SK501292013U1 - Segment driver for containers of segment structure for pneumatic tire molding - Google Patents

Abstract

A groove (6) is formed in the segment carrier (31) in which the two L-shaped clamps (7) that form the T groove (8) are removably attached.

Description

Technical field

The technical solution relates to a segment carrier of a segmental structure for molding tires with exchangeable washers, facilitating the repair of seized or damaged guide grooves formed in these carriers.

BACKGROUND OF THE INVENTION

Tires of radial construction are pressed in vulcanizing containers of segment construction. This container most often consists of a conical ring, a spacer ring, segment carriers, a top plate and a bottom plate of the container. The spacer ring and the conical ring assembled therewith are fixed to the upper plate of the double-action press, the upper plate of the container together with the segment carriers is fixed to the ram of the central piston of the press. Only the lower plate of the container is attached to the bottom plate of the press. The mold segment carriers move in the container by means of the "T" grooves milled in the segment carrier and the "T guides that are part of the conical circle. When closing the press, the segment carriers are closed over the cone of the conical ring, thereby causing radial movement of the segment carriers in the grooves of the top plate of the container. Furthermore, there is a composite radial and axial inward movement of the entrainers by means of the "T grooves in the segment carriers and the" T guides in the conical circle.

The movement is terminated by reaching the end position of the top plate of the press and locking it. When closing the casing, the grooves for the "T guides" are often laterally stressed, as the carriers define their position through the clearance when closing the container. Furthermore, in some directional treads, the segment carriers may be circumferentially moved in the direction of rotation of the mold or jacket. This results in seizure and excessive wear of the carrier grooves for the "T guides". A known embodiment of the T-grooves is shown in FIG. 3 and 4.

When opening the container, the upper plate of the press moves upwards, the segment carriers must overcome the adhesion forces of the casing compound which is molded in the vulcanized state in the tire mold mold segments. Often, the sheath also tears from the tread pattern of the mold segments during opening, when the grippers are no longer in contact with the bottom plate of the container, hanging freely, causing the segments to fall while being excessively stressed and gradually seized and deformed. . Damaged "T" grooves must be repaired by milling the entire block, then new steel blocks will be inserted into the milled groove block, in which the "T" groove will be milled again. Such repairs require shipment of the container for repair and often three to four week-long repairs, which are very costly.

The essence of the technical solution

The existing drawbacks of repairing the damaged segment carrier grooves are eliminated by the segment carrier for segment construction containers according to the invention. The essence of the technical solution is that a groove is formed in the segment carrier body, in which two shims are detachably attached to form a T-slot.

The advantage of the technical solution is that damaged inserts can be easily replaced by new inserts without having to remove the container from production. Inserts are designed as standard replacement and are available on request. It takes 3 to 4 hours to repair the container and thus puts it into operation, which significantly reduces repair costs.

BRIEF DESCRIPTION OF THE DRAWINGS

The technical solution is illustrated in more detail by means of figures, where: fig. 1 is a view of the segment structure container in an open state; Fig. 2 shows a view of a closed container;

Fig. 3 and 4 are views of a known embodiment of a "T" groove of a segment carrier, wherein the "T" groove is milled directly in the carrier body;

Fig. 5 is a view of a new embodiment of segment carriers according to the invention;

Fig. 6 shows a top view of a new embodiment of segment carriers according to the invention.

Example

The tire molding container 10 of FIG. 1 consists of a conical ring 2, a spacer ring 1, a segment carrier 3, an upper plate 4 and a lower plate 5 of the container. The spacer ring 1 and the conical ring 2 assembled therewith are fixed to the plate of a double-acting press (not shown).

The upper plate 4 of the container 10 together with the entrainers of the segments 3 is connected to a ram of a central press piston (not shown). The lower plate 5 of the container W is attached to the lower plate of the not illustrated press. The carriers of the tire molding segments 3 are moved in the container by means of the "T" grooves 8, which fit the "T guides that are part of the conical ring. are formed in the segment carrier body 31 such that a groove 6 is formed in the body 31, in which two L-shaped shims 7 are inserted and mechanically fastened to form a T-shaped groove 8 (Figs. 5, 6). The shims 7 are fastened to the groove 6 by connecting elements, e.g. screws, which means that if the shims 7 are mechanically damaged, they can easily be replaced with new shims. Depending on the type of container, there may be up to eleven segment carriers 3 in the same container, which means eleven T-slots 8 fitted with shims 7. The labor saving associated with replacing these shims 7 if damaged is so great.

Claims (1)

Claims ΝΑ PROTECTION Segment carrier of a segmented tire molding structure, characterized in that a groove (6) is formed in the body (31), in which two L-shaped shims (7) forming a "T-groove" (8) are removable.