A powder 3D printing method based on instant inorganic binder

Abstract

The invention discloses a powder 3D printing method based on instant inorganic binder. The powder 3D printing method comprises the following steps: firstly, using deionized water as a binder for a 3D printer, and adding a co-volatile agent, a coloring agent and a modifying agent to form a mixed solution as a binder for powder 3D printing; secondly, using instant sodium silicate as a solid binder, mixing the solid binder with 3D printer raw material powder, and then adding flux to form mixed powder as a material for the powder 3D printing; finally, performing the powder 3D printing by using the prepared binder and the mixed powder, wherein the binder prepared from water and the instant sodium silicate are used as the binder for a powder 3D printing process; as for a powder 3D printing nozzle, a solution with the viscosity close to water is only filled, and the solution is stable in performance, easier to store, unlikely to block the nozzle and free of corrosive effect on the nozzle. By the powder 3D printing method, rapid powder 3D printing of a product with complex structure is achieved, and the environment friendliness of the manufacturing process is ensured; by the powder 3D printing method, the production cost is reduced and the product quality is improved.

Description

technical field [0001] The invention relates to the technical field of powder 3D printing, in particular to a powder 3D printing method based on an instant inorganic binder. Background technique [0002] Instant sodium silicate is an inorganic high-temperature binder commonly used in industry. The commonly used one is instant sodium silicate. When the requirements are high, instant potassium silicate can be used. If water is used as the solution, instant sodium silicate can be quickly dissolved in In water, a binder with strong bonding ability is formed. It is widely used in sand foundry industry, ceramic industry, coating industry, binder in thermal insulation materials, binder for welding electrodes, acid-resistant cement, and quick-drying cement. and other additives in cement. [0003] Powder 3D printing (3DP) is a 3D printing method that utilizes droplet jetting, powder bonding technology. Under the control of the computer, according to the information of the current l...

AI Technical Summary

Problems solved by technology

[0005] 1) The organic binder has poor stability, is easy to deteriorate, is difficult to store for a long time, and has more storage requirements. At the same time, this kind of binder is also easy to corrode the delivery pipeline and the printing nozzle, and its denaturation may cause the nozzle. Blockage, resulting in process instability and affecting the entire powder 3D printing process;

[0006] 2) The parts obtained by powder 3D printing usually need post-processing such as degreasing and calcination to obtain functional parts with good mechanical properties and precision. However, due to the physical and chemical instability of organic substances at high temperatures, organic bonding After degreasing and calcination, it is difficult to obtain high density and high temperature strength of the parts manufactured by 3D printing of the powder of the agent, and may produce toxic gases at the same time.