Pressure adjustable casting method and crucible therefor

Abstract

A pressure-adjustable casting method includes such steps as putting casting mould and molten metal respectively in upper sealed chamber and crucible, vacuumizing them, filling inertial gas or compressed air in the crucible, pressing the molten metal in mould cavity along the flow-up tube under the action of adjustable pressure difference, vacuumizing the vacuum hood while adjusting the pressure in crucible to quickly change it from negative pressure to positive one, solidifying the cast workpiece, and releasing the pressure. Said crucible for adjusting pressure is composed of crucible body, water cooling flange, and pressure adjusting pipe interface.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for better control over how much air enters into an Al alloy's container while still allowing it to cool down quickly without losing its shape or causing damage due to excessive heat generated when melts them at high temperatures. It also prevents any gases like oxygen inside the molten metal being poured out through vents on top of the vessel walls. Additionally, this design makes sure there isn’t too many bubbles getting trapped between layers of different types of metals used in making these products.

Problems solved by technology

Technological Problem: Current methods used by industrial companies such as diecasting involve pressing an alloy inside a container filled with air before pouring it out on top. However, these techniques have drawbacks including difficulty achieving tightness due to residual gases generated during cool down processes (vapor), potential issues like pitting corrosion, and difficulties associated with producing densely sided products without defects caused by excess atmospheric oxygen levels. Additionally, current methods require expensive materials and complicated apparatus design, making them challenged towards more efficient production.

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