A 3D printing device and method for improving the quality of workpiece forming

A 3D printing and molding quality technology, applied in the field of additive manufacturing, can solve problems such as workpiece warping, blackening, and surface spheroidization, and achieve the effects of smooth and uniform airflow, high-quality molding, and atmosphere environment

CN110027216BActive Publication Date: 2021-06-11SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-06-11

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Abstract

A 3D printing device and method for improving the molding quality of workpieces, including a box body, a filter system, a blower, a blower device, a powder cylinder, and a processing cylinder; an atmosphere heating box is also included; the box body is a vacuum box installed in a vacuum The blower outside the box blows the gas into the vacuum box; the atmosphere heating box heats the atmosphere around the processing cylinder, so that the processing stage can ensure that the processing area maintains a constant hot air blowing, and in the cooling stage, the workpiece can be guaranteed to follow the preset cooling gradient Cooling; throughout the printing process, the atmosphere around the processing cylinder is blown out by the blower device, and then filtered by the filter system.
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Description

technical field

[0001] The invention relates to the field of additive manufacturing, in particular to an atmosphere circulation integration device and method for 3D printing equipment. Background technique

[0002] In the field of 3D printing, in the process of process testing, it is often encountered that the splash generated by sintering powder falls in the forming area, the atmosphere blown out by the blowing device contains fine impurities that have not been completely filtered, the water and oxygen content exceeds the standard, and the cooling gradient is too large. The problems will have a great impact on whether the parts can be formed with high quality, and in severe cases, they will directly lead to the failure of the parts to be formed. At present, most of the 3D printing equipment on the market have been equipped with a blower device, but the design of the air path is often relatively simple, the nozzle wind speed is uneven, and the simple design often causes the ...

Examples

Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0036] The scheme of the present invention is simple, practical and reliable, and adopts the advection nozzle, which can realize the uniform passage of airflow in a large area; the invention designs an atmosphere heating box, which can heat the atmosphere in the vacuum box and the wall plate of the processing cylinder, and at the same time, the atmosphere is heated when the workpiece is cooling The box can set a series of cooling temperature values, which reduces the cooling gradient; the blower used is equipped with a corresponding frequency converter, which can realize the free adjustment of the wind speed in the process test; the multi-stage impurity filtering device and the water and oxygen purification device are used to ensure the printing required. atmosphere environment.

[0037] figure 1 , 2, 3 is a general diagram of a 3D printing device that...