CN113352506B

CN113352506B - Method for producing rubber powder by using waste tires, rubber powder and regenerated product thereof

Info

Publication number: CN113352506B
Application number: CN202110689310.9A
Authority: CN
Inventors: 姚宇航
Original assignee: Shaoyang Heibaochi Regeneration Resource Co ltd
Current assignee: Shaoyang Heibaochi Regeneration Resource Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-02-18
Anticipated expiration: 2041-06-22
Also published as: CN113352506A

Abstract

The invention provides a method for producing rubber powder by using waste tires, the rubber powder and a regenerated product thereof, wherein the method comprises the following steps: detecting the waste degree of the waste tires, and grading the waste tires according to the detected waste degree; according to the classification of the waste tires, layering the waste tires according to a preset quality evaluation method; cutting according to the layering of the waste tires to obtain cutting materials with different grades; and crushing and grinding the cutting materials of different grades according to a preset process respectively to obtain rubber powder of different specifications. The method can detect the waste degree of the waste tires, then evaluate the quality of the classified waste tires, stratify the waste tires, cut the waste tires according to the stratification to obtain cutting materials of different grades, and produce rubber powder of different specifications by using the cutting materials of different grades, so that the times of crushing and screening processes can be reduced, and the cost for producing the rubber powder can be reduced.

Description

Method for producing rubber powder by using waste tires, rubber powder and regenerated product thereof

Technical Field

The invention relates to the field of resource regeneration, in particular to a method for producing rubber powder by using waste tires, the rubber powder and a regenerated product thereof.

Background

The rubber powder is mixed in the rubber product, so that the tensile property, tear strength, fatigue resistance, aging resistance and anti-cracking rubber consumption of the product can be improved, and the rubber material cost is greatly reduced. The filling material can improve the physical and mechanical properties of the product, ensure the internal and external quality of the product and reduce the cost of the sizing material, thereby achieving the win-win cost performance. In the production process of the rubber powder, waste tires are mainly used as raw materials and are prepared by cutting, cleaning, drying, coarse crushing, fine crushing and screening. However, in the production process, because the used degree of the waste tires is different and the quality of the rubber contained in the waste tires is also different, not all the tire blocks can easily produce the rubber powder with higher specification, the tire blocks with low quality need to be finely crushed for many times and then screened to obtain the rubber powder with higher specification, the tire blocks with different quality are simultaneously processed, and the screening is needed once every fine crushing, so the cost for producing the rubber powder is increased.

Disclosure of Invention

The embodiment of the invention provides a method for producing rubber powder by using waste tires, which can detect the waste degree of the waste tires, evaluate the quality of the classified waste tires, stratify the waste tires, cut the waste tires according to the stratification to obtain different grades of cutting materials, produce rubber powder with different specifications by using the different grades of cutting materials, reduce the times of crushing and screening processes and reduce the cost for producing the rubber powder.

In a first aspect, an embodiment of the present invention provides a method for producing rubber powder by using waste tires, where the method includes the following steps:

detecting the waste degree of the waste tires, and grading the waste tires according to the detected waste degree;

according to the classification of the waste tires, layering the waste tires according to a preset quality evaluation method;

cutting according to the layering of the waste tires to obtain cutting materials with different grades;

and crushing and grinding the cutting materials of different grades according to a preset process respectively to obtain rubber powder of different specifications.

Optionally, the step of detecting the extent of the junked tires and classifying the junked tires according to the detected extent of the junked tires includes:

acquiring an appearance image and an internal image of the waste tire, wherein the appearance image and the internal image have the same size and resolution;

aligning the appearance image and the internal image, and fusing to obtain a fused image of the waste tire;

inputting the fused image into a pre-trained detection model to detect the waste tire, wherein the detection model takes the waste degree value of the waste tire as output;

and grading the waste tires according to the waste degree value.

Optionally, the step of aligning and fusing the exterior image and the interior image to obtain a fused image of the junked tire includes:

and aligning the channels of the external images and the internal images, and fusing the channels to obtain a fused image of the waste tire.

Optionally, the internal image is a slice image of a laser hologram of the junked tire, and each slice image is used as a channel of the internal image.

Optionally, the step of layering the junked tires according to a preset quality evaluation method according to the grades of the junked tires includes:

matching a corresponding interference fringe evaluation method according to the grading of the waste tires;

and performing interference fringe evaluation on the waste tires by the matched interference fringe method, and layering the waste tires based on evaluation results of the interference fringe evaluation.

Optionally, the evaluation result includes an estimation of rubber density distribution of the junked tires, and the step of layering the junked tires based on the evaluation result of the interference fringe evaluation includes:

layering the scrap tires based on the rubber density distribution estimate.

Optionally, the preset process is designed according to the specification of the rubber powder and the grade of the cutting material.

Optionally, before the step of crushing and grinding the cut materials of different grades according to a preset process, the method further includes:

and carrying out cold treatment on the cutting materials of different grades.

In a second aspect, the embodiment of the invention also provides rubber powder, which is produced by the method for producing rubber powder by using waste tires as described in any one of the embodiments of the invention.

In a third aspect, the embodiment of the invention also provides a reclaimed product of rubber powder, which is obtained by adding the rubber powder in the embodiment of the invention in the production process.

In the embodiment of the invention, the waste degree of the waste tires is detected, and the waste tires are classified according to the detected waste degree; according to the classification of the waste tires, layering the waste tires according to a preset quality evaluation method; cutting according to the layering of the waste tires to obtain cutting materials with different grades; and crushing and grinding the cutting materials of different grades according to a preset process respectively to obtain rubber powder of different specifications. The method can detect the waste degree of the waste tires, then evaluate the quality of the classified waste tires, stratify the waste tires, cut the waste tires according to the stratification to obtain cutting materials of different grades, and produce rubber powder of different specifications by using the cutting materials of different grades, so that the times of crushing and screening processes can be reduced, and the cost for producing the rubber powder can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flow chart of a method for producing rubber powder by using waste tires according to an embodiment of the invention;

fig. 2 is a flowchart illustrating a method for detecting a worn degree of a worn tire according to an embodiment of the present invention;

fig. 3 is an image processing apparatus according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a method for producing rubber powder by using waste tires, which can detect the waste degree of the waste tires, evaluate the quality of the classified waste tires, stratify the waste tires, cut the waste tires according to the stratification to obtain different grades of cutting materials, produce the rubber powder with different specifications by using the different grades of cutting materials, reduce the times of the crushing process and the screening process and reduce the cost for producing the rubber powder.

Referring to fig. 1, fig. 1 is a flow chart of a method for producing rubber powder by using waste tires according to an embodiment of the present invention, as shown in fig. 1, including the following steps:

and S1, detecting the waste degree of the waste tires, and grading the waste tires according to the detected waste degree.

In the embodiment of the invention, the waste tire can be an automobile tire and a non-automobile tire, and the waste tire comprises rubber, steel wires and cord fabrics. Further, a tire is composed of three large components, a tread, a carcass and beads. The tread is the contact part of the outer tire and the ground, is a rubber layer covered on the tire body and is used for transmitting the traction force and the braking force of a vehicle and protecting the tire body. Furthermore, the tire surface is divided into a crown part, a tire shoulder part and a tire side part according to positions. The tire crown is a driving surface of the tire, bears impact and abrasion, generates gripping force and protects the cord fabric layer from being damaged. The tire shoulders are transition parts of the tire crown and the tire side and play a certain supporting role for the tire tread. The side walls are glue layers attached to two sides of the carcass ply. The carcass side plies are protected from mechanical damage and atmospheric attack. Because the tread, the tire shoulder and the tire side have different functions, different rubber materials are mostly adopted for preparation.

The carcass is composed of a cushion layer and a cord fabric layer. Wherein, the buffer layer is positioned between the tire tread and the tire body cord fabric layer and is made of rubberized cord fabric or rubber sheets. Because the tire is subjected to the highest stress and the highest concentration at the part and the highest temperature during the running process, the tire is easy to delaminate and damage, and therefore the buffer layer has higher strength, elasticity and better adhesion performance and absorbs and buffers external impact and vibration. The buffer layer can be made of nylon cord, rayon cord or steel cord. The cushion layer in some tires is also known as a belt or hoop layer. The carcass ply is a carcass ply, which provides the tire with the necessary elasticity and strength, and which is resistant to tire loads and repeated deformations during driving, and to strong vibrations and impacts due to road surface irregularities. Further, the ply layer generally comprises an outer ply layer and an inner ply layer, and the outer ply layer can comprise a rubber-coated ply layer and a release liner (sometimes the release liner is not used). The inner ply can be composed of rubberized ply and oil skin glue. The cord fabric layer increases the strength of the tyre body and can fix the outer edge dimension of the tyre.

The tire bead is a part for tightly fixing the outer tire of the tire and the rim, has high strength and rigidity, bears the interaction force between the tire and the rim, and prevents the outer tire of the tire from falling off in the running process of a vehicle. The tire bead comprises three important parts, namely a cord fabric layer, a steel ring and a chafer. The steel ring is a main body and consists of a steel wire ring, a triangular rubber strip (also called a filling rubber strip) and steel ring wrapping cloth. The steel wire ring is formed by winding a plurality of rubber-coated steel wires, and a triangular rubber strip made of semi-hard rubber is additionally attached to the periphery of the steel wire ring to play a role in filling gaps, or two rubber materials with different hardness can be compounded to form the steel wire ring. The steel ring wrapping cloth wraps the steel wire ring and the triangular rubber strip into a whole steel ring. The tire bead filler is also called as bead filler, is positioned outside the tire bead, protects the tire cord fabric layer, is in direct contact with the rim, and has better wear resistance.

Because the junked tire can have the condition that tread wear, matrix and tire bead compression warp in long-term use for each structure of tire all takes place the change of different degrees, receives junked tire's junked degree influence, adopts unified rubber powder production technology to the junked tire of different junked degrees, and the ratio of input cost and output value is higher, is unfavorable for cost reduction.

In the embodiment of the present invention, the detecting the extent of waste may be performed by using an image detection technique, optionally, referring to fig. 2, fig. 2 is a flowchart for detecting the extent of waste of a waste tire according to the embodiment of the present invention, as shown in fig. 2, including the following steps:

and S11, acquiring an appearance image and an internal image of the waste tire, wherein the appearance image and the internal image have the same size and resolution.

In an embodiment of the present invention, the external image of the waste tire may be a three-dimensional scanned image of the waste tire, the external image records external information of the waste tire, the external information is a spatial coordinate of the surface of the waste tire obtained by scanning spatial external information and color information of the waste tire, the internal image may be a laser hologram of the waste tire, and the laser hologram records internal information of the waste tire. According to the embodiment of the invention, the waste degree of the waste tire is detected through the appearance image and the internal image of the waste tire.

The dimensions referred to above refer to the height, width and depth of the image, and the resolution referred to above refers to the resolution of the image in units of dimensions, i.e., the number of pixels contained in each unit of height and width, which may be inches or centimeters. Further, the appearance image and the internal image have the same size and resolution, which means that the size and resolution of the waste tire in the appearance image are the same as the size and resolution of the waste tire in the internal image. Further, the junked tires in the exterior image and the junked tires in the interior image are also the same in the photographed posture.

And S12, aligning the appearance image and the internal image, and fusing to obtain a fused image of the waste tire.

In the embodiment of the present invention, the alignment of the exterior image and the interior image refers to the alignment of the junked tire portion in the exterior image and the junked tire portion in the interior image, specifically, the alignment may be performed by extracting a first surface key point of the junked tire in the exterior image and a second surface key point of the junked tire in the interior image and performing Scale Invariant Feature Transform (SIFT). The tolerance to light, noise, and slight viewing angle changes is also quite high. Therefore, the alignment of the appearance image and the internal image has a good effect. Furthermore, a PCA-SIFT algorithm can be adopted for alignment, and the number of SIFT key points can be subjected to dimension reduction and then alignment, so that the alignment speed is increased.

In a possible embodiment, the fusion refers to fusion of channel dimensions, the appearance image is used as one channel, the internal image is used as one channel, and fusion is performed on the channel dimensions to obtain a fused image with more channels.

In a possible embodiment, the internal image is a slice of a laser hologram of a used tyre, each slice serving as a channel of the internal image. Alternatively, the appearance image may be a slice of a three-dimensional scanned image, each slice serving as a channel of the appearance image. The number of slices of the internal image and the number of slices of the external image may be the same or different, and the larger the number of slices, the more accurate the detection result is, and the number of slices of the internal image and the number of slices of the external image are not limited in the embodiment of the present invention.

And S13, inputting the fused image into a pre-trained detection model to detect the waste tire, wherein the detection model takes the waste degree value of the waste tire as output.

In the embodiment of the present invention, the detection model may be a convolutional neural network model, and parameters in the detection model are obtained through training. The convolutional neural network model comprises an input layer, an intermediate convolutional layer and an output layer, wherein the input layer can be used for inputting a fusion image, the intermediate convolutional layer can be used for calculating an intermediate result and performing information fitting on appearance information of the appearance image and internal information of the internal image, the output layer is used for outputting waste degree values, it needs to be noted that the output layer comprises linear output units with the same quantity as the waste degree, for example, when the waste degree comprises 5 types, the corresponding waste degree values are 1, 2, 3, 4 and 5, and the quantity of the linear output units is 5.

The detection model can be trained through supervised learning, a data set for training is prepared, the data set comprises sample images and corresponding sample labels, each group of sample images corresponds to one sample label, each group of sample images comprises an external image and an internal image of a waste tire, the sample labels are corresponding sample waste degree values, and the sample waste degree values corresponding to the sample images are obtained by labeling experts. The training process comprises forward calculation and backward propagation, in the training process, a sample image is input into a detection model and calculated with parameters in the detection model, a forward waste degree value is obtained through output, the forward waste degree value and the sample waste degree value corresponding to the sample image are subjected to loss calculation, an error between the forward waste degree value and the sample waste degree value is calculated, then backward propagation is carried out, the parameters of the detection model are adjusted by adopting a gradient reduction method, and forward calculation and backward propagation are continuously iterated until the error is smaller than a preset value.

In the embodiment of the invention, the convolutional neural network model is used as a detection model, so that the appearance information of the appearance image and the internal information of the internal image of the waste tire can be fully fitted, and the detection is more accurate.

And S14, classifying the waste tires according to the waste degree value.

In the embodiment of the present invention, each junked extent value corresponds to a junked tire classification, for example, the junked tires are classified according to junked extent and can be classified into 1 level, 2 level, 3 level, 4 level, and 5 level, the junked extent increases from small to large according to the classification, specifically, the junked extent of the 1 level is the lowest, the junked extent of the 2 level is higher than that of the 1 level, the junked extent of the 3 level is higher than that of the 2 level, the junked extent of the 4 level is higher than that of the 3 level, and the junked extent of the 5 level is the highest. Correspondingly, the waste degree values corresponding to the 1-level, the 2-level, the 3-level, the 4-level and the 5-level are respectively 1, 2, 3, 4 and 5.

In one possible embodiment, the grading of the used tires can be determined taking into account the surface wear of the tread, the internal deformation of the carcass and the beads, which can be assessed by experts on the basis of the surface wear and the internal deformation of the carcass and the beads.

And S2, layering the waste tires according to the classification of the waste tires and a preset quality evaluation method.

In the embodiment of the invention, because the waste tires with different grades have different waste degrees, in order to further improve the ratio of the rubber powder output to the process input of the waste tires, the quality of each different group of waste tires can be evaluated, and the optimal layering scheme can be calculated.

In the embodiment of the invention, the quality evaluation method mainly utilizes the density distribution of rubber caused by deformation in the waste tires for evaluation. Specifically, the rubber density distribution can be analyzed by laser holograms of junked tires.

Optionally, in an embodiment of the present invention, the laser hologram includes interference fringes, and a corresponding interference fringe evaluation method may be matched according to the classification of the waste tire; and performing interference fringe evaluation on the waste tire by the matched interference fringe method, and layering the waste tire based on the evaluation result of the interference fringe evaluation. According to different grades of the waste tires, corresponding interference fringe evaluation is set, and the quality evaluation of the waste tires can be performed in a more targeted manner. Alternatively, the interference fringe evaluation method may be performed by visually recognizing the laser hologram by an experienced operator, or may be performed automatically by an interference fringe evaluation model based on a convolutional neural network.

The interference fringe evaluation model based on the convolutional neural network is trained in advance, specifically, the interference fringe evaluation model based on the convolutional neural network is trained according to different grades of the waste tires, for example, the waste tires are graded according to the waste degree and can be divided into 1 grade, 2 grade, 3 grade, 4 grade and 5 grade, the waste degree is increased from small to large according to the grades, and at least one interference fringe evaluation model based on the convolutional neural network is trained corresponding to each grade of the waste tires.

In the training process of the interference fringe evaluation model based on the convolutional neural network, a data set for training is established in each stage, an image sample in the data set is a laser hologram of a waste tire, a sample label is a rubber density distribution diagram, and image segmentation and labeling are equivalently carried out on the density distribution in the laser hologram. The interference fringe evaluation model based on the convolutional neural network comprises an input layer, a middle convolutional layer and an output layer, wherein the input layer is used for inputting a laser hologram of a waste tire, the middle convolutional layer is used for calculating input and parameters, fitting distribution information of each interference fringe, abstracting rubber density distribution information inside the waste tire to obtain a rubber density distribution area as a high-grade feature, the output layer comprises an upper sampling layer, and the high-grade feature obtained by calculating the middle convolutional layer is regressed to the laser hologram to obtain a rubber density distribution graph as rubber density distribution estimation. And layering the waste tires based on the rubber density distribution estimation.

And S3, cutting according to the layering of the waste tires to obtain cut materials of different grades.

In the embodiment of the invention, the waste tires are layered to obtain the layering with the rubber density distribution close to that of the waste tires, and then the waste tires are cut to obtain the cutting materials with different grades, and the cutting materials with different grades can be used for producing rubber powder with different specifications in a targeted manner. Further, the layering includes a layering depth and a layering width, and corresponds to the cutting material, the layering depth is the thickness of the cutting material, and the layering width is the width of the cutting material.

And S4, crushing and grinding the cutting materials of different grades according to a preset process respectively to obtain rubber powder of different specifications.

In the embodiment of the invention, because the cutting materials have different grades and correspond to different rubber density distributions, when high-quality rubber powder is produced, for example, 200-mesh rubber powder, if the cutting material with smaller rubber density distribution is adopted, in the crushing process, because the rubber density distribution is smaller, the surface area is larger and irregular, the crushing difficulty is increased, after multiple crushing is needed, particles with similar quality are obtained and then ground, and the 200-mesh rubber powder is obtained, and the cost is higher when the cutting material with smaller rubber density distribution is used in consideration of the input-output ratio of the 200-mesh rubber powder, so that the method is uneconomical. And if the cutting material with larger rubber density distribution is adopted, in the crushing process, the rubber density distribution is larger, so that the surface area is smaller and more regular, the required crushing times are less, and the grinding can be directly carried out.

In the embodiment of the invention, the grade of the cutting material can be divided into 20-60 mesh grade, 60-120 mesh grade and 120-200 mesh grade. The 20-60-mesh grade cutting material is used for producing rubber powder with the specification of 20-60 meshes, the 60-120-mesh grade cutting material is used for producing rubber powder with the specification of 60-120 meshes, and the 120-200-mesh grade cutting material is used for producing rubber powder with the specification of 120-200 meshes. The cutting materials of different grades are respectively crushed and ground according to a preset process, and specifically, the process flow of the cutting materials of 20-60 meshes comprises the following steps: cutting, cleaning, drying, coarse crushing, fine crushing, air separation and magnetic separation. The process flow of the 60-120 mesh grade cutting material comprises the following steps: cutting into blocks, carrying out primary coarse crushing, cleaning, drying, carrying out secondary coarse crushing, finely crushing, winnowing and magnetically separating. The process flow of the 120-200 mesh grade cutting material comprises the following steps: the method comprises the following steps of taking cord fabric and steel wires, cutting into blocks, carrying out primary coarse crushing, cleaning, drying, carrying out secondary coarse crushing, carrying out primary fine crushing, carrying out air separation, carrying out magnetic separation, carrying out secondary fine crushing, carrying out magnetic separation and carrying out optical separation.

In a possible embodiment, before the step of crushing and grinding the different grades of cut materials according to a preset process, the method may further include: and (5) performing cold treatment on the cutting materials of different grades.

Alternatively, in the embodiment of the present invention, the steps S1 and S2 may be executed by an image processing device, specifically, for example, a computer, a server, an image device, or a smartphone capable of performing image processing.

Referring to fig. 3, fig. 3 is an image processing apparatus according to an embodiment of the present invention, and as shown in fig. 3, the image processing apparatus includes:

the classification module 301 is used for detecting the waste degree of the waste tires and classifying the waste tires according to the detected waste degree;

a layering module 302, configured to layer the junked tires according to a preset quality evaluation method according to the grades of the junked tires.

Optionally, the ranking module 301 includes:

the waste tire management system comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is used for acquiring an appearance image and an internal image of the waste tire, and the appearance image and the internal image have the same size and resolution;

the alignment unit is used for aligning the appearance image and the internal image and fusing the appearance image and the internal image to obtain a fused image of the waste tire;

the detection unit is used for inputting the fusion image into a pre-trained detection model to detect the waste tire, and the detection model takes the waste degree value of the waste tire as output;

and the grading unit is used for grading the waste tires according to the waste degree values.

Optionally, the alignment unit is further configured to align channels of the exterior image and the interior image, and perform channel fusion to obtain a fusion image of the junked tire.

Optionally, the layering module 302 includes:

the matching unit is used for matching a corresponding interference fringe evaluation method according to the grading of the waste tires;

and the layering unit is used for evaluating the interference fringes of the waste tires by the matched interference fringe method and layering the waste tires based on the evaluation result of the interference fringe evaluation.

Optionally, the evaluation result includes an estimation of rubber density distribution of the junked tires, and the layering unit is further configured to layer the junked tires based on the estimation of rubber density distribution.

Optionally, in an embodiment of the present invention, the steps S1 to S4 may be completed by an automatic processing system, where the automatic processing system includes an image processing device, an automatic cutting device, and a crushing production line, where the image processing device is the image processing device in the embodiment of fig. 3, the automatic cutting device receives a layering instruction of the image processing device, the layering instruction includes a layering parameter, and the automatic cutting device cuts the waste tire according to the parameter in the layering instruction, and sends the obtained cut materials of different levels to corresponding crushing production lines to be crushed, ground, and screened, so as to obtain corresponding rubber powder.

Optionally, the embodiment of the invention also provides rubber powder, and the rubber powder is produced by any method for producing rubber powder by using waste tires in the embodiment of the invention.

Optionally, the embodiment of the invention also provides a reclaimed product of rubber powder, wherein the reclaimed product is obtained by adding the rubber powder in the embodiment of the invention in the production process.

The method can detect the waste degree of the waste tires in the rubber powder production process, then perform quality evaluation on the classified waste tires, stratify the waste tires, cut the waste tires according to the stratification to obtain different grades of cutting materials, and produce the rubber powder with different specifications by using the different grades of cutting materials, so that the times of the crushing process and the times of the screening process can be reduced, and the cost for producing the rubber powder can be reduced.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.

Claims

1. A method for producing rubber powder by using waste tires is characterized by comprising the following steps:

acquiring an appearance image and an internal image of the waste tire, wherein the appearance image and the internal image have the same size and resolution, the internal image is a slice image of a laser hologram of the waste tire, and each slice image is used as a channel of the internal image;

extracting a first surface key point of a waste tire in an appearance image and a second surface key point of the waste tire in an internal image, aligning channels of the appearance image and the internal image through Scale Invariant Feature Transform (SIFT), and performing channel fusion to obtain a fusion image of the waste tire;

classifying the waste tires according to the waste degree values;

performing interference fringe evaluation on the waste tires by the matched interference fringe evaluation method, and layering the waste tires based on evaluation results of the interference fringe evaluation;

2. The method for producing rubber powder from scrap tires according to claim 1, wherein the evaluation result includes an estimation of the rubber density distribution of the scrap tires, and the step of layering the scrap tires based on the evaluation result of the interference fringe evaluation includes:

layering the scrap tires based on the rubber density distribution estimate.

3. The method for producing rubber powder from waste tires according to claim 2, wherein the predetermined process is designed according to the specifications of the rubber powder and the grade of the cut material.

4. The method for producing rubber powder from waste tires according to claim 2, wherein before the step of crushing and grinding the different grades of cutting materials according to a preset process, the method further comprises the following steps:

and carrying out cold treatment on the cutting materials of different grades.

5. A rubber powder, characterized in that the rubber powder is produced by the method for producing rubber powder by using waste tires as claimed in any one of claims 1 to 4.

6. A reclaimed product of rubber powder, characterized in that it is obtained by adding the rubber powder according to claim 5 during production.