RU1792840C - Mandrel for manufacturing articles from composite materials - Google Patents

Abstract

Usage: the invention relates to equipment for processing composite materials and can be used in the manufacture of products with a spatial curvilinear axis of symmetry with a spiral-wound structure. The inventive mandrel for the manufacture of products containing a Central rod 1 mounted on it, an inflatable shell 2 with a means of changing its stiffness in the form of a piece of flexible tape 4, fixed along the generatrix along its entire length; and spiral coils 5 wound around sheath 2 at an angle of 5B-86 ° to the axis of symmetry, segments of the tape 4 are placed on the part of the generatrix in the places of changing the curvature of the axis of symmetry of the shell 2. 2fil.

Description

figure 1

The invention relates to equipment for processing composite materials and can be used in various sectors of the national economy in the manufacture of tubular products with a spiral wound structure and with a curvilinear axis of symmetry, ..; ....

A known mandrel for the manufacture of products from composite materials, containing a central rod, an inflatable shell mounted on it with a fitting for supplying a working fluid therein under pressure and means for changing its rigidity in the form of a flexible tape fixed along the entire generatrix and wound on the shell at an angle of 55- 86 ° to the axis of symmetry of the spiral intersecting turns. ; . .. ...: ...

However, the known implementation of the means for changing the stiffness of an inflatable shell does not allow n: to obtain yzdeliya: with the spatial curvature of the axis of its Symmetry,; .

Це / 1ь | 6: and on the other hand, there is an expansion of technological capabilities of the frames.

And ... .-. -; {: (-H.;. H;:;. ..

 In FIG. 1 pokayang general view of the mandrel; in Fig.2 - diagram of the formation of the product on

mandrel J; :; / :: g; -. 7 hours 7 Mandrel for the manufacture of products from

composite mothal coctOWT - from the central rod 1, an inflatable shell installed on it, 2, a nozzle 3 for supplying a working medium under pressure and means to give the shell 2 a predetermined rigid ™, made in the form of pieces of flexible tape fixed to the shell 2 located along part of its generatrix with offset from each other and intersecting spiral coils 5 at an angle of 55-860 to the axis of symmetry of the mandrel. In this case, the fastening of the segments 4 of the flexible tape at the ends of the mandrel is carried out by circular turns b of a material similar to the material of the spiral turns 5, and the intermediate ends of the segments 4 by additional ring turns 7 located in the zone of variation of the spatial curvature of the axis of symmetry,

A mandrel for manufacturing products from 5 composite materials is used

in the following way.

.On the central rod 1, an inflatable shell 2 is installed and its nozzle 3 is connected to the medium supply system 0 under pressure p. After that, segments 4 of the flexible tape are laid on the sheath 2 along the generatrices, secured with their end faces and add ring rings b and 7. The magnitude1 of their displacements of the segments 4 relative to each other and the location of the additional ring turns is determined by the zone of change of curvature of the axis of symmetry and the angle of its rotation. Then, on the shell 2, with the fasteners 4 of the flexible tape 0 fixed on it, they are wound together with intersecting spiral coils 5 at a given angle iy, which lies within 55 ° to 86 ° to the axis of symmetry. v:; : -; - .: v ..; v; ; -l-- 7 v v ..-;: / .-. : .. (.,. Under btOfflated & in this way, mandrel 5 enters the product winder: After winding the product, the central rod 1 is removed from the assembly and the pressure P + Rdop is created inside the sheath 2. At the same time, the mandrel deforms and twists its The axis of symmetry agrees with the location of the means due to its rigidity, and deforms in the same way the workpiece blank wound on it /.; G;;

/ Then, the mandrel with the preform is installed 5 in a heating cabinet, where the binder is polymerized. After that, the pressure in the casing 2 is released and removed from the molded product.

Thus, the proposed implementation of the mandrel allows to expand its technological capabilities by creating conditions for the spatial curvature of the axis of symmetry, which ultimately ensures the formation of, for example, 5 curved tubular products.

Claims (1)

The claims A mandrel for manufacturing products from composite materials, comprising a central rod, an inflatable shell mounted on it with a fitting for supplying a working medium under pressure and means for changing its rigidity, made in the form of a piece of flexible tape fixed along the forming shell and wound under it an angle of 55-86 ° to the axis of symmetry of the intersecting spiral turns of fibrous material, characterized in that, in order to expand the technological capabilities of the mandrel, pieces of flexible tape are placed on forming a shell in a change of curvature of its axis of symmetry. W