CN106426859A - Extrusion method and die achieving synergistic effect of ultrasonic vibration and uniform tensile stress - Google Patents
Extrusion method and die achieving synergistic effect of ultrasonic vibration and uniform tensile stress Download PDFInfo
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- CN106426859A CN106426859A CN201610955244.4A CN201610955244A CN106426859A CN 106426859 A CN106426859 A CN 106426859A CN 201610955244 A CN201610955244 A CN 201610955244A CN 106426859 A CN106426859 A CN 106426859A
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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
- B29C48/30—Extrusion nozzles or dies
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
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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
- B29C48/30—Extrusion nozzles or dies
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- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an extrusion method and die achieving the synergistic effect of ultrasonic vibration and uniform tensile stress. The extrusion die comprises a die body, a first ultrasonic vibration device and a second ultrasonic vibration device. The first ultrasonic vibration device and the second ultrasonic vibration device each mainly comprise an amplitude-change rod, a vibration transmission rod, a transducer, a signal line and an ultrasonic generator; through holes are symmetrically formed in the die body; the small ends of the amplitude-change rods of the first ultrasonic vibration device and the second ultrasonic vibration device communicate with a die runner through the through holes; and the amplitude-change rods extend into the through holes of the extrusion die in the mode of being perpendicular to flanges. Through the extrusion process that ultrasonic vibration is perpendicularly overlapped on a melt, the pressure action of pulse change acts on the melt, and the synergistic effect of ultrasonic vibration and uniform tensile stress is achieved. According to the extrusion method and die, the pressure fluctuation during extrusion of the plastic melt is reduced, the apparent viscosity of the melt is reduced, the compatibility of polymer blends is improved, the flow uniformity of materials is improved, and thus the combination property of a finished product is improved.
Description
Technical field
The present invention relates to a kind of polymer material extrusion shaping, more particularly to a kind of ultrasonic vibration and Uniform Tension stress
Synergistic polymer material extrusion product molding processing method and mouth mould.
Background technology
Extruded product accounts for more than half of plastic products total amount, all of extruded product be required for by extrusion neck ring mold Lai
Processing and forming, the shaping realizing macromolecular material becomes second nature.Extrusion neck ring mold is not only the important component part of extruding production line, simultaneously
Also material impact can be produced to the performance of extruded product.In most of extrusion neck ring mold, melt is mainly made by shear stress at present
With, or the local convergence/dissipate due to cross section of fluid channel and be subject to the tensile stress of transient changing to act on, shearing deformation effect is easily
Cause localized hyperthermia so that macromolecular material molecular chain rupture and reduce product macro-mechanical property and surface quality, transient changing
Tensile stress effect to easily cause extrusion unstable and make extruded product surface the defect such as uneven.
Tensile deformation domination and oscillatory shear stress Extrusion Molding processing method are to molding process and product
Important impact be can will produce, Chinese scholars and the common concern of related research institutes have been subject to.Theoretical in a large number and experiment is ground
Study carefully and show, the introducing of Vibrational force field has reduction apparent melt viscosity, reduces power consumption of polymer processing, improve dispersive property, improve plasticizing
The advantages of efficiency and plasticizing quality, product properties can be improved by affecting product condensed state structure simultaneously.Ultrasonic wave is frequency
The elastic mechanical vibration wave of more than 20KHz, parallel or perpendicular to overlapped high-frequency ultrasonic wave on flow direction, is contributing in polymerization
High vibration is produced, thus affecting Polymer moulding process and product properties inside thing melt.Draw at extruding dies
Entering ultrasonic vibration is to introduce in molding process that the oscillatory shear field of force is the simplest and one of direct method.In addition,
Ultrasonic wave as a kind of density of detection means on-line measurement melt, in injection nozzle and mould superposition ultrasonic wave in order to improve
The aspect such as the mobility of melt and pack effectiveness is applied；Chinese patent 201210052745.3,201310121160.7 is public
Open injection moulding method and the device that a kind of vibrational energy using ultrasonic wave generation is directly used in high polymer material plasticizing, this
All achieve certain effect a bit.
A.I.Isayev(Ultrasound assisted twin screw extrusion of polymer–
Nanocomposites containing carbon nanotubes, Polymer, 50, (2009) 250 260.) et al. pass through
Vltrasonic device is arranged on preparation PEI/CNTs composite on the slit shape mouth mould of double screw extruder.Test result indicate that：
By applying ultrasonic vibration, the rheological property such as storage modulus, loss modulus and complex viscosity of composite and stretching are strong
Degree and Young's modulus all improve to some extent, and its main cause is that ultrasonic vibration makes the CNTs aggregate in melt crush, and makes
Obtain CNTs and disperse more uniform in matrix PEI, thus improving the performance of material.But due in above-mentioned slit die melt with
Based on shearing laminar flow, interface updates slowly, reduces the chance that Composite Melt is contacted with ultrasonic wave, so that ultrasonic air
The scope of change effect diminishes, and constrains the impact effect of ultrasonic vibration, simultaneously because being subject to ul-trasonic irradiation and not receiving ultrasonic wave
The melt of effect is different at aspects such as rheological property, admixtures, have impact on the uniformity of melt, thus does not enable to extrude
In journey, both is effectively collaborative.
Existing ultrasonic-assisted polymerization thing composite extrusion mainly passes through ultrasonic activation and melt shear laminar flow
Longitudinal stack, achieve the synergy of ultrasonic vibration and shearing deformation in local space.But due to identical rate of deformation
Down cut Laminar flow mixing efficiency is low for effect, mixed effect is poor, have impact on the uniform of blend melt after ultrasonic vibration booster action
Property, constrain the raising further of ultrasonic activation action effect.
If boundary can be improved by active flow process is overlapped mutually with tensile deformation by ultrasonic assistant vibration
Face renewal rate, will effectively improve the sphere of action of ultrasonic activation, improve the uniformity of melt after ultrasonic vibration effect, thus
Improve ultrasonic vibration and the synergistic efficiency of tensile stress and effect.
Content of the invention
Present invention aims to the problems of extrusion neck ring mold based on shearing deformation, provide a kind of ultrasonic shake
Move and Uniform Tension stress synergistic extrusion molding processing method and mouth mould, effectively reduce polymer melt in process
Apparent viscosity, improve the compatibility of Polymer Blending System and mixing quality, improve material flow irregularity in runner,
So that the combination property of extruded product is improved.
By the mouth mould runner coupling ultrasonic vibration of invention Uniform Tension deformation domination in polymer material molding processing
In advantage, form ultrasonic vibration and Uniform Tension stress synergistic extrusion molding processing method, it will to macromolecule material
The performance of material extruded product improves the important impact of generation.
The purpose of the present invention is achieved through the following technical solutions：
A kind of ultrasonic vibration and the synergistic extrusion neck ring mold of Uniform Tension stress, including mouth mould, the first ultrasonic vibration dress
Put and the second ultrasonic vibration installation；First ultrasonic vibration installation and the second ultrasonic vibration installation are symmetricly set on mouthful mould both sides；The
One ultrasonic vibration installation and the second ultrasonic vibration installation are all mainly sent out by ultrasonic transformer, vibration-sensing rod, transducer, holding wire and ultrasonic wave
Raw device composition；Vibration-sensing rod one end is connected with the big end of ultrasonic transformer, and the other end of vibration-sensing rod and transducer are welded to connect, and transducer leads to
Cross holding wire to be connected with supersonic generator；It is arranged with through hole on mouth mould；First ultrasonic vibration installation and the second ultrasonic vibration
The small end of the ultrasonic transformer of device passes through through hole and mouth mould flow passage；Ultrasonic transformer stretches into the through hole of extrusion neck ring mold perpendicular to flange
Interior；The section of the runner of described mouth mould is circle, and its bus is parabolic type；Or the runner section of described mouth mould is square
Shape, its bus is hyperbolic-type.
For realizing the object of the invention further it is preferable that described luffing bar node outer end is provided with flange, flange passes through screw
It is fixed on mouthful mould；The outer end at the big end of ultrasonic transformer is provided with rebound；It is provided with lower seal between ultrasonic transformer and flange；Ultrasonic transformer with
It is provided with sealing ring between rebound.
Preferably, the gap of 0.3-0.7mm, ultrasonic transformer small end and receipts are left between described ultrasonic transformer and flange and rebound
Hold back and leave gap between the through hole on mouthful mould.
Preferably, described rebound and flange are connected by screw.
Preferably, described vibration-sensing rod has cooling water inlet and coolant outlet.
Preferably, described flange is screwed on mouth mould.
Preferably, described vibration-sensing rod one end and the big end of ultrasonic transformer are threaded connection.
Preferably, the ultrasonic vibration frequency of described supersonic generator is 20-40KHZ, and supersonic generator power is
300-1200W.
The ultrasonic vibration of described extrusion neck ring mold and the synergistic polymer material extrusion of Uniform Tension stress is applied to be molded
Processing method：Material, during flow-in-bore, is being acted on by ultrasonic vibration perpendicular to Flow of Goods and Materials direction, material is being produced
Periodically variable compression and expansion, promote the dispersion mixing of dispersion phase and polymer molecule in material multiphase co-mixing system
The disentanglement of chain；The constant convergence survey of acceleration made in mouth mould by material simultaneously, is uniformly drawn by consistent with flow direction
Stretch deformation effect, promote the renewal rate of polymer blend interface, increased material and contact with ultrasonic wave, enhance ultrasonic wave to material
The distributed rendering material of effect and co-mixing system distributed rendering, realize ultrasonic vibration synergistic with Uniform Tension stress
Extrusion.
The present invention is mainly by ultrasonic vibration installation and have the mouth mould of different cross section shape astringent runner and form.According to processing
The difference of article section shape, extrusion neck ring mold flow passage structure form is different.For the extrusion molding of bar product, processing is circular to cut
During Flour product, the section of extrusion neck ring mold runner is circle, runner be circle into and out of material mouth, its bus is parabolic type, tool
There is parabolic type astringent runner.During processing square-section product (sheet material, sheet material), the section of extrusion neck ring mold runner is rectangle, its
Bus is hyperbolic-type.Due to the change of mouth mould cross section of fluid channel area after melt entrance extrusion neck ring mold out from extruder,
Make the flowing velocity even variation of melt, thus melt is subject to the deformation effect of even variation；Because melt is made in mouth mould
Convergence survey, thus melt is mainly subjected to tensile stress, realizes the flow process of Uniform Tension deformation domination；Along melt
Flow direction arranges ultrasonic vibration installation, will vibrate the shaping of the stress longitudinal stack of change to product by polymer melt
Cheng Zhong, mutually synergistic macromolecule material product becomes second nature with the direct stress of even variation to realize ultrasonic vibration.This
Bright by screw, the mouth mould with parabola astringent runner is connected with extruder barrel flange, with screw by ultrasonic vibration installation
On the converging portion that ultrasonic vibration installation is vertically fixed on mouthful mould.
The present invention, compared with existing extruding forming method and device, has the advantage that：
1st, in extrusion of the present invention, acted on by ultrasonic vibration perpendicular to flow direction material, in ultrasonic vibration effect
Lower polymer molecular chain and heterogeneous system are subject to periodically variable compression and expansion, may advantageously facilitate dispersion phase in matrix
In dispersion mixing and strand disentanglement, simultaneously improve strand locomitivity, reduce viscosity；Meanwhile, along stream
On dynamic direction, the constant convergence survey of acceleration made in mouth mould by material, is made by the Uniform Tension deformation consistent with flow direction
With tensile deformation effect promotes the renewal rate of polymer blend interface, increased the chance that material is contacted with ultrasonic wave, enhances
The effect to material for the ultrasonic wave and the distributed rendering of co-mixing system, it is achieved thereby that ultrasonic vibration is worked in coordination with Uniform Tension stress make
Extrusion.Therefore, combined stress mutually collaborative for the tensile stress of ultrasonic vibration and even variation is acted on by the present invention
In the extrusion molding process of macromolecule material product, synergistic extrusion molding processing subtracts with Uniform Tension stress for ultrasonic vibration
Lack the pressure oscillation in extrusion for the plastic melt, reduced the apparent viscosity of melt, improve the compatible of blend polymer
Property and the flow uniformity improving material, so that the combination property of product is improved.
2nd, the present invention passes through to be superimposed ultrasonic vibration in melt flows direction, reduces the flow resistance of melt, and specific energy consumption drops
Low, it is advantageously implemented the green processing and forming of macromolecule material product.
3 present invention achieves oscillatory shear deformation and the synergistic shaping of Uniform Tension deformation become second nature process, equipment ties
Structure is simple, easy to operate.
4th, it is directed to polymer matrix composite wire rod, bar and articles of sheet material, by designing parabolic type or hyperbolic-type
The mouth mould of runner, realizes material and is acted on by uniform and stable direct stress in extrusion.
Brief description
Fig. 1 is ultrasonic vibration of the present invention and the synergistic extrusion neck ring mold of Uniform Tension stress (parabolic type convergence) structure
Schematic diagram；
Fig. 2 is ultrasonic vibration installation structural representation of the present invention；
Fig. 3 restrains the structural representation of mouth mould for parabolic type of the present invention；
Fig. 4 restrains the A-A face sectional view of mouth mould for parabolic type of the present invention；
Fig. 5 is parabolic type astringent runner structural representation of the present invention；
Fig. 6 is ultrasonic vibration of the present invention and the synergistic extrusion neck ring mold of Uniform Tension stress (hyperbolic-type convergence) structure
Schematic diagram；
Fig. 7 is the structural representation that this hyperbolic-type restrains mouth mould；
Fig. 8 restrains the A-A face sectional view of mouth mould for hyperbolic-type of the present invention；
Fig. 9 is hyperbolic-type astringent runner structural representation of the present invention；
The transmission electron microscope picture of the HDPE/MMT blend that Figure 10 conventional extrusion method prepares；
The transmission electron microscope picture of the HDPE/MMT blend that Figure 11 new method prepares.
Specific embodiment
For more fully understanding the present invention, the present invention is described further with reference to the accompanying drawings and examples, but this
Bright claimed scope is not limited to the scope of embodiment statement.
Embodiment 1
With reference to Fig. 1, Fig. 2, Fig. 3, a kind of ultrasonic vibration and the synergistic extrusion neck ring mold of Uniform Tension stress, including having
The mouth mould 1 of parabolic type astringent runner, the first ultrasonic vibration installation I and the second ultrasonic vibration installation II；First ultrasonic vibration dress
Put and be symmetricly set on mouthful mould both sides with the second ultrasonic vibration installation.For the extrusion molding of bar product, runner into and out of material mouth
It is circle, and its bus is parabola, converges to round exit by parabola.Parabola convergent current will be had by screw
The mouth mould 1 in road is connected with extruder barrel flange, is vertically fixed on ultrasonic vibration installation I and ultrasonic vibration installation II with screw
On the converging portion of mouth mould 1.First ultrasonic vibration installation I and the second ultrasonic vibration installation II all mainly by ultrasonic transformer 5, flange 6, under
Sealing ring 7, upper sealing ring 8, rebound 9, vibration-sensing rod 10, cooling water inlet 11, coolant outlet 12, transducer 13, holding wire
14 and supersonic generator 15 form；Vibration-sensing rod 10 one end is threaded connection with the big end of ultrasonic transformer 5, vibration-sensing rod 10 another
End is welded to connect with transducer 13, and transducer 13 is connected with supersonic generator 15 by holding wire 14, by setting ultrasonic wave
Parameter on generator 15 is thus be adjusted to vibration frequency and amplitude.It is arranged with through hole 4 on mouth mould 1；First ultrasonic shakes
The small end of the ultrasonic transformer 5 of dynamic device I and the second ultrasonic vibration installation II passes through through hole 4 and mouth mould 1 flow passage.
Ultrasonic transformer 5 is in the through hole 4 that flange 6 stretches into extrusion neck ring mold；Ultrasonic transformer 5 node outer end is provided with flange 6, flange
6 are fixed by screws on mouthful mould 1；The outer end at ultrasonic transformer 5 end greatly is provided with rebound 9；It is provided with down between ultrasonic transformer 5 and flange 6
Sealing ring 7；It is provided with sealing ring 8 between ultrasonic transformer 5 and rebound 9；0.3- is left between ultrasonic transformer 5 and flange 6 and rebound 9
The gap of 0.7mm, leaves gap between the through hole 4 on ultrasonic transformer 5 small end and convergence mouth mould.Preferably rebound 9 and flange 6 pass through
Mode connects for screw；Preferably cooling water inlet 11 and coolant outlet 12 are had on vibration-sensing rod 10, during work, logical cooling water prevents heat
It is delivered on transducer 13.
Installing and fixing method on mouth mould 1 for the first ultrasonic vibration installation I is as follows：First flange 6 is screwed in mouth
On mould 1, then by ultrasonic transformer 5 in the through hole 4 that flange 6 stretches into extrusion neck ring mold (Fig. 3), by lower seal 7 and upper sealing ring 8
Be enclosed within ultrasonic transformer 5 node and ultrasonic transformer 5 big end；Mounting flange 6 and rebound 9；It is connected by screw rebound 9 and method
Blue 6；Ultrasonic transformer 5 is made effectively to prevent material leakage while fixing.During installation, control and stay between ultrasonic transformer 5 and flange 6 and rebound 9
Have a gap of 0.5mm, and leave gap between the through hole 4 on ultrasonic transformer 5 small end and convergence mouth mould, thus avoid ultrasonic transformer 5 with
Metal directly contact, thus protecting ultrasonic transformer 5, and guarantees ultrasonic unit normal work.When extruder works, ultrasonic transformer 5 is little
Melt contacts in end and mouth mould runner 2, the ultrasonic vibration that transducer is produced is melted to polymer by vibration amplitude arm longitudinal stack
On body；Second ultrasonic vibration installation II is in the installing and fixing method on mouth mould 1 and the first ultrasonic vibration installation I on mouth mould 1
Installing and fixing method is the same.
In extrusion, acted on by ultrasonic vibration perpendicular to flow direction material, polymer under ultrasonic vibration effect
Strand and heterogeneous system are subject to periodically variable compression and expansion, may advantageously facilitate dispersion phase dispersion in the base
Mixing and the disentanglement of strand, improve the locomitivity of strand simultaneously, reduce viscosity；On streamwise, material is in mouth mould
Middle make the constant convergence survey of acceleration, by the Uniform Tension deformation effect consistent with flow direction, tensile deformation effect promotees
Enter the renewal rate of polymer blend interface, increased the chance that material is contacted with ultrasonic wave, enhance the work to material for the ultrasonic wave
With the distributed rendering with co-mixing system, it is achieved thereby that ultrasonic vibration and the synergistic extrusion of Uniform Tension stress.
Present invention can apply to polymer modification extrusion, such as polymer/inorganic filler blending extrusion, polymer/polymer
Binary blending extrusion or tertiary blending extrusion or poly-blended extrusion.
With reference to Fig. 3, Fig. 4, Fig. 5, mouth mould runner is parabolic type, and extruded product has circular cross section.With conventional straight flow
Unlike the mould of road junction, melt based on shear flow, is mainly acted on by shearing deformation, and melt flows through in straight mouth mould
Have astringent runner mouth mould when, due to mouth mould parabolically type convergence, because circulation area reduce and make melt be accelerated, melt
Body is stretched deformation effect, improves the mixing efficiency in extrusion and mixed effect, improves quality of item；Melt with
Unlike in tapered runner, when melt flows in bus is for parabolical astringent runner, its acceleration keeps constant, melt
Velocity attitude substantially parallel with its acceleration direction, melt be subject to Uniform Tension stress；By ultrasonic vibration longitudinal stack
To in the extrusion of melt, melt is made to be subject to the pressure of pulsatile change to act on, thus the rheological behaviour generation to melt is important
Impact.Uniform Tension deformation effect one side promotes the renewal of melt interface layer, increased the machine that melt is contacted with ultrasonic wave
Meeting, improves melt temperature, uniformity that pressure, group are graded；On the other hand because melt is acted on by uniform tensile stress,
Avoid the material causing because the temperature caused by shear action and nonuniform stretching deformation effect, pressure distribution are uneven etc.
The defects such as degraded, thus realize ultrasonic vibration and Uniform Tension flow field synergistic circular cross-section product (bar, wire rod etc.)
Extrusion molding processing.
In order to verify the effect of the present invention, carry out following Experimental comparison：Using identical plasticizing system, screw speed
60rpm, die temperature is 200 DEG C, by the blend of die extrusion HDPE/MMT (montmorillonite) shown in embodiment 1, wherein MMT
Mass fraction is 5%.Contrast test is carried out using Conventional cone mouth mould and the present embodiment new mouth mould superposition ultrasonic wave, mouth mould enters
Unanimously, ultrasonic vibration frequency is 20KHz for mouth and outlet, mouth mould length dimension, and ultrasonic power changes in 500-800w.Commonsense method
Extrusion and ultrasonic vibration work in coordination with Uniform Tension stress extrusion preparation HDPE/MMT blend utilize transmission electron microscope (TEM,
JEOL1011) to montmorillonite, the deployment conditions in HDPE polymeric matrix characterize, transmission electron microscope photo such as Figure 10, Figure 11
Shown.Contrast Figure 10 and Figure 11 can be seen that MMT in blend prepared by new method extrusion and be uniformly dispersed in matrix HDPE,
MMT interlamellar spacing increases, and illustrates that the stripping that Uniform Tension stress is conducive to MMT is worked in coordination with ultrasonic vibration, thus improve blending
The combination property of thing HDPE/MMT.Dispersing uniformity improves and the increase of MMT interlamellar spacing is mainly attributed to following two aspects：Hanging down
Straight on Flow of Goods and Materials direction, material under ultrasonic vibration effect by periodic compression with expand, periodically compression with swollen
Swollen raising promotes the disentanglement of the dispersion mixing of dispersion phase and substrate molecule chain in heterogeneous system；Streamwise material is in mouth
Make the constant convergence survey of acceleration, by the Uniform Tension deformation effect consistent with flow direction, tensile deformation acts in mould
Promote the interface renewal rate of heterogeneous system, increased the chance that blend contacted with ultrasonic wave and the distribution of heterogeneous system mixes
Close efficiency, enhance the effect to material for the ultrasonic vibration, it is achieved thereby that ultrasonic vibration is synergistic with Uniform Tension stress
Extrusion.
Embodiment 2
For its mouthful of mould runner gateway of product of rectangle, rectangle is for section, width keeps constant, thickness side
It is gradually reduced to products thickness to along bus for hyperbola.With reference to Fig. 2, Fig. 3, Fig. 6, Fig. 7, a kind of ultrasonic vibration and Uniform Tension
The synergistic extrusion neck ring mold of stress, including mouth mould 1, the first ultrasonic vibration installation I and with parabolic type astringent runner
Two ultrasonic vibration installation II.By screw, the mouth mould 1 with hyperbola astringent runner is connected with extruder barrel flange, uses spiral shell
Ultrasonic vibration installation I and ultrasonic vibration installation II is vertically fixed on the converging portion of mouthful mould 1 nail.
First ultrasonic vibration installation I and the second ultrasonic vibration installation II all mainly by ultrasonic transformer 5, flange 6, lower seal 7,
Upper sealing ring 8, rebound 9, vibration-sensing rod 10, cooling water inlet 11, coolant outlet 12, transducer 13, holding wire 14 and ultrasonic
Wave producer 15 forms；Vibration-sensing rod 10 one end is threaded connection with the big end of ultrasonic transformer 5, the other end of vibration-sensing rod 10 and transducing
Device 13 is welded to connect, and transducer 13 is connected with supersonic generator 15 by holding wire 14, by setting supersonic generator 15
On parameter thus being adjusted to vibration frequency and amplitude.It is arranged with through hole 4 on mouth mould 1；First ultrasonic vibration installation I and
The small end of the ultrasonic transformer 5 of the second ultrasonic vibration installation II passes through through hole 4 and mouth mould 1 flow passage；
Ultrasonic transformer 5 is in the through hole 4 that flange 6 stretches into extrusion neck ring mold；Ultrasonic transformer 5 node outer end is provided with flange 6, flange
6 are fixed by screws on mouthful mould 1；The outer end at ultrasonic transformer 5 end greatly is provided with rebound 9；It is provided with down between ultrasonic transformer 5 and flange 6
Sealing ring 7；It is provided with sealing ring 8 between ultrasonic transformer 5 and rebound 9；0.3- is left between ultrasonic transformer 5 and flange 6 and rebound 9
The gap of 0.7mm, leaves gap between the through hole 4 on ultrasonic transformer 5 small end and convergence mouth mould.Preferably rebound 9 and flange 6 pass through
Mode connects for screw；Preferably cooling water inlet 11 and coolant outlet 12 are had on vibration-sensing rod 10, during work, logical cooling water prevents heat
It is delivered on transducer 13.Fixing means on mouth mould I for the ultrasonic vibration installation I and ultrasonic vibration installation II and embodiment 1 phase
Similar.
With reference to Fig. 7, Fig. 8, Fig. 9, when described mouth mould runner 2 is hyperbolic-type, it is rectangle into and out of material mouth.Work as melt
When flowing through the mouth mould with astringent runner, streamwise thickness tapers into, thus melt is accelerated.Because mouth mould is in hyperbolic
Line style restrains, and the constant airspeed that cross-sectional area reduces causes the acceleration of melt constant, and melt is subject to the stretching shape of even variation
Change acts on, and the flowing of melt is mainly arranged by tensile deformation；By by ultrasonic vibration longitudinal stack in the extrusion of melt,
Melt is made to be subject to the pressure of pulsatile change to act on, thus realizing ultrasonic vibration and the synergistic board product of Uniform Tension stress
Extrusion molding is processed.
Claims (9)
1. a kind of ultrasonic vibration with Uniform Tension stress synergistic extrusion neck ring mold it is characterised in that include mouth mould, the first surpass
Acoustic vibration device and the second ultrasonic vibration installation；First ultrasonic vibration installation and the second ultrasonic vibration installation are symmetricly set on a mouthful mould
Both sides；First ultrasonic vibration installation and the second ultrasonic vibration installation all mainly by ultrasonic transformer, vibration-sensing rod, transducer, holding wire and
Supersonic generator forms；Vibration-sensing rod one end is connected with the big end of ultrasonic transformer, and the other end of vibration-sensing rod and transducer are welded to connect,
Transducer is connected with supersonic generator by holding wire；It is arranged with through hole on mouth mould；First ultrasonic vibration installation and second
The small end of the ultrasonic transformer of ultrasonic vibration installation passes through through hole and mouth mould flow passage；Ultrasonic transformer stretches into extrusion neck ring mold perpendicular to flange
Through hole in；The section of the runner of described mouth mould is circle, and its bus is parabolic type；Or the runner section of described mouth mould
For rectangle, its bus is hyperbolic-type.
2. ultrasonic vibration according to claim 1 and the synergistic extrusion neck ring mold of Uniform Tension stress it is characterised in that
Described luffing bar node outer end is provided with flange, and flange is fixed by screws on mouthful mould；The outer end at the big end of ultrasonic transformer is provided with transition
Plate；It is provided with lower seal between ultrasonic transformer and flange；It is provided with sealing ring between ultrasonic transformer and rebound.
3. ultrasonic vibration according to claim 2 and the synergistic extrusion neck ring mold of Uniform Tension stress it is characterised in that
The gap of 0.3-0.7mm, ultrasonic transformer small end and the through hole restrained on mouth mould is left between described ultrasonic transformer and flange and rebound
Between leave gap.
4. ultrasonic vibration according to claim 2 and the synergistic extrusion neck ring mold of Uniform Tension stress it is characterised in that
Described rebound and flange are connected by screw.
5. ultrasonic vibration according to claim 1 and the synergistic extrusion neck ring mold of Uniform Tension stress it is characterised in that
Cooling water inlet and coolant outlet are had on described vibration-sensing rod.
6. ultrasonic vibration according to claim 2 and the synergistic extrusion neck ring mold of Uniform Tension stress it is characterised in that
Described flange is screwed on mouth mould.
7. ultrasonic vibration according to claim 1 and the synergistic extrusion neck ring mold of Uniform Tension stress it is characterised in that
Described vibration-sensing rod one end is threaded connection with the big end of ultrasonic transformer.
8. ultrasonic vibration according to claim 1 and the synergistic extrusion neck ring mold of Uniform Tension stress it is characterised in that
The ultrasonic vibration frequency of described supersonic generator is 20-40KHZ, and supersonic generator power is 300-1200W.
9. the ultrasonic vibration of extrusion neck ring mold and the synergistic high score of Uniform Tension stress described in application any one of claim 1-8
Sub- material extrusion molding processing method it is characterised in that：Material, during flow-in-bore, is being subject to perpendicular to Flow of Goods and Materials direction
To ultrasonic vibration effect, periodically variable compression and expansion are produced to material, promote to divide in material multiphase co-mixing system
The dispersion mixing of dephasing and the disentanglement of polymer molecular chain；The constant convergence survey of acceleration made in mouth mould by material simultaneously,
It is subject to the Uniform Tension deformation effect consistent with flow direction, promotes the renewal rate of polymer blend interface, increased material and surpass
Acoustic wave touch, enhances the distributed rendering to the effect of material and the distributed rendering material of co-mixing system for the ultrasonic wave, realizes ultrasonic
Vibration and the synergistic extrusion of Uniform Tension stress.
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| CN110202772A (en) * | 2019-07-19 | 2019-09-06 | 四川大学 | Hydraulic vibration disentanglement device |
| CN110328843A (en) * | 2019-06-25 | 2019-10-15 | 同济大学 | The composite material 3D printing device of ultrasonic assistant soakage |
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| CN108627572A (en) * | 2018-05-10 | 2018-10-09 | 江苏大学 | Ultrasonic breaking test apparatus and method |
| CN110000947A (en) * | 2019-03-13 | 2019-07-12 | 华南理工大学 | A kind of device and method that effect being blended for on-line checking eccentric rotor extruder |
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| CN110328843A (en) * | 2019-06-25 | 2019-10-15 | 同济大学 | The composite material 3D printing device of ultrasonic assistant soakage |
| CN110328843B (en) * | 2019-06-25 | 2021-06-18 | 同济大学 | Ultrasonic-assisted impregnated composite material 3D printing device |
| CN110202772A (en) * | 2019-07-19 | 2019-09-06 | 四川大学 | Hydraulic vibration disentanglement device |
| CN110202772B (en) * | 2019-07-19 | 2024-04-26 | 四川大学 | Hydraulic vibration disentanglement device |
| CN110455929A (en) * | 2019-07-31 | 2019-11-15 | 江苏大学 | A kind of high-frequency vibration breaking test device and method of off-resonance form |
| CN110746619A (en) * | 2019-10-31 | 2020-02-04 | 四川大学 | Ultrasonic vibration rotary shearing and disentangling device |
| CN110746619B (en) * | 2019-10-31 | 2020-07-31 | 四川大学 | Ultrasonic vibration rotary shearing and disentangling device |
| CN113681852A (en) * | 2021-07-23 | 2021-11-23 | 华南理工大学 | Production equipment and method for LCP film under action of space electric field |
| CN115339099A (en) * | 2022-08-23 | 2022-11-15 | 西安交通大学 | High-viscosity material extrusion device based on double ultrasonic vibrator resonance |
| CN115972533A (en) * | 2022-12-19 | 2023-04-18 | 四川大学 | Polymer melt composite vibration extrusion molding device |
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