CN110978500B - 3D printing method and device based on thermal initiator addition - Google Patents

3D printing method and device based on thermal initiator addition Download PDF

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Publication number
CN110978500B
CN110978500B CN201911357452.4A CN201911357452A CN110978500B CN 110978500 B CN110978500 B CN 110978500B CN 201911357452 A CN201911357452 A CN 201911357452A CN 110978500 B CN110978500 B CN 110978500B
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China
Prior art keywords
thermal initiator
printing
printing paste
reactant
printing material
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CN201911357452.4A
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Chinese (zh)
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CN110978500A (en
Inventor
马建立
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Shenzhen Sunshine Laser & Electronics Technology Co ltd
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Shenzhen Sunshine Laser & Electronics Technology Co ltd
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/001—Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material
    • 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
    • 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
    • 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
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • 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
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing

Abstract

The embodiment of the application discloses a 3D printing method and device based on thermal initiator addition. The method comprises the following steps: maintaining the printing paste at a set temperature; injecting a thermal initiator below the liquid level of the printing paste according to a set track, so that the thermal initiator reacts with a part of the printing paste to form a cured reactant with a set shape; the viscosity of the printing paste meets the following requirements: during the injection of the thermal initiator, the previously formed curing reactant stays in place and shape remains intact; the density of the printing paste satisfies the following conditions: the curing reactant may be suspended in the printing paste. The device is used for realizing the method. The size precision of the product can be improved, and the product with higher quality can be obtained through printing.

Description

3D printing method and device based on thermal initiator addition
Technical Field
The application relates to the technical field of 3D printing of ceramic materials, in particular to a 3D printing method and device based on addition of a thermal initiator.
Background
In recent years, 3D printing technology has been widely used in various fields. In a conventional 3D printing method, a liquid slurry is cured by light curing, so as to obtain a product. Specifically, a photoinitiator is doped into organic matters of the liquid slurry to promote organic molecules to polymerize, and the part receiving ultraviolet illumination is converted into a solid state. The forming mode needs to support the printing slurry, namely the liquid slurry, and the dimensional accuracy of the product is low.
The above background disclosure is only for the purpose of assisting in understanding the inventive concepts and technical solutions of the present application and does not necessarily pertain to the prior art of the present application, and should not be used to assess the novelty and inventive step of the present application in the absence of explicit evidence to suggest that such matter has been disclosed at the filing date of the present application.
Disclosure of Invention
The application provides a 3D printing method and device based on thermal initiator addition, which can improve the size precision of products and obtain higher-quality products through printing.
In a first aspect, the present application provides a method of 3D printing based on the addition of a thermal initiator, comprising:
maintaining the printing paste at a set temperature;
injecting a thermal initiator below the liquid level of the printing paste according to a set track, so that the thermal initiator reacts with a part of the printing paste to form a cured reactant with a set shape;
the viscosity of the printing paste meets the following requirements: during the injection of the thermal initiator, the previously formed curing reactant stays in place and shape remains intact;
the density of the printing paste satisfies the following conditions: the curing reactant may be suspended in the printing paste.
In some preferred embodiments, the main component of the printing paste is a resin.
In some preferred embodiments, the main components of the printing paste are resin and ceramic powder.
In some preferred embodiments, the method further comprises: varying the temperature, and thereby varying the rate of injection of the thermal initiator.
In a second aspect, the present application provides a 3D printing device based on the addition of a thermal initiator for implementing the above method.
In some preferred embodiments, the device comprises a pulp barrel, an injection mechanism and a three-dimensional motion mechanism;
the slurry barrel is used for containing printing slurry;
the injection mechanism is used for injecting a thermal initiator below the liquid level of the printing slurry in the slurry barrel;
the three-dimensional movement mechanism is used for moving the injection mechanism in space.
In some preferred embodiments, the device further comprises a temperature control unit; the temperature control unit is used for keeping the printing slurry in the slurry barrel at a set temperature.
In some preferred embodiments, the device further comprises a rack and a space positioning frame; the space positioning frame is used for supporting the three-dimensional motion mechanism; the frame is used for supporting the space positioning frame and the pulp barrel.
In some preferred embodiments, the three-dimensional motion mechanism includes an X-axis joint, a Y-axis joint, and a Z-axis joint.
In a third aspect, the present application provides a computer readable storage medium having stored therein program instructions which, when executed by a processor of a computer, cause the processor to perform the above-described method.
Compared with the prior art, the beneficial effect of this application has:
under the liquid level, the thermal initiator and the printing material with the set temperature are directly cured and molded. The printing paste is low-viscosity paste, the viscous resistance of the low-viscosity paste is small, the liquid cannot generate 'tracks' due to the movement generated by injecting a thermal initiator, the solidified structure cannot deform due to viscous force, the solidified structure can keep the shape under the buoyancy of the liquid and the self solid rigidity, the printing material does not need to be supported, any shape can be formed, the size precision of the product can be improved, and the product with higher quality can be obtained by printing.
Drawings
FIG. 1 is a schematic flow diagram of a 3D printing method based on the addition of a thermal initiator according to one embodiment of the present application;
fig. 2 is a schematic structural diagram of a 3D printing apparatus based on the addition of a thermal initiator according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the embodiments of the present application more clearly apparent, the present application is further described in detail below with reference to fig. 1 to 2 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. The connection may be for fixation or for circuit connection.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description of the embodiments and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the application.
The embodiment provides a 3D printing method and device based on thermal initiator addition. The apparatus of the present embodiment is used to implement the method of the present embodiment. Of course, the method of the present embodiment can be implemented by other devices.
Referring to fig. 2, the apparatus of the present embodiment includes a pulp barrel 1, an injection mechanism 2, a three-dimensional movement mechanism 3, and a temperature control unit 4.
Referring to fig. 1, the method of the present embodiment includes steps S1 to S2.
Step S1, the printing paste is maintained at the set temperature.
The paste barrel 1 contains printing paste therein. The main components of the printing paste are resin and ceramic powder, namely the printing paste is ceramic paste; or, the main component of the printing paste is resin; of course, the printing paste also contains the necessary liquids.
The temperature control unit 4 performs heat preservation or temperature control on the pulp barrel 1 so as to maintain the printing paste in the pulp barrel 1 at a set temperature, which is a background temperature for performing a subsequent reaction.
The temperature control unit 4 is exemplified as a heating wire, and is provided on the outer surface of the pulp bucket 1.
In other embodiments, the printing paste may be placed in a chamber at a constant temperature to achieve temperature maintenance.
Step S2, injecting a thermal initiator under the liquid level of the printing paste according to the set trajectory, so that the thermal initiator reacts with a portion of the printing paste to form a cured reactant having a set shape.
The three-dimensional movement mechanism 3 is movable in three axial directions, such as along the X-axis, Y-axis, and Z-axis, to move the injection mechanism 2 in space.
At least a portion of the injection mechanism 2 is submerged below the level of the printing paste. Illustratively, the injection mechanism 2 includes a paddle head 21 and a pressing mechanism 22; the extruding mechanism 22 is connected with the pulp head 21 and is used for extruding the printing pulp to the pulp head 21 and flowing out to the outside; the head of the head 21 is then submerged below the level of the printing paste so that the thermal initiator can be injected below the level of the printing paste.
Under the control of the program, the three-dimensional movement mechanism 3 moves the injection mechanism 2 according to a set trajectory. The set trajectory is determined by the product to be printed, for example, by the shape or structure of the product to be printed. The thermal initiator flows out of the injection mechanism 2, and chemically reacts with the printing paste in contact therewith below the liquid surface of the printing paste to produce a solidified reactant having a predetermined shape. Wherein the set shape is also determined by the product to be printed. At least a portion of the injection mechanism 2 continues to inject the thermal initiator below the level of the printing paste to form a solidified reactant having a continuous shape; in the continuous outflow of the thermal initiator, the thermal initiator that has previously flowed out has reacted with a portion of the printing paste and cured, and the thermal initiator that has subsequently flowed out is gradually cured.
The curing reactant, which may also be referred to as a curing structure, is a substance formed by the reaction of a thermal initiator with a portion of the printing paste. That is, the thermal initiator participates in the chemical reaction and becomes part of the curing reactants after the reaction.
The ceramic material of the embodiment is low-viscosity slurry, and the viscosity of the printing slurry meets the following requirements: during the injection of the thermal initiator, the previously formed curing reactants stay substantially in place and the shape remains substantially intact. The density of the printing paste satisfies the following conditions: the curing reactant may be suspended in the printing paste.
In this embodiment, the thermal initiator and the printing material having the set temperature are directly cured and molded below the liquid level. At least one part of the injection mechanism 2 moves in the low-viscosity slurry, the viscous resistance of the low-viscosity slurry is small, the liquid cannot generate a track due to the movement of the injection mechanism 2, the solidified structure cannot deform due to viscous force, the solidified structure can keep the shape under the buoyancy of the liquid and the self solid rigidity, the printing material does not need to be supported, any shape can be formed, the size precision of the product can be improved, and the product with higher quality can be obtained through printing.
The threshold of the thermal curing temperature affects the rate of addition of the thermal initiator. Thus, the rate of injection of the thermal initiator can be varied by varying the temperature. Specifically, the temperature of the printing paste may be increased so that the speed of injecting the thermal initiator may be increased, thereby improving efficiency.
Referring to fig. 2, the apparatus of the present embodiment further includes a frame 5 and a space-positioning frame 6. The space positioning frame 6 is used for supporting the three-dimensional motion mechanism 3. The frame 5 is used for supporting the space positioning frame 6 and the pulp barrel 1.
The three-dimensional motion mechanism 3 includes an X-axis joint 31, a Y-axis joint 32, and a Z-axis joint 33. The X-axis joint 31, the Y-axis joint 32 and the Z-axis joint 33 are fixed on the space positioning frame 6 and are respectively used for realizing the movement in the X-axis direction, the Y-axis direction and the Z-axis direction.
Those skilled in the art will appreciate that all or part of the processes of the embodiments methods may be performed by a computer program, which may be stored in a computer-readable storage medium and executed to perform the processes of the embodiments methods. And the aforementioned storage medium includes: various media capable of storing program codes, such as ROM or RAM, magnetic or optical disks, etc.
The foregoing is a further detailed description of the present application in connection with specific/preferred embodiments and is not intended to limit the present application to that particular description. For a person skilled in the art to which the present application pertains, several alternatives or modifications to the described embodiments may be made without departing from the concept of the present application, and these alternatives or modifications should be considered as falling within the scope of the present application.

Claims (3)

1. A method of 3D printing based on the addition of a thermal initiator, comprising:
keeping a printing material at a set temperature, wherein the main component of the printing material is resin, or the printing material is printing slurry, and the main component of the printing slurry is resin and ceramic powder;
injecting a thermal initiator below the liquid level of the printing material according to a set track, so that the thermal initiator reacts with a part of the printing material to form a solidified reactant with a set shape, wherein the solidified reactant can keep the shape under the buoyancy of liquid and the rigidity of a solid state of the solidified reactant, and the thermal initiator can become a part of the solidified reactant after the reaction;
the viscosity of the printing material meets the following requirements: during the injection of the thermal initiator, the previously formed curing reactant stays in place and shape remains intact;
the density of the printing material satisfies: the curing reactant may be suspended in the printing material.
2. The 3D printing method according to claim 1, further comprising: varying the temperature, and thereby varying the rate of injection of the thermal initiator.
3. A computer-readable storage medium characterized by: the computer-readable storage medium has stored therein program instructions which, when executed by a processor of a computer, cause the processor to carry out the method according to any one of claims 1 to 2.
CN201911357452.4A 2019-12-25 2019-12-25 3D printing method and device based on thermal initiator addition Active CN110978500B (en)

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