CN204471833U - A kind of screw rod with bur - Google Patents
A kind of screw rod with bur Download PDFInfo
- Publication number
- CN204471833U CN204471833U CN201420774749.7U CN201420774749U CN204471833U CN 204471833 U CN204471833 U CN 204471833U CN 201420774749 U CN201420774749 U CN 201420774749U CN 204471833 U CN204471833 U CN 204471833U
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- CN
- China
- Prior art keywords
- main thread
- section
- screw
- bur
- feed zone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of screw rod with bur, comprise screw body, screw body has feed zone, fusing section, homogenizing zone and discharging section; Feed zone has main thread, and the end face of main thread and two sides are provided with bur; Feed zone accounts for 20% ~ 35% of screw body length; Fusing section and discharging section have main thread, and main thread footpath height vertically reduces gradually, and the tail end of discharging section is provided with two toothed discs with communication port, and the communication port of two toothed discs shifts to install; The end of discharging section, with screwed hole, is provided with screw head, and screw head is provided with spiral flow deflector.With bur on feed zone of the present utility model, not only can polish to material, to extrude and just broken, and material can be made to mix on feed zone evenly.
Description
Technical field
The utility model relates to the screw rod with bur.
Background technology
The effect of extruder screw makes sizing material gradually become rectilinear motion with screw rod rotary motion, passes, and match with fuselage to heading, compression heat generation, softening stirring, blend glue stuff.
The motion of material in extruder screw is divided into three sections of researchs, thus the design of screw rod also often segmentation carry out.Because each section is continuous passage, so in actual production, as long as can meet the demands, not right and wrong screw rod is divided into three sections can not.Such as, when extruding the material of this class good crystallinity of nylon, only have feeding section and homogenizing zone, the screw rod of general Screw Extrusion soft polyvinyl chloride plastic, can adopt whole compression section, and need not be divided into feeding section and homogenizing zone.
The segmented of screw rod obtains from experience, depends mainly on the character of material.Feeding section length can from 0 to accounting for 75% of screw rod total length, and the longest when extruding crystalline polymer in general, rigid amorphous polymer takes second place, and soft amorphous polymer is the shortest.Compression section length accounts for 50% of screw rod total length usually, certainly resembles above-mentioned nylon and soft polyvinyl chloride plastic exception.During polyethylene extrusion the desirable total length of homogenizing zone length 20% ~ 25%.But to some temperature-sensitive material (as polyvinyl chloride), material should not stop long in this section, can not want homogenizing zone.Some high-speed extruder homogenizing zone length gets 50% unexpectedly.
For the screw rod of the extruder with homogenizing zone, its spiro rod length is longer, in the process extruded material, has important effect to the fragmentation of material and homogenizing.It is uneven that the screw rod of existing extruder in use has extruding, and the unstable product quality of discharging, material is poor at the homo-effect of machine barrel inside.
Utility model content
The purpose of this utility model is to provide one and can extrudes material, improves the screw rod of extruder with bur of homo-effect.
For reaching above-mentioned purpose, the technical scheme that the utility model adopts is: provide a kind of screw rod with bur, comprise screw body, and screw body has feed zone, fusing section, homogenizing zone and discharging section; The fineness ratio of screw body is 1:20 ~ 40; Feed zone has main thread, the screw body of the end face of main thread, two sides and feed zone is equipped with bur; Feed zone accounts for 20% ~ 35% of screw body length;
Fusing section have the main thread and deputy thread that reduce gradually towards discharging section, vertically pitch, fusing section comprises ascent stage and descending branch, main thread footpath height on the ascent stage raises gradually, the footpath height of deputy thread reduces gradually, main thread footpath height in descending branch reduces gradually, and the footpath height of deputy thread raises gradually;
Homogenizing zone has main thread, this main thread offers breach; Be provided with several mixing unit between homogenizing zone and fusing section, mixing unit comprises the first deep trouth, the second deep trouth and the raised line that distribute vertically; One end of described first deep trouth extends to fusing section, and one end of the second deep trouth extends to homogenizing zone;
Discharging section has main thread, and main thread footpath height vertically reduces gradually, and the tail end of discharging section is provided with two toothed discs with communication port, and the communication port of two toothed discs shifts to install; The end of discharging section, with screwed hole, is provided with screw head, and screw head is provided with spiral flow deflector.
In sum, the utility model has the following advantages:
1, on feed zone of the present utility model with bur, not only can polish to material, to extrude and just broken, and material can be made to mix on feed zone evenly;
2, melt the main thread in section and deputy thread, different according to position, make the threading path height of ascent stage and descending branch inconsistent, material also can be allowed more smooth in the movement of screw surface, and homo-effect is good;
3, material receives extruding in interlayer inside, thus it is better to seem the melting effect of plastic raw materials, reduces the occurrence probability that cannot plastic raw materials be made completely to dissolve.
Accompanying drawing explanation
Fig. 1 is plane of the present utility model;
Fig. 2 is the schematic diagram of feed zone;
Fig. 3 is the schematic diagram that mixing unit is connected with fusing section and homogenizing zone;
Fig. 4 is the side sectional view of mixing unit;
Fig. 5 is the scheme of installation of toothed disc;
Fig. 6 is the schematic diagram of screw head.
Wherein, 1, screw body; 2, feed zone; 3, section is melted; 4, homogenizing zone; 5, discharging section; 6, main thread; 7, deputy thread; 8, screw head; 9, flow deflector; 10, mixing unit; 11, the first deep trouth; 12, the second deep trouth; 13, raised line; 14, toothed disc; 15, communication port; 21, bur.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.
In an embodiment of the present utility model, as shown in Figure 1, provide a kind of screw rod with bur, comprise screw body 1, screw body 1 has feed zone 2, fusing section 3, homogenizing zone 4 and discharging section 5.The fineness ratio of screw body 1 is 1:20 ~ 40.
Feed zone 2 has main thread 6, the screw body 1 of the end face of the main thread 6 of feed zone 2, two sides and feed zone 2 is equipped with bur 21.Feed zone 2 accounts for 20% ~ 35% of screw body 1 length.Bur 21 can the projection of triangular in shape or prominent rhombus, and length dimension is 0.8cm ~ 1.5cm.Bur 21 can make material be subject to certain extruding force on feed zone 2, and material dispersion can be allowed more even, also can carry out certain fragmentation to larger, frangible material.
Fusing section 3 has the main thread 6 and deputy thread 7 that reduce gradually towards discharging section 5, vertically pitch, and fusing section 3 comprises ascent stage and descending branch, and the length of ascent stage and descending branch is equal, and the ascent stage is closer to feed zone 2.Main thread 6 footpath height on the ascent stage raises gradually, and the footpath height of deputy thread 7 reduces gradually, and the main thread 6 footpath height in descending branch reduces gradually, and the footpath height of deputy thread 7 raises gradually, the high height referring to screw thread in footpath, or perhaps groove depth.In fusing section 3 there is alternately change in the footpath height of screw thread, in ripple type, can realize the compression of material, loosen and hocket, finally can make the complete plasticizing of material and mix, can reduce the generation of bubble.
Homogenizing zone 4 has main thread 6, this main thread 6 offers breach, the opening direction of breach is axially, the degree of depth of breach can be main thread 6 footpath high 2/3rds, width is 1cm ~ 2cm.Breach can make the more sliding freedom of the flow direction of material on homogenizing zone 4, mutually blends between fluid.Be provided with four mixing unit 10 between homogenizing zone 4 and fusing section 3, mixing unit 10 comprises the first deep trouth 11, second deep trouth 12 and the raised line 13 distributed vertically.One end of first deep trouth 11 extends to the one end of melting section 3, second deep trouth 12 and extends to homogenizing zone 4; The degree of depth of the second deep trouth 12 is greater than the degree of depth of the first deep trouth 11.
Liquid material in fusing section 3 can successively through the first deep trouth 11, climb over raised line 13 after enter the second deep trouth 12, and then homogenizing zone 4 can be flowed into, because raised line 13 has certain altitude, certain extruding can be carried out to material.
Discharging section 5 has main thread 6, main thread 6 footpath height vertically reduces gradually, and the communication port 5 tail end of discharging section 5 is provided with two toothed discs, 14, two toothed discs 14 of communication port 15 shifts to install.The toothed disc 14 shifted to install can carry out certain extruding to material, and discharging is even.The end of discharging section 5, with screwed hole, is provided with screw head 8, and screw head 8 is provided with spiral flow deflector 9, and flow deflector 9 can make material discharging when discharging smooth and easy, not easily goes out to occur cohesion blocking at discharging opening.
Although describe in detail detailed description of the invention of the present utility model by reference to the accompanying drawings, should not be construed as the restriction of the protection domain to this patent.In the scope described by claims, the various amendment that those skilled in the art can make without creative work and distortion still belong to the protection domain of this patent.
Claims (4)
1. with a screw rod for bur, comprise screw body, screw body has feed zone, fusing section, homogenizing zone and discharging section; It is characterized in that:
The fineness ratio of described screw body is 1:20 ~ 40; Described feed zone has main thread, the screw body of the end face of main thread, two sides and feed zone is equipped with bur; Feed zone accounts for 20% ~ 35% of screw body length;
Described fusing section have the main thread and deputy thread that reduce gradually towards discharging section, vertically pitch, fusing section comprises ascent stage and descending branch, main thread footpath height on the ascent stage raises gradually, the footpath height of deputy thread reduces gradually, main thread footpath height in descending branch reduces gradually, and the footpath height of deputy thread raises gradually;
Described homogenizing zone has main thread, this main thread offers breach; Be provided with several mixing unit between homogenizing zone and fusing section, mixing unit comprises the first deep trouth, the second deep trouth and the raised line that distribute vertically; One end of described first deep trouth extends to fusing section, and one end of the second deep trouth extends to homogenizing zone;
Described discharging section has main thread, and main thread footpath height vertically reduces gradually, and the tail end of discharging section is provided with two toothed discs with communication port, and the communication port of two toothed discs shifts to install; The end of discharging section, with screwed hole, is provided with screw head, and screw head is provided with spiral flow deflector.
2. screw rod as claimed in claim 1, is characterized in that: described bur is triangular in shape.
3. screw rod as claimed in claim 1, is characterized in that: the ascent stage of described fusing section is equal with the length of descending branch.
4. screw rod as claimed in claim 1, is characterized in that: the degree of depth of described second deep trouth is greater than the degree of depth of the first deep trouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420774749.7U CN204471833U (en) | 2014-12-11 | 2014-12-11 | A kind of screw rod with bur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420774749.7U CN204471833U (en) | 2014-12-11 | 2014-12-11 | A kind of screw rod with bur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204471833U true CN204471833U (en) | 2015-07-15 |
Family
ID=53627617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420774749.7U Expired - Fee Related CN204471833U (en) | 2014-12-11 | 2014-12-11 | A kind of screw rod with bur |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204471833U (en) |
-
2014
- 2014-12-11 CN CN201420774749.7U patent/CN204471833U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20151211 |
|
| EXPY | Termination of patent right or utility model |