JPS63313422A - Manufacture of flat cable - Google Patents

Abstract

PURPOSE:To make such a slit flat cable that is good in characteristic manufacturable by bonding an aligned insulating core group uniformly over the cross direction as a whole at the bonded part intermittently installed in the longitudinal direction. CONSTITUTION:After fused thermoplastic resin 3 is intermittently extruded onto each surface of plural pieces of insulating cores 1, traveling continuously and being adjacently arranged in parallel with one another so as to traverse the cross direction by an extruder 2, this core group is passed through a receiving pressure press 4, and simultaneously with this receiving, the thermoplastic resin 3 is extended longer. Thus, the core group is passed through the receiving pressure press 4 whereby the thermoplastic resin covered part 5 extruded onto each surface of the insulating core group 1 is extensively extended in both longitudinal and cross directions of the core and comes to uniformly cover the full width of the core group 1 in consequence. With this constitution, adhesive strength between cores is large enough, thus such a slit flat cable that is good in characteristics is produced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a method of manufacturing a flat cable having a slit portion.

(Technical background of the invention and its problems) A slit flat cable is a flat cable in which portions where the cores are bonded and portions where the cores are not bonded (slit portions) are alternately provided in the longitudinal direction. is provided to give flexibility to the cable and to facilitate the formation of sunburn.

Conventionally, in order to manufacture such a slit flat table, adhesive made of thermoplastic resin is intermittently extruded at regular intervals between several insulating cores running in parallel. After that, the adhesive is spread between a pair of rolls arranged vertically to face each other, and the cores are bonded through this.

However, this method has the problem that the adhesive tends to stick to the roll surface and it is difficult for the adhesive to spread uniformly over the entire width direction of the surface of the insulating core group. (Objective of the Invention) The present invention solves these problems. This was developed to create a slit flat cable with good properties by uniformly bonding aligned insulating core groups across the entire width using bonding sections provided intermittently in the length direction. The purpose is to provide a method for

(Summary of the Invention) The method for manufacturing a flood cable of the present invention is to apply an extruder to the surface of several insulating cores arranged parallel to each other and running continuously, so as to cross the width direction of the insulating cores. ,
After extruding the molten thermoplastic resin intermittently, the core group is passed through a take-off press, and the thermoplastic resin is spread at the same time as the core group is taken off.

(Example of the invention) Embodiments of the present invention will be described below based on the drawings.

In the embodiment, first, as shown in the drawings, a plurality of insulating cores 1 are drawn out from a supply bobbin (not shown) and run continuously in parallel with each other so as to traverse the entire width direction. A melted and softened thermoplastic resin 3 for bonding is extruded and coated intermittently in the length direction by an extruder 2.

Next, this group of insulating cores intermittently coated with the thermoplastic resin 3 is taken off through a taking-off press 4 that repeats the following operation.

In other words, this presser press 4 has two parts arranged vertically opposite each other.
Consisting of a pair of press plates 4a and 4b, these press plates 4
a and 4b are closed only when the thermoplastic resin coating ms passes through, and are moved an appropriate distance in the running direction of the insulating core 1 while pressing this coating part 5, and then separated vertically to form a group of insulating cores. Release and repeat the action of returning to the original position.

By passing through such a take-up press 4, the thermoplastic resin wave PIt portion 5 extruded onto the surface of the first group of insulating cores
is widely spread in the length and width directions of the core, and the core 1
This will evenly cover the entire width of the group.

(Effects of the Invention) As is clear from the above description, in the manufacturing method of the present invention, the thermoplastic adhesive resin extruded onto the surface of the insulating core group is held in a presser press for take-up and pushed out. Therefore, this resin is sufficiently spread over the entire width of the core group, and a slit flat knurple with high adhesive strength between cores and good properties can be obtained.

[Brief explanation of drawings]

The drawing is a perspective explanatory view showing one embodiment of the present invention. 1----------Insulated core 2--------1 Extruder 3・---111 Thermoplastic resin ４　－－－－－“Press press for take-up゛Mount II-

Claims (1)

[Claims] 1. After intermittently extruding a molten thermoplastic resin across the width direction onto the surface of several insulating cores arranged parallel to each other and running continuously, 1. A method for manufacturing a flat cable, comprising passing the core group through a take-off press and spreading the thermoplastic resin at the same time as the take-off.