CN114368119A - Single-screw extrusion injection device - Google Patents
Single-screw extrusion injection device Download PDFInfo
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- CN114368119A CN114368119A CN202111489043.7A CN202111489043A CN114368119A CN 114368119 A CN114368119 A CN 114368119A CN 202111489043 A CN202111489043 A CN 202111489043A CN 114368119 A CN114368119 A CN 114368119A
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- screw
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
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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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/58—Details
- B29C45/60—Screws
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a single-screw extrusion injection device, which comprises a machine barrel and a screw; the screw is positioned in the machine barrel and provided with a screw ridge, the screw is provided with a thrust flow guide structure and a dragging flow guide structure, the initial end of the thrust flow guide structure is connected with the thrust surface, the tail end of the thrust flow guide structure extends towards the dragging surface, the initial end of the dragging flow guide structure is connected with the dragging surface, the tail end of the dragging flow guide structure extends towards the thrust surface, and a gap is formed between the screw ridge and the inner wall of the machine barrel by the thrust flow guide structure and the dragging flow guide structure; the solid bed is pushed to perform turnover motion and migration motion along the flow guide direction, so that the migration of the molten film is accelerated, the blockage of the solid bed is eliminated, and the melting efficiency is improved; reducing the lateral circulation dependence within the cross section of the screw channel; enhancing the heat transfer effect and the distributed dispersion mixing effect.
Description
Technical Field
The invention relates to the technical field of screws, in particular to a single-screw extrusion injection device.
Background
The single-screw mechanism has the advantages of simple structure, convenient operation and maintenance and capability of establishing stable extrusion pressure, and is widely applied to the processes of extrusion molding and injection molding. The single screw mechanism is mainly a friction drag mechanism, and the flow can be decomposed into longitudinal positive flow along the development direction of the screw grooves and transverse circulation flow perpendicular to the screw grooves. Since melt plasticization and kneading depend mainly on the transverse circulation, and the ratio of the transverse circulation to the longitudinal positive flow strength is tan θ, θ is a helix angle, and θ is usually 17.65 degrees. Thus, the ratio of the transverse longitudinal flow strengths is about 0.3182. It can be seen that the transverse strength is about one third of the longitudinal flow strength, and longitudinal flow macro-flow texture control is the dominant factor of the single screw mechanism. When a single screw is applied to injection molding, melt plasticizing mixing occurs in the process of screw retraction, which causes the longitudinal flow to be increased sharply, the transverse flow to be decreased sharply, the ratio of the transverse flow to the longitudinal flow is even close to zero, the action of the transverse circulation is extremely small, and the efficiency of the injection screw is greatly reduced.
On the other hand, the larger the output of the single-screw mechanism is, the faster the movement speed of the material in the core area in the screw groove is, the weaker the action of the transverse circulation is, and the more remarkable the non-uniformity of the melting and plasticizing of the material is. To ensure the quality of single screw plastification melt, an increase in outlet back pressure is used to compensate, resulting in a reduction in throughput and an increase in energy consumption. In order to strengthen the melting plasticizing and mixing capability of a single screw, a resistance type element based on transverse circulation is adopted, the resistance type element is provided with a plurality of divided runners, more stagnation points and dead zones are introduced into the runners, the self-cleaning capability of the screw is reduced, and the residence time distribution is difficult to control. The mixing efficiency of the single-screw mechanism based on the cross-circulation is significantly reduced when the throughput is increased, or during the injection molding.
Disclosure of Invention
The invention aims to solve at least one technical problem in the prior art and provides a single-screw extrusion injection device.
The technical scheme adopted by the invention for solving the problems is as follows:
a single screw extrusion injection device comprising:
a barrel;
the screw rod is positioned in the machine barrel, the outer surface of the screw rod is provided with a screw ridge which extends spirally along the axial direction of the screw rod, the outer surface of the screw rod is provided with a thrust flow guide structure and a dragging flow guide structure which are arranged in a mutually staggered mode, the initial end of the thrust flow guide structure is connected with the thrust surface of the screw ridge, the tail end of the thrust flow guide structure extends towards the dragging surface of the screw ridge, the initial end of the dragging flow guide structure is connected with the dragging surface of the screw ridge, the tail end of the dragging flow guide structure extends towards the thrust surface of the screw ridge, a gap is formed between the screw ridge and the inner wall of the machine barrel by the thrust flow guide structure and the dragging flow guide structure, and the thrust flow guide structure and the dragging flow guide structure are used for forming alternate vortices in the longitudinal flow direction.
Furthermore, the thrust diversion structure is streamline, the cross section of the thrust diversion structure is gradually reduced from the initial end to the tail end, and the thrust diversion structure is gradually narrowed from one side close to the screw rod to one side far away from the screw rod to form a first guide line.
Furthermore, the dragging flow guide structure is streamline, the cross section of the dragging flow guide structure is gradually reduced from the initial end to the tail end, and the dragging flow guide structure is gradually narrowed from one side close to the screw rod to one side far away from the screw rod to form a second guide line.
Furthermore, an included angle formed by the first guide line and the longitudinal flow direction is a first diversion angle alpha, an included angle formed by the second guide line and the longitudinal flow direction is a second diversion angle beta, when alpha is larger than 0 and smaller than pi/2, beta is larger than 0 and smaller than pi/2, and the single-screw extrusion injection device adopts a sequential arrangement mode; when pi/2 is more than alpha and less than pi and pi/2 is more than beta and less than pi, the single-screw extrusion injection device adopts a reverse arrangement mode; when alpha is more than 0 and less than pi/2 and beta is more than pi, the single-screw extrusion injection device adopts a mixed arrangement mode; when pi/2 is more than alpha and less than pi and beta is more than 0 and less than pi/2, the single-screw extrusion injection device adopts a mixed arrangement mode.
Further, the length of the development straight line of the thrust flow guide structure is less than pi D sin gamma/sin alpha, the length of the development straight line of the dragging flow guide structure is less than pi D sin gamma/sin beta, gamma is a single screw thread helix angle, and D is the screw outer diameter length.
Further, the distance between two thrust and flow guide structures is S1, and S1 meets the condition that pi D/sin (gamma/20) < S1 < 2 pi D/sin gamma; the distance between two connected towing diversion structures is S2, and S2 meets the condition that pi D/sin (gamma/20) < S2 < 2 pi D/sin gamma.
Further, the distance between the adjacent thrust flow guide structures and the adjacent drag flow guide structures is S3, and S3 satisfies 0-S3-4 pi D/sin gamma.
Further, the height between the starting end of the thrust flow guide structure and the outer side edge of the screw is h1, and h1 is aD; the height between the starting end of the dragging flow guide structure and the outer side edge of the screw is h2, and h2 is aD; a ranges from 0.0001 to 0.005 and D is the length of the outer diameter of the screw.
Further, the outermost side of the screw rib abuts against the inner wall of the machine barrel.
Further, the machine barrel comprises a conveying section, a melting section, a mixing section and a homogenizing section which are connected in sequence.
The single-screw extrusion injection device at least has the following beneficial effects: the thrust flow guide structure extends from the thrust surface and the drag flow guide structure extends from the drag surface, so that the solid bed can be pushed to perform turnover motion and migration motion along the flow guide direction, the migration of a molten film is accelerated, the blockage of the solid bed is eliminated, and the melting efficiency is effectively improved; by utilizing the wall surface strengthening effect of the thrust surface and the dragging surface and the vortex strengthening effect in a two-dimensional plane formed by the longitudinal flow direction and the width direction of the screw groove, the dependence on the transverse circulation flow in the cross section of the screw groove can be reduced; in addition, the narrow compression gap effect formed by the flow guide structure and the side wall of the spiral edge, the vortex in the expansion plane of the spiral groove caused by the flow guide of the flow guide structure, and the stage-series vortex effect caused by the local structures of the windward side and the leeward side of the flow guide structure can effectively enhance the heat transfer effect and the distributed and dispersed mixing effect.
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 invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a structural view of a single screw extrusion injection apparatus according to an embodiment of the present invention;
FIG. 2 is a block diagram of a screw;
FIG. 3 is a block diagram of a thrust guide structure and a drag guide structure in an inline manner;
FIG. 4 is a block diagram of a thrust vectoring structure and a drag vectoring structure in a counter-row manner;
FIG. 5 is a block diagram of a thrust guide structure and a drag guide structure using a mixed-row approach;
FIG. 6 is a schematic structural view of a thrust vectoring structure;
FIG. 7 is a schematic structural view of a towed deflector;
fig. 8 is a schematic structural view of a towing diversion structure.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood 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 otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 and 2, an embodiment of the present invention provides a single screw 200 extrusion injection device.
The single screw 200 extrusion injection apparatus includes a barrel 100 and a screw 200.
The screw 200 is positioned in the cylinder 100, the outer surface of the screw 200 is provided with a screw ridge 210 spirally extending along the axial direction of the screw 200, the outer surface of the screw 200 is provided with a thrust flow guide structure 220 and a drag flow guide structure 230 which are staggered with each other, the initial end of the thrust flow guide structure 220 is connected with the thrust surface 201 of the screw ridge 210, the tail end of the thrust flow guide structure 220 extends towards the drag surface 202 of the screw ridge 210, the initial end of the drag flow guide structure 230 is connected with the drag surface 202 of the screw ridge 210, the tail end of the drag flow guide structure 230 extends towards the thrust surface 201 of the screw ridge 210, a gap is formed between the screw ridge 210 and the inner wall of the cylinder 100 by the thrust flow guide structure 220 and the drag flow guide structure 230, and the thrust flow guide structure 220 and the drag flow guide structure 230 are used for forming alternate vortices in the longitudinal flow direction.
In this embodiment, the thrust flow guide structure 220 extends from the thrust surface 201 and the drag flow guide structure 230 extends from the drag surface 202, so as to push the solid bed to perform the turning motion and the migration motion along the flow guide direction, accelerate the migration of the molten film, eliminate the blockage of the solid bed, and effectively improve the melting efficiency; by utilizing the wall surface strengthening effect of the thrust surface 201 and the drag surface 202 and the vortex strengthening effect in a two-dimensional plane formed by the longitudinal flow direction and the width direction of the screw groove, the dependence on the transverse circulation flow in the cross section of the screw groove can be reduced; in addition, the narrow compression gap effect formed by the flow guide structure and the side wall of the spiral ridge 210, the vortex in the expansion plane of the spiral groove caused by the flow guide structure, and the stage-series vortex effect caused by the local structures of the windward side and the leeward side of the flow guide structure can effectively enhance the heat transfer effect and the distributed and dispersed mixing effect.
The left and right side walls of the screw 210 form a dragging surface 202 and a pushing surface 201 respectively according to the stress condition of the conveyed material. A groove is formed between the two ridges 210.
The thrust flow guide structures 220 and the drag flow guide structures 230 are periodically arranged from the compression section of the screw 200.
In some embodiments of the invention, the barrel 100 has a feed port 101 on the upper side of one end and a discharge port 102 on the other end. The barrel 100 is provided with a conveying section 110, a melting section 120, a mixing section and a homogenizing section in sequence from a feed inlet 101 to a discharge outlet 102.
In some embodiments of the invention, the outermost side of the flight 210 abuts the inner wall of the barrel 100. A material flow channel 140 is formed between the inner wall of barrel 100 and the outer surface of screw 200.
In some embodiments of the present invention, the thrust flow guiding structure 220 is streamlined, a cross section of the thrust flow guiding structure 220 gradually decreases from a beginning end to a tail end, and the thrust flow guiding structure 220 gradually narrows from a side close to the screw rod 200 to a side far from the screw rod 200 and forms a first guiding line 221.
In some embodiments of the present invention, the towing diversion structure 230 is streamlined, a cross section of the towing diversion structure 230 gradually decreases from a beginning end to a tail end, and the towing diversion structure 230 gradually narrows from a side close to the screw 200 to a side far from the screw 200 and forms a second guide line 231.
In this embodiment, the streamlined thrust flow guide structure 220 and the drag flow guide structure 230 can effectively reduce the stagnation effect of the fluid and improve the self-cleaning capability of the spiral groove.
In some embodiments of the present invention, an included angle formed by the first guiding line 221 and the longitudinal flow direction is a first diversion angle α, referring to fig. 6, angle AO1B is alpha. The included angle formed by the second guide line 231 and the longitudinal flow direction is a second diversion angle beta, refer to fig. 7, and angle CO2D is beta.
Referring to fig. 3, fig. 3 is a structural view of a thrust guide structure 220 and a drag guide structure 230 in an inline manner. When alpha is more than 0 and less than pi/2 and beta is more than 0 and less than pi/2, the single screw 200 extrusion injection device adopts a sequential mode.
Referring to fig. 4, fig. 4 is a structural view of a thrust guide structure 220 and a drag guide structure 230 using a reverse arrangement method. When pi/2 is more than alpha and less than pi and pi/2 is more than beta and less than pi, the single screw 200 extrusion injection device adopts a reverse arrangement mode.
Referring to fig. 5, fig. 5 is a structural view of a thrust guide structure 220 and a drag guide structure 230 using a mixed-row method. When pi/2 is more than alpha and less than pi and beta is more than 0 and less than pi/2, the single screw 200 extrusion injection device adopts a mixed arrangement mode. Or when alpha is more than 0 and less than pi/2 and beta is more than pi, the single screw 200 extrusion injection device also adopts a mixed arrangement mode.
Referring to fig. 3, in some embodiments of the present invention, the length of the extended straight line of the thrust flow guiding structure 220 is less than pi D sin γ/sin α, the length of the extended straight line of the towing flow guiding structure 230 is less than pi D sin γ/sin β, γ is the helix angle of the screw edge 210 of the single screw 200, and D is the outer diameter length of the screw 200.
In some embodiments of the invention, the distance between two thrust and flow guiding structures 220 is S1, and S1 satisfies pi D/sin (gamma/20) < S1 < 2 pi D/sin gamma; the distance between the two towing diversion structures 230 is S2, and S2 satisfies pi D/sin (gamma/20) < S2 < 2 pi D/sin gamma.
According to some embodiments of the invention, the distance between the adjacent thrust flow guiding structures 220 and the adjacent drag flow guiding structures 230 is S3, and S3 satisfies 0 ≦ S3 ≦ 4 π D/sin γ.
In some embodiments of the present invention, referring to fig. 6, the height between the start end of the thrust flow guiding structure 220 and the outer edge of the screw 200 is h1, h1 ═ aD; referring to fig. 7, the height between the start end of the trailing diversion structure 230 and the outer edge of the screw 200 is h2, and h2 is aD; a ranges from 0.0001 to 0.005 and D is the length of the outer diameter of the screw 200.
Referring to fig. 6, fig. 6 is a schematic structural view of the thrust flow guiding structure 220. In some embodiments of the present invention, the thrust flow guiding structure 220 is a triangular prism structure with a triangular cross-section. Of course, the same configuration may be used for the trailing baffle structure 230.
Referring to fig. 7, fig. 7 is a schematic structural view of the towed deflector 230. In some embodiments of the present invention, the towing diversion structure 230 is a furrow-plough-like structure, the first guiding line 221 or the second guiding line 231 is a circular arc line, one side surface of the first guiding line 221 or the second guiding line 231 is a crescent surface, and the other side surface of the first guiding line 221 or the second guiding line 231 is a paddle surface. Of course, the thrust vectoring structure 220 may be configured in the same manner.
Referring to fig. 8, fig. 8 is another structural schematic view of the towed deflector 230. In some embodiments of the present invention, the towing diversion structure 230 is a furrow plough-like structure, and the first guiding line 221 or the second guiding line 231 is an S-shaped arc. Of course, the thrust vectoring structure 220 may be configured in the same manner.
Certain embodiments of the present invention provide a plasticating extrusion method that utilizes a single screw 200 extrusion injection apparatus as described above.
The material enters the machine barrel 100 from the feeding hole 101, and the screw 200 rotates around the axis of the screw; under the action of friction, the material moves along the screw channel in the material flow channel 140 to the discharge port 102 and is continuously compacted, passes through the conveying section 110 and enters the melting section 120.
The material entering the melting section 120 continuously moves forward along the screw groove under the rotation action of the screw 200, and is further compacted to form a solid bed, and is partially melted under the action of external heating and frictional heat generation; the solid bed formed by the materials is continuously pushed forwards along the longitudinal direction of the spiral groove and is acted by the thrust diversion structure 220 and the dragging diversion structure 230, the solid bed is subjected to overturning movement and migration movement along the diversion direction, the migration of the molten film is accelerated, the blockage of the solid bed is eliminated, and the melting efficiency is effectively improved. The molten material continues to be conveyed forward under the action of friction force and enters the metering section 130, and the metering section 130 comprises a mixing section and a homogenizing section.
The molten material entering the metering section 130 continues to travel under the influence of friction, the thrust inducer 220 and the drag inducer 230. The melt is under the action of a tensile force field generated by the action of a narrow compression gap formed by the thrust flow guide structure 220, the dragging flow guide structure 230 and the side wall of the screw ridge 210, so that the dispersion mixing efficiency is improved; meanwhile, the melt is subjected to the vortex in the spiral groove unfolding plane caused by the drainage of the thrust flow guide structure 220 and the drag flow guide structure 230 and the cascade vortex action caused by the local structures of the windward side and the leeward side of the flow guide structures, so that the distribution, dispersion and mixing effects are effectively enhanced, the heat transfer effect is effectively enhanced, the melting and plasticizing processes of the material are further completed, the extrusion pressure is established, and the material is extruded from the discharge port 102 to complete the extrusion process.
In addition, during the material extrusion period, the thrust flow guide structure 220 and the drag flow guide structure 230 start from the side wall of the screw ridge 210 of the screw 200 and adopt a streamline design, thereby eliminating stagnation points in a flow channel, effectively improving the flow scouring effect of the root of the screw 200 through longitudinal flow control, and effectively improving the self-cleaning function of the device.
Certain embodiments of the present invention provide a plasticizing injection method that employs the single screw 200 extrusion injection apparatus described above.
The material enters the barrel 100 from the feed port 101, and the screw 200 rotates about its axis and retreats along the axis of the screw 200. Under the influence of friction, the material is transported forward in the material flow channel 140 and is continuously compacted, passing through the solid transport section 110, and entering the melting section 120.
The material entering the melting section 120 continuously moves forward along the screw groove under the rotation action of the screw 200, and is further compacted to form a solid bed, and is partially melted under the action of external heating and frictional heat generation; the solid bed formed by the materials is continuously pushed forwards along the longitudinal direction of the spiral groove and is acted by the thrust diversion structure 220 and the dragging diversion structure 230, the solid bed is subjected to overturning movement and migration movement along the diversion direction, the migration of the molten film is accelerated, and the melting efficiency is effectively improved. The molten material continues to be conveyed forward by friction into the metering section 130.
The melted materials enter the metering section 130 and continue to move forward under the action of friction force and the thrust flow guide structures 220 and the dragging flow guide structures 230, and the melt is subjected to the action of a tensile force field generated by the action of narrow compression gaps formed by the thrust flow guide structures 220 and the dragging flow guide structures 230 and the side walls of the spiral ribs 210, so that the dispersing and mixing efficiency is improved; meanwhile, the melt is subjected to the vortex in the spiral groove unfolding plane caused by the drainage of the thrust flow guide structure 220 and the drag flow guide structure 230 and the cascade vortex action caused by the local structures of the windward side and the leeward side of the flow guide structures, so that the distribution, dispersion and mixing effects are effectively enhanced, the heat transfer effect is effectively enhanced, the melting and plasticizing processes of the materials are further completed, and the melt subjected to melting and plasticizing is continuously conveyed to a cavity formed between the screw 200 and the machine barrel 100 along with the backward movement of the screw 200.
After the screw rod 200 reaches the backward extreme position, the screw rod moves forward along the axis of the machine barrel 100 under the action of the external axial thrust, the plasticized melt in front of the screw rod 200 is pushed to be ejected from the outlet, the injection movement is realized, and the plasticizing injection period is completed. Plasticizing injection is a periodic process that can be repeated when the injection is complete.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and the present invention shall fall within the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means.
Claims (10)
1. A single screw extrusion injection apparatus, comprising:
a barrel;
the screw rod is positioned in the machine barrel, the outer surface of the screw rod is provided with a screw ridge which extends spirally along the axial direction of the screw rod, the outer surface of the screw rod is provided with a thrust flow guide structure and a dragging flow guide structure which are arranged in a mutually staggered mode, the initial end of the thrust flow guide structure is connected with the thrust surface of the screw ridge, the tail end of the thrust flow guide structure extends towards the dragging surface of the screw ridge, the initial end of the dragging flow guide structure is connected with the dragging surface of the screw ridge, the tail end of the dragging flow guide structure extends towards the thrust surface of the screw ridge, a gap is formed between the screw ridge and the inner wall of the machine barrel by the thrust flow guide structure and the dragging flow guide structure, and the thrust flow guide structure and the dragging flow guide structure are used for forming alternate vortices in the longitudinal flow direction.
2. A single screw extrusion injection apparatus according to claim 1, wherein the thrust runner is streamlined, and the cross section of the thrust runner gradually decreases from the beginning to the end, and the thrust runner gradually narrows from the side close to the screw to the side away from the screw to form a first guide line.
3. The single screw extrusion injection apparatus of claim 2, wherein the dragging flow guide structure is streamlined, the cross section of the dragging flow guide structure is gradually reduced from the initial end to the terminal end, and the dragging flow guide structure is gradually narrowed from the side close to the screw to the side far away from the screw and forms a second guide line.
4. A single screw extrusion injection apparatus according to claim 3, wherein the angle formed by the first guide line and the longitudinal flow direction is a first diversion angle α, the angle formed by the second guide line and the longitudinal flow direction is a second diversion angle β, and when α is greater than 0 and less than pi/2 and β is greater than 0 and less than pi/2, the single screw extrusion injection apparatus is in an in-line manner; when pi/2 is more than alpha and less than pi and pi/2 is more than beta and less than pi, the single-screw extrusion injection device adopts a reverse arrangement mode; when alpha is more than 0 and less than pi/2 and beta is more than pi, the single-screw extrusion injection device adopts a mixed arrangement mode; when pi/2 is more than alpha and less than pi and beta is more than 0 and less than pi/2, the single-screw extrusion injection device adopts a mixed arrangement mode.
5. The single screw extrusion injection apparatus of claim 4, wherein the development linear length of the thrust flow guide structure is less than pi D sin gamma/sin alpha, the development linear length of the drag flow guide structure is less than pi D sin gamma/sin beta, gamma is the single screw flight helix angle, and D is the screw outer diameter length.
6. The single screw extrusion injection apparatus of claim 4, wherein the distance connecting the two thrust flow guides is S1,
s1 satisfies pi D/sin (gamma/20) < S1 < 2 pi D/sin gamma;
the distance connecting the two towed deflectors is S2,
s2 satisfies π D/sin (γ/20) < S2 < 2 π D/sin γ.
7. The single screw extrusion injection apparatus of claim 6, wherein the distance between the adjacent thrust flow guide structure and the drag flow guide structure is S3, and S3 satisfies 0. ltoreq.S 3. ltoreq.4 π D/sin γ.
8. A single screw extrusion injection apparatus as claimed in claim 1, wherein the height between the start of the thrust vectoring feature and the outer edge of the screw is h1, h1 ═ aD; the height between the starting end of the dragging flow guide structure and the outer side edge of the screw is h2, and h2 is aD; a ranges from 0.0001 to 0.005 and D is the length of the outer diameter of the screw.
9. A single screw extrusion injection apparatus as set forth in claim 1 wherein the outermost of said flights abut the inside wall of said barrel.
10. The single screw extrusion injection apparatus of claim 1, wherein the barrel comprises a conveying section, a melting section, a mixing section and a homogenizing section connected in sequence.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111489043.7A CN114368119A (en) | 2021-12-07 | 2021-12-07 | Single-screw extrusion injection device |
| PCT/CN2022/100854 WO2023103345A1 (en) | 2021-12-07 | 2022-06-23 | Single-screw extrusion injection apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111489043.7A CN114368119A (en) | 2021-12-07 | 2021-12-07 | Single-screw extrusion injection device |
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| CN114368119A true CN114368119A (en) | 2022-04-19 |
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| CN202111489043.7A Pending CN114368119A (en) | 2021-12-07 | 2021-12-07 | Single-screw extrusion injection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023103345A1 (en) * | 2021-12-07 | 2023-06-15 | 五邑大学 | Single-screw extrusion injection apparatus |
| WO2024021146A1 (en) * | 2022-07-25 | 2024-02-01 | 五邑大学 | Chaotic single-screw extrusion injection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116985359B (en) * | 2023-09-26 | 2024-02-23 | 江苏浩淼兴阳新材料有限公司 | Injection molding raw material mixing device |
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| CN114368119A (en) * | 2021-12-07 | 2022-04-19 | 五邑大学 | Single-screw extrusion injection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023103345A1 (en) * | 2021-12-07 | 2023-06-15 | 五邑大学 | Single-screw extrusion injection apparatus |
| WO2024021146A1 (en) * | 2022-07-25 | 2024-02-01 | 五邑大学 | Chaotic single-screw extrusion injection device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023103345A1 (en) | 2023-06-15 |
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