FIELD: additive technologies.
SUBSTANCE: versions of a printing head and an additive manufacturing method are disclosed. In additive manufacturing method, material components are separately fed into printing head, are mixed in a mixing device and the material formed as a result of a chemical reaction forms an article in layers. A suction cavity of variable volume is created in the printing head and material retraction is ensured by increasing the volume of the suction cavity. In the printing head, the housing body, the spool body, the sealing surface of the profiled channel, the sealing surface of the spool and the end surface of the spool together form a suction cavity, volume of which depends on the position of the spool in the shaped channel.
EFFECT: high quality of products, high technological capabilities of 3D printing.
17 cl, 4 dwg
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