CN112537022B - Novel 3D prints bar extruding means - Google Patents
Novel 3D prints bar extruding means Download PDFInfo
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- CN112537022B CN112537022B CN202011289140.7A CN202011289140A CN112537022B CN 112537022 B CN112537022 B CN 112537022B CN 202011289140 A CN202011289140 A CN 202011289140A CN 112537022 B CN112537022 B CN 112537022B
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- printing
- bar
- driving gear
- pressing roller
- driven gear
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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
- B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
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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
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/314—Preparation
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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
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
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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
- B33Y10/00—Processes of additive manufacturing
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/10—Pre-treatment
-
- 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
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
Abstract
The invention discloses a novel 3D printing bar extruding mechanism which comprises a driving gear and a driven gear, wherein the driving gear and the driven gear are mutually meshed; the upper ends of the first device and the second device are provided with positioning sleeves, the lower ends of the first device and the second device are provided with heating devices, and the bottoms of the heating devices are provided with spray heads. The invention realizes size self-adaptation of the bars within a certain range, and ensures continuous transmission and extrusion of multiple sections of bars, thereby ensuring the adaptability and continuity in the actual printing process, making a foundation for automatic feeding, and improving the material application range of the fused laminated forming 3D printing technology.
Description
Technical Field
The invention relates to the technical field of 3D printing equipment, in particular to a novel 3D printing bar extruding mechanism.
Background
The traditional fused deposition modeling 3D printing technology (FDM) is a technology in which a thread-like hot melt material is heated and melted, and a three-dimensional nozzle selectively applies the material layer by layer on a work table under the control of a computer according to sectional profile information. In theory, materials that are melted by heating and solidified by cooling are suitable for this technique, but the raw material used is a filiform wire, and usually needs to be wound on a circular tray. Therefore, most of the raw materials which can be printed by the 3D printing technology at the present stage are thermoplastic polymer materials with a certain elasticity and plasticity. Other materials that do not have excellent elastoplasticity often require mixing with thermoplastics to support the printable wire, thus limiting the application of this type of technology from the standpoint of raw material morphology.
Many raw materials having practical effects in production and industrial application, such as paraffin, low-temperature alloy, composite materials added with ceramic powder or metal powder and the like, can also bring more new applications through a 3D printing process, and improve the production efficiency. However, since such materials do not have good elastoplasticity at the solid stage, it is necessary to consider the application of the materials in fused deposition modeling 3D printing technology to make cylindrical bar materials with certain bending strength. However, the existing fused deposition modeling print head is mostly used for a filament-shaped continuous wire rod with a fixed size, and a 3D print head which can adapt to the size and can realize continuous extrusion of multiple sections of bar materials is lacked.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a novel 3D printing bar extruding mechanism, which realizes size self-adaptation of bars within a certain range and ensures continuous transmission and extrusion of multiple sections of bars. Therefore, the adaptability and the continuity in the actual printing process are ensured, and a foundation is laid for automatic feeding.
In order to achieve the purpose, the invention adopts the following technical scheme:
the novel 3D printing bar extruding mechanism comprises a driving gear and a driven gear, wherein the driving gear is meshed with the driven gear, the driving gear is installed on a first device, and the driven gear is installed on a second device; the first device and the second device have the same structure and respectively comprise a synchronous belt, a top synchronous wheel and a bottom synchronous wheel; the upper ends of the first device and the second device are provided with positioning sleeves, the lower ends of the first device and the second device are provided with heating devices, and the bottoms of the heating devices are provided with spray heads.
Further, the first device includes sponge friction area, sponge friction area inlayer is provided with the hold-in range, the hold-in range is installed on top synchronizing wheel and bottom synchronizing wheel be provided with top pre-compaction gyro wheel and bottom pre-compaction gyro wheel between top synchronizing wheel and the bottom synchronizing wheel.
Further, the driving gear and the bottom synchronizing wheel of the first device are fixed on the same shaft, and the driven gear and the bottom synchronizing wheel of the second device are fixed on the same shaft.
Further, heating device includes thermal-insulated sleeve, thermal-insulated sleeve installs inside heating sleeve, heating sleeve outside is provided with shower nozzle, temperature sensor, heating rod and fin.
Further, the diameter of the solid bar is 5 mm-100 mm.
A method of 3D printing, comprising the steps of:
s01: the upper end of the solid bar stock is placed in the positioning sleeve;
s02: the motor drives the driving gear to rotate, and a bottom synchronous wheel in the first device and the driving gear rotate simultaneously to drive a synchronous belt in the first device and the top synchronous wheel to rotate; the driving gear drives the driven gear to rotate, a bottom synchronous wheel and the driven gear in the second device rotate simultaneously, a synchronous belt and a top synchronous wheel in the second device are driven to rotate, and the solid bar materials move downwards;
s03: and the solid bar stock moved into the heat insulation sleeve in the heating device is heated into a molten bar stock, and is discharged from the spray head for 3D printing.
Furthermore, an elastic device I is connected with a groove of the top pre-pressing roller in the first device and the second device, an elastic device II is connected with a groove of the bottom pre-pressing roller in the first device and the second device, the groove is located at the rear ends of the top pre-pressing roller and the bottom pre-pressing roller, the elastic device I applies horizontal tension to the top pre-pressing roller towards the solid bar, the elastic device II applies horizontal tension to the bottom pre-pressing roller towards the solid bar, and finally the solid bar is in friction contact with the sponge friction belt on the outer layer of the synchronous belt.
Furthermore, the elastic device I and the elastic device II are consistent in structure and both consist of tension springs or rubber bands.
Further, the positioning sleeve, the heat insulation sleeve, the driving gear and the driven gear can be detached and replaced.
Further, the distance between the first device and the second device is set according to the diameter size of the solid bar stock.
The invention has the beneficial effects that:
1. the traditional printable bar stock is a filamentous polymer material with the thickness of less than 3mm, needs excellent elasticity and plasticity, and limits the range of usable materials of the bar stock. According to the scheme, the bar stock with the diameter of more than 5mm is adopted, theoretically, most of the cooled and solidified materials in industrial application can keep the rigidity of the bar stock under the size in the range, and the elastoplasticity requirement on the materials is reduced.
2. Because the bar stock only has requirements on rigidity, and the rigidity can be improved through the diameter, theoretically, the scheme can process pure paraffin, low-temperature metal, composite materials added with a large amount of ceramic powder, metal powder, carbon fiber and the like, even slurry and other liquid which can be solidified at low temperature and can not be used in the traditional melting and laminating molding.
3. According to the extrusion device of the traditional fused laminated forming 3D printing technology, a friction wheel or a synchronous wheel is adopted to apply downward pressure to a certain point at the upper part of a wire melting area, continuous connection is difficult to achieve after wire breakage, and manual material changing is needed. This scheme adopts 40mm ~100mm long distance sponge friction area to make continuous frictional force, has guaranteed the motion stability after next section bar gets into the friction area to keep in succession with last section material, and the magnitude of frictional force can be according to the compression capacity decision in pressure adjustment sponge friction area of pre-compaction gyro wheel.
4. By changing the sizes of the positioning sleeve and the heat insulation sleeve and adjusting the distance between the synchronous belts, the same set of extrusion mechanism can adapt to bars within a certain size range and has stronger adaptability.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
fig. 2 is a rear view of a three-dimensional structure according to an embodiment of the present invention.
Reference numerals:
1-solid bar stock; 2-positioning the sleeve; 3-sponge friction belt; 4-synchronous belt; 5-a driven gear; 6-heating the sleeve; 7-a heat-insulating sleeve; 8-molten state bar stock; 9-a spray head; 10-a temperature sensor; 11-a heating rod; 12-a heat sink; 13-a drive gear; 14-top pre-pressing roller; 15-top synchronizing wheel; 16-bottom synchronizing wheel; 17-bottom prepressing roller.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific examples described herein are intended to be illustrative only and are not intended to be limiting.
Referring to fig. 1 to fig. 2, a novel 3D printing bar extruding mechanism provided by the present invention will now be described. A novel 3D printing bar extruding mechanism comprises a driving gear 13 and a driven gear 5, wherein the driving gear 13 is meshed with the driven gear 5, the driving gear 13 is installed on a first device, and the driven gear 5 is installed on a second device; the driving gear 13 and the bottom synchronizing wheel 16 of the first device are fixed on the same shaft, and the driven gear 5 and the bottom synchronizing wheel of the second device are fixed on the same shaft.
The first device is unanimous with the second device structure, all includes sponge friction area 3, and 3 inlayers in sponge friction area are provided with hold-in range 4, and hold-in range 4 is installed on top synchronizing wheel 15 and bottom synchronizing wheel 16, is provided with top pre-compaction gyro wheel 14 and bottom pre-compaction gyro wheel 17 between top synchronizing wheel 15 and bottom synchronizing wheel 16.
The upper ends of the first device and the second device are provided with a positioning sleeve 2 for fixing a solid bar material 1, the lower ends of the first device and the second device are provided with a heating device, the heating device comprises a heat insulation sleeve 7, the heat insulation sleeve 7 is installed inside the heating sleeve 6, a temperature sensor 10, a heating rod 11 and cooling fins 12 are arranged outside the heating sleeve 6, and a spray head 9 is arranged at the bottom of the heating device.
The invention provides a 3D printing method, which comprises the following specific steps:
s01: the upper end of the solid bar is placed in the positioning sleeve;
s02: the motor drives the driving gear to rotate, the bottom synchronous wheel 16 and the driving gear 13 in the first device rotate simultaneously, and the synchronous belt 4 and the top synchronous wheel in the first device are driven to rotate 15; the driving gear 13 drives the driven gear 5 to rotate, the bottom synchronous wheel and the driven gear 5 in the second device rotate simultaneously to drive the synchronous belt and the top synchronous wheel in the second device to rotate, and finally the synchronous belts 4 of the two devices transmit power downwards simultaneously, so that the solid bar 1 moves downwards;
s03: the solid bar stock 1 moved into the heat insulating sleeve in the heating device is heated to a molten bar stock 8, and is discharged from the nozzle 9 for 3D printing.
This scheme adopts elastic device I to connect the slot of top pre-compaction gyro wheel 14 in first device and the second device, adopt elastic device II to connect the slot of bottom pre-compaction gyro wheel 17 in first device and the second device, the slot is located the rear end of top pre-compaction gyro wheel 14 and bottom pre-compaction gyro wheel 17, the horizontal pulling force towards 1 direction of solid-state bar is applyed to elastic device I to top pre-compaction gyro wheel 14, the horizontal pulling force towards 1 direction of solid-state bar is applyed to elastic device II to bottom pre-compaction gyro wheel, finally make 3 frictional contact in solid-state bar 1 and the outer sponge friction band of hold-in range, produce higher frictional force. When the novel 3D printing bar extruding mechanism performs 3D printing work, the solid bar 1 is driven to move downwards by friction force; when the solid bar 1 needs to be taken out, the solid bar 1 is driven by the friction force to move upwards. The continuous friction force is manufactured by the long-distance sponge friction belt 3 of 40 mm-100 mm, the motion stability of the next section of solid bar 1 after entering a friction area is guaranteed, the continuous friction force is kept with the previous section of material, and the magnitude of the friction force can be determined by adjusting the compression amount of the sponge friction belt 3 according to the pressure of the elastic device I and the elastic device II on the top prepressing roller 14 and the bottom prepressing roller 17.
The positioning of the movement of the solid bar 1 is determined by the positioning sleeve 2, the heat-insulating sleeve 7 and the same-diameter guide not shown in the figures. The solid bar stock 1 is kept at a lower temperature under the action of the heat insulating sleeve 7 and the radiating fins 12, so that the solid state is maintained, the bottom of the solid bar stock is heated up under the action of the heating rod 11 due to the heating sleeve 6, a molten bar stock 8 area is manufactured, and the molten bar stock 8 is extruded from a nozzle at the bottom through the friction force on the sponge friction belt 3.
The novel 3D printing bar extruding mechanism provided by the invention can be used for printing solid bars with the diameter of 5 mm-100 mm. The positioning sleeve 2, the heat insulation sleeve 7, the driving gear 13 and the driven gear 5 can be detached and replaced.
The method for replacing solid bars with different sizes to perform 3D printing comprises the following steps: according to the diameter size of the solid bar stock 1 to be printed, the positioning sleeves 2 and 7 are replaced, the distance between the first device and the second device is adjusted through a moving method, the distance between the two synchronous belts 4 is changed, the driving gear 13 and the driven gear are replaced to 5, the gears are in a re-meshing state, and then the solid bar stocks 1 with different sizes can be placed. Therefore, the same set of extrusion mechanism can adapt to bars within a certain size range, and has stronger adaptability.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (7)
1. A method for 3D printing by adopting a 3D printing bar extruding mechanism is characterized in that the 3D printing bar extruding mechanism comprises a driving gear (13) and a driven gear (5), the driving gear (13) is meshed with the driven gear (5), the driving gear (13) is installed on a first device, and the driven gear (5) is installed on a second device; the first device and the second device are consistent in structure and respectively comprise a synchronous belt (4), a top synchronous wheel (15) and a bottom synchronous wheel (16); the upper ends of the first device and the second device are provided with positioning sleeves (2), the lower ends of the first device and the second device are provided with heating devices, and the bottoms of the heating devices are provided with spray heads (9); the first device comprises a sponge friction belt (3), the synchronous belt (4) is arranged on the inner layer of the sponge friction belt (3), the synchronous belt (4) is installed on the top synchronous wheel (15) and the bottom synchronous wheel (16), and a top pre-pressing roller (14) and a bottom pre-pressing roller (17) are arranged between the top synchronous wheel (15) and the bottom synchronous wheel (16);
the method for performing 3D printing by adopting the 3D printing bar extruding mechanism comprises the following steps:
s01: the upper end of the solid bar (1) is placed in the positioning sleeve (2);
s02: the motor drives the driving gear (13) to rotate, the bottom synchronous wheel (16) and the driving gear (13) in the first device rotate simultaneously, and the synchronous belt (4) and the top synchronous wheel (15) in the first device are driven to rotate; the driving gear (13) drives the driven gear (5) to rotate, a bottom synchronous wheel and the driven gear (5) in the second device rotate simultaneously to drive a synchronous belt and a top synchronous wheel in the second device to rotate, and the solid bar (1) moves downwards;
s03: the solid bar stock (1) moving into the heat insulation sleeve of the heating device is heated into a molten bar stock (8), and is discharged from the spray head (9) for 3D printing;
connecting a groove of the top pre-pressing roller (14) in the first device and a groove of the top pre-pressing roller in the second device by using an elastic device I, connecting a groove of the bottom pre-pressing roller (17) in the first device and the second device by using an elastic device II, wherein the groove is positioned at the rear ends of the top pre-pressing roller (14) and the bottom pre-pressing roller (17), the elastic device I applies horizontal tension to the top pre-pressing roller (14) towards the solid bar (1), and the elastic device II applies horizontal tension to the bottom pre-pressing roller towards the solid bar (1) so as to finally enable the solid bar (1) to be in frictional contact with a sponge friction belt (3) on the outer layer of the synchronous belt;
adopt 40mm ~100mm long distance sponge friction area to make continuous frictional force, the magnitude of frictional force can be according to the compressive capacity decision in the pressure adjustment sponge friction area of pre-compaction gyro wheel.
2. A method for 3D printing with a 3D printing bar extrusion mechanism according to claim 1, characterized in that the driving gear (13) and the bottom synchronizing wheel (16) of the first device are fixed on the same shaft, and the driven gear (5) and the bottom synchronizing wheel of the second device are fixed on the same shaft.
3. A method for 3D printing with a 3D printing bar extrusion mechanism according to claim 1, characterized in that the heating device comprises a heat insulating sleeve (7), the heat insulating sleeve (7) is mounted inside a heating sleeve (6), and outside the heating sleeve there are a temperature sensor (10), a heating rod (11) and cooling fins (12).
4. A method of 3D printing with a 3D printing bar extrusion mechanism according to claim 1, characterized in that the solid bar (1) has a diameter size of 5mm to 100 mm.
5. The method for 3D printing by using a 3D printing bar extruding mechanism as claimed in claim 1, wherein the elastic device I and the elastic device II are consistent in structure and are both composed of tension springs or rubber bands.
6. A method for 3D printing with a 3D printing bar extrusion mechanism according to claim 1, characterized in that the positioning sleeve (2), the heat insulating sleeve (7), the driving gear (13) and the driven gear (5) are all removable and replaceable.
7. A method of 3D printing using a 3D printing bar extrusion mechanism according to claim 1 wherein the spacing of the first and second means is set according to the diameter dimension of the solid bar (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011289140.7A CN112537022B (en) | 2020-11-17 | 2020-11-17 | Novel 3D prints bar extruding means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011289140.7A CN112537022B (en) | 2020-11-17 | 2020-11-17 | Novel 3D prints bar extruding means |
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| Publication Number | Publication Date |
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| CN112537022A CN112537022A (en) | 2021-03-23 |
| CN112537022B true CN112537022B (en) | 2022-06-21 |
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| CN202011289140.7A Active CN112537022B (en) | 2020-11-17 | 2020-11-17 | Novel 3D prints bar extruding means |
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| CN113732314B (en) * | 2021-09-29 | 2023-11-17 | 青岛大学 | Metal material processing system |
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| JP2004277172A (en) * | 2003-02-25 | 2004-10-07 | Toshiba Corp | Paper sheet transporting mechanism, paper sheet direction converting mechanism, and paper sheet stamping mechanism |
| CN201333797Y (en) * | 2008-12-29 | 2009-10-28 | 华南理工大学 | Micro plunger-type extrusion system used for melt accumulation quick forming |
| CN103891563A (en) * | 2014-04-25 | 2014-07-02 | 李全堂 | Film pressing adjusting and limiting device for film laminating machine |
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