JPH11309359A - Sand mil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clean a screen in a short time and to reduce labor by arranging a rotary ejection nozzle for ejecting a cleaning solvent on the inside of the screen. SOLUTION: In a cleaning mechanism 20, a rotary ejection nozzle 24 is arranged on the inside of a screen, and a cleaning solvent feeding piping 26 for supplying a cleaning solvent to the nozzle 24 is provided. Each of a lower part bearing 28, a rotor 30, an upper part bearing 32, and a bearing fixing seat 34 is connected in the axial direction of the nozzle 24, and the rotor 30 is supported rotatably by the connected lower part bearing 28 and the upper part bearing 32. In this state, a slit is formed in the rotor 30, the cleaning solvent is received from the piping 26, and a jet 25 sprayed outside in the radius direction is formed. In this way, the screen can be cleaned in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mixing a plurality of fluids, for example, a first fluid and a second fluid, using a particulate media and a fluid mixed with the particulate media by a screen. And a sand mill for separating the same.

[0002]

2. Description of the Related Art As a device for mixing a first fluid, for example, a high-viscosity paste and a second fluid, for example, a pigment, for example, there is a sand mill as disclosed in JP-A-10-5560. The sand mill mixes the first fluid and the second fluid using the particulate media in a vessel forming a sealed container, and the first fluid mixed with the particulate media by a screen. And the second fluid.

When mixing another fluid after using the sand mill, it is necessary to clean the inside of the sand mill.

Parts other than the screen can be cleaned relatively easily by supplying a cleaning solvent from the outside into the vessel through a supply port and discharging the residual fluid and the like together with the cleaning solvent through a discharge port. However, the screen cannot be properly cleaned only by supplying a cleaning solvent from the outside. For this reason, the screen was washed by disassembling the sand mill, removing the screen, and immersing the screen in a washing solvent, for example. Therefore, in a sand mill on a line where varieties are frequently changed, much time and labor are spent for cleaning the screen.

[0005]

According to the present invention, in order to solve the above-mentioned problems, a plurality of fluids are mixed using a particulate media, and a fluid mixed with the particulate media by a screen is used. A sand mill, wherein a rotary spray nozzle for spraying a cleaning solvent is disposed inside the screen.

According to the present invention, in order to reduce the cleaning time and labor, a cleaning nozzle is mounted inside the screen so that the cleaning can be performed without removing the screen from the sand mill, and the cleaning solvent is sprayed from the cleaning nozzle. The inside of the screen can be cleaned. The used cleaning nozzle is rotated by the reaction force of the flowing cleaning solvent.
0—Rotary injection nozzle that performs full-angle injection. With such a configuration, the inside of the screen can be entirely washed with one nozzle, and since the rotating nozzle does not use a ball bearing for rotation, there is no grease or oil that is unfavorable for paint.

It is a feature of this cleaning method that the inside of the screen is cleaned without using the rotary spray nozzle without disassembling and cleaning.

By adopting this cleaning method, conventionally, about 2
The screen can be cleaned in about 1 minute, which took 0 minutes.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sand mill according to a preferred embodiment of the present invention will now be described with reference to FIGS.

[0010] The sand mill includes a vessel that defines a closed container, a particulate media for mixing the first fluid and the second fluid, and a particulate media, the first fluid, and the second fluid. It has a stirring mechanism for mixing, and a screen mechanism 10 for separating the first fluid and the second fluid mixed with the particulate media. The Bessel or the like can have a configuration as described in the above-mentioned Patent Publication.

The screen mechanism 10 is disposed in a vessel defining a closed space, and includes a screen 11, a screen detachable pipe 12 supporting the screen 11, and a suction conduit 16, as shown in FIG.

In the vessel, after the particulate media, the first fluid, and the second fluid are mixed by a stirring mechanism,
By increasing the pressure in the vessel or the negative pressure in the suction conduit 16, the mixed first fluid and second fluid are separated from the outside of the suction conduit 16 by the screen 11.
To the inside of the suction conduit 16. The particulate media does not pass through the screen 11 because it is larger than the eyes of the screen 11.

Alternatively, a mixture of the first fluid and the second fluid may flow from the inside of the conduit 16 to the outside, leaving the particulate media inside the screen 11.

In this manner, the particulate media and the mixed first fluid and second fluid are separated.

The sand mill of the present invention has a cleaning mechanism 20 as shown in FIGS.

The cleaning mechanism 20 includes a rotary jet nozzle 24 disposed inside the screen 11 and a cleaning solvent feed pipe 26 for supplying a cleaning solvent to the rotary jet nozzle 24.

The rotary injection nozzle 24 includes a lower bearing 28, a rotating body 30, an upper bearing 32, and a bearing fixing seat 34.

The rotating body 30 is rotatably supported by a lower bearing 28 and an upper bearing 32. The bearing fixing seat 34 is, for example, screwed to the cleaning solvent feed pipe 26, and the lower bearing 28, the rotating body 30, and the upper bearing 32 are detachably installed on the cleaning solvent feed pipe 26.

A slit is formed in the rotating body 30 to receive the cleaning solvent from the cleaning solvent feed pipe 26 and generate a jet 25 sprayed outward in the radial direction. The jet to be sprayed has a desired shape by the shape of a slit formed in the rotating body 30 and the like.

The jet 25 has a circumferential component as well as a radial component. For this reason, the rotating body 30
When the jet 25 is sprayed, the jet receives rotation torque as a reaction of the jet 25, and thereby rotates. The rotation speed of the rotating body 30 depends on the pressure of the cleaning solvent supplied to the rotating body 30, the lower bearing 28 and the upper bearing 32, and the rotating body 30.
Is determined by the frictional force between them.

Since the sand mill of the present invention is configured as described above, when mixing another fluid after using the sand mill, if necessary, a fluid supply port provided in the vessel may be provided. Alternatively, the cleaning solvent is supplied from the cleaning solvent supply port to clean the inside of the vessel, the cleaning solvent is supplied through the supply liquid pipe 26 to the rotating body 30, and the cleaning solvent is sprayed from the rotating body 30 to clean the rotating body 30. The screen 11 is rotated to wash the screen 11. Thus, not only the inner wall of the vessel but also the screen 11 can be washed without disassembling the vessel.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A sand mill having a space capacity of 10 liters having the structure shown in FIG.
After dispersing 20 parts by weight of talc, 20 parts by weight of silica and 25 parts by weight of the solvent, 2 liters of thinner was sprayed with a jet pressure of 0.23 to wash the screen.
Injection was performed for 1 minute at mPa. The screen was completely cleaned.

On the other hand, after dispersing using the above-mentioned dispersion paste using a sand mill having no rotary injection nozzle for cleaning, the screen was removed and immersed in 10 liters of thinner to wash the brush. The time required for removing, disassembling, cleaning, assembling and installing the screen was 20 minutes.

[Brief description of the drawings]

FIG. 1 is a front view of a washing mechanism of a sand mill according to the present invention.

FIG. 2 is a partial cross-sectional view of the cleaning mechanism of FIG. 1 with a screen removed.

FIG. 3 is an exploded view of the rotary injection nozzle shown in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Screen mechanism 11 Screen 12 Screen detachable pipe 16 Suction conduit 20 Cleaning mechanism 24 Rotary jet nozzle 25 Jet 26 Cleaning solvent feed pipe 28 Lower bearing 30 Rotating body 32 Upper bearing 34 Bearing fixing seat

Claims (1)

[Claims] 1. A rotary mill in which a plurality of fluids are mixed using a particulate media and a sand mill separates the particulate media and the mixed fluid by a screen, in which a cleaning solvent is sprayed inside the screen. A sand mill having a nozzle.