ABSTRACT
Abstract
The present disclosure provides a multi-material photocuring 3D printer and a 3D printing method, wherein multi-material photocuring 3D printer comprises: a frame; a printing platform, arranged on frame; a lifting device, arranged on printing platform; a rotary motor, arranged on lifting device; a printing plate, arranged on rotary motor; wherein a bottom surface of printing plate is a printing plane; a plurality of resin slots, arranged on frame and located below printing plate; an optical engine, arranged on frame and located below printing plate. The present disclosure connects printing plate with rotary motor, after finishing printing with one material, it is possible to remove residual liquid resin on printed piece and printing plane by a method of high-speed centrifugation, to avoid any contaminations to printed piece, thereby ensuring printed piece in multi-material having a high precision and a high resolution.
Description
CROSS-REFERENCES TO RELATED APPLICATIONS
This application claims priority to Chinese Patent Application No. 202110099819.8, filed on Jan. 25, 2021, the content of all of which is incorporated herein by reference.
FIELD OF THE INVENTION
The present disclosure relates to the technical field of 3D printing, more particularly, to a multi-material photocuring 3D printer and a 3D printing method.
BACKGROUND
Currently, in a field of photo-curing 3D printing, there are a plurality of graphic methods mainly including: Digital Light Procession (DLP), Liquid Crystal Display (LCD), Stereo Lithography Apparatus (SLA), and more.
A conventional photocuring 3D printing method is able to print with only one material in a single printing, and unable to achieve a switched printing between multiple materials, or a combination with a soft material and a hard material, as well as unable to achieve a multi-material photocuring 3D printing.
At present, although there have been a plurality of studies on a multi-material DLP 3D printing, most are achieved by adding an amount of resin slots to achieve a multi-material printing, however such a method may cause a serious pollution to a printed piece, thus still having a certain distance away from a target of a high precision and a multi-material. Therefore, a technical core of the multi-material photocuring 3D printing is cleaning a residual liquid when switching a material, so as to ensure that there is no pollution introduced. Therefore, a switching method of adding resin slots only, cannot really solve a problem.
In order to avoid from having a pollution induced during switching the resin slots, generally a cleaning slot and a drying slot will be added, wherein the cleaning slot has alcohol or other organic solvents contained, being able to clean and remove the resin on a surface of the printed piece, and the drying slot dries and removes a residual cleaning liquid on the surface of the printed piece, followed by printing with a second material. Although such a cleaning and drying method is able to remove most residual liquid, it still has a plurality of drawbacks: first, a plurality of repeated cleaning may cause damaging a printed structure, making a dimensional accuracy of the printed piece decrease. In addition, adding a cleaning process cannot be truly pollution-free, while there are still some residual organic solvent on the surface of the printed piece, causing inducing a new pollution repeatedly, thus resulting in a decrease in a resolution of the printed piece.
Therefore, the current technology needs to be improved and developed.
BRIEF SUMMARY OF THE DISCLOSURE
According to the above described defects in the prior art, a purpose of the present disclosure is providing a multi-material photocuring 3D printer and a 3D printing method, to solve a problem in the prior art that the accuracy and the resolution of the printed piece decrease due to cleaning and removing the resin on the surfaces of the printed pieces in an existing multi-material photocuring 3D printer.
A technical solution of the present disclosure to solve the technical problems is as follows:
a multi-material photocuring 3D printer, comprising: a frame; a printing platform, arranged on the frame; a lifting device, arranged on the printing platform; a rotary motor, arranged on the lifting device; a printing plate, arranged on the rotary motor; wherein a bottom surface of the printing plate is a printing plane; a plurality of resin slots, arranged on the frame and located below the printing plate; an optical engine, arranged on the frame and located below the printing plate.
A further configuration of the present disclosure, wherein the multi-material photocuring 3D printer comprises:
a locking device, arranged on the lifting device; the rotary motor is arranged on the locking device; wherein the printing plate restores to an initial absolute position through the locking device.
A further configuration of the present disclosure, wherein the locking device comprises:
a bracket; a first cylinder, arranged on the bracket; a clamping assembly, arranged on the first cylinder; a clamped piece, arranged on the rotary motor and located at a middle position of the clamping assembly; wherein, the rotary motor is a double axis high-speed DC motor, the printing plate connects to a bottom end of the rotary motor through a flange coupling, and the clamped piece is arranged on a top end of the rotary motor.
A further configuration of the present disclosure, wherein the clamping assembly further comprises:
two clamping blocks, the clamping blocks are arranged oppositely on the first cylinder; a clamping permanent magnet, arranged in the clamping block; the clamped piece comprising: a clamped block, arranged above the rotary motor; a rotary permanent magnet, arranged in the clamped block. A further configuration of the present disclosure, wherein the multi-material photocuring 3D printer further comprises: two resin collection devices, the resin collection devices are arranged oppositely on the frame; wherein, the resin collection device comprises: a first connecting plate, arranged on the frame; a second cylinder, arranged on the first connecting plate; a second connecting plate, arranged on the second cylinder; a third cylinder, arranged on the second connecting plate; a first collection slot, arranged on the third cylinder; wherein, an extension direction of the third cylinder is perpendicular to an extension direction of the second cylinder.
A further configuration of the present disclosure, wherein the multi-material photocuring 3D printer further comprises:
two post-curing devices, the post-curing devices are arranged oppositely and located on a side of the resin collection device; wherein, the post-curing device comprises: a third connecting plate, arranged on the frame; a fourth cylinder, arranged on the third connecting plate; a fourth connecting plate, arranged on the fourth cylinder; a fifth cylinder, arranged on the fourth connecting plate; a post-curing slot, arranged on the fifth cylinder; a UV curing light-emitting diode, arranged on the post-curing slot; wherein, an extension direction of the fifth cylinder is perpendicular to an extension direction of the fourth cylinder.
A further configuration of the present disclosure, wherein the multi-material photocuring 3D printer further comprises:
a resin slot switching device, arranged on the frame; the resin slots are arranged on the resin slot switching device; wherein, the resin slot switching device comprises: a driving assembly, arranged on the frame; a leveling plate, arranged on the driving assembly; a base plate, arranged on the leveling plate; wherein the resin slots are arranged on the base plate at an interval; a plurality of first leveling assemblies, arranged on the leveling plate and connected to the base plate; wherein, the first leveling assembly comprises: a fifth connecting plate, connected to the base plate; a first bolt, inserted through the fifth connecting plate; a first spring, sleeved on the first bolt; a first screw block, arranged on the leveling plate, and threadedly connected with the first bolt.
A further configuration of the present disclosure, wherein the printing platform comprises:
a plurality of second adjusting assemblies, the plurality of second adjusting assemblies are arranged on the bracket, and connected with the printing platform; wherein, the second adjusting assembly comprises: a second bolt, penetrating through the printing platform; a second spring, sleeved on the second bolt; a second screw block, arranged on the frame and threadedly connected with the second bolt.
A further configuration of the present disclosure, wherein the lifting device comprises:
a first mounting dock, arranged on the printing platform; a first driving motor, arranged on the first mounting dock and connected with the bracket; the driving assembly comprises: a second mounting dock, arranged on the frame; a second driving motor, arranged on the second mounting dock and connected with the leveling plate.
According to a same inventive concept, the present disclosure further provides a printing method for the multi-material photocuring 3D printer, applied to the multi-material photocuring 3D printer stated above, wherein the method comprises:
adjusting a distance from the printing plane to the bottom surface of the resin slot, to make a focal point of the optical engine align with the bottom surface of the resin slot; wherein the resin slot has a resin material placed in, and the material in each of the resin slot is corresponding to a material set in a 3D model of the printed piece; controlling the lifting device to move the printing plane to a distance having a thickness of one slice layer from the bottom surface of the resin slot; controlling the optical engine project a projection pattern corresponding to the current layer, to complete printing the current layer; wherein, if there is any other material existing in the current layer, or a material of a next layer is inconsistent with the material of the current layer, then controlling the rotary motor to spin, so as to remove any residual resin liquid on the printed piece and the printing plane by a method of spinning and centrifugation.
A further configuration of the present disclosure, the method further comprises:
collecting the residual resin liquid after removing the residual resin liquid on the printing plane, when it is needed to switch to another material for printing.
A further configuration of the present disclosure, the method further comprises:
performing a post-curing process on a designated layer.
The present disclosure provides a multi-material photocuring 3D printer and a 3D printing method, wherein the multi-material photocuring 3D printer comprises: a frame; a printing platform, arranged on the frame; a lifting device, arranged on the printing platform; a rotary motor, arranged on the lifting device; a printing plate, arranged on the rotary motor; wherein a bottom surface of the printing plate is a printing plane; a plurality of resin slots, arranged on the frame and located below the printing plate; an optical engine, arranged on the frame and located below the printing plate. The present disclosure connects the printing plate with the rotary motor, after finishing printing with one material, it is possible to remove the residual liquid resin on the printed piece and the printing plane by a method of high-speed centrifugation, to avoid any contaminations to the printed piece, thereby ensuring the printed piece in multi-material having a high precision and a high resolution.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to describe the embodiments of the present disclosure or the technical solutions in the prior art more clearly, a plurality of drawings used in the description of the embodiments or the prior art will be briefly introduced hereafter. Obviously, the drawings in the following description are some embodiments of the present disclosure only, those of ordinary skills in the present art, without any creative work, may obtain other drawings based on the structure shown in these drawings.
FIG. 1 illustrates a schematic diagram on an overall structure of the multi-material photocuring 3D printer in the present disclosure.
FIG. 2 illustrates a schematic diagram on a structure of the printing platform and the second adjusting assembly in the present disclosure.
FIG. 3 illustrates a schematic diagram on a structure of the rotary motor and the locking device in the present disclosure.
FIG. 4 illustrates a schematic diagram on a structure of the clamping assembly in the present disclosure.
FIG. 5 illustrates a schematic diagram on a structure of the clamped piece in the present disclosure.
FIG. 6 illustrates a schematic diagram on a structure of the resin collection device and a structure of the post-curing device in the present disclosure.
FIG. 7 illustrates a schematic diagram on a structure of the resin slot and a structure of the resin slot switching device in the present disclosure.
FIG. 8 illustrates a schematic diagram on a structure of the optical engine and a structure of a third mounting dock in the present disclosure.
FIG. 9 illustrates a schematic flow chart on a printing method of the multi-material photocuring 3D printer in the present disclosure.
Numerals in the figures: 1 , frame; 2 , printing platform; 3 , lifting device; 31 , first mounting dock; 32 , first driving motor; 4 , rotary motor; 41 , flange coupling; 5 , printing plate; 6 , resin slot; 7 , optical engine; 71 , third mounting dock; 8 , locking device; 81 , bracket; 82 , first cylinder; 83 ,
CROSS-REFERENCES TO RELATED APPLICATIONS
This application claims priority to Chinese Patent Application No. 202110099819.8, filed on Jan. 25, 2021, the content of all of which is incorporated herein by reference.
FIELD OF THE INVENTION
The present disclosure relates to the technical field of 3D printing, more particularly, to a multi-material photocuring 3D printer and a 3D printing method.
BACKGROUND
Currently, in a field of photo-curing 3D printing, there are a plurality of graphic methods mainly including: Digital Light Procession (DLP), Liquid Crystal Display (LCD), Stereo Lithography Apparatus (SLA), and more.
A conventional photocuring 3D printing method is able to print with only one material in a single printing, and unable to achieve a switched printing between multiple materials, or a combination with a soft material and a hard material, as well as unable to achieve a multi-material photocuring 3D printing.
At present, although there have been a plurality of studies on a multi-material DLP 3D printing, most are achieved by adding an amount of resin slots to achieve a multi-material printing, however such a method may cause a serious pollution to a printed piece, thus still having a certain distance away from a target of a high precision and a multi-material. Therefore, a technical core of the multi-material photocuring 3D printing is cleaning a residual liquid when switching a material, so as to ensure that there is no pollution introduced. Therefore, a switching method of adding resin slots only, cannot really solve a problem.
In order to avoid from having a pollution induced during switching the resin slots, generally a cleaning slot and a drying slot will be added, wherein the cleaning slot has alcohol or other organic solvents contained, being able to clean and remove the resin on a surface of the printed piece, and the drying slot dries and removes a residual cleaning liquid on the surface of the printed piece, followed by printing with a second material. Although such a cleaning and drying method is able to remove most residual liquid, it still has a plurality of drawbacks: first, a plurality of repeated cleaning may cause damaging a printed structure, making a dimensional accuracy of the printed piece decrease. In addition, adding a cleaning process cannot be truly pollution-free, while there are still some residual organic solvent on the surface of the printed piece, causing inducing a new pollution repeatedly, thus resulting in a decrease in a resolution of the printed piece.
Therefore, the current technology needs to be improved and developed.
BRIEF SUMMARY OF THE DISCLOSURE
According to the above described defects in the prior art, a purpose of the present disclosure is providing a multi-material photocuring 3D printer and a 3D printing method, to solve a problem in the prior art that the accuracy and the resolution of the printed piece decrease due to cleaning and removing the resin on the surfaces of the printed pieces in an existing multi-material photocuring 3D printer.
A technical solution of the present disclosure to solve the technical problems is as follows:
a multi-material photocuring 3D printer, comprising: a frame; a printing platform, arranged on the frame; a lifting device, arranged on the printing platform; a rotary motor, arranged on the lifting device; a printing plate, arranged on the rotary motor; wherein a bottom surface of the printing plate is a printing plane; a plurality of resin slots, arranged on the frame and located below the printing plate; an optical engine, arranged on the frame and located below the printing plate.
A further configuration of the present disclosure, wherein the multi-material photocuring 3D printer comprises:
a locking device, arranged on the lifting device; the rotary motor is arranged on the locking device; wherein the printing plate restores to an initial absolute position through the locking device.
A further configuration of the present disclosure, wherein the locking device comprises:
a bracket; a first cylinder, arranged on the bracket; a clamping assembly, arranged on the first cylinder; a clamped piece, arranged on the rotary motor and located at a middle position of the clamping assembly; wherein, the rotary motor is a double axis high-speed DC motor, the printing plate connects to a bottom end of the rotary motor through a flange coupling, and the clamped piece is arranged on a top end of the rotary motor.
A further configuration of the present disclosure, wherein the clamping assembly further comprises:
two clamping blocks, the clamping blocks are arranged oppositely on the first cylinder; a clamping permanent magnet, arranged in the clamping block; the clamped piece comprising: a clamped block, arranged above the rotary motor; a rotary permanent magnet, arranged in the clamped block. A further configuration of the present disclosure, wherein the multi-material photocuring 3D printer further comprises: two resin collection devices, the resin collection devices are arranged oppositely on the frame; wherein, the resin collection device comprises: a first connecting plate, arranged on the frame; a second cylinder, arranged on the first connecting plate; a second connecting plate, arranged on the second cylinder; a third cylinder, arranged on the second connecting plate; a first collection slot, arranged on the third cylinder; wherein, an extension direction of the third cylinder is perpendicular to an extension direction of the second cylinder.
A further configuration of the present disclosure, wherein the multi-material photocuring 3D printer further comprises:
two post-curing devices, the post-curing devices are arranged oppositely and located on a side of the resin collection device; wherein, the post-curing device comprises: a third connecting plate, arranged on the frame; a fourth cylinder, arranged on the third connecting plate; a fourth connecting plate, arranged on the fourth cylinder; a fifth cylinder, arranged on the fourth connecting plate; a post-curing slot, arranged on the fifth cylinder; a UV curing light-emitting diode, arranged on the post-curing slot; wherein, an extension direction of the fifth cylinder is perpendicular to an extension direction of the fourth cylinder.
A further configuration of the present disclosure, wherein the multi-material photocuring 3D printer further comprises:
a resin slot switching device, arranged on the frame; the resin slots are arranged on the resin slot switching device; wherein, the resin slot switching device comprises: a driving assembly, arranged on the frame; a leveling plate, arranged on the driving assembly; a base plate, arranged on the leveling plate; wherein the resin slots are arranged on the base plate at an interval; a plurality of first leveling assemblies, arranged on the leveling plate and connected to the base plate; wherein, the first leveling assembly comprises: a fifth connecting plate, connected to the base plate; a first bolt, inserted through the fifth connecting plate; a first spring, sleeved on the first bolt; a first screw block, arranged on the leveling plate, and threadedly connected with the first bolt.
A further configuration of the present disclosure, wherein the printing platform comprises:
a plurality of second adjusting assemblies, the plurality of second adjusting assemblies are arranged on the bracket, and connected with the printing platform; wherein, the second adjusting assembly comprises: a second bolt, penetrating through the printing platform; a second spring, sleeved on the second bolt; a second screw block, arranged on the frame and threadedly connected with the second bolt.
A further configuration of the present disclosure, wherein the lifting device comprises:
a first mounting dock, arranged on the printing platform; a first driving motor, arranged on the first mounting dock and connected with the bracket; the driving assembly comprises: a second mounting dock, arranged on the frame; a second driving motor, arranged on the second mounting dock and connected with the leveling plate.
According to a same inventive concept, the present disclosure further provides a printing method for the multi-material photocuring 3D printer, applied to the multi-material photocuring 3D printer stated above, wherein the method comprises:
adjusting a distance from the printing plane to the bottom surface of the resin slot, to make a focal point of the optical engine align with the bottom surface of the resin slot; wherein the resin slot has a resin material placed in, and the material in each of the resin slot is corresponding to a material set in a 3D model of the printed piece; controlling the lifting device to move the printing plane to a distance having a thickness of one slice layer from the bottom surface of the resin slot; controlling the optical engine project a projection pattern corresponding to the current layer, to complete printing the current layer; wherein, if there is any other material existing in the current layer, or a material of a next layer is inconsistent with the material of the current layer, then controlling the rotary motor to spin, so as to remove any residual resin liquid on the printed piece and the printing plane by a method of spinning and centrifugation.
A further configuration of the present disclosure, the method further comprises:
collecting the residual resin liquid after removing the residual resin liquid on the printing plane, when it is needed to switch to another material for printing.
A further configuration of the present disclosure, the method further comprises:
performing a post-curing process on a designated layer.
The present disclosure provides a multi-material photocuring 3D printer and a 3D printing method, wherein the multi-material photocuring 3D printer comprises: a frame; a printing platform, arranged on the frame; a lifting device, arranged on the printing platform; a rotary motor, arranged on the lifting device; a printing plate, arranged on the rotary motor; wherein a bottom surface of the printing plate is a printing plane; a plurality of resin slots, arranged on the frame and located below the printing plate; an optical engine, arranged on the frame and located below the printing plate. The present disclosure connects the printing plate with the rotary motor, after finishing printing with one material, it is possible to remove the residual liquid resin on the printed piece and the printing plane by a method of high-speed centrifugation, to avoid any contaminations to the printed piece, thereby ensuring the printed piece in multi-material having a high precision and a high resolution.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to describe the embodiments of the present disclosure or the technical solutions in the prior art more clearly, a plurality of drawings used in the description of the embodiments or the prior art will be briefly introduced hereafter. Obviously, the drawings in the following description are some embodiments of the present disclosure only, those of ordinary skills in the present art, without any creative work, may obtain other drawings based on the structure shown in these drawings.
FIG. 1 illustrates a schematic diagram on an overall structure of the multi-material photocuring 3D printer in the present disclosure.
FIG. 2 illustrates a schematic diagram on a structure of the printing platform and the second adjusting assembly in the present disclosure.
FIG. 3 illustrates a schematic diagram on a structure of the rotary motor and the locking device in the present disclosure.
FIG. 4 illustrates a schematic diagram on a structure of the clamping assembly in the present disclosure.
FIG. 5 illustrates a schematic diagram on a structure of the clamped piece in the present disclosure.
FIG. 6 illustrates a schematic diagram on a structure of the resin collection device and a structure of the post-curing device in the present disclosure.
FIG. 7 illustrates a schematic diagram on a structure of the resin slot and a structure of the resin slot switching device in the present disclosure.
FIG. 8 illustrates a schematic diagram on a structure of the optical engine and a structure of a third mounting dock in the present disclosure.
FIG. 9 illustrates a schematic flow chart on a printing method of the multi-material photocuring 3D printer in the present disclosure.
Numerals in the figures: 1 , frame; 2 , printing platform; 3 , lifting device; 31 , first mounting dock; 32 , first driving motor; 4 , rotary motor; 41 , flange coupling; 5 , printing plate; 6 , resin slot; 7 , optical engine; 71 , third mounting dock; 8 , locking device; 81 , bracket; 82 , first cylinder; 83 , clamping assembly; 831 , clamping block; 832 , clamping permanent magnet; 84 , clamped piece; 841 , clamped block; 842 , rotary permanent magnet; 9 , resin collection device; 91 , first connecting plate; 92 , second cylinder; 93 , second connecting plate; 94 , third cylinder; 95 , first collection slot; 10 , post-curing device; 101 , third connecting plate; 102 , fourth cylinder; 103 , fourth connecting plate; 104 , fifth cylinder; 105 , post-curing slot; 106 , ultraviolet curing light-emitting diode; 11 , resin slot switching device; 111 , driving assembly; 1111 , second mounting dock; 1112 , second driving motor; 112 , leveling plate; 113 , base plate; 114 , first leveling assembly; 1141 , fifth connecting plate; 1142 , first bolt; 1143 , first spring; 1144 , first screw block; 12 , second adjusting assembly; 121 , second bolt; 122 , second spring; 123 , second screw block.
DETAILED DESCRIPTION OF EMBODIMENTS
The present disclosure provides a multi-material photocuring 3D printer and a 3D printing method, being able to print multi-material onto a same unit, in order to make the purpose, technical solution and the advantages of the present disclosure clearer and more explicit, further detailed descriptions of the present disclosure are stated here, referencing to the attached drawings and some embodiments of the present disclosure. It should be understood that the detailed embodiments of the disclosure described here are used to explain the present disclosure only, instead of limiting the present disclosure.
The implementations and the scope of the patent application, wherein unless specific limitations on articles are applied in the text, âaâ and âtheâ may generally refer to a singular or a plural.
In addition, if there are descriptions related to âfirstâ, âsecondâ, and more in the embodiments of the present disclosure, the descriptions of âfirstâ, âsecondâ, and more are used for descriptive purposes only, instead of being understood as instructions or implications to its relative importance or as implicitly indications to a number of a technical feature indicated. Therefore, the features defined with âfirstâ and âsecondâ may explicitly or implicitly include at least one of the features. In addition, a plurality of technical solutions between various embodiments may be combined with each other, but they must be based on what can be achieved by an ordinary skilled in the art. When the combination of technical solutions is contradictory or impossible to achieve, it should be considered that such a combination of the technical solutions neither exists, nor falls within the scope of protection required by the present disclosure.
After a plurality of researches and studies, it has been found that, a technical core of a multi-material photocuring 3D printing technology lies in removing a residual liquid when switching a material. An existing method of removing the residual liquid is cleaning a cleaning slot with alcohol or a plurality of other organic solvents, performing a drying operation before printing with a second material. Such a method has a plurality of defects existing, first, a plurality of repeated cleaning may cause damaging a printed structure, and lowering a dimensional accuracy. Secondly, a material removal process thereof is complicated, time-costing and material-consuming, having a low efficiency. Finally, adding a cleaning process cannot be truly pollution-free, and there are still some residual organic solvents left on a surface of a printed piece, which, instead, causes a repeated introduction of a new pollution. In addition, there is another way to remove the residual liquids, which is removing the residual liquids on the surface of the printed piece directly by air blowing. Such a method cannot well remove the residual liquids on the surface of the printed piece either. Thus it can be seen that, the methods of removing the residual liquids when switching the materials, as mentioned above, will both reduce a printing accuracy and a resolution of the printed piece.
According to the technical problems mentioned above, the present disclosure provides a multi-material photocuring 3D printer and a printing method thereof. Wherein the 3D printer comprises: a frame; a printing platform, arranged on the frame; a lifting device, arranged on the printing platform; a rotary motor, arranged on the lifting device; a printing plate, arranged on the rotary motor; wherein a bottom surface of the printing plate is a printing plane; a plurality of resin slots, arranged on the frame and located below the printing plate; an optical engine, arranged on the frame and located below the printing plate. The present disclosure, wherein, by connecting the printing plate with the rotary motor, after finishing printing with one material, a residual liquid resin on the printed piece and the printing plane can be removed by a method of high-speed centrifugation, thereby prevents the printed piece from being contaminated and ensures a high precision and a high resolution of the printed piece with multi-material, having a great significance for an integrated molding of a flexible device and a multi-material soft driver.
Referencing to FIGS. 1 to 8 together, the present disclosure provides a preferred embodiment of the multi-material photocuring 3D printer.
Shown as FIG. 1 , the present disclosure provides a multi-material photocuring 3D printer, the multi-material photocuring 3D printer comprises: a frame 1 , a printing platform 2 , a lifting device 3 , a rotary motor 4 , a printing plate 5 , a plurality of resin slots 6 , and an optical engine 7 . Wherein the printing platform 2 is arranged on the frame 1 ; the lifting device 3 is arranged on the printing platform 2 ; the rotary motor 4 is arranged on the lifting device 3 ; the printing plate 5 is arranged on the rotary motor 4 ; wherein a bottom surface of the printing plate 5 is a printing plane; there are a plurality of resin slots 6 arranged, and arranged in intervals on the frame 1 while located below the printing plate 5 ; the optical engine 7 is arranged on the frame 1 and located below the printing plate 5 .
Specifically, the rotary motor 4 is a high-speed rotary motor, the printing plate 5 connects to the lifting device 3 through the rotary motor 4 , while the lifting device 3 is able to drive the printing plate 5 to move along a Z-axis direction, wherein the Z-axis direction refers to a direction of a Z-axis in a three-dimensional coordinate system. In addition, the resin slot 6 has a resin material stored inside, and a material in each of the resin slot 6 is corresponding to a material set by a 3D model of the printed piece.
When printing, first it is needed to adjust a position of each hardware and clarify each material parameter, specifically, adjusting the printing platform 2 and the resin slot 6 to a horizontal state, making a bottom surface of each resin slot 6 parallel to a printing plane of the printing plate 5 , before adjusting a distance from the printing plane to the bottom surface of the resin slot 6 , to ensure that a focal point of the optical engine 7 (an optical projection system) is aligned with the bottom surface of the resin slot 6 .
Secondly, performing a slicing process to the 3D model of the printed piece, and dividing each part of a different material into a picture corresponding to the material, wherein the pictures may be divided into two cases: one layer containing one material and one layer containing multiple materials. After confirming that the material in each resin slot 6 is corresponding to the material set by the 3D model, a plurality of printing parameters will be set. After the printing parameters are set, controlling the printing plane by the lifting device 3 move to a distance having a one-layer thickness from the bottom surface of the resin slot 6 , then the optical engine 7 projects a projection pattern corresponding to a current layer. In an embodiment, when printing a first layer, the printing plane is adjusted to a distance having a thickness of the first layer from the bottom surface of the resin slot 6 . When the printing plane rises, the resin in the resin slot 6 will fill in a gap between the resin slot 6 and the printing plane, while the optical engine 7 projects a pattern of the first layer in the 3D model and irradiates on a liquid resin, before performing a photocuring and molding, that completes printing the first layer. After finishing printing the first layer, the lifting device 3 lifts the printing plate 5 up for a certain distance (for example, lifting up a distance of 4 to 5 layers) before moving to a height of a next layer, to ensure that the resin can fill completely a thickness of the new layer. When the printing plate 5 is adjusted to a position of a second layer and the resin has filled a thickness of the second layer, the optical engine 7 projects a shape pattern of the second layer onto the resin, before finishing printing the second layer. By a plurality of repeated operations, it is able to print the model in a stacked form.
Wherein, if there is only one material in the current layer, and a material in a next layer is consistent with the material in the current layer, then controlling the lifting device 3 to raise the printing plane for a certain distance before moving to the position of the next layer. For example, if the materials of the first layer and the second layer are the same, then it is possible to print the next layer directly.
If the current layer has another material exist, or the material of the next layer is inconsistent with that of the current layer, then the rotary motor 4 is controlled to spin, in order to remove the residue resin liquid on the printed piece and the printing plane through a method of spinning and centrifugation. In an embodiment, the first layer has another material existing, or the material of the second layer to print is inconsistent with that of the first layer, then it is needed to clean the printed piece and the printing plane before performing printing. That is, when switching the material for printing is needed, it shall clean a previous liquid resin before printing with another resin material, specifically, after finishing printing with one resin material, the printing plate 5 is unplugged, since the printing plate 5 is connecting to the rotary motor 4 , thus under a high-speed spinning of the rotary motor 4 , it is possible to clean out the liquid resin on the printed piece and the printing plane in a method of spinning and centrifugation.
It can be seen that, the present disclosure connects the printing plate 5 with the rotary motor 4 , after finishing printing with one material, it is possible to remove the residual liquid resin on the printed piece and the printing plane by a method of a high-speed centrifugation, without using alcohol or any organic solvents. It is possible to avoid any residual organic solvents on the printed piece, thereby avoiding a repeated introduction of a new pollution, ensuring a resolution requirement of the printed piece, and also it is possible to avoid damages to a structure of the printed piece due to repeated cleaning, ensuring an accuracy requirement of the printed piece. In addition, the present disclosure removes the residual liquid resin in a method of spinning and centrifugation, having a simple process, also no organic solvent is required, which not only improves a cleaning efficiency, but also saves materials, thereby saving costs.
It should be noted that, when configuring a plurality of printing parameters, according to a viscosity of a printing liquid, a spinning speed of the printing platform 2 is configured to ensure that the material is able to be effectively removed. In addition, it is possible to summarize, by a plurality of experiments, the printing parameters required for each material, as well as the spinning speed and the time required to clean a residual liquid by spinning and centrifugation, and according to a property of the material, determining whether a post-curing is required. If necessary, a light intensity and a spacer layer shall be adjusted appropriately.
Referencing to FIG. 1 and FIG. 2 , in a further implementation of an embodiment, the multi-material photocuring 3D printer further comprises: a locking device 8 , the locking device 8 is arranged on the lifting device 3 ; the rotary motor 4 is arranged on the locking device 8 . Wherein, the printing plate 5 restores to an initial absolute position by the locking device 8 .
Specifically, a locking device 8 is further arranged between the rotary motor 4 and the lifting device 3 . After the rotary motor 4 drives the printing plate 5 and completes cleaning the residual liquid resin, the rotary motor 4 stops spinning. And the rotary motor 4 can be restored to the initial absolute position by the locking device 8 . Since the printing plate 5 connects to the rotary motor 4 , the printing plate 5 may also restore to an initial absolute position state, the initial absolute position of the rotary motor 4 is locked, and the printing plane is indirectly locked as well. Therefore, after the printing plane spins at a high speed to remove the residual resin, it is possible to always maintain the initial absolute position, thereby ensuring that the printed piece will not appear a misaligned state.
Referencing to FIG. 2 and FIG. 3 , in a further implementation of an embodiment, the locking device 8 comprises: a bracket 81 , a first cylinder 82 , a clamping assembly 83 , and a clamped piece 84 . Wherein, the first cylinder 82 is arranged on the bracket 81 ; the clamping assembly 83 is arranged on the first cylinder 82 ; the clamped piece 84 is arranged on the rotary motor 4 and located at a middle position of the clamping assembly 83 . Wherein, the rotary motor 4 is a double axis high-speed DC motor, the printing plate 5 connects to a bottom end of the rotary motor 4 through a flange coupling 41 , and the clamped piece 84 is arranged on a top end of the rotary motor 4 .
Specifically, the bracket 81 is arranged on the lifting device 3 , the clamping assembly 83 is arranged on the first cylinder 82 , and the clamped piece 84 is arranged on an upper end of the rotary motor 4 and located at a middle position of the clamping assembly 83 , while the printing plate 5 is arranged at a lower end of the rotary motor 4 . When the rotary motor 4 is in a spinning state, the clamping assembly 83 is also in an open state under an action of the first cylinder 82 , while the clamped piece 84 can spin freely. Similarly, the printing plane can also spin freely. Under a high-speed driving of the rotary motor 4 , the clamped piece 84 spins synchronously with the printing plane, to realize removing the residual resin. When the rotary motor 4 is in a locked state, the rotary motor 4 stops rotating, while the clamping assembly 83 is in a closed state under an action of the first cylinder 82 , the clamping assembly 83 clamps the clamped piece 84 , so as to restore the clamped piece 84 to an original absolute position thereof. At this time, since the clamped piece 84 and the printing plane both connect to the rotary motor 4 , thus the printing plane will also restore to an initial absolute position state.
Referencing to FIG. 3 and FIG. 4 , in a further implementation of an embodiment, the clamping assembly 83 comprises: a clamping block 831 and a clamping permanent magnet 832 , wherein two of the clamping block 831 are arranged, and arranged oppositely on the first cylinder 82 , and the clamping permanent magnet 832 is arranged in the clamping block 831 . In a plurality of embodiments, the first cylinder 82 is a double-slider cylinder, and the clamping blocks 831 are arranged on both sides of the first cylinder 82 respectively.
Furthermore, referencing to FIG. 5 , the clamped piece 84 comprises: a clamped block 841 and a rotary permanent magnet 842 , wherein the clamped block 841 is arranged above the rotary motor 4 , and the rotary permanent magnet 842 is arranged in the clamped block 841 .
Specifically, the clamping assembly 83 is a magnetic clamping assembly 83 . The clamping permanent magnet 832 and the rotary permanent magnet 842 can attract each other, after the rotary motor 4 is powered off, under an action of a magnetic force, a relative balance will be maintained, and such a balance state is the initial absolute position of the clamped piece 84 . Thus, after the rotary motor 4 stops spinning, the clamping assembly 83 is clamped tightly by the first cylinder 82 , so as to clamp the clamped piece 84 , and a lock of the initial absolute position of the clamped piece 84 will be achieved. It can be understood that, after the initial position of the clamped piece 84 is locked, the printing plate 5 will be indirectly locked. Therefore, after the printing plane of the printing plate 5 spinning at a high speed and removing the residual resin, it is possible to always maintain the initial absolute position, thus ensuring that the printed piece will not appear a misaligned state between layers.
It should be noted that, in som
CLAIMS
Claims ( 8 )
What is claimed is:
1. A multi-material photocuring 3D printer, comprising:
a frame;
a printing platform, arranged on the frame;
a lifting device, arranged on the printing platform;
a rotary motor, arranged on the lifting device;
a printing plate, arranged on the rotary motor, wherein a bottom surface of the printing plate is a printing plane, and wherein the rotary motor is configured to rotate the printing plate;
a locking device positioned proximate to the rotary motor, wherein the locking device is configured to contact the rotary motor to stop a rotation of the rotary motor, and wherein the locking device comprises:
a bracket;
a first cylinder, arranged on the bracket;
a clamping assembly, arranged on the first cylinder; and
a clamped piece, arranged on the rotary motor and located at a middle position of the clamping assembly;
wherein the rotary motor is a double axis high-speed DC motor, the printing plate connects to a bottom end of the rotary motor through a flange coupling, and the clamped piece is arranged on a top end of the rotary motor;
a plurality of resin slots, arranged on the frame and located below the printing plate; and
an optical engine, arranged on the frame and located below the printing plate.
2. The multi-material photocuring 3D printer according to claim 1 , wherein:
the locking device is arranged on the lifting device;
wherein the rotary motor is arranged on the locking device; and
wherein the locking device contacts the rotary motor to restore the printing plate to an initial absolute position.
3. The multi-material photocuring 3D printer according to claim 1 , wherein the clamping assembly comprises:
two clamping blocks, wherein the clamping blocks are arranged oppositely on the first cylinder;
a clamping permanent magnet, arranged in the clamping blocks;
wherein the clamped piece comprises:
a clamped block, arranged above the rotary motor; and
a rotary permanent magnet, arranged in the clamped block.
4. The multi-material photocuring 3D printer according to claim 1 , wherein the multi-material photocuring 3D printer further comprises:
two resin collection devices, wherein the resin collection devices are arranged oppositely on the frame, and wherein the resin collection devices comprises:
a first connecting plate, arranged on the frame;
a second cylinder, arranged on the first connecting plate;
a second connecting plate, arranged on the second cylinder;
a third cylinder, arranged on the second connecting plate;
a first collection slot, arranged on the third cylinder; and
an extension direction of the third cylinder is perpendicular to an extension direction of the second cylinder.
5. The multi-material photocuring 3D printer according to claim 4 , wherein the multi-material photocuring 3D printer further comprises:
two post-curing devices, wherein the post-curing devices are arranged oppositely and located on a side of the resin collection device and wherein the post-curing devices comprises:
a third connecting plate, arranged on the frame;
a fourth cylinder, arranged on the third connecting plate;
a fourth connecting plate, arranged on the fourth cylinder;
a fifth cylinder, arranged on the fourth connecting plate;
a post-curing slot, arranged on the fifth cylinder; and
a UV curing light-emitting diode, arranged on the post-curing slot;
wherein an extension direction of the fifth cylinder is perpendicular to an extension direction of the fourth cylinder.
6. The multi-material photocuring 3D printer according to claim 1 , wherein, the multi-material photocuring 3D printer further comprises:
a resin slot switching device, arranged on the frame, wherein the resin slots are arranged on the resin slot switching device, and wherein the resin slot switching device comprises:
a driving assembly, arranged on the frame;
a leveling plate, arranged on the driving assembly;
a base plate, arranged on the leveling plate, wherein the resin slots are arranged on the base plate at an interval;
a plurality of first leveling assemblies, arranged on the leveling plate and connected to the base plate, wherein the first leveling assembly comprises:
a fifth connecting plate, connected to the base plate;
a first bolt, inserted through the fifth connecting plate;
a first spring, sleeved on the first bolt; and
a first screw block, arranged on the leveling plate, and threadedly connected with the first bolt.
7. The multi-material photocuring 3D printer according to claim 6 , wherein the printing platform comprises:
a plurality of second adjusting assemblies, wherein the plurality of second adjusting assemblies are arranged on the bracket, and connected with the printing platform, wherein the second adjusting assembly comprises:
a second bolt, penetrating through the printing platform;
a second spring, sleeved on the second bolt; and
a second screw block, arranged on the frame and threadedly connected with the second bolt.
8. The multi-material photocuring 3D printer according to claim 6 , wherein the lifting device comprises:
a first mounting dock, arranged on the printing platform;
a first driving motor, arranged on the first mounting dock and connected with the bracket;
wherein the driving assembly comprises:
a second mounting dock, arranged on the frame; and
a second driving motor, arranged on the second mounting dock and connected with the leveling plate.
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Multi-material photocuring 3D printer and 3D printing method
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