Polyethylene wax granulator

Abstract

The invention discloses a polyethylene wax granulator. The polyethylene wax granulator comprises a feeding extruder, a base; the number of the supporting arms is four; the cooling bin is supported through the supporting arm, and a cooling channel penetrating in the discharging direction of the feeding extruder is formed in the cooling bin; compared with an existing water tank immersion cooling mode, the cooling mode of the device is milder and more linear, pre-cooling is carried out through air rapidly blown out of the cooling bin before entering the cooling bin, then cooling is carried out through air with water mist flowing at a high speed after entering the cooling bin, and the cooling efficiency is improved. Sudden cooling is not needed, and the utilization rate of water is higher.

Description

Technical Field

[0001] This invention relates to the field of mechanical technology, specifically to a polyethylene wax granulator. Background Technology

[0002] Plastic pelletizers are commonly used equipment to produce recycled plastic pellets from waste plastics or plastic raw materials through melting, extrusion, cooling, and pelletizing. After the plastic melt is extruded from the die to form plastic strips, it needs to be cooled and shaped in time before subsequent pelletizing processing.

[0003] Currently, the most common cooling methods in the industry are water cooling and fan cooling. Water cooling involves directly immersing the plastic strip in cooling water, resulting in rapid cooling. However, this can lead to localized overcooling or uneven stress distribution in heat-sensitive plastics. Fan cooling uses airflow from a fan to cool the plastic strip, which avoids water stains but suffers from low cooling efficiency and poor cooling uniformity, making it unsuitable for the cooling requirements of high-speed, high-volume extrusion production lines. Furthermore, the air cooling process is noisy and tends to accumulate dust. Summary of the Invention

[0004] The purpose of this invention is to provide a polyethylene wax granulator to solve the problems mentioned in the background art.

[0005] A polyethylene wax granulator includes a feeding extruder; a base; four support arms; a cooling chamber supported by the support arms, the cooling chamber having a cooling channel running through it along the discharge direction of the feeding extruder; and a cooling rotor disposed within the cooling chamber, having a rotatable jetting component supplied with air by an external air supply pipe, the jetting direction of the jetting component being offset from the perpendicular direction of its rotation axis, and having at least two jetting nozzles evenly distributed around the rotation axis of the jetting component.

[0006] Preferably, the cooling core includes two sets of hollow tube frames with dynamic sealing bearings at one end, and a stainless steel hollow tube rotatably disposed in the middle of the hollow tube frames. Slit nozzles are circumferentially and equidistantly arranged on the outer wall of the stainless steel hollow tube, and the slit nozzles communicate with the inner cavity of the stainless steel hollow tube.

[0007] Preferably, the base is fixed at both ends with rotating arms that fix the ends of the hollow tube frame. Specifically, the rotating arms are fixed to the base by welding or bolts. The hollow tube frame is fixed to the upper end of the rotating arms by metal clips and bolts. During operation, the stainless steel hollow tube rotates relative to the hollow tube frame under the action of the dynamic sealing bearing.

[0008] Preferably, the angle between the jet direction at the end of the slit nozzle and the tangent of the outer wall of the stainless steel hollow tube is α, and α is in the range of 30 degrees and 60 degrees.

[0009] Preferably, the angle of 'a' is 45 degrees, a protective sleeve is provided on the outside of the stainless steel hollow tube, the two ends of the protective sleeve are fixed on the hollow tube frame, and the plastic pull strip is completely outside the protective sleeve when passing through the cooling chamber.

[0010] Preferably, it also includes a pressurized air supply pipe for supplying air to the cooling core. The pressurized air supply pipe is connected to a matching pressurized air source. The pressurized air supply pipe is connected to the hollow tube frame through a pipe joint and the pressurized air is sent into the stainless steel hollow tube through the hollow tube frame.

[0011] Preferably, it also includes an industrial atomizer, which is connected to the hollow tube frame through pipes and pipe joints. The industrial atomizer atomizes the supplied water and sends it into the stainless steel hollow tube, where it is rapidly sprayed out under the action of pressurized air.

[0012] Preferably, it also includes a water tank, which is fixed in the middle of the base and located below the cooling chamber. The belly of the cooling chamber is connected to the water tank, and the inner wall of the cooling chamber has a hydrophobic coating.

[0013] Preferably, the industrial atomizer and the water tank are connected by a water supply pipe, the output port of the industrial atomizer is connected to the hollow tube frame through a mist supply pipe and a tee connector, the pressurized air supply pipe is connected to the mist supply pipe through a tee connector, and the inner diameter of the hollow tube frame is larger than the inner diameter of the mist supply pipe.

[0014] Preferably, the cooling chamber includes a lower chamber shell and an upper chamber shell. The lower chamber shell is fixed relative to the base, and the upper chamber shell is movable up and down relative to the base. The lower chamber shell has an adjustment state separated from the upper chamber shell and a cooling working state engaged with the upper chamber shell. In the cooling working state, the mating surfaces of the upper and lower chamber shells are sealed, and a sealing strip is provided at the mating surfaces of the upper and lower chamber shells. An upwardly protruding electromagnet block is fixed on the lower chamber shell, and an armature ring adapted to the electromagnet block is fixed on the upper chamber shell. When the lower and upper chamber shells are engaged, the electromagnet block is inserted into the armature ring and magnetically attracted after being energized. Both ends of the upper and lower chamber shells have a necked portion and a flared portion.

[0015] Preferably, the support arm includes a support frame fixed on the base and a power push rod disposed within the support frame, wherein a connecting seat is fixedly provided on the upper compartment shell by bolts, and the actuating end of the power push rod is fixedly connected to the connecting seat, and the height of the upper compartment shell is adjusted under the drive of the power push rod.

[0016] Compared with existing technologies, the beneficial effects of this invention are as follows: Compared with existing water tank immersion cooling, the cooling method of this device is more gentle and linear. Before entering the cooling chamber, the material is pre-cooled by air blown out of the cooling chamber, and then cooled by high-speed flowing air with water mist after entering the cooling chamber. It is not a sudden drop in temperature, and the water utilization rate is more efficient. Compared with immersion in still water, the high-speed flowing and misty air has a higher thermal conductivity. In addition, the cooling channel of this device is at the same height as the plastic extrusion strip, eliminating the need for multiple bends (cooling water tanks require guide wheels to bend the plastic extrusion strip and press it into the water). The stress of the plastic is more uniform, which is beneficial for subsequent pelletizing. Compared with traditional air cooling, this device is also more efficient. Furthermore, during the cooling process, the water mist makes it less likely for the airflow to blow dust from the environment onto the plastic extrusion strip, while traditional industrial fans blow dust from the air directly onto the material, affecting the quality of the final product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a front view of the cooling chamber 13, water tank 12, and base 11 of the present invention.

[0019] Figure 3 yes Figure 2 A schematic diagram of the AA-direction cross-section.

[0020] Figure 4 This is a schematic diagram of the structure of the present invention (cooling chamber 13 is in the open state).

[0021] Figure 5 This is a side view structural diagram of the present invention.

[0022] Figure 6 This is a three-dimensional structural schematic diagram of the cooling chamber 13, water tank 12, and base 11 of the present invention.

[0023] Figure 7 This is a schematic diagram of the structure of the sheath 32 and the stainless steel hollow tube 20 of the present invention.

[0024] The markings in the attached diagram are described as follows: 10. Feeding extruder; 11. Base; 12. Water tank; 13. Cooling chamber; 14. Support arm; 15. Water supply pipe one; 16. Industrial atomizer; 17. T-connector one; 18. T-connector two; 19. Hollow tube frame; 20. Stainless steel hollow tube; 21. Slit nozzle; 22. Dynamic seal bearing; 23. Support frame; 24. Power push rod; 25. Connecting seat; 26. Armature ring; 27. Electromagnet block; 28. Upper chamber shell; 29. ​​Neck section; 30. Flaring section; 31. Atom supply pipe one; 32. Sheath; 33. Cooling rotor; 34. Lower chamber shell; 35. Rotating arm; 36. Pressurized air supply pipe. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-7 This invention provides a polyethylene wax granulator, comprising a feed extruder 10 for melting and pressurizing raw materials and extruding them in strip form; a base 11, serving as a reference structure for supporting and positioning other components to ensure stable connection during operation; four support arms 14; a cooling chamber 13 supported by the support arms 14, the cooling chamber 13 having a cooling channel extending along the discharge direction of the feed extruder 10; and a cooling rotor 33 disposed within the cooling chamber 13, having a rotatable jetting component supplied with air via an external air supply pipe, the jetting direction of the jetting component being offset from the perpendicular direction of its rotation axis, and at least... The device has two jet nozzles evenly distributed around the axis of the jet component. After high-pressure air supply, the reaction force at the end of the jet nozzles drives the jet component to rotate, forming a rapid airflow ring inside the cooling chamber 13 to cool the plastic extrusion strip passing through the cooling chamber 13. Specifically, the plastic extrusion strip of the feed extruder 10 is cooled by the high-speed airflow when passing through the cooling chamber 13. At the same time, the airflow is rapidly ejected from both ends of the cooling chamber 13 to pre-cool the plastic extrusion strip that has not yet entered the cooling chamber 13. Compared with the existing cooling method of direct immersion in water, this structure has a more linear cooling rate, which helps to reduce the problem of local overcooling or uneven stress that may occur in heat-sensitive plastics.

[0027] Preferably, the cooling rotor 33 includes two sets of hollow tube frames 19 with dynamic sealing bearings 22 at one end, and a stainless steel hollow tube 20 rotatably disposed between the hollow tube frames 19. Slit nozzles 21 are circumferentially spaced at equal intervals on the outer wall of the stainless steel hollow tube 20. The slit nozzles 21 communicate with the inner cavity of the stainless steel hollow tube 20. The slit nozzles 21 can be fixed to the stainless steel hollow tube 20 by welding. Unlike traditional nozzles, the slit nozzles 21 use long, flat slits, providing surface-like airflow during rotation. Its rapid rotation forms a fast airflow ring, which has a delicate, stable and uniform heat exchange effect. Compared with traditional industrial fans that blow directly onto the plastic extrusion strip, it has a better and more uniform heat dissipation effect. Moreover, with the reflection of the cooling chamber 13, the airflow flows rapidly to the two outlets of the cooling chamber 13, carrying away the hot air and effectively and evenly covering the outer surface of the plastic extrusion strip. In contrast, traditional industrial fans can only cool the air-receiving surface of the plastic extrusion strip (usually the top), and the cooling uniformity is generally poor. Its performance and effect are unsatisfactory for the manufacturing requirements of some high-quality plastic granules.

[0028] Preferably, the base 11 is fixed at both ends with rotating arms 35 that fix the ends of the hollow tube frame 19. Specifically, the rotating arms 35 are fixed to the base 11 by welding or bolts. The hollow tube frame 19 is fixed to the upper end of the rotating arms 35 by metal sleeves and bolts. During operation, the stainless steel hollow tube 20 rotates relative to the hollow tube frame 19 under the action of the dynamic sealing bearing 22.

[0029] Preferred, such as Figure 5 The angle between the jet direction at the end of the slit nozzle 21 and the tangent of the outer wall of the stainless steel hollow tube 20 is α, where α is between 30 and 60 degrees. Any angle within this range can drive the stainless steel hollow tube 20 to rotate with good efficiency.

[0030] Preferably, the angle of 'a' is 45 degrees. A sheath 32 is provided on the outside of the stainless steel hollow tube 20. The two ends of the sheath 32 are fixed on the hollow tube frame 19, which provides a non-sealed physical separation between the rotatable stainless steel hollow tube 20 and the plastic extrusion strip, ensuring that the plastic extrusion strip passes through the cooling chamber 13 continuously and intact. When the plastic strip passes through the cooling chamber 13, it is completely located outside the sheath 32.

[0031] Preferably, it also includes a pressurized air supply pipe 36 for supplying air to the cooling core 33. The pressurized air supply pipe 36 is connected to a matching pressurized air source, specifically composed of an air compressor and air tank, etc. The specific structure is existing technology and will not be described in detail. The pressurized air supply pipe 36 is connected to the hollow tube frame 19 through a pipe joint and pressurized air is sent into the stainless steel hollow tube 20 through the hollow tube frame 19.

[0032] Preferably, it also includes an industrial atomizer 16, which is connected to the hollow tube frame 19 through pipes and pipe joints. The industrial atomizer 16 atomizes the supplied water and sends it into the stainless steel hollow tube 20. Under the action of pressurized air, the water mist is sprayed out quickly to absorb heat. On the one hand, it improves the heat absorption efficiency, and on the other hand, it improves the water utilization efficiency compared with water tank cooling. Unlike spraying, the water mist is finer and has a better linear cooling effect.

[0033] Preferably, it also includes a water tank 12, which is fixed in the middle of the base 11 and located below the cooling chamber 13. The belly of the cooling chamber 13 is connected to the water tank 12. The inner wall of the cooling chamber 13 has a hydrophobic coating. After the water mist is sprayed out, it hits the inner wall of the cooling chamber 13 and quickly drips and accumulates. Under the action of the hydrophobic coating, it quickly slides down to the belly of the cooling chamber 13 and flows into the water tank 12 for recycling.

[0034] Preferably, the industrial atomizer 16 and the water tank 12 are connected by a water supply pipe 15. The output port of the industrial atomizer 16 is connected to the hollow tube frame 19 through a mist supply pipe 31 and a three-way connector 18. The pressurized air supply pipe 36 is connected to the mist supply pipe 31 through a three-way connector 17. The inner diameter of the hollow tube frame 19 is larger than the inner diameter of the mist supply pipe 31. Initially, the water tank 12 is filled with water. After the industrial atomizer 16 starts working, it sends water mist in and sprays it out as a surface mist from the nozzle of the slot nozzle 21 along with pressurized air. Under the rotation of the stainless steel hollow tube 20, a high-flow-rate, high-humidity cooling environment is quickly formed in the cooling chamber 13, resulting in excellent cooling uniformity.

[0035] Preferably, the cooling chamber 13 includes a lower chamber shell 34 and an upper chamber shell 28. The lower chamber shell 34 is fixed relative to the base 11, and the upper chamber shell 28 is movable up and down relative to the base 11. The lower chamber shell 34 has an adjustment state that is separated from the upper chamber shell 28 and a cooling working state that is engaged with the upper chamber shell 28. In the cooling working state, the mating surfaces of the upper chamber shell 28 and the lower chamber shell 34 are sealed. Specifically, a sealing strip is provided at the mating surfaces of the upper chamber shell 28 and the lower chamber shell 34. An upwardly protruding electromagnet block 27 is fixedly provided on the lower housing 34, and an armature ring 26 adapted to the electromagnet block 27 is fixedly provided on the upper housing 28. When the lower housing 34 and the upper housing 28 are in the engaged state, the electromagnet block 27 is inserted into the armature ring 26 and magnetically attracted after being energized, ensuring the stability of the connection between the lower housing 34 and the upper housing 28; in addition, both ends of the upper housing 28 and the lower housing 34 have necked portions 29 and flared portions 30, such as Figure 6 The necked section 29 further increases the pressure and velocity of air leaving the cooling chamber 13, which can pre-cool materials that have not entered the cooling chamber 13, reduce water mist leakage, and improve water mist condensation and recovery rate.

[0036] Preferably, the support arm 14 includes a support frame 23 fixed on the base 11 and a power push rod 24 disposed in the support frame 23. A connecting seat 25 is bolted to the upper chamber shell 28. The actuating end of the power push rod 24 is fixedly connected to the connecting seat 25. The height of the upper chamber shell 28 is adjusted under the drive of the power push rod 24. The power push rod 24 can use mature drive actuators such as servo electric push rods, hydraulic push rods, and pneumatic push rods in the prior art. This facilitates the passing of the plastic extrusion strip through the cooling chamber 13 after the upper chamber shell 28 is opened, and also facilitates assembly and maintenance.

[0037] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined herein, and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Thus, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. A polyethylene wax granulator, characterized in that: Includes a feeding extruder (10); a base (11); four support arms (14); a cooling chamber (13) supported by the support arms (14), the cooling chamber (13) having a cooling channel running through it along the discharge direction of the feeding extruder (10); and a cooling rotor (33) disposed in the cooling chamber (13) and having a rotatable jetting component, the jetting component being supplied with air through an external air supply pipe, the jetting direction of the jetting component being offset from the perpendicular direction of its rotation axis, and having at least two jetting ports evenly distributed around the rotation axis of the jetting component.

2. The polyethylene wax granulator according to claim 1, characterized in that: The cooling core (33) includes two sets of hollow tube frames (19) with dynamic sealing bearings (22) at one end, and a stainless steel hollow tube (20) rotatably disposed in the middle of the hollow tube frames (19). Slit nozzles (21) are circumferentially and equidistantly arranged on the outer wall of the stainless steel hollow tube (20), and the slit nozzles (21) are in communication with the inner cavity of the stainless steel hollow tube (20).

3. A polyethylene wax granulator according to claim 2, characterized in that: The base (11) is fixed at both ends with rotating arms (35) that fix the ends of the hollow tube frame (19). Specifically, the rotating arms (35) are fixed to the base (11) by welding or bolts. The hollow tube frame (19) is fixed at the upper end of the rotating arms (35) by metal sleeves and bolts. During operation, the stainless steel hollow tube (20) rotates relative to the hollow tube frame (19) under the action of the dynamic sealing bearing (22).

4. A polyethylene wax granulator according to claim 3, characterized in that: The angle between the jet direction at the end of the slit nozzle (21) and the tangent of the outer wall of the stainless steel hollow tube (20) is α, and α is in the range of 30 degrees and 60 degrees.

5. A polyethylene wax granulator according to claim 4, characterized in that: The angle of a is 45 degrees. A protective sleeve (32) is provided on the outside of the stainless steel hollow tube (20). The two ends of the protective sleeve (32) are fixed on the hollow tube frame (19). When the plastic pull strip passes through the cooling chamber (13), it is completely located outside the protective sleeve (32).

6. A polyethylene wax granulator according to claim 5, characterized in that: It also includes a pressurized air supply pipe (36) for supplying air to the cooling core (33). The pressurized air supply pipe (36) is connected to a matching pressurized air source. The pressurized air supply pipe (36) is connected to the hollow tube frame (19) through a pipe joint and pressurized air is sent into the stainless steel hollow tube (20) through the hollow tube frame (19).

7. A polyethylene wax granulator according to claim 6, characterized in that: It also includes an industrial atomizer (16), which is connected to the hollow tube frame (19) through pipes and pipe joints. The industrial atomizer (16) atomizes the supplied water and sends it into the stainless steel hollow tube (20), where it is quickly sprayed out under the action of pressurized air.

8. A polyethylene wax granulator according to claim 7, characterized in that: It also includes a water tank (12), which is fixed in the middle of the base (11) and located below the cooling chamber (13). The belly of the cooling chamber (13) is connected to the water tank (12), and the inner wall of the cooling chamber (13) has a hydrophobic coating.

9. A polyethylene wax granulator according to claim 8, characterized in that: The industrial atomizer (16) and the water tank (12) are connected by a water supply pipe (15). The output port of the industrial atomizer (16) is connected to the hollow tube frame (19) through a mist supply pipe (31) and a three-way pipe connector (18). The pressurized air supply pipe (36) is connected to the mist supply pipe (31) through a three-way pipe connector (17). The inner diameter of the hollow tube frame (19) is larger than the inner diameter of the mist supply pipe (31).

10. A polyethylene wax granulator according to claim 1, characterized in that: The cooling chamber (13) includes a lower chamber shell (34) and an upper chamber shell (28). The lower chamber shell (34) is fixed relative to the base (11), and the upper chamber shell (28) can move up and down relative to the base (11). The lower chamber shell (34) has an adjustment state that is separated from the upper chamber shell (28) and a cooling working state that is engaged with the upper chamber shell (28). In the cooling working state, the joint surface of the upper chamber shell (28) and the lower chamber shell (34) is sealed, and a sealing strip is provided at the joint surface of the upper chamber shell (28) and the lower chamber shell (34). An upwardly protruding electromagnet block (27) is fixed on the lower chamber shell (34), and an armature ring adapted to the electromagnet block (27) is fixed on the upper chamber shell (28). (26) When the lower compartment shell (34) and the upper compartment shell (28) are in the engaged state, the electromagnet block (27) is inserted into the armature ring (26) and magnetically attracted after being energized; the upper compartment shell (28) and the lower compartment shell (34) have necked portions (29) and flared portions (30) at both ends; the support arm (14) includes a support frame (23) fixed on the base (11) and a power push rod (24) disposed in the support frame (23), wherein a connecting seat (25) is fixedly provided on the upper compartment shell (28) by bolts, and the execution end of the power push rod (24) is fixedly connected to the connecting seat (25), and the height of the upper compartment shell (28) is adjusted under the drive of the power push rod (24).

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