CN202439204U - Non-stop screen changer for bypass-method polypropylene waste extruder - Google Patents
Non-stop screen changer for bypass-method polypropylene waste extruder Download PDFInfo
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- CN202439204U CN202439204U CN201220076194XU CN201220076194U CN202439204U CN 202439204 U CN202439204 U CN 202439204U CN 201220076194X U CN201220076194X U CN 201220076194XU CN 201220076194 U CN201220076194 U CN 201220076194U CN 202439204 U CN202439204 U CN 202439204U
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- bypass
- extruder
- screen
- filtering
- valve
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to a non-stop screen changer for a bypass-method polypropylene waste extruder. The non-stop screen changer for a bypass-method polypropylene waste extruder comprises an extruder, a main filtering device and a main filtering screen, wherein the front side and the rear side of the main filtering device are respectively provided with a valve; a spiral tail end of the extruder is provided with a bypass pipe, and a bypass filtering device and a bypass filtering screen are arranged on the bypass pipe; and the front side and the rear side of the bypass filtering device are also respectively provided with a valve. According to the non-stop screen changer, when the filtering screen is needed to be changed, a control valve on a conveying pipeline of the extruder is turned off, and meanwhile, a control valve on the bypass pipe is turned on, and molten raw materials flow through the temporary bypass pipe for continuously supplying materials to the mould; and after the filtering screen is changed, the bypass pipe is closed, meanwhile, a main filtering channel is opened, and the molten raw materials enter the molding mould through the main filtering screen. The non-stop screen changer has the advantages that the extruder is not stopped during replacing the filtering screen, so that time waste and material loss are reduced, and the non-stop screen changer has the effects of saving time and reducing loss.
Description
Technical field
The utility model relates to the Polywoven Bag production equipment, and promptly a kind of the method for bypass polypropylene waste material extruder is not shut down net-changing device.
Background technology
At present; Common Polywoven Bag production process is following: raw material → plastic-wire drawing machine → winder → circular weaving machine → compounding machine → printing machine → cutting bag machine is put a bag frame → sack closer → baling press → dispatch from the factory; Have a large amount of waste materials to produce in the production, many impurity is arranged in the waste material of recovery, the waste material of recovery is through broken, oven dry; The raw material that oven dry is good is put wire drawing machine into and is re-used, and drops into and produces.Get into extruder after under the mutual shearing of the external heat of 190-250 ° of C and screw rod and machine barrel at raw material; Material is under almost completely plasticizing situation; Extruded through mould molding by quantitative, level pressure; The film that becomes molten gets in the cooling water, after cooling, gets into wire-drawing equipment and finally forms flat filament.In order to prevent that impurities in raw materials particle etc. from getting into mould, before the plasticizing back gets into mould fully, screen pack is housed at raw material.But; Screen pack is designed to fixed structure usually in existing molding machine equipment; Changed again when screen pack stops up the charging machinery that must stop under the out of use situation fully, therefore influenced ordinary production, wasted plenty of time and plastic raw materials.
Summary of the invention
In order to overcome the deficiency of existing molding machine the problems referred to above, the utility model provides a kind of the method for bypass polypropylene waste material extruder not shut down the new design of net-changing device.
This method for bypass polypropylene waste material extruder is not shut down net-changing device; Comprise an extruder, main filter and main filter screen; It is characterized in that a valve is respectively arranged before and after main filter, one shunt valve is arranged at the spiral end of extruder; By-passing filter device and by-passing filter net are housed on the shunt valve, a valve is also respectively arranged before and after the by-passing filter device.
Tell a branch pipe(tube) in the extruder rear end; Directly insert in the mould, send at extruder filter and screen pack respectively are housed in pipeline and the bypass duct, two control valves also are housed;, just turn off by needs the main control valve on the extruder conveyance conduit when changing filter screen; Open the control valve on the bypass duct simultaneously, fused raw material continues as the mould feed through stream inicdental bypath pipeline, closes bypass duct again after more finishing changing filter screen; Opened main filter screen passage simultaneously, fused raw material gets into mould through main filter screen.
The beneficial effect of the utility model is that the draping process is not shut down, and has reduced the loss of waste of time and material, the effect that play when saving, joint consumes.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Accompanying drawing is the scheme schematic diagram of the utility model.
Among the figure: 1. main filter, 2. main filter screen, 3. control valve, 4. control valve, 5. mould, 6. shunt valve, 7. extruder, 8. control valve, 9, control valve, 10, the by-passing filter device, 11, the by-passing filter net.
The specific embodiment
This method for bypass polypropylene waste material extruder is not shut down net-changing device; Comprise an extruder 7, main filter 1 and main filter screen 2; A valve 3 and valve 8 are respectively arranged in main filter 1 front and back; Spiral end at extruder 7 has a shunt valve 6, and by-passing filter device 10 and by-passing filter net 11 are housed on the shunt valve 6, and a valve 4 and valve 9 are also respectively arranged in by-passing filter device 10 front and back.
Claims (1)
1. the method for bypass polypropylene waste material extruder is not shut down net-changing device; Comprise an extruder, main filter and main filter screen; It is characterized in that a valve is respectively arranged before and after main filter, one shunt valve is arranged at the spiral end of extruder; By-passing filter device and by-passing filter net are housed on the shunt valve, a valve is also respectively arranged before and after the by-passing filter device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220076194XU CN202439204U (en) | 2012-03-04 | 2012-03-04 | Non-stop screen changer for bypass-method polypropylene waste extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220076194XU CN202439204U (en) | 2012-03-04 | 2012-03-04 | Non-stop screen changer for bypass-method polypropylene waste extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202439204U true CN202439204U (en) | 2012-09-19 |
Family
ID=46820658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220076194XU Expired - Fee Related CN202439204U (en) | 2012-03-04 | 2012-03-04 | Non-stop screen changer for bypass-method polypropylene waste extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202439204U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117398838A (en) * | 2023-10-16 | 2024-01-16 | 英德市西洲气体有限公司 | Multistage filtration's high-purity acetylene purification device |
-
2012
- 2012-03-04 CN CN201220076194XU patent/CN202439204U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117398838A (en) * | 2023-10-16 | 2024-01-16 | 英德市西洲气体有限公司 | Multistage filtration's high-purity acetylene purification device |
| CN117398838B (en) * | 2023-10-16 | 2024-05-10 | 英德市西洲气体有限公司 | Multistage filtration's high-purity acetylene purification device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20130304 |