CN113478825A - Compound formula 3D printer of extruding - Google Patents
Compound formula 3D printer of extruding Download PDFInfo
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- CN113478825A CN113478825A CN202110821229.1A CN202110821229A CN113478825A CN 113478825 A CN113478825 A CN 113478825A CN 202110821229 A CN202110821229 A CN 202110821229A CN 113478825 A CN113478825 A CN 113478825A
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 187
- 238000007639 printing Methods 0.000 claims abstract description 133
- 238000002156 mixing Methods 0.000 claims abstract description 42
- 230000001502 supplementing effect Effects 0.000 claims abstract description 38
- 238000001125 extrusion Methods 0.000 claims abstract description 30
- 239000006052 feed supplement Substances 0.000 claims description 55
- 238000007599 discharging Methods 0.000 claims description 25
- 239000000203 mixture Substances 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012840 feeding operation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Classifications
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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
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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
- 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
- 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
Abstract
The application relates to a formula 3D printer is extruded to complex belongs to printer technical field. This formula 3D printer is extruded in complex includes: the temporary printing ink box is used for accommodating the mixed first material and second material or mixing the first material and the second material in the temporary printing ink box; the discharge driving system is an air pressure driving system and is used for extruding the mixed first material and the second material in the temporary printing ink box out of the temporary printing ink box; the first material supplementing system is a motor driving system and is used for supplementing the first material into the printing temporary storage ink box; the second material supplementing system is a motor driving system and is used for supplementing the second material into the printing temporary storage ink box; the printing nozzle is connected to the discharge end of the printing temporary storage ink box; and the control system is respectively used for controlling the discharge driving system, the first feeding system and the second feeding system. The compound extrusion type 3D printer can realize timely and accurate mixing of materials and timely and accurate printing of the materials.
Description
Technical Field
The application relates to the technical field of printers, particularly, relates to a formula 3D printer is extruded to complex.
Background
The research-type and gel-type biological 3D printing materials are limited by synthesis difficulty, generally test printing is carried out on materials with the volume of less than 10ml, and when continuous feeding printing is carried out while two-material mixing reaction is carried out, the purpose cannot be achieved by using a conventional stirring mode.
Disclosure of Invention
The application aims to provide a composite extrusion type 3D printer, a discharge driving system based on air pressure driving is used as printing power, model printing is facilitated, and the mixing volume proportion of different materials can be accurately controlled based on a first material supplementing system and a second material supplementing system which are driven by a motor; the discharging driving system, the first feeding system and the second feeding system are respectively controlled through the control system, timely and accurate mixing of materials can be achieved, timely and accurate printing of the materials can be achieved, operation steps and materials for experiments can be saved, an experiment container does not need to be additionally transferred, how many printing materials are needed, and materials with corresponding volumes can be mixed.
The application is realized by the following technical scheme:
the embodiment of the application provides a formula 3D printer is extruded to complex for bimaterial is printed, and bimaterial includes first material and second material, and this formula 3D printer is extruded to complex includes:
the temporary printing ink box is used for accommodating the mixed first material and second material or mixing the first material and the second material in the temporary printing ink box;
the discharge driving system is an air pressure driving system and is used for extruding the mixed first material and the second material in the temporary printing ink box out of the temporary printing ink box;
the first material supplementing system is a motor driving system and is used for supplementing the first material into the printing temporary storage ink box;
the second material supplementing system is a motor driving system and is used for supplementing the second material into the printing temporary storage ink box;
the printing nozzle is connected to the discharge end of the printing temporary storage ink box;
and the control system is respectively used for controlling the discharge driving system, the first feeding system and the second feeding system.
According to some embodiments of the application, ejection of compact actuating system includes piston, lid and atmospheric pressure source, prints the ink horn of keeping in including the chamber that holds that has first opening and second opening, and the piston movably sets up in holding the intracavity, and the piston is sealed with the inner wall that holds the chamber and is cooperated, and the lid is configured as the lid and locates first opening and with print the sealed cooperation of ink horn of keeping in, and the atmospheric pressure source is connected in the lid and is communicated with first opening, and the second opening is for printing the discharge opening of keeping in the ink horn.
According to some embodiments of the application, every feed supplement system all includes driving motor, the lead screw, the motor fixing plate, the guide rail, the slider, feed bin piston and feed supplement storehouse, driving motor installs in the motor fixing plate, lead screw connection is in driving motor's output, the guide rail sets up in the motor fixing plate, guide rail and lead screw parallel arrangement, slider and guide rail cooperation, the lead screw is located to the slider cover and with lead screw thread fit, the one end of feed bin piston is connected in the slider, the other end slidable of feed bin piston sets up in the feed supplement storehouse, the discharge end and the second opening intercommunication of feed supplement storehouse. Through the matching mode of the driving motor and the lead screw, the quantitative pushing of the bin piston can be realized, and the mixing volume proportion of different materials can be accurately controlled.
According to some embodiments of the present application, the compound extrusion 3D printer further comprises:
the feed supplement pipeline, the one end and the second opening of feed supplement pipeline are connected, and first feed supplement system and second feed supplement system are connected respectively to the other end of feed supplement pipeline to in the second opening to the ink horn additional material of keeping in printing, save the transfer experiment container, reduce the cost.
According to some embodiments of the present application, the compound extrusion 3D printer further comprises:
and the discharge tee joint is respectively connected with the second opening, the feed supplement pipeline and the printing nozzle. Through the water conservancy diversion effect of ejection of compact tee bend for print the ink horn of keeping in respectively with feed supplement system and print the intercommunication between the nozzle, the multidirectional flow of the material of being convenient for satisfies feed supplement, the demand of printing, can enough realize timely, the accurate mixture of material, can realize timely, the accurate printing of material again. A material supplementing valve is arranged between the discharging tee joint and the material supplementing pipeline, a discharge valve is arranged between the discharging tee joint and the printing nozzle, the material supplementing valve and the discharge valve are both electrically connected with the control system, and the material supplementing valve and the discharge valve are alternatively opened.
According to some embodiments of the application, the feed supplement pipeline includes the feed supplement tee bend, hybrid tube and feed supplement connecting pipe, the feed supplement tee bend is connected the one end of first feed supplement system, second feed supplement system and hybrid tube respectively, the one end of feed supplement connecting pipe is connected to the other end of hybrid tube, the second opening is connected to the other end of feed supplement connecting pipe, the hybrid tube is used for the mixture of first material and second material, carry to holding intracavity storage via the second opening, be convenient for realize in time, the accurate mixture of material.
According to some embodiments of the application, the feed supplement pipeline includes feed supplement three-way valve and feed supplement connecting pipe, the first feed supplement system is connected respectively to the feed supplement three-way valve, the one end of second feed supplement system and feed supplement connecting pipe, the second opening is connected to the other end of feed supplement connecting pipe, the feed supplement three-way valve is used for the intercommunication of first feed supplement system and feed supplement connecting pipe or the intercommunication of second feed supplement system and feed supplement connecting pipe, realize the transport of single material, mutual noninterference when different feed supplement systems start, ensure that suitable material flows to and prints the ink horn of keeping in.
According to some embodiments of the present application, the compound extrusion 3D printer further comprises:
printing needle head, printing needle head installs in printing nozzle's discharge end, printing needle head is used for printing tubulose silk material, including outer needle tubing and inlayer needle tubing, inlayer needle tubing includes first connecting portion and second connecting portion, first connecting portion are one end open-ended tubular structure, the open end of first connecting portion is used for connecting printing nozzle, the second connecting portion are connected in the blind end of first connecting portion, the outside of second connecting portion and the one end of outer needle tubing are located to outer needle tubing cover are connected with first connecting portion, form discharging channel between outer needle tubing and the second connecting portion, a plurality of through-holes with discharging channel intercommunication are seted up to the blind end.
In the above scheme, the discharge passage is formed by the cooperation of the second connecting parts of the outer-layer needle tube and the inner-layer needle tube, so that the material forms tubular wires in the discharge passage, and the printing quality is ensured.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a compound extrusion type 3D printer according to an embodiment of the present disclosure;
fig. 2 is a cross-sectional view of a printing tip of a compound extrusion 3D printer provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a compound extrusion type 3D printer according to another embodiment of the present application.
Icon: 100-compound extrusion 3D printer; 10-printing a temporary storage ink box; 11-a first opening; 12-a second opening; 13-a containment chamber; 20-a discharge drive system; 21-a piston; 22-a cover body; 23-a source of air pressure; 301-a first feed system; 302-a second feed system; 31-a drive motor; 32-a lead screw; 33-motor fixing plate; 34-a guide rail; 35-a slide block; 36-a bin piston; 37-a feed supplement bin; 38-bin fixing plate; 40-a print nozzle; 50-a control system; 60-a feed line; 61-three-way feed supplement; 62-a mixing tube; 621-spiral guide plate; 63-supplementary material connecting pipe; 64-feed three-way valve; 71-discharge tee joint; 72-a make-up valve; 73-a discharge valve; 80-printing needle head; 81-outer layer needle tube; 82-inner layer needle tube; 821-a first connection; 822-a second connecting part; 823-through hole; 83-discharge channel.
Detailed Description
Embodiments of the present application will be described in further detail below with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the described embodiments.
A compound extrusion type 3D printer according to an embodiment of an aspect of the present application is described below with reference to the drawings.
As shown in fig. 1 to 3, a co-extrusion type 3D printer 100 according to an embodiment of the present application is used for bi-material printing, the bi-material including a first material and a second material, the co-extrusion type 3D printer 100 including: the printing temporary ink box 10, the discharging driving system 20, the first feeding system 301, the second feeding system 302, the printing nozzle 40 and the control system 50.
Specifically, the printing temporary storage ink box 10 is used for accommodating the mixed first material and second material, or the first material and the second material are mixed in the printing temporary storage ink box 10, and the printing temporary storage ink box 10 can store the materials so as to meet the printing requirement. The discharge drive system 20 is a pneumatic drive system, and is configured to extrude the mixed first material and second material in the printing buffer ink cartridge 10 from the printing buffer ink cartridge 10. The first replenishment system 301 is a motor-driven system for replenishing the first material into the printing buffer cartridge 10. The second replenishment system 302 is a motor driven system for replenishing the second material into the print buffer cartridge 10. The printing nozzle 40 is connected to the discharge end of the printing buffer cartridge 10 to enable printing of the mixed material. The control system 50 is used for controlling the discharge driving system 20, the first feeding system 301 and the second feeding system 302 respectively.
According to the composite extrusion type 3D printer 100, the discharge driving system 20 based on air pressure driving is used as printing power, model printing is facilitated, and the mixing volume proportion of different materials can be accurately controlled based on the first material supplementing system 301 and the second material supplementing system 302 driven by the motors; through control system 50 control ejection of compact actuating system 20, first feed supplement system 301 and second feed supplement system 302 respectively, can enough realize timely, the accurate mixing of material, can realize timely, the accurate printing of material again to can save operating procedure and material for experiments, need not extra transfer experiment container, how many printing materials of possible needs just can mix the material of corresponding volume.
According to some embodiments of the present application, as shown in FIG. 1, the outfeed drive system 20 includes a piston 21, a cover 22, and a pneumatic pressure source 23. The print temporary ink cartridge 10 comprises a first opening 11, a second opening 12 and a containing cavity 13, wherein the sectional area of the first opening 11 is larger than that of the second opening 12, and a piston 21 can enter the containing cavity 13 through the first opening 11 to realize the assembly of the piston 21. Piston 21 movably sets up in holding chamber 13, and piston 21 and the sealed cooperation of the inner wall that holds chamber 13 when piston 21 removes in holding chamber 13, the position change of piston 21 realizes printing material and keeps in or extrude. The cover 22 is configured to cover the first opening 11 and is in sealing engagement with the printing buffer cartridge 10 to ensure that the printing buffer cartridge 10 is a sealed chamber. The air pressure source 23 is connected to the cover 22, and when compressed air is introduced into the printing buffer cartridge 10, the piston 21 is moved toward the second opening 12 by the compressed air. The second opening 12 is a feeding and discharging opening of the printing temporary storage ink box 10, that is, during printing operation, the second opening 12 is a discharging opening of the printing temporary storage ink box 10, during feeding operation, the second opening 12 is a feeding opening of the printing temporary storage ink box 10, and materials flow through the second opening 12 regardless of being extruded from the accommodating cavity 13 or entering the accommodating cavity 13. According to some embodiments of the present application, as shown in fig. 1, each feeding system (a general name of the first feeding system 301 and the second feeding system 302) includes a driving motor 31, a lead screw 32, a motor fixing plate 33, a guide rail 34, a slider 35, a bin piston 36, and a feeding bin 37. The motor fixing plate 33 is attached to a base (a support surface such as a laboratory table, a work table, or the ground), and the driving motor 31 is attached to the motor fixing plate 33. The lead screw 32 is connected to the output end of the driving motor 31, the guide rail 34 is arranged on the motor fixing plate 33, and the guide rail 34 is arranged in parallel with the lead screw 32; the slide block 35 is matched with the guide rail 34, and the slide block 35 is sleeved on the lead screw 32 and is in threaded fit with the lead screw 32. The feeding bin 37 is mounted on the motor fixing plate 33 through a bin fixing plate 38 to fix the feeding bin 37, and meanwhile, the extending direction of the feeding bin 37 is consistent with the extending direction of the guide rail 34. One end of the bin piston 36 is connected to the sliding block 35, the other end of the bin piston 36 is slidably disposed in the replenishing bin 37, and the discharge end of the replenishing bin 37 is used for communicating with the second opening 12. When the driving motor 31 works, the driving motor 31 drives the screw rod 32 to rotate, and the sliding block 35 moves along the guide rail 34 under the rotation driving of the screw rod 32, so that the bin piston 36 is driven to move in the material supplementing bin 37, and then the discharging or feeding of the material supplementing bin 37 is realized. Through the matching mode of the driving motor 31 and the lead screw 32, the quantitative movement of the bin piston 36 can be pushed, and the mixing volume proportion of different materials can be accurately controlled.
It should be noted that the driving motor 31 is electrically connected to the control system 50 to receive a control command from the control system 50 for operation. The electrical connection between the driving motor 31 and the control system 50 may be through a cable. In other embodiments of the present application, the driving motor 31 and the control system 50 may also be connected wirelessly, for example, via bluetooth, WiFi, etc.
According to some embodiments of the present application, as shown in fig. 1, the compound extrusion 3D printer 100 further includes a feed line 60. The first feeding system 301 and the second feeding system 302 are connected with the second opening 12 through the feeding pipeline 60, so that materials can be fed to the temporary printing ink storage box 10 through the second opening 12, the transfer experiment container is saved, and the cost is reduced. The compound extrusion type 3D printer 100 further includes a discharge tee 71. The discharge tee 71 is connected to the second opening 12, the feeding pipe 60 and the printing nozzle 40 respectively. Through the water conservancy diversion effect of ejection of compact tee bend 71 for print the ink horn 10 of keeping in and the feed supplement system and print the intercommunication between the nozzle 40 respectively, the multidirectional flow of the material of being convenient for satisfies the feed supplement, the demand of printing, can enough realize timely, the accurate mixture of material, can realize timely, the accurate printing of material again.
A material supplementing valve 72 is arranged between the discharging tee joint 71 and the material supplementing pipeline 60, a material discharging valve 73 is arranged between the discharging tee joint 71 and the printing nozzle 40, the material supplementing valve 72 and the material discharging valve 73 are both electrically connected with the control system 50, and one of the material supplementing valve 72 and the material discharging valve 73 is opened. The feeding valve 72 and the discharging valve 73 are alternatively opened, so that the printing operation or the feeding operation can be conveniently switched, the operation steps and experimental materials are saved, and the working efficiency is improved.
During the replenishment, the first and second materials can be mixed into the printing buffer cartridge 10, for example: the feeding pipeline 60 comprises a feeding tee 61, a mixing pipe 62 and a feeding connecting pipe 63. The feeding tee 61 is respectively connected with one end of the first feeding system 301, the second feeding system 302 and one end of the mixing pipe 62, the other end of the mixing pipe 62 is connected with one end of the feeding connecting pipe 63, the other end of the feeding connecting pipe 63 is connected with the second opening 12, and the mixing pipe 62 is used for mixing the first material and the second material. That is, the discharge end of the feeding bin 37 of each feeding system is communicated with the second opening 12 of the printing temporary ink storage cartridge 10 through the feeding tee 61, the mixing pipe 62 and the feeding connecting pipe 63. Through the cooperation of feed supplement tee bend 61 and mixing tube 62, carry the first material and the second material to holding the chamber 13 storage via second opening 12 after mixing in mixing tube 62, be convenient for realize in time, the accurate mixture of material.
As shown in fig. 1, a spiral baffle 621 is disposed in the mixing tube 62, and the spiral baffle 621 is disposed in the mixing tube 62 in a spiral shape to increase the flow path of the first material and the second material in the mixing tube 62, so as to facilitate the uniform mixing of the first material and the second material. The supplementary material connecting pipe 63 is connected with the second opening 12 through a discharge tee 71, and the supplementary material valve 72 is arranged on the supplementary material connecting pipe 63, so that the first material and the second material are uniformly mixed and then enter the temporary printing ink box 10.
According to some embodiments of the present application, the compound extrusion 3D printer 100 further comprises a printing needle 80. The printing needle 80 is mounted at the discharge end of the printing nozzle 40, and the printing needle 80 is used for printing tubular filament materials. Tubular silk materials are printed through the printing needle head 80, and the printing requirements of users are met.
It is noted that the tubular filament is one state of material being extruded through the printing needle 80.
According to some embodiments of the present application, as shown in fig. 1 and fig. 2, the printing needle 80 includes an outer needle tube 81 and an inner needle tube 82, the inner needle tube 82 includes a first connection portion 821 and a second connection portion 822, the first connection portion 821 is a tubular structure with an open end, the open end of the first connection portion 821 is used for connecting the printing nozzle 40, the second connection portion 822 is connected to a closed end of the first connection portion 821, the outer needle tube 81 is sleeved outside the second connection portion 822, one end of the outer needle tube 81 is connected to the first connection portion 821, a discharge channel 83 is formed between the outer needle tube 81 and the second connection portion 822, and the closed end is provided with a plurality of through holes 823 communicating with the discharge channel 83. The outer-layer needle tube 81 and the second connecting part 822 of the inner-layer needle tube 82 are matched to form the discharge channel 83, so that the material forms a tubular wire in the discharge channel 83, and the printing quality is ensured.
It should be noted that the second connecting portion 822 is a rod-shaped structure, the second connecting portion 822 is coaxially disposed with the first connecting portion 821, and the second connecting portion 822 is coaxially disposed with the outer needle tube 81, so as to print tubular filament materials and ensure printing quality.
It should be noted that the shape of the through hole 823 may be any shape, for example, a circular hole, a square hole triangle hole, etc., and the present application is not limited thereto.
In this application, printing syringe needle 80 is the tubulose and extrudes the formula syringe needle, and it is coaxial printing syringe needle 80, and the feed inlet and the discharge gate of syringe needle are same axis, simple structure.
The composite extrusion type 3D printer 100 provided by the application is based on an application scene that the consumption of a printing material is less than 10ml, the volume in the mixing pipe 62 is less than 1ml, the extrusion volumes of the first material supplementing system 301 and the second material supplementing system 302 are controlled, and continuous feeding and printing can be performed while mixing reaction of two materials in different proportions is performed as required by the three-way valve and the mixing pipe 62.
The working principle of the compound extrusion type 3D printer 100 according to the embodiment of the present application is:
the first material to be printed and the second material to be printed are installed in the first feeding system 301 and the second feeding system 302, which are the materials to be printed in the feeding bin 37.
The mixing ratio of the two materials is set in the control system 50, the first feeding system 301 and the second feeding system 302 filled with the materials are connected to the feeding tee 61, and the materials are led to the feeding tee 61 on a test-by-test basis.
The feeding valve 72 is opened, the discharging valve 73 is closed, and the control system 50 sends out instructions to control the first feeding system 301 and the second feeding system 302 to extrude the corresponding materials in proportion at the same time. The first material and the second material pass through the mixing pipe 62 and the discharge tee 71 and then reach the printing temporary storage ink box 10.
When printing is started, the control system 50 closes the material replenishing valve 72 and opens the material discharging valve 73, and the control system 50 controls the air pressure source 23 to release compressed air to drive the piston 21 to extrude and print the material in the temporary printing ink storage box 10.
It is to be noted that, in practice, the material mixing ratio at the initial stage may not reach the set value or bubbles may be present. In the printing temporary ink storage box 10, the materials follow the principle of 'first-in last-out and last-in first-out', and the materials with better mixing quality are bound to be printed.
Specifically, since the printing temporary ink cartridge 10 has only one material inlet and outlet, i.e. the second opening 12, when the material is replenished, the material enters the accommodating chamber 13 from the second opening 12, the piston 21 is pushed to move toward the first opening 11, the material which enters the printing temporary ink cartridge 10 first approaches the piston 21, and the material which enters the printing temporary ink cartridge 10 later approaches the second opening 12. When the material mixed by the mixing pipe 62 in the first section of the material possibly has a time difference that the material reaches the inlet of the mixing pipe 62 successively, so that the material mixing proportion error is caused, the part of the material enters the printing temporary ink box 10 and is close to the piston 21, after the material mixed by the right proportion of the subsequent batch is continuously supplemented into the printing temporary ink box 10, the printing is started, and the material closer to the second opening 12 is firstly discharged for printing, so that the printing quality is ensured.
According to further embodiments of the application, the first material and the second material can be fed separately into the printing buffer cartridge 10 during the replenishment and then mixed in the printing buffer cartridge 10. For example, as shown in FIG. 3, the feed line 60 comprises a feed three-way valve 64 and a feed connecting pipe 63, the feed three-way valve 64 is connected to one end of the first feed system 301, the second feed system 302 and one end of the feed connecting pipe 63, the other end of the feed connecting pipe 63 is connected to the second opening 12, and the feed three-way valve 64 is used for communicating the first feed system 301 with the feed connecting pipe 63 or communicating the second feed system 302 with the feed connecting pipe 63. That is, the discharge end of the feeding bin 37 of each feeding system is communicated with the second opening 12 of the printing temporary ink storage box 10 through the feeding three-way valve 64 and the feeding connecting pipe 63. The feeding three-way valve 64 is used for realizing the conveying of single materials, and different feeding systems are not interfered with each other when being started, so that the proper materials can flow to the temporary printing ink storage box 10.
It is noted that the feed three-way valve 64 is electrically connected to the control system 50, and the control system 50 is used for controlling the operation of the feed three-way valve 64 to realize the feeding of different materials.
The working principle of the above-described embodiment in which the first material and the second material are fed into the printing buffer cartridge 10 separately is:
in the working mode 1, the material is supplemented into the printing temporary ink storage box 10, and when the printing is not in a filament discharging state and in a printing gap, the control system 50 can rapidly switch the conduction direction of the material supplementing three-way valve 64, open the material supplementing valve 72 and close the material discharging valve 73, so that the first material supplementing system 301 or the second material supplementing system 302 can supplement the material into the printing temporary ink storage box 10.
The working mode 2, printing mode, the control system 50 controls the material replenishing valve 72 to close, opens the material discharging valve 73, the printing temporary ink storage box 10 is communicated with the printing needle 80, and opens the air pressure source 23, so that the material in the printing temporary ink storage box 10 is extruded from the printing needle 80.
The compound formula 3D printer 100 of extruding of this application embodiment has realized that the printing material mixes promptly and uses, has reduced the step of turnover between the container, uses how many materials just can mix the mode of how many materials, and is high-efficient simple and convenient, has realized the automation with the work of material mixing and printing, becomes more meticulous, and the security is favorable to promoting quality and efficiency that blending material printed.
While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.
Claims (10)
1. A co-extrusion 3D printer for bi-material printing, the bi-material comprising a first material and a second material, the co-extrusion 3D printer comprising:
the temporary printing ink box is used for accommodating the mixed first material and second material or mixing the first material and the second material in the temporary printing ink box;
the discharge driving system is an air pressure driving system and is used for extruding the mixed first material and the mixed second material in the temporary printing ink box out of the temporary printing ink box;
the first material supplementing system is a motor driving system and is used for supplementing a first material into the printing temporary storage ink box;
the second feeding system is a motor driving system and is used for feeding a second material into the printing temporary storage ink box;
the printing nozzle is connected to the discharge end of the printing temporary storage ink box;
and the control system is respectively used for controlling the discharge driving system, the first feeding system and the second feeding system.
2. The compound extrusion 3D printer as in claim 1, wherein the outfeed drive system comprises a piston, a cover, and a pneumatic pressure source;
print the ink horn of keeping in including the chamber that holds that has first opening and second opening, the piston movably set up in hold the intracavity, the piston with the sealed cooperation of inner wall that holds the chamber, the lid is configured to the lid and locates first opening and with print the sealed cooperation of ink horn of keeping in, the atmospheric pressure source connect in the lid and with first opening intercommunication, the second opening does print the discharge gate that keeps in the ink horn.
3. The compound extrusion type 3D printer according to claim 2, wherein each material supplementing system comprises a driving motor, a lead screw, a motor fixing plate, a guide rail, a slider, a bin piston and a material supplementing bin, the driving motor is mounted on the motor fixing plate, the lead screw is connected to an output end of the driving motor, the guide rail is arranged on the motor fixing plate, the guide rail is arranged in parallel with the lead screw, the slider is matched with the guide rail, the slider is sleeved on the lead screw and is in threaded fit with the lead screw, one end of the bin piston is connected to the slider, the other end of the bin piston is slidably arranged in the material supplementing bin, and a discharge end of the material supplementing bin is communicated with the second opening.
4. The compound-extrusion 3D printer of claim 2, further comprising:
and one end of the feeding pipeline is connected with the second opening, and the other end of the feeding pipeline is respectively connected with the first feeding system and the second feeding system.
5. The compound-extrusion 3D printer of claim 4, further comprising:
and the discharge tee joint is respectively connected with the second opening, the feed supplement pipeline and the printing nozzle.
6. The compound extrusion type 3D printer as claimed in claim 5, wherein a material supplementing valve is disposed between the discharge tee and the material supplementing pipeline, a material discharging valve is disposed between the discharge tee and the printing nozzle, the material supplementing valve and the material discharging valve are both electrically connected to the control system, and the material supplementing valve and the material discharging valve are alternatively opened.
7. The compound extrusion type 3D printer according to claim 4, wherein the feeding pipe comprises a feeding tee, a mixing pipe and a feeding connecting pipe, the feeding tee is respectively connected with the first feeding system, the second feeding system and one end of the mixing pipe, the other end of the mixing pipe is connected with one end of the feeding connecting pipe, the other end of the feeding connecting pipe is connected with the second opening, and the mixing pipe is used for mixing the first material and the second material.
8. The compound extrusion type 3D printer as claimed in claim 4, wherein the feed supplement pipeline comprises a feed supplement three-way valve and a feed supplement connecting pipe, the feed supplement three-way valve is respectively connected with the first feed supplement system, the second feed supplement system and one end of the feed supplement connecting pipe, the other end of the feed supplement connecting pipe is connected with the second opening, and the feed supplement three-way valve is used for communicating the first feed supplement system with the feed supplement connecting pipe or communicating the second feed supplement system with the feed supplement connecting pipe.
9. The compound-extrusion 3D printer of claim 1, further comprising:
the printing needle head is arranged at the discharge end of the printing nozzle and used for printing tubular silk materials.
10. The compound extrusion formula 3D printer of claim 9, characterized in that, the printing syringe needle includes outer needle tubing and inlayer needle tubing, the inlayer needle tubing includes first connecting portion and second connecting portion, first connecting portion are one end open-ended tubular structure, the open end of first connecting portion is used for connecting the printing nozzle, the second connecting portion connect in the blind end of first connecting portion, outer needle tubing cover is located the outside of second connecting portion just the one end of outer needle tubing with first connecting portion are connected, outer needle tubing with form discharging channel between the second connecting portion, the blind end seted up with a plurality of through-holes of discharging channel intercommunication.
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