LT5368B - Destructing device of rubber shell of worn tyre - Google Patents

Abstract

A device can be used for recovering of rubber shell of worn tyre in method of ozone treatment. A device comprises a rectangular frame which is connected to a bottom which is irregularly - shaped upturned pyramid. A movable platform is placed in a frame on which are disposed force equipment for generating mechanical tension in a shell of a tyre and for fixing tyres before processing. Collectors with nipples and muzzles for supply of reagent for example ozone on surface of processing tyres are placed on longitudinal walls of frame and a cover of a device. Working of force equipment is ensured by gears provided with rotary muffs. A bottom of a device comprises two butchers with automatic hatches. One of butchers can be used for receiving of steel and synthetic cord, a second - for rubber crumbs. A sieve with mortise gaps is placed on a wall of device, which is connected with rubber crumbs of receiving butcher.

Description

The proposed equipment is intended for use in the recycling technology of worn tires. The main intended use is for use in ozone-depleting rubber wrapping technologies. The device can be used in technologies with combined methods of applying mechanical tension and combined tire disassembly techniques.

Various designs of worn tire breakers are known. Usually the method of disassembly determines the design of the unit.

OK Technology (Thai) Ltd. uses ozone depletion technology. The tire casing uses a device consisting of a steel body with hinged covers. Inside the casing are mechanisms for creating tension in the casing. The mechanisms are made of steel strips with triangular gears. The straps move thanks to powerful hydraulic drives. The unit is designed to recycle large volumes of tires, approximately 30-50 units. The design disadvantages of such a device:

- uneven mechanical stresses in the tire casing;

- non-uniform distribution of ozone over the surface to be treated;

- increased loadings of the power mechanisms to create mechanical stresses;

- high energy consumption.

Known constructions of tire breakers, e.g. 5, 492, TPK B29B17 / 02. This patent proposes a vertical type device. The machine uses two pairs of press rollers to create mechanical stresses. The recyclable tire is fed from the top and fits consistently into each pair of rollers. As the wheels move between the rollers, the tire is compressed and subjected to mechanical stresses. The rollers are equipped with two gears. One gear is designed to start pivoting of the drive rollers, the other gear provides clamping forces when the tire is squeezed. A tube is mounted on the wall of the unit with openings for supplying ozone to the surfaces of the tire being recycled. As the tire slides between the rollers and feeds ozone, the rubber shell breaks down. The design of the device has the following disadvantages:

mechanical stresses in the tire casing are unevenly distributed, causing uneven tire casing;

² EN 5368 B

- the ozone is fed from one side and the rubber is disintegrated on the side where the ozone falls;

- more than 25% rubber remains on the steel and synthetic cord, requiring several additional technological operations to separate the rubber from the cord.

Other known designs of tire wrappers are those described in the following patents:

U.S. Patent 5, 120, 767, NIK 209/11, 209/45, 209/46;

U.S. Patent 5, 503, 618, NIK 209/45, 209/11, 209/46;

U.S. Patent 5, 794, 861, NIK 241/1, 241/41, 241/65;

U.S. Patent 6,057,015, NIC 209 / 11,209 / 45,209 / 46;

U.S. Patent 6, 354, 523 JI, NIC 241/19, 241/21, 241/23;

U.S. Patent 6, 425, 540, NIK 241/41, 241/65;

U.S. Patent 6, 481, 650, NIK 241 / 24.15, 241 / 24.17 241/73;

U.S. Patent 6, 726, 136, NIK 241/65;

Russian patent no. 2060882, TPK B29B17 / 02;

Russian patent no. 2111859, TPK B29B17 / 00;

Russian patent no. 2123425, TPK B29B17 / 00, B02C18 / 44;

Russian patent no. 2144461, TPK B29B17 / 00.

The main difference with the proposed unit is that the unit has an auto-lifting platform on which power units are placed to create mechanical stresses in the tire casing. The aforementioned devices are also tire holders. The unit consists of a rectangular body and a bottom connected to it, which is constructed as an irregular inverted pyramid. The unit housing has a door that seals the internal volume of the unit. Guides are attached to the housing cover and the platform is positioned. Manifolds with nozzles and nozzles to supply reagent such as ozone are installed on the longitudinal walls and cover of the housing. The tubes are equipped with controls for adjusting the reagent delivery angle. The gear unit cover is fitted with actuators which ensure the operation of the power units. The bottom of the unit has hoppers with automatically functioning closures. One of the bunkers for steel and synthetic cord ³ EN 5368 B other - rubber fragments. There is a sieve with grooves on the wall which is connected to the rubber bunker receiving bin.

Brief Description of the Drawings In which:

FIG. 1 is a general view of the tire casing disassembly;

FIG. 2 is a cross-sectional view of the device chamber;

FIG. 3 is a general view of the device's mobile platform;

FIG. 4 is a general view of the platform power unit.

FIG. Figures 1 and 2 are general views and sectional views of a worn tire wrapper. The device consists of a rectangular chamber 1 with a lid 2. A bottom 3 is connected to the chamber 1 from below, which is constructed in the form of an inverted irregular pyramid. The chamber 1 has hinged doors 4 and 5. The manifolds 6 are provided on the longitudinal walls of the chamber 1 and the lid 2 with flanges and nozzles for supplying reagent (ozone) to the surface of the recycled tires 7. The chamber 1 is also provided with air inlet and outlet nozzles 8 and 9 and a nozzle 10 for directing the spent ozone-air mixture. The bottom 3 has a bottom 11 having a hopper 11 with a closure 12 and another hopper 13 with a closure 14. A sieve 15 is provided on the sloping bottom wall 3 having grooves. Stands 16 attached to the cover 2, on which the guides 17 are mounted, are mounted on these movable platforms 18 (see Fig. 3), which are provided with support rollers 19. Thanks to the rollers 19, the platform 18 moves the guides 17. The platform 18 is provided with coupling mechanisms 20, as it moves into chamber 1 or outside the chamber by conveyor. The mechanisms 20 are mounted on beams 21 and 22. Power units 24 are provided on the longitudinal beam 23 for securing the tires 7 and creating mechanical stresses therein. The cover 2 is provided with pivoting sleeves 25 with actuators 26. FIG. 4 shows a device 24. The device consists of saddles 27 which create tensions in the tire casing 7. The tire is fixed by screw 28 with left and right-hand threads. Screw 28 is aligned with nuts 29 and 30, which have right and left threads, respectively. As the screw 28 rotates, the nuts 29 and 30 move about it. The nuts 29 and 30 are secured in housings 31 and 32 with eyelets 33. The screw 28 is secured between the support sleeve 34 and the mounting flanges 35 by the stands 36. The saddles 27 are connected by telescopic guide rods 37 to the support sleeve 34 and the spacers 38 to the housings 31 and 32. Between the screw 28 and the support nozzle 34, a liner 39 of fluorine plastic is mounted. The upper end of the propeller 28 is provided with a component semiconductor 40. The machine end of the propeller 28 has a ball support 42 secured in the housing 43. A piston 44 is provided between the flanges 35 to engage actuation 26 of the pivot sleeve 25.

The device works this way. The recyclable tires 7 are mounted on the device 24 of the platform 18. When the tire is mounted on the device 24, mechanical stresses are exerted on it. The platform 18 with attached tires 7 is placed inside the chamber 1 of the device 1. The platform 18 automatically slides into the chamber 1 when one of the doors is opened, e.g. the door 4. The platform 18 slides on the guides 17 on the rollers 19. The platform 18 the half-sleeve 40 of the device 24 would coincide with the shaft 41 of the pivot sleeve 25. After locking the platform 18 in chamber 1, the door 4 closes. Doors 5 and closures 12, 14 are respectively closed. In a combined method of applying mechanical stresses to the rubber tire casing, cold air is supplied to the device chamber 1 through a flange 8. The air temperature is minus 80-85 ° C. The air cools (freezes) the rubber casing of the tire 7 to a brittle temperature of about minus 64-70 ° C. The spent air is discharged from the chamber 1 through a duct 9. Upon completion of the freezing process, the supply of cold air to the chamber 1 is discontinued and a mixture of air and ozone is supplied to the chamber 1 by the manifolds 6. The spent mixture is diverted from the chamber 1 through the nozzle 10. The nozzle nozzles on the manifolds 6 are arranged so that ozone is uniformly distributed on both the outer and inner surfaces of the tires. Ozone in contact with rubber actively oxidises hydrocarbon compounds, especially where the tire is subjected to mechanical stresses created by power train 24 and freezing to brittle temperature. Under these conditions, the oxidation reaction occurs intensively, causing rapid disintegration of the rubber sheath. The rubber sheath breaks into small pieces of 5-10 mm, i.e. rubber crumbs are formed which are separated from the cord. The construction of the bottom 3 is such that the rubber crumbs enter the sieve 15, passing through the grooves of this sieve, and further crumbling into the hopper 13. After dismantling the tire rubber casing, the steel and synthetic cord is dropped from the spacers 38 of the device 24 into the hopper 11.

The rubber casing of the tires 7 is successfully disassembled by proper and reliable operation of the devices 24 which provide uniform mechanical stresses in the casing. Device 24 operates in this manner. To secure the tire 7 and create mechanical stresses therein, the device 24 is locked in such a way that the calipers 27 and telescopic guide rods 37 are disposed along the radial axis of the tire. The axis 28 of the propeller is aligned along the axis 7 of the tire. When the gear 26 is engaged, the shaft 41 of the pivot sleeve 25 causes the screw 28 to rotate. Turning screw 28 clockwise, nut 29 moves screw 28 up and nut 30 moves down. Accordingly, the spreaders 38 and the rods 37 move the spreading saddles 27 in the radial direction. The saddles 27 rest on the tire casing, stretch radially and create mechanical stresses in the casing body. The magnitude of the mechanical stresses is about 0.5 - 0.6 kgf / cm ² . The magnitude of the mechanical stresses is determined by the amount of torque generated by the electric motor 26 of the pivot sleeve 25. When the tire casing 7 has been disassembled, actuator 26 is engaged and rotary sleeve 25 causes the screw 28 to rotate anticlockwise. The nuts 29 and 30 move down and up respectively. This helps to loosen the remaining cord that enters the unit's hopper 11.

The advantages of the device ensure the intended purpose of the invention: to increase the efficiency by effectively separating rubber from steel and synthetic cord, to reduce reagent (ozone) consumption, to accelerate ozone oxidation effect on rubber sheath.

Advantages of the device:

- the device can be used with the combined method of applying mechanical stresses in the tire casing;

- the same device is used to attach the tire before recycling and to create mechanical stresses in the rubber casing;

- Ensure an even supply of reagent over the entire surface of the tire being recycled;

- The mechanical stresses are evenly distributed over the tire area, which ensures rapid rubber breakdown and virtually complete separation of the rubber from the cord.

Claims (8)

1. A tire wrapper consisting of a rectangular body with a cover and a bottom, characterized in that the inner side of the cover is provided with guides on which is mounted a movable platform with force for securing the tires and applying mechanical stresses to them on the cover of the device. rotary sleeve and powertrain actuators were housed and manifolds and nozzles for reagent (ozone) delivery to the tire surface were mounted on the housing walls and cover. 2. A device according to claim 1, characterized in that the inner door cavities are provided with buffer latches. 3. A device according to claim 1, characterized in that a sieve is attached to the wall of the device which is connected to the rubber crumb receiving hopper. 4. Device according to claim 1, characterized in that the power units of the platform are provided with latches which ensure the alignment of the propellers of the power units and the axles of the rotating couplings. 5. A device according to claims 1 and 4, characterized in that the propeller of the power unit has helical threads, with one part of the propeller having right-hand threads and the other having left-hand threads. 6. A device according to claims 1 and 4, characterized in that the force device has loading saddles connected by telescopic guide rods to the propeller nozzle. 7. The device of claim 5, wherein the force device is provided with nuts that move relative to the propeller. 8. Apparatus according to claim 5, wherein each of the platform force means comprises a pusher.