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Liquid material printing head for 3D printer

A 3D printer, liquid material technology, applied in 3D object support structure, additive processing, additive manufacturing, etc., can solve the problems that restrict the popularization and promotion of extruded liquid material 3D printing technology, the height of the nozzle cannot be adjusted automatically, and the nozzle is scratched for printing. Models and other issues, to achieve good scalability and material-cut back suction function, simple and compact structure, and reduce volume and weight.

Active Publication Date: 2019-12-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether it is a single-nozzle, double-nozzle or multi-nozzle design, most of the nozzle positions and nozzle heights of existing extrusion 3D printers are fixed. This traditional design will bring some problems: the single nozzle in the non-printing area When moving quickly, the nozzles often scratch the printed model, unless the risk is avoided by passively changing the Z-axis coordinates; in the case of double nozzles or multiple nozzles, because the height of each nozzle is the same, when one nozzle is working, the other The nozzle often scratches the model, which affects the appearance of the printed model
The above-mentioned existing technologies all involve the 3D printing of liquid materials and the design of double nozzles, but the height of the nozzles cannot be automatically adjusted, which will inevitably affect the printing quality and restrict the popularization and promotion of extrusion liquid material 3D printing technology

Method used

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  • Liquid material printing head for 3D printer
  • Liquid material printing head for 3D printer
  • Liquid material printing head for 3D printer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] like figure 1 and figure 2 As shown, a liquid material printing head for a 3D printer is mainly composed of a cylinder part 1, a connecting assembly 2 and a barrel part 3 connected in sequence from top to bottom.

[0042] The cylinder part 1 comprises a cylinder body, a piston body 11, a valve rod 12, a first air inlet 13 and a second air inlet 14; the cylinder body is cylindrical; the air chamber of the cylinder body is provided with a seal sliding fit with the air chamber wall. The piston body 11; the upper end of the piston body 11 and the valve rod 12 is fixedly connected, and the side walls of the air chamber above and below the piston body 11 are respectively provided with a first air inlet 13 and a second air inlet 14;

[0043] The connecting assembly 2 mainly includes a connecting bracket 20 and a valve needle clamp 24; the connecting bracket 20 is provided with a valve needle clamp 24, the upper end of the valve needle clamp 24 forms a distance from the upper...

Embodiment 2

[0058] like Figure 7 As shown, two 3D printer liquid material printing heads with the same structure as in Example 1 are used and installed side by side on the X-axis slider of the 3D printer at the same height to form a two-liquid double-head printing assembly. Wherein, the first print head is used for printing the first liquid material, and the second print head is used for printing the second liquid material. The two liquid materials may be the same material with different colors, or different materials with different physical properties. The two print heads can choose print heads with different specifications according to the characteristics of the liquid material to be printed and the printing requirements.

[0059] Use 3D modeling software and slicing software to create a Gcode file of a two-color or two-material model, and input it into the 3D printer to control the two print heads to alternately print each layer of structure according to their respective motion traje...

Embodiment 3

[0062] like Figure 8 , Figure 9 As shown, a 3D printer with the same structure as in Embodiment 1 is used to print the liquid material, and the solid plastic filament print head in the prior art is installed side by side on the X-axis slider of the 3D printer according to the same height, forming a kind of Solid-liquid dual-head printing components. Among them, the liquid print head is used to print liquid materials, and the solid print head is used to print plastic filaments. Plastic filaments can be used as support materials or skeleton materials for liquid materials or perform other functions. Liquid print head According to the characteristics of the liquid material and printing requirements, select the print head with appropriate specifications.

[0063] Use 3D modeling software and slicing software to create the Gcode file of the dual-material model, input it into the 3D printer, and control the two print heads to alternately print each layer of structure according t...

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PUM

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Abstract

The invention discloses a liquid material printing head for a 3D printer. The liquid material printing head is mainly composed of an air cylinder part, a connecting assembly and a charging barrel partwhich are sequentially connected from top to bottom. The charging barrel part mainly comprises a guide sleeve, a charging barrel valve, a printing nozzle and a sleeve lock nut; a piston body in sealed sliding fit with the wall of the air chamber is arranged in the air chamber of the air cylinder body; the connecting assembly mainly comprises a connecting support and a valve needle clamp. The piston body is fixedly connected with the upper end of the valve rod; the lower end of the valve rod extends out of the air cylinder body, enters the sealing sleeve and is connected with the upper end ofthe valve needle clamp after penetrating through the sealing sleeve; the valve needle penetrates through the discharge port, the material cavity, the top needle hole and the spring from bottom to topand is connected with the lower end of the valve needle clamp; the sealing valve head is in a cone shape, the discharging port is closed when the valve needle moves upwards, and the discharging port is opened when the valve needle moves downwards. The liquid material printing head is simple and reliable in structure and convenient to maintain, has the functions of material cutting back suction andautomatic stretching and retracting of the printing spray heads, and is particularly suitable for multi-spray-head multi-material 3D printing containing liquid materials.

Description

technical field [0001] The invention relates to a 3D printer, in particular to a liquid material printing head for a 3D printer, and belongs to the technical field of 3D printing. Background technique [0002] 3D printing is a rapid prototyping technology that builds objects by printing solid powder, liquid materials or polymer melt materials layer by layer based on digital model files. At present, there are many existing 3D printing technologies, including extrusion molding (fused deposition FDM and liquid direct writing LDW), photocuring molding (laser scanning SLA, projection curing DLP or polymer injection PolyJet) and powder coating molding. (laser sintering SLS / SLM or inkjet bonding 3DP), etc., among which extrusion 3D printing is the earliest and most widely used one. [0003] In the traditional extrusion 3D printing technology, the single-nozzle design is mostly used, and the technology is relatively mature. With the development of multi-color and multi-material 3D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/112B29C64/209B29C64/30B29C64/393B33Y30/00B33Y50/02
CPCB29C64/112B29C64/209B29C64/30B29C64/393B33Y30/00B33Y50/02Y02P10/25
Inventor 侯有军
Owner SOUTH CHINA UNIV OF TECH