CN105856530B - Strengthen plasticizing mixing extrusion method and equipment in the three screw vibration field of force of balanced type - Google Patents
Strengthen plasticizing mixing extrusion method and equipment in the three screw vibration field of force of balanced type Download PDFInfo
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- CN105856530B CN105856530B CN201610281096.2A CN201610281096A CN105856530B CN 105856530 B CN105856530 B CN 105856530B CN 201610281096 A CN201610281096 A CN 201610281096A CN 105856530 B CN105856530 B CN 105856530B
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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
- B29C48/402—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 the screws having intermeshing parts
-
- 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
- B29C48/425—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 using three or more 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 present invention discloses a kind of three screw vibration field of force of balanced type and strengthens plasticizing mixing extrusion method and equipment, its method is one axial vibration field of force of increase on the driving screw of three screw rod systems, bidirectional feed mode is used simultaneously, while so that three screw rod systems is rotated, driving screw axial vibration, realize that material is acted on by shear action and axial vibration crush and grind simultaneously in three screw rod systems, to the plasticizing melting effect of strength imparting material.Its equipment includes hydraulic exciting device, three screw rod systems, measure and control device, driving motor and loading hopper, loading hopper is respectively set in three screw rod system both ends, the driving screw both ends of three screw rod systems are connect with hydraulic exciting device and driving motor respectively, measure and control device is set to three screw rod system sides, and driving motor and hydraulic exciting device are electrically connected with measure and control device respectively.The present invention breaks through tradition plasticizing mixing method, increases Vibrational force field, plasticizing melting effect of the strength imparting material in transmission process makes the axial resistance of Vibrational force field be eliminated using bidirectional feed.
Description
Technical field
The present invention relates to polymeric molding techniques field, more particularly to plasticizing is strengthened in a kind of three screw vibration field of force of balanced type
Mixing extrusion method and equipment.
Background technology
In recent years, plastics industry develops to high-quality, high performance, inexpensive direction, and corresponding is to need to develop
The plasticizing mixing extruder of screw extruder energy-efficient, material is adaptable, existing polymer modification processing has list
Screw rod, twin-screw and multiscrew, three-screw extruder are a kind of current emerging modifying plastics mixing extrusion equipment.
The utility model patent of Publication No. CN203919658U discloses a kind of three-screw extruder, in the extruder,
Form three screw rods by a root long screw rod and two short screws, the first half of long bolt is in feeding cylinder, long bolt it is latter half of
In packing cylinder, the first short screw, the second short screw are in feeding cylinder, feeding cylinder using three screw rods increase region of engagement from
And strength imparting material is plasticized melting effect, in packing cylinder using Single screw extrusion to reduce power consumption.Publication No.
The patent application of CN104494103A also discloses that a kind of three-screw extruder, which is in half elliptic,
The screw rod of interior three rotating Vortexes equipped with setting in equilateral triangle, the axial direction of screw rod be sequentially arranged the first mixed zone,
Second mixed zone, third mixed zone are respectively provided with different screwing elements on three sections of screw rods, and it is mixed to carry out plasticizing for different material
Refining.The patent of invention of Publication No. CN1644341A discloses a kind of three-screw extruder, main spiral shell among the three-screw extruder
Bar is superimposed a Vibrational force field, realizes axial engaging tooth gap period variation, realizes that material grinding squeezes and reinforces plasticizing.
However, in above-mentioned three kinds of three-screw extruders, first two three-screw extruder is all to utilize external heat source and machinery
It shears coefficient mechanism and is kneaded to reach material plasticizing, the plasticizing of material is improved using the simple method for increasing region of engagement
Melting effect, does not break through original plasticizing mixing mechanism, and plasticizing melting effect is still difficult to preferably be improved.And third
Although kind of three-screw extruder breaks through traditional plasticizing mixing mechanism, i.e., it is superimposed a Vibrational force field on intermediate driving screw, reinforces
Material crush and grind, but in practical applications, seriously by extrusion direction material to spiral shell when central driving screw realizes axial vibration
Bar generates powerful resistance, causes vibration (the especially vibration of large amplitude) difficult to realize, is squeezed to seriously affect three screw rods
Go out driving screw among machine and be superimposed the effect vibrated produced by a Vibrational force field, cannot achieve axial engaging tooth gap period variation
The target for reinforcing plasticizing mixing is squeezed with being ground for material.Therefore, the plasticizing melting effect of three-screw extruder need into one
Step improves.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of three screw vibration field of forces of balanced type to strengthen modeling
Change mixing extrusion method, this method breaks through tradition plasticizing mixing method, and by increasing Vibrational force field, strength imparting material is in transmission process
In plasticizing melting effect so that the axial resistance of Vibrational force field is eliminated by using bidirectional feed mode.
Another object of the present invention is to provide a kind of three screw vibration field of forces of balanced type for realizing the above method to strengthen modeling
Change mixing extrusion equipment.
The technical scheme is that：A kind of three screw vibration field of force of balanced type reinforcing plasticizing mixing extrusion method, three
Increase an axial vibration field of force on the driving screw of screw rod system, while using bidirectional feed mode, so that three screw rod systems is rotated same
When, driving screw axial vibration realizes that material is acted on by shear action and axial vibration crush and grind simultaneously in three screw rod systems,
To the plasticizing melting effect of strength imparting material.
Realize that plasticizing mixing extrusion equipment, including hydraulic exciting are strengthened in the three screw vibration field of force of balanced type of the above method
Loading hopper is respectively set in device, three screw rod systems, measure and control device, driving motor and loading hopper, three screw rod system both ends, three screw rod systems
Driving screw both ends are connect with hydraulic exciting device and driving motor respectively, and measure and control device is set to three screw rod system sides, driving motor
It is electrically connected respectively with measure and control device with hydraulic exciting device.
Three screw rod system includes three screw rods, that is, includes a driving screw and two sub-screws, two sub-screws point
Not She Yu driving screw both sides, and between each sub-screw and driving screw be intermeshed connection, three screw rods in line-styled setting.
In the three screw rod systems in line-styled arrangement, a Vibrational force field is superimposed on driving screw, which makes driving screw do axial shake
It is dynamic, realize driving screw and the variation of sub-screw axial direction back lash, to make material in barrel except in addition to by complicated shear action, also
It is acted on by axial vibration crush and grind, to which strength imparting material is plasticized melting effect.
In three screw rod system, the diameter of two sub-screws is equal, and the diameter of driving screw is greater than or equal to the straight of sub-screw
Diameter.
Three screw rod system is balance type structure, specially：Three screw rod system both ends, which are symmetrical arranged, realizes adding for bidirectional feed
Hopper, three screw rods in three screw rod systems include left-hand thread section and right-hand thread section, the screw thread knot of left-hand thread section and right-hand thread section
Structure is symmetrical, and oppositely oriented.This symmetrical structure type of screw rod can effectively offset material and be plasticized conveying forward
When to the drag effect of screw rod axial vibration, to reduce the axial dynamic loading that screw rod left and right end portions bearing is born, realize intermediate
Driving screw axial vibration.In the case where screw speed is certain, squeezing out yield can increase with the increase of oscillation intensity；It is squeezing
In the case that yield is certain, extrusion pressure is reduced with the increase of oscillation intensity, melt pressure with screw rod amplitude increase and
Reduce；Therefore, axial substantially vibration can effectively improve extruded product quality, increase yield height, reduce energy consumption.
In three screw rod system, two sub-screw rotating Vortexes, driving screw and sub-screw rotating Vortex or reverse rotation.
In three screw rod system, each screw rod is the structure type of screwing element composition, and each screw flight element is adopted
Use building block system combining structure；It is equipped with axial gap between the spiral shell rib that spiral shell rib on driving screw is meshed on sub-screw and (ensures spiral shell
Bar does not influence its radial rotating when doing axial vibration), the maximum when width of axial gap is more than driving screw axial vibration is shaken
Width, its purpose is to ensure that driving screw will not collide when doing axial vibration between screwing element and stuck phenomenon occurs, from
And ensure its radial rotating normal operation.Due to there is certain thread pitch between driving screw and sub-screw, due to drawing for vibration
The high shear for entering to form narrow gap is gone so that when driving screw does axial vibration and radial rotating, flow direction of material occurs in gap
Repeatedly variation, the interface to constantly change fluid mechanics infinitesimal are orientated, and so that interface increases, are conducive to distributed rendering；In addition,
Since the axial vibration of driving screw makes left and right gap size cyclically-varying, the crush and grind effect to material is strengthened, from
And it is conducive to dispersion mixing.
In three screw rod system, each screw rod is the structure type of kneading block composition, the kneading block on driving screw with
Axial gap is equipped between the kneading block being meshed on sub-screw, when the width of axial gap is more than driving screw axial vibration most
Large amplitude.
The three screw vibration field of force of above-mentioned balanced type strengthen plasticizing mixing extrusion equipment operation principle be：The material measured
Enter respectively from the loading hopper at three screw rod system both ends, plasticizing mixing is carried out in three screw rod systems, it can by measuring both ends inlet amount
So as to be offset to three screw acting power in the material plasticizing transmission process of both sides, to realize that driving screw whole process axial vibration provides item
Part；Region of engagement is constituted between driving screw and each sub-screw, the introducing of vibration changes the motion state of material, reduces material
Coefficient of internal friction, increase its mobility, thus make material rapid accumulation, shatter value becomes smaller, defeated in frictional drag and positive displacement
Under the action of sending, material is easy to molding and compacting, and material is made to obtain good heat transfer.
Strengthen plasticizing mixing extrusion method and equipment by introducing Vibrational force field, together in the three screw vibration field of force of above-mentioned balanced type
Shi Caiyong bidirectional feeds effectively strengthen mixed milling effect, are embodied in following several respects：
1, polytropism occurs for flow direction of material, and Equations of Polymer Melt in Oscillatory Force Field is between flight gup, radial clearance, side
Gap, tetrahedral interstice flow process seem extremely complex.The especially speed of crossing current (i.e. the flowing perpendicular with screw channel direction)
Significant change has occurred in degree field, and with the increase of vibration frequency or amplitude, flow velocity increases, shear-mixed enhancing.Crossing current makes material
Flip-flop movement is generated in screw channel, the mixing of melt is played a key role, it can promote the mixing, stirring and heat of material to hand over
It changes.
2, Vibrational force field promotes material to be contacted back and forth with barrel, increases contact area, and melt updates in contact area
Speed accelerate, to improve the melting rate of solid particle.And polymer melt can produce under the action of the periodical field of force
Lively state dissipation heat, dynamic dissipation heat raising material melts rate.
3, for rigid-particle filled polymeric system, particle generates vibration also with polymer melt together, polymerization
Object melt will destroy the viscous drag force of inorganic rigid particle and the impact of vibration the group that inorganic rigid particle originally forms
Aggressiveness, the aggregate that inorganic rigid particle is formed in polymer melt are broken up by the Vibrational force field of external stack and rapidly molten
It is spread in body, finally so that dispersibility of the inorganic rigid particle in polymer melt is improved.
4, it from microcosmic, introduce Vibrational force field and on the one hand increases mutual shearing friction between macromolecular chain, generate
The a large amount of heat that dissipates, increases high molecular energy of thermal motion, and hole also increases and swells, and intermolecular interaction force reduces, and leads
The enhancing for causing macromolecular chain to wriggle；On the other hand, vibration constantly squeezes polymer melt and is discharged, and increases molecule and takes
To intermolecular hole increases, and strand centre-of gravity shift also reduces intermolecular interaction force, to keep polymer molten
The mobility of body increases, and is conducive to material and is uniformly mixed.
The present invention compared with the existing technology, has the advantages that：
1, material plasticizing melting effect is good, and energy consumption is low.Present invention superpositing vibration power on the driving screw of three-screw extruder
, Vibrational force field causes screw rod axial direction between cog back lash and generates cyclically-varying, improves the mixture homogeneity of melt, and
Polymer melt will produce dynamic dissipation heat under the action of the periodical field of force, dynamically dissipation heat raising material melts rate, together
When reduce required external heat power consumption, reach energy-efficient effect.
2, in three screw rod systems, driving screw is easily achieved axial vibration.The structure of " balanced type " two endfeed makes material plasticizing
Three screw acting power of transmission process pair is offset, in practice, can be with to be conducive to the superpositing vibration field of force on intermediate driving screw
Realize that the amplitude of vibration reaches 2mm.
3, in three screw rod systems, different screw elements can be set on the mandrel of each screw rod, it is wide to be applicable in processing materials range
It is general, screw element can be freely combined to plasticizing mixing requirement according to different material.
Description of the drawings
Fig. 1 is the overall structure diagram that plasticizing mixing extrusion equipment is strengthened in the three screw vibration field of force of this balanced type.
Fig. 2 is structural schematic diagram when driving screw and sub-screw rotating Vortex in three screw rod systems.
Fig. 3 is structural schematic diagram when driving screw and sub-screw counter rotating in three screw rod systems.
The structural schematic diagram that Fig. 4 is three screw rods in three screw rod systems when being the arrangement of isometrical "-" type.
Fig. 5 is that three screw rods in three screw rod systems are the structural schematic diagram not waited when being arranged through "-" type.
When Fig. 6 is that the screw rod in three screw rod systems uses screwing element structure type, the gap signal between screwing element
Figure.
When Fig. 7 is that the screw rod in three screw rod systems uses kneading block structure type, the gap signal between kneading block
Figure.
Fig. 8 is that plasticizing mixing extrusion equipment is strengthened under different vibration frequencies in the three screw vibration field of force of this balanced type, is squeezed out
Flow with amplitude change schematic diagram.
Fig. 9 is that plasticizing mixing extrusion equipment is strengthened under different vibration frequencies in the three screw vibration field of force of this balanced type, melt
Pressure with amplitude change schematic diagram.
Figure 10 is that plasticizing mixing extrusion equipment is strengthened in same rotational speed and component proportion in the three screw vibration field of force of this balanced type
When, the composite material tensile strength that is squeezed out with amplitude change schematic diagram.
Figure 11 is that plasticizing mixing extrusion equipment is strengthened in same rotational speed and component proportion in the three screw vibration field of force of this balanced type
When, the composite impact intensity that is squeezed out with amplitude change schematic diagram.
Specific implementation mode
With reference to embodiment, the present invention is described in further detail, and embodiments of the present invention are not limited thereto.
Embodiment 1
Plasticizing mixing extrusion equipment is strengthened in a kind of three screw vibration field of force of balanced type of the present embodiment, as shown in Figure 1, including liquid
Charging is respectively set in pressure exciting device 1, three screw rod systems 5, measure and control device 4, driving motor 3 and loading hopper 2, three screw rod system both ends
Bucket, the driving screw both ends of three screw rod systems are connect with hydraulic exciting device and driving motor respectively, and measure and control device is set to three screw rod systems
Side, driving motor and hydraulic exciting device are electrically connected with measure and control device respectively.Its course of work is：In the control of measure and control device
Under system, driving motor drives the rotation of three screw rod systems, hydraulic exciting device to provide an axial vibration power for driving screw, driving screw is made to do
Axial-periodic is pulsed, and material is added from the loading hopper at three screw rod system both ends, and both ends feeding quantity can be adjusted according to actual conditions, material
Into after machine barrel, plasticizing mixing is simultaneously simultaneously from spiral shell under the rotary motion of three screw rod systems and the axial-periodic panting action of driving screw
Bar both ends act on by strong shearing and screw axial pulse crush and grind in machine barrel, fill to conveying in the middle part of screw rod, material
Plasticizing is divided to be kneaded, material is kneaded through the plasticizing of three screw rod systems and finally squeezes out.
Three screw rod systems include three screw rods, that is, include a driving screw 6 and two sub-screws 7, two sub-screw difference
Set on driving screw both sides, and connection is intermeshed between each sub-screw and driving screw, three screw rods are arranged in line-styled.In
In three screw rod systems of line-styled arrangement, a Vibrational force field is superimposed on driving screw, which makes driving screw do axial vibration,
Realize driving screw and the variation of sub-screw axial direction back lash, to make material in barrel except in addition to by complicated shear action, also by
It is acted on to axial vibration crush and grind, to which strength imparting material is plasticized melting effect.
In three screw rod systems, the diameter of two sub-screws is equal, and the diameter of driving screw is greater than or equal to the diameter of sub-screw.Such as
Shown in Fig. 4, the diameter of driving screw is equal to the diameter of sub-screw, i.e. three screw rods are isometrical.As shown in figure 5, the diameter of driving screw is big
In the diameter of sub-screw, i.e. three screw rods are not isometrical.
Three screw rod systems are balance type structure, specially：Three screw rod system both ends are symmetrical arranged the loading hopper for realizing bidirectional feed,
Three screw rods in three screw rod systems include left-hand thread section and right-hand thread section, and the helicitic texture of left-hand thread section and right-hand thread section is opposite
Claim, and oppositely oriented.This symmetrical structure type of screw rod can effectively be offset when material is plasticized forward conveying to spiral shell
The drag effect of bar axial vibration realizes intermediate driving screw to reduce the axial dynamic loading that screw rod left and right end portions bearing is born
Axial vibration.In the case where screw speed is certain, squeezing out yield can increase with the increase of oscillation intensity, as shown in figure 8,
The extrusion flow of extrusion equipment is as the amplitude of screw rod increases and increases；Squeeze out yield it is certain in the case of, extrusion pressure with
The increase of oscillation intensity and reduce, as shown in figure 9, melt pressure reduces with the increase of screw rod amplitude；Such as Figure 10 and Figure 11
It is shown, it is 1.67r/s in rotating speed, under different frequency, the tensile strength of PP/ wollastonites (80/20, wt%) composite material and impact
Intensity increases with the increase of amplitude, therefore, axial substantially vibration can effectively improve extruded product quality, increase yield it is high,
Reduce energy consumption.
In three screw rod systems, two sub-screw rotating Vortexes, driving screw and sub-screw rotating Vortex or reverse rotation.Such as Fig. 2
It is shown driving screw and sub-screw rotating Vortex, driving screw is illustrated in figure 3 and is reversely rotated with sub-screw.
In three screw rod systems, each screw rod is the structure type of screwing element composition, and each screw flight element is all made of product
The wooden formula composite structure；As shown in fig. 6, being equipped with axial gap m between the spiral shell rib that the spiral shell rib on driving screw is meshed on sub-screw
(ensureing that screw rod does not influence its radial rotating when doing axial vibration), when the width of axial gap is more than driving screw axial vibration
Peak swing h, its purpose is to ensure that driving screw will not collide when doing axial vibration between screwing element and occur stuck
Phenomenon, to ensure its radial rotating normal operation.Due to there is certain thread pitch between driving screw and sub-screw, due to shaking
The high shear that dynamic introducing forms narrow gap is gone so that when driving screw does axial vibration and radial rotating, material stream in gap
To repeatedly variation occurs, the interface to constantly change fluid mechanics infinitesimal is orientated, and so that interface increases, it is mixed to be conducive to distribution
It closes；In addition, since the axial vibration of driving screw makes left and right gap size cyclically-varying, the crush and grind to material is strengthened
Effect, to be conducive to dispersion mixing.
Hydraulic exciting device is using the general hydraulic exciting device in existing market.
Strengthen plasticizing mixing extrusion method in the three screw vibration field of force of balanced type realized by above equipment：In three screw rods
Increase an axial vibration field of force on the driving screw of system, while using bidirectional feed mode, it is main while so that three screw rod systems is rotated
Screw rod axial vibration realizes that material is acted on by shear action and axial vibration crush and grind simultaneously in three screw rod systems, to
The plasticizing melting effect of strength imparting material.
The three screw vibration field of force of above-mentioned balanced type strengthen plasticizing mixing extrusion equipment operation principle be：The material measured
Enter respectively from the loading hopper at three screw rod system both ends, plasticizing mixing is carried out in three screw rod systems, it can by measuring both ends inlet amount
So as to be offset to three screw acting power in the material plasticizing transmission process of both sides, to realize that driving screw whole process axial vibration provides item
Part；Region of engagement is constituted between driving screw and each sub-screw, the introducing of vibration changes the motion state of material, reduces material
Coefficient of internal friction, increase its mobility, thus make material rapid accumulation, shatter value becomes smaller, defeated in frictional drag and positive displacement
Under the action of sending, material is easy to molding and compacting, and material is made to obtain good heat transfer.
Strengthen plasticizing mixing extrusion method and equipment by introducing Vibrational force field, together in the three screw vibration field of force of above-mentioned balanced type
Shi Caiyong bidirectional feeds effectively strengthen mixed milling effect, are embodied in following several respects：
1, polytropism occurs for flow direction of material, and Equations of Polymer Melt in Oscillatory Force Field is between flight gup, radial clearance, side
Gap, tetrahedral interstice flow process seem extremely complex.The especially speed of crossing current (i.e. the flowing perpendicular with screw channel direction)
Significant change has occurred in degree field, and with the increase of vibration frequency or amplitude, flow velocity increases, shear-mixed enhancing.Crossing current makes material
Flip-flop movement is generated in screw channel, the mixing of melt is played a key role, it can promote the mixing, stirring and heat of material to hand over
It changes.
2, Vibrational force field promotes material to be contacted back and forth with barrel, increases contact area, and melt updates in contact area
Speed accelerate, to improve the melting rate of solid particle.And polymer melt can produce under the action of the periodical field of force
Lively state dissipation heat, dynamic dissipation heat raising material melts rate.
3, for rigid-particle filled polymeric system, particle generates vibration also with polymer melt together, polymerization
Object melt will destroy the viscous drag force of inorganic rigid particle and the impact of vibration the group that inorganic rigid particle originally forms
Aggressiveness, the aggregate that inorganic rigid particle is formed in polymer melt are broken up by the Vibrational force field of external stack and rapidly molten
It is spread in body, finally so that dispersibility of the inorganic rigid particle in polymer melt is improved.
4, it from microcosmic, introduce Vibrational force field and on the one hand increases mutual shearing friction between macromolecular chain, generate
The a large amount of heat that dissipates, increases high molecular energy of thermal motion, and hole also increases and swells, and intermolecular interaction force reduces, and leads
The enhancing for causing macromolecular chain to wriggle；On the other hand, vibration constantly squeezes plastic melt and is discharged, and increases molecule and takes
To intermolecular hole increases, and strand centre-of gravity shift also reduces intermolecular interaction force, to make plastic melt
Mobility increase, be conducive to material be uniformly mixed.
Embodiment 2
Plasticizing mixing extrusion equipment is strengthened in a kind of three screw vibration field of force of balanced type of the present embodiment, compared with Example 1 compared with,
The difference is that：In three screw rod systems, each screw rod is the structure type of kneading block composition, as shown in fig. 7, driving screw
On the kneading block that is meshed on sub-screw of kneading block between be equipped with axial gap m, the width of axial gap is more than driving screw
Peak swing h when axial vibration.
As described above, the present invention can be better realized, above-described embodiment is only presently preferred embodiments of the present invention, is not used
To limit the practical range of the present invention；It is i.e. all according to equivalent changes and modifications made by the content of present invention, all wanted for right of the present invention
Range claimed is asked to be covered.
Claims (5)
1. plasticizing mixing extrusion method is strengthened in the three screw vibration field of force of balanced type, which is characterized in that in the driving screw of three screw rod systems
One axial vibration field of force of upper increase, while bidirectional feed mode is used, make both sides material plasticizing by measuring both ends inlet amount
Three screw acting power are offset in transmission process, while so that three screw rod systems is rotated, driving screw axial vibration realizes material three
It is acted on simultaneously by shear action and axial vibration crush and grind in screw rod system, to the plasticizing melting effect of strength imparting material；Its
In, in the case where screw speed is certain, extrusion yield is increased by the increase of driving screw oscillation intensity；Alternatively, squeezing out
In the case that yield is certain, extrusion pressure is reduced according to the increase of driving screw oscillation intensity.
2. plasticizing mixing extrusion equipment is strengthened in the three screw vibration field of force of balanced type, which is characterized in that including hydraulic exciting device, three
Screw rod system, measure and control device, driving motor and loading hopper, three screw rod system both ends are respectively set loading hopper, and both ends loading hopper into
Doses makes to offset three screw acting power in the material plasticizing transmission process of both sides, the driving screw both ends of three screw rod systems by metering
It is connect respectively with hydraulic exciting device and driving motor, measure and control device is set to three screw rod system sides, driving motor and hydraulic exciting
Device is electrically connected with measure and control device respectively；
Three screw rod system includes three screw rods, that is, includes a driving screw and two sub-screws, and two sub-screws are set respectively
In driving screw both sides, and connection is intermeshed between each sub-screw and driving screw, three screw rods are arranged in line-styled；
In three screw rod system, each screw rod is the structure type of screwing element composition, and each screw flight element is all made of product
The wooden formula composite structure；Axial gap is equipped between the spiral shell rib that spiral shell rib on driving screw is meshed on sub-screw, axial gap
Width is more than peak swing when driving screw axial vibration；Alternatively, in three screw rod system, each screw rod is kneading block group
At structure type, axial gap is equipped between the kneading block that the kneading block on driving screw is meshed on sub-screw, between axial direction
The width of gap is more than peak swing when driving screw axial vibration；
Wherein, in the case where screw speed is certain, driving screw increases extrusion yield by the increase of oscillation intensity；Alternatively,
In the case where extrusion yield is certain, driving screw reduces extrusion pressure according to the increase of oscillation intensity.
3. plasticizing mixing extrusion equipment is strengthened in the three screw vibration field of force of balanced type according to claim 2, which is characterized in that
In three screw rod system, the diameter of two sub-screws is equal, and the diameter of driving screw is greater than or equal to the diameter of sub-screw.
4. plasticizing mixing extrusion equipment is strengthened in the three screw vibration field of force of balanced type according to claim 2, which is characterized in that
Three screw rod system is balance type structure, specially：Three screw rod system both ends are symmetrical arranged the loading hopper for realizing bidirectional feed, three spiral shells
Three screw rods in leverage include left-hand thread section and right-hand thread section, and the helicitic texture of left-hand thread section and right-hand thread section is symmetrical,
And it is oppositely oriented.
5. plasticizing mixing extrusion equipment is strengthened in the three screw vibration field of force of balanced type according to claim 2, which is characterized in that
In three screw rod system, two sub-screw rotating Vortexes, driving screw and sub-screw rotating Vortex or reverse rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610281096.2A CN105856530B (en) | 2016-04-29 | 2016-04-29 | Strengthen plasticizing mixing extrusion method and equipment in the three screw vibration field of force of balanced type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610281096.2A CN105856530B (en) | 2016-04-29 | 2016-04-29 | Strengthen plasticizing mixing extrusion method and equipment in the three screw vibration field of force of balanced type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105856530A CN105856530A (en) | 2016-08-17 |
| CN105856530B true CN105856530B (en) | 2018-10-09 |
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| CN109825048B (en) * | 2019-02-20 | 2021-03-30 | 华南理工大学 | PLA/PBAT composite material and preparation method thereof |
| CN111098468B (en) * | 2019-12-30 | 2021-08-10 | 华南理工大学 | 3D printing wire rod of rABS/SEBS-g-MAH and preparation method thereof |
| CN111319211B (en) * | 2020-03-11 | 2021-05-04 | 苏州喜全软件科技有限公司 | Continuous forming printing device for plastic extrusion pipe fitting |
| CN112297207B (en) * | 2020-10-27 | 2022-03-15 | 张家界中美新材料科技有限公司 | Quartz stone plate forming equipment of gradual skinning |
| CN113400617A (en) * | 2021-05-27 | 2021-09-17 | 华南理工大学 | Vertical multi-screw strong shearing plasticizing mixing extrusion processing device |
| CN114474670A (en) * | 2021-09-24 | 2022-05-13 | 华南理工大学 | Bidirectional synergistic three-screw reinforced plasticizing mixing extrusion method and equipment |
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| CN1321788C (en) * | 2005-01-13 | 2007-06-20 | 华南理工大学 | Multi-screwrod vibrating field induction plastic milling method and apparatus |
| CN201482457U (en) * | 2009-08-07 | 2010-05-26 | 吴国平 | Two-way helical extrusion granulator |
| CN102126280A (en) * | 2010-01-15 | 2011-07-20 | 朱康生 | Convection-current equidirectional double-screw extruder |
| CN102896759B (en) * | 2012-10-18 | 2015-03-11 | 华南理工大学 | Rotation and axial vibration synergic driving method and device for screw rod of directly-driven dynamic extruder |
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