CN2688483Y - Apparatus for producing radial and axial drawing plastic pipes - Google Patents
Apparatus for producing radial and axial drawing plastic pipes Download PDFInfo
- Publication number
- CN2688483Y CN2688483Y CN 200420034428 CN200420034428U CN2688483Y CN 2688483 Y CN2688483 Y CN 2688483Y CN 200420034428 CN200420034428 CN 200420034428 CN 200420034428 U CN200420034428 U CN 200420034428U CN 2688483 Y CN2688483 Y CN 2688483Y
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- radially
- pipe
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- footpath
- tension
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- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The utility model provides an apparatus for producing radial and axial drawing plastic pipes, which comprises at least one plastic extruder, an extrusion-pipe die head with at least one flow passage, a sizing cover and a cooling tank. The four members are arranged successively. The apparatus for producing radial and axial drawing plastic pipes is characterized in that an enlarged and pulled mechanism of the pipe is installed, the enlarged and pulled mechanism of the pipe comprises at least a set of magnetic outer rings or the steel rings positioned out of the wall of the plastics pipe, at least a set of radial enlarged and pulled magnetic plungers or the steel plungers with the opposite magnetism to the magnetism of the magnetic outer rings, a hollow pipe for the delivery of the pressure air, a heating case and a traction mechanism, wherein, the traction mechanism comprises a traction machine of the tube blank and/or a stretching traction machine, the radial enlarged and pulled magnetic plungers or the steel plungers is positioned in the wall of the plastics pipe, and the outer diameters of the radial enlarged and pulled magnetic plungers or the steel plungers are 0.4-11 times longer than the inner diameter of the blank tube extruded from the die head. The apparatus for producing radial and axial drawing plastic pipes has the advantages of simple structure and high production efficiency.
Description
Technical field:
The utility model with make footpath, axle biaxial tension or radially the simple tension plastic tube is relevant, special with expand the machine drawing structure with being positioned at least one group of magnetic outer shroud or steel loop outside the plastic pipe wall, being positioned at least one group of plastic pipe wall and radially expanding and draw the device of magnetic plunger or steel column plug production stretched plastic tubing relevant.
Background technology:
There are the people of general professional knowledge to know, crystallinity high polymer such as polypropylene, polyethylene, polystyrene, materials such as polyamide, it is below the viscous state temperature, the glassy state temperature is above to make its big molecular orientation arrangement can obtain tensile strength than high several times of elongated article not even ten times through unidirectional or biaxial tension, people utilize this crystalline polymer properties of materials to invent unidirectional and biaxial stretching film, utilize this characteristic to invent the plastic tube of radially simple tension or radial and axial biaxial tension orientation, load performance in these plastic tubes have better than the general not plastic tube of stretch orientation, heat resistance, barrier property, people have invented many manufacture methods or device around the plastic tube of stretch orientation, particularly make the plastic tube of radial drawing orientation, dilate as machinery, gas-liquid dilates, the inflation cloth bag dilates etc., and all place that a long end is fixed on the extrusion die and the other end is fixed on envelope gas column plug or machinery and dilates the stay cord on device or the inflation cloth bag or the pipe of gassy fluid in that tubing is inner in the manufacture method of all known biaxial tension plastic tubes or the device, complex structure, inconvenient operation, tubing percent defective height.
The utility model content:
The purpose of this utility model is for a kind of control tubing dimensional accuracy height is provided, and drawing process is easy to control, can improve the manufacturing footpath, axle biaxial tension of stretching size of pipe and tubing and surface quality or the device of simple tension plastic tube radially.
The purpose of this utility model is achieved like this:
The utility model manufacturing footpath, the axle biaxial tension or the device of simple tension plastic tube radially, comprise at least one the plastic extruder that is arranged in order, the extruding pipe die head that contains at least one runner, calibration sleeve, cooler bin, it is characterized in that being provided with in the device expansion machine drawing structure of pipe, the expansion machine drawing structure of pipe comprises and is positioned at least one group of outer magnetic outer shroud of plastic pipe wall or steel loop, at least one group of external diameter that is positioned at the plastic pipe wall draws magnetic plunger or steel column plug greater than the embryonic tube internal diameter 0.3-10 that extrudes from die head times and radially expansion that magnetic is opposite with the magnetic outer shroud, heating cabinet and haulage gear, haulage gear comprises pipe hauling machine and/or stretching and drawing machine, magnetic all is installed (if S utmost point magnetic is installed in the tubing wall inside and outside the plastic pipe wall, then the tubing wall is installed N utmost point magnetic outward, so that by the mutual absorption affinity in the two poles of the earth the radially expansion stay column plug of installing in the tubing wall is fixed the position), can increase magnetic force, if on tubing wall internal and external circumference, evenly distribute several groups of magnetics, can make the radially expansion stay column plug suspension of installing in the tubing wall and fix the position, the expander better effects if. when the embryonic tube of extruding from die head after cooler bin cooling, under the haulage gear traction, reheat below the viscous state temperature through heating cabinet, more than the glassy state temperature, expansion machine drawing structure by pipe carries out the footpath to embryonic tube, axle biaxial tension or radially simple tension, radially simple tension draws magnetic plunger or steel column plug to finish by at least one group of external diameter that is positioned at the plastic pipe wall greater than the embryonic tube internal diameter 0.3-10 that extrudes from die head radially expansion doubly, directly, the axle biaxial tension then draws magnetic plunger or steel column plug and stretching and drawing machine to finish jointly by radially expanding, adjust the axial tensile rate of pipe by adjusting linear velocity between pipe hauling machine and roller hauling machine or stretching and drawing machine, make it reach the axial tensile rate of design.
Above-mentioned magnetic outer shroud or radially expand to draw and contain a permanent magnetism gonosome or electromagnetism gonosome in the magnetic plunger at least, the electromagnetism gonosome will connect power supply, but magnetic force is big and reliable, and the permanent magnetism body structure is simple.
Above-mentioned at least one group of being positioned at the plastic pipe wall radially expands and draws magnetic plunger or steel column to be plugged with the hollow-core construction of weight reduction, just can fix the position so that expand the stay column plug with less magnetic force.
Above-mentioned at least one group of being positioned at the plastic pipe wall radially expands and draws magnetic plunger or steel column to be plugged with the little polymeric seal circle of temperature resistant rubber or heatproof and smooth surface coefficient of friction, to increase gas sealing ability.
Above-mentioned at least one group of being positioned at the plastic pipe wall radially expands and draws magnetic plunger or steel column plug end to help tubing radially to expand smooth taper or the semicircle spherical structure that draws, reduces enhanced stretch resistance, when the tubing expansion is drawn, particularly radially during the simple tension plastic tube, pipe diameter will enlarge several times, carry out although expansion trombone slide material reheats under the draft temperature condition after the embryonic tube cooling again, its axial resistance is still bigger.
The inflatable body that the expansion pulling shaping that is beneficial to pipe that is connected with the extruding pipe die head is arranged in the above-mentioned device, increase tubing expand pulling shaping particularly radially during the simple tension plastic tube to tubing auxiliary force from inside to outside, the tubing that also helps simultaneously expanding behind the pulling shaping is close to outer calibration sleeve assurance tube outer diameter dimensional accuracy height, smooth outer surface.
Above-mentioned inflatable body is the hollow gas blow pipe of feeds air under pressure.
Drawing in the above-mentioned device has heat treatment to shrink shaping box after expanding the machine drawing structure, the heating arrangements that has the tubing after pair expansion is drawn to carry out the heat shrink typing in the case.
Draw in the above-mentioned device after expanding the machine drawing structure cooler bin is arranged, there is tubing after pair expansion is drawn to cool off the outer calibration sleeve of sizing in the case, the outer calibration sleeve of the cooling of expanding trombone slide is set in the cooler bin, tubing behind the expansion pulling shaping carries out cooling and shaping in the calibration sleeve outside cooling handles, cooler bin that utilization is set up and the pipe of the outer calibration sleeve of cooling after expansion is drawn are carried out cooling, and carry out the cooling and shaping processing at the outer calibration sleeve place of cooling and tubing is reached design outside dimension and smooth outer surface.
Water or air cooling mechanism are arranged in the cooler bin in the above-mentioned device, general plastic pipe is expanded pulling shaping, no matter be embryonic tube is cooled off or the tubing that expands behind the pulling shaping is carried out cooling processing, can adopt cooling effect water cooling preferably, but for better hear resistance and calorific intensity are arranged than common polythene pipeline, heat-resistant aging, the silane crosslinked polyethylene pipe of environmental stress crack resistance performance particularly expands pulling shaping to the crosslinkable silane polyethylene body of the polycondensation reaction that is not hydrolyzed, just can not adopt water cooling, and can only adopt air cooling, otherwise before expanding pulling shaping or among the crosslinked with silicane reaction that produces will influence the expansion pulling shaping, owing to adopt air cooling, cooling effect is bad, cooling velocity is slow, internal surface of pipe can not get abundant cooling when particularly producing fast, influence pipe internal diameter precision and inner surface quality, and adopt the utility model device can solve this difficult point effectively, utilize " at least one group of external diameter that is positioned at the plastic pipe wall draws magnetic plunger or steel column plug greater than the embryonic tube internal diameter 0.3-10 that extrudes from die head radially expansion doubly " in the utility model device, be placed in internal surface of pipe and be cooled to a certain degree position, with magnetic plunger or steel column plug internal surface of pipe is cooled off sizing, it is smooth to make tubing reach design internal diameter size and inner surface.
The utility model device control tubing dimensional accuracy is good, the production efficiency height, and the inside and outside easy temperature control system of tubing, drawing process is easy to control, can improve the quality on stretching tubing and surface.The utility model device low cost of manufacture, simple in structure, be fit to the production of all size pipeline.
Description of drawings:
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model band inflatable body structural representation.
Fig. 3 draws magnetic plunger and envelope gas column plug for band in the in addition many group magnetic of the utility model tubing wall outer shroud, the tubing wall radially expands, replace water-cooled and water to heat the crosslinkable silane polyethylene body that is exclusively used in the polycondensation reaction that is not hydrolyzed with air-cooled and electrical heating expands the pulling shaping structural representation.
Fig. 4 is the A-A cutaway view among Fig. 3.
Fig. 5 is the B-B cutaway view among Fig. 3.
The specific embodiment:
Embodiment 1:
Referring to Fig. 1, Fig. 1 has provided the utility model device embodiment 1 figure.Comprise the plastic extruder 1 that is arranged in order, the extruding pipe die head 2 that a runner (or a plurality of runner) arranged, in cooler bin 4 to the outer calibration sleeve 3 of embryonic tube 6 sizings is housed, expand the embryonic tube hauling machine 5 in the machine drawing structure, embryonic tube reheats the oven heat (or boiler or hot solvent case) 7 of usefulness, magnetic plunger (or steel column plug) 8 is drawn in the radially expansion of being fixed the position by the absorption of the magnetic force of magnetic outer shroud (or steel loop) 9 of expanding in the machine drawing structure, sizing case 24 is shunk in heat treatment, the cooler bin 12 that contains outer calibration sleeve 11, stretching and drawing machine 14.Having expanded the tubing 10 that pulls into shape is loaded on heat treatment and shrinks heater 24 in the shaping box 23 and shrink typing and handle, then calibration sleeve 11 cools off sizing processing outside the quilt among cooler bin 12, the support roller (or carrying roller) 13 that expands trombone slide 10 is housed among the cooler bin 12, and 14 pairs of tubing of stretching and drawing machine carry out axial tension.
Extruder 1 is with plastic raw materials such as nylon 6 (or nylon 66 or polypropylene or polyethylene) fusion, by extruding pipe die head 2 extrusion plastic cast bases 6, cast base 6 enters the cooler bin 4 of the cool water shower that vacuumizes, effect because of vacuumizing in cooler bin, the cast base is cooled off under the situation of sizing by calibration sleeve 3, cooling water temperature can be adjusted, adjust the cooldown rate of cast base with this, make the pipe cooling and shaping, embryonic tube reheats below the viscous state temperature in oven heat (or boiler or hot solvent case) 7, more than the glassy state temperature, draw greater than the embryonic tube internal diameter 0.3-10 that extrudes from die head radially expansion doubly under magnetic plunger or 8 effects of steel column plug at external diameter, embryonic tube is carried out radial drawing, the outer calibration sleeve 11 that tubing 10 after the stretching is loaded among the cooler bin 12 cools off sizing processing, and footpath, back drawing mechanism 14 is said.If the speed of stretching and drawing machine 14 greater than the speed of embryonic tube hauling machine 5, then can be carried out footpath, axle biaxial tension to embryonic tube.
Embodiment 2:
Fig. 2 has provided the utility model device embodiment 2 figure.Present embodiment 2 devices are basic and embodiment 1 is same, and not existing together is to be provided with roller hauling machine 15 at cooler bin 12 and 14 in stretching and drawing machine, is provided with the hollow gas blow pipe 16 of discharge pressure gas on the extruding pipe die head.Pneumatic pipe cleaner is crossed radially and to be expanded the air-vent 17 that draws in the magnetic plunger (or steel column plug) 8 and enter in the stretching tube 10 in the cooler bin 12, because of being compressed by roller hauling machine 15, inside pipe wall plays the sealing ponding, sizing tube 11 inner surfaces were realized the outer sizing of tubing outside tubing was close under air pressure, to satisfy the requirement of tube outer diameter dimensional accuracy height, smooth outer surface.Present embodiment can also be sent into after the pressed gas heating of pipe material inner wall sending into and circulate, and expands La Wendu to increase, and keeps the fixed expansion brace members of weighing apparatus.
Embodiment 3:
Fig. 3, Fig. 5 have provided the utility model device embodiment 3 figure.Present embodiment 3 devices are basic and embodiment 2 is same, do not exist together is that roller hauling machine 15 is replaced by many group magnetic outer shrouds (or steel loop) 9, the many groups front end that is positioned at the plastic pipe wall has the magnetic envelope gas column plug (or steel column plug) 19 of polymeric seal circle 18, cooling water tank 4 and 12 changes air cooling case or cooling water and coolant jacket into and isolates tubing and the discontiguous water-cooled case 20 of water and 22, boiler (or hot solvent case) 7 changes electrical heating case 21 into, hair-dryer 26 and heating plate 25 are arranged in the electrical heating case 21, present embodiment 3 is specially adapted to the crosslinkable silane polyethylene body of the polycondensation reaction that is not hydrolyzed is expanded pulling shaping, just more important for reheating this device of silane crosslinked polyethylene pipes that carries out biaxial tension to pipe, because of to the crosslinked with silicane pipe heat with biaxial tension before, do not allow extruding pipe draw at when cooling and water touches as far as possible, otherwise just produce crosslinked inconvenience and heat back biaxial tension and the big molecular orientation of generation again because of contact with hydrone at this moment, best crosslinked with silicane tubing is exactly crosslinkedly again after the biaxial tension to be only best silane biaxial tension tubing.In present embodiment 3 device magnetic envelope gas column plug or steel column plug 19 be well in sizing tool, can cool off sizing processing to the internal diameter sizing internal surface of pipe that has certain requirements, make tubing reach the design internal diameter size and inner surface smooth.
As shown in Figure 4, outside the tubing wall, be provided with to be provided with in many group magnetic outer shrouds 9, the tubing wall how the group magnetic are sealed gas columns 9.
As shown in Figure 5, outside the tubing wall, there are many groups to be easy to have in the Kraft 27 of detachable magnetic outer shroud 9, the tubing wall many group magnetic envelope gas column plug structures 8.
Claims (10)
1, make the footpath, the axle biaxial tension or the device of simple tension plastic tube radially, comprise at least one the plastic extruder that is arranged in order, the extruding pipe die head that contains at least one runner, calibration sleeve, cooler bin, it is characterized in that being provided with in the device expansion machine drawing structure of pipe, the expansion machine drawing structure of pipe is by being positioned at least one group of outer magnetic outer shroud of plastic pipe wall or steel loop, at least one group of external diameter that is positioned at the plastic pipe wall draws magnetic plunger or steel column plug greater than the embryonic tube internal diameter 0.3-10 that extrudes from die head times and radially expansion that magnetic is opposite with the magnetic outer shroud, heating cabinet and haulage gear, haulage gear comprise pipe hauling machine and/or stretching and drawing machine.
2, manufacturing as claimed in claim 1 footpath, axle biaxial tension or the radially device of simple tension plastic tube is characterized in that the magnetic outer shroud or radially expand to draw containing a permanent magnetism gonosome or electromagnetism gonosome in the magnetic plunger at least.
3, manufacturing as claimed in claim 1 or 2 footpath, axle biaxial tension or the radially device of simple tension plastic tube is characterized in that being positioned at least one group of plastic pipe wall and radially expand and draw magnetic plunger or steel column to be plugged with the hollow-core construction of weight reduction.
4, manufacturing as claimed in claim 1 or 2 footpath, axle biaxial tension or the radially device of simple tension plastic tube is characterized in that being positioned at least one group of plastic pipe wall and radially expand and draw magnetic plunger or steel column to be plugged with also ganoid polymeric seal circle of temperature resistant rubber or heatproof.
5, manufacturing as claimed in claim 1 or 2 footpath, axle biaxial tension or the radially device of simple tension plastic tube is characterized in that being positioned at least one group of plastic pipe wall and radially expand and draw magnetic plunger or steel column plug end to help tubing radially to expand smooth taper or the semicircle spherical structure that draws, reduces enhanced stretch resistance.
6, manufacturing as claimed in claim 1 or 2 footpath, axle biaxial tension or the radially device of simple tension plastic tube is characterized in that having in the device inflatable body of the expansion pulling shaping that is beneficial to pipe of the conveying hot gas that is connected with the extruding pipe die head or cold air.
7, manufacturing as claimed in claim 6 footpath, axle biaxial tension or the radially device of simple tension plastic tube is characterized in that inflatable body is the hollow gas blow pipe of feeds air under pressure.
8, manufacturing as claimed in claim 1 or 2 footpath, axle biaxial tension or the radially device of simple tension plastic tube, there is heat treatment to shrink shaping box after it is characterized in that being positioned in the device expansion machine drawing structure, the heating arrangements that has the tubing after pair expansion is drawn to carry out the heat shrink typing in the case.
9, manufacturing as claimed in claim 1 or 2 footpath, axle biaxial tension or the radially device of simple tension plastic tube is characterized in that having in the device being positioned at the cooler bin that expands behind the machine drawing structure, have tubing after pair expansion is drawn to cool off the outer calibration sleeve of sizing in the case.
10, manufacturing as claimed in claim 9 footpath, axle biaxial tension or the radially device of simple tension plastic tube is characterized in that having in the cooler bin water or air cooling mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420034428 CN2688483Y (en) | 2004-04-20 | 2004-04-20 | Apparatus for producing radial and axial drawing plastic pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420034428 CN2688483Y (en) | 2004-04-20 | 2004-04-20 | Apparatus for producing radial and axial drawing plastic pipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2688483Y true CN2688483Y (en) | 2005-03-30 |
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ID=34670819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420034428 Expired - Fee Related CN2688483Y (en) | 2004-04-20 | 2004-04-20 | Apparatus for producing radial and axial drawing plastic pipes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2688483Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102791467A (en) * | 2009-10-19 | 2012-11-21 | 霍普曼国际有限公司 | Methods and devices for manufacturing biaxially oriented tubing |
| CN103171144A (en) * | 2011-12-21 | 2013-06-26 | 福建亚通新材料科技股份有限公司 | Biaxial orientation plastic tube manufacturing method and apparatus |
| CN103395183A (en) * | 2013-07-26 | 2013-11-20 | 鹤山市塑协塑料加工技术研究所有限公司 | Manufacturing equipment and production process and method of biaxial orientation PVC (Poly Vinyl Chloride) and polyolefin material pipe |
| CN105014941A (en) * | 2015-09-02 | 2015-11-04 | 山东理工大学 | PVC-O (oriented polyvinyl chloride) pipe magnetic suction controlled radial stretching device and processing method thereof |
| CN105599314A (en) * | 2015-12-28 | 2016-05-25 | 山东华信塑胶股份有限公司 | Continuous forming device of biaxial orientation polyvinyl chloride pipe and operating method |
| CN105965903A (en) * | 2016-05-05 | 2016-09-28 | 日丰企业集团有限公司 | Novel prefabricated directly-buried thermal insulation PPR complex pipeline and production method thereof |
| CN108177330A (en) * | 2017-12-19 | 2018-06-19 | 山东柏远复合材料科技有限公司 | A kind of differential method tubing radial drawing device and method |
| CN112461392A (en) * | 2020-12-04 | 2021-03-09 | 中国科学院力学研究所 | Progressive manufacturing method of coaxial thermocouple transient heat flow sensor |
| CN115027044A (en) * | 2022-06-21 | 2022-09-09 | 临海伟星新型建材有限公司 | Bidirectional stretching orientation enhancing device and method for pipe |
-
2004
- 2004-04-20 CN CN 200420034428 patent/CN2688483Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105172116B (en) * | 2009-10-19 | 2018-06-15 | 霍普曼国际有限公司 | For manufacturing the method and apparatus of biaxially oriented pipe |
| CN102791467B (en) * | 2009-10-19 | 2015-08-19 | 霍普曼国际有限公司 | For the manufacture of the method and apparatus of biaxially oriented pipe |
| CN102791467A (en) * | 2009-10-19 | 2012-11-21 | 霍普曼国际有限公司 | Methods and devices for manufacturing biaxially oriented tubing |
| CN105172116A (en) * | 2009-10-19 | 2015-12-23 | 霍普曼国际有限公司 | Methods and devices for manufacturing biaxially oriented tubing |
| CN103171144A (en) * | 2011-12-21 | 2013-06-26 | 福建亚通新材料科技股份有限公司 | Biaxial orientation plastic tube manufacturing method and apparatus |
| CN103395183A (en) * | 2013-07-26 | 2013-11-20 | 鹤山市塑协塑料加工技术研究所有限公司 | Manufacturing equipment and production process and method of biaxial orientation PVC (Poly Vinyl Chloride) and polyolefin material pipe |
| CN105014941B (en) * | 2015-09-02 | 2017-08-01 | 山东理工大学 | A kind of PVC O tubing magnetic control radial drawing device and its processing method |
| CN105014941A (en) * | 2015-09-02 | 2015-11-04 | 山东理工大学 | PVC-O (oriented polyvinyl chloride) pipe magnetic suction controlled radial stretching device and processing method thereof |
| CN105599314A (en) * | 2015-12-28 | 2016-05-25 | 山东华信塑胶股份有限公司 | Continuous forming device of biaxial orientation polyvinyl chloride pipe and operating method |
| CN105965903A (en) * | 2016-05-05 | 2016-09-28 | 日丰企业集团有限公司 | Novel prefabricated directly-buried thermal insulation PPR complex pipeline and production method thereof |
| CN108177330A (en) * | 2017-12-19 | 2018-06-19 | 山东柏远复合材料科技有限公司 | A kind of differential method tubing radial drawing device and method |
| CN108177330B (en) * | 2017-12-19 | 2019-11-26 | 山东柏远复合材料科技有限公司 | A kind of differential method tubing radial drawing device and method |
| CN112461392A (en) * | 2020-12-04 | 2021-03-09 | 中国科学院力学研究所 | Progressive manufacturing method of coaxial thermocouple transient heat flow sensor |
| CN115027044A (en) * | 2022-06-21 | 2022-09-09 | 临海伟星新型建材有限公司 | Bidirectional stretching orientation enhancing device and method for pipe |
| CN115027044B (en) * | 2022-06-21 | 2023-07-11 | 临海伟星新型建材有限公司 | Device and method for reinforcing biaxial stretching orientation of pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050330 Termination date: 20120420 |