Nisshin Engineering Co., Ltd.

Other

Nisshin Flour Milling Co., Ltd.

Shin Doi

Masaki Ban

Yukiyoshi Yamada

Goro Watanabe

Masayuki Yasuguchi

The present invention provides a finely-divided powder spray apparatus having a spray nozzle pipe for discharging finely-divided powders from the tip together with a gas stream, which is disposed at a prescribed distance from the member to be sprayed and inclined in a prescribed direction to the member; and a moving-speed control means which controls the moving-speed of the tip of the spray nozzle pipe in accordance with the quadratic function, which indicates the reduction rate of the density of the deposited finely-divided powders based on the distance between a peak point of the density of the finely-divided powders deposited on the member to be sprayed in a trial spray and a spray point at which an extension from the spray nozzle pipe intersects with the member to be sprayed.

Finely-divided powder spray apparatus

The present invention provides a finely-divided powder spray apparatus having a spray nozzle pipe for discharging spacers for liquid crystal displays from the tip together with a gas flow, which is disposed at a prescribed distance from a member to be sprayed, and comprising: a touch panel which enters control factors for controlling the moving-speed of the tip of the spray nozzle pipe at individual spray points the surface of the glass substrate; and an actuator driver which controls the moving speed of the tip of the spray nozzle pipe in accordance with the control factor entered by the touch panel.

A finely-divided powder spray apparatus of the invention comprises a spray nozzle pipe disposed at a position spaced apart from a member to be sprayed a prescribed interval; a support unit of the spray nozzle pipe for supporting it so that it can be inclined; a first joint unit disposed to the upper end of the spray nozzle pipe; two linearly-moving actuators that each move in respective linear paths that are fixed relative to each other and each provided with a second joint unit; and two rods for coupling each of the second joint units with the first joint unit; wherein the finely-divided powder is sprayed onto the member to be sprayed from the spray nozzle pipe which is inclined in an arbitrary direction by combining the movements of the two linearly-moving actuators. This spray apparatus is a smaller apparatus capable of spraying the finely-divided powder such as liquid crystal spacers onto a larger member to be sprayed such as a larger glass substrate and does not uselessly spray finely-divided powder to the periphery of a member to be sprayed by providing a drive mechanism for driving a spray nozzle pipe which has a larger spray angle, can move in a prescribed direction at a high speed, applies a uniform load on drive sources for driving the spray nozzle pipe and can change the center of the locus of a spray path along which the finely-divided powder is sprayed and the moving speed of the center of the locus.

In a powder classifier of the kind having a turbine-like horizontally rotating classifying rotor which is arranged to have air diametrically flow into radial passages and to cause the coarse powder portion of a powder material supplied to the inside of the radial passages to move to a circular passage encompassing the outer circumference of the rotor and the fine powder portion of the powder material to move diametrically toward the inside of the rotor, the circular passage has a discharge port formed in a part of the outer circumferential wall thereof. To the discharge port is connected a coarse powder discharge duct which approximately tangentially extends from the discharge port of the circular passage to a chute part arranged above a coarse powder recovering device; a powder return duct is connected to the chute part and extends approximately tangentially relative to the circular passage from the chute part to an opening provided in the outer circumferential wall of the circular passage. In cases where highly adhesive ultrafine powders are treated, at least either of the coarse powder discharge duct and the powder return duct is arranged to have an air stream blown thereinto in the passing direction of the powder.

Powder classifier

A powder disperser comprises a nozzle having a narrow discharge port for discharging a powder. A high speed air flow discharge port forms a narrow air port encompassing the outer circumference of the discharge port of the nozzle and is inwardly slanting at an acute angle relative to the discharge direction of a powder flow from the nozzle. A powder dispersing passage is narrowly formed on the downstream side of the nozzle in a circular tube like shape or in a radial shape along the outer wall surface continuing from the outer wall of the high speed air flow discharge port. The powder discharge passage is connected to the powder supply port of a classifier located downstream next to the disperser.

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Saitama, Japan

Shin Doi