CN1651220A - Material along path feed back dynamic mixing extrusion method and equipment - Google Patents

Material along path feed back dynamic mixing extrusion method and equipment Download PDF

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Publication number
CN1651220A
CN1651220A CNA2005100334357A CN200510033435A CN1651220A CN 1651220 A CN1651220 A CN 1651220A CN A2005100334357 A CNA2005100334357 A CN A2005100334357A CN 200510033435 A CN200510033435 A CN 200510033435A CN 1651220 A CN1651220 A CN 1651220A
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CN
China
Prior art keywords
screw
extruder
screw rod
feedback
parallel
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Application number
CNA2005100334357A
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CN100450746C (en
Inventor
瞿金平
晋刚
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South China University of Technology SCUT
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South China University of Technology SCUT
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Priority to CNB2005100334357A priority Critical patent/CN100450746C/en
Publication of CN1651220A publication Critical patent/CN1651220A/en
Application granted granted Critical
Publication of CN100450746C publication Critical patent/CN100450746C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

A feedback-type dynamic pugging-extruding method features that when the material is delivered, mixed and pugged in extruding out direction, part of material is fed back into main material flow for controlling and regulating the moving-pugging procedure. Its apparatus is composed of a primary screw-bolt extruder and a secondary one for feeding back.

Description

Material along path feed back dynamic mixing extrusion method and equipment
Technical field
The present invention relates to polymer and composite manufacture field thereof, concrete is a kind of polymer and composite thereof feed back dynamic mixed milling extrusion method and equipment along journey.
Background technology
Single screw extrusion machine has obtained using widely at aspects such as the blend of polymer, filling, devolatilization, painted and chemical reactions as the most basic Polymer Processing equipment.But from the angle of mixed milling, the problem that single screw extrusion machine exists is: a little less than the shear strength, and mixing scarce capacity, the time of staying is short, yields poorly.The meshed double screw extruder is compared with single screw extrusion machine as another kind mixed milling equipment mainly in the same way, has the shear strength height, distributes and disperses mixing energy effective, series of advantages such as residence time of material narrowly distributing, production capacity height.The subject matter that parallel dual-screw extruding machine exists is to process temperature-sensitive material, can not set up and satisfy the head pressure that goods are extruded, and feed properties is not good, adjusting screw(rod) combination inconvenience etc.Counter rotation twin screw extruder also just progressively is used for mixed milling except the mixing that is used for temperature-sensitive material disperses, advantage is that the feed properties of more preceding two kinds of extruders is good, and the time of staying distributes narrower, and conveying capacity is strong.But because of its screw speed can not improve, make shear strength not enough, the material that is fit to mixed milling is few.Three-screw extruder has strengthened the kneading effect to material by increasing the region of engagement, makes the mixed milling ability further improve.No matter current is double screw extruder or three-screw extruder, all strengthens the mixed milling effect by increasing the screw engages district technically.But because after meeting the screw speed setting of productivity ratio requirement, the mixing of materials mixing time is also definite thereupon, can't be adjusted, still have partial material can not in the regular hour, obtain sufficient mixed milling.Increase screw slenderness ratio and no doubt can extend the material lagging time, strengthen material mixed milling effect, but excessive draw ratio makes barrel and screw rod processing that difficulty is installed, cost increases, thereby draw ratio also can only be increased to certain limit.So the excursion of the mixing of materials mixing time in traditional screw extruder is limited, and regulate very difficult.
Summary of the invention
The objective of the invention is in process, to regulate and to control the time of staying of material in barrel and the deficiency of mixed milling time at any time in order to overcome existing screw extruder, assurance equipment can provide sufficient shearing and kneading effect for the material that is difficult to mixed milling, raising equipment is to the adaptability of different material system, what a kind of polymer and composite thereof were provided feeds back dynamic mixed milling extrusion method along journey, material is being carried towards extruding direction, mix, when mixing, there is the contrary direction of extruding of partial material to turn back to major ingredient stream along Cheng Lianxu, form material and flow, make the mixed milling process of material along extruding direction continuous distributed feedback, controlled and adjusting of the time of staying.
The present invention also aims to provide the equipment of described method use.
The inventive method is: material forms material and flows along extruding direction continuous distributed feedback towards extruding direction conveying, mixing, when mixing, having the contrary direction of extruding of partial material to turn back to major ingredient stream along Cheng Lianxu.
The equipment of realizing the described method of claim 1 is extruded direction by a driving screw extruder and one and is extruded the opposite feedback screw extruder of direction with main extruder and constitute, the screw axis of two extruders is parallel and arrange up and down, being the screw rod in the main extruder above, is the screw rod in the feedback extruder below.Press the screw axis direction between the two extruders barrel along Cheng Guantong.
Twin-screw that main extruder or the screw rod of feedback in the extruder be single screw rod, be arranged in parallel or axis are at grade and three screw rods that are arranged in parallel; Screw rod quantity ratio in main extruder and the feedback extruder is 1: 1,2: 1,3: 1,2: 2,3: 2,3: 3.
Single screw extrusion machine is during as main extruder, and its screw rod can axial vibration, and the three-screw extruder that is arranged in parallel is during as main extruder, and middle screw rod can axial vibration.Single screw extrusion machine is as feedback during extruder, and its screw rod can axial vibration, and the three-screw extruder that is arranged in parallel is during as the feedback extruder, and middle screw rod can axial vibration.
Screw rod in main extruder and the feedback extruder can adopt assembled screw rod, it can be that single screw rod, twin-screw or axis are at conplane three screw rods that the screw rod of main extruder is arranged, when the screw rod number greater than for the moment, can engagement between the screw rod, also can make out of mesh, can be in the same way between the screw rod rotation direction, also can be reverse.
The screw rod of feedback extruder is arranged the same form in employing and the main extruder.The screw rod of main extruder does not mesh with the feedback extruder screw, and the screw diameter of two extruders can be inequality.
Press the screw axis direction between the two extruders barrel along Cheng Guantong, material can exchange between two extruders.Main extruder and feedback extruder drive respectively, and regulate rotating speed separately respectively.When the screw rod number of main extruder was 1 or 3, the middle screw rod afterbody installation shaft in single screw rod tail or three screw rods made single screw rod or middle screw rod axial vibration to exciting device.And can control and adjust the frequency and the amplitude of screw vibration respectively.This excitation method and structure equally also are applied to feed back extruder.
During work, material joins in the driving screw screw channel via hopper, by the driving screw fusion plastification and be fed forward.Owing to communicate between the barrel of two extruders, partial material enters in the screw channel of bottom feedback screw rod, and oppositely is delivered to the upstream of main extruder, and experience once plastifies mixing once more.Because the rotating speed of driving screw and feedback screw rod can be regulated respectively, so just make the conveying capacity of main extruder and the feedback conveying capacity of feedback extruder to control, and then reach adjusting and control the time of staying of material in barrel and the purpose of extrusion capacity size, the time of staying that is difficult to the material abundance of mixed milling, guarantee the abundant mixed milling of each component in the material.Simultaneously, the axial vibration of screw rod imports whole Solid Conveying and Melting with a frequency and the adjustable vibration field of force of amplitude, in fusion and the mixed milling process, makes material be among the dynamic mixed milling, has strengthened the mixed milling effect greatly, improves quality of item.
The present invention compared with prior art has following advantage:
1, owing to feeding back to the upstream by the feedback extruder, extrudes once more the material that main extruder can be carried, thus time of staying lengthening, can strengthen material mixed milling effect greatly, improve the blending and modifying quality of item;
2, owing to can regulate the extrusion capacity of two extruders in process of production at any time respectively, thus can the flexible modulation residence time of material, satisfy of the requirement of different cultivars material to the mixed milling time;
3, the number of driving screw and feedback screw rod, arrangement mode, engagement rotation mode have multiple combined optional to select, and the wide application range of material of processing can be selected according to actual needs.
Description of drawings
Fig. 1 is the structural representation of present device.
Fig. 2 is that Fig. 1 driving screw and feedback screw rod group quantity ratio are 1: 1 o'clock screw rod layout drawing.
Fig. 3 is that Fig. 1 driving screw and feedback screw rod group quantity ratio are 2: 1 o'clock screw rod layout drawing.
Fig. 4 is that Fig. 1 driving screw and feedback screw rod group quantity ratio are 3: 1 o'clock screw rod layout drawing.
Fig. 5 is that Fig. 1 driving screw and feedback screw rod group quantity ratio are 2: 2 o'clock screw rod layout drawing.
Fig. 6 is that Fig. 1 driving screw and feedback screw rod group quantity ratio are 3: 2 o'clock screw rod layout drawing.
Fig. 7 is that Fig. 1 driving screw and feedback screw rod group quantity ratio are 3: 3 o'clock screw rod layout drawing.
The specific embodiment
Fig. 1 is the equipment schematic diagram that the method for the invention is used.This equipment is made of main extruder motor 1, shaft coupling 2, deceleration distributor box 3, barrel 4, feed arrangement 5, feedback screw rod 6 driving screws 7, feedback extruder motor 8, head 9, vibration jockey 10, shaft coupling 11, reductor 12 and exciting device 13.Wherein main extruder motor 1, shaft coupling 2, deceleration distributor box 3 and driving screw 7 are formed main extruder.Feedback screw rod 6, feedback extruder motor 8, vibration jockey 10, shaft coupling 11, reductor 12 and exciting device 13 are formed the feedback extruder.The shared barrel 4 of two extruders.The structure and the course of work of equipment are: feed arrangement 5 feeds material the feed end of main extruder.Main extruder motor 1 is given gear graduation distributor box 3 by shaft coupling 2 with transmission of power, the gear graduation distributor box passes to the driving screw 7 that places barrel 4 internal upper parts after power speed changing is distributed, the driving screw number is greater than for the moment, driving screw can be in the same way or incorgruous rotation, and material is carried to head 9 directions.An other end, feedback extruder motor 8 is given reductor 12 by shaft coupling 11 with transmission of power, passes to the feedback screw rod 6 that places bottom in the barrel 4 after slowing down, and makes its rotation.When feeding back screw rod 6 numbers greater than for the moment, then feeding back screw rod 6 can be in the same way or incorgruous rotation, the feedback screw rod promotes material and carries towards the feed end direction of main extruder, forms to carry the feedback of the material of coming to carry to driving screw, makes partial material be back to the driving screw upstream.Regulate the rotating speed of main extruder motor 1 and feedback extruder motor 8 and just can regulate the rotating speed of driving screw 7 and feedback screw rod 6 respectively, and then regulate the time of staying and the mixed milling time of material.In whole extrusion, the exciting force that vibrator 13 produces is passed to feedback screw rod 6 by vibration jockey 10, makes it do frequency and the adjustable axial vibration of amplitude, imports in the material thereby will vibrate the field of force.Vibrator 13 can adopt multiple theory structure modes such as machinery, electromagnetism, hydraulic pressure to produce exciting force.Finally, the material in the barrel 4 through behind the circulation mixed milling of several times, is extruded from head 9 under Vibration Force Field.The direction that material is extruded from head and the axis direction of screw rod meet at right angles.
Fig. 2 is 1: 1 o'clock compound mode for driving screw 7 and the number ratio that feeds back screw rod 6; Driving screw 7 is last, and feedback screw rod 6 is following, and two screw rods can be distinguished axial vibration;
Fig. 3 is 2: 1 o'clock compound mode for driving screw 7 and the number ratio that feeds back screw rod 6; Driving screw 7 is last, and feedback screw rod 6 is down, and feedback screw rod 6 can axial vibration;
Fig. 4 is 2: 2 o'clock compound mode for driving screw 7 and the number ratio that feeds back screw rod 6; Driving screw 7 is last, and feedback screw rod 6 is following;
Fig. 5 is 3: 1 o'clock compound mode for driving screw 7 and the number ratio that feeds back screw rod 6; Driving screw 7 is last, and feedback screw rod 6 is down, and the middle screw rod of driving screw 7 and feedback screw rod 6 can axial vibrations;
Fig. 6 is 3: 2 o'clock compound mode for driving screw 7 and the number ratio that feeds back screw rod 6; Driving screw 7 is last, and feedback screw rod 6 is down, and the middle screw rod of driving screw 7 can axial vibration;
Fig. 7 is 3: 3 o'clock compound mode for driving screw 7 and the number ratio that feeds back screw rod 6; Driving screw 7 is last, and feedback screw rod 6 is down, and the middle screw rod of the middle screw rod of driving screw 7 and feedback screw rod 6 can axial vibration;
The combination of screw rod, arrangement, engagement rotation mode can be selected according to material variety and processing request.

Claims (4)

1, a kind of polymer and composite thereof feeds back dynamic mixed milling extrusion method along journey, it is characterized in that: material towards extrude direction conveying, mixing, when mixing, there is the contrary direction of extruding of partial material to turn back to major ingredient stream along Cheng Lianxu, forms material and flow along extruding direction continuous distributed feedback.
2, realize the equipment of the described method of claim 1, it is characterized in that: extrude direction by a driving screw extruder and one and extrude the opposite feedback screw extruder of direction with main extruder and constitute, the screw axis of two extruders is parallel and arrange up and down, being the screw rod in the main extruder above, is the screw rod in the feedback extruder below; Press the screw axis direction between the two extruders barrel along Cheng Guantong.
3, equipment according to claim 2 is characterized in that: twin-screw that main extruder or the screw rod of feedback in the extruder be single screw rod, be arranged in parallel or axis are at grade and three screw rods that are arranged in parallel; Screw rod quantity ratio in main extruder and the feedback extruder is 1: 1,2: 1,3: 1,2: 2,3: 2,3: 3.
4, equipment according to claim 3 is characterized in that: single screw extrusion machine is during as main extruder, and its screw rod can axial vibration, and the three-screw extruder that is arranged in parallel is during as main extruder, and middle screw rod can axial vibration.Single screw extrusion machine is as feedback during extruder, and its screw rod can axial vibration, and the three-screw extruder that is arranged in parallel is during as the feedback extruder, and middle screw rod can axial vibration.
CNB2005100334357A 2005-03-11 2005-03-11 Material along path feed back dynamic mixing extrusion method and equipment Expired - Fee Related CN100450746C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2005100334357A CN100450746C (en) 2005-03-11 2005-03-11 Material along path feed back dynamic mixing extrusion method and equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2005100334357A CN100450746C (en) 2005-03-11 2005-03-11 Material along path feed back dynamic mixing extrusion method and equipment

Publications (2)

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CN1651220A true CN1651220A (en) 2005-08-10
CN100450746C CN100450746C (en) 2009-01-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106346734A (en) * 2016-08-30 2017-01-25 中国化学工业桂林工程有限公司 Extruder and extrusion process and system thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1014964B (en) * 1985-06-25 1991-12-04 东芝机械株式会社 Injection molding machines and methods for controlling same
US5836680A (en) * 1996-03-26 1998-11-17 The Goodyear Tire & Rubber Company Extruder with feedback loop control
CN1242287A (en) * 1998-07-20 2000-01-26 方祖彭 Planetary dynamic rolling supporting composite spiral-rod used for plastic extruder
JP4459467B2 (en) * 2000-10-31 2010-04-28 三菱重工プラスチックテクノロジー株式会社 Electric injection molding machine and injection speed / injection pressure control method of electric injection molding machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106346734A (en) * 2016-08-30 2017-01-25 中国化学工业桂林工程有限公司 Extruder and extrusion process and system thereof
CN106346734B (en) * 2016-08-30 2019-07-19 中国化学工业桂林工程有限公司 A kind of extruder and its extrusion process and system

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Granted publication date: 20090114

Termination date: 20130311