Shell making method for impeller wax molds for hydraulic retarder of heavy vehicle
A technology of hydraulic retarder and truck, applied in the direction of hydraulic resistance brakes, manufacturing tools, brake types, etc., can solve the problems of unstable shell, affecting the smooth progress of baking, shell fragmentation, etc., to avoid the shell Fragmentation, assuring firmness, and shell-stabilizing effect
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[0015] The following embodiments may enable those skilled in the art to fully understand the present invention, but they do not limit the present invention to the scope of the described embodiments.
[0016] The wax moulding shell method of the truck hydraulic retarder impeller of the present invention is realized by sequentially processing the surface layer, the transition layer and the reinforcement layer on the surface of the wax model module after the tree assembly. The specific manufacturing method is as follows:
[0017] The first step is to make the surface layer: First, make sure that the temperature of the working environment is 24±2℃ and the relative humidity is 60-70%. Then, add distilled water with a quantitative silica sol in the proportion of 20% and pour it into the mixing tank. Then add 0.05% penetrant and 320 mesh zirconium powder to the mixing tank, and stir. The mixing time is more than four hours to form a surface layer coating. Then the wax mold module is slowly...
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