Non-stop screen changing device of extruder
By designing a non-stop network replacement device with sled and pins on the extruder, the shutdown problem of extruder when replacing the filter screen is solved, rapid replacement without affecting production capacity is achieved, and network replacement efficiency and production continuity are improved.
Patent Information
- Application Number
- CN202420921230.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-29
AI Technical Summary
Existing extruders need to be shut down when replacing the filter, resulting in reduced production efficiency and increasing the number of filters can reduce pressure changes, but cannot completely solve the problem.
A non-stop network replacement device including filter head, slider, pin and rectangular block is designed. The rapid removal and replacement of the filter through the coordination of slider and pin to ensure that the material filtration does not affect the process of network replacement. Fixed connection between rectangular blocks and pins and rubber sealing layers avoid material leakage.
The extruder has been able to change the network without stopping, improve the network switching efficiency, ensure the continuity of production capacity, and avoid the impact of network switching on pressure changes.
Smart Images
Figure CN222246033U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of extruder filtration, in particular to a non-stop screen changing device for an extruder. Background Art
[0002] In order to improve the discharge quality of the extruder, a filtering mechanism is set at the discharge port. As the extruder is used for a longer time, the filter screen is easily blocked by unmelted large particles and impurities, so the filter screen needs to be replaced regularly. The existing extruder needs to be stopped when replacing the filter screen, which delays production efficiency. In the prior art, there is an extruder with multiple groups of filter screens for filtering together. When changing the filter screen for one group of filter screens, the material can be filtered through other filter screens to achieve non-stop filtering, but this method is likely to cause the internal pressure of the extruder to increase, affecting the extrusion quality. In response to the above problem, our company has proposed a solution to reduce the pressure change amplitude as much as possible by increasing the number of filter screens, that is, the four-column four-channel filter cartridge filter for the extruder disclosed in the announcement number CN205674458U. Although this solution can reduce the impact of changing the screen on the pressure change of the extruder, it cannot fundamentally solve the occurrence of this problem. For this reason, our company changed the design idea and re-improved the extruder screen changing structure to achieve non-stop screen changing of the extruder without generating pressure changes. Utility Model Content
[0003] In view of the above situation, in order to overcome the defects of the prior art, the utility model adopts a non-stop screen changing device for the extruder, which solves the problem of pressure change when the extruder changes the screen in the prior art.
[0004] The technical solution is to provide a non-stop screen changing device for an extruder, comprising a filter head, a through hole penetrating the front and rear end faces in the middle of the filter head, an extruder head being fixed at the front end of the through hole, a through slot penetrating the left and right end faces and the through hole in the filter head, the through hole being located in the middle of the through slot, a slide plate capable of sliding left and right along the through slot being arranged in each through slot, the four upper and lower front and rear end faces of the slide plate being fitted with the through slot, an opening being arranged in the middle of each slide plate, a filter screen being fixed inside the opening, a first blind hole being arranged in each adjacent end face of two slide plates, a rectangular block being arranged between the two first blind holes, the left and right ends of the rectangular block being respectively arranged in the first blind holes on both sides, a second blind hole being arranged in the middle of the front end face of each slide plate located in the first blind hole, a pin shaft capable of moving forward and backward being arranged in each second blind hole, the front end of the pin shaft extending out of the second blind hole and being able to limit the rectangular block from moving out of the first blind hole, the movement restriction of the rectangular block being released after the pin shaft moves backward, and when the pin shaft moves to the through slot position, the pin shaft on the same side of the through slot can release the restriction on the rectangular block.
[0005] The middle portion of the second blind hole intersects with the middle portion of the first blind hole and is connected to each other. A vertical groove penetrating the upper and lower end faces is provided on the rear end face of the rectangular block. A horizontal hole penetrating the left and right end faces is provided on each pin shaft. The left and right ends of the rectangular block penetrate the horizontal holes respectively. When the front end of the pin shaft extends out of the second blind hole, the rear end of the pin shaft is placed in the vertical groove and fits with the side wall of the adjacent end of the vertical groove, limiting the rectangular block from moving out of the first blind hole. When the front end of the pin shaft extends into the inner side of the second blind hole, the horizontal hole is coaxial with the first blind hole, and the rear end of the pin shaft no longer blocks the rectangular block.
[0006] The front end face of each pin shaft is a slope. When the pin shaft moves to the through-slot position on the adjacent side, the front end face of the through-slot can squeeze the pin shaft toward the inside of the second blind hole through the slope, so that the front end of the pin shaft is placed inside the second blind hole. When the pin shaft moves to the through-slot position on the opposite side, the pin shaft can prevent the slide plate from continuing to move into the through-slot.
[0007] A compression spring is arranged between the rear end surface of each pin shaft and the second blind hole, and the compression spring always makes the front end of the pin shaft extend out of the second blind hole.
[0008] The left and right end surfaces of the filter head are located on the front and rear sides of the through slot and a clamping ring is fixed on each of them. The two clamping rings on the same side are coaxially arranged. A stop rod is arranged on the left and right sides of the filter head respectively. Each stop rod is inserted into the two clamping rings on the corresponding side. The stop rod can prevent the slide plate from moving out of the through slot.
[0009] A hand pull rod is fixed to the outer end surface of each slide plate, and the hand pull rod is a U-shaped rod with an opening facing the slide plate.
[0010] The front and rear upper and lower end surfaces of each slide plate are respectively provided with a rubber sealing layer, so that the slide plate and the through slot are interference-fitted to prevent leakage of materials between the through slot and the slide plate.
[0011] The upper and lower heights of the through grooves are greater than the upper and lower heights of the through holes, the left and right widths of the slide plates are greater than the left and right widths of the through holes, and the cross-sectional size of each filter screen is equal to the cross-sectional size of the through holes.
[0012] Compared with the prior art, the utility model has the following advantages:
[0013] 1. Through the transverse holes on the pin shaft at both ends of the rectangular block, and through the rear end of the pin shaft placed in the vertical groove to limit the rectangular block from separating from the first blind hole, the fixed connection between the left and right slide plates is realized. When the pin shaft moves to the position of the through groove on one side, the front inclined surface can move backward under the extrusion of the front wall of the through groove to contact the movement limit of the rectangular block, so that the two slide plates are separated from each other, the filter screen can be quickly removed, and the efficiency of screen replacement is greatly improved;
[0014] 2. The upper and lower heights of the slot are greater than the upper and lower heights of the through hole, and the left and right widths of the slide are greater than the left and right widths of the through hole, so that the slide can always block the slot during movement to prevent material leakage. At the same time, it is ensured that there is always a filter screen that can cover the through hole to ensure non-stop filtration and avoid the impact of screen change on production capacity. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is the front view of the utility model.
[0016] Figure 2 It is a front sectional view of the utility model.
[0017] Figure 3 for Figure 2 A is an enlarged view of the middle image.
[0018] Figure 4 This is a front sectional view of the utility model when the slide plate is pulled out to the right.
[0019] Figure 5 for Figure 4 Enlarged view of B.
[0020] Figure 6 It is a three-dimensional diagram of the pin of the utility model. DETAILED DESCRIPTION
[0021] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.
[0022] Depend on Figures 1 to 6 The utility model includes a filter head 1, a through hole 2 penetrating the front and rear end surfaces is provided in the middle of the filter head 1, an extrusion head 3 is fixed at the front end of the through hole 2, a through groove 4 penetrating the left and right end surfaces and the through hole 2 is provided on the filter head 1, the through hole 2 is located in the middle of the through groove 4, each through groove 4 is provided with a slide plate 5 that can slide left and right along the through groove 4, the four upper and lower front and rear end surfaces of the slide plate 5 are all fitted with the through groove 4, an opening 6 is provided in the middle of each slide plate 5, a filter screen 7 is fixed inside the opening, and a first blind hole 8 is provided on the adjacent end surfaces of the two slide plates 5, respectively, and the two first blind holes 8, a rectangular block 9 is arranged between the left and right ends of the rectangular block 9, respectively, and a second blind hole 10 is opened at the middle of the first blind hole 8 on the front end surface of each slide plate 5, and a pin shaft 12 that can move forward and backward is arranged in each second blind hole 10. The front end of the pin shaft 12 extends out of the second blind hole 10 and can limit the rectangular block 9 from moving out of the first blind hole 8. After the pin shaft 12 moves backward, the movement restriction of the rectangular block 9 can be released. When the pin shaft 12 moves to the position of the through slot 4, the pin shaft 12 on the same side of the through slot 4 can release the restriction on the rectangular block 9.
[0023] The middle part of the second blind hole 10 intersects with the middle part of the first blind hole 8 and is connected to each other. A vertical groove 11 penetrating the upper and lower end faces is provided on the rear end face of the rectangular block 9. A transverse hole 13 penetrating the left and right end faces is provided on each pin shaft 12. The left and right ends of the rectangular block 9 penetrate the transverse holes 13 respectively. When the front end of the pin shaft 12 extends out of the second blind hole 10, the rear end of the pin shaft 12 is placed in the vertical groove 11 and fits with the side wall of the adjacent end of the vertical groove 11, restricting the rectangular block 9 from moving out of the first blind hole 8. When the front end of the pin shaft 12 extends into the inner side of the second blind hole 10, the transverse hole 13 is coaxial with the first blind hole 8, and the rear end of the pin shaft 12 no longer blocks the rectangular block 9.
[0024] The front end face of each of the pin shafts 12 is a bevel. When the pin shaft 12 moves to the position of the through slot 4 on the adjacent side, the front end face of the through slot 4 can squeeze the pin shaft 12 toward the inside of the second blind hole 10 through the bevel, so that the front end of the pin shaft 12 is placed inside the second blind hole 10. When the pin shaft 12 moves to the position of the through slot 4 on the opposite side, the pin shaft 12 can prevent the slide plate 5 from continuing to move into the through slot 4.
[0025] A compression spring is arranged between the rear end surface of each pin shaft 12 and the second blind hole 10 , and the compression spring always makes the front end of the pin shaft 12 extend out of the second blind hole 10 .
[0026] The left and right end surfaces of the filter head 1 are respectively fixed with a clamping ring 14 on the front and rear sides of the through groove 4, and the two clamping rings 14 on the same side are coaxially arranged. A gear rod 15 is respectively arranged on the left and right sides of the filter head 1, and each gear rod 15 is respectively inserted into the two clamping rings 14 on the corresponding side. The gear rod 15 can prevent the slide plate 5 from moving out of the through groove 4.
[0027] A hand pull rod 16 is fixed to the outer end surface of each of the slide plates 5 , and the hand pull rod 16 is a U-shaped rod with an opening facing the slide plate 5 .
[0028] The front and rear upper and lower end surfaces of each slide plate 5 are respectively provided with a rubber sealing layer, so that the slide plate 5 and the through groove 4 are interference-fitted to prevent leakage of materials between the through groove 4 and the slide plate 5 .
[0029] The vertical height of the through groove 4 is greater than the vertical height of the through hole 2, the left and right width of the slide plate 5 is greater than the left and right width of the through hole 2, and the cross-sectional size of each of the filter screens 7 is equal to the cross-sectional size of the through hole 2.
[0030] When the utility model is in use, the slide plates 5 on the left and right sides are fixed together by the rectangular block 9 and the rectangular block 9 is located in the middle of the through hole 2, and then the gear rods 15 on the left and right sides are placed in the clamping rings 14 on the corresponding sides, so that the gear rods 15 limit the slide plates 5 from moving out of the through slot 4, and then the extruder is started to make the filter screens 7 on the left and right sides filter the extruded materials until the filter screens 7 are blocked, first take out the gear rod 15 on one side, and then manually pull out the slide plate 5 through the hand pull rod 16, when the pin shaft 12 on the same side moves to the position of the through slot 4, the front end surface of the through slot 4 can be moved into the second blind hole 10 by squeezing the front end inclined surface of the pin shaft 12 until the rear end of the pin shaft 12 moves out of the vertical slot 11, and the pin shaft 12 no longer restricts the movement of the left end of the rectangular block 9, and continuing to pull the hand pull rod 16 outwards can pull the left slide plate 5 out of the through slot 4, and at this time the slide plate 5 on the opposite side just blocks the through slot on that side. 4. Due to the restriction of the pin shaft 12, the slide plate 5 on the opposite side cannot continue to move outward. At this time, the filter screen 7 on the opposite side is located in the through hole 2 and continues to filter the material. After cleaning and replacing the filter screen 7 on the pulled out slide plate 5, it is reinserted into the through groove 4. Manually or with the help of a tool, the pin shaft 12 on the slide plate 5 is pushed inward into the second blind hole 10 and the slide plate 5 is pushed inward into the through groove 4 until the rectangular block 9 is re-placed in the first blind hole 8, and then the slide plate 5 is continued to be pushed toward the middle of the through hole 2. When the two pin shafts 12 move out of the through groove 4, they can be re-extended forward from the second blind hole 10 under the action of the compression spring. The slide plates 5 on the left and right sides are fixedly connected together by the rectangular block 9 again, and then the above operation is repeated to pull the two slide plates 5 to the through groove 4 position on the other side, and the slide plate 5 on the other side is removed, replaced and reinserted, that is, the screen replacement operation of all the filter screens is completed.
[0031] The utility model arranges two left and right movable filter screens 7 at the position of the extruder head, and fixes them to each other through the cooperation of the rectangular block 9 and the pin shaft 21. After the two filter screens move to the through slot 4 on one side, the two filter screens 7 can be separated from each other, so that the filter screens 7 are easily replaced while ensuring that at least one filter screen is always covered in the through hole 2, which does not affect the filtration of the material by the extruder head, realizes the non-stop network replacement, reduces the impact of network replacement on production capacity, and the network replacement procedure is simple and efficient, which greatly improves the network replacement efficiency.
Claims
1. A non-stop screen changing device for an extruder, characterized in that: The filter head (1) comprises a filter head (1), wherein a through hole (2) penetrating the front and rear end surfaces is provided in the middle of the filter head (1), an extrusion head (3) is fixed at the front end of the through hole (2), a through groove (4) penetrating the left and right end surfaces and the through hole (2) is provided on the filter head (1), the through hole (2) is located in the middle of the through groove (4), a slide plate (5) capable of sliding left and right along the through groove (4) is provided in each through groove (4), the four upper and lower front and rear end surfaces of the slide plate (5) are all in contact with the through groove (4), an opening (6) is provided in the middle of each slide plate (5), a filter screen (7) is fixed inside the opening, and a first blind hole (8) is provided on each adjacent end surface of two slide plates (5), and a first blind hole (8) is provided between the two first blind holes (8) A rectangular block (9) is arranged between the two slide plates (5), and the left and right ends of the rectangular block (9) are respectively placed in the first blind holes (8) on both sides. A second blind hole (10) is opened at the front end surface of each slide plate (5) in the middle of the first blind hole (8). A pin shaft (12) capable of moving forward and backward is arranged in each second blind hole (10). The front end of the pin shaft (12) extends out of the second blind hole (10) and can restrict the rectangular block (9) from moving out of the first blind hole (8). After the pin shaft (12) moves backward, the movement restriction of the rectangular block (9) can be released. When the pin shaft (12) moves to the position of the through slot (4), the pin shaft (12) on the same side of the through slot (4) can release the restriction on the rectangular block (9).
2. The non-stop screen changing device for an extruder according to claim 1, characterized in that: The middle of the second blind hole (10) intersects with the middle of the first blind hole (8) and is connected to each other. A vertical groove (11) penetrating the upper and lower end faces is provided on the rear end face of the rectangular block (9). A horizontal hole (13) penetrating the left and right end faces is provided on each pin shaft (12). The left and right ends of the rectangular block (9) respectively penetrate the horizontal holes (13). When the front end of the pin shaft (12) extends out of the second blind hole (10), the rear end of the pin shaft (12) is placed in the vertical groove (11) and fits with the side wall of the adjacent end of the vertical groove (11), thereby limiting the rectangular block (9) from moving out of the first blind hole (8). When the front end of the pin shaft (12) extends into the inner side of the second blind hole (10), the horizontal hole (13) is coaxial with the first blind hole (8), and the rear end of the pin shaft (12) no longer blocks the rectangular block (9).
3. The non-stop screen changing device for an extruder according to claim 1, characterized in that: The front end surface of each pin shaft (12) is an inclined surface. When the pin shaft (12) moves to the position of the through slot (4) on the adjacent side, the front end surface of the through slot (4) can press the pin shaft (12) toward the inside of the second blind hole (10) through the inclined surface, so that the front end of the pin shaft (12) is placed inside the second blind hole (10). When the pin shaft (12) moves to the position of the through slot (4) on the opposite side, the pin shaft (12) can prevent the slide plate (5) from continuing to move into the through slot (4).
4. The non-stop screen changing device for an extruder according to claim 1, characterized in that: A compression spring is provided between the rear end surface of each pin shaft (12) and the second blind hole (10), and the compression spring always causes the front end of the pin shaft (12) to extend out of the second blind hole (10).
5. The non-stop screen changing device for an extruder according to claim 1, characterized in that: A clamping ring (14) is fixed to the left and right end surfaces of the filter head (1) at the front and rear sides of the through groove (4), respectively. The two clamping rings (14) on the same side are coaxially arranged. A stopper rod (15) is arranged on the left and right sides of the filter head (1), respectively. Each stopper rod (15) is inserted into the two clamping rings (14) on the corresponding side, and the stopper rod (15) can prevent the slide plate (5) from moving out of the through groove (4).
6. The non-stop screen changing device for an extruder according to claim 1, characterized in that: A hand pull rod (16) is fixed to the outer end surface of each of the slide plates (5), and the hand pull rod (16) is a U-shaped rod with an opening facing the slide plate (5).
7. The non-stop screen changing device for an extruder according to claim 1, characterized in that: The front and rear upper and lower end surfaces of each slide plate (5) are respectively provided with a rubber sealing layer, so that the slide plate (5) and the through groove (4) are interference-fitted to prevent leakage of materials between the through groove (4) and the slide plate (5).
8. The non-stop screen changing device for an extruder according to claim 1, characterized in that: The vertical height of the through groove (4) is greater than the vertical height of the through hole (2), the left and right width of the slide plate (5) is greater than the left and right width of the through hole (2), and the cross-sectional size of each filter screen (7) is equal to the cross-sectional size of the through hole (2).