CN102189664A - Differential extruder with three straightly-arranged screws - Google Patents

Differential extruder with three straightly-arranged screws Download PDF

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Publication number
CN102189664A
CN102189664A CN2011100855330A CN201110085533A CN102189664A CN 102189664 A CN102189664 A CN 102189664A CN 2011100855330 A CN2011100855330 A CN 2011100855330A CN 201110085533 A CN201110085533 A CN 201110085533A CN 102189664 A CN102189664 A CN 102189664A
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CN
China
Prior art keywords
screw
screws
differential
rotor
female
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
CN2011100855330A
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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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Filing date
Publication date
Application filed by Beijing University of Chemical Technology filed Critical Beijing University of Chemical Technology
Priority to CN2011100855330A priority Critical patent/CN102189664A/en
Publication of CN102189664A publication Critical patent/CN102189664A/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
    • B29C48/50Details of extruders
    • B29C48/505Screws
    • B29C48/64Screws with two or more threads
    • B29C48/655Screws with two or more threads having three or more threads
    • 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
    • B29C48/42Non-identical or non-mirrored 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
    • B29C48/50Details of extruders
    • B29C48/505Screws
    • B29C48/585Screws provided with gears interacting with the flow
    • 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
    • B29C48/50Details of extruders
    • B29C48/505Screws
    • B29C48/64Screws with two or more threads

Abstract

The invention relates to a differential extruder with three straightly-arranged screws. The differential extruder mainly comprises a feeding device, a machine barrel, the screws, a machine head, a heating/cooling device, an exhaust port, a motor and a transmission device, wherein the three screws are straightly arranged; if a middle screw is a male rotor, screws on the two sides are female rotors, and if the middle screw is a female rotor, the screws on the two sides are male rotors; at least one thread engagement area is provided when the three screws are combined; and the screw flight quantity of the female rotors in the area is integral multiples of that of the male rotors, and the rotating speeds of the female and male rotors are inversely proportional to the screw flight quantity, so that differential rotation can be realized, and the female and male rotors do not interfere with each other during movement. According to the machining requirements of materials, threaded sections or other forms with different leads and cross section molded lines can be arranged in different sections of charging sections, melting sections, exhaust sections and metering sections of the screws; and the at least one thread engagement area in a differential rotation mode can be provided when the three screws are arranged, and the screws can be engaged with one another or can be separated from one another in the different sections, so that mixing and exhaust effects or other functions can be enhanced. The extruder has high mixing, plasticization and delivery capabilities, and is suitable for machine-shaping of various materials such as plastic, rubber, foods, explosives and the like.

Description

The differential three-screw extruder that the screw rod yi word pattern is arranged
Technical field
The differential three-screw extruder that screw rod yi word pattern of the present invention is 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, extruder and kneader are the important equipments of realizing these effects.Three-screw extruder aspect melting effect and output can be significantly better than single screw extrusion machine and double screw extruder, and solves the defective that traditional kneader takes up room greatly, efficient is low and can not work continuously, and has good development prospect.
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 counter rotation twin screw extruder is extruded continuously again.In the differential twin-screw kneader course of work, two screw rods are meshing with each other.Exist the region of engagement between two screw rods,, have speed difference between spiral shell rib and screw channel, obviously strengthened mixed effect at the place, region of engagement.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; This patent regulation male rotor number of starts is 1, and form is too single; And this patent is a kind of continuous kneader, can not well be applicable to the extrusion molding, granulation, mixing etc. of material.
Patent 200620154843.8 is developed the three-screw extruder that in-line is arranged on the basis of double screw extruder, three screw rods are arranged in parallel, and forms two and mediates the district.Relative double screw extruder, three-screw extruder has the positive conveyance characteristic of two region of engagements, and material and screw rod have bigger contact area, are equivalent to two pairs of twin-screws.Three-screw extruder mixes fully, heat transmitting is good, melt capacity is big, exhaust capacity is good and temperature control is better, and has lower energy consumption.
If differential twin-screw kneader is carried out architecture advances, and increasing a screw rod, form two region of engagements, so no matter to be from energy-conservation, or quality of item all can have better effects.
Summary of the invention
The differential three-screw extruder that screw rod yi word pattern of the present invention is arranged mainly is made up of feeding device, machine barrel, screw rod, head, heater, exhaust apparatus, motor, transmission device, but three screw rods of differential rotation are arranged in the machine barrel, is yi word pattern and arranges.In the course of the work, three screw rods are meshing with each other, and form two 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.Three screw rods form two groups of engagements in the machine barrel, and two kinds of compound modes are arranged, and one is female rotors of two male rotors, and female rotor is in the centre, and two is male rotors of two female rotors, and male rotor is in the centre.At least have a screw-threaded engagement district during three screw combinations, the female rotor spiral shell rib head number in this district is the integral multiple of male rotor, and the rotary speed of negative and positive rotor and spiral shell rib head number are inverse ratio, can realize the differential rotation.In the screw-threaded engagement district 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 this differential three-screw extruder course of work, three root screw rods are meshing with each other, and form two region of engagements.In the screw-threaded engagement district of differential rotation, adjacent male helical rotors pair can be conjugation in theory, and positive conveyance ability and pressure capability are very strong.At region of engagement place, 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 enhancing mixing 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.
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 thread segment or other forms 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 or other functions.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 three-screw extruder of screw rod yi word pattern arrangement
The 1-head, 2-machine barrel, 3-heating-cooling device, 4-exhaust outlet, 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 a female rotor of two male rotors
Fig. 3 is the mesh schematic representation of a male rotor of two female rotors
Fig. 4 is an engagement screws section sectional schematic diagram among Fig. 2, and male rotor head number is 1, and female rotor head number is 4
Fig. 5 is an engagement screws section sectional schematic diagram among Fig. 3, and male rotor head number is 1, and female rotor head number is 4
Fig. 6 is an engagement screws section sectional schematic diagram, and male rotor head number respectively is 2, and female rotor head number is 3
Fig. 7 is an engagement screws section sectional schematic diagram, and female rotor head number respectively is 3, and male rotor head number is 2
Spiro rod section 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
Specific embodiments
Case study on implementation one
Design the differential three-screw extruder that the screw rod yi word pattern is arranged according to Fig. 1.Fig. 2 is the screw engages schematic diagram when three screw rods adopt female rotor of two male rotors among Fig. 1, and middle screw rod is a female rotor, and the two ends screw rod is a male rotor.Fig. 3 is the screw engages schematic diagrames of three screw rods among Fig. 1 when adopting male rotor of two female rotors, and middle screw rod is a male rotor, and the two ends screw rod is a female rotor.Three screw rods 5 adopt Fig. 2 or Fig. 3 spread pattern 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 is given the negative and positive rotor by reduction box 9, shaft coupling 8 with torque distribution, and the ratio of its speed is 1/4.Screw rod 5 assemblings are placed in the barrel 2 that is fixed in mount pad 7, have exhaust outlet 4 on the barrel 2, regulate temperature by outer dress heating-cooling device 3, and barrel 2, reduction box 9 and motor 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 4, 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.
As Fig. 4 and Fig. 5, three screw rods form two region of engagements, are equivalent to two pairs of twin-screws arranged side by side, can improve mixing quality and extrude output.Wherein, Fig. 4 is an engagement screws section sectional schematic diagram among Fig. 2; Fig. 5 is an engagement screws section sectional schematic diagram among Fig. 3.Comparatively speaking, the manufacturing of a female rotor of two male rotors shown in Figure 4 and keep in repair more more convenient.
Case study on implementation two
Be similar to case study on implementation one and form the differential three-screw extruder.Difference is in screw head counts difference, and the engagement differential of formation is than different.Wherein, Fig. 6 respectively is 2 for engagement screws section male rotor head number, and female rotor head number is 3,, its speed ratio is that 2/3, two male rotor is distributed in female rotor both sides; Fig. 7 respectively is 3 for female rotor head number, and male rotor head number is 2, and its speed ratio is that 3/2, two female rotor is distributed in male rotor both sides.
Case study on implementation three
Be similar to case study on implementation one and form the differential three-screw extruder.Difference is in the mixing section of screw rod at close head 1, adopts Fig. 9 and 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, remedied the hypodynamic shortcoming of distribution mixing energy perpendicular to flow direction.

Claims (3)

1. the differential three-screw extruder arranged of screw rod yi word pattern, mainly form by feeding device, machine barrel, screw rod, head, heating-cooling device, exhaust outlet, motor, transmission device, it is characterized in that: have a screw-threaded engagement district during three screw combinations at least, female rotor spiral shell rib head number in this district is the integral multiple of male rotor, the rotary speed of negative and positive rotor and spiral shell rib head number are inverse ratio, can realize the differential rotation, not interfere during motion.
2. differential three-screw extruder according to claim 1 is characterized in that: three screw rods are yi word pattern to be arranged, middle screw rod be male rotor then both sides be female rotor; Middle screw rod be female rotor then both sides be male rotor.
3. differential three-screw extruder according to claim 1, it is characterized in that: according to the material processing request, on the different sections of feeding section, melt zone, exhaust section and the metering section of screw rod, can be set to thread segment or other forms of 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 or other functions.
CN2011100855330A 2011-04-06 2011-04-06 Differential extruder with three straightly-arranged screws Pending CN102189664A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011100855330A CN102189664A (en) 2011-04-06 2011-04-06 Differential extruder with three straightly-arranged screws

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100855330A CN102189664A (en) 2011-04-06 2011-04-06 Differential extruder with three straightly-arranged screws

Publications (1)

Publication Number Publication Date
CN102189664A true CN102189664A (en) 2011-09-21

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104228037A (en) * 2014-08-22 2014-12-24 如皋市通达机械制造有限公司 Three-screw banded extruder
CN104540658A (en) * 2012-05-23 2015-04-22 约瑟夫·A.·布拉赫 Multi-screw extruder with self-cleaning conveyor screws
WO2019010594A1 (en) * 2017-07-12 2019-01-17 李晓红 Four-screw extruder
WO2019010593A1 (en) * 2017-07-12 2019-01-17 李晓红 Triple screw extruder
CN115044986A (en) * 2022-06-30 2022-09-13 武汉纺织大学 Device and method for preparing polyester fiber or polyamide fiber by chip spinning without drying

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2469988Y (en) * 2000-11-16 2002-01-09 周凤举 Double-shaft differential reverse rotary screw pair
CN1644341A (en) * 2005-01-13 2005-07-27 华南理工大学 Multi-screwrod vibrating field induction plastic milling method and apparatus
CN202079749U (en) * 2011-04-06 2011-12-21 北京化工大学 Differential three-screw extruder with straightly-arranged screws

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2469988Y (en) * 2000-11-16 2002-01-09 周凤举 Double-shaft differential reverse rotary screw pair
CN1644341A (en) * 2005-01-13 2005-07-27 华南理工大学 Multi-screwrod vibrating field induction plastic milling method and apparatus
CN202079749U (en) * 2011-04-06 2011-12-21 北京化工大学 Differential three-screw extruder with straightly-arranged screws

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104540658A (en) * 2012-05-23 2015-04-22 约瑟夫·A.·布拉赫 Multi-screw extruder with self-cleaning conveyor screws
CN104540658B (en) * 2012-05-23 2019-01-11 约瑟夫·A.·布拉赫 Multiscrew extrusion machine with automatically cleaning conveyor screw
CN104228037A (en) * 2014-08-22 2014-12-24 如皋市通达机械制造有限公司 Three-screw banded extruder
WO2019010594A1 (en) * 2017-07-12 2019-01-17 李晓红 Four-screw extruder
WO2019010593A1 (en) * 2017-07-12 2019-01-17 李晓红 Triple screw extruder
CN115044986A (en) * 2022-06-30 2022-09-13 武汉纺织大学 Device and method for preparing polyester fiber or polyamide fiber by chip spinning without drying
CN115044986B (en) * 2022-06-30 2023-07-21 武汉纺织大学 Device and method for preparing polyester fiber or polyamide fiber by slice spinning without drying

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Application publication date: 20110921