CN207512324U - A kind of low adherency spinning melt pipeline - Google Patents

Abstract

The low adherency spinning melt pipeline of one kind of the utility model, melt pipe includes melt pipe outer barrel and melt pipe bushing, melt pipe bushing is located at melt pipe outer barrel, concave-convex anti-adhesion structure is both provided on the inner wall with the component of molten polymer joint of melt pipe bushing, can realize anti-adhesive attraction of the polymer melt in filament spinning component；Concave-convex anti-adhesion structure includes sunk part and projection portion, projection portion is higher by the setting of member internal walls surface, being in direct contact between highly viscous polymer melt and member internal walls is reduced using supporting role between points, and gas suspension effect is formed under the action of high temperature and pressure melt, plays and prevents adhesion from separate type.

Description

A kind of low adherency spinning melt pipeline

Technical field

The present invention relates to textile technology fields, and in particular to a kind of low adherency spinning melt pipeline.

Background technology

The British patent of 1845 is come from the earliest record of melt spinning process.Nineteen thirty-nine melt spinning is as manufacture nylon The production technology of 66 fibers obtains industrial applications.Melt spinning basic process include material melts, from spinneret micropore squeeze out, Melt stream cooling and solidifying forming.Manufactured long filament can be used bobbin coiling and molding or carry out other processing.In melt spinning In the process, it is tired to be sent to metering further along after screw rod transmission, plasticizing, melting for polymer feeding extruder:Metering is poly- to pass through essence Really metering ensures that the melt of polymer can be flowed into stable and uniform in critical component filament spinning component, the melt in filament spinning component By the filtering of filter medium, it is provided in porous spinneret as thread by high pressure press-in after eliminating impurity and bubble；Carefully Stream by horizontal blowing while (quenching) is quickly cooled down, since the effect of following wireline reel also generates super drawing so that diameter Attenuate；As-spun fibre is wound into certain package. 

Filament spinning component is mainly the filter layer being made of upper strata overcurrent lid, metal mesh and filter sand, distributes under normal conditions Plate and porous spinneret are formed.Spinning melt is lain prone type after top-level entries flow into filament spinning component via the back taper minister in ancient times in sand chamber Overcurrent lid diffusely into component inner cavity in, filtration combination layer is ingeniously entered under the action of upper stressor layer.Filter layer usually has Multiple filtration net and METALLIC FILTRATION SAND composition.The a piece of coarse net that steel wire is not lured to weave into often is placed in the top layer of filter layer, is become Cover net or cover net, it is therefore an objective to which the sundries for stopping bulk and the layer of sand for preventing lower part move.When filter sand is used to filter, press in principle Grit size is carefully sequentially arranged by thick.During placement multistorey strainer mesh and by the descending principle of mesh size.In filtering group The bottom for closing layer has placed one layer of supporting network, it is typically to be made of a piece of or two panels coarse net, it is therefore an objective to support upper strata mistake Filtering layer increases longitudinal rigidity, has the function that not to be depressed, it can also prevent from draining to the work of spinneret orifice under broken filter sand sometimes With.Melt after fine filtering is flowed into the hole of distribution plate.On the one hand the effect of distribution plate is to play support upper level filter Layer, is on the other hand before polymer melt is assigned to spinneret plate as homogeneously as possible so that the uniform flow per hole also replaces Spinneret has shared the melt pressure of part so that spinning plate surface is unlikely to superpressure and deforms.Polymer melt is squeezed into After the guide hole of spinneret, micropore gives the certain shape of melt and is extruded as strand, finishes to dazzle body like this in spinning group The design of the filament spinning component of part internal flow need to mainly determine its structure snd size.Wherein component external structure snd size are main The problems such as needing to consider the intensity and corrosion resistance of itself, the problem of also relating to installing and dismounting and leakproofness.Filament spinning component Internal element just really carries main spinning function, it should how to select filtration combination element, hybrid element, distribution member With spinneret panel element etc., it is necessary to comprehensive to go fully to calculate from multi-angles such as hydrodynamics, melt rheology and heat conductions And consideration.Certainly the problem of can not ignoring the inner sealing of each element and strong rigidity while design.Melt spinning is in height The lower progress of temperature, if polymer melt is chronically at high humidity state, it may occur that degradation influences the quality of precursor, and institute W is being designed During component internal channel, melt should be made to be uniformly distributed in each micropore of spinneret as far as possible, channel resistance should be equal, in component It cannot be there are dead angle, in order to avoid melt residence time is long and decomposes.It should process smooth with king's part surface of melt contacts, Material cannot be made to be detained due to wall surface resistance.Fluid motion uniformity mainly includes fluid motion speed, pressure in  filament spinning components The contents such as power, residence time, discharging distribution.Ideal filament spinning component should be able to ensure that above-mentioned parameter is all identical simultaneously, sample presentation It just can ensure that polymer melt is evenly distributed to identical matter in each spinneret orifice of spinneret, it is equal finally to spin out structural behaviour Even high quality fibers.However, the factor for influencing flow field uniformity in filament spinning component is numerous, wherein mainly having material properties, work Skill condition, device structure parameter etc..When the above two control identical, device structure is its most important influence factor again. 

The flow behavior of   polymer melts is more complex compared with for small molecule solution.Under external force, melt Irreversible viscous yielding is not only shown, but also shows reversible flexible deformation.This is because the flowing of polymer is simultaneously It is not simple Relative sliding between macromolecular chain, but the overall result of moving cell transition successively.Under external force, high score Subchain is inevitably stretched along external force direction, removes external force, and macromolecular chain will be spontaneously rolled up again.This conformation Elastically-deformable development and Recovery Process caused by variation are relaxation, which depends on polymer molecular weight, external force Action time, temperature etc..In molding process, the appearance of flexible deformation and its subsequent lax pair fiber, dimensionally stable Property, internal stress etc. have substantial connection.

High polymer molten viscosity is cut flowing and is mainly characterized in that:It is very high to cut viscosity；Viscosity strong depend-ence trimming rate is cut, absolutely Most of high polymer moltens belong to pseudoplastic fluid；Velocity flow profile of the pseudoplastic behavior high polymer molten in pipe is not parabolically It is linear, and plunger flow is close to, velocity gradient concentrates on near-wall, may have tube wall to slide in some cases and move, It there may also be molecular-weight gradation effect in flowing, low molecular weight fraction made to be more than pipe axis in near-wall.

It is not constant temperature process in actual production process, and is unstable state, but above-mentioned " spinnability " is theoretical, it is right The forming process of chemical fibre still has preferable reference and directive significance, and the principal element obtained in theoretical from " spinnability " is all It is the factor that spinning is controlled to be smoothed out.Such as be viscosity and surface tension to capillary mechanism major influence factors, to cohesive energy The principal element that failure mechanism influences is deformation speed and viscoplasticity size etc..Understanding the spinnability principle of melt contributes to us When adjusting spinning technique, optimal conditions are targetedly selected, so as to avoid occurring wild effect in spinning.Change and spin The rheological property of silk Wang Yi parameters and raw material may cause the variable element range for stablizing spinning fully to increase, convenient and technique Adjustment. 

Since the high temperature polymer melt of melting needs to shift and flow in filament spinning component, high-temperature fusant is with spinning Inevitably there are contacts for the quality inspection of silk component, also just inevitably there is adherency on the inner wall of filament spinning component, Although the smooth enough of its inwall processing can largely be reduced when preparing filament spinning component at present Attachment of polymers caused by due to inner wall surface problem, still, due to the limitation of machining accuracy and processing technology, it is difficult to accomplish Inner wall is completely smooth, and still can generate the adherency of polymer in this way；Also have in the prior art in spinning process in polymer and The scheme of lubricant is added between the inner wall of filament spinning component, certain anti-adhesiving effect can be played in this way, but these are added to The lubricant come will certainly be entered in polymer, and then the property of polymer and the generation of the property of follow-up spinning are unexpected Influence and worthless.Due to the adherency of the polymer in spinning process, after the production schedule for not completing a batch It is required for thoroughly cleaning filament spinning component, time and cost can be caused greatly to consume the cleaning of filament spinning component, and And can also be difficult to be cleaned there are some dead angles, and subsequent production can be adversely affected.Therefore, there is an urgent need for open The low adherency of filament spinning component or anti-blocking techniques that send out a kind of new, the shortcomings that overcome in the prior art.

Invention content

For the prior art there are above-mentioned technical problem, the present invention, which provides one kind, can significantly reduce polymer melt molten The novel spinning melt pipe adhered on body pipeline.

To achieve the above object, the present invention provides following technical scheme：

A kind of low adherency spinning melt pipeline, the melt pipe include melt pipe outer barrel and melt pipe bushing, melt Body pipe liner is located at melt pipe outer barrel；The melt pipe outer barrel and melt pipe bushing are respectively provided with the head end of opening And tail end, the melt pipe bushing is interior to form inner cavity, between the melt pipe bushing barrel and melt pipe outer barrel barrel There are gap, sealing is equipped between the tail end of the melt pipe bushing opening and the barrel of head end and melt pipe outer barrel barrel Structure, the head end and tail end of the opening of the melt pipe bushing are sealed and installed with head end filter device and tail end filtering dress respectively It puts；It is provided with bumps in the inner wall surface being in contact with polymer melt in melt pipe bushing to prevent adhesion mechanism, the bumps are anti- Adhesion mechanism is equally distributed recess and protrusion.

Preferably, the recess in the concave-convex anti-adhesion structure and protrusion is spaced is uniformly distributed；The surface area of protrusion It it is 0.5-2 square millimeters, the surface area of recess is 1-3 square millimeters.

Preferably, circumferentially arranged with ring-shaped groove, the tail end on the barrel close to the melt pipe bushing tail end Filter device is arranged in ring-shaped groove.

Preferably, the barrel of the melt pipe bushing is protruded in the edge extension of the melt pipe bushing head end.

Preferably, the tail end filter device case melt pipe bushing sunken inside of the melt pipe bushing.

Preferably, the barrel of melt pipe outer barrel extends radially outward to form the first protrusion, the sealing structure packet The annular groove being circumferentially disposed on the melt pipe outer tube inner wall is included, the barrel of the melt pipe bushing head end is radially The second protrusion is extended outward to form, second protrusion is corresponding with the annular groove, the first protrusion connection Flange, the head end filter device is between the melt pipe outer barrel, melt pipe bushing and flange.

Preferably, the sealing surface of the flange is equipped with water wave line.

Preferably, the head end filter device and tail end filter device are metal filter screen.

Beneficial effects of the present invention：

The low adherency spinning melt pipeline of one kind of the present invention, the melt pipe include melt pipe outer barrel and melt pipe Bushing, melt pipe bushing are located at melt pipe outer barrel.Compared with the melt pipe in traditional fused spinning assembling parts, tool It has the advantage that：Bumps are both provided on the surface of the component being in contact with molten polymer of melt pipe bushing to prevent adhesion Structure can realize anti-adhesive attraction of the polymer melt in filament spinning component；The prevent adhesion mechanism of action of mechanism of the bumps is： Concave-convex anti-adhesion structure includes sunk part and projection portion, and projection portion is higher by the setting of parts surface surface, using point with Supporting role between point reduces being in direct contact, and in high temperature and pressure between highly viscous polymer melt and parts surface Gas suspension effect is formed under the action of melt, plays and prevents adhesion from separate type；Sunk structure plays the work for accommodating levitation gas With with projection portion mutual cooperation；The surface area of protrusion is 0.5-2 square millimeters, and the surface area of recess is 1-3 square millimeters, Preferably, raised surface area is 1 square millimeter, and the surface area of recess is 2 square millimeters, sunk part and lug boss branch point Accurate cellular protection grid is connected to form, parts surface and polymer melt are separated, increase the effect to prevent adhesion.It is convex The area for playing part and sunk part should not be too large, if area is excessive, can not play good preventing adhesiving effect, and The situation that polymer melt is directly in contact with parts surface is without two；The area of the two is also unsuitable too small, if area is too small, It can not play estimated preventing adhesiving effect, and difficulty of processing also can be very big.Concave-convex anti-adhesion structure can be spun preparing Apply on these parts respectively during the various pieces of silk component, may be used the sark with the concave-convex mechanism that prevents adhesion is straight It connects the docile and obedient form on the surface of component to carry out, can also be carried out in the form of precision lathe processing, specific processing method It is common parts machining means of the prior art, no longer describes herein.

Description of the drawings

Fig. 1 is the low adherency spinning melt piping schematic of the present invention.

Reference numeral：

1 --- melt pipe outer barrel；

2 --- melt pipe bushing；

3 --- gap；

4 --- head end filter device；

5 --- tail end filter device；

6 --- ring-shaped groove；

7 --- the first protrusion；

8 --- annular groove；

9 --- the second protrusion；

10 --- flange.

Specific embodiment

Below in conjunction with specific embodiment and attached drawing, the present invention is described in detail.

A kind of low adherency spinning melt pipeline, the melt pipe include melt pipe outer barrel 1 and melt pipe bushing 2, Melt pipe bushing 2 is located inside melt pipe outer barrel 1；The melt pipe outer barrel 1 and melt pipe bushing 2 are respectively provided with opening Head end and tail end, inner cavity, 2 barrel of melt pipe bushing and melt pipe outer barrel 1 are formed in the melt pipe bushing 2 There are gap 3, the tail ends and the barrel of head end and 1 barrel of melt pipe outer barrel of the opening of melt pipe bushing 2 between barrel Between be equipped with sealing structure, the head end and tail end of the opening of the melt pipe bushing 2 are sealed and installed with head end filtering dress respectively Put 4 and tail end filter device 5；It is provided in the inner wall surface being in contact in melt pipe bushing 2 with polymer melt concave-convex anti- Adhesion mechanism, the bumps prevent adhesion mechanism as equally distributed recess and protrusion.

Concave-convex anti-sticking connection is both provided on the surface of the component being in contact with molten polymer of melt pipe bushing Structure can realize anti-adhesive attraction of the polymer melt in filament spinning component；The prevent adhesion mechanism of action of mechanism of the bumps is：It is recessed Convex anti-adhesion structure includes sunk part and projection portion, and projection portion is higher by the setting of parts surface surface, utilizes point and point Between supporting role reduce being in direct contact, and melted in high temperature and pressure between highly viscous polymer melt and parts surface Gas suspension effect is formed under the action of body, plays and prevents adhesion from separate type；Sunk structure plays the role of accommodating levitation gas, It cooperates with projection portion；The surface area of protrusion is 0.5-2 square millimeters, and the surface area of recess is 1-3 square millimeters, preferably Ground, raised surface area are 1 square millimeter, and the surface area of recess is 2 square millimeters, and sunk part is connected with lug boss branch point Accurate cellular protection grid is formed, parts surface and polymer melt are separated, increase the effect to prevent adhesion.Lug boss Divide and the area of sunk part should not be too large, if area is excessive, good preventing adhesiving effect, and polymerization can not be played The situation that object melt is directly in contact with parts surface is without two；The area of the two is also unsuitable too small, if area is too small, Estimated preventing adhesiving effect cannot be played, and difficulty of processing also can be very big.Concave-convex anti-adhesion structure can prepare spinning group Apply on these parts respectively during the various pieces of part, may be used the direct note of sark for the mechanism that prevents adhesion with bumps It takes the form on the surface of component to carry out, can also be carried out in the form of precision lathe processing, specific processing method is Common parts machining means of the prior art.Further, since in melt pipe bushing barrel and melt pipe outer barrel cylinder There are gaps between wall, can accommodate and receive the melt pipe bushing deformation brought due to high temperature when flowing through high-temperature fusant Problem so that the process of spinning is more smooth.

Wherein, the recess in the concave-convex anti-adhesion structure and protrusion is spaced is uniformly distributed；Protrusion surface area be 0.5-2 square millimeters, the surface area of recess is 1-3 square millimeters.

For the ease of installing tail end filter device, circumferentially set on the barrel close to 2 tail end of melt pipe bushing There is ring-shaped groove 6, the tail end filter device 5 is arranged on 6 in ring-shaped groove.

The barrel of the melt pipe bushing is protruded in the edge extension of 2 head end of melt pipe bushing, melt pipe bushing Tail end filter device case melt pipe bushing sunken inside.

For the ease of installing head end filter device, the barrel of melt pipe outer barrel extends radially outward to form the first protrusion Portion 7, the sealing structure include the annular groove 8 being circumferentially disposed on 1 inner wall of melt pipe outer barrel, the melt pipe The barrel of 2 head end of road bushing extends radially outwardly to form the second protrusion 9, second protrusion 9 and 8 phase of annular groove Corresponding, 7 connecting flange 10 of the first protrusion, the head end filter device 4 is located at the melt pipe outer barrel 1, melt pipe Between road bushing 2 and flange 10, the sealing surface of flange 10 is equipped with water wave line.

According to actual needs, head end filter device 4 and tail end filter device 5 are metal filter screen.

Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than the present invention is protected The limitation of range is protected, although being explained in detail with reference to preferred embodiment to the present invention, those of ordinary skill in the art should Work as understanding, technical scheme of the present invention can be modified or replaced equivalently, without departing from the reality of technical solution of the present invention Matter and range.

Claims (8)

1. a kind of low adherency spinning melt pipeline, which is characterized in that the melt pipe includes melt pipe outer barrel and melt pipe Road bushing, melt pipe bushing are located at melt pipe outer barrel；The melt pipe outer barrel and melt pipe bushing are respectively provided with The head end and tail end of opening, form inner cavity in the melt pipe bushing, the melt pipe bushing barrel with outside melt pipe There are gap between cylinder barrel, the tail end of the melt pipe bushing opening and the barrel and melt pipe outer barrel barrel of head end it Between be equipped with sealing structure, the head end and tail end of the opening of the melt pipe bushing be sealed and installed with respectively head end filter device and Tail end filter device；Bumps are provided in the inner wall surface being in contact with polymer melt in melt pipe bushing to prevent adhesion machine Structure, the bumps prevent adhesion mechanism as equally distributed recess and protrusion.

2. low adherency spinning melt pipeline as described in claim 1, which is characterized in that the bumps prevent adhesion recessed in mechanism It falls into and protrusion spaced is uniformly distributed；The surface area of protrusion is 0.5-2 square millimeters, and the surface area of recess is 1-3 squares of milli Rice.

3. low adherency spinning melt pipeline according to claim 2, which is characterized in that close to the melt pipe bushing It is arranged in ring-shaped groove circumferentially arranged with ring-shaped groove, the tail end filter device on the barrel of tail end.

4. low adherency spinning melt pipeline according to claim 3, which is characterized in that the melt pipe bushing head end The barrel of the melt pipe bushing is protruded in edge extension.

5. low adherency spinning melt pipeline according to claim 4, which is characterized in that the tail end of the melt pipe bushing Filter device case melt pipe bushing sunken inside.

6. low adherency spinning melt pipeline according to claim 5, which is characterized in that the barrel of melt pipe outer barrel is along diameter To the first protrusion is extended outward to form, the sealing structure includes being circumferentially disposed on the melt pipe outer tube inner wall Annular groove, the barrel of the melt pipe bushing head end extend radially outwardly to form the second protrusion, second protrusion Corresponding with the annular groove, the first protrusion connecting flange, the head end filter device is located at the melt pipe Between outer barrel, melt pipe bushing and flange.

7. low adherency spinning melt pipeline according to claim 6, which is characterized in that the sealing surface of the flange is equipped with Water wave line.

8. low adherency spinning melt pipeline according to claim 7, which is characterized in that the head end filter device and tail end Filter device is metal filter screen.