JPH032053B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a fiber-reinforced fiber or fiber string impregnated with a curable synthetic resin, which is wound in layers on a rotating core and removed from the core after the wound body is cured. The present invention relates to a method of manufacturing a rotationally symmetrical wound body.

This type of wet winding method is described in Patent Application Publication No. 53322 of 1981.

In this method, the fiber cord generally has a higher resin coverage than corresponds to the desired resin content of the winding to be produced. , since the fiber cord is placed on the core under tension,
Excess resin collects on the surface of the individual layers or finished rolls.

This results in inaccuracies in the wall thickness of the winding, resulting in unacceptably high unbalances when the winding is used, for example, as a rotor for a centrifuge.

The object of the present invention is to treat the resin collected on the surface of each layer or the surface of the rolled body in a simple and rational manner in the above-mentioned manufacturing method, and to improve the fiber components of each layer. The purpose is to set the ratio of resin components to a predetermined value, or to set the layer thickness on the surface of the completed wound body to a constant predetermined value.

This object is achieved according to the invention by the method defined in claim 1. Advantageous embodiments of the invention are indicated in the following claims.

According to the invention, the excess resin is sucked off and the remaining resin is evenly distributed over the surface of the individual winding layers or bodies.

In that case, the thickness of the layer of resin remaining in the layer or winding is approximately dependent on the adjusted residence time of the strip along the contact area and on the absorbency of the strip. As material for the absorbent strip, it is possible to use, for example, paper felt or textile cloth lined on one side.

Next, embodiments of the present invention will be described with reference to the drawings.
A plurality of layers of synthetic resin-impregnated fiber cord are provided on the winding core 3, and these layers form a rotationally symmetrical winding 9. A storage roller 1 is arranged above the winding core 3, and a winding roller 2 with a drive device 10 for winding up the absorbent fabric 5 is arranged below the winding core 3. It is partially wrapped around the top layer of body 9. The size of the contact area 7 formed in this case depends on the wrapping angle and the width of the fabric 5 and can therefore be varied within a wide range.

The direction of rotation of the core 3 (arrow 4) and the direction of movement of the fabric 5 (arrow 6) point in opposite directions along the contact area 7.

As can be seen from FIG. 2, the manufactured rolled body 9
has a length several times the width of the cloth 5.
In order to obtain uniform treatment on the surface of the rolled body, rollers 1,
2. The driving device 10 including the cloth 5 is connected to one driving device (not shown), and by this driving device,
The fabric 5 is moved along the core longitudinal axis 11 with an adjustable constant feed rate.

The contact pressure of the fabric 5 on the contact area 7 can be adjusted by means of a brake (not shown) acting on the storage roller 1. In order to obtain a uniform and constant resin layer on the surface of the individual layers or on the surface of the finished roll 9, the optimum winding speed of the fabric 5 and the feed speed of the winding device along the longitudinal axis 11 of the winding core are determined. It can be determined by calculation or experiment. In that case, cloth 5
It is necessary to select the aforementioned operating parameters such that during the contact in the region of the contact zone 7, the excess resin is completely deposited on the fabric 5.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of an apparatus for carrying out the method of the present invention, and FIG. 2 is a side view of FIG. 1 viewed from the direction of arrow A. 1... Storage roller, 2... Winding roller, 3...
... core, 5 ... absorbent cloth, 9 ... winding body.

Claims (1)

[Claims] 1. A fiber-reinforced rotationally symmetrical fiber-reinforced fiber or fiber string impregnated with a curable synthetic resin, which is wound in layers on a rotating core and removed from the core after the wound body is cured. A method for producing a rolled body comprising: (a) after winding of the individual layers and/or after the fabrication of a complete rolled body, an absorbent strip is wound at a constant speed from a storage roller to a take-up roller; (b) ) A method for manufacturing a fiber-reinforced, rotationally symmetrical winding, characterized in that the absorbent strip is partially wound onto the core between two rollers and pressed onto the layer under tension. 2. A method according to claim 1, characterized in that the absorbent strip is wound in a direction opposite to the direction of rotation of the core. 3. A method according to claim 1 or 2, characterized in that the band speed is selected in such a way that the absorbent band obtains the maximum possible resin coverage during contact with the contact area of the layer. . 4. A method according to any one of claims 1 to 3, characterized in that both rollers are moved at a constant feed rate along the longitudinal axis of the winding core.