SU747736A1 - Apparatus for applying the side members of pneumatic tyre thread - Google Patents

Description

(54) DEVICE FOR INSTALLATION OF THE SIDES OF THE PROTECTOR OF THE PNEUMATIC TIRE COVER

one

The invention relates to equipment for tire industry and is intended to overlay the profile sidewalls of the tread on the molded frame in the second stage of assembly of the first tire radial.

A device for imposing profile tread sidewalls is known, comprising flat pneumatic chambers located along the edges of the forming assembly drum and conical pushing domes for moving the inflated pneumatic chambers to the assembly drum 1.

During operation of this device, the sidewalls are superimposed on deflated pneumatic chambers and then the joints of the sidewalls are sealed. Air is introduced into the chambers and, swelling, they first press the lower edge of the sidewall against the frame, and due to the conical domes, the inflated chambers with superimposed sidewalls slide onto the frame. When this occurs, the duplication of the sidewalls to the frame.

A disadvantage of this device is the use of open pneumatic chambers operating under air pressure, which degrades the safety conditions of the work, as well as the loss of time for turning the sidewall from the pneumatic chambers onto the frame of the assembled bricks.

It is also known a device for applying sidewalls of a tread of a tire of a pneumatic tire, comprising a mechanism for g feeding the sidewalls of the tread, a drive for its reciprocating movement and a stitching roller 2.

A disadvantage of this device is that, due to the large number of cylindrical shape of the deflecting rollers of the sidewall feeding mechanism, as well as the cylindrical shape of the stitching roller, it cannot center and overlap the profile sidewalls of the tread.

The aim of the invention is to ensure the overlap of the profiled sidewalls of the vector and their centering.

This goal is achieved by the fact that the prikatochny roller is made in the form of a cone, the forming of which corresponds to the profile of the formed carcass in the corner of the sidewalls, and is turned with its large diameter to the side of the carcass of the tire.

Claims (2)

FIG. I shows the proposed device, a general view; in fig. 2 shows section A-A in FIG. ; in fig. 3 is a diagram of the overlap of the sidewalls with the aid of cone-shaped press rollers. The device comprises a mechanism for feeding the sides of the projector in the form of a roller table 1 with rotating support rollers 2 and bars 3 for guiding the sidewalls 4 of the tread. On the roller table 1, four rollers 5 are reinforced, which are placed in the guides 6 of the bed 7 of the device. The conveyor 1 with the help of the bracket 8 is connected with the rod of the pneumatic cylinder 9, rigidly mounted on the frame 7 of the device. The rotating support rollers 2 are mounted on the roller table 1 using bearings 10 (Fig. 2) of the spacer sleeves II, axles 12 and nuts 13. The rollers 5 are mounted using bearings 14 of the sleeves 15 and nuts 16 on the axles 17 fixed to the roller table. The rollers 5 rest on the lower plane of the guides 6 rigidly fixed on the base 7 of the device. The prikatochny roller 18 is fixed at the end of the roller table 1 by means of two liners 19, axis 20, spacer sleeves 21 and nuts 22. The roller 18 is made in such a way that its diameter DI is bordered to the side part of the frame and the smallest diameter meter d | - to the shoulder area of the tread. The forming cone-shaped roller 18 along the line of contact with the sidewall from the point to the point b is filled with a corresponding profile on the mounted frame with superimposed and stitched tread and sidewall. On the assembly drum 23, containing a diaphragm 24 and mounted on the drive shaft 25, the frame 26 mixes with the tread 27 applied and attached to it. in the following way . On the roller table 1, nkhiys in the initial position between the guide bars 3, the sidewall is laid with the outer surface downwards so that one end rests on the rolling roller 18. With the help of the pneumatic cylinder 9, the roller table 1 moves to the working frame with the pneumatic cylinder 18 In this case, the beginning of the sidewall 4 is pressed against the frame. Then the rotation of the assembly drum 23 is turned on and the sidewall 4 is transferred from the roller table 1 to the frame due to fixation. At the same time, due to the difference in rotational speeds along the larger and smaller diameters of the stitching roller 18, the required sidewall stretching takes place along the ab length of the overlap area, which allows the sidewall to be evenly laid on the curvilinear surface of the molded frame. After the sidewall has been applied, the roller conveyor 1 is retracted from the frame and the sealing operation of the sidewall joint is performed. When constructing a stitching roller, in order to find the magnitude of its larger diameter Dt, it is necessary to use the correlation ratio; , . Lh JJ, with the values of D and the tire design, and .D | constructively. In cases where the thickness of the profile sidewall increases in direction to the larger diameter of the overlap area, the value of this ratio should be taken slightly more, depending on the thickness difference across the width of the sidewall, and vice versa, if it decreases, then the ratio value should also be reduced. The device makes it possible to eliminate manual labor when performing a time-consuming operation — the imposition of the profile sidewalls of the tread on the formed frame when assembling the radial pockets. Apparatus of the invention for applying a sidewall of a tire tread to a pneumatic tire, comprising a mechanism for feeding the sidewalls of a tread, a drive for reciprocating it, and a stitching roller, characterized in that a cone, forming which corresponds to the profile of the molded frame in the zone of overlap of the sidewalls, and with its large diameter facing the side of the frame of the nozzle. Sources of information taken into account in the examination 1.Patent of France No. 2078798, cl. In 29 And 17/00, published. 1971. 2. The patent of France N ° 1560244, cl. In 29 N, publ. 1969 Sprotip). W P / J / /five / / 7