JPS601451Y2 - Flat cable manufacturing equipment with jacket - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a manufacturing device for a jacketed flat cable.

Flat cables, in which multiple conductors are arranged in parallel and insulated, are often used for wiring inside equipment.

This flat cable has the advantage that it can be electrically connected to a standardized terminal board at once if the distance between adjacent wires is accurate, but the plastic material that fills the wires generally suffers from processing distortion during extrusion molding over time. Because it has the property of relaxing and gradually deforming over time, it has the disadvantage that the distance between the wires changes if the time from the cable production to the cable connection processing is long.

The present invention relates to a jacketed cable manufacturing apparatus for manufacturing a cable that eliminates the above-mentioned drawbacks.

That is, the present invention, as shown in the embodiment of FIG. 1 and the cross-sectional view of the product in FIG. A first extruder 4 for extrusion coating, and a second extruder 6 for extrusion coating a second jacket 5 on the outer periphery of this first jacket. A heat treatment device 7 that reheats the first jacket 3 to near its softening temperature before extrusion coating the second jacket 5; and a heat insulating device 7 that inserts a heat insulating material 12 between the first jacket 3 and the second jacket 5. This invention relates to a jacketed flat cable manufacturing apparatus characterized by comprising a material supply device 8 and a cooling device 9 for rapidly cooling the second jacket 5 immediately after extrusion coating.

Here, the first extruder is of a type in which, for example, the tape-shaped plastic extruded from two extrusion heads is crimped with a calender roll 10 below it, and the fiber interval is set to a predetermined value by a fiber guide 11. be done.

Next, in the heat treatment device 7, the calender roll 10
In order to relieve the internal stress of the first jacket forcibly formed, the first jacket is reheated to near its softening temperature using an electric heater or the like.

Here, the distance between the fibers after the distortion has been alleviated may be set as the determined value, and a correction corresponding to this value may be applied to the fiber guide.

This process can minimize changes in core spacing over time.

Next, a heat insulating tape such as a foamed plastic tape is supplied from a heat insulating material supply device 8, its outer periphery is covered with a second jacket, and a cooling device 9 consists of a nozzle, etc. that sends cold air.
quench by.

In this way, by using the heat insulating material 12 to prevent the heat during the extrusion coating of the second jacket 5 from being transmitted to the first jacket 3 as much as possible, it is possible to prevent the first jacket from being reheated and strain caused by external stress. It is possible to manufacture a jacketed flat cable with extremely high precision line spacing and little change over time.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an embodiment of the device of the present invention, and Fig. 2 is a cross-sectional view of a jacketed flat cable manufactured by this device, where 1 is a core wire, 2 is a core wire supply, and 3 is a first jacket. , 4 is the first extruder, 6 is the second extruder, 5
7 is a second jacket, 7 is a heat treatment device, 8 is a heat insulating material supply device, 9 is a cooling device, and 12 is a heat insulating material.

Claims (1)

[Scope of utility model registration request] a core wire supply device for supplying a plurality of core wires; a first extruder for extrusion coating a first jacket surrounding the core wire; and a first extruder for extrusion coating a second jacket around the outer periphery of the first jacket. a heat treatment device for reheating the first jacket extrusion-coated by the first extruder to a temperature close to the softening temperature before coating the second jacket; A jacketed flat cable manufacturing apparatus comprising: a heat insulating material supply device that inserts a heat insulating material between a jacket and a second jacket; and a cooling device that rapidly cools the second jacket immediately after extrusion coating. .