JPS593835B2 - Connector manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a new and improved compact connector used for connecting a liquid crystal display device and its driving circuit.

Conventionally, a connector is known in which a plurality of metal thin film rings are separately provided on the circumferential surface of a rod made of an insulating rubber-like elastic body, and are used by elastically interposing them between desired electrodes.

These types of connectors are usually made by pouring silicone rubber into a thin-walled copper pipe and using an etching method to leave multiple copper rings around the silicone rubber rod after curing, or by using an insulating rubber-like elastic material. It was manufactured by forming a metal vapor deposition film on the circumferential surface of the rod, which was made up of the body, and then using the same etching method to leave a plurality of metal rings. However, all of the above-mentioned conventionally known methods involve complicated operations and time-consuming etching steps, and therefore have the disadvantages of low productivity and high costs. In order to solve the disadvantages and shortcomings of the above-mentioned conventional methods, the present inventors first fabricated a layer of striped conductive material 10, which was previously formed on the surface of a flexible film, by using an elastic or flexible material. We have proposed a method (Japanese Patent Application No. 53-11006) in which the material is transferred and integrated onto the outer circumferential surface of a core material consisting of a body.

Although this method can eliminate the above-mentioned disadvantages of IIL, it does not require bonding the surface of the film with the conductive material layer and the core material through a type of adhesive that hardens or hardens at room temperature or under heat. Since these are glued together in a hollow tube and then taken out from the tube, excess adhesive often protrudes from the seams of the film and hardens or hardens, causing the core material to deteriorate. This has the disadvantage that it becomes difficult to take out the material from the hollow tube, resulting in a decrease in working efficiency. The present invention provides an improved method for manufacturing a connector that solves these disadvantages. A flexible film is wrapped around a core material made of an elastomer via an adhesive, passed through a heating bath to bond and integrate the conductive material layer with the core material, and then the film is separated from the core material by 30 minutes. It is characterized by being peeled off.

Hereinafter, the method of the present invention will be explained in detail according to its manufacturing process based on the accompanying drawings. First, in carrying out the method of the present invention, as shown in FIG. A flexible film 2 having layers 1... is prepared.

The flexible film 2 has a conductive material layer 1 on the surface of which is well adhered, and after transferring the conductive material layer to the surface of the core material made of an insulating elastomer. The film is made of a material that has good peelability from the conductive material layer 1, and examples of this film include polypropylene, polyvinyl chloride, polyethylene, ethyl cellulose, cellulose diacetate, cellulose triacetate, Suitable materials include polyimide, polyamide, polyimide amide, and the like.

Further, regarding the thickness of the film, since this film will be bent with a considerably small radius of curvature in the next step, a thickness of about 5 to 200 μm is appropriate in consideration of its rigidity and flexibility. On the other hand, the layer 1 of the conductive material includes conductivity-imparting agents such as powder and granules of carbon black, carbon fiber, graphite, aluminum, nickel, tungsten carbide, copper, silver, and gold, and other necessary additives. For example, it is composed of a conductive paint made by uniformly dispersing antioxidants, lubricants, etc., and a layer of this conductive material is applied onto the film using various conventionally known painting and printing methods. It is formed.

The flexible film 2 having the striped conductive material layer 1 on its surface obtained as described above preferably has a constant width w in the direction perpendicular to the orientation direction of the striped conductive material layer 1. In the method of the present invention, this tape-shaped flexible film 3 is first wound onto a rod-shaped or tube-shaped core material 6 made of an insulating elastomer using a suitable adhesive. For example, as shown in FIG. 2, a ring-shaped body 4 having an inner diameter approximately equal to the outer diameter of the core material 6, or a short tubular body 8 as shown in FIG. Temporary bonding is performed by passing the material through a jig wound into a coil.

In this case, it is desirable that the tape-like film 3 is wound so that its length direction coincides with the length direction of the core material 6, so that the conductive material layer 1 forms a ring. The width w of the film 3 is approximately equal to the outer peripheral surface of the core material 6. As the material of the core material 6 used in the present invention, any flexible material can be used, such as soft vinyl chloride, soft olefin resin, ethylene vinyl acetate copolymer resin, silicone rubber, and other synthetic rubbers. However, for this purpose, a rubber-like elastic material with low compression set, such as silicone rubber, is preferable.

Further, the adhesive used in the present invention may be any type of adhesive that cures or solidifies at room temperature or under heat, such as urethane-based, epoxy-based, unsaturated polyester-based, vinyl chloride monoacetic acid, etc. Any vinyl copolymer-based, silicone-based, or other synthetic rubber-based material that exhibits flexibility after curing or solidification can be used.

To apply the adhesive to the surface of the core material, for example, as shown in FIGS. 2 and 3, the core material 6 is attached to the ring 4 or the short tube 8
When inserting and winding the film 3, adhesive is supplied to the surface of the core material through the nozzle 5, or before winding the film 3 around the core material 6, the core material 6 is introduced into a tank filled with adhesive and the core material is This is done by applying adhesive to the surface of the material. At this time, if the same type of adhesive is applied in advance to the surface of the conductive material layer attached to the film 3, this will serve as a protective layer for the conductive material layer and will be easy to wrap around the film 3. The associated conductive material layer sag, cut,
It is possible to prevent the occurrence of leaks, etc.

Further, the ring-shaped body 4 or the short tube 8 used in the present invention is a jig for joining the tape-shaped film 3 to the outer peripheral surface of the core material 6, and its inner diameter is The outer diameter is approximately equal to or slightly smaller than the outer diameter of the film 3 wrapped around the adhesive layer, and the inner peripheral surface is made as smooth and uniform as possible. Next, in the manufacturing method of the present invention, the tape-shaped film 3 is attached to the surface of the core material 6 with an adhesive as described above.
After the film 3 is temporarily bonded by passing through the ring-shaped body 4 or the short tubular body 8, the adhesive is cured or solidified to integrate the film 3 with the core material 6. This is carried out by passing the material continuously through a heating bath 7 as shown in FIGS. 2 and 3.

In the present invention, the components of the heating bath are not particularly limited, and include, for example, water, silicone oil, high boiling point solvents such as polyethylene glycol, diacetone alcohol, butyl alcohol, and wax, as well as glass, Any of powdered inorganic substances such as mica, powdered glass beads of organic substances such as Teflon, granular substances such as calcium carbonate and silica gel, etc., can be used, but the film 3 temporarily attached to the surface of the core material 6 is completely bonded and integrated. In order to prevent the heating bath from being peeled off during this period, it is desirable that the heating bath be a relatively high viscosity liquid or granular material. In addition, the temperature of this heating bath is generally 70~
A range of 250°C is considered appropriate. After the curing or solidifying process of the adhesive is completed in this way, the heating bath 7
By removing the film 3 from the surface of the core material 6, it is possible to obtain a connector in which conductive material layers are transferred and integrated onto the surface of the core material at regular intervals.

In addition, in FIGS. 2 and 3, the ring-shaped body 4 and the short tubular body 8 used for temporarily adhering the film 3 to the surface of the core material 6, and the ring-shaped body 4 provided opposite these are shown. (The short tubular bodies 8' each effectively prevent the heating bath from leaking out from the tank 7.

Examples of the present invention will be described below.

Example 1 As shown in Fig. 1, a striped pattern 1 was applied on the surface of the conductive paint made by blending carbon black powder with a width of 0.75u and a pitch of 1.5u. Sa25
As shown in FIG. 2, a polyester film 3 with a width of about 6.3 μm and a length of silicone rubber tube 6 with an outer diameter of 1.5711 J1 and an inner diameter of 0.8 While wrapping the hardening agent Cat
Two-component silicone rubber compound KElO6L containing 10% by weight of RG [trade name of Shin-Etsu Chemical Co., Ltd.]
T [trade name of Shin-Etsu Chemical Co., Ltd.] as an adhesive is supplied to the circumferential surface of the tube 6 through the nozzle 5, and the tube is filled with glycerin to a length of 200 μ and heated to 150° C. to create a heating bath. The ring-shaped body 4 made of silicone rubber with an inner diameter of 2U1 and a cross-sectional diameter of 1U attached to the end wall of the tank 7 is passed through the heating bath at a speed of 0.2 m/min while being temporarily bonded. After taking it out from the ring-shaped body 1 provided on the wall, when the film 3 is peeled off from the tube 6, a long connector in which the printed pattern 1 made of conductive paint is transferred and integrated in a ring shape is continuously obtained. I was able to do that.

Example 2 As shown in Figure 3, the length is 200WJ! A glass tube 8 with a length of 20 U and an inner diameter of 2 U was attached to the end wall of the tank 7 of t, and filled with tetrafluoroethylene powder and kept at 150° C., with the same pattern as the tape-shaped film used in Example 1. 1 is wrapped around a long silicone rubber tube 6 with the pattern 1 on the inside, and the same adhesive used in Example 1 is applied to the circumferential surface of the tube 6 through the nozzle 5. These were then inserted into the glass tube 8 and passed continuously through the heating bath 7 at a speed of 0.2 m/min.
When the film 3 was removed from the tube 6, a long connector with the printed pattern 1 transferred and integrated in a ring shape was continuously obtained.

[Brief explanation of drawings]

FIG. 1 is a plan view of a striped film made of conductive material used in the method of the present invention, and FIGS. 2 and 3 respectively show different embodiments of the apparatus for carrying out the method of the present invention. It is a schematic block diagram. DESCRIPTION OF SYMBOLS 1... Conductive material layer, 2... Flexible film, 3...
...Tabular film, 4...Ring-shaped body, 5...
Adhesive supply nozzle, 6... core material, 7... heating bath,
8...Short tubular body.

Claims (1)

[Claims] 1. A tape-like flexible film having a conductive material layer coated in stripes on the inner surface is wrapped around a core material made of an elastomer via an adhesive, and passed through a heating bath to form the conductive material layer. A method for manufacturing a connector, which comprises bonding and integrating a material layer with a core material, and then peeling off the film from the core material.