CN202071310U - Differential three-conical screw extruder with three screws triangularly arranged - Google Patents

Differential three-conical screw extruder with three screws triangularly arranged Download PDF

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Publication number
CN202071310U
CN202071310U CN2011201115324U CN201120111532U CN202071310U CN 202071310 U CN202071310 U CN 202071310U CN 2011201115324 U CN2011201115324 U CN 2011201115324U CN 201120111532 U CN201120111532 U CN 201120111532U CN 202071310 U CN202071310 U CN 202071310U
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CN
China
Prior art keywords
screws
screw
section
screw rod
differential
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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.)
Expired - Fee Related
Application number
CN2011201115324U
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Chinese (zh)
Inventor
王克俭
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Beijing University of Chemical Technology
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Beijing University of Chemical Technology
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Application filed by Beijing University of Chemical Technology filed Critical Beijing University of Chemical Technology
Priority to CN2011201115324U priority Critical patent/CN202071310U/en
Application granted granted Critical
Publication of CN202071310U publication Critical patent/CN202071310U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • 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
    • B29C48/585—Screws provided with gears interacting with the flow
    • 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
    • B29C48/395—Means 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
    • B29C48/40—Means 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
    • B29C48/405—Intermeshing co-rotating screws
    • 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
    • B29C48/395—Means 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
    • B29C48/40—Means 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
    • B29C48/41—Intermeshing counter-rotating screws
    • 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
    • B29C48/395—Means 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
    • B29C48/40—Means 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
    • B29C48/42—Non-identical or non-mirrored screws

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The utility model relates to a differential three-conical screw extruder with screws triangularly arranged, which mainly comprises a charging device, a machine barrel, the three screws, a machine head, a heating and cooling device, an exhaust port, a motor and a transmission device, wherein the three screws are conical screws and are triangularly arranged; two of the three screws are male rotors, and one screw is a female rotor; the three screws are combined to form three engagement zones which are provided with at least one thread section; the number of the heads of the screw flights of the female rotor on the thread section is integral multiple of that of the male rotors; the rotational speed ratio of the female rotor to the male rotors and the ratio of the number of the heads of the screw flights are in inverse ratio, thus, differential rotation can be realized, and the three screws are not interfered when in motion. The three screws can be arranged in an inverted Chinese character 'pin' shape, a positive Chinese character 'pin' shape or an oblique Chinese character 'pin' shape. Different zones of the charging section, the fusion section, the exhaust section and the metering section of each screw can be provided with thread sections with different leads and cross section molded lines; when the three screws are arranged, except the three screws are ensured to be provided with at least one thread engagement section in the differential rotation, the three screws can be engaged and can also be not engaged in different zones so as to achieve an effect of enhancing mixing and exhaust. The extruder has high mixing, plasticizing and conveying capacity and is suitable for machine shaping of various materials, such as plastics, rubber, food, explosives and the like.

Description

The differential conical three-screw rod extruder of screw rod rounded projections arranged
Technical field
The present invention relates to the differential conical three-screw rod extruder of screw rod rounded projections arranged, processing is extruded in the conveying, plasticizing, mixing, granulation, extrusion molding and the reaction that are fit to material, can be used for industries such as oil, chemical industry, rubber, plastics, food, pharmacy, explosive and propellant.
Background technology
In industry such as oil, chemical industry, rubber, plastics, pharmacy, food, explosive and propellant, often relate to the high viscosity fluid mix, mixing effects such as shearing and plasticizing, screwe-type xtruder is an important equipment of realizing these effects.
Screw extruder has the branch of common double screw extruder and conical 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.Advantage with following uniqueness: the screw rod tail diameter increases, and 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.
The tradition conical double-screw is incorgruous, and patent 200510118915.3 has been invented the conical double screw extruder of equidirectional rotation.Processed material around the extruding of biconial screw rod, has increased fusion time and banburying performance, thereby has guaranteed the plasticizing quality of product in machine barrel.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.
A kind of differential twin-screw kneader is provided among the patent CN201079735Y, had both had traditional kneader device to mixing, the shearing of high viscosity fluid and plastify mixing effect, had the characteristics that screw extruder is extruded continuously again.But the screw rod in this patent helicitic texture vertically is identical, can not adapt to the needed different helicitic textures of material different processing stages; And this patent is a kind of continuous kneader, can not well be applicable to the extrusion molding, granulation, mixing etc. of material.
If differential twin-screw kneader is carried out architecture advances, and increase a screw rod, form three region of engagements; Screw rod is designed to taper, and then also there is squeezing action from the taper barrel in material in transport process.Like this, form the differential conical three-screw rod extruder of screw rod rounded projections arranged, gathered a plurality of advantages of three-screw extruder, conical screw extruder and differential kneader, further improved 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 differential conical three-screw rod extruder of screw rod rounded projections arranged of the present invention, mainly form by feeding device, machine barrel, screw rod, head, heating-cooling device, exhaust outlet, motor, transmission device, but three conical screws of differential rotation are arranged in the machine barrel, be triangularly arranged.In the course of the work, three screw rods are meshing with each other, and form three region of engagements.
Screw rod is divided into female rotor and male rotor, and spiral shell rib head number is many is called female rotor, and spiral shell rib head number is few is called male rotor.Two is male rotor in three screw rods, and one is female rotor; Three screw combinations form three region of engagements, have a thread segment at least, are the integral multiple of male rotor at the female rotor spiral shell rib head number of this section, and the rotary speed of negative and positive rotor and spiral shell rib head number are inverse ratio, can realize that differential rotates.At the thread segment of differential rotation, rotor section molded lines is connected in sequence by the plurality of sections curve, and negative and positive rotor end-face molded lines is corresponding mutually, and the conjugation engagement forms good engagement during differential motion, guarantee not interfere.
In the screw-threaded engagement district of differential rotation, adjacent male helical rotors pair can be conjugation in theory, and positive conveyance ability and upbuild voltage capacity are very strong.In the region of engagement, because of the very big speed difference of the different formation of screw speed, possess like this and shear and multiple effect such as stretching between the screw channel of the spiral shell rib of female rotor and screw channel and corresponding male rotor and the spiral shell rib, therefore obviously strengthen and mix and plasticizing effect.And the negative and positive rotor is meshing with each other in the process, peels off the material that is attached on the screw rod mutually, has the automatically cleaning ability.
Three screw rods can be two last one under the arrangement of falling the isosceles triangle, also can be one last two under positive isosceles triangle, can also be inclination isosceles triangle modes of emplacement, wherein a female rotor can be placed on leg-of-mutton diverse location.
In order better to adapt to the processing request of material, on the different sections of feeding section, melt zone, exhaust section and the metering section of screw rod, can be set to different lead and end face molded lines even change the thread segment of screw rod spiral shell rib head number.Guarantee when three screw rods are installed to have at least outside the screw-threaded engagement district of a differential rotation, different sections can be engagement also can be out of mesh so that realize strengthening mixing, exhaust effect.For example, for the mixing ability of further enhancing equipment and realize stable extruding, can increase screw pin section or toothed disc etc., but not interfere must guarantee the negative and positive rotor motion time at certain section; On extruder exhaust section machine barrel exhaust outlet is set, the exhaust outlet device of air that runs in is realized the devolatilization of moisture and other gases, improves quality of item.
Description of drawings
Fig. 1 is the structural representation of the differential conical three-screw rod extruder of screw rod rounded projections arranged
The 1-head, 2-heating-cooling device, 3-exhaust outlet, 4-machine barrel, 5-screw rod, 6-feeding device, 7-mount pad, 8-shaft coupling, 9-reduction box, 10-motor, 11-frame.
Fig. 2 is the mesh schematic representation of three differential conical screws
Fig. 3 is a kind of male rotor structural representation
Fig. 4 is a kind of female rotor structural representation
Fig. 5 be two male rotors a last female rotor under the arrangement of falling isosceles triangle mesh schematic representation
Fig. 6 is the arrangement mesh schematic representations of two male rotors at a female rotor opposite side of a side
Fig. 7 is that two male rotors are arranged mesh schematic representation at next female rotor at last isosceles triangle
Screw rod sectional drawing when Fig. 8 adopts screw pin for the screw mixing section with pin installing hole
Side view when Fig. 9 adopts the mesh plate element for the screw mixing section
Front view when Figure 10 adopts the mesh plate element for the screw mixing section
The specific embodiment
Case study on implementation one
Design the differential conical three-screw rod extruder of screw rod rounded projections arranged according to Fig. 1, three screw engages such as Fig. 2, wherein male rotor structure such as Fig. 2, female rotor structure such as Fig. 3.Three screw rods 5 adopt spread patterns such as Fig. 5, Fig. 6 or Fig. 7 in the extruder.Wherein, in the screw-threaded engagement district, male rotor spiral shell rib head number is 1, and female rotor spiral shell rib head number is 4.Pot motor 10 by reduction box 9, shaft coupling 8 with torque distribution to negative and positive change in, the ratio of its speed is that 1/4, two male rotor rotates in the same way, and female rotor and male rotor are incorgruous rotation.Screw rod 5 assemblings are placed in the barrel 4 that is fixed in mount pad 7, have exhaust outlet 3 on the barrel 4, regulate temperature by outer dress heating-cooling device 2, and barrel 4, reduction box 9 and motor 10 are directly installed on the frame 11.
Add material to be processed from charge door 6, material becomes molten condition by pellet or powder after Solid Conveying and Melting, compression fusion.During through exhaust outlet 3, moisture and volatilization gas in the material are discharged machine barrel via exhaust apparatus.Near head 1 mixing section is set on the screw rod, adopts the screw form with holes of settling pin among Fig. 8.Pin plays and cuts apart materials flow on the screw rod, increases the interface, changes the materials flow direction, makes the interface reorientation, the effect that materials flow is rearranged.By repeatedly shunting, converge, reorientation and realize distributing and mix has remedied the incorgruous rotation of rotor and has distributed and mix indifferent shortcoming.Material is extruded by head 1 through behind the mixing section.
Case study on implementation two
Be similar to case study on implementation one and form the differential conical three-screw rod extruder.Difference is in the mixing section of screw rod at close head 1, adopts side view 9 and faces mesh plate form shown in Figure 10.Tooth shape of screw dish noninterlace district can shunt material, increases the interface, and minimum energy input is provided, and helps distributing and mixes, and produces lower temperature; , also help distributing and mix the shearing of material formation at ecotone perpendicular to flow direction.

Claims (3)

1. the differential conical three-screw rod extruder of screw rod rounded projections arranged, mainly be made up of feeding device, machine barrel, screw rod, head, heating-cooling device, exhaust outlet, motor, transmission device, it is characterized in that: three screw rods are taper, are triangularly arranged, two male rotors, a female rotor; Three screw combinations form three region of engagements, have a thread segment at least, are the integral multiple of male rotor at the female rotor spiral shell rib head number of this section, and the rotary speed of negative and positive rotor is inverse ratio than with spiral shell rib specific lobe, can realize that differential rotates, and does not interfere during motion.
2. the differential conical three-screw rod extruder of screw rod rounded projections arranged according to claim 1, it is characterized in that: three screw rods can be two last one under the arrangement of falling the isosceles triangle, also can be one last two under positive isosceles triangle, can also be inclination isosceles triangle modes of emplacement, wherein a female rotor can be placed on leg-of-mutton diverse location.
3. the differential conical three-screw rod extruder of screw rod rounded projections arranged according to claim 1, it is characterized in that: the thread segment that on the different sections of feeding section, melt zone, exhaust section and the metering section of screw rod, can be set to different lead and section molded lines, three screw rods guarantee to have at least outside the screw-threaded engagement district of a differential rotation when installing, different sections can be engagement also can be out of mesh so that realize to strengthen mixing, exhaust effect.
CN2011201115324U 2011-04-15 2011-04-15 Differential three-conical screw extruder with three screws triangularly arranged Expired - Fee Related CN202071310U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201115324U CN202071310U (en) 2011-04-15 2011-04-15 Differential three-conical screw extruder with three screws triangularly arranged

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201115324U CN202071310U (en) 2011-04-15 2011-04-15 Differential three-conical screw extruder with three screws triangularly arranged

Publications (1)

Publication Number Publication Date
CN202071310U true CN202071310U (en) 2011-12-14

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Cited By (2)

* 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
CN109159314A (en) * 2018-10-19 2019-01-08 青岛科技大学 A kind of triple-spool mixer

Cited By (2)

* 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
CN109159314A (en) * 2018-10-19 2019-01-08 青岛科技大学 A kind of triple-spool mixer

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111214

Termination date: 20130415