CN210617318U - Spatial performance combination 3D printing apparatus based on liquid instant solidification - Google Patents
Spatial performance combination 3D printing apparatus based on liquid instant solidification Download PDFInfo
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Abstract
The utility model relates to a 3D printing apparatus field, concretely relates to space performance combination 3D printing apparatus based on liquid solidifies in the twinkling of an eye. The 3D printing equipment comprises an execution assembly, a spray head assembly and a control system; the executing assembly comprises a mechanical arm and a numerical control mechanism, and the mechanical arm is in driving connection with the numerical control mechanism; the spray head assembly comprises a spray head box body and a spray head; the spray head box body is fixedly connected with the numerical control mechanism; a volume pump is arranged in the spray head box body; the spray head is hermetically connected with the volume pump; the spray heads comprise a supporting material spray head and a printing material spray head; the control system is in communication connection with the execution assembly.
Description
Technical Field
The utility model relates to a 3D printing apparatus field, concretely relates to space performance combination 3D printing apparatus based on liquid solidifies in the twinkling of an eye.
Background
The liquid substance at normal temperature can be converted into a solid substance under certain conditions. According to the TRIZ theory, the manufacturing principle can be combined with the 3D printing technology, a substance which is liquid at normal temperature is conveyed and extruded through a precision pump, and a solidification environment is created at an extrusion end, so that 3D printing is realized (the 3D printing based on the liquid metering extrusion technology is called). These materials that can be cured include: the glue comprises AB component quick-drying glue, oxidation curing glue, thermosetting glue, ultraviolet curing glue, moisture curing glue and glue obtained by mixing and curing the above curing mechanisms.
Typical liquid-based printers that appear on the market, take thermal curing as an example: two-component mixtures are generally used, and the extruded parts are shaped by thermal curing after extrusion. The curing and forming method consumes a long time during curing, the structure is easy to collapse in the forming process, expected products cannot be obtained well according to the designed mode, the engineering realizability is extremely low, and mass production cannot be basically realized. In addition, the existing printer nozzle assembly is single in use, and needs to be improved in the aspects of accurately metering printing materials, obtaining multifunctional gradient materials through gradient printing of various materials and the like.
SUMMERY OF THE UTILITY MODEL
In view of the above technical problem, the utility model provides a spatial performance combination 3D printing apparatus based on liquid instant solidification, 3D printing apparatus includes executive component, shower nozzle subassembly and control system; the execution assembly comprises a mechanical arm, a three-axis gantry numerical control structure and other numerical control mechanisms; the spray head assembly comprises a volume pump and a spray nozzle; the spray head assembly is fixedly connected with the numerical control mechanism; the volume pump seal is connected with the nozzle in a sealing way; the nozzles include a support material nozzle and a printing material nozzle; the control system is in communication connection with the execution assembly.
As a preferred technical solution, the numerical control mechanism includes a first rotating electrical machine, a second rotating electrical machine, a third rotating electrical machine, a fourth rotating electrical machine, a first joint arm, a second joint arm, and a third joint arm; the first rotating motor is arranged on the base and is fixedly connected with the first joint arm in the horizontal plane direction; the first joint arm and the second joint arm are connected through the second rotating motor; the second joint arm is connected with a third joint arm through the third rotating motor; and the fourth rotating motor is arranged on the third joint arm and is fixedly connected with the spray head assembly.
As a preferable technical scheme, the volume pump is composed of one of a piezoelectric pump, a screw pump and a plunger pump or a plurality of pump groups which are connected in parallel or in series.
As a preferable technical solution, the volume pump can control the rotation speed of a stepping motor or a servo motor arranged at the end of the volume pump through a program on a printing path, and control the flow rate of the liquid extruded by the stepping motor or the servo motor, so as to realize the printing of the gradient material and the structure.
As a preferred technical scheme, the printing equipment at least comprises a supporting spray head assembly, the complicated spatial structure can be printed without collapse, the support is made of a material which is water-soluble or can be easily cleaned by soaking in a solution or by heating, the material can be simply and conveniently cleaned after printing, and even if the supporting material in the part can be removed without damaging a printing piece.
As a preferred technical solution, the spray head assembly is provided with at least a first raw material inlet, a second raw material inlet and a third raw material inlet, and a plurality of inlets may be provided for printing a multi-component material; the first raw material inlet and the second raw material inlet are connected with the printing material nozzle through the volume pump; the third feedstock inlet is connected to the support material nozzle by a volumetric pump.
As a preferable technical scheme, the volume pump can extrude the pigment, three volume pumps connected in parallel are used for arranging raw materials of three primary colors of RGB, the raw materials are mixed according to different component proportions and then extruded, and then the extruded raw materials are mixed with the raw materials to realize color printing.
As a preferred technical solution, the volume pump motor is controlled by a central control board card and is coordinated with the control of the motion actuator.
As a preferred technical scheme, the diameter of a nozzle of the spray head is 0.05-3 mm.
As a preferred technical scheme, the diameter of a nozzle of the spray head is 0.05-0.4 mm.
As a preferable technical solution, a heating device is provided on the support material spray head.
The utility model provides a space performance combination 3D printing apparatus first rotating electrical machines based on liquid solidifies in the twinkling of an eye can use the base to take place rotatoryly as the axle, makes first articulated arm be rotary motion on horizontal plane (xy plane), drives second articulated arm and shower nozzle subassembly simultaneously and rotates on horizontal plane (xy plane), and second rotating electrical machines then drives the shower nozzle subassembly and rotates on perpendicular to horizontal plane (yz plane). Finally, under the linkage action of the four motors, the spray head is adjusted to move in a XY plane at a certain fixed Z-axis position to realize point-line-surface scanning, and at a certain Z height, the liquid spray head assembly realizes scanning and filling of the entity, and the support spray head realizes scanning and filling of the support structure. The fine structure of the printed material can be accurately controlled through the numerical control structure, and materials with different shapes and structures can be printed. And, the utility model discloses in adopt combination shower nozzle subassembly, when the accurate measurement printed material obtained the 3D printing product of meticulous structure, can also utilize the different positions on the route of nozzle scanning, through digital control, adjust the proportion and the flow of multicomponent liquid to realize that multiple material gradient prints and obtain multi-functional gradient material. Specifically, the rotating speed of the volume pump is controlled through a servo motor/a stepping motor, so that the flow rate of printing liquid is controlled, the printing liquid is extruded from a nozzle to be molded, and the servo motor/the stepping motor is controlled by a control system to operate through a central control board card. Meanwhile, the control system receives path data analysis and sends the path data analysis to the execution assembly by controlling the execution assembly by the central control board card, realizes spatial motion of XYZ three axes by a linkage motor, and supports parameters such as extrusion/non-extrusion by controlling extrusion/non-extrusion on a nozzle path, more extrusion amount/less extrusion amount, large/small liquid component proportion, and the like, thereby realizing printing of a fine structure in a three-dimensional space.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the utility model provides a space performance combination 3D printing apparatus structure sketch map based on liquid solidifies in the twinkling of an eye.
Fig. 2 is the utility model provides a space performance combination 3D printing apparatus structure sketch map based on liquid solidifies in the twinkling of an eye.
Fig. 3 is a schematic structural view of a volumetric pump in embodiment 1 of the present invention.
Fig. 4 is a schematic structural view of a volumetric pump in embodiment 2 of the present invention.
Fig. 5 is a schematic structural view of a volumetric pump in embodiment 3 of the present invention.
Fig. 6 is the utility model provides a space performance combination 3D printing apparatus structure sketch map based on liquid solidifies in the twinkling of an eye.
Wherein, 01-a control system, 02-an execution component, 03-a central control board card, 1-a first rotating motor, 2-a second rotating motor, 3-a third rotating motor, 4-a fourth rotating motor, 5-a first raw material inlet, 6-a second raw material inlet, 7-a third raw material inlet, 8-a supporting material volume pump, 9-a printing material volume pump, 10-a base, 11-a first joint arm, 12-a second joint arm, 13-a third joint arm, 14-a spray head component, 15-a discharge port, 16-a feed port, 17-a servo motor, 18-piezoelectric ceramics, 19-a diaphragm, 20-an extrusion port, 21-a feed port, 22-a stepping motor, 23-a first universal joint and 24-a second universal joint, 25-second feed valve, 26-discharge valve, 27-first feed valve, 28-support material jet assembly, 29-printing material jet assembly, 30-support material.
Detailed Description
The technical features of the technical solutions provided in the present invention will be described more clearly and completely with reference to the following detailed description, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Furthermore, it will be understood that, although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
The utility model provides a space performance combination 3D printing device based on liquid instant solidification, wherein the 3D printing device comprises an execution assembly, a spray head assembly and a control system; the execution assembly comprises a mechanical arm, a three-axis gantry numerical control structure and other numerical control mechanisms; the spray head assembly comprises a volume pump and a spray nozzle; the spray head assembly is fixedly connected with the numerical control mechanism; the volume pump seal is connected with the nozzle in a sealing way; the nozzles include a support material nozzle and a printing material nozzle; the control system is in communication connection with the execution assembly.
The utility model provides a spatial properties combination 3D printing apparatus based on liquid solidifies in the twinkling of an eye mainly comprises four parts, wherein the executive component includes arm, triaxial longmen numerical control structure and other numerical control mechanism. The utility model discloses in numerical control structure does not do the special restriction, can be triaxial numerical control structure or other numerical control mechanism, and its main function is by the mechanical part of being connected with it drive shower nozzle subassembly orbit motion as required, realizes controlled motion in the XYZ space.
In some embodiments, the numerical control mechanism includes a first rotary motor, a second rotary motor, a third rotary motor, a fourth rotary motor, a first articulated arm, a second articulated arm, and a third articulated arm; the first rotating motor is arranged on the base and is fixedly connected with the first joint arm in the horizontal plane direction; the first joint arm and the second joint arm are connected through the second rotating motor; the second joint arm is connected with a third joint arm through the third rotating motor; and the fourth rotating motor is arranged on the third joint arm and is fixedly connected with the spray head assembly.
The first rotating motor can rotate by taking the base as an axis, so that the first articulated arm rotates on a horizontal plane (xy plane), the second articulated arm and the spray head assembly are driven to rotate on the horizontal plane (xy plane) at the same time, and the second rotating motor drives the spray head assembly to rotate on a horizontal plane (yz plane) perpendicular to the horizontal plane. Finally, under the linkage action of the four motors, the spray head is adjusted to move in a XY plane at a certain fixed Z-axis position to realize point-line-surface scanning, and at a certain Z height, the liquid spray head assembly realizes scanning and filling of the entity, and the support spray head realizes scanning and filling of the support structure. The fine structure of the printed material can be accurately controlled through the numerical control structure, the materials with different shapes and structures can be printed, and collapse can not occur when the structure is complicated.
In some embodiments, the printing device comprises at least one supporting nozzle assembly, the printing device can print complicated spatial structures without collapse, the support is made of a material which is water-soluble or can be easily cleaned by soaking in a solution or by heating, the material can be simply and conveniently cleaned after printing, and even the supporting material in the part can be removed without damaging a printing piece.
In some embodiments, the volumetric pump can extrude the pigment, three volumetric pumps connected in parallel are used for arranging raw materials of three primary colors of RGB, the raw materials are mixed according to different component ratios and then extruded, and the extruded raw materials are mixed with the materials to realize color printing.
The utility model discloses in control system mainly is digital control system, "master control integrated circuit board" promptly. The main control board card is responsible for analyzing the path file and sending the path file to a motor of the executing mechanism, and spatial motion of XYZ three axes is realized through linkage of the motor. Specifically, the geometric shape of a product is designed through three-dimensional CAD, a three-dimensional graph is converted into GCODE through 3D printing path planning software such as Cura and the like, the GCODE is input into a main control board card, a motor of an execution assembly and a motor of a spray head assembly are controlled, and the designed product is obtained through printing in a three-dimensional space. The 3D printing entity and the supporting material are extruded and controlled through the same process.
In some embodiments, the volume pump is composed of one of a piezoelectric pump, a screw pump and a plunger pump, or a plurality of pump groups connected in parallel or in series.
The utility model discloses in the piezoelectric pump comprises piezoceramics, diaphragm, feed inlet and discharge gate, and wherein piezoceramics can take place compression, expansion after giving a voltage or electric current, and the high-frequency signal of telecommunication changes, can turn into quantitative flow with the frequency signal who changes to realize accurate measurement.
The utility model discloses in the screw pump mainly includes servo motor, screw rod, discharge gate etc. because the number of turns of rotation of screw pump has corresponding relation with the flow. By utilizing the principle, the rotating turns of the screw can be accurately driven by using a stepping or servo motor, so that extremely accurate extrusion is realized.
The utility model discloses in the plunger pump can be single-stroke plunger pump, also can be two-stroke plunger pump, and wherein when two-stroke plunger pump first stroke was extruded, the material was inhaled in the second stroke, goes on in turn to realize very level and smooth flow output. A more even flow output can be achieved using multiple strokes.
In some embodiments, at least a first material inlet, a second material inlet and a third material inlet are provided on the spray head assembly, and there may be a plurality of inlets for printing multi-component materials; the first raw material inlet and the second raw material inlet are connected with the printing material nozzle through the volume pump; the third material inlet is connected to the support material nozzle by a volume pump, wherein the volume pump connecting the support material nozzle to the printing material nozzle is independent. If the printing material is a single-component liquid material, the first raw material inlet or the second raw material inlet can be selected to convey the raw materials into a volume pump connected with a printing material nozzle, the raw materials are metered by the volume pump and are extruded from the printing material nozzle to finish printing. After the solid printing of the parts of each layer is completed, the support material is conveyed to a volume pump connected with the support material nozzle through a third raw material inlet, is metered by the volume pump and is extruded through the support material nozzle to complete the printing of the support material.
The utility model discloses the nozzle in the well shower nozzle subassembly is better from the distance of pump head shorter more, is favorable to controlling the flow of printing material, and with on the market other schemes all arrange far away, adopt modes such as long-range conveyer pipe to compare, can avoid the pressure to have reached the high back conveyer pipe and warp and lead to the inaccurate scheduling problem of measurement. And the control system controls the spray head assembly, so that different positions on a nozzle path can have different liquid amounts and different liquid mixing ratios, thereby realizing gradient material printing.
In some embodiments, the nozzle diameter of the spray head is 0.05-3 mm; preferably, the diameter of a nozzle of the spray head is 0.05-0.4 mm.
The utility model discloses in PLA, ABS, PVA, PVP etc. can be chooseed for use to support material nozzle extrusion moulding's support material. These materials are drawn into filaments, heated to their melt temperature, extruded and cured instantaneously to provide effective support for the soft liquid extruded structures. Preferably, the support material is made of water-soluble polymer material, such as PVA, PVP and the like, and after printing, the support is soaked in water to remove the support, and the workpiece is left. Moreover, because the printing mode of the printing material is different from that of the supporting material, a supporting material nozzle is needed if the printing of the supporting material is realized.
In some embodiments, the printing device comprises at least one supporting nozzle assembly, the printing device can print complicated spatial structures without collapse, the support is made of a material which is water-soluble or can be easily cleaned by soaking in a solution or by heating, the material can be simply and conveniently cleaned after printing, and even the supporting material in the part can be removed without damaging a printing piece.
The support material in the utility model can also be extruded and solidified by using a liquid material similar to the main body material to form a support, but the liquid material must be water-soluble or can be removed in a nondestructive mode by means of heating and the like.
In order to enable the thermoplastic polymer material to flow normally in the nozzle assembly and be extruded smoothly, in some embodiments, the support material nozzle is provided with a heating device. The heating device is not particularly limited, and may be a sleeve electric heating device or the like.
Through the plunger pumps connected in parallel, each pump can independently control the conveyed printing raw materials, the extrusion proportion of each component can be adjusted in real time under the control of a G code in a control system, and the gradient materials with different performances at different positions can be obtained through printing and forming.
In some embodiments, the volume pump motor is controlled by a central control board and is coordinated with the control of the motion actuators.
A second aspect of the present invention provides a spatial performance combination 3D printing apparatus and method based on liquid instant curing, utilizing the above-described 3D printing apparatus.
The utility model discloses well material that is used for 3D to print is liquid under the normal atmospheric temperature to can realize second level solidification under light, electricity, heat, catalyst. The materials are not specially limited, and a double (multi) component mixed curing adhesive material can be selected; thermally and photo-curable adhesive materials; catalysts (oxidative, moisture) cure glue materials and the like including, but not limited to, multi-component polyurethanes, multi-component epoxies, multi-component silicones, and the like.
Since the printed liquid material cannot support its own weight, if the curing speed after mixing is too slow, it is liable to deform itself before uncured molding to cause printing failure. It is desirable that the printed material have a short cure time to achieve second level curing. In some embodiments, the time for the printed liquid mass to solidify and stop flowing after extrusion is 120 seconds or less, and the time to reach 40% of full solidification strength is less than 50 seconds.
In some embodiments, the flow rate of the printing liquid material is 0.01-100 cm3Min, flow control accuracy: plus or minus (1% -5%). By adopting the specific volume pump or the combined volume pump, the flow of the printing material is accurately controlled, and the printing is facilitated to obtain the 3D forming material with a fine and stable structure.
In some embodiments, the viscosity of the printing liquid material ranges from 100000-.
The utility model discloses well printing material's viscosity can show the shape that influences printing material formation trickle after extruding from printing material nozzle, the pressure etc. in the printing material nozzle, can direct influence print the process go on smoothly. If the viscosity of the printing material is too high, high pressure is easily formed in the printing material nozzle, so that the material is extruded from the printing material nozzle and then has an opening swelling phenomenon, which causes uneven trickle or liquid fracture and is not easy to form. And if the viscosity of the printing material is too low, the printing formed product is easily caused to have a structure which is not fine enough and cannot be piled up for forming, and the quality is influenced. Therefore, the viscosity of the printing liquid material in the utility model is controlled within the range of 100000-3000000 CPS.
In some embodiments, the volumetric pump can extrude the pigment, three volumetric pumps connected in parallel are used for arranging raw materials of three primary colors of RGB, the raw materials are mixed according to different component ratios and then extruded, and the extruded raw materials are mixed with the materials to realize color printing.
The present invention will be described in detail with reference to the following examples. It is necessary to point out here that the following examples are only used for further illustration of the present invention, and should not be interpreted as limiting the scope of the present invention, and that the skilled person in this field can make some insubstantial modifications and adjustments according to the above-mentioned contents of the present invention, and still fall within the scope of the present invention.
Examples
Example 1: referring to fig. 1 to 3 and 6, the embodiment provides a spatial performance combination 3D printing device based on liquid instant curing, where the 3D printing device includes an execution component 02, a nozzle component and a control system 01; the executing assembly comprises a mechanical arm and other numerical control mechanisms; the spray head assembly comprises a volume pump and a spray nozzle; the spray head assembly is fixedly connected with the numerical control mechanism; the spray head assembly comprises a support material volume pump 8 and a printing material volume pump 9, the structure of which is shown in fig. 3; the volume pump comprises a servo motor 17, a feeding hole 16 and a discharging hole 15; the nozzle is hermetically connected with a discharge hole 15 of the volumetric pump; the control system is in communication connection with the execution assembly. The numerical control mechanism comprises a first rotating motor 1, a second rotating motor 2, a third rotating motor 3, a fourth rotating motor 4, a first joint arm 11, a second joint arm 12 and a third joint arm 13; the first rotating motor 1 is arranged on a base 10 and fixedly connected with the first joint arm 11 in the horizontal plane direction; the first articulated arm 11 and the second articulated arm 12 are connected by the second rotating electrical machine 2; the second joint arm 12 and the third joint arm 13 are connected by the third rotating electrical machine 3; the fourth rotating electrical machine 4 is arranged on the third joint arm 13 and is fixedly connected with the spray head assembly 14. The spray head component 14 is provided with a first raw material inlet 5 and a second raw material inletA feedstock inlet 6 and a third feedstock inlet 7; the first raw material inlet 5 and the second raw material inlet 6 are connected with the printing material nozzle 9 through a feed opening 16 of the volume pump; the third raw material inlet 7 is connected with the support material nozzle 8 through a volume pump; the nozzle diameter of the nozzles (including the printing material nozzle and the support material nozzle) was 0.25 mm; wherein the printing material is moisture-curable polyurethane with viscosity of 100000CPS, the supporting material is polyvinyl alcohol (PVP), and the flow rate of the printing liquid material is 0.2cm3/min。
After the 3D model is designed by 3D modeling software, 3D printing slices and filling software (such as Cura) are converted into GCode files, the GCode files are transmitted to a main control board card through an SD card, an Ethernet, WIFI and the like, the main control board card controls each motor of an execution mechanism to realize XYZ spatial motion, meanwhile, the main control board card controls each motor (servo or stepping) of a volume pump or a volume pump group, liquid is extruded out of the pump head through the pump head, and printing is realized through a nozzle. The extrusion amount of each component is controlled by controlling the rotating speed of a motor of the volume pump, so that the control on the extrusion ratio and the extrusion flow rate are realized, and printing structures with different performances can be formed on different coordinates, paths or blocks to form gradient printing. Or when the material extruded by the volumetric pump is pigment, the coloring can be realized.
Example 2: referring to fig. 1, 2, 4 and 6, the embodiment provides a spatial performance combination 3D printing device based on liquid instant solidification, wherein the 3D printing device comprises an execution component 02, a spray head component and a control system 01; the executing assembly comprises a mechanical arm and other numerical control mechanisms; the spray head assembly comprises a volume pump and a spray nozzle; the spray head assembly is fixedly connected with the numerical control mechanism; the spray head assembly comprises a support material volume pump 8 and a printing material volume pump 9, the structure of which is shown in fig. 4; the volumetric pump comprises a piezoelectric ceramic 18, a diaphragm 19, an extrusion orifice 20 and a (double-pipe) feed orifice 21; the nozzle is connected with the extrusion port 20 of the volumetric pump in a sealing way; the control system is in communication connection with the execution assembly. The numerical control mechanism comprises a first rotating motor 1, a second rotating motor 2, a third rotating motor 3, a fourth rotating motor 4, a first joint arm 11, a second joint arm 12 and a second joint armA three-joint arm 13; the first rotating motor 1 is arranged on a base 10 and fixedly connected with the first joint arm 11 in the horizontal plane direction; the first articulated arm 11 and the second articulated arm 12 are connected by the second rotating electrical machine 2; the second joint arm 12 and the third joint arm 13 are connected by the third rotating electrical machine 3; the fourth rotating electrical machine 4 is arranged on the third joint arm 13 and is fixedly connected with the spray head assembly 14. The spray head assembly 14 is provided with a first raw material inlet 5, a second raw material inlet 6 and a third raw material inlet 7; the first and second raw material inlets 5 and 6 are connected to the printing material nozzle 9 through a supply port 21 of the volumetric pump; the third raw material inlet 7 is connected with the support material nozzle 8 through a volume pump; the nozzle diameter of the nozzles (including the printing material nozzle and the support material nozzle) was 0.3 mm; wherein the printing material is mixed solidified silica gel with viscosity of 1000000CPS, the supporting material is polyvinyl alcohol (PVA), and the flow rate of the printing liquid material is 0.2cm3/min。
After the 3D model is designed by 3D modeling software, 3D printing slices and filling software (such as Cura) are converted into GCode files, the GCode files are transmitted to a main control board card through an SD card, an Ethernet, WIFI and the like, the main control board card controls each motor of an execution mechanism to realize XYZ spatial motion, meanwhile, the main control board card controls each motor (servo or stepping) of a volume pump or a volume pump group, liquid is extruded out of the pump head through the pump head, and printing is realized through a nozzle. The extrusion amount of each component is controlled by controlling the rotating speed of a motor of the volume pump, so that the control on the extrusion ratio and the extrusion flow rate are realized, and printing structures with different performances can be formed on different coordinates, paths or blocks to form gradient printing. Or when the material extruded by the volumetric pump is pigment, the coloring can be realized.
Example 3: referring to fig. 1, 2, 5 and 6, the embodiment provides a spatial performance combination 3D printing device based on liquid instant solidification, wherein the 3D printing device comprises an execution component 02, a spray head component and a control system 01; the executing assembly comprises a mechanical arm and other numerical control mechanisms; the spray head assembly comprises a volume pump and a spray nozzle; the spray head component is fixedly connected with the numerical control mechanism(ii) a The spray head assembly comprises a support material volume pump 8 and a printing material volume pump 9, the structure of which is shown in fig. 4; the volume pump comprises a stepping motor 22, a first universal joint 23, a second universal joint 24, a second feeding valve 25, a discharging valve 26 and a first feeding valve 27; the nozzle is connected with a feed valve of the volumetric pump in a sealing way; the control system is in communication connection with the execution assembly. The numerical control mechanism comprises a first rotating motor 1, a second rotating motor 2, a third rotating motor 3, a fourth rotating motor 4, a first joint arm 11, a second joint arm 12 and a third joint arm 13; the first rotating motor 1 is arranged on a base 10 and fixedly connected with the first joint arm 11 in the horizontal plane direction; the first articulated arm 11 and the second articulated arm 12 are connected by the second rotating electrical machine 2; the second joint arm 12 and the third joint arm 13 are connected by the third rotating electrical machine 3; the fourth rotating electrical machine 4 is arranged on the third joint arm 13 and is fixedly connected with the spray head assembly 14. The spray head assembly 14 is provided with a first raw material inlet 5, a second raw material inlet 6 and a third raw material inlet 7; the first and second raw material inlets 5 and 6 are connected to the printing material nozzle 9 through first and second feed valves 27 and 25 of the volumetric pump, respectively; the third raw material inlet 7 is connected with the support material nozzle 8 through a volume pump; the nozzle diameter of the nozzles (including the printing material nozzle and the support material nozzle) was 0.3 mm; wherein the printing material is moisture-curable polyurethane with viscosity of 100000CPS, the supporting material is polyvinyl alcohol (PVP), and the flow rate of the printing liquid material is 0.2cm3/min。
After the 3D model is designed by 3D modeling software, 3D printing slices and filling software (such as Cura) are converted into GCode files, the GCode files are transmitted to a main control board card through an SD card, an Ethernet, WIFI and the like, the main control board card controls each motor of an execution mechanism to realize XYZ spatial motion, meanwhile, the main control board card controls each motor (servo or stepping) of a volume pump or a volume pump group, liquid is extruded out of the pump head through the pump head, and printing is realized through a nozzle. The extrusion amount of each component is controlled by controlling the rotating speed of a motor of the volume pump, so that the control on the extrusion ratio and the extrusion flow rate are realized, and printing structures with different performances can be formed on different coordinates, paths or blocks to form gradient printing. Or when the material extruded by the volumetric pump is pigment, the coloring can be realized.
The drawings of the embodiments of the disclosure only relate to the structures related to the embodiments of the disclosure, and other structures can refer to the common design.
For purposes of clarity, the thickness of layers or regions in the figures used to describe embodiments of the present disclosure are exaggerated or reduced, i.e., the figures are not drawn on a true scale.
Without conflict, embodiments of the present disclosure and features of the embodiments may be combined with each other to arrive at new embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may modify or change the technical content disclosed above into equivalent embodiments with equivalent changes, but all those skilled in the art do not depart from the technical scope of the present invention, and any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (8)
1. The space performance combination 3D printing equipment based on the liquid instant solidification is characterized in that the 3D printing equipment comprises an execution assembly, a spray head assembly and a control system; the execution assembly comprises a mechanical arm, a three-axis gantry numerical control structure and other numerical control mechanisms; the spray head assembly comprises a volume pump and a spray nozzle; the spray head assembly is fixedly connected with the numerical control mechanism; the volume pump seal is connected with the nozzle in a sealing way; the nozzles include a support material nozzle and a printing material nozzle; the control system is in communication connection with the execution assembly.
2. The liquid flash solidification based spatial property combination 3D printing device of claim 1, wherein the numerical control mechanism includes a first rotating motor, a second rotating motor, a third rotating motor, a fourth rotating motor, a first articulated arm, a second articulated arm, and a third articulated arm; the first rotating motor is arranged on the base and is fixedly connected with the first joint arm in the horizontal plane direction; the first joint arm and the second joint arm are connected through the second rotating motor; the second joint arm is connected with a third joint arm through the third rotating motor; and the fourth rotating motor is arranged on the third joint arm and is fixedly connected with the spray head assembly.
3. The spatial property combination 3D printing device based on liquid instant solidification according to claim 2, wherein the volume pump is composed of one of a piezoelectric pump, a screw pump and a plunger pump, or a plurality of pump groups connected in parallel or in series.
4. The spatial property combination 3D printing device based on liquid instant solidification according to claim 3, characterized in that the volume pump can realize the printing of gradient materials and structures by controlling the rotation speed of a stepping motor or a servo motor arranged at the end part of the volume pump through a program and controlling the flow rate of liquid extruded by the stepping motor or the servo motor on the printing path.
5. The liquid instant solidification-based spatial performance combination 3D printing device as claimed in claim 1, wherein the printing device comprises at least one support nozzle assembly, complex spatial structures can be printed without collapse, the support is made of a material which is water-soluble or can be easily removed by soaking in a solution or by heating, and the material can be simply and conveniently removed after printing.
6. The liquid instant solidification-based spatial performance combination 3D printing device as claimed in claim 2, wherein the nozzle assembly is provided with at least a first material inlet, a second material inlet and a third material inlet; the first raw material inlet and the second raw material inlet are connected with the printing material nozzle through the volume pump; the third feedstock inlet is connected to the support material nozzle by a volumetric pump.
7. The liquid instant solidification-based spatial performance combination 3D printing device as claimed in claim 1, wherein the volume pump can extrude pigment, three volume pumps connected in parallel are used for arranging raw materials of RGB three primary colors, the raw materials are mixed according to different component ratios, then the mixture is extruded and then mixed with materials to realize color printing.
8. The liquid flash solidification based spatial performance combination 3D printing apparatus of claim 1, wherein the volumetric pump motor is controlled by a central control board and is coordinated with control of a motion actuator.
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| CN201921474730.XU CN210617318U (en) | 2019-09-05 | 2019-09-05 | Spatial performance combination 3D printing apparatus based on liquid instant solidification |
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| CN201921474730.XU CN210617318U (en) | 2019-09-05 | 2019-09-05 | Spatial performance combination 3D printing apparatus based on liquid instant solidification |
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