DE1936192A1 - Method for connecting strips made of elastic material reinforced with a single layer of fabric - Google Patents

Description

PATENT LAWYERS DIPL.ING. H. LEINWEBER dipl-ing. H. ZIMMERMANN Potticheek account: Bank account: Telephone Tel.-Adr.

Munich 22045 Dresdner Bank AG. Munich (Uli) 211 »·» Ulnpat MOndim

Munich 2, Marienplatz, account no. 92790

8 Munich 2, Rosental 7,

(Ku »termann passage)

July 16, 1969

Cas 398 Z / We / RiAo

PNEUMATICiUES, CAOUTCHOUC MANUi ¹ ACTUBE ET PLASTIQUES ADHESIVE COLOMBES,

Colombes, Irankreieh

Method of joining armored with a single layer of fabric

Ribbons made of elastic material

The invention relates to a method for connecting belts made of elastic material, in particular conveyor belts made of rubber, which are reinforced with a layer of fabric to withstand the longitudinal loads to be able to withstand.

This type of tapes, the reinforcement of which consists only of a single layer of fabric to achieve longitudinal strength, is in particular Often used since the time when there was synthetic textiles, which have a particularly high mechanical strength exhibit.

In general, the ends of the tapes, the reinforcement of which consists of several layers of fabric, are connected to one another by that the various layers forming their carcass are graded in such a way that there is always one in a certain band cross-section Reinforcement layer is less than the number forming the reinforcement. The connections achieved in this way affect the Longitudinal strength of the tape to a very low degree.

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Of course, this type of connection cannot be used with bands whose reinforcement is used to achieve the longitudinal. strength has only one layer of fabric, and so far in practice these banks have not been economically satisfactory Connections possible.

The aim of the invention is a method for connecting conveyor belts od can be carried out cheaply and in which the longitudinal strength of the tape is extremely little, if not not at all is impaired, the connection achieved having a very favorable behavior towards dynamic loads.

According to the invention, the fabric or the reinforcement-forming layer at the end of the tape over a certain The length of the paneling is removed, the fabric is then cut into longest strips and the strips at one end are leaf-like inserted into one another in the corresponding strips at the other end. Then the cladding is reapplied and the tape vulcanized in the area of the joint, if

the material requires it.

In the description below is. the connection ₍ 'of the ends of a conveyor belt made of a vulcanizable mixture based on rubber is described, but the invention is applicable not only to conveyor belts, but to all belts made of elastic materials that are vulcanizable or, as in the case of thermoplastics, are not vulcanizable . '

Further advantages, details and features of the invention result from the following description. On the drawing f

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The invention is shown for example * namely demonstrate .

Fig. 1 is a plan view of the two prepared for joining Ends of a ribbon,

Fig. 2 is a perspective view of part of one of the " End up,

Fig. 3 is a plan view of the two by joining their strips interconnected ends according to Fig. 1, and

4 shows a cross section through the interconnected strips.

In this example the ends A and B of a conveyor belt 1 made of rubber are to be firmly connected to one another, their reinforcement, which is used for longitudinal strength, consists of only one single reinforcement Layer of fabric. In the following description they are corresponding reference numerals for the parts of the ends A and B with the subscripts a and b, respectively.

The cladding has been removed at both ends and the reinforcement 2 is exposed over a length L that is affected by the work tension to which the tape is to be exposed.

A compound layer is formed on the parts 2a and 2b the exposed reinforcement of rubber applied 3 after ^overall: optionally the reinforcement against this rubber beispiels-,:, by applying a Lösüngsmittelschicht, an adhesiveness was granted. ί

1 ' . i

The parts covered by the connecting layer of rubber Ie 2a and 2b are then used to form longitudinal stripes;

4 incised, which with the exception of strips 4'a and 4 * b on ^:

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the opposite sides of ends A and B equal: are wide. These strips 4'a and 4 ^f b are about half as wide as the other strip, through the lateral strip 4 and * a 4Vb SINCL the strips 4a and 4b in relation to the other by half width offset what their later Ineinandergrei - ^! fen - enables ..

Advantageously, each strip 4 runs at its end ' in a point that makes it easier to join them together later. The point further increases the elasticity of the connection. parts and makes it easier for the tape to run off onto the j guide and drive drums.

The connecting layer 3 made of rubber can also after; Instripe cutting of the ends 2a and 2b of the reinforcement are applied. In most cases, however, it is more advantageous to cut into the latter beforehand, f as described above, ₍

The strips 4a and 4b are then placed one inside the other in such a way that each strip 4a covers half a tongue 4b and even from half of that strip 4b over-] laps adjacent to the aforesaid strip 4b (Fig. 5). In this overlapped position, the strips 4a and,

... ■■■■■ - '"■ -!

4b slightly inclined in the transverse direction, as shown schematically in FIG is shown.

The nesting is carried out, for example, in such a way that the two ends A and B are brought closer together until the strips 4a and 4b overlap, whereupon all the strips 4a on one side and all the strips 4b on the other side are raised and one strip alternates 4a and a strip 4b can fall off until all strips 4a and 4b

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interlock.

The strips 4a are firmly adhered to the strips 4b through the connecting layer of rubber.

The cladding is then re-formed, and in the event of vulcanization, the material used is this vulcanized warm under pressure.

A material that can be used in the cold can also be used as a connecting rubber and to fill the panels Vulcanized state by itself.

The compound of the invention has in comparison to the known compounds numerous advantages. So it is particularly short, the longitudinal and transverse elasticity of the tape are due to the The joint is not noticeably affected and it has excellent strength against dynamic loads. By joining them together, the strips get a slightly inclined position in the transverse direction and can therefore better transfer the stresses caused by expiration of the tape on the drums on the outer sections act.

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Claims (4)

Patent claims: M .J Process for joining strips of flexible, material reinforced with a single layer of fabric, characterized in that that at the ends to be united (A, B) over a certain length (L) the surrounding cladding is removed and the exposed parts of the reinforcement to form longitudinal; strips (4a, 4b) are cut that the respective Strips of both ends (A, B) are inserted into one another in such a way that each strip (4a) of one end (A) is part of a Strip (4b) of the other end (B) covered and even partially overlapped by a strip (4b) of the other end (B) and that the cladding is re-erected on the junction if necessary. 2. The method according to claim 1, characterized in that the strips (4a, 4b) prior to being nested with a Layer (3) are provided from a connecting material. 3. The method according to claim 1 or 2, characterized in that one cuts the strips (4a, 4b) equally wide, with the exception of lateral strips (4 * a, 4 * b) which are half as wide as the others, and of which one (4 ^f a) is arranged on that edge of one end (A) of the reinforcement which is opposite the tape of the other end (B) of the reinforcement with the other narrower lateral strip (4 * b). 4. The method according to any one of the preceding claims, characterized characterized in that the ends of the strips are cut to a point. 009822/1717 Blank page