JPH0155725B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for applying a powder, such as talc, to a running wire, such as a cable core.

When extruding a synthetic resin coating onto a cable core, a release agent such as talc is added to the surface of the core to prevent scratches between the core and the coating, or between the coatings in double coatings. A commonly used technique is to extrude a resin after adhering a powder such as the following.

For this reason, conventionally, as shown in FIG.
Powder is applied to the filament 1 while the filament 1 is traveling through a container filled with powder. As a result, the extrusion coating device 8 adheres to the filament 1.
A fan 101 disposed inside the container is designed to rotate and stir the powder so that no cavities are formed in the powder layer being transported.

However, the fan 101 in such a conventional device cannot sufficiently stir the powder 7, and as a result, traces of running of the filaments remain as thin cylindrical cavities (bridges). However, there was a drawback in that the powder could not be sufficiently attached to the filament.

Analyzing the reason for the inconvenience of the conventional device, it is found that it is not possible to immediately replenish the hot position of the powder that has adhered to the moving linear body and been carried out with another powder. That is, in the conventional apparatus, it is thought that blistering occurs because sufficient kinetic energy is not imparted to the powder over the entire traveling path of the filament.

The present invention was made based on such an analysis of the prior art, and consists of disposing a large number of vibrating bodies at positions close to a portion or the entire area of the travel path of the filament body to suppress the vibrations. The idea is to prevent the formation of bridges by imparting vibrations to the powder near the travel path of the filament through the body.

The structure of the present invention will be explained in detail below with reference to FIG. 2 showing an embodiment of the present invention. In FIG. 2, a vibrator 3 for giving vibration to the lid 21 is attached to the upper surface of the lid 21 which forms the ceiling of the container 2 containing the powder 7.
A supply hopper 4 is provided for replenishing.

A large number of vibrating bodies 5 are provided in a suspended state on the lower surface of the lid 21 of the container 2, that is, inside the container 2.
The vibrating body 5 is made up of, for example, a large number of small steel balls 52 that are attached in a straight line. It is being

Next, the method of the present invention using the device of the present invention will be explained. A filamentous body 1, such as a cable core, to which powder is to be attached is caused to run vertically through the container 2, and at the same time, the vibrator 3 is operated to vibrate the vibrating body 5 through the lid body 21. Make it vibrate at some point. In this way, the vibration of the vibrating body 5 immediately gives energy to the powder 7 surrounding it, and the striated body 1
The powder 7 vibrates at high speed over a wide range along its travel path. For this reason, the powder carried away by the passage of the filament 1 is immediately followed by the next powder. In this way, the striatum 1 is sufficiently coated with powder 7.
The adhesion is carried out.

Furthermore, when the amount of powder 7 in container 2 decreases, the supply hopper 4 is activated and powder 7 is continuously replenished into container 2 one after another, thereby ensuring that the container 2 always retains an appropriate amount of powder. become.

FIG. 3 shows another embodiment of the present invention. In this embodiment, in order to vibrate the vibrating body 5 more effectively, the lid body 21 on which the vibrating body 5 is attached is connected via a support spring 9. It differs from the embodiment shown in FIG. 2 in that it is supported by the container 2.

FIG. 4 shows yet another embodiment of the invention.
In this embodiment, the vibrating body 10 is an elastic member such as a piano wire, and is characterized in that a large number of vibrating bodies 10 are installed on the bottom plate 23 of the container 2. In this embodiment as well, the bottom plate 23 is supported by the support spring 9 and is not fixed to the main body of the container 2, so that it is easily vibrated by the vibrator 3 attached to the bottom. .

As detailed above, according to the present invention, the powder 7 along the travel path of the filamentous body 1 in the container 2 is rapidly and effectively vibrated, so that it is carried out one after another by the filamentous body. After the powder exits to the outside, surrounding powder flows in one after another, and as a result, the traces of travel in the striatum do not become hollow, and a sufficient amount of powder can be attached to the striatum. .

[Brief explanation of drawings]

FIG. 1 is a simplified side view showing an example of a conventional device;
Fig. 2 is a perspective view showing one embodiment of the present invention;
FIG. 4 is a simplified side sectional view showing another embodiment of the present invention. 1... Striatum, 2... Container, 3... Vibrator, 4
...Supply hopper, 5,10...Vibrating body.

Claims (1)

[Claims] 1. A filamentous body 1 is run in a container filled with powder 7 to be deposited, and a large number of vibrating bodies 5, 10 are disposed near the filamentous body 1. A method for attaching powder to a traveling filament, the method comprising applying vibration directly to the powder near the filament by vibrating the powder. 2. A container 2 filled with powder to be attached;
A device for attaching powder to a running linear body, characterized by having a large number of vibrating bodies 5 arranged on the container lid 21 or the bottom plate 23 along the vicinity of the linear body running inside the container. . 3. The device for adhering powder to a traveling linear body according to claim 2, wherein the vibrating body disposed on the lid body 21 is formed by linearly connecting metal balls. 4. The apparatus for attaching powder to a traveling linear body according to claim 2, wherein the vibrating body disposed on the bottom plate 23 is an elastic member.