Pressure filling device and method of molten metal

Abstract

The invention discloses a pressure filling device and a pressure filling method for molten metals. The pressure filling device for the molten metals mainly comprises a vacuum system, an exhaust pipe, a funnel, a valve, a liquid filling pipe, a glass cell-shell or a metallic cell-shell, a crucible, a thermometer well and a gas bag. The pressure filling method for the molten metals through the device comprises the following steps: firstly, performing leakage detection on a filling container; secondly, making the internal environment of the filling container form a positive pressure environment or a negative pressure environment, and infusing a metallic solution into the filling container; and finally, sintering and sealing a filling opening, and continuously performing vacuum exhaustion to make a triple-point small fixed-point pool container. The negative pressure method and the positive pressure method of the pressure filling method for the molten metals overcomes the defect of large viscosity of metal liquor, so that the problem of filling a metallic solution can be successfully solved, and a small fixed-point pool can be quickly and conveniently made with time and energy conversation.

Description

technical field [0001] The invention relates to a pressure filling device and method for molten metal, in particular to a device and method for automatically filling metal solution into a container through pressure difference. Background technique [0002] In thermometer calibration, some thermometers are calibrated using small fixed-point cells and fixed points. The existing method of making small fixed-point cells and fixed points is generally to manually put indium, gallium, benzoic acid, and phenoxybenzene into the crucible. Then cover the crucible lid, then put the crucible into the bulb, seal the bulb, and then melt and evacuate. In this operation process, very high-purity (more than 6 9) metals are easy to be polluted and oxidized, and easy to Make the operating people and the environment polluted. Among these metals, some of them are solids whose melting points are higher than room temperature, and some are very viscous liquids close to or lower than normal temperat...

AI Technical Summary

Problems solved by technology

[0002] In thermometer calibration, some thermometers are calibrated using small fixed-point cells and fixed points. The existing methods for making small fixed-point cells and fixed points are generally to manually put indium, gallium, benzoic acid, and phenoxybenzene into the crucible. Then cover the crucible lid, then put the crucible into the bulb, seal the bulb, and then melt and evacuate. During this operation, very high-purity (more than 6 9) metals are easy to be polluted and oxidized, and easily Contaminate the operating people and the environment

Among these metals, some of their melting points are solids higher than room temperature, and some are close to or lower than normal temperature, which are very viscous liquids. Using the above filling methods is easy to damage the crucible, resulting in waste products and waste, which consumes time and energy.

It is not feasible to use the gravity method to fill the metal after heating. Since the inner diameter of the filling port is generally only about 2-3 mm, and the liquid metal has a high viscosity, it is not feasible to use the filling method relying on gravity, so it is urgently needed. A fast, convenient, time-saving and energy-saving device and method for making small fixed-point pools and fixed-point containers

Images