Multi-stage exhaust type plastic machine charging barrel

Abstract

The utility model is suitable for the technical field of plastic machines, and provides a multi-stage exhaust type plastic machine charging barrel which comprises a charging barrel body, a cavity is formed in the charging barrel body, a screw rod is arranged in the cavity, a flange is arranged at one end of the charging barrel body in a sleeved mode, a nozzle is installed on the flange, and the nozzle is communicated with the interior of the charging barrel body through the flange. Exhaust mechanisms are arranged on the charging barrel and the nozzle; the exhaust mechanisms are mounted on the charging barrel and the nozzle, so that when plastic raw materials are fed and compressed by the screw, part of moisture and gas in the raw materials are atomized and discharged from the exhaust mechanisms arranged on the charging barrel and the nozzle, and through a multi-stage exhaust mode, the effective exhaust and dehumidification functions can be achieved under the action of rapid glue injection and sol without drying the materials; and the defects that in an original structure, due to the fact that the temperature is too high and the sol back pressure is too large, the exhaust hole leaks materials, and due to dead corners of the exhaust hole of the charging barrel or too long adhesion time, disintegration black spots and other chromatic aberration are caused are overcome.

Description

Technical Field

[0001] This utility model relates to the field of plastic machinery technology, and in particular to a multi-stage venting plastic machinery barrel. Background Technology

[0002] After decades of development, the plastics machinery industry has developed some exhaust-type barrels and related auxiliary machines to achieve the function of exhausting and dehumidifying plastics.

[0003] However, due to the previous limitation of opening the venting structure after the plastic melts, in actual use, the plastic compression reaction force and thrust, temperature and other factors during the melting process often cause the venting port to overflow, which causes certain problems in production, as well as the loss of some raw materials and unstable working conditions. Utility Model Content

[0004] This utility model provides a multi-stage venting plastic machine barrel, which aims to solve the problem that in actual use, the plastic compression reaction force and thrust, temperature and other factors during melting will cause the vent to overflow easily, which will cause certain troubles to production, as well as the loss of some raw materials and unstable working conditions.

[0005] This utility model is implemented as follows: a multi-stage venting plastic machine barrel includes a barrel with an internal cavity. A screw is installed inside the cavity. A flange is fitted at one end of the barrel, and a nozzle is installed on the flange. The nozzle and the inside of the barrel are connected through the flange. Both the barrel and the nozzle are equipped with venting mechanisms.

[0006] The beneficial effects of adopting the above-mentioned further solution are: to achieve effective venting and dehumidification functions without drying the material during rapid injection and sol-gel action, and to avoid defects such as material leakage from the venting holes caused by excessive temperature and excessive sol back pressure in the original structure, as well as color differences such as decomposition black spots caused by dead corners of the venting holes in the barrel or excessive adhesion time.

[0007] Preferably, the exhaust mechanism is provided in four sets, one set is installed on the nozzle, and the other three sets are installed on the material cylinder in sequence.

[0008] The beneficial effect of adopting the above-mentioned further solution is that, depending on the material or usage state during actual production, different amounts of atomized water and gas will be discharged when passing through each filtration section.

[0009] Preferably, the venting mechanism includes: a venting steel, which is disposed inside the material cylinder, and a venting support column is disposed around the outer side wall of the venting steel, and a venting hole is provided above the venting support column of the material cylinder.

[0010] The beneficial effect of adopting the above-mentioned further solution is that it facilitates the atomization of some of the moisture and gas in the raw material, which overflows from the gap in the exhaust steel and is then discharged through the space of multiple exhaust support columns towards the exhaust hole on the barrel.

[0011] Preferably, the screw includes a screw front end and a screw rear end, the screw front end and the screw rear end are integrally formed, and the screw front end is located on the side close to the nozzle.

[0012] The beneficial effect of adopting the above-mentioned further solution is that it facilitates the feeding of raw materials.

[0013] Preferably, the barrel is provided with temperature sensing holes, and there are several temperature sensing holes. The location and number of temperature sensing holes vary depending on the size of the barrel.

[0014] The advantages of adopting the above-mentioned further solution are: it is used to detect the temperature inside the barrel, which facilitates the operation of the control device.

[0015] Preferably, the barrel is provided with a discharge port, which is located at the tail end 22 of the screw.

[0016] The advantages of adopting the above-mentioned further solution are: it facilitates the feeding of materials into the barrel and ensures the normal operation of the device.

[0017] Preferably, the rear end of the screw opposite to the front end of the screw is provided with a screw shank.

[0018] The advantages of adopting the above-mentioned further solution are: it facilitates connection with an external drive device, provides power to the screw, and ensures the normal operation of the device.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a multi-stage venting plastic machine barrel. By installing venting mechanisms on the barrel and nozzle, when the plastic raw material is compressed by the screw, some of the moisture and gas in the raw material are atomized and discharged from the venting mechanisms on the barrel and nozzle. Through multi-stage venting, effective venting and dehumidification functions can be achieved without drying the material during rapid injection and melting. It also avoids defects such as material leakage from the venting holes caused by excessive temperature and excessive melt back pressure, as well as color differences such as decomposition black spots caused by dead corners in the barrel venting holes or prolonged adhesion time. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the AA section structure.

[0022] In the diagram: 1. Barrel; 2. Screw; 21. Screw front end; 22. Screw rear end; 23. Screw shank; 3. Flange; 4. Nozzle; 5. Feed port; 6. Exhaust mechanism; 61. Exhaust steel; 62. Exhaust support column; 63. Exhaust hole; 7. Temperature sensing hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] Please see Figure 1-2 This utility model provides a multi-stage venting plastic machine barrel technical solution: including a barrel 1, the inside of the barrel 1 is a cavity, a screw 2 is arranged in the cavity, a flange 3 is sleeved on one end of the barrel 1, a nozzle 4 is installed on the flange 3, the nozzle 4 and the inside of the barrel 1 are connected through the flange 3, and a venting mechanism 6 is provided on both the barrel 1 and the nozzle 4.

[0025] In this embodiment, by installing an exhaust mechanism 6 on the barrel 1 and the nozzle 4, when the plastic raw material is fed and compressed by the screw 2, some of the moisture and gas in the raw material are atomized and discharged from the exhaust mechanism 6 on the barrel 1 and the nozzle 4. Through the multi-stage exhaust method, effective exhaust and dehumidification functions can be achieved without drying the material during the rapid injection and melting process. This avoids the defects in the original structure, such as material overflow from the exhaust hole caused by excessive temperature and excessive back pressure of the melt, dead corners of the barrel exhaust hole, or decomposition black spots and other color differences caused by prolonged adhesion time.

[0026] Furthermore, the exhaust mechanism 6 is provided with four sets, one set is installed on the nozzle 4, and the other three sets are installed on the material cylinder 1 in sequence.

[0027] In this embodiment, four sets of exhaust mechanisms 6 are arranged sequentially on the nozzle 4 and the barrel 1. Three sets of exhaust mechanisms 6 are arranged sequentially at the front end, middle end and rear end of the barrel. All four sets of exhaust mechanisms 6 are structures for filtering gas and moisture. Depending on the material or usage state in actual production, different amounts of atomized moisture and gas will be discharged when passing through each filtration section.

[0028] Typically, the exhaust mechanism 6 includes an exhaust steel 61, which is disposed inside the material cylinder 1. An exhaust support column 62 is provided around the outer side wall of the exhaust steel 61, and an exhaust hole 63 is provided above the exhaust support column 62 in the material cylinder 1.

[0029] In this embodiment, each group of exhaust mechanisms 6 includes an exhaust steel 61, an exhaust support column 62, and an exhaust hole 63. When the plastic raw material is fed and compressed by the screw 2, some of the moisture and gas in the raw material become atomized and overflow from the gap in the exhaust steel 61. After being collected through the space of multiple exhaust support columns 62, it is discharged towards the exhaust hole 63 on the barrel 1. The specifications of the exhaust steel 61 in each group are different according to actual needs. This description is only a functional description. The size, shape, and number of the exhaust support columns 62 connected to the exhaust steel 61 may vary and be adjusted according to actual needs.

[0030] Specifically, the screw 2 includes a screw front end 21 and a screw rear end 22, which are integrally formed, with the screw front end 21 located on the side closer to the nozzle 4.

[0031] In this embodiment, the screw 2 includes a screw front end 21 and a screw rear end 22, wherein the feeding groove of the screw front end 21 is higher than the feeding groove of the screw rear end 22, which facilitates feeding of raw materials.

[0032] In addition, temperature sensing holes 7 are provided on the barrel 1. There are several temperature sensing holes 7, and the number of temperature sensing holes 7 varies depending on the size of the barrel.

[0033] In this embodiment, a temperature sensing hole 7 is provided on the material cylinder 1, and a temperature sensing element is provided inside the temperature sensing hole 7 to detect the temperature inside the material cylinder 1, which facilitates the operation of the control device.

[0034] In addition, a discharge port 5 is provided on the barrel 1, which is located at the tail end of the screw 22.

[0035] In this embodiment, by providing a discharge port 5 on the material cylinder 1, it is convenient to feed material into the material cylinder 1 and ensure that the device works normally.

[0036] It should be noted that a screw shank 23 is provided at the end of the screw rear end 22 that is away from the screw front end 21.

[0037] In this embodiment, by connecting the screw shank 23 to the screw rear end 22, it is convenient to connect to an external drive device, providing power to the screw 2 and ensuring the normal operation of the device.

[0038] The working principle and usage process of this utility model are as follows: After the utility model is installed, it is connected to an external power supply and an external drive device. When the temperature sensing element of the temperature sensing hole 7 detects that the set temperature has been reached, the plastic granules (or powder) enter the cavity of the barrel 1 from the feed port 5. When the screw 2 pushes the plastic raw material from the rear end 22 of the screw to the front end 21 of the screw for compression, some of the moisture and gas in the raw material become atomized and overflow from the gap in the exhaust steel 61 of the exhaust mechanism 6 set in front of the feed port 5 of the barrel 1. After being collected through the space of multiple exhaust support columns 62, it is discharged towards the exhaust port 63 on the barrel 1. At this time, the plastic granules or powder larger than the exhaust steel 61 move forward along the screw through the homogenization section of the rear end 22 of the screw and come to the middle of the barrel 1. When the front end 21 of the screw and the rear end 22 of the screw meet, the feeding groove of the front end 21 of the screw is higher than the feeding groove of the rear end 22 of the screw, so that the compressed moisture and air in the plastic raw material are mixed with the plastic. The fluid separation process involves particle changes. Most of the moisture and gas atomizes and overflows through the gap in the exhaust steel 61 in the middle of the barrel 1. After being collected through the space of multiple exhaust support columns 62, it is discharged towards the exhaust port 63 in the middle section of the barrel 1. The fluid plastic raw material, carrying the remaining gas and moisture, is quickly compressed and homogenized twice by the screw 2 and then arrives at the exhaust section of the exhaust mechanism at the front of the barrel 1. The remaining moisture and gas in the raw material become atomized during the continuous pressurization process and overflow from the gap in the exhaust steel 61 at the front of the barrel 1. After being collected through the space of multiple exhaust support columns 62, it is discharged towards the exhaust port 63 at the front of the barrel 1. To enhance functionality, during the injection process, when the plastic passes through the nozzle 2, the gas or moisture is forced to overflow through the gap in the exhaust steel 61 under high injection pressure and then discharged towards the exhaust port 63 at the nozzle 2 after being collected through the space of multiple exhaust support columns 62. This completes the entire process of plastic melting, dehumidification, and exhaust.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage venting plastic machine barrel, characterized in that: Includes a material cylinder (1), the inside of which is a cavity, and a screw (2) is provided in the cavity. A flange (3) is fitted on one end of the material cylinder (1), and a nozzle (4) is installed on the flange (3). The nozzle (4) and the inside of the material cylinder (1) are connected through the flange (3). Both the material cylinder (1) and the nozzle (4) are provided with an exhaust mechanism (6).

2. The multi-stage venting plastic machine barrel according to claim 1, characterized in that: The exhaust mechanism (6) is provided in four sets, one set is installed on the nozzle (4), and the other three sets are installed on the material cylinder (1) in sequence.

3. A multi-stage venting plastic machine barrel according to claim 2, characterized in that: The exhaust mechanism (6) includes an exhaust steel (61), which is disposed inside the material cylinder (1). An exhaust support column (62) is provided around the outer side wall of the exhaust steel (61), and an exhaust hole (63) is provided above the exhaust support column (62) of the material cylinder (1).

4. A multi-stage venting plastic machine barrel according to claim 1, characterized in that: The screw (2) includes a screw front end (21) and a screw rear end (22), which are integrally formed. The screw front end (21) is located on the side close to the nozzle (4).

5. A multi-stage venting plastic machine barrel according to claim 1, characterized in that: The material cylinder (1) is provided with a temperature sensing hole (7), and there are several temperature sensing holes (7). The number of temperature sensing holes (7) varies depending on the size of the material cylinder.

6. A multi-stage venting plastic machine barrel according to claim 5, characterized in that: The feed cylinder (1) is provided with a feed port (5), which is located at the tail end of the screw (22).

7. A multi-stage venting plastic machine barrel according to claim 4, characterized in that: The screw shank (23) is provided at the end of the screw rear end (22) that is away from the screw front end (21).

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