CN203665916U - Single plastic extrusion screw - Google Patents
Single plastic extrusion screw Download PDFInfo
- Publication number
- CN203665916U CN203665916U CN201320880581.3U CN201320880581U CN203665916U CN 203665916 U CN203665916 U CN 203665916U CN 201320880581 U CN201320880581 U CN 201320880581U CN 203665916 U CN203665916 U CN 203665916U
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- China
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- section
- screw
- spiral shell
- shell rib
- plastic extrusion
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- Expired - Fee Related
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a single plastic extrusion screw. The single plastic extrusion screw comprises a feeding section, a fusion separation section, a barrier section and a mixing section, wherein screw edges are respectively arranged on the feeding section, the fusion separation section, the barrier section and the mixing section; the feeding section adopts a double-pitch structure. According to the single plastic extrusion screw disclosed by the utility model, the friction and the skidding among plastic particles can be reduced and the conveying efficiency of materials by a screw is increased. By gradually increasing the screw pitch of double screw-edge sections, gradual transition of melt pressure at the screw edges of the feeding section and the fusion separation section is realized and the pressure stability of the melt is ensured; the bottom diameters of the screw edges are increased from small to big and a feeding space formed by the screw edges and a blanking bushing is reduced, and thus greater pressure is generated for pushing the melt of the fusion separation section forward.
Description
Technical field
The utility model relates to the parts of extruder, is specifically related to a kind of plastic extrusion list screw rod.
Background technology
In traditional plastic industry, the screw-rod structure of single screw extrusion machine is divided into: feeding section, melting segregation section, barrier screen, mixing section (as shown in Figure 1).This list screw-rod structure is that single-lead mainly exists following defect: screw rod output is subject to head pressure to affect detail, and plastic extrusion fluctuation is large; The friction of plastic pellet between feeding section and liner section is large, easily produces heat, needs cooling body that temperature is reduced, and could keep the specific discharge of feeding section and head pressure stable; Under high head pressure, screw rod production declining is obvious, and production efficiency reduces.In order to solve the feeding defect of traditional screw-rod structure, general way is in lining, to process rectangular channel, V-shaped groove, helicla flute, and object is to increase the frictional force of lining to plastic pellet, makes up the deficiency of screw feeding amount.But under higher screw speed, high frictional force easily makes the particle temperature of feeding section raise, and when long-play, need to strengthen the cooling of lining, it is solid-state keeping feeding section graininess.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of plastic extrusion list screw rod, solving traditional screw rod output affected obviously by head pressure, plastic extrusion fluctuation is large, the friction of plastic pellet between feeding section and liner section is large, easily produce the problem of heat, the utility model is under different rotating speeds and head pressure, and specific discharge is stable.
The technical solution adopted in the utility model is as follows:
A kind of plastic extrusion list screw rod, comprises feeding section, melting segregation section, barrier screen and mixing section, and described feeding section, melting segregation section, barrier screen and mixing section are equipped with spiral shell rib, and described feeding section is two pitch airscrew structure.
The utility model can be realized the increase step by step of pitch by this two pitch airscrew structure, be conducive to the step by step transition of melt pressure at feeding section and melting segregation section spiral shell rib, guarantees the stable of melt pressure.
Preferably, described two pitch airscrew structure comprises unequal the first spiral shell rib section of pitch and the second spiral shell rib section.
Spiral shell rib by two spiral shell rib sections produces thrust to plastic pellet jointly, reduces the friction slip between plastic pellet, improves screw rod transmission material efficiency.
Preferably, described the first spiral shell rib section pitch is less than the second spiral shell rib section pitch.
Preferably, described the first spiral shell rib section increases gradually to the footpath, the end of the second spiral shell rib section.
The changing from small to big of footpath at the bottom of screw rod, reduces with the feeding space that lining forms, and plastic pellet, in the interval in footpath at the bottom of spiral shell rib, is compressed by screw compulsory, produces larger pressure the melt of melting segregation section is pushed ahead.
Preferably, the 8%-11% that the footpath, the end of described the first spiral shell rib section is screw diameter.
Compared with prior art, the beneficial effect the utlity model has: the utility model can reduce the friction slip between plastic pellet, improves screw rod transmission material efficiency; Pitch by two spiral shell rib sections increases step by step, realizes the step by step transition of melt pressure at feeding section and melting segregation section spiral shell rib, guarantees the pressure stability of melt; At the bottom of spiral shell rib, change from small to big in footpath, and the feeding space forming between blanking lining minimizing, thereby produce larger pressure, the melt of melting segregation section pushed ahead.
Accompanying drawing explanation
Fig. 1: traditional plastic extrusion list screw-rod structure schematic diagram;
Fig. 2: structural representation of the present utility model.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
Embodiment 1
As shown in Figure 2, a kind of plastic extrusion list screw rod, comprises feeding section 1, melting segregation section 2, barrier screen 3 and mixing section 4, and described feeding section 1, melting segregation section 2, barrier screen 3 and mixing section 4 are equipped with spiral shell rib, and described feeding section is two pitch airscrew structure.
Described two pitch airscrew structure comprises unequal the first spiral shell rib section 5 of pitch and the second spiral shell rib section 6.
Described the first spiral shell rib section 5 pitch are less than the second spiral shell rib section pitch 6.
The footpath, the end of described the first spiral shell rib section 5 to second spiral shell rib sections 6 increases gradually.
The 8%-11% that the footpath, the end 7 of described the first spiral shell rib section 5 is screw diameter.
Claims (5)
1. a plastic extrusion list screw rod, comprises feeding section, melting segregation section, barrier screen and mixing section, and described feeding section, melting segregation section, barrier screen and mixing section are equipped with spiral shell rib, it is characterized in that, described feeding section is two pitch airscrew structure.
2. plastic extrusion list screw rod according to claim 1, is characterized in that, described two pitch airscrew structure comprises unequal the first spiral shell rib section of pitch and the second spiral shell rib section.
3. plastic extrusion list screw rod according to claim 2, is characterized in that, described the first spiral shell rib section pitch is less than the second spiral shell rib section pitch.
4. plastic extrusion list screw rod according to claim 3, is characterized in that, described the first spiral shell rib section increases gradually to the footpath, the end of the second spiral shell rib section.
5. plastic extrusion list screw rod according to claim 4, is characterized in that, the 8%-11% that the footpath, the end of described the first spiral shell rib section is screw diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320880581.3U CN203665916U (en) | 2013-12-30 | 2013-12-30 | Single plastic extrusion screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320880581.3U CN203665916U (en) | 2013-12-30 | 2013-12-30 | Single plastic extrusion screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203665916U true CN203665916U (en) | 2014-06-25 |
Family
ID=50962248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320880581.3U Expired - Fee Related CN203665916U (en) | 2013-12-30 | 2013-12-30 | Single plastic extrusion screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203665916U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325621A (en) * | 2014-10-29 | 2015-02-04 | 佛山市日丰企业有限公司 | PE extrusion screw |
-
2013
- 2013-12-30 CN CN201320880581.3U patent/CN203665916U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104325621A (en) * | 2014-10-29 | 2015-02-04 | 佛山市日丰企业有限公司 | PE extrusion screw |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20211230 |