Method for drying gel injection moulding blank

Abstract

The invention discloses a drying method for a gel mold-injection blank, which employs the characteristics of certain low-boiling organic matters capable of being mutually dissolved with water and with surface tension lower than that of the water to dip the gel mold-injection blank into the organic matter or the mixture of the organic matter and the water to lead the water in the blank to be replaced, thereby drying the blank. The low-boiling organic matters mainly comprise: the alcohols of low molecular weights like methanol, ethanol, and propanol, the ketones of low molecular weights like ketone, ketol, and acetone, the ethers of low molecular weights like methyl ether, and aether, as well as the aldehydes of low molecular weights like formaldehyde, acetaldehyde, and propionaldehyde. The drying method for the gel mold-injection blank is simple to be operated and has high efficiency; the dried blank does not have chaps or other drying defects; the surface quality is good; moreover, the energy consumption is small and the cost is low; the invention is suitable for industrial production.

Description

technical field [0001] The invention relates to a method for drying a gel casting body. Background technique [0002] Ceramic materials have a series of excellent mechanical properties and chemical stability such as high strength, high hardness, high temperature resistance, wear resistance and corrosion resistance. ground application. Therefore, the precision molding and preparation technology of various high-performance ceramic material structural components is becoming more and more important. However, the traditional ceramic molding technology has exposed many problems in the molding and preparation of precision ceramic parts: the uneven density of the ceramic body prepared by dry molding makes the performance of each part inconsistent, and it is difficult to prepare structural parts with complex shapes by dry molding ; Large-scale structural components prepared by traditional wet forming techniques such as slip casting are prone to density gradients inside, and are pro...

AI Technical Summary

Problems solved by technology

However, the traditional ceramic molding technology has exposed many problems in the molding and preparation of precision ceramic parts: the uneven density of the ceramic body prepared by dry molding makes the performance of each part inconsistent, and it is difficult to prepare structural parts with complex shapes by dry molding ; Large-scale structural components prepared by traditional wet forming techniques such as slip casting are prone to density gradients inside, and are prone to cracking or deformation during sintering

However, the green body needs to be dried at low temperature for a long time after demolding, resulting in a long preparation cycle (especially for thick-walled structural parts), low production efficiency, and often due to improper temperature control, the surface of the green body is cracked or thermally deformed, resulting in irreparable defect