JP2002018258A - Stirrer for electric/electronic instrument material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the mixing of a metal with a material to be treated even if the stirring blades and mixing blades rotated in a stirring tank are abraded when particles of a material used in an electric/electronic instrument are stirred in a solvent. SOLUTION: The whole of the stirring blades 1 and the mixing blades 23 is made of a virgin hard synthetic resin and the stirring blades 1 are formed to both sides on the outer peripheral side of a disc part 2 in a protruded state and edges 3a, 3b, 3c are formed to the end surfaces in the rotary direction of the blade parts 3 and particles of the material and a solvent are wholly mixed homogenously by the mixing blades 23 to strike the particles by the end surfaces of the stirring blades 1 to disperse the particles while finely dividing them. The mixing blades 23 mix the particles of the material and solvent in the stirring tank 12 to average a particle size of the particles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing particles used in electric and electronic equipment such as secondary batteries, plasma displays (PDPs) and capacitors under conditions that do not cause metal components to enter or cause metal contamination. The present invention relates to a stirrer used for atomizing and dispersing therein, in which a member which is liable to wear due to friction with a material to be treated is improved.

[0002] This stirrer is used for the secondary battery.
It is used for dispersing powders such as lithium cobaltate and carbon in an organic solvent such as NMP or acetone in which a resin such as VDF is dissolved.

[0003] Materials for plasma displays include materials for forming ribs (partitions) provided between a rear substrate and a front substrate, a phosphor layer, a protective layer, a transparent dielectric layer, and the like. In the rib (partition) material, fine powder of glass is dispersed in a vehicle liquid (a solvent such as a terpineol solution in which a resin is dissolved). For the phosphor material, the phosphor powder is dispersed in the vehicle liquid, for the protective layer material, magnesium oxide or the like is dispersed in the vehicle liquid, and for the material of the transparent dielectric layer, barium titanate or the like is dispersed in the vehicle liquid. Let it.

In capacitor materials (for dielectric filters and chip inductors), ceramic powder, glass powder, barium titanate powder, and the like are dispersed in water or an organic solvent.

[0005]

2. Description of the Related Art Conventionally, in order to stir each of the above materials,
In general, a material is supplied to a rotating drum containing chips of ceramics or metal, and the chips are dispersed or atomized by a stirring action generated by moving the chips by rotation of the drum.
However, according to this means, a long time is required for the treatment, and in the case of using a metal chip, there is a disadvantage that the object to be treated is contaminated with metal.

If a stirrer of a type in which a metal stirring blade is rotated at a high speed in a stirring tank is used, metal contamination is likely to occur, and even if a nonmetal coating is applied to the blade surface, the metal surface is exposed due to wear. And metal contamination may occur.

[0007]

If the electric / electronic equipment material is contaminated with metal as described above, the electrical properties become poor and the product cannot be commercialized. It is an object of the present invention to obtain a stirring means that does not cause the generation of the water and to obtain a means that can efficiently perform the treatment.

[0008]

According to one aspect of the present invention, a shaft mounting portion is provided at the center of a disk portion, and a blade is provided on an outer peripheral side of the disk portion. In the stirrer provided with a part and rotating at high speed in the stirring tank, the whole of the stirring blade is formed of pure hard synthetic resin or ceramics having high electrical insulation and abrasion resistance, and the material of the electric / electronic equipment is stirred in the stirring tank. And stirred. According to this means, the processing speed for dispersing or atomizing the material to be processed is fast and efficient, and no metal component is produced even when the stirring blade is worn, so that the material to be processed is not contaminated with metal.

Another means for solving the above-mentioned problems is that, as set forth in claim 2, a hard synthetic resin or ceramic stirring blade is rotated at a high speed in a stirring tank and a mixing blade is rotated at a low speed. In the stirrer which makes the distribution of the material to be treated uniform by making the whole mixing blade made of a hard synthetic resin or ceramic having high electrical insulation and abrasion resistance, the electric / electronic equipment material is stored in the stirring tank. And stirring. According to this means, the distribution of the material in the stirring tank is made uniform by the mixing blade, and the dispersion and the atomization action by the stirring blade are equalized. However, even if the stirring blade and the mixing blade are worn, no metal component is produced. No metal contamination occurs.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a stirring blade,
(A) is a front view, (b) is a longitudinal sectional view. Stirring blade 1
Is made of solid hard synthetic resin or ceramics, has a disk portion 2 and a blade portion 3, and has a positioning hole 4 and a screw hole 5 in the center of the disk portion 2. The blades 3 are provided in such a manner as to be alternately and symmetrically bent from the outer peripheral side of the disk portion 2 to both sides, and are formed so as to strike the material particles on the end face 3a facing the rotation direction. Examples of the wear-resistant hard synthetic resin include ultrahigh molecular weight polyethylene, nylon, polyacetal, and polypropylene, which will be described later.

FIGS. 2 to 4 show a stirrer 10 provided with the stirring blade 1, 11 is its main body, 12 is a stirring tank,
The stirring tank 12 is supported by a lifting arm 12a from below and is moved up and down. A beam 14 shown in FIG. 3 is provided integrally with the main body 11 in a cover 13 at an upper portion of the main body 11, and a mechanism for stirring and transmitting power is installed on this. A downwardly facing cylindrical body 15 is provided integrally with the beam 14, a fixed sun gear 16 is fixed to the outer surface thereof, and a cylindrical shaft 17 is supported inside. This cylindrical shaft 17
A bevel gear 18 is fixed to the upper part of the frame, and a planetary frame 19 is fixed to the lower part. One high-speed rotating shaft 20 and two low-speed rotating shafts 2 are mounted on the planetary frame 19.
1 is bearing.

A fixed frame 14a integral with the beam 14 is provided above the beam 14, and a central axis 22 passing through the inside of the cylindrical shaft 17 is supported between the upper end and the lower end of the planetary frame 19,
A gear 22a fixed to the central shaft 22 and a gear 20a fixed to the high-speed rotating shaft 20 mesh with each other, and a planetary gear 21a fixed to the low-speed rotating shaft 21 meshes with the fixed sun gear 16. The stirring blade 1 is fixed to the lower end of the high-speed rotating shaft 20, and the mixing blade 23 made of solid hard synthetic resin is fixed to the lower end of each of the two low-speed rotating shafts 21. The center shaft 22 is driven by a speed change motor 24 via a belt transmission mechanism 24a.
5 is driven via bevel gears 25a, 18;

In this stirrer 10, the inner surface of the stirring tank 12 and the head of the screw passing through the high-speed rotating shaft 20 and the screw hole 5 are covered with a hard synthetic resin having high electrical insulation.
The stirring blade 1 and the mixing blade 23 are made of a solid hard synthetic resin having high electrical insulation as described above, and a sharp edge is formed on the end face 3 a of the stirring blade 1.

In the agitator 10, when the motors 24 and 25 rotate, the high-speed rotating shaft 20 and the agitating blades 1
9, the high-speed rotation accompanying the rotation of the central shaft 22 is performed while the same revolution as the rotation of the rotation of the rotation shaft 9 is performed.
Fixed sun gear 1 while revolving the same as the rotation of planet frame 19
The low-speed rotation associated with the engagement between the planetary gear 6 and the planetary gear 21a is performed.

Therefore, the material to be treated is put into the stirring tank 12, and the stirring tank 12 is raised by the raising / lowering arm 12a to a position where the stirring blade 1 and the mixing blade 23 completely enter the stirring tank 12, and the motors 24, 25 are moved. When activated, the material particles are beaten and crushed by the edge by the high-speed rotation of the stirring blade 1, and the whole is mixed by the low-speed revolution and rotation of the mixing blade 23 to average the particle distribution, so that this action is continued. As a result, the particles can be atomized as a whole and can be evenly dispersed.

A hard synthetic resin is used for the stirring blade 1 and the mixing blade 23, and the stirring blade 1 has a diameter of 100 m.
m, a disk part 2 and a blade part 3 having a thickness of 2.5 mm are prepared and attached to a high-speed shaft 20 of a stirrer 10 to have a peripheral speed of 10 to 3 mm.
It was rotated at 0 m / sec. The materials for the blades 1 and 23 include ultra-high molecular weight polyethylene sold by Sakushin Kogyo Co., Ltd. under the brand name of "New Light" and nylon sold by Nippon Polypenco Co., Ltd. under the brand name of "MC Nylon" , And hard synthetic resins such as polyacetal and polypropylene were used, but the electrical properties of parts using the material treated by the stirrer 10 maintained the expected values.

The stirrer having the stirring blades 1 and the mixing blades 23 has been described above. However, it is also possible to perform processing by a stirring device having only the stirring blades 1 in the small-diameter stirring tank 12 and having no mixing blades 23. it can. However, from the viewpoint of the quality of the product, it is desirable to provide the mixing blade 23 regardless of the size of the stirring tank, and the material of the mixing blade 23 is made of a pure synthetic resin or ceramic having high electrical insulation and abrasion resistance similar to the stirring blade 1. Is used.

[0018]

As is apparent from the above description, according to the first aspect of the present invention, since a solid hard synthetic resin or ceramic is used for the stirring blade, the stirring blade is worn by stirring the material. Since the metal does not appear on the surface, the materials of the electric and electronic appliances are not contaminated with the metal. Hard synthetic resin has high abrasion resistance, so the life of stirring blades is extremely long.If the edges of the blades become round due to abrasion, the edges must be polished again and sharpened to maintain work efficiency. There is an effect that can be.
According to the second aspect of the invention, there is an effect that the mixing blades are not worn together with the stirring blades, and the material particles can be uniformly atomized without being contaminated with metal.

[Brief description of the drawings]

FIG. 1 is a front view and a longitudinal sectional view of a stirring blade of the present invention.

FIG. 2 is a perspective view of a stirrer.

FIG. 3 is a longitudinal sectional view of the same.

FIG. 4 is a longitudinal sectional view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Stirring blade 2 Disk part 3 Blade part 3a, 3b, 3c Edge 10 Stirrer 20 High-speed rotation shaft 21 Low-speed rotation shaft 23 Mixing blade

Continued on the front page (72) Inventor Haruo Shibuya 8-16-43 Ebie, Fukushima-ku, Osaka-shi, Osaka F-term (reference) 4G078 AA02 AA04 AA09 BA05 BA07 DA01 DA28

Claims (2)

[Claims] 1. A stirrer provided with a shaft mounting portion at the center of a disk portion, a blade portion provided on an outer peripheral side of the disk portion, and a high-speed rotation in a stirring tank. A stirrer for electric / electronic device materials, which is made of a solid hard synthetic resin or ceramic having high wear resistance, and stirs electric / electronic device materials in a stirring tank. 2. A stirrer in which a hard synthetic resin or ceramic stirring blade is rotated at a high speed in a stirring tank and a mixing blade is rotated at a low speed to make the distribution of the material to be processed uniform. A stirrer for electric and electronic equipment materials, wherein the material is made of a hard synthetic resin or ceramic having high electrical insulation and abrasion resistance, and the electric and electronic equipment materials are accommodated in a stirring tank and stirred.