CN103057088B - Based on tensile deformation effect intensifying method and the screw rod of reverse eccentric two thread groove - Google Patents
Based on tensile deformation effect intensifying method and the screw rod of reverse eccentric two thread groove Download PDFInfo
- Publication number
- CN103057088B CN103057088B CN201210560816.0A CN201210560816A CN103057088B CN 103057088 B CN103057088 B CN 103057088B CN 201210560816 A CN201210560816 A CN 201210560816A CN 103057088 B CN103057088 B CN 103057088B
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- Prior art keywords
- thread groove
- spiral shell
- shell rib
- screw rod
- eccentric
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/64—Screws with two or more threads
- B29C48/65—Screws with two or more threads neighbouring threads or channels having different configurations, e.g. one thread being lower than its neighbouring thread
-
- 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
- B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses the tensile deformation effect intensifying method based on reverse eccentric two thread groove and screw rod.By setting up the secondary spiral shell rib lower than main spiral shell rib in singe screw thread groove, thread groove is divided into oppositely eccentric two thread groove, when utilizing screw rod to rotate, two thread groove degree of depth is periodically changed from small to big from large to small with 180 degree of phase differences again, and the tensile deformation effect of material in plasticizing transport process is reinforced.Realize the screw rod of the method by main spiral shell rib, secondary spiral shell rib and oppositely eccentric two thread grooves are formed, main spiral shell rib and secondary spiral shell rib spaced apart, adjacent thread groove symmetrically bias past relative to rotation is arranged; When screw rod rotates, material is carried by plasticizing with the gap change between thread groove and barrel, can enhanced drawing deformation effect.The present invention can realize the efficient plasticizing conveying of macromolecular material, reaches reduction energy consumption, reduces the effect of degraded.
Description
Technical field
The present invention relates to high polymer material plasticizing process and apparatus, specifically refer to that a kind of processing of high molecular material is with based on the tensile deformation effect intensifying method of reverse eccentric two thread groove and screw rod.
Technical background
Screw rod mechanism is the core that the macromolecular material generally adopted at present transports equipment, the axis Concentric rotation of the general and screw channel of spiral shell rib axis in screw rod mechanism, material plasticizing transports main by the effect of dragging to material during screw rod rotation, Solid Conveying and Melting is friction towing, melt Conveying is viscous drag, the velocity gradient of material is vertical with deformation direction with its flowing, and flowing is mainly arranged by shear stress with distortion.The mode of movement ubiquity plasticizing capacity of this common singe screw is poor, the defects such as energy consumption is high, material bad adaptability.Therefore usually take in screw rod mechanism to the solid conveying section of barrel fluting with increase and logistics frictional force, increases screw slenderness ratio, optimize the measures such as screw-rod structure and can solve the problem to a certain extent, but these measures certainly will cause again the shortcomings such as material plasticizing transports experienced thermomechanical course lengthening, device structure volume is large, material is easily degraded.
High molecular material blade plasticizing conveying equipment based on tensile deformation solves the problems referred to above, can realize thermomechanical course greatly to shorten, plasticizing transports energy consumption and reduces, the advantages such as transfer efficiency improves, material adaptability is extensive, but blade plasticizing conveying equipment part forms complicated, and mounting or dismounting are inconvenient.
Summary of the invention
The object of the invention is for Problems existing in above technology and equipment, a kind of tensile deformation effect intensifying method based on reverse eccentric two thread groove and screw rod are provided, energy consumption in processing of high molecular material process are high to solve, the problem such as device structure is complicated, material bad adaptability.
Object of the present invention is achieved through the following technical solutions:
A kind of tensile deformation effect intensifying method based on reverse eccentric two thread groove: when singe screw rotates, be full of the material of oppositely eccentric first thread groove and the second thread groove, periodically to change from small to big again from large to small with 180 degree of phase differences with the gap of the first thread groove and the second thread groove and barrel and be fed forward, the tensile deformation effect of material in plasticizing transport process is reinforced.
Tensile deformation effect strengthening screw rod based on reverse eccentric two thread groove: singe screw is provided with a main spiral shell rib for spiral, has additional secondary spiral shell rib in the spiral spacer of main spiral shell rib, and the diameter of secondary spiral shell rib is less than the diameter of main spiral shell rib; From the top of singe screw, form the first thread groove between main spiral shell rib and secondary spiral shell rib, and the second thread groove between secondary spiral shell rib and main spiral shell rib; Relative to the rotation of singe screw, the first thread groove is identical with the offset of the second thread groove and eccentric direction is contrary; Offset is greater than 0, is less than the radius of the first thread groove and the second thread groove and the difference of barrel radius.
Preferably offset is less than the radius of the first thread groove and the second thread groove and the difference of barrel radius, is greater than 1/5th of the radius of the first thread groove and the second thread groove and the difference of barrel radius.
The secondary spiral shell rib lower than main spiral shell rib is set up in singe screw thread groove of the present invention, thread groove is divided into oppositely eccentric two thread grooves spaced apart, adjacent thread groove is relative eccentric distribution relative to rotation, offset is identical and eccentric direction contrary, and eccentric amount e is greater than the difference that 0 is less than thread groove radius and barrel radius.When singe screw rotates, the volume between two thread groove and barrel periodically changes from small to big from diminishing greatly with the phase difference of 180 degree again.The material including two thread groove in not only pull with the friction of singe screw by barrel and carry, extrudes with volume change Tensile field of force plasticizing between thread groove and barrel simultaneously, material plastify transport in tensile deformation effect strengthened.
Relative to prior art, tool of the present invention has the following advantages:
1, plastify with classic screw and transport compared with conveying equipment, the thermomechanical field of force of plasticizing transport process shortens, and plasticizing transports energy consumption and reduces, good mixing effect.
2, compared with plastifying conveying equipment with blade, the tensile deformation effect strengthening screw rod mounting or dismounting that the present invention is based on oppositely eccentric two thread groove are convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of tensile deformation effect based on reverse eccentric thread groove strengthening screw rod;
Fig. 2 strengthens based on the tensile deformation effect of reverse eccentric two thread groove the structural representation that screw rod is applied to extrusion device;
Fig. 3 strengthens based on the tensile deformation effect of reverse eccentric two thread groove the structural representation that screw rod is applied to injection moulding apparatus.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further detailed, but the scope of protection of present invention is not limited to the scope of embodiment statement.
As shown in Figure 1, based on a tensile deformation effect strengthening screw rod for reverse eccentric two thread groove, comprise singe screw 8, singe screw 8 is provided with the main spiral shell rib 1 of spiral, have additional secondary spiral shell rib 2 in the spiral spacer of main spiral shell rib 1, the diameter of secondary spiral shell rib 2 is less than the diameter of main spiral shell rib 1; From the top of singe screw 8, form the first thread groove 3 between main spiral shell rib 1 and secondary spiral shell rib 2, and the second thread groove 4 between secondary spiral shell rib 2 and main spiral shell rib 1; Relative to rotation 5, first thread groove 3 and the second thread groove 4 oppositely bias of singe screw 8, offset is identical and eccentric direction is contrary; Namely the axis 6 of the first thread groove 3 and the second thread groove 4 is positioned at the two ends up and down of the rotation 5 of singe screw 8, and eccentric amount e is identical, and eccentric amount e is greater than 0 and is less than the first thread groove 3 and the radius of the second thread groove 4 and the difference of barrel 9 radius; Eccentric amount e is less than the first thread groove 3 and the radius of the second thread groove 4 and the difference of barrel 9 radius, is greater than 1/5th of the first thread groove 3 and the radius of the second thread groove 4 and the difference of barrel 9 radius; When singe screw 8 rotates, the volume between two thread groove that the first thread groove 3 and the second thread groove 4 are formed and barrel 9 periodically changes from small to big from diminishing greatly with the phase difference of 180 degree again.
A kind of tensile deformation effect intensifying method based on reverse eccentric two thread groove: when singe screw 8 rotates, be full of the material of oppositely eccentric first thread groove 3 and the second thread groove 4, periodically to change from small to big again from large to small with 180 degree phase differences with the gap of the first thread groove 3 and the second thread groove 4 and barrel 9 and be fed forward, material is reinforced in the tensile deformation effect in transport process that plastifies.
Embodiment 1
As shown in Figure 2, single screw extrusion machine comprises singe screw 8, barrel 9 and hopper 7.Singe screw 8 is placed in barrel 9, and hopper 7 and barrel 9 are connected by screw.Singe screw 8 is provided with the main spiral shell rib 1 of spiral, has additional secondary spiral shell rib 2 in the spiral spacer of main spiral shell rib 1, and the diameter of secondary spiral shell rib 2 is less than the diameter of main spiral shell rib 1; From the top of singe screw 8, form the first thread groove 3 between main spiral shell rib 1 and secondary spiral shell rib 2, and the second thread groove 4 between secondary spiral shell rib 2 and main spiral shell rib 1; Relative to rotation 5, first thread groove 3 and the second thread groove 4 oppositely bias of singe screw 8, offset is identical and eccentric direction is contrary; Eccentric amount e is greater than 0 and is less than the first thread groove 3 and the radius of the second thread groove 4 and the difference of barrel 9 radius; Eccentric amount e is less than the first thread groove 3 and the radius of the second thread groove 4 and the difference of barrel 9 radius, is greater than 1/5th of the first thread groove 3 and the radius of the second thread groove 4 and the difference of barrel 9 radius; When singe screw 8 rotates, the volume between two thread groove that the first thread groove 3 and the second thread groove 4 are formed and barrel 9 periodically changes from small to big from diminishing greatly with the phase difference of 180 degree again.
During single screw extrusion machine processing macro-molecular material, macromolecular material enters in barrel 9 from hopper 7, and rotates along with singe screw 8, is full of the gap of whole singe screw 8 and barrel 9, material, under main spiral shell rib 1 and the thrust of secondary spiral shell rib 2 and the effect of barrel 9 inner surface frictional force, is forced to outlet conveying.When singe screw 8 rotates, be arranged in the material of the second thread groove 4, with the gap descending ascending change of the second thread groove 4 with barrel 9, while material pulls shearing deformation effect by singe screw 8 and barrel 9, also by the volume extrusion stretching deformation effect caused by spatial variations; And be arranged in the material of the first thread groove 3, equally with the change in gap between the first thread groove 3 and barrel 9, tensile deformation effect suffered by material is strengthened.Macromolecule material is polished under the comprehensive function of the stretching field of force and shearing force field, compacting, exhaust, and under the booster action of barrel 9 external heat plastifying fusion, the external tapping moulded article by connecting with barrel 9 after having plastified.
Embodiment 2
As shown in Figure 3, injection device is primarily of having the singe screw 5 of stretching invigoration effect, injection cylinder 4, injection barrel 2, nozzle 1, hopper 3, and parts such as mold closing mechanism 6 grade form.Hopper 3 charging end face is fixedly connected with barrel 2, and injection cylinder 4 is fastenedly connected with injection singe screw 5, and singe screw 5 is placed in barrel 2 inner chamber.Only when screw rod 5 rotates, the material of barrel 2 is entered by barrel 2 external heat from hopper 3, plastified under shearing force field and the acting in conjunction of the enhanced drawing field of force with singe screw 5 simultaneously and carried, the melt plastified is stored within the measuring room of injection barrel 2 head, shrink back under the pressure effect of simultaneously singe screw 5 melt in measuring room, when the storing amount in injection barrel 2 reaches after goods require, singe screw 5 stops plasticizing, discharge injection pressure by injection cylinder 4 and promote singe screw 5 forward, material enters mold closing mechanism 6 cooling forming goods through nozzle 1, complete injection, enter the next process-cycle simultaneously.
It is also improve singe screw 5 that macromolecular material singe screw plasticizing transport tensile deformation effect strengthening device is applied to this injection device, singe screw 5 is provided with the main spiral shell rib of spiral, have additional secondary spiral shell rib in the spiral spacer of main spiral shell rib, the diameter of secondary spiral shell rib is less than the diameter of main spiral shell rib; From the top of singe screw 5, form the first thread groove between main spiral shell rib and secondary spiral shell rib, and the second thread groove between secondary spiral shell rib and main spiral shell rib; Relative to the rotation of singe screw 5, the first thread groove and the second thread groove oppositely eccentric, offset is identical and eccentric direction is contrary; Namely the axis of the first thread groove and the second thread groove is positioned at the two ends up and down of the rotation of singe screw, and offset is identical, and offset is greater than 0 and is less than the radius of the first thread groove and the second thread groove and the difference of barrel radius; Eccentric amount e is less than the radius of the first thread groove and the second thread groove and the difference of barrel radius, is greater than 1/5th of the radius of the first thread groove and the second thread groove and the difference of barrel radius; When singe screw 5 rotates, the volume between two thread groove that the first thread groove and the second thread groove are formed and barrel 2 periodically changes from small to big from diminishing greatly with the phase difference of 180 degree again.
Claims (3)
1. the tensile deformation effect intensifying method based on reverse eccentric two thread groove, it is characterized in that: when singe screw rotates, be full of the material of oppositely eccentric first thread groove and the second thread groove, periodically to change from small to big again from large to small with 180 degree of phase differences with the gap of the first thread groove and the second thread groove and barrel and be fed forward, the tensile deformation effect of material in plasticizing transport process is reinforced.
2. one kind realizes the tensile deformation effect strengthening screw rod based on reverse eccentric two thread groove of method described in claim 1, it is characterized in that: singe screw is provided with the main spiral shell rib of spiral, have additional secondary spiral shell rib in the spiral spacer of main spiral shell rib, the diameter of secondary spiral shell rib is less than the diameter of main spiral shell rib; From the top of singe screw, form the first thread groove between main spiral shell rib and secondary spiral shell rib, and the second thread groove between secondary spiral shell rib and main spiral shell rib; Relative to the rotation of singe screw, the first thread groove is identical with the offset of the second thread groove and eccentric direction is contrary; Offset is greater than 0, is less than the radius of the first thread groove and the second thread groove and the difference of barrel radius.
3. the tensile deformation effect strengthening screw rod based on reverse eccentric two thread groove according to claim 2, it is characterized in that: offset is less than the radius of the first thread groove and the second thread groove and the difference of barrel radius, be greater than 1/5th of the radius of the first thread groove and the second thread groove and the difference of barrel radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210560816.0A CN103057088B (en) | 2012-12-20 | 2012-12-20 | Based on tensile deformation effect intensifying method and the screw rod of reverse eccentric two thread groove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210560816.0A CN103057088B (en) | 2012-12-20 | 2012-12-20 | Based on tensile deformation effect intensifying method and the screw rod of reverse eccentric two thread groove |
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| Publication Number | Publication Date |
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| CN103057088A CN103057088A (en) | 2013-04-24 |
| CN103057088B true CN103057088B (en) | 2016-01-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106808667B (en) * | 2016-12-02 | 2018-09-25 | 湖北工业大学 | Shear plasticizing method in a kind of Wen Zhixiang alternations face |
| EP3473395B1 (en) | 2017-10-17 | 2021-03-10 | Buss AG | Asymmetrical three-blade screw-type shaft for a mixing and kneading machine |
| CN109249602A (en) * | 2018-10-16 | 2019-01-22 | 昆山兵仕机械有限公司 | A kind of extruder nature feeding mechanism |
| CN109666874B (en) * | 2018-12-28 | 2020-06-09 | 广州阿旺斯复合材料技术有限公司 | High-strength screw |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201746735U (en) * | 2010-07-26 | 2011-02-16 | 广东金明精机股份有限公司 | Extruder of stone paper production equipment |
| CN203031917U (en) * | 2012-12-20 | 2013-07-03 | 华南理工大学 | Drawing deformation reinforcing screw based on reverse eccentric double-thread grooves |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU923873A1 (en) * | 1980-04-07 | 1982-04-30 | Vnii Rezinotekh Mash | Extruder for processing plastic masses |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201746735U (en) * | 2010-07-26 | 2011-02-16 | 广东金明精机股份有限公司 | Extruder of stone paper production equipment |
| CN203031917U (en) * | 2012-12-20 | 2013-07-03 | 华南理工大学 | Drawing deformation reinforcing screw based on reverse eccentric double-thread grooves |
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| CN103057088A (en) | 2013-04-24 |
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Granted publication date: 20160120 Termination date: 20211220 |