A film recycling melting device

Abstract

The utility model discloses a kind of film recovery melting devices, including melting mechanism and extrusion mechanism, melting mechanism includes machine cylinder, screw rod and heating assembly, screw rod is rotatably arranged in machine cylinder, heating assembly is connected in the lateral wall of machine cylinder, the end of machine cylinder is equipped with discharge port;Extrusion mechanism includes die head and filter assembly, die head is connected with discharge port, the lateral wall of die head is provided with jack, filter assembly can be extended into the inside of die head by jack. The filter assembly of the utility model can be conveniently extracted to outside by jack, and it is convenient to clean or maintain filter assembly.

Description

Technical Field

[0001] This utility model relates to the field of plastic film recycling and production technology, and in particular to a film recycling melting device. Background Technology

[0002] In the process of producing plastic film using the casting method, to meet the specified size requirements of the plastic film, the plastic is generally trimmed during production to obtain a finished film of a specified width. After trimming, waste film is generated. This waste film can be recycled and remelted into granules to achieve waste reuse and reduce material waste. Plastic remelting and granulation is a key step in realizing the resource utilization of waste plastics. Its basic principle is to melt the plastic into a viscous fluid state in an extruder through heating and shearing, and then transform it into uniform strip-shaped recycled material through extrusion, cooling, and pelletizing processes, facilitating subsequent processing and molding. Due to the complex source of raw materials, they often contain inorganic impurities (such as sand, metal fragments) and incompletely melted foreign matter. If these impurities are not removed, they will directly lead to the deterioration of the quality of the strip-shaped recycled material. Therefore, filtration is required after the plastic is melted. Current technology generally uses filter screens for filtration. The filter screens are fixed to the extrusion discharge pipe by flange structures or bolts and nuts, which is inconvenient to replace, and prolonged neglect of filter screen replacement can easily cause clogging. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a thin film recycling and melting device, in which the filter assembly can be conveniently pulled out to the outside through the insertion hole, facilitating cleaning or maintenance of the filter assembly.

[0004] A thin film recycling and melting apparatus according to an embodiment of the present invention includes: The melting mechanism includes a barrel, a screw, and a heating assembly. The screw is rotatably disposed inside the barrel, the heating assembly is connected to the side wall of the barrel, and the barrel has a discharge port at its end. The extrusion mechanism includes a die head and a filter assembly. The die head is connected to the discharge port, and the side wall of the die head is provided with an insertion hole through which the filter assembly can extend into the interior of the die head.

[0005] A thin film recycling and melting apparatus according to an embodiment of the present invention has at least the following beneficial effects: The filter assembly extends easily into the extrusion chamber through the insertion port, dividing the chamber into front and rear sections. During extrusion, molten plastic first enters the front of the extrusion chamber from the outlet, then undergoes effective filtration by the filter assembly before flowing into the rear section, and finally being extruded and shaped through the extrusion port. This filter assembly effectively removes inorganic impurities, incompletely melted foreign matter, and other undesirable substances from the molten plastic, significantly reducing the impurity content in the extruded strips of recycled material, improving the purity of the recycled material, and ensuring the quality of the strips of recycled material after melting and re-extruding waste film. Furthermore, the filter assembly can be easily pulled out from the insertion port for cleaning, complete replacement, or replacement of individual components. Compared to existing technologies, this structure makes maintenance and replacement of the filter assembly simpler and faster, allowing for completion in a shorter time, effectively reducing downtime due to filter clogging, improving production efficiency, and reducing the workload of maintenance personnel.

[0006] According to an embodiment of the present invention, a thin film recycling and melting device includes a filter assembly comprising a filter plate and a sealing block. The filter plate is connected to one side of the sealing block and can extend into the mold head through an insertion hole. The sealing block and the insertion hole can be matched and connected.

[0007] According to an embodiment of the present invention, a thin film recycling and melting device includes a filter assembly further comprising a double-acting cylinder mounted on a die head, wherein the side of the sealing block away from the filter plate is connected to the piston rod of the double-acting cylinder in a transmission connection.

[0008] According to an embodiment of the present invention, a thin film recycling and melting device includes a filter assembly comprising a sealing ring disposed on the side of the sealing block near the filter plate and surrounding the periphery of the filter plate.

[0009] According to an embodiment of the present invention, a thin film recycling and melting device is provided with a positioning groove on the side wall of the die head, and an insertion hole is provided in the positioning groove. The positioning groove and the sealing block can be matched and connected.

[0010] According to an embodiment of the present invention, a thin film recycling and melting device is provided with an exhaust port in the barrel, which is disposed through the upper side wall of the barrel.

[0011] According to an embodiment of the present invention, a thin film recycling and melting device is provided with a screw having a pressure reducing groove, and the pressure reducing groove is provided with an exhaust port.

[0012] According to an embodiment of the present invention, a thin film recycling and melting device includes a heating assembly comprising multiple heating plates, which are respectively connected to the side walls of the barrel along the circumferential direction.

[0013] According to an embodiment of the present invention, a thin film recycling and melting device has multiple heating chambers formed on the side wall of the barrel, and multiple heating plates are respectively disposed in the multiple heating chambers.

[0014] According to an embodiment of the present invention, a film recycling and melting device is provided with an inlet on the upper side wall of the barrel away from the extrusion mechanism, and a feed funnel is connected to the upper side of the inlet.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a thin film recycling and melting device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the extrusion mechanism of a thin film recycling and melting device according to an embodiment of the present invention; Figure 3 This is a top view of the feed funnel of a thin film recycling and melting device according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: Barrel 100; Inlet 110; Outlet 120; Exhaust port 130; Heating chamber 140; Melting chamber 150; Screw 200; Pressure reducing groove 210; Heating component 300; electric heating plate 310; Die head 400; positioning groove 410; insertion hole 420; extrusion port 430; extrusion cavity 440; Filter assembly 500; Filter plate 510; Sealing block 520; Sealing ring 530; Double-acting cylinder 540; Feed hopper 600; guide roller 610; Drive motor 700. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 3 This utility model provides a film recycling and melting device, including a melting mechanism and an extrusion mechanism. The melting mechanism includes a barrel 100, a screw 200, and a heating component 300. The screw 200 is rotatably disposed inside the barrel 100, and the heating component 300 is connected to the side wall of the barrel 100. The end of the barrel 100 is provided with a discharge port 120. Specifically, a melting chamber 150 is formed inside the barrel 100, and the screw 200 is rotatably disposed in the melting chamber 150, with the periphery of the spiral blades of the screw 200 and the inner wall of the barrel 100 in clearance fit. Specifically, the heating component 300 is used to heat the barrel 100, thereby heating the melting chamber 150, and can heat and melt the waste film fed into the melting chamber 150. Specifically, the end of the barrel 100 is the end of the screw 200 in the direction that pushes the waste film to move. Specifically, the end of the screw 200 away from the end of the barrel 100 is connected to a drive motor 700 for transmission.

[0023] The extrusion mechanism includes a die head 400 and a filter assembly 500. The die head 400 is connected to the discharge port 120. The side wall of the die head 400 is provided with an insertion hole 420, through which the filter assembly 500 can extend into the interior of the die head 400. Specifically, an extrusion port 430 is provided at the end of the die head 400 away from the discharge port 120, and an extrusion cavity 440 is formed inside the die head 400. The discharge port 120 and the extrusion port 430 are respectively connected to the extrusion cavity 440. Specifically, the filter assembly 500 can extend into the extrusion cavity 440 through the insertion hole 420. The filter assembly 500 matches the extrusion cavity 440 to divide the extrusion cavity 440 into front and rear parts. Molten plastic enters the front part of the extrusion cavity 440 from the discharge port 120, then flows to the rear part of the extrusion cavity 440 after being filtered by the filter assembly 500, and is then extruded out through the extrusion port 430 to form a shape. Specifically, the filter assembly 500 can also be pulled out of the socket 420 to the outside for cleaning or maintenance.

[0024] The filter assembly 500 extends into the extrusion chamber 440 through the insertion hole 420, thus dividing the extrusion chamber 440 into front and rear parts. During extrusion, molten plastic first enters the front part of the extrusion chamber 440 from the discharge port 120, then is effectively filtered by the filter assembly 500, flows into the rear part of the extrusion chamber 440, and is finally extruded and shaped through the extrusion port 430. This filter assembly 500 effectively removes inorganic impurities, incompletely melted foreign matter, and other undesirable substances from the molten plastic, thereby significantly reducing the impurity content in the strip-shaped recycled material extruded from the extrusion port 430, improving the purity of the recycled material, and ensuring the quality of the strip-shaped recycled material after melting and re-extruding the waste film. Furthermore, the filter assembly 500 can be easily pulled out from the insertion hole 420 for cleaning, overall replacement, or replacement of parts. Compared to existing technologies, this structure makes the maintenance or replacement of the filter assembly 500 simpler and faster, allowing it to be completed in a shorter time, effectively reducing downtime caused by filter assembly 500 clogging and improving production efficiency.

[0025] According to some embodiments of this application, refer to Figure 1 and Figure 2 The filter assembly 500 includes a filter plate 510 and a sealing block 520. The filter plate 510 is connected to one side of the sealing block 520. The filter plate 510 can extend into the die head 400 through the insertion hole 420. The sealing block 520 can be matched and connected to the insertion hole 420. Specifically, the filter plate 510 matches the extrusion cavity 440, and the filter plate 510 divides the extrusion cavity 440 into front and rear parts. Specifically, the sealing block 520 can cover and close the insertion hole 420.

[0026] Preferably, the filter plate 510 and the sealing block 520 are detachably connected. When the filter plate 510 is severely clogged, it can be replaced simply by removing it from the sealing block 520.

[0027] Preferably, refer to Figure 1 and Figure 2 The insertion hole 420 is located on the upper side of the die head 400. The filter plate 510 is detachably connected to the lower side of the sealing block 520. The filter plate 510 can be inserted into the extrusion chamber 440 from top to bottom through the insertion hole 420. The insertion hole 420 is located on the upper side of the die head 400. The molten plastic portion located below the insertion hole 420 has a lower relative pressure, making it more difficult for it to overflow into the external environment through the insertion hole 420.

[0028] Furthermore, the filter assembly 500 also includes a double-acting cylinder 540, which is mounted on the die head 400. The side of the sealing block 520 away from the filter plate 510 is connected to the piston rod of the double-acting cylinder 540. Specifically, the double-acting cylinder 540 is a double-acting linear cylinder, and it is connected to two solenoid valves (not shown) to control the up-and-down extension and retraction of its piston cylinder. The two solenoid valves are electrically connected to control switches (not shown). The double-acting cylinder 540 can drive the sealing block 520 and the filter plate 510 to be inserted downward into the extrusion chamber 440 through the insertion hole 420, or to be pulled upward out of the extrusion chamber 440.

[0029] Furthermore, referring to Figure 2 The filter assembly 500 includes a sealing ring 530, which is disposed on the side of the sealing block 520 near the filter plate 510 and surrounds the periphery of the filter plate 510. When the sealing block 520 is matched and connected with the socket 420, the sealing ring 530 is located between the sealing block 520 and the socket 420, further improving the sealing effect on the socket 420.

[0030] Preferably, the sealing ring 530 and the filter plate 510 are not in contact and are spaced apart. When the sealing block 520 is matched and connected with the socket 420, the sealing ring 530 is located on the outer side of the upper edge of the socket 420.

[0031] Furthermore, referring to Figure 2 The mold head 400 has a positioning groove 410 on its side wall, and the insertion hole 420 is disposed in the positioning groove 410. The positioning groove 410 can be matched and connected with the sealing block 520. The positioning groove 410 can position the sealing block 520, which helps to prevent the sealing block 520 from shaking when it is attached to the upper side of the insertion hole 420, and can further improve the sealing effect on the insertion hole 420.

[0032] According to some embodiments of this application, refer to Figure 1The barrel 100 is provided with an exhaust port 130, which penetrates the upper side wall of the barrel 100. Specifically, the exhaust port 130 connects the melting chamber 150 with the external environment. Waste film may carry a certain amount of moisture or air before entering the melting chamber 150. The exhaust port 130 can remove this air or moisture to reduce air bubbles in the final extruded strip of recycled material.

[0033] Furthermore, referring to Figure 1 The screw 200 is equipped with a pressure-reducing groove 210, which corresponds to the exhaust port 130. When the molten plastic, which is sheared, pushed, and heated in the melting chamber 150, reaches a position near the pressure-reducing groove 210, the flow rate slows down and the pressure decreases due to the presence of the pressure-reducing groove 210 on the screw 200, forming a low-pressure zone. This low-pressure zone attracts water vapor or air generated in the melting chamber 150 and discharges it to the outside through the exhaust port 130.

[0034] According to some embodiments of this application, refer to Figure 1 The heating assembly 300 includes multiple heating plates 310, which are respectively connected to the various side walls of the barrel 100 along the circumferential direction. Specifically, the heating plates 310 include electric heating mesh, asbestos wrapping, etc., and are capable of converting electrical energy into heat energy. In some embodiments, the multiple heating plates 310 are arranged around the various side walls of the barrel 100 along the circumferential direction, and the multiple heating plates 310 are attached to the various side walls of the barrel 100 along the circumferential direction.

[0035] Furthermore, referring to Figure 1 The barrel 100 has multiple heating chambers 140 formed on its sidewalls, and multiple heating plates 310 are respectively disposed in the multiple heating chambers 140. Specifically, the multiple heating chambers 140 are all disposed in each sidewall along the circumference of the barrel 100. This can improve the heating and heat preservation effect, save energy, and reduce the safety risks caused by the exposed heating plates 310.

[0036] According to some embodiments of this application, refer to Figure 1 The upper side wall of the barrel 100 away from the extrusion mechanism is provided with a feed inlet 110, and a feed funnel 600 is connected to the upper side of the feed inlet 110. Specifically, the melting chamber 150 is connected to the feed inlet 110, and the feed inlet 110 is connected to the feed funnel 600. Waste film can pass through the feed funnel 600 and the feed inlet 110 in sequence before entering the melting chamber 150.

[0037] Understandably, referring to Figure 3In some other embodiments, the inner side of the feed funnel 600 is provided with two guide rollers 610 arranged opposite each other, and both guide rollers 610 are provided with grooves. The two guide rollers 610 arranged opposite each other are used to better guide the waste film from the outside into the inside of the feed funnel 600, and can also prevent the edges and sharp corners of the feed funnel 600 from cutting the waste film, thus avoiding a continuous interruption of the waste film supply.

[0038] Working Principle: Waste film is drawn into the feed hopper 600 by a worker or robotic arm. After passing through the gap between two guide rollers 610, one end of the waste film is fed into the melting chamber 150 through the feed port 110 and comes into contact with one side of the screw 200. The drive motor 700 and multiple heating plates 310 are turned on. The drive motor 700 drives the screw 200 to rotate in the melting chamber 150, which continuously pulls the waste film into the melting chamber 150 and continuously shears the waste film. During the continuous shearing process, the multiple heating plates 310 heat the fragments of the waste film, eventually forming molten plastic. As the screw 200 rotates, it continuously pushes the molten plastic towards the tail end of the barrel 100. The molten plastic enters the extrusion chamber 440 through the discharge port 120, is filtered by the filter plate 510, and is finally extruded through the extrusion port 430 to form strips of recycled material, which are then extruded to the outside. When the filter plate 510 becomes clogged or reaches its maintenance cycle, the sealing block 520 and the filter plate 510 can be easily pulled out by the double-acting cylinder 540, making it convenient to clean, maintain or replace the filter plate 510.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A thin film recycling and melting device, characterized in that, include: The melting mechanism includes a barrel (100), a screw (200) and a heating assembly (300). The screw (200) is rotatably disposed inside the barrel (100), and the heating assembly (300) is connected to the side wall of the barrel (100). The end of the barrel (100) is provided with a discharge port (120). The extrusion mechanism includes a die (400) and a filter assembly (500). The die (400) is connected to the discharge port (120). The side wall of the die (400) is provided with an insertion hole (420). The filter assembly (500) can extend into the interior of the die (400) through the insertion hole (420).

2. The thin film recycling and melting device according to claim 1, characterized in that, The filter assembly (500) includes a filter plate (510) and a sealing block (520). The filter plate (510) is connected to one side of the sealing block (520). The filter plate (510) can extend into the mold head (400) through the insertion hole (420). The sealing block (520) and the insertion hole (420) can be matched and connected.

3. The thin film recycling and melting device according to claim 2, characterized in that, The filter assembly (500) also includes a double-acting cylinder (540), which is mounted on the die head (400), and the sealing block (520) on the side away from the filter plate (510) is connected to the piston rod of the double-acting cylinder (540) in a driving connection.

4. The thin film recycling and melting device according to claim 2, characterized in that, The filter assembly (500) includes a sealing ring (530) disposed on the side of the sealing block (520) near the filter plate (510) and surrounding the periphery of the filter plate (510).

5. A thin film recycling and melting device according to claim 4, characterized in that, The side wall of the mold head (400) is provided with a positioning groove (410), and the insertion hole (420) is provided in the positioning groove (410). The positioning groove (410) can be matched and connected with the sealing block (520).

6. The thin film recycling and melting device according to claim 1, characterized in that, The barrel (100) is provided with an exhaust port (130), which is provided through the upper side wall of the barrel (100).

7. A thin film recycling and melting device according to claim 6, characterized in that, The screw (200) is provided with a pressure relief groove (210), which is provided corresponding to the exhaust port (130).

8. A thin film recycling and melting device according to claim 1, characterized in that, The heating assembly (300) includes a plurality of heating plates (310), which are respectively connected to the various side walls of the barrel (100) along the circumferential direction.

9. A thin film recycling and melting device according to claim 8, characterized in that, The sidewall of the barrel (100) has a plurality of heating chambers (140), and a plurality of heating plates (310) are respectively disposed in the plurality of heating chambers (140).

10. A thin film recycling and melting device according to claim 1, characterized in that, The upper side wall of the barrel (100) away from the extrusion mechanism is provided with a feed inlet (110), and a feed funnel (600) is connected to the upper side of the feed inlet (110).

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