JPS5964329A - Manufacture of fiber reinforced symmetrically rotatory woundbody - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a fiber-reinforced fiber-reinforced fiber-reinforced fiber-reinforced material in which a fiber or fiber string impregnated with a curable synthetic resin 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 first volume body.

This type of wet winding method was published in patent application No. 53 in 1981.
It is described in Publication No. 322.

In this method, the fiber string generally has a higher resin coverage than that compatible with the desired resin content of the winding being produced.The fiber string is placed under tension on the core. , the excess resin (7i) collects on the surface of the individual layers or the finished roll.

This results in inaccuracies in the wall thickness of the winding, which leads to unacceptably high unbalances when the winding is used, for example, as a rotor for a centrifugal machine.

Objective of the present invention (d) In the manufacturing method as described above, the resin collected on the surface of each layer or the surface of the wound body after winding is treated in a simple and rational manner, and the individual layers are The purpose is to set the ratio of the resin component to the fiber component 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 roll body depends approximately 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 fabric 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 string are provided on the winding core 3, and these layers form a rotationally symmetrical winding 9. A storage roller l is arranged above the winding core 3, and a winding roller 2 equipped with a drive device 10 for winding up the absorbent fabric 5 is arranged below the winding core 3. The uppermost layer of the body 9 (, ξ is partially wrapped around b. The size of the contact area 7 formed at this time depends on the winding angle and the cloth 5
depends on the width of , and can therefore vary over a wide range.

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

As can be seen from FIG. 2, the manufactured roll 9 has a length several times the width IC of the cloth 5. In order to obtain a uniform treatment of the surface of the roll, the rollers l, 2 and the drive 10, including the fabric 5, are connected to one drive (not shown), by which the fabric 5 can be adjusted The core is moved along the longitudinal axis 11 at a constant speed.

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. can be determined by calculation or experiment. In that case, it is necessary to select the aforementioned operating parameters such that the excess resin is completely deposited on the fabric 5 during contact in the region of the contact zone 7.

[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. J... Storage roller, 2... Winding roller, 3...
Winding core, 5... absorbent cloth, 9... winding body.

Claims (1)

[Claims] ■) Fiber-reinforced rotationally symmetrical structure in which fibers or fiber strings impregnated with a curable synthetic resin are wound in layers on a rotating core and removed from the core after the wound body is cured. A method for producing a wound body comprising: a) after winding of the layers and/or after the production of the complete wound body, the absorbent strip is wound at a constant speed from a storage roller to a take-up roller; b) A method for producing a rotationally symmetrical fiber-reinforced roll, characterized in that the absorbent strip is partially wound onto the core between 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) The strip speed is selected so as to obtain the maximum possible resin coverage during contact of the absorbent strip with the contact area of the layer. Method. 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.