Grinding device for plastic refractory production

Abstract

The invention provides a plastic material production grinding device which comprises a rack, a driving mechanism is arranged on the rack, a grinding cylinder is arranged on the driving mechanism in a transmission mode, a protective cylinder is further arranged on the driving mechanism and located on the outer side of the grinding cylinder, and a grading grinding mechanism is arranged in the grinding cylinder. The driving mechanism is used for driving the grinding cylinder and the graded grinding mechanism to rotate together, so that the graded grinding mechanism grinds materials in the grinding cylinder, and the graded grinding mechanism is used for carrying out partitioned graded grinding operation on the materials with different granularities; the driving mechanism can drive the grinding cylinder to drive the grading grinding mechanism in the grinding cylinder to achieve efficient, repeated, rapid and repeated grinding operation on materials with different granularities in the grinding cylinder, an operator does not need to screen screened powder and then conduct secondary grinding operation, the grinding efficiency is higher, and the effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of grinding devices, in particular to a grinding device for plastic production. Background Art

[0002] A type of plastic, amorphous refractory material, made of 70% to 80% granular and powdery materials, 10% to 25% plastic clay and other binders, and an appropriate amount of plasticizer.

[0003] In the process of plastic processing, it is necessary to grind the plastic raw materials into powder. Moreover, the current plastic grinding machines only grind once, and there are still a lot of particles in the powder. In order to reduce the particles, it is necessary to screen the material, and the powder that does not meet the standards needs to be ground a second time. If the powder that does not meet the standards is not screened out, the second grinding will be carried out. Because the powder that meets the standards will wrap the powder that does not meet the standards, the powder that does not meet the standards will not be easily ground the second time. However, screening the powder requires a lot of time and manpower, which will increase the production cost. Summary of the invention

[0004] In view of this, the present invention provides a grinding device for plastic production, which can drive the grinding cylinder and the grading grinding mechanism in the grinding cylinder through a driving mechanism to realize efficient, repeated and rapid multiple grinding operations on materials of different particle sizes in the grinding cylinder. There is no need for operators to screen the screened powder and then perform a secondary grinding operation. The grinding efficiency is higher and the effect is better, which greatly reduces the unnecessary cost occupation and unnecessary waste of manpower and material costs caused by the need to screen the ground material for secondary grinding due to incomplete grinding caused by traditional primary grinding.

[0005] In order to solve the above technical problems, the present invention provides a grinding device for plastic production, comprising a frame, a driving mechanism is arranged on the frame, a grinding cylinder is arranged on the driving mechanism for transmission, a protective cylinder is also arranged on the driving mechanism, the protective cylinder is located on the outside of the grinding cylinder, a graded grinding mechanism is arranged inside the grinding cylinder, the driving mechanism is used to drive the grinding cylinder and the graded grinding mechanism to rotate together, so that the graded grinding mechanism can grind the material in the grinding cylinder, and the graded grinding mechanism is used to perform zoned and graded grinding operations on materials of different particle sizes.

[0006] The graded grinding mechanism includes grinding components respectively arranged on the two inner end surfaces of the grinding cylinder, each grinding component includes a fixed plate, a fixed rod is arranged on the fixed plate, a grinding plate is slidably arranged on the fixed rod, a plurality of telescopic sleeve rods are evenly arranged on the outer side wall of the grinding plate, and a plurality of grinding balls are rotatably arranged at the end of each telescopic sleeve rod.

[0007] The driving mechanism includes a motor arranged on a frame, a driving gear is arranged at the end of the output shaft of the motor, a driven gear is meshed on the driving gear, a rotating shaft is arranged on the axis of the driven gear, a rotating sleeve is arranged at the end of the rotating shaft, a fixed part of the rotating sleeve passes through the side wall of the protective cylinder, a connecting shaft is arranged in the rotating part of the rotating sleeve, and the other end of the connecting shaft is fixed to the outer wall of the grinding cylinder.

[0008] The other end of the grinding cylinder is rotatably arranged on the inner wall of the protective cylinder through a supporting shaft and a bearing. The supporting shaft and the inner ring of the bearing are fixed together, and the outer ring of the bearing is fixed on the inner wall of the protective cylinder.

[0009] The telescopic sleeve comprises a fixed cylinder arranged on the outer side wall of the grinding disc, a spring is arranged inside the fixed cylinder, a grinding rod is arranged on the upper part of the spring, an arc-shaped grinding plate is arranged at the end of the grinding rod, and a grinding ball is embedded in the arc-shaped grinding plate.

[0010] A baffle plate for limiting the grinding disc is provided at the end of the fixed rod. The present invention can limit and block the axial position of the grinding disc during the sliding process of the grinding disc along the fixed rod driven by the rotating grinding cylinder through the baffle plate, thereby preventing the grinding disc from slipping out of the fixed rod, which is more stable and convenient.

[0011] A pair of filter plates are respectively arranged inside the grinding cylinder and between the two baffles. A plurality of filter mesh holes are respectively opened on the two filter plates. The aperture of the filter mesh holes on one filter plate is larger than the aperture of the filter mesh holes on the other filter plate.

[0012] A feed pipe is arranged on the upper part of the protective cylinder, the feed pipe passes through the side walls of the protective cylinder and the grinding cylinder and is located directly above the two filter plates. The present invention can facilitate the smooth introduction of the material to be ground into the grinding cylinder through the feed pipe, which is more convenient.

[0013] A discharge pipe is arranged at the lower part of the protection cylinder and directly below the feed pipe. The discharge pipe penetrates the side walls of the protection cylinder and the grinding cylinder and is directly below the two filter plates.

[0014] A discharge filter plate is arranged on the upper part of the discharge pipe and on the side wall of the grinding cylinder. The present invention can smoothly discharge materials that meet the grinding particle size requirements through the discharge filter plate arranged on the upper part of the discharge pipe, and block materials that are larger than the grinding particle size requirements so that they remain in the grinding cylinder and are repeatedly ground until they meet the particle size requirements and are discharged.

[0015] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0016] 1. The present invention can drive the grinding cylinder and the grading grinding mechanism in the grinding cylinder through the driving mechanism to realize the efficient, repeated and rapid multiple grinding operations on the materials of different particle sizes in the grinding cylinder. There is no need for operators to screen the screened powder and then perform secondary grinding operations. The grinding efficiency is higher and the effect is better. It greatly reduces the unnecessary cost occupation and unnecessary waste of manpower and material costs caused by the need to screen the ground materials for secondary grinding due to incomplete grinding caused by traditional primary grinding.

[0017] 2. The present invention can drive the grinding disc on the graded grinding mechanism inside the rotating grinding cylinder to slide along the fixed rod while the grinding disc rotates under the centrifugal force and the sleeve and guiding action of the fixed rod on the grinding disc. At the same time, under the action of the telescopic sleeve rod, the grinding ball is driven to grind the material between the grinding disc and the inner wall of the grinding cylinder efficiently and quickly, so that the grinding effect is better and the efficiency is higher.

[0018] 3. The present invention can drive the driving gear to rotate together with the driven gear meshing with it through the rotation of the output shaft of the motor. The meshing action of the driving gear and the driven gear, plus the fixing action of the rotating part of the rotating sleeve and the rotating shaft on the driven gear, and the fixing action of the rotating part of the rotating sleeve and the connecting shaft and the outer wall of the grinding cylinder, the rotating part of the rotating sleeve will rotate together with the driven gear, the rotating shaft, the rotating part of the rotating sleeve, the connecting shaft and the grinding cylinder, thereby realizing the efficient and rapid graded grinding operation of the material in the grinding cylinder while rotating the multi-stage grinding mechanism inside the grinding cylinder, with better grinding effect and higher efficiency.

[0019] 4. The present invention can guide and support the axial rotation of the grinding cylinder by means of the bearing and the supporting shaft, which greatly increases the stability of the grinding cylinder during rotation, alleviates the axial impact force on the connecting shaft, and greatly increases the service life of the connectable shaft.

[0020] 5. The present invention can realize effective screening of the material to be ground through a pair of filter plates with different filter mesh diameters, which is convenient for realizing the rapid discharge of the material that meets the grinding accuracy requirements, and at the same time, the material with a particle size larger than the required size is repeatedly graded and ground multiple times, which greatly improves the grinding efficiency and achieves a better grinding effect.

[0021] 6. The present invention can rotate the fixed cylinder together with the grinding disc. At this time, the grinding rod will pull the spring to stretch under the action of the centrifugal force of the rotation, and then push the arc-shaped grinding plate with the grinding balls thereon to crush the material to be ground inside the grinding cylinder while rotating, so that the grinding effect is better and the grinding efficiency is higher. When the grinding cylinder stops rotating, the grinding rod can rely on its own movement inertia and the restoring elastic force of the spring to pull the arc-shaped grinding plate and the grinding balls at the starting end to perform axial reciprocating motion, so as to realize further grinding of the material in the grinding cylinder, so that the grinding effect is better and more energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a grinding device for plastic production of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the protective cylinder, the grinding cylinder and the graded grinding mechanism in the grinding device for plastic production of the present invention;

[0024] Figure 3 It is a side view of the protective cylinder, the grinding cylinder and the graded grinding mechanism in the grinding device for plastic production of the present invention;

[0025] Figure 4 For the present invention Figure 3 Sectional view at AA;

[0026] Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle.

[0027] Explanation of the reference numerals: 100, frame; 200, driving mechanism; 201, motor; 202, driving gear; 203, driven gear; 204, rotating shaft; 205, rotating sleeve; 300, grinding cylinder; 400, protective cylinder; 500, graded grinding mechanism; 510, grinding assembly; 511, fixed plate; 512, fixed rod; 513, grinding plate; 514, telescopic sleeve; 515, grinding ball; 516, arc-shaped grinding plate; 517, baffle plate; 600, filter plate; 700, feed pipe; 800, discharge pipe; 900, discharge filter plate. DETAILED DESCRIPTION

[0028] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the appended drawings of the embodiments of the present invention. Figure 1-5 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0029] like Figure 1-5 As shown: This embodiment provides a grinding device for plastic production, including a frame 100, a driving mechanism 200 is arranged on the frame 100, a grinding cylinder 300 is arranged on the driving mechanism 200, a protective cylinder 400 is also arranged on the driving mechanism 200, the protective cylinder 400 is located on the outside of the grinding cylinder 300, and a graded grinding mechanism 500 is arranged inside the grinding cylinder 300. The driving mechanism 200 is used to drive the grinding cylinder 300 and the graded grinding mechanism 500 to rotate together, so that the graded grinding mechanism 500 can grind the material in the grinding cylinder 300, and the graded grinding mechanism 500 is used to grind the material in the grinding cylinder 300. Materials of different particle sizes are subjected to zoned and graded grinding operations. The present invention can drive the grinding cylinder 300 and the graded grinding mechanism 500 in the grinding cylinder 300 through the driving mechanism 200 to realize efficient, repeated and rapid multiple grinding operations on materials of different particle sizes in the grinding cylinder 300. There is no need for operators to screen the screened powder and then perform a secondary grinding operation. The grinding efficiency is higher and the effect is better, which greatly reduces the unnecessary cost occupation and unnecessary waste of manpower and material costs caused by the need to screen the ground material for secondary grinding due to incomplete grinding caused by traditional primary grinding.

[0030] According to one embodiment of the present invention, Figure 1-5 As shown, the graded grinding mechanism 500 includes grinding assemblies 510 respectively arranged on the two inner end surfaces of the grinding cylinder 300, each grinding assembly 510 includes a fixed plate 511, a fixed rod 512 is arranged on the fixed plate 511, a grinding plate 513 is slidably arranged on the fixed rod 512, a guide bar is provided on the outer side wall of the fixed rod 512, and a guide groove matched with the guide bar is provided on the grinding plate 513. Under the guidance and limiting action of the guide groove and the guide bar on the fixed rod 512, the grinding plate 513 is slidably arranged on the fixed rod 512, and the outer side of the grinding plate 513 A plurality of telescopic sleeve rods 514 are evenly arranged on the wall, and a plurality of grinding balls 515 are rotatably arranged at the end of each telescopic sleeve rod 514. The present invention can drive the grinding disc 513 on the graded grinding mechanism 500 therein to rotate through the rotating grinding cylinder 300. Under the centrifugal force and the sleeve and guiding action of the fixed rod 512 on the grinding disc 513, the grinding disc 513 rotates and slides along the fixed rod 512. At the same time, under the action of the telescopic sleeve rod 514, the grinding balls 515 are driven to efficiently and quickly grind the material between the telescopic sleeve rod 514 and the inner wall of the grinding cylinder 300, so as to achieve better grinding effect and higher efficiency.

[0031] According to another embodiment of the present invention, Figure 1As shown, the driving mechanism 200 includes a motor 201 arranged on the frame 100, a driving gear 202 is arranged at the end of the output shaft of the motor 201, a driven gear 203 is meshed with the driving gear 202, a rotating shaft 204 is arranged on the axis of the driven gear 203, a rotating sleeve 205 is arranged at the end of the rotating shaft 204, a fixed portion of the rotating sleeve 205 passes through the side wall of the protective cylinder 400, a connecting shaft is arranged in the rotating portion of the rotating sleeve 205, and the other end of the connecting shaft is fixedly arranged with the outer wall of the grinding cylinder 300. The present invention can drive the driving gear 202 to drive the driven gear 203 meshed with it through the rotation of the output shaft of the motor 201. 3, the meshing action of the driving gear 202 and the driven gear 203, the fixing action of the rotating part of the rotating sleeve 205 and the rotating shaft 204 on the driven gear 203, and the fixing action of the rotating part of the rotating sleeve 205 and the connecting shaft and the outer wall of the grinding cylinder 300, the rotating part of the rotating sleeve 205 will rotate with the driven gear 203 with the rotating shaft 204 and the rotating part of the rotating sleeve 205 and the connecting shaft and the grinding cylinder 300, thereby realizing the efficient and rapid graded grinding operation of the materials in the grinding cylinder 300 while rotating the multi-stage grinding mechanism inside the grinding cylinder 300, and achieving better grinding effect and higher efficiency.

[0032] According to another embodiment of the present invention, Figure 1 and Figure 2 As shown, the other end of the grinding cylinder 300 is rotatably set on the inner wall of the protective cylinder 400 through a support shaft and a bearing, the support shaft and the inner ring of the bearing are fixed together, and the outer ring of the bearing is fixed on the inner wall of the protective cylinder 400. The present invention can guide and support the axial rotation of the grinding cylinder 300 through the bearing cooperating with the support shaft, which greatly increases the stability of the grinding cylinder 300 during rotation, alleviates the axial impact force on the connecting shaft, and greatly improves the service life of the connectable shaft.

[0033] According to another embodiment of the present invention, Figure 1 and Figure 5As shown, the telescopic sleeve 514 includes a fixed cylinder arranged on the outer side wall of the grinding disc 513, a spring is arranged inside the fixed cylinder, a grinding rod is arranged on the upper part of the spring, an arc-shaped grinding plate 516 is arranged at the end of the grinding rod, an elastic rubber stopper is arranged between the grinding rod and the fixed cylinder to prevent the ground material from entering the fixed cylinder and causing the spring to be stuck, and the grinding ball 515 is embedded in the arc-shaped grinding plate 516. The present invention can rotate with the fixed cylinder through the rotation of the grinding disc 513, and at this time, the grinding rod will pull the spring into the fixed cylinder under the action of the centrifugal force of the rotation. The arc-shaped grinding plate 516 is stretched, and then the arc-shaped grinding plate 516 is pushed to roll with the grinding balls 515 thereon to crush the material to be ground inside the grinding cylinder 300 while rotating, so that the grinding effect is better and the grinding efficiency is higher. When the grinding cylinder 300 stops rotating, the grinding rod can rely on its own movement inertia and the restoring elastic force of the spring to pull the arc-shaped grinding plate 516 and the grinding balls 515 at the starting end to perform axial reciprocating motion, so as to further grind the material in the grinding cylinder 300, so that the grinding effect is better and more energy-saving.

[0034] A baffle 517 for limiting the grinding disc 513 is provided at the end of the fixed rod 512. The present invention can limit and block the axial position of the grinding disc 513 during the sliding process of the grinding disc 513 along the fixed rod 512 driven by the rotating grinding cylinder 300 through the baffle 517 to prevent it from slipping out of the fixed rod 512, which is more stable and convenient.

[0035] According to another embodiment of the present invention, Figure 1 , Figure 2 and Figure 5 As shown, a pair of filter plates 600 are respectively arranged inside the grinding cylinder 300 and between the two baffles 517, and a plurality of filter mesh holes are respectively opened on the two filter plates 600. The aperture of the filter mesh holes on one filter plate 600 is larger than the aperture of the filter mesh holes on the other filter plate 600. The present invention can realize effective screening of the material to be ground by a pair of filter plates 600 with different filter mesh hole diameters, and facilitates the rapid discharge operation of the material that meets the grinding accuracy requirements. At the same time, the material with a particle size larger than the required particle size is repeatedly graded and ground multiple times, which greatly improves the grinding efficiency and achieves a better grinding effect.

[0036] According to another embodiment of the present invention, Figure 1 and Figure 4 As shown, a feed pipe 700 is provided on the upper part of the protective cylinder 400. The feed pipe 700 passes through the side walls of the protective cylinder 400 and the grinding cylinder 300 and is located directly above the two filter plates 600. The present invention can facilitate the smooth introduction of the material to be ground into the grinding cylinder 300 through the feed pipe 700, which is more convenient.

[0037] A discharge pipe 800 is provided at the lower part of the protection cylinder 400 and directly below the feed pipe 700 . The discharge pipe 800 penetrates the side walls of the protection cylinder 400 and the grinding cylinder 300 and is directly below the two filter plates 600 .

[0038] A discharge filter plate 900 is provided at the upper part of the discharge pipe 800 and on the side wall of the grinding cylinder 300. The present invention can smoothly discharge materials that meet the grinding particle size requirements through the discharge filter plate 900 provided on the upper part of the discharge pipe 800, and block materials that are larger than the grinding particle size requirements so that they remain in the grinding cylinder 300 and are repeatedly ground until they meet the particle size requirements and are discharged.

[0039] The filter plate 600 between the two baffles 517 can also be modified and replaced by a pair of filter barrels with openings far away from each other, and the bottoms of the filter barrels are provided with filter plate 600 mesh holes, and the aperture of the filter mesh holes on one of the filter barrels is larger than the aperture of the filter mesh holes on the other filter barrel, and the height of the filter barrel is larger than the radius of the feed pipe 700, and a circle of multiple through holes that pass through the side wall of the filter barrel that meet the particle size screening requirements are opened on the side wall of the filter barrel, and through grooves are opened on the outer sides of the through holes on both sides of the filter barrel, which are respectively used to pass the feed pipe 700 through the filter plate 600. The fallen materials are guided to the grinding cylinders 300 on the left and right sides respectively. This has three purposes. First, the materials that meet the particle size requirements and fall through the feed pipe 700 can be directly screened and passed without repeated grinding. Second, the materials can be divided and graded for grinding through the two through grooves, which has better grinding effect and higher efficiency. Third, the materials of different particle sizes in the two areas can be divided and graded for grinding through the filter barrel. There is no need to prepare multiple sets of grinding equipment, and repeated and efficient grinding operations can be achieved, which makes the operation more convenient and efficient.

[0040] The method of using the present invention:

[0041] First of all, it should be made clear that the grinding device involved in the present invention is mainly used for grinding and crushing various particles or block-shaped objects after crushing. The present invention takes the grinding of plastic such as clay blocks as an example to explain its use method in detail. When it is necessary to grind the plastic raw material, first connect the feeding mechanism such as the discharge port of the feeding auger with the feed pipe 700 at the upper part of the protective cylinder 400, and then place a feeding conveyor belt at the lower part of the discharge pipe 800 at the lower part of the protective cylinder 400, and then start the feeding auger and the conveyor to work at the same time. At this time, the feeding auger will guide the raw material to be crushed into the feed pipe 700 through the discharge port, and then the feed pipe 700 at the lower part of the feed pipe 700 will be connected to the feed pipe 700. Due to the blocking and separation effect of the filter plate 600, the materials will be transported to the grinding cylinder 300 on both sides of the filter plate 600 respectively. After a sufficient amount of raw materials enter, the conveying auger is closed, and then the output shaft of the motor 201 is started to rotate. The rotation of the output shaft of the motor 201 drives the driving gear 202 to drive the driven gear 203 meshing with it to rotate together. The meshing effect of the driving gear 202 and the driven gear 203, plus the fixing effect of the rotating part of the rotating sleeve 205 and the rotating shaft 204 on the driven gear 203, as well as the fixing effect of the rotating part of the rotating sleeve 205 and the connecting shaft and the outer wall of the grinding cylinder 300, the rotating part of the rotating sleeve 205 will be on the driven gear 203 with the rotating shaft 204 and The rotating part of the rotating sleeve 205 rotates together with the connecting shaft and the grinding cylinder 300, thereby realizing the multi-stage grinding mechanism inside the grinding cylinder 300 to rotate while realizing efficient and rapid graded grinding of the material in the grinding cylinder 300. The ground material that meets the grinding particle size requirement is filtered through the discharge filter plate 900 arranged on the upper part of the discharge pipe 800 and is discharged smoothly. At the same time, the discharge filter plate 900 will block the material larger than the grinding particle size requirement, so that it will remain in the grinding cylinder 300 and be repeatedly ground until it meets the particle size requirement and is discharged. During the grinding process, the filter plate 600 can pass the material on both sides that meets the grinding particle size requirement, and filter the material that does not meet the grinding particle size requirement. The material is blocked, so that the grinding materials on the left and right sides can be connected to each other and grind alternately, with better grinding effect and higher efficiency. The present invention can drive the grinding cylinder 300 with the grading grinding mechanism 500 in the grinding cylinder 300 through the driving mechanism 200 to realize efficient, repeated and rapid multiple grinding operations on materials of different particle sizes in the grinding cylinder 300. There is no need for operators to screen the screened powder and then perform a secondary grinding operation. The grinding efficiency is higher and the effect is better, which greatly reduces the unnecessary cost occupation and unnecessary waste of manpower and material costs caused by the incomplete grinding caused by the traditional one-time grinding and the need to screen the ground material for secondary grinding.

[0042] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A grinding device for plastic production, comprising a frame (100), characterized in that: The frame (100) is provided with a driving mechanism (200), a grinding cylinder (300) is driven and arranged on the driving mechanism (200), a protective cylinder (400) is further provided on the driving mechanism (200), the protective cylinder (400) is located outside the grinding cylinder (300), a graded grinding mechanism (500) is provided inside the grinding cylinder (300), the driving mechanism (200) is used to drive the grinding cylinder (300) and the graded grinding mechanism (500) to rotate together, so that the graded grinding mechanism (500) can grind the material in the grinding cylinder (300), and the graded grinding mechanism (500) is used to perform graded grinding operations on materials of different particle sizes in different zones.

2. The grinding device for plastic production as claimed in claim 1, characterized in that: The graded grinding mechanism (500) comprises grinding assemblies (510) respectively arranged on two inner end surfaces of a grinding cylinder (300), each of the grinding assemblies (510) comprises a fixed disk (511), a fixed rod (512) is arranged on the fixed disk (511), a grinding disk (513) is slidably arranged on the fixed rod (512), a plurality of telescopic sleeve rods (514) are evenly arranged on the outer side wall of the grinding disk (513), and a plurality of grinding balls (515) are rotatably arranged at the end of each telescopic sleeve rod (514).

3. The grinding device for plastic production as claimed in claim 2, characterized in that: The driving mechanism (200) comprises a motor (201) arranged on a frame (100); a driving gear (202) is arranged at the end of the output shaft of the motor (201); a driven gear (203) is meshedly arranged on the driving gear (202); a rotating shaft (204) is arranged on the axis of the driven gear (203); a rotating sleeve (205) is arranged at the end of the rotating shaft (204); a fixed portion of the rotating sleeve (205) passes through the side wall of the protective cylinder (400); a connecting shaft is arranged in the rotating portion of the rotating sleeve (205); and the other end of the connecting shaft is fixedly arranged with the outer wall of the grinding cylinder (300).

4. The grinding device for plastic production as claimed in claim 3, characterized in that: The other end of the grinding cylinder (300) is rotatably arranged on the inner wall of the protective cylinder (400) via a support shaft and a bearing. The support shaft and the inner ring of the bearing are fixed together, and the outer ring of the bearing is fixed on the inner wall of the protective cylinder (400).

5. The grinding device for plastic production as claimed in claim 4, characterized in that: The telescopic sleeve (514) comprises a fixed tube arranged on the outer wall of the grinding disc (513), a spring is arranged inside the fixed tube, a grinding rod is arranged on the upper part of the spring, an arc-shaped grinding plate (516) is arranged at the end of the grinding rod, and the grinding ball (515) is embedded in the arc-shaped grinding plate (516).

6. The grinding device for plastic production as claimed in claim 5, characterized in that: A stopper (517) for limiting the position of the grinding disc (513) is provided at the end of the fixing rod (512).

7. The grinding device for plastic production as claimed in claim 6, characterized in that: A pair of filter plates (600) are respectively arranged inside the grinding cylinder (300) and between the two baffles (517); a plurality of filter mesh holes are respectively provided on the two filter plates (600); the aperture of the filter mesh holes on one of the filter plates (600) is larger than the aperture of the filter mesh holes on the other filter plate (600).

8. The grinding device for plastic production as claimed in claim 7, characterized in that: A feed pipe (700) is provided on the upper portion of the protective cylinder (400), and the feed pipe (700) penetrates the side walls of the protective cylinder (400) and the grinding cylinder (300) and is located directly above the two filter plates (600).

9. The grinding device for plastic production as claimed in claim 8, characterized in that: A discharge pipe (800) is provided at the lower part of the protective cylinder (400) and directly below the feed pipe (700). The discharge pipe (800) penetrates the side walls of the protective cylinder (400) and the grinding cylinder (300) and is located directly below the two filter plates (600).

10. The grinding device for plastic production as claimed in claim 9, characterized in that: A discharge filter plate (900) is provided at the upper part of the discharge pipe (800) and on the side wall of the grinding cylinder (300).

Images