CN112895427A - Extrusion type 3D printing nozzle for processing high-viscosity slurry - Google Patents
Extrusion type 3D printing nozzle for processing high-viscosity slurry Download PDFInfo
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- CN112895427A CN112895427A CN202110188833.5A CN202110188833A CN112895427A CN 112895427 A CN112895427 A CN 112895427A CN 202110188833 A CN202110188833 A CN 202110188833A CN 112895427 A CN112895427 A CN 112895427A
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- charging
- slurry
- sealing shell
- extrusion
- viscosity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/209—Heads; Nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/295—Heating elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Coating Apparatus (AREA)
Abstract
The invention discloses an extrusion type 3D printing nozzle for processing high-viscosity slurry, which comprises a pressure transmission assembly, a heating sealing shell assembly and a charging assembly, wherein the pressure transmission assembly is arranged on the heating sealing shell assembly; the pressure transmission assembly comprises a pressure hose, a threaded push rod and a rubber push head, one end of the pressure hose is connected with the pressurizing device, the other end of the pressure hose is fixedly connected with the threaded push rod and used for driving the threaded push rod to move up and down in the charging tube, and the rubber push head is arranged at the bottom of the threaded push rod; the heating sealing shell assembly comprises an external sealing shell, a heat preservation layer and a heating layer, wherein the external sealing shell is arranged on the outermost layer, the heat preservation layer is arranged in the middle, and the heating layer is arranged inside the external sealing shell; the charging assembly is positioned in the heating sealing shell assembly and comprises a fixing device, a charging pipe and a feeding spray head, the charging pipe is used for charging high-viscosity slurry, the fixing device is sleeved on the periphery of the charging pipe and fixes the charging pipe in the heating layer, and the feeding spray head is used for spraying the slurry. The invention improves the extrusion uniformity of the slurry material, improves the processing quality of the sample piece and has wide application prospect.
Description
Technical Field
The invention relates to the field of machining, in particular to an extrusion type 3D printing nozzle for high-viscosity slurry machining.
Background
3D printing technology, by its very nature of additive manufacturing, is currently considered to have great potential for application in a number of different fields. Thus, the technology is currently receiving attention from numerous fields of biomedical, aerospace, integrated circuits, microelectronics, and the like.
Extrusion additive manufacturing is a process that uses pressure or self-gravity to move through a filler tube to a nozzle and then extrudes material onto a table. An operator controls the slurry extrusion speed by controlling parameters such as the pressure of the spray head, the viscosity of the slurry, the size of the spray head and the like, and controls the moving speed of the translation table on the basis to realize additive manufacturing and processing of the slurry on the workbench. In the processing process, the real-time sintering of the slurry material is realized by means of ultraviolet light, a laser, a temperature-sensitive gasket and the like by combining the self attribute of the processed slurry material, so that the processing quality reduction caused by slurry flowing is prevented.
Although the extrusion additive manufacturing technology has a wide application prospect, the technology is immature due to the late generation of the technology, and therefore further optimization of partial components in the process is needed. The application of the process is mainly used for processing ceramic materials in the market at present, but the application of the process to fields with larger demands, such as microelectronics, micro energy sources and the like, is severely limited due to the problems of low processing precision, insufficient sintering strength and the like.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to solve the problems of low processing precision, complex device structure and difficulty in controlling the volume and precision of processing materials in the prior art, provides an extrusion type 3D printing nozzle for processing high-viscosity slurry, improves the printing precision of the high-viscosity slurry and widens the application range.
The technical scheme is as follows: the invention provides an extrusion type 3D printing nozzle for processing high-viscosity slurry, which comprises a pressure transmission assembly, a heating sealing shell assembly and a charging assembly, wherein the pressure transmission assembly is arranged on the heating sealing shell assembly;
the pressure transmission assembly comprises a pressure hose, a threaded push rod and a rubber push head, one end of the pressure hose is connected with the pressurizing device, the other end of the pressure hose is fixedly connected with the threaded push rod and used for transmitting pressure and driving the threaded push rod to move up and down in the charging tube, and the rubber push head is arranged at the bottom of the threaded push rod;
the heating sealing shell assembly comprises an external sealing shell, a heat preservation layer and a heating layer, wherein the external sealing shell is arranged on the outermost layer, the heat preservation layer is arranged in the middle, and the heating layer is arranged inside the external sealing shell;
the charging assembly is positioned in the heating sealing shell assembly and comprises a fixing device, a charging pipe and a feeding spray head, the charging pipe is used for charging high-viscosity slurry, the fixing device is sleeved on the periphery of the charging pipe and fixes the charging pipe in the heating layer, and the feeding spray head is arranged at an outlet at the lower end of the charging pipe and used for spraying the slurry.
Preferably, the rubber pushing head is a wall scraping type pushing head and is provided with a rotary stirring impeller.
Preferably, the rubber pushing head is a semicircular pushing head.
Further, the fixing means are provided at the top, middle and lower portions of the charging pipe.
Furthermore, the fixing device comprises a large-caliber telescopic pipe, a small-caliber telescopic pipe is arranged in the large-caliber telescopic pipe through a connecting buckle, and the length of the small-caliber telescopic pipe in the large-caliber telescopic pipe is adjustable.
Furthermore, a damping layer is arranged on the inner wall of the fixing device, which is in contact with the charging pipe.
Furthermore, a discharge port of the charging pipe adopts a rotary sealing structure, and the feeding spray head is provided with a corresponding thread structure for loading, unloading and replacing.
Furthermore, the thread pitch of the threads on the threaded push rod can be adjusted according to different viscosities of slurry materials to be processed, and a large-pitch push rod is adopted for stirring high-viscosity slurry, so that the stirring capacity is improved; for low-viscosity slurry, a small-pitch push rod is adopted, so that the dispersion uniformity of the slurry is improved.
Further, the outer sealing case surface is coated with a thermochromic material for displaying temperature in real time.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the screw structure is adopted to realize that the slurry material is more uniformly mixed while the high-viscosity slurry is extruded, so that the overlarge difference of the components of the printing slurry caused by insufficient mixing uniformity is avoided; the temperature control structure is added into the shell, so that the real-time control of the temperature in the cavity is realized, the viscosity of the high-viscosity material is reduced by means of temperature rise, the extrusion smoothness of the high-viscosity material is further improved, and the high-precision additive manufacturing of the high-viscosity slurry material is realized; the invention realizes the direct additive manufacturing of the high-viscosity slurry material, promotes the processing application of the technology in the field of integrated circuits, and widens the application range of the technology.
Drawings
FIG. 1 is a schematic view of the entire structure of the present invention;
FIG. 2 is an overall schematic view of the extrusion system of the present invention;
FIG. 3 is a cross-sectional cut-away view of an extrusion system of the present invention;
FIG. 4 is a schematic view of the pressure transfer assembly 100 of FIG. 2 according to the present invention;
FIG. 5 is a schematic view of a different shaped pusher head of the present invention;
FIG. 6 is a schematic view of the heat sealed enclosure assembly 200 of FIG. 2 in accordance with the present invention;
FIG. 7 is a schematic cross-sectional view of the loader assembly 300 of FIG. 2 according to the present invention;
FIG. 8 is a schematic view of the clamping device 301 of FIG. 7 in accordance with the present invention;
fig. 9 is a schematic diagram of a three-dimensional mobile station of the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in fig. 1, the high-precision extrusion type high-viscosity slurry material 3D printing apparatus mainly comprises a pressurizer 1, an extrusion system 2, a three-position moving table 4 and a laser system 3.
As shown in fig. 2 and 3, there are an overall schematic and a cross-sectional view, respectively, of an extruded 3D print head for high viscosity slurry processing. The present invention includes a pressure transfer assembly 100, a heat seal housing assembly 200, and a charging assembly 300. The pressure transmitting assembly 100 is connected with a pressurizing device by a pressure hose 101, the other end of the pressure transmitting assembly is connected with a threaded push rod 102, and the threaded push rod 102 rotates downwards under the action of pressure and extrudes the slurry to promote the slurry to move downwards while stirring. In order to prevent the slurry from being difficult to stir and push due to the excessive viscosity of the slurry, the heating layer 203 in the heating and sealing shell assembly 200 starts to work, the viscosity of the slurry in the charging pipe 302 is reduced in a heating mode, the fluidity of the slurry is further improved, and the stirring and the extrusion are facilitated. In order to prevent the charging pipe 302 offset that torsion that appears in stirring and extrusion process leads to, set up three circular shape fixing device inside the cavity, if embrace tightly the hoop, fix the charging pipe, fixing device adjusts holistic elasticity through the elasticity that changes the bolt, and under the machining precision low that leads to in order to prevent to tremble simultaneously, further fix the charging pipe through shock-absorbing material such as adding thin sponge at the clamping position. In order to prevent a user from being scalded due to overhigh temperature of the heating sealing shell component, the temperature-sensitive material is coated on the outer side of the shell, and the user is prompted to indicate the general temperature of the current shell by displaying different colors, so that the warning effect is achieved.
The temperature of the heating layer 203 in the tube can be controlled, and different heating temperatures are adopted for different property materials. For the PE-Ag slurry material with high viscosity, the heating temperature needs to be controlled to be about 100 ℃ in practical processing, which is mainly caused by the property of PE. To some high viscosity composite slurry materials that need high temperature heating, thereby whether outside charging pipe satisfies the demand according to the actual required temperature needs additional consideration carries out the reasonable selection.
The pressurizer 1 provides required pressure according to the high-temperature viscosity of the slurry material and the size of the used spray head, and higher pressure is required for printing sample pieces with higher viscosity and smaller spray head size.
Referring to fig. 4 to 5, the pressure transmission assembly 100 of the present invention mainly comprises a pressure hose 101, a threaded push rod 102, and a push head 103. The pressure hose 101 mainly plays a role in pressure transmission, the threaded push rod 102 mainly plays a role in pushing the slurry material in the charging pipe to move and stir, and the push head 103 mainly plays a role in protecting the push rod and scraping off the slurry adhered to the side wall.
It should be noted that the pitch of the threaded rod can be selected according to the viscosity of the slurry material to be pushed, and generally, the thread pitch used for high viscosity slurry is larger.
It should be noted that the rubber pushing head can adopt a wall scraping type 103-1 and a common semi-circular head type 103-2, and for slurry with particularly serious wall sticking phenomenon, the wall scraping type rubber pushing head 301-1 is more suitable, and for slurry with general viscosity, the circular rubber pushing head 302 is adopted.
Referring to fig. 6, the heat sealing housing assembly 200 includes an outer sealing case 201, an insulating layer 202, and a heating layer 203. The outer sealing housing 201 serves as a seal and provides a support structure, and is internally provided with an insulating layer 202, mainly for the purpose of saving energy and controlling temperature more easily, and an innermost layer is a heating layer 203, which can provide a suitable processing temperature environment.
Wherein, the outer sealed casing 201 is coated with the thermochromic material to more intuitively display the approximate temperature of the casing, thereby preventing scald when the outer casing is disassembled due to overhigh inner temperature.
The heating layer 203 is positioned at the innermost side of the external sealing shell and is a layer of heating sheets with controllable temperature and uniform distribution, so that the overall heating uniformity in the cavity is improved.
Referring to fig. 7-8, the charging assembly 300 includes a fixture 301, a charging tube 302, and a feed spray head 303. The fixing device 301 mainly serves to prevent the charging pipe 302 from being displaced or shaken due to rotation, and therefore, the charging pipe 302 is further fixed by cushioning the charging pipe 301-4 with a material such as a thin sponge inside the fixing device 301. The charging tube 302 is used to charge the slurry, and its specific size can be adjusted according to the actual volume of the slurry material to be printed. The feeding nozzle 303 mainly adjusts the slurry inside the charging pipe 302 according to the required processing precision, and generally, a large-size nozzle is used for the slurry with high viscosity and low processing precision requirement, and a small-size nozzle is used for the slurry with low viscosity and high processing precision requirement.
According to different sizes of the required charging pipes 302, the sizes can be adjusted by screwing the bolts 301-5, and the supporting parts are adjusted by the small-caliber telescopic pipe 301-1, the large-caliber telescopic pipe 301-2 and the rotary buckle 301-3. The support point is moved down for less slurry and needs to be raised appropriately for more slurry.
Referring to fig. 9, the three-position moving platform assembly 400 includes a working table 401 and a driving assembly 402, wherein the driving assembly 402 includes an X-direction driving assembly 402-1, a Y-direction driving assembly 402-2 and a Z-direction driving assembly 402-3 for realizing three-dimensional motion control, and in order to ensure printing accuracy of the whole slurry, a two-dimensional iterative model is adopted before processing, and PLC encoding is performed on a control program in the three-position moving platform driving assembly to control the control program in consideration of the flow rate of the high-viscosity slurry and the size of an extrusion nozzle under a high-temperature condition.
Claims (9)
1. An extrusion type 3D printing nozzle for processing high-viscosity slurry is characterized by comprising a pressure transfer component, a heating sealing shell component and a charging component;
the pressure transmission assembly comprises a pressure hose, a threaded push rod and a rubber push head, one end of the pressure hose is connected with the pressurizing device, the other end of the pressure hose is fixedly connected with the threaded push rod and used for transmitting pressure and driving the threaded push rod to move up and down in the charging tube, and the rubber push head is arranged at the bottom of the threaded push rod;
the heating sealing shell assembly comprises an external sealing shell, a heat preservation layer and a heating layer, wherein the external sealing shell is arranged on the outermost layer, the heat preservation layer is arranged in the middle, and the heating layer is arranged inside the external sealing shell;
the charging assembly is positioned in the heating sealing shell assembly and comprises a fixing device, a charging pipe and a feeding spray head, wherein the charging pipe is used for charging high-viscosity slurry, the fixing device is sleeved on the periphery of the charging pipe and fixes the charging pipe in the heating layer, and the feeding spray head is arranged at an outlet at the lower end of the charging pipe and is used for spraying the slurry.
2. The extrusion-type 3D printing nozzle for high-viscosity slurry processing according to claim 1, wherein the rubber pushing head is a wall scraping type pushing head provided with a rotary stirring impeller.
3. The extrusion-type 3D print head for high viscosity slurry processing of claim 1, wherein the rubber pusher is a semi-circular pusher.
4. The extrusion-type 3D print head for high viscosity paste processing of claim 1, wherein the fixing means are provided at the top, middle and lower portions of the charging pipe.
5. The extrusion-type 3D printing nozzle for processing the high-viscosity slurry according to claim 1, wherein the fixing device comprises a large-diameter telescopic pipe, a small-diameter telescopic pipe is arranged in the large-diameter telescopic pipe through a connecting buckle, and the length of the small-diameter telescopic pipe in the large-diameter telescopic pipe is adjustable.
6. The extrusion-type 3D printing nozzle for high-viscosity slurry processing according to claim 5, wherein a shock absorption layer is arranged at the inner wall of the fixing device, which is in contact with the charging pipe.
7. The extrusion-type 3D printing nozzle for high-viscosity slurry processing according to claim 1, wherein the discharge port of the charging pipe adopts a rotary sealing structure, and the feeding nozzle is provided with a corresponding thread structure for loading and unloading replacement.
8. The extrusion-type 3D printing nozzle for processing the high-viscosity slurry as claimed in claim 1, wherein the pitch of the thread on the threaded push rod can be adjusted according to the viscosity of the slurry material to be processed.
9. The extruded 3D printing nozzle for high viscosity paste processing according to claim 1, wherein the outer sealing housing surface is coated with a thermochromic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110188833.5A CN112895427A (en) | 2021-02-19 | 2021-02-19 | Extrusion type 3D printing nozzle for processing high-viscosity slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110188833.5A CN112895427A (en) | 2021-02-19 | 2021-02-19 | Extrusion type 3D printing nozzle for processing high-viscosity slurry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112895427A true CN112895427A (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110188833.5A Pending CN112895427A (en) | 2021-02-19 | 2021-02-19 | Extrusion type 3D printing nozzle for processing high-viscosity slurry |
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| CN (1) | CN112895427A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032079A (en) * | 2015-07-12 | 2015-11-11 | 成都科盛石油科技有限公司 | Improved structure of wet type smoke dust filtration device |
| CN106903776A (en) * | 2017-02-28 | 2017-06-30 | 广东工业大学 | A kind of 3D printing shower nozzle and 3D printer suitable for concrete |
| CN108436089A (en) * | 2018-04-24 | 2018-08-24 | 汕头大学 | A kind of gradient-heated ejecting device for fusion sediment type metal 3D printing |
| CN211709580U (en) * | 2020-03-04 | 2020-10-20 | 北京美斯顿科技开发有限公司 | Building 3D prints shower nozzle and building 3D printer |
| WO2021008820A1 (en) * | 2019-07-16 | 2021-01-21 | Sandvik Machining Solutions Ab | Powder dispensing apparatus |
-
2021
- 2021-02-19 CN CN202110188833.5A patent/CN112895427A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032079A (en) * | 2015-07-12 | 2015-11-11 | 成都科盛石油科技有限公司 | Improved structure of wet type smoke dust filtration device |
| CN106903776A (en) * | 2017-02-28 | 2017-06-30 | 广东工业大学 | A kind of 3D printing shower nozzle and 3D printer suitable for concrete |
| CN108436089A (en) * | 2018-04-24 | 2018-08-24 | 汕头大学 | A kind of gradient-heated ejecting device for fusion sediment type metal 3D printing |
| WO2021008820A1 (en) * | 2019-07-16 | 2021-01-21 | Sandvik Machining Solutions Ab | Powder dispensing apparatus |
| CN211709580U (en) * | 2020-03-04 | 2020-10-20 | 北京美斯顿科技开发有限公司 | Building 3D prints shower nozzle and building 3D printer |
Non-Patent Citations (1)
| Title |
|---|
| 高宏伟: "《电子制造装备技术》", 30 September 2015, 西安电子科技大学出版社 * |
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Application publication date: 20210604 |