A melt filter device applied to a plastic extruder

Abstract

The utility model provides a kind of melt filtering device applied to plastic extruder, it is related to plastic processing technical field, including annular pipeline, the outer surface of the annular pipeline both ends is fixedly connected with connector, the middle part of the annular pipeline is fixedly connected with closed assembly.The utility model is rotated knob and drives transmission screw rod rotation, threaded slide block is rotated along transverse H-shaped sliding groove because of screw rod, sliding column moves in oblique sliding groove, sliding baffle is slid and is closed to one side communication hole, and make the other side lead-through hole and communication hole alignment, complete annular pipeline one side lead-through switching, when one side filter screen is blocked in production process, without stopping, the switching structure can be closed to the channel of blocked filter screen, it is disassembled and cleaned, while ensuring that the other side channel is normally filtered, maintain production continuity, significantly improve production efficiency, reduce material waste and cost increase due to shutdown.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing technology, and in particular to a melt filtration device for use in plastic extruders. Background Technology

[0002] Plastic extruders are key equipment in the plastics processing industry. Their working principle involves feeding solid plastic raw materials into the barrel through a hopper. Driven by the rotation of the screw, the plastic is gradually melted into a fluid melt through heating. This melt is then extruded through a die to form plastic products such as pipes, sheets, and profiles. During the plastic extrusion process, impurities may be introduced into the raw materials, such as incompletely plasticized plastic particles, dust introduced during raw material production, and metal fragments. If these impurities are not treated, they can cause surface defects, internal bubbles, or holes in the extruded plastic products, severely affecting their quality and performance. They can even clog the die channels and damage the extruder. Therefore, it is necessary to filter the plastic melt before extrusion. A melt filter is an important device used to remove impurities from the plastic melt and ensure its purity.

[0003] An existing melt filtering device used in plastic extruders has the following shortcomings:

[0004] Traditional melt filter devices are mostly single-channel structures. When the filter screen becomes clogged, the entire filter device must be shut down and disassembled for cleaning. This is not only cumbersome and time-consuming, but also interrupts production, resulting in material waste and reduced production efficiency. At the same time, the installation and fixing methods of traditional filter screens are complicated, and disassembly and cleaning require the use of various tools, which increases the difficulty and cost of maintenance and makes it difficult to meet the needs of high-efficiency production. Utility Model Content

[0005] This invention proposes a melt filtration device for use in plastic extruders. This device has the advantages of convenient switching of filtration channels and quick disassembly and cleaning of the filter screen, which can effectively improve production efficiency and reduce maintenance costs, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a melt filtration device for a plastic extruder, comprising an annular pipe, wherein connectors are fixedly connected to both ends of the outer surface of the annular pipe, a closing component is fixedly connected to the middle of the annular pipe, and connecting pipes are fixedly connected to both the left and right sides of the inner side of the closing component, and a filter component is provided in the middle of the connecting pipe.

[0007] The closure assembly includes a transverse H-shaped connecting frame, which is fixedly connected to the middle of the annular pipe. The transverse H-shaped connecting frame has through-holes on both its left and right sides, and these through-holes are respectively connected to the left and right sides of the annular pipe. Two connecting pipes are respectively fixedly connected to the inner left and right sides of the transverse H-shaped connecting frame and are respectively connected to the two through-holes. The transverse H-shaped connecting frame has a transverse H-shaped groove inside, and sliding baffles are slidably connected to the front and rear sides of the inner surface of the transverse H-shaped groove. The sliding baffles have openings on both their left and right sides. The device has a through hole running from front to back. A knob is rotatably connected to the top center of the transverse H-shaped connecting frame. The bottom of the knob extends through the interior of the transverse H-shaped slide groove and is fixedly connected to a transmission screw. A threaded slider is threadedly connected to the outer surface of the transmission screw. The outer surface of the threaded slider is slidably connected to the middle of the inner surface of the transverse H-shaped slide groove. Sliding columns are fixedly connected to both the front and rear sides of the threaded slider. An oblique slide groove is opened in the middle of the opposite face of the two sliding baffles. The end of the sliding column away from the threaded slider extends through the interior of the oblique slide groove and is slidably connected to the inner surface of the oblique slide groove.

[0008] Preferably, the filter assembly includes a semi-ring plate, and the outer surface of the connecting pipe is provided with an annular groove, wherein the semi-ring plate is slidably engaged with the bottom of the inner surface of the annular groove.

[0009] Preferably, a plug-in plate is fixedly connected to the middle of the inner surface of the semi-ring plate, and a filter screen is fixedly connected to the middle of the plug-in plate.

[0010] Preferably, the bottom of the inner surface of the annular slot is provided with a connecting slot, the top of the connecting slot extends through to the middle of the connecting tube, and the plug plate is slidably inserted into the inner surface of the connecting slot.

[0011] Preferably, both ends of the semi-annular card plate are rotatably connected to arc-shaped card plates, and the two arc-shaped card plates are respectively rotatably engaged on the top left and right sides of the inner surface of the annular card groove.

[0012] Preferably, a semi-stud is fixedly connected to the top of the outer surface of the arc-shaped plate, and a fastening nut is threadedly connected to the outer surfaces of the two semi-studs.

[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0014] 1. In this utility model, through the cooperation of the knob, transmission screw, threaded slider, sliding column, sliding baffle and inclined slide groove, rotating the knob drives the transmission screw to rotate, the threaded slider slides along the transverse H-shaped slide groove due to the rotation of the screw, the sliding column moves in the inclined slide groove, pushes the sliding baffle to slide, realizes the closure of the connecting hole on one side, and aligns the connecting hole on the other side with the connecting hole, and completes the switching of the single-sided conduction of the annular pipe. In the production process, when the filter screen on one side is blocked, there is no need to stop the machine. The channel where the blocked filter screen is located can be closed through this switching structure, and the filter screen can be disassembled and cleaned. At the same time, the normal filtration of the channel on the other side is ensured, production continuity is maintained, production efficiency is significantly improved, and material waste and cost increases caused by machine downtime are reduced.

[0015] 2. In this utility model, through the mutual cooperation of the semi-ring plate, the plug-in plate, the filter screen, the arc-shaped plate, the semi-studs, and the fastening nut, during installation, the plug-in plate is inserted into the connecting slot, so that the filter screen is located in the middle of the connecting pipe for melt filtration. The semi-ring plate is locked at the bottom of the annular groove. Rotating the semi-ring plate makes the arc-shaped plate lock into the top of the annular groove. After the two semi-studs are aligned, the fastening nut is screwed on to securely fix the filter screen. During disassembly, simply unscrew the fastening nut, and the arc-shaped plate will open without restriction, allowing the plug-in plate and the filter screen to be directly pulled out from the connecting slot. The whole process is simple to operate, without the need for complicated tools, which greatly reduces the difficulty of disassembling and cleaning the filter screen, improves maintenance efficiency, reduces maintenance costs, and ensures the stability and reliability of the filter screen installation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the melt filtration device of this utility model applied to a plastic extruder;

[0017] Figure 2 This is a cross-sectional structural diagram of the closure component of this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of the connecting pipe of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the filter assembly of this utility model.

[0020] Legend: 1. Annular pipe; 2. Connector; 3. Closure assembly; 31. Horizontal H-shaped connecting bracket; 32. Connecting hole; 33. Sliding baffle; 34. Through hole; 35. Knob; 36. Transmission screw; 37. Threaded slider; 38. Sliding column; 39. Angled groove; 4. Connecting pipe; 41. Annular groove; 42. Connecting slot; 5. Filter assembly; 51. Semi-annular clamping plate; 52. Insert plate; 53. Filter screen; 54. Arc-shaped clamping plate; 55. Semi-stud; 56. Fastening nut. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figure 1 and Figure 2 As shown, this utility model provides a technical solution: it includes an annular pipe 1, with connectors 2 fixedly connected to both ends of the outer surface of the annular pipe 1, a closing component 3 fixedly connected to the middle of the annular pipe 1, and connecting pipes 4 fixedly connected to the left and right sides of the inner side of the closing component 3. A filter component 5 is provided in the middle of the connecting pipe 4. The closing component 3 includes a transverse H-shaped connecting frame 31, which is fixedly connected to the middle of the annular pipe 1. The transverse H-shaped connecting frame 31 has through holes 32 on both the left and right sides, which are respectively connected to the left and right sides of the annular pipe 1. The two connecting pipes 4 are respectively fixedly connected to the left and right sides of the inner side of the transverse H-shaped connecting frame 31 and are respectively connected to the two through holes 32. The transverse H-shaped connecting frame 31 has an internal opening. It has a transverse H-shaped slide groove, and sliding baffles 33 are slidably connected to the front and rear sides of the inner surface of the transverse H-shaped slide groove. The left and right sides of the sliding baffles 33 are provided with through holes 34 that pass through from front to back. A knob 35 is rotatably connected to the top center of the transverse H-shaped connecting frame 31. The bottom of the knob 35 passes through the interior of the transverse H-shaped slide groove and is fixedly connected to a transmission screw 36. A threaded slider 37 is threadedly connected to the outer surface of the transmission screw 36. The outer surface of the threaded slider 37 is slidably connected to the middle of the inner surface of the transverse H-shaped slide groove. Sliding columns 38 are fixedly connected to the front and rear sides of the threaded slider 37. An oblique slide groove 39 is provided in the middle of the opposite surface of the two sliding baffles 33. The end of the sliding column 38 away from the threaded slider 37 passes through the interior of the oblique slide groove 39 and is slidably connected to the inner surface of the oblique slide groove 39.

[0024] The effect achieved by the entire embodiment 1 is as follows: When it is necessary to switch the filter channel, the operator turns the knob 35, which drives the transmission screw 36 to rotate. Since the threaded slider 37 is threadedly connected to the transmission screw 36, and the threaded slider 37 is restricted by the transverse H-shaped slide groove and can only slide in the slide groove, the threaded slider 37 will move along the transverse H-shaped slide groove. When the threaded slider 37 moves, it drives the sliding columns 38 on its front and rear sides to move synchronously. The sliding columns 38 slide in the inclined slide groove 39. Due to the guiding effect of the inclined slide groove 39, the sliding baffle 33 slides in a straight line in the transverse H-shaped slide groove. When the sliding baffle 33 on one side completely blocks the corresponding connecting hole 32, the guide hole 34 of the sliding baffle 33 on the other side is just aligned with the connecting hole 32, realizing the switching of the single-sided conduction of the annular pipe 1. This allows the filter component 5 on the closed side to be disassembled and cleaned, while ensuring the normal operation of the other side channel and maintaining the continuous production of the plastic extruder.

[0025] Example 2: As Figure 3 and Figure 4 As shown, this utility model provides a technical solution: the filter assembly 5 includes a semi-ring plate 51, an annular groove 41 is provided on the outer surface of the connecting pipe 4, the semi-ring plate 51 is slidably engaged with the bottom of the inner surface of the annular groove 41, a plug plate 52 is fixedly connected to the middle of the inner surface of the semi-ring plate 51, a filter screen 53 is fixedly connected to the middle of the plug plate 52, a connecting slot 42 is provided at the bottom of the inner surface of the annular groove 41, the top of the connecting slot 42 extends through to the middle of the connecting pipe 4, the plug plate 52 is slidably engaged with the inner surface of the connecting slot 42, arc-shaped plates 54 are rotatably connected to both ends of the semi-ring plate 51, the two arc-shaped plates 54 are respectively rotatably engaged with the top left and right sides of the top of the inner surface of the annular groove 41, a semi-stud 55 is fixedly connected to the top of the outer surface of the arc-shaped plates 54, and a fastening nut 56 is threadedly connected to the outer surface of the two semi-studs 55;

[0026] The overall effect of embodiment 2 is as follows: When installing the filter screen 53, the semi-ring plate 51 is placed at the bottom of the annular groove 41, and the plug plate 52 is aligned with the connecting slot 42. The plug plate 52 is inserted into the connecting slot 42. At this time, the filter screen 53 is located in the middle of the connecting pipe 4, which can filter the plastic melt passing through the connecting pipe 4. Then, the arc-shaped plates 54 at both ends of the semi-ring plate 51 are rotated so that the arc-shaped plates 54 are inserted into the top of the annular groove 41. The two half studs 55 are aligned to form a complete stud structure. Then, the fastening nut 56 is screwed onto the half studs 55 and tightened, thereby firmly fixing the semi-ring plate 51 and the filter screen 53 to the connecting pipe 4. When disassembling, simply unscrew the fastening nut 56. The arc-shaped plates 54 are unrestrained and can be rotated outward to open. Then, the plug plate 52 and the filter screen 53 can be directly pulled out from the connecting slot 42. The operation is simple and quick, and it is convenient to clean and replace the filter screen 53.

[0027] The working principle of the entire equipment is as follows: When the plastic extruder is working, the plastic melt enters the annular pipe 1 through the connector 2. At this time, the two through holes 34 of the closing component 3 are aligned with the corresponding connecting holes 32. The plastic melt enters the connecting pipe 4 through the connecting holes 32. After the impurities are filtered out by the filter screen 53 in the connecting pipe 4, it flows out from the other connector 2 through the connecting hole 32 on the other side and the annular pipe 1, and enters the subsequent molding process.

[0028] As production proceeds, when one of the filter screens 53 becomes clogged, causing an increase in melt flow resistance, the operator turns the knob 35 to close the connecting hole 32 of the channel where the clogged filter screen 53 is located through the transmission structure of the closing component 3. At the same time, the through hole 34 of the channel where the unclogged filter screen 53 is located is aligned with the connecting hole 32, and the plastic melt switches to the unclogged channel to continue filtering and extrusion, ensuring uninterrupted production.

[0029] After switching channels, the operator can clean the clogged filter screen 53 in the closed channel, unscrew the fastening nut 56, open the arc-shaped clamping plate 54, and pull out the plug plate 52 and filter screen 53 from the connecting slot 42. After cleaning the impurities on the filter screen, reinstall the filter screen 53 into the connecting pipe 4 according to the installation steps. After cleaning, if the filter screen 53 on the other side is also clogged, turn the knob 35 to switch channels again and clean the filter screen 53. Repeat this cycle to achieve continuous and efficient filtration of the plastic melt, and at the same time, conveniently and quickly complete the maintenance of the filter screen 53.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A melt filtering device for use in a plastic extruder, comprising an annular pipe (1), wherein connectors (2) are fixedly connected to both ends of the outer surface of the annular pipe (1), characterized in that: A closing component (3) is fixedly connected to the middle of the annular pipe (1), and a connecting pipe (4) is fixedly connected to both the left and right sides of the inner side of the closing component (3). A filter component (5) is provided in the middle of the connecting pipe (4). The closing assembly (3) includes a transverse H-shaped connecting frame (31), which is fixedly connected to the middle of the annular pipe (1). The transverse H-shaped connecting frame (31) has through-holes (32) on both its left and right sides. The two through-holes (32) are respectively connected to the left and right sides of the annular pipe (1). Two connecting pipes (4) are respectively fixedly connected to the left and right sides of the inner side of the transverse H-shaped connecting frame (31) and are respectively connected to the two through-holes (32). A transverse H-shaped groove is provided inside the transverse H-shaped connecting frame (31). Sliding baffles (33) are slidably connected to the front and rear sides of the inner surface of the transverse H-shaped groove. Through-holes (32) are provided on both the left and right sides of the sliding baffles (33). A through hole (34) is provided. A knob (35) is rotatably connected to the top center of the transverse H-shaped connecting bracket (31). The bottom of the knob (35) extends through the interior of the transverse H-shaped groove and is fixedly connected to a transmission screw (36). A threaded slider (37) is threadedly connected to the outer surface of the transmission screw (36). The outer surface of the threaded slider (37) is slidably connected to the middle of the inner surface of the transverse H-shaped groove. Sliding columns (38) are fixedly connected to both the front and rear sides of the threaded slider (37). An oblique groove (39) is provided in the middle of the opposite face of the two sliding baffles (33). The end of the sliding column (38) away from the threaded slider (37) extends through the interior of the oblique groove (39) and is slidably connected to the inner surface of the oblique groove (39).

2. The melt filtering device for a plastic extruder according to claim 1, characterized in that: The filter assembly (5) includes a semi-ring plate (51), and the outer surface of the connecting pipe (4) is provided with an annular groove (41). The semi-ring plate (51) is slidably engaged with the bottom of the inner surface of the annular groove (41).

3. The melt filtering device for a plastic extruder according to claim 2, characterized in that: A plug-in plate (52) is fixedly connected to the middle of the inner surface of the semi-ring plate (51), and a filter screen (53) is fixedly connected to the middle of the plug-in plate (52).

4. The melt filtering device for a plastic extruder according to claim 3, characterized in that: The bottom of the inner surface of the annular slot (41) is provided with a connecting slot (42), the top of the connecting slot (42) extends through to the middle of the connecting tube (4), and the plug plate (52) is slidably inserted into the inner surface of the connecting slot (42).

5. A melt filtering device for a plastic extruder according to claim 2, characterized in that: Both ends of the semi-circular card plate (51) are rotatably connected to arc-shaped card plates (54), and the two arc-shaped card plates (54) are respectively rotatably engaged on the top left and right sides of the inner surface of the annular card groove (41).

6. A melt filtering device for a plastic extruder according to claim 5, characterized in that: The top of the outer surface of the arc-shaped plate (54) is fixedly connected to a stud (55), and the outer surfaces of the two studs (55) are threaded together with a fastening nut (56).

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