CN101875232A - Conical three-screw rod extruder arranged like triangle - Google Patents

Conical three-screw rod extruder arranged like triangle Download PDF

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Publication number
CN101875232A
CN101875232A CN2009102504929A CN200910250492A CN101875232A CN 101875232 A CN101875232 A CN 101875232A CN 2009102504929 A CN2009102504929 A CN 2009102504929A CN 200910250492 A CN200910250492 A CN 200910250492A CN 101875232 A CN101875232 A CN 101875232A
Authority
CN
China
Prior art keywords
screw
screw rods
conical
screw rod
extruder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2009102504929A
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Chinese (zh)
Inventor
王克俭
郭冰
吴大鸣
陈卫红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing University of Chemical Technology
Original Assignee
Beijing University of Chemical Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing University of Chemical Technology filed Critical Beijing University of Chemical Technology
Priority to CN2009102504929A priority Critical patent/CN101875232A/en
Publication of CN101875232A publication Critical patent/CN101875232A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/405Intermeshing co-rotating screws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/41Intermeshing counter-rotating screws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/425Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders using three or more screws
    • B29C48/43Ring extruders

Abstract

The invention relates to a conical three-screw rod extruder which is arranged like a triangle and consists of a die (1), a barrel (2), three conical screw rods (3), a feed hopper (4), a reduction gearbox (5) and a motor (6). The motor transfers the rotation motion onto the three screw rods via the reduction gearbox. The three screw rods (7, 9 and 11) are the conical screw rods, and the central lines thereof are arranged line the triangle (figure 2). The three screw rods are active and form three kneading areas (8, 10 and 12). The conical three-screw rod extruder integrates the advantages of a parallel three-screw rod extruder arranged like the triangle and a conical twin-screw rod extruder, is used as a processing and mixing device of plastic, rubber, propellant and other polymers and other materials, and can improve the transportation, the mixing and the plastic refining capabilities.

Description

The conical three-screw rod extruder of rounded projections arranged
Technical field
The present invention relates to a kind of in-line and arrange conical three-screw rod extruder, can be used in the processing such as plastics, rubber, synthetic fibers, coating, paper pulp, pharmacy, feed, food, explosive, propellant mixing, extrude, technical process such as moulding, reaction.This machine both can be used for experiment also can be directly used in production.
Background technology
The process principle of extruder is: material is infeeded one have the screw device of heating, stirring and advance and carry, its screw rod is when precession, remove material is screwed in the thread groove continuously, doing outside continuous being fed forward, mainly is the inboard that material is screw channel, because of be subjected to temperature gradually heat melt, and in screw channel through stirring uniformly and stirring, and finish mixing after, supply with and through being positioned at the terminal mould place of defeated material, according to mould fixed shape be extruded into the strip finished product.And in the differentiation of the main version of existing extruder, mainly be that single screw rod, twin-screw and multiscrew three major types are arranged.
Single screw extrusion machine banburying function is very weak, mainly leans on material and screw rod and machine barrel friction, extruding and high-temperature heating and screw extrusion to plastify, general rotating speed and temperature height, and power consumption is higher; Can produce quite high back pressure, so the quality of discharging is wayward, the reduction that output is relative.
Development along with the Polymer Processing industry, moulding and hybrid technique have been proposed more and more higher requirement, single screw extrusion machine since the inherent shortcoming of this body structure (flow field that causes simple in structure is simple, thereby mix scarce capacity) can not satisfy these technological requirements, mainly show: loading is little when (A) filling-modified, is difficult to good mixing; (B) glass strengthens in the modification, and glass adds difficulty, and mixed effect is poor; (C) bad etc. to material processabilities such as PVC-U powders.Double screw extruder then can satisfy the technological requirement of above several respects preferably.In the double screw extruder, it is opposed that the protruding row thread of two screw rods is interlaced row, and in opposed formation " C type " chamber, material is subjected to shearing, friction and heating, rub and strengthen the mixing plasticizing effect; Material forward conveying capacity is big, the output height; Generally need not too high heating, can economize the energy, the discharging speed height; Two screw rods are meshing with each other, and are self-cleaning effective, reduced the decomposition carbonization phenomenon of material, thereby obtain general application.
Double screw extruder has the branch of parallel double-screw extruder and conical double screw extruder.Compare the former, the interior cone angle in the outside cone angle of the latter's screw rod external diameter and screw channel root footpath varies in size; The large and small end diameter ratio of screw rod is greater than 1; Spiral groove depth is along the gradual change of screw rod total length.Compare with parallel counter-rotating intermeshing double screw extruder, it is good that the design feature of conical double-screw has determined that it not only has the forced conveyance of the screw channel chamber of sealing, material, residence time of material narrowly distributing, self-cleaning, the advantage that also has following uniqueness: the screw rod tail diameter increases, feeding quantity increases, and extrudes output to improve extruder.The screw rod tail diameter increases the bearing capacity that has also increased screw rod, and gear and bearing long service life help arranging thrust bearing and gear; Feeding section screw channel volume is big, easily adds the bulk density powder of larger volume, also helps the heat conduction, and easier realization is to material heating or cooling; The discharge zone screw diameter is little, and peripheral speed is less, and the shearing of generation is lower, and frictional heat is also less, fire damage dangerous little; The screw channel volume reduces gradually along extruding direction, and material obtains compression gradually, thereby makes screw channel be full of material sooner, guarantees material plasticizing gently continuously; Under same production capacity, back pressure can be lower.
The tradition conical double-screw is incorgruous, and patent 200510118915.3 has been invented the conical double screw extruder of equidirectional rotation.Processed material becomes the extruding of 8 fonts around the biconial screw rod in machine barrel, increased fusion time and banburying performance, thereby guaranteed the plasticizing quality of product.Make the existing good power of extruding of this invention that good soffening be arranged again, extruding and granulation in the applicable plastic processing improved output, cuts down the consumption of energy, and is a kind of novel extruder of suitable various materials processing.But two screw rods still can only form one and mediate the district.Along with polyblend and composite modified develop rapidly, more and more higher to the requirement of refinement, the dispersion mixing of each component in the processing, correspondingly require to have better plasticating equipment, the target of high-quality to realize, efficient, low energy consumption.
Patent CN01207223.0 develops the parallel three-screw extruder of rounded projections arranged on the basis of parallel double-screw extruder, three screw rods are arranged in parallel, and forms three and mediates district and a center.Relative two screw rods extruder, three-screw extruder has the positive conveyance characteristic of fricting shearing and a plurality of region of engagements, and material and screw rod have bigger contact area.Mixing fully, heat transmitting is good, melt capacity is big, exhaust capacity is good and temperature control is better, and have lower energy consumption.
If three screw rods are taper, then develop into conical three-screw rod extruder, the rotation of three screw rods can be carried out in the same way and incorgruous combination.Like this, can gather a plurality of advantages of parallel three-screw extruder and taper extruder, thereby further improve crudy and efficient, cut down the consumption of energy, and expansion forms new process applications.This is the design of this patent just.
Summary of the invention
The present invention has concentrated the advantage of conical double screw extruder with the parallel three-screw extruder of rounded projections arranged.
Among the present invention, three screw rods (7,9,11 3 screw rods among Fig. 1) are triangularly arranged, and the center of three screw rods is being positioned at (Fig. 1 intermediate cam shape) on leg-of-mutton three summits on the same section; Three screw rods all are conical screw, and centre-to-centre spacing becomes big by small end gradually to big end as seen from Figure 2; The dash area of Fig. 1 is represented the region of engagement, and three screw rods mesh in twos and formed three region of engagements (8,10 among Fig. 1,12), are equivalent to the effect of three pairs of twin-screws.
Being multiplied of region of engagement makes material plasticating in screw rod, homogenizing, and the number of times of shearing is multiplied, and has improved plasticating of equipment effectively, fusion, dispersive property has improved the quality of plasticating, and has shortened process time, meets the requirement of energy-saving and emission-reduction.The centre-to-centre spacing of three axis becomes big by small end gradually to big end, make uni-drive gear box three output shafts that bigger centre-to-centre spacing be arranged, this is that gear and gear shaft in the transmission system and journal bearing and the thrust bearing that supports these gear shafts leave bigger installing space, and the parallel three-screw extruder of this rounded projections arranged is incomparable.And the feeding section diameter is big, and the screw channel volume is big, easily adds the bulk density powder of larger volume; The screw channel volume reduces gradually along extruding direction, and material obtains compression gradually, thereby makes screw channel be full of material sooner, guarantees material plasticizing gently continuously; The discharge zone screw diameter is little, and under same pressure and frictional resistance, the moment of torsion that screw rod bears is little; Under same production capacity, back pressure is lower.
Specific embodiments
Under motor 6 drove, through the deceleration and the transmission distribution of reduction box 5, three screw rods 7,9,11 independently rotatablely moved respectively.Three screw rods (7,9,11) be conical screw, and center line is rounded projections arranged (Fig. 1), the centre-to-centre spacing of three axis becomes big by small end gradually to big end, make uni-drive gear box three output shafts that bigger centre-to-centre spacing be arranged, this is that gear and gear shaft in the transmission system and journal bearing and the thrust bearing that supports these gear shafts leave bigger installing space.Three screw rods constitute three and mediate district (8,10,12).Being multiplied of region of engagement makes material plasticating in screw rod, homogenizing, and the number of times of shearing is multiplied, and has improved plasticating of equipment effectively, fusion, dispersive property has improved the quality of plasticating, and has shortened process time, meets the requirement of energy-saving and emission-reduction.Add materials by charge door 4, under the heat effect of temperature control system on the shearing of screw rod and the machine barrel 2, extrude by head.
Description of drawings
Fig. 1 is the kneading schematic diagram of rounded projections arranged conical screw extruder screw rod
Fig. 2 is the general structure schematic diagram of rounded projections arranged conical screw extruder
Fig. 3-6 is four kinds of direction of rotation combinations of three screw rods schematic diagram of extruder
Fig. 7-9 is three kinds of placement combination schematic diagrames of screw rod in the extruder
Figure 10 is a kind of screw combinations schematic three dimensional views of extruder

Claims (4)

1. the conical three-screw rod extruder of rounded projections arranged comprises a mouthful mould, machine barrel, three conical screws, loading hopper, reduction box, motor.It is characterized in that: three screw rods are conical screw, the center line rounded projections arranged, and three screw rods have formed three and have mediated the district, and three screw rods independently rotate.
2. require described three screw rods to be conical screw as right 1, the center line rounded projections arranged is characterized in that: on same section, and being centered close on leg-of-mutton three summits of three screw rods, according to leg-of-mutton different the placement, 3 kinds of screw rod modes of emplacements can be arranged.
3. requiring described three screw rods to form three as right 1 mediates the district, it is characterized in that: per two adjacent screw rods form one and mediate the district, mediate the district for totally three.
4. require described three screw rods all independently to rotatablely move as right 1, it is characterized in that: three screw rods independently rotatablely move under the drive of reduction gearbox output shaft, and the direction of rotation of screw rod is carried out making up with incorgruous direction in the same way, and 4 kinds of directions combinations can be arranged.
CN2009102504929A 2009-12-10 2009-12-10 Conical three-screw rod extruder arranged like triangle Pending CN101875232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009102504929A CN101875232A (en) 2009-12-10 2009-12-10 Conical three-screw rod extruder arranged like triangle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009102504929A CN101875232A (en) 2009-12-10 2009-12-10 Conical three-screw rod extruder arranged like triangle

Publications (1)

Publication Number Publication Date
CN101875232A true CN101875232A (en) 2010-11-03

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Country Status (1)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102228818A (en) * 2011-06-10 2011-11-02 北京化工大学 Continuous mixing unit with three tapered rotors in triangular arrangement
CN102248655A (en) * 2011-06-10 2011-11-23 北京化工大学 Tapered planetary screw extruder
CN102275285A (en) * 2011-04-15 2011-12-14 北京化工大学 Differential conical three-screw extruder with screws arranged triangularly
CN102853060A (en) * 2012-09-07 2013-01-02 石家庄德倍隆科技有限公司 Power distribution mechanism of conical three-screw extruder
CN103698227A (en) * 2013-11-28 2014-04-02 西安近代化学研究所 Device for measuring process temperature of screw rod and material in screw extrusion molding process of screw extrusion propellant
CN113276307A (en) * 2021-06-11 2021-08-20 深圳兴旺环保代塑材料开发有限公司 Three-screw extruder device for producing special material for low-pressure film blowing machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102275285A (en) * 2011-04-15 2011-12-14 北京化工大学 Differential conical three-screw extruder with screws arranged triangularly
CN102228818A (en) * 2011-06-10 2011-11-02 北京化工大学 Continuous mixing unit with three tapered rotors in triangular arrangement
CN102248655A (en) * 2011-06-10 2011-11-23 北京化工大学 Tapered planetary screw extruder
CN102853060A (en) * 2012-09-07 2013-01-02 石家庄德倍隆科技有限公司 Power distribution mechanism of conical three-screw extruder
CN103698227A (en) * 2013-11-28 2014-04-02 西安近代化学研究所 Device for measuring process temperature of screw rod and material in screw extrusion molding process of screw extrusion propellant
CN103698227B (en) * 2013-11-28 2015-12-30 西安近代化学研究所 Screw rod and material technological temperature measurement mechanism in the molded process of spiral shell pressure propellant spiral shell
CN113276307A (en) * 2021-06-11 2021-08-20 深圳兴旺环保代塑材料开发有限公司 Three-screw extruder device for producing special material for low-pressure film blowing machine

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Application publication date: 20101103