Extrusion forming device for plastic production

Abstract

The utility model relates to the technical field of plastic production, and discloses an extrusion forming device for plastic production, which comprises a plastic extruder body, a preheating bin and an exhaust bin, the preheating bin and the exhaust bin are mounted at the extrusion end of the plastic extruder body, and an extrusion die is mounted at the tail end of the preheating bin; an exhaust motor is installed at the tail end of the plastic extruder body, a vibration ring is installed outside the preheating bin, and the preheating bin and the exhaust bin which are obliquely communicated through an exhaust pipe are arranged at the position, located on the front portion of an extrusion die, of the extrusion forming device for plastic production. The heating rod is used for discharging air for molten plastic in the preheating bin, and the spiral blade located in the exhaust pipe rotates to generate certain pressure on the preheating bin, so that the fullness degree of the molten plastic located at the front end of the extrusion die can be improved; and gas in the molten plastic enters the exhaust bin through the exhaust pipe and a channel of the spiral blade.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic production, in particular to an extrusion molding device for plastic production. Background Art

[0002] An extruder is a mechanical device used for plastic processing. It extrude heated plastic granules or powder into continuous profiles or pipes of specific shapes through an extruder head.

[0003] The working process of the extruder usually includes several steps of feeding, heating, extrusion, cooling and cutting. The extruder is widely used in making various plastic products, such as pipes, plates, profiles, films, ropes, etc. It has a simple working principle, high production efficiency, and can achieve large-scale continuous production, so it plays an important role in the plastic processing industry.

[0004] At present, plastic extrusion molding machines often produce some waste when they start running. This is because the extruder needs a certain amount of time to reach a stable working state when it starts, so the products produced at the beginning may contain air or be not full enough. This part of the waste usually needs to be discarded, causing waste. Utility Model Content

[0005] The utility model aims to provide an extrusion molding device for plastic production, aiming to solve the problem of waste caused by waste generated when the existing plastic extrusion molding machine starts to run.

[0006] The utility model is realized in this way: an extrusion molding device for plastic production comprises a plastic extruder body and a preheating bin and an exhaust bin installed at the extrusion end of the plastic extruder body, wherein an extrusion die is installed at the end of the preheating bin;

[0007] An exhaust motor is installed at the end of the plastic extruder body, and a vibration ring is installed outside the preheating bin. The vibration ring is driven by the exhaust motor. An exhaust pipe is connected between the preheating bin and the exhaust bin. A heating plate is wrapped around the outside of the bottom of the preheating bin, and an air valve is installed on the top of the exhaust bin.

[0008] Preferably, the surface of the preheating chamber and the inner wall of the vibration ring are evenly distributed with mutually meshing setback blocks;

[0009] The material of the setback block is hard silicone, and the exhaust motor is connected to the vibration ring through a belt.

[0010] Preferably, the exhaust pipe is arranged to be inclined upward along the direction of the extrusion die, and the inclination angle ranges from 5° to 45°.

[0011] Preferably, a screw is provided inside the plastic extruder body, the end of the screw passes through and extends into the interior of the preheating chamber, and the end of the screw is placed below the exhaust pipe passing through the preheating chamber.

[0012] Preferably, the output shaft of the exhaust motor is also connected to a driving rod extending into the exhaust chamber, the internal bearing of the exhaust pipe is connected to a pressure rod, and the ends of the driving rod and the pressure rod are both sleeved with mutually meshing helical gears;

[0013] The pressure rod is provided with a spiral blade on its exterior, and the exterior of the spiral blade contacts the inner wall of the exhaust pipe.

[0014] Preferably, a baffle plate is provided inside one end of the exhaust pipe close to the preheating chamber, and exhaust holes are evenly distributed on the surface of the baffle plate.

[0015] The utility model discloses an extrusion molding device for plastic production, which has the following beneficial effects:

[0016] 1. In the extrusion molding device of plastic production, a preheating chamber and an exhaust chamber connected obliquely by an exhaust pipe are arranged at the front of the extrusion die. A vibration ring is arranged to drive the preheating chamber to generate high-frequency vibration, and a heating rod is used to exhaust air for the molten plastic in the preheating chamber. The spiral blade in the exhaust pipe is rotated to generate a certain pressure on the preheating chamber, which can not only improve the fullness of the molten plastic at the front end of the extrusion die, but also make the gas in the molten plastic enter the exhaust chamber through the exhaust pipe and the channel of the spiral blade;

[0017] 2. The exhaust pipe is arranged upwardly along the direction of the extrusion die, and the inclination angle ranges from 5° to 45°. Within this inclination angle range, the gas in the molten plastic is more likely to enter the exhaust bin, while the molten plastic is not easily squeezed into the exhaust bin under the gas pressure;

[0018] 3. A baffle plate is arranged inside one end of the exhaust pipe close to the preheating chamber, and exhaust holes are evenly distributed on the surface of the baffle plate to reduce the molten plastic in the preheating chamber from entering the exhaust pipe. The exhaust holes cooperate with the spiral blades to generate a certain pressure inside the exhaust pipe to prevent the molten plastic from passing through the exhaust holes. However, the gas in the preheating chamber can enter the exhaust pipe through the exhaust holes and enter the exhaust chamber through the channels between the spiral blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of an extrusion molding device for plastic production provided by an embodiment of the utility model;

[0020] Figure 2 This is an extrusion molding device for plastic production provided by the embodiment of the utility model Figure 1Schematic diagram of the AA section structure along the arrow direction;

[0021] Figure 3 This is an extrusion molding device for plastic production provided by the embodiment of the utility model Figure 1 Schematic diagram of the local enlarged structure at point B in the middle.

[0022] Marking Description:

[0023] 1. Plastic extruder body; 2. Preheating chamber; 3. Exhaust chamber; 4. Vibration ring;

[0024] 11. Screw; 21. Heating plate; 22. Extrusion die;

[0025] 31. Exhaust pipe; 311. Pressure rod; 312. Spiral blade; 32. Air valve; 33. Baffle;

[0026] 41. Exhaust motor; 411. Driving rod. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0028] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present utility model. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0030] In this embodiment:

[0031] Reference Figure 1-3 As shown, a preferred embodiment of the utility model is provided.

[0032] The extrusion molding device for plastic production of this embodiment includes a plastic extruder body 1 and a preheating bin 2 and an exhaust bin 3 installed at the extrusion end of the plastic extruder body 1. The end of the preheating bin 2 is installed with an extrusion die 22. Plastic particles are fed into the preheating bin 2 through the plastic extruder body 1. The exhaust bin 3 is used to exhaust the air of the material in the preheating bin 2 and make the material full to achieve a stable working state.

[0033] An exhaust motor 41 is installed at the end of the plastic extruder body 1, and a vibration ring 4 is installed on the outside of the preheating bin 2. The vibration ring 4 is driven by the exhaust motor 41. An exhaust pipe 31 is also connected between the preheating bin 2 and the exhaust bin 3. The bottom outer side of the preheating bin 2 is also wrapped with a heating plate 21. An air valve 32 is also installed on the top of the exhaust bin 3. When the gas in the exhaust bin 3 accumulates to a certain pressure, it will be discharged through the air valve 32.

[0034] In order to enable the material in the preheating bin 2 to generate high-frequency vibration, the surface of the preheating bin 2 and the inner wall of the vibration ring 4 are evenly distributed with mutually meshing blocks, the material of the blocks is hard silicone, and the exhaust motor 41 is connected to the vibration ring 4 through a belt. When the exhaust motor 41 drives the vibration ring 4 to rotate rapidly, the blocks between the preheating bin 2 and the vibration ring 4 will quickly rub, and the high-frequency friction process can drive the preheating bin 2 to vibrate, thereby separating the gas in the molten plastic, and the high-temperature gas will rise and enter the exhaust bin 3 through the exhaust pipe 31;

[0035] Furthermore, the exhaust pipe 31 is arranged to be inclined upward along the direction of the extrusion die 22, and the inclination angle ranges from 5° to 45°. Within this inclination angle range, the gas in the molten plastic is more likely to enter the exhaust bin 3, while the molten plastic is not easily squeezed into the exhaust bin 3 under the gas pressure;

[0036] It is worth noting that the output shaft of the exhaust motor 41 is also connected to a driving rod 411 extending to the inside of the exhaust bin 3, the internal bearing of the exhaust pipe 31 is connected to a pressure rod 311, the ends of the driving rod 411 and the pressure rod 311 are both sleeved with mutually meshing helical gears, the outside of the pressure rod 311 is provided with a spiral blade 312, the outside of the spiral blade 312 is in contact with the inner wall of the exhaust pipe 31, the exhaust motor 41 drives the pressure rod 311 to rotate through the driving rod 411, and the molten plastic is continuously pushed toward the direction of the preheating bin 2 through the spiral blade 312, which can not only improve the fullness of the molten plastic at the front end of the extrusion die 22, but also allow the gas in the molten plastic to enter the exhaust bin 3 through the exhaust pipe 31 and the channel of the spiral blade 312.

[0037] Among them, a baffle plate 33 is arranged inside one end of the exhaust pipe 31 close to the preheating bin 2, and exhaust holes are evenly distributed on the surface of the baffle plate 33 to reduce the situation where the molten plastic in the preheating bin 2 enters the exhaust pipe 31, and the exhaust holes cooperate with the spiral blades 312 to generate a certain pressure inside to prevent the molten plastic from passing through the exhaust holes, but can ensure that the gas in the preheating bin 2 enters the exhaust pipe 31 through the exhaust holes, and enters the exhaust bin 3 through the channels between the spiral blades 312.

[0038] In the extrusion molding device for plastic production, a preheating chamber 2 and an exhaust chamber 3 which are obliquely connected by an exhaust pipe 31 are arranged in front of the extrusion mold 22. While the preheating chamber 2 is driven to generate high-frequency vibration by the vibration ring 4, the heating rod 21 is used to exhaust air for the molten plastic in the preheating chamber 2, and the spiral blade 312 located in the exhaust pipe 31 is rotated to generate a certain pressure on the preheating chamber 2, which can not only improve the fullness of the molten plastic at the front end of the extrusion mold 22, but also allow the gas in the molten plastic to enter the exhaust chamber 3 through the spiral channel formed by the spiral blade 312 in the exhaust pipe 31.

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

Claims

1. An extrusion molding device for plastic production, characterized in that: It comprises a plastic extruder body, and a preheating chamber and an exhaust chamber installed at the extrusion end of the plastic extruder body, wherein an extrusion die is installed at the end of the preheating chamber; An exhaust motor is installed at the end of the plastic extruder body, and a vibration ring is installed outside the preheating bin. The vibration ring is driven by the exhaust motor. An exhaust pipe is connected between the preheating bin and the exhaust bin. A heating plate is wrapped around the outside of the bottom of the preheating bin, and an air valve is installed on the top of the exhaust bin.

2. An extrusion molding device for plastic production as claimed in claim 1, characterized in that: The surface of the preheating chamber and the inner wall of the vibration ring are evenly distributed with mutually meshing setback blocks; The material of the setback block is hard silicone, and the exhaust motor is connected to the vibration ring through a belt.

3. An extrusion molding device for plastic production as claimed in claim 1, characterized in that: The exhaust pipe is arranged to be inclined upward along the direction of the extrusion die, and the inclination angle ranges from 5° to 45°.

4. An extrusion molding device for plastic production as claimed in claim 1, characterized in that: A screw is arranged inside the plastic extruder body, the end of the screw passes through and extends into the preheating chamber, and the end of the screw is placed below the exhaust pipe passing through the preheating chamber.

5. An extrusion molding device for plastic production as claimed in claim 1, characterized in that: The output shaft of the exhaust motor is also connected to a driving rod extending into the interior of the exhaust chamber, the internal bearing of the exhaust pipe is connected to a pressure rod, and the ends of the driving rod and the pressure rod are both sleeved with mutually meshing helical gears; The pressure rod is provided with a spiral blade on its exterior, and the exterior of the spiral blade contacts the inner wall of the exhaust pipe.

6. An extrusion molding device for plastic production as claimed in claim 1, characterized in that: A baffle plate is arranged inside one end of the exhaust pipe close to the preheating chamber, and exhaust holes are evenly distributed on the surface of the baffle plate.

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