A metal melt 3D printing nozzle and printing method
A 3D printing, metal melt technology, applied in the direction of additive processing, etc., can solve the problems of only jetting air flow, service performance and life limit, and the cycle extrusion volume cannot be adjusted, etc., to avoid oxidation and facilitate maintenance.
Active Publication Date: 2017-07-14
MENGYIN JINHUA MACHINERY CO LTD
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Problems solved by technology
However, due to the obvious compressibility of the gas, it is difficult to control the pressure and increase the frequency of the molten metal in the nozzle directly by using the compressed airflow, and the gas is easy to "shoot through" the melt and only eject the airflow; When working in the form of gas extruding the elastic diaphragm, the melt is extruded by the small elastic deformation of the diaphragm along the axial direction of the nozzle. The adjustable range of the extrusion amount is small, and due to the temperature and fatigue that the diaphragm can withstand, etc. Influence, performance and service life are limited to a certain extent; when driven by piezoelectric ceramics, the high-frequency expansion / contraction of piezoelectric ceramics in the polarization direction is actually used to drive the push rod connected to it to squeeze the melt. This method is easy to Adjust the printing frequency, but the amount of cycle extrusion can hardly be adjusted
Method used
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Embodiment Construction
[0030] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0031] see Figure 1-3 , a metal melt 3D printing nozzle, which includes a nozzle body and an air pressure supply system. Connected to provide power, the air cavity shell 2 and the shell base 17 jointly form the air cavity 3, the left side of the shell base 17 is processed with a feed channel 18, the top of the feed channel 18 is provided with a feeding port 9, the shell base The bottom of 17 is equipped with a crucible 8, the outside of the crucible 8 is provided with a heater 5, the base of the crucible 8 is equipped with a crucible end cover 6, and the crucible 8 is sealed with a melt cavity 7 through the crucible end cover 6, and the melt cavity 7 and the gas cavity 3 is provided with a ceramic sheet 10, the center of the crucible end cover 6 is processed with a nozzle 19, the right side of the housing base 17 is processed with an air inlet 4, and t...
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The invention relates to a 3D printing head for molten metal and a printing method. The 3D printing head comprises a head body and an air pressure supply system, wherein the head body comprises an air cavity shell; a piston is arranged inside the air cavity shell; a piston rod of the piston is connected with piezoelectric ceramics to supply power; the air cavity shell and a shell base form an air cavity together; a feeding channel is formed in the left side of the shell base; a material supplementation opening is formed in the top of the feeding channel; a crucible is mounted at the bottom of the shell base; a heater is arranged outside the crucible; a crucible end cover is mounted on a base of the crucible; a melt cavity is sealed in the crucible by the crucible end cover; a ceramic sheet is arranged between the melt cavity and the air cavity; a nozzle is arranged in the center of the crucible end cover; an air inlet is formed in the right side of the shell base; the air pressure supply system is connected with the air inlet. By virtue of the head and the printing method, a micro-droplet injection process can have high frequency, and the drive pressure is adjustable, namely the injection amount is adjustable.
Description
technical field [0001] The invention relates to a 3D printing nozzle and a printing method, in particular to a piston-driven ejection-type molten metal 3D printing nozzle, which belongs to the technical field of rapid prototyping. Background technique [0002] Droplet 3D printing is one of the technical hotspots in the current manufacturing field. This technology continuously ejects printing materials in the form of droplets and superimposes them layer by layer according to the designed path, gradually forming a solid body. Among them, the use of molten metal materials for droplet 3D printing is one of the research hotspots and difficulties, mainly because the molten metal has a high temperature, is easy to solidify, and is easy to oxidize, resulting in damage to equipment (mainly nozzles) and difficulty in maintenance. [0003] Existing molten metal 3D printing nozzles mainly adopt inert compressed gas direct drive, pneumatic diaphragm drive, piezoelectric ceramic drive and...
Claims
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IPC IPC(8): B22F3/115B33Y10/00B33Y30/00B33Y50/02
CPCB22F3/115
Inventor陈从平黄杰光聂葳胡琼李林波冉艳华
OwnerMENGYIN JINHUA MACHINERY CO LTD