CN102837415A - Exhaust method for blade extruder and exhaust type blade extruder - Google Patents
Exhaust method for blade extruder and exhaust type blade extruder Download PDFInfo
- Publication number
- CN102837415A CN102837415A CN2012103544022A CN201210354402A CN102837415A CN 102837415 A CN102837415 A CN 102837415A CN 2012103544022 A CN2012103544022 A CN 2012103544022A CN 201210354402 A CN201210354402 A CN 201210354402A CN 102837415 A CN102837415 A CN 102837415A
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- China
- Prior art keywords
- blade
- exhaust
- stator
- rotor
- unit
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/68—Barrels or cylinders
- B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads
- B29C48/686—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having grooves or cavities
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/465—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/635—Eccentrically rotating screws; Screws revolving around an axis other than their central axis
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to an exhaust method for a blade extruder and an exhaust type blade extruder. According to the exhaust method, the exhaust of a material is implemented in a space of which the geometrical shape is specified and the volume increases at first and then decreases periodically, and the material is mainly under the action of tensile stress in an exhaust process. In the exhaust type blade extruder, blade exhaust units are connected in series between two blade plasticized transportation units; when melt enters into each exhaust unit, the volume of a sealed space defined by a blade, a stator, a baffle plate and a rotor increases gradually; meanwhile, due to the large eccentric distance between the rotor and the stator of each exhaust unit, the pressure of the melt in each exhaust unit sharply decreases to a negative pressure condition, accordingly, originally compressed gas and gasified volatile components foam in the melt and bubbles break up at the same time, and the escaping gas is removed from an exhaust port. The exhaust method has the characteristics of simple structure, small volume of the exhaust units and the like.
Description
Technical field
The present invention relates to macromolecular material forming processing technology field, be specifically related to a kind of blade extruder method for exhausting and exhaust blade extruder.
Background technology
In the macromolecular material molding process, need from melt, discharge gas because of containing too much moisture content, gas or various volatile matter such as monomer, oligomer, solvent etc. in the raw material usually.These gases be as discharging, defective such as possibly cause that product surface is matt, hole appears in inside, bubble and surface are dark and gloomy, even can have influence on physical and mechanical properties, chemical property and the electrical property of goods.Forming process can not normally be carried out:,, will cause fracture of wire and film breaks if there is bubble in the melt like wire drawing and blown film process.Therefore in order to improve quality of item, before processing, need carry out predrying or directly adopt vented extruder material.Adopt predryingly, not only will increase equipment and operation, and pellet and some are contained the plastics of high boiling solvent, monomer, oligomer, poor effect.Thereby the needs employing has degassing function and the very high degassing extruder of exhaust efficiency is realized exhaust.
ZL200810026054.X discloses a kind of high polymer material plasticizing transportation method and equipment based on draft flowing deformation.Utilize eccentric stator, rotor and be installed in epitrochanterian some compositions and surround space with definite geometry to blade and with the front and rear baffle of rotor coaxial.When blade rotates with rotor; Because stator has certain offset with respect to rotor; Thereby the volume in above-mentioned space can ascending successively descending again cyclically-varying; Include material when volume becomes big in, compacting when volume diminishes, plasticizing are also discharged material, realize that the material plasticizing that direct stress plays a major role transports.
Conventional vented screw can think to be in series by two screw rods each section screw rod definite functions.The exhaust outlet front is the first rank screw rod, plays the effect of basic plastifying material; The screw rod of exhaust outlet back is the second order screw rod, plays the effect of further plastifying material and metering.Be exhaust section between two sections, simultaneously exhaust section has darker screw channel, for good exhaust effect, make screw rod complex structure and be difficult for processing.Blade extruder has characteristics such as complete positive conveyance characteristic plasticizing transfer efficiency is high, floor space is little, energy consumption is low, will be widely used in macromolecular material processing and forming field.Just require the high equipment of exhaust performance valency to adapt with it the material that volatile content is high in the raising of fabricated product quality requirement and process.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of blade extruder method for exhausting and exhaust blade extruder are provided, concrete technical scheme is following.
A kind of blade extruder method for exhausting, it makes material in having the ascending periodically variable from large to small again space of definite geometry and volume, realize exhaust, and material mainly receives the tensile stress effect in the exhaust process.
In above-mentioned a kind of blade extruder method for exhausting, when material upstream blade plasticizing transported the unit and enters into the blade exhaust unit, material was to enter into the space that volume changes from small to big from volume space from large to small.
A kind of exhaust blade extruder of the present invention comprises that two or more blade plasticizings transport unit and blade exhaust unit, and blade exhaust units in series is installed in two blade plasticizings and transports between the unit.It is that the cyclically-varying that utilizes the blade plasticizing to transport unit volume realizes that the plasticizing of blade extruder transports.
Further, said blade exhaust unit comprises stator, rotor, protruding blade, recessed blade, blast pipe, first baffle plate and second baffle, and rotor and stator be concentric to be installed and rotor is arranged in the endoporus of stator, the endoporus of stator and stator outer surface off-centre; First baffle plate, second baffle are installed in the two ends of stator with one heart, play sealing and water conservancy diversion; Protruding blade, recessed blade mounted in pairs are in the groove of rotor, and concavo-convex blade slides in groove under the effect of stator; On stator and be positioned at the spatial volume maximum of being made up of stator, rotor, protruding blade, recessed blade, first baffle plate and second baffle and offer exhaust outlet, exhaust outlet is connected with blast pipe.
Further, the eccentric throw of blade exhaust unit rotor and the stator eccentric throw that transports unit rotor and stator than adjacent two blades plasticizing is big and eccentric direction is opposite.
Further, said blade exhaust unit and blade plasticization unit all adopt hollow stator with cylindrical cavity, place bore of stator and with the eccentric cylindrical rotor of stator, be arranged in rotor radially square-section through hole and along the equally distributed some compositions of rotor circumference direction arrange to the protruding blade that occurs, recessed blade and in the stator both sides and with parts such as the baffle plate composition of the concentric installation of stator.
The present invention provides in the method for exhausting, the variation of periodically changing from small to big again from large to small in time of the spatial volume of material process.The pressure that upper reaches plasticizing before melt enters into exhaust unit transports the unit melt increases gradually; When melt enters into exhaust unit; Because blade, stator, baffle plate, the formed enclosure space volume of rotor increase gradually; Simultaneously owing to eccentric throw between exhaust unit rotor and the stator is big; Thereby make that the pressure of melt sharply is reduced to negative pressure state in the exhaust unit, make the gas that was compressed originally and the volatile matter that has gasified just in melt foaming simultaneously bubble break, escaping gas is got rid of the realization exhaust from exhaust outlet.
Exhaust unit is installed between two plasticization units among the present invention, and the eccentric direction between the eccentric direction between exhaust unit rotor and the stator and plasticization unit rotor and the stator is opposite and eccentric throw is bigger.When melt flowed into exhaust unit, melt was that plasticization unit volume space from large to small enters into the space that the exhaust unit volume changes from small to big from the upper reaches.In volume space from large to small, the squeezing action that melt receives strengthens gradually, and the melt internal pressure raises.After melt gets into exhaust unit; Blade, stator, baffle plate, the formed enclosure space volume of rotor increased gradually when rotor rotated on the one hand; Owing to eccentric throw between exhaust unit rotor and the stator is bigger, this spatial volume is maximum, thereby makes melt pressure sharply be reduced to negative pressure state simultaneously; Make the gas be compressed originally and the volatile matter that the has gasified while bubble that in melt, foam break, escaping gas is got rid of from exhaust outlet.
The present invention compares with existing method for exhausting and device, has following advantage:
1, exhaust apparatus is simple in structure, has overcome the shortcoming of screw exhaust apparatus complex structure, apparatus processing difficulty;
2, the location arrangements of exhaust unit is flexible, can at diverse location exhaust outlet be set according to the material of different physical properties;
3, melt mainly receives the tensile stress effect when melt release of pressure in the exhaust process, Surface Renewal, and Surface Renewal is fast, good exhaust effect.
Description of drawings
Fig. 1 is the A--A cutaway view of blade exhaust unit.
Fig. 2 is the B--B cutaway view of blade degassing extruder.
Fig. 3 is the C--C cutaway view of blade degassing extruder.
Fig. 4 is the D--D cutaway view of blade exhaust unit.
Fig. 5 is the E--E cutaway view of blade exhaust unit.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further explanation, but the scope that the present invention requires to protect is not limited to the scope that embodiment explains.
Referring to Fig. 1, Fig. 2, a kind of exhaust blade extruder provided by the invention mainly transports unit (I, III) by two or more blade plasticizings and forms with a blade exhaust unit II overlapped in series.The blade exhaust unit mainly is made up of stator 1, rotor 2, protruding blade 3, recessed blade 4, blast pipe 5 and first baffle plate 6, second baffle 7.The endoporus of stator 1 and outer surface are eccentric, rotor 2 and stator 1 concentric installations, and first baffle plate 6, second baffle 7 are installed in the two ends of stator with one heart, play a part to seal and water conservancy diversion.Referring to Fig. 4, Fig. 5, concavo-convex blade mounted in pairs is in the groove of rotor 2, and blade is in stator inner hole mechanical force lower slider.Offering exhaust outlet with respect to the spatial volume maximum of being formed by stator 1, rotor 2, protruding blade 3, recessed blade 4 and first baffle plate 6, second baffle 7 and be connected with blast pipe 5.
Referring to Fig. 2, Fig. 3; Blade exhaust unit II is installed in series and transports the unit I and the plasticizing of second blade transports between the unit III in first blade plasticizing, and the eccentric direction of the eccentric direction of blade exhaust unit II rotor and stator and plasticization unit (I, III) rotor and stator is opposite and eccentric throw is big.It is that the cyclically-varying that utilizes the blade plasticizing to transport unit volume realizes that its plasticizing of blade extruder transports; When melt when first blade plasticizing transports the unit I and enters into blade exhaust unit II, melt is to enter into the space that volume changes from small to big from volume space from large to small.In volume space from large to small, the pressure that melt receives increases gradually.When melt enters into the exhaust unit II; In the exhaust unit since blade, stator, baffle plate, the formed enclosure space volume of rotor increase gradually; Simultaneously owing to eccentric throw between blade exhaust unit rotor 2 and the stator 1 is big; Thereby make the melt pressure sharply to be reduced to negative pressure state, the gas that was compressed originally and the volatile matter that has gasified just in melt foaming simultaneously bubble break, escaping gas is from blast pipe 5 discharges.
Claims (5)
1. a blade extruder method for exhausting is characterized in that making material in having the ascending periodically variable from large to small again space of definite geometry and volume, to realize exhaust, and material mainly receives the tensile stress effect in the exhaust process.
2. a kind of blade extruder method for exhausting according to claim 1 is characterized in that material is to enter into the space that volume changes from small to big from volume space from large to small when material upstream blade plasticizing transports the unit and enters into the blade exhaust unit.
3. exhaust blade extruder of realizing the said method of claim 1 is characterized in that comprising that blade exhaust unit and two transport the unit with the blade plasticizing, and blade exhaust units in series is installed in two blades plasticizings and transports between the unit.
4. exhaust blade extruder according to claim 3; It is characterized in that said blade exhaust unit comprises stator (1), rotor (2), protruding blade (3), recessed blade (4), blast pipe (5), first baffle plate (6) and second baffle (7); Rotor (2) and stator (1) be concentric to be installed and rotor (2) is arranged in the endoporus of stator (1), the endoporus of stator (1) and stator outer surface off-centre; First baffle plate (6), second baffle (7) are installed in the two ends of stator (1) with one heart, play sealing and water conservancy diversion; Protruding blade (3), recessed blade (4) mounted in pairs are in the groove of rotor (2), and concavo-convex blade slides in groove under the effect of stator (1); On stator and be positioned at the spatial volume maximum of being made up of stator (1), rotor (2), protruding blade (3), recessed blade (4), first baffle plate (6) and second baffle (7) and offer exhaust outlet, exhaust outlet is connected with blast pipe (5).
5. the eccentric throw that exhaust blade extruder according to claim 3, the eccentric throw that it is characterized in that blade exhaust unit rotor and stator transport unit rotor and stator than adjacent two blades plasticizing is big and eccentric direction is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210354402.2A CN102837415B (en) | 2012-09-22 | 2012-09-22 | Exhaust method for blade extruder and exhaust type blade extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210354402.2A CN102837415B (en) | 2012-09-22 | 2012-09-22 | Exhaust method for blade extruder and exhaust type blade extruder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102837415A true CN102837415A (en) | 2012-12-26 |
| CN102837415B CN102837415B (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210354402.2A Expired - Fee Related CN102837415B (en) | 2012-09-22 | 2012-09-22 | Exhaust method for blade extruder and exhaust type blade extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102837415B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103029285A (en) * | 2012-12-31 | 2013-04-10 | 浙江栋斌橡机螺杆有限公司 | Extruder |
| CN106273339A (en) * | 2016-09-23 | 2017-01-04 | 华南理工大学 | The solid non-close conveying of a kind of eccentric rotor extruder and compacting method for exhausting |
| CN116021665A (en) * | 2022-10-26 | 2023-04-28 | 郑州大学 | Environment-friendly energy-saving melt blending granulation device and method for polyethylene material processing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219565A (en) * | 2008-01-25 | 2008-07-16 | 华南理工大学 | Polymer material plasticizing and transporting method and apparatus based on draft flowing deformation |
| CN101559642A (en) * | 2009-05-19 | 2009-10-21 | 佛山市顺德区震德塑料机械有限公司 | Novel injection device for injection molding machine |
| CN202878656U (en) * | 2012-09-22 | 2013-04-17 | 广州华新科实业有限公司 | Exhausting type blade extruder |
-
2012
- 2012-09-22 CN CN201210354402.2A patent/CN102837415B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219565A (en) * | 2008-01-25 | 2008-07-16 | 华南理工大学 | Polymer material plasticizing and transporting method and apparatus based on draft flowing deformation |
| CN101559642A (en) * | 2009-05-19 | 2009-10-21 | 佛山市顺德区震德塑料机械有限公司 | Novel injection device for injection molding machine |
| CN202878656U (en) * | 2012-09-22 | 2013-04-17 | 广州华新科实业有限公司 | Exhausting type blade extruder |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103029285A (en) * | 2012-12-31 | 2013-04-10 | 浙江栋斌橡机螺杆有限公司 | Extruder |
| CN103029285B (en) * | 2012-12-31 | 2015-07-08 | 浙江栋斌橡机螺杆有限公司 | Extruder |
| CN106273339A (en) * | 2016-09-23 | 2017-01-04 | 华南理工大学 | The solid non-close conveying of a kind of eccentric rotor extruder and compacting method for exhausting |
| CN106273339B (en) * | 2016-09-23 | 2020-01-14 | 华南理工大学 | Solid non-closed conveying and compacting exhaust method of eccentric rotor extruder |
| CN116021665A (en) * | 2022-10-26 | 2023-04-28 | 郑州大学 | Environment-friendly energy-saving melt blending granulation device and method for polyethylene material processing |
| CN116021665B (en) * | 2022-10-26 | 2023-09-26 | 郑州大学 | Environment-friendly energy-saving melt blending granulation device and method for polyethylene material processing |
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| Publication number | Publication date |
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| CN102837415B (en) | 2015-07-01 |
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Granted publication date: 20150701 Termination date: 20180922 |
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