JPS61420A - Magnetic filter material and preparation thereof - Google Patents

Abstract

PURPOSE:To collect a fine powder having magnetism such as an iron powder with good efficiency in filtering, by enveloping a magnetic material in a filter material. CONSTITUTION:A cut porous tape shaped filter material 2 wound around a bobbin 4 is fed out while the bobbin 4 is rotated and passed between a pair of folding rolls 5a, 5b to be folded double and opened so as to have a V-shaped cross- sectional area. Herein, a powdery magnetic material 6 is continuously charged in the recessed parts of the filter material 2 and the upper parts of the V-shaped walls of the filter material 2 are bent through the next folding rolls 7a, 7b to envelope the magnetic material by the filter material 2. Next, the filter material 2 is passed through a taper cone 8 to squeeze the filter material 2 having the magnetic material 6 enveloped therein and passed through the magnetic field formed by permanent magnets 9a, 9b to magnetize the magnetic material 6 to form a magnetic body 3. A wind-up drum 11 rotating by an electromotor 10 is further rotated by a twisting electromotor 12 to impart twist to the magnetic filter material 1 while winding up the same.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a magnetic filter material used for fluid filtration in oil cleaners and the like, and a method for manufacturing the same.

[Conventional Technical Background] A filter medium used when filtering a fluid generally has sieve-like properties for trapping impurities in the fluid.

However, contaminants often contain fine magnetic powder such as iron powder due to wear of mechanical equipment, and among these, ultrafine magnetic powder that cannot be captured by the magnetic filter medium is Removal is possible by combined use.

However, it is extremely difficult to uniformly distribute powdery magnetic material on a filter medium such as filter paper or nonwoven fabric because the magnetic material becomes lump-like. Therefore, it is conceivable to distribute unmagnetized magnetic material on the filter medium and then magnetize the magnetic material, but this would require considerably large-scale equipment to uniformly magnetize the material.

[Objective of the Invention] The object of the present invention is to provide a magnetic filtration material that solves the two problems, envelops a magnetic substance in a filter medium, and can efficiently capture magnetic fine powder such as iron powder during filtration. It's about doing.

Another object of the present invention is to provide a method for manufacturing magnetic filtration materials that can efficiently manufacture two sets of magnetic filtration materials.

"Summary of the Invention" - The gist of the specific invention for achieving the above-mentioned object is to continuously enclose a magnetic material made of powder or granules through a filter medium made of porous tape-like paper or non-woven fabric. , a magnetic material characterized by being formed into a thread or rope shape.
The gist of the present invention related to the above-mentioned specific invention is a filtration process consisting of a porous tape-shaped paper or non-woven fabric, and a non-magnetized filter material consisting of powder or granules in the concave portion of the filter medium. a second step of continuously dropping the magnetic material; a third step of continuously wrapping the magnetic material in the filter medium; a fourth step of twisting the filter medium wrapped around the magnetic material; 2 or 3 or a fifth step of magnetizing the magnetic material after the fourth step.

[Embodiments of the invention] The present invention will be explained in detail based on illustrated embodiments.

1 and 2 show a magnetic filter material 1, with FIG. 1 being a side view and FIG. 2 being a cross-sectional view. This magnetic filtration material 1 consists of a tape-like air-permeable or water-permeable filter medium 2 made of paper or non-woven fabric, and a powder-like magnetic material 3 made of, for example, alnico or ferrite, wrapped around it. It has a twisted thread or rope shape.

Figure $3 and the following are explanatory diagrams of the method of manufacturing this magnetic filtration material 1. In FIG. 3, a tape-shaped filter medium 2 cut to a width of 50 mm, for example, and wound around a bobbin 4 is placed on a hobbin 4.
is sent out while rotating, and a pair of folding rolls 5a, 5
Pass through b. The filter medium 2 is folded in half by the folding rolls 5a, 5b as shown in FIG.
When the filter medium 2 passes through point b, it expands into a V-shaped cross section as shown in FIG. 5 due to the elastic force of the filter medium 2 itself. Here, in the recess of the filter medium 2,
For example, unmagnetized powdered magnetic material 6 is continuously charged from a measuring hopper (not shown) and passed through the next folding rolls 7a, 7b. These folding rolls 7a and 7b are
This is to cover the magnetic material 6 by folding a part of the filter medium 2 which has expanded into a V-shape from both sides. As shown in FIG. 6, the upper part of the filter medium 2 is bent, and the magnetic material 6 is wrapped in the filter medium 2. Next, the filter medium 2 enclosing the magnetic material 6 is squeezed through the tapered cone 8 as shown in FIG. 7, and its diameter is regulated to, for example, 3 mm. Subsequently, the magnetic material 6 is magnetized to form the magnetic body 3 through a magnetic field formed by the permanent magnets 9a and 9b. and,
A winding drum 11 rotated by an electric motor 10 is further rotated by a twisting electric motor 12 to twist the magnetic filter material 1 while winding it up, so that the magnetic material 3 is in a mechanically stable state without coming loose. .

As mentioned above, it is sufficient to use a sieve-like so-called filter medium to remove large solid particles from the fluid.

However, it is necessary to magnetically adsorb fine iron powder, etc. in the fluid, and by incorporating the magnetic material 3 into the filter medium 2 as in the present invention, this magnetic filter material 1 can absorb fine iron powder in the oil. It has the ability to remove iron powder, etc.

When this magnetic filter material 1 is actually used, it can be applied to an oil cleaner 13 as shown in FIG. 8, for example. The outer container 14 of this oil cleaner 13 is a cylindrical metal tube, and has an oil inlet 15 and an outlet 16 on the "-" face. Inside the outer container 14, a filter main body 17 is supported by a spring 18, and this filter main body 17 has a bottom plate 19 that does not allow oil to pass through, a closing plate 20, a cylindrical outer wall 21 that allows oil to pass through, and a cylindrical inner wall 21. It is surrounded by 22. Bottom plate 19 and closure plate 20
For example, cylindrical outer wall 21 and inner wall 2 are made of a rigid metal plate.
2 is, for example, a wire mesh or a porous metal plate, such as punched metal. - The overwater body 17 is formed of the magnetic overflow material 1 according to the present invention, and is wound around the cylindrical inner wall 22 as a core. In this case, it is preferable that the winding is done more tightly near the inner cylindrical wall 22, that is, at the beginning of the winding, and more loosely as the winding progresses toward the outside. The reason for this is that oil passes from the oil inlet 15, through the cylindrical outer wall 21, through the transit body 17, and then through the cylindrical inner wall 22, so that the impurities with different particle sizes in the oil are mainly filtered on the upstream side of the filter body 17. captures large contaminants,
This is because if particles of small size are captured on the downstream side, the life of the filter body 17 as a whole becomes longer.

Also, magnetic filtration material lt- can be knitted or woven.
A1. -F#j: a>m back, □ Yoyoo. Yo1
゜It can be used as a cloth or as an adsorption cloth for magnetic powder.In addition, in the embodiment, when winding up the filter medium 2, the winding drum 11 is rotated to give twist, so that the completed magnetic filter The length of the material 1 is almost the same as the length of the original tape-shaped filter medium 2. However, when wrapping the magnetic material 6, the filter medium 2 may be twisted in a helical manner, and in this case, the completed magnetic filter material 1 is attached to the original filter medium 2.
will be shorter than the length of.

[Effects of the Invention] As explained above, in the magnetic filtration material and the manufacturing method thereof according to the present invention, the magnetic material is evenly distributed in the filter material, and the magnetic material in the fluid is uniformly magnetized. The advantage is that a magnetic filtration material capable of good capture can be obtained and its manufacture can be facilitated.

[Brief explanation of the drawing]

The drawings show examples of the magnetic filtration material and the method for manufacturing the same according to the present invention, FIG. 1 is a side view of the magnetic filtration material, FIG. 2 is a cross-sectional view thereof, and FIG. Explanatory drawings, Fig. 4 is a cross-sectional view of the filter medium being folded with a folding roll, Fig. 5 is a cross-sectional view of the filter medium after passing through the folding roll, and Fig. 6 is a cross-sectional view of the filter medium being folded with a folding roll. , 7th
The figure is a sectional view of the filter medium after passing through the cone, and FIG. 8 is a sectional view of the oil cleaner. Symbol l is a magnetic filter material, 2 is a filter medium, 3 is a magnetic material, 4 is a bobbin, 5a, 5b are folding rolls, 6 is a magnetic material, 7a,
7b is a folding roll, 8 is a cone, 9a and 9b are permanent magnets, 10.12 is an electric motor, 11 is a winding drum, 13
is an oil cleaner.

Claims (1)

[Claims] 1. A magnetic material made of powder or granules is continuously wrapped in a filter material made of porous tape-shaped paper or nonwoven fabric,
A magnetic filtration material characterized by being formed into a thread or rope shape. 2. A first step of continuously feeding out a filter medium made of porous tape-shaped paper or nonwoven fabric to form a concave cross-section, and placing a non-magnetized magnetic material made of powder in the concave portion of the filter medium. a second step of continuously dropping the magnetic material, a third step of continuously wrapping the magnetic material with the filter medium, a fourth step of giving twist to the filter medium wrapped around the magnetic material, A method for manufacturing a magnetic filtration material, comprising a fifth step of magnetizing the magnetic material after the third or fourth step. 3. The method for manufacturing a magnetic filtration material according to claim 2, wherein the first step and the third step are performed using rotating rolls. 4. The method for manufacturing a magnetic filtration material according to claim 2, wherein the fifth step is performed by passing the material through a magnetic field.