JPH0788925A - Extrusion-coating apparatus for electric wire - Google Patents

Abstract

PURPOSE:To change over a resin compd. being an electric wire coating material without stopping an apparatus. CONSTITUTION:A raw material mixer 10a for a PVC compd. and a raw material mixer 10b for a PE compd. are fixed and arranged on a stage A and an extruder 20 is fixed and arranged under the mixers. A hopper 30 consisting of the hopper elements 30a, 30b corresponding to the raw material mixers 10a, 10b is provided between the raw material mixers 10a, 10b and the extruder 20 and slid by a cylinder 32 to guide the PVC or PE compd. supplied from the raw material mixer 10a or 10b to the sub-hopper 22 of the extruder 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire extrusion coating apparatus for coating an electric wire with a resin, and more particularly to an electric wire extrusion coating apparatus capable of changing a resin compound as an electric wire coating material without stopping the apparatus.

[0002]

2. Description of the Related Art As shown in FIG. 2, an electric wire extrusion coating apparatus for performing insulation coating on a bare electric wire includes a raw material mixer 50 and an extruder 6.
It is generally composed of 0 and.

The raw material mixer 50 includes a raw material hopper 51 for containing a resin compound sucked and conveyed from a raw material tank (not shown), a colorant hopper 52 for containing a colorant, and each hopper 51, 52. It is composed of a mixer 53 for coloring the resin compound by mixing the resin compound and the colorant supplied from the mixer, and the colored resin compound passes through the coating material feeding hopper 61 of the extruder 60. It is adapted to be supplied to the extruder main body 62.

A shutter 63 is provided between the coating material feeding hopper 61 and the extruder main body 62, and the shutter 63 can be opened and closed by a cylinder 64.

[0005]

By the way, in the electric wire extrusion coating apparatus as described above, when the raw material of the coating material is changed as in the case of changing the PVC compound to the PE compound, the old material and the new material are used. In order to prevent mixing with the raw material hopper 51 of the raw material mixer 50,
It is necessary to remove the old material from all of the coloring material hopper 52, the mixer 53, and the coating material feeding hopper 61 of the extruder 60.

Therefore, when changing the raw materials, the apparatus must be stopped and the above-mentioned raw material hopper 51 and the like must be cleaned, and the cleaning work also requires some time. It was a problem.

Therefore, an object of the present invention is to improve the production efficiency by providing an electric wire extrusion coating apparatus capable of changing the raw material of the coating material without stopping the apparatus.

[0008]

In order to solve the above problems, the present invention provides a raw material mixer for mixing a resin compound and a colorant to color the resin compound, and a coloring material supplied from the raw material mixer. In an electric wire extrusion coating device comprising an extruder for coating the electric wire with the resin compound thus prepared, a plurality of the raw material mixers are provided according to the type of the resin compound, and between each raw material mixer and the extruder. A hopper that guides the resin compound supplied from the raw material mixer to the extruder is provided so that it can move back and forth with respect to the extruder,
Each hopper was provided with a hopper drive means for retracting the hopper corresponding to the unused raw material mixer from the extruder.

[0009]

[Operation] The electric wire extrusion coating device configured as described above is
When changing the raw material of the coating material, the extruder is continued with the hopper corresponding to the raw material mixer of the old material retracted from the extruder, and after the old material is completely lost, the raw material mixer of the new material is supported. The new material is supplied by moving the hopper to the extruder side.

[0010]

EXAMPLES Examples will be described below with reference to the drawings. As shown in FIG. 1, the electric wire extrusion coating device includes a raw material mixer 10, an extruder 20 and a hopper 30.

The raw material mixer 10 comprises a raw material mixer 10a for PVC (polyvinyl chloride) compound and a PE.
A raw material mixer 10b for (polyethylene) compound is used, but both raw material mixers 10a and 10b have the same structure but different feed materials.

Each of the raw material mixers 10a and 10b contains a raw material hopper 1 for containing a PVC compound and a PE compound conveyed from a respective raw material tank (not shown).
1a, 11b and a colorant hopper 1 containing a colorant
2a and 12b, and mixers 13a and 13b for mixing the PVC compound and the colorant and the PE compound and the colorant, which are supplied from these hoppers 11a, 12a and 11b and 12b, respectively, to color the PVC compound and the PE compound. And are fixedly installed on the stage A, respectively.

The extruder 20 includes an extruder body 21 having a crosshead die for coating electric wires, and the extruder body 2
1 and a sub hopper 22 for supplying the coating material to the first material, and at the position below the stage A, both raw material mixers 10
It is fixedly installed between a and 10b.

The hopper 30 is the raw material mixer 10.
A colored PVC compound or PE compound as an electric wire coating material supplied from a, 10b is guided to the upper opening of the sub hopper 22 of the extruder, and is provided corresponding to each raw material mixer 10a, 10b. It is composed of two single hoppers 30a and 30b.

The individual hoppers 30a and 30b are supported by a base 31 which slides on the upper part of the sub hopper 22 by a cylinder 32, and the bottom opening of one of the hoppers 30a and 30b is the sub hopper 22.
Of the other hopper 30b, 3
The bottom opening of the sub-hopper 0a is separated from the top opening of the sub hopper 22. However, each hopper unit 30a, 3
Within the moving range of 0b, the PVC compound and the PE compound can be always charged from the raw material mixers 10a and 10b regardless of their positions.

Further, each of the hoppers 30a and 30b is provided with a shutter 33 for closing the bottom opening thereof, which can be freely opened and closed by a cylinder 34.

In the electric wire extrusion coating apparatus configured as described above, when the electric wire coating material is changed from the PVC compound to the PE compound, first, the raw material mixer 10a.
The supply of the PVC compound is stopped, the bottom opening of the hopper simple substance 30a is closed by the shutter 33, and the base 31 is slid to retract the hopper simple substance 30a from the sub hopper 22.

At this time, the single hopper 30b is located on the sub hopper 22, but the bottom opening is closed by the shutter 33, and the wire covering material is not supplied to the extruder 20. The machine 20 uses PVC until the PVC compound in the sub hopper 22 is exhausted.
Continue extrusion coating of wires with compound.

When the PVC compound in the sub hopper 22 is exhausted, the shutter 33 is opened and the bottom opening of the hopper simple substance 30b is opened, and the PE compound is injected into the sub hopper 22 of the extruder 20.
Extrusion coating of the electric wire with the E compound is performed.

In this embodiment, two raw material mixers 10a, 1 are used to switch between two types of resin compounds, a PVC compound and a PE compound.
0b and single hoppers 30a and 30b are used, but the present invention is not limited to this, and a necessary number of raw material mixers or single hoppers may be provided depending on the type of resin compound to be switched. However, when using three or more hopper units, it is necessary to allow each hopper unit to slide independently and to control so that only one hopper unit of each hopper unit is on the sub hopper.

Even in the wire extrusion coating apparatus provided with only two raw material mixers and hoppers alone as in the above embodiment, the used raw material mixers and hoppers alone after switching are cleaned. When different kinds of resin compounds are charged, it is possible to switch three or more kinds of resin compounds without stopping the apparatus, and it is possible to improve the production efficiency.

[0022]

As described above, the electric wire extrusion coating apparatus of the present invention is provided with a plurality of raw material mixers according to the type of resin compound that needs to be switched, and is provided corresponding to each raw material mixer. Since the hopper is moved to guide an arbitrary resin compound to the extruder, it is not necessary to stop the device and perform cleaning work each time when switching the resin compound as in the conventional case, and improve the production efficiency. be able to.

Further, it can be said that the wire extrusion coating device has a low manufacturing cost and is excellent in safety because only the lightweight hopper is moved when switching.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment according to the present invention.

FIG. 2 is a schematic view showing a conventional example.

[Explanation of symbols]

 10, 10a, 10b Raw material mixer 11a, 11b Raw material hopper 12a, 12b Colorant hopper 13a, 13b Mixer 20 Extruder 21 Extruder body 22 Sub hopper 30 Hopper 30a, 30b Hopper unit 31 Base 32, 34 Cylinder 33 Shutter

Claims (1)

[Claims] 1. An electric wire extruder comprising a raw material mixer for mixing a resin compound and a colorant to color the resin compound, and an extruder for coating an electric wire with the colored resin compound supplied from the raw material mixer. In the coating apparatus, a plurality of the raw material mixers are provided according to the type of resin compound, and a hopper for guiding the resin compound supplied from the raw material mixer to the extruder is provided between each raw material mixer and the extruder. An electric wire extrusion coating apparatus, wherein each of the hoppers is provided so as to be able to move back and forth with respect to the extruder, and each hopper is provided with a hopper driving means for retracting a hopper corresponding to an unused raw material mixer from the extruder.