CN101234526B - Sealing device for extrusion machine screw rod tail - Google Patents
Sealing device for extrusion machine screw rod tail Download PDFInfo
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- CN101234526B CN101234526B CN2008100105506A CN200810010550A CN101234526B CN 101234526 B CN101234526 B CN 101234526B CN 2008100105506 A CN2008100105506 A CN 2008100105506A CN 200810010550 A CN200810010550 A CN 200810010550A CN 101234526 B CN101234526 B CN 101234526B
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- screw rod
- nitrogen
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- Extrusion Moulding Of Plastics Or The Like (AREA)
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Abstract
The invention relates to a twin-screw plastic extruder, which comprises a device for sealing screw tail. The screw tail is sleeved with a sealed room and a sealed ring which are connected by a bolt; the bolt is sleeved with a pressure spring and the sealed room is filled with sealed gas. From another angle, the twin-screw plastic extruder changes mechanism of the traditional device for sealing the screw tail and arranges the pressure spring to keep a compression balance as well as arranges a polytetrafluoroethylene (PTFE) sealed ring to be a friction pair so that good sealing effect and wear resistance are realized. Nitrogen is added in the sealed room and as sealed materials as well as lubricant and coolant of a rotation shaft, the nitrogen blows back leaked materials to an extruder cylinder and seals sealed surfaces easy to leak. The twin-screw plastic extruder completely solves the problems of leakage and corrosion of rotating sealed surfaces and witnesses a great leap of traditional plastic processing technology. Besides, the twin-screw plastic extruder has the advantages of remarkable application effect, leakage and corrosion resistance and prolonging of service life.
Description
One, technical field
The present invention relates to a kind of twin-screw plastic extruder, particularly bolt seal device.
Two, technical background
Generally, twin-screw screw of plastic extruder afterbody is with packing or seal ring seal, comprising compositions such as closed chamber, inner pressure ring, sealing ring, outer press rings, in the screw shaft rotary course, by the strain of packing or sealing ring, finish the rotatory sealing problem, because the processing materials breed difference, application is restricted, and exists attrition and leakage problem in the application all the time, particularly under the operating mode of height corrosion high-temperature, be difficult to solve its wearing and tearing and leakage problem.
Three, summary of the invention
The objective of the invention is to overcome above-mentioned not enough problem, a kind of sealing device for extrusion machine screw rod tail is provided, stop to reveal, reduce corrosion, increase the service life.
The technical scheme that the present invention is adopted for achieving the above object is: sealing device for extrusion machine screw rod tail, screw rod tail are set with closed chamber and sealing ring, and outer press ring is connected by bolt with closed chamber, fill sealing gas in the suit compression spring on the bolt, closed chamber.
Described sealing gas is a nitrogen, and by communication seals chamber in the bolt, return along the loop by a nitrogen part by pipeline for nitrogen, and a part of blowback forms nitrogen-sealed in reinforced machine barrel.
Described sealing ring is a teflon seal ring.
Described outer press ring is a semi-ring formula split outer press ring.
Between described closed chamber and the screw rod inner pressure ring is housed.
Described inner pressure ring is a semi-ring formula split inner pressure ring.
The present invention is from another angle, changed the mechanism of traditional screw rod tail sealing device, by changing the structural principle of screw rod tail sealing device, having changed screw rod tail adds merely and fills out the packing structure, be provided with the compression spring that keeps the compression balance, be provided with the polytetrafluoroethylene (PTFE) sealing ring as friction pair, good sealing effect but also wear-resisting not only, in closed chamber, fill and add nitrogen, nitrogen is as the lubricant and the cooling agent of encapsulant and rotating shaft, and the part of nitrogen is returned along the loop, and a part of blowback is in reinforced machine barrel, in machine barrel, the sealing surface of revealing is sealed with nitrogen easily with the material blowback revealed.When needing repairing, parts such as compression spring, outer press ring are removed in dismounting, because parts such as sealing ring, inner pressure ring and outer press ring are made into the semi-ring formula, under the situation of dismantling screw axle not, can easily change seal, cleaning impurity.Repeatedly by test and research, the closed chamber of screw rod tail sealing device application special substance of the present invention, pressure ring etc., use the material of wear-resistant, corrosion-resistant, high temperature resistant, high voltage bearing polytetrafluoroethylene (PTFE) aramid fiber as sealing ring, and add nitrogen rotary seal face is purged with lubricated, rotary seal face is revealed with etching problem thoroughly solved, make traditional plastic processing that tremendous change take place, effect is remarkable, stop to reveal, reduce corrosion, increase the service life.
Four, description of drawings
Fig. 1 is a structural representation of the present invention.
Five, the specific embodiment
Sealing device for extrusion machine screw rod tail as shown in Figure 1, screw rod 7 afterbodys are equipped with closed chamber 1 and polytetrafluoroethylene (PTFE) aramid fiber sealing ring 4, semi-ring formula split outer press ring 5 is connected by bolt 8 with closed chamber, suit compression spring 2 and by hold-down nut 3 location on the bolt, sealing ring 4 is contained between closed chamber and the screw rod, semi-ring formula inner pressure ring 6 also is housed between closed chamber and the screw rod, fill nitrogen in the closed chamber, nitrogen pipeline is by bolt inner chamber communication seals chambers 8, a nitrogen part is returned along the loop, and a part of blowback forms nitrogen-sealed in reinforced machine barrel.
Closed chamber at first is installed, semi-ring formula inner pressure ring is installed, the PTFE sealing ring is installed, semi-ring formula outer press ring is installed, the equalizing pressure spring is installed, hold-down nut connects and imports and exports nitrogen pipeline.
Claims (4)
1. sealing device for extrusion machine screw rod tail, screw rod tail is set with closed chamber (1) and sealing ring (4), it is characterized in that: outer press ring (5) is connected by bolt (8) with closed chamber (1), suit compression spring (2) on the bolt, fill sealing gas in the closed chamber, described sealing ring is a semi-ring formula sealing ring, sealing gas is a nitrogen, nitrogen is as the lubricant and the cooling agent of encapsulant and rotating shaft, nitrogen is by the interior communication seals of bolt (8) chamber, a nitrogen part is returned along the loop, and a part of blowback forms nitrogen-sealed in reinforced machine barrel, inner pressure ring (6) is housed between closed chamber and the screw rod.
2. sealing device for extrusion machine screw rod tail according to claim 1 is characterized in that: sealing ring (4) is a teflon seal ring.
3. sealing device for extrusion machine screw rod tail according to claim 1 is characterized in that: outer press ring (5) is a semi-ring formula split outer press ring.
4. sealing device for extrusion machine screw rod tail according to claim 1 is characterized in that: inner pressure ring (6) is a semi-ring formula split inner pressure ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100105506A CN101234526B (en) | 2008-03-05 | 2008-03-05 | Sealing device for extrusion machine screw rod tail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100105506A CN101234526B (en) | 2008-03-05 | 2008-03-05 | Sealing device for extrusion machine screw rod tail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101234526A CN101234526A (en) | 2008-08-06 |
| CN101234526B true CN101234526B (en) | 2011-03-16 |
Family
ID=39918548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100105506A Active CN101234526B (en) | 2008-03-05 | 2008-03-05 | Sealing device for extrusion machine screw rod tail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101234526B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994223A (en) * | 2014-05-05 | 2014-08-20 | 王敏 | Screw shaft sealing structure |
| CN103939614A (en) * | 2014-05-06 | 2014-07-23 | 王敏 | Screw shaft sealing device |
| CN104913068B (en) * | 2015-05-28 | 2017-04-12 | 哈尔滨工业大学 | High-low-temperature box penetrating shaft gas sealing device and application |
| CN107859742B (en) * | 2017-12-21 | 2024-06-11 | 广东星联科技有限公司 | Sealing ring structure and extruder applying same |
| CN107859747B (en) * | 2017-12-21 | 2023-12-15 | 广东星联科技有限公司 | Extruder adopting dynamic sealing structure |
| CN117863497B (en) * | 2024-02-29 | 2024-09-17 | 无锡中油瑞德防腐科技有限公司 | Equipment for preparing polyethylene coating with steel bent pipe winding three-layer structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109414A (en) * | 1985-01-03 | 1986-08-27 | 彻斯特顿公司 | Open the fraction mechanical end face seal |
| CN2430579Y (en) * | 1999-12-14 | 2001-05-16 | 李旭 | Combined seal ring structure |
| CN2458463Y (en) * | 2000-06-05 | 2001-11-07 | 江苏正昌集团有限公司 | Axial sealer for mixer |
| CN2602220Y (en) * | 2003-01-28 | 2004-02-04 | 上海申威达机械有限公司 | Bolt sealing arrangement of double screw extrusion machine |
| CN2802235Y (en) * | 2005-05-24 | 2006-08-02 | 沈向东 | Self-adjusting sealing rotary compensator |
| CN2868648Y (en) * | 2005-08-16 | 2007-02-14 | 华南理工大学 | Sealing structure of screw of verticle extruder |
-
2008
- 2008-03-05 CN CN2008100105506A patent/CN101234526B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85109414A (en) * | 1985-01-03 | 1986-08-27 | 彻斯特顿公司 | Open the fraction mechanical end face seal |
| CN2430579Y (en) * | 1999-12-14 | 2001-05-16 | 李旭 | Combined seal ring structure |
| CN2458463Y (en) * | 2000-06-05 | 2001-11-07 | 江苏正昌集团有限公司 | Axial sealer for mixer |
| CN2602220Y (en) * | 2003-01-28 | 2004-02-04 | 上海申威达机械有限公司 | Bolt sealing arrangement of double screw extrusion machine |
| CN2802235Y (en) * | 2005-05-24 | 2006-08-02 | 沈向东 | Self-adjusting sealing rotary compensator |
| CN2868648Y (en) * | 2005-08-16 | 2007-02-14 | 华南理工大学 | Sealing structure of screw of verticle extruder |
Non-Patent Citations (2)
| Title |
|---|
| 杨国全 等.螺杆轴密封装置的改进措施.林业机械与木工设备34 6.2006,34(6),53-54. |
| 杨国全等.螺杆轴密封装置的改进措施.林业机械与木工设备34 6.2006,34(6),53-54. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101234526A (en) | 2008-08-06 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20161223 Address after: 116036 Ganjingzi Province, Dalian District, Hui Road, No. 18, Patentee after: Dalian Rubber Plastic Machinery Co., Ltd. Address before: 116033 Liaoning city of Dalian province Zhoushuizi Plaza on the 1st Patentee before: Dalian Rubber & Plastics Machinery Co., Ltd. |