Packing powder for sintering ceramic core
A technology for sintering ceramics and cores, which is applied to cores, casting molds, casting molding equipment, etc., can solve the problems of difficult removal, unfavorable wax removal, and poor wax removal effect, so as to improve the qualification rate and provide good support. , The effect of good wax removal ability and surface finish
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Example Embodiment
[0019] Example 1
[0020] Make a reasonable ratio of a certain proportion of fine particle powder and a certain diameter ceramic ball. The mass ratio of fine particle powder and ceramic ball is 3:1; the fine particle powder is alumina powder with a mesh number of 100 mesh; the material of the ceramic ball It is alumina with a diameter of 0.5 mm; the ceramic ball and fine particle powder are mixed by ball milling. The mass ratio of the mixture powder composed of ceramic balls and fine particle powder and the ball for ball milling is 1:1, and the ball for ball milling is alumina ball The ball mill rotates at 300 rpm, and the ball milling time is 10 hours; the ball-milled filler powder is put into the sagger, the prepared ceramic core is placed in the filler, and then dewaxed, and then heated to the sintering temperature for the ceramic mold The core is sintered and cooled in the furnace; after cooling, the ceramic core is cleaned to obtain a ceramic core product. The core yield is ...
Example Embodiment
[0021] Example 2
[0022] Mix quartz powder with a mass ratio of 5:1 with quartz glass ceramic balls, where the mesh number of the quartz powder is 200 mesh; the diameter of the quartz glass ceramic balls is 1 mm; the quartz powder and the quartz glass ceramic balls are mixed by ball milling. The mass ratio of material powder to ball milling balls is 2:1, the ball milling balls are alumina balls, the speed of the ball mill is 600 rpm, and the milling time is 50 hours; the ball-milled filler powder is put into the sagger, and the prepared The ceramic core is placed in the filler, then dewaxed, and then heated to the sintering temperature to sinter the ceramic core, and then cooled with the furnace; after cooling, the ceramic core is cleaned to obtain the ceramic core product, and the core yield rate Above 85%, the surface is very smooth, see figure 2 .
Example Embodiment
[0023] Example 3
[0024] Mix talc powder with a mass ratio of 8:1 with alumina ceramic balls, where the talc powder has a mesh number of 150 mesh; the diameter of the alumina ceramic ball is 0.5 mm; the talc powder and alumina ceramic ball are mixed by ball milling. The mass ratio of powder to ball milling balls is 2:1, the ball milling balls are alumina balls, the speed of the ball mill is 600 rpm, and the milling time is 20 hours; fill the ball-milled filler powder into a sagger, and put the prepared The ceramic core is placed in the filler, then dewaxed, and then heated to the sintering temperature to sinter the ceramic core, and then cooled with the furnace; after cooling, the ceramic core is cleaned to obtain the ceramic core product, and the core yield rate Above 90%, the surface is very smooth, see image 3 .
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