CN1148640A - Spinning nozzle with integrated heat insulation - Google Patents
Spinning nozzle with integrated heat insulation Download PDFInfo
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- CN1148640A CN1148640A CN 96109411 CN96109411A CN1148640A CN 1148640 A CN1148640 A CN 1148640A CN 96109411 CN96109411 CN 96109411 CN 96109411 A CN96109411 A CN 96109411A CN 1148640 A CN1148640 A CN 1148640A
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Abstract
A spinning nozzle with integrated heat insulation, spinning plate is preferably made of metals and has channels which run from a spinneret entry side to an exit side. Between these sides is inserted thermal insulation which is shut off from below by another plate out of which the spinneret capillaries emerge. The thermal insulation is formed by at least one cavity in the spinneret plate.
Description
The present invention relates to a kind of spinning-nozzle with integrated heat insulation, have the most handy metal spinnerets, it is extended with the nozzle path between entrance side and outlet side, and it constitutes heat insulation between inlet and outlet side, be preferably near the outlet side.Belong to textile technology field.
The technology and the operational characteristic of the spinnerets of common even formation are affected, because radially descend continuously from the edge to the center in the temperature on outlet side surface, the temperature that therefore exports melt-flow differs certain amount along equidirectional.Thereby on its cross section, form corresponding thermograde simultaneously.This just causes a kind of viscosity gradient.
A kind of spinning-nozzle according to the profile kind is known by patent DD-PS28729.The spinning-nozzle of Miao Shuing therein, its outlet side is partly insulated, but only spreads all over its most surface.Want to reach the purpose that all has uniform temperature to distribute around each nozzle by means of this spinning-nozzle, so, the cross section of melt-flow does not provide an asymmetrical temp and such viscous temperature distributes, and it will cause producing a uncontrolled tilt outlet of a melt-flow.In this piece document, further disclosed,, for example used asbestos, can stop the formation of little molten drop so at nozzle surface, because the formation of its meeting chaff if spinnerets is insulated as much as possible at the melt outlet side.The positive effect of this known structure is present in: can stop the heat from the spinnerets to surrounding air to be conducted by insulation.In addition, also disclosed spinnerets at outlet side, that is externally be insulated.Like this, at insulating regions, comprise that the outer surface of spinnerets body does not comprise the wherein same material of drilled nozzle bore except being adjacent to most the surface of the whole outlet side the nozzle bore, but comprise one deck insulating materials.
Adopt the problem of known spinnerets in melt spinning to be: especially described in the referenced patents like that, it is necessary that high polymer-melt temperature is adopted in the formation of silk, also supposes it is corresponding high temperature at outlet side around the surface of each nozzle bore.According to the observation, this causes producing the deposit that evaporates the low polymer component at the spinnerets outlet side, and it will cause disturbing nozzle spinning capillaceous after certain hour, owing to need the cleaning spinnerets, so in any case it will cause producing interruption.Because described insulating barrier on spinnerets in the prior art, because the heat of introducing from entrance side and pass the heat of nozzle path melt-flow, can not be transmitted to the side and remove, so be higher than temperature when same place adopts the solid metal nozzle around the humidity of each nozzle bore by big metal surface.
The objective of the invention is to disclose a kind of spinning-nozzle according to the profile kind, though wherein be in best height by nozzle polymer melt outlet temperature capillaceous, when the exploitation polymer fluid, improve the quality of silk by means of capillary, with above-mentioned irrelevant, and the spinnerets surface around nozzle bore has alap temperature in the exit.According to the observation, forming above-mentionedly has the speed of the deposit of overslaugh to reduce by 3 to 4 times, and the production interrupt interval that is used to clean has also just correspondingly prolonged.
The present invention seeks to realize like this:
A kind of spinning-nozzle of plate-like form, the most handy metal is made, it is included in the nozzle passage that extends between inlet side and the outlet side, it is characterized in that: a heat insulation is interposed between the entrance and exit side, a plate is in a downward direction with its sealing, the nozzle capillary is connected on the termination by plate, wherein at least by means of a heat insulation cavity, constitutes heat insulation in spinnerets.As from the foregoing, heat insulation is made of at least one heat insulation cavity in spinnerets.This cavity preferably is evacuated, and perhaps contains the gas of thin low-grade fever conduction capacity.But also can fill with the solid insulation material.
By means of design, because the thermal conductance in the nozzle material from the nozzle entrance side to outlet side is very little so hot-fluid looses, particularly because the insulation only narrow heat bridge that cavity structure produced according to spinning-nozzle of the present invention.In addition, shown a big surface thermal radiation on the spinning-nozzle surface of outlet side.
Therefore, can provide a cold jet expansion surface, it preferably includes the matrix material identical with spinnerets, does not remove to cool off the melt that occurs when by nozzle bore.Because the insulation cavity is sealed the thin walled nozzle analog channel respectively,, have only the seldom calorimetric can be from here along shifting (conduction) towards the surface of outlet so these only embody a narrow thermal conductance cross section.For this reason, even can reduce melt temperature a little and opposite with prior art.Because it, it is littler that the thermal stress of polymer melt can keep.In brief, basic design of the present invention comprises: by means of narrow heat bridge, hot-fluid is loose to nozzle externally surface reduce to minimum by thermal conductance through nozzle material from entrance side, in addition, this exit surface is equivalent to a big surface thermal radiation.Because opposite with prior art, heat radiation is very not to be prevented from carefully, because the ratio between big thermal radiation capability and little hot-fluid loose, so nozzle surface is distinguishingly cooled off.It has caused according to the present invention in the described advantage of beginning.The insulation cavity is being sealed the thin walled nozzle analog channel respectively, stops silk to be shaped simultaneously and melts the one-sided cooling of stream, therefore has the described nozzle advantage of the patent of quoting as proof extraly according to nozzle of the present invention.
Though, because according to design of the present invention, around each capilar bore place, low 10 to 50K (Degree Kelvins) of temperature of the nozzle that the temperature beguine of nozzle matrix material uses according to prior art, an outlet silk shaped polymer melt do not show that corresponding or similar temperature falls at exit surface.Verified: spinning-nozzle constructed according to the invention, spreading all over the most of melt path, nozzle than uniform Design has higher temperature, and colder part only comprises the thin layer on the exit face, it no longer can remove the heat from the outlet polymer melt, so it has conclusive effect.Though the nozzle of Gou Chenging has a colder surface at outlet side than even nozzle or according to quoting the insulation nozzle that patent operates under the same conditions as proof in this way, the polymer filament outlet temperature is recently from the even silk Wen Genggao of nozzle.Higher temperature causes than low viscosity, just macromolecular than large fluidity, therefore from nozzle capillary stenosis after their outlets, they can more easily relax, although that is in the spinning technique process, its internal stress can be reduced to reduced levels, because spinning technique, the molecule that has consequently reduced spinning is directed in advance.Because want the more warm polymer melt of stabilization ratio, must remove more heat, the distance in the time of till elementary monofilament solidifies has increased, and therefore has more time to can be used for relaxing.The result is that the elementary monofilament that solidifies has less molecule orientation in advance, and it produces higher elongation in the fracture value in an advantageous manner, and for next processing step produces the draftability of increase, thereby cause the higher productivity of whole technical process.Because it is opposite with colder long filament, has more advanced molecular relaxation, the distribution of depending on the molecular orientation value has also obtained compensation preferably, for example described elongation, and during processing further employed intensity and stretching force, the oeverall quality that will cause spinning to improve by means of nozzle according to the present invention.
During using according to spinning-nozzle of the present invention, other is usual and is exquisite that for the device that increases the monofilament slackness can economize in an advantageous manner now and omit, perhaps they are simplified or reduce up to now.These are back heating parts, comprise heating chamber, by it still the long filament of fusion by direct guide below nozzle, so that be increased in the time of staying under the molten state, perhaps by under high pressure melt flow stream being pressed into or direct stenosis of passing appropriate size in the front of nozzle, mechanical energy is converted to heat energy, increases ladder so that improve the temperature of melt flow stream mass flowing nozzle.
Spinning-nozzle according to the present invention is to adopt the part of different heat conductivilitys to combine, at least spinnerets generally includes matrix material closely, preferably steel, other metal or alloy, cavity is formed in wherein, by vacuumizing or fill, that is adopt a kind of material that has the low capacity of heat transmission than spinnerets major part with heat insulator.The insulation effect of this cavity is owing to the heat radiation insulation by it has increased.The wall of cavity preferably forms minute surface by polishing, and radiation has reduced thus, and albedo has increased.Also can provide a plurality of cavitys to replace a cavity, then effect is better.
A kind of further preferred implementation is present in the heat bridge, it is by the insulation cavity and/or laterally in abutting connection with heat bridge, be embodied as narrow or use a kind of cross section of reducing thermal conductance, particularly make the wall of polymer melt passage thinly as far as possible, and still consider and the strength stability requirement so just can obtain effect.The parts of different embodiments can certainly be combined mutually.
Below in conjunction with accompanying drawing preferred implementation of the present invention is elaborated, but must not limits the present invention's design thus:
Fig. 1 represents the structural representation of the spinnerets according to the present invention;
The partial enlarged drawing of Fig. 2 presentation graphs 1;
Fig. 3 presentation graphs 1 and Fig. 2 temperature course curve in spinnerets.
Be spinnerets 1 structure of (being called for short " spinning-nozzle ") as depicted in figs. 1 and 2, it is integrated by the elements such as spinning head shell 3 of common spinning device, wall 2 and heating.Spinning-nozzle 1 comprises nozzle passage 4,5, and it does a conversion at the port of export, the outlet capillary (nozzle capillary) 5 from the analog channel 4 of entrance side to the silk moulding.Cavity 6 is used for heat insulation in spinning-nozzle.Heat insulation layer in cavity 6 can comprise a kind of material and cavity of low-heat conduction.It preferably vacuumizes or thin gas.Vacuum can imagine it is best heat insulator.Cavity 6 seals by a cover plate 8 at outlet side.
Fig. 2 is the partial enlarged drawing of Fig. 1, and preferred forms is that adiabatic cavity is evacuated.Lower cover 8 with spinning-nozzle seals it, and is connected by means of the supporting member of thin-walled material cross section 7 and nozzle arrangements.Hot-fluid between outlet side spinning device inner face that contacts with surrounding air and cover plate 8 is blocked by means of stenotic material cross section 7 and adiabatic cavity 6.Like this, cover plate 8 has lower temperature than the spinning-nozzle of homogeneous materials, is removed by its heat.
The analog channel 4 of molten mass is conducted through heat insulation layer (being cavity 6).For this purpose, they are enclosed very in the thin-walled 7, preferably use metal material, because its small bore provides high thermal resistance along its direction of heat flow 18 (see figure 3)s.The thickness of wall 7 depends on that polymer molten fluid passes the requirement of its proof pressure stability.
Fig. 3 is according to Fig. 1 and Fig. 2 temperature course curve along direction of heat flow in nozzle material, and near about this zone, show with graphic form, and compare with the temperature course with the spinning-nozzle usually made with homogeneous material, wherein the inside along heat flow path from the spinning device enters that the material temperature in zone (filling with surrounding air) is suitable for below the spinning device.
Diagram originates in temperature 9, suppose that to two kinds of modification be identical, the melt that enters spreads all over the inside of nozzle housing, its temperature with spinning device structural material is equal to, and process according to temperature, with comparing as far as quite lower temperature 10 (surrounding air below the spinning device), it is assumed to be that also for two kinds of modification be identical.
In structural material or the thermograde of insulation in the cavity occupy spinning device interior zone and under surrounding air between.Be proved to be: thermograde 11 is in that the present invention is positioned on the largest portion of nozzle distance according to Fig. 1, descends than the contrast gradient in the common nozzle 12 is less precipitously.And thermograde 13 descends in insulation cavity 6 zones precipitously.And reach one than the more low value 14 that uses common nozzle situation on the jet expansion surface, and normal conditions are higher temperature 15.The result is the temperature difference 16 on the jet expansion surface between nozzle of the present invention and the plain nozzle according to Fig. 1.Label 17 is temperature axes of coordinates (temperature rises from left to right), and label 18 is heat flow path axes of coordinates.
Temperature when initial monofilament leaves according to Fig. 1 nozzle of the present invention is higher than plain nozzle.This point can be obtained explaining by thermograde 11, it is higher on average, because the supporting part of nozzle arrangements is heavier, and such fact promptly: in the residual paths 13 of outlet side, in insulation cavity 6 and in thin-walled connects cross section 7, almost do not have hot-fluid and be pulled away, this point has meaning.
The temperature difference that is produced in the spinning nozzle inside configuration requires the above-mentioned excessively insulation cavity 6 of type of thermal communication.So, just produced and be positioned at the following lower temperature of residue nozzle body, for example in the certain structure zone cover plate 8 of outlet side (for example), therein, with the form of insulation cavity 6 and nozzle wall 7 small bores, apply a resistance towards cover plate 8 for heat flow path, and in order to overcome it, require a temperature to fall, than the big temperature difference amount 16 of solid material nozzle with routine.In other words:
It mainly is convection type (being down in the drawings) that each spinning-nozzle reaches by radiation in the melt spinning process, spreads all over outlet side surface release heat in atmosphere, has so just had quite big lower temperature 10.Because heat only is mobile along temperature descent direction at that time, comprise the temperature of All Media, except that polymer melt, itself flows along the direction of heat flow path axle 18, and temperature drops to temperature value 10 from temperature value 9.In certain member, the steepness that temperature descends depends on the insulation values of himself, perhaps increases along with reducing thermal conductance.Because in the nozzle housing temperature inside is by means of determining from the external heated (i.e. spinning head shell 3 from heating) and the temperature of inflow polymer melt, the temperature that increases is fallen only can be owing to having sealed at outlet side towards outside and surperficial insulating barrier, the lower temperature that just can cause cover plate 8 is as illustrating qualitatively among Fig. 3.
In an embodiment of the present invention, developed a kind of spinning-nozzle, can realize spraying a high-temperature of melt outlet by means of it with metal (steel) system, for example 280 ℃, and, for example only be 265 ℃ in the temperature of nozzle surface.By means of this nozzle, can realize successfully that the time interval between the cleaning course increases by 3 to 4 times, this interval all causes producing at every turn interrupts, and need reset spinning and winding process process, and therefore, technical process efficient produces sizable improvement.
If cooling blast is flowed along the exit surface of at least a portion according to spinnerets of the present invention, will be favourable.
Claims (8)
1. spinning-nozzle with integrated heat insulation, comprise: the most handy a kind of metal plate (1), it contains the nozzle passage (4 that extends between inlet side and outlet side, 5), it is characterized in that: a heat insulation (6) is interposed between the entrance and exit side, a plate (8) is in a downward direction with its sealing, nozzle capillary (5) is connected on the termination by plate, wherein, constitutes heat insulation by means of a heat insulation cavity (6) in spinning-nozzle plate (1) at least.
2. according to the spinning-nozzle of claim 1, it is characterized in that in cavity (6), being vacuum.
3. according to the spinning-nozzle of claim 1 or 2, it is characterized in that in cavity (6), filling preferably thin gas with the heat insulation medium.
4. according to each spinning-nozzle in the claim 1～3, it is characterized in that heat bridge by cavity (6), for example wall (7) surrounds each nozzle passage, its formation is very thin, wherein in order to keep pressure through the molten stream of its inner downward polymer, withstand voltage stability requirement has limited the intensity of wall, and towards side, also constitute thin-walled towards the closed-wall of the cavity of outside.
5. according to each spinning-nozzle in the claim 1～4, it is characterized in that the inner surface of cavity is polished to minute surface.
6. according to each spinning-nozzle in the claim 1～5, it is characterized in that refrigerating gas flows spreads all over the outside of closure plate (8).
7. use and in spinning apparatus, be used to produce long filament and fiber according to each at least a spinning-nozzle in the claim 1 to 6.
8. use in spinning apparatus, to be used to produce long filament and fiber, when it breaks away from spinning-nozzle, have the smooth slackness of increase according to each at least a spinning-nozzle in the claim 1 to 7.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19530108 | 1995-08-16 | ||
| DE19530108.0 | 1995-08-16 | ||
| DE19626051.5 | 1996-06-28 | ||
| DE19626051A DE19626051C2 (en) | 1995-08-16 | 1996-06-28 | Spinneret plate with integrated thermal insulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1148640A true CN1148640A (en) | 1997-04-30 |
Family
ID=26017744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96109411 Pending CN1148640A (en) | 1995-08-16 | 1996-08-16 | Spinning nozzle with integrated heat insulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1148640A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107988636A (en) * | 2017-12-29 | 2018-05-04 | 江苏中奕复高新科技有限公司 | Carbon fiber melt spinning process spinning nozzle component |
| CN107988637A (en) * | 2017-12-29 | 2018-05-04 | 宜兴市飞舟高新科技材料有限公司 | Carbon fiber spinneret composite component |
| CN109642344A (en) * | 2016-05-02 | 2019-04-16 | 韩国生产技术研究院 | For manufacturing the spinneret device of high strength fibre |
| CN109790644A (en) * | 2016-09-30 | 2019-05-21 | 米歇尔.范德威尔公司 | Spinning head |
-
1996
- 1996-08-16 CN CN 96109411 patent/CN1148640A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109642344A (en) * | 2016-05-02 | 2019-04-16 | 韩国生产技术研究院 | For manufacturing the spinneret device of high strength fibre |
| CN109642344B (en) * | 2016-05-02 | 2021-08-13 | 韩国生产技术研究院 | Spinning head device for manufacturing high-strength fibers |
| CN109790644A (en) * | 2016-09-30 | 2019-05-21 | 米歇尔.范德威尔公司 | Spinning head |
| CN107988636A (en) * | 2017-12-29 | 2018-05-04 | 江苏中奕复高新科技有限公司 | Carbon fiber melt spinning process spinning nozzle component |
| CN107988637A (en) * | 2017-12-29 | 2018-05-04 | 宜兴市飞舟高新科技材料有限公司 | Carbon fiber spinneret composite component |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |