JPS6229105B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a powder coating device that forms a coating on the surface of powder or granules.

The purpose is to make the powder flow turbulently under reduced pressure while spraying the liquid and drying it, thereby saving labor in coating work, making the coating uniform, and reducing quality and potency. The purpose of the present invention is to provide a new skin application device that does not cause problems.

The present invention will be specifically described below based on embodiments shown in the drawings.

The skin applicator of the present invention includes a rotary drive device 13 for rotating a rotary drum 2 disposed on a shaft bearing on a machine base 1, a rotary drive device 13 for rotating it forward or reversely, a depressurizing means 4 for depressurizing the inside of the drum, and a rotary drive device 13 for rotating the rotary drum 2 with a shaft bearing on a machine base 1, a depressurizing means 4 for depressurizing the inside of the drum, and On the other hand, a spraying means 5 for spraying an arbitrary liquid for film formation is provided. On the upper surface of the machine stand 1, a bearing rack 11 having a bearing at the upper end and rollers 12, 12 are arranged at symmetrical positions in front of the bearing rack 11, and the rear cylindrical portion 23 of the drum 2 is supported on the bearing rack 11. is supported on rollers 12, 12 to allow free rotation. The rotating drum 2 is a rotary drive device that can rotate in forward and reverse directions, and has a drum main body 21 having a cylindrical shape with an open front and a bottom.The opening surface of the drum body 21 is sealed with a door 22, and a bearing cylinder 23 is provided inside the machine base 1. It is connected to 13. The drum body 21 and door 22 are
The heat medium circulation passage 24 has a double wall structure, respectively.
24, and a flexible tube 26 is provided at the hinge part 25 for communication, and a pump 33 and a cooler or heater 24 are connected between the inlet 27 and outlet 28 of both passages 24, 24. The heating means 35 is configured to cool or heat the entire wall surface and maintain the inside of the drum at a constant temperature at an arbitrarily set temperature depending on the powder and coating raw material liquid. In addition, a powder input/extraction port 29 is provided at the appropriate location of the drum 2 and sealed with an opening/closing door, and on the inside of the drum there is a bulge 30 with a constant height and length extending around the center of rotation of the drum. A rake-up buff full 31 is attached, and a notch 32 is provided at the base end of the buff full 30 at an appropriate location to create a stirring and turbulent flow effect for the powder. Next, the pressure reducing means 4 inserts the fixed pipe 4 into the rotating cylinder part 23 of the drum 2 via the sealing material 41.
2 is introduced, its tip is communicated with the space inside the drum 2 via the filter 43, and its base end is connected to the suction pump 4.
Connected to 4. The spraying means 5 is connected to the fixed pipe 4
Insert the flow pipe 51 into the drum 2 and connect its tip to the drum 2.
A variable diameter nozzle 52 is attached to the inside space so as to be able to change its direction, and its base end is connected to a liquid tank 54 via a pump 53.

However, when applying the powder, one or several types of powder forming the main raw material are stored in the rotary drum 2 by suction or other methods through the inlet 29 and sealed, while the liquid tank 54 is filled with the coating material. When the rotary drive device 13 is operated after containing the forming liquid, the drum 2 rotates at a constant speed at a set speed, and at this time, a part of the powder in the drum is subjected to the conveying action of the buffle 30. Some parts are not subjected to the conveying action at the notch 32, and at the bottom of the drum there is a raking buttful 3.
1 and falls, exhibiting mixing, agitation, and turbulent flow conditions. Next, the pressure reducing device 4 is operated to reduce the pressure inside the drum 2 to a pressure suitable for applying powder, and then the spraying means 5 is operated. By the operation of the pump 53, the liquid in the liquid tank 54 passes through the flow pipe 51 and is injected from the nozzle 52, and adheres to the entire surface of each powder in the turbulent flow.Since the pressure inside the drum 2 is reduced, the liquid is quickly dried. By repeating the injection and pause intervals for appropriate times, a film of constant thickness is formed on the powder surface. After the spraying is completed, the pressure inside the drum 2 is set to a pressure suitable for drying, and the heating means 35 is activated to circulate hot water, for example, to the passages 24, 24 of the drum body 21 and the door 22. The powder is efficiently and stably dried by the heating action under reduced pressure.

In addition, the present invention provides one or more spraying means 5a having substantially the same structure as the above-mentioned spraying means 5 to the rotating drum 2, and sprays fluid and powder onto the powder of the main raw material in the drum. By alternately and repeatedly spraying, a multilayer coating can be easily formed.

As described above, the present invention connects the depressurizing means 4 and the spraying means 5 to the rotary drum 2, and sprays a liquid under reduced pressure conditions while causing a turbulent flow of the contained powder, and the liquid is subjected to vacuum drying under reduced pressure. Because it was made to form a membrane by action,
In particular, application of fine powder becomes possible. However, since the process is carried out under reduced pressure, the quality and potency of the powder and liquid are not degraded at all, and the invention has the effect of achieving the purpose of the invention.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view, and FIG. 2 is a sectional view taken along line A--A in FIG. DESCRIPTION OF SYMBOLS 1... Machine base, 13... Rotation drive device, 2... Rotating drum, 35... Pressure reduction means, 4... Heating means,
5... Spraying means, 51... Distribution pipe, 52... Nozzle, 53... Pump, 54... Liquid tank.

Claims (1)

[Claims] 1 A bearing is provided on the machine base, and an input port with a lid is placed in the appropriate place.
A rotating drum with a buttful on the inner surface and a cooling or heating means on the wall, a rotational drive device connected to the drum, a decompression means connected in communication with the inside of the drum, and a rotating shaft inside the drum. A powder coating device that mainly consists of a nozzle at the tip of a flow pipe inserted into the drum and a spraying means connected to a liquid tank at the base end via a pump.