CN108556303A - Double-wall corrugated effective corotating twin-screw plastic extrusion unit - Google Patents
Double-wall corrugated effective corotating twin-screw plastic extrusion unit Download PDFInfo
- Publication number
- CN108556303A CN108556303A CN201810347462.9A CN201810347462A CN108556303A CN 108556303 A CN108556303 A CN 108556303A CN 201810347462 A CN201810347462 A CN 201810347462A CN 108556303 A CN108556303 A CN 108556303A
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- Prior art keywords
- screw
- double
- twin
- wall corrugated
- machine barrel
- 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.)
- Granted
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 29
- 239000004033 plastic Substances 0.000 title claims abstract description 27
- 238000005299 abrasion Methods 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000008188 pellet Substances 0.000 abstract description 9
- 239000000843 powder Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 238000005469 granulation Methods 0.000 abstract description 4
- 230000003179 granulation Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 230000004323 axial length Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 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
- B29C48/625—Screws characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
-
- 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
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/402—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having intermeshing parts
-
- 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
- B29C48/682—Barrels or cylinders for twin screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2016/00—Articles with corrugations or pleats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/18—Pleated or corrugated hoses
Abstract
The present invention provides a kind of double-wall corrugated effective corotating twin-screw plastic extrusion unit, including the extra-high torsion gearbox of twin-screw, Split assembled machine barrel, combined threaded rod, combined threaded rod identical, identical screw rod of diameter including two root architectures, two shafts of combined threaded rod export axis connection, two groups of seperated combination machine cylinders that two groups of combined threaded rods outsides are respectively equipped with it coordinates with two of the extra-high torsion gearbox of twin-screw respectively.Present invention optimizes the prior arts, double-wall corrugated inner tube layer and outer layer plastic material can be provided simultaneously, it is simple in structure, plasticizing effect is good, granulation process is eliminated, the double-screw plastic extrusion machine group of pellet or powder production double-wall corrugated pipe can be used directly so that the plasticizing quality of double-wall corrugated pipe is increased substantially, tubing production cost is significantly reduced, and pipe workpiece quality is largely increased.
Description
Technical field
The invention belongs to plastic film capicitor manufacturing field, more particularly to a kind of double-wall corrugated effective corotating twin-screw modeling
Material squeezes out unit.
Background technology
Currently, most polyolefin double-walled plastic bellows productions generally use single-screw extruder in the market,
Part uses taper incongruous double screw plastic extruder, or uses single group parallel dual-screw plastic extruder.It is moulded with single screw rod
Expect that extruder produces polyolefin double-walled plastic bellows, the disadvantage is that, high energy consumption, formula adapts to force difference, cannot be directly raw with powder
Production, it is necessary to use pellet.Taper incongruous double screw plastic extruder can directly be produced with powder, the disadvantage is that, complicated, screw rod
Draw ratio is restricted (corresponding yield will be restricted), is directly produced using pellet big to screw rod damage.Screw rod service life
It can substantially reduce, and since screw slenderness ratio is short, plasticizing effect is poor.Using single group parallel dual-screw plastic extruder the disadvantage is that
Only there are one plastic extrusion machine heads for producing, and cannot meet while produce the condition of double-walled plastic bellows inside and outside wall, cost
It is excessively high.
Invention content
Technical problem solved by the invention is to provide one kind and eliminating granulation process, and pellet or powder life can be used directly
The double-screw plastic extrusion machine group for producing double-wall corrugated pipe improves the plasticizing quality of double-wall corrugated pipe, reduces production cost.
The technical solution adopted by the present invention is：A kind of double-wall corrugated effective corotating twin-screw plastic extrusion unit, packet
Include the extra-high torsion gearbox of twin-screw, Split assembled machine barrel, combined threaded rod, combined threaded rod identical, diameter phase including two root architectures
Two shafts of same screw rod, combined threaded rod export axis connections, two groups of groups with two of the extra-high torsion gearbox of twin-screw respectively
Close two groups of seperated combination machine cylinders being respectively equipped on the outside of screw rod with it coordinates.
Split assembled machine barrel from from extrusion to the extra-high torsion gearbox of twin-screw successively by the silent machine barrel of a high abrasion,
Three common silent machine barrels, " C " type opening machine barrel, the silent machine barrel of three high abrasions, a common silent machine barrel and one
The opening machine barrel combination of " C " type is connected by screw." C " type opening machine barrel is interior edge nickel-base alloy set, common silent machine barrel material
For interior cast nickel-base alloy, the silent machine barrel of high abrasion is entirety SKD11.The difference of different parts structure and material, it is therefore an objective to be
Under the premise of ensureing service life reduce cost.
The screw diameter of two groups of combined threaded rods is different, than another group combined threaded rod of screw diameter of one of which combined threaded rod
Screw diameter it is thick.
The draw ratio of combined threaded rod is 40:1, maximum speed 700r/min.
The unit is directly produced using one-step method (pellet+powder), mainly for the production of the poly- of a diameter of 200mm-800mm
Alkene double-wall corrugated pipe.Wherein, the thicker screw rod of diameter is used to produce the outer wall of double-wall corrugated pipe, and the thinner screw rod of diameter is used for
Produce the inner wall of double-wall corrugated pipe.
Combined threaded rod uses fabricated structure, is measured from extrusion to the extra-high torsion gearbox direction of twin-screw by plasticizing
Section, mixing section and transportation section combination are constituted.
From extrusion to the extra-high torsion gearbox direction of twin-screw, with the silent machine of unification high abrasion on the outside of plasticizing metering section
Cylinder, three common silent machine barrels, " C " type opening machine barrel, mixing section outside coordinates two silent machine barrels of high abrasion, transportation section
Outside is with the silent machine barrel of unification high abrasion, a common silent machine barrel and " C " type opening machine barrel.
From extrusion to the extra-high torsion gearbox direction of twin-screw, the modeling of one group of thicker screw rod of the combined threaded rod diameter
The model for changing metering root module is followed successively by three SF80/80, seven SF96/96, four SF128/128, is kneaded the type of root module
Number be followed successively by DG10,90 °/5/56,60 °/4/56,45 °/5/72,72/72, two 45 °/5/56,45 °/5/72,72/72,
45 °/5/56,30 °/7/72, convey root module model be followed successively by 72/72, three 96/96,112/56SKG, three 112/
112SK、56/56A。
From extrusion to the extra-high torsion gearbox direction of twin-screw, the modeling of the thinner one group of screw rod of combined threaded rod diameter
The model for changing metering root module is followed successively by two SF56/56, five SF72/72, four SF88/88, three SF112/112, mixes
Refining root module model be followed successively by DG10,90 °/5/56,60 °/4/44,45 °/5/56,56/56,90 °/5/56,45 °/5/44,
45 °/5/56, two 56/56,45 °/5/72,30 °/7/72, convey root module model be followed successively by three 56/56,64/64,
88/44SKG, three 88/88SK, 44/44A.
The invention has the advantages that optimizing the prior art, double-wall corrugated inner tube layer and outer layer modeling can be provided simultaneously
Expect material, simple in structure, screw speed is high, draw ratio is long, and plasticizing effect is good, eliminates granulation process, and pellet can be used directly
Or the double-screw plastic extrusion machine group of powder production double-wall corrugated pipe so that the plasticizing quality of double-wall corrugated pipe has obtained significantly
It improves, tubing production cost is significantly reduced, and pipe workpiece quality is largely increased.
Description of the drawings
Attached drawing 1 is double-wall corrugated effective corotating twin-screw plastic extruder schematic diagram.
Attached drawing 2 is double-wall corrugated effective corotating twin-screw plastic extruder primary structure vertical view.
Attached drawing 3 is combination machine barrel combining structure schematic diagram.
Attached drawing 4 is combined threaded rod structural schematic diagram.
Reference numeral：Extra-high torsion gearbox 2- Split assembleds machine barrel 3- combined threaded rods 4- " C " the type opening of 1- twin-screws
Commonly the transportation sections silent machine barrel 6- high abrasions silent machine barrel 7- 8- mixing sections 9- is plasticized metering section to machine barrel 5-
Specific implementation mode
The present invention is further explained below in conjunction with the accompanying drawings.Based on the embodiment of the present invention, ordinary skill people
The other embodiment that member is obtained without creative efforts, shall fall within the protection scope of the present invention.
As shown in Figure 1, Figure 2, the present invention is a kind of double-wall corrugated effective corotating twin-screw plastic extrusion unit, including double spiral shells
The extra-high torsion gearbox 1 of bar, Split assembled machine barrel 2, combined threaded rod 3, combined threaded rod 3 include that two root architectures are identical, diameter is identical
Screw rod, two shafts of combined threaded rod 3, two output axis connections with the extra-high torsion gearbox of twin-screw 1 respectively, two groups of groups
Close the two groups of seperated combination machine cylinders 2 that outside is respectively equipped with it coordinates of screw rod 3.
It is a kind of composite structure of Split assembled machine barrel 2 of the embodiment of the present invention such as Fig. 3, Split assembled machine barrel 2 is from extrusion
Mouthful at the extra-high torsion gearbox of twin-screw 1 successively by 6, three common silent machine barrels 5, one of the silent machine barrel of a high abrasion
The common silent machine barrel 5 of " C " type opening silent machine barrel 6, one of 4, three high abrasions of machine barrel and " C " type opening machine barrel 4 combine
It is bolted." C " type is open machine barrel 4 as interior edge nickel-base alloy set, and 5 material of common silent machine barrel is the interior Ni-based conjunction of cast
Gold, the silent machine barrel 6 of high abrasion are entirety SKD11.The difference of different parts structure and material, in order to ensure to use the longevity
Cost is reduced under the premise of life.
The draw ratio of combined threaded rod 3 is 40:1, maximum speed 700r/min.
The screw diameter of two groups of combined threaded rods 3 is different, than another group combination spiral shell of screw diameter of one of which combined threaded rod 3
The screw diameter of bar 3 is thick.The screw diameter of combined threaded rod 3 is respectively 72mm and 65mm in the present embodiment.
The unit is directly produced using one-step method (pellet+powder), mainly for the production of the poly- of a diameter of 200mm-800mm
Alkene double-wall corrugated pipe.Wherein, the screw rod of a diameter of 72mm is used to produce the outer wall of double-wall corrugated pipe, the screw rod of a diameter of 65mm
Inner wall for producing double-wall corrugated pipe.
Combined threaded rod 3 uses fabricated structure, is measured from extrusion to extra-high 1 direction of torsion gearbox of twin-screw by plasticizing
Section 9, mixing section 8 and the combination of transportation section 7 are constituted.Wherein, transportation section 7 is the screw thread module composition of n different size, mixing section 8
For the ladder module of n different angles and the screw thread block combiner composition of different size, plasticizing metering section 9 is n different size
Screw thread module forms.
From extrusion to extra-high 1 direction of torsion gearbox of twin-screw, 9 outside of plasticizing metering section is silent with unification high abrasion
" C " type of common silent machine barrel 5, one of machine barrel 6, three opening machine barrel 4,8 outside of mixing section coordinate two silent machine barrels of high abrasion
6,7 outside of transportation section is with unification 6, common silent machine barrels 5 of the silent machine barrel of high abrasion and " C " type opening machine barrel 4.
It is a kind of composite structure of combined threaded rod 3 of the embodiment of the present invention such as Fig. 4, from extrusion to the extra-high torsion of twin-screw
The model in 1 direction of square gear-box, plasticizing 9 module of metering section of one group of screw rod of 3 a diameter of 72mm of combined threaded rod is followed successively by three
The model of SF80/80, seven SF96/96, four SF128/128,8 module of mixing section are followed successively by DG10,90 °/5/56,60 °/4/
56,45 °/5/72,72/72, two 45 °/5/56,45 °/5/72,72/72,45 °/5/56,30 °/7/72,7 module of transportation section
Model be followed successively by 72/72, three 96/96,112/56SKG, three 112/112SK, 56/56A.
From extrusion to extra-high 1 direction of torsion gearbox of twin-screw, the modeling of one group of screw rod of 3 a diameter of 65mm of combined threaded rod
The model for changing 9 module of metering section is followed successively by two SF56/56, five SF72/72, four SF88/88, three SF112/112, mixes
Refining 8 module of section model be followed successively by DG10,90 °/5/56,60 °/4/44,45 °/5/56,56/56,90 °/5/56,45 °/5/44,
45 °/5/56, two 56/56,45 °/5/72,30 °/7/72, the model of 7 module of transportation section be followed successively by three 56/56,64/64,
88/44SKG, three 88/88SK, 44/44A.Above-mentioned screw thread module is described by the way of " helical pitch/axial length ", such as
(SF80/80) " SF " is the screw thread module code name (not specified is then standard thread module), and first " 80 " indicate to lead
Journey is 80mm, and second " 80 " indicate that axial length is 80mm.Ladder module is using " stagger arrangement angle/kneading disk quantity/module is long
The mode of degree " describes, such as (90 °/5/56) indicates that the ladder module is that the kneading disk for being 90 ° by 5 stagger arrangement angles is constituted
Axial length is the ladder module of 56mm.
Two kinds of screw rods are respectively adopted different fabricated structures, two kinds of screw-rod structures of announcement be basic structure type it
One, different structural adjustments is had according to formula variation.
As a result of special screw combinations, mixing internal mixing pass is strengthened, pellet or powder production can be used directly
Double-wall corrugated pipe eliminates granulation process.
When work, motor drives the extra-high torsion gearbox 1 of corotating twin-screw to rotate, and then drives special combination screw rod
3 rotations.Hopper is connected on " C " type opening machine barrel 4 on 2 the right of Split assembled machine barrel, and powder or pellet pass through top hopper
Into inside Split assembled machine barrel 2, transportation section 7, mixing section 8 and plasticizing are passed sequentially through by the rotation of special combination screw rod 3 and counted
Section 9 is measured, the inside and outside wall materials in the tube of polyolefin double-wall corrugated pipe are eventually formed.
The general principles defined herein can without departing from the spirit or scope of the present invention, in other realities
It applies in example and realizes.
Claims (8)
1. a kind of double-wall corrugated effective corotating twin-screw plastic extrusion unit, including the extra-high torsion gearbox of twin-screw (1),
Split assembled machine barrel (2), combined threaded rod (3), it is characterised in that：Combined threaded rod (3) includes that two root architectures are identical, diameter is identical
Screw rod, two shafts of combined threaded rod (3) export axis connections with two of the extra-high torsion gearbox of twin-screw (1) respectively, two groups
Two groups of seperated combination machine cylinders (2) that combined threaded rod (3) outside is respectively equipped with it coordinates.
2. double-wall corrugated effective corotating twin-screw plastic extrusion unit according to claim 1, it is characterised in that：It is described
Split assembled machine barrel (2) is at from extrusion to the extra-high torsion gearbox of twin-screw (1) successively by a silent machine barrel of high abrasion
(6), three common silent machine barrels (5), " C " type opening machine barrel (4), three silent machine barrels of high abrasion (6), one commonly close
Mouth machine barrel (5) and " C " type opening machine barrel (4) assemble and are connected by screw.
3. double-wall corrugated effective corotating twin-screw plastic extrusion unit according to claim 1, it is characterised in that：It is described
Combined threaded rod (3) uses fabricated structure, from extrusion to the extra-high torsion gearbox of twin-screw (1) direction by plasticizing metering section
(9), mixing section (8) and transportation section (7) combination are constituted.
4. double-wall corrugated effective corotating twin-screw plastic extrusion unit according to claim 1, it is characterised in that：It is described
The screw diameter of two groups of combined threaded rods (3) is different.
5. double-wall corrugated effective corotating twin-screw plastic extrusion unit according to claim 1, it is characterised in that：It is described
The draw ratio of combined threaded rod (3) is 40:1, maximum speed 700r/min.
6. double-wall corrugated effective corotating twin-screw plastic extrusion unit according to claim 3, it is characterised in that：From squeeze
Be exported to the extra-high torsion gearbox of twin-screw (1) direction, on the outside of plasticizing metering section (9) with the unification silent machine barrel of high abrasion (6),
Three common silent machine barrels (5), " C " type opening machine barrel (4), mixing section (8) outside coordinate two silent machine barrels of high abrasion
(6), with the unification silent machine barrel of high abrasion (6), a common silent machine barrel (5) and " C " type opening on the outside of transportation section (7)
Machine barrel (4).
7. double-wall corrugated effective corotating twin-screw plastic extrusion unit according to claim 3, it is characterised in that：From squeeze
It is exported to the extra-high torsion gearbox of twin-screw (1) direction, the plasticizing metering of one group of thicker screw rod of combined threaded rod (3) diameter
The model of section (9) module is followed successively by three SF80/80, seven SF96/96, four SF128/128, the type of mixing section (8) module
Number be followed successively by DG10,90 °/5/56,60 °/4/56,45 °/5/72,72/72, two 45 °/5/56,45 °/5/72,72/72,
45 °/5/56,30 °/7/72, the model of transportation section (7) module be followed successively by 72/72, three 96/96,112/56SKG, three 112/
112SK、56/56A。
8. double-wall corrugated effective corotating twin-screw plastic extrusion unit according to claim 3, it is characterised in that：From squeeze
It is exported to the extra-high torsion gearbox of twin-screw (1) direction, the plasticizing metering of the thinner one group of screw rod of combined threaded rod (3) diameter
The model of section (9) module is followed successively by two SF56/56, five SF72/72, four SF88/88, three SF112/112, mixing section
(8) model of module be followed successively by DG10,90 °/5/56,60 °/4/44,45 °/5/56,56/56,90 °/5/56,45 °/5/44,
45 °/5/56, two 56/56,45 °/5/72,30 °/7/72, the model of transportation section (7) module is followed successively by three 56/56,64/
64,88/44SKG, three 88/88SK, 44/44A.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018102499578 | 2018-03-26 | ||
| CN201810249957 | 2018-03-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108556303A true CN108556303A (en) | 2018-09-21 |
| CN108556303B CN108556303B (en) | 2023-11-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810347462.9A Active CN108556303B (en) | 2018-03-26 | 2018-04-18 | Co-directional parallel double-screw plastic extruder set for double-wall corrugated pipe |
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| CN (1) | CN108556303B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561722A (en) * | 2019-10-09 | 2019-12-13 | 南京杰恩特机电有限公司 | structure of equidirectional parallel double-screw extruder |
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| CN206230849U (en) * | 2016-12-07 | 2017-06-09 | 张家港市美特高分子材料有限公司 | A kind of TPV production double screw extruder |
| CN107627583A (en) * | 2017-10-31 | 2018-01-26 | 李庭裕 | A kind of plastic processing material-extruding machine |
| CN208576169U (en) * | 2018-03-26 | 2019-03-05 | 大连三垒科技有限公司 | Double-wall corrugated effective corotating twin-screw plastic extrusion unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561722A (en) * | 2019-10-09 | 2019-12-13 | 南京杰恩特机电有限公司 | structure of equidirectional parallel double-screw extruder |
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