Filtering device for plastic extruder

Abstract

The utility model relates to the technical field of filtering of plastic extruders, in particular to a filtering device for a plastic extruder, which comprises a filtering box, a communicating groove penetrating through the filtering box is formed in the filtering box, a filter screen is arranged in the communicating groove, a rotating ring penetrates through the inner wall of the filtering box, and the inner wall of the filtering box is rotatably connected with the rotating ring. The inner wall of the rotating ring is fixedly connected with a fixing frame, a plurality of evenly-distributed scraping plates are fixedly arranged on the side, close to the filter screen, of the fixing frame, the scraping plates are attached to the filter screen, and a motor is arranged in the filter box. The motor drives the driving gear to rotate, the driving gear drives the driven gear and the rotating ring to rotate so as to drive the fixing frame and the scraping plate to rotate, and the scraping plate scrapes the surface of the filter screen to take away materials blocking the filter screen from the blocking position.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic extruder filtration, in particular to a filter device for a plastic extruder. Background Art

[0002] Plastic extruder, commonly referred to as the main machine, is the core part of plastic extrusion molding equipment. It converts solid plastic into a uniform melt through pressure and shearing, melts the plastic at high temperature, and then forms the required shape through the mold. When the plastic is extruded, the plastic will be mixed with some difficult-to-melt solid impurities or large plastic particles. Therefore, the plastic extruder filter device is particularly needed to filter the material before the plastic melt enters the extruder;

[0003] Patent application number CN202320791792.3 discloses a plastic extruder filtering device, including a filtering mechanism, a cleaning mechanism and a moving mechanism, the cleaning mechanism including a pair of cleaning boxes, a spray pipe fixedly installed on one side of the interior of the cleaning box, an electromagnetic valve provided on the other side of the interior of the cleaning box, a hot air pipe sleeved on the side close to the electromagnetic valve of the cleaning box, a hot air blower fixedly installed on the top of the cleaning box, the output end of the hot air blower is connected to the hot air pipe, the filtering mechanism including a filter box, a pair of cleaning boxes respectively arranged at both ends of the filter box, a filter cavity is provided in the interior of the filter box, a moving block is slidably installed in the interior of the filter cavity, filter holes are provided on both sides of the moving block, and filter screens are installed inside the filter holes;

[0004] Although the plastic extruder filter device can effectively improve the practicality of the extruder filter device and has high practical value, when the plastic extruder filter device is filtering, the filter screen needs to be cleaned after the filtering step is completed, and the filter screen cannot be cleaned during the filtering work. The clogging of the filter screen during filtering will directly lead to a serious decrease in the filtering efficiency. It takes a long time to wait for the added material to be filtered before the filter screen can be cleaned. Utility Model Content

[0005] The purpose of the utility model is to provide a filtering device for a plastic extruder, which solves the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model discloses a filtering device for a plastic extruder, comprising a filter box, wherein the filter box is provided with a communicating groove which passes through the filter box, a filter screen is arranged in the communicating groove, an inner wall of the filter box is penetrated by a rotating ring and is rotatably connected to the rotating ring, an inner wall of the rotating ring is fixedly connected to a fixing frame, a plurality of evenly distributed scraping plates are fixedly provided on one side of the fixing frame close to the filter screen, the scraping plates are in contact with the filter screen, and a motor is arranged in the filter box.

[0008] Furthermore, the filter box is also provided with a receiving groove 1 and a receiving groove 2, the receiving groove 1 and the receiving groove 2 are connected, a driven gear is provided in the receiving groove 1, the scraper plate passes through the driven gear and is rotatably connected to the driven gear, the motor is fixedly provided in the receiving groove 2, and the transmission shaft of the motor is fixedly provided with a driving gear meshing with the driven gear.

[0009] Furthermore, an internal threaded ring is fixedly provided in the communicating groove, the internal threaded ring is threadedly connected to the external threaded ring, and the filter is fixedly connected to the inner wall of the external threaded ring.

[0010] Furthermore, a limiting ring is fixedly provided on a side of the external threaded ring away from the filter screen.

[0011] Furthermore, a discharge pipe and a feed pipe connected to the communication groove are respectively provided at both ends of the filter box, the fixing frame is arranged between the feed pipe and the filter screen, and a connecting flange is fixedly provided at one end of the discharge pipe and the feed pipe away from each other.

[0012] Furthermore, the diameter of the communicating groove, the inner diameter of the discharge pipe, the inner diameter of the feed pipe and the inner diameter of the connecting flange are all the same.

[0013] Furthermore, a plurality of heat dissipation grooves are provided on the outer wall of the filter box, and the heat dissipation grooves are communicated with the second accommodating groove.

[0014] The utility model has the following beneficial effects:

[0015] The utility model drives the driving gear to rotate by the motor, and the driving gear drives the driven gear and the rotating ring to rotate, thereby driving the fixing frame and the scraper plate to rotate. The scraper plate scrapes the surface of the filter screen to remove the material blocking the filter screen from the blocking position.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;

[0019] Figure 2 It is a partial structural sectional view of the utility model;

[0020] Figure 3 for Figure 1 Schematic diagram of the filter box structure;

[0021] Figure 4 This is a schematic diagram of the bottom structure of the filter box of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the fixing frame and the scraping plate of the utility model;

[0023] Figure 6 This is a schematic cross-sectional view of the filter box of the present invention;

[0024] Figure 7 This is a schematic diagram of the filter screen and external threaded ring structure of the utility model;

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0026] In the figure: 1. Filter box; 101. Connecting groove; 102. Accommodating groove 1; 103. Accommodating groove 2; 104. Heat dissipation groove; 2. Rotating ring; 3. Fixed frame; 4. Scraper plate; 5. Driven gear; 6. Driving gear; 7. Motor; 8. Filter; 9. Internal thread ring; 10. External thread ring; 1001. Limiting ring; 11. Discharge pipe; 12. Feed pipe; 13. Connecting flange. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] See also Figure 1-7 As shown, the utility model is a filtering device for a plastic extruder, comprising a filter box 1, the filter box 1 is provided with a connecting groove 101 passing through the filter box 1, a filter screen 8 is arranged in the connecting groove 101, the inner wall of the filter box 1 is penetrated by a rotating ring 2 and is rotatably connected to the rotating ring 2, the inner wall of the rotating ring 2 is fixedly connected to a fixing frame 3, a plurality of evenly distributed scraping plates 4 are fixedly provided on one side of the fixing frame 3 close to the filter screen 8, the scraping plates 4 are fitted with the filter screen 8, a motor 7 is arranged in the filter box 1, the filter box 1 is further provided with a receiving groove 102 and a receiving groove 2 103, the receiving groove 102 and the receiving groove 2 103 are connected, the receiving groove 10 2 is provided with a driven gear 5, the scraper plate 4 passes through the driven gear 5 and is rotatably connected to the driven gear 5, the motor 7 is fixedly provided in the accommodating groove 2 103, and the transmission shaft of the motor 7 is fixedly provided with a driving gear 6 meshing with the driven gear 5. In this embodiment, the material flows through the communicating groove 101 and is filtered through the filter screen 8. During filtering, the motor 7 is driven, and the motor 7 drives the driving gear 6 to rotate, and the driving gear 6 drives the driven gear 5 and the rotating ring 2 to rotate, thereby driving the fixed frame 3 and the scraper plate 4 to rotate. The scraper plate 4 scrapes from the surface of the filter screen 8 to remove the material that blocks the filter screen 8 from the blocking position, thereby preventing the filter screen 8 from being blocked and causing the filtration efficiency to decrease.

[0030] Furthermore, an internal threaded ring 9 is fixedly provided in the communicating groove 101, and the internal threaded ring 9 is threadedly connected to the external threaded ring 10, and the filter screen 8 is fixedly connected to the inner wall of the external threaded ring 10. In this embodiment, after the filtering work is completed, the user releases the connection between the internal threaded ring 9 and the external threaded ring 10, and takes out the external threaded ring 10 and the filter screen 8 from the filter box 1, so as to facilitate the cleaning of the filter screen 8.

[0031] Among them, a limiting ring 1001 is fixedly provided on the side of the external threaded ring 10 away from the filter 8. In this embodiment, the limiting ring 1001 plays a limiting role on the external threaded ring 10. When installing the filter 8, the external threaded ring 10 is threadedly connected with the internal threaded ring 9 until the limiting ring 1001 is in contact with the internal threaded ring 9. At this time, the filter 8 is in contact with the scraper plate 4 to prevent the filter 8 from continuing to move and being broken by the sliding plate.

[0032] Among them, the two ends of the filter box 1 are respectively provided with a discharge pipe 11 and a feed pipe 12 connected to the connecting groove 101, the fixed frame 3 is arranged between the feed pipe 12 and the filter screen 8, and the discharge pipe 11 and the feed pipe 12 are fixedly provided with a connecting flange 13 at one end away from each other. The diameter of the connecting groove 101, the inner diameter of the discharge pipe 11, the inner diameter of the feed pipe 12 and the inner diameter of the connecting flange 13 are all the same. In this embodiment, the feed pipe 12 is connected to the discharge port of the plastic extruder through the connecting flange 13, and the discharge pipe 11 is connected to the feed port of the mold through the connecting flange 13. After use, the filter device can be directly removed from between the plastic extruder and the mold for easy cleaning.

[0033] Among them, the outer wall of the filter box 1 is provided with a plurality of heat dissipation grooves 104, and the heat dissipation grooves 104 are connected to the second receiving groove 103. In this embodiment, the heat dissipation grooves 104 play a role in cooling the motor 7, thereby improving the heat dissipation efficiency of the motor 7 and preventing the motor 7 from overheating.

[0034] It can be understood that the utility model drives the driving gear 6 to rotate through the motor 7, and the driving gear 6 drives the driven gear 5 and the rotating ring 2 to rotate, thereby driving the fixed frame 3 and the scraper plate 4 to rotate, and the scraper plate 4 scrapes the surface of the filter screen 8 to remove the material blocking the filter screen 8 from the blocking position.

[0035] A specific application of this embodiment is: the filter device is installed between the plastic extruder and the mold through the connecting flange 13, the material is discharged from the plastic extruder, and then the material enters the filter box 1, is filtered through the filter screen 8, and then flows into the mold for processing. When the material is filtered, the motor 7 is driven, and the motor 7 drives the driving gear 6 to rotate, and the driving gear 6 drives the driven gear 5 and the rotating ring 2 to rotate, thereby driving the fixed frame 3 and the scraper plate 4 to rotate. The scraper plate 4 scrapes the surface of the filter screen 8 to remove the material blocking the filter screen 8 from the blocking position, preventing the filter screen 8 from being blocked and causing the filtration efficiency to decrease. After the filtration work is completed, the filter device is removed from between the plastic extruder and the mold for cleaning. After removal, the user releases the connection between the internal threaded ring 9 and the external threaded ring 10, and takes the external threaded ring 10 and the filter screen 8 out of the filter box 1, which is convenient for cleaning the filter screen 8.

[0036] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0037] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A filter device for a plastic extruder, comprising a filter box (1), characterized in that: The filter box (1) is provided with a communication groove (101) passing through the filter box (1), a filter screen (8) is arranged in the communication groove (101), the inner wall of the filter box (1) is penetrated by the rotating ring (2) and is rotatably connected to the rotating ring (2), the inner wall of the rotating ring (2) is fixedly connected to the fixed frame (3), a plurality of evenly distributed scraping plates (4) are fixedly arranged on one side of the fixed frame (3) close to the filter screen (8), the scraping plates (4) are in contact with the filter screen (8), and a motor (7) is arranged in the filter box (1).

2. A filter device for a plastic extruder according to claim 1, characterized in that: The filter box (1) is further provided with a first receiving groove (102) and a second receiving groove (103), wherein the first receiving groove (102) and the second receiving groove (103) are communicated with each other, a driven gear (5) is provided in the first receiving groove (102), the scraper plate (4) passes through the driven gear (5) and is rotationally connected to the driven gear (5), the motor (7) is fixedly provided in the second receiving groove (103), and a driving gear (6) meshingly connected to the driven gear (5) is fixedly provided on the transmission shaft of the motor (7).

3. A filter device for a plastic extruder according to claim 1, characterized in that: An internal threaded ring (9) is fixedly provided in the communicating groove (101), the internal threaded ring (9) is threadedly connected to the external threaded ring (10), and the filter screen (8) is fixedly connected to the inner wall of the external threaded ring (10).

4. A filter device for a plastic extruder according to claim 3, characterized in that: A limiting ring (1001) is fixedly provided on the side of the external threaded ring (10) away from the filter screen (8).

5. A filter device for a plastic extruder according to claim 1, characterized in that: The filter box (1) is provided with a discharge pipe (11) and a feed pipe (12) respectively at both ends thereof, both of which are connected to the communication groove (101); the fixing frame (3) is provided between the feed pipe (12) and the filter screen (8); and a connecting flange (13) is fixedly provided at one end of the discharge pipe (11) and the feed pipe (12) which is away from each other.

6. A filter device for a plastic extruder according to claim 1, characterized in that: The diameter of the communicating groove (101), the inner diameter of the discharge pipe (11), the inner diameter of the feed pipe (12), and the inner diameter of the connecting flange (13) are all the same.

7. A filter device for a plastic extruder according to claim 1, characterized in that: The outer wall of the filter box (1) is provided with a plurality of heat dissipation slots (104), and the heat dissipation slots (104) are in communication with the second accommodating slot (103).

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