CN215242773U

CN215242773U - High-speed pipeline extrusion screw

Info

Publication number: CN215242773U
Application number: CN202121565069.0U
Authority: CN
Inventors: 徐锦宏
Original assignee: Zhoushan Jiading Plastic Machinery Co ltd
Current assignee: Zhoushan Jiading Plastic Machinery Co ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-12-21
Anticipated expiration: 2031-07-09

Abstract

The utility model provides a high-speed pipeline extrusion screw, including the linkage segment that distributes in proper order, the feeding section, the melting section, mixing section, homogenization section and screw head, be equipped with single spiral arris on the feeding section, be equipped with two spiral arris on the melting section, mixing section is the cylinder that one section diameter and single spiral arris major diameter match, interval processing feed chute and blown down tank on the outer circumference of mixing section, the feed chute is towards the one end opening of melting section and the other end seals, the blown down tank is towards the one end opening of homogenization section and the other end seals, the homogenization section is the cylinder that one section diameter is less than mixing section, evenly be equipped with integrated into one piece's annular dentate body along length direction on the homogenization section, form evenly distributed's tooth's socket on the annular dentate body, the tooth's socket dislocation distribution on two annular dentate bodies. In the screw structure, the double helix is arranged on the melting section to form a variable screw pitch, so that the materials are fully mixed, and meanwhile, the annular tooth bodies are arranged on the homogenizing section, and tooth grooves distributed in a staggered manner are formed between the two annular tooth bodies, so that the materials are further uniformly mixed.

Description

High-speed pipeline extrusion screw

Technical Field

The utility model relates to a high-speed pipeline extrusion screw.

Background

The screw is one of the core components of the extruder and functions to convey, compact, melt, stir and apply pressure to the plastic. When the screw rotates, the plastic generates friction and mutual movement on the inner wall of the material barrel, the bottom surface of the screw groove, the screw ridge propelling surface and the plastic. The forward propulsion of the plastic is the result of this combination of movements and the heat generated by the friction is also absorbed to raise the temperature of the plastic and melt it. In the prior art, the use of injection molding screws still has some drawbacks, such as: in use, can't accomplish many times to smelt and mixing behind the conveying screw in proper order to the plastic raw materials, lead to some plastic raw materials mixing inhomogeneous, smelt not fine enough, directly lead to the condition such as injection moulding product quality is not good.

SUMMERY OF THE UTILITY MODEL

To the weak point that exists in the above-mentioned problem, the utility model provides a high-speed pipeline extrusion screw.

In order to achieve the above object, the utility model provides a high-speed pipeline extrusion screw, including linkage segment, feeding section, melting section, mixing section, homogenization section and the screw head that distributes in proper order, be equipped with single spiral shell arris on the feeding section, be equipped with two spiral shell arriss on the melting section, mixing section is a section diameter and the cylinder that single spiral shell arris major diameter matches, interval processing feed chute and blown down tank on the mixing section outer circumference, the feed chute with the blown down tank is the heliciform and distributes, the feed chute is towards the one end opening and the other end of melting section seals, the blown down tank is towards the one end opening and the other end of homogenization section seals, the homogenization section is a section diameter and is less than the cylinder of mixing section, evenly be equipped with integrated into one piece's annular dentate body along length direction in the homogenization section, form evenly distributed's tooth's socket on the annular dentate body, the tooth sockets on two adjacent annular tooth-shaped bodies are distributed in a staggered mode.

As the utility model discloses the further improvement, two arriss include first arriss and second arriss, first arris one end with it is integrative that single arris is connected, first arris with pitch between the second arris by the feeding section to mixing section direction crescent.

As the utility model discloses the further improvement, the big footpath of first spiral shell arris with the big footpath of single spiral shell arris is unanimous, the big footpath of first spiral shell arris is greater than the big footpath of second spiral shell arris.

As a further improvement of the utility model, the crest width of the first screw ridge is larger than the crest width of the second screw ridge.

As the utility model discloses further improve, the degree of depth of feed chute reduces from the open end to blind end direction gradually, the degree of depth of blown down tank increases from blind end to open end direction gradually.

As the utility model discloses further improve, the quantity of tooth's socket is eight, be 30 contained angles between two relative lateral walls of tooth's socket.

The utility model has the advantages that:

1. in the screw structure, the melting section is provided with double screw ridges formed by a first screw ridge and a second screw ridge, wherein the first screw ridge is connected with a single screw ridge of the feeding section to form a whole, the screw pitch between the first screw ridge and the second screw ridge is in a change state along the conveying direction, and the major diameter of the second screw ridge is smaller than that of the first screw ridge, so that materials can flow back and forth between the first screw ridge and the second screw ridge, the compression ratio of the materials during conveying is increased, and the materials can be fully mixed;

2. a cylindrical mixing section is arranged between the melting section and the homogenizing section, and the surface of the mixing section is provided with a feeding groove and a discharging groove which are distributed at intervals;

3. set up annular dentate at the homogenization section, form the tooth's socket of dislocation distribution between two annular dentate, the material is piled up between two annular dentate and is flowed out by the tooth's socket dispersion, and the material is once more homogeneous mixing after repeated piling up and reposition of redundant personnel, and the plastify is effectual.

Drawings

FIG. 1 is an overall structure diagram of a high-speed pipe extrusion screw of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic plane development view of the high-speed pipe extrusion screw of the present invention;

FIG. 4 is a sectional view taken along line B-B of FIG. 3;

FIG. 5 is a cross-sectional view taken along line C-C of FIG. 3;

FIG. 6 is a schematic structural view of the kneading section 4;

fig. 7 is a sectional view taken along line D-D in fig. 6.

In the figure: 1. a connecting section; 2. a feeding section; 21. a single screw edge; 3. a melting section; 31. double screw edges; 311. A first helical edge; 312. a second helical edge; 4. a mixing section; 41. a feed chute; 42. a discharge chute; 5. a homogenization section; 51. an annular tooth-shaped body; 52. a tooth socket; 6. a screw head.

Detailed Description

As shown in FIG. 1, the high-speed pipeline extrusion screw of the present invention comprises a connection section 1, a feeding section 2, a melting section 3, a mixing section 4, a homogenizing section 5 and a screw head 6, which are distributed in sequence, wherein the feeding section 2 is provided with a single screw edge 21, the melting section 3 is provided with a double screw edge 31, the double screw edge 31 comprises a first screw edge 311 and a second screw edge 312, one end of the first screw edge 311 is connected with the single screw edge 21 to form a whole, the screw pitch of the first screw edge 311 is constant, the screw pitch between the first screw edge 311 and the second screw edge 312 is gradually increased from the feeding section 2 to the mixing section 4, the major diameter of the first screw edge 311 is consistent with the major diameter of the single screw edge 21, the major diameter of the first screw edge 311 is greater than the major diameter of the second screw edge 312, the crest width of the first screw edge 311 is greater than the crest width of the second screw edge 312, the mixing section 4 is a section with a diameter matching with the major diameter of the single screw edge 21, a cylindrical groove 41 and a discharge groove 42 are processed at intervals on the mixing section 4, the feeding groove 41 and the discharging groove 42 are distributed spirally, the feeding groove 41 is opened towards one end of the melting section 3, the other end of the melting section is closed, the discharging groove 42 is opened towards one end of the homogenizing section 5, the other end of the melting section is closed, the depth of the feeding groove 41 is gradually reduced from the opening end to the closing end, the depth of the discharging groove 42 is gradually increased from the closing end to the opening end, the homogenizing section 5 is a cylinder with a diameter smaller than that of the mixing section 4, the homogenizing section 5 is uniformly provided with an integrally formed annular toothed body 51 along the length direction, uniformly distributed tooth sockets 52 are formed on the annular toothed body 51, the number of the tooth sockets 52 is eight, an included angle of 30 degrees is formed between two opposite side walls of each tooth socket 52, and the tooth sockets 52 on two adjacent annular toothed bodies 51 are distributed in a staggered mode.

In the screw structure, the melting section is provided with double screw ridges formed by a first screw ridge and a second screw ridge, wherein the first screw ridge is connected with a single screw ridge of the feeding section to form a whole, the screw pitch between the first screw ridge and the second screw ridge is in a change state along the conveying direction, and the major diameter of the second screw ridge is smaller than that of the first screw ridge, so that materials can flow back and forth between the first screw ridge and the second screw ridge, the compression ratio of the materials during conveying is increased, and the materials can be fully mixed; a cylindrical mixing section is arranged between the melting section and the homogenizing section, and the surface of the mixing section is provided with a feeding groove and a discharging groove which are distributed at intervals; set up annular dentate at the homogenization section, form the tooth's socket of dislocation distribution between two annular dentate, the material is piled up between two annular dentate and is flowed out by the tooth's socket dispersion, and the material is once more homogeneous mixing after repeated piling up and reposition of redundant personnel, and the plastify is effectual.

When in specific use, the utility model is described with the attached drawings for the convenience of understanding;

the mixed materials enter a feeding section of the screw through a feeding hole of the extruder, the materials are still solid on the feeding section, and the materials are mutually rubbed through the rotation and the shearing of the screw, compressed and heated at the same time to be conveyed to a melting section of the screw; after the raw materials enter the melting section, the materials are continuously heated, rubbed with each other and sheared with the screw rods, and are gradually compacted and softened into a mixture of a melt and a fixed material, the mixture is slowly conveyed to the mixing section, the melt content is higher and lower when the mixture is closer to the mixing section, the solid content is lower, the first screw ridge mainly plays a role in conveying, the major diameter of the second screw ridge is designed to be smaller than that of the first screw ridge, the screw pitch between the second screw ridge and the first screw ridge is continuously increased along the feeding direction and is in a changing state, in one screw pitch of the first screw ridge, due to the obstruction of the second screw ridge, the materials alternately flow on two sides of the second screw ridge to form a turbulent flow state, the compression ratio during material conveying is increased, and the melting and mixing of the materials are accelerated; after the materials enter the mixing section, the mixing section separates the melt from the rest of the unmelted solid in the materials, the melted materials are extruded from the feeding groove to the discharging groove through the gap between the mixing section and the charging barrel, and then enter the homogenizing section, and the unmelted materials flow back to the melting section to be melted continuously; the melted materials enter the homogenizing section for further plasticizing, the melt is accumulated between the two annular tooth-shaped bodies and then flows out from the tooth grooves in a dispersing way, and is further uniformly mixed in repeated accumulation and flow distribution, and finally, the melt is uniformly extruded through a flow channel formed by the screw head and the charging barrel.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed pipeline extrusion screw is characterized in that: the device comprises a connecting section (1), a feeding section (2), a melting section (3), a mixing section (4), a homogenizing section (5) and a screw head (6) which are sequentially distributed, wherein a single screw rib (21) is arranged on the feeding section (2), a double screw rib (31) is arranged on the melting section (3), the mixing section (4) is a cylinder with a diameter matched with the major diameter of the single screw rib (21), a feeding groove (41) and a discharging groove (42) are processed on the outer circumference of the mixing section (4) at intervals, the feeding groove (41) and the discharging groove (42) are distributed in a spiral shape, the feeding groove (41) opens towards one end of the melting section (3) and closes the other end, the discharging groove (42) opens towards one end of the homogenizing section (5) and closes the other end, the homogenizing section (5) is a cylinder with a diameter smaller than that of the mixing section (4), and annular tooth-shaped bodies (51) which are integrally formed are uniformly arranged on the homogenizing section (5) along the length direction, the annular tooth bodies (51) are provided with tooth grooves (52) which are uniformly distributed, and the tooth grooves (52) on two adjacent annular tooth bodies (51) are distributed in a staggered mode.

2. A high speed pipe extrusion screw as defined in claim 1, wherein: the double-screw rib (31) comprises a first screw rib (311) and a second screw rib (312), one end of the first screw rib (311) is connected with the single screw rib (21) to form a whole, and the screw pitch between the first screw rib (311) and the second screw rib (312) is gradually increased from the feeding section (2) to the mixing section (4).

3. A high speed pipe extrusion screw as claimed in claim 2, wherein: the major diameter of the first screw rib (311) is consistent with that of the single screw rib (21), and the major diameter of the first screw rib (311) is larger than that of the second screw rib (312).

4. A high speed pipe extrusion screw as claimed in claim 2, wherein: the crest width of the first screw rib (311) is larger than the crest width of the second screw rib (312).

5. A high speed pipe extrusion screw as defined in claim 1, wherein: the depth of the feed chute (41) is gradually reduced from the opening end to the closed end, and the depth of the discharge chute (42) is gradually increased from the closed end to the opening end.

6. A high speed pipe extrusion screw as defined in claim 1, wherein: the number of the tooth grooves (52) is eight, and an included angle of 30 degrees is formed between two opposite side walls of the tooth grooves (52).