Plastic extrusion granulator

Abstract

The utility model relates to the field of plastic manufacturing, in particular to a plastic extrusion granulator. According to the technical scheme, the plastic strip granulating device is characterized by comprising a rack, an extruder, a water cooling mechanism, a water blowing assembly, a traction assembly and a granulating assembly, the water cooling mechanism is fixedly installed on the rack and is adjacent to the extruder, extruded plastic strips enter the water cooling mechanism to be cooled and shaped, and the water blowing assembly is installed on the water cooling mechanism 3 to blow water on the surfaces of the plastic strips to be dry. The traction assembly is mounted on the water cooling mechanism, is adjacent to the water blowing assembly, pulls the plastic strip to move into the pelletizing assembly and is subjected to pelletizing, the traction assembly straightens the plastic strip, so that the plastic strip is cooled and shaped in the water cooling mechanism, the straightening and shaping possibility of the plastic strip is improved, and the straightening and shaping quality of the plastic strip is improved; and the subsequent pelletizing quality can be improved.

Description

Technical Field

[0001] The present application relates to the field of plastic manufacturing, and in particular to a plastic extrusion pelletizer. Background Art

[0002] Plastic pellets refer to small granular materials made by mixing, heating, melting, extruding, fine filtering, granulating and other processes under certain conditions according to the properties and uses of plastics. Plastic pellets are widely used in the manufacture of various plastic products, such as automobiles, electronics, daily necessities, building materials and other industries.

[0003] The production process of plastic pellets mainly includes the following steps. The first is the preparation of raw materials. After the raw materials are mixed, they are melted and extruded. Then they are cooled and solidified, and finally they are cut and screened. This process is mostly carried out using a plastic extruder cutting machine.

[0004] With respect to the above-mentioned related technologies, the extruded plastic strips will bend and deform due to uneven cooling during the air cooling process. When pelletizing, the pellet sizes will be uneven, resulting in poor pelletizing quality. Therefore, there is still much room for improvement. Utility Model Content

[0005] In order to improve the pelletizing quality of plastic, the present application provides a plastic extrusion pelletizer.

[0006] The present application provides a plastic extrusion pelletizer adopts the following technical solution:

[0007] A plastic extrusion pelletizer comprises a frame; an extruder, adjacent to the frame, used for extruding plastic strips; a water cooling mechanism, arranged on the frame and adjacent to the extruder, used for cooling and shaping the plastic strips; a traction assembly, arranged on the water cooling mechanism, used for traction of the plastic strips to straighten, shape and move in the water cooling mechanism; and a pelletizing assembly, adjacent to the traction assembly, used for pelletizing the plastic strips.

[0008] Through the above technical solution, the extruder melts the plastic and extrude plastic strips, the plastic strips enter the water cooling component, the traction component pulls the plastic strips to straighten the plastic strips, and the plastic strips are cooled and shaped in the water cooling mechanism, which improves the possibility of straightening and shaping the plastic strips, improves the straightening and shaping quality of the plastic strips, and is beneficial to improving the subsequent pelletizing quality.

[0009] Preferably, the water cooling mechanism comprises a cooling pool fixedly arranged on the frame, the cooling pool being filled with cold water; and a transmission roller rotatably arranged in the cooling pool, the plastic strip abutting against the transmission roller.

[0010] Through the above technical solution, the plastic strip is water-cooled in the cooling system, and the plastic strip abuts against the driving roller, so that the plastic strip is completely immersed in cold water and cooled evenly, thereby reducing the possibility of deformation of the plastic strip due to uneven cooling, which is conducive to uniform subsequent pelletizing.

[0011] Preferably, the traction assembly includes a first power element, fixedly disposed on the cooling pool, for outputting power; an upper roller, rotatably disposed on the cooling pool, fixedly connected to the first power element, the first power element being used to drive the upper roller to rotate; and a lower roller, rotatably disposed on the cooling pool, with a gap between the lower roller and the upper roller, the plastic strip passing through the gap and abutting against the upper roller and the lower roller.

[0012] Through the above technical solution, the first power element drives the upper roller to rotate, and the plastic strip is located between the upper roller and the lower roller. The plastic strip moves forward through the friction between the upper roller and the lower roller, which helps to straighten the plastic strip and complete the conveying of the plastic strip to the pelletizing component.

[0013] Preferably, it further comprises a receiving hopper, which is arranged obliquely and fixedly mounted on one end of the cooling pool, and the pelletizing assembly is arranged on the receiving hopper.

[0014] Through the above technical solution, the plastic pellets cut by the pelletizing assembly fall into the receiving hopper and slide from the receiving hopper to one place, which is convenient for collecting the plastic pellets.

[0015] Preferably, the pelletizing assembly includes a second power element, which is fixedly arranged on the receiving hopper and is used to output power; and a cutter, which is fixedly arranged on the second power element and is used to cut off the plastic strips.

[0016] Through the above technical solution, the second power element drives the cutter to cut off the plastic strip, and the cutting action is simple, and the cutting process is fast and efficient.

[0017] Preferably, it also includes a water blowing component, which is arranged on the cooling pool and adjacent to the traction component, and is used to blow away water on the surface of the plastic strip.

[0018] Through the above technical solution, the water blowing component dries the water on the surface of the plastic strip, speeds up the air drying rate of the water stains on the surface of the plastic strip, and the dried plastic strip is convenient for subsequent pelletizing.

[0019] Preferably, the water blowing assembly includes an external air source, which is arranged on the cooling pool and is used to provide dry gas; an air pipe, one end of which is fixedly connected to the external air source; and an air nozzle, which is arranged on the cooling pool, and the other end of the air pipe is fixedly connected to the air nozzle, the air pipe is used to transmit the gas to the air nozzle, and the air nozzle is used to spray the gas in a concentrated manner.

[0020] Through the above technical solution, the air nozzle sprays out the dry gas in a concentrated manner, which is beneficial to increasing the pressure of the sprayed gas, and can blow away the water on the surface of the plastic strip and dry it.

[0021] Preferably, the air nozzle is adjustably arranged on the cooling pool, and its position relative to the plastic strip can be adjusted.

[0022] Through the above technical solution, the position of the air nozzle can be adjusted according to actual production conditions so that the air nozzle can be accurately aligned with the plastic strip to facilitate drying of water on the surface of the plastic strip.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The extruder melts the plastic and extrude plastic strips. The plastic strips enter the water cooling component. The traction component pulls the plastic strips to straighten them. The plastic strips are cooled and shaped in the water cooling mechanism, which increases the possibility of straightening and shaping the plastic strips, improves the straightening and shaping quality of the plastic strips, and is conducive to improving the subsequent pelletizing quality.

[0025] 2. The first power element drives the upper roller to rotate. The plastic strip is located between the upper roller and the lower roller. The plastic strip moves forward through the friction between the upper roller and the lower roller, which helps to straighten the plastic strip and complete the conveying of the plastic strip to the pelletizing component.

[0026] 3. The position of the air nozzle can be adjusted according to the actual production situation so that the air nozzle can be accurately aligned with the plastic strip to dry the water on the surface of the plastic strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a plastic extrusion pelletizer in a preferred embodiment of the present application.

[0028] Figure 2 It is a structural schematic diagram of a plastic extrusion pelletizer from another angle in a preferred embodiment of the present application.

[0029] Explanation of the accompanying drawings: 1. frame; 2. extruder; 3. water cooling mechanism; 31. cooling tank; 32. transmission roller; 4. water blowing assembly; 41. external air source; 42. air pipe; 43. air nozzle; 5. traction assembly; 51. first power element; 52. upper roller; 53. lower roller; 6. pelletizing assembly; 61. second power element; 62. cutter; 7. side plate; 8. first gear; 9. second gear; 10. steering roller; 11. receiving hopper; 12. collecting box. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-2 This application is described in further detail.

[0031] The present application embodiment discloses a plastic extrusion pelletizer. Figure 1 and Figure 2 The plastic extrusion pelletizer includes a frame 1, an extruder 2, a water cooling mechanism 3, a water blowing component 4, a traction component 5 and a pelletizing component 6. The water cooling mechanism 3 is fixedly installed on the frame 1 and is adjacent to the extruder 2. The extruded plastic strip enters the water cooling mechanism 3 for cooling and shaping. The water blowing component 4 is installed on the water cooling mechanism 3 to dry the water on the surface of the plastic strip. The traction component 5 is installed on the water cooling mechanism 3 and is adjacent to the water blowing component 4. The plastic strip is pulled to move into the pelletizing component 6 for pelletizing.

[0032] refer to Figure 1 , the extruder 2 is placed on the ground. The extruder 2 has a feeding system, a heating system and an extrusion system. The solid plastic is added to the extruder 2 through the feeding system. The solid plastic is transported and compacted forward by the friction between the inner wall of the barrel and the surface of the screw under the action of the screw rotating under the drive of the motor. In this process, the solid plastic will be gradually melted and evenly mixed by the heat conduction of the heating ring and the heat generated by its own friction. When the plastic reaches a molten state, it will be pushed into the barrel by the screw and pass through the outlet of the barrel under the action of high temperature and high pressure. The molten plastic then passes through the mold and is extruded by the extruder 2 to form a plastic strip. In the attached drawings, the structure of the extruder 2 is not specifically displayed.

[0033] refer to Figure 1 The plastic strip extruded by the extruder 2 has a certain amount of heat and will also deform, so it needs to be cooled and shaped. However, the traditional air-cooling shaping has the problem of uneven cooling, and the plastic strip may bend and deform. Therefore, a water cooling mechanism 3 and a traction assembly 5 are provided. Specifically, the water cooling mechanism 3 includes a cooling pool 31 and a driving roller 32. The cooling pool 31 is fixedly mounted on the frame 1. The cooling pool 31 is filled with cold water, and the cooling pool 31 is adjacent to the extruder 2. The plastic strip extruded from the extruder 2 directly enters the cooling pool 31 for cooling and shaping. Since the extruder 2 is higher than the cooling pool 31, in order to allow the plastic strip pulled forward by the traction assembly 5 to be completely immersed in the cold water for cooling, the driving roller 32 is rotatably mounted on the cooling pool 31 and immersed in the cold water of the cooling pool 31. The plastic strip passes under the driving roller 32 and abuts against the driving roller 32, so that the plastic strip is completely immersed in the cold water, which is conducive to uniform cooling of the plastic strip.

[0034] refer to Figure 1 and Figure 2The traction assembly 5 is installed on the cooling pool 31 and is used to pull the plastic strip to move. Specifically, the traction assembly 5 includes a first power element 51, an upper roller 52 and a lower roller 53, wherein the two opposite side walls of the cooling pool 31 extend upwardly out of a side plate 7, and the first power element 51 is fixedly installed on the side plate 7 on the cooling pool 31. In this embodiment, the first power element 51 is a motor, and the output shaft of the motor passes through the side plate 7, and the setting direction is perpendicular to the moving direction of the plastic strip. The upper roller 52 is rotatably installed on the side plate 7 and is fixedly connected to the output shaft of the motor. The motor is used to drive the upper roller 52 to rotate; the lower roller 53 is also rotatably installed on the side plate 7, located directly below the upper roller 52, and between the upper roller 52 and the lower roller There is a certain gap between the upper roller 52 and the lower roller 53, and the plastic strip passes through the gap. In order to improve the transmission efficiency of the upper roller 52 and the lower roller 53, a first gear 8 is fixedly installed on the side of the upper roller 52 away from the motor, and a second gear 9 is fixedly installed on the side of the lower roller 53. The first gear 8 is meshed with the second gear 9. When the motor drives the upper roller 52 to rotate, due to the meshing transmission of the first gear 8 and the second gear 9, the lower roller 53 rotates synchronously with the upper roller 52. There is friction between the plastic strip and the upper roller 52 and the lower roller 53, so the plastic strip is pulled forward. When the upper roller 52 and the lower roller 53 pull the plastic strip, the plastic strip is in a straight state and immersed in the cooling pool 31, reducing the possibility of bending and deformation of the plastic strip during the cooling process. In other embodiments, a power element with output torque such as a rotary cylinder or a pneumatic motor can also be selected instead of the motor to drive the upper roller 52 to rotate. The specific scheme is not repeated here.

[0035] refer to Figure 1 After water cooling and shaping, the surface of the plastic strip is covered with water, which affects the subsequent pelletizing operation. Therefore, a water blowing assembly 4 is provided and installed on the side plate 7. Specifically, the water blowing assembly 4 includes an external air source 41, an air pipe 42 and an air nozzle 43. The external air source 41 is installed on the outer side of the side plate 7 to provide dry gas. A support rod is fixedly installed between the side plates 7. A support sheet is fixedly installed on the support rod. A long hole is opened on the support sheet. The air nozzle 43 is installed in the long hole on the support sheet and can be adjusted in position in the long hole. One end of the air pipe 42 is fixed to the external air source 41. The plastic strip is connected to the air nozzle 43 at one end, and the other end is fixedly connected to the air nozzle 43. The dry gas is transported to the air nozzle 43 through the air pipe 42, and the air nozzle 43 sprays the dry gas in a concentrated manner. In order to make the moving path of the plastic strip coincide with the blowing range of the air nozzle 43, a steering roller 10 is also rotatably installed on the side plate 7. The steering roller 10, the air nozzle 43, and the gap between the upper roller 52 and the lower roller 53 are located at the same height. The plastic strip passes under the driving roller 32 and then abuts against the top of the steering roller 10. At this time, the plastic strip and the air nozzle 43 are located at the same height. The air nozzle 43 is aimed at the plastic strip to dry the water on the surface of the plastic strip.

[0036] It should be particularly noted that the air nozzles 43 can be provided in multiple groups, such as two groups, three groups or more than three groups. In the present embodiment, four groups of air nozzles 43 are provided, which are symmetrically arranged on both sides of the plastic strip. Correspondingly, four groups of support sheets are also provided. After air is blown by the four groups of air nozzles 43, the water on the surface of the plastic strip is blown dry. In other embodiments, the number of air nozzles 43 can be adjusted according to on-site production conditions.

[0037] refer to Figure 1 and Figure 2 After the water on the surface of the plastic strip is dried, pelletizing can be carried out. In order to facilitate the collection of the cut plastic pellets, a receiving hopper 11 is provided. Specifically, the receiving hopper 11 is tilted and fixedly installed on one end of the cooling pool 31, adjacent to the traction component 5. The plastic strip is pulled directly into the receiving hopper 11. The pelletizing component 6 is installed on the receiving hopper 11 to cut the plastic strip into a plurality of plastic pellets. The plastic pellets slide from the receiving hopper 11 into the collection box 12 located below the receiving hopper 11.

[0038] Specifically, the pelletizing assembly 6 includes a second power element 61 and a cutter 62, wherein the second power element 61 is fixedly mounted on the receiving hopper 11, and the cutter 62 is fixedly mounted on the second power element 61. In this embodiment, the second power element 61 is a telescopic cylinder, and the telescopic rod of the telescopic cylinder can extend toward the plastic strip in the receiving hopper 11. The cutter 62 is fixedly mounted on the telescopic rod of the telescopic cylinder, and the telescopic cylinder drives the cutter 62 to cut the plastic strip into a plurality of plastic pellets. In other embodiments, a power element with a linear reciprocating motion output such as a piston or a screw motor can be selected to replace the telescopic cylinder to drive the cutter 62 to move, and its specific solution is not repeated here.

[0039] The implementation principle of a plastic extrusion pelletizer in an embodiment of the present application is as follows: a water cooling mechanism 3 is installed on a frame 1, adjacent to an extruder 2, a traction assembly 5 is installed on the water cooling mechanism 3, and pulls the plastic strip so that the plastic strip is straightened and shaped in the water cooling mechanism 3.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A plastic extrusion pelletizer, characterized in that: include Rack (1); An extruder (2), adjacent to the frame (1), for extruding plastic strips; A water cooling mechanism (3), arranged on the frame (1) and adjacent to the extruder (2), for cooling the shaped plastic strip; A traction assembly (5) is arranged on the water cooling mechanism (3) and is used to pull the plastic strip to be straightened, shaped and moved in the water cooling mechanism (3); and a pelletizing assembly (6), adjacent to the traction assembly (5), for pelletizing the plastic strips; The water cooling mechanism (3) comprises A cooling pool (31) is fixedly arranged on the frame (1), and the cooling pool (31) is filled with cold water; and a transmission roller (32) rotatably disposed in the cooling pool (31), the plastic strip abutting against the transmission roller (32); It also includes a receiving hopper (11), the receiving hopper (11) is tilted and fixedly mounted on one end of the cooling pool (31), and the pelletizing assembly (6) is arranged on the receiving hopper (11); It also includes a water blowing component (4), which is arranged on the cooling pool (31) and adjacent to the traction component (5) and is used to blow away water on the surface of the plastic strip; The water blowing assembly (4) comprises An external gas source (41), arranged on the cooling pool (31), for providing dry gas; An air pipe (42), one end of which is fixedly connected to the external air source (41); and an air nozzle (43) arranged on the cooling pool (31); the other end of the air pipe (42) is fixedly connected to the air nozzle (43); the air pipe (42) is used to transmit the gas to the air nozzle (43); and the air nozzle (43) is used to spray the gas in a concentrated manner.

2. A plastic extrusion pelletizer according to claim 1, characterized in that: The traction assembly (5) comprises a first power element (51) fixedly arranged on the cooling pool (31) and used for outputting power; an upper roller (52) rotatably disposed on the cooling pool (31) and fixedly connected to the first power element (51), wherein the first power element (51) is used to drive the upper roller (52) to rotate; and a lower roller (53) rotatably arranged on the cooling pool (31) with a gap between the lower roller (53) and the upper roller (52). The plastic strip passes through the gap and abuts against the upper roller (52) and the lower roller (53).

3. A plastic extrusion pelletizer according to claim 2, characterized in that: The pelletizing assembly (6) comprises a second power element (61) fixedly arranged on the receiving hopper (11) and used for outputting power; and a cutter (62) fixedly arranged on the second power element (61) for cutting the plastic strip.

4. A plastic extrusion pelletizer according to claim 3, characterized in that: The air nozzle (43) is adjustably arranged on the cooling pool (31) and its position relative to the plastic strip can be adjusted.

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