How to configure precision cast paint
There are some curious customers who are really interesting things. Recently, everyone is interested in the precision casting coating preparation method, then our company will explain to you:
The physical parameters of silica sol are mainly composed of SIO2 content, density, Na2o content, pH value, kinematic viscosity, colloidal particle diameter, etc. These physical and chemical parameters mainly affect the strength of the precision casting shell, the stability of the coating and the powder to liquid ratio of the coating.
Because precision casting companies are very difficult to detect these physical and chemical parameters, on the one hand, we must strengthen the selection, evaluation and confirmation of the supplier. On the other hand, the surface layer and the back layer should choose different specifications of silica sol, and choose the surface layer. S-830 silica sol, S-1430 silica sol was selected for the back layer. The method of preparing the coating directly affects the quality of the Carbon Steel casting in precision casting. Precision casting
The coating preparation is usually first added with a silica sol, then mixed with a wetting agent, a refractory powder is added during stirring, and finally a defoaming agent is added. In order to ensure the quality of the paint, when the top coat is all new material, the mixing time should be more than 24 hours to use. For some parts, the mixing time can be shortened to 12 hours. The mixing time of the transition layer and the back layer coating can be reduced. When the top coat is all new paint, the stirring time is more than ten hours, and when it is new, the mixing time can be shortened by half. If the coating is not used, it should be sealed to prevent evaporation of water.
The physical parameters of silica sol are mainly composed of SIO2 content, density, Na2o content, pH value, kinematic viscosity, colloidal particle diameter, etc. These physical and chemical parameters mainly affect the strength of the precision casting shell, the stability of the coating and the powder to liquid ratio of the coating.
Because precision casting companies are very difficult to detect these physical and chemical parameters, on the one hand, we must strengthen the selection, evaluation and confirmation of the supplier. On the other hand, the surface layer and the back layer should choose different specifications of silica sol, and choose the surface layer. S-830 silica sol, S-1430 silica sol was selected for the back layer. The method of preparing the coating directly affects the quality of the Carbon Steel casting in precision casting. Precision casting
The coating preparation is usually first added with a silica sol, then mixed with a wetting agent, a refractory powder is added during stirring, and finally a defoaming agent is added. In order to ensure the quality of the paint, when the top coat is all new material, the mixing time should be more than 24 hours to use. For some parts, the mixing time can be shortened to 12 hours. The mixing time of the transition layer and the back layer coating can be reduced. When the top coat is all new paint, the stirring time is more than ten hours, and when it is new, the mixing time can be shortened by half. If the coating is not used, it should be sealed to prevent evaporation of water.
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