A double-roll extrusion granulator for plastic production and its use method

Abstract

The invention discloses a double-roller extrusion granulator for plastic production and a method of using the same, belonging to the technical field of granulation processing, comprising a machine body, two extrusion rollers that cooperate with each other to perform extrusion granulation are arranged between two bracket plates, a plurality of grooves that are equidistantly distributed are opened on the outer surface of the extrusion roller, a stripping assembly is arranged on the extrusion roller, an adjusting assembly is arranged inside the extrusion roller, and a self-screening assembly is arranged below the extrusion roller; the invention uses the guiding effect of the stripping assembly to allow gas to be synchronously ejected from the grooves on the two extrusion rollers, thereby achieving the effect of synchronous auxiliary stripping of the two extrusion rollers, and effectively improving the overall stripping effect; the outlet flow area of ​​the stripping assembly is adjusted by the adjusting assembly, and the size of the airflow thrust is adjusted, so that better stripping effects can be achieved for materials with different viscosity properties, and the self-screening assembly is driven by the gas circulating in the stripping assembly to screen material particles, thereby effectively improving the overall processing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of granulation processing, in particular to a double-roller extrusion granulator for plastic production and a use method thereof. Background Art

[0002] A granulator is a molding machine that can make materials into specific shapes. It is widely used in plastics, petrochemicals, pharmaceuticals, food, building materials, mining, rubber, chemicals and other fields. Some plastic polymers must be mixed and then granulated before being made into final products to become marketable raw materials. The double-roll extrusion in the granulator is mainly used for powdered materials. It uses two rollers that fit each other and the grooves on them to extrude and divide large pieces of material into small pieces. When in use, a certain amount of material often remains in the grooves on the extrusion rollers. The residual material will affect the extrusion effect of the next use and needs to be removed.

[0003] For example, Chinese patent announcement number CN103537226B discloses a roller granulator with internal jet unloading, in which the roller and the rotating shaft are hollow and interconnected, one end of the hollow rotating shaft is connected to an air pump, and a section of the hollow rotating shaft located inside the hollow roller is provided with a plurality of shaft outlet holes; and a cylinder outlet hole is provided at the bottom of the groove on the surface of the hollow roller, and the cylinder outlet hole is connected to the hollow roller. Therefore, the airflow discharged by the air pump reaches the hollow roller through the hollow rotating shaft, and is ejected through the shaft outlet hole and the cylinder outlet hole in turn, so that the particles are separated from the groove on the surface of the roller and enter the collection device; after the rollers are squeezed relative to each other to complete a granulation, no particles will remain on the surface, which will not affect the efficiency of the next granulation, or affect the quality of the next granulation.

[0004] In the above application, the particles are mainly separated from the grooves by jetting through the cylinder air holes. However, when extruding and granulating materials with different parameters such as viscosity, the wind speed of the jetted air flow cannot be adjusted relatively accurately and accordingly, which affects the material removal effect. If the wind speed of the gas is too high, it is easy to waste energy. In addition, cylinder air holes are only provided on the roller with grooves, and the cleaning effect of sticky residual materials on the raised surface of the roller is poor, resulting in the overall material removal and cleaning effect being not good enough, and there are certain limitations in use.

[0005] Therefore, it is necessary to provide a double-roll extrusion granulator for plastic production and a method of using the same to solve the above-mentioned technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a double-roll extrusion granulator for plastic production and a method of using the same, so as to solve the problem that the wind speed of the air flow blown out in the above-mentioned background technology cannot be adjusted more accurately and correspondingly, affecting the material removal effect, and the excessive wind speed of the gas blown out wastes energy and the cleaning effect of the sticky residual material on the raised surface of the roller is poor, resulting in the overall material removal and cleaning effect being not good enough.

[0007] To achieve the above-mentioned purpose, the solution of the present invention to the above-mentioned technical problem is as follows: A double-roller extrusion granulator for plastic production, comprising a machine body and two support plates fixed on the top of the machine body, two extrusion rollers for extrusion granulation being connected and rotatably connected between the two support plates, a plurality of grooves being provided on the outer surface of the extrusion roller, a stripping component for allowing particles to be separated from the grooves for auxiliary stripping being provided on the extrusion roller, and an adjusting component for adjusting the stripping force of the stripping component for different materials being provided inside the extrusion roller.

[0008] As a further scheme of the present invention, the stripping assembly includes an injection hole corresponding to the groove and arranged at the bottom of the groove, a flow cavity connected to the multiple injection holes is opened inside the extrusion roller, a joint shaft is fixed at the center of one end of the extrusion roller, one end of the extrusion roller is rotatably connected to the bracket plate through the joint shaft, a ventilation groove connected to the flow cavity is opened in the joint shaft, two ports of the ventilation grooves are rotatably connected with a diverter pipe, and the two diverter pipes are commonly connected to an air inlet pipe.

[0009] As a further solution of the present invention, the adjustment component includes an inner sleeve arranged inside the extrusion roller and slidingly fitting with the inner wall of the extrusion roller, the inner part of the inner sleeve is hollow and an air inlet connected to the ventilation groove is provided at one end of the inner sleeve close to the joint shaft, and a plurality of flow openings corresponding to the air jet holes are provided on the side of the inner sleeve.

[0010] As a further solution of the present invention, a nut sleeve is fixed on the end of the extrusion roller away from the joint shaft, a threaded rod is connected to the inner thread of the nut sleeve, the end of the threaded rod located inside the extrusion roller is rotatably connected to the inner sleeve, and a joint plate is fixed on the outer end of the threaded rod.

[0011] As a further solution of the present invention, a spring is arranged between one end of the built-in sleeve close to the joint shaft and the end of the extrusion roller, and a plurality of arc-shaped protrusions distributed in a ring shape are fixed on the side surface of the joint plate.

[0012] As a further solution of the present invention, a self-screening component is provided below the extrusion roller and cooperates with the stripping component to automatically screen the material particles. A built-in groove is opened inside the fuselage. The self-screening component includes a screen plate arranged at the bottom of the extrusion roller and located in the built-in groove. A sliding rod is fixed to one end of the screen plate, and the end of the sliding rod away from the screen plate slides through the side wall of the built-in groove and is fixed with a circular tooth plate. A support plate is fixed on the side of the bracket plate, and a connecting shaft is rotatably connected to the support plate, and an incomplete gear meshing with the circular tooth plate is fixed on the end of the connecting shaft.

[0013] As a further solution of the present invention, a fixing sleeve is fixed on the side of the connecting shaft, and a plurality of blade plates distributed in a ring are fixed on the side of the fixing sleeve. The outer cover of the blade plate is provided with an outer cover shell rotatably connected to the connecting shaft. The outer cover shell is fixed to the outer side wall of the fuselage through a connecting plate, and the interior of the outer cover shell is connected to an air supply pipe, and the end of the air inlet pipe away from the diversion pipe is connected to the interior of the outer cover shell.

[0014] As a further solution of the present invention, the port of the gas delivery pipe is aligned with the edge of the blade plate away from the center of the connecting shaft.

[0015] As a further solution of the present invention, the sieve plate is arranged obliquely, the lower end of the sieve plate extends out from the inside of the built-in groove, two baffles are fixed on the top side of the sieve plate, and the two baffles are symmetrically arranged at both ends of the sieve plate.

[0016] A method for using a double-roll extrusion granulator comprises the following steps:

[0017] S1. The motor drives the driving gear to rotate, and the meshing of the driving gear and the two transmission gears drives the two extrusion rollers to rotate in opposite directions. The material falls between the two extrusion rollers, and the grooves on the surface of the extrusion rollers squeeze the material into regular-shaped material particles through the extrusion effect of the two extrusion rollers.

[0018] S2. The air pump delivers gas with a certain air pressure to the air delivery pipe, and then passes through the air delivery pipe and the outer cover to the air inlet pipe. The gas is delivered to the inside of the two branch pipes through the air delivery pipe, the outer cover and the air inlet pipe in turn. The gas is diverted and delivered to the built-in sleeves inside the two extrusion rollers through the two branch pipes and the ventilation grooves, and then flows to the air jet holes through multiple flow ports for ejection, so that the gas is ejected synchronously from the grooves on the two extrusion rollers, and the material particles are pushed out from the inside of the grooves by the ejected airflow;

[0019] S3. When extruding and granulating different materials, the joint plate is manually rotated, and the inner sleeve is driven to move inside the extrusion roller through the rotating threaded rod, so that the flow port and the jet hole on the inner sleeve are misaligned to different degrees, and then the flow area of ​​the jet hole is adjusted, so that the wind speed of the gas ejected from the groove can be conveniently and accurately adjusted, and the size of the airflow thrust can be adjusted;

[0020] S4. The material particles squeezed out from the extrusion roller are received by the screen plate, and the airflow transported by the air pipe drives the multiple blade plates to rotate, thereby driving the incomplete gear to rotate through the fixed sleeve and the connecting shaft, and the incomplete gear and the circular tooth plate cooperate to drive the sliding rod to slide back and forth, thereby driving the screen plate to move back and forth continuously, so that the material particles on the screen plate are continuously shaken, so that the material particles are turned over and evenly distributed for screening;

[0021] S5. Debris and unqualified material particles are screened and fall to the bottom of the built-in trough, and are collected by the set collection box. Qualified material particles automatically roll out through the lower end of the sieve plate.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Through the guiding effect of the stripping assembly, the gas is ejected synchronously from the grooves on the two extrusion rollers, and the ejected gas forms a certain thrust on the material particles inside the grooves, pushing the material particles out of the grooves, thereby achieving the effect of the two extrusion rollers synchronously assisting the stripping, so that the material particles are completely separated from the grooves on the surfaces of the two extrusion rollers, effectively improving the overall stripping effect, fully avoiding the problem of residual material particles, and improving the subsequent granulation quality;

[0024] 2. When extruding and granulating different materials, the outlet flow area of ​​the stripping component is adjusted by adjusting the component, so that the wind speed of the gas ejected from the inside of the groove can be adjusted conveniently and accurately, and the thrust of the airflow can be adjusted accordingly for different materials, so that a better stripping effect can be achieved for materials with different viscosity properties, effectively improving the overall stripping effect and saving energy;

[0025] 3. The self-screening component driven by the circulating gas is used to receive and screen the extruded material particles, quickly screen out the material particles of qualified size, automatically screen, and combine the extrusion granulation and screening materials into an integrated process, eliminating the process steps of transferring the material particles for separate screening, reducing the processing time, and effectively improving the overall processing efficiency. At the same time, the pneumatically driven self-screening component is used for screening, eliminating the need for an external drive source to drive the screening process, thereby reducing the cost of equipment use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0027] Figure 1 The overall structure of the present invention is three-dimensional Figure 1 ;

[0028] Figure 2 The overall structure of the present invention is three-dimensional Figure 2 ;

[0029] Figure 3 It is a schematic diagram of the partial structure of the self-screening component of the present invention;

[0030] Figure 4 It is a schematic diagram of the local structure of the regulating component of the present invention;

[0031] Figure 5 for Figure 4A magnified view of the structure at center;

[0032] Figure 6 It is a schematic diagram of the internal structure of the extrusion roller of the present invention;

[0033] Figure 7 for Figure 6 A magnified view of the structure at B in the middle;

[0034] Figure 8 for Figure 6 A magnified view of the structure at C in the middle;

[0035] Fig. 9 It is a schematic diagram of the local structure of the flow port of the present invention;

[0036] Fig.10 It is a schematic diagram of the internal structure of the outer casing of the present invention;

[0037] Fig.11 It is a schematic diagram of the partial structure of the self-screening component of the present invention.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] 1. Stripping assembly; 101. Jet hole; 102. Flow cavity; 103. Diverter pipe; 104. Ventilation groove; 105. Inlet pipe; 2. Adjustment assembly; 201. Built-in sleeve; 202. Flow port; 203. Threaded rod; 204. Connector plate; 205. Arc-shaped protrusion; 206. Nut sleeve; 207. Spring; 3. Self-screening assembly; 301. Screen plate; 302. Sliding rod; 303. Round shape Tooth plate; 304, incomplete gear; 305, baffle; 306, connecting shaft; 307, fixing sleeve; 308, blade plate; 309, air pipe; 310, outer cover shell; 311, support plate; 4, extrusion roller; 5, groove; 6, bracket plate; 7, transmission gear; 8, joint shaft; 9, driving gear; 10, motor; 11, air pump; 12, built-in groove; 13, collection box; 14, fuselage. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the embodiments.

[0041] See also Figure 1-11The present invention provides a double-roll extrusion granulator for plastic production, comprising a body 14, two symmetrically distributed support plates 6 are fixed on the top side of the body 14, two extrusion rollers 4 that cooperate with each other for extrusion granulation are arranged between the two support plates 6, a joint shaft 8 is fixed at the center position of the side of one end of the extrusion roller 4, the end of the joint shaft 8 away from the extrusion roller 4 rotates through the side wall of the support plate 6 and is fixed with a transmission gear 7, the transmission gears 7 on the two joint shafts 8 are meshed, a motor 10 is fixed on the outer side wall of the support plate 6, a driving gear 9 meshed with one of the transmission gears 7 is fixed on the output end of the motor 10, the other end of the extrusion roller 4 is rotatably connected to the other support plate 6, and the extrusion roller 4 is rotated to the other end of the support plate 6. A plurality of grooves 5 are arranged on the outer surface of the material roller 4 and are distributed at equal intervals. A stripping assembly 1 is arranged on the extrusion roller 4, and the particles are stripped from the grooves 5 by the stripping assembly 1, thereby assisting stripping. An adjusting assembly 2 is arranged inside the extrusion roller 4, and the stripping force of the stripping assembly 1 is adjusted according to different materials by the adjusting assembly 2. A self-screening assembly 3 is arranged below the extrusion roller 4 and cooperates with the stripping assembly 1 to automatically screen the material particles. An air pump 11 for conveying gas to the stripping assembly 1 is fixed on the outer wall of the fuselage 14. During the extrusion granulation process of the two extrusion rollers 4, the air pump 11 is started to work, and the air pump 11 inputs gas with a certain air pressure into the stripping assembly 1, and the stripping The guiding effect of component 1 causes the gas to be ejected synchronously from the grooves 5 on the two extrusion rollers 4, and the ejected gas forms a certain thrust on the material particles inside the grooves 5, pushing the material particles out from the inside of the grooves 5, thereby achieving the effect of the two extrusion rollers 4 simultaneously assisting in the material removal, so that the material particles are completely separated from the grooves 5 on the surfaces of the two extrusion rollers 4, effectively improving the overall material removal effect, fully avoiding the problem of residual material particles, and improving the subsequent granulation quality; when extruding and granulating different materials, the outlet flow area of ​​the stripping component 1 is adjusted by adjusting the component 2, so that the wind speed of the gas ejected from the inside of the groove 5 can be conveniently and accurately adjusted to adjust the size of the airflow thrust, Different materials will make adaptive adjustments to the airflow thrust, so that better stripping effects can be achieved for materials with different viscosity properties, effectively improving the overall stripping effect and overall practicality; the gas circulating in the stripping component 1 drives the self-screening component 3 to work, and the extruded material particles are received and screened by the self-screening component 3, and the material particles of qualified size are quickly screened out, and the screening is automatic, and the extrusion granulation and the screening materials are combined into an integrated process, eliminating the process steps of transferring the material particles for separate screening, reducing the processing time, and effectively improving the overall processing efficiency. At the same time, the pneumatically driven self-screening component 3 is used for screening processing, eliminating the external drive source to drive the screening process, and reducing the equipment use cost.

[0042] Further as Figure 2 , Figure 5 and Figure 6As shown, it is worth specifically explaining that the stripping assembly 1 includes an air jet hole 101 opened on the side of the extrusion roller 4 and located in the bottom of the groove 5, and the air jet hole 101 is provided with a plurality of them and the plurality of air jet holes 101 correspond to the groove 5. A joint shaft 8 rotatably connected to the bracket plate 6 is fixed at the center of one end of the extrusion roller 4, and a flow cavity 102 connected to the plurality of air jet holes 101 is opened inside the extrusion roller 4, and a ventilation groove 104 connected to the flow cavity 102 is opened in the joint shaft 8, and the ends of the two ventilation grooves 104 away from the flow cavity 102 are rotatably connected to the shunt pipe 103 through the bearing, and the two shunt pipes 103 are commonly connected to the air inlet pipe 105; when working, the air inlet pipe 105 is used to pass the air inlet pipe 105 to pass through the air inlet pipe 105. An air flow with a certain air pressure is synchronously transported to the inside of the two shunt pipes 103, and the gas is diverted and transported to the flow cavity 102 inside the two extrusion rollers 4 through the two shunt pipes 103 and the ventilation grooves 104, and then ejected through the jet holes 101, so that the gas is synchronously ejected from the grooves 5 on the two extrusion rollers 4, and a certain thrust is formed on the material particles inside the grooves 5 by the ejected air flow, and the material particles are pushed out from the inside of the grooves 5, thereby achieving the effect of synchronous auxiliary dematerialization of the two extrusion rollers 4, so that the material particles are completely separated from the grooves 5 on the surfaces of the two extrusion rollers 4, effectively improving the overall dematerialization effect, fully avoiding the problem of residual material particles, and improving the subsequent granulation quality.

[0043] Further as Figure 2 , Figure 6 , Figure 7 and Fig. 9 As shown, it is worth specifically explaining that the adjustment component 2 includes an inner sleeve 201 arranged inside the extrusion roller 4 and coaxially arranged with the extrusion roller 4, the outer wall of the inner sleeve 201 is tightly arranged with the inner wall of the extrusion roller 4, and a flow port 202 is opened on the side of the inner sleeve 201, and the flow port 202 is provided with a plurality of flow ports 202 and the plurality of flow ports 202 are arranged corresponding to the jet hole 101, and an air inlet connected to the ventilation groove 104 is opened at one end of the inner sleeve 201 close to the joint shaft 8; the gas in the ventilation groove 104 is transported to the inside of the inner sleeve 201 through the air inlet, and then passes through a plurality of flow ports 202 to pass through the inner sleeve 201. The gas flows through the opening 202 to the jet hole 101 for ejection. When different materials are extruded and granulated, the inner sleeve 201 is moved so that the flow opening 202 on the inner sleeve 201 and the jet hole 101 are misaligned to different degrees, thereby adjusting the flow area of ​​the jet hole 101, so that the wind speed of the gas ejected from the inside of the groove 5 can be conveniently adjusted, and the size of the airflow thrust can be adjusted. The airflow thrust is adaptively adjusted for different materials, so that a better stripping effect can be achieved for materials with different viscosity properties, effectively improving the overall stripping effect and overall practicality.

[0044] Further as Figure 4 , Figure 8 and Fig. 9As shown, it is worth explaining in detail that the end of the built-in sleeve 201 away from the joint shaft 8 is connected to the threaded rod 203 through a bearing, and a nut sleeve 206 threadably matched with the threaded rod 203 is fixed at the center position of the end of the extrusion roller 4 away from the joint shaft 8, and a joint plate 204 is fixed on the end of the threaded rod 203 located outside the extrusion roller 4, and a plurality of arc-shaped protrusions 205 distributed in a ring are fixed on the side of the joint plate 204; during specific operation, the joint plate 204 is manually rotated, and the joint plate 204 drives the threaded rod 203 to rotate in the nut sleeve 206, thereby driving the built-in sleeve 201 to move inside the extrusion roller 4 through the rotating threaded rod 203, and the displacement of the built-in sleeve 201 can be conveniently and relatively accurately adjusted by rotating the threaded rod 203, thereby adjusting the flow area of ​​the jet hole 101 and the wind speed, and the adjustment is convenient.

[0045] Further as Figure 2 , Figure 3 , Fig.10 and Fig.11As shown, it is worth explaining in detail that a built-in groove 12 is opened inside the fuselage 14, and the self-screening component 3 includes a screen plate 301 arranged at the bottom of the extrusion roller 4 and located in the built-in groove 12, one end of the screen plate 301 is fixed with a sliding rod 302, and the end of the sliding rod 302 away from the screen plate 301 slides through the side wall of the built-in groove 12 and is fixed with a circular tooth plate 303, a support plate 311 is fixed on the side of the bracket plate 6, and a connecting shaft 306 is rotatably connected to the support plate 311, and an incomplete gear 304 meshing with the circular tooth plate 303 is fixed on the end of the connecting shaft 306, a fixing sleeve 307 is fixed in the middle of the side of the connecting shaft 306, and a blade plate 308 is fixed on the side of the fixing sleeve 307, and the blade plate 308 is provided with multiple and multiple The blade plates 308 are distributed in a ring shape, and the connecting shaft 306 rotates and penetrates an outer cover shell 310 that is covered on the periphery of multiple blade plates 308. The connecting shaft 306 rotates and penetrates the outer cover shell 310, and the outer cover shell 310 is fixed to the outer side wall of the fuselage 14 through a connecting plate. The outer cover shell 310 is connected to an air supply pipe 309, and the end of the air supply pipe 309 away from the outer cover shell 310 is connected to the air pump 11, and the end of the air intake pipe 105 away from the shunt pipe 103 is connected to the inner part of the outer cover shell 310. The outer cover shell 310 is fixed to the ends of the air supply pipe 309 and the air intake pipe 105, and the air supply pipe 309 and the air intake pipe 105 are located on both sides of the outer cover shell 310. During specific operation, the material particles extruded from the extrusion roller 4 are collected by the sieve plate 301, and the air The pump 11 delivers gas with a certain air pressure into the air delivery pipe 309, and delivers it to the inside of the outer cover shell 310 through the air delivery pipe 309, so that the gas pushes the multiple blade plates 308 to drive the fixed sleeve 307 to rotate, and then drives the incomplete gear 304 to rotate through the fixed sleeve 307 and the connecting shaft 306. When the meshing teeth on the incomplete gear 304 rotate to mesh with the meshing teeth on one side of the circular tooth plate 303, it drives the circular tooth plate 303 to move in one direction. When the meshing teeth on the incomplete gear 304 rotate to mesh with the meshing teeth on the other side of the circular tooth plate 303, it drives the circular tooth plate 303 to move in the other direction, thereby driving the circular tooth plate 303 to reciprocate, and the sliding plate 303 drives the sliding plate 304 to rotate. The movable rod 302 slides back and forth, thereby driving the screen plate 301 to move back and forth continuously, so that the material particles on the screen plate 301 are continuously shaken, so that the material particles are turned over and evenly distributed, which makes it convenient for the screen plate 301 to screen the material particles. The debris and unqualified material particles are screened and fall into the bottom of the built-in groove 12, and the material particles of qualified size are quickly screened out. The automatic screening combines the extrusion granulation and the screening material into an integrated process, eliminating the process steps of transferring the material particles for separate screening, reducing the processing time, and effectively improving the overall processing efficiency. At the same time, the screen plate 301 is driven by the circulating gas to screen the material particles, eliminating the external drive source to drive the screening process, simplifying the overall structure, and reducing the equipment use cost.

[0046] Further as Fig.10 As shown, it is worth explaining in detail that the port of the air pipe 309 is aligned with the edge of the blade plate 308 away from the center of the connecting shaft 306; during specific operation, by aligning the port of the air pipe 309 with the edge of the blade plate 308 away from the center of the connecting shaft 306, the pushing effect of the airflow on the blade plate 308 is effectively increased.

[0047] This scheme has the following working process: when in use, the motor 10 drives the driving gear 9 to rotate, and the meshing cooperation of the driving gear 9 and the two transmission gears 7 drives the two extrusion rollers 4 to rotate in opposite directions, and the material falls between the two extrusion rollers 4, and through the extrusion effect of the two extrusion rollers 4, the material is squeezed into regular-shaped material particles through the grooves 5 on the surface of the extrusion rollers 4; in the process of extrusion granulation by the two extrusion rollers 4, the air pump 11 inputs an air flow with a certain air pressure into the air supply pipe 309, and the gas is successively transported to the inside of the two diversion pipes 103 through the air supply pipe 309, the outer cover shell 310 and the air inlet pipe 105, and the gas is diverted and transported to the inside of the built-in sleeve 201 inside the two extrusion rollers 4 through the two diversion pipes 103 and the ventilation groove 104, and then flows to the jet hole 101 through multiple flow ports 202 for ejection, so that The gas is synchronously ejected from the grooves 5 on the two extrusion rollers 4, and the ejected airflow forms a certain thrust on the material particles inside the grooves 5, pushing the material particles out from the inside of the grooves 5, thereby achieving the effect of the two extrusion rollers 4 synchronously assisting in removing the material. When extruding and granulating different materials, the joint plate 204 is manually rotated, and the joint plate 204 drives the threaded rod 203 to rotate in the nut sleeve 206, so that the inner sleeve 201 is driven to move inside the extrusion roller 4 by the rotating threaded rod 203. By moving the inner sleeve 201, the flow port 202 and the air jet hole 101 on the inner sleeve 201 are misaligned to different degrees, thereby adjusting the flow area of ​​the air jet hole 101, so that the wind speed of the gas ejected from the inside of the groove 5 can be conveniently and accurately adjusted, and the thrust of the airflow can be adjusted, and the thrust of the airflow removal can be adaptively adjusted for different materials.

[0048] The material particles squeezed out from the extrusion roller 4 are received by the sieve plate 301, and the air pump 11 delivers gas with a certain air pressure to the air pipe 309, and then delivers it to the inside of the outer cover shell 310 through the air pipe 309, so that the gas pushes multiple blade plates 308 to drive the fixed sleeve 307 to rotate, and then drives the incomplete gear 304 to rotate through the fixed sleeve 307 and the connecting shaft 306, and the incomplete gear 304 and the circular tooth plate 303 cooperate to drive the sliding rod 302 to slide back and forth, thereby driving the sieve plate 301 to move back and forth continuously, so that the material particles on the sieve plate 301 are continuously shaken, so that the material particles are turned over and evenly distributed, and the material particles are screened by the sieve plate 301, and the debris and unqualified material particles are screened and fall to the bottom of the built-in groove 12, so that the material particles of qualified size are quickly screened out.

[0049] Further as Figure 6 As shown, it is worth explaining in detail that a spring 207 is arranged between the outer wall of one end of the inner sleeve 201 close to the joint shaft 8 and the inner wall of the end of the extrusion roller 4, and the spring 207, the extrusion roller 4 and the inner sleeve 201 are arranged coaxially; during specific operation, the spring 207 is arranged to provide resistance to movement when the inner sleeve 201 is adjusted, so as to prevent excessive adjustment and assist precise adjustment.

[0050] Further as Figure 1 and Figure 2 As shown, it is worth explaining in detail that the sieve plate 301 is arranged as a whole at an angle inside the built-in groove 12, and the lower end of the sieve plate 301 extends out from the built-in groove 12; by arranging the sieve plate 301 at an angle, it is convenient for qualified material particles to automatically roll out through the lower end of the sieve plate 301.

[0051] Further as Figure 3 and Fig.11 As shown, it is worth explaining in detail that a baffle 305 is fixed on the top side of the sieve plate 301, and two baffles 305 are provided and the two baffles 305 are symmetrically distributed at both ends of the moving direction of the sieve plate 301; the two baffles 305 are provided to stop the material particles on the sieve plate 301 to prevent spillage.

[0052] Further as Figure 2 As shown, it is worth explaining in detail that a collecting box 13 is inserted into the bottom of the fuselage 14, and the collecting box 13 is located directly below the sieve plate 301. A handle is fixed on one end of the collecting box 13, and a rubber sleeve is fitted on the surface of the handle. The collecting box 13 is set to collect the debris and unqualified material particles at the sieve of the sieve plate 301 for easy processing.

[0053] A method for using a double-roll extrusion granulator comprises the following steps:

[0054] S1, the motor 10 drives the driving gear 9 to rotate, and the meshing cooperation between the driving gear 9 and the two transmission gears 7 drives the two extrusion rollers 4 to rotate in opposite directions, and the material falls between the two extrusion rollers 4. Through the extrusion effect of the two extrusion rollers 4, the material is squeezed into regular-shaped material particles through the grooves 5 on the surface of the extrusion rollers 4;

[0055] S2, the air pump 11 delivers gas with a certain air pressure to the air delivery pipe 309, and passes through the air delivery pipe 309 and the outer cover shell 310 to the air inlet pipe 105. The gas is sequentially delivered to the inside of the two shunt pipes 103 through the air delivery pipe 309, the outer cover shell 310 and the air inlet pipe 105, and the gas is diverted and delivered to the built-in sleeves 201 inside the two extrusion rollers 4 through the two shunt pipes 103 and the ventilation grooves 104, and then flows to the air injection holes 101 through multiple flow ports 202 for ejection, so that the gas is ejected synchronously from the grooves 5 on the two extrusion rollers 4, and the material particles are pushed out from the inside of the grooves 5 by the ejected airflow;

[0056] S3. When extruding and granulating different materials, the joint plate 204 is manually rotated, and the threaded rod 203 is rotated to drive the inner sleeve 201 to move inside the extrusion roller 4, so that the flow port 202 on the inner sleeve 201 and the air jet hole 101 are misaligned to different degrees, thereby adjusting the flow area of ​​the air jet hole 101, so that the wind speed of the gas ejected from the groove 5 can be conveniently and accurately adjusted, and the magnitude of the airflow thrust can be adjusted;

[0057] S4. The material particles squeezed out from the extrusion roller 4 are received by the screen plate 301, and the airflow delivered by the air pipe 309 drives the multiple blade plates 308 to rotate, thereby driving the incomplete gear 304 to rotate through the fixed sleeve 307 and the connecting shaft 306, and the incomplete gear 304 and the circular tooth plate 303 cooperate to drive the sliding rod 302 to slide back and forth, thereby driving the screen plate 301 to continuously reciprocate, so that the material particles on the screen plate 301 are continuously shaken, so that the material particles are turned over and evenly distributed for screening;

[0058] S5, the debris and unqualified material particles are screened and fall into the bottom of the built-in groove 12, and are collected by the set collection box 13, and the qualified material particles are automatically rolled out through the lower end of the screen plate 301.

[0059] In summary: through the guiding effect of the stripping component 1, the gas is synchronously ejected from the grooves 5 on the two extrusion rollers 4, and the ejected gas forms a certain thrust on the material particles inside the grooves 5, pushing the material particles out from the inside of the grooves 5, thereby achieving the effect of the two extrusion rollers 4 synchronously assisting in stripping, so that the material particles are completely separated from the grooves 5 on the surfaces of the two extrusion rollers 4, effectively improving the overall stripping effect, fully avoiding the problem of residual material particles, and improving the subsequent granulation quality; when extruding and granulating different materials, the outlet flow area of ​​the stripping component 1 is adjusted by adjusting the component 2, so that the wind speed of the gas ejected from the inside of the groove 5 can be conveniently and accurately adjusted to adjust the size of the airflow thrust , the airflow thrust is adaptively adjusted for different materials, so that a better stripping effect can be achieved for materials with different viscosity properties, effectively improving the overall stripping effect and overall practicality; the gas circulating in the stripping component 1 drives the self-screening component 3 to work, and the extruded material particles are received and screened by the self-screening component 3, and the material particles of qualified size are quickly screened out, and the screening is automatic, and the extrusion granulation and the screening material are combined into an integrated process, eliminating the process steps of transferring the material particles for separate screening, reducing the processing time, and effectively improving the overall processing efficiency. At the same time, the pneumatically driven self-screening component 3 is used for screening processing, eliminating the external drive source to drive the screening process, and reducing the equipment use cost.

[0060] The motor 10 and the air pump 11 can be purchased on the market. The motor 10 and the air pump 11 are equipped with a power supply, which is a mature technology in the art and has been fully disclosed, so they are not repeated in the specification.

Claims

1. A double-roll extrusion granulator for plastic production, comprising a machine body (14) and two support plates (6) fixed on the top of the machine body (14), characterized in that: Two extrusion rollers (4) for extrusion granulation are connected to the two support plates (6) for rotation. A plurality of grooves (5) are provided on the outer surface of the extrusion roller (4). The extrusion roller (4) is provided with a stripping assembly (1) for enabling particles to be separated from the grooves (5) for assisting stripping. The extrusion roller (4) is provided with an adjustment assembly (2) for adjusting the stripping force of the stripping assembly (1) for different materials. The stripping assembly (1) includes an air jet hole (101) corresponding to the groove (5) and provided at the bottom of the groove (5). ), a flow cavity (102) communicating with a plurality of air injection holes (101) is provided inside the extrusion roller (4), a joint shaft (8) is fixed at the center of one end of the extrusion roller (4), one end of the extrusion roller (4) is rotatably connected to the support plate (6) via the joint shaft (8), a ventilation groove (104) communicating with the flow cavity (102) is provided inside the joint shaft (8), two ports of the ventilation grooves (104) are rotatably connected with a shunt pipe (103), and the two shunt pipes (103) are commonly connected with an air inlet pipe (105); The regulating component (2) comprises an inner sleeve (201) arranged inside the extrusion roller (4) and slidingly fitting with the inner wall of the extrusion roller (4); the inner sleeve (201) is hollow inside and an air inlet communicating with the ventilation groove (104) is provided at one end of the inner sleeve (201) close to the joint shaft (8); and a plurality of flow openings (202) corresponding to the air injection holes (101) are provided on the side surface of the inner sleeve (201); A self-screening assembly (3) is arranged below the extrusion roller (4) and cooperates with the stripping assembly (1) to automatically screen the material particles. A built-in groove (12) is opened inside the body (14). The self-screening assembly (3) includes a screen plate (301) arranged at the bottom of the extrusion roller (4) and located in the built-in groove (12). A sliding rod (302) is fixed to one end of the screen plate (301). The end of the sliding rod (302) away from the screen plate (301) slides through the side wall of the built-in groove (12) and is fixed with a circular tooth plate (303). A support plate (311) is fixed on the side of the bracket plate (6). A connecting shaft (306) is rotatably connected to the support plate (311). An incomplete gear (304) meshingly connected to the circular toothed plate (303) is fixed at the end of the connecting shaft (306); a fixing sleeve (307) is fixed on the side of the connecting shaft (306); a plurality of blade plates (308) distributed in an annular shape are fixed on the side of the fixing sleeve (307); an outer cover (310) rotatably connected to the connecting shaft (306) is provided on the outer cover of the blade plates (308); the outer cover (310) is fixed to the outer wall of the fuselage (14) via a connecting plate; an air delivery pipe (309) is connected to the interior of the outer cover (310); and an end of the air inlet pipe (105) away from the shunt pipe (103) is connected to the interior of the outer cover (310).

2. The double-roll extrusion granulator for plastic production according to claim 1, characterized in that: A nut sleeve (206) is fixed to one end of the extrusion roller (4) away from the joint shaft (8); a threaded rod (203) is internally threadedly connected to the nut sleeve (206); one end of the threaded rod (203) located inside the extrusion roller (4) is rotatably connected to the built-in sleeve (201); and a joint plate (204) is fixed to the outer end of the threaded rod (203).

3. The double-roll extrusion granulator for plastic production according to claim 2, characterized in that: A spring (207) is provided between one end of the built-in sleeve (201) close to the joint shaft (8) and the end of the extrusion roller (4), and a plurality of arc-shaped protrusions (205) distributed in an annular shape are fixed to the side surface of the joint plate (204).

4. The double-roll extrusion granulator for plastic production according to claim 1, characterized in that: The port of the air delivery pipe (309) is aligned with the edge of the blade plate (308) away from the center of the connecting shaft (306).

5. The double-roll extrusion granulator for plastic production according to claim 4, characterized in that: The sieve plate (301) is arranged in an inclined manner, and the lower end of the sieve plate (301) protrudes from the inside of the built-in groove (12). Two baffle plates (305) are fixed on the top side of the sieve plate (301), and the two baffle plates (305) are symmetrically arranged at both ends of the sieve plate (301).

6. A method for using the double-roll extrusion granulator according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, the motor (10) drives the driving gear (9) to rotate, and the meshing of the driving gear (9) and the two transmission gears (7) drives the two extrusion rollers (4) to rotate in opposite directions, and the material falls between the two extrusion rollers (4). Through the extrusion effect of the two extrusion rollers (4), the material is squeezed through the grooves (5) on the surface of the extrusion rollers (4) to form material particles of regular shape; S2, the air pump (11) delivers gas with a certain air pressure into the air delivery pipe (309), and then passes the gas into the air inlet pipe (105) through the air delivery pipe (309) and the outer cover shell (310). The gas is delivered to the inside of the two branch pipes (103) in sequence through the air delivery pipe (309), the outer cover shell (310) and the air inlet pipe (105). The gas is diverted and delivered to the built-in sleeves (201) inside the two extrusion rollers (4) through the two branch pipes (103) and the ventilation groove (104). The gas then flows into the air injection holes (101) through the multiple flow ports (202) to be ejected, so that the gas is ejected synchronously from the grooves (5) on the two extrusion rollers (4), and the material particles are pushed out from the inside of the grooves (5) by the ejected airflow; S3. When extruding and granulating different materials, the joint plate (204) is manually rotated, and the threaded rod (203) is rotated to drive the inner sleeve (201) to move inside the extrusion roller (4), so that the flow opening (202) on the inner sleeve (201) and the air jet hole (101) are misaligned to different degrees, thereby adjusting the flow area of ​​the air jet hole (101), so that the wind speed of the gas ejected from the groove (5) can be conveniently and accurately adjusted, and the magnitude of the airflow thrust can be adjusted; S4, the material particles squeezed out from the extrusion roller (4) are received by the screen plate (301), and the airflow delivered by the air delivery pipe (309) drives the plurality of blade plates (308) to rotate, thereby driving the incomplete gear (304) to rotate through the fixed sleeve (307) and the connecting shaft (306), and the incomplete gear (304) and the circular tooth plate (303) cooperate to drive the sliding rod (302) to slide back and forth, thereby driving the screen plate (301) to continuously reciprocate, so that the material particles on the screen plate (301) are continuously shaken, so that the material particles are turned over and evenly distributed for screening; S5. Debris and unqualified material particles are screened and fall into the bottom of the built-in groove (12), and are collected by a set collection box (13). Qualified material particles automatically roll out through the lower end of the screen plate (301).

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