CN102837415B - 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
- CN102837415B CN102837415B CN201210354402.2A CN201210354402A CN102837415B CN 102837415 B CN102837415 B CN 102837415B CN 201210354402 A CN201210354402 A CN 201210354402A CN 102837415 B CN102837415 B CN 102837415B
- Authority
- CN
- China
- Prior art keywords
- blade
- exhaust
- stator
- rotor
- extruder
- 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
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Classifications
-
- 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
-
- 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
Landscapes
- 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 polymer material molding processing technique field, be specifically related to a kind of blade extruder method for exhausting and exhaust blade extruder.
Background technology
In polymer material molding process, usually because contain too much moisture content, gas or various volatile matter such as monomer, oligomer, solvent etc. in raw material to need Exhaust Gas from melt.These gases, as do not discharged, may cause that product surface is matt, hole appears in inside, bubble and the defect such as surface is dark and gloomy, even can have influence on the physical and mechanical properties of goods, chemical property and electrical property.Sometimes forming process also can be made normally not carry out: as wire drawing and blown film process, if there is bubble in melt, fracture of wire and film breaks will be caused.Therefore in order to improve quality of item, need before processing carry out predrying to material or directly adopt vented extruder.Adopt predrying, not only will increase equipment and operation, and to pellet and some plastics containing high boiling solvent, monomer, oligomer, poor effect.Thus need to adopt and there is degassing function and the very high degassing extruder of exhaust efficiency realizes exhaust.
ZL200810026054.X discloses a kind of high polymer material plasticizing transportation method based on draft flowing deformation and equipment.Utilize eccentric stator, rotor and be arranged on epitrochanterian some compositions to blade and and the front and rear baffle of rotor coaxial surround the space having and determine geometry.When blade rotates with rotor, because stator has certain offset relative to rotor, thus the volume in above-mentioned space can ascending descending cyclically-varying more successively, material is included in when volume becomes large, compacting when volume diminishes, plasticizing effluent material, realize the material plasticizing that direct stress plays a major role and transport.
Conventional exhaust screw rod can be thought to be in series by two screw rods, each section of screw rod definite functions.Be the first rank screw rod before exhaust outlet, play the effect of basic plastifying material; Exhaust outlet screw rod is below second order screw rod, plays the effect of further plastifying material and metering.Be exhaust section between two sections, exhaust section has darker screw channel simultaneously, in order to good exhaust effect, makes the complex structure of screw rod and not easily processes.Blade extruder has the features such as complete positive conveyance characteristic plasticizing transfer efficiency is high, floor space is little, energy consumption is low, will be widely used at polymer material molding manufacture field.Along with the material that volatile content in the raising of fabricated product quality requirement and process is high, just require that the high equipment of exhaust performance valency adapts with it.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art existence, provide a kind of blade extruder method for exhausting and exhaust blade extruder, concrete technical scheme is as follows.
A kind of blade extruder method for exhausting, it makes material determine geometry and volume is ascending realizes exhaust in periodically variable space from large to small again having, and in exhaust process, material is mainly subject to tensile stress effect.
In above-mentioned a kind of blade extruder method for exhausting, when material upstream blade plasticizing sending unit enters into blade exhaust unit, material enters into the space that volume changes from small to big.
A kind of exhaust blade extruder of the present invention, comprises two or more blades plasticizing sending unit and blade exhaust unit, and blade exhaust units in series is arranged between two blade plasticizing sending unit.It is that the cyclically-varying utilizing blade to plastify sending unit volume realizes that the plasticizing of blade extruder transports.
Further, described blade exhaust unit comprises stator, rotor, convex blade, recessed blade, blast pipe, the 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 eccentric; First baffle plate, second baffle are arranged on the two ends of stator with one heart, play sealing and water conservancy diversion; Convex blade, recessed blade mounted in pairs are in the groove of rotor, and concavo-convex blade slides under the effect of stator in groove; Stator is positioned at the spatial volume maximum be made up of stator, rotor, convex blade, recessed blade, the first baffle plate and second baffle and offers exhaust outlet, and exhaust outlet is connected with blast pipe.
Further, than adjacent two blades, the eccentric throw of blade exhaust unit rotor and stator plastifies that the eccentric throw of sending unit rotor and stator is large and eccentric direction is contrary.
Further, described blade exhaust unit and blade plasticization unit all adopt there is cylindrical cavity hollow stator, be placed in bore of stator and with the cylindrical rotor of stator bias, the radial square-section through hole being arranged in rotor and along rotor circumference direction equally distributed some compositions to the convex blade occurred, recessed blade and arrange in stator both sides and form with the part such as the concentric baffle plate installed of stator.
The invention provides in method for exhausting, the spatial volume of material process is periodically changed from small to big change in time from large to small again.The pressure of the upstream plasticizing sending unit melt before melt enters into exhaust unit increases gradually, when melt enters into exhaust unit, the enclosure space volume formed due to blade, stator, baffle plate, rotor increases gradually, simultaneously because eccentric throw between exhaust unit rotor and stator is large, thus make the pressure of melt in exhaust unit sharply be reduced to negative pressure state, originally bubbles burst while that the gas be compressed just being foamed in the melt with the volatile matter gasified, escaping gas gets rid of realization exhaust from exhaust outlet.
In the present invention, exhaust unit is arranged between two plasticization units, and exhaust unit rotor is contrary with the eccentric direction between plasticization unit rotor and stator with the eccentric direction between stator and eccentric throw is larger.When melt flows into exhaust unit, melt enters into the space that exhaust unit volume changes from small to big.In volume space from large to small, the squeezing action that melt is subject to strengthens gradually, and in melt, pressure raises.After melt enters exhaust unit, the enclosure space volume that when rotor rotates on the one hand, blade, stator, baffle plate, rotor are formed increases gradually, simultaneously because eccentric throw between exhaust unit rotor and stator is larger, this spatial volume is maximum, thus make melt pressure sharply be reduced to negative pressure state, originally bubbles burst while that the gas be compressed being foamed in the melt with the volatile matter gasified, escaping gas is got rid of from exhaust outlet.
The present invention is compared with existing method for exhausting and device, and tool has the following advantages:
1, exhauster structure is simple, overcomes the shortcoming of screw type discharging device of air complex structure, equipment processing difficulties;
2, the location arrangements of exhaust unit is flexible, can arrange exhaust outlet according to the material of different physical properties at diverse location;
During melt release of pressure, Surface Renewal 3, in exhaust process, melt is mainly subject to tensile stress effect, and Surface Renewal is fast, good exhaust effect.
Accompanying drawing explanation
Fig. 1 is the A--A sectional view of blade exhaust unit.
Fig. 2 is the B--B sectional view of blade degassing extruder.
Fig. 3 is the C--C sectional view of blade degassing extruder.
Fig. 4 is the D--D sectional view of blade exhaust unit.
Fig. 5 is the E--E sectional view of blade exhaust unit.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described further, but the scope of protection of present invention is not limited to the scope of embodiment statement.
embodiment 1
See Fig. 1, Fig. 2, a kind of exhaust blade extruder provided by the invention forms primarily of two or more blades plasticizing sending unit (I, III) and a blade exhaust unit II overlapped in series.Blade exhaust unit is formed primarily of stator 1, rotor 2, convex blade 3, recessed blade 4, blast pipe 5 and the first baffle plate 6, second baffle 7.The endoporus of stator 1 and outer surface bias, rotor 2 are installed with stator 1 is concentric, and the first baffle plate 6, second baffle 7 are arranged on the two ends of stator with one heart, play sealing and water conservancy diversion.See 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 relative to the spatial volume maximum be made up of stator 1, rotor 2, convex blade 3, recessed blade 4 and the first baffle plate 6, second baffle 7 and be connected with blast pipe 5.
See Fig. 2, Fig. 3, blade exhaust unit II is installed in series between the first blade plasticizing sending unit I and the second blade plasticizing sending unit III, and blade exhaust unit II rotor is contrary with the eccentric direction of plasticization unit (I, III) rotor and stator with the eccentric direction of stator and eccentric throw is large.It is that the cyclically-varying utilizing blade to plastify sending unit volume realizes that its plasticizing of blade extruder transports, when melt enters into blade exhaust unit II from the first blade plasticizing sending unit I, melt enters into the space that volume changes from small to big.In volume space from large to small, the pressure that melt is subject to increases gradually.When melt enters into exhaust unit II, the enclosure space volume formed due to blade, stator, baffle plate, rotor in exhaust unit increases gradually, simultaneously because eccentric throw between blade exhaust unit rotor 2 and stator 1 is large, thus make melt pressure sharply be reduced to negative pressure state, originally bubbles burst while that the gas be compressed and the volatile matter gasified just foaming in the melt, escaping gas is discharged from blast pipe 5.
Claims (3)
1. a blade extruder method for exhausting, it is characterized in that making material to determine geometry and volume is ascending realizes exhaust in periodically variable space from large to small again having, in exhaust process, material is mainly subject to tensile stress effect; Described blade extruder is exhaust blade extruder, comprises blade exhaust unit and two or more blade plasticizing sending unit, and blade exhaust units in series is arranged between two blade plasticizing sending unit; The eccentric throw of blade exhaust unit rotor and stator plastifies that the eccentric throw of sending unit rotor and stator is large than adjacent two blades and eccentric direction is contrary.
2. a kind of blade extruder method for exhausting according to claim 1, is characterized in that when material upstream blade plasticizing sending unit enters into blade exhaust unit, and material enters into the space that volume changes from small to big.
3. realize an exhaust blade extruder for method described in claim 1, it is characterized in that comprising blade exhaust unit and two or more blade plasticizing sending unit, blade exhaust units in series is arranged between two blade plasticizing sending unit; The eccentric throw of blade exhaust unit rotor and stator plastifies that the eccentric throw of sending unit rotor and stator is large than adjacent two blades and eccentric direction is contrary; Described blade exhaust unit comprises stator (1), rotor (2), convex blade (3), recessed blade (4), blast pipe (5), the 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 eccentric; First baffle plate (6), second baffle (7) are arranged on the two ends of stator (1) with one heart, play sealing and water conservancy diversion; Convex blade (3), recessed blade (4) mounted in pairs are in the groove of rotor (2), and concavo-convex blade slides under the effect of stator (1) in groove; Stator is positioned at the spatial volume maximum be made up of stator (1), rotor (2), convex blade (3), recessed blade (4), the first baffle plate (6) and second baffle (7) and offers exhaust outlet, and exhaust outlet is connected with blast pipe (5).
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 CN102837415A (en) | 2012-12-26 |
| CN102837415B true CN102837415B (en) | 2015-07-01 |
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Family Applications (1)
| 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) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103029285B (en) * | 2012-12-31 | 2015-07-08 | 浙江栋斌橡机螺杆有限公司 | Extruder |
| 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 |
| 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100496927C (en) * | 2008-01-25 | 2009-06-10 | 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 |
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2012
- 2012-09-22 CN CN201210354402.2A patent/CN102837415B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN102837415A (en) | 2012-12-26 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20180922 |