Air-tight door and sealing method for large-scale additive manufacturing

Abstract

The invention discloses an air-tight door and a sealing method for large-scale additive manufacturing. The air-tight door comprises an inner door with inner side facing additive manufacturing space aswell as an outer door overlapping on the outer side of the inner door, wherein the outer door and the inner door are connected through a plurality of tensioning mechanisms, and the air-tight door further comprises a plurality of propping mechanisms located between the outer door and the inner door; the outer door can move along horizontal linear guide rails, and the length direction of the linearguide rails is perpendicular to the vertical line between the inner door and the outer door. Compared with the conventional hinged joint sealing mode for manually pushing the air-tight door to rotatearound a rotating center, the opening-closing efficiency can be increased remarkably, time wasted in opening or closing the air-tight door can be reduced, the problem of poor sealing effect when therotating center is too far from a communication part in the prior art is solved, the problem that the sealing effect of the hinged joint type air-tight door and the opening-closing speed are in negative relationship in the prior art is solved, and the sealing effect and the opening-closing efficiency are guaranteed simultaneously.

Description

technical field [0001] The invention relates to the field of airtight doors, in particular to an airtight door and a sealing method for large-scale additive manufacturing. Background technique [0002] The additive manufacturing space needs to switch between a sealed environment and an open environment. The switching time is short, and the process is convenient and safe. This requires that the sealed door between the space and the outside world be well sealed, and the opening and closing process should be automated. To keep the additive manufacturing space sealed for a long time, it is necessary to continuously apply pressure to the airtight door. How to continuously and stably pressurize the airtight door and maintain the airtightness of the space is a typical technical problem. The fan-shaped airtight door in the prior art uses one point as the center of rotation to open and close the door. This mechanism has good sealing performance when the center of rotation is too clos...

AI Technical Summary

Problems solved by technology

The fan-shaped airtight door in the prior art uses one point as the center of rotation to open and close the door. This mechanism has good sealing performance when the center of rotation is too close to the space connection, but the movement resistance of the mechanism is large and it is inconvenient to move; When it is too far away, it is easy to move but difficult to seal the mechanism; at the same time, this mechanism occupies a large area

In addition, most of the existing airtight doors are sealed by the structure, and the structural seal cannot guarantee the good airtightness of the additive manufacturing space for a long time; and the opening and closing of the door requires manual push and pull, which has the problems of dangerous operation, long time consumption and inconvenient use

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