JPS59171015A - Manufacture of erasing head - Google Patents

Abstract

PURPOSE:To decrease the number of manufacturing processing stages by placing and connecting a core to which a coil is wound, onto a frame consisting of a conductive and non-magnetic material, on which a gap part, an input terminal, an earth terminal, a fitting terminal, etc. are provided, and thereafter, sealing said frame with a resin. CONSTITUTION:A gap part 2 of an erasing head, an earth terminal 3, a fitting terminal 4 and an input terminal 5 are formed as one body with a frame 1 consisting of a conductive and non-magnetic material such as an aluminum plate or a copper plate, etc. A core 6 to which a coil 7 is wound in advance is placed at a necessary position of the frame 1, the gap part 2 is inserted between necessary cores, and the necessary parts are connected. The frame 1 formed in this way is contained in a cavity provided on a joined metallic die, and sealed with a resin. The outside of a body part 9 sealed with a resin is cut by leaving the terminals 3-5 by only a necessary length, and an erasing head is completed. In this way, the number of processing stages for the manufacture is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head, and more particularly to a method for manufacturing an erasing head that reduces the number of manufacturing steps.

Conventionally, the following manufacturing methods have been used to assemble magnetic heads.

(1) A gap portion is previously formed in the molding I, case, etc., a core is inserted across the portion that will become a cap, and the core and case are fixed with adhesive or the like.

(2) Interpose a spur 4 in the part that will become the key A and knob,
A gap is formed by bonding the cores with this spacer in between. Then, the core with the cap formed thereon is placed in a mold case or the like, and is cast and fixed.

Conventionally, as described above, the molding of the gap portion and the assembly of a portion of the body are performed in completely separate processes.

As a result, the number of work steps increases, resulting in extremely low efficiency. Furthermore, since the cap part is formed of a non-magnetic part using an adhesive or the like, there is a drawback that the dimensional accuracy is not good.

The present invention solves the above-mentioned conventional problems, and by simultaneously forming the gap and molding a part of the body, the number of steps in manufacturing is reduced, and reliability is improved by reducing the number of parts. The purpose of this paper is to provide a method for manufacturing an erasing head that has both improved performance and cost reduction.

Hereinafter, an embodiment of the method for manufacturing an erasing head according to the present invention will be described with reference to the drawings.

First, the gap portion of the erasing head in the present invention is the first
As shown in the figure, it is formed integrally with a frame 1 made of a conductive, non-magnetic material such as an aluminum plate or a copper plate by pre-squeezing or squeezing. In the example, 2 in the figure is a gap portion.

3 is a ground terminal, and 5 is an input terminal, each of which is formed integrally with the frame 1. Then the second
A core 6 as shown in the figure is placed at a required position on the frame 1 shown in FIG. 1, and the core 6 is connected to each terminal provided on the frame 1 described above. A coil 7 is wound around the core 6 in advance, and when arranging the core 6, the gap 2 formed between the frame I and the body is first inserted into the required core. . In addition, input terminal 5'' carp and elbow winding terminal 8 are connected.
Furthermore, apply Tighte between the ground terminal 3 and the core 6. As mentioned above, if the core 6 is arranged in the 1 node 1, the connection to each terminal is bonded. , the above-mentioned knob itself is placed in a cavity provided in a mold, and the body portion is molded □. When molding the body part, use a transfer molding machine and a multi-cavity metal molding machine using the transfer molding method.
is used. In this method, the molding material of 9 sizes or granules is preformed into a tablet shape, and the object (
In the case of the embodiment, the frame 1) on which the core 6 is disposed is placed in a fixed mating mold, but at this time, if necessary, it may be preheated by a high-frequency heating device. this[·
The transfer molding method is a method in which fluidized resin is injected under pressure into the cavity of the mold using a plunger at the same time as tablets are introduced, and it is possible to mold a large number of tablets at once, and can be molded at relatively low pressure. It is characterized by what is possible.

After undergoing the transfer molding process described in ``1'', when the frame 1 described in ``1'' is taken out from the cavity of the mating mold, part 9 of the body is sealed with resin, as shown in Fig. 3. What was stopped is obtained. After that, ground terminal 3. Installation () Cut terminals 4 and input terminals 5 to the required length, and cut other unnecessary terminals on the body surface and separate them from frame 1.
A completed erase head as shown in FIG. 4 is obtained.

Although the explanation above takes the case of a single type erasing head as an example, it can also be applied to a semi-dub pal type erasing head, and it can be implemented by modifying the seed bar as long as the purpose is not changed. It goes without saying that it can be done.

As described above, the present invention includes the gear Eve part 2 and the body part 9.
In the manufacturing method of the erase head, an input terminal 5. is formed on the cap part 2 at the same time. Earth terminal 3. Using a frame 1 made of a conductive/non-magnetic material and provided with IJ terminals 4, etc., (a) a core around which a coil 7 is wound, 6 are arranged at required positions on the frame 1. (+)) Once the core 6 is arranged, the frame 1 to which the necessary parts are connected is sealed with resin to form a body part 9. and (C) leaving the terminals on the outside of the body part 9 to obtain the erasing head.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a frame used in an embodiment of the present invention.
Figure 2 is a diagram showing a core with coils wound and mounted;
The figure does not show a part of the molded body, and FIG. 4 is a diagram showing a completed product of the erasing head according to the present invention. 1: Frame, 2: Gear part 3: Earth terminal, 4 = Mounting terminal 5: Input terminal, 6: Core 7: Coil, 8: Winding terminal 9: Part of the body.

Claims (1)

[Claims] In a method of manufacturing an erasing head in which a gap portion and a part of the body are formed simultaneously, an Using a frame made of a magnetic, non-magnetic material,
1. By placing it in the required position of 2. a step of connecting with an input terminal; (b) a step of applying resin sealing to the frame on which the core is arranged and the necessary parts are connected to form a part of the body; and (c) a step of forming a part of the body. 1: A method for manufacturing an erasing head, comprising the steps of: leaving a terminal marked ``1'' on the outside of a part of the body;