CN221086192U - Piston type slurry extrusion assembly and continuous extrusion mechanism - Google Patents
Piston type slurry extrusion assembly and continuous extrusion mechanism Download PDFInfo
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- CN221086192U CN221086192U CN202322523567.4U CN202322523567U CN221086192U CN 221086192 U CN221086192 U CN 221086192U CN 202322523567 U CN202322523567 U CN 202322523567U CN 221086192 U CN221086192 U CN 221086192U
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- extrusion assembly
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- 239000002002 slurry Substances 0.000 title claims abstract description 95
- 238000001125 extrusion Methods 0.000 title claims abstract description 71
- 238000007599 discharging Methods 0.000 claims abstract description 25
- 238000003860 storage Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 4
- 238000003801 milling Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- 230000014759 maintenance of location Effects 0.000 abstract description 2
- 230000000712 assembly Effects 0.000 abstract 2
- 238000000429 assembly Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 229920001778 nylon Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
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Abstract
The utility model relates to a piston type slurry extrusion assembly and a continuous extrusion mechanism, wherein the extrusion assembly comprises a feed channel formed by serial connection of a feed one-way valve, a lead screw guide pipe push rod and an annular piston and a discharge channel formed by serial connection of a discharge one-way valve connected with a feed cylinder, the lead screw guide pipe push rod and the annular piston do linear motion in the feed cylinder through rotation of a lead screw nut of a driving motor, and slurry enters the feed cylinder through the feed channel and is extruded from the discharge channel; the continuous extrusion mechanism consists of two piston type slurry extrusion assemblies, a feeding pipeline, a discharging pipeline and a storage tank, and continuous slurry supply is realized by controlling the two piston type slurry extrusion assemblies to alternately work. The continuous slurry extrusion mechanism adopted by the utility model uses the driving motor to directly push the piston push rod, has simple structure and high control precision of slurry conveying; the slurry enters the charging barrel through the central hole of the annular piston and is extruded from the discharging pipeline according to the first-in first-out sequence, so that the high-viscosity slurry is prevented from forming local retention in the charging barrel.
Description
Technical Field
The utility model relates to the technical field of 3D printing and dispensing, in particular to a piston type slurry extrusion assembly and a continuous extrusion mechanism for continuously conveying high-viscosity slurry.
Background
In the prior art, slurry material conveying in the slurry 3D printing or dispensing field is usually carried out in a pneumatic driving mode, a screw driving mode, a piston driving mode and the like, a pneumatic driving feeding mechanism adopts an electric valve to control gas pressure to push slurry in a charging barrel to be extruded, high-precision control is difficult to carry out in pneumatic driving feeding due to the influences of different viscosities and materials of the slurry, and meanwhile, the charging barrel is required to be frequently replaced when a large amount of slurry is required to be conveyed due to the limitation of the volume of the charging barrel; the screw driving feeding mechanism drives slurry to extrude by virtue of a movable sealing cavity formed by rotating the screw in the bushing, so that the screw driving feeding mechanism is suitable for continuous conveying of a large amount of slurry, but because of a machining gap between the screw and the bushing, a small amount of backflow exists in the slurry in the conveying process, high-precision control is realized, the screw and the bushing with high precision are required to be machined, and the cost is high; the piston-driven feeding mechanism is suitable for accurately controlling the output of the slurry by changing the volume in the cylinder by virtue of the piston, but the cylinder is still required to be frequently replaced when a large amount of slurry is conveyed due to the limitation of the volume of the cylinder.
In order to solve the problem of continuously conveying a large amount of slurry by using a piston, the prior art generally adopts a structure that a feed one-way valve and a discharge one-way valve are connected at a feed cylinder outlet through a tee joint, and extrusion and supplementation of slurry in the feed cylinder are realized through reciprocating motion of the piston, but when high-viscosity slurry with weak fluidity is conveyed, because a gap exists between the end face of the piston and the feed cylinder outlet, part of air is remained on the end face of the piston to form cavitation, the control precision of slurry extrusion is difficult to remove when the feed cylinder sucks and extrudes the slurry, meanwhile, a small amount of slurry entering a gap area is difficult to pass through the piston to discharge the feed cylinder, so that long-term residence of part of slurry is formed, the feed cylinder is required to be regularly maintained and cleaned when the high-viscosity slurry with aging requirement is conveyed, and the maintenance cost and the selection limit of conveying materials are increased.
In view of the foregoing, there is still a disadvantage in the prior art in applying high-precision continuous conveying of high-viscosity slurry, and therefore, it is necessary to provide a slurry extrusion assembly and a continuous extrusion mechanism to overcome the drawbacks of the related art.
Disclosure of utility model
The utility model aims to solve the technical problem of providing a piston type slurry extrusion assembly and a continuous extrusion mechanism, which can continuously convey high-viscosity slurry with high precision.
In order to solve the technical problems, the utility model provides a piston type slurry extrusion assembly, which comprises a feeding one-way valve, a screw guide pipe push rod, a ring-shaped piston, a charging barrel, a discharging one-way valve and a driving motor for stopping rotation, and is characterized in that: the feeding one-way valve, the lead screw guide pipe push rod and the annular piston are connected in series to form a feeding channel; the discharge one-way valve is connected with the outlet of the charging barrel to form a discharge channel; the charging barrel is mechanically fixed on the outer side of the driving motor shell, and the annular piston is arranged in the charging barrel; the driving motor rotating shaft is a screw nut; the outer surface of the lead screw guide pipe push rod is provided with a lead screw groove matched with a lead screw nut in the driving motor and at least one milling flat surface or a key groove penetrating through two end surfaces along the axial side edge; the anti-rotation sliding sleeve and the screw nut are coaxially fixed on the outer side of the driving motor shell, a sliding surface matched with the outer contour of the cross section of the screw guide pipe push rod is arranged, the sliding surface is nested on the outer surface of the screw guide pipe push rod, and the sliding surface is used for preventing the screw guide pipe push rod from rotating and providing guidance for the linear sliding of the screw guide pipe push rod; the screw nut of the driving motor is nested on the outer surface of the screw guide pipe push rod, and the screw guide pipe push rod and the annular piston are driven to do linear reciprocating motion in the charging barrel through the screw nut in a rotating mode.
Further, the driving motor adopts a stepping motor or a servo motor.
Optionally, the feeding check valve and the discharging check valve adopt electric valves, when feeding, the feeding electric valve is opened, the discharging electric valve is closed, and when discharging, the discharging electric valve is opened, and the feeding electric valve is closed.
Optionally, a limit switch is arranged in the piston type slurry extrusion assembly and is used for detecting a limiting position of the linear motion of the spline lead screw guide pipe push rod.
The utility model also provides a piston type slurry continuous extrusion mechanism which comprises a first piston type slurry extrusion assembly, a second piston type slurry extrusion assembly, a feeding pipeline, a discharging pipeline, a three-way pipeline, a storage tank and a controller, wherein the feeding pipeline is connected between a feeding one-way valve of the first piston type slurry extrusion assembly and the second piston type slurry extrusion assembly and a discharge hole of the storage tank; the discharge check valves of the first piston type slurry extrusion assembly and the second piston type slurry extrusion assembly are connected to the first end and the second end of the three-way pipeline, and the discharge pipeline is connected to the third end of the three-way pipeline; the controller is electrically connected with the piston type slurry extrusion assembly and is used for driving the first piston type slurry extrusion assembly and the second piston type slurry extrusion assembly to alternately move so that the slurry is continuously extruded through the discharge pipeline without interruption.
Optionally, the storage tank adopts a pressurized storage tank, and an air source is configured to maintain the pressure in the storage tank.
By adopting the technical scheme, compared with the prior art, the utility model has the following advantages: 1) The slurry is extruded by adopting the piston driving feeding mechanism, so that the output can be accurately controlled, and meanwhile, the applicable viscosity range is wide; 2) Feeding from a piston push rod, enabling the slurry to enter a charging barrel through a ring-shaped piston center hole, extruding the slurry from a discharging pipeline according to a first-in first-out sequence when extruding and conveying the slurry with weak fluidity and high viscosity, and avoiding the slurry from forming local retention in the charging barrel; 3) The driving motor is adopted to directly drive the screw rod piston push rod, so that the assembly structure is simplified, the assembly and the manufacture are easy, and the manufacturing cost is reduced; 4) The double-piston extrusion assembly is adopted for alternate extrusion, so that continuous uninterrupted conveying of slurry can be realized, and the extrusion efficiency is high.
Drawings
Fig. 1 is a schematic cross-sectional structure of a piston type slurry extrusion assembly.
Fig. 2 is a schematic structural view of a rotation-stopping sliding sleeve and a lead screw guide push rod of a piston type slurry extrusion assembly.
Fig. 3 is a schematic diagram of a piston-type slurry extrusion assembly employing an electrically operated valve.
Fig. 4 is a schematic diagram of a piston type slurry continuous extrusion mechanism.
Fig. 5 is a schematic diagram of the mechanism of a piston-type slurry continuous extrusion machine employing a pressurized reservoir and an electrically operated valve.
In the figure: 100. a piston type slurry extrusion assembly; 10. a feed channel; 11. a feed check valve; 12. a lead screw guide pipe push rod; 13. a ring-shaped piston; 14. a helical groove; 15. milling a flat surface; 16. a key slot; 20. a charging barrel; 21. a discharge channel; 22. a discharge one-way valve; 30. a driving motor; 31. a motor rotor; 32. a lead screw nut; 33. a motor housing; 40. a rotation stopping sliding sleeve; 41. a sliding surface; 50. a limit switch; 51. a limit part; 60. a feed line; 61. a discharge pipeline; 62. a three-way pipeline; 70. a storage tank; 71. a pneumatic source; 80. an electric control device; 200. a first piston-type slurry extrusion assembly; 300. a second piston type slurry extrusion assembly.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific examples of embodiments: as shown in fig. 1 and 2, a piston type slurry extrusion assembly 100 according to the present utility model includes a feed channel 10, a barrel 20, a discharge channel 21, a driving motor 30, and a rotation stopping sliding sleeve 40.
The feeding channel 10 is formed by connecting a feeding one-way valve 11, a lead screw guide pipe push rod 12 and an annular piston 13 in series, the discharging channel 21 is formed by connecting an outlet of a charging barrel 20 with a discharging one-way valve 22, the charging barrel 20 is fixed on the outer side of a driving motor shell 33, the annular piston 13 is arranged in the charging barrel 20, a motor rotor 31 of a driving motor 30 is provided with a lead screw nut 32 in a rotating mode, the lead screw nut 32 of the driving motor 30 is nested on the outer surface of the lead screw guide pipe push rod 12, and the lead screw guide pipe push rod 12 and the annular piston 13 are driven to do linear reciprocating motion in the charging barrel 20 through rotation of the lead screw nut 32.
The outer surface of the lead screw guide push rod 12 is provided with a spiral groove 14 matched with a lead screw nut 32 in a driving motor 30 and a milling flat surface 15 (fig. 2 (a)) or a key groove 16 (fig. 2 (b)) penetrating through two end surfaces along the axial side; the anti-rotation sliding sleeve 40 and the screw nut 32 are coaxially fixed on the outer side of the driving motor shell 33, a sliding surface 41 matched with the outer profile of the cross section of the screw guide push rod 12 is arranged, and the sliding surface 41 is nested on the outer surface of the screw guide push rod 12 and used for preventing the screw guide push rod 12 from rotating and providing guidance for the linear sliding of the screw guide push rod 12.
The anti-rotation sliding sleeve 40 may be fixedly mounted on the outer side of the driving motor housing 33 by using flange type, screw type or other suitable mechanical connection means.
The sliding surface 41 of the anti-rotation sliding sleeve 40 can be made of self-lubricating materials such as polytetrafluoroethylene, oil-containing nylon, polyphenylene sulfide, polyether ether ketone, copper composite graphite, oil-containing powder metallurgy and the like.
In order to detect the limiting position of the linear motion of the push rod of the spline lead screw guide tube, a limit detection switch 50 can be arranged on the outer side of the driving motor shell 33, and a corresponding limit part 51 is arranged on the push rod of the lead screw guide tube.
The piston type slurry extrusion assembly can adopt an electric valve to replace the function of a one-way valve, as shown in fig. 3, the feeding one-way valve 11 and the discharging one-way valve 22 can adopt electric valves, the feeding electric valve is opened and the discharging electric valve is closed during feeding, and the discharging electric valve is opened and the feeding electric valve is closed during discharging.
As shown in fig. 4 and 5, a piston type slurry continuous extrusion mechanism according to the present utility model includes a first piston type slurry extrusion assembly 200, a second piston type slurry extrusion assembly 300, a feeding pipe 60, a discharging pipe 61, a three-way pipe 62, a storage tank 70, and an electric control device 80.
The feeding pipeline 60 is connected between the feeding check valves of the first piston type slurry extrusion assembly 200 and the second piston type slurry extrusion assembly 300 and the discharge port of the storage tank 70, the discharging check valves of the first piston type slurry extrusion assembly 200 and the second piston type slurry extrusion assembly 300 are connected at the first end and the second end of the three-way pipeline 62, the discharging pipeline 61 is connected at the third end of the three-way pipeline 62, the electric control device 80 is electrically connected with the driving motor 30 and the limit detection switch 50 of the piston type slurry extrusion assembly, and the electric control device is used for driving the first piston type slurry extrusion assembly 200 and the second piston type slurry extrusion assembly 300 to alternately move so that the slurry is continuously extruded without interruption through the discharging pipeline 61.
When the piston type slurry extrusion assembly adopts the electric valve to replace the one-way valve, the electric control device 80 is also connected with the electric control valve of the piston type slurry extrusion assembly for controlling the electric valve to open and close.
In order to reduce the flow resistance of the slurry in the conveying pipeline and reduce the load of the driving motor, the storage tank 70 adopts a pressurized storage tank, the air source 71 is configured to maintain the pressure in the storage tank 70, and the pressure range in the storage tank 70 is set to be smaller than the critical pressure value which enables the slurry to start overflowing the discharging pipeline 61 by relying on air pressure alone, so as to ensure that the slurry can only be extruded and sucked by the linear motion of the piston.
The foregoing is merely illustrative of the present utility model, and the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present utility model, and therefore, the scope of the present utility model shall be defined by the scope of the appended claims.
Claims (6)
1. The utility model provides a piston type thick liquids extrusion assembly, includes feeding check valve, lead screw pipe push rod, annular piston, feed cylinder, ejection of compact check valve, driving motor in order to stop changeing the sliding sleeve, its characterized in that: the feeding one-way valve, the lead screw guide pipe push rod and the annular piston are connected in series to form a feeding channel; the discharge one-way valve is connected with the outlet of the charging barrel to form a discharge channel; the charging barrel is mechanically fixed on the outer side of the driving motor shell, and the annular piston is arranged in the charging barrel; the driving motor rotating shaft is a screw nut; the outer surface of the lead screw guide pipe push rod is provided with a lead screw groove matched with a lead screw nut in the driving motor and at least one milling flat surface or a key groove penetrating through two end surfaces along the axial side edge; the anti-rotation sliding sleeve is coaxial with the screw nut and is fixed on the outer side of the driving motor shell, a sliding surface matched with the outer contour of the cross section of the screw guide pipe push rod is arranged, the sliding surface is nested on the outer surface of the screw guide pipe push rod, and the sliding surface is used for preventing the screw guide pipe push rod from rotating and providing guidance for the linear sliding of the screw guide pipe push rod; the screw nut of the driving motor is nested on the outer surface of the screw guide pipe push rod, and the screw guide pipe push rod and the annular piston are driven to do linear reciprocating motion in the charging barrel through the screw nut in a rotating mode.
2. A piston type slurry extrusion assembly as set forth in claim 1, wherein: the driving motor adopts a stepping motor or a servo motor.
3. A piston type slurry extrusion assembly as set forth in claim 1, wherein: the feeding check valve and the discharging check valve are electric valves, the feeding electric valve is opened when feeding, the discharging electric valve is closed, and the discharging electric valve is opened when discharging, and the feeding electric valve is closed.
4. A piston type slurry extrusion assembly as set forth in claim 1, wherein: the drive motor shell outside is equipped with limit detection switch, lead screw pipe push rod is provided with supporting spacing portion for detect spline lead screw pipe push rod rectilinear movement's limit position.
5. A piston type slurry continuous extrusion mechanism, comprising a piston type slurry extrusion assembly according to the first claim 1, a piston type slurry extrusion assembly according to the second claim 1, a feeding pipeline, a discharging pipeline, a three-way pipeline, a storage tank and an electric control device, and is characterized in that: the feeding pipeline is connected between the piston type slurry extrusion assembly of the first claim 1 and the feeding one-way valve and the discharge hole of the storage tank of the piston type slurry extrusion assembly of the second claim 1; the piston type slurry extrusion assembly of the first claim 1 and the discharge check valve of the piston type slurry extrusion assembly of the second claim 1 are connected to the first end and the second end of the three-way pipeline, and the discharge pipeline is connected to the third end of the three-way pipeline; the electric control device is electrically connected with a driving motor of the piston type slurry extrusion assembly and a limit detection switch and is used for driving the piston type slurry extrusion assembly according to the first claim 1 and the piston type slurry extrusion assembly according to the second claim 1 to alternately move so that slurry is continuously extruded through the discharge pipeline without interruption.
6. A piston type slurry continuous extrusion mechanism according to claim 5, wherein: the storage tank adopts a pressurized storage tank, and an air source is configured to maintain the pressure in the storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322523567.4U CN221086192U (en) | 2023-09-18 | 2023-09-18 | Piston type slurry extrusion assembly and continuous extrusion mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322523567.4U CN221086192U (en) | 2023-09-18 | 2023-09-18 | Piston type slurry extrusion assembly and continuous extrusion mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221086192U true CN221086192U (en) | 2024-06-07 |
Family
ID=91319570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322523567.4U Active CN221086192U (en) | 2023-09-18 | 2023-09-18 | Piston type slurry extrusion assembly and continuous extrusion mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221086192U (en) |
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2023
- 2023-09-18 CN CN202322523567.4U patent/CN221086192U/en active Active
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