CN204936153U - A kind of screw support device and there is the double screw extruder of this device - Google Patents
A kind of screw support device and there is the double screw extruder of this device Download PDFInfo
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- CN204936153U CN204936153U CN201520681915.3U CN201520681915U CN204936153U CN 204936153 U CN204936153 U CN 204936153U CN 201520681915 U CN201520681915 U CN 201520681915U CN 204936153 U CN204936153 U CN 204936153U
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- screw
- screw support
- support element
- axle sleeve
- screw rod
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Abstract
The utility model provides a kind of screw support device and has the double screw extruder of this device, and screw support device comprises screw support element and axle sleeve, and screw support element and sleeve combination use, and are arranged in the axial same position of two screw mandrels respectively; With the center line of screw support element for axis, build the imaginary circles cylinder tangent with the spiral shell rib being provided with another root screw rod of axle sleeve in axial same position, distance to center line is more than or equal to the screw support componentry of virtual cylinder radius surface, and it is greater than zero with the axial distance of the axle sleeve two ends adjacent screws element combinationally used; The gap of screw support element in radial directions and between machine tube inner wall is less than the gap between the spiral shell rib of screw rod and machine tube inner wall.The double screw extruder of what the utility model provided have above-mentioned screw support device, supports two or more diverse locations of screw rod, thus eliminates the wearing and tearing between screw rod and machine barrel and between screw rod and screw rod.
Description
Technical field
The utility model relates to a kind of screw support device, particularly a kind of screw support device for double screw extruder, and has the double screw extruder of this device.
Background technology
The mixed performance of the polytropy that double screw extruder brings with its modular construction and adaptability and excellence, is widely applied in the polymer processing such as shaping, blended, modification, reactive extrursion.Double screw extruder mainly comprises transmission system, charging system, extrusion system, heating and cooling system, control system, and wherein extrusion system is the core of double screw extruder, mainly comprises screw rod and machine barrel.Material adds machine barrel by charging system, the rotation of machine barrel inner screw produces the effect such as helical feed and mixing to material, make material experience the extrusions such as Solid Conveying and Melting, melting, exhaust, mixing and melt Conveying, finally extruded by head, cause particle or be shaped to goods.
Screw rod is double screw extruder " heart ", and most of screw rod is modular construction, comprises mandrel, screw element and screw head, and screw element combination is arranged on mandrel, is tightened by screw head.Screw element comprises the function element such as delivery element, shearing elements, hybrid element, and different screw elements can be combined into the screw rod of different configuration.
The supporting way of screw rod adopts cantilever structure usually, and Support Position is at screw root, and screw root is connected with the output shaft of gear-box by adapter sleeve, and screw body and head are all unsettled in machine barrel.For guaranteeing conveying capacity and the upbuild voltage capacity of screw rod, the clearance control between the spiral shell rib of screw rod and machine barrel is (gap is generally 0.002 times of cylinder bore to 0.05 times) in very little scope.When the draw ratio material viscosity that is very large or that process of screw rod is lower or in machine barrel, material is inadequate, material in machine barrel is not enough to float screw rod, flexible deformation is there is in screw rod under the effect of self gravitation and centrifugal force etc., when the flexible deformation of screw rod is greater than the gap between the spiral shell rib of screw rod and machine tube inner wall, more serious wearing and tearing can be produced between the spiral shell rib of screw rod and machine tube inner wall, the gap between the spiral shell rib of screw rod and machine tube inner wall is increased.If wearing and tearing occur in melt zone, then cause melt capacity to decline, and cause non-uniform temperature and pressure oscillation; If wearing and tearing occur in melt conveying zone, melt Conveying ability can be made to decline; Gap between the spiral shell rib of screw rod and machine tube inner wall increases, and also can reduce the heat transference efficiency of machine barrel and storeroom.Meanwhile, the environment residing for two screw rods is also incomplete same, and the flexible deformation of two screw rods also can be inconsistent, causes the screw element on two screw rods to contact with each other, thus causes wearing and tearing, cutting, causes material flow uneven.
Utility model content
In view of this, the utility model provides a kind of screw support device for double screw extruder, this device comprises screw support element and axle sleeve, described screw support element and described sleeve combination use, be arranged on two screw mandrels respectively, and axial location on two screw rods is identical, a double screw extruder at least comprises screw support element described in two groups and described axle sleeve, each root screw rod is at least provided with a described screw support element and a described axle sleeve, as as described in first group, screw support element is arranged on the first screw rod, described axle sleeve is arranged on the second screw rod, the described screw support element of second group is then had to be arranged on the second screw rod, described axle sleeve is arranged on the first screw rod.
With the center line of described screw support element for axis, build the imaginary circles cylinder tangent with the spiral shell rib being provided with another root screw rod of described axle sleeve in axial same position, distance to center line is more than or equal to the described screw support componentry of described virtual cylinder radius surface, and it is greater than zero with the axial distance of the described axle sleeve two ends adjacent screws element combinationally used.As screw support element as described in being provided with on the first screw rod, then in the axial same position of the second screw rod, be provided with described axle sleeve, with the center line of described screw support element for axis, build the imaginary circles cylinder tangent with the spiral shell rib of the second screw rod, distance to center line is more than or equal to the described screw support componentry of described virtual cylinder radius surface, the axial distance of the described axle sleeve two ends adjacent screws element that itself and the second screw rod combinationally use is greater than zero, thus described screw support element is not contacted with the screw element on the second screw rod.
Described screw support element is arranged on screw mandrel together with other screw element (as delivery element, shearing elements, hybrid element etc.), gap in radial directions and between described machine tube inner wall is less than the gap between the spiral shell rib of described screw rod and described machine tube inner wall, when there is flexible deformation in described screw rod under the effect of self gravitation and centrifugal force etc., first described outer ring is crushed on described machine tube inner wall, described screw rod is played a supporting role, other screw element can not contact with described machine tube inner wall, thus eliminates the wearing and tearing between screw rod and machine barrel.
Further, radial clearance between described screw support element and the described axle sleeve combinationally used is less than the radial clearance between described two screw rods, when two described screw rod flexible deformations are inconsistent, first two described outer rings contact with each other, described screw rod is played a supporting role, other screw element on a screw rod can not be contacted with other screw element on another root screw rod, thus eliminate the wearing and tearing between screw rod and screw rod.
Further, described screw support element and (or) described axle sleeve are provided with fluid passage, so that material can pass through set fluid passage by which better, material from the gap between described axle sleeve and described machine barrel and described screw support element and described axle sleeve.
Further, lubrication groove is provided with, to relatively rotating lubricate at the outer surface of described screw support element and (or) the outer surface of described axle sleeve.
Further, described screw support element is provided with bearing, thus allows the outer surface of described screw support element and described machine barrel not to relatively rotate, and reduces the wearing and tearing of machine barrel further.Further, described machine barrel is provided with the structure of the outer surface rotation limiting described screw support element, and particularly, described machine barrel installs holding screw, the end of described holding screw withstands the outer surface of described screw support element; Or intermeshing structure is provided with on the outer surface of described machine tube inner wall and described screw support element.Further, the two ends of described screw support element are also provided with sealing device, described bearing is not contacted with material, improves the working environment of described bearing, improve its service life.
Further, described screw support element and described sleeve combination use, and on every root screw rod, are provided with screw element described in adjacent two groups between screw support element and described axle sleeve, so that convey materials better.
In addition, the utility model also provides a kind of double screw extruder, it is characterized in that this double screw extruder have employed above-mentioned screw support device, screw support element described in two or more sets and described axle sleeve have been installed, described screw support element and described sleeve combination use, be arranged in the axial same position of two screw rods respectively, each root screw rod is at least provided with a described screw support element and a described axle sleeve, two or more diverse locations of screw rod are supported, thus eliminates the wearing and tearing between screw rod and machine barrel and between screw rod and screw rod.
Screw support device of the present utility model is arranged on screw mandrel by building block system, does not affect the normal dismounting of screw rod, has following effect.
There is the double screw extruder of this screw support device, eliminate the wearing and tearing between screw rod and machine barrel and between screw rod and screw rod, extend the service life of screw rod and machine barrel, decrease downtime, reduce cost of equipment maintenance.
There is the double screw extruder of this screw support device, eliminate the wearing and tearing between screw rod and machine barrel and between screw rod and screw rod, especially for melt conveying zone, ensure that the upbuild voltage capacity of screw rod, be conducive to material smoothly by head, melt filtration net and mould, improve and extrude stability.
Have the double screw extruder of this screw support device, the draw ratio of screw rod can do to obtain very large (being greater than 120).Big L/D ratio double screw extruder has two-layer advantage: one, and when screw speed is constant, big L/D ratio can bring the longer time of staying.The prolongation of the time of staying is conducive to the abundant reaction of storeroom in reactive extrursion process, brings higher reactivity and better product quality; Be conducive to swelling in aramid fiber gel spinning, ultrahigh molecular weight polyethylene gel spinning and PAN base carbon fiber protofilament gel spinning technical process and the unwrapping to macromolecular chain ball of string winding arrangement.Its two, when the time of staying is constant, can screw speed be improved, thus improve the output of double screw extruder; Simultaneously the high-rate of shear that brings of high rotating speed, is conducive to the mixing of material, is conducive to the raising of quality of item.
Screw support device of the present utility model can be applicable to all types of double screw extruder, comprises parallel type in the same way, parallel incorgruous type, engagement type, half engagement type, non-engagement type, conical parallel dual type, the incorgruous type of taper etc.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Figure 1A is the double screw extruder cross-sectional schematic with the utility model screw support device;
Figure 1B is the double screw extruder partial schematic sectional view with the utility model screw support device;
Fig. 2 is the structural representation of screw support element and the axle sleeve combinationally used;
Fig. 3 A is provided with the screw support element of fluid passage and the structural representation of axle sleeve;
Fig. 3 B is the structural representation of the axle sleeve with fluid passage;
Fig. 4 is the structural representation that outer surface is provided with the axle sleeve of lubrication groove;
Fig. 5 A is the structural representation of the screw support element being provided with bearing;
Fig. 5 B is the structural representation being provided with bearing and having the spacing screw support element of holding screw;
Fig. 5 C is the structural representation being provided with bearing and having the spacing screw support element of engaging structure;
Fig. 5 D is the screw support component structure schematic diagram being provided with bearing and sealing device;
Fig. 6 is the partial schematic sectional view of the double screw extruder with four groups of screw support elements and axle sleeve.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can be defined by the claims and cover realizes and is not limited to embodiment as herein described.In addition, these embodiments are full disclosure the utility model, is convenient to the complete understanding of those skilled in the art to right.Clear for convenience of description, the size of level each in figure, area part and relative size have been carried out exaggerating process.In accompanying drawing, identical label represents identical element.
As shown in Figure 1A, in double screw extruder, power is provided by motor 70, torque distribution and deceleration is carried out through gear-box 60, screw rod 30(30 ˊ) be connected by the output shaft of adapter sleeve 50 with gear-box 60, material enters machine barrel 40 by charge door 40a, machine barrel 40 inner screw 30(30 ˊ) rotation the effect such as helical feed and mixing is produced to material, material is made to experience the extrusions such as Solid Conveying and Melting, melting, exhaust (being discharged by exhaust outlet 40b), mixing and melt Conveying, finally extruded by head 40c, cause particle or be shaped to goods.The screw support device of the present embodiment comprises two groups of screw support elements 10 and axle sleeve 20, screw support element 10 and axle sleeve 20 combinationally use, be arranged on two screw rod 30(30 ˊ respectively) mandrel 31 on, and at two screw rod 30(30 ˊ) on axial location identical, the screw support element 10 of first group is arranged on the first screw rod 30, axle sleeve 20 is arranged on the second screw rod 30 ˊ, the screw support element 10 of second group is arranged on the second screw rod 30 ˊ, axle sleeve 20 is arranged on the first screw rod 30, screw support element 10 and described axle sleeve 20 with other screw element 32(as delivery element, shearing elements, hybrid element etc.) be arranged on screw mandrel 31 together, tightened by screw head 33, screw support element 10 is identical with the mounting means of other screw element 32 with the mounting means of described axle sleeve 20 on mandrel 31, comprise polygon location, singly-bound, double bond, multikey, the modes such as spline, the following examples are only described with hexagon location.The clearance C 1 of screw support element 10 in radial directions and between machine barrel 40 inwall is less than screw rod 30(30 ˊ) spiral shell rib 32a and machine barrel 40 inwall between clearance C 2, screw rod 30(30 ˊ) when there is flexible deformation under the effect of self gravitation and centrifugal force etc., first screw support element 10 is crushed on the inwall of machine barrel 40, to screw rod 30(30 ˊ) play a supporting role, other screw element 32 can not with the contact internal walls of machine barrel 40, thus eliminate screw rod 30(30 ˊ) and machine barrel 40 between wearing and tearing, as shown in Figure 1B.
Further, radial clearance C3 between screw support element 10 and axle sleeve 20 is less than described two screw rod 30(30 ˊ) between radial clearance C4, two screw rod 30(30 ˊ) flexible deformation inconsistent time, first screw support element 10 and axle sleeve 20 contact with each other, to screw rod 30(30 ˊ) play a supporting role, other screw element 32 on first screw rod 30 can not be contacted with other screw element 32 on the second screw rod 30 ˊ, thus eliminate the wearing and tearing between the first screw rod 30 and the second screw rod 30 ˊ.
As shown in Figure 2, first screw rod 30 is provided with screw support element 10, then in the axial same position of the second screw rod 30 ˊ, be provided with axle sleeve 20, with the center line of screw support element 10 for axis, build the imaginary circles cylinder 10a tangent with the spiral shell rib 32a of the second screw rod 30 ˊ, distance to center line is more than or equal to the screw support componentry 10b of imaginary circles cylinder 10a radius, the axial distance H1(H2 of the axle sleeve 20 two ends adjacent screws element 32 that itself and the second screw rod 30 ˊ combinationally use) be greater than zero, thus screw support element 10 is not contacted with the screw element 32 on the second screw rod 30 ˊ.
Material further, screw support element 10 and (or) axle sleeve 20 is provided with fluid passage, so that can pass through set fluid passage by which better, material from the gap 20a between axle sleeve 20 and machine barrel 30 and screw support element 10 and axle sleeve 20.Be the embodiment being provided with fluid passage 10c and being provided with fluid passage 20b on screw support element 10 on axle sleeve 20 as shown in Figure 3A, on axle sleeve 20, set fluid passage 20b is blocked by the end face of the adjacent screw element 32 in two ends, axle sleeve 20 is provided with support portion 20c, fluid passage 20b is located on the 20c of support portion, support portion 20c both ends of the surface are to the axial distance H3(H4 of axle sleeve 20 both ends of the surface) be all greater than zero, after axle sleeve 20 and two ends adjacent screws element 32 are mutually adjacent to and are installed together, support portion 20c does not contact with two ends adjacent screws element 32, ensure that material can effectively by fluid passage 20b set on axle sleeve 20, as shown in Figure 3 B.
Further, being provided with lubrication groove at the outer surface of screw support element 10 and (or) the outer surface of axle sleeve 20, to relatively rotating lubricate, Figure 4 shows that the embodiment being provided with screw type lubrication groove 20d on axle sleeve 20.
Further, screw support element 10 is provided with bearing 12, thus allow the outer surface of screw support element 10 and machine barrel 40 not to relatively rotate, the wearing and tearing of further reduction machine barrel 40, embodiment as shown in Figure 5A, the bearing 12 that screw support element 10 comprises inner ring 11 and is arranged on inner ring 11, inner ring 11 is arranged on mandrel 31.Further, the structure that the outer surface that machine barrel 40 is provided with restriction screw support element 10 rotates, particularly, machine barrel 40 is installed holding screw 13, the end of holding screw 13 withstands the outer surface of screw support element 10, as shown in Figure 5 B; Or intermeshing structure is provided with on the outer surface of machine barrel 40 inwall and screw support element 10, embodiment as shown in Figure 5 C, the bearing 12 that screw support element 10 comprises inner ring 11 and is arranged on inner ring 11, also comprise the outer ring 14 being arranged on bearing 12 outer surface, outer ring 14 is established the structure 14a engaged with machine tube inner wall, thus the outer surface of screw support element 10 and machine barrel 40 do not produce relative rotation.Further, the two ends of screw support element 10 are also provided with sealing device, bearing 12 is not contacted with material, improve the working environment of bearing 12, improve its service life, as shown in the embodiment of Fig. 5 D, the bearing 12 that screw support element 10 comprises inner ring 11 and is arranged on inner ring 11, also comprise the sealing installing ring 16 and end cap 17 that are arranged on bearing 12 outer surface, sealing installing ring 16 and end cap 17 are equipped with seal 15, end cap 17 is arranged on sealing installing ring 16 by bolt 18, according to the product type of twin-screw extrusion machined, select that there is suitable heat resistance, the described seal 15 of decay resistance and compressive property.
Further, screw support element 10 and axle sleeve 20 combinationally use, at every root screw rod 30(30 ˊ) on, be provided with screw element 32 between two groups of adjacent screw support elements 10 and axle sleeve 20, so that convey materials better, as shown in Figure 1B.
Further, the screw support device that Fig. 1 enumerates comprises two groups of screw support elements 10 and axle sleeve 20, but screw support device is not limited to comprise two groups of screw support elements 10 and axle sleeve 20, but comprises two or more sets screw support elements 10 and axle sleeve 20.According to actual needs, screw support device comprises two or more sets screw support elements 10 and axle sleeve 20, to reach screw rod 30(30 ˊ) best support effect, as can with screw rod 30(30 ˊ) increase of draw ratio and increase the group number of screw support element 10 and axle sleeve 20, Fig. 6 lists the embodiment of having established four groups of screw support elements 10 and axle sleeve 20.
Above-mentioned screw support device can be applicable to all types of double screw extruder, comprises parallel type in the same way, parallel incorgruous type, engagement type, half engagement type, non-engagement type, conical parallel dual type, the incorgruous type of taper.
It should be noted that in addition, the screw support element 10 of above-mentioned different detailed description of the invention and axle sleeve 20 can be combined and be applied on same double screw extruder.In order to avoid unnecessary repetition, the utility model illustrates no longer separately to various possible Combination application mode.
In addition, the utility model also provides a kind of double screw extruder, this double screw extruder mainly comprises transmission system, charging system, extrusion system, heating and cooling system, control system, wherein extrusion system is the core of double screw extruder, mainly comprises screw rod 30(30 ˊ) and machine barrel 40.It is characterized in that, this double screw extruder have employed above-mentioned screw support device, to screw rod 30(30 ˊ) two or more diverse locations support, thus eliminate screw rod 30(30 ˊ) and machine barrel 40 between and wearing and tearing between the first screw rod 30 and the second screw rod 30 ˊ, there is following advantage.
There is the double screw extruder of this screw support device; eliminate screw rod 30(30 ˊ) and machine barrel 40 between and wearing and tearing between the first screw rod 30 and the second screw rod 30 ˊ; extend screw rod 30(30 ˊ) and service life of machine barrel 40, decrease downtime, reduce cost of equipment maintenance.
There is the double screw extruder of this screw support device, eliminate screw rod 30(30 ˊ) and machine barrel 40 between and wearing and tearing between the first screw rod 30 and the second screw rod 30 ˊ, especially for melt conveying zone, ensure that screw rod 30(30 ˊ) upbuild voltage capacity, be conducive to material smoothly by head 30c, melt filtration net and mould, improve and extrude stability.
There is the double screw extruder of this screw support device, screw rod 30(30 ˊ) draw ratio can do and to obtain very large (being greater than 120).Big L/D ratio double screw extruder has two-layer advantage: one, at screw rod 30(30 ˊ) rotating speed constant, big L/D ratio can bring the longer time of staying.The prolongation of the time of staying is conducive to the abundant reaction of storeroom in reactive extrursion process, brings higher reactivity and better product quality; Be conducive to swelling in aramid fiber gel spinning, ultrahigh molecular weight polyethylene gel spinning and PAN base carbon fiber protofilament gel spinning technical process and the unwrapping to macromolecular chain ball of string winding arrangement.Its two, when the time of staying is constant, screw rod 30(30 ˊ can be improved) rotating speed, thus improve the output of double screw extruder; Simultaneously the high-rate of shear that brings of high rotating speed, is conducive to the mixing of material, is conducive to the raising of quality of item.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement, all should be included within protection domain of the present utility model.
Claims (11)
1. a screw support device for double screw extruder, is characterized in that, comprises screw support element (10) and axle sleeve (20), and described screw support element (10) and described axle sleeve (20) combinationally use, and are arranged on two screw rods (30 respectively; 30 ˊ) mandrel (31) on, and at two screw rods (30; 30 ˊ) on axial location identical;
With the center line of described screw support element (10) for axis, build the imaginary circles cylinder (10a) tangent with the spiral shell rib (32a) being provided with another root screw rod of described axle sleeve (20) in axial same position, distance to center line is more than or equal to the described screw support componentry (10b) of described imaginary circles cylinder (10a) radius, itself and the axial distance (H1 at described axle sleeve (20) two ends adjacent screws element (32) combinationally used; H2) zero is greater than;
The gap (C1) of described screw support element (10) in radial directions and between described machine barrel (40) inwall is less than described screw rod (30; 30 ˊ) spiral shell rib (32a) and described machine barrel (40) inwall between gap (C2).
2. screw support device according to claim 1, is characterized in that, the radial clearance (C3) between described screw support element (10) and the described axle sleeve (20) combinationally used is less than described two screw rods (30; 30 ˊ) between radial clearance (C4).
3. screw support device according to claim 1, is characterized in that, described screw support element (10) or described axle sleeve (20) are provided with fluid passage (10c; 20b).
4. screw support device according to claim 1, is characterized in that, is provided with lubrication groove at the outer surface of described screw support element (10) or the outer surface of described axle sleeve (20).
5. screw support device according to claim 1, is characterized in that, described screw support element (10) is provided with bearing (12).
6. screw support device according to claim 5, is characterized in that, described machine barrel (40) is provided with the structure of the outer surface rotation limiting described screw support element (10).
7. screw support device according to claim 6, it is characterized in that, the structure that described machine barrel (40) is provided with the outer surface rotation limiting described screw support element (10) is, described machine barrel (40) is installed holding screw (13), and the end of described holding screw (13) withstands the outer surface of described screw support element (10);
Or intermeshing structure is provided with on the outer surface of described machine barrel (40) inwall and described screw support element (10).
8. screw support device according to claim 5, is characterized in that, the two ends of described screw support element (10) are provided with sealing device.
9. screw support device as claimed in any of claims 1 to 8, is characterized in that, described screw support device comprises screw support element (10) described in two or more sets and described axle sleeve (20).
10. screw support device according to claim 9, is characterized in that, at every root screw rod (30; 30 ˊ) on, be provided with screw element (32) between screw support element (10) and described axle sleeve (20) described in adjacent two groups.
11. 1 kinds of double screw extruders, is characterized in that, have the screw support device according to any one of claim 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520681915.3U CN204936153U (en) | 2015-09-06 | 2015-09-06 | A kind of screw support device and there is the double screw extruder of this device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520681915.3U CN204936153U (en) | 2015-09-06 | 2015-09-06 | A kind of screw support device and there is the double screw extruder of this device |
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| Publication Number | Publication Date |
|---|---|
| CN204936153U true CN204936153U (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520681915.3U Withdrawn - After Issue CN204936153U (en) | 2015-09-06 | 2015-09-06 | A kind of screw support device and there is the double screw extruder of this device |
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| Country | Link |
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| CN (1) | CN204936153U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105172101A (en) * | 2015-09-06 | 2015-12-23 | 湖南匡为科技有限公司 | Screw supporting device and twin-screw extruder with same |
-
2015
- 2015-09-06 CN CN201520681915.3U patent/CN204936153U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105172101A (en) * | 2015-09-06 | 2015-12-23 | 湖南匡为科技有限公司 | Screw supporting device and twin-screw extruder with same |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160106 Effective date of abandoning: 20171024 |