JPS6348674Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is used to improve the abrasion resistance and chemical resistance of paint films in linings and coatings, and to improve the durability of glass fiber reinforced plastics (FRP). , and relates to an apparatus for producing glass flakes (scale-like or powder-like) to be mixed in them.

More specifically, as illustrated in the schematic diagram of the configuration in FIG. The present invention relates to a glass flake manufacturing apparatus having a configuration configured to crush thin film glass 6 formed by pumping gas through trachea 5 to obtain glass flakes.

Glass flakes and paints mixed with them
Glass flakes are coated with a silane coupling agent that enhances their bonding with the base material (matrix) such as FRP, and other treatment agents as necessary. Since this was applied to flaky or powdered materials, the application rate was low and the application was uneven.

In other words, a method is known in which a treatment agent is sprayed onto the glass flakes while they are flowing, and then dried. The probability of a single flake colliding with the processing agent mist is low;
Furthermore, it is almost impossible for each flake to adhere uniformly to the entire surface. In other words, with the conventional means, many defective products were produced due to uneven application of the processing agent.

The purpose of the present invention is to solve such problems.

The configuration according to the gist of the present invention is as follows [] and [] based on the configuration described above []. In order to facilitate understanding, the description will be given with the numbers used in the drawings of the embodiments.

[] Flows down from the tank bottom hole 2 of the glass melting tank 1,
A nozzle 8 for spraying a surface treatment agent onto the outer surface 9 of the thin film glass 6 is provided beside the path of the thin film glass 6 formed by gas pumping. It is desirable that the position, number, and spray angle of such nozzles 8 are set so as to form a layer of treatment agent with a (substantially) uniform thickness over the entire outer surface 9 of the thin film glass 6.

[] In order to thin the molten glass flowing down from the tank bottom hole 2, a surface treatment agent is supplied to the inner surface 10 of the thin film glass 6 to the air pipe 5, which is provided with the lower end outlet 4 facing the tank bottom hole 2. A route 11 is arranged.

There are at least the following two ways of arranging the supply path 11.

(a) When the supply route 11 is the conduit of the air pipe 5 itself. That is, the surface treatment agent is mixed in the form of mist into the gas passing through the air pipe 5 in advance.

(b) A case where a special pipe 12 for a surface treatment agent is inserted into the air supply pipe 5 and the pipe line of the dedicated pipe 12 is used as the supply route 11.

In any case, the thin film glass 6 is filled with a mist of the surface treatment agent, and a layer of the treatment agent with a (substantially) uniform thickness is formed over the entire inner surface 10 of the glass.

That is, according to the above configurations [] and [], in obtaining surface-treated glass flakes, at the stage of thin film glass before being crushed into flakes,
Since the atomized surface treatment agent is applied to the inner surfaces of these surfaces and the outer surface of the thin film glass after passing through the pull roller, it is easy to uniformly and sufficiently apply the agent over the entire surface. Therefore, the glass flakes obtained by crushing the thin film glass treated in this manner are of extremely high quality in terms of surface treatment agent application.

Note that no surface treatment agent is applied to the edges of the flakes, but the thickness of the flakes is extremely small, about 2 to 6 microns (in contrast, the size is about 40 to 1000 microns).
Since the total area of the edge is tiny compared to the total surface area of the flake, even if the edge is bare, there is almost no problem.

Furthermore, since the surface treatment agent is applied during the glass flake production process, productivity is much better than when the accumulated flakes are handled for surface treatment after production is completed. Examples of the present invention will be described below.

[First embodiment] See Figure 2.

1 is the glass melting tank, 2 is the tank bottom hole, 3 is the tank bottom hole 2
The molten glass flows down from the tank, and 5 is an air pipe whose lower end discharge port 4 faces the tank bottom hole 2. 6 is air pipe 5
It is thin film glass that is inflated and thinned by compressed gas from the glass and pulled in by pull rollers 7, 7.

Below the pull rollers 7, 7, two surface treatment agent spray nozzles 8 are installed beside the path of the thin film glass 6.
~ Several are provided. These spray nozzles 8
is provided surrounding the thin film glass 6 and facing toward the center, and uniformly sprays the surface treatment agent onto the outer surface 9 of the thin film glass 6.

As a supply route 11 for the surface treatment agent to the inner surface 10 of the thin film glass 6, the conduit itself of the air pipe 5 is used.

[Second Embodiment] See Figure 3.

In order to provide a supply route 11 for the surface treatment agent to the inner surface 10 of the thin film glass 6, a surface treatment agent exclusive tube 12 is inserted concentrically into the air pipe 5, and this conduit is used as the supply route 11. This dedicated pipe 12 protrudes below the discharge port 4 of the air supply pipe 5 and supplies the surface treatment agent to the inner surface 10 of the thin film glass 6 in a low temperature region where the temperature decreases as it flows down. In this case, the probability of cracking of the thin film glass 6 is lower than in the case of the first embodiment, and the adhesion state of the surface treatment agent is also good.

The other configurations are the same as those in the first embodiment.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram of the structure, FIG. 2 is a sectional view of the first embodiment, and FIG. 3 is a sectional view of the second embodiment. DESCRIPTION OF SYMBOLS 1... Glass melting tank, 2... Tank bottom hole, 4... Lower end discharge port, 5... Air supply pipe, 6... Thin film glass, 8
...Nozzle, 9...Outer surface, 10...Inner surface, 11...
...Supply route, 12...Special pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] Formed by forcing gas into the molten glass flowing down from the tank bottom hole 2 of the glass melting tank 1 from the air pipe 5 whose lower end discharge port 4 faces the tank bottom hole 2. This is a device for crushing thin film glass 6, in which a nozzle 8 for spraying a surface treatment agent onto the outer surface 9 of the thin film glass 6 is provided beside the path of the thin film glass 6, and the air pipe 5 A glass flake manufacturing apparatus is provided with a supply path 11 for a surface treatment agent to the inner surface 10 of the thin film glass 6. The glass flake manufacturing apparatus according to claim 1, wherein the supply route 11 is a conduit of the air pipe 5 itself. The glass flake manufacturing apparatus according to claim 1, wherein the supply path 11 is a surface treatment agent dedicated tube 12 inserted into the air pipe 5.