CN102189663A - Differential three-screw extruder with triangularly-arranged screws - Google Patents
Differential three-screw extruder with triangularly-arranged screws Download PDFInfo
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- CN102189663A CN102189663A CN2011100854751A CN201110085475A CN102189663A CN 102189663 A CN102189663 A CN 102189663A CN 2011100854751 A CN2011100854751 A CN 2011100854751A CN 201110085475 A CN201110085475 A CN 201110085475A CN 102189663 A CN102189663 A CN 102189663A
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- screw
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- screws
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- female rotor
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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
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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
- B29C48/395—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 invention relates to a differential three-screw extruder with triangularly-arranged screws. The differential three-screw extruder mainly comprises a feeding device, a machine barrel, screws, a machine head, a heating and cooling device, an exhaust port, a motor and a transmission device. The three screws comprise two male motors and a female rotor and are arranged in a triangular mode; when the three screws are combined, at least one thread meshing area is provided; the number of screw flight heads in the thread meshing area is integer multiples of the number of the male rotors; the rotational speeds of the male rotors and the female rotor are in an inverse proportion with the number of the spiral flight heads so as to realize the differential rotation; and the male rotors and the female rotor are not interfered during movement. The three screws can be arranged in the shape like an inverted Chinese character 'Pin', the shape like the Chinese character 'Pin' or other triangular arrangement modes. According to the machining requirement of materials, thread sections with different helical pitches and cross section molded lines or other types of thread sections can be arranged at different sections, such as a feeding section, a fusion section, a venting section and a metering section of each screw; when the three screws are installed, at least one differential rotating meshing area is ensured to be provided, and the three screws can be meshed or not meshed at different sections so as to realize the mixing enhancement, venting effect or other functions. The extruder disclosed by the invention has good capacities of mixing, plasticizing and delivery and is suitable for the machine-shaping of multiple materials such as plastics, rubbers, foods, explosive materials and the like.
Description
Technical field
The present invention relates to the differential three-screw 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, 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 CN01207223.0 develops the three-screw extruder of rounded projections arranged on the basis of double screw extruder, three screw rods are arranged in parallel, and forms three and mediates district and a center.Relative double screw 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 differential twin-screw kneader is carried out architecture advances, and increasing a screw rod, form three 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 of screw rod rounded projections arranged of the present invention 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 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; 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 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.
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 other triangle modes of emplacement, wherein a female rotor can be placed on leg-of-mutton diverse location as required.
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 rounded projections arranged
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 three screw rods
Fig. 3 be two male rotors a last male rotor under the arrangement of falling isosceles triangle mesh schematic representation
Fig. 4 is that two male rotors are at the arrangement mesh schematic representation of male rotor of a side at opposite side
Fig. 5 be two male rotors at next male rotor at the last arrangement of falling isosceles triangle mesh schematic representation
Screw rod sectional drawing when Fig. 6 adopts screw pin for the screw mixing section with pin installing hole
Side view when Fig. 7 adopts the mesh plate element for the screw mixing section
Front view when Fig. 8 adopts the mesh plate element for the screw mixing section
Specific embodiments
Case study on implementation one
Design the differential three-screw extruder of screw rod rounded projections arranged according to Fig. 1, three screw engages such as Fig. 2.Three screw rods 5 adopt spread patterns such as Fig. 3, Fig. 4 or Fig. 5 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 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 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. 6.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 three-screw extruder.Difference is in the mixing section of screw rod at close head 1, adopts Fig. 7 and mesh plate form shown in Figure 8.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 of a screw rod rounded projections arranged, mainly form by feeding device, machine barrel, screw rod, head, heating-cooling device, exhaust outlet, motor, transmission device, it is characterized in that: three screw rods are divided into two male rotors, and a female rotor is triangularly arranged; 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, does not interfere during motion.
2. differential three-screw extruder 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 other triangle modes of emplacement, wherein a female rotor can be placed on leg-of-mutton diverse location as required.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100854751A CN102189663A (en) | 2011-04-06 | 2011-04-06 | Differential three-screw extruder with triangularly-arranged screws |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100854751A CN102189663A (en) | 2011-04-06 | 2011-04-06 | Differential three-screw extruder with triangularly-arranged screws |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102189663A true CN102189663A (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100854751A Pending CN102189663A (en) | 2011-04-06 | 2011-04-06 | Differential three-screw extruder with triangularly-arranged screws |
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| Country | Link |
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| CN (1) | CN102189663A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909849A (en) * | 2012-11-13 | 2013-02-06 | 大连理工大学 | Star-shaped differential screw extruding machine |
| CN103128954A (en) * | 2013-01-28 | 2013-06-05 | 胡君 | Plastic extruder |
| CN114474649A (en) * | 2022-02-11 | 2022-05-13 | 安徽戴家工艺有限公司 | Wood-plastic plate forming equipment and forming process |
| 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 |
| WO2023046082A1 (en) * | 2021-09-24 | 2023-03-30 | 华南理工大学 | Same-direction and opposite-direction coordinated, triple-screw, enhanced plasticizing, mixing, and extrusion method and equipment |
| CN116791217A (en) * | 2023-08-21 | 2023-09-22 | 江苏青昀新材料有限公司 | Double-screw feeding system for flash spinning |
Citations (3)
| 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 |
| CN202088433U (en) * | 2011-04-06 | 2011-12-28 | 北京化工大学 | Differential three-screw extruder with triangularly arranged screws |
-
2011
- 2011-04-06 CN CN2011100854751A patent/CN102189663A/en active Pending
Patent Citations (3)
| 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 |
| CN202088433U (en) * | 2011-04-06 | 2011-12-28 | 北京化工大学 | Differential three-screw extruder with triangularly arranged screws |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102909849A (en) * | 2012-11-13 | 2013-02-06 | 大连理工大学 | Star-shaped differential screw extruding machine |
| CN103128954A (en) * | 2013-01-28 | 2013-06-05 | 胡君 | Plastic extruder |
| WO2023046082A1 (en) * | 2021-09-24 | 2023-03-30 | 华南理工大学 | Same-direction and opposite-direction coordinated, triple-screw, enhanced plasticizing, mixing, and extrusion method and equipment |
| CN114474649A (en) * | 2022-02-11 | 2022-05-13 | 安徽戴家工艺有限公司 | Wood-plastic plate forming equipment and forming process |
| 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 |
| CN116791217A (en) * | 2023-08-21 | 2023-09-22 | 江苏青昀新材料有限公司 | Double-screw feeding system for flash spinning |
| CN116791217B (en) * | 2023-08-21 | 2023-11-21 | 江苏青昀新材料有限公司 | Double-screw feeding system for flash spinning |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20110921 |