Vacuum degassing equipment for producing and processing plastic products

Abstract

The utility model relates to the technical field of vacuum degassing, and discloses vacuum degassing equipment for producing and processing plastic products, which comprises a degassing tank and support legs, the support legs are uniformly supported on an outer ring below the degassing tank, a gas pipe communicated with the inside of the degassing tank is connected above the degassing tank, an electric push rod is mounted in the middle of the upper part of the degassing tank, and the electric push rod is connected with the degassing tank. The extending end of the electric push rod penetrates into the degassing tank, a lower plate is fixed to the tail end of the bottom of the electric push rod, and a vibration cylinder is arranged in the degassing tank below the electric push rod. According to the technical scheme, the vibration cylinder with a large area is arranged at the bottom of the electric push rod in a lifting mode and can be driven to vibrate to extrude molten plastic, a large contact area is obtained to transmit the vibration effect, and the vibration degassing effect is improved by being matched with the downward pressing acting force; and the vibration cylinder and the electric push rod are combined and connected through the rubber pad, the fixing frame and the lower plate, rigid direct contact does not exist, and it is avoided that more vibration is transmitted to the electric push rod, and the service life is shortened.

Description

Technical Field

[0001] This utility model relates to the field of vacuum degassing technology, specifically a vacuum degassing device for the production and processing of plastic products. Background Technology

[0002] During plastic processing, especially after melting, gases are easily generated and bubbles are formed. The purpose of vacuum degassing in plastic product manufacturing is mainly to remove gases from the material, including moisture, air, and other volatile substances. If these gases are not removed in time, they may cause defects such as bubbles and shrinkage cavities during processing, affecting the quality and performance of plastic products. Vacuum degassing can improve the strength and appearance quality of plastic products, and also help extend their service life. Molten plastic liquid takes a long time to expel the gases it carries in such a vacuum environment, and the gas expulsion effect is poor.

[0003] The utility model patent with publication number CN222039537U discloses a vacuum degassing device for the production and processing of plastic products. The protrusions on the top of the arc-shaped rod cause the rollers on both sides of the support plate to vibrate as they pass through the protrusions during the slow contraction and extension of the electric telescopic rod. This vibration is transmitted through the support plate to the degassing tank, which shakes out the gas in the molten plastic liquid inside the degassing tank, thereby accelerating the degassing speed and improving the degassing effect of the plastic liquid.

[0004] However, the support plate transmits vibration to the degassing tank, which then transmits the vibration to the molten plastic. This weakens the vibration effect on the molten plastic, resulting in poor degassing performance. Furthermore, the vibration of the degassing tank itself reduces its lifespan. Therefore, we propose a vacuum degassing device for the production and processing of plastic products. Utility Model Content

[0005] The purpose of this utility model is to provide a vacuum degassing device for the production and processing of plastic products. By setting a vibrating cylinder with a large area that can be raised and lowered at the bottom of the electric push rod, it can be driven to vibrate and squeeze the molten plastic, and obtain a large contact area to transmit the oscillation effect. Combined with the downward pressure, it helps to improve the oscillation degassing effect. Moreover, the vibrating cylinder and the electric push rod are connected by a rubber pad, a fixed frame, and a lower plate, so there is no rigid direct contact. This avoids excessive vibration being transmitted to the electric push rod and reducing its service life, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A vacuum degassing device for the production and processing of plastic products, comprising a degassing tank and support legs. The support legs are evenly supported on the outer ring below the degassing tank. An air pipe communicating with the interior of the degassing tank is connected to the top of the degassing tank. An electric push rod is installed at the middle position above the degassing tank, with the extended end of the electric push rod penetrating into the degassing tank. A lower plate is fixed to the bottom end of the electric push rod. A vibrating cylinder is installed inside the degassing tank below the electric push rod. A fixing frame is welded and fixed at the middle position of the surface of the vibrating cylinder. The lower plate is placed in the fixing frame, and the electric push rod passes through the rod opening above the fixing frame into the fixing frame. A rubber pad is placed between the lower plate and the inner wall of the fixing frame. Two vibration motors are installed on the inner surface of the vibrating cylinder.

[0007] By adopting the above technical solution, after the molten plastic is put into the degassing tank, the vibrating cylinder is lowered to press down on the molten plastic and vibrate at the same time. The molten plastic is subjected to compression, and there is a large contact area between it and the vibrating cylinder, which has a good transmission of oscillation effect, which is conducive to better oscillation degassing in a vacuum environment.

[0008] Optionally, an electric heating plate is embedded in the inner wall of the degassing tank, and the electric heating plate is located in the lower inner wall of the degassing tank.

[0009] By adopting the above technical solution, the electric heating plate works to heat and maintain the temperature of the molten plastic during vacuum degassing.

[0010] Optionally, a feed pipe is laterally connected to the upper side of the degassing tank, and a valve is installed on the feed pipe.

[0011] By adopting the above technical solution, molten plastic is added into the degassing tank through the feed pipe.

[0012] Optionally, a discharge pipe is vertically connected to the bottom center of the degassing tank, and a valve is installed on the discharge pipe.

[0013] By adopting the above technical solution, the degassed molten plastic is discharged from the discharge pipe to the subsequent production equipment.

[0014] Optionally, when the vibrating cylinder is lowered to its lowest height, its upper height is greater than the height of the feed pipe.

[0015] By adopting the above technical solution, it is ensured that when molten plastic enters from the feed pipe, it does not overflow to the top of the vibrating cylinder and cause contamination.

[0016] Optionally, at least two tracheas are provided, and the tracheas have the same diameter.

[0017] By adopting the above technical solution, at least one air pipe is connected to the vacuum pump unit, and a pressure gauge is also required for connection and installation.

[0018] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0019] 1. The technical solution of this application sets up a vibrating cylinder with a large area that can be raised and lowered at the bottom of the electric push rod. It can be driven to vibrate and squeeze the molten plastic, and obtain a large contact area to transmit the oscillation effect. Combined with the downward pressure, it helps to improve the oscillation degassing effect. Furthermore, the vibrating cylinder and the electric push rod are connected by a rubber pad, a fixed frame, and a lower plate, so there is no rigid direct contact, which avoids more vibration being transmitted to the electric push rod and reducing its service life.

[0020] 2. The technical solution of this application uses an electric heating plate embedded in the inner wall of the degassing tank to heat the molten plastic during the vacuum and vibration degassing process, thereby achieving the purpose of heat preservation. Attached Figure Description

[0021] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of the vacuum degassing equipment for plastic product manufacturing and processing according to this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the vacuum degassing equipment used in the production and processing of plastic products according to this utility model;

[0024] Figure 3 This is a schematic diagram of the connection structure between the lower plate and the fixed frame of the vacuum degassing equipment used in the production and processing of plastic products according to this utility model.

[0025] In the diagram: 1. Degassing tank; 11. Heating plate; 12. Air pipe; 13. Feed pipe; 14. Discharge pipe; 15. Valve; 16. Support leg; 2. Electric actuator; 21. Lower plate; 3. Vibrating cylinder; 31. Vibrating motor; 32. Fixing frame; 321. Rod opening; 33. Rubber pad. Detailed Implementation

[0026] Please see Figure 1-3This utility model provides a technical solution: a vacuum degassing device for the production and processing of plastic products, including a degassing tank 1 and support legs 16. The support legs 16 are evenly supported on the outer ring below the degassing tank 1. The support legs 16 are of the same height and stably support the degassing tank 1. An air pipe 12 communicating with the inside of the degassing tank 1 is connected to the top of the degassing tank 1, and at least two air pipes 12 are provided. The air pipes 12 have the same diameter. When in use, one air pipe 12 is used to connect to a positive air pump group to evacuate air from the inside of the degassing tank 1, and the other can be equipped with a pressure gauge to detect the internal pressure of the degassing tank 1. Other air pipes 12 can be connected to install more detection devices. Unused air pipes 12 need to be sealed.

[0027] An electric push rod 2 is installed at the top center of the degassing tank 1. The protruding end of the electric push rod 2 extends into the lower part of the degassing tank 1, and a lower plate 21 is fixed to the bottom end of the electric push rod 2. A vibrating cylinder 3 is installed inside the degassing tank 1 below the electric push rod 2. A fixing frame 32 is welded and fixed to the middle of the surface of the vibrating cylinder 3. The lower plate 21 is placed in the fixing frame 32, and the electric push rod 2 passes through the rod opening 321 above the fixing frame 32 into the fixing frame 32. A rubber pad 33 is placed between the lower plate 21 and the inner wall of the fixing frame 32. Two vibration motors 31 are installed on the inner surface of the vibrating cylinder 3. When in use, molten plastic is added to the lower part of the degassing tank 1. The electric push rod 2 is controlled to drive the vibrating cylinder 3 to descend and apply pressure to the molten plastic. At the same time, the vibration motors 31 are started to drive the vibrating cylinder 3 to vibrate. When pressed down, the vibrating cylinder 3 has a large contact area with the molten plastic, which better transmits the vibration. Under the action of downward pressure and vibration, it is easier to remove bubbles under vacuum and vibration.

[0028] An electric heating plate 11 is also embedded in the inner wall of the degassing tank 1. The electric heating plate 11 is located in the lower inner wall of the degassing tank 1. During the process of removing air bubbles, the electric heating plate 11 is activated, which can heat and keep the molten plastic warm. It also provides a heat insulation protection cover for the vibration motor 31, improving its high temperature resistance.

[0029] A feed pipe 13 is horizontally connected to the upper side of the degassing tank 1. A valve 15 is installed on the feed pipe 13. The feed pipe 13 is connected to the molten plastic supply pipe. When the valve 15 is opened, molten plastic is injected into the degassing tank 1. When the vibrating cylinder 3 is lowered to its lowest height, its height above the feed pipe 13 is greater than the height of the feed pipe 13, so as to prevent the molten plastic from entering the vibrating cylinder 3 and causing contamination.

[0030] A discharge pipe 14 is vertically connected to the bottom center of the degassing tank 1. A valve 15 is installed on the discharge pipe 14. The discharge pipe 14 is connected to the subsequent production equipment. After vacuum degassing with vibration, the valve 15 on the discharge pipe 14 is opened to discharge the molten plastic into the subsequent production equipment.

[0031] In use, the feed pipe 13 is connected to the molten plastic supply pipe, while the discharge pipe 14 is connected to subsequent production equipment, such as injection molding machines and extruders. The two air pipes 12 at the top are connected to the vacuum pump group and the pressure gauge, respectively. After the electric push rod 2 drives the vibrating cylinder 3 to rise to a certain height, the valve 15 on the feed pipe 13 is opened to inject molten plastic into the degassing tank 1. Then, the valve 15 on the feed pipe 13 is closed, and the electric heating plate 11 remains running to heat and keep the molten plastic warm. Then, the electric push rod 2 is controlled to drive the vibrating cylinder 3 to lower to a certain height. The vibrating motor 31 is working and makes the vibrating cylinder 3 rotate. When the vibrating cylinder 3 lowers to a certain height, it has a squeezing effect on the molten plastic and transmits the oscillation effect to the molten plastic, which helps to better remove air bubbles and be drawn away by the positive air pump group. Finally, the solenoid valve on the discharge pipe 14 is opened to allow the molten plastic after removing air bubbles to be discharged from the discharge pipe 14 to the outside. After the molten plastic is discharged, the valve 15 on the discharge pipe 14 is closed again, and the next set of molten plastic degassing work can be carried out.

Claims

1. A vacuum degassing device for the production and processing of plastic products, comprising a degassing tank (1) and support legs (16), the support legs (16) being evenly supported on the outer ring below the degassing tank (1), and an air pipe (12) communicating with the interior of the degassing tank (1) being connected to the top of the degassing tank (1), characterized in that: An electric push rod (2) is installed at the upper middle position of the degassing tank (1). The protruding end of the electric push rod (2) penetrates into the degassing tank (1), and a lower plate (21) is fixed at the bottom end of the electric push rod (2). A vibrating cylinder (3) is installed inside the degassing tank (1) below the electric push rod (2). A fixed frame (32) is welded and fixed in the middle of the surface of the vibrating cylinder (3). The lower plate (21) is placed in the fixed frame (32), and the electric push rod (2) passes through the rod opening (321) above the fixed frame (32) and enters the fixed frame (32). A rubber pad (33) is placed between the lower plate (21) and the inner wall of the fixed frame (32). Two vibrating motors (31) are installed on the inner surface of the vibrating cylinder (3).

2. The vacuum degassing equipment for plastic product manufacturing and processing according to claim 1, characterized in that: An electric heating plate (11) is embedded in the inner wall of the degassing tank (1), and the electric heating plate (11) is located in the lower inner wall of the degassing tank (1).

3. The vacuum degassing equipment for plastic product manufacturing and processing according to claim 1, characterized in that: The degassing tank (1) is horizontally connected to the upper side of the feed pipe (13), and a valve (15) is installed on the feed pipe (13).

4. The vacuum degassing equipment for plastic product manufacturing and processing according to claim 1, characterized in that: The bottom center of the degassing tank (1) is vertically connected to a discharge pipe (14), and a valve (15) is installed on the discharge pipe (14).

5. The vacuum degassing equipment for plastic product manufacturing and processing according to claim 3, characterized in that: When the vibrating cylinder (3) is lowered to its lowest height, its height above is greater than the height of the feed pipe (13).

6. The vacuum degassing equipment for plastic product manufacturing and processing according to claim 1, characterized in that: At least two tracheas (12) are provided, and the tracheas (12) have the same diameter.

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