CN213441067U

CN213441067U - Full-meshing homodromous double-screw extruder screw

Info

Publication number: CN213441067U
Application number: CN202022265111.9U
Authority: CN
Inventors: 钱晓玲; 钱成龙
Original assignee: Nanjing Kerke Extrusion Equipment Co ltd
Current assignee: Nanjing Kerke Extrusion Equipment Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-06-15
Anticipated expiration: 2030-10-12

Abstract

The utility model provides a full meshing syntropy twin-screw extruder screw rod, including two full meshed screw rods, the screw rod is including dabber, screw rod body and rotating head, the spindle is equipped with the screw rod body, and the rotating head is installed to the dabber end, and the screw rod body makes up in proper order has reinforced section, melting section, mixing section, exhaust section and homogenization section. The feeding port is provided with large-lead threads to ensure smooth feeding, and the melting section is provided with small-lead threads to build pressure, so that the materials are compressed and melted. The conveying elements are arranged, so that the material conveying capacity is enhanced, and the retention time is short. The screw lead is gradually reduced in the homogenization section to realize pressurization, the length of the backpressure section is reduced, the wide screw ridge screw is adopted to improve the discharge capacity, and bubbling is avoided.

Description

Full-meshing homodromous double-screw extruder screw

Technical Field

The utility model belongs to the technical field of fatigue test macromolecular material extruder equipment, concretely relates to meshing syntropy double screw extruder screw rod entirely.

Background

The meshed co-rotating twin-screw extruder is processing equipment commonly used in extrusion processing, and at present, the meshed co-rotating twin-screw extruder develops towards the directions of high rotating speed, large torque, higher melting plasticizing efficiency, better mixing quality and lower energy consumption. Intermeshing co-rotating twin screw extruders have excellent mixing and good suitability and are currently one of the first continuous mixing devices for polymer modification, the most common being used in extrusion devices. Most often, in the user, one piece of equipment is often used up, and the replacement of the product is only achieved by replacing the head. In fact, the intermeshing co-rotating twin-screw extruder has an extremely excellent performance: the combined screw and the combined machine barrel have the universality, namely, the best use effect on different materials and formulas is realized by changing the combination sequence of the screw and the combined machine barrel. In China, a plurality of users of the co-rotating double-screw extruder always use one double-screw extruder, but the screws are purchased from the double-screw extruder and discarded, and the screws are hardly disassembled and recombined, so that the screw combination is always used and produced to the end.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a full meshing syntropy double screw extruder screw rod, it is reinforced easy, dwell time is short, and exhaust performance is good.

The utility model provides a following technical scheme: a screw rod of a full-meshing co-rotating double-screw extruder comprises two full-meshing screw rods, wherein each screw rod comprises a mandrel, a screw rod body and a rotating head, the mandrel is arranged in the screw rod body, the two ends of the mandrel extend out of the screw rod body, the rotating head is arranged at the tail end of the mandrel, and the screw rod body is sequentially combined with a feeding section, a melting section, a mixing section, an exhaust section and a homogenizing section;

the feeding section, the melting section, the mixing section, the exhaust section and the homogenizing section are all provided with screw thread elements, the middle part of the melting section is also provided with a kneading element, the mixing section is also provided with a conveying element, a shearing element and a tooth-shaped element, the conveying element and the shearing element are arranged at intervals, the tooth-shaped element is arranged in the middle of the mixing section, and the screw thread element is arranged at the tail end of the mixing section.

Preferably, the feeding section screw element adopts a large-lead screw; the thread element in the melting section adopts a small-lead thread; the screw thread element in the mixing section adopts a forward screw thread element; the screw thread element in the exhaust section adopts a reverse screw thread element; the screw thread element in the homogenizing section adopts a wide screw thread element.

Preferably, the homogenization section thread lead tapers.

Preferably, the kneading element stagger angle of the melt section is 90 °.

The utility model has the advantages that: the feeding port is provided with large-lead threads to ensure smooth feeding, and the melting section is provided with small-lead threads to build pressure, so that the materials are compressed and melted. The conveying elements are arranged, so that the material conveying capacity is enhanced, and the retention time is short. The screw lead is gradually reduced in the homogenization section to realize pressurization, the length of the backpressure section is reduced, the wide screw ridge screw is adopted to improve the discharge capacity, and bubbling is avoided.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the overall structure of the present invention.

Labeled as: the device comprises a feeding section A, a melting section B, a mixing section C, an exhaust section D, a homogenizing section E, a mandrel 1, a screw body 2, a rotating head 3, a large-lead screw thread 4, a small-lead screw thread 5, a kneading element 6, a conveying element 7, a shearing element 8, a tooth-shaped element 9, a wide screw thread 10 and a reverse screw thread 11.

Detailed Description

As shown in fig. 1 and 2, a screw of a full-meshing co-rotating twin-screw extruder comprises two full-meshing screws, wherein each screw comprises a mandrel 1, a screw body 2 and a rotating head 3, the mandrel 1 is provided with the screw body 2, two ends of the mandrel extend out of the screw body 2, the rotating head 3 is arranged at the tail end of the mandrel 1, and the screw body 2 is sequentially combined with a feeding section a, a melting section B, a mixing section C, an exhaust section D and a homogenizing section E;

the feeding section A, the melting section B, the mixing section C, the exhaust section D and the homogenizing section E are all provided with screw elements, wherein the middle part of the melting section B is also provided with a kneading element 6, the mixing section C is also provided with a conveying element 7, a shearing element 8 and a tooth-shaped element 9, wherein the conveying element 7 and the shearing element 8 are arranged at intervals, the tooth-shaped element 9 is arranged in the middle of the mixing section C, and the screw elements are arranged at the tail end of the mixing section C.

The feeding section A is provided with a large-lead thread 4 to ensure smooth feeding, and the melting section B adopts a small-lead thread 5 to build pressure so as to compress and melt the materials. The kneading elements 6 of the melting section B were staggered at an angle of 90 deg.. The mixing section C is provided with a conveying element 7, a shearing element 8 and a tooth-shaped element 9 to enhance the material conveying capacity, the retention time is short, the exhaust section D is provided with a reverse threaded element 11, the homogenizing section E is provided with a wide screw thread element 10 to gradually reduce the screw thread lead to realize pressurization, the length of the backpressure section is reduced, and the discharge capacity is improved by adopting the wide screw thread element 10.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. 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 screw rod of a full-meshing co-rotating double-screw extruder comprises two full-meshing screw rods and is characterized in that the screw rods comprise a mandrel (1), a screw rod body (2) and a rotating head (3), the mandrel (1) is arranged in the screw rod body (2), the screw rod body (2) extends out of two ends of the mandrel (1), the rotating head (3) is installed at the tail end of the mandrel (1), and the screw rod body (2) is sequentially provided with a feeding section (A), a melting section (B), a mixing section (C), an exhaust section (D) and a homogenizing section (E);

the feeding section (A), the melting section (B), the mixing section (C), the exhaust section (D) and the homogenizing section (E) are all provided with screw thread elements, wherein the middle part of the melting section (B) is also provided with a kneading element (6), the mixing section (C) is also provided with a conveying element (7), a shearing element (8) and a tooth-shaped element (9), the conveying element (7) and the shearing element (8) are arranged at intervals, the tooth-shaped element (9) is arranged in the middle of the mixing section (C), and the screw thread elements are arranged at the tail end of the mixing section (C).

2. A screw for a fully intermeshing co-rotating twin-screw extruder according to claim 1, wherein the screw elements of the feeding section (a) are of a high lead screw (4); the thread element in the melting section (B) adopts a small-lead thread (5); the screw thread element in the mixing section (C) adopts a forward screw thread element; the screw thread element in the exhaust section (D) adopts a reverse screw thread element (11); the screw thread element in the homogenizing section (E) adopts a wide screw thread element (10).

3. Screw according to claim 1, in which the homogenization section (E) has a decreasing thread lead.

4. A screw for a fully intermeshing co-rotating twin-screw extruder according to claim 1, characterized in that the kneading elements (6) of the melting section (B) are staggered by an angle of 90 °.