SU1168436A2 - Device for applying tread band - Google Patents

Abstract

DEVICE FOR THE IMPLEMENTATION OF THE PROTECTOR WITH THE TAPE according to the author. St. No. 1034921, characterized in that, in order to expand the technological capabilities of the device, it is equipped with a mechanism mounted on a pivoting arm between the drum and the feed roller to fix the front part of the ribbon feed kinematically connected with the blade cutting drive, which is spring-loaded relative to the mechanism for fixing. (L 9d eo 4 00 9d

Description

1 The invention relates to equipment for tire industry and tire repair, it is intended for the manufacture of protective blanks using the method of crimping a wide, extruded tape on a frame with a removable tire, a belt bracelet or a tire being repaired and is an improvement of the device according to the author. St. No. 1034921. The purpose of the invention is to expand the technological capabilities of the device. FIG. 1 shows the proposed device, a general view; in fig. 2 fixation mechanism; in fig. 3 is a section A-A in FIG. 2; in fig. 4 scheme of winding ribbon; in fig. 5, a scan according to BB in FIG. 4. The device contains a feeder in the form of a syringe 1, which syringes tape blank 2 (Fig. 1), an assembly drum 3 with its rotational drive (not shown), supporting rollers 4 and 5, a compensating roller 6 mounted on the rotary lever and kinematically associated with the drive 8, the feed roller 9 with the brake device 10 (FIG. 3), the pinch roller 11c by the drive 12 thereof. tighten to the feed roller 9, the roles of 13 s. drive 14, stitched rollers 1 driven from the stump of the motor cylinders 1, the drive 17 for swinging the lever 7 and the right mechanism 18 (figure 1). The kinematic coupling of the feed wheel 9 with the drive 8 is made in the form of a reducer 19, chain gears 20 and 21, sprockets 22 and 23, and electromagnetic clutch 24 (Fig. 3). The device also contains a mechanism for fixing the front section of the ribbon feed code, performed in the form of a freely rotating roller 25 mounted on a pivot arm 7 between the drum 3 and the feed roller 9 and the pressure pad 26 installed above it, partially covering the surface of the roller 25 and connected to the drive 27 of the knife 28 for transverse cutting of the ribbons 2, the knife 28 being mounted above the roller 25 of the fixing mechanism and spring-loaded relative to the pressure pad 26 by the spring 29 (FIG. 2). . In this case, the knife 28 and the pressing pad 26 have a coating made of a material having a low 6 adhesion to rubber compounds, for example, fluoroplastic. Before the cycle of winding of the tread blanks, the adjustment mode of the device operation is carried out, which is as follows. When the syringe machine 1 is turned on, the front edge of the syringe band 2 is supported through supporting 4 and 5 and compensating 6 rollers between rollers 9 and 11 under press clamp 26 on roller 25, the block is pressed and after forming roller 6 from ribbon blank 2, the required sag loop is swivel the lever 7 is driven by the actuator 17 to the assembly drum 3 and the roller 25 is pressed against the surface of the drum 3. When the electromagnetic clutch 24 is turned on and the brake device 10 is retracted, the drum 3 is activated and the pressure pad 26 at the same time being retracted. The ribbon 2 begins to namshats on the drum 3, while the stitching rollers 16 are retracted. The predetermined stretching of the front end of the belt in the adjustment mode is carried out by selecting the rotational speed of the drum 3. The roller 11 is loaded by the drive 12 to the surface of the roller 9 and limits the length of the stretch section. Next, the drive of the drum 3 stops, the tape is simultaneously pressed by the pad 26 and cut on the roller 25 by the knife 28. Under the action of the drive 27, the pressure pad 26 presses the stretched tape end to the roller 25, while between the rollers 9 and 25 the decreasing width is fixed and caliber in the direction of supply section 30 of the tape 2 (Fig. 4 and 5). The pivot arm .7 is retracted by the actuator 17, and the rubber mixture wound onto the drum during adjustment is returned to the feeding hopper of the syringe machine 1. The syringe tape 2 at this time accumulates under the weight of the compensating roller 6 in the form of a loop. The device is ready for operation (Fig. 1). Further, the operation of the device is carried out in an automatic mode in the form of sequentially alternating technological cycles, which are carried out as follows. As soon as the tape 2 is extruded under the weight of the compensating roller 6 forms the necessary slack loop, the tape is fed by the pivoting lever 7 to the assembly drum 3, the clamping pad 26 and the pressure roller 11 are retracted (the tape 2 is held on the roller 25 due to adhesion) assembly drum 3 and refueling the tape on the blank tire. The electromagnetic clutch 24 is disconnected. The elongated section 30 (Fig. 5) of the tape 2 is wound on a tire blank, forming the beginning of the first layer. Then the pivoting lever 7 is retracted to its original position (Fig. 1). The rest of the first layer and the second layer are wound with a tape with a constant width corresponding to the width of the base of the Protector, and a caliber that is tension-free is selected from the compensating loop. When winding the subsequent layers, the tape is stretched in the direction of selection in accordance with the specified trapezoidal tread profile, changing the drive speed of the assembly drum 3 accordingly with the program mechanism 18 with each turn of the assembly drum. The electromagnetic clutch 24 is hereby turned on, the pressure roller 11 presses the tape to the feed roller 9 by the drive 12, and the feed speed of the tape 2 by the feed roller 9 is approximately equal to the speed at which the tape emerges from the syringe blade 1. The roll-on roll is carried out by pressing rollers 16

At the same time, transitional sections 31 and 32 of tape with decreasing width and caliber in the direction of selection, which are formed during the transition from one drawdown stage to another between the feed roller 9 and the assembly drum 3, are laid, combining their beginning with the beginning of the first layer 30 having pre-stretching, reverse changes in width and caliber (Fig. 4 and 5). This makes it possible to maximally bring one to another the cross-sectional area and the height H along the perimeter of the winding projection blanks. After winding the protect of the billet with a specified number of layers, the pivot arm 7 moves to the assembly drum 3 by means of the drive 17, the drive of the drum 3 and the drive roller drive 8 stops, the electromagnetic clutch 24 is turned off, the braking device 10 brakes the feed roller 9, the pressure pad 26 under the action of the actuator 27 presses the elongated end of the tape to the roller 25, while between the rollers 9 and 25 is fixed reducing along the width and gauge in the feed direction section 30 of the tape 2. At the same time, the ribbon is cut the knife 28. The pivoting lever 7 is retracted to the initial position, the roller 13 under the action of the actuator 14 pushes the end of the tape 2 to the drum 3, a housewife occurs and the rear end of the tape is rolled. The final rolling is carried out with the help of the stitching rollers 16. While the assembly drums change, the syringe tape 2 accumulates under the weight of the compensating roller 6 in the form of a loop. Then the cycle of winding is repeated in the sequence given.

At the same time, in the device of the second layer, it can either be completely superimposed with a width equal to the width of the base of the tread and a caliber equal to the caliber of the tape at the end of the first layer (Fig. 5), or compensate with such a width and caliber the deflection caused by the preliminary stretching of the front section of the first layer its width from the nominal only part of the length of the layer.

The winding variant (Fig. 5) allows the tread cross-sectional areas to be as close as possible along its perimeter, and it is preferable to use it in the proposed device from the point of view of maximally reducing the tread imbalance caused by the transitional areas.

The design of the device makes it possible to implement, without readjustment, other technological variants of the tread application process. For example, when the pinch roller 11 is lifted, the variant is implemented without separating the free take-off and stretching the belt sections, and when an additional knife is installed under the feed roller 9, the technological process is implemented in which the tread is applied without preliminary stretching the front section of the ribbon.

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Claims (1)

DEVICE FOR OVERLAYING PROTECTOR BY TAPE by ed. St. No. 1034921, with the proviso that, in order to expand the technological capabilities of the device, it is equipped with a mechanism mounted on a rotary lever between the drum and the feed roller for fixing the front section of the ribbon supply kinematically connected with drive knife for cutting the ribbon, which is spring loaded relative to the mechanism for fixing.