CN1321788C - Multi-screwrod vibrating field induction plastic milling method and apparatus - Google Patents

Multi-screwrod vibrating field induction plastic milling method and apparatus Download PDF

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Publication number
CN1321788C
CN1321788C CNB2005100326257A CN200510032625A CN1321788C CN 1321788 C CN1321788 C CN 1321788C CN B2005100326257 A CNB2005100326257 A CN B2005100326257A CN 200510032625 A CN200510032625 A CN 200510032625A CN 1321788 C CN1321788 C CN 1321788C
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China
Prior art keywords
screw
screw rod
line
driving screw
sub
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Expired - Fee Related
Application number
CNB2005100326257A
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Chinese (zh)
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CN1644341A (en
Inventor
瞿金平
何和智
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South China University of Technology SCUT
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South China University of Technology SCUT
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Priority to CNB2005100326257A priority Critical patent/CN1321788C/en
Publication of CN1644341A publication Critical patent/CN1644341A/en
Application granted granted Critical
Publication of CN1321788C publication Critical patent/CN1321788C/en
Expired - Fee Related legal-status Critical Current
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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
    • B29C48/535—Screws with thread pitch varying along the longitudinal axis
    • 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
    • B29C48/405—Intermeshing co-rotating screws
    • 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
    • B29C48/41—Intermeshing counter-rotating screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
    • B29C48/42—Non-identical or non-mirrored screws
    • 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
    • B29C48/45—Axially movable 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 relates to a method of plasticization, pugging and extrusion induced by multi-screw rod vibration force fields and equipment thereof. In the method, vibration force is superposed on a central main screw rod which axially pulsates under the action of the vibration force so that engaged gaps among axial teeth of the main screw rod and auxiliary screw rods are periodically changed and materials are forcedly plasticized and pugged because the materials are simultaneously under complicated shearing action and periodical pulsating extrusion abrasive action in the conveying process. The equipment is mainly composed of an excitation device, a motor, a feeding device, a multi-screw rod system, a hopper and a machine head, wherein the multi-screw rod system is composed of a central main screw rod and auxiliary screw rods symmetrically arranged around the central main screw rod; the motor drives the multi-screw rod system; a power transmission shaft of the central main screw rod penetrates through a hollow shaft of the drive motor and passes through a linear rolling spline connected with the rear end of the hollow shaft of the drive motor and rotates together with the hollow shaft; the excitation device is arranged at the end of the power transmission shaft of the central main screw rod. The present invention has the advantages of compact structure of the complete machine, low energy consumption and high adaptability to the materials.

Description

Polymer and composite multi-screw rod plasticizing mixing extrusion method and equipment
Technical field
The present invention relates to the forming polymer method and apparatus, specifically is a kind of polymer and composite multi-screw rod plasticizing compounding process and equipment.
Background technology
The spiro rod plasticizing mixing extruder that existing Polymer Processing is used has single screw rod, twin-screw and multi-screw extruder.Three-screw extruder is the multi-screw extruder that is most widely used.Patent CN97202356.9 discloses a kind of three screw rod plastic extruders.Three screw rods of this extruder " one " word arrangement, a thick shape driving screw is connected with main shaft, and two thin shape sub-screws are listed in driving screw both sides and its engagement respectively, reverse rotation between the major and minor screw rod, the thread direction is opposite.Patent CN01207223.0 has announced that a kind of screw rod line of centres is down Chinese character pin-shaped three-screw extruder, and the equilateral triangle of three screw rods of full engagement is arranged and constituted distinctive three region of engagements.These two kinds of three-screw extruders are continued to use the mixing principle of extruding of the coefficient stable state plasticizing of external heat source and mechanical shearing always, are merely to utilize the method that increases the region of engagement to improve the material melting effect.Along with the continuous development of polymer modification material, need mixing, the dispersion effect of material in the more effective raising plastic processing, and traditional design philosophy that improves the polymer melting effect with increase screw slenderness ratio and increase region of engagement there is certain limitation.
Summary of the invention
The objective of the invention is to a kind of polymer and composite multi-screw rod plasticizing compounding process and equipment, from the limitation of the above-mentioned design philosophy of plasticizing mixing extruder reason breakthrough, in the polymer masses course of conveying, introduce the vibration field of force to strengthen the plasticizing melting effect of material.
The present invention also aims to provide the equipment of described method use.
Polymer of the present invention and composite multi-screw rod plasticizing compounding process thereof comprise: material enters barrel by feeding device, plasticizing is mixing in multi-screw line, be subjected to periodically pulsing crush and grind and shearing, and carry to heading and to extrude, be characterized in that multi-screw line rotates in a circumferential direction under motor-driven, utilize exciting device the axial-periodic vibration to be provided for central driving screw, make it when rotating in a circumferential direction, make the axial cyclic sinuous pulsation, at the sub-screw of driving screw periphery symmetric arrangement, form the region of engagement between the major-minor screw rod with the parallel engagement of its equal diameter.
The mixing extrusion equipment of multiscrew vibration field of force induced plastification of the present invention mainly is made of exciting device, motor, feeding device, multi-screw line, barrel and head, multi-screw line is made of the sub-screw of central driving screw and peripheral symmetric arrangement thereof, motor-driven screw rod system, the power transmission shaft of central authorities' driving screw passes the drive motors hollow shaft, and by connecting the straight-line rolling spline of rotation with drive motors hollow shaft rearward end, exciting device is installed in the end of the power transmission shaft of central driving screw.
The sub-screw of central authorities' driving screw and peripheral symmetric arrangement thereof is formed multi-screw line.Exciting device carries out exciting to central driving screw, realizes that central driving screw can make axial pulse, and the result of axial pulse makes that the back lash is cyclically-varying between the axial tooth of central driving screw and sub-screw.
Described cyclically-varying is that the displacement of the axial vibration of central driving screw is a sinusoidal variations, and promptly the displacement equation is: S A=S 0Sin ω 0T, S 0Be screw rod amplitude, ω 0Be angle of throw frequency exciting.
Described sub-screw and central driving screw can mesh rotation in the same way also can incorgruous engagement rotation.
The diameter of described sub-screw can be equal to or less than the diameter of central driving screw.
All screw rods can be the parallel engagements of equal diameter, also can be the non-parallel cone angle engagements in awl footpath.
The operation principle of the inventive method and equipment thereof is as follows: driving screw and each root sub-screw constitute a region of engagement, the quite a pair of twin-screw engagement in each region of engagement.The above-mentioned vibration field of force influences the mechanism difference at the diverse location of screw rod to what mix.Under Vibration Force Field, the indoor fluid particle open loop spiral streamline of C type takes place folding in the process that advances to head, causes the non-linear stretching in fluid infinitesimal interface, produces chaotic mixing, has improved the distribution mixed effect of system.Under the oscillator field effect, back lash cyclically-varying in time between driving screw, sub-screw axial tooth, produce and disperse to mix: in the calendering gap, vibration induced interface reorientation, the material that enters through the quantifying feed system is drawn in the calendering gap by the motion between two screw rods and is dynamically rolled mixing, and material is by plasticizing and mixing fast; In spiral shell rib side clearance, vibration makes flow field oscillation cycle between elongational flow and compression flow move, and the common existence of the stretching field of force and shearing force field makes the interior mixed effect of spiral shell rib side clearance significantly improve, and vibration also can cause the interior flow of side clearance to increase.Driving screw is made axial pulse under the vibration force effect, make back lash cyclically-varying between the axial tooth between driving screw and sub-screw, and material is produced compulsory crush and grind effect.Under vibrational state, the shear rate of transient change and pressure will produce dissipation heat energy, make the fusion and the mixing reinforcement of material.
The present invention compared with prior art has following advantage:
(1) the plasticizing melting effect is good, extruded product quality height.The present invention adopts middle screw rod to introduce vibration, the plasticizing of vibration force field intensity material and mixing, driving screw and two or many sub-screws constitute two or more kneadings district, have improved melting effect, exhaust effect strengthens simultaneously, and the extruded product quality significantly improves.
(2) the present invention has multiple combined optional to select at screw rod number, arrangement mode, the engagement rotation mode of multi-screw line, and the wide application range of material of processing can be selected according to actual needs.
Description of drawings
Fig. 1 is the configuration diagram of present device;
Fig. 2 is that the screw rod among Fig. 1 is homodromal structural representation;
Fig. 3 is that the screw rod among Fig. 1 is the schematic diagram of incorgruous rotation three screw engages;
Fig. 4 is that the screw rod among Fig. 1 is the structural representation of isometrical word order;
Fig. 5 is that the screw rod among Fig. 1 is the structural representation of not isometrical three screw rod word orders;
Fig. 6 is that the screw rod among Fig. 1 is the non-word order schematic diagrames of isometrical three screw rods;
Fig. 7 is the non-word order schematic diagram of screw rod not isometrical three screw rods of system among Fig. 1;
Fig. 8 is that the screw rod among Fig. 1 is that isometrical five screw rods are arranged schematic diagram;
Fig. 9 is that not isometrical five screw rods of screw rod system among Fig. 1 are arranged schematic diagram.
The specific embodiment
Fig. 1 is the equipment schematic diagram that the method for the invention is used.This equipment is made of exciting device 1, motor 2, feeding device 3, multi-screw line 4, barrel 5 and head 6.Multi-screw line is made up of the sub-screw of central driving screw and peripheral symmetric arrangement thereof.Screw rod system is by motor-driven, and the power transmission shaft of central driving screw passes the drive motors hollow shaft, and can make axial pulse when by the straight-line rolling spline that connects rotation with drive motors hollow shaft rearward end it being rotated.The axial pulse of central authorities' driving screw is by custom-designed exciting device the power transmission shaft of central driving screw to be carried out exciting.
Exciting device 1 provides vibration force for driving screw 7, and this vibration force can be provided by multiple modes such as machinery, electromagnetism, hydraulic pressure.
Multi-screw line 4 is made up of the driving screw among Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 97 and two or two above sub-screws 8.Sub-screw is in driving screw periphery symmetric arrangement, and meshes with driving screw.Driving screw, sub-screw mesh rotation as shown in Figure 2 in the same way, and incorgruous engagement rotation as shown in Figure 3.Sub-screw equal diameters more than two or two, sub-screw diameter and driving screw equal diameters such as Fig. 4, Fig. 6, shown in Figure 8 are less than driving screw diameter such as Fig. 5, Fig. 7, shown in Figure 9.All screw rods are the parallel engagements of equal diameter in the multi-screw line, or the non-parallel cone angle engagement in awl footpath.The combination of screw rod in the multi-screw line, arrangement, engagement rotation mode can be selected according to material variety, processing request.
The course of work of equipment is described below:
Multi-screw line 4 rotates in a circumferential direction under motor 2 drives, and exciting device 1 provides axial-periodic vibration for driving screw 7, makes driving screw 7 do the axial cyclic pulsation when rotating in a circumferential direction.Material in feeding device 3 enters machine barrel 5, enter behind the machine barrel 5 material multi-screw line 4 rotatablely move and the axial pulse of driving screw 7 under, mixing mixing, and carry to head 6 directions.Cyclically-varying is done in the back lash between the axial tooth of driving screw 7 and sub-screw 8 under Vibration Force Field, and material is subjected to the periodically pulsing crush and grind in the space of size variation, and material is subjected to complicated shear action in transport process simultaneously.Material is extruded from head 6 behind the abundant mixed milling of process under the multiple active force of these complexity.

Claims (3)

1, a kind of polymer and composite multi-screw rod plasticizing compounding process thereof, wherein material enters barrel by feeding device, plasticizing is mixing in multi-screw line, be subjected to periodically pulsing crush and grind and shearing, and carry to heading and to extrude, it is characterized in that multi-screw line rotates in a circumferential direction under motor-driven, utilize exciting device the axial-periodic vibration to be provided for central driving screw, make it when rotating in a circumferential direction, make the axial cyclic sinuous pulsation, at the sub-screw of driving screw periphery symmetric arrangement, form the region of engagement between the major-minor screw rod with the parallel engagement of its equal diameter.
2, a kind of equipment of realizing the described method of claim 1, it is characterized in that mainly constituting by exciting device, motor, feeding device, multi-screw line, barrel and head, multi-screw line is made of the sub-screw of central driving screw and peripheral symmetric arrangement thereof, motor-driven screw rod system, the power transmission shaft of central authorities' driving screw passes the drive motors hollow shaft, and by connecting the straight-line rolling spline of rotation with drive motors hollow shaft rearward end, exciting device is installed in the end of the power transmission shaft of central driving screw.
3, equipment according to claim 2 is characterized in that sub-screw and central driving screw mesh rotation or incorgruous engagement rotation in the same way in the multi-screw line.
CNB2005100326257A 2005-01-13 2005-01-13 Multi-screwrod vibrating field induction plastic milling method and apparatus Expired - Fee Related CN1321788C (en)

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Application Number Priority Date Filing Date Title
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CN1321788C true CN1321788C (en) 2007-06-20

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AT503371B1 (en) * 2005-11-25 2010-11-15 Schulz Helmuth Ing DEVICE AND METHOD FOR PROCESSING MATERIAL BY MIXTURE AND / OR BZW. OR PLASTIFICATION OR AGGLOMERATION
CN100436105C (en) * 2006-04-18 2008-11-26 天津市石化通用机械研究所 Vibration chain type feeding screw rod kneading extruder
CN102019650A (en) * 2009-09-21 2011-04-20 青岛科技大学 Electromagnetic dynamic hydraulic transmission banburying device and mixing method thereof
CN101941281A (en) * 2010-07-09 2011-01-12 华南理工大学 Extruding system and driving system integrated vane plasticating extruder
CN102172486B (en) * 2011-03-01 2013-11-06 苏州兆达特纤科技有限公司 Multi-screw mixer and application thereof in continuous polymerization reaction of poly-p-phenylene terephthamide
CN102189663A (en) * 2011-04-06 2011-09-21 北京化工大学 Differential three-screw extruder with triangularly-arranged screws
CN102189664A (en) * 2011-04-06 2011-09-21 北京化工大学 Differential extruder with three straightly-arranged screws
CN102228817A (en) * 2011-06-10 2011-11-02 北京化工大学 Conical tri-rotor continuous mixing unit with rotors in linear arrangement
CN102225316A (en) * 2011-06-10 2011-10-26 北京化工大学 Three-rotor continuous mixing unit with rotors arranged triangularly
CN105751475A (en) * 2016-04-25 2016-07-13 顺德职业技术学院 Hollow single screw extruder with vibrating mandrel
CN105856530B (en) * 2016-04-29 2018-10-09 华南理工大学 Strengthen plasticizing mixing extrusion method and equipment in the three screw vibration field of force of balanced type
CN105815361B (en) * 2016-06-13 2019-02-01 江阴市星亚食品机械有限公司 It is horizontal to give filling machine
CN109159314A (en) * 2018-10-19 2019-01-08 青岛科技大学 A kind of triple-spool mixer
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

Citations (4)

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Publication number Priority date Publication date Assignee Title
SU409884A1 (en) * 1971-10-12 1974-01-05
CN2300497Y (en) * 1997-03-07 1998-12-16 林秀真 Improved structure for three-screw extrusion machine
CN2471522Y (en) * 2001-03-01 2002-01-16 北京化工大学 Three screw rod extruder for polymer
US6521155B1 (en) * 1997-09-10 2003-02-18 Horst Wunsch Chimney-pipe and manufacture of same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU409884A1 (en) * 1971-10-12 1974-01-05
CN2300497Y (en) * 1997-03-07 1998-12-16 林秀真 Improved structure for three-screw extrusion machine
US6521155B1 (en) * 1997-09-10 2003-02-18 Horst Wunsch Chimney-pipe and manufacture of same
CN2471522Y (en) * 2001-03-01 2002-01-16 北京化工大学 Three screw rod extruder for polymer

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