Pressure casting real-time monitoring device in mould cavity

Abstract

The invention discloses a pressure casting real-time monitoring device in a mould cavity. The pressure casting real-time monitoring device comprises a valve element and a valve sleeve for fixing the valve element in the mould cavity. The front end face of the valve element serves as a molded face, and a valve seat is further arranged on the rear end face of the valve element. The valve element is provided with gas exhaust and overflow holes, a trumpet-shaped opening is formed in the front end of each gas exhaust and overflow hole, and the openings are filled with filter materials. A first pressure sensor fixing hole is formed in the tail end of one gas exhaust and overflow hole in the direction perpendicular to the axial direction, and a first pressure sensor is arranged in the first pressure sensor fixing hole. A second pressure sensor is arranged at the tail end of the valve element, and when the valve element slides front and back relative to the valve seat, the second pressure sensor is triggered. A thermocouple tube is further arranged at the axis of the valve element in the axial direction, and the rear end of the thermocouple tube is fixed through a thermocouple fixing seat arranged in the valve element. According to the monitoring device, various important technological parameters in the mould cavity can be precisely measured and monitored in real time.

Description

technical field [0001] The invention belongs to the field of die-casting, and more particularly relates to a real-time monitoring device for die-casting in a mold cavity. Background technique [0002] Die casting (referred to as die casting) is a metal precision molding technology, which is a complex dynamic thermodynamic process. A casting method that obtains die castings under rapid solidification. The above-mentioned casting molding method involves the following major process elements: ① temperature, including the temperature of the aluminum liquid and the mold temperature, ② filling speed, ③ pressure, including the gas back pressure of the cavity during filling and the metal pressure during filling, especially during the pressurization process. Therefore, the ability to monitor the above process elements in real time plays a very important role in improving the precision of casting molding. [0003] Generally speaking, first of all, thermocouples can be directly embedd...

AI Technical Summary

Problems solved by technology

The current monitoring methods are mainly based on Pascal’s law, that is, the molten metal in the molten state is simplified into a fluid, and the force on the molten metal is the same everywhere. However, the actual filling process may not be the case. For example, the cold material at the front end of the filling, that is, the water tail, is at the beginning of pressurization. The molten metal near the feed inlet first solidifies and loses fluidity and pressure transmission ability, so that the casting pressure cannot be effectively transmitted. Although the forming pressure of each part of the casting can be predicted by numerical simulation methods, it lacks actual verification and effective real-time monitor

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