DE1190653B - Device for the flat construction of tire carcasses with bead rings - Google Patents

Description

GERMAN

PATENT OFFICE

EDITORIAL

German class: 39 a6-17 / 22

Number:
File number:
Registration date:
Display day:

1190 653
D34996X / 39a6
December 21, 1960
April 8, 1965

The invention relates to a device for the flat construction of tire carcasses with bead rings with a building drum that can be changed in diameter with auxiliary drums assigned to both sides, from which roller hoses mounted on it after the formation of contact shoulders for the bead rings in Direction of the building drum can be rolled over its jacket.

For the flat construction of tire carcasses provided with bead rings, construction devices are used known, which essentially consist of a building drum for laying the carcass webs, this drum brought from the contact diameter to a larger diameter can be, and both sides are assigned auxiliary drums that protrude beyond the building drum Take up the edges of the carcass webs on roller tubes, with these roller tubes can be inflated with the formation of contact shoulder surfaces at the bending points adjacent to the building drum and rollable onto the building drum around the edges of the carcass panels over the bead rings to hit back on the part of these tracks picked up by the building drum.

In these known designs, the roller hoses on the auxiliary drums are exclusively from, this recorded, so that always between the building drum and the roller hoses recorded by it an air gap remains, the rolling over of the edges of the carcass webs and the Centering the bead rings is detrimental in this rolling over.

In order to achieve an aligned rolling over of the side edges of the carcass panels, it is also been proposed to train these rollover hoses so that they are adjacent to the building drum Area have a greater wall thickness to ensure that rolling over takes place in the requested sequence.

Measures to avoid the risk of a gap between the bellows and the building drum and of distortions and misalignments have been tested, for example, by the rolling bellows on the edge adjacent to the building drum with reinforcements in the form of a rib or in the form were provided by embedded wire windings, have so far been unsatisfactory.

In a known device for the flat structure and the crowning of a tire carcass and Two membrane cylinders are used to roll over the side parts of the carcass inserts. To the With this device, you need to carry out the task for the flat construction of tire carcasses with bead rings

Applicant:

German Dunlop Rubber Company

Corporation,

Hanau / M., Dunlopstrasse 2

Named as inventor:

Dipl.-Ing. Dr. Wilhelm Hofferberth,

Steinheim / M .;

Dipl.-Ing. Dr. Klaus Titze, Hanau / M .;

Franz Settmacher, Großauheim

Device a pressing device for the tire beads to keep them in the correct spaced position to hold when rolling over the edges of the carcass ply. Such a pressing device is not required at the above facility. Apart from the fact that the well-known device is purely generic differs from the above-mentioned device, the elaborate roll cylinders the older facility avoided, which was only divided into three chambers by additional expansion rings are. The membrane cylinders can not be transferred to the above-mentioned device and have constructive and functional disadvantages also compared to separate roller hoses.

The invention consists in the above device that the building drum facing Ends of the roller hoses are held in the end walls of the shell of the building drum. The ends of the roller hoses are expediently in annular grooves in the end walls of the casing of the building drum held.

The measure is in a simple manner Gap between the building drum and the auxiliary drums bridged and one of the tasks set fair rolling over of the roller hoses achieved.

The inventive design also has the advantage that a lifting and distortion of the Building drum adjacent parts of the roller hoses when driving them up for the introduction the rolling process is prevented with certainty. By anchoring the roller hoses in the End walls of the shell of the building drum results

509 538/349

Furthermore, even with carcass webs already wound onto the building drum and the roller hoses, there is a clear shoulder on the front edges of the building drum, which makes it easier to attach and center the bead rings.

The device is explained in more detail below with reference to the schematically kept drawing. It shows

F i g. 1 shows a partial section through the building drum with a lateral auxiliary drum,

F i g. 2 shows the same section with the building drum brought to a larger diameter for the application of the bead rings and

F i g. 3 one of the F i g. 2 corresponding section with a partially inflated roller hose.

The built-up drum with the jacket 1, which is designed in an otherwise known manner, is assigned an auxiliary drum 2 on each side , which carries a rollable hose 3 which can be inflated. The task of the auxiliary drums 2 and the roller hoses carried by them is known per se. They form in the position according to FIG. 1 lateral extensions of the building drum and take on their side panels when winding the Karkas senbahnen. After the bead rings 4 have been put in place (FIG. 2), the side edges of the carcass webs protruding over the bead rings 4 (possibly in cooperation with enveloping cylinders) are knocked back over the applied bead rings onto the middle part of the carcass webs by inflating the roller hoses 3.

In the exemplary embodiment, the jacket 1 of the building drum is provided on both end faces 5 with an annular groove 6 in each case, in which the end of the RoIlschlauchs 3 is held.

The magnitude of the building drum and the auxiliary drum 2 with the reared Rollschläu chen 3 is dimensioned so that the diameter of the building drum in for receiving the Kar check-out lanes specific location, within the captured thereby outer diameter of not listed driven roller tube 3 on the auxiliary drum 2 is equivalent to.

It thus results from the representation according to FIG. 1 showing this position of the parts. 1 a practically cylindrical surface between the jacket surface of the building drum and the jacket surfaces of the roller hoses on the auxiliary drums 2 Carcass sheets.

In order to facilitate the introduction of the roller hoses 3 into the annular grooves 6, the auxiliary drums 2 are Provided with a sloping surface 7 on the sides facing the building drum.

After winding one or more carcass webs 8 onto the drums and the roller tubes 3 in the position according to FIG. 1 is the building drum in a known manner brought a larger diameter than the auxiliary drums 2, in which case the roller hoses 3 with the ends received by the annular grooves 6 follow this diameter expansion. The parts of the wall adjoining the ends of the roller hoses 3 lying in the annular grooves 6 the roller hoses 3 then form a conical shell, which the application and centering of the bead rings 4 facilitated, the end face 9 of the shell 1 of the building drum favoring the centering.

Claims (2)

Patent claims: 1. Device for the flat construction of tire carcasses with bead rings with an im Variable diameter building drum with auxiliary drums assigned on both sides, from from which roller hoses stored on it after the formation of contact shoulders for the bead rings can be rolled in the direction of the building drum up to its shell, characterized in that that the ends of the roller hoses (3) facing the building drum in the end walls of the casing (1) of the building drum are held. 2. Device according to claim 1, characterized in that the ends of the roller hoses (3) are held in annular grooves (6) in the end walls of the casing (1) of the building drum. Considered publications:
German utility model No. 1785 416;
French patents No. 1 224 300,
1206 023;
U.S. Patent No. 2,943,668. 1 sheet of drawings 509 538/349 3.65 © Bundesdruckerei Berlin