CN209851385U - Sawtooth-shaped double-roller drum-type rubber powder grinding machine - Google Patents

Abstract

The utility model discloses a two roller drum-type rubber milling machines of zigzag belongs to the rubber and smashes technology field. The utility model discloses a roller-type rubber milling machine of zigzag two rollers, include the pedestal, through bearing and its bearing frame rotary type fix on the pedestal, and be the big roller and the small roller that rotate in opposite directions of the state of being parallel to each other, can be the frame-shaped structure on the pedestal, both sides are the fixed wall of the fixed two rollers of vertical type, are fixed with the bearing frame in the wall, two rollers pass the bearing through its centre shaft and fix at two fixed wall inboards; convex sawteeth and concave sawteeth which are in an axial parallel state are arranged on the roll surfaces of the large roll and the small roll in a staggered mode, and are respectively a convex sawtooth I, a concave sawtooth I, a convex sawtooth II and a concave sawtooth II; the convex and concave sawteeth form an oblique included angle theta with the central line of the double roller. The utility model discloses can reduce the thermal production of crushing in-process at the cutting process, guarantee that the temperature of production can cool off fast, avoid the overheated desulfurization state that appears of partial rubber powder, take place oxidative degradation even, play unexpected technological effect.

Description

Sawtooth-shaped double-roller drum-type rubber powder grinding machine

Technical Field

The utility model relates to a rubber crushing process field, more specifically say so and relate to a two roller drum-type rubber milling machines of zigzag.

Background

At present, a rubber pulverizer is divided into two major types, namely a double-roller pulverizer and a millstone pulverizer, wherein the double-roller pulverizer is mainly used for pulverizing rubber materials of rubber products such as rubber, tires and the like, a front roller is a polished arc groove surface, a rear roller is a polished sawtooth groove surface, the two rollers are made of chilled cast iron, the surfaces of the rollers are hard and wear-resistant, the insides of the rollers are hollow, cooling water circulation is introduced according to use requirements to adjust the surface temperature of the rollers, the two rollers rotate relatively at different speeds to pull the rubber materials into two roller gaps for mechanical processing, for example, waste rubber pulverizing mechanical equipment utilizes various waste rubbers as raw materials, and the waste rubbers are processed to produce rubber powder by adopting a grinding principle under the action of high pressure for recycling; the basic principle of the millstone type flour mill is that the material is sheared and milled by the relative movement of two millstones, so as to achieve the purpose of crushing the material. The double-water cooling is adopted to effectively control the material crushing temperature, so that the ideal product quality is obtained.

Both a double-roller type pulverizer and a millstone type pulverizer have a problem that the rubber powder obtained after being pulverized by the structure and the working principle of the pulverizer has fluffy strips and even has a partial desulfurization state, which seriously influences the quality of the rubber powder and easily causes the problems of blockage and the like when the subsequent rubber powder is used, such as the feeding of regenerated rubber.

Through retrieval, the Chinese patent publication number: CN107839111A, published: 2018, 3.27.8, a double-roller rubber pulverizer is disclosed, wherein a high-speed roller is installed in a case, a low-speed roller is arranged at the position adjacent to the high-speed roller, a roller gap is reserved between the two rollers, the outer surface of the high-speed roller and the outer surface of the low-speed roller are smooth rollers, the high-speed roller is operated by a high-speed motor and connected with a high-speed reducer through a coupler, the high-speed reducer is connected with the high-speed roller through a coupler, the low-speed roller is operated by a low-speed motor and connected with a low-speed reducer through a coupler, and the low-speed reducer is connected with the low-speed. The technical scheme adopts double rollers, motors are respectively and independently directly connected with a speed reducer, one roller with high rotating speed and the other roller with low rotating speed are respectively and independently and directly connected with the speed reducer by the motors without mutual interference, the two rollers rotate relatively, the fineness of rubber powder produced by the flour mill is 40-120 meshes, and therefore the requirements of high-elasticity rubber materials with different hardness, the product fineness and the production efficiency are met. The outer surface of the high-low rotating speed roller of the flour mill in the scheme is a smooth roller, the contact area of the mode of rubbing and grinding is large, the particle size of the prepared material is large, and the appearance is fluffy.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

To among the prior art rubber milling machine great at rubber milling in-process granularity, the fluffy problem of outward appearance, the utility model provides a two roller drum-type rubber milling machine of zigzag. The utility model discloses the slant setting of protruding, the concave sawtooth of two roller cylinders of rubber milling machine through parallel state will rub the mode of grinding with the hands and change the mode of sawtooth cutting into, and the rubber powder that makes is anomalous granular rubber powder, and the fluffy state of outward appearance changes the sight greatly.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

a roller-type rubber pulverizer with saw-tooth shape and double rollers includes a machine base, a big roller and a small roller which are fixed on the machine base in a rotary mode through a bearing and bearing seats, and rotate oppositely in a parallel state, the machine base can be in a frame structure, two sides of the machine base are vertical fixing walls for fixing the double rollers, the bearing seats are fixed in the walls, and the double rollers pass through the bearing through the middle shafts of the double rollers and are fixed on the inner sides of the two fixing walls; the rotation of the large roller and the small roller is respectively driven by a large roller driving motor and a small roller driving motor which are in end head transmission connection, and the large roller driving motor and the small roller driving motor are fixed on the outer side of the fixed wall; convex sawteeth and concave sawteeth which are in an axial parallel state are arranged on the roll surfaces of the large roll and the small roll in a staggered mode, and are respectively a convex sawtooth I, a concave sawtooth I, a convex sawtooth II and a concave sawtooth II; and an inclined included angle theta is formed between the convex sawteeth and the concave sawteeth and the central line of the double roller.

The combined design of the zigzag structure and the oblique included angle theta on the two rollers of the rubber pulverizer ensures that rubber between the two sawteeth in the operation process of the two rollers is crushed in a cutting mode, and avoids the traditional rubbing mode, so that the obtained rubber powder is mainly granular.

Furthermore, the convex sawteeth and the concave sawteeth are in one-to-one matching corresponding relation of the convex sawteeth I and the convex sawteeth II and the concave sawteeth I and the concave sawteeth II when the double rollers rotate, so that part of rubber powder is prevented from being cut by mistake in the cutting process, and the aim of uniformly cutting the rubber powder is fulfilled; concave sawtooth I and concave sawtooth II form the pressure-equalizing groove when the two rollers rotate and cut the material, play the rubber powder of guaranteeing the sawtooth cutting and spill and reach the steady pressure effect after getting into the pressure-equalizing groove inside through the extrusion, avoid the material local to pile up the pressure too big and cause the powder intensification desulfurization, even oxidative degradation.

Further, the rotating speed ratio of the large roller to the small roller is (1-12): 1, under other conditions, such as certain conditions of roller diameter, oblique included angle theta and the like, the larger the rotation speed ratio is, the larger the heat generated by shearing is, the higher the efficiency of the cutting mode for grinding powder is, and the smaller the reverse rotation speed ratio is, the smaller the heat generated by shearing is, and the lower the efficiency of the cutting mode for grinding powder is; meanwhile, the larger the rotation speed ratio is, the larger the heat generated by shearing is, the larger the energy consumption of cooling loss through cooling water is, and the lower the utilization rate of the energy is; when the rotation speed ratio is lower, the grinding efficiency of the cutting mode is lower, the generation of rubber powder is too low, and even the rubber powder with the required granularity is difficult to generate; therefore, on the premise of ensuring the maximum productivity of the rubber powder with the required granularity, the rotating speed ratio is (1-12): 1, the heat generated by shearing can be controlled to the maximum extent; the front angles alpha of the convex sawteeth I and the convex sawteeth II in the rotating direction are smaller than the rear angles beta, and the effect is that the convex sawteeth I collide with the convex sawteeth II to generate shearing force.

Further, the diameter ratio of the large roller and the small roller is: (1.1-2.2): 1, shearing difference is formed, when the diameter ratio is too large, the service lives of the two rollers are greatly different, the efficiency of combined production is reduced, and when the diameter ratio is too small, tooth grooves are easily meshed to influence the shearing effect; the included angle theta is 5-20 degrees, if the included angle theta is too small, the cutting edge is sharp, the strength is low, and the milling powder is easy to wear in a cutting mode, so that the service life is short; the included angle theta is too large, the cutting edge is wider, the strength is higher, the colloidal particle cutting mode is even difficult to grind the colloidal powder to the required granularity when the colloidal particle is ground by the cutting mode, namely the grinding is difficult, the included angle theta is 5-20 degrees, and the requirements of service life and ground powder granularity can be considered; the oblique direction of convex sawtooth I and convex sawtooth II is unanimous, avoids cuting to deviate from, improves shearing efficiency. The rotating speed ratio and the included angle theta are cooperatively matched to play a combined action effect, and the shearing heat, the shearing efficiency, the shearing granularity and the service life can be taken into consideration

Further, the gap between the large roller and the small roller is 0.01-2 mm, and the corresponding adjustment is carried out according to the requirement of particle size; the widths of the convex sawteeth and the concave sawteeth are consistent, the heights of the convex sawteeth are consistent with the depths of the concave sawteeth, so that a stable pressure equalizing groove is formed, and stable and uniform product granularity is produced.

Furthermore, the gap between the large roller and the small roller is adjusted by a double-roller gap adjusting mechanism, and the double-roller gap adjusting mechanism can adopt the ball screw, the sliding block and the sliding rail structure in the prior art, namely the bearing seat is fixedly connected with the sliding block; the ball screw penetrates through the center of the slider with the threads inside, slide rails are arranged on two sides of the slider, and the ball screw is externally connected with an adjusting motor; big roller driving motor and little roller driving motor are hydraulic motor, and stability is good, and with the pressure-equalizing tank synergism, further improve stable product granularity.

Further, the rotation speed ratio of the large roller to the small roller is 8: and 1, combining the determined double-roll diameter ratio, and controlling the heat generated by shearing to the maximum extent on the premise of ensuring the maximum productivity of the rubber powder.

Furthermore, the inner cavities of the large roller and the small roller are externally connected with circulating cooling water through cooling water connectors, so that heat generated by shearing is taken away in time, and high-temperature desulfurization and even oxidative degradation of materials are avoided.

A cutting and grinding method of a sawtooth-shaped double-roller drum-type rubber pulverizer comprises the following steps:

step one, adjusting a gap: adjusting the gap between the large roller and the small roller according to the requirement of the size of ground rubber;

step two, starting the double rollers: the two rollers are started to rotate oppositely by starting the large roller driving motor and the small roller driving motor;

step three, feeding: the coarse sizing material particles are fed into the gap in a free falling mode through a hopper right above the gap between the large roller and the small roller;

step four, cutting type grinding: under the synergistic action of the convex sawteeth I and the convex sawteeth II, the front angles alpha of the two sawteeth are acute angles, a shearing force is formed when the front angles alpha are close to each other, the coarse sizing material is sheared, and the sheared fine material is extruded into the equalizing groove under the action of extrusion force;

step five, blanking: with the rotation of the double rollers, the fine materials in the pressure equalizing grooves naturally fall into the fine material temporary storage hopper under the vibration effect generated by the rotation of the double rollers.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) the utility model discloses a two roller drum-type rubber flour mills of zigzag, the combined design of zigzag structure and oblique contained angle theta on the two rollers, the mode of rubber between the two sawtooth is cut and is smashed in the assurance two roller operation in-process, and avoid traditional mode of rubbing with the hands and grinding, make the rubber powder that obtains mainly with the graininess, moreover, compare in the mode of rubber powder crushing rubbing with the hands and grinding of prior art, can also reduce the thermal production in the crushing process in the cutting process, guarantee that the temperature that produces can cool off fast, avoid some rubber powder overheated appearance desulfurization state, play unexpected technological effect;

(2) the utility model discloses a zigzag double-roller drum-type rubber pulverizer, the one-to-one matching corresponding relation of convex and concave sawteeth when double rollers rotate is adopted, so as to avoid that part of rubber powder is cut by mistake in the cutting process, thereby achieving the purpose of uniformly cutting the rubber powder;

(3) the utility model discloses a two roller drum-type rubber milling machines of zigzag, concave sawtooth I and concave sawtooth II form the pressure-equalizing groove when cutting the material when two rollers rotate, play and guarantee that the rubber powder of sawtooth cutting leaks and reach the steady pressure effect after getting into the pressure-equalizing groove inside through the extrusion, avoid the material local to pile up the pressure too big and cause the powder to heat up the desulfurization, even oxidative degradation;

(4) the utility model discloses a two roller drum-type rubber milling machine of zigzag, under other conditions, for example roller diameter, the oblique contained angle theta etc. certain prerequisite, the rotational speed ratio is bigger, and the heat that the shearing produced is bigger, and the efficiency of cutting mode crocus is higher, and the phase reversal velocity ratio is smaller, and the heat that the shearing produced is smaller, and the efficiency of cutting mode crocus is lower; meanwhile, the larger the rotation speed ratio is, the larger the heat generated by shearing is, the larger the energy consumption of cooling loss through cooling water is, and the lower the utilization rate of the energy is; when the rotation speed ratio is lower, the grinding efficiency of the cutting mode is lower, the generation of rubber powder is too low, and even the rubber powder with the required granularity is difficult to generate; therefore, on the premise of ensuring the maximum productivity of the rubber powder with the required granularity, the rotating speed ratio is (1-12): 1, the heat generated by shearing can be controlled to the maximum extent; the front angles alpha of the convex sawteeth I and the convex sawteeth II in the rotating direction are smaller than the rear angles beta, and the effect is that the convex sawteeth I and the convex sawteeth II collide to generate shearing force;

(5) the utility model discloses a zigzag double-roller drum-type rubber pulverizer, the included angle theta is too small, the cutting edge is sharper, the intensity is lower, and the service life is shorter because the roller type rubber pulverizer is easy to wear when pulverizing by a cutting mode; the included angle theta is too large, the cutting edge is wider, the strength is higher, the colloidal particle cutting mode is even difficult to grind the colloidal powder to the required granularity when the colloidal particle is ground by the cutting mode, namely the grinding is difficult, the included angle theta is 5-20 degrees, and the requirements of service life and ground powder granularity can be considered; the oblique directions of the convex sawteeth I and the convex sawteeth II are consistent, so that shearing deviation is avoided, and the shearing efficiency is improved;

(6) the utility model discloses a two roller drum-type rubber milling machines of zigzag, the diameter ratio of big roller and small roll is: (1.1-2.2): 1, shearing difference is formed, when the diameter ratio is too large, the service lives of the two rollers are greatly different, the efficiency of combined production is reduced, and when the diameter ratio is too small, tooth grooves are easily meshed to influence the shearing effect; the effect of combination is achieved by matching the rotating speed ratio and the included angle theta, and the shearing heat, the shearing efficiency, the shearing granularity and the service life can be considered;

(7) the utility model relates to a sawtooth-shaped double-roller drum-type rubber grinder, which correspondingly adjusts the clearance between double rollers according to the granularity requirement;

(8) the utility model discloses a zigzag double-roller drum-type rubber pulverizer, the width of convex and concave sawteeth is consistent, the height of the convex sawteeth is consistent with the depth of the concave sawteeth, a stable pressure equalizing groove is formed, and stable and uniform product granularity is produced;

(9) the utility model discloses a two roller drum-type rubber milling machines of zigzag, the rotational speed ratio of big roller and small roll is 8: 1, the optimal rotation speed ratio is combined with the determined double-roller ratio, and the heat generated by shearing is controlled to the maximum extent on the premise of ensuring the maximum capacity of the rubber powder;

(10) the utility model discloses a two roller drum-type rubber milling machines of zigzag, the external recirculated cooling water of inner chamber of big roller and small roller in time takes away the heat that produces of will cuting, avoids the high temperature desulfurization of material, oxidative degradation even.

(11) The utility model discloses a two roller drum-type rubber milling machine crocus method of zigzag, to roll-type cutting sizing material, efficient, the production of heat is few, easy operation, and product granularity adjustable range is big, easy popularization and application.

Drawings

FIG. 1 is a perspective view of the roller-type rubber pulverizer with saw-toothed rollers according to the present invention;

FIG. 2 is a side view of the saw-tooth shaped double-roller drum type rubber pulverizer of the present invention;

FIG. 3 is a top view of the saw-tooth shaped double roller type rubber pulverizer of the present invention;

FIG. 4 is a schematic view of a saw-toothed twin-roll drum according to the present invention;

FIG. 5 is a top view of a serrated twin roll drum of the present invention;

FIG. 6 is an enlarged view of part B of FIG. 4;

fig. 7 is an enlarged view of a portion a of fig. 5.

In the figure: 2. a machine pedestal; 3. a bearing; 4. a cooling water interface; 6. a small roller drive motor; 7. a large roller drive motor; 8. a double-roller gap adjusting mechanism; 11. a large roller; 12. a small roller; 16. a roll centerline; 111. convex sawteeth I; 112. concave sawteeth I; 121. convex sawteeth II; 122. concave sawteeth II.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings.

Example 1

A sawtooth-shaped double-roller drum-type rubber pulverizer of the present embodiment, as shown in fig. 1, 2, and 3, includes a machine base 2, a large roller 11 and a small roller 12 which are rotatably fixed on the machine base 2 through a bearing 3 and a bearing seat thereof, and rotate in opposite directions in a parallel state, the machine base 2 may be a frame-shaped structure, two sides of which are fixed wall-shaped bodies of vertical fixed double rollers, the bearing seats are fixed in the walls, and the double rollers are fixed inside the two fixed walls through the bearing 3 in the bearing seat by their central shafts; the rotation of the large roller 11 and the small roller 12 is respectively driven by a large roller driving motor 7 and a small roller driving motor 6 which are in end head transmission connection, and the large roller driving motor 7 and the small roller driving motor 6 are fixed on the outer side of the fixed wall through flange plates; as shown in fig. 4 and 5, the roll surfaces of the large roll 11 and the small roll 12 are respectively provided with convex and concave sawteeth in an axially parallel state in a staggered manner, as shown in fig. 6, the convex sawteeth i 111, the concave sawteeth i 112, the convex sawteeth ii 121 and the concave sawteeth ii 122; as shown in fig. 5 and 7, the convex and concave serrations make an oblique angle θ with the roller center line 16 of the twin roller.

The roller-type rubber milling machine with the double saw-toothed rollers can be applied to secondary processing of rubber particles into fine particles, for example, large-particle materials with the diameter of 5-50 mm are processed into small-particle materials with the diameter of 5-100 meshes. In the concrete use, the combined design of zigzag structure and the inclined contained angle theta on the two rollers of milling machine, the mode that the material between the two sawtooth of assurance two roller operation in-process cuts is smashed, and avoid the mode that traditional rubbed the mill, make the farine that obtains mainly with the graininess, moreover, compare in the mode that the soft non-metallic material of prior art smashed the rubbed mill, can also reduce the thermal production among the crushing process in the cutting process, guarantee that the temperature that produces can cool off fast, avoid the overheated desulfurization or the gelatinization state that appears of partial rubber powder, thereby play unexpected technological effect.

Example 2

The roller-type rubber pulverizer with the double rollers and the saw-toothed structure of the embodiment is further improved on the basis of embodiment 1, when the double rollers rotate, the convex saw teeth and the concave saw teeth are in one-to-one matching correspondence of the convex saw teeth I111 and the convex saw teeth II 121, and the concave saw teeth I112 and the concave saw teeth II 122, so that part of materials are prevented from being cut by mistake in the cutting process, and the purpose of uniformly cutting rubber powder is achieved. Also because of the corresponding relation of the two concave saw teeth, the concave saw teeth I112 and the concave saw teeth II 122 form a pressure equalizing groove when the double rollers rotate to cut materials, so that the materials cut by the saw teeth are guaranteed, for example, rubber powder enters the pressure equalizing groove through extrusion and then leaks to achieve the effect of stabilizing pressure, the situation that the materials are locally accumulated and the pressure is too high to cause the temperature rise and desulfurization or carbonization of powder is avoided, and the cut materials are separated from the pressure equalizing groove due to the self gravity and fall into a hopper under the double rollers under the effect of vibration generated by the rotation of the double rollers.

Example 3

The sawtooth-shaped double-roller drum-type rubber pulverizer of the embodiment is further improved on the basis of the embodiment 2, and the rotating speed ratio of the large roller 11 to the small roller 12 is 1-12: 1, under other conditions, such as certain conditions of roller diameter, oblique included angle theta and the like, the larger the rotation speed ratio is, the larger the heat generated by shearing is, the higher the efficiency of the cutting mode for grinding powder is, and the smaller the reverse rotation speed ratio is, the smaller the heat generated by shearing is, and the lower the efficiency of the cutting mode for grinding powder is; meanwhile, the larger the rotation speed ratio is, the larger the heat generated by shearing is, the larger the energy consumption of cooling loss through cooling water is, and the lower the utilization rate of the energy is; when the rotation speed ratio is lower, the milling efficiency of the cutting mode is lower, the yield of the rubber powder is too low, and the rubber powder with the required granularity is difficult to generate; therefore, on the premise of ensuring the maximum productivity of the rubber powder with the required granularity, the rotating speed ratio is 1-12: 1, the heat generated by shearing can be controlled to the maximum extent; as shown in fig. 6, the front angle α of each of the convex sawteeth i 111 and ii 121 in the rotation direction is smaller than the rear angle β, that is, the front angle α is an acute angle and ranges from 60 ° to 89 °; the back angle beta is an obtuse angle, the angle range is 91-120 degrees, and the effect is that the collision of the convex sawteeth I111 and the convex sawteeth II 121 generates shearing force.

Example 4

The sawtooth-shaped double-roller drum-type rubber pulverizer of the embodiment is further improved on the basis of the embodiment 3, the included angle theta is 5-20 degrees, and if the included angle theta is too small, the cutting edge is sharp, the strength is low, and the service life is short due to easy abrasion during pulverizing in a cutting mode; the included angle theta is too large, the cutting edge is wider, the strength is higher, the colloidal particle cutting mode is even difficult to grind the colloidal powder to the required granularity when the colloidal particle is ground by the cutting mode, namely the grinding is difficult, the included angle theta is 5-20 degrees, and the requirements of service life and ground powder granularity can be considered; the oblique direction of convex sawtooth I111 and convex sawtooth II 121 is consistent, so that shearing deviation is avoided, and shearing efficiency is improved.

Example 5

The sawtooth-shaped double-roller type rubber mill of the embodiment is further improved on the basis of the embodiment 4, and the diameter ratio of the large roller 11 and the small roller 12 is as follows: 1.1-2.2: 1, shearing difference is formed, when the diameter ratio is too large, the service lives of the two rollers are greatly different, the efficiency of combined production is reduced, and when the diameter ratio is too small, tooth grooves are easily meshed to influence the shearing effect; the rotating speed ratio and the included angle theta are matched, the combined action effect is achieved, and the shearing heat, the shearing efficiency, the shearing granularity and the service life can be considered. The gap between the large roller 11 and the small roller 12 is adjusted by a double-roller gap adjusting mechanism 8, and the double-roller gap adjusting mechanism 8 can adopt the structure combination of a ball screw, a sliding block and a sliding rail in the prior art, namely a bearing seat is fixedly connected with the sliding block; the ball screw penetrates through the center of the slider with the threads inside, slide rails are arranged on two sides of the slider, the ball screw is arranged in the middle of the slide rails, and the end head of the ball screw is externally connected with an adjusting motor; the large roller driving motor 7 and the small roller driving motor 6 are both hydraulic motors, have good stability, and further improve the granularity of stable products under the synergistic effect of the large roller driving motor and the small roller driving motor and the pressure equalizing groove.

Example 6

The sawtooth-shaped double-roller drum-type rubber pulverizer of the embodiment is further improved on the basis of the embodiment 2, the gap between the large roller 11 and the small roller 12 is 0.01-2 mm, and the adjustment is performed according to the particle size requirement. The widths of the convex sawteeth and the concave sawteeth are consistent, the heights of the convex sawteeth are consistent with the depths of the concave sawteeth, so that a stable pressure equalizing groove is formed, and stable and uniform product granularity is produced; the inner cavities of the large roller 11 and the small roller 12 are externally connected with circulating cooling water through the cooling water connector 4, so that heat generated by shearing is taken away in time, and high-temperature desulfurization and even oxidative degradation of materials are avoided. Moreover, the design of the angle between the convex sawteeth I111 and the convex sawteeth II 121 with sharp front and back is adopted, so that the time for temporarily storing the cut powder in the groove can be longer by the pressure equalizing groove, the heat can be taken away by cooling water more timely, and the desulfurization of rubber particles can be avoided more favorably.

Example 7

The roller type rubber pulverizer with the double rollers in the sawtooth shape is further improved on the basis of the embodiment 6, wherein the rotating speed of the large roller 11 is 260-620 r/min, the rotating speed of the small roller 12 is 25-86 r/min, and the gap between the double rollers is 0.01-2 mm; the diameter of the large roller is 450-830 mm, and the diameter of the small roller is 380-720 mm; the included angle theta is 5-20 degrees; the grain diameter of the rubber powder obtained by grinding in a cutting mode is 5-100 meshes; the method can be applied to secondary cutting type crushing of rubber particles, and the cutting type grinding method comprises the following steps:

step one, adjusting a gap: adjusting the gap between the large roller 11 and the small roller 12 according to the size requirement of ground rubber;

step two, starting the double rollers: the two rollers are started to rotate oppositely by starting the large roller driving motor 7 and the small roller driving motor 6;

step three, feeding: the coarse sizing material particles are fed into the gap in a free falling mode through a hopper right above the gap between the large roller 11 and the small roller 12;

step four, cutting type grinding: under the synergistic action of the convex sawteeth I111 and the convex sawteeth II 121, the front angles alpha of the two sawteeth are acute angles, a shearing force is formed when the front angles alpha approach each other, the coarse sizing material is sheared, and the sheared fine sizing material is extruded into the equalizing groove under the action of extrusion force; at this time, the cooling water circulation can be started to immediately take away the heat generated by cutting.

Step five, blanking: with the rotation of the double rollers, the fine materials in the pressure equalizing grooves naturally fall into the fine material temporary storage hopper under the vibration effect generated by the rotation of the double rollers.

The twin roll gap was adjusted by the twin roll gap adjustment mechanism 8 using the test data in table 1 and collecting data for comparative test samples one, two, three and four respectively:

TABLE 1 comparison of test data for test samples one, two, three and four

As can be seen from Table 1, the rubber powder prepared by the test sample four has better production effects in the aspects of particle shape, capacity, material temperature, particle size and the like, the comprehensive index is the best, and the rotating speed ratio of the large roller to the small roller is proved to be 8: 1 is the optimum rotation speed ratio.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the present invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solutions, but shall fall within the protection scope of the present invention.

Claims (9)

1. A roller-type rubber pulverizer with saw-tooth-shaped double rollers comprises a pulverizer base (2), a large roller (11) and a small roller (12), wherein the large roller and the small roller are rotationally fixed on the pulverizer base (2) through a bearing (3) and a bearing seat thereof and rotate oppositely in a parallel state; big roller (11) and rotation of little roller (12) are respectively through big roller driving motor (7) and the drive of little roller driving motor (6) that its end transmission formula is connected, its characterized in that: convex sawteeth and concave sawteeth which are in an axial parallel state are arranged on the roll surfaces of the large roll (11) and the small roll (12) in a staggered mode, wherein the convex sawteeth are convex sawteeth I (111), concave sawteeth I (112), convex sawteeth II (121) and concave sawteeth II (122); the convex and concave sawteeth form an oblique included angle theta with a roller central line (16) of the double roller.

2. A saw-tooth double-roller type rubber mill according to claim 1, characterized in that the convex and concave saw teeth are in one-to-one matching correspondence of convex saw teeth i (111) and convex saw teeth ii (121), and concave saw teeth i (112) and concave saw teeth ii (122) when the double rollers rotate; the concave sawteeth I (112) and the concave sawteeth II (122) form a uniform pressure groove when the double rollers rotate to cut materials.

3. A saw-toothed double-roller type rubber pulverizer as claimed in claim 2, characterized in that the rotation speed ratio of the large roller (11) and the small roller (12) is (1-12): 1; and the front angle alpha of each convex sawtooth I (111) and the front angle alpha of each convex sawtooth II (121) in the rotating direction are smaller than the rear angle beta.

4. A saw-toothed, double-roller, roller-type rubber mill according to claim 3, characterized in that: the diameter ratio of the large roller (11) to the small roller (12) is as follows: (1.1-2.2): 1; the included angle theta is 5-20 degrees; the oblique directions of the convex sawteeth I (111) and the convex sawteeth II (121) are consistent.

5. A saw-toothed, double-roller, roller-type rubber mill according to claim 3, characterized in that: the gap between the large roller (11) and the small roller (12) is 0.01-2 mm; the widths of the convex sawteeth and the concave sawteeth are consistent, and the heights of the convex sawteeth and the concave sawteeth are consistent.

6. A saw-toothed, double-roller, roller-type rubber mill according to claim 3, characterized in that: the inner cavities of the large roller (11) and the small roller (12) are externally connected with circulating cooling water through a cooling water interface (4).

7. A saw-toothed, double-roller, roller-type rubber mill according to claim 3, characterized in that: the gap between the large roller (11) and the small roller (12) is adjusted by a double-roller gap adjusting mechanism (8).

8. A saw-toothed, double-roller, roller-type rubber mill according to any one of claims 1 to 7, characterized in that: the large roller driving motor (7) and the small roller driving motor (6) are both hydraulic motors.

9. A saw-toothed, double-roller, roller-type rubber mill according to claim 8, characterized in that: the rotation speed ratio of the large roller (11) to the small roller (12) is 8: 1.