A plastic particle processing cutter

Abstract

This invention relates to the field of plastic processing technology and discloses a pelletizer for processing plastic particles. It includes a melt feeding mechanism, with a processing device fixedly connected to the output end of the melt feeding mechanism. The processing device includes a processing chamber, a function replacement device connected to one side of the processing chamber, a pneumatic pusher installed within the function replacement device, a pneumatic device installed within the pneumatic pusher, an expansion device connected to the output end of the pneumatic pusher, and a valve body device installed within the pneumatic device. A water ring cutting device is installed on one side of the processing chamber. Through the combined design of the melt feeding mechanism and the processing device, the liquid can be kept in a suitable state for subsequent processing or treatment. The function replacement device enables various types of processing or treatment tasks to be performed within the processing device. The pneumatic pusher can drive the expansion device, which provides pneumatic power, while the expansion device adjusts the degree of expansion according to specific circumstances.

Description

Technical Field

[0001] This invention relates to the field of plastic processing technology, specifically to a pelletizer for processing plastic particles. Background Technology

[0002] A pelletizer for plastic particle processing is a device used to cut molten plastic raw materials into small pellets or particles, which can be used to manufacture various plastic products.

[0003] Water ring cutting is a relatively new technology that uses water as the cutting medium. Molten plastic is injected into a water ring, and then cut into particles using a high-speed rotating blade. This method has the advantages of low energy consumption, high cutting precision, and good cooling effect.

[0004] However, after the target output is achieved, the melting and feeding mechanism will stop supplying raw materials. At this time, residual material will remain in the pipes of the working chamber, and there are few efficient ways to remove it in the existing technology. Therefore, it does not meet the current needs. To address this, we propose a pelletizer for plastic particle processing. Summary of the Invention

[0005] The present invention provides a pelletizer for processing plastic particles, which solves the problems mentioned in the background art.

[0006] The present invention provides the following technical solution: a pelletizer for processing plastic particles, comprising a melting and feeding mechanism, wherein a processing device is fixedly connected to the output end of the melting and feeding mechanism, the processing device comprising a processing chamber, a function replacement device connected to one side of the processing chamber, a pneumatic pushing device installed inside the function replacement device, a pneumatic device installed inside the pneumatic pushing device, an expansion device connected to the output end of the pneumatic pushing device, a valve body device provided inside the pneumatic device, and a water ring cutting device provided on one side of the processing chamber.

[0007] As an optional embodiment of the pelletizer for processing plastic particles according to the present invention, the melting and feeding mechanism includes a feeding pipe, a funnel-shaped feed pipe fixedly connected to the outer wall of the feeding pipe, a heating ring installed on the outer wall of the feeding pipe, a No. 1 motor fixedly connected to one side of the feeding pipe, and a spiral conveying rod fixedly connected to the output end of the No. 1 motor. The feeding pipe is used to transport molten liquid into the processing device.

[0008] As an optional embodiment of the plastic particle processing pelletizer of the present invention, the processing device includes a processing chamber fixedly connected to one end of a feeding pipe, the inner wall of the processing chamber being connected to a first pipe through one side of the feeding pipe, and the inner wall of the processing chamber being fixedly connected to a funnel-shaped pipe on the opposite side of the first pipe, the space formed between the first pipe and the funnel-shaped pipe being used for assembling a functional replacement device.

[0009] As an optional solution for a pelletizer for processing plastic particles according to the present invention, the function replacement device includes a function chamber fixedly connected to one side of the processing chamber, a No. 1 cylinder fixedly connected to one side of the interior of the function chamber, a function replacement rod fixedly connected to the output end of the No. 1 cylinder, a waste discharge port opened at the bottom of the function replacement rod, a working port opened above the waste discharge port inside the function replacement rod, a pneumatic port opened above the working port inside the function replacement rod, and a pneumatic pushing device installed in the pneumatic port.

[0010] As an optional embodiment of the plastic particle processing pelletizer described in this invention, the pneumatic feeding device includes a second cylinder fixedly connected in the pneumatic port, a pneumatic device mounted on the side wall of the second cylinder, a piston rod slidably connected inside the second cylinder, the piston rod dividing the interior of the second cylinder into a first space and a second space, an expansion device connected to the output end of the piston rod, and a channel opened inside the piston rod communicating with the interior of the expansion device.

[0011] As an optional embodiment of the plastic particle processing pelletizer described in this invention, the pneumatic device includes a first air pipe and a second air pipe connected to a second cylinder. One end of the first air pipe is connected to a channel inside the piston rod via a hose. A valve body device is fixedly connected inside the second air pipe. The other ends of the first and second air pipes are connected to an air chamber. One side of the air chamber is connected to an air pump via a hose.

[0012] As an optional embodiment of the pelletizer for processing plastic particles according to the present invention, the expansion device includes a first disc fixedly connected to one end of a piston rod, a second disc fixedly connected to one side of the first disc via a fixing rod, an air bladder being provided in the space formed between the first disc and the second disc, and the air inlet of the air bladder communicating with the channel inside the piston rod.

[0013] As an optional solution for a pelletizer for processing plastic particles according to the present invention, the valve body device includes a first spring fixedly connected to the inner wall of the second cylinder, a first valve fixedly connected to the other end of the first spring, a second spring fixedly connected to the other end of the first valve, and a second valve fixedly connected to the other end of the second spring.

[0014] As an optional embodiment of the plastic particle processing pelletizer described in this invention, the water ring cutting device includes a cutting chamber fixedly connected to one side of the processing chamber. The cutting chamber is provided with an inlet pipe for water intake and an outlet pipe for conveying finished plastic products. A discharge hole is opened on one side of the cutting chamber, and a second motor is connected through the other side of the cutting chamber. A cutter is fixedly connected to the output end of the second motor, and the other side of the cutter is attached to the cutting chamber on the side of the discharge hole.

[0015] The present invention has the following beneficial effects:

[0016] 1. This pelletizer for processing plastic particles, through the combined design of the melting feeding mechanism and the processing device, can effectively transport molten liquid into the processing device. At the same time, through the use of heating ring and spiral conveyor, it can ensure that the liquid is kept in a suitable state for subsequent processing or treatment.

[0017] 2. This pelletizer for processing plastic particles provides a flexible way to perform function replacement tasks through a function replacement device, enabling various types of processing or handling tasks to be performed within the processing device. It can also be customized or adjusted as needed to adapt to different production requirements.

[0018] 3. This plastic pelletizer, through the combined design of a pneumatic feeding device, a pneumatic device, an expansion device, and a valve body device, achieves precise control and movement of materials. The pneumatic device provides pneumatic power, while the expansion device adjusts the degree of expansion according to specific conditions, ensuring that the expansion device always fits the funnel-shaped pipe. This ensures that the material is accurately pushed or positioned during processing, improving production efficiency and product quality. The valve body device can control the sequential start-up order of the expansion device and the second cylinder, which helps to improve production efficiency and product quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic cross-sectional view of the present invention. Figure 1 .

[0021] Figure 3 This is a schematic cross-sectional view of the present invention. Figure 2 .

[0022] Figure 4 This is a schematic cross-sectional view of the present invention. Figure 3 .

[0023] Figure 5 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0024] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B.

[0025] Figure 7 This is a schematic diagram of the pneumatic feeding device of the present invention.

[0026] Figure 8 This is a cross-sectional structural diagram of the pneumatic feeding device of the present invention.

[0027] In the diagram: 1. Melting and feeding mechanism; 101. Feeding pipe; 102. Funnel-shaped feed pipe; 103. Heating ring; 104. Motor No. 1; 105. Screw conveyor rod; 2. Processing device; 201. Processing chamber; 202. First pipe; 203. Funnel-shaped pipe; 3. Function replacement device; 301. Function chamber; 302. Cylinder No. 1; 303. Function replacement rod; 304. Waste discharge port; 305. Working port; 306. Pneumatic port; 4. Pneumatic pushing device; 401. Cylinder No. 2; 402. Piston rod; 403. First Space; 404. Second Space; 5. Pneumatic Device; 501. Air Pipe No. 1; 502. Air Pipe No. 2; 503. Air Chamber; 6. Expansion Device; 601. Disc No. 1; 603. Disc No. 2; 602. Air Bag; 7. Valve Body Device; 701. Spring No. 1; 702. Valve No. 1; 703. Spring No. 2; 704. Valve No. 2; 8. Water Ring Cutting Device; 801. Cutting Chamber; 802. Water Inlet Pipe; 803. Water Outlet Pipe; 804. Discharge Hole; 805. Motor No. 2; 806. Cutter. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] This embodiment aims to facilitate the resolution of the problem of inconvenient discharge of residual material remaining in the first pipe and the funnel-shaped pipe. Please refer to [link / reference needed]. Figure 1-8 A pelletizer for processing plastic particles includes a melting and feeding mechanism 1. The output end of the melting and feeding mechanism 1 is fixedly connected to a processing device 2. The processing device 2 includes a processing chamber 201. A function replacement device 3 is connected to one side of the processing chamber 201. A pneumatic pushing device 4 is installed inside the function replacement device 3. A pneumatic device 5 is installed inside the pneumatic pushing device 4. An expansion device 6 is connected to the output end of the pneumatic pushing device 4. A valve body device 7 is provided inside the pneumatic device 5. A water ring cutting device 8 is provided on one side of the processing chamber 201.

[0031] In this embodiment: the melting feeding mechanism 1 includes a feeding pipe 101, a funnel-shaped feed pipe 102 is fixedly connected to the outer wall of the feeding pipe 101, a heating ring 103 is installed on the outer wall of the feeding pipe 101, a No. 1 motor 104 is fixedly connected to one side of the feeding pipe 101, and a spiral conveying rod 105 is fixedly connected to the output end of the No. 1 motor 104. The feeding pipe 101 is used to transport the molten liquid into the processing device 2. The feeding pipe 101 is part of the feeding mechanism and is used to contain and transport the molten liquid. The funnel-shaped feed pipe 102 is used to introduce the raw material into the feeding pipe 101 to ensure that the liquid enters the system.

[0032] The heating ring 103, as a prior art technology, works by utilizing the principle of magnetic field induction eddy current heating. The input 50Hz / 220V AC power is rectified into 315V DC power by a rectifier circuit, and then converted into a high-frequency current with a frequency of 20-35kHz by a control circuit. When the high-frequency current passes through the coil, it generates a rapidly changing magnetic field. When the magnetic lines of force in the magnetic field pass through the metal, countless small eddy currents are generated in the metal, causing the metal itself to heat up rapidly. The heat melts the raw material entering the feeding pipe 101 into a molten liquid and keeps it stable. The molten liquid can be transported to the processing device 2 by the first motor 104 and the screw conveyor 105. Since there is a baffle in the feeding pipe 101, the molten liquid will not affect the normal operation of the first motor 104.

[0033] In this embodiment: the processing device 2 includes a processing chamber 201 fixedly connected to one end of the feeding pipe 101. The inner wall of the processing chamber 201 is connected to a first pipe 202 through one side of the feeding pipe 101. The inner wall of the processing chamber 201 is fixedly connected to a funnel-shaped pipe 203 on the opposite side of the first pipe 202. The space formed between the first pipe 202 and the funnel-shaped pipe 203 is used to assemble the function replacement device 3. The processing chamber 201, as part of the processing device 2, is fixedly connected to one end of the feeding pipe 101. The channel formed between the first pipe 202 and the funnel-shaped pipe 203 inside the processing chamber 201 allows the function replacement device 3 to slide. Through the mutual cooperation between the first pipe 202, the funnel-shaped pipe 203 and the function replacement device 3, the conversion of different functions can be realized to meet different processing needs or processing requirements without replacing the entire device, thus improving the flexibility of the device.

[0034] In this embodiment: the function replacement device 3 includes a function compartment 301 fixedly connected to one side of the processing compartment 201. A first cylinder 302 is fixedly connected to one side of the interior of the function compartment 301. A function replacement rod 303 is fixedly connected to the output end of the first cylinder 302. A waste discharge outlet 304 is opened at the bottom of the function replacement rod 303. A working port 305 is opened above the waste discharge outlet 304 inside the function replacement rod 303. A pneumatic port 306 is opened above the working port 305 inside the function replacement rod 303. A pneumatic pushing device 4 is installed in the pneumatic port 306. The first cylinder 302 serves as a pneumatic power source, providing power for the lifting and lowering of the function replacement rod 303.

[0035] When the waste discharge port 304 in the functional replacement rod 303 is connected to the first pipe 202 in the processing chamber 201, such as Figure 4 As shown, the unstable molten liquid at the beginning of operation can be discharged through the waste discharge port 304 by the screw conveyor 105 in the molten feeding mechanism 1 to prevent the plastic granules produced by the unstable molten liquid from being unqualified products. After the production target is reached, the remaining raw materials inside the first pipe 202 and the feeding pipe 101 can also be discharged through the waste discharge port 304. When the working port 305 in the functional replacement rod 303 is connected to the first pipe 202 and the funnel-shaped pipe 203 in the processing chamber 201;

[0036] like Figure 3 As shown, a passage can be formed, allowing the spiral conveyor 105 in the molten feeding mechanism 1 to deliver stable molten liquid through the working port 305 into the funnel-shaped pipe 203, and then cut into the required plastic granules by the water ring cutting device 8. When the pneumatic port 306 in the functional replacement rod 303 is connected to the funnel-shaped pipe 203 in the processing chamber 201, as... Figure 2 As shown, the molten liquid remaining in the funnel-shaped pipe 203 can be discharged from the funnel-shaped pipe 203 by the pneumatic pusher device 4.

[0037] In this embodiment: the pneumatic pushing device 4 includes a second cylinder 401 fixedly connected to the inner wall of the pneumatic port 306. A pneumatic device 5 is mounted on the side wall of the second cylinder 401. A piston rod 402 is slidably connected inside the second cylinder 401. The piston rod 402 divides the interior of the second cylinder 401 into a first space 403 and a second space 404. An expansion device 6 is connected to the output end of the piston rod 402. A channel is opened inside the piston rod 402 to communicate with the interior of the expansion device 6. The second cylinder 401 serves as the main body of the pneumatic pushing device 4 and is used to perform pushing. In operation, the pneumatic device 5 serves as the power source for the pneumatic pusher device 4, providing power for the piston movement within the second cylinder 401 to control the pushing and retraction of the expansion device 6 connected to one end of the piston rod 402. Simultaneously, through the channel opened within the piston rod 402 and connected to the pneumatic device 5, the gas supplied by the pneumatic device 5 can pass into the interior of the piston rod 402. Since the channel inside the piston rod 402 is connected to the expansion device 6, the gas passing into the piston rod 402 will enter the expansion device 6, causing the parts within the expansion device 6 to expand.

[0038] In this embodiment: the pneumatic device 5 includes a first air pipe 501 and a second air pipe 502 connected to the second cylinder 401. One end of the first air pipe 501 is connected to the channel inside the piston rod 402 through a hose. A valve body device 7 is fixedly connected inside the second air pipe 502. The other ends of the first air pipe 501 and the second air pipe 502 are connected to an air chamber 503. One side of the air chamber 503 is connected to an air pump through a hose. The air pump supplies gas to the air chamber 503. The air chamber 503 acts as a transition device, collecting the gas supplied by the air pump in the air chamber 503 and then transmitting it to the corresponding position through the first air pipe 501 and the second air pipe 502. When the air pump starts to work, because there is a valve body device 7 inside the second air pipe 502, the air chamber 503 first fills the expansion device 6 with gas through the first air pipe 501, so that the gas inside the expansion device 6 is saturated.

[0039] When the external air pressure of the second air pipe 502 reaches saturation, the air pump continuously pumps air, causing the external gas pressure to open the valve device 7 inside the second air pipe 502 and pump air into the first space 403, causing the piston rod 402 to... Figure 8 The position shown moves to the left, compressing the second space 404 and releasing air through the vent of the second cylinder 401. When the work is completed, the pneumatic device 5 starts to work in reverse, and the air pump starts to draw in air, first causing the expansion device 6 to contract, and then drawing the gas out of the first space 403 through the valve device 7 in the second air pipe 502, causing the piston rod 402 to move as shown. Figure 8 The position shown is moved to the right. The pneumatic device 5 serves as the power source for the pneumatic pusher 4, and can effectively and conveniently control the start, stop and movement of the expansion device 6 and the piston rod 402.

[0040] When the air pump is inflated, the expansion device 6 is inflated first, so that the side wall of the expansion device 6 is always in close contact with the inner wall of the funnel-shaped pipe 203, so as to better clean the residue in the funnel-shaped pipe 203. Under the premise that the expansion device 6 is always in close contact with the inner wall of the funnel-shaped pipe 203, the first valve 702 in the valve body device 7 is pushed by air pressure, so that the first space 403 and the second air pipe 502 form a channel, and the first space 403 is inflated, so that the piston rod 402 moves from the first space 403 to the second space 404, so as to better clean the residue in the funnel-shaped pipe 203.

[0041] After the cleaning work is completed, the extended expansion device 6 needs to be retracted. At this time, the air pump draws in air to first retract the gas in the expansion device 6, and then the air pressure opens the second valve 704 in the valve body device 7, so that the first space 403 and the second air pipe 502 form a channel and the gas in the first space 403 is discharged, so that the piston rod 402 moves from the second space 404 to the first space 403 for better recycling.

[0042] In this embodiment, the expansion device 6 includes a first disk 601 fixedly connected to one end of the piston rod 402. A second disk 603 is fixedly connected to one side of the first disk 601 via a fixing rod. An airbag 602 is disposed in the space formed between the first disk 601 and the second disk 603. The air inlet of the airbag 602 is connected to the channel inside the piston rod 402. The first disk 601 and the piston rod 402 can push the expansion device 6 to move when the piston rod 402 moves. Connecting the first disk 601 and the second disk 603 via the fixing rod can restrict the expansion direction of the airbag 602. Connecting the inside of the airbag 602 to the channel inside the piston rod 402 can inflate the airbag 602 through the piston rod 402, thereby controlling the operation of the expansion device 6.

[0043] In this embodiment: the valve body device 7 includes a first spring 701 fixedly connected to the inner wall of the second cylinder 401, a first valve 702 fixedly connected to the other end of the first spring 701, a second spring 703 fixedly connected to the other end of the first valve 702, and a second valve 704 fixedly connected to the other end of the second spring 703. Figure 6 As shown, in the initial state, the first spring 701 contacts the first valve 702 with the stop block on the outer wall of the second cylinder 401, so that the first space 403 of the second cylinder 401 is in a closed state, and the second spring 703 contacts the second valve 704 with one end of the first valve 702, so that the passage inside the first valve 702 is closed.

[0044] When the gas supplied by the air pump enters the second air pipe 502, due to the air pressure, the first valve 702 moves downward and stretches the first spring 701, creating a channel between the first valve 702 and the stop block on the outer wall of the second cylinder 401, allowing gas to enter the first space 403 of the second cylinder 401. At this time, the piston rod 402 moves as follows... Figure 8 As shown, the position moves to the right. When the air pump starts to work in reverse, valve 702 remains in a closed state, tightly pressed against the stop block on the outer wall of cylinder 401 due to the pressure difference between the inside and outside. At this time, valve 704, through the pressure difference between the inside and outside, pulls spring 703, creating a passage between the inside and outside spaces and venting the internal gas. Meanwhile, piston rod 402 moves as shown... Figure 8 The position shown is moved to the left.

[0045] In this embodiment, the water ring cutting device 8 includes a cutting chamber 801 fixedly connected to one side of the processing chamber 201. The cutting chamber 801 is provided with a water inlet pipe 802 for water intake and a water outlet pipe 803 for conveying finished plastic products. A discharge hole 804 is opened on one side of the cutting chamber 801, and a second motor 805 is connected through the other side of the cutting chamber 801. A cutter 806 is fixedly connected to the output end of the second motor 805. The other side of the cutter 806 is attached to the cutting chamber 801 and located on the side of the discharge hole 804. During operation, the molten liquid is pushed by the melting feeding mechanism 1 to pass through the discharge hole 804, forming the liquid into a long strip. Then, the cutter 806 is driven to rotate by the second motor 805 to cut the long strip of molten liquid that exits through the discharge hole 804 into plastic particles. All of the above work is completed in water. The cut plastic particles are quickly cooled by the driving of the water inlet pipe 802 and the water outlet pipe 803 and are transported to the corresponding position through the water outlet pipe 803.

[0046] Working principle:

[0047] Working principle of the melting feeding mechanism 1: Motor 104 drives the screw conveyor 105 to transport the raw material to the processing device 2. The heating ring 103 heats the input plastic raw material through the principle of induction eddy current, so that it melts into a molten liquid and keeps it stable.

[0048] Working principle of processing device 2: The processing chamber 201 receives molten liquid conveyed from the melting feeding mechanism 1. The space between the first pipe 202 and the funnel-shaped pipe 203 can be used to install the functional replacement device 3 to adapt to different processing needs.

[0049] Working principle of function replacement device 3: Functional chamber 301 controls the position of function replacement rod 303 through the lifting action of cylinder 302. When waste discharge port 304 is connected to first pipe 202, unstable molten liquid is discharged to prevent the generation of unqualified products. When working port 305 is connected to first pipe 202 and funnel-shaped pipe 203, stable molten liquid enters funnel-shaped pipe 203 in preparation for cutting. When pneumatic port 306 is connected to funnel-shaped pipe 203, the residual material in funnel-shaped pipe 203 is discharged by pneumatic pusher device 4.

[0050] Working principle of pneumatic pusher 4: Pneumatic pusher 4 includes a second cylinder 401 and a piston rod 402. Power is provided by pneumatic device 5. When the piston rod 402 moves to the left, it compresses the second space 404 and pushes the molten liquid out of the funnel-shaped pipe 203. When the piston rod 402 moves to the right, it draws in gas to prepare for the next pusher operation.

[0051] Working principle of pneumatic device 5: Air pipe 501 and air pipe 502 are supplied with gas by air pump. The valve body device 7 controls the starting sequence of air pipe 501 and air pipe 502. Air is filled or vented as needed to control the action of pneumatic pusher device 4.

[0052] Working principle of expansion device 6: Expansion device 6 includes a first disc 601 and a second disc 603. Expansion and recovery are achieved by the movement of piston rod 402. When gas is filled into air bladder 602, air bladder 602 expands, so that the side wall of air bladder 602 is attached to the inner wall of funnel-shaped pipe 203, and a pushing operation is performed. When gas is discharged from air bladder 602, air bladder 602 contracts into the interior of first disc 601 and second disc 603 for easy recovery and preparation for the next pushing operation.

[0053] Working principle of valve body device 7: The opening and closing of valve 1 702 and valve 2 704 are controlled by the external air pressure intensity of valve body device 7. When the air pump outputs air, the external air pressure is greater than the air pressure in the first space 403. At this time, valve 1 702 opens and valve 2 704 closes, and gas flows into the first space 403. When the air pump draws in air, the external air pressure is less than the air pressure in the first space 403. Valve 1 702 closes and valve 2 704 opens, and gas flows out of the first space 403.

[0054] Working principle of the water ring cutting device 8: The cutting chamber 801 receives molten liquid flowing from the funnel-shaped pipe 203. The water inlet pipe 802 injects water into the cutting chamber 801, forming a water flow. The second motor 805 drives the cutter 806 to rotate, cutting the long strip of molten liquid into the required plastic granules. The cut plastic granules are transported out of the cutting chamber 801 through the water outlet pipe 803 by the water flow, and are rapidly cooled by water during the transportation process.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A pelletizer for processing plastic particles, comprising a melt feeding mechanism, characterized in that: The output end of the melting feeding mechanism is fixedly connected to a processing device. The processing device includes a processing chamber. A function replacement device is connected to one side of the processing chamber. A pneumatic pusher is installed inside the function replacement device. A pneumatic device is installed inside the pneumatic pusher. An expansion device is connected to the output end of the pneumatic pusher. A valve body device is installed inside the pneumatic device. A water ring cutting device is installed on one side of the processing chamber. A first pipe runs through the inner wall of the processing chamber on one side of the feeding pipe. A funnel-shaped pipe is fixedly connected to the inner wall of the processing chamber on the opposite side of the first pipe. The pneumatic device includes a first air pipe and a second air pipe connected to the second cylinder. One end of the first air pipe is connected to a channel inside the piston rod via a hose. A valve body device is fixedly connected inside the second air pipe. The other ends of the first and second air pipes are connected to an air chamber. An air pump is connected to one side of the air chamber via a hose. The expansion device includes a first disc fixedly connected to one end of a piston rod, and a second disc fixedly connected to one side of the first disc via a fixing rod. An air bladder is provided in the space formed between the first disc and the second disc, and the air inlet of the air bladder is connected to a channel inside the piston rod. The valve body device includes a first spring fixedly connected to the inner wall of the second cylinder, a first valve fixedly connected to the other end of the first spring, a second spring fixedly connected to the other end of the first valve, and a second valve fixedly connected to the other end of the second spring. The function replacement device includes a function compartment fixedly connected to one side of the processing compartment. A cylinder is fixedly connected to one side of the interior of the function compartment. A function replacement rod is fixedly connected to the output end of the cylinder. A waste discharge port is opened at the bottom of the function replacement rod. A working port is opened above the waste discharge port inside the function replacement rod. A pneumatic port is opened above the working port inside the function replacement rod. A pneumatic pushing device is installed in the pneumatic port. The pneumatic feeding device includes a second cylinder fixedly connected inside the pneumatic port. A pneumatic device is mounted on the side wall of the second cylinder. A piston rod is slidably connected inside the second cylinder. The piston rod divides the interior of the second cylinder into a first space and a second space. An expansion device is connected to the output end of the piston rod. A channel is opened inside the piston rod to communicate with the interior of the expansion device.

2. The pelletizer for processing plastic particles according to claim 1, characterized in that: The melting and feeding mechanism includes a feeding pipe, a funnel-shaped feed pipe fixedly connected to the outer wall of the feeding pipe, a heating ring installed on the outer wall of the feeding pipe, a No. 1 motor fixedly connected to one side of the feeding pipe, and a spiral conveying rod fixedly connected to the output end of the No. 1 motor. The feeding pipe is used to transport the molten liquid into the processing device.

3. A pelletizer for processing plastic particles according to claim 2, characterized in that: The processing device includes a processing chamber fixedly connected to one end of a feeding pipe, and the space formed between the first pipe and the funnel-shaped pipe is used for assembling a functional replacement device.

4. A pelletizer for processing plastic particles according to claim 3, characterized in that: The water ring cutting device includes a cutting chamber fixedly connected to one side of the processing chamber. The cutting chamber is equipped with an inlet pipe for water intake and an outlet pipe for conveying finished plastic products. A discharge hole is opened on one side of the cutting chamber. A second motor is connected through the other side of the cutting chamber. A cutter is fixedly connected to the output end of the second motor. The other side of the cutter is attached to the cutting chamber on the side of the discharge hole.

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