JPH0523351U - Foam wire manufacturing equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an apparatus for manufacturing a foamed electric wire, which can prevent the foamed electric wire from floating above the water surface due to its buoyancy in a water tank. [Structure] The foamed electric wire 9 is hung over a tension sheave 15 between a water tank 10 and a take-up machine 14. The tension sheave 15 is connected to a tension applying machine 16 that applies tension to the foamed electric wire 9. The tension sheave 15 is provided with a position sensor 17 that detects a change in its position. The take-up machine 14 is provided with a controller 18 for controlling the take-up speed so that the tension of the foamed electric wire 9 becomes substantially constant by the sensor signal from the position sensor 17.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a foamed electric wire manufacturing apparatus for manufacturing a foamed electric wire.

[0002]

[Prior Art]

 Conventionally, this type of foamed wire manufacturing device includes a supply machine that supplies a conductor, a foaming extruder that extrudes and covers a foaming layer from a crosshead on the conductor that is supplied from the supply machine, and the obtained foamed wire is cooled. It was composed of a water tank that operates and a take-off machine that takes in the cooled foamed electric wire.

[0003]

[Problems to be solved by the device]

 In such a conventional foamed wire manufacturing apparatus, the tension of the foamed wire between the supply side and the take-up side is not stable due to the stability of the brake on the supply side, the change in the winding diameter of the supply bobbin, etc. However, there was a problem that the buoyancy floated above the water surface in the water tank due to its buoyancy, and the foaming state became unstable.

An object of the present invention is to provide an apparatus for manufacturing a foamed electric wire, which can prevent the foamed electric wire from floating above the water surface due to its buoyancy in a water tank.

[0005]

[Means for Solving the Problems]

 To explain the constitution of the present invention which achieves the above-mentioned object, the present invention supplies a conductor from a supply machine, passes the conductor through a crosshead of a foaming extruder and extrudes and covers a foamed layer. In a device for producing a foamed electric wire, which cools the foamed electric wire through a water tank and draws the cooled foamed electric wire with a take-up machine, the foamed electric wire is hung over a tension sheave between the water tank and the take-up machine, The tension sheave is connected to a tension applying machine that applies a tension to the foamed electric wire, the tension sheave is provided with a position sensor that detects a change in the position, and the take-up machine is provided with a sensor signal from the position sensor. In addition, a controller for controlling the take-up speed is provided so that the tension of the foamed electric wire becomes substantially constant.

[0006]

[Action]

 In this way, the foamed electric wire is hung on the tension sheave between the water tank and the take-off machine, and the tension is applied to the foamed electric wire by the tensioning machine via the tension sheave, so that the position of the tension sheave is changed. When the position sensor detects and the sensor signal from the position sensor is given to the controller to control the take-up speed of the take-up machine, the tension of the foamed electric wire can be controlled to be substantially constant. Therefore, it is possible to prevent the foamed electric wire from floating above the water surface due to its buoyancy in the water tank, and stabilize the foamed state of the foamed electric wire.

[0007]

【Example】

 1 and 2 show an embodiment of an apparatus for manufacturing a foamed electric wire according to the present invention. In this embodiment, the conductor 1 is supplied from the supply bobbin 2, drawn by the die 3, and taken by the supply capstan 4A and the sub-supply capstan 4B. The supply capstan 4A is rotatably driven by its drive motor 5. The supply bobbin 2, the die 3, the supply capstan 4, and the drive motor 5 constitute a supply machine 6.

The conductor 1 supplied from the supply machine 6 is passed through a crosshead 8 of a foaming extruder 7 and a foamed layer (not shown) is extrusion-covered on the outer periphery thereof to form a foamed electric wire 9. The foaming electric wire 9 is passed through the water in the water tank 10 to be cooled.

The foamed electric wire 9 coming out of the water tank 10 is taken up by a take-up capstan 12 A and a sub-take-up capstan 12 B driven by a drive motor 11, and taken up by a take-up machine 13. . The drive motor 11, the take-up capstan 12A, the sub take-up capstan 12B, and the winder 13 constitute a take-up machine 14.

The foamed electric wire 9 is stretched over the tension sheave 15 between the water tank 10 and the take-up machine 14. The tension sheave 15 is connected to a tension applying machine 16 including an air cylinder that applies tension to the foamed electric wire 9. The tension applying machine 16 of the present embodiment can set a tension of 5 to 50 kg.

The tension sheave 15 is provided with a position sensor 17 which is composed of a transmitter or the like for synchronizing with which the change in the position is converted into an electric signal for detection. The take-up machine 14 is provided with a controller 18 which controls the take-up speed so that the tension of the foamed electric wire 9 becomes substantially constant by the sensor signal from the position sensor 17.

In this way, the tension of the foamed electric wire between the water tank and the take-off machine is detected by the position sensor by changing the position of the tension sheave, and the sensor signal from the position sensor is given to the controller to give By controlling the take-up speed, the tension of the foamed wire can be controlled to be almost constant. Therefore, it is possible to prevent the foamed electric wire from floating above the water surface due to its buoyancy in the water tank, and stabilize the foamed state of the foamed electric wire.

[0013]

[Effect of the device]

 As described above, in the foamed wire manufacturing apparatus according to the present invention, the position sensor detects the tension of the foamed wire between the water tank and the take-off device by the change of the position of the tension sheave, and the sensor from the position sensor is used. When a signal is given to the controller to control the take-up speed of the take-up machine, the tension of the foamed electric wire can be controlled to be substantially constant. Therefore, it is possible to prevent the foamed electric wire from floating above the water surface due to its buoyancy in the water tank, and stabilize the foamed state of the foamed electric wire.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of an apparatus for manufacturing a foamed electric wire according to the present invention.

2 is a side view of a portion of the take-up machine of FIG. 1. FIG.

[Explanation of symbols]

1 ... Conductor, 2 ... Supply bobbin, 3 ... Die, 4A ... Supply capstan, 4B ... Sub-supply capstan, 5 ... Drive motor, 6 ... Supply machine, 7 ... Foaming extruder, 8 ... Crosshead, 9 ... Foaming Electric wire, 10 ... water tank, 1
1 ... Drive motor, 12A ... Take-up capstan, 12B
… Sub take-up capstans, 13… Winders, 14…
Take-up machine, 15 ... Tension sheave, 16 ... Tension applying machine, 17 ...
Position sensor, 18 ... Controller.

Claims (1)

[Scope of utility model registration request] 1. A conductor is supplied from a supply machine, the conductor is passed through a crosshead of a foaming extruder to extrude and cover a foamed layer, the obtained foamed electric wire is cooled through a water tank, and the foamed material is cooled. In a device for manufacturing a foamed electric wire that picks up an electric wire with a take-up machine, the foamed electric wire is stretched over a tension sheave between the water tank and the take-off machine, and a tension is applied to the tension sheave to give a tension to the foamed electric wire. Machine is connected, the tension sheave is provided with a position sensor for detecting a change in the position, and the take-up machine receives a sensor signal from the position sensor so that the tension of the foamed electric wire is substantially constant. An apparatus for manufacturing a foamed electric wire, characterized in that a controller for controlling the speed is provided.