A plastic film screw extrusion device

Abstract

The utility model discloses a kind of plastic film screw extrusion devices, including screw barrel, driving mechanism, screw shaft, extrusion die head, air blower, injection pipe, air supply pipe and heater, the screw shaft is rotatably arranged in screw barrel, driving mechanism is used to drive screw shaft rotation, screw barrel end portion is communicated with extrusion die head by conveying pipeline, extrusion die head bottom is equipped with the extrusion cavity for the forming plastic film, air blower is connected with injection pipe by the air supply pipe, heater is located on air supply pipe, injection pipe is used to inject high-pressure hot air flow to extrusion die head interior.The utility model passes through feed hopper and sends plastic raw material into screw barrel, heating ring can heat plastic raw material to molten state, screw shaft can push and compress plastic raw material, make it fully melt, extrusion die head can receive molten plastic and make it into film shape, air blower is sent into extrusion die head by air supply pipe with high-pressure airflow, to accelerate the film forming process, effectively improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of screw extrusion devices, and more particularly to a screw extrusion device for plastic film. Background Technology

[0002] A plastic film screw extruder is a device that uses a rotating screw shaft to propel plastic raw materials through a screw barrel. After being heated and melted, the raw materials are formed into films through an extrusion die. Plastic film screw extruders are widely used in industries such as packaging, electronics, and pharmaceuticals, and are the core equipment for manufacturing various film materials.

[0003] In the existing technology, commercially available film screw extruders have the problem of slow extrusion speed during the film forming process, which results in a long transition time for the plastic film from the molten state to the solidified state, thus affecting the forming efficiency of the plastic film and extending the product production cycle.

[0004] Therefore, existing technologies have shortcomings and need to be improved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a plastic film screw extrusion device that improves production efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution: a plastic film screw extrusion device, comprising a screw barrel, a drive mechanism, a screw shaft, an extrusion die, a blower, a spray pipe, an air supply pipe, and a heater;

[0007] The top of the screw barrel is provided with a feed hopper, which is used to feed plastic raw materials into the screw barrel. The screw barrel is provided with a plurality of heating coils along its extension direction, which are used to heat the molten plastic raw materials.

[0008] The screw shaft is rotatably disposed inside the screw barrel, and the drive mechanism is connected to the screw shaft to drive the screw shaft to rotate. The screw shaft is used to push the molten plastic raw material to flow along the extension direction of the screw barrel when rotating.

[0009] The end of the screw barrel is connected to the extrusion die through a conveying pipe. The extrusion die is hollow inside and has an extrusion cavity at its bottom for forming a plastic film.

[0010] The blowpipes are located on both sides of the extrusion die, and the blower is connected to the blowpipes through the air supply pipe. The blowpipes are used to spray high-pressure airflow into the interior of the extrusion die, and the heater is located on the air supply pipe to heat the high-pressure airflow.

[0011] The plastic film screw extrusion device described above also includes an insulation sleeve, a cooling fan, and cooling pipes.

[0012] The insulation sleeve wraps around the heating coil, the air outlet of the cooling fan is connected to one end of the cooling pipe, and the other end of the cooling pipe passes through the insulation sleeve and is located outside the heating coil.

[0013] In the above technical solution, the heat insulation sleeve of the plastic film screw extrusion device is provided with perforated holes for air circulation.

[0014] In the above technical solution, each heating coil in the plastic film screw extrusion device is provided with a temperature probe at its side end. The temperature probe extends into the screw barrel to collect the temperature of the screw barrel.

[0015] The plastic film screw extrusion device described above also includes a protective cover, which is located outside the screw barrel.

[0016] The plastic film screw extrusion device described above also includes a support frame, and the screw barrel is mounted on the support frame.

[0017] In the above technical solution, the screw extrusion device for plastic film has a filter screen at the end of the screw barrel near the extrusion die, and the filter screen is used to filter impurities in the screw barrel.

[0018] The plastic film screw extrusion device described above also includes a pressure gauge, which is mounted on the screw barrel to detect the pressure inside the screw barrel.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The feed hopper of this invention can feed plastic raw materials into the screw barrel. The heating coil can heat the plastic raw materials in the screw barrel to make them reach a molten state. The screw shaft can push the molten plastic raw materials forward and fully melt the plastic through compression. The extrusion die can receive the molten plastic raw materials and shape them into a film. The blower can send high-pressure airflow into both sides of the extrusion die through the air supply pipe, thereby accelerating the transformation of the film from a molten state to a solidified state. In addition, the jetting effect of the high-pressure airflow can also promote the rapid forming of the film, thereby improving the production efficiency of plastic film. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the screw barrel mounting structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the jet pipe installation structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the cooling fan installation structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the heating coil installation structure of this utility model. Detailed Implementation

[0028] To make the utility model's objectives, features, and advantages more apparent and understandable, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0030] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] like Figures 1 to 5 As shown, this utility model embodiment provides a plastic film screw extrusion device, including a screw barrel 1, a drive mechanism 2, a screw shaft 3, an extrusion die 4, a blower 5, a blowpipe 6, an air supply pipe 7, and a heater 8. The top of the screw barrel 1 is provided with a feed hopper 11, which is used to feed plastic raw materials into the screw barrel 1. The screw barrel 1 is provided with multiple heating coils 12 along its extending direction, which are used to heat the molten plastic raw materials. The screw shaft 3 is rotatably disposed inside the screw barrel 1. The drive mechanism 2 is connected to the screw shaft 3 to drive the screw shaft 3 to rotate. The screw shaft 3 is used to push the molten plastic raw materials to flow along the extending direction of the screw barrel 1 during rotation. The end of the screw barrel 1 is connected to a feed pipe... The feeding pipe is connected to the extrusion die 4, which is hollow inside and has an extrusion cavity 40 at its bottom for forming a plastic film. The feed hopper 11 is located at the top of the screw barrel 1, so as to stably feed the plastic raw material into the screw barrel 1. Inside the screw barrel 1, multiple heating coils 12 are distributed along their extension direction to heat the plastic raw material inside the screw barrel 1 so that the plastic raw material is molten. The drive mechanism 2 can drive the screw shaft 3 to rotate, causing the molten plastic raw material to flow forward along the screw barrel 1. In addition, the screw shaft 3 also compresses the molten raw material to achieve full mixing and heating of the molten raw material. The end of the screw barrel 1 is connected to the extrusion die 4 through the conveying pipe, so that the molten plastic flows into the extrusion die 4, thereby forming a film of the required thickness and width.

[0032] The blower pipe 6 is located on both sides of the extrusion die 4. The blower 5 is connected to the blower pipe 6 through the air supply pipe 7. The blower pipe 6 is used to spray high-pressure airflow into the interior of the extrusion die 4. The heater 8 is located on the air supply pipe 7 to heat the high-pressure airflow. The blower 5 can send the high-pressure airflow into both sides of the extrusion die 4 through the air supply pipe 7. This airflow can quickly remove the heat from the film surface, thereby accelerating the film's transition from a molten state to a solidified state. In addition, the injection of high-pressure airflow not only helps the film cool rapidly, but also accelerates the film forming process through the propulsion of the airflow, thereby improving the production efficiency of plastic film. At the same time, the airflow can also keep the film with uniform thickness and shape, avoiding defects or deformation on the film surface. The heater 8 is located on the air supply pipe 7 to heat the airflow, so that the airflow temperature reaches a suitable cooling condition.

[0033] like Figure 4 and Figure 5 As shown, the system further includes an insulation sleeve 13, a cooling fan 14, and a cooling pipe 15. The insulation sleeve 13 wraps around the heating coil 12. The air outlet of the cooling fan 14 is connected to one end of the cooling pipe 15, and the other end of the cooling pipe 15 passes through the insulation sleeve and is located outside the heating coil 12. The insulation sleeve 13, covering the heating coil 12, reduces heat loss and improves heating efficiency, allowing the plastic material in the barrel to reach a molten state in a shorter time. The cooling fan 14 and the cooling pipe 15 together constitute an auxiliary cooling system. When the barrel temperature exceeds a set value, the cooling fan 14 starts, guiding cold air to the outside of the heating coil 12 through the cooling pipe 15, thereby reducing the temperature.

[0034] like Figure 4 As shown, the insulation sleeve 13 is further provided with perforated holes 130 for air circulation. By providing perforated holes 130 on the insulation sleeve 13, a channel can be provided for the rapid dissipation of excess heat, thereby improving the cooling effect.

[0035] like Figure 5 As shown, each of the heating coils 12 is further provided with a temperature probe 16 on its side. The temperature probe 16 extends into the screw barrel 1 to collect the temperature of the screw barrel 1, so that the heating coil 12 can adjust the heating power according to the feedback information to avoid the plastic from overheating and degrading due to excessive temperature.

[0036] like Figure 1 As shown, it further includes a protective cover 17, which is located outside the screw barrel 1. The protective cover 17 can prevent operators from accidentally coming into contact with the high temperature screw barrel 1 during operation and maintenance, thereby reducing the occurrence of safety accidents such as burns.

[0037] like Figure 2 As shown, the system further includes a support frame 18 on which the screw barrel 1 is mounted. The support frame 18 can withstand the weight and vibration generated by the screw barrel 1 and its internal components during operation, thereby preventing the equipment from shifting or deforming due to vibration.

[0038] like Figure 4 As shown, further, a filter screen 10 is provided at the end of the screw barrel 1 near the extrusion die 4. The filter screen 10 is used to filter impurities in the screw barrel 1. The filter screen 10 can intercept and remove these impurities in time when the plastic raw material flows through the screw barrel 1, preventing them from entering the extrusion die 4, thereby avoiding impurities from interfering with film forming.

[0039] like Figure 1 As shown, it further includes a pressure gauge 19, which is installed on the screw barrel 1 to detect the pressure inside the screw barrel 1, so that the operator can obtain the pressure data inside the screw barrel 1 in real time and judge in time whether there is a blockage, abnormal pressure increase or low pressure.

[0040] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A plastic film screw extrusion device, characterized in that, It includes a screw barrel, drive mechanism, screw shaft, extrusion die, blower, jet pipe, air supply pipe, and heater; The top of the screw barrel is provided with a feed hopper, which is used to feed plastic raw materials into the screw barrel. The screw barrel is provided with a plurality of heating coils along its extension direction, which are used to heat the molten plastic raw materials. The screw shaft is rotatably disposed inside the screw barrel, and the drive mechanism is connected to the screw shaft to drive the screw shaft to rotate. The screw shaft is used to push the molten plastic raw material to flow along the extension direction of the screw barrel when rotating. The end of the screw barrel is connected to the extrusion die through a conveying pipe. The extrusion die is hollow inside and has an extrusion cavity at its bottom for forming a plastic film. The blowpipes are located on both sides of the extrusion die, and the blower is connected to the blowpipes through the air supply pipe. The blowpipes are used to spray high-pressure airflow into the interior of the extrusion die, and the heater is located on the air supply pipe to heat the high-pressure airflow.

2. The plastic film screw extrusion device according to claim 1, characterized in that, It also includes an insulation jacket, a cooling fan, and cooling pipes; The insulation sleeve wraps around the heating coil, the air outlet of the cooling fan is connected to one end of the cooling pipe, and the other end of the cooling pipe passes through the insulation sleeve and is located outside the heating coil.

3. The plastic film screw extrusion device according to claim 2, characterized in that, The insulating sleeve has perforated holes for air circulation.

4. The plastic film screw extrusion device according to claim 1, characterized in that, Each of the heating coils is equipped with a temperature probe on its side, which extends into the screw barrel to collect the temperature of the screw barrel.

5. The plastic film screw extrusion device according to claim 1, characterized in that, It also includes a protective cover, which is located outside the screw barrel.

6. The plastic film screw extrusion apparatus according to claim 1, characterized in that, It also includes a support frame, on which the screw cylinder is mounted.

7. The plastic film screw extrusion apparatus according to claim 1, characterized in that, A filter screen is provided at the end of the screw barrel near the extrusion die, and the filter screen is used to filter impurities inside the screw barrel.

8. The plastic film screw extrusion apparatus according to claim 1, characterized in that, It also includes a pressure gauge, which is mounted on the screw barrel to detect the pressure inside the screw barrel.

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