Granulator non-stop automatic screen changing device

Abstract

The utility model provides a non-stop automatic screen changing device of a granulator, which solves the problem that a filter screen of the conventional granulator needs to be manually changed. 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 utility model relates to the technical field of punching equipment, in particular to an automatic screen changing device for a granulator without stopping the machine. Background Art

[0002] During polymer extrusion production, the melt undergoes long periods of plasticization and heating, which can produce residue. This residue, combined with impurities and unplasticized particles in the raw materials, can cause flow blockage or product defects once it enters the extrusion die, hindering normal production. Therefore, in plastic extrusion production, a filter is installed between the pelletizer and the die to remove impurities and obtain high-quality products. However, during waste plastic recycling, the high impurity content in the waste plastic can clog the filter during discharge, disrupting normal production and discharging. Therefore, the filter needs to be replaced regularly.

[0003] The existing filter structure of the existing granulator, such as the plastic granulator with replaceable filter disclosed in Chinese Patent Authorization Announcement No. CN202964970U, has two filters installed on the filter seat. The filter seat is connected to a drive device. When the filter needs to be replaced, the drive device drives the filter seat to move, pushing the new filter to the working position and pushing out the old filter. However, when replacing the old filter, the filter needs to be manually replaced. First, the staff needs to remove the blockage, then tear off the filter and replace it with a new one. Due to the high temperature required by the granulator when plasticizing the material, there is a risk of burns when manually cleaning. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the utility model 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 solutions adopted in this utility model are as follows:

[0006] The automatic screen changing device for a granulator without stopping comprises a frame, a filter seat is mounted 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 first power element for driving the filter seat to move forward and backward, and further comprises:

[0007] 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;

[0008] a through hole, disposed in the mounting groove;

[0009] A push rod is arranged in the through hole;

[0010] The ejector pin assembly is arranged below the filter seat and is used to push the ejector pin upward;

[0011] The first net taking mechanism is arranged on one side of the ejector assembly;

[0012] The second net taking mechanism is arranged on the other side of the ejector pin assembly.

[0013] The scraper assembly includes a rotating shaft and a No. 1 scraper installed 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.

[0014] 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 installed with a material baffle for cooperating with the material storage cavity.

[0015] The filter seat is provided with guide grooves for cooperating with both sides of the second scraper.

[0016] The ejector assembly includes an ejector and a lifting device for driving the ejector to move up and down, and a first mounting plate is provided between the ejector and the lifting device.

[0017] Connecting plates are provided on both sides of the No. 1 mounting plate, a No. 2 mounting plate is provided on the top of the connecting plate, the ejector pin is also provided on the bottom surface of the No. 2 mounting plate, and the connecting plate is equipped with a guide rail mechanism.

[0018] There are multiple push rods, and the multiple push rods are arranged in a square array.

[0019] 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.

[0020] A coarse filter is provided at the feed inlet of the filter seat.

[0021] The coarse filter includes a barrel, a filter cartridge is arranged inside 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 inside 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.

[0022] The beneficial effects of the utility model are:

[0023] 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 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 screen removal mechanism removes the old filter screen, and the No. 1 screen removal mechanism places the new filter screen in the installation slot. Finally, the filter seat is reset, thereby realizing automatic screen replacement, which not only saves the company's production costs, but also improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the present utility model.

[0025] Figure 2 It is a schematic diagram of the filter seat of the utility model.

[0026] Figure 3 It is a schematic diagram of the first embodiment of the scraper assembly of the present invention.

[0027] Figure 4 It is a schematic diagram of the second embodiment of the scraper assembly of the present invention.

[0028] Figure 5 It is a schematic diagram of the second embodiment of the scraper assembly of the present invention.

[0029] Figure 6 It is a schematic diagram of the ejector assembly of the utility model.

[0030] Figure 7 It is a schematic diagram of the first net taking mechanism and the second net taking mechanism of the utility model.

[0031] Figure 8 It is a cross-sectional schematic diagram of the coarse filter of the utility model.

[0032] Filter seat 1, filter screen seat 2, mounting groove 3, No. 1 power element 4, through hole 5, ejector rod 6, ejector pin assembly 7, rotating shaft 8, No. 1 scraper 9, feed port 10, discharge hole 11, No. 2 scraper 12, No. 2 power element 13, storage chamber 14, baffle plate 15, guide groove 16, ejector pin 71, lifting device 72, No. 1 mounting plate 73, connecting plate 74, No. 2 mounting plate 75, guide rail mechanism 76, horizontal moving device 17, vertical moving device 18, electromagnet 19, No. 1 splint 20, No. 2 splint 21, No. 3 power element 22, barrel 23, filter cartridge 24, screw 25, feed channel 26, No. 1 discharge port 27, No. 2 discharge port 28. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0034] 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 includes a frame, a filter seat 1 is installed on the frame, at least two filter seats 2 are provided 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 back and forth, and further includes:

[0035] 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;

[0036] A through hole 5 is provided in the mounting groove 3;

[0037] A push rod 6 is arranged in the through hole 5;

[0038] The ejector assembly 7 is arranged below the filter seat 2 and is used to push the ejector rod 6 upward;

[0039] The first net taking mechanism is arranged on one side of the ejector assembly 7;

[0040] The second net taking mechanism is arranged on the other side of the ejector assembly 7.

[0041] 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. 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. The ejector rod 6 pushes the filter screen away from the installation slot 3, and the No. 2 net removal mechanism removes the old filter screen, and the No. 1 net removal mechanism places the new filter screen in the installation slot 3. Finally, the filter seat 2 is reset; thereby realizing automatic screen replacement, which not only saves the company's production costs, but also improves work efficiency.

[0042] In the first embodiment, Figure 3 As shown, the scraper assembly includes a rotating shaft 8 and a first 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 seat 2 is moved outward, the rotating shaft 8 is driven by the motor to rotate, allowing the first scraper 9 to contact the filter screen. The first scraper 9 scrapes away the blocked material, which enters the discharge hole 11 through the feed port 10 and is then discharged.

[0043] In the second embodiment, Figure 4 、 Figure 5As 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 chamber 14 for communicating with the rear end of the mounting slot 3. The frame is installed with a baffle plate 15 for cooperating with the storage chamber 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 chamber 14. When the filter is replaced, the filter seat 2 is reset. Since the baffle plate 15 does not move, the material in the storage chamber 14 will be pushed onto the new filter for re-filtration, so that there is no waste of molten material.

[0044] In the second embodiment, Figure 4 As shown, the filter 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.

[0045] 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. A first mounting plate 73 is provided between the ejector 71 and the lifting device 72. The lifting device 72 is a screw lifter for driving the ejector 71 to extend into the through hole 5 and eject the ejector rod 6, thereby allowing the filter to be separated from the mounting slot 3.

[0046] Connecting plates 74 are provided on either side of the first mounting plate 73. A second mounting plate 75 is located at the top of the connecting plates 74. The ejector pin 71 is also located on the bottom of the second mounting plate 75. The connecting plates 74 are equipped with a guide rail mechanism 76. The guide rail mechanism 76 ensures the straightness of the ejector pin 71 during its ascent and descent. Once a new filter is placed in the mounting slot 3, the second mounting plate 75 descends, fully resetting the ejector pin 6 and ensuring a smooth and even installation of the new filter.

[0047] 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 to facilitate the grabbing of the second net-taking mechanism.

[0048] In the embodiment, Figure 1 、 Figure 7As shown, the No. 1 and No. 2 net removal mechanisms each include a horizontal moving device 17 and a vertical moving device 18 that cooperate with each other. The No. 1 net removal mechanism also includes an electromagnet 19 disposed on the vertical moving device 18. The No. 2 net removal mechanism also includes a No. 1 clamping plate 20 and a No. 2 clamping plate 21 disposed on the vertical moving device 18. 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, which achieves horizontal and vertical movement by rotating the gears driven by a motor. The electromagnet 19 is used to absorb the stacked new filter screens, and the No. 3 power element 22 is a cylinder that drives the No. 1 clamping plate 20 and the No. 2 clamping plate 21 to cooperate and clamp the old filter screen on the filter screen holder 2.

[0049] In the embodiment, Figure 4 As shown, a coarse filter is provided at the feed inlet of the filter seat 1. The molten material is coarsely filtered to reduce the number of filter screen replacements.

[0050] In the embodiment, Figure 8 As shown, the coarse filter includes a barrel 23, a filter cartridge 24 is provided in the barrel 23, a gap is provided between the outer wall of the filter cartridge 24 and the inner wall of the barrel 23, a screw 25 is provided in the filter cartridge 24, and the barrel 23 is provided with a feed channel 26 for communicating with the filter cartridge 24, a No. 1 discharge port 27 for communicating with the filter cartridge 24, and a No. 2 discharge port 28 for communicating with the feed port of the filter seat 1. The melt enters the filter cartridge 24, then flows out from the circumference of the filter cartridge 24, enters the filter seat 1 through the No. 2 discharge port 28, and some large particles of impurities remain in the filter cartridge 24 and are discharged from the No. 1 discharge port 27 through the screw 25, achieving coarse filtration of the melt, and then reaches the filter screen in the filter screen seat 2 for high-mesh filtration.

[0051] Obviously, the above embodiments of the present invention are merely examples for the purpose of illustrating the present invention and are not intended to limit the implementation methods of the present invention. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to provide an exhaustive list of implementation methods. However, any obvious variations or modifications arising from the essence of the present invention remain within the scope of protection of the present invention.

Claims

1. An automatic screen changing device for a granulator without stopping the machine, comprising a frame, a filter seat (1) installed on the frame, at least two filter seats (2) arranged in the filter seat (1), the filter seat (2) having a mounting groove (3) for placing the filter, and 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 provided in the mounting groove (3); A push rod (6) is arranged in the through hole (5); A ejector pin assembly (7) is provided below the filter seat (2) and is used to push the ejector pin (6) upward; A No. 1 net taking mechanism is provided on one side of the ejector pin 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 No. 1 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 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 material storage cavity (14) for communicating with the rear end of the mounting groove (3). The frame is provided with a material baffle (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 both 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 equipped 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 multiple push rods (6), and the multiple 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 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). 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). The No. 1 clamping plate (20) is equipped with a No. 3 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 provided in the barrel (23), a gap is provided between the outer wall of the filter barrel (24) and the inner wall of the barrel (23), a screw (25) is provided 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).

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