Metal or ceramic consumable item for FDM 3D printing, preparation method for metal or ceramic consumable item and finished product printing method

Abstract

The invention discloses a metal or ceramic consumable item for FDM 3D printing, a preparation method for the metal or ceramic consumable item and a finished product printing method. The metal or ceramic consumable item comprises, by weight, 15-50 parts of a high polymer material, 0-2 parts of a compatilizer, 50-80 parts of metal powder or ceramic powder, 0.1-1 part of an antioxygen and 0.1-2 parts of a lubricating agent. The cost for equipment, the materials and machining is low; a printing structure is free of limitation, collapsing conditions do not exist in the printing process, supports can be removed before fusion sintering of the product, and treatment is easier compared with a manner that the supports are removed after SLS or EBAM fusion sintering; the requirements for the sphericity degree, the size distribution, the mobility and the like are relatively low; the types of metal and ceramic capable of being printed are wider; and the density of the finished products is higher, the strength is high, the degree of finish is higher, the miniaturization capacity is high, the thin-wall capacity is high, the complexity is high, the design tolerance level is high, and the material adaption scope is wide.

Description

Technical field: [0001] The invention relates to the technical field of 3D printing, in particular to a metal or ceramic consumable for FDM3D printing, a preparation method thereof, and a method for printing finished products. Background technique: [0002] Common metal or ceramic 3D printing technologies require the use of high-density energy, such as laser SLS or electron beam EBAM, to fuse metal or ceramic powder on the printing bed according to a predetermined shape, and create a three-dimensional structure layer by layer. This method has many disadvantages: ①The cost of equipment, materials and processing is very expensive; ②The printed structure is limited, such as hollow or closed objects are difficult to print; ③The requirements for the sphericity, particle size distribution, and fluidity of the powder are very strict. High, the quality of the powder has a great influence on the printing effect; ④The types of materials that can be printed are very limited. Ceramic 3...

AI Technical Summary

Problems solved by technology

This method has many disadvantages: ①The cost of equipment, materials and processing is very expensive; ②The printed structure is limited, such as hollow or closed objects are difficult to print; ③The requirements for the sphericity, particle size distribution, and fluidity of the powder are very strict. High, the quality of the powder has a great influence on the printing effect; ④The types of materials that can be printed are very limited

This ceramic 3D printing technology faces the following problems: ①When clay is printing a large object, it is easy to cause the printed object to collapse due to its own weight; ②The viscosity of the ceramic is relatively high due to the humidity, and air bubbles must be strictly removed , the material is not easy to prepare; ③ ceramics need to be processed or checked manually during the printing process

However, FDM3D printing technology is mostly used to print plastics, and cannot print metals and ceramics, which limits the application of metals and ceramics in 3D printing.

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