CN116922615A - Injection molding device for producing high-strength flame-retardant plastic particles - Google Patents

Abstract

The application relates to the technical field of plastic grain production equipment, in particular to an injection molding device for producing high-strength flame-retardant plastic grains, which comprises a frame, wherein the upper surface of the frame is fixedly connected with a main body, an injection molding assembly and a molding assembly are arranged in the main body, a power device is arranged on the outer side of the main body, a chopping assembly is arranged at the lower end of the molding assembly, the power device is in transmission connection with the chopping assembly through a transmission assembly, and the chopping assembly can chop raw materials subjected to melt molding into plastic grains in a bulge shape.

Description

An injection molding device for the production of high-strength flame-retardant plastic pellets

Technical field

The invention relates to the technical field of plastic pellet production equipment, and specifically relates to an injection molding device for the production of high-strength flame-retardant plastic pellets.

Background technique

Plastic is an indispensable material in people's lives. The production of plastic pellets is an important link in the recycling of waste plastics. Plastic pellets have a wide range of applications in daily life, clothing industry, building materials, chemical industry, agriculture, etc. Both the electrical appliance industry and the telecommunications industry are inseparable from plastic parts made of plastic particles.

The Chinese patent with patent number CN217573812U discloses an injection molding device for the production of plastic pellets, including a base plate, a mixing kettle, a mixing assembly, an extrusion piece, a mold one, a mold two and a hydraulic cylinder. The bottom wall of the mixing kettle is provided with legs. The stirring kettle is fixedly installed on the bottom plate with the help of legs. An electric heating jacket is set on the outside of the stirring kettle. A feed port is provided on the stirring kettle. A support frame is provided on the bottom plate. The extrusion part Set on the support frame, the extruded part is connected to the bottom wall of the stirring tank through a connecting pipe. A cut-off valve is provided on the connecting pipe. The mold is set on the extruded part, and the hydraulic cylinder is set on the bottom plate. On the top, the second mold is located at the top of the hydraulic cylinder, the second mold is arranged corresponding to the first mold, and the outer wall of the second mold is provided with a cooling water jacket.

The device has a simple structure. It uses the main stirring paddle to drive multiple sets of auxiliary stirring paddles to rotate synchronously, which can intensify the mixing degree of the injection liquid in the mixing tank and help the injection liquid to be evenly heated. At the same time, the injection liquid is heated evenly to avoid condensation. With the help of the extrusion part The injection liquid is squeezed into the closed space formed by the combination of mold one and mold two, and is cold-cut with the help of cooling water to process into an elongated structure for subsequent pelletizing.

At present, the plastic pellets produced by the above-mentioned plastic pellet production equipment are all strong and solid structures. In the process of using plastic pellets to produce plastic parts, it is necessary to melt the plastic pellets and then squeeze out the injection liquid through the use of an injection molding device. Condensation molding in and out of the mold. Therefore, the solid structure of the plastic particles not only increases the difficulty of melting during the heating process, but also increases the performance requirements for the injection molding device, especially for injection molded parts with high strength and good flame retardant properties. Due to the higher melting point of high-strength flame-retardant injection molding particles, it is more difficult to melt during the heating process, and the performance requirements for the injection molding device are also more stringent, which greatly increases the production cost.

Therefore, how to reduce the cost of using high-strength flame-retardant injection molding particles to make plastic parts is currently a problem that those skilled in the art need to solve.

Contents of the invention

In order to solve the shortcomings of the existing technology, the present invention provides an injection molding device for the production of high-strength flame-retardant plastic particles.

The technical solution of the present invention is:

The invention provides an injection molding device for the production of high-strength flame-retardant plastic granules, which includes a frame. The upper surface of the frame is fixedly connected to a main body. The interior of the main body is provided with an injection molding component. The upper surface of the main body is fixedly connected to a hopper. There is a power unit fixedly installed on the frame on the outside. The power unit is transmission connected with the injection molding component. There is a molding component connected with the injection molding component inside the main body. The lower end of the molding component is equipped with a cutting component. The power device and the cutting component Through the driving connection of the transmission assembly, the power unit drives the injection molding assembly to melt the raw materials inside the hopper and injects them into the molding assembly for molding. The power unit drives the cutting assembly through the transmission assembly to cut the melted and molded raw materials into bulging plastic pellets.

Further, the injection molding component includes a cavity, which is opened inside the main body. The hopper is sealed and connected with the inside of the cavity. The inside of the cavity is provided with a rotating body that is sealed and rotationally connected with it. The outer surface of the rotating body is opened. There is a trough that extends spirally toward one end of the trough. The starting end of the trough corresponds to the opening position connecting the hopper and the cavity. An installation cavity is provided inside the rotating body, and a heating rod is fixedly installed inside the installation cavity; The cavity is set in a conical shape, and the shape of the rotating body is designed to be conical corresponding to the shape of the cavity; the rotating body is made of copper alloy material with good structural strength and thermal conductivity.

Further, the left end of the rotating body is located at the opening of the installation cavity and has a spline hole. A spline shaft is installed inside the spline hole. An end cover is fixedly installed on the left end of the main body, and the spline shaft passes through it. It passes through the end cover plate and is rotationally connected to the end cover plate, and the output shaft of the power unit is drivingly connected to the spline shaft.

Further, the molding assembly includes a discharging cavity, which is opened inside the main body corresponding to the end of the rotating body. The discharging cavity is connected with the cavity. The lower surface of the discharging cavity is provided with a hole that penetrates to the bottom of the main body. There is a discharge hole on the outside of the discharge chamber. The upper end of the discharge chamber is provided with a trachea fixedly connected to it. The lower end of the trachea is inserted into the inside of the discharge hole. The outer surface of the trachea is sealed and fixedly connected to the side wall of the discharge chamber. The outer surface of the trachea is There is a gap between the surface and the side wall of the discharge hole. The interior of the main body is provided with a pneumatic component corresponding to the upper end of the trachea. The pneumatic component can controllably inject compressed gas into the interior of the trachea; the discharging hole and the discharging The connection between the cavities is provided with a smoothly transitioning arc surface.

Further, the pneumatic component includes a mounting hole, which is opened inside the main body corresponding to the upper end of the trachea. The inside of the mounting hole is in sealing and fixed communication with the upper end opening of the trachea, and the inside of the mounting hole is provided with a sealed and rotating connection therewith. The valve body has a channel inside that can communicate with the upper end opening of the trachea. The other end of the channel penetrates from the outside of the valve body near its upper end. The outside of the valve body near its upper end is equipped with a The air inlet ring seals the rotary connection. The air inlet ring is fixed and sealed at the upper end of the installation hole. The inner side of the air inlet ring is provided with an annular air inlet groove corresponding to the outer end of the channel. The outside of the air inlet ring is provided with an annular air inlet groove. The air groove is sealed and connected to an air inlet pipe, which is connected to an external air pump device, and the top of the valve body is provided with a rotating handwheel fixedly connected to it.

Further, the transmission assembly includes a driving pulley, which is fixedly installed on the output shaft of the power unit. The lower side of the frame is rotatably connected to a first driven shaft, and the outside of the first driven shaft is provided with a The driven pulley is fixedly connected to the driven pulley. The driven pulley and the driving pulley are connected through a transmission belt. The other end of the first driven shaft is provided with a first mounting seat that is rotationally connected to it. The first mounting seat is fixedly installed on the machine. On the lower side of the frame, the outside of the first driven shaft is fixedly connected to one end of the first mounting base. A driving gear is fixedly connected to the lower side of the frame near its right end. The second mounting base is fixedly connected to the first mounting base. A second driven shaft is rotatably connected to the bottom of the forming component, and a first driven gear fixedly connected to the second driven shaft is provided. The first driven gear meshes with the driving gear for transmission.

Further, the cutting assembly includes a pressure roller, which is fixedly installed on the outside of the second driven shaft between the second mounting seat and the first mounting seat. The surface of the pressure roller is fixedly installed along its radial direction. The chopping knives are evenly distributed, and a guide block is fixedly installed between the second mounting seat and the first mounting seat corresponding to the chopping knives on the pressure roller. The side of the guide block facing the pressure roller is provided with a smooth curved surface, and the surface of the curved surface is attached with A pad with certain elasticity.

Further, a water pump is fixedly installed on the rear lower part of the guide block. The end of the power input shaft of the water pump is provided with a third driven shaft that is transmission connected with it. The third driven shaft is rotationally connected with the first mounting seat. , there is a second driven gear fixedly connected to the outside of the third driven shaft near its left end. The second driven gear meshes with the driving gear for transmission. There is a water tank fixedly installed inside the frame below the guide block. , the inside of the water tank is filled with coolant, the opening of the water tank extends to the bottom of the pressure roller, the water inlet end of the water pump is equipped with a water inlet pipe fixedly connected to it, the other end of the water inlet pipe extends into the inside of the water tank, and the inside of the guide block A water flow channel is provided, and the outlet of the water flow channel extends to the curved surface on the side of the guide block. The water outlet end of the water pump is provided with an outlet pipe fixedly connected thereto, and the other end of the water outlet pipe is sealed and fixedly connected with the inlet of the water flow channel.

Further, the opening of the water tank is provided with a discharge plate fixedly installed on the frame. The discharge plate is provided with dense leak holes corresponding to the opening of the water tank. The discharge plate is arranged diagonally downward. The lower end extends to the outside of the rack.

Furthermore, the width d of the opening connecting the hopper and the cavity does not exceed the width D of the notch of the trough.

The beneficial effects achieved are:

The invention has a simple and ingenious structure, and is easy to use and operate. The plastic particles produced by the invention have a bulging hollow structure, which can not only reduce the wall thickness of the plastic particles themselves, making them easier to melt when making plastic parts, but also can Reducing the structural strength of the plastic particles themselves will help reduce the performance requirements for the molds used to make plastic parts, thereby reducing the production cost of using high-strength flame-retardant plastic particles to make high-strength flame-retardant plastic parts.

Description of the drawings

Figure 1 is a schematic diagram of the external structure of the present invention;

Figure 2 is a schematic diagram of the component exploded structure of the present invention;

Figure 3 is a schematic cross-sectional structural diagram along the A-A direction in Figure 1;

Figure 4 is an enlarged schematic diagram of the structure of Part I in Figure 3;

Figure 5 is an enlarged schematic diagram of the structure of Part II in Figure 3;

Fig. 6 is a schematic structural diagram of the B-B cross-section in Fig. 3 .

Detailed ways

In order to facilitate those skilled in the art to understand the present invention, the specific embodiments of the present invention will be described below with reference to the accompanying drawings.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations of the invention. Furthermore, the terms “first”, “second” and “third” are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that when a component is said to be "mounted on" another component, it can be directly on the other component or there may also be an intermediate component present. When a component is said to be "set on" another component, it can be directly set on the other component or there may be a centered component at the same time. When a component is said to be "anchored" to another component, it can be directly anchored to the other component or there may be an intermediate component present as well.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the invention belongs. The terminology used herein in the description of the invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in Figures 1-6, the present invention provides an injection molding device for the production of high-strength flame-retardant plastic pellets, including a frame 1. The upper surface of the frame 1 is provided with a main body 2 fixedly connected to it. The inside of the main body 2 There is a conical cavity 3, and the upper surface of the main body 2 is provided with a hopper 4 fixedly connected to it. The hopper 4 is sealed and connected with the inside of the cavity 3, and the inside of the cavity 3 is provided with a rotating body that is sealed and rotatably connected with it. 5. The rotating body 5 is made of materials with good structural strength and thermal conductivity, such as copper alloy and other metal materials. The shape of the rotating body 5 is designed to be conical corresponding to the shape of the cavity 3. The outer surface of the rotating body 5 is provided with openings. There is a trough 6 extending spirally toward one end thereof. The starting end of the trough 6 corresponds to the position of the opening connecting the hopper 4 and the cavity 3, and the width d of the opening connecting the hopper 4 and the cavity 3 does not exceed the trough. The notch width D of 6 (as shown in Figure 3), the inside of the rotating body 5 is provided with an installation cavity 7, and the heating rod 8 is fixedly installed inside the installation cavity 7; during the working process, the frame 1 can perform the heating on the main body 2 With stable installation and support, the raw materials used for making plastic pellets are put into the inside of the hopper 4, and then the rotating body 5 is driven to rotate, so that the raw materials inside the hopper 4 can be directed to the spiral trough 6 opened on the outer surface of the rotating body 5. It is transported end-to-end, and the cooperation between the conical rotating body 5 and the cavity 3 can squeeze and stir the raw materials when transporting the raw materials. At the same time, the heating rod 8 inside the installation cavity 7 will generate high temperature and follow the The rotation of the rotating body 5 can melt the raw materials more evenly.

As shown in Figures 2, 3, 4, and 5, the end of the cavity 3 corresponding to the rotating body 5 is provided with a discharging chamber 9 connected with the cavity 3. The lower surface of the discharging chamber 9 is provided with a discharging chamber 9 that penetrates to the lower side of the main body 2. The number of the external discharge holes 10 can be multiple. In this embodiment, there are two. The connection between the discharge holes 10 and the discharge cavity 9 is provided with a smoothly transitioning arc surface 11. The upper end of the cavity 9 is provided with a trachea 12 that is fixedly connected to it. The lower end of the trachea 12 is inserted into the inside of the discharge hole 10. The outer surface of the trachea 12 is sealed and fixedly connected to the side wall of the discharge cavity 9. The outer surface of the trachea 12 is connected to the discharge hole 10. There is a gap between the side walls of the discharge hole 10, and a mounting hole 13 is provided inside the main body 2 corresponding to the upper end of the air pipe 12. The bottom surface of the mounting hole 13 is flush with the upper end of the air pipe 12, and the inside of the mounting hole 13 is flush with the upper end of the air pipe 12. The upper end opening of 12 is sealed and fixedly connected. The inside of the mounting hole 13 is provided with a valve body 14 that is sealed and rotatably connected with it. The inside of the valve body 14 is provided with a channel 15 that can communicate with the upper end opening of the trachea 12. The other end of the channel 15 is from The outer side of the valve body 14 near its upper end penetrates through. The outer side of the valve body 14 near its upper end is provided with an air inlet ring 16 that is sealingly and rotationally connected with it. The air inlet ring 16 is fixedly and sealingly installed at the upper end of the mounting hole 13 The inner side of the air inlet ring 16 is provided with an annular air inlet groove 17 corresponding to the outer end of the channel 15. The outside of the air inlet ring 16 is provided with an air inlet pipe 18 that is sealed and fixedly connected with the annular air inlet groove 17. The air inlet pipe 18 is connected to the outside The air pump device is connected, and the top of the valve body 14 is provided with a rotating handwheel 19 fixedly connected to it; during the working process, the rotating body 5 will squeeze the melted raw material into the inside of the discharging chamber 9, and the discharging chamber 9 The molten raw material inside will enter the inside of the discharge hole 10 along the arc surface 11, and squeeze toward the outside of the lower side of the main body 2 in a tubular structure along the gap between the outer surface of the air pipe 12 and the side wall of the discharge hole 10. At the same time, open the external air pump device. The air pump device will input the compressed gas into the annular air inlet groove 17 inside the air inlet ring 16 through the air inlet pipe 18. The compressed gas in the annular air inlet groove 17 will pass through the valve body. 14, at this time, the valve body 14 is rotated by turning the hand wheel 19, so that the channel 15 inside the valve body 14 is connected with the upper end opening of the trachea 12, and the compressed gas in the passage 15 can be discharged through the trachea 12, and The compressed gas discharged from the air pipe 12 can ensure the stability of the tubular structure after the melted raw materials are discharged from the discharge hole 10, and this design can also adjust the pressure and discharge of the compressed gas discharged from the air pipe 12 by turning the handwheel 19 and the valve body 14. quantity.

As shown in Figures 1, 2, and 3, the left end of the rotating body 5 is located at the opening of the installation cavity 7 and has a spline hole 20. A spline shaft 21 is installed inside the spline hole 20, and the left end of the main body 2 is fixed. An end cover plate 22 is installed. The spline shaft 21 passes through the end cover plate 22 and is rotationally connected with the end cover plate 22. A power device 23 fixedly installed on the frame 1 is provided outside the left end of the main body 2. The power device 23 is preferably Using an electric motor, the output shaft of the power unit 23 is transmission connected with the spline shaft 21; during the working process, when the power unit 23 is started, the output shaft of the power unit 23 will drive the spline shaft 21 to rotate, and when the spline shaft 21 rotates, it will pass The spline hole 20 drives the rotating body 5 to rotate.

As shown in Figures 2, 3, and 6, the output shaft of the power unit 23 is provided with a driving pulley 24 fixedly connected to it. A bearing seat 25 is fixedly installed on the lower side of the frame 1. The inside of the bearing seat 25 is provided with a The outer side of the first driven shaft 26 is provided with a driven pulley 27 that is fixedly connected to the first driven shaft 26. The driven pulley 27 and the driving pulley 24 are drivingly connected through a transmission belt 28. The first driven shaft 26 is The other end of the driven shaft 26 is provided with a first mounting seat 29 that is rotatably connected to it. The first mounting seat 29 is fixedly mounted on the lower side of the frame 1. The outside of the first driven shaft 26 is close to the first mounting seat 29. A driving gear 30 is fixedly connected to one end. A second mounting base 31 is fixedly mounted on the lower side of the frame 1 near its right end. The second mounting base 31 and the first mounting base 29 are rotatably connected to the bottom of the discharge hole 10. The second driven shaft 32 is provided with a first driven gear 33 fixedly connected thereto. The first driven gear 33 meshes with the driving gear 30 for transmission. The outside of the second driven shaft 32 is located on the second driven shaft 32 . A pressure roller 34 is fixedly connected between the second installation base 31 and the first installation base 29. The surface of the pressure roller 34 is fixedly equipped with evenly distributed chopping knives 35 along its radial direction. A guide block 36 is fixedly installed corresponding to the chopping knife 35 on the pressure roller 34. The guide block 36 is provided with a smooth curved surface 37 on the side facing the pressure roller 34, and a backing plate 38 with a certain elasticity is attached to the surface of the curved surface 37; During the working process, when the power unit 23 is started, while the power unit 23 drives the rotating body 5 to rotate, the driving pulley 24 will rotate synchronously with the output shaft of the power unit 23, and the driving pulley 24 will drive the driven belt through the transmission belt 28. The wheel 27 and the first driven shaft 26 rotate synchronously. The first driven shaft 26 drives the second driven shaft 32 to rotate through the driving gear 30 and the first driven gear 33, and the second driven shaft 32 rotates. The rotating pressure roller 34 and the chopping knife 35 are driven to rotate. When the melted raw material is discharged from the discharge hole 10 in a tubular structure, the discharged melted raw material will move toward the pressure roller 34 along the curved surface 37 on one side of the guide block 36 Sliding with the chopping knife 35, the chopping knife 35 cooperates with the backing plate 38 during the rotation process to cut the melted tubular structure of the raw material into pieces. During the cutting process, the chopping knife 35 will first cut the tubular structure. The lower end of the raw material is closed. The compressed gas input through the air pipe 12 will blow the tubular structure when the chopping knife 35 cuts the raw material in a tubular structure. Then, as the pressure roller 34 rotates, the next chopping knife 35 will cut the tubular structure. The upper end of the raw material is closed. Therefore, when the tubular raw material is cut into segments, a bulge containing gas will be formed in the center of the particle. The bulge-shaped plastic particle can not only reduce the wall thickness of the plastic particle itself, making it easier to use when making plastic parts. It can be melted more easily, and can also reduce the structural strength of the plastic particles themselves, which is beneficial to reducing the performance requirements of the molds for making plastic parts, thereby reducing the production cost of using high-strength flame-retardant plastic particles to make high-strength flame-retardant plastic parts.

As shown in Figures 2, 3, and 6, a water pump 39 is fixedly installed on the rear lower part of the guide block 36. The end of the power input shaft of the water pump 39 is provided with a third driven shaft 40 that is transmission connected with it. The shaft 40 is rotationally connected to the first mounting base 29. A second driven gear 41 is fixedly connected to the outside of the third driven shaft 40 near its left end. The second driven gear 41 meshes with the driving gear 30 for transmission. There is a water tank 42 fixedly installed inside the frame 1 below the guide block 36. The inside of the water tank 42 is filled with coolant. The opening of the water tank 42 extends to directly below the pressure roller 34. The water inlet end of the water pump 39 is provided with a cooling liquid. The other end of the water inlet pipe 43 extends into the inside of the water tank 42. A water flow channel 44 is provided inside the guide block 36. The outlet of the water flow channel 44 extends to the curved surface 37 on the side of the guide block 36. The water pump 39 The water outlet end is provided with a water outlet pipe 45 fixedly connected thereto, and the other end of the water outlet pipe 45 is sealed and fixedly connected with the inlet of the water flow channel 44; during the working process, when the power device 23 is started, the first driven shaft 26 passes through the driving gear. 30 and the second driven gear 41 will drive the third driven shaft 40 to rotate, and the third driven shaft 40 will drive the water pump 39 to work. The water pump 39 will pump the coolant inside the water tank 42 to the water flow through the water inlet pipe 43. In the channel 44, the cooling liquid in the water channel 44 will flow downward from the curved surface 37 on the side of the guide block 36, thereby cooling the melted raw material passing through the curved surface 37, and accompanied by the cut off bulge-shaped plastic particles. Falling toward the opening of the water tank 42, the coolant will return to the inside of the water tank 42 again. This design cleverly realizes the driving of the water pump through a simple structure, thereby promoting the cooling effect of the melted raw materials, which is beneficial to improve Condensation efficiency in plastic pellet production.

As shown in Figures 2 and 6, the opening of the water tank 42 is provided with a discharge plate 46 fixedly installed on the frame 1. The discharge plate 46 is provided with dense leak holes 47 corresponding to the opening of the water tank. The discharge plate 46 is inclined Set downward, the lower end of the discharge plate 46 extends to the outside of the frame 1; during operation, when the coolant falls toward the opening of the water tank 42 along with the cut off bulging plastic particles, the coolant and the bulging plastic particles The plastic pellets will fall on the discharge plate 46, the cooling liquid will leak into the opening of the water tank 42 through the leak hole 47 on the discharge plate 46, and the bulging plastic pellets will pass through the discharging hole 47 set obliquely downward. The plate 46 slides down to the outside of the frame 1. At this time, a special storage tool can be used to conveniently collect the bulging plastic particles.

In summary, the structure of the present invention is simple and ingenious, and is easy to use and operate. Moreover, the plastic pellets produced by the present invention have a bulging hollow structure, which can not only reduce the wall thickness of the plastic pellets themselves, but also make it easier to produce plastic parts. Being melted can also reduce the structural strength of the plastic particles themselves, which will help reduce the performance requirements for molds for making plastic parts, thereby reducing the production cost of using high-strength flame-retardant plastic particles to make high-strength flame-retardant plastic parts.

The above-described embodiments of the present invention do not limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims (10)

1. Injection molding device is used in production of high strength fire-retardant plastic grain, its characterized in that: including frame (1), the upper surface fixedly connected with main part (2) of frame (1), the inside of main part (2) is equipped with injection molding assembly, the upper surface fixedly connected with hopper (4) of main part (2), the outside of main part (2) is equipped with power device (23) of fixed mounting on frame (1), power device (23) are connected with the subassembly transmission of moulding plastics, the inside of main part (2) is equipped with the shaping subassembly with injection molding assembly intercommunication, the lower extreme of shaping subassembly is equipped with the cutting assembly, power device (23) are connected through the transmission of transmission assembly with the cutting assembly, power device (23) drive injection molding assembly can melt the inside raw and other materials of hopper (4) and inject into in the shaping subassembly and take shape, power device (23) can drive the cutting assembly through the transmission assembly and will melt the shaping raw and other materials and cut into the plastic granule of swell form.

2. The injection molding device for producing high-strength flame-retardant plastic granules according to claim 1, wherein: the injection molding assembly comprises a cavity (3), the cavity (3) is formed in the main body (2), the hopper (4) is communicated with the inside of the cavity (3) in a sealing way, a rotating body (5) connected with the cavity (3) in a sealing way is arranged in the cavity, a trough (6) extending spirally towards one end of the rotating body (5) is formed in the outer surface of the rotating body, the starting end of the trough (6) corresponds to the opening position of the hopper (4) communicated with the cavity (3), an installation cavity (7) is formed in the rotating body (5), and a heating rod (8) is fixedly installed in the installation cavity (7); the cavity (3) is conical, and the shape of the rotator (5) is designed to be conical corresponding to the shape of the cavity (3); the rotor (5) is made of copper alloy materials with good structural strength and heat conduction performance.

3. The injection molding device for producing high-strength flame-retardant plastic granules according to claim 2, wherein: the left end part of the rotating body (5) is positioned at the opening of the mounting cavity (7) and provided with a spline hole (20), a spline shaft (21) is mounted in the spline hole (20) in a matched mode, an end cover plate (22) is fixedly mounted at the left end part of the main body (2), the spline shaft (21) penetrates through the end cover plate (22) and is rotationally connected with the end cover plate (22), and an output shaft of the power device (23) is in transmission connection with the spline shaft (21).

4. The injection molding device for producing high-strength flame-retardant plastic granules according to claim 2, wherein: the forming assembly comprises a discharging cavity (9), the discharging cavity (9) is arranged at the position, corresponding to the inner end part of the rotating body (5), of the main body (2), the discharging cavity (9) is communicated with the cavity (3), a discharging hole (10) penetrating through the lower side of the main body (2) is formed in the lower surface of the discharging cavity (9), an air pipe (12) fixedly connected with the discharging cavity is arranged at the upper end of the discharging cavity (9), the lower end of the air pipe (12) is correspondingly inserted into the discharging hole (10), the outer surface of the air pipe (12) is fixedly connected with the side wall of the discharging cavity (9) in a sealing manner, a gap is reserved between the outer surface of the air pipe (12) and the side wall of the discharging hole (10), an air pressure assembly is arranged at the upper end part, corresponding to the air pipe (12), of the inner part of the main body (2), and the air pressure assembly can be used for injecting compressed air into the air pipe (12) in a controllable manner; the joint of the discharging hole (10) and the discharging cavity (9) is provided with a circular arc surface (11) in smooth transition.

5. The injection molding device for producing high-strength flame-retardant plastic granules according to claim 4, wherein: the air pressure assembly comprises a mounting hole (13), the mounting hole (13) is formed in the inner portion of the main body (2) and corresponds to the upper end portion of the air pipe (12), the inner portion of the mounting hole (13) is fixedly communicated with the upper end opening of the air pipe (12) in a sealing mode, a valve body (14) which is fixedly connected with the mounting hole in a sealing mode is arranged in the mounting hole (13), a channel (15) which can be communicated with the upper end opening of the air pipe (12) is formed in the valve body (14) in a sleeved mode, the other end of the channel (15) penetrates through the position, close to the upper end, of the outer side of the valve body (14), an air inlet ring (16) which is fixedly connected with the valve body in a sealing mode is arranged at the position, close to the upper end of the outer side of the valve body (14), the air inlet ring (16) is fixedly arranged at the upper end of the mounting hole (13), an annular air inlet groove (17) is formed in the outer end of the inner side of the air inlet ring (16), an air inlet pipe (18) which is fixedly communicated with the annular air inlet groove (17) in a sealing mode, the outer side of the air inlet pipe (18) is connected with an air pump device, and a hand wheel (19) which is fixedly connected with the top of the valve body (14).

6. The injection molding device for producing high-strength flame-retardant plastic granules according to claim 1, wherein: the transmission assembly comprises a driving belt wheel (24), the driving belt wheel (24) is fixedly arranged on an output shaft of the power device (23), a first driven shaft (26) is rotationally connected to the lower side face of the frame (1), a driven belt wheel (27) fixedly connected with the first driven shaft (26) is arranged on the outer side of the driven belt wheel, the driven belt wheel (27) is in transmission connection with the driving belt wheel (24) through a transmission belt (28), a first mounting seat (29) which is rotationally connected with the driven belt wheel (26) is arranged on the other end of the driven belt wheel, the first mounting seat (29) is fixedly arranged on the lower side face of the frame (1), a driving gear (30) is fixedly connected to one end, which is close to the first mounting seat (29), of the outer side face of the frame (1), a second mounting seat (31) is fixedly connected to the right end of the lower side face of the frame (1), a second driven shaft (32) is rotationally connected to the lower side of the forming assembly, a first driven gear (33) which is fixedly connected with the second driven shaft (32), and the first driven gear (33) is meshed with the driving gear (30).

7. The injection molding device for producing high-strength flame-retardant plastic granules according to claim 6, wherein: the chopping assembly comprises a pressing roller (34), the pressing roller (34) is fixedly arranged at the outer side of a second driven shaft (32) and located at a position between a second installation seat (31) and a first installation seat (29), uniformly distributed chopping knives (35) are fixedly arranged on the surface of the pressing roller (34) along the radial direction of the pressing roller, guide blocks (36) are fixedly arranged on the surfaces, corresponding to the chopping knives (35) on the pressing roller (34), of the second installation seat (31) and the first installation seat (29), smooth curved surfaces (37) are arranged on one sides, facing the pressing roller (34), of the guide blocks (36), and backing plates (38) with certain elasticity are attached to the surfaces of the curved surfaces (37).

8. The injection molding device for producing high-strength flame-retardant plastic granules according to claim 7, wherein: the rear lower part of the guide block (36) fixedly provided with a water pump (39), the end part of a power input shaft of the water pump (39) is provided with a third driven shaft (40) which is in transmission connection with the water pump, the third driven shaft (40) is rotationally connected with the first mounting seat (29), the position, close to the left end, of the outer side of the third driven shaft (40) is provided with a second driven gear (41) which is fixedly connected with the third driven shaft, the second driven gear (41) is in meshed transmission with the driving gear (30), the lower part of the guide block (36) is provided with a water tank (42) fixedly arranged in the frame (1), the inside of the water tank (42) is provided with cooling liquid, an opening of the water tank (42) extends to the lower part which is opposite to the press roller (34), the water inlet end of the water pump (39) is provided with a water inlet pipe (43) which is fixedly connected with the water inlet pipe, the other end of the water inlet pipe (43) extends into the water tank (42), the outlet of the water flow channel (44) extends to a curved surface (37) on the side of the guide block (36), the water outlet end of the water flow channel (44) is provided with a water outlet end of the water outlet pipe (45) which is fixedly connected with the water outlet pipe (45), and the water outlet pipe (45) is fixedly communicated with the water outlet pipe (45).

9. The injection molding device for producing high-strength flame-retardant plastic granules according to claim 8, wherein: the opening part of the water tank (42) is provided with a discharge plate (46) fixedly arranged on the frame (1), the opening part of the discharge plate (46) corresponding to the water tank is provided with densely distributed leakage holes (47), the discharge plate (46) is obliquely downwards arranged, and the lower end of the discharge plate (46) extends to the outside of the frame (1).

10. The injection molding device for producing high-strength flame-retardant plastic granules according to claim 2, wherein: the width D of the opening communicated with the hopper (4) and the cavity (3) is not more than the width D of the notch of the trough (6).