Continuous plastic particle granulating device

Abstract

The utility model relates to the technical field of plastic particle granulation, and discloses a continuous plastic particle granulation device which comprises a supporting platform, a threaded rod rotating extrusion part and a rotating particle cutting part, supporting legs are symmetrically and fixedly mounted at the bottom of the supporting platform, and supporting cushion blocks are fixedly mounted at the bottoms of the supporting legs. Strong shearing and meshing effects are formed through the reverse rotation design of the first threaded extrusion rod and the second threaded extrusion rod, plastic particles are subjected to high-frequency shearing in a threaded extrusion cavity, melting is accelerated, unmelted particles are crushed, and the rotating speeds of the two screws are consistent through meshing transmission of the driving gear and the driven gear, so that the plastic particles can be uniformly extruded. And material accumulation or pressure unbalance caused by the rotating speed difference is avoided, and efficient melting and stable extrusion of plastic particles are achieved. And the continuous production capacity and the flexible adaptability of the device remarkably improve the comprehensive performance of the granulation device.

Description

Technical Field

[0001] This utility model relates to the field of plastic particle granulation technology, specifically to a continuous plastic particle granulation device. Background Technology

[0002] In the plastics processing industry, the manufacture of plastic pellets is a crucial step. Traditional methods of plastic pellet manufacturing often employ intermittent production, which is not only inefficient but also makes it difficult to guarantee the uniformity and quality stability of the pellets. Furthermore, the granulation process involves multiple steps, including high-temperature melting, extrusion molding, and cutting, each of which can potentially affect the performance of the final product.

[0003] Especially in the extrusion molding and cutting steps, traditional equipment often has some problems. For example, an unreasonable design of the extruder may cause uneven stress on the plastic raw material during the extrusion process, which will affect the consistency of the shape and size of the plastic particles. At the same time, the design of the cutting device may also affect the cutting efficiency and cutting quality. If the cutting speed is not fast enough or the cutting blade is not sharp enough, it may cause the cut plastic particles to be of uneven size, or even produce fragments or adhesion. Utility Model Content

[0004] The purpose of this invention is to provide a continuous plastic particle granulation device, which solves the technical problems of low efficiency and uneven granulation in the existing plastic particle granulation process, and achieves the goal of improving granulation efficiency and ensuring granulation uniformity.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a continuous plastic particle granulation device, comprising a support platform, a threaded rod rotating extrusion section, and a rotating pelletizing section. Support legs are symmetrically fixedly installed at the bottom of the support platform, and support pads are fixedly installed at the bottom of the support legs. The threaded rod rotating extrusion section is located at the top of the support platform, and the rotating pelletizing section is located on the outer wall of the threaded rod rotating extrusion section.

[0006] Preferably, the threaded rod rotating extrusion part specifically includes: a support fixing block, which is fixedly installed on the top outer wall of the support platform; a threaded extrusion cylinder, which is fixedly installed on the top outer wall of the support fixing block; and a feeding rectangular hopper, which is connected to the top outer wall of the threaded extrusion cylinder.

[0007] Preferably, the threaded extrusion cylinder has a threaded extrusion cavity inside, a drive housing is fixedly installed at one end of the threaded extrusion cylinder, a rotating sleeve is fixedly installed on the inner wall of the drive housing, a sealing plate is fixedly installed on the outer wall of the drive housing, a motor mounting bracket is fixedly installed on the outer wall of the sealing plate, a motor is fixedly installed inside the motor mounting bracket, and a rotating rod is fixedly connected to the output end of the motor.

[0008] A motor is installed, which drives two threaded extrusion rods to rotate synchronously in opposite directions via a gear transmission system, creating a highly efficient shear force field. This synchronous design is more efficient in plasticizing than that of a single-screw extruder, ensuring that plastic particles are uniformly mixed during the melting process and reducing unmelted particles.

[0009] Preferably, the other end of the rotating rod movably penetrates the outer wall of the sealing plate and extends into the interior of the rotating sleeve. The other end of the rotating rod is rotatably connected to the inner wall of the rotating sleeve. A drive gear is fixedly sleeved on the outer wall of the rotating rod. The drive gear meshes with a driven gear. The driven gears are symmetrically arranged inside the drive housing.

[0010] Preferably, a transmission rod is fixedly connected to one side of the outer wall of the driven gear, and the other end of the transmission rod movably penetrates the inner wall of the drive housing and extends into the interior of the threaded extrusion cavity. The other end of the transmission rod is fixedly connected to a threaded extrusion rod one and a threaded extrusion rod two, which are disposed inside the threaded extrusion cavity. A heating sleeve is fixedly fitted on the outer wall of the threaded extrusion cylinder.

[0011] A heating jacket is installed, which tightly wraps around the threaded extrusion cylinder. It quickly transfers heat to the material through conduction and radiation, ensuring that the plastic particles are fully melted under the shearing action of the twin screws, reducing unmelted particles. The heating jacket has independent temperature control in different zones along the cylinder axis, and the temperature gradient can be dynamically adjusted according to the material characteristics to meet the diverse needs from general plastics to engineering plastics.

[0012] Preferably, the rotating pelletizing section specifically includes: a collecting box, disposed on one side of the support platform; extrusion discharge holes, circumferentially equidistantly formed on the outer wall of the other end of the threaded extrusion cylinder; a pelletizing groove block, fixedly installed on the outer wall of the other end of the threaded extrusion cylinder; a water-cooling box, disposed at the bottom of the support platform; and a water-cooling jacket, fixedly fitted on the outer wall of the threaded extrusion cylinder.

[0013] Preferably, the outer wall of the pelletizing trough is connected to a shell, the bottom outer wall of the shell has a rectangular discharge port, a drive motor is fixedly installed on the outer wall of the shell, the output end of the drive motor is fixedly connected to a connecting rod, and the other end of the connecting rod movably passes through the outer wall of the shell and extends into the interior of the pelletizing trough.

[0014] A drive motor is installed, which directly drives the connecting rod and the circumferentially distributed blades to achieve high-frequency cutting. This ensures that the plastic strips extruded from the extrusion outlet are quickly cut off. The speed of the drive motor can be dynamically adjusted according to the screw speed of the threaded extrusion cylinder to maintain the matching of the cutting line speed and the extrusion speed, thus avoiding particle stretching or breakage.

[0015] Preferably, blades are fixedly installed at equal intervals around the outer wall of the other end of the connecting rod; an output water pump and a recovery water pump are respectively connected to the outer walls of both sides of the water-cooled box; an output water pipe is connected to the output end of the output water pump; connectors are connected to the outer walls of both sides of the water-cooled jacket; flow-retardant blocks are fixedly installed at equal intervals on the inner wall of the water-cooled jacket; a recovery water pipe is connected to the input end of the recovery water pump; and the other ends of both the output water pipe and the recovery water pipe are connected to the connectors.

[0016] This invention provides a continuous granulation device for plastic particles. It has the following beneficial effects:

[0017] (1) This utility model utilizes the reverse rotation design of the first and second threaded extrusion rods to create a strong shearing and meshing effect, causing the plastic particles to undergo high-frequency shearing within the threaded extrusion cavity. This accelerates melting and breaks down unmelted particles. Through the meshing transmission of the driving gear and the driven gear, the rotation speed of the two screws is ensured to be consistent, avoiding material accumulation or pressure imbalance caused by speed difference. This achieves efficient melting and stable extrusion of plastic particles. Its continuous production capability and flexible adaptability significantly improve the overall performance of the granulation device.

[0018] (2) This utility model directly connects the pelletizing groove block with the end of the threaded extrusion cylinder. The molten plastic is immediately cut after being extruded through the discharge hole, eliminating the pause time of traditional intermittent pelletizing and realizing efficient molding and stable production of plastic particles. The centrifugal force generated by the rotation of the blade, combined with the smooth inner wall of the pelletizing groove block, reduces the adhesion between particles and ensures rapid solidification of particles. Attached Figure Description

[0019] Figure 1 This is a frontal perspective view of the overall structure of this utility model;

[0020] Figure 2 This is a partial view of the rotating extrusion part of the threaded rod of this utility model;

[0021] Figure 3 This is a partial view of the rotating pelletizing section of this utility model;

[0022] Figure 4 This is a partial sectional view of the water-cooled jacket of this utility model.

[0023] In the diagram: 1. Support platform; 2. Support leg; 3. Threaded rod rotating extrusion section; 311. Support fixing block; 312. Threaded extrusion cylinder; 313. Heating jacket; 314. Feed rectangular hopper; 315. Threaded extrusion rod one; 316. Threaded extrusion rod two; 317. Drive gear; 318. Transmission rod; 319. Driven gear; 3111. Drive housing; 3112. Rotating sleeve; 3113. Threaded extrusion cavity; 3114. Motor fixing frame; 3115. Motor; 4. Rotating pelletizing section; 411. Extrusion discharge hole; 412. Pelletizing trough block; 413. Housing; 414. Rectangular discharge port; 415. Collection box; 416. Drive motor; 417. Connecting rod; 418. Blade; 419. Water cooling box; 4111. Recovery water pump; 4112. Output water pump; 4113. Output water pipe; 4114. Recovery water pipe; 4115. Water cooling jacket; 4116. Connector; 4117. Flow buffer block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Example

[0026] Based on the problems of low efficiency and uneven granulation in existing plastic particle granulation processes, the present invention provides a preferred embodiment of a continuous plastic particle granulation device, for example... Figures 1-4 As shown: A continuous plastic particle granulation device includes a support platform 1, a threaded rod rotating extrusion section 3, and a rotating pelletizing section 4. Support legs 2 are symmetrically fixedly installed at the bottom of the support platform 1, and support pads are fixedly installed at the bottom of the support legs 2. The threaded rod rotating extrusion section 3 is located at the top of the support platform 1, and the rotating pelletizing section 4 is located on the outer wall of the threaded rod rotating extrusion section 3.

[0027] The threaded rod rotating extrusion part 3 specifically includes: a support fixing block 311, which is fixedly installed on the top outer wall of the support platform 1; a threaded extrusion cylinder 312, which is fixedly installed on the top outer wall of the support fixing block 311; and a feeding rectangular hopper 314, which is connected to the top outer wall of the threaded extrusion cylinder 312.

[0028] The threaded extrusion cylinder 312 has a threaded extrusion cavity 3113 inside. A drive housing 3111 is fixedly installed at one end of the threaded extrusion cylinder 312. A rotating sleeve 3112 is fixedly installed on the inner wall of the drive housing 3111. A sealing plate is fixedly installed on the outer wall of the drive housing 3111. A motor mounting bracket 3114 is fixedly installed on the outer wall of the sealing plate. A motor 3115 is fixedly installed inside the motor mounting bracket 3114. A rotating rod is fixedly connected to the output end of the motor 3115.

[0029] The other end of the rotating rod moves through the outer wall of the sealing plate and extends into the interior of the rotating sleeve 3112. The other end of the rotating rod is rotatably connected to the inner wall of the rotating sleeve 3112. The outer wall of the rotating rod is fixedly fitted with a drive gear 317. The drive gear 317 is meshed with a driven gear 319. The driven gears 319 are symmetrically arranged inside the drive housing 3111.

[0030] A transmission rod 318 is fixedly connected to one side of the outer wall of the driven gear 319. The other end of the transmission rod 318 movably passes through the inner wall of the drive housing 3111 and extends into the interior of the threaded extrusion cavity 3113. The other end of the transmission rod 318 is fixedly connected to a first threaded extrusion rod 315 and a second threaded extrusion rod 316. The first threaded extrusion rod 315 and the second threaded extrusion rod 316 are disposed inside the threaded extrusion cavity 3113. A heating sleeve 313 is fixedly fitted onto the outer wall of the threaded extrusion cylinder 312.

[0031] In this embodiment, the motor 3115 inside the motor mounting bracket 3114 starts, driving the rotating rod to rotate. The driving gear 317 meshes with the driven gear 319, causing the two threaded extrusion rods 315 and 316 to rotate synchronously in opposite directions. The twin screws push the plastic particles forward within the threaded extrusion cavity 3113. The gradually changing screw pitch design creates a compression ratio, enhancing the shearing and melting effect. The heating jacket 313 heats the threaded extrusion cylinder 312 at a preset temperature, ensuring that the plastic particles are fully melted, achieving efficient melting and stable extrusion of the plastic particles. Its continuous production capability and flexible adaptability significantly improve the overall performance of the granulation device. Example

[0032] Please see Figures 1-4 Furthermore, based on Embodiment 1, the rotating pelletizing section 4 specifically includes: a collection box 415, which is disposed on one side of the support platform 1; an extrusion discharge hole 411, which is circumferentially and equidistantly opened on the outer wall of the other end of the threaded extrusion cylinder 312; a pelletizing groove block 412, which is fixedly installed on the outer wall of the other end of the threaded extrusion cylinder 312; a water cooling box 419, which is disposed at the bottom of the support platform 1; and a water cooling sleeve 4115, which is fixedly sleeved on the outer wall of the threaded extrusion cylinder 312.

[0033] The outer wall of the pelletizing trough block 412 is connected to a housing 413. A rectangular discharge port 414 is opened on the bottom outer wall of the housing 413. A drive motor 416 is fixedly installed on the outer wall of the housing 413. A connecting rod 417 is fixedly connected to the output end of the drive motor 416. The other end of the connecting rod 417 moves through the outer wall of the housing 413 and extends into the interior of the pelletizing trough block 412.

[0034] Blades 418 are fixedly installed at equal intervals around the outer wall of the other end of the connecting rod 417. Output water pump 4112 and recovery water pump 4111 are respectively connected to the outer walls of the two sides of the water cooling box 419. Output water pipe 4113 is connected to the output end of output water pump 4112. Connector 4116 is connected to the outer walls of the two sides of the water cooling jacket 4115. Flow buffer 4117 is fixedly installed at equal intervals on the inner wall of the water cooling jacket 4115. Recovery water pipe 4114 is connected to the input end of recovery water pump 4111. The other ends of output water pipe 4113 and recovery water pipe 4114 are connected to connector 4116.

[0035] In this embodiment, molten plastic is pushed to the end of the threaded extrusion cylinder 312 by the threaded extrusion rod, and a continuous plastic strip is formed through the circumferentially spaced extrusion discharge holes 411. The drive motor 416 drives the blade 418 to cut the plastic strip. The drive motor 416 on the housing 413 drives the connecting rod 417 to rotate at high speed. The circumferentially spaced blade 418 cuts the plastic strip instantly to form uniform particles, eliminating the pause time of traditional intermittent pelletizing and realizing efficient molding and stable production of plastic particles. The centrifugal force generated by the rotation of the blade, combined with the smooth inner wall of the pelletizing groove, reduces the adhesion between particles and ensures rapid solidification of the particles.

[0036] Working principle: When in use;

[0037] Step 1: Confirm that the support legs 2 and support pads of the support platform 1 are stable and without shaking. The threaded extrusion cylinder 312 is securely connected to the support platform 1 through the support fixing block 311. Check that there are no leaks in the pipeline connection between the output water pump 4112 and the recovery water pump 4111 of the water cooling box 419. The connector 4116 of the water cooling jacket 4115 is well sealed. Pour the plastic particles into the feed rectangular hopper 314, ensuring that there are no large particles or lumps.

[0038] Step 2: The motor 3115 inside the motor mounting bracket 3114 starts, driving the rotating rod to rotate. The driving gear 317 meshes with the driven gear 319, causing the two threaded extrusion rods 315 and 316 to rotate synchronously in opposite directions. The twin screws push the plastic particles forward in the threaded extrusion cavity 3113. The gradually changing pitch design forms a compression ratio, enhancing the shearing and melting effect. The heating jacket 313 heats the threaded extrusion cylinder 312 at a preset temperature to ensure that the plastic particles are fully melted.

[0039] Step 3: The molten plastic is pushed to the end of the threaded extrusion cylinder 312 by the threaded extrusion rod, and a continuous plastic strip is formed through the circumferentially spaced extrusion discharge holes 411. The drive motor 416 drives the blade 418 to cut it. The drive motor 416 on the housing 413 drives the connecting rod 417 to rotate at high speed. The circumferentially spaced blade 418 cuts the plastic strip instantly to form uniform particles.

[0040] Step 4: The output water pump 4112 pumps cold water into the water cooling jacket 4115 through the output water pipe 4113. The flow buffer 4117 extends the water flow path, efficiently cools the cylinder, and prevents the plastic melt from overheating. The hot water returns to the water cooling box 419 through the recovery water pipe 4114. After cooling, it is recycled to maintain a stable water temperature.

[0041] Step 5: The cut plastic particles enter the shell 413 through the pelletizing trough 412 and fall into the collection box 415 from the bottom rectangular discharge port 414, thus completing the continuous production cycle.

[0042] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A continuous plastic pelletizing device, comprising a support platform (1), a threaded rod rotating extrusion section (3), and a rotating pelletizing section (4), characterized in that: The bottom of the support platform (1) is symmetrically fixedly equipped with support legs (2), and the bottom of the support legs (2) is fixedly equipped with support pads; the threaded rod rotating extrusion part (3) is set on the top of the support platform (1), and the rotating pelletizing part (4) is set on the outer wall of the threaded rod rotating extrusion part (3).

2. The continuous granulation apparatus for plastic particles according to claim 1, characterized in that: The threaded rod rotating extrusion part (3) specifically includes: The support fixing block (311) is fixedly installed on the top outer wall of the support platform (1); The threaded extrusion cylinder (312) is fixedly installed on the top outer wall of the support fixing block (311); A rectangular feed hopper (314) is connected to the top outer wall of the threaded extrusion cylinder (312).

3. The continuous granulation apparatus for plastic particles according to claim 2, characterized in that: The threaded extrusion cylinder (312) has a threaded extrusion cavity (3113) inside. A drive housing (3111) is fixedly installed at one end of the threaded extrusion cylinder (312). A rotating sleeve (3112) is fixedly installed on the inner wall of the drive housing (3111). A sealing plate is fixedly installed on the outer wall of the drive housing (3111). A motor mounting bracket (3114) is fixedly installed on the outer wall of the sealing plate. A motor (3115) is fixedly installed inside the motor mounting bracket (3114). A rotating rod is fixedly connected to the output end of the motor (3115).

4. The continuous granulation apparatus for plastic particles according to claim 3, characterized in that: The other end of the rotating rod movably penetrates the outer wall of the sealing plate and extends into the interior of the rotating sleeve (3112). The other end of the rotating rod is rotatably connected to the inner wall of the rotating sleeve (3112). The outer wall of the rotating rod is fixedly fitted with a drive gear (317). The drive gear (317) is meshed with a driven gear (319). The driven gear (319) is symmetrically arranged inside the drive housing (3111).

5. The continuous granulation apparatus for plastic particles according to claim 4, characterized in that: A transmission rod (318) is fixedly connected to one side of the outer wall of the driven gear (319). The other end of the transmission rod (318) movably penetrates the inner wall of the drive housing (3111) and extends into the interior of the threaded extrusion cavity (3113). The other end of the transmission rod (318) is fixedly connected to a first threaded extrusion rod (315) and a second threaded extrusion rod (316). The first threaded extrusion rod (315) and the second threaded extrusion rod (316) are arranged inside the threaded extrusion cavity (3113). A heating sleeve (313) is fixedly fitted on the outer wall of the threaded extrusion cylinder (312).

6. The continuous granulation apparatus for plastic particles according to claim 1, characterized in that: The rotating pelletizing section (4) specifically includes: A collection box (415) is set on one side of the support platform (1); The extrusion discharge hole (411) is circumferentially and equidistantly opened on the outer wall of the other end of the threaded extrusion cylinder (312); The pelletizing trough block (412) is fixedly installed on the outer wall of the other end of the threaded extrusion cylinder (312); A water-cooled box (419) is installed at the bottom of the support platform (1); The water-cooled jacket (4115) is fixedly sleeved on the outer wall of the threaded extrusion cylinder (312).

7. A continuous plastic particle granulation apparatus according to claim 6, characterized in that: The outer wall of the pelletizing trough (412) is connected to a housing (413). A rectangular discharge port (414) is opened on the bottom outer wall of the housing (413). A drive motor (416) is fixedly installed on the outer wall of the housing (413). A connecting rod (417) is fixedly connected to the output end of the drive motor (416). The other end of the connecting rod (417) moves through the outer wall of the housing (413) and extends into the interior of the pelletizing trough (412).

8. A continuous plastic particle granulation apparatus according to claim 7, characterized in that: The other end of the connecting rod (417) is fixedly mounted with blades (418) at equal intervals around the outer wall. The two outer walls of the water-cooled box (419) are respectively connected to an output water pump (4112) and a recovery water pump (4111). The output end of the output water pump (4112) is connected to an output water pipe (4113). The two outer walls of the water-cooled jacket (4115) are connected to a connector (4116). The inner wall of the water-cooled jacket (4115) is fixedly mounted with flow-slowing blocks (4117) at equal intervals. The input end of the recovery water pump (4111) is connected to a recovery water pipe (4114). The other ends of the output water pipe (4113) and the recovery water pipe (4114) are both connected to the connector (4116).

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