CN112973484B - Viscous medium preparation device and viscous medium preparation method - Google Patents
Viscous medium preparation device and viscous medium preparation method Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/47—Mixing liquids with liquids; Emulsifying involving high-viscosity liquids, e.g. asphalt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
- B01F25/451—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by means for moving the materials to be mixed or the mixture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
- B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
- B01F25/4521—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through orifices in elements, e.g. flat plates or cylinders, which obstruct the whole diameter of the tube
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
- B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
- B01F25/4522—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through porous bodies, e.g. flat plates, blocks or cylinders, which obstruct the whole diameter of the tube
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/712—Feed mechanisms for feeding fluids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
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Abstract
The application provides a viscous medium preparation device and a preparation method of a viscous medium, wherein the viscous medium preparation device comprises: the device comprises a medium bin, a push rod, a fine hole plate, an extrusion die and a pressure sensor. The fine pore plate is arranged between the extrusion die and the medium bin and is positioned at the discharge port, and a plurality of through holes are formed in the fine pore plate. The extrusion die has a mixing channel, and the caliber of the inlet of the mixing channel is larger than that of the outlet of the mixing channel. The pressure sensor is arranged on the extrusion die and used for detecting the pressure at the outlet of the mixing channel of the extrusion die. The application provides a viscous medium preparation facilities mixes the modulation many times through the mixing passage of orifice plate and extrusion die, simple structure, and easy operation can adjust the proportion between the viscous medium of different molecular weights as required to modulate out the viscous medium of different performance, in order to satisfy different shaping demands.
Description
Technical Field
The application relates to the technical field of viscous media, in particular to a viscous medium preparation device and a viscous medium preparation method.
Background
Viscous medium pressure forming is a soft mold forming method developed in recent years, and adopts a high polymer material (viscous medium) as a force transmission medium, wherein the high polymer material has the characteristics of semi-solid state, flowability, certain viscosity and strain rate sensitivity. The non-uniform pressure distribution and tangential viscous attachment stress in viscous medium deformation are important mechanical properties which are different from other soft molds, and are closely related to the viscous medium material performance, so that the selection of viscous medium with proper molecular weight is the key of viscous medium pressure forming. The molecular weight of the viscous medium produced by the standard is fixed, the selectable range is limited, and the forming requirement of parts which are increasingly complex cannot be met, so that the viscous medium with different properties needs to be tempered aiming at forming parts with different structural characteristics.
Disclosure of Invention
The viscous medium preparation device and the viscous medium preparation method are simple in structure and easy to operate.
To achieve at least one of the above objects, an embodiment of a first aspect of the present application provides a viscous medium preparation apparatus including: the medium bin is provided with a discharge hole and an accommodating cavity for accommodating viscous medium; a push rod disposed within the containment chamber and movable relative to the media cartridge; the fine pore plate is connected with the medium bin and positioned at the discharge port, and a plurality of through holes are formed in the fine pore plate; the extrusion die is connected with the fine pore plate and is provided with a mixing channel, an inlet of the mixing channel is arranged corresponding to the discharge port, and the caliber of the inlet of the mixing channel is larger than that of an outlet of the mixing channel; and the pressure sensor is arranged on the extrusion die and used for detecting the pressure at the outlet of the mixing channel.
In some embodiments, the mixing channel comprises an extrusion section and a mixing section which are connected in sequence, the inlet is located in the extrusion section, and the outlet is located in the mixing section;
the bore diameter of the extrusion section decreases in a direction from the inlet to the outlet of the mixing channel.
In some of the embodiments, the cross section of the extrusion section is trapezoidal, and the included angle between two waists of the trapezoid is 30-60 degrees.
In some of these embodiments, the viscous medium preparation apparatus further comprises: the material injection channels are fixed on the medium bin and arranged along the circumferential direction of the medium bin, and the material injection channels are communicated with the accommodating cavity; and the pressing rods are respectively arranged in the plurality of material injection channels and can move relative to the material injection channels.
In some embodiments, the plurality of injection channels have different apertures, and the apertures of the injection channels are 5mm to 35 mm.
In some of these embodiments, the injection port of the injection channel is in communication with the receiving cavity, and the injection port includes a plurality of sub-apertures.
In some of these embodiments, the aperture of the through-hole is 0.05mm to 0.2 mm; the aperture ratio of the through hole on the pore plate is 60-80%.
Embodiments of the second aspect of the present application provide a method for preparing a viscous medium, comprising the steps of:
establishing prestored data corresponding to the rate sensitivity index and the pressure value in the extrusion process of the viscous medium;
injecting viscous media with different molecular weights into the media bin according to a set proportion;
applying pressure to the viscous medium through the push rod, wherein the viscous medium enters the mixing channel of the extrusion die through the fine pore plate and is discharged from an outlet of the mixing channel;
collecting the mixed viscous medium discharged from the outlet of the mixing channel;
adding the mixed viscous medium into the medium bin again, and repeating the two steps to repeatedly mix until the pressure in the mixing channel is stable and unchanged to obtain the final viscous medium;
and matching the finally measured pressure value in the mixing channel with the prestored data to obtain the final rate sensitivity index of the viscous medium.
In some embodiments, the injecting viscous media with different molecular weights into the media bin according to a set ratio includes the following steps:
adding viscous media with different molecular weights into different material injection channels according to a set proportion;
and injecting the viscous media with different molecular weights into the medium bin through a pressure rod in the injection channel.
In some of these embodiments, the pore size of the injection channels into which viscous media of different molecular weights are injected is different; the aperture of the material injection channel into which viscous media with the molecular weight of 100 kg/mol-350 kg/mol are injected is 5-12 mm; the pore diameter of the material injection channel into which the viscous medium with the molecular weight of 400 kg/mol-650 kg/mol is injected is 13-22 mm; the aperture of the material injection channel for injecting the viscous medium with the molecular weight of 700 kg/mol-900 kg/mol is 23-35 mm.
The above technical scheme of this application has following advantage: the viscous medium in the medium bin is divided into a plurality of strands of filamentous viscous media by the pore plate to enter the mixing channel, the contact area between the viscous media with different molecular weights is increased, so that the viscous media with different molecular weights are in full contact, the viscous media with different molecular weights are guaranteed to be fully mixed, the strands of viscous media are fully extruded through the mixing channel with the caliber of the inlet larger than that of the outlet, the viscous media are further fully mixed, the viscous media with different molecular weights are guaranteed to be fully mixed uniformly, and when the viscous media with different molecular weights are uniformly mixed, the pressure value detected by the pressure sensor is stable and unchanged. In addition, the viscous medium preparation device and the preparation method are used for mixing and modulating for many times through the mixing channel of the fine pore plate and the extrusion die, the structure is simple, the operation is easy, and the proportion of viscous media with different molecular weights can be adjusted according to needs, so that viscous media with different properties can be modulated to meet different forming requirements.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration only and are not necessarily drawn to scale or quantity with respect to the actual product. Wherein:
FIG. 1 is a schematic illustration of a cross-sectional view of a first embodiment of an apparatus for preparing viscous medium according to the present application;
FIG. 2 is a schematic diagram of the construction of a fine pore plate according to the present application;
FIG. 3 is a schematic diagram of a cross-sectional structure of a second embodiment of an apparatus for preparing viscous medium according to the present application;
FIG. 4 is a schematic diagram of a top view of a second embodiment of an apparatus for preparing viscous medium according to the present application;
FIG. 5 is a schematic cross-sectional view of a third embodiment of an apparatus for preparing viscous medium according to the present application;
fig. 6 to 8 are schematic views illustrating the operation state of the viscous medium preparation apparatus shown in fig. 3.
Wherein, the correspondence between the reference numbers and the part names of fig. 1 to 8 is:
the device comprises a medium bin 10, a push rod 20, a fine pore plate 30, a through hole 31, an extrusion die 40, a mixing channel 41, an extrusion section 411, a mixing section 412, a pressure sensor 50, an injection channel 60, a sub-hole 61, a pressure rod 70 and a viscous medium 80.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The following discussion provides a number of embodiments of the application. While each embodiment represents a single combination of applications, the various embodiments of the application can be substituted or combined in any combination, and thus this application is intended to cover all possible combinations of the same and/or different embodiments described. Thus, if one embodiment comprises A, B, C and another embodiment comprises a combination of B and D, then this application should also be considered to comprise an embodiment that comprises A, B, C, D in all other possible combinations, although this embodiment may not be explicitly recited in the text below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those specifically described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.
As shown in fig. 1, an embodiment of the first aspect of the present application provides a viscous medium preparation apparatus, including: media cartridge 10, pushrod 20, fine orifice plate 30, extrusion die 40, and pressure sensor 50.
The media cartridge 10 has a discharge port and a receiving chamber for receiving the viscous medium 80.
The push rod 20 is disposed within the receiving cavity and is movable relative to the media cartridge 10.
As shown in fig. 1 and 2, the fine pore plate 30 is connected to the media bin 10 and located at the discharge port, and a plurality of through holes 31 are formed in the fine pore plate 30.
The extrusion die 40 is connected to the fine pore plate 30, the extrusion die 40 has a mixing channel 41, an inlet of the mixing channel 41 is disposed corresponding to the discharge port, and a diameter of the inlet of the mixing channel 41 is larger than a diameter of the outlet of the mixing channel 41.
A pressure sensor 50 is provided on the extrusion die 40 for detecting the pressure at the outlet of the mixing channel 41. The operator can know the internal pressure of the viscous medium 80 in the mixing channel 41 in real time based on the pressure value detected by the pressure sensor 50.
The application provides a viscous medium preparation facilities carries out mixing modulation many times through the mixing channel 41 of pore board 30 and extrusion die 40, simple structure, and easy operation can adjust the proportion between the viscous medium 80 of different molecular weights as required to modulate out viscous medium 80 of different performance, in order to satisfy different shaping demands. Specifically, under the action of pressure, the viscous medium 80 has better fluidity, pressure is applied to the viscous medium 80 in the medium bin 10 through the push rod 20, so that the viscous media 80 with multiple molecular weights are mixed, after the viscous medium 80 in the medium bin passes through the fine pore plate 30, the viscous medium 80 in the medium bin is divided into multiple strands of fine-thread-shaped viscous media 80 by the fine pore plate 30 to enter the mixing channel 41, the contact area between the viscous media 80 with different molecular weights is increased, so that the viscous media 80 with different molecular weights are in full contact, the viscous media 80 with different molecular weights are guaranteed to be fully mixed, the multiple strands of viscous media 80 are fully extruded through the mixing channel 41 with the caliber of the inlet larger than that of the outlet, the viscous media 80 with different molecular weights are further fully mixed, when the viscous media 80 with different molecular weights are uniformly mixed, the pressure value detected by the pressure sensor 50 is stable and unchanged.
As shown in fig. 1, in one embodiment of the present application, the mixing channel 41 includes an extruding section 411 and a mixing section 412 connected in series.
The inlet is located in the extruder stage 411 and the outlet is located in the mixing stage 412.
The diameter of the extruding section 411 gradually decreases in the direction from the inlet to the outlet of the mixing channel 41, i.e. the extruding section 411 is a tapered hole.
The viscous medium 80 divided into a plurality of strands by the fine pore plate 30 firstly enters the extruding section 411, the plurality of strands of viscous medium 80 are fully extruded and mixed by the extruding section 411 with gradually reduced pore diameter, then the viscous medium 80 enters the mixing section 412, and the extruding section 411 ensures that the viscous media 80 with different molecular weights are fully and uniformly mixed. After the viscous medium 80 enters the mixing section 412, a certain pressure is formed, the pressures of the viscous media 80 with different molecular weights in the mixing section 412 are different, when the viscous media 80 with different molecular weights are insufficiently mixed, the pressure value in the mixing section 412 fluctuates during repeated extrusion, when the viscous media 80 with different molecular weights are uniformly mixed, the pressure value in the mixing section 412 is kept unchanged, and when the pressure sensor 50 detects that the pressure value of the mixing section 412 is stable and unchanged, it is determined that the viscous media 80 with different molecular weights are sufficiently mixed.
As shown in fig. 1, in one embodiment of the present application, the cross-sectional shape of the extruded section 411 is trapezoidal in a cross-section of the axis of the over-extruded section 411, and an included angle α between two waists of the trapezoid is 30 ° to 60 °. If the included angle alpha between the two waists is smaller than 30 degrees, the extrusion section 411 is longer, and if the included angle alpha between the two waists is larger than 60 degrees, the extrusion section 411 is shorter, so that the included angle alpha between the two trapezoidal waists is within 30-60 degrees, the length of the extrusion section 411 is moderate, the viscous media 80 with different molecular weights are fully contacted, and the viscous media 80 with different molecular weights are fully mixed.
As shown in fig. 3, in one embodiment of the present application, the viscous medium preparation apparatus further includes: a plurality of injection channels 60 and a plurality of compression rods 70.
The material injection channel 60 is fixed on the medium bin 10 and arranged along the circumferential direction of the medium bin 10, and the material injection channel 60 is communicated with the accommodating cavity. In one embodiment of the present application, the number of the injection channels 60 is 4 to 10.
The plurality of pressing rods 70 are respectively arranged in the plurality of injection channels 60, and the pressing rods 70 can move relative to the injection channels 60.
When the viscous media 80 with different molecular weights are added, the viscous media 80 with different molecular weights are added into the plurality of material injection channels 60 respectively, then the pressure rods 70 in the plurality of material injection channels 60 are started simultaneously, so that the viscous media 80 with different molecular weights enter the medium bin 10 simultaneously, the contact area between the viscous media 80 with different molecular weights is increased, namely, the viscous media 80 with different molecular weights are ensured to be fully contacted, and the viscous media 80 with different molecular weights are ensured to be fully mixed.
As shown in fig. 4, in an embodiment of the present application, the aperture D of the plurality of injection channels 60 is different, and the aperture D of the injection channel 60 is 5mm to 35 mm. In the specific embodiment of the present application, the diameter D of the injection passage 60 into which the viscous medium 80 having a molecular weight of 100kg/mol to 350kg/mol is injected is 5mm to 12 mm. The aperture D of the injection channel 60 into which the viscous medium 80 with the molecular weight of 400 kg/mol-650 kg/mol is injected is 13-22 mm. The aperture D of the injection channel 60 into which the viscous medium 80 with the molecular weight of 700 kg/mol-900 kg/mol is injected is 23-35 mm. The larger the molecular weight is, the larger the viscosity of the viscous medium 80 is, the viscous medium 80 with larger viscosity is injected into the injection channel 60 with larger aperture D, and the viscous medium 80 is extruded by the pressure rod 70, so that the viscous media 80 in the multiple injection channels 60 simultaneously enter the medium bin 10, the viscous media 80 with different molecular weights are in full contact, and the viscous media 80 with different molecular weights are fully mixed.
As shown in fig. 5, in one embodiment of the present application, the injection port of the injection channel 60 communicates with the receiving cavity, and the injection port includes a plurality of sub-holes 61.
The viscous medium 80 entering the medium bin 10 from the material injection channel 60 is divided into a plurality of strands of viscous media 80 by the plurality of sub-holes 61, and the plurality of strands of viscous media 80 increase the contact area between the viscous media 80 with different molecular weights, so that the viscous media 80 with different molecular weights are in full contact, and the viscous media 80 with different molecular weights are fully mixed.
As shown in fig. 6, in one embodiment of the present application, the aperture Φ of the through-hole 31 is 0.05mm to 0.2 mm. If the aperture phi of the through hole 31 is smaller than 0.05mm, the aperture phi of the through hole 31 is smaller, and the through hole 31 is easily blocked. If the aperture diameter of the through-hole 31 is larger than 0.2mm, the aperture diameter of the through-hole 31 is larger, and the surface area of the plurality of strands of the viscous medium 80 divided by the through-hole 31 is smaller, resulting in an increase in the mixing time of the viscous medium 80. Therefore, the aperture phi of the through hole 31 is within 0.05 mm-0.2 mm, which can ensure that the multiple strands of viscous media 80 divided by the through hole 31 have larger surface areas, i.e. the contact areas between the multiple strands of viscous media 80 are ensured, thereby ensuring that the viscous media 80 with different molecular weights are fully contacted, and ensuring that the viscous media 80 with different molecular weights are fully mixed.
As shown in fig. 1 and 2, in one embodiment of the present application, the opening ratio of the through-hole 31 on the fine pore plate 30 is 60% to 80%. If the opening ratio of the through-holes 31 is less than 60%, the number of the through-holes 31 is small, and the surface area of the plurality of strands of the viscous medium 80 divided by the through-holes 31 is small, resulting in an increase in the mixing time of the viscous medium 80. If the aperture ratio of the through hole 31 is less than 80%, the overall strength of the fine pore plate 30 is low, and the fine pore plate 30 is easily damaged, so that the aperture ratio of the through hole 31 is between 60% and 80%, and under the condition that the overall strength of the fine pore plate 30 is ensured, the multi-strand viscous medium 80 divided by the through hole 31 can be ensured to have a large surface area, that is, the contact area between the multi-strand viscous medium 80 is ensured, so that the viscous media 80 with different molecular weights are fully contacted, and the viscous media 80 with different molecular weights are fully mixed.
The opening ratio is the ratio of the total area of the through holes 31 in the fine-pore plate 30 to the area of the opening area, i.e., K is a0/Aa formula: k-percent open area (%); A0-Total area (m) of through-holes 31 in Fine-meshed plate 302) (ii) a Aa-area of open area (m)2)。
The procedure for preparing viscous medium using the viscous medium preparation apparatus is described with reference to the examples:
example one
As shown in fig. 6 to 8, the medium bin 10 is provided with 6 injection channels 60, three kinds of viscous media 80 with molecular weights of 100kg/mol, 300kg/mol and 900kg/mol are respectively loaded into the 6 injection channels 60 according to a ratio of 4:5:1, that is, every two injection channels 60 are injected with the viscous media 80 with the same molecular weight, the pressure rods 70 in the 6 injection channels are started to inject the viscous media 80 into the medium bin 10, and in the process of injecting the viscous media 80, the viscous media 80 integrated into a cluster by the injection channels 60 are changed into thread-shaped viscous media 80 by the plurality of sub-holes 61 of the injection port, so that the contact area between the viscous media 80 with different molecular weights is increased, and the viscous media 80 with multiple molecular weights are primarily mixed in the medium bin 10; after the viscous medium 80 is injected into the medium bin 10, the viscous medium 80 in the medium bin 10 is pressed into the mixing channel 41 of the extrusion die 40 through the push rod 20, in the process of extruding the viscous medium 80, the fine pore plate 30 changes the viscous medium 80 gathered into a cluster in the medium bin 10 into a filament shape to be injected into the mixing channel 41, so that the contact area between the viscous media 80 with different molecular weights is increased, thereby further mixing the viscous media 80 with multiple molecular weights in the mixing channel 41, collecting the viscous medium 80 discharged from the mixing channel 41, and repeatedly mixing the viscous medium 80 discharged from the mixing channel 41 for several times through the viscous medium preparation device until the pressure in the mixing channel 41 is stable and unchanged to obtain the final viscous medium 80, wherein the molecular weight of the viscous medium 80 is 480 kg/mol.
Example two
As shown in fig. 6 to 8, the medium bin 10 is provided with 3 injection channels 60, three kinds of viscous media 80 with molecular weights of 200kg/mol, 700kg/mol and 800kg/mol are respectively loaded into the 3 injection channels 60 according to the ratio of 3:3:4, the pressure rods 70 in the 3 injection channels are started, the viscous media 80 are injected into the medium bin 10, in the process of injecting the viscous media 80, the viscous media 80 which are gathered into a cluster in the injection channels 60 are changed into filaments by the sub-holes 61 of the injection ports to be injected into the medium bin 10, so that the contact area between the viscous media 80 with different molecular weights is increased, and the viscous media 80 with different molecular weights are primarily mixed in the medium bin 10; after the viscous medium 80 is injected into the medium bin 10, the viscous medium 80 in the medium bin 10 is pressed into the mixing channel 41 of the extrusion die 40 through the push rod 20, during the process of extruding the viscous medium 80, the fine pore plate 30 changes the viscous medium 80 gathered into a lump in the medium bin 10 into a filament shape and injects the filament shape into the mixing channel 41, so that the contact area between the viscous media 80 with different molecular weights is increased, thereby further mixing the viscous media 80 with multiple molecular weights in the mixing channel 41, collecting the viscous medium 80 discharged from the mixing channel 41, and repeatedly mixing the viscous medium 80 discharged from the mixing channel 41 for several times through the viscous medium preparation device until the pressure in the mixing channel 41 is stable and constant to obtain the final viscous medium 80, wherein the molecular weight of the viscous medium 80 is 590 kg/mol.
As shown in fig. 6 to 8, an embodiment of the second aspect of the present application provides a method for preparing a viscous medium, including the following steps:
and step S10, establishing prestored data corresponding to the rate sensitivity index and the pressure value of the viscous medium extrusion process. Specifically, simulation analysis is carried out on the extrusion process of viscous media with different molecular weights, the pressure sensor is used for measuring the internal pressure value when the viscous media with different molecular weights are extruded, and then the numerical simulation result of the extrusion process of the viscous media is matched with the pressure value measured by the pressure sensor to establish prestored data.
As shown in fig. 6 and 7, in step S20, viscous media 80 with different molecular weights are injected into the media cartridge 10 according to a set ratio.
In step S30, as shown in fig. 8, pressure is applied to the viscous medium 80 by the push rod 20, and the viscous medium 80 enters the mixing passage 41 of the extrusion die 40 through the fine pore plate 30 and is discharged from the outlet of the mixing passage 41.
In step S40, the mixed viscous medium 80 discharged from the outlet of the mixing passage 41 is collected.
Step S50, re-adding the mixed viscous medium 80 into the medium bin 10, and repeating step S30 and step S40 to repeat mixing until the pressure in the mixing channel 41 is stable and unchanged, so as to obtain the final viscous medium 80.
And step S60, matching the pressure value in the mixing channel 41 which is measured finally with prestored data to obtain the final speed sensitivity index of the viscous medium 80.
According to the viscous medium preparation method, mixing and modulation are carried out for multiple times through the fine pore plate 30 and the mixing channel 41 of the extrusion die 40, the operation is simple, the execution is easy, and the proportion of the viscous media 80 with different molecular weights can be adjusted according to the requirements, so that the viscous media 80 with different properties can be modulated to meet different forming requirements. Specifically, under the action of pressure, the viscous medium 80 has better fluidity, pressure is applied to the viscous medium 80 in the medium bin 10 through the push rod 20, so that the viscous media 80 with multiple molecular weights are mixed, after the viscous medium 80 in the medium bin passes through the fine pore plate 30, the viscous medium 80 in the medium bin is divided into multiple strands of thread-shaped viscous media 80 by the fine pore plate 30 and enters the mixing channel 41, the contact area between the viscous media 80 with different molecular weights is increased, so that the viscous media 80 with different molecular weights are in full contact, the viscous media 80 with different molecular weights are guaranteed to be fully mixed, and when the viscous media 80 with different molecular weights are uniformly mixed, the pressure in the mixing channel 41 is stable and unchanged.
As shown in fig. 6, in an embodiment of the present application, step S20 includes the following steps:
in step S21, the viscous media 80 with different molecular weights are added into different injection channels 60 according to the set ratio.
In step S22, the viscous medium 80 with different molecular weights is injected into the medium bin 10 through the pressing rod 70 in the injection channel 60.
When the viscous media 80 with different molecular weights are added, the viscous media 80 with different molecular weights are added into the plurality of material injection channels 60 respectively, and then the pressing rods 70 in the plurality of material injection channels 60 are started simultaneously, so that the viscous media 80 with different molecular weights enter the medium bin 10 simultaneously, the contact area between the viscous media 80 with different molecular weights is increased, namely, the viscous media 80 with different molecular weights are ensured to be fully contacted, and the viscous media 80 with different molecular weights are ensured to be fully mixed.
As shown in fig. 4, in one embodiment of the present application, the pore diameters D of the injection passages 60 into which the viscous medium 80 of different molecular weights is injected are different. Specifically, the aperture D of the material injection channel 60 into which the viscous medium 80 with the molecular weight of 100 kg/mol-350 kg/mol is injected is 5-12 mm; the aperture D of the injection channel 60 into which the viscous medium 80 with the molecular weight of 400 kg/mol-650 kg/mol is injected is 13-22 mm; the aperture D of the injection channel 60 into which the viscous medium 80 with the molecular weight of 700 kg/mol-900 kg/mol is injected is 23-35 mm.
The larger the molecular weight is, the larger the viscosity of the viscous medium is, the viscous medium with larger viscosity is injected into the injection channel with larger aperture, and the viscous medium is extruded by the compression rod, so that the viscous media in the multiple injection channels simultaneously enter the medium bin, the viscous media with different molecular weights are fully contacted, and the full mixing of the viscous media with different molecular weights is ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application. In this application, the term "plurality" means two or more unless explicitly defined otherwise. In the present application, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
In the description of the specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (3)
1. A viscous medium preparation apparatus, comprising:
the medium bin is provided with a discharge hole and an accommodating cavity for accommodating viscous medium;
a push rod disposed within the containment chamber and movable relative to the media cartridge;
the fine pore plate is connected with the medium bin and positioned at the discharge port, and a plurality of through holes are formed in the fine pore plate;
the extrusion die is connected with the fine pore plate and is provided with a mixing channel, an inlet of the mixing channel is arranged corresponding to the discharge port, and the caliber of the inlet of the mixing channel is larger than that of an outlet of the mixing channel; and
the pressure sensor is arranged on the extrusion die and used for detecting the pressure at the outlet of the mixing channel, and when viscous media with different molecular weights are uniformly mixed, the pressure value detected by the pressure sensor is stable and unchanged;
further comprising: the material injection channels are fixed on the medium bin and arranged along the circumferential direction of the medium bin, and the material injection channels are communicated with the accommodating cavity; and
the pressing rods are respectively arranged in the material injection channels and can move relative to the material injection channels;
the aperture of the plurality of material injection channels is different, and the aperture of the material injection channels is 5 mm-35 mm;
the pore diameters of the material injection channels into which viscous media with different molecular weights are injected are different;
the aperture of the material injection channel into which viscous media with the molecular weight of 100 kg/mol-350 kg/mol are injected is 5-12 mm;
the aperture of the material injection channel into which the viscous medium with the molecular weight of 400 kg/mol-650 kg/mol is injected is 13-22 mm;
the aperture of the material injection channel into which the viscous medium with the molecular weight of 700 kg/mol-900 kg/mol is injected is 23-35 mm;
an injection port of the injection channel is communicated with the accommodating cavity and comprises a plurality of sub-holes;
the aperture of the through hole is 0.05 mm-0.2 mm;
the opening rate of the through holes on the fine-hole plate is 60% -80%;
the mixing channel comprises an extrusion section and a mixing section which are sequentially connected, the inlet is positioned in the extrusion section, and the outlet is positioned in the mixing section;
the pore diameter of the extrusion section is gradually reduced in the direction from the inlet to the outlet of the mixing channel;
on the section passing through the axial line of the extrusion section, the section of the extrusion section is trapezoidal, and the included angle between two waists of the trapezoid is 30-60 degrees.
2. A method for preparing a viscous medium, which is applied to the viscous medium preparation apparatus according to claim 1, comprising the steps of:
s10, establishing prestored data corresponding to the rate sensitivity index and the pressure value in the extrusion process of the viscous medium;
s20, injecting viscous media with different molecular weights into the media bin according to a set proportion;
s30, applying pressure to the viscous medium through the push rod, wherein the viscous medium enters the mixing channel of the extrusion die through the fine pore plate and is discharged from the outlet of the mixing channel;
s40, collecting the mixed viscous medium discharged from the outlet of the mixing channel;
s50, adding the mixed viscous medium into the medium bin again, and repeating the step S30 and the step S40 to repeatedly mix until the pressure in the mixing channel is stable and unchanged to obtain the final viscous medium;
and S60, matching the pressure value in the mixing channel which is measured finally with the prestored data to obtain the final velocity sensitivity index of the viscous medium.
3. The production method according to claim 2,
the step of injecting the viscous media with different molecular weights into the media bin according to the set proportion comprises the following steps:
adding viscous media with different molecular weights into different material injection channels according to a set proportion;
and injecting the viscous media with different molecular weights into the medium bin through a pressure rod in the injection channel.
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