According to the basic principle of fluid mechanics, by controlling the speed of tin liquid in molten state, the thickness of tinfoil is adjusted, and the temperature of the thermostat is constant at 300±10℃ (the melting point of tin is 232 ℃) to ensure that the tin in the furnace is completely melted. Cutting a rectangular port on the bottom of the stove can control the opening and closing of the rectangular mouth.
The molten tin fluid is injected from another molten tin furnace and then flows out of the rectangular mouth of the thermostat to the conveyor belt, cooling on the conveyor belt and forming tin foil. Due to the viscous action of liquid, the tin liquid after the rectangular mouth will form a certain shrinkage cross section, which will directly affect the uniformity, amplitude and thickness of the forming tin foil. For this reason, a certain amount of pressure is applied to the top surface of the tin liquid in the thermostat, so that the tin liquid coming out of the rectangular mouth does not shrink by cross section within the distance of the design requirements, and this measure has been verified experimentally. At the same time, the optimal distance of the bottom distance conveyor belt is selected, the overflow port is open at the top of the constant temperature, and the excess tin liquid in the furnace overflows through the overflow port to keep the height of the liquid surface constant.
Thus, when the rectangular port is opened, the flow of tin fluid from the rectangular mouth to the conveyor belt belongs to a stable flow. The thickness of the tin foil can be adjusted as long as the speed of the conveyor belt is controlled. Because the high speed movement of the conveyor belt is easy to achieve, the use of this method can theoretically make the thickness of tin foil very thin.