SU528217A1 - A method of manufacturing a pneumatic tire chambers - Google Patents

Description

The invention relates to the manufacture of pneumatic tires, and is intended for the manufacture of riding chambers.

A known method of manufacturing the driving chambers of pneumatic TIRES includes cutting the tubular billet, cutting it into cylindrical lengths, forming a torus shell by joining the ends of the tube, forming it with compressed air and vulcanizing in the mold 1. The driving chamber has a running tread using the known method and the side, which reduces its mileage.

There is another method of manufacturing the driving chambers, which includes saping a tubular billet, cutting it into dimensional cylindrical bracelets, forming a convergence of the end edges of the bracelet to its center of the torus shell, having a joint on the retaining part, molding it with compressed air and vulcanizing in the mold 2. However This method has a low productivity, since at first they form a mountain shell with a joint along the outer diameter from a cylindrical bracelet on a hard mandrel, then the torus shell is turned out m inwards, it is molded and then vulcanized.

In order to increase productivity, a method is proposed which differs from the well-known in that first a cylindrical bracelet

the concentrators are placed: - 1 but the mold half-molds fix its end edges relative to the latter, and then form a torus shell when the half-molds come together and simultaneously form a supply of compressed air to the internal cylindrical surface of the bracelet.

FIG. 1 shows extruded tubular billet; ; ia fng. 2 - setting the bracelet relative to the mold half-molds; in fig. 3 - the beginning of the molding; in fig. 4 - torus formation o60vT04KH and molding; in fig. 5 - vulcanization.

The described method can be carried out as follows.

On the screw press 1, a rubber tubular billet 2 with a diameter equal to 0.8-0.85 of the inner diameter of the finished driving chamber is placed at the free end on the guide casing 3 mounted concentrically with the mold half molds 4 and 5 of the mold. 6, they fix the end of the tubular billet relative to the half-form 5. Then, together with the billet 2, the latter is moved to the left by the distance of the required dimensional length of the cylindrical bracelet 7 (Fig. 2) and the latter is cut off. A valve 8 is inserted into the cavity of the mold 4. Then, compressed air is supplied to the inner cylindrical surface of the bracelet 7 by molding the bracelet.

(Fig. 3). Simultaneously with the approach of the semi-pho.rm (for example, moving half-mold 5 to the left to half-mold 4), the end edges of the bracelet 7 are reduced to its center, forming a torus shell (Fig. 4). After complete molding of the topping shell 9 (Fig. 5), the closure of the half-molds 4 and 5 occurs with simultaneous joining of the edges of the bracelet 7 along the bandage part of the driving chamber. Since the edges of the bracelet are still in a heated state, proper quality of the joint is ensured.

For the final molding and vulcanization, a needle is inserted into the shell 9 through the valve 8, which pierces it, and the forming and vulcanizing agent is fed through the needle.

The described method ensures the proper performance of the driving chambers and allows automation of the camera manufacturing process.

Claims (2)

1. V. V. Ragulin “Production of pneumatic women, publishing house“ Himi, M, 1965, p. 361-379. 2. Additional French patent L 871181 in class. In 29h, 1966 (prototype). Che / ysh 2