CN102463666B - Twin-screw extruder and meshing disk element therefor - Google Patents
Twin-screw extruder and meshing disk element therefor Download PDFInfo
- Publication number
- CN102463666B CN102463666B CN201010547489.6A CN201010547489A CN102463666B CN 102463666 B CN102463666 B CN 102463666B CN 201010547489 A CN201010547489 A CN 201010547489A CN 102463666 B CN102463666 B CN 102463666B
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- Prior art keywords
- mesh plate
- plate element
- gear block
- block
- screw extruder
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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.)
- Expired - Fee Related
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- 239000000463 material Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- B29C48/505—Screws
- B29C48/585—Screws provided with gears interacting with the flow
-
- 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
- B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped elements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a twin-screw extruder and a meshing disk element therefor. The meshing disk element comprises n meshing blocks, wherein n is equal to or more than 2, torsion angles between every two end faces of the meshing blocks are different, and conveying capacity or pressing capacity of the meshing disk element is increased while the mixing quality of the meshing disk element is improved through regulating the torsion angles. The twin-screw extruder has better mixing quality and conveying capacity or pressing capacity.
Description
Technical field
The invention belongs to plastic processing machinery, relate to a kind of double screw extruder, be specifically related to a kind of mesh plate element for double screw extruder and double screw extruder.
Background technology
Extruder is a kind of common plastic processing machinery equipment, is widely used in the blended, filling-modified of polymer and extrusion molding.Extruder is divided into single screw extrusion machine, double screw extruder and multi-screw extruder by the quantity of its screw rod.Wherein, the feeding characteristic of double screw extruder is good, is applicable to raw material processing, and compare single screw extrusion machine have better mixing, exhaust, reaction and self-cleaning function.In addition, double screw extruder has significant advantage when the plastics of processing heat stability difference and blend composition.Therefore, in recent years, there is polytype double screw extruder, as engagement equidirectional parallel double-screw extruder, non-engagement equidirectional parallel double-screw extruder and antiparallel double screw extruder etc.
Engagement equidirectional parallel double-screw extruder is mainly used in the mixing and shaping of material, and it comprises machine barrel and is located at the screw rod of machine barrel inside, and wherein, screw rod comprises mixing elements and axle, and mixing elements is socketed in axle.At present, common mixing elements has mesh plate element and screwing element, and in actual applications, mesh plate element is used widely because its melting effect is better than screwing element.Fig. 1 is a kind of structural representation of traditional mesh plate element.Refer to Fig. 1, mesh plate element 1 comprises five pieces of gear blocks 11, and the stagger arrangement angle size between adjacent gear block 11 is identical, and namely centered by the axle of mesh plate element 1, it is identical that the phase contact surface of adjacent gear block 11 reverses the angle staggered.The symmetrical centre of gear block 2 is provided with the axis hole 12 with mating engagement.In actual use, the conveying capacity of this mesh plate element 1 pair of material is poor, and especially when stagger arrangement angle is 90 °, the conveying capacity of this mesh plate element is zero.
For this reason, technical staff improves mesh plate element.Fig. 2 is the structural representation of the mesh plate element after improving.Refer to Fig. 2, this mesh plate element is not only provided with stagger arrangement angle between adjacent gear block 11, and the certain angle that staggers is reversed in the face that two of every block gear block 11 are relative centered by the axle of mesh plate element 1, that is, each gear block 11 itself exists torsion angle.Although the mesh plate element 1 after improving makes its conveying capacity be improved by the torsion angle on gear block 11, but because the size of the torsion angle of every block gear block 11 is all identical, therefore, the mixing of the mesh plate element 1 after improvement declines to some extent.In addition, the mesh plate element 1 after improvement is monolithic construction, and for the mesh plate element 1 that structure is determined, namely its mixing, conveying capacity or upbuild voltage capacity are determined, can not again adjust.Therefore, there is the shortcoming of function singleness in integrally-built mesh plate element 1.
Summary of the invention
The technical problem to be solved in the present invention is exactly the above-mentioned defect existed for mesh plate element in engagement equidirectional parallel double-screw extruder, a kind of mesh plate element for double screw extruder is provided, this mesh plate element not only can improve conveying capacity, and can obtain high mixing.
For solving the problems of the technologies described above, the present invention also provides a kind of double screw extruder, and this double screw extruder not only conveying capacity is strong, and mixing is high.
The technical scheme adopted solved the problems of the technologies described above is to provide a kind of mesh plate element for double screw extruder, and comprise n block gear block, wherein, n is equal to or greater than 2, and the size of the torsion angle between two end faces of every block gear block is different.
Preferably, the size at the stagger arrangement angle between the phase contact surface of adjacent gear block is different.
Preferably, the size of described torsion angle is-20 ° ~+20 °, and wherein, observe from the direction of extruding of material, "-" represents left-handed, and "+" represents dextrorotation.
Preferably, the size at described stagger arrangement angle is-90 ° ~+90 °, and wherein, observe from the direction of extruding of material, "-" represents left-handed, and "+" represents dextrorotation.
Preferably, described n block gear block is independently element, and described mesh plate element is fabricated structure.
Preferably, there is following relation in the torsion angle in described mesh plate element and stagger arrangement angle:
k=1 or 2
Wherein, α represents the stagger arrangement angle between the phase contact surface of adjacent two gear blocks, and β represents the torsion angle between gear block two end faces, and n represents the sum of gear block in mesh plate element, k=1 represents around mesh plate element half cycle, and k=2 represents around mesh plate element one week.
Preferably, two end faces of described gear block are respectively equipped with positioning boss, for the axial location between adjacent described gear block.
Preferably, in the plane perpendicular to described mesh plate element axis, the projection of two end faces of described mesh plate element overlaps.
Preferably, described gear block is the gear block of single slurry type or two paddle type or three slurry types.
The present invention also provides a kind of double screw extruder, comprises axle and mesh plate element, is connected in described axle at described mesh plate element housing, and described mesh plate element adopts and the invention provides greatly described mesh plate element.
The present invention has following beneficial effect:
Provided by the invention in the mesh plate element of double screw extruder, varying in size of the torsion angle of each gear block, while raising mesh plate element mixing, conveying capacity or the upbuild voltage capacity of mesh plate element can be improved by the size changing the torsion angle of each gear block.Be specially: when the torsion angle of gear block is dextrorotation, the conveying capacity of mesh plate element can be improved, and the larger conveying capacity of the angle of torsion angle is stronger; When the torsion angle of gear block is left-handed, the upbuild voltage capacity of mesh plate element can be improved, and the larger upbuild voltage capacity of the angle of torsion angle is stronger; When left-handed gear block existing in mesh plate element, when having again the gear block of dextrorotation, the mixing ability of mesh plate element can be improved.
As a preferred embodiment of the present invention, in mesh plate element adjacent gear block phase contact surface between the size at stagger arrangement angle different, further while raising mesh plate element mixing, its conveying capacity or upbuild voltage capacity can be improved by the size at the stagger arrangement angle between the phase contact surface that changes adjacent gear block.
Similarly, double screw extruder provided by the invention, due to the varying in size of torsion angle of each the block gear block in mesh plate element, make mesh plate element can while raising mesh plate element mixing, obtain stronger conveying capacity or upbuild voltage capacity, correspondingly, this double screw extruder is made to obtain good mixing and conveying capacity or upbuild voltage capacity.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of traditional mesh plate element;
Fig. 2 is the structural representation of the mesh plate element after improving;
Fig. 3 is the structure chart of mesh plate element of the present invention;
Fig. 4 is the schematic diagram after mesh plate element of the present invention scatters in axle;
Fig. 5 is the sectional view of the gear block of mesh plate element of the present invention;
Fig. 6 is the top view after two mesh plate element engagements;
Fig. 7 is single-blade shape mesh plate component structure schematic diagram of the present invention; And
Fig. 8 is the present invention three oar shape mesh plate component structure schematic diagram.
Detailed description of the invention
For making those skilled in the art understand technical scheme of the present invention better, below in conjunction with accompanying drawing, the mesh plate element for double screw extruder provided by the invention and double screw extruder are described in detail.
Technical scheme of the present invention for convenience of description, in the present embodiment, torsion angle refers to the angle of two end faces rotational offset centered by the axle of mesh plate element of gear block.Stagger arrangement angle refers to the angle of phase contact surface rotational offset centered by the axle of mesh plate element of adjacent gear block.The direction of rotation of gear block is observed from extruding direction, and "-" represents left-handed, and "+" represents dextrorotation.The front end face of mesh plate element (gear block) refers to towards reader direction one side, and rear end face refers to reader direction one side dorsad.
Fig. 3 is the structure chart of mesh plate element of the present invention.Fig. 4 is the schematic diagram after mesh plate element of the present invention scatters in axle.See also Fig. 3 and Fig. 4, the composition element that mesh plate element 1 is made up of five pieces of discrete gear blocks, its symmetrical centre is provided with the axis hole 12 matched with axle 2.
In the present embodiment, stagger arrangement angle between each gear block of mesh plate element 1 is: the stagger arrangement angle between the first gear block 11a and the second gear block 11b is 32.5 °, stagger arrangement angle between second gear block 11b and the 3rd gear block 11c is 45 °, stagger arrangement angle between 3rd gear block 11c and the 4th gear block 11d is 55 °, and the stagger arrangement angle between the 4th gear block 11d and the 5th gear block 11e is 52.5 °.The torsion angle of gear block is: the torsion angle of the first gear block 11a, the second gear block 11b, the 3rd gear block 11c, the 4th gear block 11d and the 5th gear block 11e is respectively 7.5 °, 5 °, 0 ° ,-7.5 ° and-5 °.The present embodiment, the stagger arrangement angle between each gear block is dextrorotation, can improve the conveying capacity of mesh plate element 1.Meanwhile, the first dextrorotation of the torsion angle of five pieces of gear blocks 11 in mesh plate element 1, rear left-handed, like this, not only can improve the mixing ability of mesh plate element 1, and the upbuild voltage capacity of mesh plate element can be improved.
As shown in Figure 4, gear block 11 is sleeved in axle 2, and the outer peripheral edge of axle 2 is provided with tooth, and accordingly, the axis hole of gear block 11 is perforation, and the tooth in axle 2 matches with the perforation on gear block 11.When assembling gear block, in order to assemble gear block 11 according to designing requirement exactly, telltale mark 111 is provided with at an end face of each gear block, simultaneously, using the tooth of in axle 2 as positioning tooth 21, and be convenient to the mark of identification at positioning tooth 21 position mark, as reduced the height of positioning tooth 21.During installation, as long as make telltale mark 111 corresponding with the position of positioning tooth 21, can ensure that the stagger arrangement angle between adjacent gear block 11 meets design requirement.
Fig. 5 is the sectional view of the gear block of mesh plate element of the present invention, and Fig. 6 is the top view after two mesh plate element engagements.See also Fig. 5 and Fig. 6, groove 113 and boss 114 is respectively equipped with in the symmetric position of two end faces of gear block, groove 113 and boss 114 match, and for making gear block 11 locate in the radial direction of mesh plate element 1, thus make two mesh plate elements 1 engage rear maintenance gap S2.Simultaneously, in the symmetric position of two end faces of gear block, the first positioning boss 115 and the second positioning boss 116 is set respectively, first positioning boss 115 and the second positioning boss 116 for the axial location of gear block 11, to guarantee that adjacent gear block 11 keeps interval S 1 in the axis of mesh plate element 1.When designing mesh plate element, gap S1 and gap S2 uniformity can be made, to make the shear rate of each position of engagement identical in conjunction with clearance amendment theories such as full mesh theory and normal direction.By radial location and the axial location of gear block 11, two mesh plate elements can be avoided to interfere after engagement, thus guarantee the normal operation of double screw extruder, reduce the wearing and tearing between mesh plate element 1 simultaneously, and then improve the service life of mesh plate element 1.
In the present embodiment, mesh plate element 1 is combined by five pieces of gear blocks.In fact, mesh plate element 1 can select the gear block of any amount according to actual conditions, and, axle 2 can require to arrange the different mesh plate element 1 of one or more function according to concrete technology, as arranged the stronger mesh plate element of conveying capacity near twin-screw extrusion machine inlet capable and discharging opening position on screw rod, and the stronger mesh plate element of upbuild voltage capacity is set in the centre position of screw rod.Can exchange in axle to make mesh plate element 1, two end faces (i.e. the rear end face of the first gear block 11a and the front end face of the 5th gear block 11e) projection in the plane perpendicular to described mesh plate element 1 axis of mesh plate element 1 can overlap, i.e. stagger arrangement angle between each gear block of mesh plate element 1 and the torsion angle of each gear block should meet following relational expression:
k=1 or 2
In formula, α represents the stagger arrangement angle between adjacent two gear block phase contact surfaces, and β represents the torsion angle between gear block two end faces, and n represents the sum of gear block in mesh plate element, and k=1 represents around mesh plate element half cycle, and k=2 represents around mesh plate element one week.
In this enforcement, the scope at the stagger arrangement angle between the phase contact surface of adjacent gear block can be-90 ° ~+90 °, and the scope of the torsion angle between each gear block two end faces can be-20 ° ~+20 °, preferably-15 ° ~+15 °.When the torsion angle of gear block 11 is "+" (dextrorotation), the conveying capacity of mesh plate element 1 can be improved, and the larger conveying capacity of the angle of torsion angle is stronger; When the torsion angle of gear block is "-" (left-handed), the upbuild voltage capacity of mesh plate element 1 can be improved, and the angle of torsion angle (i.e. the absolute value of torsion angle) larger upbuild voltage capacity is stronger.Therefore, in actual applications, combination in same mesh plate element 1 can be had left-handed and gear block 11 that is dextrorotation two kinds of torsion angles, to make material realize shuttle axial backmixing in mesh plate element 1, thus improve the mixing ability of mesh plate element 1.In other words, the combined type mesh plate element of the present embodiment can realize conveying, build pressure and mixing several functions on limited axial length.
It should be noted that, the present embodiment is described for two oar shape gear block 11.But the present invention does not limit to therewith, the torsion angle that the present embodiment is mentioned and stagger arrangement angle vary in size and other correlated characteristic is equally applicable to the gear block that single-blade shape gear block or three starches shape gear blocks or other shape, and can obtain the technique effect identical with the present embodiment.By singly starching engaging element structures that shape gear block forms as shown in Figure 7, the structure of the engaged element be made up of three oar shape gear blocks as shown in Figure 8.
Also it should be noted that, the present embodiment mesh plate element 1 is fabricated structure, and namely each gear block is respective independently parts.But the present embodiment mesh plate element 1 also can adopt monolithic construction, the mesh plate element of monolithic construction is conducive to the assembling of double screw extruder.Be appreciated that when mesh plate element 1 is for monolithic construction, namely the upbuild voltage capacity of mesh plate element 1, conveying capacity and mixing have been determined, can not adjust it.
The present embodiment also provides a kind of double screw extruder, and it comprises machine barrel and is arranged on the screw rod in machine barrel, and screw rod comprises axle and is socketed in the multiple mesh plate elements in axle, and mesh plate element is mesh plate element provided by the invention.Due to the varying in size of torsion angle of each the block gear block in mesh plate element, make mesh plate element can while raising mesh plate element mixing, obtain stronger conveying capacity or upbuild voltage capacity, correspondingly, this double screw extruder is made to obtain good mixing and conveying capacity or upbuild voltage capacity.
Be understandable that, the illustrative embodiments that above embodiment is only used to principle of the present invention is described and adopts, but the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (7)
1. the mesh plate element for double screw extruder, comprise n block gear block, wherein, n is equal to or greater than 2, it is characterized in that, described n block gear block is independently element, described mesh plate element is fabricated structure, and wherein, the size of the torsion angle between two end faces of every block gear block is different, the size at the stagger arrangement angle between the phase contact surface of adjacent gear block is different, and torsion angle in described mesh plate element and stagger arrangement angle exist following relation:
k=1 or 2
Wherein, α represents the stagger arrangement angle between the phase contact surface of adjacent two gear blocks,
β represents the torsion angle between gear block two end faces,
N represents the sum of gear block in mesh plate element,
K=1 represents around mesh plate element half cycle, and k=2 represents around mesh plate element one week.
2. mesh plate element according to claim 1, is characterized in that, the size of described torsion angle is-20 ° ~+20 °, and wherein, observe from the direction of extruding of material, "-" represents left-handed, and "+" represents dextrorotation.
3. mesh plate element according to claim 1, is characterized in that, the size at described stagger arrangement angle is-90 ° ~+90 °, and wherein, observe from the direction of extruding of material, "-" represents left-handed, and "+" represents dextrorotation.
4. mesh plate element according to claim 1, is characterized in that, two end faces of described gear block are respectively equipped with positioning boss, for the axial location between adjacent described gear block.
5. mesh plate element according to claim 1, is characterized in that, in the plane perpendicular to described mesh plate element axis, the projection of two end faces of described mesh plate element overlaps.
6. the mesh plate element according to claim 1-5 any one, is characterized in that, described gear block is the gear block of single-blade type or two paddle type or three paddle type.
7. a double screw extruder, comprises axle and mesh plate element, is connected in described axle, it is characterized in that at described mesh plate element housing, and described mesh plate element adopts the mesh plate element described in claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010547489.6A CN102463666B (en) | 2010-11-17 | 2010-11-17 | Twin-screw extruder and meshing disk element therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010547489.6A CN102463666B (en) | 2010-11-17 | 2010-11-17 | Twin-screw extruder and meshing disk element therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102463666A CN102463666A (en) | 2012-05-23 |
| CN102463666B true CN102463666B (en) | 2015-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010547489.6A Expired - Fee Related CN102463666B (en) | 2010-11-17 | 2010-11-17 | Twin-screw extruder and meshing disk element therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102463666B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106514987B (en) * | 2016-10-24 | 2019-12-03 | 东莞市科亚新材料技术有限公司 | A kind of screw element manufacturing method of double screw extruder |
| CN114986847B (en) * | 2022-08-04 | 2022-11-01 | 南京力迅螺杆有限公司 | Twisted conveying type shear block for double-screw extruder |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1105315A (en) * | 1993-09-02 | 1995-07-19 | 维尔内和普弗雷德尔公司 | Screw element for a screw-type extrusion machine |
| KR100190725B1 (en) * | 1991-04-29 | 1999-06-01 | 스위셔 케드린 엠 | Continuous mixing of elastomeric compounds |
| DE60002980D1 (en) * | 1999-02-05 | 2003-07-03 | Coperion Werner & Pfleiderer | MULTI-WAVE SCREW EXTRUDER SOCKET AND EXTRUDER |
| CN2649302Y (en) * | 2003-06-25 | 2004-10-20 | 北京凤记科贸有限公司 | Disk extruding machine |
| CN1681637A (en) * | 2002-09-27 | 2005-10-12 | 贝斯托夫有限公司 | Extruder/gear pump assembly |
| CN1987104A (en) * | 2005-12-22 | 2007-06-27 | Vmi-Az挤塑设备有限公司 | Planetary gear pump |
| CN101037020A (en) * | 2006-03-10 | 2007-09-19 | 株式会社日本制钢所 | Kneading extruder |
| CN201881544U (en) * | 2010-11-17 | 2011-06-29 | 北京化工大学 | Double-screw extruder and meshing plate element for same |
-
2010
- 2010-11-17 CN CN201010547489.6A patent/CN102463666B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100190725B1 (en) * | 1991-04-29 | 1999-06-01 | 스위셔 케드린 엠 | Continuous mixing of elastomeric compounds |
| CN1105315A (en) * | 1993-09-02 | 1995-07-19 | 维尔内和普弗雷德尔公司 | Screw element for a screw-type extrusion machine |
| DE60002980D1 (en) * | 1999-02-05 | 2003-07-03 | Coperion Werner & Pfleiderer | MULTI-WAVE SCREW EXTRUDER SOCKET AND EXTRUDER |
| CN1681637A (en) * | 2002-09-27 | 2005-10-12 | 贝斯托夫有限公司 | Extruder/gear pump assembly |
| CN2649302Y (en) * | 2003-06-25 | 2004-10-20 | 北京凤记科贸有限公司 | Disk extruding machine |
| CN1987104A (en) * | 2005-12-22 | 2007-06-27 | Vmi-Az挤塑设备有限公司 | Planetary gear pump |
| CN101037020A (en) * | 2006-03-10 | 2007-09-19 | 株式会社日本制钢所 | Kneading extruder |
| CN201881544U (en) * | 2010-11-17 | 2011-06-29 | 北京化工大学 | Double-screw extruder and meshing plate element for same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102463666A (en) | 2012-05-23 |
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Granted publication date: 20150311 |