A pretreatment device for granulation of recycled polyester products

Abstract

This utility model discloses a pretreatment device for granulation of recycled polyester products, comprising a frame, a conveyor shell, a first conveying unit, a second conveying unit, and a mixing unit. The conveyor shell is mounted on the frame, with an inlet at one end and an outlet at the other, the inlet being higher than the outlet. The first conveying unit, the second conveying unit, and the mixing unit are sequentially installed inside the conveyor shell in the feeding direction, with the inlet of the mixing unit located below the outlet of the second conveying unit. The mixing unit has an auxiliary agent inlet communicating with it. This pretreatment device enables the mixing of recycled polyester and auxiliary agents, facilitates feeding, and improves pretreatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of recycled polyester product technology, specifically to a pretreatment device for granulation of recycled polyester products. Background Technology

[0002] With the deepening of global sustainable development, the recycling of recycled polyester materials has become an important development direction for the plastics processing industry. The application of recycled polyester in textiles, packaging, and other fields is growing rapidly. Recycled polyester raw materials typically come from waste PET bottle flakes and films. Their physical properties (such as melt viscosity and crystallinity) are significantly lower than virgin polyester due to degradation. Therefore, in the production process of recycled polyester products, the pretreatment stage is a crucial step determining the quality and efficiency of subsequent granulation. Its core task is to modify the performance of recycled polyester products, which requires the addition of chain extenders, toughening agents, and other additives to improve processability. Therefore, there is an urgent need for pretreatment equipment that can mix recycled polyester products with additives to facilitate subsequent granulation. Utility Model Content

[0003] The purpose of this invention is to overcome the defects in the prior art and provide a pretreatment device for granulation of recycled polyester products, which can effectively solve the above-mentioned problems in the prior art.

[0004] To achieve the above objectives, the technical solution of this utility model is to design a pretreatment device for granulation of recycled polyester products, which includes a frame body, a transmission shell, a first transmission unit, a second transmission unit, and a mixing unit. The transmission shell is installed on the frame body, with an inlet at one end and an outlet at the other end, and the height of the inlet is higher than the height of the outlet. The first transmission unit, the second transmission unit, and the mixing unit are installed sequentially in the transmission shell according to the feeding direction, and the inlet end of the mixing unit is located below the outlet end of the second transmission unit. The mixing unit is provided with an auxiliary agent inlet that communicates with it.

[0005] Furthermore, the frame body includes a first frame, a second frame, and a connecting plate, with the first frame and the second frame connected by the connecting plate.

[0006] Furthermore, the first transmission unit includes a drive shaft, a driven shaft, a conveyor belt, and a first drive assembly. The drive shaft and the driven shaft are rotatably mounted inside the transmission housing. The conveyor belt is sleeved on the drive shaft and the driven shaft. One end of the drive shaft passes through the transmission housing and is connected to the first drive assembly.

[0007] Furthermore, a discharge port may be provided on the transmission shell below the conveyor belt.

[0008] Furthermore, the second transmission unit includes a rotating shaft, a fixed sleeve, a connecting block, a toggle block, and a second drive assembly. The rotating shaft is rotatably installed inside the transmission housing and passes through the transmission housing to connect with the second drive assembly. The fixed sleeve is sleeved and fixed on the rotating shaft. A plurality of toggle blocks are installed on the fixed sleeve through the connecting block. The end edge of the toggle block perpendicular to the rotation direction is the toggle end edge, and when the toggle end edge moves to the lowest end, the distance between it and the inner wall of the transmission housing is 1-2 cm.

[0009] Furthermore, the mixing unit includes a motor, a stirring shaft, stirring blades, and a fixed disk. The motor is mounted on the first frame, the stirring shaft is mounted inside the transmission housing, the lower end of the stirring shaft passes through the transmission housing and is connected to the motor, and the upper end of the stirring shaft is rotatably connected to the fixed disk. The fixed disk is fixed inside the transmission housing and has several openings. Several stirring blades are mounted on the stirring shaft.

[0010] Furthermore, the inner cavity of the transmission shell is composed of a first cavity, a second cavity, a third cavity, and a fourth cavity. One end of the first cavity is a feed inlet, and the other end of the first cavity is connected to the third cavity. The third cavity is adapted to the shape of the second transmission unit. The fourth cavity is connected to the third cavity and located below the third cavity. The lower end of the fourth cavity has a discharge port. The additive feed inlet is installed on the fourth cavity and is connected to the fourth cavity.

[0011] The second cavity is located below the first cavity and communicates with the first cavity, and a discharge port is provided at the lower end of the second cavity.

[0012] Furthermore, the first drive component and the second drive component have the same structure, and the first drive component consists of a first motor, a pulley and a belt.

[0013] Furthermore, a distance sensor is installed on the fixed plate.

[0014] The advantages and beneficial effects of this utility model are as follows:

[0015] (1) The raw material recycled polyester product enters the conveying shell through the feed inlet. The raw material is conveyed to the feed inlet of the second conveying unit through the first conveying unit, and then pushed into the mixing unit by the second conveying unit for stirring and mixing. The additives enter the mixing unit through the additive feed inlet. After stirring and mixing, the raw material and additive mixture is discharged through the discharge outlet. In addition, the mixing unit is equipped with a distance sensor. When the height of the raw material in the mixing unit reaches the preset value, the distance sensor issues an alarm. At the same time, the second conveying unit stops operating. Then, the additives are added into the mixing unit through the additive feed inlet. After the raw material and additives are stirred and mixed in the mixing unit, the mixture is discharged from the discharge outlet. Then, the first conveying unit and the second conveying unit are started again to allow the raw material to be mixed to enter the mixing unit for mixing. Through the setting of the first conveying unit and the second conveying unit of this utility model, the mixing of recycled polyester product and additives can be realized, thereby completing the pretreatment.

[0016] (2) The first cavity, the third cavity and the fourth cavity form a transverse L-shaped cavity structure; the raw material entering through the feed port can be continuously conveyed to the second conveying unit through the structure of the first cavity and the first conveying unit at the bottom of the first cavity. After being moved by the second conveying unit, the raw material enters the mixing unit. After being mixed by the mixing unit, the raw material is directly discharged. The whole process continues, which greatly improves the pretreatment efficiency of the raw material. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a pretreatment equipment for granulation of recycled polyester products according to the present invention;

[0018] Figure 2 yes Figure 1 Another structural diagram from a different angle;

[0019] Figure 3 This is a cross-sectional structural schematic diagram of a pretreatment device for granulation of recycled polyester products according to the present invention;

[0020] Figure 4 yes Figure 3 Another structural diagram from another angle.

[0021] In the diagram: Frame 1, First Frame 11, Second Frame 12, Connecting Plate 13, Transmission Shell 2, Inlet 21, Outlet 22, Discharge Port 23, First Cavity 24, Second Cavity 25, Third Cavity 26, Fourth Cavity 27, First Transmission Unit 3, Drive Shaft 31, Driven Shaft 32, Conveyor Belt 33, First Drive Assembly 34, Second Transmission Unit 4, Rotating Shaft 41, Fixed Sleeve 42, Connecting Block 43, Actuating Block 44, Actuating End Edge 441, Second Drive Assembly 45, Mixing Unit 5, Motor 51, Stirring Shaft 52, Stirring Blades 53, Fixed Disc 54, Additive Inlet 6. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0023] according to Figure 1-4 As shown, this utility model is a pretreatment device for granulation of recycled polyester products. It is characterized by comprising a frame body 1, a transmission shell 2, a first transmission unit 3, a second transmission unit 4, and a mixing unit 5. The transmission shell 2 is mounted on the frame body 1. One end of the transmission shell 2 has a feed inlet 21, and the other end has a discharge outlet 22, with the height of the feed inlet 21 being higher than the height of the discharge outlet 22. The first transmission unit 3, the second transmission unit 4, and the mixing unit 5 are sequentially installed inside the transmission shell 2 in the feeding direction, with the feed inlet end of the mixing unit 5 located below the discharge end of the second transmission unit 4. The mixing unit 5 is provided with an auxiliary agent feed inlet 6 communicating with it.

[0024] In the above technical solutions, such as Figure 1-2 As shown, the raw material recycled polyester product enters the conveyor shell 2 through the feed inlet 21. The raw material is conveyed by the first conveyor unit to the feed inlet of the second conveyor unit, and then pushed by the second conveyor unit into the mixing unit for stirring and mixing. The additives enter the mixing unit through the additive feed inlet. After stirring and mixing, the raw material and additive mixture is discharged through the discharge outlet 22. In addition, the mixing unit is equipped with a distance sensor. When the height of the raw material in the mixing unit reaches a preset value, the distance sensor issues an alarm, and the second conveyor unit stops operating. Then, the additives are added to the mixing unit through the additive feed inlet. This can be done manually by directly adding the additives to the mixing unit through the additive feed inlet, or by other automatic addition methods. After the raw material and additives are stirred and mixed in the mixing unit, the mixture is discharged from the discharge outlet. Then, the first and second conveyor units are restarted to allow the raw material to be mixed to enter the mixing unit for mixing. Through the setting of the first and second conveyor units of this utility model, the mixing of recycled polyester product and additives can be realized, thereby completing the pretreatment. Furthermore, the pretreatment process can be continuously carried out by setting up the first transmission unit, the second transmission unit, and the mixing unit.

[0025] As a preferred embodiment of the above technical solution, such as Figure 2 As shown, the frame body 1 includes a first frame 11, a second frame 12, and a connecting plate 13. The first frame 11 and the second frame 12 are connected by the connecting plate 13.

[0026] In this embodiment, as Figure 3-4As shown, the first transmission unit 3 includes a drive shaft 31, a driven shaft 32, a conveyor belt 33, and a first drive assembly 34. The drive shaft 31 and the driven shaft 32 are rotatably mounted inside the transmission housing 2. The conveyor belt 33 is sleeved on the drive shaft 31 and the driven shaft 32. One end of the drive shaft 31 passes through the transmission housing 2 and connects to the first drive assembly 34. The conveyor belt facilitates the transport of raw materials to the second transmission unit for further processing.

[0027] Furthermore, in the above embodiments, a discharge port 23 may be provided on the transmission shell 2 below the conveyor belt 33 so that dust and other materials in the raw materials passing through the conveyor belt can be discharged directly through the discharge port below, avoiding accumulation below the conveyor belt that cannot be cleaned.

[0028] As a preferred embodiment of the above technical solution, such as Figure 3 and 4 As shown, the second conveying unit 4 includes a rotating shaft 41, a fixed sleeve 42, a connecting block 43, a toggle block 44, and a second driving assembly 45. The rotating shaft 41 is rotatably installed inside the conveying shell 2. The rotating shaft 41 passes through the conveying shell 2 and is connected to the second driving assembly 45. The fixed sleeve 42 is sleeved and fixed on the rotating shaft 41. A plurality of toggle blocks 44 are installed on the fixed sleeve 42 through the connecting block 43. The end edge of the toggle block 44 perpendicular to the rotation direction is the toggle end edge 441. When the toggle end edge moves to the lowest end, the distance between it and the inner wall of the conveying shell 2 is 0.1-1cm. This setting facilitates the feeding of raw materials into the mixing unit through the toggle blocks.

[0029] In the above technical solution, the raw material enters the mixing unit for mixing via the agitator end edge on the agitator block. When the agitator end edge moves to its lowest point, the distance between it and the inner wall of the transmission shell 2 is set to 0.1-1cm, which ensures that the raw material is agitated into the mixing unit via the agitator block.

[0030] As a preferred embodiment of the above technical solution, the mixing unit 5 includes a motor 51, a stirring shaft 52, stirring blades 53, and a fixed disk 54. The motor 51 is mounted on the first frame 11, the stirring shaft 52 is mounted inside the transmission shell 2, the lower end of the stirring shaft 52 passes through the transmission shell 2 and is connected to the motor 51, and the upper end of the stirring shaft 52 is rotatably connected to the fixed disk 54. The fixed disk 54 is fixed inside the transmission shell 2 and has several openings. Several stirring blades 53 are mounted on the stirring shaft 52.

[0031] As a preferred embodiment of the above technical solution, such as Figure 3 and 4As shown, the inner cavity of the transmission shell 2 is composed of a first cavity 24, a second cavity 25, a third cavity 26, and a fourth cavity 27. One end of the first cavity 24 is a feed inlet 21, and the other end of the first cavity 24 is connected to the third cavity 26. The third cavity 26 is adapted to the shape of the second transmission unit 4. The fourth cavity 27 is connected to the third cavity 26 and is located below the third cavity 26. The lower end of the fourth cavity 27 has a discharge port 22. The additive feed inlet 6 is installed on the fourth cavity 27 and is connected to the fourth cavity.

[0032] The second cavity 25 is located below the first cavity 24 and communicates with the first cavity 24. The lower end of the second cavity 25 is provided with a discharge port 23.

[0033] In the above technical solution, the first cavity 24, the third cavity 26 and the fourth cavity 27 constitute a transverse L-shaped cavity structure; the raw material entering through the feed port can be continuously conveyed to the second conveying unit through the structural setting of the first cavity and the first conveying unit at the bottom of the first cavity. After passing through the second conveying unit, the raw material is directly discharged after being mixed by the mixing unit. The entire recycling process continues, which greatly improves the pretreatment efficiency of the raw material.

[0034] As a preferred embodiment of the above technical solution, the first drive component 34 and the second drive component 45 have the same structure, and the first drive component consists of a first motor, a pulley and a belt.

[0035] like Figure 1-4 The first drive assembly 34 and the second drive assembly 45 are both composed of a first motor, a pulley and a belt, and drive the first transmission unit and the second transmission unit to work through the first motor, the pulley and the belt.

[0036] The fixed plate is equipped with a distance sensor, which ensures that the recycled polyester product in the mixing unit is at the same height in each mixing unit, and allows for the addition of an appropriate amount of additives.

[0037] The above description is only a preferred embodiment of the present utility model. 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 utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pretreatment device for granulation of recycled polyester products, characterized in that, It includes a frame body (1), a transmission shell (2), a first transmission unit (3), a second transmission unit (4), and a mixing unit (5). The transmission shell (2) is installed on the frame body (1). One end of the transmission shell (2) is provided with a feed inlet (21), and the other end is provided with a discharge outlet (22). The height of the feed inlet (21) is higher than the height of the discharge outlet (22). The first transmission unit (3), the second transmission unit (4), and the mixing unit (5) are installed in the transmission shell (2) in sequence according to the feeding direction. The feed inlet end of the mixing unit (5) is located below the discharge end of the second transmission unit (4). The mixing unit (5) is provided with an auxiliary agent feed inlet (6) that communicates with it.

2. The pretreatment equipment for granulation of recycled polyester products according to claim 1, characterized in that, The frame body (1) includes a first frame (11), a second frame (12), and a connecting plate (13), wherein the first frame (11) and the second frame (12) are connected by the connecting plate (13).

3. The pretreatment equipment for granulation of recycled polyester products according to claim 2, characterized in that, The first transmission unit (3) includes a drive shaft (31), a driven shaft (32), a conveyor belt (33) and a first drive assembly (34). The drive shaft (31) and the driven shaft (32) are rotatably mounted inside the transmission housing (2). The conveyor belt (33) is sleeved on the drive shaft (31) and the driven shaft (32). One end of the drive shaft (31) passes through the transmission housing (2) and is connected to the first drive assembly (34).

4. The pretreatment equipment for granulation of recycled polyester products according to claim 3, characterized in that, A discharge port (23) may be provided on the transmission shell (2) below the conveyor belt (33).

5. The pretreatment equipment for granulation of recycled polyester products according to claim 4, characterized in that, The second transmission unit (4) includes a rotating shaft (41), a fixed sleeve (42), a connecting block (43), a toggle block (44), and a second drive assembly (45). The rotating shaft (41) is rotatably installed inside the transmission housing (2). The rotating shaft (41) passes through the transmission housing (2) and is connected to the second drive assembly (45). The fixed sleeve (42) is sleeved and fixed on the rotating shaft (41). Several toggle blocks (44) are installed on the fixed sleeve (42) through the connecting block (43). The end edge of the toggle block (44) perpendicular to the rotation direction is the toggle end edge (441), and the distance between the toggle end edge and the inner wall of the transmission housing (2) when the toggle end edge moves to the lowest end is 1-2 cm.

6. The pretreatment equipment for granulation of recycled polyester products according to claim 5, characterized in that, The mixing unit (5) includes a motor (51), a stirring shaft (52), stirring blades (53), and a fixed disk (54). The motor (51) is mounted on the first frame (11). The stirring shaft (52) is mounted inside the transmission shell (2). The lower end of the stirring shaft (52) passes through the transmission shell (2) and is connected to the motor (51). The upper end of the stirring shaft (52) is rotatably connected to the fixed disk (54). The fixed disk (54) is fixed inside the transmission shell (2). The fixed disk (54) has several openings. Several stirring blades (53) are mounted on the stirring shaft (52).

7. The pretreatment equipment for granulation of recycled polyester products according to claim 6, characterized in that, The inner cavity of the transmission shell (2) is composed of a first cavity (24), a second cavity (25), a third cavity (26) and a fourth cavity (27). One end of the first cavity (24) is a feed inlet (21), and the other end of the first cavity (24) is connected to the third cavity (26). The third cavity (26) is adapted to the shape of the second transmission unit (4). The fourth cavity (27) is connected to the third cavity (26) and located below the third cavity (26). The lower end of the fourth cavity (27) is provided with a discharge port (22). The additive feed inlet (6) is installed on the fourth cavity and is connected to the fourth cavity. The second cavity (25) is located below the first cavity (24) and communicates with the first cavity (24). The lower end of the second cavity (25) is provided with a discharge port (23).

8. The pretreatment equipment for granulation of recycled polyester products according to claim 6, characterized in that, The first driving component (34) and the second driving component (45) have the same structure.

9. The pretreatment equipment for granulation of recycled polyester products according to claim 6, characterized in that, A distance sensor is installed on the fixed plate (54).

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