Porous elastic foam production method based on 3D printing of wet cured silica gel

Abstract

The invention relates to a porous elastic foam production method based on 3D printing of wet cured silica gel. More than eight layers of foam materials are produced by utilizing a fluid printer. Each layer of foam material is formed by uniformly arranging patterns of different shapes, and the patterns are classified into five types, i.e. a rectilinear type, a sinusoid wave type, an 8 type, a winding type, and a side-kick type; the processing technological parameters are silica gel viscosity R, silica gel ejection flow rate Q, a diameter D of a spray head, a height H of the spray head and a moving speed UO of the spray head; among the technological parameters, the silica gel viscosity R, the silica gel ejection flow rate Q and the diameter D of the spray head are conventional technological parameters, the height H of the spray head is 6 to 51 mm, and the moving speed UO of the spray head is 2 to 14 mm / s; pattern parameters are a vibration amplitude W of a graph, a periodic length P of the graph and a loop width of the graph; and a porosity of a finished product is 30 to 50 percent, and an elastic modulus is greater than 5.0KPa. Average time for producing the porous silica gel elastic foam in a 3D printing manner is 50 to 70 min, and the production efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of product preparation by 3D printing, and in particular relates to a method for preparing porous elastic foam by 3D printing of silica gel. Background technique [0002] The existing silica gel 3D printing technology is mainly used to make relatively dense silica gel products, and its porosity and bulk density cannot be adjusted according to the functional requirements of the product. Functional requirements of silicone products or silicone elastic foam products in the medical field. [0003] The existing silicone 3D printing technology and silicone elastic foam manufacturing methods still have other deficiencies: (1) Most of the silicone products suitable for the medical field produced by the foaming method have a high packing density, and this manufacturing process not only consumes time and materials, and will increase excess weight when installed on the human body; (2) the current products made of sili...

AI Technical Summary

Problems solved by technology

[0002] The existing silica gel 3D printing technology is mainly used to make relatively dense silica gel products, and its porosity and bulk density cannot be adjusted according to the functional requirements of the product. Functional requirements of silicone products or silicone elastic foam products in the medical field

[0003] The existing silicone 3D printing technology and silicone elastic foam manufacturing methods still have other deficiencies: (1) Most of the silicone products suitable for the medical field produced by the foaming method have a high packing density, and this manufacturing process not only consumes time and materials, and will increase excess weight when installed on the human body; (2) the current products made of silica gel for catalyst manufacturing and catalyst carriers do not have a good specific surface area, so the production efficiency is not high; (3) usually The flexibility of the production process of silicone products is relatively small. When manufacturing silicone products of different specifications, the cost will increase accordingly, and there are deficiencies.

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