Composite sintering equipment and method of use of a 3D printed metal entity
A technology of 3D printing and sintering method, applied in the field of 3D printing, can solve the problems of long duration of sintering process, difference in consistency of internal and external sintering, etc., and achieve the effect of good practical value and low energy consumption
Active Publication Date: 2021-02-12
DONGGUAN ZHANSHENG MOLD
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Problems solved by technology
The current sintering furnace for 3D printed metal entities generally adopts a box-type sintering furnace, and the heating mode is resistance wire heating, and the entire sintering process lasts for a long time, usually taking more than 30 hours, and is subject to the heating mode , the traditional sintering furnace can only be used for smaller products (cross-section less than 300mm X 300mm, or the weight is less than 10KG), for larger metal products, if the traditional sintering furnace is used, observe the metal product after sintering There are obvious differences in the internal and external sintering consistency of metal products.
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Embodiment Construction
[0020] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.
[0021] See figure 1 As shown, this is a structural schematic diagram of a composite sintering equipment for a 3D printed metal entity in the present invention, which mainly includes: a furnace body 1 for sintering, an infrared heating device 2, a microwave heating device 3, a cooling device 4, a vacuum pump 5 and Load mechanism6.
[0022] Among them, the furnace body 1 is made of stainless steel, and the interior is hollow, that is, the furnace body 1 has a cavity 10 for placing a 3D printed metal entity, and the furnace body 1 has an openable cover. , close the cover, so that the cavity 10 becomes a closed space.
[0023] The infrared heating device 2 is arranged in the cavity 10 , and the microwave heating device 3 includes magnetrons 31 distributed on the cavity 10 .
[0024] The infrared heating device 2 is composed of several quartz lamp tu...
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Abstract
The invention discloses a composite sintering device and method for a 3D printed metal entity. The composite sintering method is as follows: the first step is to place the 3D printed metal entity in the airtight cavity of the sintering furnace; the second step is to pass the The infrared heating device heats the metal entity to the second temperature value; the third step is to turn off the infrared heating device, turn on the microwave heating device arranged on the cavity, and continue to heat the metal entity to the third temperature value; In the fourth step, after cooling down the cavity, the metal entity can be taken out from the cavity. Due to the uniformity of microwave heating and sintering and the rapid cooling design, rapid sintering of large-scale metal printing parts can be achieved, and metal entities with high density and excellent uniformity can be obtained.
Description
Technical field: [0001] The invention relates to the technical field of 3D printing, in particular to a composite sintering device and method for 3D printed metal entities. Background technique: [0002] With the development of 3D printing technology, it has been developed to use 3D printing technology to directly manufacture metal parts. At present, the main metal 3D printing processes are: 1. Selective Laser Sintering (Selective Laser Sintering, SLS) technology; 2. Direct Metal Powder Laser Sintering (Direct Metal Laser Sintering, DMLS); 3. Selective Laser Melting (Selective Laser Melting, SLM) technology; 4. Laser Engineered NetShaping (LENS) technology; 5. Electron Beam Selective Melting (EBSM) technology. [0003] The currently commonly used metal 3D printing technology is: SLS technology. The entire process device is composed of a powder cylinder and a molding cylinder. The piston of the working powder cylinder (powder feeding piston) rises, and the powder is evenly ...
Claims
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IPC IPC(8): B22F12/00B22F10/64B22F10/28B33Y30/00B33Y40/20
CPCB33Y30/00B33Y40/00B22F10/10B22F10/00B22F10/32B22F12/70B22F12/13B22F10/20B22F12/20Y02P10/25
Inventor 周遂新
Owner DONGGUAN ZHANSHENG MOLD