CN207845836U - A kind of polymer melt metering pump - Google Patents

Abstract

A kind of polymer melt metering pump of the utility model, it include the pump housing with pump chamber and into and out of material mouth, in being both provided with concave-convex anti-adhesion structure on the wall with the component of molten polymer joint in metering pump, anti-adhesive attraction of the polymer melt in filament spinning component may be implemented；The prevent adhesion mechanism of action of mechanism of the bumps is：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 polymer melt metering pump

Technical field

The utility model is related to textile technology fields, and in particular to a kind of new polymers melt metering pump.

Background technology

British patent in 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 includes material melts, squeezed out from spinneret micropore, 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, polymer feeds extruder, and it is tired to be sent to metering further along after screw rod transmission, plasticizing, melting: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 indentation after eliminating impurity and bubble；Carefully Stream by horizontal blowing while being quickly cooled down (quenching), 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 layer overcurrent lid, metal mesh and filter sand, distributes under normal conditions Plate and porous spinneret are constituted.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 enter 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 for not luring steel wire 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 being filtered using filter sand, press in principle Grit size is carefully sequentially arranged by thick.When placing 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 layer 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 flows 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 When component internal channel, melt should be made to be uniformly distributed in each micropore of spinneret as far as possible, channel resistance answer it is equal, in component There cannot be dead angle, in case 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 includes mainly fluid motion speed, pressure in filament spinning component 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 melt is more complex compared with for small molecule solution.Under external force, melt is not Irreversible viscous yielding is only shown, but also shows reversible flexible deformation.This is because the flowing of polymer is not It is simple Relative sliding between macromolecular chain, but the overall result of moving cell transition successively.Under external force, macromolecule Chain is inevitably stretched along external force direction, removes external force, and macromolecular chain will be spontaneously rolled up again.This conformation becomes Elastically-deformable development and Recovery Process caused by changing are relaxation, which depends on polymer molecular weight, outer masterpiece With time, temperature etc..In molding process, the appearance of flexible deformation and its subsequent lax pair fiber, dimensional stability, Internal stress etc. has 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 it is close to plunger flow, velocity gradient concentrates on near-wall, may have tube wall sliding to move in some cases, 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 for controlling spinning and being 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, to avoid occurring wild effect in spinning.Change and spins The rheological property of silk Wang Yi parameters and raw material may make the variable element range for stablizing spinning fully 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 and 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 largely can 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 will produce the adherency of polymer in this way；Also have in the prior art in spinning process in polymer and The scheme that lubricant is added between the inner wall of filament spinning component, can play certain anti-adhesiving effect, but these are added in this way The lubricant come will certainly enter 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 there are some dead angles be cleaned, and can to it is subsequent production adversely affect.Therefore, there is an urgent need for open The anti-adherency of filament spinning component or anti-blocking techniques that send out a kind of new, the shortcomings that overcome in the prior art.

Utility model content

For the prior art there are above-mentioned technical problem, the utility model, which provides, a kind of avoiding polymer melt adhesion New polymers melt metering pump.

To achieve the above object, the utility model provides following technical scheme：

A kind of polymer melt metering pump, includes the pump housing with pump chamber and into and out of material mouth, and feed inlet passes through feed cavity It is communicated with pump chamber, and discharge port is communicated by discharging chamber with pump chamber；One power plant is fixed on the pump housing；It is set to A rotor that is in the pump chamber and being rotatably supported on the pump housing, the rotor connect with the power plant transmission It connects, the top of the pump housing and position placed in the middle offers a material chamber separation trough communicated with the charging and discharging chamber, in the material The barrier sliding block for separating to charging and discharging chamber is provided in chamber separation trough, which transports up and down in material chamber separation trough Bottom surface that is dynamic and obstructing sliding block is touched with the rotor patch always, and a barrier sliding block is provided at the top of the pump housing and is applied Pressure device, the barrier sliding block device for exerting are connect with the middle part of the length direction of the top surface of the barrier sliding block；Pump chamber, Feed inlet, discharge port, feed cavity, discharging chamber, material chamber separation trough, barrier sliding block and rotor are in contact with polymer melt Bumps are both provided on surface to prevent adhesion mechanism；The bumps anti-adhesion structure 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, the center of the side of the rotor is extended with a first axle, which is rotatably supported at On one pump cover, and the center of the other side of rotor is extended with one second spindle nose, and the second spindle nose is rotatably supported on the second pump cover.

Preferably, the power plant includes motor and reduction box, and motor is coupled with reduction box, and is taken by reduction box Motor is fixed with the second pump cover, and the reduction gearbox output shaft of reduction box is connect with the second spindle nose (32).

Preferably, the barrier sliding block device for exerting includes a solid plate and an acting cylinder, and acting cylinder, which is fixed on, to be fixed On plate and be fixedly connected in the middle part of the length direction of the top surface of the barrier sliding block, and the branch solid plate with it is described The top of the pump housing fix.

Preferably, the rotor is cam follower.

The beneficial effects of the utility model：

A kind of polymer melt metering pump of the utility model includes the pump housing with pump chamber and into and out of material mouth.With biography Metering pump in the fused spinning assembling parts of system is compared, and is had the following advantages：Due to being in contact with molten polymer in metering pump Component surface on be both provided with concave-convex anti-adhesion structure, anti-adherency of the polymer melt in filament spinning component may be implemented and make With；The prevent adhesion mechanism of action of mechanism of the bumps is：Concave-convex anti-adhesion structure includes sunk part and projection portion, lug boss Point be higher by parts surface setting, using supporting role between points reduce highly viscous polymer melt and parts surface it Between be in direct contact, and under the action of high temperature and pressure melt formed gas suspension effect, play and prevent adhesion from separate type；It is recessed Sunken structure plays the role of accommodating levitation gas, cooperates with projection portion；The surface area of protrusion is 0.5-2 square millimeters, The surface area of recess is 1-3 square millimeters, it is preferable that raised surface area is 1 square millimeter, and the surface area of recess is 2 squares Millimeter, sunk part and lug boss branch point are connected to form accurate cellular protection grid, and parts surface and polymer are melted Body separates, and increases the effect to prevent adhesion.The area of projection portion and sunk part should not be too large, if area is excessive, simultaneously Good preventing adhesiving effect cannot be played, and without two the case where polymer melt is directly in contact with parts surface；The two Area it is also unsuitable too small, if area is too small, estimated preventing adhesiving effect can not be played, and difficulty of processing also can be very Greatly.Concave-convex anti-adhesion structure can on these parts apply respectively in the various pieces for preparing filament spinning component, may be used By the directly docile and obedient form progress on the surface of component of sark for the mechanism that prevents adhesion with bumps, precision lathe can also be used The form of processing carries out, and specific processing method is common parts machining means in the prior art, is no longer retouched herein It states.

Description of the drawings

Fig. 1 is the structural scheme of mechanism of the utility model metering pump.

Reference numeral：

1 --- pump chamber；

2 --- the pump housing；

3 --- feed inlet；

4 --- feed cavity；

5 --- discharge port；

6 --- discharging chamber；

7 --- rotor；

8 --- material chamber separation trough；

9 --- barrier sliding block；

10 --- barrier sliding block device for exerting；

11 --- branch solid plate；

12 --- acting cylinder.

Specific implementation mode

The utility model is described in detail below in conjunction with specific embodiment and attached drawing.

A kind of polymer melt metering pump, includes the pump housing 2 with pump chamber 1 and into and out of material mouth, feed inlet 3 by into Material chamber 4 is communicated with pump chamber 1, and discharge port 5 is communicated by discharging chamber 6 with pump chamber 1；One power plant is fixed on the pump housing 2 On；It is set to a rotor 7 that is in the pump chamber 1 and being rotatably supported on the pump housing 2, which moves with described Power apparatus is sequentially connected, the top of the pump housing 2 and position placed in the middle offers a material chamber communicated with the charging and discharging chamber Separation trough 8, is provided with the barrier sliding block 9 for separating to charging and discharging chamber in the material chamber separation trough 8, which is expecting It moves up and down in chamber separation trough 8 and the bottom surface for obstructing sliding block 9 is touched with the patch of rotor 7 always, the top of the pump housing 2 Portion is provided with a barrier sliding block device for exerting 10, the barrier sliding block device for exerting 10 and the top surface of the barrier sliding block 9 The middle part of length direction connects；It is slided in pump chamber 1, feed inlet 3, discharge port 5, feed cavity 4, discharging chamber 6, material chamber separation trough 8, barrier Bumps are both provided on the surface of block 9 and rotor 7 being in contact with polymer melt to prevent adhesion mechanism；The anti-sticking connection of the bumps Structure is equally distributed recess and protrusion.

Recess in concave-convex anti-adhesion structure and protrusion is spaced is uniformly distributed；The surface area of protrusion is 0.5-2 squares The surface area of millimeter, recess is 1-3 square millimeters.

It is both provided with concave-convex anti-adhesion structure on the surface for the component of metering pump being in contact with molten polymer, it can be with 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 concave-convex anti-sticking Connection structure includes sunk part and projection portion, projection portion is higher by parts surface surface and is arranged, using between points Supporting role reduces being in direct contact between highly viscous polymer melt and parts surface, and in the work of high temperature and pressure melt It is acted on lower formation gas suspension, plays and prevent adhesion from separate type；Sunk structure plays the role of accommodating levitation gas, with protrusion Part cooperates；The surface area of protrusion is 0.5-2 square millimeters, and the surface area of recess is 1-3 square millimeters, it is preferable that convex The surface area risen is 1 square millimeter, and the surface area of recess is 2 square millimeters, and sunk part and lug boss branch point are connected to form Accurate cellular protection grid, parts surface and polymer melt are separated, the effect to prevent adhesion is increased.Projection portion and The area of sunk part should not be too large, if area is excessive, can not play good preventing adhesiving effect, and polymer melts The case where body is directly in contact with parts surface is without two；The area of the two is also unsuitable too small, can not if area is too small Estimated preventing adhesiving effect is played, and difficulty of processing also can be very big.Concave-convex anti-adhesion structure can prepare filament spinning component Apply on these parts respectively when various pieces, may be used by with bumps prevent adhesion mechanism sark directly it is docile and obedient The form on the surface of component carries out, and can also be carried out in the form of precision lathe processing, specific processing method is existing Common parts machining means in technology.

In order to realize that the support and driving of rotor 7, the center of the side of the rotor are extended with a first axle, this first Spindle nose is rotatably supported on the first pump cover, and the center of the other side of rotor is extended with one second spindle nose, the rotation of the second spindle nose Ground is supported on the second pump cover.Its power plant includes motor and reduction box, and motor is coupled with reduction box, and is taken by reduction box Motor is fixed with the second pump cover, and the reduction gearbox output shaft of reduction box is connect with the second spindle nose (32).

Barrier sliding block device for exerting 10 includes that a solid plate 11 and an acting cylinder 12, acting cylinder 12 are fixed in branch solid plate 11 And be fixedly connected in the middle part of the length direction of the top surface of the barrier sliding block 9, and the branch solid plate 11 with it is described The top of the pump housing 2 fix, acting cylinder is cylinder, oil cylinder or spring cylinder.

It is that vertical sectional shape is oval or the cam follower of triangle that rotor 7, which uses cam follower, cam follower,.

Finally it should be noted that above example is only to illustrate the technical solution of the utility model, rather than to this reality With the limitation of novel protected range, although being explained in detail to the utility model with reference to preferred embodiment, this field it is general Lead to it will be appreciated by the skilled person that can be modified or replaced equivalently to the technical solution of the utility model, without departing from this The spirit and scope of utility model technical solution.

Claims (6)

1. Include the pump housing with pump chamber and into and out of material mouth 1. a kind of polymer melt metering pump, feed inlet by feed cavity with Pump chamber communicates, and discharge port is communicated by discharging chamber with pump chamber；One power plant is fixed on the pump housing；It is set to institute A rotor that is in pump chamber and being rotatably supported on the pump housing is stated, which is sequentially connected with the power plant, The top of the pump housing and position placed in the middle offer a material chamber separation trough communicated with the charging and discharging chamber, in the material chamber The barrier sliding block for separating to charging and discharging chamber is provided in separation trough, which moves up and down in material chamber separation trough And the bottom surface for obstructing sliding block is touched with the rotor patch always, and barrier sliding block pressure is provided at the top of the pump housing Device, the barrier sliding block device for exerting are connect with the middle part of the length direction of the top surface of the barrier sliding block；Its feature exists In molten with polymer in pump chamber, feed inlet, discharge port, feed cavity, discharging chamber, material chamber separation trough, barrier sliding block and rotor Concave-convex anti-adhesion structure is both provided on the surface that body is in contact；The bumps anti-adhesion structure be it is equally distributed recess and it is convex It rises.
2. 2. polymer melt metering pump as described in claim 1, which is characterized in that the recess in the bumps anti-adhesion structure It spaced is uniformly distributed with protrusion；The surface area of protrusion is 0.5-2 square millimeters, and the surface area of recess is 1-3 square millimeters.
3. 3. polymer melt metering pump according to claim 2, which is characterized in that prolong in the center of the side of the rotor Stretching has a first axle, which is rotatably supported on the first pump cover, and the center of the other side of rotor is extended with one Two spindle noses, the second spindle nose are rotatably supported on the second pump cover.
4. 4. polymer melt metering pump according to claim 3, which is characterized in that the power plant include motor and Reduction box, motor is coupled with reduction box, and takes motor by reduction box and fixed with the second pump cover, the reduction gearbox output shaft of reduction box It is connect with the second spindle nose (32).
5. 5. polymer melt metering pump according to claim 4, which is characterized in that the barrier sliding block device for exerting packet Include a solid plate and an acting cylinder, acting cylinder be fixed in branch solid plate and with the length side of the top surface of the barrier sliding block To middle part be fixedly connected, and the branch solid plate and the top of the pump housing is fixed.
6. 6. polymer melt metering pump according to claim 5, which is characterized in that the rotor is cam follower.