CN203863989U

CN203863989U - Plastic extruding machine screw device

Info

Publication number: CN203863989U
Application number: CN201420211256.2U
Authority: CN
Inventors: 顾庆峰
Original assignee: HANGZHOU NUOTONG INDUSTRIAL Co Ltd
Current assignee: HANGZHOU NUOTONG INDUSTRIAL Co Ltd
Priority date: 2014-04-29
Filing date: 2014-04-29
Publication date: 2014-10-08
Anticipated expiration: 2024-04-29

Abstract

The utility model discloses a plastic extruding machine screw device. The device comprises a charging section, a fusing section, an exhausting section and a mixing section connected in sequence, wherein the charging section, the fusing section and the mixing section are the same in thread diameter; the exhaust section is a conical screw of which the large head end is connected with the mixing section while the small head end is connected with the fusing section, and has an external cone angle of 3.25 degrees; at least three mixing rings are arranged on the mixing section of the screw and comprise a plurality of slanting edge stripes arranged on the excircle surface of the screw and distributed uniformly; the included angle of each slanting edge stripe and the axial line of the screw ranges from 32 to 38 degrees. The plastic extruding machine screw device provided by the utility model is reasonable in structure, high in transportation speed, and good in quality of plastic extruded.

Description

A kind of screw of plastic extruder device

Technical field

The utility model belongs to technics of reclaim of plastic waste field, refers in particular to screw of plastic extruder device.

Background technology

Along with the continuous reinforcement of people's environmental consciousness, waste plastics has obtained good recycling.At present generally will first carry out granulation to the waste plastics of retrieving, the waste plastics that completes granulation is used for producing product as raw material.Will be to the waste plastics heating and melting of crossing through cleaning, drying in the process of granulation, the waste plastics of melting is extruded through plastic extruder, draws granulation.And screw rod is the strength member in extruder, made by the steel alloy of high-strength corrosion-resisting.The range of application of extruding machine and productivity ratio all directly depend on the stability of the equal Uniform of temperature of the melt that machine extrudes and pressure, extrusion capacity, and these parameters all directly depend on the architectural characteristic energy of screw rod.

Existing screw flight design is divided into three sections, and it refers to that screw rod is made up of feeding section, compression section, three sections of screw threads of homogenizing zone, a kind of screw rod that its extrusion relies on the form of screw thread to complete completely, and the pitch between its screw thread is equidistant setting, and the screw rod of this structure is applied in while in extruder carrying out waste or used plastics to carry, because feeding section equates completely with the pitch of compression section and homogenizing zone, therefore at plastics at feeding section, compression section equated with the time of homogenizing zone, and the squeezing action power size of receiving is identical, and waste plastics is while entering from the solid of feeding section the section of melting, can produce a large amount of organic exhaust gas, once organic exhaust gas can not effectively be discharged, be easy to cause in plastic grain that extruder produces organic exhaust gas content too much, the plastic grain quality that causes extruder to produce is not good, affect its use.

Summary of the invention

For solving the problems of the technologies described above, the purpose of this utility model be to provide a kind of rational in infrastructure, transporting velocity fast and the measured screw of plastic extruder device of extrusion plastic grain matter.

For achieving the above object, a kind of screw of plastic extruder device of the utility model, comprise the feeding section, melt zone, exhaust section and the mixing section that are linked in sequence, the diameter of thread of described feeding section, melt zone and mixing section equates, it is characterized in that: described exhaust section is a conical screw, the stub end of described conical screw is connected with described mixing section, and its little head end is connected with described melt zone, and the outside cone angle angle of this conical screw is 3.25 °; The mixing section of described screw rod is provided with at least three mixing rings, and described mixing ring comprises the some inclination ribs that are evenly distributed on described screw rod periphery, and the axis angle of described inclination rib and described screw rod is 32 °～38 °.

On the basis of such scheme, preferably, the pitch of described feeding section is 2:1:2 with the pitch of melt zone with the ratio of the pitch of exhaust section.

On the basis of such scheme, preferably, the length of described feeding section and the length of the length of melt zone and exhaust section and the length ratio of mixing section are 6:7:5:3.

The utility model compared with prior art, its beneficial effect is: the utility model by arranging an exhaust section between melt zone and mixing section, and exhaust section is arranged to tapered screw rod, and the outside cone angle angle of this conical screw is 3.25 °, when waste or used plastics particle through the screw rod transmission of feeding section to melt zone, be fluid state through melt zone fusing, after waste or used plastics melting, the organic exhaust gas in waste or used plastics is discharged and enters exhaust section, because exhaust section is conical screw, plastics under fluid state are entered after exhaust section, fluid plastic is squeezed power from large to small, make the organic exhaust gas compressed discharge gradually in exhaust section in fluid plastic, simultaneously, because the stub end of the conical screw of exhaust section is connected with mixing section, therefore, can effectively avoid plastic extrusion to be obstructed, regenerate thereby not only can reduce the waste gas mixing in plastics, to ensure again the quality of extrusion plastic, and after exhaust section, be equipped with a mixing section, by being arranged on the some inclination ribs on screw rod, can fully the plastic liquid after exhaust be mixed again, further to guarantee the quality of its extrusion plastic.

Brief description of the drawings

Fig. 1 is the structure chart of screw of plastic extruder device of the present utility model.

Detailed description of the invention

By describe in detail the utility model technology contents, structural feature, reached object and effect, below hereby exemplify embodiment and coordinate accompanying drawing to be explained in detail.

Refer to shown in Fig. 1, the utility model provides a kind of screw of plastic extruder device, comprise the feeding section 10, melt zone 20, exhaust section 30 and the mixing section 40 that are linked in sequence, wherein, the diameter of thread of feeding section 10, melt zone 20 and mixing section 40 is equal, and exhaust section 30 is conical screw, and the stub end of this conical screw is connected with mixing section 40, its little head end is connected with melt zone 20, and the outside cone angle angle of this conical screw is 3.25 °; The mixing section 40 of this screw rod is provided with at least three mixing rings 41, and this mixing ring 41 comprises some inclination ribs that are evenly distributed on screw rod periphery, and the axis angle of this inclination rib and screw rod is 32 °～38 °.

When work, when waste or used plastics particle enters after feeding section 10, along with the rotation of screw rod, drive by the screw thread on feeding section 10, enter melt zone 20, plastic grain fusing after melt zone 20 heating is flow-like, organic exhaust gas in waste or used plastics is released with fluid plastic and mixes, when the plastics and the organic exhaust gas mixture that are flow-like enter after exhaust section 30, because the screw rod of exhaust section 30 is conical screw, and the little head end of this screw rod is connected with melt zone 20, its stub end is connected with mixing section 40, therefore, enter after exhaust section 30 when being the plastics of flow-like, the squeezing action power that fluid plastic is subject to from large to small, the organic exhaust gas that makes to mix in fluid plastic is squeezed and is excluded, and due to its pressure being subject to from large to small, therefore, when fluid plastic enters mixing section 40, be unlikely to because of the active force that is squeezed excessive, causing it to extrude is obstructed, experiment shows, in the time that the outside cone angle angle of conical screw is 3.25, the plastics that indwelling remains in screw rod are 1%, and in the plastics of extruding, organic exhaust gas content is 3%, can effectively guarantee plastic extrusion quality, and connect mixing section 40 at exhaust section place, some that on screw rod periphery by mixing section 40, arrange are the inclination rib of 32 °～38 ° with the axis angle of screw rod, can be by the plastics that form after exhaust again evenly extruding output, effectively guarantee the quality of plastic extrusion, make that screw of plastic extruder device of the present utility model has advantages of that extrusion capacity is stable, the high and high speed extrusion of good airproof performance, production capacity.

In order to ensure that plastics enter in screw rod, plastics are fully melted, and effectively organic exhaust gas in plastics is discharged, to guarantee to extrude rear plastic quality, the pitch A of feeding section 10 of the present utility model is 2:1:2 with the ratio of the pitch B of melt zone 20 and the pitch C of exhaust section 30, and the length L 1 of feeding section is 6:7:5:3 with the length L 2 of melt zone 20 with the ratio of the length L 3 of exhaust section 30 and the length L 4 of mixing section 40.

In sum, be only the preferred embodiment of the utility model, do not limit protection domain of the present utility model with this, all equivalences of doing according to the utility model the scope of the claims and description change and modify, within being all the scope that the utility model patent contains.

Claims

1. a screw of plastic extruder device, comprise the feeding section, melt zone, exhaust section and the mixing section that are linked in sequence, it is characterized in that: the diameter of thread of described feeding section, melt zone and mixing section equates, and described exhaust section is a conical screw, the stub end of described conical screw is connected with described mixing section, its little head end is connected with described melt zone, and the outside cone angle angle of this conical screw is 3.25 °; The mixing section of described screw rod is provided with at least three mixing rings, and described mixing ring comprises the some inclination ribs that are evenly distributed on described screw rod periphery, and the axis angle of described inclination rib and described screw rod is 32 °～38 °.

2. screw of plastic extruder device as claimed in claim 1, is characterized in that: the pitch of described feeding section is 2:1:2 with the pitch of melt zone with the ratio of the pitch of exhaust section.

3. screw of plastic extruder device as claimed in claim 2, is characterized in that: the length of described feeding section and the length of the length of melt zone and exhaust section and the length ratio of mixing section are 6:7:5:3.