Waste plastic reprocessing twin-screw extrusion device convenient for replacing granulation plate

Abstract

The utility model discloses a waste plastic reprocessing twin-screw extrusion device with a granulation plate convenient to replace, which relates to the technical field of waste plastic reprocessing and comprises an extruder barrel fixedly mounted at the top of a base, and a feed hopper is arranged at the top of the extruder barrel. A double-screw extrusion mechanism and an anti-blocking cleaning mechanism are sequentially arranged on the extruder barrel, a granulation plate of a porous structure is arranged on one side of the extruder barrel, four annularly-distributed positioning iron columns are fixed to the side wall of the granulation plate, and four positioning grooves matched with the positioning iron columns are formed in one side of the extruder barrel. And electromagnets are fixed in the four positioning grooves correspondingly, and the four electromagnets are fixedly attracted to the four positioning iron columns correspondingly. According to the utility model, the granulation plates with different apertures can be conveniently replaced according to different processing requirements, so that the replacement efficiency of the granulation plates is improved; and through the arrangement of the anti-blocking cleaning mechanism, the condition that the granulation plate is blocked can be effectively reduced, and the dismounting and cleaning frequency of the granulation plate can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste plastic reprocessing, in particular to a waste plastic reprocessing twin-screw extruder which is convenient for replacing a granulation plate. Background Art

[0002] Recycling and reusing waste plastics is an important way to protect the environment and save resources. Twin-screw extruders are widely used in the reprocessing of waste plastics due to their efficient mixing capacity and good plasticizing effect.

[0003] During the use of traditional twin-screw extruders, the granulation plates installed on them are not easy to replace. It is impossible to replace granulation plates with different apertures according to different processing requirements. In addition, the surface of the granulation plates is prone to clogging and requires frequent disassembly and cleaning. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a waste plastic reprocessing twin-screw extruder which is convenient for replacing granulation plates.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A twin-screw extruder for recycling waste plastics with an easy-to-replace granulation plate comprises an extruder barrel fixedly mounted on the top of a machine base, a feed hopper provided on the top of the extruder barrel, a twin-screw extrusion mechanism and an anti-blocking cleaning mechanism provided on the extruder barrel in sequence, and a granulation plate with a porous structure provided on one side of the extruder barrel;

[0007] Four annularly distributed positioning iron pillars are fixed to the side wall of the granulation plate, and four positioning grooves adapted to the positioning iron pillars are opened on one side of the extruder barrel. Electromagnets are fixed in the four positioning grooves, and the four electromagnets are fixedly attracted to the four positioning iron pillars respectively.

[0008] Preferably, a locking assembly is provided on one side of the granulation plate, and the locking assembly includes a slide groove opened on one side of the machine base, a bidirectional screw rotatably installed in the slide groove, two adjusting rods symmetrically threaded on the two opposite threaded ends of the bidirectional screw, and two arc-shaped locking claws symmetrically welded to the outer walls of the top ends of the two adjusting rods.

[0009] Preferably, one end of the bidirectional screw is fixedly connected to a handwheel, and the outer walls of the two adjusting rods are slidably connected to the inner wall of the sliding groove.

[0010] Preferably, the twin-screw extrusion mechanism includes two extrusion screws rotatably installed in the extruder barrel, two No. 1 gears fixedly sleeved on one end of the two extrusion screws in sequence, a drive motor fixedly installed on the top outer wall of the machine base, and a No. 2 gear fixedly sleeved on the output shaft of the drive motor.

[0011] Preferably, the second gear is located between the two first gears, and the two first gears are meshed with the second gear.

[0012] Preferably, the anti-blocking cleaning mechanism includes a No. 3 gear fixedly mounted on the other end of one of the extrusion screws, a support fixedly connected to the extruder barrel, a transmission shaft rotatably mounted on the support, and a cleaning brush and a No. 4 gear fixedly connected to the transmission shaft in turn.

[0013] Preferably, the third gear and the fourth gear are meshed with each other, and the bristle portion of the cleaning brush is in contact with the surface of the granulation plate.

[0014] The beneficial effects of the utility model are:

[0015] 1. When the granulation plates with different apertures need to be replaced, the hand wheel is used to control the bidirectional screw to rotate in the opposite direction. Then, under the limit of the slide slot, the two adjusting rods threadedly connected to the bidirectional screw will drive the two arc-shaped locking claws to move away from each other. Then, the four electromagnets are turned off and powered to make them lose their magnetism. At this time, the granulation plates can be quickly disassembled. This makes it easy to replace granulation plates with different apertures according to different processing requirements, thereby improving the replacement efficiency of the granulation plates.

[0016] 2. When the utility model is used, the rotation of the extrusion screw will drive the No. 3 gear to rotate, and then the No. 4 gear meshing with the No. 3 gear will drive the transmission shaft to rotate, and then the cleaning brush on the transmission shaft can automatically rotate to effectively clean the surface of the granulation plate, thereby effectively reducing the blockage of the granulation plate and helping to reduce the frequency of disassembly and cleaning of the granulation plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall front-view three-dimensional structure of the utility model;

[0018] Figure 2 This is a three-dimensional enlarged structural diagram of the connection area between the granulation plate and the extruder barrel in the utility model;

[0019] Figure 3 This is a side structural diagram of the extruder barrel in the utility model;

[0020] Figure 4 This is a three-dimensional enlarged structural diagram of the granulation plate and the locking assembly in the utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional three-dimensional structure of the extruder barrel in the utility model;

[0022] Figure 6 For this utility model Figure 5 Schematic diagram of the three-dimensional enlarged structure of part A;

[0023] Figure 7 It is a three-dimensional enlarged structural diagram of the anti-blocking and cleaning mechanism in the utility model.

[0024] In the figure: 1. Machine base; 2. Extruder barrel; 3. Granulating plate; 4. Positioning iron column; 5. Electromagnet; 6. Slide; 7. Bidirectional screw; 8. Adjusting rod; 9. Arc locking claw; 10. Handwheel; 11. Extrusion screw; 12. Gear No. 1; 13. Drive motor; 14. Gear No. 2; 15. Gear No. 3; 16. Support; 17. Drive shaft; 18. Cleaning brush; 19. Gear No. 4. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Example 1, reference Figure 1-6 , a waste plastic reprocessing twin-screw extruder device that is easy to replace a granulation plate, comprising an extruder barrel 2 fixedly mounted on the top of a machine base 1, and a feed hopper is provided on the top of the extruder barrel 2;

[0027] In this embodiment, a granulation plate 3 with a porous structure is provided on one side of the extruder barrel 2, and four annularly distributed positioning iron posts 4 are fixed to the side wall of the granulation plate 3. Four positioning grooves adapted to the positioning iron posts 4 are opened on one side of the extruder barrel 2. Electromagnets 5 are fixed in the four positioning grooves. The four electromagnets 5 are fixedly attracted to the four positioning iron posts 4 respectively, and the four electromagnets 5 are electrically connected to the same control switch through wires;

[0028] When installing the granulation plate 3: align the four positioning iron posts 4 with the four positioning slots and insert them. After being inserted into place, the four positioning iron posts 4 will be attracted by the four electromagnets 5 in the energized state;

[0029] In this embodiment, a locking assembly is provided on one side of the granulation plate 3, which includes a slide 6 provided on one side of the base 1, a bidirectional screw 7 rotatably mounted in the slide 6, two adjusting rods 8 symmetrically screwed on two opposite threaded ends of the bidirectional screw 7, and two arc-shaped locking claws 9 symmetrically welded to the outer walls of the top ends of the two adjusting rods 8;

[0030] Furthermore, one end of the bidirectional screw 7 is fixedly connected to a handwheel 10, and the outer walls of the two adjusting rods 8 are slidably connected to the inner wall of the chute 6;

[0031] When the locking assembly is locked: the bidirectional screw 7 is controlled to rotate forward by the hand wheel 10, and then under the limit of the slide 6, the two adjusting rods 8 threadedly connected with the bidirectional screw 7 will drive the two arc-shaped locking claws 9 to center and lock the granulating plate 3 after magnetic attraction;

[0032] In this embodiment, a twin-screw extrusion mechanism is provided on the extruder barrel 2, which includes two extrusion screws 11 rotatably mounted in the extruder barrel 2, two first gears 12 fixedly mounted on one end of the two extrusion screws 11, a drive motor 13 fixedly mounted on the top outer wall of the base 1, and a second gear 14 fixedly mounted on the output shaft of the drive motor 13;

[0033] Furthermore, the second gear 14 is located between the two first gears 12 , and both first gears 12 are meshed with the second gear 14 ;

[0034] When the twin-screw extruder mechanism is in use: the second gear 14 is controlled to rotate by the driving motor 13, and then the two first gears 12 engaged with the second gear 14 drive the two extrusion screws 11 to rotate in the same direction to heat and extrude the waste plastic added from the feed hopper into the extruder barrel 2.

[0035] Example 2, reference Figure 1-3 and Figure 7 , This embodiment is optimized on the basis of embodiment 1, specifically: a waste plastic reprocessing twin-screw extruder that is convenient for replacing the granulation plate, and also includes an anti-blocking cleaning mechanism provided on the extruder barrel 2;

[0036] In this embodiment, the anti-blocking cleaning mechanism includes a number three gear 15 fixedly mounted on the other end of one of the extrusion screws 11, a support 16 fixedly connected to the extruder barrel 2, a transmission shaft 17 rotatably mounted on the support 16, and a cleaning brush 18 and a number four gear 19 fixedly connected to the transmission shaft 17 in turn;

[0037] Furthermore, the third gear 15 and the fourth gear 19 are meshed with each other, and the bristle portion of the cleaning brush 18 contacts the surface of the granulation plate 3;

[0038] When the anti-blocking cleaning mechanism is in use: the rotation of the extrusion screw 11 will drive the No. 3 gear 15 to rotate, and then the No. 4 gear 19 engaged with the No. 3 gear 15 will drive the transmission shaft 17 to rotate, and then the cleaning brush 18 on the transmission shaft 17 can automatically rotate to effectively clean the surface of the granulation plate 3, thereby effectively reducing the blockage of the granulation plate 3 and helping to reduce the frequency of disassembly and cleaning of the granulation plate 3.

[0039] In addition, through the cooperation of Example 1 and Example 2, the utility model adopts the dual fixing effect of magnetic attraction and locking assembly, which can increase the stability of the connection between the granulation plate 3 and the extruder barrel 2, ensure stability during high-speed extrusion, and through the meshing transmission of multiple gears, it can realize the linkage of the twin-screw extrusion mechanism and the anti-blocking cleaning mechanism, and only needs to be controlled by one drive motor 13, thereby improving the utilization rate of the drive motor 13.

[0040] Working principle: First, the second gear 14 is controlled to rotate by the driving motor 13. Then, the two first gears 12 meshing with the second gear 14 drive the two extrusion screws 11 to rotate in the same direction, heating and extruding the waste plastics added from the feed hopper into the extruder barrel 2. The heated and extruded waste plastics are discharged after passing through the granulation plate 3.

[0041] Secondly, the rotation of the extrusion screw 11 drives the No. 3 gear 15 to rotate, and then the No. 4 gear 19 meshing with the No. 3 gear 15 drives the transmission shaft 17 to rotate, and then the cleaning brush 18 on the transmission shaft 17 can automatically rotate to effectively clean the surface of the granulation plate 3, thereby effectively reducing the blockage of the granulation plate 3 and helping to reduce the frequency of disassembly and cleaning of the granulation plate 3;

[0042] Finally, when it is necessary to replace the granulation plates 3 with different aperture sizes, the bidirectional screw 7 is controlled to rotate in the opposite direction by the hand wheel 10, and then under the limit of the slide groove 6, the two adjusting rods 8 threadedly connected to the bidirectional screw 7 will drive the two arc-shaped locking claws 9 to move away from each other, and then the four electromagnets 5 are turned off and powered off to make them lose their magnetism. At this time, the granulation plates 3 can be quickly disassembled, which makes it convenient to replace the granulation plates 3 with different apertures according to different processing requirements, thereby improving the replacement efficiency of the granulation plates 3.

[0043] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A twin-screw extruder for waste plastic reprocessing that is convenient for replacing a granulation plate, comprising an extruder barrel (2) fixedly mounted on the top of a machine base (1), a feed hopper being provided on the top of the extruder barrel (2), and characterized in that: The extruder barrel (2) is provided with a twin-screw extrusion mechanism and an anti-blocking cleaning mechanism in sequence, and a granulation plate (3) with a porous structure is provided on one side of the extruder barrel (2); Four annularly distributed positioning iron posts (4) are fixed to the side wall of the granulation plate (3), and four positioning grooves adapted to the positioning iron posts (4) are opened on one side of the extruder barrel (2). Electromagnets (5) are fixed in the four positioning grooves, and the four electromagnets (5) are fixedly attracted to the four positioning iron posts (4) respectively.

2. A twin-screw extruder for waste plastics reprocessing with easy replacement of granulation plates according to claim 1, characterized in that: A locking assembly is provided on one side of the granulation plate (3), and the locking assembly includes a slide groove (6) opened on one side of the machine base (1), a bidirectional screw (7) rotatably installed in the slide groove (6), two adjustment rods (8) symmetrically screwed on two opposite threaded ends of the bidirectional screw (7), and two arc-shaped locking claws (9) symmetrically welded to the outer walls of the top ends of the two adjustment rods (8).

3. A twin-screw extruder for waste plastics reprocessing with easy replacement of granulation plates according to claim 2, characterized in that: One end of the bidirectional screw (7) is fixedly connected to a hand wheel (10), and the outer walls of the two adjusting rods (8) are both slidably connected to the inner wall of the slide groove (6).

4. The twin-screw extruder for waste plastics reprocessing with easy replacement of granulation plates according to claim 1, characterized in that: The twin-screw extrusion mechanism comprises two extrusion screws (11) rotatably mounted in an extruder barrel (2), two first gears (12) fixedly sleeved on one end of the two extrusion screws (11), a driving motor (13) fixedly mounted on the top outer wall of the machine base (1), and a second gear (14) fixedly sleeved on the output shaft of the driving motor (13).

5. The twin-screw extruder for waste plastics reprocessing with easy replacement of granulation plates according to claim 4, characterized in that: The second gear (14) is located between the two first gears (12), and the two first gears (12) are both meshed with the second gear (14).

6. The twin-screw extruder for waste plastics reprocessing with easy replacement of granulation plates according to claim 1, characterized in that: The anti-blocking cleaning mechanism comprises a third gear (15) fixedly mounted on the other end of one of the extrusion screws (11), a support member (16) fixedly connected to the barrel (2) of the extruder, a transmission shaft (17) rotatably mounted on the support member (16), and a cleaning brush (18) and a fourth gear (19) fixedly connected to the transmission shaft (17) in sequence.

7. A twin-screw extruder for waste plastics reprocessing with easy replacement of granulation plates according to claim 6, characterized in that: The third gear (15) and the fourth gear (19) are meshed with each other, and the bristle portion of the cleaning brush (18) is in contact with the surface of the granulation plate (3).

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