SU759334A1 - Method of assembling rubber cord casing - Google Patents

Description

The invention relates to the manufacture of rubber-cord shells and is intended for use in the tire industry in the manufacture of rubber-cord shells of balloon type, used as pneumatic shock absorbers for vehicles and other devices.

A known method of assembling reenokordnyh shells of the ball type, in which the bead is larger than the diameter of the inter-side part, which consists in forming a rezino-cord bracelet, planting the bead rings and equipping the edges of the bracelet. According to this method, a bracelet is made with a diameter equal to the diameter of the beads, and after turning the edges, the obtained carcass is stretched along its axis until an inter-side part with the specified diameter is obtained [1],

However, due to stretching, the durability of the shell decreases.

The closest to the proposed 25 is the way in which a rubber cord bracelet is formed, having a diameter smaller than the inner diameter of the side cores of the shell, establish a con -._

2

centrally frame the side cores, unclench the edges of the bracelet, plant the side cores, loosen the edges around them And stack the rest of the parts in accordance with the casing design 1) 2).

According to this method, the edges of the bracelet are expanded to form tapered sockets at a certain distance from its ends, and then the side cores are seated and the edges turn over these sockets by their large diameters. The shape of the sides of the assembled shell does not correspond to their shape in the finished shell, therefore, when forming the assembled shell, the sides rotate at a large angle, which leads to large deformations of the side zones, causing various defects of the shell leading to a marriage and a decrease in the quality of the finished shells.

The purpose of the invention is to improve the quality of the shells.

This goal is achieved by the fact that the side bearers are installed above the middle non-expandable part of the bracelet, and when the edges of the latter are expanded, at the boundaries between the middle non-pressing 759334

my part of the bracelet and its edge edges form vertical annular areas, on which the side cores are planted, axially moving the latter from the center of the bracelet. .

When twisting the edges around the bead cores, first wrap the shirts on the outer surface of the cores, additionally fixing the latter along the outer diameter, and then perform the final twist 10 until the edges come into contact with the vertical ring sections.

In order to ensure a stable shape of the ends of the shells, before uncoupling the edges, the middle non-compressible part and the bracelet are fixed from the outer surface at the boundaries of the formation of vertical ring sections.

FIG. 1-7 shows the successive operations of assembling rubber 20

cord shells; in fig. 8 - assembled shell; in fig. 9 - the same, after molding.

On the folded assembly drum 1, a rubber cord bracelet 2 is formed having a diameter smaller than the inner diameter of the side cores of the shell and consisting of a sealing layer of rubber and the required number of layers of rubberized cord, cut at a given 30 angle.

Above the middle non-detachable part of the bracelet 2, the side cores 3 and 4 (rings or wings depending on the shell design) are installed concentrically with the use of templates 5 and b. After that, they unclench the edges b of the bracelet 2, increasing the diameter of the auxiliary drums 7. When opening the edges b 40

bracelet 2 at the boundaries between the middle of the non-separable part a and the end edges b form vertical annular areas in which the side cores 3 and 4 are planted, axially moving the latter from the center of the bracelet 2.

When pressing the templates, the cores 3 and 4 are glued to the vertical ring sections. For the best duplication of the cores with the material scrap ^e> framework appropriate to use 'cores located on the inner surface of the flipper.

'Next, holding the cores with patterns 5 and 6, turn-around 55 b edges around the side cores 3 and 4.' '' '' ^ Pr ^^^ th ^^ n'YchZhla '' EsGy'gfechYYYKY 'edge to the outer surface of the cores fixing the latter by the outer diameter, and then from ¢ 0, drive the templates' and carry out the final turning of the edges until they come into contact with the vertical annular sections in. To ensure a stable shape of the ends of the shells

four

Before unclamping the edges b, the middle non-compressible part of the bracelet is fixed from the outer surface at the boundaries of the formation of vertical annular sections, for example, using detachable clips 8. After removing the templates to the initial position, the rubber covering layer 9 and the rest of the parts are removed . The auxiliary drums 7 are folded and the assembled casing is removed, which has the form shown in FIG. 8. Then the assembled shell is subjected to molding and vulcanization, after which it acquires the final form, for example, two-cavity (Fig.9)

In the manufacture of rubber-cord shells of the balloon type according to the proposed method, the configuration and form are obtained during the assembly process, the bead is almost the same as in the molded case. Therefore, when the shell is molded, there is no reversal of the side shell part, as a result of which formation of defects during molding, such as wrinkling, delamination, sagging, removal of the side cores, etc., is eliminated. In addition, the proposed method provides for the assembly of a more stable separation of the side cores and thereby ensures the exact length of the filaments between the side cores, which improves the quality of the manufactured shells. The proposed method allows the most complete mechanization of the process of manufacturing rubber cord shells and provides increased productivity.

According to the proposed method, it is possible to manufacture shells, both single-cavity and multi-cavity, with several reinforcing rings, which are worn either during assembly or during molding of the shells.

Claims (3)

Claim 1. The method of assembling the rubber-cord shells, which consists in forming a rubber cord bracelet having a diameter smaller than the internal diameter of the side cores of the shell, concentrically forming the side cores of the shell, opening the edges of the bracelet, putting the side cores around, wrapping the edges around them and stack os-. Moutain parts in accordance with the shell design, characterized in that, in order to improve the quality of the shells, the side serres are installed. over the middle non-expandable part of the bracelet, and when unclamping the edges of the latter on the 'boundaries between the middle non-pressing 759334 My part of the bracelet and its edge edges form vertical annular areas, on which the side cores are planted, axially moving the latter from the center of the bracelet. 2. The way pop. 1, characterized in that, when turning the edges around the side cores, first the edges are wrapped on the outer surface of the cores, additionally fixing the latter along the outer diameter, and then final turning is made until the edges come into contact with the vertical ring sections. 3. The way pop. 1, characterized in that, in order to ensure a stable shape of the ends of the shells, before unclamping the edges, the average non-compressible part of the bracelet with fixed from the outer surface at the boundaries of the formation of vertical annular sections. Sources' information taken into account in the. Examination 1. USSR author's certificate No. 441165, cl. B 29 N 17/02, 1972. 2. USSR author's certificate number 253347, cl. In 29 N 17/00, 1966 (prototype) Fig 5 1 'Fig - 6