RU204274U1 - A device for the manufacture of composite products by winding - Google Patents

Abstract

The utility model relates to the production of products (pipes or shells) from composite materials by the winding method and can be used in the chemical and mechanical engineering industries, as well as in construction. The device contains a base 1, a rack 2 fixed to it, in which a rotatable central shaft 3 is cantilevered. , equipped with a conical element 4 fastened to it, on which an elastic sheet 5 rolled into a spiral roll is wound, the inner end of which 6 is attached along a generatrix to a conical element 4. The unwrapping of the sheet 5 has a crescent shape, and its outer end 7 has a bevel and, when rolled into roll this bevel forms a helical line. From the ends of the conical element 4 on the shaft 3 bushings 8 and 9 are mounted with the possibility of rotation, equipped with retractable rods 10. The outer end 7 of the sheet 5 is attached on each of the bushings 8 and 9 to one of the rods 10. The utility model solves the technical problem of expanding the technological capabilities of the device due to the possibility of making tapered products with a length exceeding the length of the mandrel. 5 ill.

Description

The utility model relates to the production of products (pipes or shells) from composite materials (for example, carbon fiber reinforced plastics, etc.) by the winding method and can be used in the chemical and machine-building industries, as well as in construction.

A device is known that is the closest in technical essence to the claimed object and is intended for the manufacture of products by the winding method, containing a rotating mandrel consisting of a central shaft, a shell formed by an elastic sheet rolled into a spiral, the inner end of which is connected to the central shaft, and the outer edge is made along a helical line, while its edges are fixed by end sliding elements [1].

The device [1] makes it possible to produce composite cylindrical shells of various diameters with a length not exceeding the length of the mandrel. Meanwhile, there is a large number of composite extended (up to several tens of meters) shell or tubular structures, for which a conical rather than a cylindrical shape is optimal. For example, it can be composite (mainly fiberglass) power transmission line supports, composite (mainly fiberglass) smoke or ventilation pipes with a load-bearing shaft, etc.

Thus, the disadvantages of the device [1] are:

- the possibility of manufacturing only cylindrical products and the impossibility of winding conical ones;

- limiting the length of the wound products by the length of the mandrel, the lengthening of which leads to an increase in material consumption and complication of the operation and maintenance of the device.

The utility model solves the following technical problem: expanding the technological capabilities of the device due to the possibility of manufacturing conical products with a length exceeding the length of the mandrel.

To solve this problem in a device for manufacturing products by the winding method, containing a rotating mandrel, consisting of a central shaft, a shell in the form of an elastic sheet rolled into a spiral, the inner end of which is connected to the central shaft, and the outer longitudinal edge is made along a helical line, while its the edges are fixed by end pull-out elements-rods; according to the utility model, the central shaft is equipped with a short conical element fastened to it, to which the inner end of the elastic sheet is attached. In this case, the development of the elastic sheet is made in a crescent shape and the device is equipped with a mechanism for shifting the wound product.

FIG. 1 shows a longitudinal section of the device in working position at the first stage of winding; in fig. 2 - the same, at the second and subsequent stages; in fig. 3 - section a-a in Fig. 2; in fig. 4 - view B in Fig. 3; in fig. 5 is a diagram of an elastic sheet unfolding.

The device contains a base 1, a rack 2 fixed on it, in which the central shaft 3 is cantilever mounted with the possibility of rotation. The shaft 3 is equipped with a short conical element 4 rigidly fastened to it, on which an elastic sheet 5 rolled into a spiral roll is wound, the inner end of which 6 is attached along the generatrix to the conical element 4. The unfolding of the sheet 5 has a crescent shape, and its outer end 7 has a bevel, and when rolled into a roll, this bevel forms a helical line. From the ends of the conical element 4 on the shaft 3 bushings 8 and 9 are mounted with the possibility of rotation, provided with retractable rods 10. The outer end 7 of the sheet 5 is attached on each of the bushings 8 and 9 to one of the rods 10.

The device works as follows.

In the initial state, the elastic sheet 5 is rolled into a roll on the conical element 4 and is kept from unwinding by the hoop 11, which can be removed before the start of winding. From the side of the upper (with a smaller diameter) base of the conical element 4, a disc-shaped limiting element 12 is installed on the shaft 3 with a diameter equal to the diameter of the upper (with a smaller diameter) base of the wound product 13. Turning the shaft 3 clockwise (Fig. 3), sheet 5 is unfolded until it stops from the inside into the sides of the plate of element 12, while the rotation of the sleeve 8 is locked, and on its side outside the roll of sheet 5, a replaceable limiting hoop 11 can be installed. the shell of the sheet forms the surface of a conical mandrel, the rotation of which is carried out by the bushing 8 by a drive (conventionally not shown). Due to the execution of the bevel edge of the outer end 7 of the sheet 5 in the roll, it forms a helical line and because of this is tightly pressed against the underlying layers of the roll of the sheet 5.

In the first step of winding, when the mandrel rotates, the first section 13 of a composite product, for example, fiberglass, is formed. Then, decreasing the extension of the rods 10, while holding the sleeves 8 and 9, turn the shaft 3 counterclockwise (Fig. 3), the sheet 5 is rolled up, pressing out the first section 13 of the wound product, while the disc element 12 is wound to the product 13. To facilitate removal of the product from the mandrel the outer surface of the sheet 5 may have a release coating, or the sheet 5 may be entirely made of a release material such as Teflon. By the retraction drive (not shown in Fig. 1) included in the product sliding mechanism, the disc element 12 together with the product 13 is shifted to the right, while the end of the element 12 is rotatably fastened to the rack 14, also included in the product sliding mechanism, and is movable in the horizontal direction along the base 1. Then, turning the shaft 3 clockwise (Fig. 3), the sheet 5 is unfolded until it stops against the inner surface of the left end of the wound section of the product 13, while the rotation of the sleeve 8 is locked, and from its side outside the roll of the sheet 5 can a replaceable limiting hoop 11 should be installed. Then the rods 10 are pushed out until they stop and pinched the sheet 5 unfolded into a conical shell. After winding the second section of the product, the cycle is repeated the required number of times until the wound conical product of the required length is obtained. Finally, the right end of the product can be cut to reuse the disc-shaped element 12. Also, the disc-shaped element 12 may not be removed after production, but be an integral part (cover) of the tapered product to be wound.

In comparison with the prototype, the claimed device has the ability to manufacture conical products (pipes or shells), the length of which exceeds the length of the mandrel.

List of sources used

Mandrel for the manufacture of cylindrical products by the winding method: A.S. 1054082 USSR: MKI3 B 29 D 23/12 / Astashkin V.M., Razdyakonov I.N. - Stated 07/09/82; publ. 11/15/83, Bul. No. 42: RF patent from 06.10.93.- 4 p.

Claims (3)

1. A device for the manufacture of composite products by the winding method, containing a rotating mandrel consisting of a central cantilevered shaft, a shell in the form of an elastic sheet rolled into a spiral, the inner end of which is connected to the central shaft, and the outer longitudinal edge is made along a helical line, while its the edges are fixed by end sliding elements-rods, characterized in that the central shaft is equipped with a conical element fastened to it, to which the inner end of the elastic sheet is attached, while at the end of the shell from the side of the smaller diameter, a diameter-limiting disc element is installed connected to the mechanism for shifting the wound product ... 2. The device of claim 1, characterized in that the development of the elastic sheet is made in a crescent shape. 3. The device of claim 1, characterized in that the outer surface of the elastic sheet has a release coating or the entire elastic sheet is made of a release material.

Images