JPS6246427B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for supplying glass fiber bundles and a package.

A large number of glass fibers drawn from the bushing are given a binding agent (binder), bundled into a predetermined number, and wound up as a glass fiber bundle for various purposes, such as the production of chopped strand mats (abbreviated as CM). , filament winding (abbreviated as FW)
Widely used for FRP pultrusion molding, etc.

The thickness and number of glass fibers that make up the glass fiber bundle are determined as appropriate depending on the application, but usually the thickness is 5 to 25.
μ, the number of which is about 80 to 4000 is used.

On the other hand, the number of glass fibers that can be drawn out from a bushing and wound into the same roll is limited by the size of the manufacturing equipment (for example, if the size of one bushing is too large, stable work will be difficult). Therefore, when a large number of glass fiber bundles (number of filaments) is required, multiple fiber bundles that have been wound are held in parallel and the fiber bundles are pulled out from each wound body.
This was arranged and wound again as a wound body to form a predetermined number of filaments.

However, this method not only requires the labor of rewinding, but also has the following drawbacks. That is, when a glass fiber bundle is pulled out and wound up again, the pulled out fiber bundle is sent to a winding device via a tension adjustment device and wound up, but at this time, it is likely to be subjected to friction and become fluffy.

Fluffing can be prevented by including a lubricant and a film forming agent in the sizing agent, but
Not only are large amounts of lubricants and film-forming agents required, but using large amounts of lubricants and film-forming agents also
FRP using fiber bundles as a reinforcing material has the disadvantage that the strength sometimes decreases.

Furthermore, when winding the fiber bundle again, it is difficult to make the lengths of the aligned fiber bundles exactly the same.

For this reason, when the aligned fiber bundle (referred to as a composite fiber bundle) is pulled out from the rolled body obtained by aligning the fiber bundle and winding it again (referred to as the rolled body again) through a tension adjustment device, However, the long fiber bundles become loose in the form of a loop in the tension adjustment device, resulting in problems such as obstructing the pulling out of the fiber bundles or degrading the quality of the FRP molded product obtained using the fiber bundles.

The above-mentioned difficulties can be solved by arranging a large number of wound bodies in parallel at the place where the glass fiber bundle is used, aligning the fiber bundles drawn from each winding body and sending them to the next process, such as a FW device or a pultrusion molding device. Although this is a problem that can be solved, since the number of filaments in the fiber bundles constituting the wound body is relatively small, it becomes necessary to use an extremely large number of wound bodies, which makes (1) the drawing process that much more complicated.

(2) Extra fiber bundle guides, etc. are required.

(3) Requires a large amount of floor space.

For this reason, there is a strong demand for a wound body with a large number of filaments, and the above-mentioned method is difficult to put into practical use.

The present invention is a new proposal based on studies to solve the above-mentioned difficulties. In other words, the present invention has the following features: (1) A plurality of cylindrical cylindrical wound bodies of glass fiber bundles are stacked so that the axes of the cylindrical bodies are aligned on the same straight line, and each of the cylindrical windings is A method for supplying a glass fiber bundle, characterized in that the inner ends of the fiber bundles constituting the body are aligned, the fiber bundles are simultaneously pulled out from the inside of a stacked cylindrical body, and the fiber bundles are supplied to the next process. and (2) Stacking a plurality of rolled bodies obtained by winding the glass fiber bundle into a cylindrical shape without unwinding them so that the axes of the cylindrical bodies are arranged on the same straight line to form each rolled body. A package of glass fiber bundles in which a plurality of stacks of fiber bundles are arranged and packaged in a horizontal direction by aligning the inner ends of the fiber bundles.

It is related to.

Next, the first invention of the present application will be explained in more detail.

In the present invention, a sizing agent is added to the glass fibers drawn out from the bushing to form a fiber bundle, and the glass fibers are directly rolled into a drum-shaped cake, which is then rewound. Use one that is rolled into a cylindrical shape. The number of filaments in the fiber bundle is preferably 1,500 or more, preferably 2,000 to 4,000.

Cylindrical winding bodies 1, 1' of almost the same size
are stacked so that the axes XX of the cylindrical bodies are arranged on the same straight line, and the inner terminal ends 2, 2' of the fiber bundles 4, 4' constituting each wound body are pulled out and aligned. Note that 3 is the exterior of the wound body, which is constructed by covering the wound body with a cylinder made of thermoplastic synthetic resin film and heating it to shrink it so that it adheres closely to the cylinder, and protects the fiber bundle during transportation etc. In addition to this effect, when the fiber bundle is pulled out and used as described later, even if the thickness h of the wound body is reduced, it has the effect of giving self-reliance to the wound body. Although the figure shows an example in which two winding bodies are covered with one long outer covering, the two winding bodies may be covered with separate outer coverings.

It is desirable to use two winding bodies that have the same weight, that is, the same fiber bundle length, or those that are as close as possible to each other, but industrially produced winding bodies have the same fiber bundle length. There is some variation in length.

When stacking winding bodies of different weights in this way, it is preferable to stack the winding bodies with the heavier weight at the bottom. When stacked with the heavier coils on top, the lower (lighter weight, i.e., smaller fiber bundle length) coils are used up first and the thickness h of the coils decreases. If the drawer is too small, the weight of the upper roll will cause the lower roll to fall down, making it difficult to pull out the drawer smoothly.

The aligned fiber bundles 4, 4' are pulled out from the inside of the stacked cylindrical body (inside the wound body) and supplied to the next process such as the FW process or pultrusion molding process.
At this time, it has been found that the tension adjustment device can be smoothly pulled out without causing a large amount of slack that would be a problem.

Its effect can be thought of as follows.

(1) Since the fiber bundles are pulled out through the same route, there is no difference in tension or difference in the amount of pullout due to the difference in the route, and the fiber bundles are pulled out with essentially the same length.

(2) The fiber bundle 4 pulled out from the upper (drawer side) winding body is pulled out while wrapping around the fiber bundle 4' pulled out from the lower winding body, and the fiber bundles are loosely entangled with each other. occurs.

Due to this entanglement, even if there is a difference in the length of the fiber bundles pulled out, the longer fiber bundle is pulled by the shorter fiber bundle, and the resulting slack is quickly resolved and the slack accumulates. It does not generate long loops.

(3) Since the fiber bundle has not undergone a rewinding process, its high rigidity is also considered to be effective in preventing the accumulation of slack.

The first invention of the present application is configured as described above, and accordingly has the following effects in addition to the above-mentioned effects.

(1) No rewinding process is required.

(2) Therefore, there is no need to include a large amount of lubricant or film-forming agent in the sizing agent, and a small amount of sizing agent is sufficient, and there is no risk of deterioration in the strength of the FRP.

(3) The rolled body has a cylindrical shape, so it is easier to pack than a drum-shaped one, and it can be pulled out stably by simply placing it on the floor.

(4) There is a certain limit to the total weight of the rolled body for handling purposes. The number of fiber bundles constituting each wound body of the present invention is smaller than the composite fiber bundle of the re-wound body having a predetermined number of filaments, so if the weight of each wound body is constant, the number of filaments is smaller than the composite fiber bundle of the re-wound body having a predetermined number of filaments. The length of the fiber bundle can be increased to a large extent, and therefore continuous work can be performed for a long time in the next process.

(5) It requires less floor space and is easy to pull out. Although an example in which two wound bodies are stacked has been described, it is also possible to stack three or more wound bodies.

Next, the second invention will be explained.

The second invention relates to a package suitably used for carrying out the first invention. A plurality of stacked bodies 6 described above are arranged in one or more rows in the horizontal direction and packaged by pallet packaging, box packaging, shrink wrapping by covering with a thermoplastic resin film and shrinking the film by heating, etc. .

The inner ends of the glass fiber bundles in each stack may be individually aligned and temporarily fixed, or the outer peripheral end of one stack may be connected to the inner peripheral end of the next stack to be pulled out. It may also be possible to make withdrawals possible.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram schematically showing a vertical cross section of the package of the present invention. In the figure, 1 and 1' are wound bodies, 4 and 4' are fiber bundles, 2,
2' indicates the inner end, and 6 indicates the stacked body.

Claims (1)

[Scope of Claims] 1 A plurality of rolled bodies obtained by winding a glass fiber bundle into a cylindrical shape without being unwound are stacked so that the axes of the cylindrical bodies are arranged on the same straight line, and each rolled body is A method for supplying glass fiber bundles, characterized in that the inner ends of the fiber bundles constituting the fiber bundles are aligned, the fiber bundles are simultaneously pulled out from the inside of a stacked cylindrical body, and the fiber bundles are supplied to the next process. 2 A plurality of rolled bodies made of glass fiber bundles wound into a cylindrical shape without being rolled back are stacked so that the axes of the cylindrical bodies are aligned on the same straight line, and the inside of the fiber bundles constituting each rolled body is A package of glass fiber bundles in which multiple stacks of glass fiber bundles are arranged and packaged horizontally with their ends aligned.