JPH04258804A - Method for washing magnetic material - Google Patents

Abstract

PURPOSE:To sufficiently wash magnetic materials, such as head chips, without damaging these materials. CONSTITUTION:The head chips 17 are immersed into a washing liquid 16 in a container 15. These head chips 17 are rotationally moved by the change of the magnetic fields in the container 15 generated by rotation of a magnet 11. The head chips 17 are washed while the washing liquid 16 is kept stirred by the rotational motion.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning magnetic materials such as magnetic head chips.

0002

2. Description of the Related Art Conventionally, a method for cleaning a head chip of a magnetic head has been disclosed, for example, in Japanese Patent Application Laid-Open No. 14553/1983 (
There is a method shown in G11B 5/12) etc. In this conventional manufacturing method, as shown in FIG.
), and the wire receiver (3) is placed in the container (5) containing the cleaning liquid (4), and the ultrasonic cleaner (
6) was used to clean the head chip (1) for a predetermined period of time.

However, in this cleaning method, it is necessary to pass the wire through the winding hole of the head chip, and at that time, the wire comes into strong contact with the outer periphery of the head chip and the edge of the winding hole, causing the wire to pass through the winding hole. Cracks and chips occur around the parts, reducing yield. Further, even during ultrasonic cleaning, the head chips passed through the wire violently hit each other due to ultrasonic vibrations, and the wire and the head chip violently hit each other, resulting in many cracks and chips in the head chip. Furthermore, with this cleaning method, adjacent head chips come into close contact with each other, making complete cleaning impossible, and wax and adhesive remain between the head chips.
There is a risk of staining the head chip.

0004

SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned drawbacks of the conventional examples, and is intended to suppress the occurrence of cracks and chips in magnetic materials such as head chips, and to facilitate cleaning of the magnetic materials. The object of the present invention is to provide a method for cleaning magnetic materials that can be carried out satisfactorily.

[0005]

[Means for Solving the Problems] A method of cleaning a magnetic body according to the present invention is characterized in that the magnetic body is immersed in a cleaning liquid and the magnetic body is moved by changing the magnetic field to perform cleaning.

[0006]

[Function] According to the above-mentioned cleaning method, the magnetic bodies do not come into contact with each other due to the ultrasonic waves, and the cleaning liquid is agitated by the movement of the magnetic bodies, thereby improving the cleaning effect.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing the structure of a magnetic head chip cleaning apparatus according to this embodiment. In the cleaning device of this example,
A motor (8) is installed inside the main body case (7),
A plate-shaped rotating plate (10) is attached to the rotating shaft (9) of the motor (8).
) is attached. A permanent magnet (11) is attached to the upper surface of the rotating plate (10) at a distance D from the upper surface of the main body case (7). The motor (8
) is attached to the substrate (12), and the substrate (12
) are vertically movably attached to the columns (14) (14) by nuts (13) (13) (13) (13). A container (15) is arranged on the upper surface of the main body case (7). A cleaning liquid (16) such as acetone is contained in the container (15), and a head chip (17) made of a magnetic material such as ferrite is contained in the cleaning liquid (16).
are immersed in many. The cleaning liquid (1) in the container (15)
6) can be extracted from the drain pipe (19) by operating the valve (18). The magnet (11) is attached to a position offset from the center 0 of the rotating plate (10), as shown in FIG. Further, the center of the container (15) is located on the center 0 of the rotating plate (10). Incidentally, the rotational speed of the motor (8) can be adjusted by a speed controller, and the cleaning time can be set by a timer.

Next, the cleaning method of this embodiment using the above-mentioned cleaning device will be explained. First, the magnet (11) is rotated by the motor (8) while the cleaning liquid (16) and head chip (17) are contained in the container (15).
15) by changing the magnetic field within the head chip (
17) is rotated to wash the head chip (17) while stirring the washing liquid (16). Motor at this time (8)
The rotational speed of the head chips (17) is adjusted by the controller according to the number of head chips (17). Furthermore, when the rotation of the head chip (17) is weak, the magnetic field within the container (15) is strengthened by raising the rotating plate (10) and reducing the distance D. If the magnetic field in the container (15) is sufficient, the head chips (17) will be stacked radially as shown in FIG. For example, in order to clean the head chip (17) using a 3000~3600 glass magnet (11), the distance D is 1~3600 mm.
Approximately 5 mm is good. In addition, the cleaning time is the head chip (1
7) Set by a timer according to the amount and degree of dirt. In addition, the number of head chips (17) in one cleaning is 20.
Approximately 00 pieces is appropriate.

Next, after cleaning, pour the cleaning liquid (16) into the container (1
5) by operating the valve (18), place a dust-free paper (2) under the head chip (17) as shown in Figure 2.
0), and the head chip (17) is rotated and dried by the rotation of the motor (8) in the same way as in the above-mentioned cleaning method. Note that the conditions such as the rotation speed of the motor (8) and the distance D may be the same as those for the above-mentioned cleaning.

[0011] In the cleaning method of this embodiment as described above, unlike conventional ultrasonic cleaning, the head chips do not violently hit each other due to ultrasonic vibrations and cracks or chips occur in the head chips. Therefore, the decrease in yield can be suppressed. In addition, in this cleaning method, the head chip (17
) rotates in the same direction as the magnet (11), draws a circle, and is cleaned while stirring the cleaning liquid (16), so it can be cleaned more efficiently and in a shorter time than conventional ultrasonic cleaning.
In addition, in this cleaning method, since the head chip (17) is dried while rotating the head chip (17), the head chips (17) do not come into close contact with each other. The head chip (17) can be sufficiently dried and no stains will occur on the head chip (17).

[0012] In the above-mentioned embodiment, the cleaning method of the head chip was described, but the cleaning method of the present invention can also be applied to other magnetic materials other than the head chip.

[0013]

According to the present invention, it is possible to provide a method for cleaning a magnetic material, which can sufficiently clean the magnetic material without damaging the material.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the structure of a cleaning device.

FIG. 2 is a diagram showing the structure of a cleaning device.

FIG. 3 is a plan view showing the mounting position of the magnet.

FIG. 4 is a diagram showing a cleaning device.

[Explanation of symbols]

11 Permanent magnet 16 Cleaning liquid 17 Head chip (magnetic material)

Claims (1)

[Claims] 1. A method for cleaning a magnetic material, which comprises immersing the magnetic material in a cleaning liquid and cleaning the magnetic material by moving the magnetic material by changing a magnetic field.