Method for preparing rubber plate by recycling waste tires

Abstract

The invention relates to a method for preparing a rubber plate by recycling waste tires, which belongs to the field of tire recycling and comprises the following steps: S1, fixing tires, and polishing the inner and outer surfaces of the tires; s2, the tire is cut, cutting is conducted once in the radial direction of the tire, so that the tire is provided with a cutting opening, and the tire is unfolded at the cutting opening; s3, heating the tire to soften and thicken the tire to a high-elastic state; s4, at least two tires in the high-elastic state are stacked, a plurality of steel bars are placed on the interface between the tires, all the steel bars are arranged in the length direction of the unfolded tires, the at least two tires in the high-elastic state are extruded to form a rubber plate, and meanwhile the steel bars are pressed into the tires; and S5, the rubber plate is cooled, the whole recovery treatment process is free of chemical reactions such as thermal cracking, recovery treatment operation is achieved according to the physical reaction of the tire, and the whole recovery treatment process does not involve a chemical reaction process, so that the recovery treatment complexity is reduced, and the recovery cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of tire treatment, and particularly to a method for recycling waste tires to prepare rubber plates. Background Art

[0002] With the improvement of people's living standards and the development of the logistics industry, the ownership of private cars and the number of trucks in China have been increasing year by year. The increase in the number of vehicles has driven economic development, and at the same time, the consumption and wear of automobile tires have also generated a lot of waste tires. Most waste tires are thrown away as garbage, which greatly pollutes the environment. Therefore, it is extremely necessary to recycle and process tires to reduce environmental pollution. A Chinese patent discloses a treatment method for recycling waste tires (publication number: CN115612518B), which realizes the recycling of waste tires by treating raw materials. The obtained solid decomposition product, pyrolytic carbon, has the characteristics of large voids, light weight, less ash content, and high calorific value, and can be used as both an adsorbent and a fuel. Although the above patent technology realizes the recycling of waste tires, the entire recycling process is carried out through a pyrolysis reaction of the tires themselves. This chemical reaction method of recycling greatly increases the cost and complexity of the recycling process. Summary of the Invention

[0003] The existing patent technology for recycling waste tires mainly conducts the recycling through a chemical reaction such as pyrolysis. This method has a high cost of recycling and a relatively complex processing process. The present application has developed a method for recycling waste tires to prepare rubber plates, which does not require a chemical reaction process such as pyrolysis of the tires, and can realize the recycling and reuse of waste tires through physical changes of the tires. The specific technical solution is as follows:

[0004] A method for recycling waste tires to prepare rubber plates, comprising the following steps:

[0005] S1. Fix the tire and polish the inner and outer surfaces of the tire;

[0006] S2. Cut the tire, make a single cut along the radial direction of the tire so that the tire has a cut, and unfold the tire at the cut;

[0007] S3. Heat the tire to make it soften, become viscous and reach a highly elastic state;

[0008] S4. Stack at least two tires in a highly elastic state, and place a number of steel bars at the interface between the tires. Each steel bar is arranged along the length direction of the unfolded tire, and squeeze at least two tires in a highly elastic state so that at least two tires are pressed together to form a rubber plate, and at the same time, the steel bars are pressed into the tires;

[0009] S5. Cool the rubber plate.

[0010] As a further solution of the present invention, the rubber used for the tire in step 3 is styrene-butadiene rubber, and its heating temperature is between 80°C and 100°C.

[0011] As a further solution of the present invention, the extrusion pressure of the tire in step 4 is between 18 - 28 MPa, and the extrusion degree is such that the tread blocks of the tire become flat.

[0012] As a further solution of the present invention, when at least two tires are pressed together, the surfaces of the tires with tread blocks abut against each other, and the smooth surfaces of the tires abut against each other.

[0013] As a further solution of the present invention, at least two pressed tires have the same diameter.

[0014] As a further solution of the present invention, the steel bar is provided with a plurality of fixing teeth along its length direction, the fixing teeth are perpendicular to the steel bar, the sum of the diameter of the steel bar and the length of the fixing teeth is less than the thickness of the tire, and each fixing tooth is provided with barbs.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The present invention realizes the recycling and reuse of waste tires by grinding the tires, cutting the tires, heating the tires, and pressing multiple tires to form rubber plates. The entire recycling process does not involve chemical reactions such as pyrolysis. The recycling operation is achieved based on the physical reactions of the tires. Since the entire recycling process does not involve chemical reaction processes, the complexity of the recycling process is reduced, and the recycling cost is reduced. The rubber plates after recycling can be used in various fields, such as roof waterproofing and sound insulation in the construction field; buffer pads or railway sleepers in the transportation field; anti-slip floor plates in the industrial field, etc. Specific Embodiments

[0017] In an embodiment of the present invention, a method for recycling waste tires to prepare rubber plates comprises the following steps:

[0018] A method for recycling waste tires to prepare rubber plates comprises the following steps:

[0019] S1. Fix the tire, and use an existing grinding device to grind the inner surface and the outer surface of the tire, which can remove the unevenness and impurities of the damaged parts of the waste tire, as well as remove the impurities and foreign matters attached to the surface, and improve the smoothness of the tire.

[0020] S2. Cut the tire, make a single cut along the radial direction of the tire, so that the tire has a cut, and unfold the tire at the cut.

[0021] S3. Therefore, heat the tire to make it soften, become viscous and reach the highly elastic state. Since the formulations and compositions of tires of different brands and for different purposes are different, the temperatures required to heat them to the highly elastic state are also different. Therefore, before heating the tire, a tire can be selected first for a heating test to obtain the heating temperature required for different tires. Finally, each different tire only needs to be heated to the corresponding temperature.

[0022] S4. Stack at least two tires in the highly elastic state, and place several steel bars at the interface between the tires. The steel bars are reasonably set according to the width of the tire, and each steel bar is arranged along the length direction of the unfolded tire. Extrude at least two tires in the highly elastic state so that at least two tires are pressed together to form a rubber plate, and at the same time, the steel bars are pressed into the tires.

[0023] S5. Cool the rubber plate.

[0024] Preferably, the rubber used for the tire in step 3 is styrene-butadiene rubber, and its heating temperature is between 80°C and 100°C.

[0025] Preferably, the rubber used for the tire in step 4 is styrene-butadiene rubber, and its extrusion pressure is between 18 - 28 MPa, which can thus cause significant irreversible deformation, squeeze the tread blocks of the tire flat, and at the same time press at least two tires together to form a rubber plate.

[0026] Preferably, when pressing the above at least two tires together, the diameters of the at least two tires to be pressed are the same, which can basically ensure that the edges are neat (allowing a small range of non-uniformity, which can be processed and modified later), and ensure the connection effect with the steel bars.

[0027] Preferably, in order to improve the connection firmness between the steel bars and the tires and the pressing effect between the tires, the steel bars are provided with a plurality of fixing teeth along their length directions. The fixing teeth are perpendicular to the steel bars, and the sum of the diameter of the steel bars and the length of the fixing teeth is less than the thickness of the tire, ensuring that the steel bars and the fixing teeth do not penetrate the tire while connecting the tires, and each fixing tooth is provided with barbs.

[0028] The above specific embodiments cannot be used as a limitation to the protection scope of the present invention. For those skilled in the art of this technology, any alternative improvement or transformation made to the embodiments of the present invention falls within the protection scope of the present invention.

[0029] Those parts not detailed in the present invention are all well-known technologies to those skilled in the art of this technology.

Claims

1. A method for recycling waste tires to prepare rubber sheets, characterized in that, It includes the following steps: S1. Fix the tire and polish the inner and outer surfaces of the tire; S2. Cut the tire, cut it once along the radial direction of the tire so that the tire has a cut, and unfold the tire at the cut; S3. Heat the tire to make it soften, become viscous and reach the high elastic state; S4. Stack at least two tires in the high elastic state, and place several steel bars at the interface between the tires. Each of the steel bars is arranged along the length direction of the unfolded tire, and squeeze at least two tires in the high elastic state so that at least two tires are pressed together to form a rubber plate, and at the same time the steel bars are pressed into the tires; S5. Cool the rubber plate.

2. The method for recycling waste tires to prepare rubber sheets according to claim 1, characterized in that, The rubber used for the tire in step 3 is styrene-butadiene rubber, and its heating temperature is between 80°C and 100°C.

3. A method for recycling waste tires to prepare rubber sheets according to claim 2, characterized in that, In step 4, the extrusion pressure of the tire is between 18 - 28 MPa, and the extrusion degree is until the tread blocks of the tire become flat.

4. A method for recycling waste tires to prepare rubber sheets according to claim 1 or 3, characterized in that, When at least two tires are pressed together, the surfaces of the tires with tread blocks abut against each other, and the smooth surfaces of the tires abut against each other.

5. A method for recycling waste tires to prepare rubber sheets according to claim 1, characterized in that, At least two pressed tires have the same diameter.

6. A method for recycling waste tires to prepare rubber sheets according to claim 1, characterized in that, The steel bar is provided with a plurality of fixing teeth along its length direction. The fixing teeth are perpendicular to the steel bar, and the sum of the diameter of the steel bar and the length of the fixing teeth is less than the thickness of the tire. Each of the fixing teeth is provided with barbs.