3results about How to "Uniform coating thickness" patented technology

This utility model discloses a surface spraying device for casting processing, including a base plate, a vertical plate fixedly connected to the base plate, a lifting mechanism on the vertical plate, an alternating feeding mechanism vertically fixedly connected to the lifting mechanism, and a paint mist collection mechanism opposite to the spraying device at the lower part of the device. This utility model solves the problem of maintaining a stable spraying distance and angle during manual spraying in the prior art by using a lifting mechanism and a second motor to drive the workpiece to rotate, resulting in uniform coating thickness and high spraying stability on the workpiece surface. The alternating feeding mechanism solves the problem of low efficiency in the prior art requiring machine stoppage for feeding, improving production efficiency while reducing labor intensity. The paint mist collection mechanism solves the problem of poor paint mist collection caused by the air intake being far from the workpiece in the prior art, improving paint mist collection efficiency and reducing environmental pollution.

This invention discloses a fertilizer coating device, belonging to the field of fertilizer coating technology. It includes a fluidizing chamber with a discharge port at the bottom, providing a coating area; a discharge chamber located at the bottom of the fluidizing chamber, with at least a portion of the fluidizing chamber located inside the discharge chamber; and a spraying element rotatably disposed inside the discharge chamber, comprising a conical surface; a first spray groove on the conical surface; and a second spray groove on the radial outer wall of the spraying element. When the conical surface blocks the discharge port, the spraying element sprays gas into the bottom of the fluidizing chamber through the first spray groove and into the side walls of the fluidizing chamber through the second spray groove. This invention utilizes a double-groove spraying element with a circulating airflow path to construct a three-dimensional fluidization field, combined with multi-nozzle atomization spraying at the top, resulting in uniform coating thickness and no missed spraying. The conical surface also functions as a sealing and guiding element. Precise cylinder lifting and positioning, reliable gear transmission, and a combination of rail groove fitting and elastic sealing structure ensure smooth, uninterrupted movement.

This invention discloses a control method and system for a high-temperature coating furnace for pyrolytic graphite, belonging to the field of material preparation and high-temperature heat treatment technology. It solves the problems of poor deposition uniformity, contradiction between deposition efficiency and quality, and poor process repeatability that exist in coating furnace control methods when preparing workpieces. The technical solution includes the following steps: The substrate to be deposited is placed in the furnace chamber of the high-temperature coating furnace for pyrolytic graphite and pretreated; the pretreated substrate is subjected to multi-stage variable temperature and flow rate deposition control to complete the deposition operation. The multi-stage variable temperature and flow rate deposition control includes four sub-stages performed sequentially: preheating and degassing, interface nucleation, stable growth, and final densification; after the deposition operation is completed, the substrate is cooled, and the substrate coated with pyrolytic graphite is removed. This invention is applied to coating furnaces.