Granulator non-stop automatic screen changing device

Abstract

The invention provides a non-stop automatic screen changing device for a granulator, and solves the problem that a filter screen of an existing granulator needs to be manually replaced. The scraper assembly is arranged in the filter seat and is provided with a first position in contact with the filter screen and a second position away from the filter screen; the through hole is formed in the mounting groove; the ejector rod is arranged in the through hole; the ejector pin assembly is arranged below the filter screen seat; the first net taking mechanism is arranged on one side of the ejector pin assembly; the second net taking mechanism is arranged on the other side of the ejector pin assembly. A pressure sensor is arranged in the filter seat, when the pressure of the blocking material reaches a certain value, the pressure sensor transmits a signal to the control center, the control center controls the first power element to push out the filter screen seat, the scraper assembly scrapes off the blocking material on the filter screen in the push-out process of the filter screen seat, and then the filter screen is ejected away from the mounting groove through the ejector pin assembly; the old filter screen is taken away by the second screen taking mechanism, the new filter screen is placed in the mounting groove by the first screen taking mechanism, and finally, the filter screen seat is reset.

Description

Technical Field

[0001] The invention relates to the technical field of punching equipment, and in particular to an automatic screen changing device for a granulator without stopping the machine. Background Art

[0002] During the extrusion production of polymers, the melt will produce residues after long-term plasticization and heating. Together with the impurities and unplasticized particles in the raw materials, once they enter the extrusion mold, they will cause flow channel blockage or product defects, and will also hinder normal production. Therefore, in the production of plastic extrusion, in order to filter out impurities and obtain high-quality products, a filter device will be set between the granulator and the die. However, when recycling waste plastics, due to the high content of impurities in the waste plastics, impurities will block the filter when discharging, resulting in failure of normal production and discharging, so the filter needs to be replaced regularly.

[0003] At present, the filter structure of the existing granulator is such as the plastic granulator with replaceable filter disclosed in China Patent Authorization Announcement No. CN202964970U. Two filters are set on the filter seat. The filter seat is connected to the drive device. When the filter needs to be replaced, the drive device drives the filter seat to move, pushes the new filter to the working position, and pushes out the old filter. However, when replacing the old filter, the filter needs to be done manually. First, the staff needs to remove the blockage, and then tear off the filter and stick the new filter. Since the temperature required by the granulator to plasticize the material is relatively high, there is a risk of burns when cleaning manually. Summary of the invention

[0004] In order to overcome the shortcomings of the background technology, the present invention provides an automatic screen changing device for a granulator without stopping the machine, which solves the problem that the filter screen of the current granulator needs to be replaced manually.

[0005] The technical solution adopted by the present invention is as follows: The automatic screen changing device for a granulator without stopping comprises a frame, a filter seat is installed on the frame, at least two filter seats are arranged in the filter seat, the filter seat is provided with a mounting groove for placing the filter, the frame is provided with a power element for driving the filter seat to move forward and backward, and further comprises: The scraper assembly is arranged in the filter seat and has a first position for contacting the filter screen and a second position for leaving the filter screen; A through hole is arranged in the mounting groove; A push rod is arranged in the through hole; The ejector pin assembly is arranged below the filter seat and is used to push the ejector pin upward; A No. 1 net taking mechanism is arranged on one side of the ejector assembly; The second net taking mechanism is arranged on the other side of the ejector pin assembly.

[0006] The scraper assembly comprises a rotating shaft and a No. 1 scraper mounted on the rotating shaft. The rotating shaft is provided with a feed port, and one end of the rotating shaft is provided with a discharge hole for communicating with the feed port.

[0007] The scraper assembly includes a No. 2 scraper and a No. 2 power element for driving the No. 2 scraper to rise and fall. The filter seat is provided with a material storage cavity for communicating with the rear end of the mounting groove. The frame is provided with a material baffle plate for cooperating with the material storage cavity.

[0008] The filter seat is provided with guide grooves for cooperating with two sides of the second scraper.

[0009] The ejector assembly comprises an ejector and a lifting device for driving the ejector to move up and down, and a first mounting plate is arranged between the ejector and the lifting device.

[0010] Connecting plates are arranged on both sides of the No. 1 mounting plate, a No. 2 mounting plate is arranged on the top of the connecting plate, the ejector pin is also arranged on the bottom surface of the No. 2 mounting plate, and the connecting plate is equipped with a guide rail mechanism.

[0011] There are multiple push rods, and the multiple push rods are arranged in a square array.

[0012] The No. 1 net-taking mechanism and the No. 2 net-taking mechanism both include a horizontal moving device and a vertical moving device that cooperate with each other. The No. 1 net-taking mechanism also includes an electromagnet arranged on the vertical moving device. The No. 2 net-taking mechanism also includes a No. 1 clamping plate and a No. 2 clamping plate arranged on the vertical moving device. The No. 1 clamping plate is equipped with a No. 3 power element.

[0013] A coarse filter is arranged at the feed inlet of the filter seat.

[0014] The coarse filter comprises a barrel, a filter cartridge is arranged in the barrel, a gap is arranged between the outer wall of the filter cartridge and the inner wall of the barrel, a screw is arranged in the filter cartridge, and the barrel is provided with a feed channel for communicating with the filter cartridge, a No. 1 discharge port for communicating with the filter cartridge, and a No. 2 discharge port for communicating with the feed port of the filter seat.

[0015] The beneficial effects of the present invention are: A pressure sensor is installed in the filter seat. When the pressure of the filter seat blockage reaches a certain value, the pressure sensor transmits a signal to the control center. The control center controls the No. 1 power element to push the filter seat out. During the pushing process, the scraper assembly of the filter seat scrapes off the blockage on the filter screen, and then the ejector assembly pushes the ejector rod out. The ejector rod pushes the filter screen out of the installation slot, and the No. 2 net removal mechanism takes away the old filter screen, and the No. 1 net removal mechanism places the new filter screen in the installation slot. Finally, the filter seat is reset, thereby realizing automatic screen replacement, which can not only save the company's production costs, but also improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the filter seat of the present invention.

[0018] Figure 3 Schematic diagram of the scraper assembly embodiment 1 of the present invention.

[0019] Figure 4 It is a schematic diagram of the second embodiment of the scraper assembly of the present invention.

[0020] Figure 5 It is a schematic diagram of the second embodiment of the scraper assembly of the present invention.

[0021] Figure 6 Schematic diagram of the ejector assembly of the present invention.

[0022] Figure 7 It is a schematic diagram of a No. 1 net taking mechanism and a No. 2 net taking mechanism of the present invention.

[0023] Figure 8 It is a cross-sectional schematic diagram of the coarse filter of the present invention.

[0024] Filter seat 1, filter screen seat 2, mounting groove 3, power element No. 1 4, through hole 5, ejector rod 6, ejector pin assembly 7, rotating shaft 8, scraper No. 1 9, feed port 10, discharge hole 11, scraper No. 2 12, power element No. 2 13, storage chamber 14, baffle plate 15, guide groove 16, ejector pin 71, lifting device 72, mounting plate No. 1 73, connecting plate 74, mounting plate No. 2 75, guide rail mechanism 76, horizontal moving device 17, vertical moving device 18, electromagnet 19, clamping plate No. 1 20, clamping plate No. 2 21, power element No. 3 22, barrel 23, filter cartridge 24, screw 25, feed channel 26, discharge port No. 1 27, discharge port No. 2 28. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: In the embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the automatic screen changing device for the granulator without stopping comprises a frame, the frame is equipped with a filter seat 1, at least two filter seats 2 are arranged in the filter seat 1, the filter seat 2 is provided with a mounting groove 3 for placing the filter, the frame is provided with a first power element 4 for driving the filter seat 2 to move forward and backward, and also comprises: The scraper assembly is arranged in the filter seat 1 and has a first position for contacting the filter screen and a second position for leaving the filter screen; A through hole 5 is provided in the mounting groove 3; A push rod 6 is arranged in the through hole 5; The ejector pin assembly 7 is arranged below the filter seat 2 and is used to push the ejector pin 6 upward; A first net taking mechanism is arranged on one side of the ejector assembly 7; The second net taking mechanism is arranged on the other side of the ejector assembly 7.

[0026] The No. 1 power element is a 4-position cylinder or hydraulic cylinder, and a pressure sensor is installed in the filter seat 1. When the pressure of the blockage in the filter seat 1 reaches a certain value, the pressure sensor transmits a signal to the control center, and the control center controls the No. 1 power element 4 to push out the filter seat 2. During the pushing process of the filter seat 2, the scraper assembly scrapes off the blockage on the filter screen, and then the ejector assembly 7 ejects the ejector rod 6, and the ejector rod 6 pushes the filter screen away from the installation groove 3. The No. 2 net removal mechanism takes away the old filter screen, and the No. 1 net removal mechanism places the new filter screen in the installation groove 3, and finally the filter seat 2 is reset; thereby realizing automatic net changing, which can not only save the production cost of the enterprise, but also improve work efficiency.

[0027] In the first embodiment, Figure 3 As shown, the scraper assembly includes a rotating shaft 8 and a No. 1 scraper 9 mounted on the rotating shaft 8. The rotating shaft 8 is provided with a feed port 10, and one end of the rotating shaft 8 is provided with a discharge hole 11 for communicating with the feed port 10. When the filter screen needs to be replaced and the filter screen seat 2 moves outward, the rotating shaft 8 is driven by the motor to rotate, so that the No. 1 scraper 9 contacts the filter screen, and the No. 1 scraper 9 scrapes off the blocked material, and the blocked material enters the discharge hole 11 through the feed port 10 and is then discharged.

[0028] In the second embodiment, Figure 4 , Figure 5 As shown, the scraper assembly includes a No. 2 scraper 12 and a No. 2 power element 13 for driving the No. 2 scraper 12 to rise and fall. The filter seat 2 is provided with a storage cavity 14 for communicating with the rear end of the mounting groove 3, and the frame is provided with a material baffle plate 15 for cooperating with the storage cavity 14. The No. 2 power element 13 is a cylinder or a hydraulic cylinder. When the filter needs to be replaced and the filter seat 2 moves outward, the No. 2 power element 13 drives the No. 2 scraper 12 to descend and contact the filter, and the blocked material on the filter enters the storage cavity 14; when the filter is replaced, the filter seat 2 is reset, and since the material baffle plate 15 does not move, the material in the storage cavity 14 will be pushed onto the new filter for re-filtration, so that there is no waste of molten material.

[0029] In the second embodiment, Figure 4 As shown, the filter screen seat 2 is provided with guide grooves 16 for cooperating with both sides of the second scraper 12. The straightness of the lifting and lowering of the second scraper 12 is ensured, thereby ensuring the cooperation between the second scraper 12 and the filter screen.

[0030] In the second embodiment, Figure 1 , Figure 6 As shown, the ejector assembly 7 includes an ejector 71 and a lifting device 72 for driving the ejector 71 to rise and fall, and a first mounting plate 73 is provided between the ejector 71 and the lifting device 72. The lifting device 72 is a screw lifter, which is used to drive the ejector 71 to extend into the through hole 5 to push out the ejector rod 6, thereby allowing the filter to be separated from the mounting groove 3.

[0031] The first mounting plate 73 is provided with connecting plates 74 on both sides, the top of the connecting plate 74 is provided with a second mounting plate 75, the ejector pin 71 is also provided on the bottom surface of the second mounting plate 75, and the connecting plate 74 is provided with a guide rail mechanism 76. The guide rail mechanism 76 is used to ensure the straightness of the lifting and lowering of the ejector pin 71. When the new filter is placed in the mounting groove 3, the second mounting plate 75 is lowered to completely reset the ejector pin 6 to ensure that the new filter is installed flat.

[0032] In the embodiment, Figure 2 As shown, there are multiple push rods 6, and the multiple push rods 6 are arranged in a square array. The circumference of the old filter screen can be evenly lifted up, which is convenient for the second net taking mechanism to grab.

[0033] In the embodiment, Figure 1 , Figure 7 As shown, the No. 1 net taking mechanism and the No. 2 net taking mechanism both include a horizontal moving device 17 and a vertical moving device 18 that cooperate with each other, the No. 1 net taking mechanism also includes an electromagnet 19 arranged on the vertical moving device 18, and the No. 2 net taking mechanism also includes a No. 1 clamping plate 20 and a No. 2 clamping plate 21 arranged on the vertical moving device 18, and the No. 1 clamping plate 20 is equipped with a No. 3 power element 22. The horizontal moving device 17 and the vertical moving device 18 both include a gear rack assembly, and the horizontal and vertical movements are realized by the motor driving the gear to rotate, the electromagnet 19 is used to absorb the stacked new filter screen, and the No. 3 power element 22 is a cylinder, which is used to drive the No. 1 clamping plate 20 and the No. 2 clamping plate 21 to cooperate to clamp the old filter screen on the filter screen seat 2.

[0034] In the embodiment, Figure 4 As shown, a coarse filter is provided at the feed inlet of the filter seat 1 to perform coarse filtering on the molten material and reduce the number of times the filter screen is replaced.

[0035] In the embodiment, Figure 8As shown, the coarse filter includes a barrel 23, a filter barrel 24 is arranged in the barrel 23, a gap is arranged between the outer wall of the filter barrel 24 and the inner wall of the barrel 23, a screw 25 is arranged in the filter barrel 24, and the barrel 23 is provided with a feed channel 26 for communicating with the filter barrel 24, a No. 1 discharge port 27 for communicating with the filter barrel 24, and a No. 2 discharge port 28 for communicating with the feed port of the filter seat 1. The melt enters the filter barrel 24, then flows out from the circumference of the filter barrel 24, enters the filter seat 1 through the No. 2 discharge port 28, and some large particle impurities remain in the filter barrel 24, and are discharged from the No. 1 discharge port 27 through the screw 25, so as to achieve coarse filtration of the melt, and then reach the filter screen in the filter screen seat 2 for high mesh filtering.

[0036] Obviously, the above embodiments of the present invention are merely examples for illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to exhaust all implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. An automatic screen changing device for a granulator without stopping, comprising a frame, the frame being provided with a filter seat (1), the filter seat (1) being provided with at least two filter seats (2), the filter seat (2) being provided with a mounting groove (3) for placing a filter, the frame being provided with a first power element (4) for driving the filter seat (2) to move forward and backward, characterized in that: Also includes: A scraper assembly is arranged in the filter seat (1) and has a first position for contacting the filter screen and a second position for leaving the filter screen; A through hole (5) is arranged in the mounting groove (3); A push rod (6) is arranged in the through hole (5); A push pin assembly (7) is arranged below the filter seat (2) and is used to push the push rod (6) upward; A first net taking mechanism, arranged on one side of the ejector assembly (7); The second net taking mechanism is arranged on the other side of the ejector pin assembly (7).

2. The automatic screen changing device for a granulator without stopping the machine as claimed in claim 1, characterized in that: The scraper assembly comprises a rotating shaft (8) and a first scraper (9) mounted on the rotating shaft (8); a feed port (10) is provided on the rotating shaft (8); and a discharge hole (11) for communicating with the feed port (10) is provided at one end of the rotating shaft (8).

3. The automatic screen changing device for a granulator without stopping the machine as claimed in claim 1, characterized in that: The scraper assembly comprises a second scraper (12) and a second power element (13) for driving the second scraper (12) to move up and down; the filter seat (2) is provided with a material storage cavity (14) for communicating with the rear end of the mounting groove (3); and the frame is provided with a material baffle plate (15) for cooperating with the material storage cavity (14).

4. The automatic screen changing device for a granulator without stopping the machine as claimed in claim 3, characterized in that: The filter seat (2) is provided with guide grooves (16) for cooperating with two sides of the second scraper (12).

5. The automatic screen changing device for a granulator without stopping the machine as claimed in claim 1, characterized in that: The ejector assembly (7) comprises an ejector (71) and a lifting device (72) for driving the ejector (71) to move up and down, and a first mounting plate (73) is provided between the ejector (71) and the lifting device (72).

6. The automatic screen changing device for a granulator without stopping the machine as claimed in claim 5, characterized in that: Connecting plates (74) are provided on both sides of the No. 1 mounting plate (73), a No. 2 mounting plate (75) is provided at the top of the connecting plate (74), the ejector pin (71) is also provided on the bottom surface of the No. 2 mounting plate (75), and the connecting plate (74) is provided with a guide rail mechanism (76).

7. The automatic screen changing device for a granulator without stopping the machine as claimed in claim 1, characterized in that: There are a plurality of push rods (6), and the plurality of push rods (6) are arranged in a square array.

8. The automatic screen changing device for a granulator without stopping the machine as claimed in claim 1, characterized in that: The first net taking mechanism and the second net taking mechanism both comprise a horizontal moving device (17) and a vertical moving device (18) that cooperate with each other, the first net taking mechanism further comprises an electromagnet (19) arranged on the vertical moving device (18), and the second net taking mechanism further comprises a first clamping plate (20) and a second clamping plate (21) arranged on the vertical moving device (18), and the first clamping plate (20) is equipped with a third power element (22).

9. The automatic screen changing device for a granulator without stopping the machine as claimed in claim 1, characterized in that: A coarse filter is provided at the feed inlet of the filter seat (1).

10. The automatic screen changing device for a granulator without stopping the machine as claimed in claim 9, characterized in that: The coarse filter comprises a barrel (23), a filter barrel (24) is arranged inside the barrel (23), a gap is arranged between the outer wall of the filter barrel (24) and the inner wall of the barrel (23), a screw (25) is arranged inside the filter barrel (24), and the barrel (23) is provided with a feed channel (26) for communicating with the filter barrel (24), a first discharge port (27) for communicating with the filter barrel (24), and a second discharge port (28) for communicating with the feed port of the filter seat (1).

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