Patent EP-2712847-A1 (EP)
Inventor: LESCHE KLAUS
IPC: C03B7/08
Filed: 2013-09-25
Abstract: Portioning device (10) for molten glass, comprises (a) an inlet side pipe section (13) which at a first end is fixable to a glass reservoir from which the portioning device is suppliable with molten glass, (b) at least one volume variable section (15) which is connected with a second end of the inlet side pipe section and whose inner volume is variable, (c) an outlet side pipe section (17) which at a first end, is connected with the volume variable section, and comprises an outlet opening (27) arranged at its second end, through which a predefined amount of the molten glass is discharged. Portioning device (10) for molten glass, comprises (a) an inlet side pipe section (13) which at a first end is fixable to a glass reservoir from which the portioning device is suppliable with molten glass, (b) at least one volume variable section (15) which is connected with a second end of the inlet side pipe section and whose inner volume is variable, (c) an outlet side pipe section (17) which at a first end, is connected with the volume variable section, and comprises an outlet opening (27) arranged at its second end, through which a predefined amount of the molten glass is discharged. The inlet side pipe section, the volume variable section, and the outlet side pipe section form a flow channel for the molten glass. Independent claims are also included for: (1) a portioning system for molten glass, comprising a glass reservoir, and the above portioning device which is fixed to the glass reservoir; and (2) portioning the molten glass, comprising (ia) providing the portioning device having the volume variable section, (iia) introducing the molten glass from the glass reservoir into the portioning device, and (iiia) carrying out a relative movement between the inlet side- and the outlet side pipe sections, where (A) a relative movement of the inlet side pipe section and the outlet side pipe section towards each other, decreases the inner volume of the volume variable section and a relative movement of the inlet side pipe section, and the outlet side pipe section apart from each other, increases the inner volume of the volume variable section, (B) the increase in the inner volume of the volume variable section causes a suction effect in the portioning device such that the molten glass is withdrawn from the glass reservoir, and (C) the decrease in the inner volume of the volume variable section causes discharging of a predefined amount of the molten glass from the outlet opening of the outlet side pipe section, or (ib) providing the portioning device having two movable volume variable sections, where the outlet side- and the inlet side- pipe sections are immovably arranged, (iib) introducing the molten glass from the glass reservoir into the portioning device, and (iiib) carrying out a relative movement of intermediate pipe section in a direction towards the inlet side pipe section and the outlet pipe section, where (D) a relative movement of the intermediate pipe section towards the inlet side pipe section, decreases the inner volume of the first volume variable section and increases the inner volume of the second volume variable section, and a relative movement of the intermediate pipe section towards the outlet side pipe section, increases the inner volume of the first volume variable section and decreases the inner volume of the second volume variable section, (E) the increase in the volume of the volume variable section, at least regionally causes suction effect in the portioning device, such that the molten glass is withdrawn from the glass reservoir into the first volume variable section and/or the molten glass which is already present in the portioning device, is withdrawn into the second volume variable section, and (C) the decrease in the volume of the volume variable section at least regionally causes a pumping effect in the portioning device such that the molten glass is pressed in a direction towards the outlet opening.