DEVICE FOR DEPRESSURIZING AND DEFOAMING MOLTEN GLASS, METHOD FOR DEPRESSURIZING AND DEFOAMING MOLTEN GLASS, DEVICE FOR MANUFACTURING GLASS PRODUCT, AND METHOD FOR MANUFACTURING GLASS PRODUCT

摘要

One of the purposes of the present invention is to provide a depressurizing and defoaming device which highly effectively depressurizes and defoams molten glass. The present invention is a device (100) for depressurizing and defoaming molten glass, the device (100) being provided with a depressurizing and defoaming tank (3) which has an inner pressure set to be lower than the atmospheric pressure and which allows foams in supplied molten glass (G) to be lifted and broken. The device (100) for depressurizing and defoaming molten glass is also provided with: an atmosphere control unit (16) having a hollow structure and connected to the space above the molten glass containing section of the depressurizing and defoaming tank (3) through at least two connection paths (14, 15); a gas discharge opening (17) for depressurization, the gas discharge opening (17) being formed in the atmosphere control unit (16); and a flow regulation member (20) provided around the opening (18) on the outlet side of an inflow-side connection path (15), through which gas flows from the depressurizing and defoaming tank (3) to the atmosphere control unit (16), and regulating the flow of the gas.