JP5399138B2 - Coaxial cable manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a coaxial cable, and more particularly to a method for manufacturing a coaxial cable that prevents flux, tin balls, and solder balls from entering the hollow portion of a hollow core body.

  Conventionally, a central conductor, an inner annular portion that covers the outer periphery of the central conductor, three or more rib portions that extend radially outward from the outer periphery of the inner annular portion, and an outer annular portion that connects the outer ends of the rib portions. A coaxial cable including a hollow core body having an outer conductor layer, an outer conductor layer provided outside the hollow core body, and a jacket layer provided outside the outer conductor layer is known (see, for example, Patent Document 1).

JP 2003-249129 A

In the above prior art, since the hollow core body is a dielectric, a coaxial cable having excellent high frequency characteristics can be obtained.
However, there has been a problem that the flux, tin ball, or solder ball may enter the hollow portion of the hollow core body and deteriorate the characteristics.
Accordingly, an object of the present invention is to provide a method of manufacturing a coaxial cable that prevents flux, tin balls, and solder balls from entering the hollow portion of the hollow core body.

In a first aspect, the present invention provides a central conductor, an inner annular portion that covers the outer periphery of the central conductor, three or more rib portions that extend radially outward from the outer periphery of the inner annular portion, and the rib portion. The coaxial cable comprising: a hollow core body having an outer annular portion connecting the outer ends of the outer core body; an outer conductor layer provided outside the hollow core body; and a jacket layer provided outside the outer conductor layer. Strip the jacket layer for a predetermined length, then seal the tip of the exposed outer conductor layer by thermocompression bonding, then apply the flux to the exposed outer conductor layer, then coat the outer conductor layer with tin or solder, Next, a coaxial cable manufacturing method is provided in which the central conductor, the hollow core body, and the outer conductor layer are exposed by step processing.
In the manufacturing method of the coaxial cable according to the first aspect, the front end portion of the outer conductor layer is sealed by thermocompression bonding, and then the flux is applied to the outer conductor layer and tin coating or solder coating is performed. It is possible to prevent flux, tin balls, and solder balls from entering the portion.

  According to the method for manufacturing a coaxial cable of the present invention, it is possible to prevent intrusion of flux, tin balls, solder balls, and the like into the hollow portion of the hollow core body. It is possible to prevent deterioration of characteristics.

It is a cross-sectional view of a coaxial cable. It is A-A 'sectional drawing of FIG. It is a longitudinal cross-sectional view which shows a jacket peeling process. 3 is a longitudinal sectional view showing a tip thermocompression bonding step according to Example 1. FIG. It is a longitudinal cross-sectional view which shows a flux application | coating process. It is a longitudinal cross-sectional view which shows a solder plating process. It is a longitudinal cross-sectional view which shows the 1st step of a level | step difference manufacturing process. It is a longitudinal cross-sectional view which shows the 2nd step of a level | step difference manufacturing process. It is a longitudinal cross-sectional view which shows the front-end | tip part level difference processed coaxial cable.

  Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings. Note that the present invention is not limited thereby.

Example 1
FIG. 1 is a cross-sectional view of the coaxial cable 5. FIG. 2 is a longitudinal sectional view of the same.
The coaxial cable 5 connects the center conductor 1, the inner ring portion 2a covering the outer periphery of the center conductor 1, the rib portion 2b extending radially outward from the outer periphery of the inner ring portion 2a, and the outer end of the rib portion 2b. A hollow core body 2 having an outer annular portion 2c, an outer conductor layer 3 provided outside the hollow core body 2, and a jacket layer 4 provided outside the outer conductor layer 3.

  The outer conductor layer 3 is formed by winding or longitudinally attaching a metal laminate tape, a metal vapor-deposited tape or a metal tape, braiding by a metal element wire, horizontal winding or a combination thereof.

As shown in FIG. 3, first, the jacket layer 4 of the coaxial cable 5 is peeled by a length L.
As shown in FIG. 4, next, the tip 5a of the outer conductor layer 3 exposed by peeling the jacket layer 4 is sealed by thermocompression bonding.
Next, as shown in FIG. 5, a flux f is applied to the exposed outer conductor layer 3.
Next, as shown in FIG. 6, a tin coat or a solder coat S is applied to the outer conductor layer 3 to which the flux f is applied.
Next, as shown in FIG. 7, the thermocompression-bonded tip is excised.
As shown in FIG. 8, the outer conductor layer 3 is then cut by an appropriate length to expose the hollow core body 2.
Next, as shown in FIG. 9, the hollow core body 2 is cut by an appropriate length to expose the central conductor 1.
As described above, the coaxial cable 10 having the processed tip end step, in which the central conductor 1, the hollow core body 2, and the outer conductor layer 3 are exposed, can be manufactured.

  In the coaxial cable 10 with the processed tip portion processed according to the first embodiment, the tip portion 5a of the outer conductor layer 3 is sealed by thermocompression bonding, and then the flux f is applied to the outer conductor layer 3, and the tin coat or solder coat S is applied. Therefore, flux, tin balls, and solder balls can be prevented from entering the hollow portion of the hollow core body 2.

  The method for manufacturing a coaxial cable of the present invention is useful for manufacturing a high-performance coaxial cable in which the dielectric layer is a hollow core body.

DESCRIPTION OF SYMBOLS 1 Center conductor 2 Hollow core body 2a Inner ring part 2b Rib part 2c Outer ring part 3 Outer conductor layer 4 Jacket layer 5 Coaxial cable 5a End of outer conductor layer 10 End-of-step processed coaxial cable f Flux S Tin coat or solder coat

Claims (1)

A central conductor, an inner annular portion covering the outer periphery of the central conductor, three or more rib portions extending radially outward from the outer periphery of the inner annular portion, and an outer annular portion connecting the outer ends of the rib portions; A predetermined length of the jacket layer of the coaxial cable comprising a hollow core body having an outer conductor layer, an outer conductor layer provided outside the hollow core body, and a jacket layer provided outside the outer conductor layer; the tip of the exposed outer conductor layer sealing the hollow portion of the core body by thermocompression bonding, the flux is applied to the exposed outer conductor layer then, then tin-coated or solder coating to the outer conductor layer, the following A method for manufacturing a coaxial cable , comprising: cutting off the thermocompression-bonded tip and then exposing a central conductor, a hollow core body, and an outer conductor layer by step processing.

Images