CN101823327B - Seven screw planet combined plasticizing, exhausting and extruding device and method - Google Patents
Seven screw planet combined plasticizing, exhausting and extruding device and method Download PDFInfo
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- CN101823327B CN101823327B CN2010101741883A CN201010174188A CN101823327B CN 101823327 B CN101823327 B CN 101823327B CN 2010101741883 A CN2010101741883 A CN 2010101741883A CN 201010174188 A CN201010174188 A CN 201010174188A CN 101823327 B CN101823327 B CN 101823327B
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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
- B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
- B29B7/485—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws with three or more shafts provided with screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
- B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
- B29B7/489—Screws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/84—Venting or degassing ; Removing liquids, e.g. by evaporating components
- B29B7/845—Venting, degassing or removing evaporated components in devices with rotary stirrers
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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
- B29C48/435—Sub-screws
- B29C48/44—Planetary screws
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to a seven planet screw combination device and method for plastifing, exhausting and extruding, comprising a screw mechanism, a cylinder, a material inlet, an air exhaust, a material outlet and a power mechanism. The screw mechanism comprises a center screw and six planet screws; the axis of the center screw is coincident with the axis of the cylinder; the axes of the six planet screws are all parallel to the axis of the center screw and surrounds the center screw; the center screw is meshed with each planet screw; each planet screw is meshed with two adjacent planet screws; the lines connecting the center of each planet screw form a regular hexagon; the center distance of any two adjacent planet screws is equal to the length of a side of the regular hexagon; the center screw is arranged in the center of the regular hexagon; and the power mechanism is respectively connected with the screw mechanism and the cylinder. The invention also provides a method for plastifing, exhausting and extruding. The invention has the advantages of adjustable retention time, low power consumption, thorough air exhaust and self-cleaning function, etc.
Description
Technical field
The present invention relates to the high polymer material plasticizing exhaust and extrude process technology, particularly a kind of seven planet screw combination plasticizing exhaust extruder and method thereof.
Background technology
In recent years, field of high polymer material processing constantly strides forward towards energy-saving and cost-reducing, green processing direction.High-speed machining, Precision Machining, the phase structure control of material microcosmic and remote intelligent are to give priority to direction future.As process technology, be provided to final control of product quality from the raw material entering, experience plurality of processes such as Solid Conveying and Melting, exhaust, fusion, melt Conveying.At present, the process equipment that extensively adopts mainly contains single screw extrusion machine, double screw extruder etc.Material melt Conveying process realizes through shear flow, elongational flow that mainly traditional extruder generally all exists problems such as poor, the self-cleaning characteristic of mixed performance of material processing is poor, exhaust effect difference.In order to address these problems, a kind of double screw extruder of self-clean type has in the same way appearred, and this extruder has certain mixed performance, self-cleaning characteristic, exhaust effect; Obtained extensive use in macromolecular material filling, modification, blend and reaction field such as extrude, its principle is: two screw-rod structures are identical, differ certain phase angle during installation; Phase place is different and different with number of starts; Centre-to-centre spacing is relevant with number of starts and drift angle, and the rotating speed of two screw rods is identical in the process, for reaching self-cleaning effect in the process; Require to scan scraping each other between screw rod; From the viewpoint of relative motion, the phase place of two screw rods remains unchanged, and does translational motion each other.Problems such as poor, the self-cleaning characteristic of mixed performance of material processing is poor though this structure can tentatively solve, exhaust effect difference; But still exist following defective: there is this symmetry in (1) two screw rod; Fluid exists becoming second nature along the geometric space that experiences during two screw rods move ahead process, and the effect of orientation again of shear history median surface weakens, and mixed effect is limited; Especially the most of fluid that is positioned at the screw channel middle part mixes and still belongs to the laminar flow mixing; The interface is linear in time to be increased, and the effect that material is processed can not keep effectively for a long time, can weaken along with the time of processing; (2) existing research shows, parallel dual-screw can only produce immixture effectively to the top layer fluid near wall district, and especially the effect of region of engagement is obvious especially, and overall core fluid mixes in addition raising space greatly; (3) the chaotic flow technology is the effective way that current high viscosity fluid mixes; Be further to promote mixed effect, improve the effective rate of utilization of energy, adopt that to increase plasticizing, exhaust, mixing efficiency that the engagement number of times improves material processing be unusual valid approach; Free area through increasing screw surface and force macromolecule material to be used for through the region of engagement that to strengthen above process very effective; Key is to distribute the control time of staying, makes equipment technology have automatic cleaning action, and traditional planetary-screw technology is exactly from such consideration; But traditional planetary-screw extruding technology center bolt and planetary-screw are incorgruous rotations; The automatically cleaning effect that has lacked common concern in the engineering material process, the time of staying distributes restive, and range of application is very narrow.
For this reason; As required; A kind of planetary-screw plasticizing, exhaust extruding technology with automatic cleaning action need be provided; Can effectively solve the time of staying distribution control problem when increasing substantially the mixing exhaust effect, for the high speed that solves macromolecular material, efficient, high accuracy problem provide new technology.
Summary of the invention
For the shortcoming and deficiency that overcome prior art, primary and foremost purpose of the present invention is to provide plasticizing in a kind of processing of high molecular material process, good mixing effect, exhaust efficiency is high and seven planet screw that have automatic cleaning action combination plasticizing exhaust extruder.
Another object of the present invention is to provide the seven planet screw combination plasticizing exhaust of realizing by said apparatus extrusion method.
The object of the invention is realized through following technical proposals: seven planet screw combination plasticizing exhaust extruder; Comprise screw mechanism, machine barrel, charging aperture, exhaust outlet, discharging opening and actuating unit; Said actuating unit is located at the both ends of machine barrel respectively, and is connected with screw mechanism; Said screw mechanism is located at machine barrel inside, and horizontal positioned, is solid conveying section, melt zone, exhaust section and mixing extruding zone with machine barrel inside; Said charging aperture is located at the machine barrel top of solid conveying section, and exhaust outlet is located at the machine barrel top of exhaust section, and charging aperture and exhaust outlet all are communicated with machine barrel; Discharging opening is located at the end of machine barrel, and said screw mechanism comprises center bolt and six planetary-screws, the axis of center bolt and the dead in line of machine barrel; The axis of six planetary-screws all with the parallel axes of center bolt, and around center bolt, distribute; Center bolt is connected with a joggle with six planetary-screws simultaneously, and each planetary-screw is connected with a joggle with two adjacent planetary-screws respectively;
Said actuating unit is connected with center bolt and six planetary-screws;
The screw thread outer contour of each planetary-screw is all tangent with machine tube inner wall.
The line at the center of said six planetary-screws is regular hexagon, and the centre-to-centre spacing of per two adjacent planetary-screws equates that with the orthohexagonal length of side center bolt is located at orthohexagonal center.
Each planetary-screw and center bolt all adopt the three-start screw structure, and its drift angle scope is 0～20 degree.
The inner chamber of said machine barrel is a cylindrical cavity, and its inner surface is the smooth face of cylinder; Perhaps, the inner chamber of said machine barrel is a cylindrical cavity, and its inner surface is provided with several cylinder grooves that cooperates with planetary-screw.
Each planetary-screw is at the spiro rod section of melt zone and be equipped with three at the spiro rod section of exhaust section and mediate pieces.
Said actuating unit comprises gear one, gear two, driving mechanism, gear drive and auxiliary motor, and gear one and gear two are located at the two ends of machine barrel respectively, and gear two is connected with the machine barrel movable sealing; Said gear drive is connected with auxiliary motor, and difference connection gear one and gear two;
One end of six planetary-screws is connected with gear two, and its other end is connected with gear one and passes gear one and is connected with driving mechanism; The centre bore that one end of center bolt passes gear one is connected with driving mechanism, and its other end is located at the other end of machine barrel;
Said gear drive comprises travelling gear one, travelling gear two and power transmission shaft; Travelling gear one is connected with a joggle with gear one; Travelling gear two is connected with a joggle with gear two, and the two ends of power transmission shaft connect travelling gear one and travelling gear two respectively, and travelling gear one is connected with said auxiliary motor.
Said gear two is provided with cannelure at the end face that cooperates with machine barrel; The end of said machine barrel places in the cannelure, and its outer wall is connected through thrust bearing assembly and axial location ring and gear two, and the inwall of machine barrel is connected with the cannelure matched in clearance of gear;
The inwall of said machine barrel is provided with several convex bodys, and the cannelure inwall of gear two is provided with several grooves, the groove matched in clearance of the convex body of machine barrel and gear two; Or the inwall of said machine barrel is provided with several grooves, and the cannelure inwall of gear two is provided with several convex bodys, the convex body matched in clearance of the groove of machine barrel and gear two;
The centre bore of said gear two is described discharging opening.
Said actuating unit is a driving mechanism, and a wherein end of said center bolt and six planetary-screws all is connected through output shaft with driving mechanism, and the other end all places the other end of machine barrel.
The seven planet screw of being realized by said apparatus makes up the plasticizing exhaust extrusion method; Utilize center bolt and six periodicity plasticizing exhaust extrusion space and region of engagement strong shear action conveying effects that planetary-screw rotation gear motion produces; Planetary-screw axis and center bolt parallel axes; Identical and the rotating speed of the direction of the rotation direction of center bolt and planetary-screw rotation equates; The direction and the center bolt switched in opposite of planetary-screw revolution, planetary-screw is adjustable around the revolution speed of machine barrel central axis revolution, regulates time of staying distribution within the specific limits; Material is carried out positive feed, disperses fusion, strengthens mixing plasticizing, strengthens exhaust and last voltage stabilizing is extruded, specifically comprise the steps:
(1) after material gets into machine barrel from charging aperture; Center bolt rotates around the machine barrel central axis under the driving of actuating unit, and each planetary-screw centers on axis rotation separately, simultaneously; Gear one and gear two rotations, and drive each planetary-screw around the revolution of machine barrel central axis; Material gets into solid conveying section, under each planetary-screw forced conveyance is used, realizes its charging conveying, because its space dwindles gradually, material is compressed effect, forces material to move to the discharging opening direction;
(2) material movement is to when the melt zone place; Scan at the planet of the turning effort in the same way of each planetary-screw and center bolt and each planetary-screw under the effect of the periodicity plasticizing extrusion space that motion produces, the strong shearing in the region of engagement between each screw rod seethed stirring to material, and material is melted; Make fusant material and not blow body material generation strong convection motion simultaneously; Augmentation of heat transfer takes place to disperse fusion, makes material before melt zone finishes, become melt;
(3) melt gets into exhaust section; The screw channel space sudden enlargement of planetary-screw and center bolt, the strong shear action in the region of engagement between each screw rod is constantly stirred material, and periodic spatial variations produces scavenging action; Gas is discharged from exhaust outlet, and melt further moves to the discharging opening direction;
(4) melt gets into mixing extruding zone; The screw channel space of planetary-screw and center bolt further dwindles and remains unchanged; Planetary-screw and center bolt act on down and produce the periodically pulsing space in relative rotation, and melt moves ahead under the promotion in periodically pulsing space, and shear by force and the effect of orientation again at interface the region of engagement; Material is carried out mixing plasticizing, under the friction effect of dragging that reaches between the planetary-screw between planetary-screw and the center bolt, melt is stablized and extruded from discharging opening.
The sense of rotation of each planetary-screw is identical with the direction of rotation of center bolt, and the spin velocity of each planetary-screw equates with the angular velocity of rotation of center bolt; The revolution direction of each planetary-screw is opposite with the direction of rotation of center bolt; The revolution speed of each planetary-screw is regulated through the rotating speed of gear one and gear two; And can regulate within the specific limits, control residence time of material through the revolution speed of regulating each planetary-screw.
The present invention compared with prior art has following advantage and beneficial effect:
1, the present invention has adopted the planetary-screw positive feed, has improved Solid Conveying and Melting efficient, can increase greatly to extrude output, is applicable to big output processing.
2, the present invention adopts the planetary body that seven screw rods are formed, and seven screw rods rotate around axis separately in the same way, and wiping has automatic cleaning action each other; Region of engagement quantity is increased to 12; Be six times of common parallel dual-screw, and scan engagement, significantly changed material melting mechanism and process through the revolution of planetary-screw; Heat, the mechanical course of accomplishing plasticizing are shortened greatly, and energy consumption is low, energy conservation and consumption reduction effects is remarkable.
3, the present invention is provided with three and mediates piece on the planetary-screw of exhaust section, and under the effect of scanning of planetary-screw, realizes exhaust, and exhaust efficiency and completeness significantly improve.
4, the present invention can regulate residence time of material within the specific limits and distribute, and make the time of staying adjustable through regulating the revolution speed of planetary-screw; Because the revolution direction is opposite with its sense of rotation; Further improved relative rotation speed; And strengthened mixed milling intensity and effect comprehensively, and have extremely excellent dispersed and distributed mixed effect, be particularly useful for high yield, nano material, reaction and the occasion harsh such as extrude mixing exhaust requirements.
5, the present invention realizes its charging conveying under each planetary-screw forced conveyance is used; With between each planetary-screw and the towing of the friction between planetary-screw and the center bolt carry and organically combine, have that the stability that plasticizing transports is high, a good stability of pressure and to the advantages such as wide adaptability of material.
6, the present invention is through the cooperate swivel feeding of planetary-screw with center bolt, and interface tension is realized even feeding uniformly, phase structure control good uniformity.
Description of drawings
Fig. 1 is the structural representation of embodiments of the invention 1.
Fig. 2 is that enlarged diagram is dissectd at A-A shown in Figure 1 place.
Fig. 3 is the local enlarged diagram in B shown in Figure 1 place.
Fig. 4 is the structural representation of embodiments of the invention 2.
Fig. 5 is the structural representation of embodiments of the invention 3.
Fig. 6 is that enlarged diagram is dissectd at C-C shown in Figure 5 place.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described in further detail, but embodiment of the present invention is not limited thereto.
Fig. 1～Fig. 3 shows the concrete structure sketch map of present embodiment; As shown in Figure 1; This seven planet screw combination plasticizing exhaust extruder; Comprise screw mechanism, machine barrel 1, charging aperture 2, exhaust outlet 5, discharging opening 6 and actuating unit, said actuating unit is located at the both ends of machine barrel 1 respectively, and is connected with screw mechanism; Said screw mechanism is located at machine barrel 1 inside, and horizontal positioned, is solid conveying section 15, melt zone 16, exhaust section 17 and mixing extruding zone 18 with machine barrel 1 inside; Said charging aperture 2 is located at machine barrel 1 top of solid conveying section 15, and exhaust outlet 5 is located at machine barrel 1 top of exhaust section 17, and charging aperture 2 all is communicated with machine barrel 1 with exhaust outlet 5; Discharging opening 6 is located at the end of machine barrel 1, and said screw mechanism comprises center bolt 4 and six planetary-screws 3, the dead in line of the axis of center bolt 4 and machine barrel 1; The axis of six planetary-screws 3 all with the parallel axes of center bolt 4, and around center bolt 4, distribute; Center bolt 4 is connected with a joggle with six planetary-screws 3 simultaneously, and each planetary-screw 3 is connected with a joggle with two adjacent planetary-screws 3 respectively;
Said actuating unit comprises gear 1, gear 27, driving mechanism 14, gear drive and auxiliary motor, and gear 1 and gear 27 are located at the two ends of machine barrel 1 respectively, and gear 27 is connected with machine barrel 1 movable sealing; Said gear drive is connected with auxiliary motor, and difference connection gear 1 and gear 27;
One end of six planetary-screws 3 is connected with gear 27, and its other end is connected with gear 1 and passes gear 1 and is connected with driving mechanism 14; The centre bore that one end of center bolt 4 passes gear 1 is connected with driving mechanism 14, and its other end is located at the other end of machine barrel 1;
The screw thread outer contour of each planetary-screw 3 is all tangent with the inwall of machine barrel 1.
Said gear drive comprises travelling gear 1, travelling gear 2 10 and power transmission shaft 11; Travelling gear 1 is connected with a joggle with gear 1; Travelling gear 2 10 is connected with a joggle with gear 27; The two ends of power transmission shaft 11 connect travelling gear 1 and travelling gear 2 10 respectively, and travelling gear 1 is connected with said auxiliary motor.
As shown in Figure 2, the line at the center of said six planetary-screws 3 is regular hexagon, and the centre-to-centre spacing of per two adjacent planetary-screws 3 equates that with the orthohexagonal length of side center bolt 4 is located at orthohexagonal center.The inner chamber of said machine barrel 1 is a cylindrical cavity, and its inner surface is the smooth face of cylinder.
Each planetary-screw 3 all adopts the three-start screw structure with center bolt 4, and its drift angle is 15 degree.
As shown in Figure 3, gear 27 is connected with machine barrel 1 movable sealing, that is: said gear 27 is provided with cannelure at the end face that cooperates with machine barrel 1; The end of said machine barrel 1 places in the cannelure, and its outer wall is connected through thrust bearing assembly 8 and axial location ring 9 and gear 27, and the inwall of machine barrel 1 is connected with the cannelure matched in clearance of gear; The inwall of said machine barrel 1 is provided with several convex bodys 19, and the cannelure inwall of gear 27 is provided with several grooves 20, the convex body 19 of machine barrel 1 and groove 20 matched in clearance of gear 27.
Said axial location ring 9 is connected with gear 27 through screw.
The centre bore of said gear 27 is described discharging opening 6.
The seven planet screw combination plasticizing exhaust extrusion method that said apparatus is realized; Utilize center bolt 4 and six the strong shear action conveying of periodicity plasticizing exhaust extrusion space and region of engagement effects that planetary-screw 3 rotation gear motions produce; Planetary-screw 3 axis and center bolt 4 parallel axes; Identical and the rotating speed of the direction of the rotation direction of center bolt 4 and planetary-screw 3 rotations equates; The direction and center bolt 4 switched in opposite of planetary-screw 3 revolution, planetary-screw 3 is adjustable around the revolution speed of machine barrel 1 central axis revolution, regulates time of staying distribution within the specific limits; Material is carried out positive feed, disperses fusion, strengthens mixing plasticizing, strengthens exhaust and last voltage stabilizing is extruded, specifically comprise the steps:
(1) after material gets into machine barrel 1 from charging aperture 2; Center bolt 4 rotates around machine barrel 1 central axis under the driving of driving mechanism 14; The axis rotation that each planetary-screw 3 centers on separately, simultaneously, under the driving of auxiliary motor; Gear 1 and gear 27 rotations, and drive each planetary-screw 3 around the revolution of machine barrel 1 central axis; Material gets into solid conveying section 15, under each planetary-screw 3 forced conveyance is used, realizes its charging conveying, because its space dwindles gradually, material is compressed effect, forces material to move to discharging opening 6 directions;
(2) material movement is to when melt zone 16 places; Scan at the planet of the turning effort in the same way of each planetary-screw 3 and center bolt 4 and each planetary-screw 3 under the effect of the periodicity plasticizing extrusion space that motion produces, the strong shearing in the region of engagement between each screw rod seethed stirring to material, and material is melted; Make fusant material and not blow body material generation strong convection motion simultaneously; Augmentation of heat transfer takes place to disperse fusion, makes material before melt zone 16 finishes, become melt;
(3) melt gets into exhaust section 17; The screw channel space sudden enlargement of planetary-screw 3 and center bolt 4; The strong shear action in region of engagement between each screw rod is constantly stirred material; Periodic spatial variations produces scavenging action, and gas is discharged from exhaust outlet 5, and melt further moves to discharging opening 6 directions;
(4) melt gets into mixing extruding zone 18; The screw channel space of planetary-screw 3 and center bolt 4 further dwindles and remains unchanged; Planetary-screw 3 and center bolt 4 act in relative rotation and produce down the periodically pulsing space, and melt moves ahead under the promotion in periodically pulsing space, and shear by force and the effect of orientation again at interface the region of engagement; Material is carried out mixing plasticizing, under the friction effect of dragging that reaches between the planetary-screw 3 between planetary-screw 3 and the center bolt 4, melt is stablized and extruded from discharging opening 6.
The sense of rotation of each planetary-screw 3 is identical with the direction of rotation of center bolt 4, and the spin velocity of each planetary-screw 3 equates with the angular velocity of rotation of center bolt 4; The revolution direction of each planetary-screw 3 is opposite with the direction of rotation of center bolt 4, and the revolution speed of each planetary-screw 3 is regulated through gear 1 and gear 27 within the specific limits, with the control residence time of material.
Present embodiment except that following characteristics other structures with embodiment 1: as shown in Figure 4, each planetary-screw 3 is provided with three at the spiro rod section of melt zone 16 and mediates pieces 22 and connect, and is provided with three at the spiro rod section of exhaust section 17 and mediates pieces 21 and connect.
Present embodiment except that following characteristics other structures with embodiment 1: as shown in Figure 5; Said actuating unit is a driving mechanism 24; A wherein end of said center bolt 4 and six planetary-screws 3 all is connected through output shaft with driving mechanism 24, and the other end is located at the other end of machine barrel.At this moment, when extruding operation, each planetary-screw 3 is zero around machine barrel 1 central axis revolution speed, and promptly each planetary-screw 3 only centers on axis rotation separately under the driving of driving mechanism 24.
As shown in Figure 6, the inner chamber of said machine barrel 1 is a cylindrical cavity, and its inner surface is provided with six cylinder grooves 23 that cooperate with each planetary-screw 3.
Present embodiment except that following characteristics other structures with embodiment 1: the inner chamber of said machine barrel is a cylindrical cavity, and its inner surface is provided with six cylinder grooves that cooperate with each planetary-screw.
Present embodiment except that following characteristics other structures with embodiment 1: each planetary-screw and center bolt all adopt the three-start screw structure, and its drift angle is 20 degree.
Present embodiment except that following characteristics other structures with embodiment 1: each planetary-screw and center bolt all adopt the three-start screw structure, and its drift angle is 0 degree.
Present embodiment except that following characteristics other structures with embodiment 1: the inwall of said machine barrel is provided with several grooves, and the cannelure inwall of gear two is provided with several convex bodys, the convex body matched in clearance of the groove of machine barrel and gear two.Said axial location ring is connected with gear two through helicitic texture.
Above-mentioned each embodiment is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. seven planet screw combination plasticizing exhaust extruder comprises screw mechanism, machine barrel, charging aperture, exhaust outlet, discharging opening and actuating unit, and said actuating unit is located at the both ends of machine barrel respectively, and is connected with screw mechanism; Said screw mechanism is located at machine barrel inside, and horizontal positioned, is solid conveying section, melt zone, exhaust section and mixing extruding zone with machine barrel inside; Said charging aperture is located at the machine barrel top of solid conveying section, and exhaust outlet is located at the machine barrel top of exhaust section, and charging aperture and exhaust outlet all are communicated with machine barrel; Discharging opening is located at the end of machine barrel, it is characterized in that: said screw mechanism comprises center bolt and six planetary-screws, the axis of center bolt and the dead in line of machine barrel; The axis of six planetary-screws all with the parallel axes of center bolt, and around center bolt, distribute; Center bolt is connected with a joggle with six planetary-screws simultaneously, and each planetary-screw is connected with a joggle with two adjacent planetary-screws respectively;
Said actuating unit is connected with center bolt and six planetary-screws;
The screw thread outer contour of each planetary-screw is all tangent with machine tube inner wall.
2. seven planet screw combination plasticizing exhaust extruder according to claim 1; It is characterized in that: the line at the center of said six planetary-screws is regular hexagon; The centre-to-centre spacing of per two adjacent planetary-screws equates that with the orthohexagonal length of side center bolt is located at orthohexagonal center.
3. seven planet screw combination plasticizing exhaust extruder according to claim 1, it is characterized in that: each planetary-screw and center bolt all adopt the three-start screw structure, and its drift angle scope is 0～20 degree.
4. seven planet screw combination plasticizing exhaust extruder according to claim 1, it is characterized in that: the inner chamber of said machine barrel is a cylindrical cavity, its inner surface is the smooth face of cylinder; Perhaps, the inner chamber of said machine barrel is a cylindrical cavity, and its inner surface is provided with several cylinder grooves that cooperates with planetary-screw.
5. seven planet screw according to claim 1 combination plasticizing exhaust extruder is characterized in that: each planetary-screw is at the spiro rod section of melt zone and be equipped with three at the spiro rod section of exhaust section and mediate pieces.
6. according to each described seven planet screw combination plasticizing exhaust extruder of claim 1～5; It is characterized in that: said actuating unit comprises gear one, gear two, driving mechanism, gear drive and auxiliary motor; Gear one and gear two are located at the two ends of machine barrel respectively, and gear two is connected with the machine barrel movable sealing; Said gear drive is connected with auxiliary motor, and difference connection gear one and gear two;
One end of six planetary-screws is connected with gear two, and its other end is connected with gear one and passes gear one and is connected with driving mechanism; The centre bore that one end of center bolt passes gear one is connected with driving mechanism, and its other end is located at the other end of machine barrel;
Said gear drive comprises travelling gear one, travelling gear two and power transmission shaft; Travelling gear one is connected with a joggle with gear one; Travelling gear two is connected with a joggle with gear two, and the two ends of power transmission shaft connect travelling gear one and travelling gear two respectively, and travelling gear one is connected with said auxiliary motor.
7. seven planet screw combination plasticizing exhaust extruder according to claim 6, it is characterized in that: said gear two is provided with cannelure at the end face that cooperates with machine barrel; The end of said machine barrel places in the cannelure, and its outer wall is connected through thrust bearing assembly and axial location ring and gear two, and the inwall of machine barrel is connected with the cannelure matched in clearance of gear;
The inwall of said machine barrel is provided with several convex bodys, and the cannelure inwall of gear two is provided with several grooves, the groove matched in clearance of the convex body of machine barrel and gear two; Or the inwall of said machine barrel is provided with several grooves, and the cannelure inwall of gear two is provided with several convex bodys, the convex body matched in clearance of the groove of machine barrel and gear two;
The centre bore of said gear two is described discharging opening.
8. according to each described seven planet screw combination plasticizing exhaust extruder of claim 1～5; It is characterized in that: said actuating unit is a driving mechanism; A wherein end of said center bolt and six planetary-screws all is connected through output shaft with driving mechanism, and the other end all places the other end of machine barrel.
9. the seven planet screw combination plasticizing exhaust extrusion method of each said device realization of claim 1～8 is characterized in that, specifically comprises the steps:
(1) after material gets into machine barrel from charging aperture; Center bolt rotates around the machine barrel central axis under the driving of actuating unit, and each planetary-screw centers on axis rotation separately, simultaneously; Gear one and gear two rotations, and drive each planetary-screw around the revolution of machine barrel central axis; Material gets into solid conveying section, under each planetary-screw forced conveyance is used, realizes its charging conveying, because its space dwindles gradually, material is compressed effect, forces material to move to the discharging opening direction;
(2) material movement is to when the melt zone place; Scan at the planet of the turning effort in the same way of each planetary-screw and center bolt and each planetary-screw under the effect of the periodicity plasticizing extrusion space that motion produces, the strong shearing in the region of engagement between each screw rod seethed stirring to material, and material is melted; Make fusant material and not blow body material generation strong convection motion simultaneously; Augmentation of heat transfer takes place to disperse fusion, makes material before melt zone finishes, become melt;
(3) melt gets into exhaust section; The screw channel space sudden enlargement of planetary-screw and center bolt, the strong shear action in the region of engagement between each screw rod is constantly stirred material, and periodic spatial variations produces scavenging action; Gas is discharged from exhaust outlet, and melt further moves to the discharging opening direction;
(4) melt gets into mixing extruding zone; The screw channel space of planetary-screw and center bolt further dwindles and remains unchanged; Planetary-screw and center bolt act on down and produce the periodically pulsing space in relative rotation, and melt moves ahead under the promotion in periodically pulsing space, and shear by force and the effect of orientation again at interface the region of engagement; Material is carried out mixing plasticizing, under the friction effect of dragging that reaches between the planetary-screw between planetary-screw and the center bolt, melt is stablized and extruded from discharging opening.
10. seven planet screw combination plasticizing exhaust extrusion method according to claim 9; It is characterized in that: the sense of rotation of each planetary-screw is identical with the direction of rotation of center bolt, and the spin velocity of each planetary-screw equates with the angular velocity of rotation of center bolt; The revolution direction of each planetary-screw is opposite with the direction of rotation of center bolt.
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| CN2010101741883A CN101823327B (en) | 2010-05-10 | 2010-05-10 | Seven screw planet combined plasticizing, exhausting and extruding device and method |
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| CN2010101741883A CN101823327B (en) | 2010-05-10 | 2010-05-10 | Seven screw planet combined plasticizing, exhausting and extruding device and method |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5190500B2 (en) * | 2010-09-30 | 2013-04-24 | 株式会社日本製鋼所 | Plastic extrusion method and apparatus |
| US8597553B1 (en) * | 2012-05-31 | 2013-12-03 | Mohawk Industries, Inc. | Systems and methods for manufacturing bulked continuous filament |
| CN103317731B (en) * | 2013-05-29 | 2015-07-08 | 北京华腾佳和科技有限公司 | Device and method for preparation of ultra-high molecular-weight polyethylene sheet |
| CN104960178B (en) * | 2015-07-20 | 2017-08-01 | 无锡科技职业学院 | A kind of planet multiple screw extruder |
| CN108656497A (en) * | 2017-03-27 | 2018-10-16 | 南京越升挤出设备有限公司 | A kind of multiscrew planetary extruder |
| CN106926430A (en) * | 2017-04-28 | 2017-07-07 | 广东轻工职业技术学院 | Rotating ratio is 2.5 self-clean type multi-screw extruder in the same direction and extrusion method |
| CN109833787A (en) * | 2019-03-21 | 2019-06-04 | 发泰（天津）科技有限公司 | A kind of multiscrew material machine |
| CN113787700B (en) * | 2021-08-13 | 2022-12-02 | 重庆沃特智成新材料科技有限公司 | Film blowing device |
| CN113829607A (en) * | 2021-09-08 | 2021-12-24 | 青岛新大成塑料机械有限公司 | Multi-stage vented extruder and method of use |
| CN113799363A (en) * | 2021-09-15 | 2021-12-17 | 青岛新大成塑料机械有限公司 | Extrusion equipment with automatic exhaust function |
| CN114345219A (en) * | 2021-12-28 | 2022-04-15 | 华南理工大学 | Suspension conjugate rotor continuous mixing and dispersing device |
| CN116968294B (en) * | 2023-08-02 | 2024-01-30 | 舟山市欧胜达塑料机械有限公司 | Planetary screw extruder |
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| DE3937612A1 (en) * | 1989-02-24 | 1990-08-30 | Rust & Mitschke Entex | Planetary extruder screw arrangement for PVC - having tapered outlet ends of planetary screw spindles and have domed supporting pivot having bevelled edge inlet end |
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|---|---|---|---|---|
| US1356296A (en) * | 1919-08-25 | 1920-10-19 | Joseph A Buttress | Mixing-machine |
| DE2906324C2 (en) * | 1979-02-19 | 1982-06-24 | Hermann Berstorff Maschinenbau Gmbh, 3000 Hannover | Multi-stage device for plasticizing and extrusion of plastic masses |
| JPH07205256A (en) * | 1993-07-21 | 1995-08-08 | Josef Blach | Multi-screw machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3937612A1 (en) * | 1989-02-24 | 1990-08-30 | Rust & Mitschke Entex | Planetary extruder screw arrangement for PVC - having tapered outlet ends of planetary screw spindles and have domed supporting pivot having bevelled edge inlet end |
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