CN111196033B - Rapid multi-material photocuring 3D printing device and method based on double-light-source initiation - Google Patents

Rapid multi-material photocuring 3D printing device and method based on double-light-source initiation Download PDF

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CN111196033B
CN111196033B CN202010032268.9A CN202010032268A CN111196033B CN 111196033 B CN111196033 B CN 111196033B CN 202010032268 A CN202010032268 A CN 202010032268A CN 111196033 B CN111196033 B CN 111196033B
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light
printing
waveband
emitting head
air
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CN111196033A (en
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李隆球
俞中委
邓兴泓
邵广斌
张广玉
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Harbin Institute of Technology
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Harbin Institute of Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
    • B29C64/129—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/264—Arrangements for irradiation
    • B29C64/277—Arrangements for irradiation using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED]
    • B29C64/282—Arrangements for irradiation using multiple radiation means, e.g. micromirrors or multiple light-emitting diodes [LED] of the same type, e.g. using different energy levels
    • 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
    • B29C64/364—Conditioning of environment
    • B29C64/371—Conditioning of environment using an environment other than air, e.g. inert gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • 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

Abstract

The invention relates to a 3D printing device and a method, in particular to a rapid multi-material photocuring 3D printing device and a rapid multi-material photocuring 3D printing method based on double light sources, which comprises a light source system, a projection system, a material pool device, a base device, an air breather and a shock insulation table, wherein the light source system is arranged on the shock insulation table; the invention provides a multi-material photocuring 3D printing device and method with high precision and high efficiency and capable of flexibly replacing a light source, which are suitable for researching simultaneous accurate 3D printing and forming of two photosensitive resin materials, and greatly improve the efficiency of multi-material photocuring 3D printing.

Description

Rapid multi-material photocuring 3D printing device and method based on double-light-source initiation
Technical Field
The invention relates to a 3D printing device and a method, in particular to a quick multi-material photocuring 3D printing device and a method based on double-light-source initiation.
Background
The photocuring 3D printing technology is limited by the performance of a single printing material, and is difficult to fully exert the advantages of high precision, high efficiency, rapid forming of a complex three-dimensional structure and the like in practical application. Therefore, intensive research needs to be carried out on the multi-material photocuring 3D printing technology to expand the application range thereof. At present, the multi-material photocuring 3D printing technology includes multi-material multi-station printing and multi-material single-station printing, wherein the multi-material multi-station printing is in an absolute mainstream status, and includes multi-material pool station rotation switching and translation switching, so as to realize simultaneous printing of multiple materials in a single part printing process; and the multi-material single-station printing only has one material pool, and multiple materials are pumped out and pumped in by using a liquid pump in the single part printing process, so that the multi-material printing is realized. Although the existing multi-material photocuring printing technology is mature, the technical methods have the defects in principle, which are mainly shown in the following steps: the multi-material multi-station printing and the multi-material single-station printing method based on the liquid pump have extremely low efficiency, and the advantage of high efficiency of the photocuring 3D printing technology is lost; the multi-material multi-station printing needs to be repeatedly switched, and a cleaning station and a drying station need to be added in the switching process of the multiple material stations, so that inherent mechanical motion errors can be introduced, and the high-precision advantage of the photocuring 3D printing technology is lost to a certain extent; the multi-material photocuring 3D printing in the prior art is extremely low in efficiency and large in precision loss.
Disclosure of Invention
The invention aims to provide a quick multi-material photocuring 3D printing device and method based on double-light-source initiation, and the device and method can solve the problems of extremely low multi-material photocuring 3D printing efficiency and large precision loss in the prior art.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a quick many materials photocuring 3D printing device based on two light sources cause, includes light source system, projection system, material pond device, basement device, ventilation unit and shock insulation platform, light source system sets up on shock insulation platform, and projection system includes ray apparatus and outer light path part, and the equal fixed connection of ray apparatus and outer light path part is on shock insulation platform, and the income light mouth of ray apparatus sets up at light source system light path output end, and material pond device includes air chamber, oxygen permeation membrane and material pond, and air chamber fixed connection has opened air inlet and gas outlet respectively in the below of material pond, and the oxygen permeation membrane centre gripping is sealed fixed between air chamber and material pond, and basement device sets up in the top of material pond, and ventilation unit and gas chamber are connected.
As further optimization of the technical scheme, the rapid multi-material photocuring 3D printing device based on double-light-source initiation comprises a controller, two light-emitting heads and a spectroscope, wherein the controller, the two light-emitting heads and the spectroscope are fixedly connected to a shock insulation table, the two light-emitting heads are oppositely arranged at 90 degrees, the two light-emitting heads are connected to the controller through leads, the controller is connected with a control switch, and the spectroscope is arranged at an opposite intersection point in front of the two light-emitting heads and is arranged at 45 degrees with the two light-emitting heads.
As a further optimization of the technical scheme, the two light-emitting heads are respectively a low-waveband light-emitting head and a high-waveband light-emitting head, the low-waveband light-emitting head and the high-waveband light-emitting head are opposite at 90 degrees and are arranged at the same height, the spectroscope is arranged at 45 degrees with the low-waveband light-emitting head and the high-waveband light-emitting head and have the same center height, and the low-waveband light-emitting head and the high-waveband light-emitting head are respectively positioned at two sides of the spectroscope.
As further optimization of the technical scheme, the invention relates to a rapid multi-material photocuring 3D printing device based on double-light-source initiation, wherein an outer light path part comprises a lens, a diaphragm and a reflector, the lens, the diaphragm and the reflector are fixedly connected to a seismic isolation platform, a light inlet of an optical machine is arranged in the direction opposite to a low-waveband light emitting head, the lens is arranged in the direction opposite to a light outlet of the optical machine, the diaphragm is arranged in the direction opposite to the lens, the reflector is arranged in the direction opposite to the diaphragm at an angle of 45 degrees, relative distances between the optical machine, the lens, the diaphragm and the reflector are obtained by calculation according to the projection size of the optical machine, the focal length of the lens and the numerical aperture parameter of the diaphragm, and the central heights are consistent.
As a further optimization of the technical scheme, the rapid multi-material photocuring 3D printing device based on double-light-source initiation further comprises a rotary inclined table, a material pool adapter plate, a support connecting block and a rack supporting rod, wherein the material pool is fixedly connected onto the rotary inclined table, the rotary inclined table is fixedly connected onto the material pool adapter plate, the material pool adapter plate is fixedly connected onto the support connecting block, the support connecting block is connected onto the rack supporting rod, and the rack supporting rod is fixedly connected onto a seismic isolation table.
As a further optimization of the technical scheme, the invention relates to a rapid multi-material photocuring 3D printing device based on dual-light-source initiation, wherein the substrate device comprises a printing substrate, a rotary tilting table, a substrate adapter plate, a Z-direction displacement table, a displacement table adapter plate and a right-angle fixed block, the printing substrate is fixedly connected to the rotary tilting table, the rotary tilting table is fixedly connected to the substrate adapter plate, the substrate adapter plate is fixedly connected to the Z-direction displacement table, the Z-direction displacement table is fixedly connected to the displacement table adapter plate, the displacement table adapter plate is fixedly connected to the right-angle fixed block, and the right-angle fixed block is fixedly connected to a seismic isolation table.
As further optimization of the technical scheme, the rapid multi-material photocuring 3D printing device based on double-light-source initiation comprises an oxygen cylinder, a nitrogen cylinder, a three-way electric control air valve and an air pipe, wherein one end of the nitrogen cylinder is hermetically connected with an air inlet of an air chamber, the other end of the nitrogen cylinder is hermetically connected with an output port of the three-way electric control air valve, and air outlets of the nitrogen cylinder and the oxygen cylinder are hermetically connected with two input ports of the three-way electric control air valve through the air pipe; be provided with oxygen intake pipe, nitrogen gas intake pipe and outlet duct on the automatically controlled pneumatic valve of tee bend, the one end and the oxygen cylinder gas outlet sealing connection of oxygen intake pipe, the other end and the automatically controlled pneumatic valve of tee bend input port sealing connection of oxygen intake pipe, the one end and the nitrogen cylinder gas outlet sealing connection of nitrogen gas intake pipe, the other end and the automatically controlled pneumatic valve of tee bend another input port sealing connection of nitrogen gas intake pipe, the one end and the automatically controlled pneumatic valve delivery outlet sealing connection of tee bend of outlet duct, the other end and the air chamber air inlet sealing connection of outlet duct, the on-off switch of two input ports of the automatically controlled pneumatic valve control of tee bend.
As a further optimization of the technical scheme, the rapid multi-material photocuring 3D printing device based on double-light-source initiation is characterized in that the air chamber comprises an air chamber main body and a quartz glass sheet, the quartz glass sheet is bonded on the upper outer ring of the air chamber main body and sealed and is opposite to the center of the lower reflector, the material pool comprises a material pool main body and a sealing ring, the sealing ring is installed in a clamping groove of the material pool main body, an oxygen permeable membrane covers the sealing ring, and the air chamber is fixedly connected to the material pool main body.
A fast multi-material photocuring 3D printing method based on double-light-source initiation comprises the following steps:
the method comprises the following steps: establishing a three-dimensional model of a target multi-material printing part, and carrying out layered slicing processing to obtain layered slice image files of two materials;
step two: uniformly mixing two photosensitive resin materials with different photosensitive wave band heights by a magnetic stirrer, and filling the materials into the material pool; the two photosensitive resin materials with different photosensitive wave bands are positioned at 200nm-700nm, respectively correspond to the two light-emitting heads, and are not superposed with each other;
step three: controlling the sequential projection exposure of the layered slice images of the two materials according to the requirements of the target multi-material printing part; when the low-waveband photosensitive resin is printed, the controller controls the low-waveband light-emitting head to be turned on, and the high-waveband light-emitting head to be turned off; when the high-waveband photosensitive resin is printed, the controller controls the low-waveband light emitting head to be closed, and the high-waveband light emitting head is opened.
As a further optimization of the technical scheme, the two photosensitive resin materials are respectively a radical photosensitive resin material and a cationic photosensitive resin material.
The quick multi-material photocuring 3D printing device and method based on double-light-source initiation have the beneficial effects that:
the invention relates to a quick multi-material photocuring 3D printing device and method based on double light sources, which can effectively solve the problems of extremely low multi-material photocuring 3D printing efficiency and large precision loss in the prior art; the invention provides a multi-material photocuring 3D printing device and method with high precision and high efficiency and capable of flexibly replacing a light source, which are suitable for researching simultaneous accurate 3D printing and forming of two photosensitive resin materials, and greatly improve the efficiency of multi-material photocuring 3D printing.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and "upright", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, directly or indirectly connected through an intermediate medium, and may be a communication between two members. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present invention, the meaning of "a plurality", and "a plurality" is two or more unless otherwise specified.
FIG. 1 is a schematic structural diagram of the whole fast multi-material photocuring 3D printing device based on dual-light-source initiation;
FIG. 2 is a schematic diagram of a light source system according to the present invention;
FIG. 3 is a schematic structural view of the pond apparatus of the present invention;
FIG. 4 is a schematic structural view of the aerator of this invention;
FIG. 5 is a schematic diagram of the dual light source initiated multi-material photocuring 3D printing process of the present invention;
fig. 6 is a schematic illustration of the present invention showing the simultaneous rapid printing of two materials.
In the figure: a vibration isolation table 1; a controller 2; a light emitting head 3; a low-band light emitting head 3-1; 3-2 parts of a high-waveband light-emitting head; a spectroscope 4; an optical machine 5; a lens 6; a diaphragm 7; a mirror 8; an air chamber 9; a gas cell main body 9-1; 9-2 parts of quartz glass sheets; an oxygen permeable membrane 10; a material tank 11; a material tank main body 11-1; a seal ring 11-2; a print substrate 12; a rotary tilting table 13; a substrate interposer 14; a Z-direction displacement stage 15; a displacement stage adapter plate 16; a right-angle fixing block 17; an oxygen cylinder 18; a nitrogen gas cylinder 19; a three-way electric control air valve 20; an air tube 21; an oxygen inlet pipe 21-1; a nitrogen inlet pipe 21-2; an air outlet pipe 21-3; a rotary tilting table 22; a material pool adapter plate 23; a bracket connecting block 24; a rack support bar 25; a printed radical type photosensitive resin 26; printed cationic photosensitive resin 27; an oxygen-inhibiting region 28; a radical type photosensitive resin oxygen inhibition region 28-1; radical type photosensitive resin and cationic type photosensitive resin oxygen inhibition area 28-2; an air chamber inner chamber 29; a cationic photosensitive resin projection area 30; the radical type photosensitive resin projection area 31.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
the embodiment is described below with reference to fig. 1-6, and a rapid multi-material photocuring 3D printing device based on dual-light-source initiation comprises a light source system, a projection system, a material pool device, a base device, an air breather and a vibration isolation table 1, wherein the light source system is arranged on the vibration isolation table 1, the projection system comprises an optical machine 5 and an outer light path part, the optical machine 5 and the outer light path part are both fixedly connected to the vibration isolation table 1, a light inlet of the optical machine 5 is arranged at a light path output end of the light source system, the material pool device comprises an air chamber 9, an oxygen permeable membrane 10 and a material pool 11, the air chamber 9 is fixedly connected below the material pool 11, air inlets and air outlets are respectively arranged at two sides of the air chamber 9, the oxygen permeable membrane 10 is clamped between the air chamber 9 and the material pool 11 and is sealed and fixed, the base device is arranged above the material pool 11, and the air breather is connected with the air chamber 9; the problems of extremely low multi-material photocuring 3D printing efficiency and high precision loss in the prior art can be effectively solved; the invention provides a multi-material photocuring 3D printing device and method with high precision and high efficiency and capable of flexibly replacing a light source, which are suitable for researching simultaneous accurate 3D printing and forming of two photosensitive resin materials, and greatly improve the efficiency of multi-material photocuring 3D printing.
The second embodiment is as follows:
the following describes the embodiment with reference to fig. 1 to 6, and the embodiment further describes the first embodiment, the light source system includes a controller 2, a light emitting head 3 and a spectroscope 4, the controller 2, the light emitting head 3 and the spectroscope 4 are all fixedly connected to a vibration isolation table 1, the light emitting heads 3 are provided with two, the two light emitting heads 3 are oppositely arranged at 90 degrees, the two light emitting heads 3 are all connected to the controller 2 through wires, the controller 2 is connected to a control switch, and the spectroscope 4 is arranged at an opposite intersection point in front of the two light emitting heads 3 and is arranged at 45 degrees with the two light emitting heads 3.
The third concrete implementation mode:
this embodiment will be described below with reference to fig. 1 to 6, and this embodiment will further describe embodiment two, the two light-emitting heads 3 are respectively a low-waveband light-emitting head 3-1 and a high-waveband light-emitting head 3-2, the low-waveband light-emitting head 3-1 and the high-waveband light-emitting head 3-2 are opposite at 90 degrees and are arranged at the same height, the spectroscope 4 is arranged at 45 degrees with the low-waveband light-emitting head 3-1 and the high-waveband light-emitting head 3-2 and has the same central height, the low-waveband light-emitting head 3-1 and the high-waveband light-emitting head 3-2 are respectively positioned at two sides of the spectroscope 4, so that the low-waveband light-emitting head 3-1 outputs light which is transmitted by the spectroscope 4, the light path is superposed with the light path of the output light of the high-waveband light-emitting head 3-2 after being emitted by the spectroscope 4, and the superposed light path is over against the light inlet of the light-entering machine 5.
The fourth concrete implementation mode:
the following describes the present embodiment with reference to fig. 1 to 6, and the third embodiment is further described in the present embodiment, where the external optical path portion includes a lens 6, a diaphragm 7, and a reflector 8, the lens 6, the diaphragm 7, and the reflector 8 are all fixedly connected to the vibration isolation table 1, the light entrance of the optical machine 5 is arranged in the direction opposite to the low-band light emitting head 3-1, the lens 6 is arranged in the direction opposite to the light exit of the optical machine 5, the diaphragm 7 is arranged in the direction opposite to the lens 6, the reflector 8 is arranged in the direction opposite to the diaphragm 7 at an angle of 45 °, and the relative distances between the optical machine 5, the lens 6, the diaphragm 7, and the reflector 8 are calculated according to the projection size of the optical machine 5, the focal length of the lens 6, and the numerical aperture parameter of the diaphragm 7, and the central heights are the same.
The fifth concrete implementation mode:
the following describes the present embodiment with reference to fig. 1 to 6, which further describes the first embodiment, the material tank device further includes a rotary tilting table 22, a material tank adapter plate 23, a support connecting block 24 and a rack supporting rod 25, the material tank 11 is fixedly connected to the rotary tilting table 22 for leveling, the rotary tilting table 22 is fixedly connected to the material tank adapter plate 23, the material tank adapter plate 23 is fixedly connected to the support connecting block 24, the support connecting block 24 is connected to the rack supporting rod 25 for height adjustment, the rack supporting rod 25 is fixedly connected to the vibration isolation table 1, the material tank 11 is fixed to the rotary tilting table 22 through a threaded connection, and the three-point leveling mode is adopted to ensure that the bottom surface of the material tank 11 is horizontal.
The sixth specific implementation mode:
this embodiment will be described with reference to fig. 1 to 6, which further illustrate the first embodiment, the base device comprises a printing base 12, a rotary inclined table 13, a base adapter plate 14, a Z-direction displacement table 15, a displacement table adapter plate 16 and a right angle fixing block 17, wherein the printing base 12 is fixedly connected on the rotary inclined table 13 and is convenient to level, the rotary inclined table 13 is fixedly connected on the base adapter plate 14, the base adapter plate 14 is fixedly connected on the Z-direction displacement table 15, the Z-direction displacement table 15 is fixedly connected on the displacement table adapter plate 16 and is convenient to adjust the height, the displacement table adapter plate 16 is fixedly connected on the right angle fixing block 17, the right angle fixing block 17 is fixedly connected on the vibration isolation table 1, the printing substrate 12 is fixed on the rotary inclined table 13 through threaded connection, and the bottom surface of the printing substrate 12 is ensured to be horizontal by adopting a three-point leveling mode.
The seventh embodiment:
the following describes the present embodiment with reference to fig. 1 to 6, and the present embodiment further describes the first embodiment, where the ventilation device includes an oxygen cylinder 18, a nitrogen cylinder 19, a three-way electric control gas valve 20 and a gas pipe 21, one end of the nitrogen cylinder 19 is hermetically connected to the gas inlet of the gas chamber 9, the other end of the nitrogen cylinder 19 is hermetically connected to the output port of the three-way electric control gas valve 20, and the gas outlets of the nitrogen cylinder 19 and the oxygen cylinder 18 are hermetically connected to two input ports of the three-way electric control gas valve 20 through the gas pipe 21; an oxygen inlet pipe 21-1, a nitrogen inlet pipe 21-2 and an air outlet pipe 21-3 are arranged on the three-way electric control air valve 20, one end of the oxygen inlet pipe 21-1 is hermetically connected with an air outlet of an oxygen bottle 18, the other end of the oxygen inlet pipe 21-1 is hermetically connected with one input port of the three-way electric control air valve 20, one end of the nitrogen inlet pipe 21-2 is hermetically connected with an air outlet of a nitrogen bottle 19, the other end of the nitrogen inlet pipe 21-2 is hermetically connected with the other input port of the three-way electric control air valve 20, one end of the air outlet pipe 21-3 is hermetically connected with an output port of the three-way electric control air valve 20, the other end of the air outlet pipe 21-3 is hermetically connected with an air inlet of the air chamber 9, and the three-way electric control air valve 20 controls the on-off switching of the two input ports.
The specific implementation mode is eight:
the following describes the present embodiment with reference to fig. 1 to 6, and the present embodiment further describes the first to seventh embodiments, where the air chamber 9 includes an air chamber main body 9-1 and a quartz glass sheet 9-2, the quartz glass sheet 9-2 is adhered to the upper and outer rings of the air chamber main body 9-1 and sealed, and is aligned with the center of the lower reflector 8, the material cell 11 includes a material cell main body 11-1 and a sealing ring 11-2, the sealing ring 11-2 is installed in a clamping groove of the material cell main body 11-1, the oxygen permeable membrane 10 is covered on the sealing ring 11-2, the air chamber 9 is fixedly connected to the material cell main body 11-1, and the sealing ring 11-2 is compressed by screwing a screw diagonally to flatten the oxygen permeable membrane 10, and ensure the sealing performance.
A fast multi-material photocuring 3D printing method based on double-light-source initiation comprises the following steps:
the method comprises the following steps: establishing a three-dimensional model of a target multi-material printing part, and carrying out layered slicing processing to obtain layered slice image files of two materials;
step two: uniformly mixing two photosensitive resin materials with different photosensitive wave band heights by a magnetic stirrer, and filling the materials into the material pool 11; the two photosensitive resin materials with different photosensitive wave bands are positioned at 200nm-700nm, respectively correspond to the two light-emitting heads 3, and are not overlapped with each other;
step three: as shown in fig. 5, the sequential projection exposure of the layered slice images of the two materials is controlled according to the requirements of the target multi-material printed part; when the low-waveband photosensitive resin is printed, the controller 2 controls the low-waveband light-emitting head 3-1 to be turned on, and the high-waveband light-emitting head 3-2 to be turned off; when the high-waveband photosensitive resin is printed, the controller 2 controls the low-waveband light-emitting head 3-1 to be turned off, and the high-waveband light-emitting head 3-2 to be turned on;
the two photosensitive resin materials are respectively a free radical type photosensitive resin material and a cationic type photosensitive resin material;
the initiation process of the free radical type photosensitive resin material does not influence the cationic type photosensitive resin material; the initiating process of the cationic photosensitive resin material may simultaneously initiate the reaction of the radical photosensitive resin material;
the free radical type photosensitive resin material can be subjected to high-degree oxygen inhibition effect in polymerization to generate an oxygen inhibition effect; the cationic photosensitive resin material is polymerized to generate a low oxygen inhibition effect;
when the cationic photosensitive resin material is printed, the three-way electric control air valve 20 controls the connection input end of the nitrogen air inlet pipe 21-2 to be closed, the connection input end of the oxygen air inlet pipe 21-1 to be opened, the free radical photosensitive resin material cannot be printed due to inhibition of oxygen inhibition effect under a certain depth condition, the cationic photosensitive resin material can be printed due to small influence of oxygen inhibition, and the cationic photosensitive resin material is ensured to react independently; when the free radical type photosensitive resin material is printed, the three-way electric control air valve 20 controls the connection input end of the nitrogen air inlet pipe 21-2 to be opened first, the connection input end of the oxygen air inlet pipe 21-1 to be closed, the oxygen concentration in the air chamber 9 is reduced, then the connection input end of the nitrogen air inlet pipe 21-2 is closed, the connection input end of the oxygen air inlet pipe 21-1 is opened, the action depth of the oxygen inhibition effect is controlled, the free radical type photosensitive resin material is guaranteed to be independently printed at the same depth, and accurate multi-material printing is achieved; the oxygen inhibition effect action area has the effect of a curing dead zone, and the continuous liquid level rapid printing can be realized;
further, as shown in fig. 6, for 3D printing of an inner-outer double-layer material structure such as an optical fiber, the controller 2 controls the low-band light emitting head 3-1 and the high-band light emitting head 3-2 to be simultaneously turned on, and performs simultaneous projection printing of an inner layer material and an outer layer material; the three-way electric control air valve 20 controls the connection input end of the nitrogen inlet pipe 21-2 to be closed, and the connection input end of the oxygen inlet pipe 21-1 to be opened, so that a certain oxygen inhibition effect is generated, a curing dead zone with a certain depth is generated, and the rapid molding of the continuous liquid level is realized; the depth of the oxygen inhibition area of the cationic photosensitive resin material is smaller, and printing is started from the lower depth; the depth of the oxygen inhibition area of the free radical type photosensitive resin material is larger, and printing is started from the higher depth; the two photosensitive resin materials are independently printed at different depth layers at the same time, so that the two materials are quickly printed at the same time by one-time projection; the controller 2 controls the luminous intensity of the luminous head 3 and adjusts the depth of projection printing; the three-way electric control gas valve 20 controls the concentration of the introduced oxygen and adjusts the depth of the oxygen inhibition area.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the present invention and which may be made by those skilled in the art are also within the scope of the present invention.

Claims (6)

1. The utility model provides a quick many materials photocuring 3D printing device based on two light sources initiation, includes light source system, projection system, material pond device, base device, ventilation unit and shock insulation platform (1), its characterized in that: the light source system is arranged on the shock insulation platform (1), the projection system comprises an optical machine (5) and an outer light path part, the optical machine (5) and the outer light path part are fixedly connected to the shock insulation platform (1), a light inlet of the optical machine (5) is arranged at the light path output end of the light source system, the material pool device comprises an air chamber (9), an oxygen permeable membrane (10) and a material pool (11), the air chamber (9) is fixedly connected below the material pool (11), an air inlet and an air outlet are respectively arranged on two sides of the air chamber (9), the oxygen permeable membrane (10) is clamped between the air chamber (9) and the material pool (11) and is sealed and fixed, the substrate device is arranged above the material pool (11), and the ventilation device is connected with the air chamber (9);
the light source system comprises a controller (2), two light emitting heads (3) and a spectroscope (4), wherein the controller (2), the two light emitting heads (3) and the spectroscope (4) are fixedly connected to a shock insulation platform (1), the two light emitting heads (3) are arranged in a 90-degree opposite mode, the two light emitting heads (3) are connected to the controller (2) through leads, the controller (2) is connected with a control switch, and the spectroscope (4) is arranged at a relative intersection point in front of the two light emitting heads (3) and arranged at an angle of 45 degrees with the two light emitting heads (3);
the two light-emitting heads (3) are respectively a low-waveband light-emitting head (3-1) and a high-waveband light-emitting head (3-2), the low-waveband light-emitting head (3-1) and the high-waveband light-emitting head (3-2) are opposite at 90 degrees and are arranged at the same height, the spectroscope (4) is arranged at 45 degrees with the low-waveband light-emitting head (3-1) and the high-waveband light-emitting head (3-2) and has the same central height, and the low-waveband light-emitting head (3-1) and the high-waveband light-emitting head (3-2) are respectively positioned at two sides of the spectroscope (4);
the outer light path part comprises a lens (6), a diaphragm (7) and a reflector (8), the lens (6), the diaphragm (7) and the reflector (8) are fixedly connected to the shock insulation platform (1), a light inlet of the optical machine (5) is arranged in the direction opposite to the low-waveband light-emitting head (3-1), the lens (6) is arranged in the direction opposite to the light outlet of the optical machine (5), the diaphragm (7) is arranged in the direction opposite to the lens (6), the reflector (8) is arranged in the direction opposite to the diaphragm (7) at an angle of 45 degrees, the relative distances among the optical machine (5), the lens (6), the diaphragm (7) and the reflector (8) are obtained through calculation according to the projection size of the optical machine (5), the focal length of the lens (6) and the numerical aperture parameter of the diaphragm (7), and the center heights are consistent;
the material pool device further comprises a rotary inclined table (22), a material pool adapter plate (23), a support connecting block (24) and a rack supporting rod (25), the material pool (11) is fixedly connected onto the rotary inclined table (22), the rotary inclined table (22) is fixedly connected onto the material pool adapter plate (23), the material pool adapter plate (23) is fixedly connected onto the support connecting block (24), the support connecting block (24) is connected onto the rack supporting rod (25), and the rack supporting rod (25) is fixedly connected onto the shock insulation table (1).
2. The dual-light-source-initiated-based rapid multi-material photocuring 3D printing device according to claim 1, wherein: the basement device is including printing basement (12), rotatory slope platform (13), basement keysets (14), Z displacement platform (15), displacement platform keysets (16) and right angle fixed block (17), print basement (12) fixed connection on rotatory slope platform (13), rotatory slope platform (13) fixed connection is on basement keysets (14), basement keysets (14) fixed connection is on Z displacement platform (15), Z displacement platform keysets (15) fixed connection is on displacement platform keysets (16), displacement platform keysets (16) fixed connection is on right angle fixed block (17), right angle fixed block (17) fixed connection is on shock insulation platform (1).
3. The dual-light-source-initiated-based rapid multi-material photocuring 3D printing device according to claim 1, wherein: the air breather comprises an oxygen cylinder (18), a nitrogen cylinder (19), a three-way electric control air valve (20) and an air pipe (21), one end of the nitrogen cylinder (19) is hermetically connected with an air inlet of the air chamber (9), the other end of the nitrogen cylinder is hermetically connected with an output port of the three-way electric control air valve (20), and air outlets of the nitrogen cylinder (19) and the oxygen cylinder (18) are hermetically connected with two input ports of the three-way electric control air valve (20) through the air pipe (21); an oxygen inlet pipe (21-1) is arranged on the three-way electric control air valve (20), one end of the oxygen inlet pipe (21-1) is hermetically connected with an air outlet of the oxygen cylinder (18), the other end of the oxygen inlet pipe (21-1) is hermetically connected with one input port of the three-way electric control air valve (20), one end of the nitrogen inlet pipe (21-2) is hermetically connected with an air outlet of the nitrogen cylinder (19), the other end of the nitrogen inlet pipe (21-2) is hermetically connected with the other input port of the three-way electric control air valve (20), one end of the air outlet pipe (21-3) is hermetically connected with an output port of the three-way electric control air valve (20), the other end of the air outlet pipe (21-3) is hermetically connected with an air inlet of the air chamber (9), and the three-way electric control air valve (20) controls the on-off switching of the two input ports.
4. A dual light source initiated fast multi-material photo-curing 3D printing device according to any of claims 1 to 3, wherein: the air chamber (9) comprises an air chamber main body (9-1) and a quartz glass sheet (9-2), the quartz glass sheet (9-2) is bonded on the upper outer ring of the air chamber main body (9-1) and sealed, and is right opposite to the center of the lower reflector (8), the material tank (11) comprises a material tank main body (11-1) and a sealing ring (11-2), the sealing ring (11-2) is installed in a clamping groove of the material tank main body (11-1), an oxygen permeable membrane (10) covers the sealing ring (11-2), and the air chamber (9) is fixedly connected onto the material tank main body (11-1).
5. The method for 3D printing using the dual light source initiation-based fast multi-material photocuring 3D printing device of claim 1, wherein: the method comprises the following steps:
the method comprises the following steps: establishing a three-dimensional model of a target multi-material printing part, and carrying out layered slicing processing to obtain layered slice image files of two materials;
step two: uniformly mixing two photosensitive resin materials with different photosensitive wave band heights by a magnetic stirrer, and filling the materials into the material pool (11); the two photosensitive resin materials with different photosensitive wave band heights are positioned at 200nm-700nm and respectively correspond to the two light-emitting wave bands of the two light-emitting heads (3), and the two light-emitting wave bands are not overlapped with each other;
step three: controlling the sequential projection exposure of the layered slice images of the two materials according to the requirements of the target multi-material printing part; when the low-waveband photosensitive resin is printed, the controller (2) controls the low-waveband light-emitting head (3-1) to be turned on, and the high-waveband light-emitting head (3-2) is turned off; when the high-waveband photosensitive resin is printed, the controller (2) controls the low-waveband light-emitting head (3-1) to be turned off, and the high-waveband light-emitting head (3-2) is turned on.
6. The 3D printing method according to claim 5, characterized in that: the two photosensitive resin materials with different photosensitive wave band heights are respectively a free radical type photosensitive resin material and a cationic type photosensitive resin material.
CN202010032268.9A 2020-01-13 2020-01-13 Rapid multi-material photocuring 3D printing device and method based on double-light-source initiation Active CN111196033B (en)

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