Air knife width changing device having excellent operation efficiency

Abstract

The present invention provides an air knife width changing device having excellent operation efficiency, comprising: driving members (100) provided at both sides of an air knife (10); and a blocking member (200) for adjusting a blocking range of a spraying hole (11) while moving inward or outward in the longitudinal direction of the air knife by the operation of the driving members, wherein, when viewing the air knife in a planar state, the blocking member (200) has a front end portion (210) of which one end is fixed to the outer side of the air knife so as to move outward or inward along the longitudinal direction inside the spraying hole, thereby adjusting the blocking range of the spraying hole, and a rear end portion (220) circulating from the other end of the front end portion (210) toward the outer side of the air knife so as to be connected to the driving member (100).

Description

technical field [0001] The present invention relates to a variable width device of an air knife, and more specifically relates to a variable width device of an air knife with excellent operating efficiency that flexibly moves a blocking member to the air knife while minimizing high-pressure gas and collision resistance The inner and outer sides can greatly improve the injection efficiency of high-pressure gas. Background technique [0002] In general, the variable width device of the air knife utilizes various shapes of blocking members for adjusting the injection range of the high-pressure gas injected by the air knife. [0003] However, in the case of the antenna-shaped blocking member in the prior art, a step difference occurs at a portion where a plurality of circular tubes contact each other, not only vibration occurs at the same time as the high-pressure gas collides, but also the diameters of the multiple circular tubes are different from each other, so There is a se...

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Problems solved by technology

[0003] However, in the case of the antenna-shaped blocking member in the prior art, a step difference occurs at a portion where a plurality of circular tubes contact each other, not only vibration occurs at the same time as the high-pressure gas collides, but also the diameters of the multiple circular tubes are different from each other, so There is a serious problem of not being able to completely block the high-pressure gas

[0004] In addition, in the case of the blocking member having a plate shape in the prior art, high-pressure gas does not pass naturally but collides with the surface to generate resistance and eddy current at the same time, so there is a problem that serious vibration and noise are generated

[0005] At the same time, in the recent use of a circular cross-section and elastic blocking member, but this moves inward or outward during the injection of high-pressure gas, because the resistance that occurs simultaneously with the collision with high-pressure gas limits the flexible movement, there is a possibility that it cannot The problem of accurately adjusting the injection range of high-pressure gas

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