Production device for PET (Polyethylene Terephthalate) bottle flakes

Abstract

The utility model discloses a production device for PET (Polyethylene Terephthalate) bottle flakes, which comprises a rack, a speed reducer arranged on the rack, a machine barrel arranged at one end of the speed reducer and a screw rod rotationally arranged in the machine barrel, the screw rod is in transmission connection with the speed reducer, and the length-diameter ratio of the screw rod is set to be 28. The production device further comprises a cold water jacket arranged on the machine barrel in a communicating mode, a first heat preservation cover, a second heat preservation cover, a measuring head, a heat dissipation net and a cooling assembly, wherein the first heat preservation cover and the second heat preservation cover are arranged on the top of the rack, and the second heat preservation cover and the first heat preservation cover are located on the same central horizontal line. One end, far away from the speed reducer, of the cylinder penetrates through the first heat-insulating cover and the second heat-insulating cover and then is connected with the measuring head; the heat dissipation net is far away from the first heat preservation cover. The plasticizing effect and the plasticizing efficiency of the screw on materials are improved, cooling gas can exchange heat with the machine barrel more intensively, heat generated by the machine barrel is taken away quickly, and overtemperature is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of PET bottle flake production equipment, and in particular to a production device for PET bottle flakes. Background Art

[0002] PET (polyethylene terephthalate) flakes are a key raw material in the production of various plastic products, widely used in beverage bottles, fibers, films, and other fields. The PET flake production process typically includes steps such as material pretreatment, melting, plasticization, and cooling. To ensure production efficiency and product quality, PET flake production equipment must possess efficient plasticization, mixing, and cooling functions.

[0003] Currently, traditional PET bottle flake production equipment typically uses a 180 / 25 screw. The 180 / 25 screw is relatively short, and the material residence time in the screw is relatively short, resulting in insufficient plasticization and affecting product quality. At the same time, the shorter screw cannot provide sufficient mixing time, resulting in uneven material mixing and affecting the performance of the final product. In addition, the cooling effect of traditional PET bottle flake production equipment is poor, which reduces the quality of the finished product. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of this application is to provide a production device for PET bottle flakes.

[0005] To achieve the above-mentioned object, the present application adopts the following technical solution: a production device for PET bottle flakes, comprising a frame, a reducer disposed on the frame, a barrel disposed at one end of the reducer, and a screw rotatably disposed in the barrel, the screw being transmission-connected to the reducer, the aspect ratio of the screw being set to 28, and the production device further comprising:

[0006] a cold water jacket, connected and arranged on the barrel;

[0007] A first heat-insulating cover is arranged on the top of the frame;

[0008] A second heat-insulating cover is provided on the top of the frame and is located on the same central horizontal line as the first heat-insulating cover;

[0009] A measuring head is provided on the second heat-insulating cover; an end of the barrel away from the reducer passes through the first heat-insulating cover and the second heat-insulating cover respectively, and is connected to the measuring head;

[0010] a heat dissipation net, provided on the second heat-insulating cover and arranged away from the first heat-insulating cover; and

[0011] The cooling component is arranged on the second heat-insulating cover.

[0012] In the above technical solution, it is further preferred that a notch is opened in the barrel, and the notch is located below the cold water jacket.

[0013] In the above technical solution, it is further preferred that the cooling assembly includes: two groups of mounting holes, two groups of blowing hoods and two groups of cooling fans, the two groups of mounting holes are opened at the bottom of the second heat-insulating cover; one end of each of the blowing hoods is arranged in the second heat-insulating cover, and the other end passes through one of the mounting holes, and the bottom of each of the blowing hoods matches the mounting hole; the two groups of cooling fans are arranged at the bottom of the second heat-insulating cover, and the delivery end of the cooling fan is connected to the blowing hood.

[0014] In the above technical solution, it is further preferred that it further includes: a plurality of support frames, which are respectively arranged in the first heat-insulating cover and the second heat-insulating cover to fix the barrel.

[0015] In the above technical solution, it is further preferred that it further includes: a belt cover, which is arranged at the other end of the reducer.

[0016] Compared with the prior art, this application achieves the following beneficial effects:

[0017] The screw has a suitable aspect ratio, which increases the residence time of the material on the screw and the compression ratio of the screw, thereby improving the plasticizing effect and efficiency of the screw on the material; the heat dissipation network and cooling components form a directional heat dissipation channel on the outer wall of the barrel, which allows the cooling gas to exchange heat with the barrel more concentratedly, quickly taking away the heat generated by the barrel, avoiding overheating, and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of a production device for PET bottle flakes provided in an embodiment of the present application;

[0019] Figure 2 for Figure 1 A schematic structural diagram of the first heat-insulating cover and the second heat-insulating cover;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the barrel;

[0021] Figure 4 for Figure 1 A top view of the cold water jacket;

[0022] Figure 5 for Figure 1 Schematic diagram of the structure of the screw;

[0023] Figure 6 for Figure 1 Schematic diagram of the position of the notch on the barrel.

[0024] Among them: 1. Frame; 2. Belt cover; 3. Reducer; 4. First insulation cover; 5. Second insulation cover; 6. Measuring head; 7. Barrel; 8. Cold water jacket; 9. Support frame; 10. Cooling assembly; 11. Heat dissipation net; 12. Screw; 71. Notch; 101. Blowing cover; 102. Cooling fan; 103. Mounting hole. DETAILED DESCRIPTION

[0025] In order to describe the technical content, structural features, achieved purposes and effects of the application in detail, the technical solutions in the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all of the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but are not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0026] like Figure 1 As shown, an embodiment of the present invention provides a production device for PET bottle flakes, including: a frame 1, a reducer 3 and a barrel 7 arranged on the frame 1, and a screw 12 rotatably arranged in the barrel 7, the screw 12 is connected to the output end of the reducer 3, and thus rotates around its own axis under the drive of the reducer 3.

[0027] like Figure 1 、 5 As shown, the aspect ratio of the screw 12 is set to 28. In this application, the screw 12 is lengthened and the compression ratio is increased, so that the residence time of the material on the screw is increased. Under the driving action of the screw rotation, the material has more mixing time, and materials of different components can contact and diffuse with each other more comprehensively, thereby making the mixing of the materials more uniform. The compression process of the material on the screw will be more sufficient, and the shear force and extrusion force it is subjected to will also increase accordingly, which is helpful to improve the plasticizing effect of the material. In addition, the larger size of the screw 12 means that there is more space in the barrel 7 to accommodate the material, thereby improving the output and production efficiency of the production device.

[0028] like Figure 1 、 3As shown in Figures 4 and 6, a cold water jacket 8 is provided on the barrel 7, and a notch 71 is provided in the barrel 7, and the notch 71 is located below the cold water jacket 8. The cold water jacket 8 is located on the outer ring of the feed port of the barrel 7. The main function of the cold water jacket 8 is to regulate the temperature near the feed port by circulating cold water to prevent the material from melting prematurely or being heated unevenly before entering the barrel 7. The cold water jacket 8 on the feed port has good sealing performance. The specific design is that the inner layer is a material channel and the outer layer is a jacket for cooling water to pass through. In this application, the size of the feed port is improved to 300×200, and the feed port is enlarged to increase the feed amount. The notch 71 on the barrel 7 can allow more material to enter the barrel 7, reduce the situation where the feed is blocked or the feed amount is limited, so that the material can be more evenly distributed in the barrel 7, and at the same time reduce the feed resistance, so that the material can enter the barrel 7 more smoothly.

[0029] like Figure 1 、 2 As shown, a first heat-insulating cover 4 and a second heat-insulating cover 5 are further provided on the outside of the barrel 7. Both the first heat-insulating cover 4 and the second heat-insulating cover 5 are arranged on the top of the frame 1, and the first heat-insulating cover 4 and the second heat-insulating cover 5 are located on the same central horizontal line and are arranged in sequence front to back along the extension direction of the barrel 7. A measuring head 6 is also provided on the second heat-insulating cover 5. One end of the barrel 7 is connected to the reducer 3, and the other end passes through the first heat-insulating cover 4 and the second heat-insulating cover 5 respectively and is connected to the measuring head 6.

[0030] The measuring head 6 can monitor various characteristics of the material in real time. For example, it can measure key parameters of the material such as temperature, pressure, viscosity, etc. By monitoring the temperature, it can ensure that the material reacts and processes within the appropriate temperature range, avoiding the impact of high or low temperature on product quality. The pressure measurement helps to determine whether the flow state of the material in the barrel 7 is normal, preventing excessive pressure from causing damage to the equipment or excessive pressure from affecting the mixing and plasticizing effect of the material. The monitoring of viscosity can reflect the molecular chain state and the degree of mixing uniformity of the material.

[0031] A heat sink 11 and a cooling assembly 10 are provided on the second heat-insulating cover 5. The heat sink 11 is located away from the first heat-insulating cover 4. The heat sink 11 effectively dissipates heat generated during the production process. In this production apparatus, operations such as material processing within the barrel 7 generate heat. The heat sink 11 exchanges heat with the surrounding environment through its large surface area. Heat is transferred from the hot barrel 7 and internal components to the heat sink 11, and then dissipated into the surrounding air, thereby reducing the temperature of the equipment and preventing problems such as performance degradation or damage due to overheating.

[0032] The cooling assembly 10 includes two groups of mounting holes 103, two groups of blowing hoods 101, and two groups of cooling fans 102. The two groups of mounting holes 103 are provided at the bottom of the second heat-insulating cover 5. One end of each blowing hood 101 is provided inside the second heat-insulating cover 5, and the other end extends to the outside of the second heat-insulating cover 5 through a mounting hole 103. The bottom of each blowing hood 101 is configured to match the mounting hole 103. The two groups of cooling fans 102 are provided at the bottom of the second heat-insulating cover 5, and the delivery ends of the cooling fans 102 are connected to the blowing hoods 101. By adjusting the operating parameters of the cooling fans 102, such as the rotational speed and air volume, the gas flow rate and speed blown to the barrel 7 can be controlled, thereby accurately adjusting the temperature of the barrel 7.

[0033] Multiple support frames 9 are also disposed within the first and second insulation covers 4, 5. These support frames 9 are used to secure the barrel 7. These support frames 9 prevent the barrel 7 from shaking or shifting during operation, ensuring that the axial position of the barrel 7 remains unchanged, thereby improving the stability of the production apparatus. For example, when the screw 12 rotates at high speed within the barrel 7, it generates a certain amount of vibration and centrifugal force. To prevent this displacement and affect the normal processing of the material, the bottom of the support frames 9 can be bolted to the frame 1.

[0034] like Figure 1 As shown, a belt cover 2 is also provided on the side of the reducer 3 away from the barrel 7. During the operation of the equipment, the belt is in a high-speed running state. The setting of the belt cover 2 can effectively prevent the operator from accidentally touching the running belt, avoiding safety accidents such as fingers being caught in the belt, thereby ensuring the personal safety of the operator and the stability of the equipment operation.

[0035] The technical solution provided by the present invention uses an external controller to start the reducer 3 to drive the screw 12 to rotate, and the material enters the barrel 7 through the feed port. Under the push of the screw 12, the material is continuously mixed, compressed and plasticized during the movement in the barrel 7. The cooling fan 102 is started by the external controller, and the barrel 7 is blown and cooled through the blowing hood 101. When the material reaches the end of the barrel 7, the material is detected by the measuring head 6 and the material is discharged.

[0036] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and descriptions are only for illustrative purposes. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. The scope of protection claimed in the present application is defined by the appended claims, the description and their equivalents.

Claims

1. A production device for PET bottle flakes, comprising a frame (1), a reducer (3) arranged on the frame (1), a barrel (7) arranged at one end of the reducer (3), and a screw (12) rotatably arranged in the barrel (7), wherein the screw (12) is in transmission connection with the reducer (3), and is characterized in that: The aspect ratio of the screw (12) is set to 28, and the production device further includes: A cold water jacket (8) is connected to and arranged on the barrel (7); A first heat-insulating cover (4) is arranged on the top of the frame (1); A second heat-insulating cover (5) is arranged on the top of the frame (1) and is located on the same central horizontal line as the first heat-insulating cover (4); A measuring head (6) is provided on the second heat-insulating cover (5); an end of the barrel (7) away from the reducer (3) passes through the first heat-insulating cover (4) and the second heat-insulating cover (5), and is connected to the measuring head (6); a heat dissipation net (11), arranged on the second heat-insulating cover (5) and arranged away from the first heat-insulating cover (4); and A cooling assembly (10) is arranged on the second heat-insulating cover (5).

2. The production device for PET bottle flakes according to claim 1, characterized in that: A notch (71) is provided in the barrel (7), and the notch (71) is located below the cold water jacket (8).

3. The production device for PET bottle flakes according to claim 1, characterized in that: The cooling assembly (10) comprises: two groups of mounting holes (103), two groups of blowing hoods (101) and two groups of cooling fans (102), wherein the two groups of mounting holes (103) are provided at the bottom of the second heat-insulating cover (5); one end of each of the blowing hoods (101) is provided in the second heat-insulating cover (5), and the other end passes through one of the mounting holes (103), and the bottom of each of the blowing hoods (101) matches the mounting hole (103); the two groups of cooling fans (102) are provided at the bottom of the second heat-insulating cover (5), and the delivery end of the cooling fan (102) is connected to the blowing hood (101).

4. The production device for PET bottle flakes according to claim 1, characterized in that: Also includes: A plurality of support frames (9), the plurality of support frames (9) being respectively arranged in the first heat-insulating cover (4) and the second heat-insulating cover (5), and being used to fix the barrel (7).

5. The production device for PET bottle flakes according to claim 1, characterized in that: Also includes: A belt cover (2) is provided at the other end of the reducer (3).

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