CN211640904U - Side feeding device of double-screw extruder - Google Patents
Side feeding device of double-screw extruder Download PDFInfo
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- CN211640904U CN211640904U CN202020113071.3U CN202020113071U CN211640904U CN 211640904 U CN211640904 U CN 211640904U CN 202020113071 U CN202020113071 U CN 202020113071U CN 211640904 U CN211640904 U CN 211640904U
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- liquid
- negative pressure
- screw extruder
- feed
- communicated
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- 239000007788 liquid Substances 0.000 claims abstract description 93
- 239000013078 crystal Substances 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000005086 pumping Methods 0.000 claims description 30
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 5
- 230000002950 deficient Effects 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 description 19
- 239000000047 product Substances 0.000 description 7
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 4
- 239000011976 maleic acid Substances 0.000 description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 235000012438 extruded product Nutrition 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035553 feeding performance Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003541 multi-stage reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
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- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The utility model relates to a double screw extruder's side feeding device, it is including setting up the feed bin on the barrel feed end one side of organism, and the feed bin overcoat is equipped with the interior heating jacket that leads to hot oil, and feed bin lower extreme intercommunication has crystal filter equipment, and crystal filter equipment goes out the liquid end intercommunication and is provided with the negative pressure drawing liquid device, and the liquid end intercommunication of negative pressure drawing liquid device has the measuring pump, and the output intercommunication of measuring pump has many pieces to divide the notes pipe, respectively divide the notes pipe all with the feed end intercommunication of barrel. The utility model has the advantages of reduce the defective rate of products.
Description
Technical Field
The utility model relates to an extruder technical field, more specifically say, it relates to a double screw extruder's side feeding device.
Background
The double-screw extruder is developed on the basis of a single-screw extruder, and has the characteristics of good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability and the like, so that the double-screw extruder is widely applied to molding and processing of extruded products at present. In the double-screw extruder, the material is fed by a feeding device and reaches a die of a machine head under the action of a screw.
Chinese patent with publication number CN207901645U discloses a double screw extruder, which comprises a bracket, fuselage and the twin-screw of setting in the fuselage of fixed connection on the support, fuselage one end fixedly connected with feed inlet, the fuselage other end is provided with the discharge gate, the fuselage includes the barrel that a plurality of series connection set up, all be provided with an gas vent on each barrel, the fuselage upper end is provided with an blast pipe, be provided with the first branch pipe of many intercommunication each gas vent and blast pipe on the blast pipe, it is equipped with two vacuum pumps to add on the blast pipe, be provided with two second branch pipes that set up with the vacuum pump intercommunication on the blast pipe.
Similar to the above-mentioned twin-screw extruder, maleic anhydride (solid at room temperature) is commonly used in the actual extrusion line, and the maleic anhydride is added into a stirring barrel to be blended with plastic particles, and then is added into the extruder through a feeding port. Because the melting point of the maleic anhydride is low, and the temperature of the feeding port of the extruder is high, the maleic anhydride is slightly gasified at the feeding port and is condensed on the lower surface of the feeding port, and in the subsequent production process, the condensed maleic anhydride falls off from the surface of the feeding port and is mixed into other raw materials in the extruder, so that the phenomena of yellowing, hollowness and the like of the product are caused, and the reject ratio of the product is high, so that the improvement is needed.
SUMMERY OF THE UTILITY MODEL
To the technical problem that has now, an object of the utility model is to provide a double screw extruder's side feeding device, it has the advantage that reduces the product defective rate.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a double screw extruder's side feeding device, is including setting up in the feed bin on the barrel feed end one side of organism, and the feed bin upper end is provided with the feed inlet, and the feed bin overcoat is equipped with the heating jacket, and through having heat transfer medium in the heating jacket, feed bin lower extreme intercommunication has the negative pressure drawing liquid device that sets up on the organism in order to be arranged in pumping feed bin liquid raw materials to barrel, and the feed liquor end of negative pressure drawing liquid device sets up with the lower extreme intercommunication of feed bin, and the play liquid end of negative pressure drawing liquid device sets up with the feed end intercommunication of barrel.
Through adopting above-mentioned technical scheme, be liquid through establishing the heating jacket at the feed bin overcoat with raw materials heating melting, rethread negative pressure drawing liquid device is pumped liquid raw materials to the feed end of barrel in order to use, so, liquefy maleic anhydride raw materials earlier, pour into the extruder into again to avoid the phenomenon that the gasification of maleic anhydride raw materials condenses and drops, reduced the defective rate of extruding the product.
The utility model discloses further set up to: the feed inlet is communicated with a nitrogen feeding pipe.
Through adopting above-mentioned technical scheme, carry the raw materials to the feed bin under the protection of air and nitrogen gas through the nitrogen gas filling tube, let in nitrogen gas will be able to protect liquid maleic anhydride's stability.
The utility model discloses further set up to: a crystal filtering device is communicated between the stock bin and the negative pressure liquid pumping device.
By adopting the technical scheme, the maleic anhydride is heated and liquefied in the atmosphere of air and nitrogen, and in the continuous heating process, a small amount of water vapor condensed by the air reacts with the maleic anhydride to generate the high-melting-point crystals of the maleic acid (the melting point of the high-melting-point crystals is 50-100 ℃ higher than that of the maleic anhydride, so that the crystal shape is still kept at the current heating temperature), and therefore, a crystal filtering device is arranged to prevent the crystals from entering a pipeline to block the negative-pressure liquid pumping device.
The utility model discloses further set up to: the liquid inlet end and the liquid outlet end of the crystal filtering device are respectively connected and fixed with the storage bin and the negative-pressure liquid pumping device through flanges, and sealing gaskets are arranged at gaps at the joints of the flanges.
By adopting the technical scheme, the crystal filtering device is fixed between the storage bin and the negative-pressure liquid pumping device by arranging the flange connection, so that the crystal filtering device is convenient to disassemble and clean and replace; in order to prevent liquid from overflowing from the gap or air from entering the pipeline, sealing gaskets are arranged at the joint of the two flanges of the pipeline so as to ensure the tightness of the connection between the crystal filtering device and the storage bin as well as the negative pressure liquid pumping device.
The utility model discloses further set up to: the liquid outlet end of the negative pressure liquid pumping device is communicated with a metering pump arranged on the machine body, and the liquid outlet end of the metering pump is communicated with the feeding end of the machine barrel.
By adopting the technical scheme, the automatic adjustment of the raw material injection amount can be realized by arranging the metering pump, the instability and the error of manual operation are reduced, and only the preset data of product performance according to different requirements are needed.
The utility model discloses further set up to: the output end of the metering pump is communicated with a plurality of separate injection tubes, and the separate injection tubes are uniformly distributed on one side of the feed end of the machine barrel and are communicated with the machine barrel.
Through adopting above-mentioned technical scheme, pour into the extruder with the raw materials through setting up a plurality of branch notes pipes, realized the effect that the multiple spot was poured into, guarantee the requirement of even and multistage reaction.
The utility model discloses further set up to: the liquid inlet end of the negative pressure liquid pumping device is communicated with a liquid inlet pipe, the liquid outlet end of the negative pressure liquid pumping device is communicated with a liquid outlet pipe, and the inner diameter of the liquid inlet pipe is larger than that of the liquid outlet pipe.
By adopting the technical scheme, the liquid inlet pipe is larger than the liquid outlet pipe in diameter, so that the situation that liquid in the negative-pressure liquid pumping device is pumped out and idles is avoided, and the negative-pressure liquid pumping device is further protected.
The utility model discloses further set up to: the machine body is provided with a cover body positioned on one side of the feeding end of the machine barrel, the storage bin is arranged on the cover body, and the crystal filtering device, the negative pressure liquid pumping device and the metering pump are all arranged in the cover body.
Through adopting above-mentioned technical scheme, protect filter equipment, negative pressure drawing liquid device and measuring pump through setting up the cover body, avoid artificially losing these precision instruments by mistake, also support the installation of feed bin and each part simultaneously.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the feed bin is sleeved with the heating sleeve and internally communicated with the heat transfer medium, the feed bin is communicated with the negative pressure liquid pumping device, and the liquid raw material is pumped to the machine barrel by the negative pressure liquid pumping device, so that the maleic anhydride raw material is liquefied and then injected into the extruder, the phenomenon that the maleic anhydride raw material is gasified, condensed and dropped is avoided, and the reject ratio of an extruded product is reduced;
(2) through set up the nitrogen gas filling tube on the feed bin, there is crystal filter equipment at feed bin lower extreme intercommunication, so will further reduce the defective rate of product.
Drawings
Fig. 1 is a front view of the present invention;
fig. 2 is a front view of the present invention after the cover is added.
Reference numerals: 1. a body; 2. a barrel; 3. a storage bin; 4. a feed inlet; 5. heating a jacket; 6. a heat transfer medium; 7. a negative pressure liquid pumping device; 8. a nitrogen feed tube; 9. a crystal filtering device; 10. a sealing gasket; 11. a metering pump; 12. a dispensing tube; 13. a liquid inlet pipe; 14. a liquid outlet pipe; 15. a cover body.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a double screw extruder's side feeding device, including setting up in feed bin 3 on 2 feed end one sides of barrel of organism 1, 3 upper ends of feed bin are provided with feed inlet 4, 3 overcoat of feed bin are equipped with heating jacket 5, through having heat transfer medium 6 in the heating jacket 5, 3 lower extreme intercommunications of feed bin have set up on organism 1 in order to be arranged in pumping feed bin 3 liquid maleic anhydride to 2 negative pressure drawing liquid device 7 of barrel, the feed liquor end of negative pressure drawing liquid device 7 sets up with the lower extreme intercommunication of feed bin 3, the play liquid end of negative pressure drawing liquid device 7 sets up with the feed end intercommunication of barrel 2, through pouring into the extruder after earlier maleic anhydride melt liquefaction, thereby avoid the phenomenon that the gasification of maleic anhydride raw materials condenses and drops, reduce the defective rate of product.
The heat transfer medium 6 introduced into the heating jacket 5 is hot oil, and because the special physicochemical property of maleic anhydride is considered, particularly the maleic anhydride reacts with water to generate maleic acid crystals, the utilization rate of the maleic anhydride is reduced, and the crystallization precipitate can also block pipelines, the heat transfer medium 6 is considered to leak, so the heat transfer medium adopts an oil heating mode. Further, a nitrogen feeding pipe 8 is communicated with a feeding hole 4 of the storage bin 3, nitrogen needs to be introduced for ensuring the stability of the liquid maleic anhydride, and the maleic anhydride is melted and liquefied under the atmosphere of air and nitrogen.
Because a small amount of water vapor carried in the air is easy to react with the maleic anhydride to generate the high-melting-point crystals of the maleic acid, the crystal filtering device 9 for filtering the high-melting-point crystals of the maleic acid is communicated with the lower end of the storage bin 3, and the crystal filtering device 9 can be specifically set as a T-shaped filter. Furthermore, the liquid inlet end and the liquid outlet end of the crystal filtering device 9 are respectively connected and fixed with the stock bin 3 and the negative pressure liquid pumping device 7 through flanges (not marked in the figure), so that the crystal filtering device 9 is convenient to disassemble, replace and clean; to avoid liquid escaping from its gaps or air entering the pipe, a sealing gasket 10 will be provided at the gap at the flange joint.
A liquid inlet pipe 13 is communicated with a liquid inlet end of the negative pressure liquid pumping device 7, a liquid outlet pipe 14 is communicated with a liquid outlet end of the negative pressure liquid pumping device 7, the liquid inlet pipe 13 and the liquid outlet pipe 14 are connected through a reducing joint, the inner diameter of the liquid inlet pipe 13 is larger than that of the liquid outlet pipe 14, the liquid in the negative pressure liquid pumping device 7 is prevented from being pumped out and idling by setting the pipe diameter of the liquid inlet pipe 13 to be larger than that of the liquid outlet pipe 14, and the negative pressure liquid pumping device 7 is further protected; specifically, the negative pressure liquid pumping device 7 is configured as a vacuum pump.
The liquid outlet pipe 14 of the negative pressure liquid pumping device 7 is communicated with a metering pump 11 arranged on the machine body 1, the output end of the metering pump 11 is communicated with a plurality of separate injection pipes 12, each separate injection pipe 12 is uniformly distributed on one side of the feeding end of the machine barrel 2 and is communicated with the machine barrel 2, the automatic adjustment of the injection amount of raw materials can be realized by arranging the metering pump 11, the instability and the error of manual operation are reduced, and a plurality of separate injection pipes 12 are arranged to ensure the uniform injection of the raw materials.
Referring to fig. 1 and 2, a cover body 15 located on one side of the feeding end of the machine barrel 2 is arranged on the machine body 1, the storage bin 3 is arranged on the cover body 15, the filtering device, the negative pressure liquid pumping device 7 and the metering pump 11 are all arranged in the cover body 15, and the cover body 15 is arranged to protect internal precision equipment and is used for supporting and installing the storage bin 3.
The implementation principle of the embodiment is as follows: hot oil is introduced into a heating sleeve 5 to preheat a stock bin 3, raw materials are pumped into the stock bin 3 through a nitrogen feeding pipe 8 under the atmosphere of nitrogen and air, the raw materials are heated, a vacuum pump is started to pump the liquid raw materials to a metering pump 11, and the metering pump 11 controls the injection amount of the raw materials to be injected into a machine barrel 2 through each injection pipe 12 through preset data.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. The utility model provides a side feeding device of twin-screw extruder which characterized in that: including setting up feed bin (3) on barrel (2) feed end one side of organism (1), feed bin (3) upper end is provided with feed inlet (4), feed bin (3) overcoat is equipped with heating jacket (5), through having heat transfer medium (6) in heating jacket (5), feed bin (3) lower extreme intercommunication has the negative pressure drainage device (7) that sets up on organism (1) in order to be arranged in sucking feed bin (3) liquid maleic anhydride to barrel (2), the inlet end of negative pressure drainage device (7) sets up with the lower extreme intercommunication of feed bin (3), the play liquid end of negative pressure drainage device (7) sets up with the feed end intercommunication of barrel (2).
2. The side feeding device of the twin-screw extruder according to claim 1, wherein: the feed inlet (4) is communicated with a nitrogen feeding pipe (8).
3. The side feeding device of the twin-screw extruder according to claim 1, wherein: and a crystal filtering device (9) is communicated between the stock bin (3) and the negative-pressure liquid pumping device (7).
4. The side feeding device of the twin-screw extruder according to claim 3, wherein: the liquid inlet end and the liquid outlet end of the crystal filtering device (9) are respectively connected and fixed with the storage bin (3) and the negative-pressure liquid pumping device (7) through flanges, and a sealing gasket (10) is arranged at a gap at the joint of the flanges.
5. The side feeding device of the twin-screw extruder according to claim 3, wherein: the liquid outlet end of the negative pressure liquid pumping device (7) is communicated with a metering pump (11) arranged on the machine body (1), and the liquid outlet end of the metering pump (11) is communicated with the feed end of the machine barrel (2).
6. The side feeding device of the twin-screw extruder according to claim 5, wherein: the output end of the metering pump (11) is provided with a plurality of branch injection pipes (12) in a communicating manner, and each branch injection pipe (12) is uniformly distributed on one side of the feeding end of the machine barrel (2) and is communicated with the machine barrel (2).
7. The side feeding device of the twin-screw extruder according to claim 1, wherein: the liquid inlet end of the negative pressure liquid pumping device (7) is communicated with a liquid inlet pipe (13), the liquid outlet end of the negative pressure liquid pumping device (7) is communicated with a liquid outlet pipe (14), and the inner diameter of the liquid inlet pipe (13) is larger than that of the liquid outlet pipe (14).
8. The side feeding device of the twin-screw extruder according to claim 5, wherein: the machine body (1) is provided with a cover body (15) positioned on one side of the feeding end of the machine barrel (2), the storage bin (3) is arranged on the cover body (15), and the crystal filtering device (9), the negative pressure liquid pumping device (7) and the metering pump (11) are all arranged in the cover body (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020113071.3U CN211640904U (en) | 2020-01-17 | 2020-01-17 | Side feeding device of double-screw extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020113071.3U CN211640904U (en) | 2020-01-17 | 2020-01-17 | Side feeding device of double-screw extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211640904U true CN211640904U (en) | 2020-10-09 |
Family
ID=72683914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020113071.3U Active CN211640904U (en) | 2020-01-17 | 2020-01-17 | Side feeding device of double-screw extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211640904U (en) |
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2020
- 2020-01-17 CN CN202020113071.3U patent/CN211640904U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 631, 581, tonglong 2nd Road, industrial zone, torch hi tech Zone (Xiang'an), Xiamen City, Fujian Province, 361102 Patentee after: COEs Chemical Co.,Ltd. Address before: 361000 west side of the first floor of building a, 131 Xifu Road, Tong'an District, Xiamen City, Fujian Province Patentee before: XIAMEN KEAISI PLASTIC CEMENT TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Side feeding device of twin screw extruder Effective date of registration: 20220224 Granted publication date: 20201009 Pledgee: Bank of China Limited Xiamen Kaiyuan sub branch Pledgor: COEs Chemical Co.,Ltd. Registration number: Y2022980001793 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20201009 Pledgee: Bank of China Limited Xiamen Kaiyuan sub branch Pledgor: COEs Chemical Co.,Ltd. Registration number: Y2022980001793 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A side feeding device for a twin-screw extruder Granted publication date: 20201009 Pledgee: Bank of China Limited Xiamen Kaiyuan sub branch Pledgor: COEs Chemical Co.,Ltd. Registration number: Y2024980013985 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |