Preparation device and method of modified flame-retardant PP particles for household appliance shell

Abstract

The application discloses a kind of preparation device and preparation method of modified flame-retardant PP particles for household appliance shell, applied in the technical field of flame-retardant PP particle preparation, the present application is prepared by setting conveying mechanism, temporary storage component can temporarily store PP raw materials, and it is convenient to transport PP particles, preheating component can be connected with PP raw material conveying equipment, and PP raw materials can be preheated, and it is convenient to process PP raw materials, discharging assembly can guide and transport PP particles, it is convenient to transport PP particles, buffer component can block and buffer the PP particles driven by air, improve the quality of PP particles, by setting preparation mechanism, discharging assembly can uniformly discharge PP raw materials, it is convenient for cutting assembly to cut uniformly, feeding assembly can uniformly transport PP raw materials, and the rotational speed of cutting assembly can be consistent with the rotational speed of feeding assembly, cutting assembly can cut and granulate PP raw materials.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of preparing flame-retardant PP particles, and particularly relates to a preparation device and method of modified flame-retardant PP particles for household appliance shells. BACKGROUND

[0002] PP is the abbreviation of polypropylene, which is a polymer formed by the addition polymerization of propylene. It is a white waxy material that is transparent and light in appearance. Modified flame-retardant PP is a PP material with flame-retardant effect, which is generally used to make household appliance shells. For its preparation, the raw materials are heated, extruded and cut into particles for the convenience of storage and use of the PP material.

[0003] At present, a Chinese invention with the publication number CN111533996A discloses a modified flame-retardant PP particle for household appliance shells and a preparation method thereof. The modified flame-retardant PP particle for household appliance shells is made of the following raw materials by weight: 70-90 parts of PP resin, 5-15 parts of high flame-retardant composite filler, 3-5 parts of toughening agent, 2-3 parts of pentaerythritol, 6-10 parts of ammonium polyphosphate, and 1-2 parts of lubricant. The invention also discloses a preparation method of the modified flame-retardant PP particle for household appliance shells. The high flame-retardant composite filler can release water vapor and metal oxide when burning. The water vapor can reduce the concentration of the burning material, and the metal oxide has excellent heat resistance and is coated on the surface of the burning material, further enhancing the flame-retardant performance. Therefore, the prepared composite filler has excellent flame-retardant performance, which can further endow the PP particle with excellent flame-retardant performance.

[0004] The existing preparation device and method of modified flame-retardant PP particles for household appliance shells have the following shortcomings when preparing PP particles:

[0005] 1. The PP raw materials cannot be preheated, which reduces the processing efficiency of the PP raw materials.

[0006] 2. The uniformity structure of the PP raw material granulation is lacking, which cannot guarantee the uniformity of the particle size. SUMMARY

[0007] The purpose of the present application is to overcome the shortcomings of the existing preparation device and method of modified flame-retardant PP particles for household appliance shells.

[0008] 1. The PP raw materials can be preheated, which improves the processing efficiency of the PP raw materials.

[0009] 2. The uniformity structure of the PP raw material granulation can guarantee the uniformity of the particle size.

[0010] The above technical purpose of the present application is achieved by the following technical scheme: a preparation device of modified flame-retardant PP particles for household appliance shell, comprising a conveying mechanism and a preparation mechanism, the preparation mechanism is bolted to the inner wall of the conveying mechanism, the conveying mechanism comprises a temporary storage assembly, a preheating assembly, a discharging assembly and a buffer assembly, the preheating assembly is communicated at the top of the temporary storage assembly, the discharging assembly is communicated at the front side of the temporary storage assembly, the buffer assembly is bolted to the surface of the discharging assembly, the preparation mechanism comprises a discharging assembly, a feeding assembly, a cutting assembly and a pushing assembly, the discharging assembly is communicated at the inner wall of the preheating assembly, the feeding assembly is bolted to the rear side of the discharging assembly, the cutting assembly is bolted to the front side of the feeding assembly, the inner wall of the cutting assembly is slidingly connected with the surface of the discharging assembly, and the pushing assembly is communicated at the rear side of the temporary storage assembly.

[0011] By adopting the above technical scheme, the conveying mechanism can preheat and convey the PP raw materials, and the preparation mechanism can rapidly and uniformly granulate the PP raw materials, thereby improving the preparation efficiency of the PP raw material particles.

[0012] The present application further provides that the temporary storage assembly comprises a support main pipe, a rear connecting pipe and a front connecting pipe, the rear side of the support main pipe is communicated with the rear connecting pipe, and the front side of the support main pipe is communicated with the front connecting pipe.

[0013] By adopting the above technical scheme, the temporary storage assembly is provided, the support main pipe can support and limit the rear connecting pipe and the front connecting pipe, support and limit the preheating assembly, temporarily store and convey the PP particles after granulation, the rear connecting pipe can be connected with the preparation mechanism and facilitate the preparation mechanism to convey air, and the front connecting pipe can be connected with and limit the discharging assembly.

[0014] The present application further provides that the preheating assembly comprises a conveying pipe, a feeding pipe and a preheating heater, the feeding pipe is communicated at the top of the conveying pipe, and the preheating heater is bolted to the top of the surface of the feeding pipe.

[0015] By adopting the above technical scheme, the preheating assembly is provided, the conveying pipe can support and limit the feeding pipe and temporarily store the PP raw materials, the feeding pipe can be connected with a PP raw material conveying device and convey the PP raw material conveying device into the conveying pipe, and after being powered on and started, the electrical energy can be converted into heat energy, which is then transmitted to the PP raw materials to preheat the PP raw materials.

[0016] The present application further provides that the discharging assembly comprises a discharging elbow, a material collecting hopper and a discharging port, the discharging elbow is communicated at the front side of the support main pipe, the material collecting hopper is communicated at the bottom of the discharging elbow, and the discharging port is formed at the bottom of the material collecting hopper.

[0017] The technical scheme is adopted, the discharge elbow can guide and convey the PP particles completed granulation through the setting of the discharge assembly, the receiving hopper can guide the PP particles to the discharge port, and the PP particles can be discharged from the discharge port.

[0018] The application further provides that the buffer assembly comprises an air outlet, a blocking net and a gauze cotton plate, the air outlet is arranged on the surface of the discharge elbow, the blocking net is bolted to the inner wall of the air outlet, and the gauze cotton plate is bolted to the inner wall of the blocking net.

[0019] The technical scheme is adopted, the buffer assembly is arranged, the flowing air can be discharged from the air outlet, the PP particles can be blocked by the blocking net, and the gauze cotton plate is made of sponge material and has softness to buffer the PP particles.

[0020] The application further provides that the discharge assembly comprises a storage cylinder, a feeding port and a discharge port, the storage cylinder is communicated with the bottom of the conveying pipe, the feeding port is arranged on the top of the storage cylinder, and the discharge port is arranged on the surface of the storage cylinder.

[0021] The technical scheme is adopted, the discharge assembly is arranged, the PP raw materials can be temporarily stored in the storage cylinder, the feeding assembly can be conveniently conveyed, the PP raw materials can enter the storage cylinder through the feeding port, and the PP materials can be cut into particles by cooperating the discharge port with the cutting assembly.

[0022] The application further provides that the feeding assembly comprises a servo motor, a spiral blade and a hollow heat pipe, the servo motor is bolted to the back side of the storage cylinder, the hollow heat pipe is bolted to the output end of the front side of the servo motor, and the spiral blade is communicated with the surface of the hollow heat pipe.

[0023] The technical scheme is adopted, the servo motor can convert the electric energy into mechanical energy after being powered on and started, and then the mechanical energy is transmitted to the hollow heat pipe, the hollow heat pipe can cooperate with the cutting assembly to heat the PP raw materials, the spiral blade rotates with the hollow heat pipe to convey and extrude the PP raw materials, and the PP raw materials can be discharged from the discharge port.

[0024] The application further provides that the cutting assembly comprises a heat preservation heater, a heat conduction rod and a spiral cutting knife, the heat conduction rod is bolted to the inner wall of the hollow heat pipe, the heat preservation heater is bolted to the front side of the heat conduction rod, the spiral cutting knife is bolted to the surface of the heat preservation heater, and the inner wall of the spiral cutting knife is in contact with the surface of the storage cylinder.

[0025] By adopting the technical scheme, the heat preservation heater can convert electric energy into heat energy after being powered on and started, and then transmit the heat energy to the heat conduction rod, the heat conduction rod can transmit the heat energy to the hollow heat conduction pipe, and the hollow heat conduction pipe can rotate the heat preservation heater, the spiral cutting knife can rotate on the surface of the storage cylinder at the same speed as the operation speed of the servo motor, so that the PP raw material discharged from the discharge port can be uniformly cut.

[0026] The application further provides that the pushing assembly comprises a air supply pipe, a dust screen and an electric fan, the air supply pipe is communicated with the rear side of the supporting main pipe, the dust screen is bolted to the rear side of the air supply pipe, and the electric fan is bolted to the rear side of the air supply pipe.

[0027] By adopting the technical scheme, the air supply pipe can support and limit the electric fan, the electric fan can suck air from the outside to the air supply pipe after being powered on and started, and the dust screen can block impurities and dust in the air.

[0028] A preparation method of modified flame-retardant PP particles for household appliance shells, comprising the following steps:

[0029] S1. Preheating and conveying: first, the feeding pipe is connected with a modified flame-retardant PP raw material conveying device, the preheating heater is powered on and started, the preheating heater preheats the modified flame-retardant PP raw material, then the preheated modified flame-retardant PP raw material is conveyed to the preparation mechanism for processing, after the modified flame-retardant PP particles are prepared in the preparation mechanism, the modified flame-retardant PP particles are conveyed to the discharge elbow, and are blocked by the net cotton board and the blocking net, and finally enter the discharge port for discharge.

[0030] S2. Discharging and cooling: first, the servo motor and the heat preservation heater are powered on and started when the modified flame-retardant PP raw material enters the storage cylinder, the heat preservation heater transmits heat to the heat conduction rod and the hollow heat conduction pipe, the servo motor rotates the hollow heat conduction pipe and the heat conduction pipe, so that the spiral blade pushes the modified flame-retardant PP raw material with the rotation of the hollow heat conduction pipe, the spiral cutting knife rotates on the surface of the storage cylinder with the rotation of the heat conduction rod, the modified flame-retardant PP raw material is discharged from the discharge port and contacted with the spiral cutting knife due to the extrusion of the spiral blade, and is cut into particles by the spiral cutting knife, then the electric fan is powered on and started, the electric fan blows air onto the modified flame-retardant PP particles, so as to blow and cool the modified flame-retardant PP particles.

[0031] In summary, the application has the following beneficial effects:

[0032] 1. By setting up a conveying mechanism, the temporary storage component can temporarily store PP raw materials and facilitate the conveying of PP granules. The preheating component can be connected to external PP raw material conveying equipment and can preheat the PP raw materials to facilitate the processing of PP raw materials. The discharge component can guide and convey PP granules to facilitate the conveying of PP granules. The buffer component can block and buffer PP granules carried by air to improve the quality of PP granules.

[0033] 2. By setting up a preparation mechanism, the discharge component can evenly discharge PP raw materials, which facilitates the cutting component to cut them evenly. The feeding component can evenly convey the PP raw materials and make the rotation speed of the cutting component consistent with that of the feeding component. The cutting component can cut and granulate the PP raw materials evenly. The pushing component can use air to transport the PP granules and cool them. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the conveying mechanism structure of the present invention;

[0036] Figure 3 This is a schematic diagram of the temporary storage component structure of the present invention;

[0037] Figure 4 This is a schematic diagram of the preheating component structure of the present invention;

[0038] Figure 5 This is a schematic diagram of the structure of the discharge component and buffer component of the present invention;

[0039] Figure 6 This is a schematic diagram of the preparation mechanism of the present invention;

[0040] Figure 7 This is a schematic diagram of the material discharge assembly structure of the present invention;

[0041] Figure 8 This is a schematic diagram of the feeding component structure of the present invention;

[0042] Figure 9 This is a schematic diagram of the cutting component structure of the present invention;

[0043] Figure 10 This is a schematic diagram of the push component structure of the present invention;

[0044] Figure 11 This is a diagram illustrating the preparation method of the present invention.

[0045] : 1, conveying mechanism; 101, temporary storage assembly; 1011, support main pipe; 1012, rear connecting pipe; 1013, front connecting pipe; 102, preheating assembly; 1021, conveying pipe; 1022, feeding pipe; 1023, preheating heater; 103, discharging assembly; 1031, discharging elbow; 1032, receiving hopper; 1033, discharging port; 104, buffering assembly; 1041, air outlet; 1042, blocking net; 1043, net cotton board; 2, preparation mechanism; 201, discharging assembly; 2011, storage cylinder; 2012, feeding port; 2013, discharging port; 202, feeding assembly; 2021, servo motor; 2022, spiral blade; 2023, hollow heat conduction pipe; 203, cutting assembly; 2031, heat preservation heater; 2032, heat conduction rod; 2033, spiral cutting knife; 204, pushing assembly; 2041, air supply pipe; 2042, dust blocking net; 2043, electric fan. DETAILED DESCRIPTION

[0046] The application will be further described below in conjunction with the drawings.

[0047] Example 1

[0048] Reference Figures 1-5 A kind of preparation device of modified flame-retardant PP particles for household appliance shell, including conveying mechanism 1, conveying mechanism 1 includes temporary storage assembly 101, preheating assembly 102, discharging assembly 103 and buffering assembly 104, preheating assembly 102 is communicated at the top of temporary storage assembly 101, discharging assembly 103 is communicated at the front side of temporary storage assembly 101, buffering assembly 104 is bolted on the surface of discharging assembly 103, by setting conveying mechanism 1, temporary storage assembly 101 can temporarily store PP raw materials, and it is convenient to transport PP particles, preheating assembly 102 can be connected with PP raw material conveying equipment, and PP raw materials can be preheated, facilitate the processing of PP raw materials, discharging assembly 103 can guide and transport PP particles, facilitate the transport of PP particles, buffering assembly 104 can block and buffer the PP particles driven by air, improve the quality of PP particles.

[0049] As Figure 3As shown, the temporary storage assembly 101 comprises a support main pipe 1011, a rear connecting pipe 1012 and a front connecting pipe 1013, the rear side of the support main pipe 1011 is communicated with the rear connecting pipe 1012, and the front side of the support main pipe 1011 is communicated with the front connecting pipe 1013. By arranging the temporary storage assembly 101, the support main pipe 1011 can support and limit the rear connecting pipe 1012 and the front connecting pipe 1013, and support and limit the preheating assembly 102, so that the PP particles after granulation can be temporarily stored and transported. The rear connecting pipe 1012 can be connected with the preparation mechanism 2, and the preparation mechanism 2 can conveniently transport air. The front connecting pipe 1013 can be connected with and limited by the discharging assembly 103.

[0050] As shown in Figure 4 The preheating assembly 102 comprises a conveying pipe 1021, a feeding pipe 1022 and a preheating heater 1023. The feeding pipe 1022 is communicated at the top of the conveying pipe 1021, and the preheating heater 1023 is bolted to the top of the surface of the feeding pipe 1022. By arranging the preheating assembly 102, the conveying pipe 1021 can support and limit the feeding pipe 1022, and temporarily store the PP raw materials. The feeding pipe 1022 can be externally connected with a PP raw material conveying device, and the PP raw material conveying device can be conveyed into the conveying pipe 1021. After being powered on and started, the electrical energy can be converted into heat energy, which is then transmitted to the PP raw materials for preheating treatment.

[0051] As shown in Figure 5 The discharging assembly 103 comprises a discharging elbow 1031, a receiving hopper 1032 and a discharging port 1033. The discharging elbow 1031 is communicated at the front side of the support main pipe 1011. The receiving hopper 1032 is communicated at the bottom of the discharging elbow 1031. The discharging port 1033 is formed at the bottom of the receiving hopper 1032. By arranging the discharging assembly 103, the discharging elbow 1031 can guide and transport the PP particles after granulation. The receiving hopper 1032 can guide the PP particles to the discharging port 1033. The discharging port 1033 can discharge the PP particles.

[0052] As shown in Figure 5 The buffering assembly 104 comprises an exhaust port 1041, a blocking net 1042 and a gauze cotton plate 1043. The exhaust port 1041 is formed on the surface of the discharging elbow 1031. The blocking net 1042 is bolted to the inner wall of the exhaust port 1041. The gauze cotton plate 1043 is bolted to the inner wall of the blocking net 1042. By arranging the buffering assembly 104, the exhaust port 1041 can exhaust the flowing air. The blocking net 1042 can block the PP particles. The gauze cotton plate 1043 is made of sponge material, and its softness can buffer the PP particles.

[0053] Brief use process: first, the modified flame-retardant PP raw material conveying device is connected to the feeding pipe 1022, then the conveying mechanism 1 is powered on and started, then the PP raw material enters the conveying pipe 1021, the preheating heater 1023 preheats the PP raw material, then the PP raw material enters the preparation mechanism 2 for granulation, after the preparation mechanism 2 completes the granulation of the PP raw material, the PP particles are blown to the discharge elbow 1031 in the preparation mechanism 2 and are blocked by the blocking net 1042 and the mesh cotton plate 1043, then fall into the receiving hopper 1032, and finally discharge from the discharge port 1033.

[0054] Example 2:

[0055] Reference Figures 6-10 A modified flame-retardant PP particle preparation device for household appliance shells, comprising a preparation mechanism 2, the preparation mechanism 2 is bolted to the inner wall of the conveying mechanism 1, the preparation mechanism 2 comprises a discharging assembly 201, a feeding assembly 202, a cutting assembly 203 and a pushing assembly 204, the discharging assembly 201 is communicated with the inner wall of the preheating assembly 102, the feeding assembly 202 is bolted to the rear side of the discharging assembly 201, the cutting assembly 203 is bolted to the front side of the feeding assembly 202, the inner wall of the cutting assembly 203 is slidingly connected with the surface of the discharging assembly 201, and the pushing assembly 204 is communicated with the rear side of the temporary storage assembly 101. By arranging the preparation mechanism 2, the discharging assembly 201 can uniformly discharge the PP raw material, which facilitates uniform cutting by the cutting assembly 203. The feeding assembly 202 can uniformly convey the PP raw material, and can make the rotation speed of the cutting assembly 203 consistent with the rotation speed of the feeding assembly 202. The cutting assembly 203 can cut and granulate the PP raw material, uniformly granulate the PP raw material, and the pushing assembly 204 can use air to convey the PP particles and cool the PP particles.

[0056] As shown in Figure 7 , the discharging assembly 201 comprises a storage cylinder 2011, an inlet 2012 and a discharge port 2013. The storage cylinder 2011 is communicated with the bottom of the conveying pipe 1021, the inlet 2012 is opened at the top of the storage cylinder 2011, and the discharge port 2013 is opened on the surface of the storage cylinder 2011. By arranging the discharging assembly 201, the storage cylinder 2011 can temporarily store the PP raw material and facilitate the conveying of the feeding assembly 202. The inlet 2012 allows the PP raw material to enter the storage cylinder 2011, and the discharge port 2013 discharges the PP raw material and cooperates with the cutting assembly 203 to cut the PP material into particles.

[0057] As shown in Figure 8As shown, the feeding assembly 202 includes a servo motor 2021, a spiral blade 2022 and a hollow heat pipe 2023, the servo motor 2021 is bolted on the rear side of the storage cylinder 2011, the hollow heat pipe 2023 is bolted on the output end of the front side of the servo motor 2021, and the spiral blade 2022 is communicated on the surface of the hollow heat pipe 2023. By setting the feeding assembly 202, the servo motor 2021 can convert electrical energy into mechanical energy after being powered on and started, and then transmit the mechanical energy to the hollow heat pipe 2023. The hollow heat pipe 2023 can cooperate with the cutting assembly 203 to heat the PP raw material. The spiral blade 2022 will rotate with the hollow heat pipe 2023 to transport and extrude the PP raw material, so that the PP raw material can be discharged from the discharge port 2013.

[0058] As shown in the Figure 9 cutting assembly 203 includes a heat preservation heater 2031, a heat conduction rod 2032 and a spiral cutting knife 2033, the heat conduction rod 2032 is bolted on the inner wall of the hollow heat pipe 2023, the heat preservation heater 2031 is bolted on the front side of the heat conduction rod 2032, and the spiral cutting knife 2033 is bolted on the surface of the heat preservation heater 2031. The inner wall of the spiral cutting knife 2033 is in contact with the surface of the storage cylinder 2011. By setting the cutting assembly 203, the heat preservation heater 2031 can convert electrical energy into heat energy after being powered on and started, and then transmit the heat energy to the heat conduction rod 2032. The heat conduction rod 2032 can transmit the heat energy to the hollow heat pipe 2023, and rotate the heat preservation heater 2031 with the rotation of the hollow heat pipe 2023. The spiral cutting knife 2033 will rotate on the surface of the storage cylinder 2011 with the rotation of the heat preservation heater 2031, and the rotating speed is equivalent to the speed of the operation of the servo motor 2021, so that the PP raw material discharged from the discharge port 2013 can be uniformly cut.

[0059] As shown in the Figure 10 pushing assembly 204 includes a supply pipe 2041, a dust screen 2042 and an electric fan 2043, the supply pipe 2041 is communicated on the rear side of the supporting main pipe 1011, the dust screen 2042 is bolted on the rear side of the supply pipe 2041, and the electric fan 2043 is bolted on the rear side of the supply pipe 2041. By setting the pushing assembly 204, the supply pipe 2041 can support and limit the electric fan 2043. The electric fan 2043 can suck air from the outside to the supply pipe 2041 after being powered on and started, and the dust screen 2042 can block impurities and dust in the air.

[0060] Brief description of the use process: first, the preparation mechanism 2 is powered on, when the PP raw material enters the storage cylinder 2011, the hollow heat pipe 2023 is rotated by the servo motor 2021, the spiral blade 2022 will push the PP raw material forward, the raw material will be extruded by the continuous pushing, and finally discharged from the discharge port 2013, then the heat preservation heater 2031 will start, the heat is transferred to the heat pipe 2032 and the hollow heat pipe 2023, so as to heat the PP raw material in real time, and drive the spiral cutting knife 2033 to rotate, the spiral cutting knife 2033 will rotate at the same speed with the rotation of the servo motor 2021, so as to cut the PP raw material discharged from the discharge port 2013, until the PP raw material is cut into uniform particles, then the electric fan 2043 will blow the external air to the dust screen 2042, the dust screen 2042 will filter the impurities in the air, and then the air will drive the PP particles.

[0061] The specific embodiment is only an explanation of the application, and is not a limitation of the application. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, as long as the modifications are within the scope of the claims of the application.

Claims

1. A device for preparing modified flame-retardant PP particles for household appliance housings, comprising a conveying mechanism (1) and a preparation mechanism (2), characterized in that: The preparation mechanism (2) is bolted to the inner wall of the conveying mechanism (1), the conveying mechanism (1) comprises a temporary storage assembly (101), a preheating assembly (102), a discharging assembly (103) and a buffer assembly (104), the preheating assembly (102) is communicated at the top of the temporary storage assembly (101), the discharging assembly (103) is communicated at the front side of the temporary storage assembly (101), and the buffer assembly (104) is bolted to the surface of the discharging assembly (103); the preparation mechanism (2) comprises a discharging assembly (201), a feeding assembly (202), a cutting assembly (203) and a pushing assembly (204), the discharging assembly (201) is communicated to the inner wall of the preheating assembly (102), the feeding assembly (202) is bolted to the rear side of the discharging assembly (201), the cutting assembly (203) is bolted to the front side of the feeding assembly (202), the inner wall of the cutting assembly (203) is in sliding connection with the surface of the discharging assembly (201), and the pushing assembly (204) is communicated to the rear side of the temporary storage assembly (101); The temporary storage assembly (101) comprises a support main pipe (1011), a rear connecting pipe (1012) and a front connecting pipe (1013), the rear side of the support main pipe (1011) is communicated with the rear connecting pipe (1012), and the front side of the support main pipe (1011) is communicated with the front connecting pipe (1013); The preheating assembly (102) comprises a conveying pipe (1021), a feeding pipe (1022) and a preheating heater (1023), the feeding pipe (1022) is communicated at the top of the conveying pipe (1021), and the preheating heater (1023) is bolted to the top of the surface of the feeding pipe (1022); The discharging assembly (103) comprises a discharging elbow pipe (1031), a material collecting hopper (1032) and a discharging port (1033), the discharging elbow pipe (1031) is communicated at the front side of the support main pipe (1011), the material collecting hopper (1032) is communicated at the bottom of the discharging elbow pipe (1031), and the discharging port (1033) is formed in the bottom of the material collecting hopper (1032); The buffer assembly (104) comprises an exhaust port (1041), a blocking net (1042) and a gauze cotton plate (1043), the exhaust port (1041) is formed in the surface of the discharging elbow pipe (1031), the blocking net (1042) is bolted to the inner wall of the exhaust port (1041), and the gauze cotton plate (1043) is bolted to the inner wall of the blocking net (1042); The discharging assembly (201) comprises a storage cylinder (2011), a feeding port (2012) and a discharging port (2013), the storage cylinder (2011) is communicated at the bottom of the conveying pipe (1021), the feeding port (2012) is formed in the top of the storage cylinder (2011), and the discharging port (2013) is formed in the surface of the storage cylinder (2011). The feeding assembly (202) comprises a servo motor (2021), a spiral blade (2022) and a hollow heat pipe (2023), the servo motor (2021) is bolted at the rear side of the storage cylinder (2011), the hollow heat pipe (2023) is bolted at the output end of the front side of the servo motor (2021), and the spiral blade (2022) is communicated on the surface of the hollow heat pipe (2023); The cutting assembly (203) comprises a heat preservation heater (2031), a heat conduction rod (2032) and a spiral cutting knife (2033), the heat conduction rod (2032) is bolted on the inner wall of the hollow heat pipe (2023), the heat preservation heater (2031) is bolted on the front side of the heat conduction rod (2032), the spiral cutting knife (2033) is bolted on the surface of the heat preservation heater (2031), and the inner wall of the spiral cutting knife (2033) is in contact with the surface of the storage cylinder (2011); The pushing assembly (204) comprises a blowing pipe (2041), a dust screen (2042) and an electric fan (2043), the blowing pipe (2041) is communicated on the rear side of the supporting main pipe (1011), the dust screen (2042) is bolted on the rear side of the blowing pipe (2041), and the electric fan (2043) is bolted on the rear side of the blowing pipe (2041).

2. A method for preparing the modified flame-retardant PP particles for household appliance shells using the device for preparing the modified flame-retardant PP particles for household appliance shells according to claim 1, characterized in that: The method comprises the following steps: S1. Preheating and conveying: first, the feeding pipe (1022) is connected with the modified flame-retardant PP raw material conveying device, the preheating heater (1023) is powered on and started, the preheating heater (1023) preheats the modified flame-retardant PP raw material, then the preheated modified flame-retardant PP raw material is conveyed into the preparation mechanism, after the modified flame-retardant PP particles are processed in the preparation mechanism (2), the modified flame-retardant PP particles are conveyed into the discharge elbow pipe (1031), and are blocked by the gauze cotton plate (1043) and the blocking net (1042), finally enter the discharge port (2013) and are discharged; S2. Discharging and cooling: first, when the modified flame-retardant PP raw material enters the storage cylinder (2011), the servo motor (2021) and the heat preservation heater (2031) are powered on and started, the heat preservation heater (2031) transmits heat to the heat conduction rod (2032) and the hollow heat pipe (2023), the servo motor (2021) rotates the hollow heat pipe (2023) and the heat pipe, so that the spiral blade (2022) pushes the modified flame-retardant PP raw material along with the rotation of the hollow heat pipe (2023), the spiral cutting knife (2033) rotates on the surface of the storage cylinder (2011) along with the rotation of the heat conduction rod (2032), the modified flame-retardant PP raw material is discharged from the discharge port (2013) and contacts the spiral cutting knife (2033) due to the extrusion of the spiral blade (2022), and is cut into particles by the spiral cutting knife (2033), then the electric fan (2043) is powered on and started, and the electric fan (2043) blows air onto the modified flame-retardant PP particles, so as to blow and cool the modified flame-retardant PP particles.

Images