CN204222134U - Parallel dual-screw extruding machine screw rod - Google Patents
Parallel dual-screw extruding machine screw rod Download PDFInfo
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- CN204222134U CN204222134U CN201420576592.7U CN201420576592U CN204222134U CN 204222134 U CN204222134 U CN 204222134U CN 201420576592 U CN201420576592 U CN 201420576592U CN 204222134 U CN204222134 U CN 204222134U
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- toothed disc
- screw rod
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Abstract
Parallel dual-screw extruding machine screw rod, belongs to high polymer material extruder apparatus field.Comprise melting mixing dispersion section (A), conversion zone (B) and the measure and shape section (C) that set gradually, melting mixing dispersion section (A) comprises the forward screwing element (2) and kneading member (3) that are axially alternately arranged; Conversion zone (B) comprises forward screwing element (2), kneading member (3) and turbine mixing element, and forward screwing element (2) and kneading member (3) are positioned at the upstream of turbine mixing element, are provided with narrow pitch screwing element (5) at the entrance of turbine mixing element; Wherein the pitch of narrow pitch screwing element (5) is less than the pitch of forward screwing element (2).Mixed and modified for the reaction of the macromolecular material of high fluidity dispersion and reaction front and back two steps of being divided into are completed, does not occur before being uniformly dispersed between reactant or less generation chemical reaction, make the performance of product even.
Description
Technical field
Parallel dual-screw extruding machine screw rod, belongs to high polymer material extruder apparatus field.
Background technology
The screw rod of the conventional extruders that processing of high molecular material uses usually is divided into transportation section, fluxing zone and extrudes metering section, fluxing zone mainly plays plasticizing and peptizaiton, the most important parts of screw rod, generally all combined according to material properties by kneading member at present, can be applicable to the processing of multiple macromolecular material.But the macromolecular material that this conventional extruders is processed with the high fluidity high melt flow rate (MFR) of chemical reaction has following defect: the effect of dragging of material material under the kneading member shearing force of conventional extruders of high fluidity is poor, dispersion between each material is distributed rendering weak effect particularly, contact interface between the material of participation reaction is little, time of contact is short, is unfavorable for chemical reaction; The each material participating in reaction is difficult to complete the task of dispersion and chemical reaction two self-contained process simultaneously at fluxing zone, reactant just may have the generation of other chemical reaction before reaching certain dispersity, and its performance of the product obtained must be uneven.
Summary of the invention
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, a kind of filling extent improving high fluidity material is provided, increase mixed effect, and then improve efficiency and the uniformity of product reaction, complete the parallel dual-screw extruding machine screw rod of the chemical reaction of the reaction mass with high fluidity.
The utility model solves the technical scheme that its technical problem adopts: this parallel dual-screw extruding machine screw rod, it is characterized in that: comprise the melting mixing dispersion section, conversion zone and the measure and shape section that set gradually, melting mixing dispersion section end is connected with conversion zone by the first reverse-flight elements, and conversion zone end connects measure and shape section by the second reverse-flight elements;
Melting mixing dispersion section comprises the forward screwing element and kneading member that are axially alternately arranged; Conversion zone comprises forward screwing element, kneading member and turbine mixing element, and forward screwing element and kneading member are positioned at the upstream of turbine mixing element, is provided with narrow pitch screwing element at the entrance of turbine mixing element; Measure and shape section comprises forward screwing element;
Wherein the pitch of narrow pitch screwing element is less than the pitch of forward screwing element.
Forward screwing element in melting mixing dispersion section provides the pressure promoting material and advance, and kneading member makes material melts, mixing, dispersion, completes the conveying of material, melting, mixing dispersion process, turbine mixing element in conversion zone is a kind of hybrid element, and be made up of one or a series of toothed fluted disc, in non-region of engagement, tooth can be shunted, and increases interface. be conducive to distributed rendering, in region of engagement, tooth due to the turbine mixing element on a screw rod extend between turbine mixing element two toothrow of another root screw rod, thus the stream flowed out by between cog can be cut in the vertical direction, this is very beneficial for distributed rendering, and gap between the turbine mixing element of two screw rods is very little, very large shear rate can be produced, also dispersion mixing is conducive to, mixed and modified for the reaction of the macromolecular material of high fluidity dispersion and reaction front and back two steps of being divided into complete by the utility model, do not occur before being uniformly dispersed between reactant or less generation chemical reaction, make the performance of product even, first reverse-flight elements and the second reverse-flight elements are used for regulating pressure, are convenient to exhaust, make material transmission in the other direction simultaneously, increase mixed effect further.
Preferably, described turbine mixing element comprises the first toothed disc and the second toothed disc, the axes normal of the first toothed disc and forward screwing element, second toothed disc is obliquely installed, and incline direction is identical with the hand of spiral of forward screwing element, between the first toothed disc and the second toothed disc, be provided with narrow pitch screwing element.Adopt the mode that the first toothed disc, the second toothed disc and narrow pitch screwing element are alternately arranged, improve the filling extent of high melt mass flow rate material, ensure that high melt mass flow rate material has the energy needed for certain elasticity and distributed rendering, add its mixed effect, and the contact interface improved between reactant, and then improve efficiency and the uniformity of material melts reaction, complete the chemical reaction of the reaction mass with mobility.
Preferably, described second toothed disc is positioned at the downstream of the first toothed disc.Material needs larger pressure differential by the tooth in the first toothed disc, the pressure differential needed by the tooth in the second toothed disc is relatively little, second toothed disc is arranged on the downstream of the first toothed disc, only needing, the shorter narrow pitch screwing element of distance is set between the second toothed disc with the first toothed disc and just can improve enough pressure differentials, thus reduce the spacing of the second toothed disc and the first toothed disc, be convenient to the abundant mixing of material.
Preferably, the tooth in described first toothed disc is helical teeth, and the incline direction of helical teeth is identical with the hand of spiral of forward screwing element.
Preferably, the draw ratio of described melting mixing dispersion section is more than or equal to 18, and the draw ratio of conversion zone is more than or equal to 22, and the draw ratio of measure and shape section is more than or equal to 8.Material can be made in the sufficient melting of melting mixing dispersion section, mixing, dispersion, and have enough times of contact at conversion zone, fully react, the product performance obtained is even.
Preferably, in described melting mixing dispersion section, the draw ratio of forward screwing element is more than or equal to 11, and the draw ratio of kneading member is more than or equal to 6.5.Material is fully disperseed, thus ensures that material fully reacts at conversion zone.
Preferably, the draw ratio of described first reverse-flight elements and the second reverse-flight elements is 0.5.
Preferably, the diameter of described forward screwing element, the first reverse-flight elements, the second reverse-flight elements, narrow pitch screwing element and turbine mixing element is D, and the pitch of described narrow pitch screwing element is 0.25 ~ 0.5D.Narrow pitch screwing element can provide enough pressure differentials to come by turbine mixing element for material, reduces the length of screw rod.
Preferably, the total length of described turbine mixing element is 4D, and the length of narrow pitch screwing element is 1D.
Compared with prior art, the beneficial effect that the utility model has is:
1, mixed and modified for the reaction of the macromolecular material of high fluidity dispersion and reaction front and back two steps of being divided into are completed, do not occur before being uniformly dispersed between reactant or less generation chemical reaction, be applicable to the reaction hybrid process of high fluidity macromolecular material.Mixing can be divided into dispersion mixing and distributed rendering, dispersion mixes the particle size that can reduce in polymeric matrix, distributed rendering makes particle realize homogenising in the distribution in space, forward screwing element in melting mixing dispersion section provides the pressure promoting material and advance, kneading member makes material melts, mixing, dispersion, complete the conveying of material, melting, mixing dispersion process, material fully disperses mixing, but material does not react in the process; Turbine mixing element in conversion zone is a kind of hybrid element, and be made up of one or a series of toothed fluted disc, in non-region of engagement, tooth can be shunted, and increases interface. be conducive to distributed rendering; In region of engagement, tooth due to the turbine mixing element on a screw rod extend between turbine mixing element two toothrow of another root screw rod, thus the stream flowed out by between cog can be cut in the vertical direction, this is very beneficial for distributed rendering, and gap between the turbine mixing element of two screw rods is very little, can produce very large shear rate, also be conducive to dispersion mixing, each material overcoming the reaction of existing extruder is difficult to complete the shortcoming of dispersion and chemical reaction two self-contained process simultaneously at fluxing zone.
2, the mode that the first toothed disc, the second toothed disc and narrow pitch screwing element are alternately arranged is adopted, improve the filling extent of high melt mass flow rate (MFR) material, ensure that high melt mass flow rate material has the energy needed for certain elasticity and distributed rendering, add its mixed effect, and the contact interface improved between reactant, and then improve efficiency and the uniformity of material melts reaction, complete the chemical reaction of the reaction mass with high fluidity.
3, the draw ratio of melting mixing dispersion section is more than or equal to 18, the draw ratio of conversion zone is more than or equal to 22, the draw ratio of measure and shape section is more than or equal to 8, material can be made in the sufficient melting of melting mixing dispersion section, mixing, dispersion, at conversion zone, there is enough times of contact, abundant reaction, the product performance obtained is even.
Accompanying drawing explanation
Fig. 1 is the structural representation of this parallel dual-screw extruding machine screw rod embodiment 1.
Fig. 2 is the structural representation of this parallel dual-screw extruding machine screw rod embodiment 2.
Wherein: the dispersion of A, melting mixing section B, conversion zone C, measure and shape section 1, screw shaft 2, forward screwing element 3, kneading member 4, first reverse-flight elements 5, narrow pitch screwing element 6, first toothed disc 7, second toothed disc 8, second reverse-flight elements.
Detailed description of the invention
Fig. 1 is the most preferred embodiment of this parallel dual-screw extruding machine screw rod, is described further below in conjunction with accompanying drawing 1 ~ 2 pair of the utility model.
Embodiment 1
With reference to Fig. 1, this parallel dual-screw extruding machine screw rod, comprise screw shaft 1, screw shaft 1 is arranged with forward screwing element 2, kneading member 3, turbine mixing element and narrow pitch screwing element 5, screw rod is divided in order to melting mixing dispersion section A along Flow of Goods and Materials direction, conversion zone B and measure and shape section C, melting mixing dispersion section A end is connected with conversion zone B by the first reverse-flight elements 4, conversion zone B end connects measure and shape section C by the second reverse-flight elements 8, first reverse-flight elements 4 and the second reverse-flight elements 8 are used for regulating pressure, be convenient to exhaust, make material transmission in the other direction simultaneously, further increase mixed effect.The draw ratio of screw rod is more than or equal to 48, and wherein the draw ratio of melting mixing dispersion section A is more than or equal to 18, and the draw ratio of conversion zone B is more than or equal to 22, and the draw ratio of measure and shape section C is more than or equal to 8.
Melting mixing dispersion section A comprises the forward screwing element 2 and kneading member 3 that are axially alternately arranged, wherein the draw ratio of forward screwing element 2 is more than or equal to 11, the draw ratio of kneading member 3 is more than or equal to 6.5, forward screwing element 2 provides the pressure promoting material and advance, kneading member 3 makes material melts, mixing, dispersion, complete the conveying of material, melting, mixing dispersion process, kneading member 3 is made up of multiple kneading block chosen according to material characteristic.
Conversion zone B comprises forward screwing element 2, kneading member 3 and turbine mixing element, conversion zone B has two groups of turbine mixing element, the upstream of turbine mixing element is respectively equipped with forward screwing element 2 and kneading member 3, and forward screwing element 2 is positioned at the upstream of kneading member 3, described turbine mixing element comprises the first toothed disc 6 and the second toothed disc 7, narrow pitch screwing element 5 is provided with at the entrance of turbine mixing element, start as material supercharging by forward screwing element 2 and kneading member 3, then pressure is increased further by narrow pitch screwing element 5, material is made to have enough pressure to pass through turbine mixing element, the axes normal of the first toothed disc 6 and forward screwing element 2, second toothed disc 7 is obliquely installed, and incline direction is identical with the hand of spiral of forward screwing element 2, narrow pitch screwing element 5 is provided with between first toothed disc 6 and the second toothed disc 7, adopt the first toothed disc 6, the mode that second toothed disc 7 is alternately arranged with narrow pitch screwing element 5, improve the filling extent of high melt mass flow rate (MFR) material, ensure that high melt mass flow rate material has the energy needed for certain elasticity and distributed rendering, add its mixed effect, and the contact interface improved between reactant, and then improve efficiency and the uniformity of material melts reaction, complete the chemical reaction of the reaction mass with high melting means.Preferably, described second toothed disc 7 is positioned at the downstream of the first toothed disc 6, material needs larger pressure differential by the tooth in the first toothed disc 6, the pressure differential needed by the tooth in the second toothed disc 7 is relatively little, second toothed disc 7 is arranged on the downstream of the first toothed disc 6, only needing, the shorter narrow pitch screwing element 5 of distance is set between the second toothed disc 7 with the first toothed disc 6 and just can improve enough pressure differentials, thus reduce the spacing of the second toothed disc 7 and the first toothed disc 6, be convenient to the abundant mixing of material.Tooth in this programme in the first toothed disc 6 is helical teeth, and the incline direction of helical teeth is identical with the hand of spiral of forward screwing element 2, also the tooth in the first toothed disc 6 can be set to straight-tooth.
The outside diameter of forward screwing element 2, first reverse-flight elements 4, second reverse-flight elements 8, narrow pitch screwing element 5 and turbine mixing element is D, the pitch of forward screwing element 2 is 0.5 ~ 2D, the pitch of narrow pitch screwing element 5 is 0.25 ~ 0.5D, narrow pitch screwing element 5 can provide enough pressure differentials to come by turbine mixing element for material, reduces the length of screw rod.The length of the first toothed disc 6 and the second toothed disc 7 is 4D, and the length of narrow pitch screwing element 5 is 1D.The draw ratio of the first reverse-flight elements 4 and the second reverse-flight elements 8 is 0.5.Measure and shape section C comprises forward screwing element 2.
The course of work: material is through melting mixing dispersion section A, forward screwing element 2 provides the pressure promoting material and advance, kneading member 3 makes dispersion, complete the conveying of material, melting, mixing dispersion process, conversion zone B is entered through the first reverse-flight elements 4 after material fully disperses, material is successively through forward screwing element 2 and kneading member 3, the pressure of material is increased gradually by zero, then material enters multiple first toothed disc 6 after narrow pitch screwing element 5, first toothed disc 6 of two screw rods is interlocked, material is cut in the vertical direction of the first toothed disc 6 between cog, and then the second toothed disc 7 is entered after narrow pitch screwing element 5 again supercharging, second toothed disc 7 tilts, there is certain towing conveying effect, then material enters next group turbine mixing element through forward screwing element 2 and kneading member 3, reach abundant mixing, the effect of reaction, thus obtain the product that performance all has, eventually pass measure and shape section C to export.
Embodiment 2
With reference to Fig. 2, the difference of the present embodiment and embodiment 1 is: the second toothed disc 7 is positioned at the upstream of the first toothed disc 6, and the second toothed disc 7 has certain towing conveying effect, and then after narrow pitch screwing element 5, enter the first toothed disc 6.Other structures are with embodiment 1.
Turbine mixing element in the utility model can adopt the one in the first toothed disc 6 and the second toothed disc 7.
The above, it is only preferred embodiment of the present utility model, be not restriction the utility model being made to other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the Equivalent embodiments of equivalent variations.But everyly do not depart from technical solutions of the utility model content, any simple modification, equivalent variations and the remodeling done above embodiment according to technical spirit of the present utility model, still belong to the protection domain of technical solutions of the utility model.
Claims (9)
1. a parallel dual-screw extruding machine screw rod, it is characterized in that: comprise melting mixing dispersion section (A), conversion zone (B) and the measure and shape section (C) that set gradually, melting mixing dispersion section (A) end is connected with conversion zone (B) by the first reverse-flight elements (4), and conversion zone (B) end connects measure and shape section (C) by the second reverse-flight elements (8);
Melting mixing dispersion section (A) comprises the forward screwing element (2) and kneading member (3) that are axially alternately arranged; Conversion zone (B) comprises forward screwing element (2), kneading member (3) and turbine mixing element, and forward screwing element (2) and kneading member (3) are positioned at the upstream of turbine mixing element, are provided with narrow pitch screwing element (5) at the entrance of turbine mixing element; Measure and shape section (C) comprises forward screwing element (2);
Wherein the pitch of narrow pitch screwing element (5) is less than the pitch of forward screwing element (2).
2. parallel dual-screw extruding machine screw rod according to claim 1, it is characterized in that: described turbine mixing element comprises the first toothed disc (6) and the second toothed disc (7), the axes normal of the first toothed disc (6) and forward screwing element (2), second toothed disc (7) is obliquely installed, and incline direction is identical with the hand of spiral of forward screwing element (2), between the first toothed disc (6) and the second toothed disc (7), be provided with narrow pitch screwing element (5).
3. parallel dual-screw extruding machine screw rod according to claim 2, is characterized in that: described second toothed disc (7) is positioned at the downstream of the first toothed disc (6).
4. the parallel dual-screw extruding machine screw rod according to Claims 2 or 3, is characterized in that: the tooth on described first toothed disc (6) is helical teeth, and the incline direction of helical teeth is identical with the hand of spiral of forward screwing element (2).
5. parallel dual-screw extruding machine screw rod according to claim 1, it is characterized in that: the draw ratio of described melting mixing dispersion section (A) is more than or equal to 18, the draw ratio of conversion zone (B) is more than or equal to 22, and the draw ratio of measure and shape section (C) is more than or equal to 8.
6. parallel dual-screw extruding machine screw rod according to claim 1, is characterized in that: in described melting mixing dispersion section (A), the draw ratio of forward screwing element (2) is more than or equal to 11, and the draw ratio of kneading member (3) is more than or equal to 6.5.
7. parallel dual-screw extruding machine screw rod according to claim 1, is characterized in that: described first reverse-flight elements (4) is 0.5 with the draw ratio of the second reverse-flight elements (8).
8. parallel dual-screw extruding machine screw rod according to claim 1, it is characterized in that: the diameter of described forward screwing element (2), the first reverse-flight elements (4), the second reverse-flight elements (8), narrow pitch screwing element (5) and turbine mixing element is D, and the pitch of described narrow pitch screwing element (5) is 0.25 ~ 0.5D.
9. parallel dual-screw extruding machine screw rod according to claim 8, is characterized in that: the total length of described turbine mixing element is 4D, and the length of narrow pitch screwing element (5) is 1D.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420576592.7U CN204222134U (en) | 2014-10-08 | 2014-10-08 | Parallel dual-screw extruding machine screw rod |
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| CN201420576592.7U CN204222134U (en) | 2014-10-08 | 2014-10-08 | Parallel dual-screw extruding machine screw rod |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106750864A (en) * | 2016-12-19 | 2017-05-31 | 宁波泰甬汽车零部件有限公司 | A kind of adjustable dynamic vulcanization thermoplastic elastomer of melt state and preparation method thereof |
| CN107139425A (en) * | 2017-07-11 | 2017-09-08 | 广东轻工职业技术学院 | Strongly tensile differential multi-screw extruder in the same direction and its processing method |
| CN108790104A (en) * | 2018-06-26 | 2018-11-13 | 武汉亿美特模塑技术有限公司 | Forward and reverse spiral combines pulsation plasticizing screw rod |
| CN109228000A (en) * | 2018-09-07 | 2019-01-18 | 南京波平电子科技有限公司 | Dedicated absorbing material of vehicle radar antenna and preparation method thereof |
| CN109333911A (en) * | 2018-11-21 | 2019-02-15 | 青岛科技大学 | A kind of gear pump type rubber continuous injecting apparatus |
-
2014
- 2014-10-08 CN CN201420576592.7U patent/CN204222134U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106750864A (en) * | 2016-12-19 | 2017-05-31 | 宁波泰甬汽车零部件有限公司 | A kind of adjustable dynamic vulcanization thermoplastic elastomer of melt state and preparation method thereof |
| CN107139425A (en) * | 2017-07-11 | 2017-09-08 | 广东轻工职业技术学院 | Strongly tensile differential multi-screw extruder in the same direction and its processing method |
| CN108790104A (en) * | 2018-06-26 | 2018-11-13 | 武汉亿美特模塑技术有限公司 | Forward and reverse spiral combines pulsation plasticizing screw rod |
| CN109228000A (en) * | 2018-09-07 | 2019-01-18 | 南京波平电子科技有限公司 | Dedicated absorbing material of vehicle radar antenna and preparation method thereof |
| CN109333911A (en) * | 2018-11-21 | 2019-02-15 | 青岛科技大学 | A kind of gear pump type rubber continuous injecting apparatus |
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