2023-10-18
Silica sol is a dispersion of nano-silicon particles in water or organic solvents, non-toxic, odorless, and non-flammable. Because the SiO2 in silica sol contains a lot of water and methyl groups, silica sol can also be described as SiO2.nH2O. Due to the excellent cohesive force and high temperature stability of silica sol, it is widely used in the field of silica sol precision castings as a key shell adhesive. However, the products of our company are favored by precision casting companies because of their advantages of high purity, uniform particle size, high-density sealant structure, good surface smoothness, and high-temperature strength. Sol, with more than ten years of technical expertise, has devoted himself to the continuous development and design of high-quality, cost-effective products based on customer satisfaction. The series of products dedicated to precision casting S-1430, S-830, S-40, etc., developed and designed by SKP fast The dry series products SKP-27, SKP-30, etc., have greatly saved production and manufacturing time for the foundry industry in terms of shell mold drying, and improved the high efficiency of shell making and the quality stability of shell molds. The SKP type quick-drying enhanced silica sol is modified on the basis of the general-purpose silica sol to change the structure of the colloidal solution and improve the stability, and then add Ningbo Zhiye silica sol to cast polymer polymers to reduce silica The cold filtration point of the colloidal sol improves the demulsibility of the silica sol at the same time, so as to improve the drying speed of the silica sol shell and quickly form the ideal moisture strength. When the shell is made under the same conditions, the wet strength of the SKP silica sol shell is three times that of the ordinary silica sol shell, and the residual strength is lower.
1. Application standards and characteristics: According to many tests and manufacturing data information in factories, SKP silica sol can ensure solid The drying time of the first layer lasts for 1~2 hours to make the shell, and it can ensure the standard tolerance of the casting. Naturally, the drying time for deep-hole parts and super-large objects should be correspondingly increased, but the overall drying time can be shortened by more than 50% compared with ordinary silica sol shells. It is worth noting that in the rapid shell-making process, SKP silica sol not only ensures the necessary strength at room temperature, high-temperature strength and casting specifications of the shell, but also has a low residual strength of the shell, which greatly improves the ordinary silicon sol. The difficulty of cleaning the sol shell is very attractive to precision casting of stainless steel plates and precision casting of alloy copper and aluminum alloy profiles.
Stability: The SP type is continuously stored in an incubator at 60°C, the viscosity increases by 7.64%, and the storage period is more than one year. Due to the use of SKP-27 quick-drying silica sol shells has high-quality features such as fast speed, good air permeability, guaranteed casting precision, and easy shell cleaning, it will gradually replace the current ordinary silica sol and become the best adhesive for precision castings.