CN113927871B - Extrusion device containing eccentric screw and extruder - Google Patents
Extrusion device containing eccentric screw and extruder Download PDFInfo
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- CN113927871B CN113927871B CN202111170858.9A CN202111170858A CN113927871B CN 113927871 B CN113927871 B CN 113927871B CN 202111170858 A CN202111170858 A CN 202111170858A CN 113927871 B CN113927871 B CN 113927871B
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- 238000001125 extrusion Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 46
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 7
- 239000006185 dispersion Substances 0.000 abstract description 2
- 230000036632 reaction speed Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
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- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- B29C48/505—Screws
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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
- B29C48/505—Screws
- B29C48/56—Screws having grooves or cavities other than the thread or the channel
-
- 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
- B29C48/565—Screws having projections other than the thread, e.g. pins
-
- 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
- B29C48/59—Screws characterised by details of the thread, i.e. the shape of a single thread of the material-feeding screw
- B29C48/615—Threads having varying helix angles
-
- 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
-
- 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
- B29C48/64—Screws with two or more threads
-
- 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
- B29C48/681—Barrels or cylinders for single screws
-
- 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
- B29C48/688—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads having threads
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention provides an extrusion device containing an eccentric screw and an extruder, belonging to the technical field of large-scale mixing extruder units. The device forms a relatively closed area through the inner wall of the machine barrel with the inner wall surface of the short-amplitude circular outward-rotating wheel line and the meshed screw, and the size of the area periodically changes along with the rotation of the screw, so that the stretching flow of materials is realized, and the dispersion performance of the extruder is enhanced. The screw tip and raised portions of the barrel inner wall improve the self-cleaning of the device flow channel. The screw rod rotates a circle to compress materials for 2n times, and the mixing efficiency and the reaction speed are improved.
Description
Technical Field
The invention belongs to the technical field of large-scale mixing extrusion units, and particularly relates to an extrusion device containing an eccentric screw.
Background
The synthetic polymer material mainly refers to three synthetic materials of plastic, synthetic rubber and synthetic fiber, and plays an important role in the main national economy fields of buildings, transportation, agriculture, electrical and electronic industries and the like and in daily life of people. At present, the extruder plays an important role in the fields of high polymer polymerization processing and reaction and mixing of high-viscosity materials by virtue of strong mixing and conveying capacity. At present, the classified quantity of high polymer materials is increased and the functions are refined, people have higher requirements on the precision of high polymer products, and the higher requirements are provided for the mixing capacity and the reaction uniformity of an extruder unit. On the other hand, the development of the extruder is also restricted by the problems of large occupied area of unit materials of the extruder, high specific energy consumption of equipment and the like. Therefore, domestic and foreign extruders are developed in the direction of high efficiency, large scale, high yield, low energy consumption and intellectualization.
At present, most of domestic and foreign extruders realize mixing and conveying of materials through shearing action between a screw and a machine barrel and between the screw and the screw. However, extensional rheology is more efficient in mixing, energy utilization, than shear drag. Therefore, the proportion of the stretching flow in the extruder is increased by changing the screw ridge shape and the like in one part of the extruder, and the stretching flow of the material is realized by changing the motion state of the screw and increasing the pin on the machine barrel to force the screw to reciprocate while rotating.
Chinese patent [ patent No.: CN104002447B discloses a method and a device for volume pulse deformation plasticizing transportation of an eccentric rotor, wherein the method is to divide the inner space of a machine barrel into a plurality of independent flow channels through the eccentric rotor and an eccentric stator, and the transportation volume of materials is changed periodically through the rotation of a screw rod, so that the volume pulse deformation melting plasticizing transportation is realized. The invention enhances the mass and heat transfer effect in the plasticizing and transporting process of the polymer, and is beneficial to shortening the thermomechanical process and reducing the energy consumption.
Although conventional screws have a great deal of design experience and a variety of screw elements of different characteristics, achieving better mixing performance requires a larger length to diameter ratio. The cross section of the screw of the eccentric extensional rheological extruder is only circular, the variable parameters of the screw are less, and different screw shapes are difficult to design according to different requirements of different materials. Therefore, designing an extruder with short thermal mechanical process, high mixing efficiency, high energy utilization rate, good self-cleaning property and good specific processability is one of the approaches for solving the current problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an extruder device of a special-shaped eccentric screw. The device forms a relatively closed area through the inner wall of the machine barrel with the inner wall surface of the short-amplitude circular outward-rotating wheel line and the meshed screw, and the size of the area periodically changes along with the rotation of the screw, so that the stretching flow of materials is realized, and the dispersion performance of the extruder is enhanced. The screw tip and raised portions of the barrel inner wall improve the self-cleaning of the device flow channel. The screw rod rotates a circle to compress materials for 2n times, and the mixing efficiency and the reaction speed are improved.
The technical scheme of the invention is as follows:
an extruder device comprising an eccentric screw, comprising a screw section and a barrel section;
the circumferential section of the inner wall of the machine barrel of the spiral section is a short-amplitude circular outward-rotation wheel line; the spiral section screw rod rotates in the machine barrel, the revolution speed is n times of the rotation angular speed, and the circumferential section of the spiral section screw rod is a regular n-polygon surrounded by n same arc lines; the inner wall surface of the barrel of the spiral section is meshed with the screw of the spiral section; on the circumferential cross section of the spiral section machine barrel and the spiral section screw rod, the spiral section screw rod divides the inner space of the extruder into n areas, and the two adjacent areas are communicated with the inner wall of the extruder through the matching gap between the top point of the rotor and the inner wall of the extruder. The lead of the barrel of the rotating section is (n-1)/n times of the lead of the screw of the corresponding rotating section.
Further, n has a value of 3 or 4.
Further, the lead of the screw section and the barrel of the screw section can be gradually increased or decreased, and accordingly, the stretching and the compression of the material in the extrusion device are realized.
Furthermore, the bulge of the inner wall surface of the spiral section machine barrel and the spiral edge of the spiral section screw are grooved, so that materials in different flow channels can be mixed with each other, and when pressure difference exists between the materials in the different flow channels, the materials can be forced to pass through the grooves, and the strength of the tensile flow is further improved.
Furthermore, the extruder device further comprises a linear section screw and a linear section cylinder, wherein the circumferential section of the inner wall of the linear section cylinder is a short-amplitude circular outward-rotating wheel line, and the circumferential section of the linear section screw is a regular n-polygon surrounded by n same arc lines.
Further, the straight-line section screw and the straight-line section cylinder jointly form a straight-line section unit, the spiral section screw and the spiral section cylinder spiral section unit, and the straight-line section screw and the spiral section cylinder spiral section unit can be used in combination.
Furthermore, the straight line section units and the spiral section units are alternately arranged, so that the stretching and the compression of materials in the extrusion device can be strengthened.
Furthermore, the plurality of straight line section units are continuously spliced at different phase angles, so that the shearing and back mixing of materials can be increased, and the distribution mixing performance of the extruder is enhanced.
An extruder comprises the extruder device containing the eccentric screw.
Compared with the prior art, the invention has the following beneficial effects:
the machine barrel and the screw realize compression, tensile flow and forward conveying of materials through different helical section leads or linear sections. Combine tensile and traditional screw extruder of volume, when realizing that the material volume is tensile, reduced the rotatory eccentric degree of screw rod, through intermeshing's barrel and screw rod, divide into n regions with runner hoop cross-section, the rotatory a week of screw rod can compress the material 2n times, when having improved the tensile efficiency that flows of material and polymer plastify and mix the efficiency. The tip of the extruder rotor is always meshed with the inner wall of the machine barrel, so that the self-cleaning property of the machine barrel is effectively ensured; the screw rotates for a circle, the convex part on the machine barrel can sweep the cambered surface of the screw for n-1 times, and the self-cleaning property of the screw is effectively ensured. Through changing the parameter of the circumferential section curve of the extruder, a more suitable machine barrel structure is designed for different materials, and meanwhile, the material transportation process does not depend on the friction force between the materials and the wall surface, so that the application range of the extruder device is widened.
Drawings
Fig. 1 is a schematic view of the structure of an eccentric rotor extruder device.
FIG. 2 is a circumferential cross-sectional view of an eccentric rotor extruder apparatus.
FIG. 3 is an isometric view of a second helical section of an eccentric rotor extruder device.
FIG. 4 is a front view of a second screw section of an eccentric rotor extruder apparatus.
Fig. 5 is a left side view of a second screw section of the eccentric rotor extruder apparatus.
Fig. 6 shows the cross-sectional change of the eccentric rotor extruder device during operation.
FIG. 7 shows the variation of the section of the meshing block during the operation of the eccentric rotor extruder device.
FIG. 8 is a cross-sectional view of an alternate screw of an eccentric rotor extruder device.
FIG. 9 is a three-view of an alternate screw of the eccentric rotor extruder apparatus.
FIG. 10 is a cross-sectional view of a continuous screw of an eccentric rotor extruder device.
FIG. 11 is a three-view of a continuous screw of an eccentric rotor extruder device.
FIG. 12 is a three-view diagram of the screw linear units of the eccentric rotor extruder device arranged in series.
FIG. 13 is a three-view illustration of a slotted screw of an eccentric rotor extruder device.
Detailed Description
The invention is explained in more detail below with reference to the following examples and the accompanying drawings:
example 1
As shown in FIG. 1, the eccentric rotor extruder device comprises a machine barrel 1 and a screw 2, wherein the screw 2 is positioned inside the machine barrel 1; barrel 1 and screw comprise 3 helical sections of different lead; the screw lead was 1.5 times the barrel lead in each helical section, with the barrel 1 and screw being shown in cross-section in fig. 2, and the second helical section being shown in cross-section in fig. 3, 4 and 5. As shown in fig. 2, the curve of the inner wall of the cylinder 1 is a short-width circumcircle wheel line, and the parametric equation is x ═ 30 × cos (t) -5 × cos (3 × t), y ═ 30 × sin (t) -5 × sin (3 × t), where t is an independent variable and has a value range of [0, 2 pi ], the inner wall of the cylinder is helical, the lead of the first section is 80mm, the number of turns is 3, the lead of the second section is 60mm, the number of turns is 3, the lead of the third section is 40mm, and the number of turns is 3; the section of the outer wall of the machine barrel 1 is a circle with the diameter of 90; three points at the tip of the section of the screw 2 always move along the curve; the section of the screw rod 2 is a triangle formed by three circular arcs with radius of 70mm and central angle of 43 degrees, the screw rod is spiral, the lead of the first section is 120mm, the number of turns is 2, the lead of the second section is 90mm, the number of turns is 2, the lead of the third section is 30mm, and the number of turns is 2.
The material enters the extruder from the feed inlet 3, the shape of the material is periodically changed in the extruder, the machine barrel 1 and the screw 2 are mutually meshed, so that the material is efficiently mixed, and the material leaves the extruder from the tail end of the machine barrel.
In the structure, the tip of the screw 2 passes through the inner wall surface of the machine barrel 1 for 3 times in each rotation of the screw, and the convex part of the inner wall surface of the machine barrel 1 passes through the curved surface of the screw for 2 times; the revolution radius of the screw 2 is 5 mm; the screw 2 can compress the material 6 times per 1 revolution.
Combine tensile and traditional screw extruder of volume, when realizing that the material volume is tensile, reduced the rotatory eccentric degree of screw rod, through intermeshing's barrel and screw rod, divide into 3 regions with runner annular cross-section, the rotatory a week of screw rod can compress the material 6 times, efficiency when having improved the tensile mobile efficiency of material and the plastify of polymer and mixing. The tip of the extruder rotor is always meshed with the inner wall of the machine barrel, so that the self-cleaning property of the machine barrel is effectively ensured; the screw rod rotates for a circle, the convex part on the machine barrel can sweep the cambered surface of the screw rod for 2 times, and the self-cleaning property of the screw rod is effectively ensured.
Example 2
As shown in fig. 8 and fig. 9, the curve of the inner wall of the cylinder of the eccentric rotor extruder device is a short-width external rotation wheel line, and the parameter equation is x-30 × cos (t) -5 × cos (3 × t), y-30 × sin (t) -5 × sin (3 × t), where t is an independent variable and has a value range of [0, 2 pi ], the leads of the helical elements of the cylinder are all 80mm, the number of turns is 0.75, the length of the linear elements of the cylinder is 10mm, and the section of the outer wall of the cylinder 1 is a circle with a diameter of 90; the section of the screw is a triangle formed by three arcs with radius of 70mm and central angle of 43 degrees, the lead of the screw spiral unit is 120mm, the number of turns is 0.5, and the length of the screw linear unit is 10 mm.
When the spiral units and the linear units are alternately arranged, the shape of the material in the screw can be periodically changed, so that the compression and stretching degrees of the material in the extruder are enhanced, the dispersive mixing capability of the extruder is improved, and the material is efficiently mixed in the extruder.
Example 3
As shown in fig. 10 and fig. 11, the curve of the inner wall of the cylinder of the eccentric rotor extruder device is a short-width external rotation wheel line, and the parameter equation is x-30 × cos (t) -5 × cos (3 × t), y-30 × sin (t) -5 × sin (3 × t), where t is an independent variable and has a value range of [0, 2 pi ], the lead of the spiral unit of the cylinder is 80mm, the number of turns of the first spiral unit is 6, the number of turns of the second spiral unit is 1.5, the length of the straight unit of the cylinder is 8mm, and the section of the outer wall of the cylinder 1 is a circle with a diameter of 90; the section of the screw is a triangle formed by three arcs with radius of 70mm and central angle of 43 degrees, the lead of the screw spiral unit is 120mm, the number of turns of the first spiral unit is 4, the number of turns of the second spiral unit is 1, and the length of the screw linear unit is 10 mm.
When the linear units are continuously spliced at different phase angles, the material exchange channels between different flow channels are open, and materials can be fully exchanged under the driving of a pressure gradient, so that the distribution mixing capacity of the extruder is improved, and the materials are efficiently mixed in the extruder.
Claims (5)
1. An extrusion device containing an eccentric screw is characterized by comprising a screw with a spiral section and a machine barrel with the spiral section; the circumferential section of the inner wall of the machine barrel of the spiral section is a short-amplitude circular outward-rotation wheel line; the spiral section screw rod rotates in the machine barrel, the revolution speed is n times of the rotation angular speed, and the circumferential section of the spiral section screw rod is a regular n-polygon surrounded by n same arc lines; the inner wall surface of the barrel of the spiral section is meshed with the screw of the spiral section; on the circumferential sections of the spiral section machine barrel and the spiral section screw rod, the spiral section screw rod divides the inner space of the extruder into n areas, and the two adjacent areas are communicated with the matching gap between the inner walls of the extruder through the top point of the rotor; the lead of the barrel of the rotating section is (n-1)/n times of the lead of the screw of the corresponding rotating section;
the extrusion device also comprises a linear section screw and a linear section cylinder, wherein the circumferential section of the inner wall of the linear section cylinder is a short-amplitude circular outward rotating wheel line, and the circumferential section of the linear section screw is a regular n-polygon surrounded by n identical arc lines;
the straight-line section screw and the straight-line section cylinder jointly form a straight-line section unit, the spiral section screw and the spiral section cylinder spiral section unit can be used in a combined mode;
the linear section units and the spiral section units are alternately arranged, so that the stretching and the compression of materials in the extrusion device can be strengthened;
the bulge of the inner wall surface of the spiral section machine barrel and the spiral edge of the spiral section screw are grooved, so that materials in different flow channels can be mixed with each other, and when pressure difference exists among the materials in the different flow channels, the materials can be forced to pass through the grooves, and the strength of the tensile flow is further improved.
2. The extrusion apparatus of claim 1, wherein n has a value of 3 or 4.
3. The extrusion apparatus as set forth in claim 1, wherein the screw of the screw section and the barrel of the screw section have a lead which is gradually increased or decreased to correspondingly achieve the stretching and compression of the material in the extrusion apparatus.
4. An extrusion device containing an eccentric screw is characterized by comprising a screw with a spiral section and a machine barrel with the spiral section; the circumferential section of the inner wall of the machine barrel of the spiral section is a short-amplitude circular outward-rotation wheel line; the spiral section screw rod rotates in the machine barrel, the revolution speed is n times of the rotation angular speed, and the circumferential section of the spiral section screw rod is a regular n-polygon surrounded by n same arc lines; the inner wall surface of the barrel of the spiral section is meshed with the screw of the spiral section; on the circumferential sections of the spiral section machine barrel and the spiral section screw rod, the spiral section screw rod divides the inner space of the extruder into n areas, and the two adjacent areas are communicated with the matching gap between the inner walls of the extruder through the top point of the rotor; the lead of the barrel of the rotating section is (n-1)/n times of the lead of the screw of the corresponding rotating section;
the extrusion device also comprises a linear section screw and a linear section cylinder, wherein the circumferential section of the inner wall of the linear section cylinder is a short-amplitude circular outward rotating wheel line, and the circumferential section of the linear section screw is a regular n-polygon surrounded by n identical arc lines;
the straight-line section screw and the straight-line section cylinder jointly form a straight-line section unit, the spiral section screw and the spiral section cylinder spiral section unit can be used in a combined mode;
the bulge of the inner wall surface of the spiral section machine barrel and the spiral edge of the spiral section screw are grooved, so that materials in different flow channels can be mixed with each other, and when pressure difference exists among the materials in the different flow channels, the materials can be forced to pass through the grooves, and the strength of the tensile flow is further improved;
the plurality of straight line segment units are continuously spliced at different phase angles, so that the shearing and back mixing of materials can be increased, and the distribution mixing performance of the extruder is enhanced.
5. An extruder, characterized in that it comprises an extrusion device comprising an eccentric screw according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111170858.9A CN113927871B (en) | 2021-10-08 | 2021-10-08 | Extrusion device containing eccentric screw and extruder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111170858.9A CN113927871B (en) | 2021-10-08 | 2021-10-08 | Extrusion device containing eccentric screw and extruder |
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| Publication Number | Publication Date |
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| CN113927871A CN113927871A (en) | 2022-01-14 |
| CN113927871B true CN113927871B (en) | 2022-08-05 |
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| CN202111170858.9A Active CN113927871B (en) | 2021-10-08 | 2021-10-08 | Extrusion device containing eccentric screw and extruder |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0002131A1 (en) * | 1977-11-19 | 1979-05-30 | Sekisui Kagaku Kogyo Kabushiki Kaisha | Improved self-cleaning type extruder |
| EP0850738A2 (en) * | 1996-12-24 | 1998-07-01 | KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. | Twin-screw kneading apparatus |
| CN2548790Y (en) * | 2002-06-24 | 2003-05-07 | 岑益南 | Planet monoscrewrod plastic extruder |
| US6783270B1 (en) * | 2000-07-31 | 2004-08-31 | Steer Engineering (P) Limited | Fractional and higher lobed co-rotating twin-screw elements |
| CN203739195U (en) * | 2014-01-17 | 2014-07-30 | 苏州美冠塑胶材料有限公司 | Novel screw extruder |
| CN112867843A (en) * | 2018-09-11 | 2021-05-28 | 勒托力提科技有限公司 | Seal in a spiral trochoid rotary machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106926430A (en) * | 2017-04-28 | 2017-07-07 | 广东轻工职业技术学院 | Rotating ratio is 2.5 self-clean type multi-screw extruder in the same direction and extrusion method |
| CN206967926U (en) * | 2017-04-28 | 2018-02-06 | 广东轻工职业技术学院 | Rotating ratio is 2.5 self-clean type multi-screw extruder in the same direction |
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2021
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| EP0002131A1 (en) * | 1977-11-19 | 1979-05-30 | Sekisui Kagaku Kogyo Kabushiki Kaisha | Improved self-cleaning type extruder |
| EP0850738A2 (en) * | 1996-12-24 | 1998-07-01 | KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. | Twin-screw kneading apparatus |
| US6783270B1 (en) * | 2000-07-31 | 2004-08-31 | Steer Engineering (P) Limited | Fractional and higher lobed co-rotating twin-screw elements |
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| CN113927871A (en) | 2022-01-14 |
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