SU498174A1 - Mandrel for the manufacture of fiberglass products - Google Patents

Description

The invention is intended for the manufacture of glass fiber products of both cylindrical and conical shape, as well as long length profiles by winding a reinforcing filler impregnated with synthetic resin.

A known mandrel for the manufacture of products of long length, comprising a body composed of separate sections and mounted on a central shaft. However, such a mandrel is difficult to manufacture, it does not guarantee that the shells of a strictly defined forum and accuracy are obtained, and does not allow the manufacture of long articles of small diameter.

The purpose of the invention is to reduce the repressive force of long products (cylindrical and conical) while maintaining a given shape and size, by reducing the surface of trein noko. The goal is achieved by the fact that the central shaft is provided with rings rigidly fixed on it, installed between the sections fixed by the keyed joint, the gap between the ring and the end of the previous section being smaller than the gap between the ring and the end of the subsequent section. mandrel is made with a chamfer, and the back has a response groove.

Ia drawing shows a schematic of the proposed mandrel.

The shaft 2 / mandrels are rigidly mounted with rings 2 and sections 3 fixed by shnonki 4 on it. Sections 5 are fastened with nut 5. When the nut 5 of section 3 is unscrewed, section 3 can be moved along the shaft / distance, /, 2, / 3, /four.

The mandrel works as follows.

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Sections 5 are stiffened with nut 5, then the trimmer is placed on the winding machine, covered with a separate layer and wound. After polymerization, the finished product is removed from onravki as follows.

Unscrew the nut 5 at a distance (4), a lead is inserted into the decompressed ring (not shown in the drawing), the grip of the decompression device is attached to the shaft / and the product is removed. At the same time, the first section begins to move, it enters into operation when the shaft advances at a distance / shaft, when the shaft moves at a distance / 2 the second section enters into operation, etc.

For the mandrel to work, it is necessary that

/, / 2/3/4.

Claims (1)

Claim 30 1. A mandrel for the manufacture of fiberglass products of great length, containing a body composed of separate sections and mounted on a central shaft, which is so that, in order to reduce the de-stressing force, rings are fixed on the central shaft sections, the latter are fixed by means of a keyed joint, and the gap between the ring and the end of the previous section is smaller than the gap between the ring and the end of the next section. , 2. A seal according to claim 1, characterized in that, in order to reduce the burrs of the product surface during repressing, the front end of the mandrel section is chamfered, and the rear end - with a sheer recess.