Green brick gas-exhaust mechanism and method controlled by volume cylinder

Abstract

The invention discloses a green brick gas-exhaust mechanism controlled by a volume cylinder. The green brick gas-exhaust mechanism comprises a main oil cylinder, wherein a main accommodating cavity is arranged in the main oil cylinder; a piston rod assembly is arranged in the main accommodating cavity; the piston rod assembly is used for dividing the main accommodating cavity into an upper cavity and a lower cavity; the upper cavity is connected to an upper oil tank; the lower cavity is connected to a control oil path; the lower end of the piston rod assembly extends out of the main accommodating cavity and is connected to an upper mould core; the control oil path comprises a gas-exhaust control oil path; the gas-exhaust control oil path is provided with the volume cylinder; and the volume cylinder is used for introducing hydraulic oil with predetermined volume into the lower cavity or discharging the hydraulic oil with predetermined volume to the outside of the low cavity, so that the upper mould core ascends or descends by a predetermined distance. The invention further discloses a green brick gas-exhaust method controlled by the volume cylinder. The green brick gas-exhaust mechanism and the green brick gas-exhaust method can precisely control the lifting height of the upper mould core, so that a gap between the upper mould core and a green brick is a constant value, and inside and outside gas pressure difference of the green brick is also a constant value, and therefore, the molding quality of the green brick is improved.

Description

technical field [0001] The invention relates to the technical field of ceramic production, in particular to a brick adobe exhaust mechanism and method controlled by a volumetric cylinder. Background technique [0002] The adobe forming process of the ceramic tile press is: filler—>press—>exhaust—>…—>press—>out. Depending on the properties of different powders, pressing and degassing may need to be repeated several times. During the compression process of the adobe, its internal space decreases. According to the gas state equation, the gas pressure in the adobe increases; when the pressure is removed and the upper mold core is lifted, if the pressure difference between the inside and outside of the adobe is large, the high-pressure gas will make the adobe The adobe bursts and delaminates and is scrapped. The purpose of pressing and exhausting in multiple times is to reduce the compression amount of a single pressing, that is, to reduce the pressure generated ...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the prior art is that it is difficult to control the lifting height and speed of the upper mold core stably and accurately, that is, it is difficult to control the pressure difference between the inside and outside of the adobe during the exhaust process; when the working conditions change, the lifting of the upper mold core If the speed is too fast or the air pressure in the adobe is too high, the pressure difference between the inside and outside of the adobe will be too large, that is, the adobe will be cracked and delaminated, and it will be scrapped; in the case of poor powder, the adobe cannot even be shaped

At present, the usual solution is to compress and exhaust multiple times, that is, to reduce the compression amount of a single adobe, that is, to reduce the gas pressure in the adobe, but this will lead to a decrease in output and an increase in energy consumption.

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