Nozzle and printing device

Abstract

The invention provides a nozzle and printing equipment. The nozzle comprises an extrusion head, a rotating piece, a first connecting part, a second connecting part, a first sliding part and a second sliding part, wherein a spiral groove is formed in a first end surface of the rotating piece; the extrusion head is arranged in a center hole; a first end part of the extrusion head extends out of thefirst end surface; the first connecting part and the second connecting part are symmetrically arranged about the center axis of the rotating piece, and are both slidingly connected with the spiral groove; the first sliding part is fixedly connected with the first connecting part; the second sliding part is fixedly connected with the second connecting part; and the first sliding part and the secondsliding part relatively slide in the first end part of the extrusion head to change the section of an extrusion port of the extrusion head. The nozzle is adjustable in section, higher in sensitivityand higher in controllability, can reduce the step errors of machined parts, increases the bonding surface areas between layers, and improves the structural strength of the machined parts in the thickness direction.

Description

technical field [0001] The invention relates to the field of processing technology, in particular to a nozzle and a printing device. Background technique [0002] Additive Manufacturing technology (Additive Manufacturing, referred to as AM) refers to the method of accumulating materials layer by layer to manufacture solid parts. With the advantages of good economy, high material utilization efficiency and good production predictability, this technology is widely used in machinery manufacturing, biomedicine, architectural design and other fields. [0003] Fused Deposition Modeling (FDM for short) is the most widely used technology in additive manufacturing. The FDM process utilizes the hot-melt and cohesive properties of thermoplastic materials, and is piled up layer by layer under the control of single-chip microcomputers and other control equipment. Compared with other additive manufacturing technologies, it has the advantages of mature technology and equipment, convenien...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a nozzle and a printing device to solve the technical problems that existing nozzles with fixed round holes lead to obvious surface texture of the processed parts, low dimensional accuracy and high surface roughness.

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