CN1155464C - Method and apparatus for making radial-axial bidirectinal streth or axial single direction stretch plastic pipe - Google Patents
Method and apparatus for making radial-axial bidirectinal streth or axial single direction stretch plastic pipe Download PDFInfo
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- CN1155464C CN1155464C CNB011070064A CN01107006A CN1155464C CN 1155464 C CN1155464 C CN 1155464C CN B011070064 A CNB011070064 A CN B011070064A CN 01107006 A CN01107006 A CN 01107006A CN 1155464 C CN1155464 C CN 1155464C
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- pipe
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- trombone slide
- expansion
- calibration sleeve
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Abstract
The present invention provides a method for manufacturing a radial and axial bidirectional stretched plastic pipe or a radial unidirectional stretched plastic pipe, which comprises the following steps: using an extruder to melt plastics and extrude the plastics through a die head of an extruding pipe to form a plastic pipe blank of the pipe wall, and cooling and forming to obtain the pipe blank; when the temperature of the pipe blank reaches the temperature required for stretching technology, feeding pressure liquid and/or gas into the interior of the pipe blank by a hollow pipe which is positioned inside the pipe blank and communicated with the die head of the extruding pipe, and then applying pressure to the inner wall of the pipe blank by fed fluid from the interior under the sealing and blocking action formed among the inner wall of the pipe blank, the inner wall of an expanding-stretching pipe and a sealing plug connected with the hollow pipe and/or the fluid sealing and blocking action formed by tightly pressing the inner wall of the pipe blank and the inner wall of the expanding-stretching pipe by a press roller type drawing machine. The fed fluid exerts pressure on the inner wall of the pipe blank from the interior, and the pipe blank is expanded and stretched in the radial and axial bidirection or the radial unidirection to form stretched plastic pipe. The present invention also provides a device for manufacturing the plastic pipe.
Description
Technical field:
What the present invention relates to is a kind ofly to utilize pressure liquid (the stream body expands trombone slide manufacturing footpath, axle biaxial tension or the radially method and the device of simple tension plastic tube.
Background technology:
The method or the device of known biaxial tension plastic tube have WO93/19924, DE2357210, EP0441142.These three kinds of methods all are to adopt in expanding trombone slide the taper mandrel is set, and utilize the outside dimension of taper mandrel roughly to determine the ips size.One of them: expand and to draw after cool off (or freezing) pipe and shrink a bit naturally, thereby obtain final caliber size.This kind method control caliber size capability is relatively poor, and pipe deformation is big, and circularity is poor.Second method is that the on-gauge plate with prover after expansion is drawn shrinks the tube exterior specification that obtains expecting gradually to pipe.Its weakness is can cause damage to the biaxial tension of pipe plastics in calibration process.The third method is at the tapered core shaft rear end, utilize spray graceful spectral detection---a kind of molecularly oriented measure, when laser beam knocks tubing, have a light wave corresponding to the Raman light spectral line at least by the tubing radiation, with the intensity of being surveyed, instant heating plastic molecules stretching actual value input computer, compare with preset value, poor according to two-value, the various parameters of control valve subset operation, with reach control pipe molecule axially or the radial drawing degree.The method input cost height, complicated operation can not strict control pipe sizing.
Summary of the invention:
In view of above reason, the objective of the invention is for a kind of control tubing dimensional accuracy height is provided, the tubing internal and external temperature is easy to control, and drawing process is easy to control, can guarantee the manufacturing footpath, axle biaxial tension of stretching quality or the method for simple tension plastic tube radially.Another object of the present invention is for the low manufacturing of a kind of device fabrication cost footpath, axle biaxial tension or the device of simple tension plastic tube radially are provided.
The object of the present invention is achieved like this:
The present invention makes the footpath, the axle biaxial tension or the method for simple tension plastic tube radially, comprise with at least one extruder molten plastic and by extrude one deck plastics at least by the extruding pipe die head of at least one runner and form the plastic tube parison of tube wall, after calibration sleeve and cooler bin typing cooling, obtain pipe, when the pipe temperature reaches the drawing process temperature, hollow pipe by the pipe inside that is communicated with the extruding pipe die head is sent into pressure fluid and/or gas to pipe inside, because of the pipe inwall with expand the ponding that seals between trombone slide inwall and the sealing-plug that hollow pipe is connected and/or the roller hauling machine compresses the pipe inwall and the expansion trombone slide seals ponding, the fluid of sending into is exerted pressure to the pipe inwall internally, it is carried out radially, axially two-way or radially unidirectional expansion is drawn, form the stretched plastic pipe, it is characterized in that in heating cabinet, being provided with the outer calibration sleeve that expands trombone slide, the pipe of cooling and shaping heated again reach the drawing process temperature, when expansion is drawn to pipe, by the outer calibration sleeve that expands trombone slide to its external diameter sizing, when expansion is drawn to pipe, the external diameter of stretching tube can not freely change, but by the outer calibration sleeve of the expansion trombone slide of heating cabinet (device) to expanding trombone slide external diameter sizing, can change the calibration sleeve dimensions of expander according to the radial drawing ratio of design, calibration sleeve outside the cooling of expanding trombone slide is set in cooler bin, carrying out cooling and shaping outside cooling in the calibration sleeve 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 pipe is reached design the sizing size.
Above-mentioned method is to adjust the axial tensile rate of pipe by the linear velocity between adjustment pipe hauling machine and roller hauling machine or stretching and drawing machine, makes it reach the axial tensile rate of design.
Above-mentioned method is to be provided with to cut open the pipe device before the pipe hauling machine, behind the stretching and drawing machine, be provided with and cut open the pipe device, conveniently cut plastic tube open, play sealing function, can make cylinder type stretched plastic pipe so that start manufacturing and installation sealing-plug make it cooperate with pipe inwall and expansion trombone slide inwall.
The present invention makes the footpath, the axle biaxial tension or the device of simple tension plastic tube radially, comprise at least one plastic extruder, the extruding pipe die head that contains at least one runner, calibration sleeve, cooling tube, the expansion machine drawing structure of pipe, haulage gear, pressure liquid and/or gas conveying mechanism, the expansion machine drawing structure that it is characterized in that pipe is by the hollow pipe of discharge pressure liquid and/or gaseous fluid and be loaded on the hollow pipe or the sealing-plug that is attached thereto is formed with at least one group of roller hauling machine that contains at least one pair of pressure roller and/or pipe hauling machine, haulage gear comprises pipe hauling machine and/or stretching and drawing machine, having heaters in the device, have in the heater and expand the external diameter of the outer calibration sleeve of trombone slide, cooler bin is arranged in the device, the outer calibration sleeve of the cooling of expanding trombone slide is arranged in the cooler bin heating of pipe blank and control expansion trombone slide.
Cut open the pipe device before the above-mentioned pipe hauling machine, cut open the pipe device behind the stretching and drawing machine.
Above-mentioned pressure liquid and/or gas conveying mechanism comprise by hollow pipe and logical pressure liquid and/or the gas conveyer of extruding pipe die head.
The inventive method will be extruded the plastic tube that cooling and shaping obtains, when meeting the drawing process condition, in pipe, send into pressure fluid and/or air fluid, pipe is exerted pressure internally and reach the two-way or radial drawing plastic tube of the pull-shaped one-tenth of two-way or radially unidirectional expansion by pressure fluid or air fluid.
Adopt the inventive method control tubing dimensional accuracy good, the production efficiency height, the tubing internal and external temperature is easy to control, and drawing process is easy to control, and the stretching quality can ensure.Apparatus of the present invention low cost of manufacture.
Description of drawings:
Fig. 1 is apparatus of the present invention embodiment 1 figure.
Fig. 2 is apparatus of the present invention embodiment 2 figure.
Fig. 3 is apparatus of the present invention embodiment 3 figure.
The specific embodiment:
Embodiment 1:
Fig. 1 has provided apparatus of the present invention embodiment 1 figure.Comprise that agent goes out machine 1, the extruding pipe die head 2 that at least one runner is arranged, in the cooler bin 4 of calibration sleeve 3 is housed, pressure fluid that is communicated with the extruding pipe die head and gas hollow metal tube 5, be contained in the sealing-plug 6 on pressure fluid and the gas hollow metal tube 5, expand trombone slide 11, be loaded on the expander calibration sleeve 10, the pipe cooling sizing tube 13 that expand trombone slide 11 peripheries, roller hauling machine 14.Liquid letter shoot 23 1 ends are contained on the extruding pipe die head and are communicated with pressure fluid and gas hollow metal tube and the other end is communicated with pressure fluid and pneumatic carrier conveyor 22.
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 21, the cast base 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 but preferably be in the temperature that to be stretched, pipe 8 inwalls behind the cooling and shaping are equipped with the sealing-plug 6 that silastic material is made, the sealing plug is loaded on the pressure liquid and/or tracheae 5 that is communicated with the extruding pipe die head, this pipe is hollow metal tube, be communicated with by extruding pipe die head and extraneous pressure liquid and/or gas conveying mechanism conveyer 22 and carrier pipe 23, pressure according to the pipe that can stretch send air or liquid such as water or oil or gas and mixtures of liquids to the pipe inwall, play the sealing ponding because of the pipe inwall is compressed by roller hauling machine 14, pressure liquid and/or gas are radially expanded tube wall to inwall generation pressure and draw.Present embodiment can also be sent into after the heating of the pressure liquid of pipe inwall and/or gas sending into and circulate, and expands La Wendu to increase, and keeps the fixed expansion brace members of weighing apparatus.
Pipe can increase at the external diameter that expands trombone slide 11 and expand trombone slide calibration sleeve 10 and cooling calibration sleeve 13 in above-mentioned drawing process, and the cooling calibration sleeve can be used air cooling, also can the trickle cooling.
Embodiment 2:
Fig. 2 has provided apparatus of the present invention embodiment 21 figure.Present embodiment 2 devices are basic and embodiment 1 is same.Not existing together is to cut open pipe device 20 before being provided with behind cooler bin, and pipe hauling machine 7 is equipped with heating cabinet 9 (as oven heat or boiler or hot melt agent case) respectively, cooler bin 12 (as packaged air conditioner or cold water storage cistern) outside expander calibration sleeve and calibration sleeve.Between cooler bin and cooling calibration sleeve, holder rod 18 is housed.Behind cooler bin, set gradually pressure roller hauling machine 14, stretching and drawing machine 15, after cut open the pipe device 19.Steel wire 16 1 ends and hydraulic pressure contract that air hose 5 is connected and the other end is connected with sealing-plug 17.
Extruder 1 molten plastic such as high density polyethylene (HDPE) are by extruding pipe die head 2 extruding pipe parisons 21, and the cast base is evacuated power in vacuum cooling tank 4 be pipe 8 at calibration sleeve 3 sizing cooling and shapings.Pipe is involved from cooler bin by pipe hauling machine 7, and hauling machine 7 can be adjusted hauling speed and adjust the wall thickness of pipe.
In order to start shooting convenient and to form the pipe of dimensionally stable, cut open the pipe device before before inside pipe wall is established sealing-plug 6, being provided with, so that tube blank size is undesirable or be broken away at this with the ill-matched pipe of sealing-plug size and do not damage sealing-plug.Pipe 8 enters heating cabinet 9 and is reheated and reach draft temperature, and the thermal source of heating cabinet 9 adopts hot blast or hot water or heated solvent.Be heated when reaching draft temperature at pipe, pressure liquid or gas conveyer 22 are sent into pressure liquid and/or gas liquid by the liquid or the letter shoot 23 that are attached thereto to pressure liquid that is communicated with the extruding pipe die head or gas hollow pipe, and the pipe that makes heating is exerted pressure and expanded and draw from inwall.Expanding the outside dimension that draws is limited by expander calibration sleeve 10, it is because the pressure roller effect of roller hauling machine 14 that pressure liquid that hollow pipe is sent into and/or gaseous fluid can produce pressure expansion trombone slide base, pressure roller compresses pipe, and inwall plays the pressure that seals ponding and set up inside pipe wall.Enter cooler bin 12 cooling and shapings after pipe is drawn by expansion, its shaping size is determined by cooling calibration sleeve 13.In order to reduce to expanding the friction of trombone slide, the bottom of the pipe behind cooling and shaping is provided with many group carrying rollers 18, after being provided with one, roller hauling machine rear cuts open pipe device 19, draw the size that reaches design code when expansion, also be that sealing-plug 17 can't accurately cooperate the internal diameter of molded expansion trombone slide to play reliable sealing to do the time spent, expand trombone slide always by after cut open the pipe device and cut open, prevent to damage sealing-plug 17.Sealing-plug 17 is to be connected with steel wire 16, and the hollow pipe that steel wire 16 is connected with the extruding pipe die head connects.After sealing-plug accurately plays ponding, stretching and drawing machine 15 has begun the effect of stretching and traction, slowly decontrol a pair of pressure roller of roller hauling machine 14 this moment again, makes stretched hauling machine expansion trombone slide afterwards return to the cartridge type specification substantially because of the effect of inner wall pressure liquid and/or gaseous fluid.
When the roller hauling machine 14 of present embodiment draws thin tubing in expansion, can use always, not decontrol pressure roller, also needn't give the stretching and drawing machine 15 tractions according to the method described above.Draw if need when expanding trombone slide, not only radially expand, also need, also adopt roller hauling machine 14 to carry out this tubing of axial tension the tubing axial tension.When present embodiment draws thicker tubing in expansion, can equally also can carry out axial tension according to aforesaid method operation to tubing.
Embodiment 3:
Fig. 3 has provided apparatus of the present invention embodiment 3 structural representations.Present embodiment 3 is basic same with embodiment 2.Do not exist together be reduced stretching and drawing machine 15 and after cut open pipe 19 and steel wire 16, increase an extruder.Present embodiment can be produced the two-layer even three-layer co-extruded composite pipe blank that goes out, choose different material coextrusion, can improve the performance of pipe and the adaptive capacity of engineering, such as internal layer nylon 6, the intermediate layer is an ionic resin, and outer is the good polyethylene of thermal welding performance.Pipe is by biaxial tension or radially after the simple tension, and what the strength ratio of nylon 6 did not stretch is high 5 to 10 times, has increased the bearing capacity of pipe greatly.Though outer field polyethylene drawn orientation, hot molten characteristic is still good, has enlarged the engineering purposes of this pipe.The method of present embodiment is identical with embodiment 2.Present embodiment also can be changed to the pressure roller hauling machine with pipe hauling machine 7, and all the other methods are identical.
Claims (6)
1, make the footpath, the axle biaxial tension or the method for simple tension plastic tube radially, comprise with at least one extruder molten plastic and by extrude one deck plastics at least by the extruding pipe die head of at least one runner and form the plastic tube parison of tube wall, after calibration sleeve and cooler bin typing cooling, obtain pipe, when the pipe temperature reaches the drawing process temperature, hollow pipe by the pipe inside that is communicated with the extruding pipe die head is sent into pressure fluid and/or gas to pipe inside, because of the pipe inwall with expand the ponding that seals between trombone slide inwall and the sealing-plug that hollow pipe is connected and/or the roller hauling machine compresses the pipe inwall and the expansion trombone slide seals ponding, the fluid of sending into is exerted pressure to the pipe inwall internally, it is carried out radially, axially two-way or radially unidirectional expansion is drawn, form the stretched plastic pipe, it is characterized in that in heating cabinet, being provided with the outer calibration sleeve that expands trombone slide, the pipe of cooling and shaping heated again reach the drawing process temperature, when expansion is drawn to pipe, by the outer calibration sleeve that expands trombone slide to its external diameter sizing, calibration sleeve outside the cooling of expanding trombone slide is set in cooler bin, outside cooling, carries out cooling and shaping in the calibration sleeve and handle.
2, manufacturing as claimed in claim 1 footpath, axle biaxial tension or the radially method of simple tension plastic tube is characterized in that adjusting the axial tensile rate of pipe by adjusting linear velocity between pipe hauling machine and roller hauling machine or stretching and drawing machine.
3, manufacturing as claimed in claim 1 footpath, axle biaxial tension or the radially method of simple tension plastic tube, it is characterized in that before the pipe hauling machine, being provided with and cut open the pipe device, behind the stretching and drawing machine, be provided with and cut open the pipe device, conveniently cut plastic tube open, so that start manufacturing and installation sealing-plug make it cooperate with pipe inwall and expansion trombone slide inwall and play sealing function, can make cylinder type stretched plastic pipe.
4, make the footpath, the axle biaxial tension or the device of simple tension plastic tube radially, comprise at least one plastic extruder, the extruding pipe die head that contains at least one runner, calibration sleeve, cooling tube, the expansion machine drawing structure of pipe, haulage gear, pressure liquid and/or gas conveying mechanism, the expansion machine drawing structure that it is characterized in that pipe is by the hollow pipe of discharge pressure liquid and/or gaseous fluid and be loaded on the hollow pipe or the sealing-plug that is attached thereto is formed with at least one group of roller hauling machine that contains at least one pair of pressure roller and/or pipe hauling machine, haulage gear comprises pipe hauling machine and/or stretching and drawing machine, having heaters in the device, the outer calibration sleeve of the trombone slide of expansion is arranged in the heater, cooler bin is arranged in the device, the outer calibration sleeve of the cooling of expanding trombone slide is arranged in the cooler bin.
5, manufacturing as claimed in claim 4 footpath, axle biaxial tension or the radially device of simple tension plastic tube is characterized in that cuing open the pipe device before the pipe hauling machine, cut open the pipe device behind the stretching and drawing machine.
6, as claim 4 or 5 described manufacturings footpath, axle biaxial tension or the device of simple tension plastic tube radially, it is characterized in that pressure liquid and/or gas conveying mechanism comprise pressure liquid and/or the gas conveyer that is communicated with the extruding pipe die head by hollow pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011070064A CN1155464C (en) | 2001-01-05 | 2001-01-05 | Method and apparatus for making radial-axial bidirectinal streth or axial single direction stretch plastic pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011070064A CN1155464C (en) | 2001-01-05 | 2001-01-05 | Method and apparatus for making radial-axial bidirectinal streth or axial single direction stretch plastic pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1319494A CN1319494A (en) | 2001-10-31 |
| CN1155464C true CN1155464C (en) | 2004-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011070064A Expired - Fee Related CN1155464C (en) | 2001-01-05 | 2001-01-05 | Method and apparatus for making radial-axial bidirectinal streth or axial single direction stretch plastic pipe |
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| CN (1) | CN1155464C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107901391A (en) * | 2017-12-26 | 2018-04-13 | 四川省纺织科学研究院 | A kind of tubular membrane radial drawing device and drawing process |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102366997B (en) * | 2011-10-31 | 2014-06-11 | 浙江金洲管道工业有限公司 | Auxiliary sizing device for plastic pipe production |
| CN103395183B (en) * | 2013-07-26 | 2015-08-05 | 鹤山市塑协塑料加工技术研究所有限公司 | The manufacturing equipment of a kind of biaxial-orienting PVC and polyolefine material tubing and processing condition and method thereof |
| CN104002465B (en) * | 2014-05-15 | 2016-06-29 | 华南理工大学 | A kind of swollen-micro formula biaxial stretching pipe continuous shaping method and equipment |
| CN104149354B (en) * | 2014-07-28 | 2016-06-01 | 北京化工大学 | The production equipment and process of a kind of heavy caliber two-way stretch PVC |
-
2001
- 2001-01-05 CN CNB011070064A patent/CN1155464C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107901391A (en) * | 2017-12-26 | 2018-04-13 | 四川省纺织科学研究院 | A kind of tubular membrane radial drawing device and drawing process |
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| Publication number | Publication date |
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| CN1319494A (en) | 2001-10-31 |
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