JP2520035B2 - Method for manufacturing multi-layer electric contact forming material having non-bonded portion - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a multilayer electric contact-forming material having a non-adhesive portion.

(Prior art and its problems) As a manufacturing material of an electrical contactor, the present applicant has previously provided a metal layer (1) for imparting conductivity and a metal layer (2) for imparting springiness as shown in FIG. A plastic layer (3), for example, a multi-layer electric contact forming material has been proposed, which is laminated by interposing a sheet-like adhesive material, and then pressure-heated to bond and laminate (Japanese Patent Laid-Open No. 61-61).
See 19080).

In this forming material, the materials used for the conductivity imparting metal layer (1) and the springiness imparting metal layer (2) can be independently selected. Moreover, the metal (1) for imparting conductivity is cut as shown by the dotted line in FIG. 1 and pressed so as to have the contact protrusions (1a), or a plurality of contact parts (4) are left by etching technique. And then press to have the contact protrusions (1a), so that the single-pole electric contact shown in FIG. 2 (a) or the multi-pole electric contact shown in FIG. 2 (b) (c). Can be manufactured. Therefore, there is an advantage that it is possible to easily manufacture an excellent electric contact having both required conductivity and splashing property which cannot be obtained by the conventional one.

By the way, in this electric contact forming material, when the contact protrusion (1a) is formed by pressing, the conductivity imparting metal layer (1) and the plastic layer (3) adhered to the springiness imparting metal layer (2) are It often affects the spring force of the springiness imparting metal layer (2), and the degree thereof also changes depending on the spring force of the springiness imparting metal layer (2).

Therefore, in order to solve this, for example, FIG.
As shown in (b), (c) and (d), the non-adhesive portion (5) is provided on the portion of the contact protrusion (1a) and further on the portion including the contact protrusion (1a) by the following means, and the spring is formed. Elimination of power effects is being done. For example, as shown in FIG. 4, a sheet-like adhesive material to be the insulating plastic layer (3) is attached on the metal layer (1) for imparting conductivity so as to leave the non-adhesive portion (5), and then the elasticity is imparted. A method of forming the metal layers (2) by superimposing them, or as shown in FIG. 5 (a), an adhesive tape (6) is attached to a portion where the non-adhesive part (5) of the conductivity imparting metal layer (1) is installed. After applying, a liquid adhesive (7) which becomes the insulating plastic layer (3) is applied as shown in FIG. 5 (b). After that, the adhesive tape (6) is peeled off, and the springiness imparting metal layer (2) is superposed and adhered.

However, since the sheet-like adhesive used in the method shown in FIG. 4 is thin and soft, it takes considerable skill to attach it so that the width of the non-adhesive portion (5) does not change over the entire length and is left accurately. Requires.

For this reason, the non-adhesive portion (5) is caused to have a non-uniform width, and the spring force between the electric contacts manufactured as shown in FIGS. 1 and 2 is likely to vary. Further, as described above with reference to FIG. 5, the adhesive tape (6) is attached to the non-adhesive part (5).
Even with the method of sticking the tape, it is difficult to stick the tape accurately, and moreover, it is necessary to remove the tape after applying the adhesive.

(Object of the Invention) The present invention provides a method for easily and accurately forming a non-bonded portion, and makes it possible to easily manufacture an electric contactor having required conductivity and spring pressure without variation in contact spring pressure. It is a thing.

(Means and Actions of the Present Invention for Solving Problems) The features of the present invention are as follows. That is, an adhesive having a property of exhibiting adhesiveness is used only in a heated portion, such as a thermoplastic or thermosetting adhesive, and this is used as an insulating plastic layer to provide a metal for imparting conductivity. It is provided on the entire surface between the layer and the springiness imparting metal.
Then, a missing portion (8a) having a dimension corresponding to the non-adhesive portion that requires this laminated body, for example, the above-mentioned FIGS.
In the case of making a contactor having a non-adhesive portion (5) of FIG. 6, in the case of making a contactor having a ridge shape as shown in FIG. 6 (a) and having a non-adhesive portion (5) of FIG. 3 (c). In the case of making a contactor having a two-step ridge shape as shown in FIG. 6 (b) and further having a non-adhesive part (5) as shown in FIG. 3 (d), compared with FIG. 6 (a). As shown in FIG. 7, the bonding tool (8) provided with a notch (8a) having a wide width is heated while applying pressure to bond the non-bonded portion.

In this way, the position of the forming material can be fixed at a fixed position by a method such as fitting into the mold, and the bonding tool can be lowered from the fixed position to easily press and heat the forming material. Therefore, if the dimension and shape of the missing portion (8a) of the bonding tool (8) are accurately made, the non-bonding portion (5) can be easily and accurately formed at a predetermined position. Therefore, it is possible to extremely reduce the possibility that the contact spring pressure varies when the multi-pole contact is made, as well as when the single-pole contact is made by cutting the forming material.

(Example) FIG. 8 is an example of a manufacturing process when a sheet adhesive is used as the insulating plastic layer (3), and FIG. 9 is a manufacturing process when an adhesive is applied as the insulating plastic layer (3). It is a process example drawing, and in all cases, the non-contact part (5) is a case of a full width as shown in FIG. 6 (a). 8th
In the figure, as shown in (a) and (b), a sheet-like adhesive material (3) having a release paper (3a) to be an insulating plastic layer is overlaid on one surface of the conductivity-imparting metal layer (1) and pressed. While adhering on the entire surface. Next, the release paper (3a) is peeled off as shown in FIG. (C), and then the spring property imparting metal layer (2) is superposed on it as shown in (d) and (e). After that, as shown in Fig. 7, the non-adhesive part (5) is formed on top of this.
A bonding tool (8) having a missing portion (8a) corresponding to the above is placed and heated while being pressurized to form a forming material having a non-bonding portion. In FIG. 8, as the conductivity-imparting metal layer, it is also possible to use a laminated material in which an electrically insulating plastic such as polyimide or polyester is laminated on a metal such as copper.

Further, in FIG. 9, as shown in FIG. 9A, a liquid adhesive (7) which becomes an insulating plastic layer (3) is applied on the conductivity imparting metal layer (1). A spring property imparting metal layer (2) is superposed on this as shown in FIG. According to the procedure of FIG. 7, a shape corresponding to the non-adhesive part is put on an adhesive tool having a missing part (8a), which is heated under pressure,
It is designed to make a forming material with the required non-adhesive part.In this case, the adhesive softened by heating is pressed,
If there is a risk that the adhesive will squeeze out to the non-bonded portion, the dimensions of the missing portion (8a) of the bonding tool (8) may be determined in advance in advance.

Note that, in the above, the case has been described in which one or a plurality of non-bonded portions are formed over the entire width of the forming material. However, as shown in FIGS. 10 (a), (b), and (c), for example, a rectangular or round non-bonded portion (5) having a width or diameter wider than that of the contactor.
After being formed at intervals by the bonding tool (8) having the notch (8a) corresponding thereto, the unipolar electric contactor can be formed by cutting at the position of the dotted line in the figure and pressing. Further, as shown in FIGS. 10 (d) and (e), non-bonded portions (5) having wavy portions at the top and bottom in the longitudinal direction of the contact are made in the same manner, and cut at the dotted line position in the figure, It is also possible to increase the adhesive strength by increasing the adhesive area at the left and right ends of the contact.

Further, the example in which the stamp type bonding tool is used for manufacturing has been described above, but the following is preferable for continuous manufacturing. For example, as an adhesive tool, for example, the 11th
As shown in FIG. 11 (a), a circular roller surface (8b) is provided with a cutout portion (8a) corresponding to the width of the non-bonded portion in the circumferential direction over the entire circumference, or FIG. 11 (b). As shown in Fig. 10, the circular roller surface (8b) is provided with a notch portion (8a) having a dimension and shape corresponding to the non-bonded portion (5) of Figs. 10 (a), (b) and (c) at a required interval in the circumferential direction. While using a rotary type adhesive tool (8) provided over the entire circumference and sandwiching a layered sheet of an electroconductive metal layer plate, a sheet-shaped adhesive material and a spring type metal plate with this and a base roller. You can send it continuously. In this case, the rotating shaft (8c) is supported by a bearing (not shown), and heating is inserted and fixed so that there is a small gap in the through hole (8d) of the rotating shaft (8c). It is performed by the body, and may be performed by using a heating wire as the heating body through the above, or by circulating a heating medium such as heating steam or heating oil in the mold, applying the principle of ultrasonic welding. You may go.

(Effects of the Invention) As is apparent from the above, according to the present invention, the heat-bonding type adhesive material is sandwiched between the conductivity imparting metal layer and the springiness imparting metal layer, and the missing portion corresponding to the non-adhesive portion is formed. Since the non-adhesive portion of the electric contactor is formed by adhering the parts other than the non-adhesive portion by heating under pressure with the adhering tool having the It was possible to easily obtain a width that was the same as the width of the cutout portion and was even. As a result, it has become possible to easily manufacture a multilayer electric contact forming material having a required contact spring pressure and a non-contact portion where the contact spring pressure hardly varies.

In the electric contact forming material produced according to the present invention, the adhesive layer is interposed in the non-adhesive portion, and the conductivity imparting metal (1) and the springiness imparting metal (2) are also present in the non-adhesive portion. Since there is no direct contact, both metal layers (1)
There is also an advantage that it is possible to obtain an electric contactor in which there is no concern about electric insulation in (2).

[Brief description of drawings]

FIGS. 1 and 2 are structural examples of a multilayer electric contact forming material and an electric contact made by the same, and FIG. 3 is an explanatory view of a conventional multilayer electric contact having a non-adhesive portion, FIG. FIG. 5 is an explanatory view of a conventional method for producing a multilayer electric contact forming material having a non-adhesive portion, and FIGS. 6 and 7 are explanatory views of the principle of the production method of the present invention, FIGS. 8 and 9. , FIG. 10 and FIG. 11 are diagrams of embodiments of the present invention. (1) ... Conductivity-imparting metal layer, (1a) ... Contact protrusion,
(2) ... Spring-forming metal layer, (3) ... Insulating plastic layer, (4) ... Contact part, (5) ... Non-adhesive part, (6) ... Adhesive tape, (7) ……adhesive,
(8) …… Adhesive tool, (8a) …… Missing part, (8b) …… Roller surface, (8c) …… Rotary axis.

Claims (1)

(57) [Claims] 1. An adhesive material which serves as an insulating plastic layer is sandwiched between a metal plate for imparting conductivity and a metal plate for imparting spring property, and this is applied by an adhesive tool provided with a notch corresponding to the shape of the non-adhesive part. A method for producing a multilayer electric contact forming material having a non-adhesive portion, which is characterized in that it is produced by heating under pressure.