A net type screen changer

Abstract

The present invention provides a mesh-type screen changer, wherein a feed hole penetrating through the front and rear sides is provided in the center of the screen changer body, and screen changing grooves connected with the feed hole are also penetratingly provided on both sides of the screen changer body, a filter screen is arranged in the screen changing groove, and two ends of the filter screen extend out of the screen changer body and are respectively connected to a winding disk and an unwinding disk, and the movement of the sliding translation mechanism is carried out under the adjustment of a correction mechanism, and the correction mechanism drives the sliding translation mechanisms on both sides to move so that the plane formed by the filter screen is perpendicular to the axis direction of the feed hole. The present application arranges a sliding translation mechanism at the bottom of the winding disk and the unwinding disk, and adjusts the movement of the sliding translation mechanism through the correction mechanism, so that during the winding and unwinding process, the filter screen does not undergo angular deviation, and the plane formed by the filter screen is always parallel to the axis of the feed hole. This arrangement minimizes the friction damage between the filter screen and the screen changer body, thereby extending the service life of the filter screen.

Description

Technical Field

[0001] The invention relates to the technical field of screen changers, in particular to a screen type screen changer. Background Art

[0002] A fully automatic belt-type screen changer with announcement number "CN214872575U" in the prior art includes a screen changer body, a first support block, a second support block, a third support block, a fourth support block, a first winding frame, a second winding frame and a filter screen, wherein the screen changer body is placed in the center of the top of the first support block, a control console is installed in the center of the top of the screen changer body, and a feed hole is opened through the center of the front of the screen changer body; the fully automatic belt-type screen changer of the utility model, by providing a first winding frame in cooperation with a second winding frame and a second drive motor, the replaced filter screen can be better wound up, and at the same time, by providing a transmission belt and a first drive motor in cooperation with a drive rod, a limit rod and a brush, one side of the filter screen can be effectively and quickly cleaned.

[0003] Although the above-mentioned device realizes fast screen changing, the fully automatic belt-type screen changer still has obvious defects during use: since the diameter of the winding reel and the unwinding reel will gradually increase and the diameter of the unwinding reel will gradually decrease during the winding and unwinding process, the filter screen will be offset by a certain angle relative to the filter plane during the winding and unwinding process. This offset causes the filter screen to directly come into frictional contact with the screen changer body, which may cause the screen changer body and the filter screen to wear out and become scrapped in the long run, which is not conducive to extending the service life of the filter screen. Summary of the invention

[0004] The object of the present invention is to provide a mesh screen changer to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A screen-type screen changer comprises a screen changer body, a feed hole penetrating through the front and rear sides of the screen changer body is provided in the center of the screen changer body, screen changing slots communicating with the feed hole are also penetrating through the two sides of the screen changer body, a filter screen is arranged in the screen changing slot, two ends of the filter screen extend out of the screen changer body and are respectively connected to a winding reel and an unwinding reel, a sliding translation mechanism is provided at the bottom of the winding reel and the unwinding reel, the sliding translation mechanism drives the winding reel and the unwinding reel to move parallel to the axis direction of the feed hole, the movement of the sliding translation mechanism is carried out under the adjustment of a deviation correction mechanism, and the deviation correction mechanism drives the sliding translation mechanisms on both sides to move so that the plane formed by the filter screen is perpendicular to the axis direction of the feed hole.

[0007] Preferably, the rotating shaft of the winding disc is fixedly connected to the output shaft of the reducer, and the input shaft of the reducer is fixedly connected to the winding motor.

[0008] Preferably, the sliding translation mechanism includes a sliding block, which is movably connected to the winding disk or the unwinding disk through a rotating shaft seat, and the sliding block is slidably arranged in a sliding groove opened on the workbench. The screen changer body is fixedly connected to the workbench through a support member, and the sliding block is connected to the translation screw through a threaded hole opened at the bottom, and one end of the translation screw is fixedly connected to the driving shaft of the translation motor, and the translation motor is fixedly installed on one side of the workbench.

[0009] Preferably, the correction mechanism for adjusting the movement of the sliding translation mechanism includes an extrusion matching roller, wherein the extrusion matching roller respectively abuts against the winding reel or the unwinding reel, the extrusion matching roller is arranged in the plane direction formed by the screen changing slot, the extrusion matching roller is movably arranged on the roller frame, and pushing blocks are also arranged at the upper and lower ends of the extrusion matching roller, and the pushing blocks are connected to the extrusion spring at one end away from the extrusion matching roller, and the extrusion spring is connected to the roller frame at one end away from the pushing block, and a spring contact switch is fixedly connected to the side of the pushing block, and a forward matching switch and a backward matching switch are fixedly installed on the roller frames on the front and rear sides of the sliding direction of the pushing block, and the radius of the winding reel and the unwinding reel increases or decreases during the winding and unwinding process, pushing the extrusion matching roller forward or backward, and the extrusion matching roller contacts the corresponding forward matching switch or backward matching switch during the forward or backward movement, and the translation motor performs corresponding forward or reverse rotation during the conduction of the forward matching switch or the backward matching switch, and the forward or reverse rotation of the translation motor drives the sliding block to perform forward and backward translational sliding.

[0010] Preferably, heating plates are provided on both sides of the screen changing slot of the screen changer body located on one side of the unwinding reel.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present application sets a sliding and translational mechanism at the bottom of the winding reel and the unwinding reel, and adjusts the movement of the sliding and translational mechanism through the correction mechanism, so that during the winding and unwinding process, the filter screen does not have an angular deviation phenomenon, and the plane formed by the filter screen is always parallel to the axis of the feed hole. This arrangement minimizes the friction damage between the filter screen and the screen changer body, thereby extending the service life of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0014] Figure 2 It is a front view schematic diagram of the overall structure of the present invention;

[0015] Figure 3 It is a schematic top view of the overall structure of the present invention;

[0016] Figure 4 It is a schematic diagram of the extrusion fitting roller connection structure of the present invention;

[0017] Figure 5 It is a schematic diagram of the enlarged structure of region A of the present invention.

[0018] In the figure: 1 screen changer body, 2 feed hole, 3 screen changer slot, 4 filter screen, 5 take-up reel, 6 unwinding reel, 7 reducer, 8 take-up motor, 9 sliding block, 10 shaft seat, 11 workbench, 12 sliding slot, 13 support, 14 threaded hole, 15 translation screw, 16 translation motor, 17 extrusion matching roller, 18 roller frame, 19 push block, 20 extrusion spring, 21 spring contact switch, 22 forward matching switch, 23 backward matching switch, 24 heating plate. DETAILED DESCRIPTION

[0019] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-5 , the present invention provides a technical solution:

[0021] Embodiment 1:

[0022] A net-type screen changer comprises a screen changer body 1, a feed hole 2 penetrating the front and rear sides of the center of the screen changer body 1 is opened, screen changing slots 3 communicating with the feed hole 2 are also opened on both sides of the screen changer body 1, a filter screen 4 is arranged in the screen changing slot 3, two ends of the filter screen 4 extend out of the screen changer body 1 and are respectively connected to a winding reel 5 and a reel 6, a sliding translation mechanism is arranged at the bottom of the winding reel 5 and the reel 6, the sliding translation mechanism drives the winding reel 5 and the reel 6 to move parallel to the axis direction of the feed hole 2, the movement of the sliding translation mechanism is carried out under the adjustment of the deviation correction mechanism, and the deviation correction mechanism drives the sliding translation mechanisms on both sides to move so that the plane formed by the filter screen 4 is perpendicular to the axis direction of the feed hole 2.

[0023] In this embodiment, the feed hole 2 formed in the screen changer body 1 is used for the molten extruded material to pass through. In order to intercept impurities in the molten material, the traditional screen changer filters the material by installing an interception net. However, when the interception net needs to be replaced, the machine needs to be stopped for replacement, which delays the production progress. For this reason, a mobile screen changing mechanism has appeared in the prior art, which continuously intercepts and filters the molten extruded material by winding and unwinding the winding reel 5 and the unwinding reel 6. What is different from the prior art is that the present application is provided with a sliding translation mechanism at the bottom of the winding reel 5 and the unwinding reel 6, which drives the winding reel 5 and the unwinding reel 6 to extend and retract in a direction parallel to the axis of the feed hole 2 through the sliding translation mechanism, and the extension and retraction is adjusted by the correction mechanism. The plane formed by the filter screen 4 is perpendicular to the feed hole 2 through the movement of the winding reel 5 and the unwinding reel 6. In the axial direction, the friction between the filter screen 4 and the screen changer body 1 is minimal in this state, which can effectively reduce the wear between the filter screen 4 and the screen changer body 1 and extend the service life of the filter screen 4. The rotating shaft of the winding disk 5 is fixedly connected to the output shaft of the reducer 7, and the input shaft of the reducer 7 is fixedly connected to the winding motor 8. The reducer 7 is driven to work by the winding motor 8. The output power of the reducer 7 drives the winding disk 5 to rotate, and the rotation of the winding disk 5 drives the filter screen 4 to be wound, and the winding of the filter screen 4 drives the unwinding disk 5 to unwind. In order to prevent the filter screen 4 from entering the screen changing slot 3 due to the low temperature and causing the internal molten material to solidify, the screen changer body 1 is located on both sides of the screen changing slot on the side of the unwinding disk 6. The heating plate 24 is used to preheat the filter screen 4 that is about to enter the screen changing slot 3, thereby ensuring the normal progress of the filtration process.

[0024] Embodiment 2:

[0025] The sliding translation mechanism includes a sliding block 9, which is movably connected to the winding disk 5 or the unwinding disk 6 through a rotating shaft seat 10. The sliding block 9 is slidably set in a sliding groove 12 opened on a workbench 11. The screen changer body 1 is fixedly connected to the workbench 11 through a support 13. The sliding block 9 is connected to a translation screw 15 through a threaded hole 14 opened at the bottom. One end of the translation screw 15 is fixedly connected to the driving shaft of a translation motor 16. The translation motor 16 is fixedly installed on one side of the workbench 11. In this embodiment, the translation motor 16 serves as a power mechanism of the sliding translation mechanism. The translation screw 15 is driven to rotate by the rotation of the translation motor 16. The rotation of the translation screw 15 drives the sliding block 9 to translate. The translation of the sliding block 9 drives the winding disk 5 or the unwinding disk 6 installed thereon to translate and slide.

[0026] Embodiment three:

[0027] The correction mechanism for adjusting the movement of the sliding translation mechanism includes an extrusion matching roller 17, which is respectively against the winding reel 5 or the unwinding reel 6, and is arranged in the plane direction formed by the screen changing slot 3. The extrusion matching roller 17 is movably arranged on the roller frame 18. Pushing blocks 19 are also arranged at the upper and lower ends of the extrusion matching roller 17. The end of the pushing block 19 away from the extrusion matching roller 17 is connected to the extrusion spring 20, and the end of the extrusion spring 20 away from the pushing block 19 is connected to the roller frame 18. A spring contact switch 21 is fixedly connected to the side of the push block 19, and a forward cooperation switch 22 and a backward cooperation switch 23 are fixedly installed on the roller frame 18 on both sides of the sliding direction of the push block 19. The radius of the winding disk 5 and the unwinding disk 6 increases or decreases during the winding and unwinding process to push the extrusion cooperation roller 17 forward or backward. The extrusion cooperation roller 17 contacts the corresponding forward cooperation switch 22 or backward cooperation switch 23 during the forward or backward movement. The translation motor 16 performs the corresponding operation during the conduction of the forward cooperation switch 22 or the backward cooperation switch 23. The translation motor 16 rotates forward or backward to drive the sliding block 9 to slide forward and backward. In this embodiment, the extrusion-matching roller 17 is tightly attached to one side of the winding disk 5 or the unwinding disk 6 under the action of the extrusion spring 20. This operation not only ensures the stability during the unwinding process, but also monitors the radius of the winding disk 5 or the unwinding disk 6 in real time. When the radius of the winding disk 5 increases, the winding disk 5 squeezes the extrusion-matching roller 17 to move away from the axis of the winding disk 5. At this time, the spring contact switch 21 is moved together with the extrusion-matching roller 17. The movement finally contacts the forward movement matching switch 22. At this time, the driving circuit of the translation motor 16 is turned on, and the translation motor 16 drives the winding drum 5 to move to the side away from the extrusion matching roller 17, so that the tangent of the winding drum 5 coincides with the plane formed by the screen changing slot 3. Similarly, when the diameter of the unwinding drum 6 is reduced, the spring contact switch 21 contacts the backward movement matching switch 23. At this time, the translation motor 16 drives the unwinding drum 6 to move to the side close to the extrusion matching roller 17, and finally realizes that the plane formed by the filter screen 4 is perpendicular to the axial direction of the feed hole 2.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A net-type screen changer, comprising a screen changer body, wherein a feed hole is provided in the center of the screen changer body and penetrates through the front and rear sides, and screen change slots are provided on both sides of the screen changer body and communicate with the feed hole, wherein a filter screen is arranged in the screen change slot, and the two ends of the filter screen extend out of the screen changer body and are respectively connected to a winding reel and an unwinding reel, wherein the characteristics are as follows: The bottom of the winding disk and the unwinding disk are both provided with a sliding translation mechanism, and the sliding translation mechanism drives the winding disk and the unwinding disk to move parallel to the axis direction of the feed hole. The movement of the sliding translation mechanism is regulated by the deviation correction mechanism, and the deviation correction mechanism drives the sliding translation mechanisms on both sides to move so that the plane formed by the filter screen is perpendicular to the axis direction of the feed hole; The sliding translation mechanism includes a sliding block, which is movably connected to the winding disk or the unwinding disk through a rotating shaft seat, and the sliding block is slidably arranged in a sliding groove provided on the workbench, and the screen changer body is fixedly connected to the workbench through a supporting member, and the sliding block is connected to the translation screw rod through a threaded hole provided at the bottom, and one end of the translation screw rod is fixedly connected to the driving shaft of the translation motor, and the translation motor is fixedly installed on one side of the workbench; The correcting mechanism for adjusting the movement of the sliding translation mechanism includes an extrusion matching roller, wherein the extrusion matching roller abuts against the winding reel or the unwinding reel respectively, the extrusion matching roller is arranged in the plane direction formed by the screen changing slot, the extrusion matching roller is movably arranged on the roller frame, and pushing blocks are also arranged at the upper and lower ends of the extrusion matching roller, and the pushing block is connected to the extrusion spring at one end away from the extrusion matching roller, and the extrusion spring is connected to the roller frame at one end away from the pushing block, and a spring contact switch is fixedly connected to the side of the pushing block, and a forward matching switch and a backward matching switch are fixedly installed on the roller frames on the front and rear sides of the sliding direction of the pushing block, and the radius of the winding reel and the unwinding reel increases or decreases during the winding and unwinding process to push the extrusion matching roller forward or backward, and the extrusion matching roller contacts the corresponding forward matching switch or backward matching switch during the forward or backward movement, and the translation motor performs corresponding forward or reverse rotation during the conduction of the forward matching switch or the backward matching switch, and the forward or reverse rotation of the translation motor drives the sliding block to perform forward and backward translational sliding.

2. A screen changer according to claim 1, characterized in that: The rotating shaft of the winding disc is fixedly connected to the output shaft of the reducer, and the input shaft of the reducer is fixedly connected to the winding motor.

3. A screen changer according to claim 1 or 2, characterized in that: The screen changer body is also provided with heating plates on both sides of the screen changing slot located on one side of the unwinding disk.

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