DE670745C - Device for crowning cord inserts for pneumatic rubber tires - Google Patents

Description

Device for crowning cord inserts for pneumatic rubber tires The The crowning of cord inserts for pneumatic rubber tires has since been carried out on a ring-shaped, with regard to its cross-section correspondingly arched structural core. It will an endless cylindrical hose ring individually or in layers using a certain tension is drawn onto the arched core. Then the hose ring either by hand with the help of a spatula tool evenly on both sides placed tightly around the arched circumference of the core or by mechanical means Rolled tightly around the core by means of a flat roller.

On the other hand, it is known to crown cord inserts for pneumatic rubber tires by running a liner band on a flat drum, e.g. B. a shoulder drum, to prepare and: then the cylindrical hose ring produced in this way after removal from the drum through a suitably curved heating hose camber.

Furthermore, a device for crowning cord inserts is known, in the case of the movable on both sides of the structure core at adjusted distances from one another Grippers are provided for holding the loop ring edges by turning of face plates provided with screw threads radially in the direction of the face plate axis to be postponed. However, it is not only the screw thread of the face plates that secures no uniform displacement of the grippers in the direction of the faceplate axis, but rather The even pulling of the cord around the core is not only from the even movement of the two face plates against each other, but also depends on the uniform reduction in the diameter of the two pairs of rubber grippers. And finally, the known devices require the insertion of the hose ring rims by hand between the pairs of rubber gripper rings.

In accordance with the invention there are a number of movable pincer-like grippers arranged in the free interior of the drums, which when the two move towards each other Drums grab the outer edges of the hose ring and use levers and cam guides forced to be moved so radially and at the same time in the direction of the core that the tubular ring is pulled evenly around the core to form the tire shape will. For this purpose, a uniform crowning is achieved with simple, operationally reliable means the cord inlays achieved.

In the drawing is the device for crowning cord inserts for pneumatic rubber tires according to the invention.

Fig. R shows the device in the position after it has been pulled around of the hose ring consisting of several cord inserts around the core, while Fig. A the device at the beginning of the pulling of the hose ring around the core represents. In both figures the device is partial on the left drawn in section.

The cord inserts i run on both sides of the structural core 5 arranged drums 2 according to the known flat method. After z. B. Hydraulic moving apart of the two drums: 2 become the cord inserts are arched together as a hose ring over the structure core 5, that the on both sides of the structure core at matched intervals in the free interior of the drums 2 arranged movable gripper 7 in the then taking place against each other of the two drums 2 grab the outer edges of the hose ring i and hold. In the further course of the mutual movement of the two drums 2, the grippers 7 through the intermediary of the lever 3 and the cam guides q. necessarily so radially moved in the direction of the drum axis and at the same time in the direction of the build-up core 5, that thereby the clamped tubular ring i to form the tire shape evenly is pulled around the building core 5.

Claims (1)

PATRNTANSPRUCII: device for crowning cord inserts for pneumatic rubber tires, one of which is made from several cords on drums using the flat process Hose ring is arched over a building core and on both sides of the building core Radially movable grippers are arranged on the drums at matched intervals from one another through which the outer edges of the hose ring are pulled inwards, characterized in that a number of movable pincer-like grippers (7) in the free interior space of the drums (2) when the two drums move towards each other (2) Grasp the outer edges of the hose ring (i) and use lever (3) and cam guides (q.) in such a way forcibly moved radially and at the same time in the direction of the core (5) that the tube ring (r) to form the tire shape evenly around the building core (5) being dragged around.