3D printing device capable of controlling multi-component mixing ratio in real time

Abstract

A 3D printing device capable of controlling the mixing ratio of multiple components in real time comprises a heating extrusion module, a heating mixing module and a printing motion module which are connected to a rack, a lower end outlet of the heating extrusion module is connected with an upper end inlet of the heating mixing module, and a lower end outlet of the heating mixing module is connected with an upper end inlet of the printing motion module; the heating extrusion module comprises a plurality of charging buckets, and a discharging mechanism of each charging bucket is connected with an extrusion motor through a lead screw assembly; the heating and mixing module comprises a mixing barrel, and a mixing screw in the mixing barrel is connected with a screw driving motor; an extrusion motor and a screw driving motor are connected with a printer mainboard, rotation of the extrusion motor and the screw driving motor is controlled through set values, and then real-time regulation and control of the mixing ratio of multi-component materials in the printing process are achieved; according to the utility model, real-time uniform mixing regulation and control of high-viscosity solid-phase multi-material component systems with different mixing ratios in the 3D printing process can be realized, and printing and manufacturing of gradient materials and programmable materials are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of 3D printing, and in particular relates to a 3D printing device for real-time control of a multi-component mixing ratio. Background Art

[0002] 3D printing technology can design the corresponding printing path according to the actual morphology of the component, and accumulate the target component layer by layer, which can effectively reduce material loss and improve utilization rate. At the same time, no complex molds are required for the manufacture of complex structures. Therefore, 3D printing technology is an emerging additive manufacturing technology.

[0003] However, in recent years, with the continuous development of the field of engineering technology, the performance requirements for components have gradually developed in a more gradient, programmable and other design-oriented directions. In the traditional 3D printing process, the material system is mostly a homogeneous single-component material (publication number CN219706080U, name: a FDM type 3D printing extruder). Even some dual-nozzle 3D printing devices (publication number CN218084188U, name: a dual-nozzle 3D printer) are only based on the mixing and stacking of two single materials, and cannot achieve real-time mixing of two or even multiple component materials during the printing process; at the same time, the existing mixing devices are mostly liquid mixing and powder dry material stirring and mixing (publication number CN116766593A, name: powder in-situ proportioning and mixing system for multi-material 3D printing), and the fused deposition 3D printing technology mainly relies on the melting transformation of the printing material with the temperature to achieve molding. The printing material is often in a solid state, and how to achieve real-time control of the mixing ratio and uniform mixing during the printing of multi-component solid materials is also a problem to be solved.

[0004] In summary, there is an urgent need for a 3D printing device that can control the mixing ratio of multiple components in real time and achieve uniform mixing of multiple materials during the 3D printing process. Summary of the invention

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a 3D printing device for real-time control of the mixing ratio of multiple components, which can realize real-time and uniform mixing and regulation of high-viscosity solid-phase multi-material component systems with different mixing ratios during the 3D printing process, and meet the printing and manufacturing of gradient materials and programmable materials.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A 3D printing device for real-time control of a multi-component mixing ratio comprises a heating extrusion module 1, a heating mixing module 2 and a printing motion module 3 connected to a frame 4, wherein the lower end outlet of the heating extrusion module 1 is connected to the upper end inlet of the heating mixing module 2, and the lower end outlet of the heating mixing module 2 is connected to the upper end inlet of the printing motion module 3.

[0008] The heating extrusion module 1 includes more than two charging barrels 11, and the discharge mechanism of each charging barrel 11 is connected to the extrusion motor 13 via a screw assembly 12, and the screw assembly 12 is fixed on the frame 4; the lower outer side of each charging barrel 11 is connected to a first heating block 14, and the first heating block 14 is fixed to the frame 4 via a heating block fixing frame 15; the lower end outlet of each charging barrel 11 is connected to a heating material conduit 16.

[0009] The heating mixing module 2 includes a mixing barrel 21 fixed on the frame 4, and the upper inlet of the mixing barrel 21 is connected to the lower outlet of the heating extrusion module 1; the mixing screw 22 inside the mixing barrel 21 is connected to the screw drive motor 23; the outer side of the lower outlet of the mixing barrel 21 is connected to a second heating block 24, and the lower outlet of the mixing barrel 21 is connected to the upper inlet of the printing motion module 3.

[0010] The printing motion module 3 includes an X, Y, and Z three-axis printing motion platform fixed on a frame 4 and controlled by a motion controller. A printing molten pool 31 is connected to the X, Y, and Z three-axis printing motion platform. The upper inlet of the printing molten pool 31 is connected to the lower outlet of the heating and mixing module 2, and the lower outlet of the printing molten pool 31 is connected to the upper inlet of the print head 32.

[0011] Connect more than two extrusion motors 13 and one screw drive motor 23 to the E port of the printer main board, so that the rotation of more than two extrusion motors 13 and one screw drive motor 23 can be controlled by setting values ​​during printing, thereby realizing real-time regulation of the mixing ratio of multi-component materials during printing.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] Since the utility model is provided with a heating extrusion module 1, a heating mixing module 2 and a printing motion module 3, the corresponding extrusion motor and the screw drive motor can be called through the interface on the printer mainboard to realize real-time mixed extrusion of multi-component materials in different proportions during the printing process, which can meet the printing and manufacturing of non-homogeneous materials such as functional gradient materials and programmable materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a stereogram of the overall assembly of the utility model.

[0015] Figure 2 It is an axial side view of the utility model.

[0016] Figure 3 It is a three-dimensional diagram of the heating extrusion module of the utility model.

[0017] Figure 4 It is a stereoscopic diagram of the heating and mixing module of the utility model.

[0018] Figure 5 It is a three-dimensional diagram of the printing motion module of the utility model. DETAILED DESCRIPTION

[0019] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and should not be construed as limiting the present invention.

[0020] Reference Figure 1 , Figure 2 A 3D printing device for real-time control of a multi-component mixing ratio comprises a heating extrusion module 1, a heating mixing module 2 and a printing motion module 3 connected to a frame 4, wherein the lower end outlet of the heating extrusion module 1 is connected to the upper end inlet of the heating mixing module 2, and the lower end outlet of the heating mixing module 2 is connected to the upper end inlet of the printing motion module 3.

[0021] Reference Figure 3 The heating extrusion module 1 includes two charging barrels 11, and the discharge mechanism of the charging barrel 11 is connected to the extrusion motor 13 via a screw assembly 12, and the screw assembly 12 is fixed on the frame 4; the lower outer side of the charging barrel 11 is connected to a first heating block 14, and the first heating block 14 is fixed to the frame 4 via a heating block fixing frame 15; the lower end outlet of the charging barrel 11 is connected to a heating material conduit 16.

[0022] Reference Figure 4 The heating and mixing module 2 includes a mixing barrel 21 fixed on the frame 4, and the upper inlet of the mixing barrel 21 is connected to the heating material conduit 16 at the lower outlet of the heating extrusion module 1; the mixing screw 22 inside the mixing barrel 21 is connected to the screw drive motor 23; the outer side of the lower outlet of the mixing barrel 21 is connected to a second heating block 24, and the lower outlet of the mixing barrel 21 is connected to the upper inlet of the printing motion module 3.

[0023] Reference Figure 5 The printing motion module 3 includes an X, Y, and Z three-axis printing motion platform fixed on a frame 4 and controlled by a motion controller. A printing molten pool 31 is connected to the X, Y, and Z three-axis printing motion platform. The upper inlet of the printing molten pool 31 is connected to the lower outlet of the mixing barrel 21 of the heating and mixing module 2, and the lower outlet of the printing molten pool 31 is connected to the upper inlet of the print head 32.

[0024] Two extrusion motors 13 and one screw drive motor 23 are connected to the E port of the printer main board to control the rotation of the two extrusion motors 13 and one screw drive motor 23 by setting values ​​during printing, thereby achieving real-time regulation of the mixing ratio of multi-component materials during printing.

[0025] The working principle of the utility model is as follows: a corresponding printing G-code file is generated according to a target gradient structure or a programming structure, and during the printing process, the motion controller controls the feed amount of the extrusion motor 13 of the heating extrusion module 1 in real time to realize quantitative extrusion of different component materials; then, the different component materials are transformed into a molten viscous flow state through the first heating block 14 and then enter the heating mixing module 2 through the heating material conduit 16; the mixing screw 22 is used to stir evenly in real time to realize uniform mixing of the different component materials; then, the evenly mixed material is introduced into the printing molten pool 31 of the printing motion module 3 through the lower end outlet of the mixing barrel 21, and the printing of the target multi-component gradient structure or programming structure is completed through the print head 32.

[0026] The 3D printing method of this embodiment includes the following steps:

[0027] (1) Before printing begins, curing agent A and resin B are placed in two loading barrels 11 respectively. Afterwards, the loading barrels 11 are heated to above 100° C. and 120° C. respectively by the first heating block 14, and the materials gradually change from solid to liquid state;

[0028] (2) respectively controlling the extrusion motors 13 of the charging barrels 11 of the curing agent A and the resin B, setting the feed ratio of the two materials to 1:1, and the molten liquid components of the curing agent A and the resin B enter the heating and mixing module 2 through the heating material conduit 16;

[0029] (3) heating the mixing barrel 21 in the heating and mixing module 2 to above 120° C.;

[0030] (4) driving the screw motor 23 to rotate to achieve uniform mixing of the curing agent A and the resin B components;

[0031] (5) Running the printing program, the print head 32 starts extruding and printing along the printing path;

[0032] (6) Run for 1 minute, set the feed rate ratio of curing agent A and resin B to 1:2, and the molten liquid components curing agent A and resin B enter the heating and mixing module 2 through the heating material conduit 16;

[0033] (7) Run for 1 minute, set the feed rate ratio of curing agent A and resin B to 1:3, and the molten liquid components curing agent A and resin B enter the heating and mixing module 2 through the heating material conduit 16;

[0034] (8) Continue running for 1 minute to complete printing.

[0035] The curing agent contents in different areas of the printed samples were 1:1, 1:2, and 1:3, respectively, which enabled real-time control of the mixing ratio of different components during extrusion during the printing process.

[0036] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A 3D printing device for real-time control of multi-component mixing ratio, characterized in that: The invention comprises a heating extrusion module (1), a heating mixing module (2) and a printing movement module (3) connected to a frame (4); the lower end outlet of the heating extrusion module (1) is connected to the upper end inlet of the heating mixing module (2); and the lower end outlet of the heating mixing module (2) is connected to the upper end inlet of the printing movement module (3).

2. The device according to claim 1, characterized in that: The heating extrusion module (1) comprises more than two charging barrels (11), the discharge mechanism of each charging barrel (11) is connected to the extrusion motor (13) via a screw assembly (12), and the screw assembly (12) is fixed on the frame (4); the lower outer side of each charging barrel (11) is connected to a first heating block (14), and the first heating block (14) is fixed to the frame (4) via a heating block fixing frame (15); the lower end outlet of each charging barrel (11) is connected to a heating material conduit (16).

3. The device according to claim 1, characterized in that: The heating and mixing module (2) comprises a mixing barrel (21) fixed on a frame (4); an upper inlet of the mixing barrel (21) is connected to a lower outlet of the heating extrusion module (1); a mixing screw (22) inside the mixing barrel (21) is connected to a screw drive motor (23); a second heating block (24) is connected to the outer side of the lower outlet of the mixing barrel (21); and the lower outlet of the mixing barrel (21) is connected to an upper inlet of the printing motion module (3).

4. The device according to claim 1, characterized in that: The printing motion module (3) comprises an X, Y, and Z three-axis printing motion platform fixed on a frame (4) and controlled by a motion controller, a printing molten pool (31) being connected to the X, Y, and Z three-axis printing motion platform, an upper inlet of the printing molten pool (31) being connected to a lower outlet of the heating and mixing module (2), and a lower outlet of the printing molten pool (31) being connected to an upper inlet of a print head (32).

5. The device according to claim 1 or 2, characterized in that: The two or more extrusion motors (13) and a screw drive motor (23) are connected to the E port of the printer mainboard, so that the rotation of the two or more extrusion motors (13) and a screw drive motor (23) can be controlled by setting values ​​during the printing process, thereby achieving real-time regulation of the mixing ratio of the multi-component materials during the printing process.

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