KR19990009810A - Adhesion Method of Ferrite Electromagnetic Wave Absorber - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adhering a ferrite radio wave absorber, and more particularly, a ferrite constituting a radio wave absorber provided to form a desired space from radio waves to a pseudo free space using ferrite, which is a magnetic material. In a method of adhering a block and a panel to each other, a method of adhering a ferrite radio wave absorber for adhering the ferrite block 20 and the panel 22 by using the bond 30, wherein a plurality of bond inlets 28 are formed. Bond 30 is introduced into bond inlet 28 while screen 24 is in close contact with panel 22 while screen 24 is in close contact with panel 22. After the screen 24 is separated, the ferrite block 20 is bonded to the panel 22 coated with the bond 30, thereby providing a method of adhering the ferrite radio wave absorber, the silk printing operation And the screen adhesion method using the principle of coplanarization, the desired adhesion position of the bond and the bond adhesion pattern can be uniformly applied, an appropriate amount of bond can be applied, and in particular, the time required for application of the ferrite radio wave absorber improves productivity. It is related with the adhesion method of.

Description

Adhesion Method of Ferrite Electromagnetic Wave Absorber

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of adhering ferrite radio wave absorbers, and in particular, ferrite blocks and dielectrics that constitute radio wave absorbers provided to form desired spaces from radio waves to pseudo free space using ferrite, which is a magnetic material. The present invention relates to a method of adhering a ferrite radio wave absorber, which bonds a panel to a desired position and a desired amount by using a screen when the phosphorous panel is bonded to each other by a bond, and then attaches a ferrite block.

As electronic devices become smaller and lighter, and the use of radio waves expands, the radio wave environment deteriorates significantly. This deterioration of the electromagnetic wave environment causes radio reception problems and malfunctions of electronic equipment or emits harmful electromagnetic waves. In addition to the harmful effects that can interfere with the interoperability of the devices.

EMI filters, shielding agents, ferrite beads, and radio wave absorbers are used as countermeasures against harmful electromagnetic waves.

The electromagnetic wave absorber is a material designed to absorb incident electromagnetic waves and have a reflection coefficient below a specific value. The electromagnetic wave absorber may be composed of a conductive loss material, a dielectric loss material, a magnetic loss material, and the like. Has been widely used to form a pseudo free space (hereinafter referred to as a radio darkroom) due to its excellent performance.

These ferrite radio wave absorbers can be divided into sintered type and composite type according to the constituent form.In general, the composite ferrite radio wave absorber mixes and manufactures ferrite powder and rubber or organic material as a support material, and mainly has excellent radio wave absorption performance in GHz band. On the other hand, the sintered ferrite wave absorber mainly uses Ni-Zn-based ferrite or Mn-Zn-based ferrite and has excellent radio wave absorption characteristics in the MHz band.

Ferrite radio absorbers used in radio darkroom should have excellent frequency absorption performance of 40MHz-1GHz.

In order to satisfy these characteristics, the shape of the radio wave absorber has been constructed in the form of pyramid, lamination and lattice, etc. Among them, the pyramidal wave absorber is formed by installing a urethane pyramid on the one-layered ferrite wave absorber and having a thickness of about 1m. Due to being too thick, the area of the effective radio darkroom becomes narrow when the radio darkroom is constructed.

On the other hand, the laminated wave absorber is a structure in which a ferrite block and a panel of dielectrics are laminated, which has excellent radio wave absorption characteristics, but is difficult to manufacture, and has a disadvantage of being thick, so that the area of the effective radio wave darkening chamber is narrowed when constructing the wave darkroom. The same as above.

In order to solve the above problems, a lattice type electromagnetic wave absorber has been devised.

The structure of the lattice wave absorber will be described with reference to FIG. 1.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a state where a lattice wave absorber is provided and a main portion.

The ferrite block 20, in which a plurality of square holes 32 are formed horizontally and vertically, and the panel 22, which is a dielectric, are adhered by the bond 30 to form the radio wave absorber 10.

The grid-shaped radio wave absorber 10 has a thickness of only about 2 cm, and the effective area is large when constituting the radio darkroom, and the ferrite block 20 is configured in the horizontal and vertical directions, Excellent absorption characteristics for incident electromagnetic waves.

Referring to the conventional method of adhering the radio wave absorber, the panel 22 is placed on a jig, and the bond 30 is applied to the entire surface of the panel 22 using a comb, etc., to a predetermined thickness, and then the ferrite block 20 is applied. To the panel 22 and left in a natural state for about 12 hours to cure naturally.

At this time, a bond of rubber heat having high viscosity is used.

However, the conventional adhesive method has a problem that the bond to the place where the bond does not need to be excessive, the amount of the bond is excessively excessive, and the time required for coating is reduced, resulting in poor productivity and making the bond adhesion pattern constant.

The present invention has been made to solve the above-described object is to provide a screen adhesion method using the principle of silk printing and co-printing can be consistently applied to the desired adhesion position and bond adhesion pattern of the bond and appropriate bond The present invention provides a method of adhering a ferrite radio wave absorber, which can apply an amount and in particular, a time required for application is shortened, thereby improving productivity.

In order to achieve the above object, the present invention provides a method of adhering a ferrite wave absorber to bond a ferrite block and a panel by using a bond, wherein a bond is introduced into a bond inlet in a state in which a plurality of screens having bond inlets are in close contact with the panel. After the screen is separated and the ferrite block is bonded to a panel coated with a bond to provide a method for adhering the ferrite radio wave absorber.

1 is a state in which the lattice-shaped radio wave absorber is installed and the main portion extract perspective view;

2 is a plan view showing one embodiment of a screen according to the present invention;

3 is a front sectional view showing a screen sticking method according to the present invention;

Figure 4 is a front sectional view showing an embodiment of the radio wave absorber completed according to the present invention.

Explanation of symbols for the main parts of the drawings

10; radio wave absorber, 20; ferrite block,

22; panel 24; screen,

26; Squeeze, 28; bond inlet,

30, bond, 32; square ball.

The present invention will be described with reference to the accompanying drawings, Figures 2 to 4 as follows.

Figure 2 is a plan view showing an embodiment of the screen according to the invention, Figure 3 is a front sectional view showing a screen sticking method according to the present invention, Figure 4 shows an embodiment of a complete wave absorber according to the present invention Front section view.

First, referring to the basic configuration of the present invention, in the method of adhering the ferrite radio wave absorber for adhering the ferrite block 20 and the panel 22 using the bond 30, the screen 24 having a plurality of bond inlets 28 is formed. ) Injecting the bond 30 into the bond inlet 28 in a state in which it is in close contact with the panel 22, and then leaving the screen 24, and then applying the ferrite block 20 to the panel 30 to which the bond 30 is applied. It is characterized by sticking to.

In addition, the screen 24 is characterized in that the PVC material.

In addition, the bond 30 is introduced into the bond inlet 28 using the squeeze 26.

Hereinafter, the present invention will be described in more detail. The adhesive method according to the present invention is different from the conventional adhesive method, but the conventional bond 30 is directly applied to the panel 22. However, in the present invention, the silk printing operation and the coplanarization The screen 24 using the principle is applied to the panel 22 through the bond inlet 28 formed in the screen 24 in a state in which it is in close contact with the panel 22.

A plurality of bond inlets 28 are formed in the screen 24 with the desired bond adhesion pattern and in accordance with the adhesion position of the panel 22.

In this case, as shown in FIG. 2, the bond adhesive pattern may have various patterns such as a circle, a rod, a rectangle, a triangle, and the like, which eventually becomes a shape when the bond inlet 28 is viewed in plan view.

The panel 22 is placed on the jig and the screen 24 on which the bond inlet 28 is formed is brought into close contact with the panel 22, and the adhesion position of the panel 22 and the bond inlet 28 coincide with each other.

The bond 30 is placed on the screen 24 and the squeeze 26 is reciprocated back and forth or left and right until the bond inlet 28 is filled with the bond 30 in the bond inlet 28. Put it in.

The reciprocating operation of the squeeze 26 may be performed manually or by using a robot.

Next, the screen 24 is detached from the panel 22.

In this case, when the material of the screen 24 is made of PVC, the amount of the bond 30 of the bond inlet 28 buried in the screen 24 is very small when the screen 24 is separated.

Bonding the polite block 20 to the panel 22 to which the bond 30 is applied, and then left in a natural state for about 12 hours, the bond 30 is cured to complete the adhesion.

As described above, the present invention is a screen sticking method using the principle of silk printing and co-printing, in particular, if the desired adhesion position and bond adhesion pattern of the bond can be uniformly applied, and an appropriate amount of bond can be applied, It is a useful invention that the time taken is shortened and productivity is improved.

Claims (3)

In the method of adhering the ferrite radio wave absorber to bond the ferrite block 20 and the panel 22 by using the bond 30, the screen 24 having a plurality of bond inlets 28 is closely attached to the panel 22. The ferrite propagation, characterized in that the bond 30 is put into the bond inlet 28 and then the screen 24 is separated and then the ferrite block 20 is adhered to the panel 22 coated with the bond 30. Adhesive method of absorber. The method of claim 1, wherein the screen 24 is made of PVC. The method of adhering a ferrite radio wave absorber according to claim 1 or 2, wherein a bond (30) is introduced into the bond inlet (28) using a squeeze (26).