust port; 5. an exhaust pipe; 6. a melt pump; 7. a film blowing machine head; 8. a wind ring; 9. a filtration device; 10. a squirrel cage mixer; 11. a motor; 12. a vacuum pump.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1, for the utility model discloses an embodiment, including extruder 1, extruder 1 output is provided with fuse-element vacuum exhaust apparatus 3 through the connection of conveyer pipe 2, and fuse-element vacuum exhaust apparatus 3 top is provided with a plurality of gas vents 4, connects on the gas vent 4 to be provided with blast pipe 5, and 5 one ends of blast pipe are provided with vacuum pump 12, and 3 bottoms of fuse-element vacuum exhaust apparatus are connected and are provided with fuse-element pump 6, and fuse-element pump 6 is connected and is provided with blown film aircraft nose 7, and blown film aircraft nose 7 top is provided with wind ring 8. The extruder 1 extrudes PVC melt, and the PVC melt is conveyed into a melt vacuum exhaust device 3 through a conveying pipe 2, the melt vacuum exhaust device 3 exhausts gas in the melt from an exhaust port 4 along an exhaust pipe 5 through a vacuum pump 12, the melt with the gas removed is conveyed into a melt pump 6, and finally the melt is subjected to blow molding through a film blowing machine head 7. The melt pump 6 can ensure the stability of melt flow and pressure, and can better ensure the quality and thickness uniformity of a film formed by the film blowing machine head 7.
In this embodiment, the inner diameter of the melt vacuum exhaust device 3 is larger than the inner diameter of the conveying pipe 2, so that the melt pressure is released, and the gas in the melt is conveniently released to the surface of the melt, thereby being convenient for exhausting the gas in the melt to the outside of the melt.
In this embodiment, the conveying pipe 2 is provided with a filtering device 9, which can filter impurities in the melt.
In this embodiment, a squirrel-cage stirrer 10 is arranged inside the melt vacuum exhaust device 3, a motor 11 for driving the squirrel-cage stirrer 10 to rotate is arranged outside the melt vacuum exhaust device 3, and the squirrel-cage stirrer 10 is driven to rotate by the motor 11, so that a melt film with a sufficient area can be formed on the squirrel-cage stirrer 10, and gas and small molecular substances in the melt can be conveniently exhausted from the melt.
In this embodiment, a temperature control heating device is arranged on the melt vacuum exhaust device 3, and the melt vacuum exhaust device 3 and the pipeline connected with the melt pump 6 can be heated, so that the temperature of the melt inside the melt vacuum exhaust device 3 is maintained, meanwhile, the temperature required by the melt flowing in the pipeline is maintained, and the stability of the whole work is improved.
During actual work, when the PVC heat shrinkable film is once blown to the production PVC powder single bubble and is shaped, the footpath of rolling over of PVC heat shrinkable film is 1250mm, and thickness is 0.03mm, the shrinkage factor: 30-35% in transverse direction and 10-15% in longitudinal direction.
The proper type is selected, the inner diameter of the extruder 1 is phi 90, the screw is a three-section barrier type gradual-change screw with a mixing head, the length-diameter ratio is 26.5:1, and the extrusion capacity of PVC powder is 80-100 kg/h. The film blowing machine head 7 is a mandrel type machine head with a damping block, the diameter of a neck ring mold is phi 180mm, and the gap between die lips is 1.1 mm. The melt vacuum exhaust device 3 has the length of 0.5m and the inner diameter of phi 125, and adopts a 4-level squirrel cage stirrer 10. The inner diameter of the conveying pipe 2 is 35mm, the number of the exhaust ports 4 is 2, and the diameter phi is 50 mm. The vacuum pump 12 adopts a Roots water ring vacuum unit, the pumping speed is 70L/S, the limit pressure of the water ring pump is 67-25Pa, and the limit pressure of the oil ring pump is 0.8 Pa. The melt pump 6 is an MP rubber extrusion melt pump suitable for high-viscosity polymers, the rotary displacement is 50cc/r, the inlet pressure is 3.0-3.2MPa, and the outlet pressure is 12-15 MPa. The PVC powder is extruded by an extruder 1, the melt is filtered by a filtering device 9 and then conveyed into a melt vacuum exhaust device 3 along a conveying pipe 2, the melt in the PVC powder is stirred by a stage squirrel cage stirrer 10, the gas in the melt is discharged to the outside by a vacuum pump 12, and the melt with the gas removed flows into a film blowing machine head 7 through a melt pump 6 for blow molding.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (5)
1. The utility model provides a screw extruder is fuse-element exhaust apparatus for blown film, a serial communication port, including extruder (1), extruder (1) output is provided with fuse-element vacuum exhaust apparatus (3) through conveyer pipe (2) connection, fuse-element vacuum exhaust apparatus (3) top is provided with a plurality of gas vents (4), it is provided with blast pipe (5) to connect on gas vent (4), blast pipe (5) one end is provided with vacuum pump (12), fuse-element vacuum exhaust apparatus (3) bottom is connected and is provided with melt pump (6), melt pump (6) are connected and are provided with blown film aircraft nose (7), blown film aircraft nose (7) top is provided with wind ring (8).
2. The melt vent for film blowing of a screw extruder according to claim 1, wherein the melt vacuum vent (3) has an inner diameter larger than the inner diameter of the conveying pipe (2).
3. The melt vent apparatus for blown film of a screw extruder according to claim 1, wherein the conveying pipe (2) is provided with a filter device (9).
4. The melt exhaust device for film blowing of the screw extruder according to claim 1, wherein a squirrel cage stirrer (10) is arranged inside the melt vacuum exhaust device (3), and a motor (11) for driving the squirrel cage stirrer (10) to rotate is arranged outside the melt vacuum exhaust device (3).
5. The melt vent device for film blowing of a screw extruder according to claim 1, wherein the melt vacuum vent device (3) is provided with a temperature-controlled heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120892827.3U CN214645785U (en) | 2021-04-27 | 2021-04-27 | Melt exhaust device for film blowing of screw extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120892827.3U CN214645785U (en) | 2021-04-27 | 2021-04-27 | Melt exhaust device for film blowing of screw extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214645785U true CN214645785U (en) | 2021-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120892827.3U Active CN214645785U (en) | 2021-04-27 | 2021-04-27 | Melt exhaust device for film blowing of screw extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214645785U (en) |
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2021
- 2021-04-27 CN CN202120892827.3U patent/CN214645785U/en active Active
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