CN118082153A - Single screw extrusion device and self-meshing extrusion equipment - Google Patents
Single screw extrusion device and self-meshing extrusion equipment Download PDFInfo
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- CN118082153A CN118082153A CN202410236344.6A CN202410236344A CN118082153A CN 118082153 A CN118082153 A CN 118082153A CN 202410236344 A CN202410236344 A CN 202410236344A CN 118082153 A CN118082153 A CN 118082153A
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- 238000001125 extrusion Methods 0.000 title claims abstract description 54
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 abstract description 45
- 238000002156 mixing Methods 0.000 abstract description 12
- 238000002844 melting Methods 0.000 abstract description 8
- 230000008018 melting Effects 0.000 abstract description 8
- 230000007246 mechanism Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
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- 229920000891 common polymer Polymers 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010094 polymer processing Methods 0.000 description 1
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- 230000010349 pulsation Effects 0.000 description 1
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Abstract
The invention discloses a single-screw extrusion device and self-meshing extrusion equipment, wherein the single-screw extrusion device comprises a screw and a machine barrel, the screw is arranged in the machine barrel in a penetrating way, the screw is meshed with the machine barrel, and molded lines of the machine barrel and the screw are formed by alternately connecting epicycloids and hypocycloids; wherein, the epicycloid of screw rod is N 1N2, and the hypocycloid of screw rod is N 2N3, and the epicycloid of barrel is M 1M2, and the hypocycloid of barrel is M 2M3, and the head number of screw rod is Q, and the head number of barrel is Q+1, and head number Q is the positive integer of 1 or more, satisfies: r 1＝(r2+r3)*Q、r1"＝(r2"+r3 ") (q+1); the volume enclosed by the screw and the machine barrel is periodically changed, so that the materials are extruded and stretched in the screw groove continuously, and the melting, plasticizing and mixing of the materials are accelerated.
Description
Technical Field
The invention relates to the technical field of extrusion molding, in particular to a single-screw extrusion device and self-meshing extrusion equipment.
Background
Injection molding machine and extruder are common polymer processing equipment to promote the motion of melting material through the screw rod to extrude the material, current injection molding machine and extruder mainly drive the material motion through single screw rod, and its simple structure, processing cost is low, but single screw rod only mixes for the laminar flow, and mixing efficiency is limited, has prolonged production cycle, has increased energy consumption and cost.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the invention provides a single screw extrusion device which can accelerate melting, plasticizing and mixing of materials, shorten the production period, save energy and reduce consumption.
The invention also provides self-meshing extrusion equipment with the single-screw extrusion device.
According to a first aspect of an embodiment of the present invention, there is provided a single screw extrusion device comprising a screw and a barrel, the screw being threaded in the barrel and the screw being in engagement with the barrel, the profile of the barrel and the screw being composed of alternating connections of epicycloids and hypocycloids; establishing a plane rectangular coordinate system with an origin o, a horizontal axis x and a vertical axis y, and setting a first circle, a second circle, a third circle, a fourth circle, a fifth circle and a sixth circle, wherein the circle center of the first circle and the circle center of the fourth circle are both arranged at the origin o, the epicycloidal curve of the screw is a track of a point on the second circle when the second circle does slip-free tangential rolling motion outside the first circle, and the hypocycloid of the screw is a track of a point on the third circle when the third circle does slip-free tangential rolling motion inside the first circle; the epicycloid of the machine barrel is the locus of a point on the fifth circle when the fifth circle does slip-free tangential rolling motion outside the fourth circle, and the hypocycloid of the machine barrel is the locus of a point on the sixth circle when the sixth circle does slip-free tangential rolling motion inside the fourth circle; wherein the epicycloidal line of the screw is N 1N2, the hypocycloid of the screw is N 2N3, the included angle between the connecting line of the point on the curve N 1N2 and the origin o and the x axis is theta 1, the included angle between the connecting line of the point on the curve N 2N3 and the origin o and the x axis is theta 2, the epicycloidal line of the machine barrel is M 1M2, the hypocycloid of the machine barrel is M 2M3, the included angle between the connecting line of the point on the curve M 1M2 and the origin o and the x axis is theta 1', the included angle between the connecting line of the point on the curve M 2M3 and the origin o and the x axis is theta 2 ", the radiuses of the first circle, the second circle, the third circle, the fourth circle, the fifth circle and the sixth circle are r 1、r2、r3、r1″、r2 'and r 3' in sequence, the head number of the screw is Q, the head number of the machine barrel is Q+1, and the head number Q is a positive integer greater than or equal to 1, so that the following conditions are satisfied: r 1＝(r2+r3)*Q、r1″＝(r2″+r3 ") x (q+1);
the equation for curve N 1N2 is:
Wherein 0 < θ 1＜2*π*r2/(Q*(r2+r3));
The equation for curve N 2N3 is:
Wherein 0 < θ 2＜-2*π*r3/(Q*(r2+r3));
The equation of curve M 1M2 is
Wherein 0 < θ 1″＜2*π*r2″/((Q+1)*(r2″+r3 ");
The equation for curve M 2M3 is:
wherein 0 < θ 2″＜-2*π*r3″/((Q+1)*(r2″+r3 ").
The single screw extrusion device provided by the embodiment of the invention has at least the following beneficial effects: the screw rod is arranged in the machine barrel in a penetrating way, the molded lines of the screw rod and the machine barrel are formed by epicycloids and hypocycloids alternately, the epicycloids of the screw rod are tracks of one point on the second circle when the second circle makes slip-free tangential rolling on the outer side of the first circle, and the hypocycloids of the screw rod are tracks of one point on the third circle when the third circle makes slip-free tangential rolling on the inner side of the first circle; the epicycloid of the machine barrel is the locus of a point on the fifth circle when the fifth circle makes slip-free tangential rolling movement outside the fourth circle, the hypocycloid of the machine barrel is the locus of a point on the sixth circle when the sixth circle makes slip-free tangential rolling movement inside the fourth circle, the radiuses of the first circle, the second circle, the third circle, the fourth circle, the fifth circle and the sixth circle are r 1、r2、r3、r1″、r2 'and r 3' in sequence, the head number of the screw is Q, the head number of the machine barrel is Q+1, and the head number Q is a positive integer greater than or equal to 1, so that the following conditions are satisfied: r 1＝(r2+r3)*Q、r1″＝(r2″+r3 ") and (q+1), self-cleaning of the screw and barrel is achieved by defining curves N 1N2, N 2N3, M 1M2 and M 2M3, so that the screw and barrel can remain engaged. And along with the rotation of the screw rod, the volume enclosed by the screw rod and the machine barrel is periodically changed, so that the materials are continuously extruded and stretched in the screw groove, and the melting plasticization and mixing of the materials are accelerated, thereby shortening the production period and saving the energy consumption.
According to some embodiments of the invention, the number of heads of the screw is 2 and the number of heads of the barrel is 3.
According to some embodiments of the invention, the number of heads of the screw is 3 and the number of heads of the barrel is 4.
According to some embodiments of the invention, the screw and the barrel are tapered in shape.
According to a second aspect of embodiments of the present invention, there is provided a self-intermeshing extrusion apparatus comprising a single screw extrusion device of the first aspect of embodiments of the present invention.
The self-meshing extrusion equipment provided by the embodiment of the invention has at least the following beneficial effects: by arranging the single-screw extrusion device provided by the embodiment of the first aspect of the invention, the output of materials can be facilitated, the materials are pushed and conveyed in the sealed cavity, the volume pulsation of the cavity changes, the melting plasticization and mixing of the materials are accelerated, and the production quality and the production efficiency are improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic cross-sectional view of a single screw extrusion apparatus of an embodiment of the first aspect of the present invention having a screw head number of 2 and a barrel head number of 3;
FIG. 2 is a schematic axial cross-sectional view of a single screw extrusion apparatus having a screw head number of 2 and a barrel head number of 3 according to an embodiment of the first aspect of the present invention;
FIG. 3 is a schematic cross-sectional view of a single screw extrusion apparatus having a screw head number of 2 according to an embodiment of the first aspect of the present invention;
FIG. 4 is a schematic cross-sectional view of a single screw extrusion apparatus having a barrel head number of 3 according to an embodiment of the first aspect of the present invention;
FIG. 5 is a schematic cross-sectional view of a single screw extrusion apparatus of an embodiment of the first aspect of the present invention having a screw head number of 3 and a barrel head number of 4;
FIG. 6 is a schematic cross-sectional view of a single screw extrusion apparatus having a screw head number of 3 according to an embodiment of the first aspect of the present invention;
FIG. 7 is a schematic cross-sectional view of a single screw extrusion apparatus having a barrel head number of 4 according to an embodiment of the first aspect of the present invention;
FIG. 8 is a schematic axial cross-sectional view of a single screw extrusion apparatus having 4 screw heads and 5 barrel heads according to an embodiment of the first aspect of the present invention;
FIG. 9 is a schematic view of a self-engaging extrusion apparatus according to an embodiment of the second aspect of the present invention;
fig. 10 is another schematic view of a self-engaging extrusion apparatus in accordance with an embodiment of the second aspect of the present invention.
Reference numerals illustrate:
Screw 100, first circle 110, second circle 120, third circle 130;
Barrel 200, fourth circle 210, fifth circle 220, sixth circle 230;
A driving mechanism 310, a feed inlet 320 and a die 330.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
As will be appreciated, referring to fig. 1 to 4, the single screw extrusion apparatus according to the first aspect of the present invention comprises a screw 100 and a barrel 200, the screw 100 being disposed through the barrel 200, and the screw 100 being engaged with the barrel 200, the molded lines of the barrel 200 and the screw 100 being formed by alternately connecting epicycloidal and hypocycloidal lines; establishing a plane rectangular coordinate system with an origin o, a horizontal axis x and a vertical axis y, setting a first circle 110, a second circle 120, a third circle 130, a fourth circle 210, a fifth circle 220 and a sixth circle 230, wherein the circle center of the first circle 110 and the circle center of the fourth circle 210 are both set at the origin o, the epicycloidal line of the screw 100 is a locus of a point on the second circle 120 when the second circle 120 performs slip-free tangential rolling motion outside the first circle 110, and the hypocycloid of the screw 100 is a locus of a point on the third circle 130 when the third circle 130 performs slip-free tangential rolling motion inside the first circle 110; the epicycloid of the machine barrel 200 is the locus of a point on the fifth circle 220 when the fifth circle 220 makes no-slip tangential rolling movement outside the fourth circle 210, and the hypocycloid of the machine barrel 200 is the locus of a point on the sixth circle 230 when the sixth circle 230 makes no-slip tangential rolling movement inside the fourth circle 210; wherein the epicycloidal of the screw 100 is N 1N2, the hypocycloid of the screw 100 is N 2N3, the angle between the line between the point on the curve N 1N2 and the origin o and the x axis is theta 1, the angle between the line between the point on the curve N 2N3 and the origin o and the x axis is theta 2, the epicycloidal of the machine barrel 200 is M 1M2, the hypocycloid of the machine barrel 200 is M 2M3, the angle between the line between the point on the curve M 1M2 and the origin o and the x axis is theta 1', the included angle between the line between the point on the curve M 2M3 and the origin o and the x-axis is θ 2 ", the radii of the first circle 110, the second circle 120, the third circle 130, the fourth circle 210, the fifth circle 220 and the sixth circle 230 are r 1、r2、r3、r1″、r2" and r 3 "in sequence, the head number of the screw 100 is Q, the head number of the barrel 200 is q+1, and the head number Q is a positive integer greater than or equal to 1, so that: r 1＝(r2+r3)*Q、r1″＝(r2″+r3 ") x (q+1);
the equation for curve N 1N2 is:
Wherein 0 < θ 1＜2*π*r2/(Q*(r2+r3));
The equation for curve N 2N3 is:
Wherein 0 < θ 2＜-2*π*r3/(Q*(r2+r3));
The equation of curve M 1M2 is
Wherein 0 < θ 1″＜2*π*r2″/((Q+1)*(r2″+r3 ");
The equation for curve M 2M3 is:
wherein 0 < θ 2″＜-2*π*r3″/((Q+1)*(r2″+r3 ").
The screw 100 is arranged in the machine barrel 200 in a penetrating way, the molded lines of the screw 100 and the machine barrel 200 are alternately formed by an epicycloid and a hypocycloid, the epicycloid of the screw 100 is the locus of one point on the second circle 120 when the second circle 120 makes slip-free tangential rolling on the outer side of the first circle 110, and the hypocycloid of the screw 100 is the locus of one point on the third circle 130 when the third circle 130 makes slip-free tangential rolling on the inner side of the first circle 110; the epicycloid of the barrel 200 is the locus of a point on the fifth circle 220 when the fifth circle 220 makes no-slip tangential rolling movement outside the fourth circle 210, the hypocycloid of the barrel 200 is the locus of a point on the sixth circle 230 when the sixth circle 230 makes no-slip tangential rolling movement inside the fourth circle 210, the molded lines of the screw 100 and the barrel 200 are a plurality of repeated parts, the radiuses of the first circle 110, the second circle 120, the third circle 130, the fourth circle 210, the fifth circle 220 and the sixth circle 230 are r 1、r2、r3、r1″、r2 'and r 3' in sequence, the head number of the screw 100 is Q, the head number of the barrel 200 is Q+1, and the head number Q is a positive integer greater than or equal to 1, so that: r 1＝(r2+r3)*Q、r1″＝(r2″+r3 ") and (q+1), self-cleaning of the screw 100 and barrel 200 is achieved by defining curves N 1N2, N 2N3, M 1M2 and M 2M3 to enable the screw 100 and barrel 200 to remain engaged. And along with the rotation of the screw rod 100, the volume enclosed by the screw rod 100 and the machine barrel 200 is periodically changed, so that materials are continuously extruded and stretched in the screw groove, the stretching effect of a side clearance area of the meshing part of the screw rod 100 and the machine barrel 200 and the shearing effect of the clearance between the head of the screw rod 100 and the inner wall of the machine barrel 200 are enhanced, and the melting, plasticizing and mixing of the materials are accelerated, thereby shortening the production period and saving the energy consumption. In addition, by setting the screw 100 as a single screw, the single screw extrusion device has the advantage of high yield, and can improve plasticizing efficiency and mixing capability, maintain self-cleaning function, and improve processing efficiency of materials.
It should be noted that, the molded lines of the screw 100 and the barrel 200 are composed of a plurality of epicycloids and a plurality of hypocycloids, and the epicycloids and the hypocycloids are alternately connected, so that the molded lines of the screw 100 and the barrel 200 are repeated parts, the epicycloids and the hypocycloids are a group, a plurality of groups of epicycloids and hypocycloids are sequentially connected, the epicycloids and the inner and outer lines of a group are 1 head, the number of heads of the barrel 200 is 1 head more than that of the screw 100, and the outer wall of the screw 100 and the inner wall of the barrel 200 are in topological structures, so that the screw 100 can be meshed at any time when rotating in the barrel 200, the self-cleaning performance can be improved, the material conveying is facilitated, and the material conveying continuity is improved. And, the ratio of the lead of screw 100 to barrel 200 is equal to the ratio of the lead of screw 100 to the number of heads of barrel 200, so that screw 100 divides the interior of barrel 200 into Q independent chambers, the volume of which changes periodically as screw 100 rotates, more material is conveyed into the chamber when the volume increases, and the pressure in the chamber increases when the volume decreases, so that the material is compacted and conveyed forward, and the melting plasticization and mixing of the material are accelerated.
It will be appreciated that referring to fig. 1 and 9, the screw 100 is driven to move by the driving mechanism 310, the driving mechanism 310 may include a motor and a crank, one end of the crank is fixedly connected to an output end of the motor, the other end of the crank is connected to a bearing, the screw 100 is connected to the bearing, and the crank is driven to rotate by the motor so that the screw 100 can move in a planetary manner in the barrel 200 to enable the screw 100 to be engaged with an inner wall of the barrel 200.
The driving mechanism 310 may also include a motor, a first gear, a second gear and a third gear, where the first gear and the second gear are external gears, the third gear is an internal gear, the first gear is fixedly connected to an output end of the motor, the second gear is fixedly connected to an end of the screw 100, the second gear is engaged with the first gear and the third gear, and the first gear is driven to rotate by the motor, so that the second gear can perform planetary motion, and the screw 100 can be engaged with an inner wall of the barrel 200.
The driving mechanism 310 may further include a crank, a first motor and a second motor, one end of the crank is fixedly connected to an output end of the first motor, the other end of the crank is connected to the second motor, the screw 100 is fixedly connected to an output end of the second motor, the crank is driven to rotate by the first motor, so that the screw 100 can revolve around the crank, the screw 100 is driven to rotate by the second motor, so that the screw 100 can move in a planetary manner in the barrel 200, and the screw 100 is meshed with an inner wall of the barrel 200.
It will be appreciated that referring to fig. 1-4, the screw 100 has a head number of 2 and the barrel 200 has a head number of 3. By setting the head number Q of the screw 100 to 2 and the head number Q of the barrel 200 to 3, the molded line of the cross section of the screw 100 is made to be two repeated parts;
Wherein the equation for curve N 1N2 is:
Wherein 0 < θ 1＜2*π*r2/(2*(r2+r3));
the curve N 2N3 equation is:
Wherein 0 < θ 2-2*π*r3/(2*(r2+r3));
The cross-sectional profile of barrel 200 is a repeating 3-part;
Wherein the equation for curve M 1M2 is:
Wherein 0 < θ 1″＜2*π*r2″/(3*(r2″+r3 ");
The equation for curve M 2M3 is:
wherein 0 < θ 2″＜-2*π*r3″/(3*(r2″+r3 ").
The screw 100 and the machine barrel 200 are simple in shape, the processing and manufacturing cost is reduced, the production efficiency of the single screw extrusion device can be improved, and the processing quality of materials is improved.
It will be appreciated that referring to fig. 5-7, the screw 100 has a head number of 3 and the barrel 200 has a head number of 4. By setting the head number Q of the screw 100 to 3, the head number Q of the barrel 200 to 4 so that the molded line of the cross section of the screw 100 is a repeated 3-part;
Wherein the equation for curve N 1N2 is:
Wherein 0 < θ 1＜2*π*r2/(3*(r2+r3));
the curve N 2N3 equation is:
Wherein 0 < θ 2-2*π*r3/(3*(r2+r3));
The cross-sectional profile of barrel 200 is a repeating 4-part;
Wherein the equation for curve M 1M2 is:
Wherein 0 < θ 1″＜2*π*r2″/(4*(r2″+r3 ");
The equation for curve M 2M3 is:
wherein 0 < θ 2″＜-2*π*r3″/(4*(r2″+r3 ").
By arranging 3 repeated parts of the cross section molded lines of the screw 100, the cavities formed by the screw 100 and the machine barrel 200 are increased, the melting, plasticizing and mixing of materials are accelerated, and the processing efficiency of the materials is improved.
It will be appreciated that with reference to fig. 2 and 8, the screw 100 and barrel 200 are tapered in shape. When being applied to injection molding equipment with this structure, through setting up the shape of screw rod 100 and barrel 200 for the toper to make the axial volume of screw rod 100 reduce gradually, the axial volume of barrel 200 also reduces gradually, when making screw rod 100 drive material carry in barrel 200, can increase the axial pressure of material along, make things convenient for the output of material, need not to separate the shaping step with plasticizing and being full of, make the tensile mixing and the filling mould of material can go on in step, shortened the fashioned time of product, reduce the energy consumption, improve the productivity effect.
In addition, when being applied to the extrusion field with this structure, can keep the advantage of single screw extrusion device high yield and high mixing efficiency, conical screw 100 and barrel 200 can make the smooth and easy follow feed inlet discharge of air in screw 100 and the barrel 200, avoid the air to block up in holding the intracavity, realize good gas discharge. And the reduction of the axial volume can compact the materials, so that the compactness of the product is improved, and the processing quality of the product is improved.
It will be appreciated that, referring to fig. 1, 9 and 10, the self-meshing extrusion apparatus according to the second aspect of the present invention includes the single screw extrusion device according to the first aspect of the present invention, and has all the technical features of the single screw extrusion device according to the present embodiment, so that the self-meshing extrusion apparatus also has the advantages of all the above embodiments, and will not be described herein.
The self-meshing extrusion device may be an injection molding device or an extrusion device.
Referring to fig. 9, when the self-engaged extrusion apparatus is an injection molding apparatus, the self-engaged extrusion apparatus comprises a driving mechanism 310, a feed port 320, a barrel 200, a screw 100 and a mold 330, wherein the screw 100 is inserted into the barrel 200, the screw 100 is driven to move in the barrel 200 by the driving mechanism 310, the screw 100 is engaged with the barrel 200, materials are fed from the feed port 320 so as to move in the screw 100 and the barrel 200, the materials enter a cavity formed by the screw 100 and the barrel 200, due to eccentric rotation of the screw 100, the cavity volume between the screw 100 and the engaged barrel 200 is changed in a pulsating manner, the periodic increase, the decrease and the increase are performed, the materials are pushed in a sealed cavity, and the progressive decrease of the volume of a screw groove along the injection direction can increase the pressure of the material conveying, so that the materials are compacted gradually, and after the materials are melted under the external heating and viscous heat dissipation effects of the barrel 200, the periodic circumferential volume shrinkage and expansion and the axial pressure effects are enhanced. And the material is continuously subjected to stretching of a narrow gap between the screw edge and the lateral direction of the machine barrel 200 and strong shearing of a narrow gap in the circumferential direction, so that strong dispersion, distribution and mixing of the material are promoted, and then the homogenized material is injected into the die 330, so that the material is molded in the die 330, and the processing quality and efficiency of the material are improved.
Referring to fig. 10, when the self-meshing extrusion apparatus is an extrusion apparatus, the self-meshing extrusion apparatus comprises a driving mechanism 310, a feed inlet 320, a machine barrel 200 and a screw 100, wherein materials are fed from the feed inlet 320, the screw 100 is driven to move in the machine barrel 200 through the driving mechanism 310, so that the materials can be conveyed along the axial direction of the screw 100, and are melted under the action of external heating and viscous heat dissipation of the machine barrel 200, the materials are further plasticized along with the reduction of the flow channel volume in the extrusion direction, and air in glassy materials is discharged through the feed inlet 320, so that the materials are further compacted. The self-meshing of the screw 100 and the machine barrel 200 ensures that extrusion equipment has good self-cleaning property, and the reduction of product quality caused by the residue of materials in the processing process is avoided; meanwhile, the rapid change of the volume of the screw groove in the processing process increases extrusion pressure, and the screw groove has certain processing advantages especially for high-melting-point materials, and the periodic increase and decrease of the circumferential volume are overlapped by strong stretching and strong shearing simultaneously, so that the dispersity is uniformly distributed in the processing process of the multiphase system.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (5)
1. The single-screw extrusion device is characterized by comprising a screw and a machine barrel, wherein the screw is arranged in the machine barrel in a penetrating way, the screw is meshed with the machine barrel, and molded lines of the machine barrel and the screw are formed by alternately connecting epicycloids and hypocycloids;
Establishing a plane rectangular coordinate system with an origin of o, a horizontal axis of x and a vertical axis of y, and setting a first circle, a second circle, a third circle, a fourth circle, a fifth circle and a sixth circle, wherein the circle center of the first circle and the circle center of the fourth circle are both arranged at the origin o, the epicycloidal line of the screw is a track of a point on the second circle when the second circle does slip-free tangential rolling motion outside the first circle, and the hypocycloid of the screw is a track of a point on the third circle when the third circle does slip-free tangential rolling motion inside the first circle; the epicycloid of the machine barrel is the locus of a point on the fifth circle when the fifth circle does slip-free tangential rolling motion outside the fourth circle, and the hypocycloid of the machine barrel is the locus of a point on the sixth circle when the sixth circle does slip-free tangential rolling motion inside the fourth circle;
The hypocycloid of the screw is N 1N2, the hypocycloid of the screw is N 2N3, the included angle between a point on a curve N 1N2 and an x axis is theta 1, the included angle between a connecting line of a point on a curve N 2N3 and an origin o and the x axis is theta 2, the hypocycloid of the machine barrel is M 1M2, the included angle between a connecting line of a point on a curve M 1M2 and an origin o and the x axis is theta 1 ", the included angle between a point on a curve M 2M3 and the x axis is theta 2", the radiuses of the first circle, the second circle, the third circle, the fourth circle, the fifth circle and the sixth circle are r 1、r2、r3、r1″、r2 'and r 3' in sequence, the head number of the screw is Q, the head number of the machine barrel is Q+1, and the head number Q is a positive integer greater than or equal to 1, and the following: r 1＝(r2+r3)*Q、r1″＝(r2″+r3 ") x (q+1);
the equation for curve N 1N2 is:
Wherein 0 < θ 1＜2*π*r2/(Q*(r2+r3));
The equation for curve N 2N3 is:
Wherein 0 < θ 2＜-2*π*r3/(Q*(r2+r3));
The equation of curve M 1M2 is
Wherein 0 < θ 1″＜2*π*r2″/((Q+1)*(r2″+r3 ");
The equation for curve M 2M3 is:
wherein 0 < θ 2″＜-2*π*r3″/((Q+1)*(r2″+r3 ").
2. The single screw extrusion apparatus of claim 1 wherein the number of heads of the screw is 2 and the number of heads of the barrel is 3.
3. The single screw extrusion apparatus of claim 1 wherein the number of heads of the screw is 3 and the number of heads of the barrel is 4.
4. The single screw extrusion apparatus of claim 1 wherein the shape of the screw and the barrel is tapered.
5. Self-intermeshing extrusion apparatus comprising a single screw extrusion device according to any of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410236344.6A CN118082153A (en) | 2024-03-01 | 2024-03-01 | Single screw extrusion device and self-meshing extrusion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410236344.6A CN118082153A (en) | 2024-03-01 | 2024-03-01 | Single screw extrusion device and self-meshing extrusion equipment |
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| Publication Number | Publication Date |
|---|---|
| CN118082153A true CN118082153A (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410236344.6A Pending CN118082153A (en) | 2024-03-01 | 2024-03-01 | Single screw extrusion device and self-meshing extrusion equipment |
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| Country | Link |
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| CN (1) | CN118082153A (en) |
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