Vacuum devolatilization device of extruder

Abstract

The utility model relates to the technical field of plastic production and processing, in particular to a vacuum devolatilization device of an extruder, which comprises a connecting sleeve, a feeding pipe, a filtering tank, a communicating pipe, a vacuum pump and a discharging pipe which are sequentially communicated, and the connecting sleeve is used for being communicated with an exhaust port of the extruder; the vacuum devolatilization device further comprises a control module, temperature sensors and a plurality of heating devices are connected to the outer portion of the connecting sleeve and the outer portion of the feeding pipe, the feeding pipe is further communicated with a vacuum meter, and the temperature sensors, the vacuum meter and the heating devices are all in signal connection with the control module. The utility model aims to provide the vacuum devolatilization device of the extruder, which can effectively restrain gas from being cooled and condensed when the gas is connected with the sleeve and improve the processing quality of plastic.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic production and processing, in particular to a vacuum devolatilization device of an extruder. Background Art

[0002] An extruder is a machine that uses high pressure and high temperature to form powdered materials into the desired shape. Due to different raw materials, volatile small molecules will be produced during the extrusion process. Some high molecular polymer materials themselves also contain a certain amount of unpolymerized residual monomers. If these small molecules remain in the material, it will affect the performance and appearance of the product. Therefore, the material needs to be devolatilized to remove the volatile small molecules.

[0003] However, when the existing vacuum devolatilization device is working, part of the gas is condensed when it encounters the connecting sleeve, and part of the liquid formed on the top cover of the connecting sleeve will drip onto the plastic of the extruder barrel, causing plastic defects. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a vacuum devolatilization device for an extruder, which can effectively inhibit the condensation of gas due to cold when connecting the sleeve and improve the processing quality of plastics.

[0005] The utility model is realized through the following technical solutions:

[0006] A vacuum devolatilization device for an extruder comprises a connecting sleeve, a feed pipe, a filter tank, a connecting pipe, a vacuum pump and a discharge pipe which are connected in sequence, wherein the connecting sleeve is used to be connected to an exhaust port of the extruder; the vacuum devolatilization device also comprises a control module, the outsides of the connecting sleeve and the feed pipe are connected to a temperature sensor and a plurality of heating devices, the feed pipe is also connected to a vacuum gauge, and the temperature sensor, the vacuum gauge and the heating device are all connected to the control module signal.

[0007] Wherein, the heating device is detachably connected to the feeding pipe.

[0008] The filter tank comprises a tank body, a tank cover arranged at the opening of the tank body and a locking device for sealing the tank cover at the opening of the tank body. A filter element is arranged in the tank body, and the tank body is connected to the feed pipe and the connecting pipe respectively.

[0009] Wherein, the connecting sleeve, the middle position of the tank cover and the feeding pipe are all equipped with windows.

[0010] Wherein, a sealing member is also arranged at the opening of the tank body.

[0011] Wherein, the connecting pipe is also equipped with a discharge valve.

[0012] Beneficial effects of the utility model:

[0013] The utility model discloses a vacuum devolatilization device for an extruder, which is provided with a connecting sleeve, a feeding pipe, a filtering tank, a connecting pipe, a vacuum pump, a feeding pipe, a control module, a temperature sensor, a vacuum gauge and a plurality of heating devices. When in use, the connecting sleeve is installed above the exhaust port of the extruder, and is connected with the vacuum pump through the feeding pipe, the filtering tank and the connecting pipe in sequence; then, when the extruder works, the control module detects the temperature of the connecting sleeve and the feeding pipe according to the temperature sensor, and controls the heating device to heat after the temperature is lower than a certain temperature, so as to avoid condensation of gas at the connecting sleeve and the feeding pipe, effectively inhibit the condensation of gas at the connecting sleeve due to cold, and improve the processing quality of plastic. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the utility model. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 This is another structural schematic diagram of the utility model.

[0017] Reference numerals

[0018] Connecting sleeve--101, feeding pipe--102, filtering tank--103, connecting pipe--104, vacuum pump--105, discharging pipe--106, temperature sensor--107, heating device--108, vacuum gauge--109, tank body--110, tank cover--111, locking device--112, window--113, unloading valve--114. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] An extruder is a machine that uses high pressure and high temperature to form powdered materials into the desired shape. Due to different raw materials, volatile small molecules will be produced during the extrusion process. Some high molecular polymer materials themselves also contain a certain amount of unpolymerized residual monomers. If these small molecules remain in the material, it will affect the performance and appearance of the product. Therefore, the material needs to be devolatilized to remove the volatile small molecules.

[0023] However, when the existing vacuum devolatilization device is working, part of the gas is condensed when it encounters the connecting sleeve, and part of the liquid formed on the top cover of the connecting sleeve will drip onto the plastic of the extruder barrel, causing plastic defects.

[0024] In order to solve the above problems, this embodiment discloses a vacuum devolatilization device for an extruder, the structure of which is as follows: Figure 1 and Figure 2 As shown, the vacuum devolatilization device includes a connecting sleeve 101, a feed pipe 102, a filter tank 103, a connecting pipe 104, a vacuum pump 105 and a discharge pipe 106 which are connected in sequence, and the connecting sleeve 101 is used to be connected to the exhaust port of the extruder; the vacuum devolatilization device also includes a control module, and the outsides of the connecting sleeve 101 and the feed pipe 102 are connected to a temperature sensor 107 and a plurality of heating devices 108, and the feed pipe 102 is also connected to a vacuum gauge 109, and the temperature sensor 107, the vacuum gauge 109 and the heating device 108 are all connected to the control module signal.

[0025] Specifically, the vacuum devolatilization device of an extruder of the utility model is provided with a connecting sleeve 101, a feed pipe 102, a filter tank 103, a connecting pipe 104, a vacuum pump 105, a discharge pipe 106, a control module, a temperature sensor 107, a vacuum gauge 109 and a plurality of heating devices 108. When in use, the connecting sleeve 101 is installed above the exhaust port of the extruder, and is connected to the vacuum pump 105 through the feed pipe 102, the filter tank 103 and the connecting pipe 104 in sequence; then, when the extruder works, the control module detects the temperature of the connecting sleeve 101 and the feed pipe 102 according to the temperature sensor 107, and controls the heating device 108 to heat after the temperature is lower than a certain temperature, so as to avoid condensation of gas at the connecting sleeve 101 and the feed pipe 102, effectively inhibit the condensation of gas due to cold in the connecting sleeve, and improve the processing quality of plastic.

[0026] Furthermore, the heating device 108 is detachably connected to the feed pipe 102. In this embodiment, the heating device 108 preferably includes a heating coil and a heating plate, both of which are connected to the control module via a plug to achieve signal connection, and the plug can also be detachable from the wire for easy disassembly and assembly.

[0027] The filter tank 103 includes a tank body 110, a tank cover 111 disposed at the opening of the tank body 110, and a locking device 112 for sealing the tank cover 111 at the opening of the tank body 110. A filter element is disposed in the tank body 110, and the tank body 110 is respectively connected to the feed pipe 102 and the connecting pipe 104. In this embodiment, the locking device 112 is preferably a screw; preferably, a sealing member is also disposed at the opening of the tank body 110 to ensure the sealing effect between the tank cover 111 and the tank body 110.

[0028] The connecting sleeve 101, the middle part of the tank cover 111 and the feeding pipe 102 are all provided with windows 113, which are convenient for observing whether the exhaust port and the plug-in have accumulated materials and the movement of the materials.

[0029] The connecting pipe 104 is also provided with a discharge valve 114, which is convenient for controlling the on-off between the feed pipe 102 and the vacuum pump 105, and is convenient for maintenance and other operations.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A vacuum devolatilization device for an extruder, characterized in that: It includes a connecting sleeve, a feeding pipe, a filter tank, a connecting pipe, a vacuum pump and a discharging pipe which are connected in sequence, and the connecting sleeve is used to communicate with the exhaust port of the extruder; The vacuum devolatilization device also includes a control module. The connection sleeve and the outside of the feed pipe are connected to a temperature sensor and a plurality of heating devices. The feed pipe is also connected to a vacuum gauge. The temperature sensor, vacuum gauge and heating device are all connected to the control module signal.

2. A vacuum devolatilization device for an extruder according to claim 1, characterized in that: The heating device is detachably connected to the feeding pipe.

3. The vacuum devolatilization device of an extruder according to claim 1, characterized in that: The filter tank comprises a tank body, a tank cover arranged at the opening of the tank body and a locking device for sealing the tank cover at the opening of the tank body. A filter element is arranged in the tank body, and the tank body is respectively connected with a feed pipe and a connecting pipe.

4. A vacuum devolatilization device for an extruder according to claim 3, characterized in that: The connecting sleeve, the middle position of the tank cover and the feeding pipe are all equipped with viewing windows.

5. The vacuum devolatilization device of an extruder according to claim 3, characterized in that: A sealing member is also provided at the opening of the tank body.

6. The vacuum devolatilization device of an extruder according to claim 1, characterized in that: The connecting pipe is also provided with a material discharge valve.

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