Rapid filter sheet replacing device of plastic film extruder

Abstract

The utility model provides a quick filter plate replacing device of a plastic film extruder, which belongs to the technical field of plastic film production and comprises a shell, a filter plate replacing component and a plurality of groups of filter plates. A sealing anti-leakage assembly is arranged between the melt channel and the filtering disc and comprises sealing clamping sleeves on the upper side and the lower side, one side of each sealing clamping sleeve is movably connected with a telescopic clamping piece, and clamping protrusions are arranged on the sides, corresponding to the filtering disc, of the telescopic clamping pieces on the two sides. A plurality of clamping grooves are formed in the positions, corresponding to the clamping protrusions, of the two sides of the filtering disc, a plurality of filtering pieces are detachably installed on the filtering disc, a protruding shaft is arranged on the other side of the telescopic clamping piece, and the other end of the protruding shaft is fixedly connected with the output end of an electric push rod. According to the utility model, the problem of poor sealing performance between the melt channel and the filter sheet can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic film production, and specifically relates to a quick filter plate replacement device for a plastic film extruder. Background Technique

[0002] In the production process of plastic films, a plastic film extruder is one of the key devices. The role of the extruder is to heat and melt plastic raw materials and form a continuous film through the extrusion process. In order to ensure the purity of the extruded plastic melt and avoid the adverse effects of impurities on the film performance and quality, a filtering device is usually set in the extruder.

[0003] The main purpose of the plastic film extruder filtering device in the prior art is to filter the melt and remove impurities and unmelted particles therein. Through the action of the filter plate, the quality and performance of the plastic film can be improved, and the appearance of defects and flaws can be reduced.

[0004] Chinese Patent with the publication number: CN205969896U (application number: CN201621041411.6) discloses a plastic film extruder filtering device, which includes a pressure sensor for monitoring the pressure of the plastic melt, a controller for receiving the pressure signal of the pressure sensor and controlling the filter disc driving mechanism and an alarm, and an alarm for emitting sound or light. The pressure sensor is arranged on the melt channel and between the feed inlet and the filter plate on the melt channel. The controller and the alarm are arranged on the housing. The pressure sensor, the alarm and the filter disc driving mechanism are respectively electrically connected to the controller; it can realize timely replacement of the filter plate according to the pressure change and avoid affecting the production quality of the film. However, when the filter plate is blocked, the pressure on the feed inlet side of the melt channel increases, which easily causes the melt to leak. Therefore, there is a problem of poor sealing between the melt channel and the filter plate. Content of the Utility Model

[0005] In view of this, the utility model provides a quick filter plate replacement device for a plastic film extruder, which can solve the problem of poor sealing between the melt channel and the filter plate.

[0006] The utility model is realized as follows:

[0007] The present utility model provides a rapid filter sheet replacement device for a plastic film extruder, which includes a housing, a filter disc replacement assembly, and multiple groups of filter discs. A melt channel is arranged inside the housing. Among them, a sealing and leakage prevention assembly is arranged between the melt channel and the filter disc. The sealing and leakage prevention assembly includes sealing sleeves on the upper and lower sides. One side of the sealing sleeve is movably connected with a telescopic clamping member. On one side corresponding to the filter disc of the two telescopic clamping members, there are clamping protrusions. Multiple groups of clamping grooves are respectively arranged on both sides of the filter disc corresponding to the positions of the clamping protrusions. Multiple groups of filter sheets are detachably installed on the filter disc. On the other side of the telescopic clamping member, there is a convex shaft, and the other end of the convex shaft is fixedly connected with the output end of the electric push rod.

[0008] The technical effects of the rapid filter sheet replacement device for a plastic film extruder provided by the present utility model are as follows: By setting the sealing and leakage prevention assembly, it is used to strengthen the sealing between the melt channel and the filter sheet, prevent blockage of the filter sheet resulting in accumulation on one side of the melt channel, and prevent melt leakage caused by increased pressure. By setting the sealing sleeves on the upper and lower sides and the telescopic clamping members, and using the cooperation of the clamping protrusions and the clamping grooves on the filter disc, it can effectively prevent melt leakage during the operation of the filter disc, ensuring the stability of the extruder operation and the product quality. By setting the electric push rod to drive the convex shaft on one side of the telescopic clamping member to perform telescopic displacement, the clamping protrusions on the telescopic clamping member are clamped and sealed corresponding to the clamping grooves, achieving the sealing effect.

[0009] On the basis of the above technical solutions, the rapid filter sheet replacement device for a plastic film extruder of the present utility model can also be improved as follows:

[0010] Among them, the clamping protrusion is made of heat-resistant rubber material, and a rotating shaft is arranged at the center of the filter disc. One end of the rotating shaft is fixedly connected with the output shaft of the motor.

[0011] The beneficial effects of adopting the above improvement scheme are: By setting the clamping protrusion made of heat-resistant rubber material, it can be effectively used for the sealing of the heated melt. By setting the motor to drive the filter disc.

[0012] Furthermore, the other end of the rotating shaft is rotationally connected with the inside of the housing through a coupling seat.

[0013] Furthermore, a film replacement bin is arranged on one side of the housing, and the top of the film replacement bin is movably connected with a cover body.

[0014] The beneficial effects of adopting the above improvement scheme are: By setting the film replacement bin and the cover body, it is used to replace the filter sheets on the filter disc.

[0015] Furthermore, four groups of installation grooves are arranged on the filter disc, and the filter sheets are installed on the filter disc corresponding to the positions of the installation grooves.

[0016] Further, the card slots are opened on both sides of the filter plate close to each group of the mounting slots.

[0017] The beneficial effects of adopting the above improvement scheme are as follows: By providing the card slots, it is used to cooperate with the card protrusions to achieve the sealing effect of the melt.

[0018] Further, a group of limiting grooves are opened on the outer sides of the positions of the mounting slots, and a group of laser emitters are arranged on the bottom walls of the limiting grooves.

[0019] Further, a group of photoelectric sensors are arranged inside the housing close to the position of the sealing bushing, and the photoelectric sensors are used to sense the position of the laser beam.

[0020] Further, a controller is arranged inside the housing, and the controller is electrically connected to the photoelectric sensor and the motor respectively.

[0021] The beneficial effects of adopting the above improvement scheme are as follows: By providing the laser emitter and the photoelectric sensor, it is used to enable the photoelectric sensor to position the rotation of the filter plate according to the laser beam emitted by the induction laser emitter, and cooperate with the controller to control the motor to stop rotating, so that the card protrusions correspond to the positions of the card slots.

[0022] Further, heat dissipation grilles are opened on the cover body.

[0023] Compared with the prior art, the beneficial effects of a quick filter sheet replacement device for a plastic film extruder provided by the present utility model are as follows: By providing a sealing and leakage prevention assembly, it is used to strengthen the sealing between the melt channel and the filter sheet, prevent the filter sheet from being blocked, resulting in the accumulation on one side of the melt channel and the increase in pressure leading to melt leakage. By providing the sealing bushings on the upper and lower sides and the telescopic telescopic card members, and using the cooperation of the card protrusions and the card slots on the filter plate, it can effectively prevent the filter plate from causing melt leakage during operation, ensuring the stability of the extruder operation and the product quality. By providing the electric push rod to drive the convex shaft on one side of the telescopic card member to perform telescopic displacement, the card protrusions on the telescopic card member are engaged and sealed with the card slots to achieve the sealing effect; By providing the laser emitter and the photoelectric sensor, it is used to enable the photoelectric sensor to position the rotation of the filter plate according to the laser beam emitted by the induction laser emitter, and cooperate with the controller to control the motor to stop rotating, so that the card protrusions correspond to the positions of the card slots. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Schematic structural diagram of a quick filter sheet replacement device for a plastic film extruder;

[0026] Figure 2 is Figure 1 the enlarged schematic diagram of part A in

[0027] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0028] 10. Housing; 11. Filter disc; 12. Filter disc replacement assembly; 13. Melt channel; 14. Sealing and leakage prevention assembly; 15. Sealing bushing; 16. Telescopic clamping member; 17. Clamping projection; 18. Clamping groove; 19. Filter sheet; 20. Convex shaft; 21. Electric push rod; 22. Motor; 23. Coupling seat; 24. Sheet replacement bin; 25. Cover body; 26. Laser emitter; 27. Photoelectric sensor. Specific embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the attached drawings in the embodiments of the present utility model.

[0030] As Figure 1 , shown in FIG. 2, is an embodiment of a quick filter sheet replacement device for a plastic film extruder provided by the present utility model. In this embodiment, it includes a housing 10, a filter disc replacement assembly 12, and multiple groups of filter discs 11. A melt channel 13 is provided inside the housing 10. Among them, a sealing and leakage prevention assembly 14 is provided between the melt channel 13 and the filter disc 11. The sealing and leakage prevention assembly 14 includes sealing bushings 15 on the upper and lower sides. One side of the sealing bushing 15 is movably connected to a telescopic clamping member 16. Clamping projections 17 are provided on the corresponding sides of the two telescopic clamping members 16 for the filter disc 11. Multiple groups of clamping grooves 18 are provided on both sides of the filter disc 11 corresponding to the positions of the clamping projections 17. Multiple groups of filter sheets 19 are detachably installed on the filter disc 11. The other side of the telescopic clamping member 16 is provided with a convex shaft 20, and the other end of the convex shaft 20 is fixedly connected to the output end of the electric push rod 21.

[0031] Among them, the melt channel 13 includes a feed port and a discharge port. A pressure sensor is provided on the inner wall of the feed port close to the filter sheet 19, and the pressure sensor is electrically connected to an alarm on the housing 10.

[0032] During use, the melt flows through the melt channel 13, and the filter sheet 19 on the filter disc 11 filters the melt. At this time, the clamping projection 17 is in close contact with the clamping groove 18 to seal the melt. When the pressure sensor detects a pressure change and issues an alarm through the alarm, the filter sheet 19 can be replaced. When replacing, first start the electric push rod 21 to drive the telescopic clamping member 16 away from the filter disc 11, start the motor 22 through the controller to drive the filter disc 11 to rotate. When the adjacent group of filter sheets 19 reaches the position corresponding to the melt channel 13, the photoelectric sensor 27 senses the laser beam emitted by the laser emitter 26, and the controller controls the motor 22 to stop rotating. At this time, then drive the clamping projection 17 on the telescopic clamping member 16 to be in close contact with the clamping groove 18 through the electric push rod 21 to complete the replacement of the filter sheet 19.

[0033] Among them, in the above technical solution, the clamping projection 17 is made of heat-resistant rubber material, and a rotating shaft is provided at the center of the filter disc 11. One end of the rotating shaft is fixedly connected to the output shaft of the motor 22.

[0034] Further, in the above technical solution, the other end of the rotating shaft is rotatably connected to the inside of the housing 10 through a coupling seat 23.

[0035] Further, in the above technical solution, a film-changing bin 24 is provided on one side of the housing 10, and a cover body 25 is movably connected to the top of the film-changing bin 24.

[0036] Among them, by opening the cover body 25, the used filter sheet 19 can be replaced corresponding to the film-changing bin 24.

[0037] Further, in the above technical solution, four groups of installation grooves are provided on the filter disc 11, and the filter sheet 19 is installed corresponding to the installation groove position on the filter disc 11.

[0038] Further, in the above technical solution, the clamping groove 18 is provided on both sides of the filter disc 11 close to each group of installation grooves.

[0039] Further, in the above technical solution, a group of limit grooves are provided on the outside of the installation groove position, and a group of laser emitters 26 are provided on the bottom wall of the limit groove.

[0040] Further, in the above technical solution, a group of photoelectric sensors 27 are provided inside the housing 10 near the sealing collar 15, and the photoelectric sensors 27 are used to sense the position of the laser beam.

[0041] Further, in the above technical solution, a controller is provided inside the housing 10, and the controller is electrically connected to the photoelectric sensor 27 and the motor 22 respectively.

[0042] Further, in the above technical solution, heat dissipation grilles are provided on the cover body 25.

[0043] Specifically, the principle of the present utility model is as follows: during use, the melt flows through the melt channel 13, and the filter sheet 19 on the filter disc 11 filters the melt. At this time, the clamping protrusion 17 is in close contact with the clamping groove 18 to achieve the sealing of the melt. When the pressure sensor detects a pressure change and issues an alarm through the alarm, the filter sheet 19 can be replaced. When replacing, first, the electric push rod 21 is activated to drive the telescopic clamping member 16 away from the filter disc 11, and the motor 22 is activated by the controller to drive the filter disc 11 to rotate. When the filter sheet 19 of the adjacent group reaches the position corresponding to the melt channel 13, the photoelectric sensor 27 senses the laser beam emitted by the laser emitter 26, and the controller controls the motor 22 to stop rotating. At this time, the clamping protrusion 17 on the telescopic clamping member 16 is then driven by the electric push rod 21 to be in close contact with the clamping groove 18, completing the replacement of the filter sheet 19.

Claims

1. A filter disc quick-change device for a plastic film extruder, comprising a housing (10), a filter disc change assembly (12) and a plurality of filter discs (11), wherein a melt channel (13) is arranged inside the housing (10), characterized in that: A sealing and leak-proof component (14) is provided between the melt channel (13) and the filter disc (11), and the sealing and leak-proof component (14) comprises sealing sleeves (15) on upper and lower sides, one side of the sealing sleeve (15) is movably connected with a telescopic clamp (16), and the telescopic clamps (16) on both sides are provided with a clamping protrusion (17) corresponding to one side of the filter disc (11), and the two sides of the filter disc (11) are provided with a plurality of groups of clamping grooves (18) corresponding to the positions of the clamping protrusion (17), and the filter disc (11) is provided with a plurality of groups of filter sheets (19) detachably mounted thereon, and the other side of the telescopic clamp (16) is provided with a convex shaft (20), and the other end of the convex shaft (20) is fixedly connected to the output end of the electric push rod (21).

2. The filter sheet quick-change device for a plastic film extruder according to claim 1, characterized in that: The clamping protrusion (17) is made of heat-resistant rubber material. A rotating shaft is arranged at the center of the filter disc (11), and one end of the rotating shaft is fixedly connected to the output shaft of the motor (22).

3. The filter sheet quick-change device for a plastic film extruder according to claim 2, characterized in that: The other end of the rotating shaft is rotatably connected to the interior of the housing (10) via a coupling seat (23).

4. The filter sheet quick-change device for a plastic film extruder according to claim 3, characterized in that: A film changing bin (24) is provided on one side of the housing (10), and a cover body (25) is movably connected to the top of the film changing bin (24).

5. The filter sheet quick-change device for a plastic film extruder according to claim 4, characterized in that: The filter disc (11) is provided with four groups of mounting grooves, and the filter sheet (19) is mounted on the filter disc (11) at positions corresponding to the mounting grooves.

6. The filter sheet quick-change device for a plastic film extruder according to claim 5, characterized in that: The clamping grooves (18) are arranged on both sides of the filter disc (11) close to each group of the mounting grooves.

7. The filter sheet quick-change device for a plastic film extruder according to claim 6, characterized in that: A group of limiting grooves are provided on the outer sides of the installation grooves, and a group of laser emitters (26) are provided on the bottom walls of the limiting grooves.

8. The filter sheet quick-change device for a plastic film extruder according to claim 7, characterized in that: A group of photoelectric sensors (27) are arranged inside the housing (10) near the sealing sleeve (15), and the photoelectric sensors (27) are used to sense the position of the laser beam.

9. The filter sheet quick-change device for a plastic film extruder according to claim 8, characterized in that: A controller is arranged inside the housing (10), and the controller is electrically connected to the photoelectric sensor (27) and the motor (22) respectively.

10. The filter sheet quick-change device for a plastic film extruder according to claim 9, characterized in that: The cover body (25) is provided with a heat dissipation grille.

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