A waste plastic reprocessing double screw extrusion device facilitating replacement of a prilling plate

Abstract

The utility model relates to double screw extrusion device technical field provides a kind of waste plastics reprocessing double screw extrusion device of granulating plate convenient to replace, it includes: base and double screw extruder barrel, the double screw extruder barrel is fixedly arranged on the outer surface of base, further include: replacement subassembly, set up in the outer surface of one side of the double screw extruder barrel, the replacement subassembly includes: mounting plate, fixedly arranged in the double screw extruder barrel near the one side of discharge port, the one side of the mounting plate is fixedly provided with stepper motor;Multiple connecting rods are all fixedly arranged in the output end of the stepper motor;Opening stepper motor rotates granulating plate body by multiple connecting rods, and the aperture granulating plate body circumference that needs is rotated to the discharge port of double screw extruder barrel, makes granulating plate body and discharge port conform, then two electric push rods are synchronously controlled by PLC controller, drive annular sleeve to move to the junction of granulating plate body and discharge port.

Description

Technical Field

[0001] This utility model relates to the technical field of twin-screw extrusion devices, and in particular to a twin-screw extrusion device for reprocessing waste plastics that facilitates the replacement of the granulation plate. Background Technology

[0002] Twin-screw extruders for waste plastic reprocessing are core equipment in the field of plastic recycling. They are mainly used to melt, mix, devolatilize, filter and homogenize waste plastics (such as PE, PP, PET, ABS, etc.) after crushing, washing and drying, and finally granulate them through a die to produce reusable recycled plastic granules. Different granulation plates with different pore sizes need to be replaced during the processing.

[0003] In the prior art, such as Chinese Patent No. CN223223817U, a twin-screw extruder for waste plastic reprocessing with easy replacement of granulation plates, relating to the field of waste plastic reprocessing technology, it includes an extruder barrel fixedly installed on the top of a machine base. A feed hopper is provided at the top of the extruder barrel. A twin-screw extrusion mechanism and an anti-clogging cleaning mechanism are sequentially arranged on the extruder barrel. A porous granulation plate is provided on one side of the extruder barrel. Four annularly distributed positioning iron posts are fixed to the side wall of the granulation plate, and four positioning grooves adapted to the positioning iron posts are opened on one side of the extruder barrel. Electromagnets are fixed in each of the four positioning grooves, and the four electromagnets are respectively fixedly attracted to the four positioning iron posts. This utility model facilitates the replacement of granulation plates with different apertures according to different processing requirements, improving the replacement efficiency of the granulation plate. The anti-clogging cleaning mechanism effectively reduces granulation plate clogging, helping to reduce the frequency of granulation plate disassembly and cleaning.

[0004] While the above-mentioned solutions have the advantages mentioned above, they also have disadvantages: manual replacement of the granulation plate is inefficient. The granulation plate is clamped by rotating the bidirectional screw with a handwheel, which drives the arc-shaped locking claw. However, there is no self-locking mechanism. When the waste plastic reprocessing twin-screw extruder is working, it will vibrate, causing the arc-shaped locking claw to loosen, reducing the clamping effect on the granulation plate, causing it to loosen or even fall off, thus reducing work efficiency. In addition, the granulation plate is connected to the extruder barrel through the positioning iron column. Due to the tight fit, it is not easy to remove during replacement, thus reducing the efficiency of replacing the granulation plate. Utility Model Content

[0005] The purpose of this invention is to address the low efficiency of manual replacement of granulation plates in existing technologies. While a handwheel rotates a bidirectional screw to clamp the granulation plate using arc-shaped locking claws, a self-locking mechanism is lacking. Vibration during operation of the twin-screw extruder for waste plastic reprocessing causes the arc-shaped locking claws to loosen, reducing the clamping effect on the granulation plate and potentially causing it to loosen or even fall off, thus lowering work efficiency. Furthermore, the granulation plate is connected to the extruder barrel via positioning iron pillars, and the tight fit makes removal difficult, further reducing the efficiency of granulation plate replacement.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a twin-screw extrusion device for reprocessing waste plastics that facilitates the replacement of granulation plates, comprising: a base and a twin-screw extruder barrel, wherein the twin-screw extruder barrel is fixedly disposed on the outer surface of the base, and further comprising: A replacement component is disposed on one outer surface of the twin-screw extruder barrel, and the replacement component includes: A mounting plate is fixedly installed on the side of the twin-screw extruder barrel near the discharge port, and a stepper motor is fixedly installed on one side of the mounting plate; Multiple connecting rods are fixedly installed at the output end of the stepper motor, and a granulation plate body is fixedly installed at one end of each connecting rod; Among them, multiple connecting rods are circumferentially distributed at the output end of the stepper motor, and the granulation plate body is in close contact with the discharge port of the twin-screw extruder barrel; A stabilizing component is disposed on one side of the mounting plate.

[0007] Preferably, the replacement component further includes: A limiting ring is fixedly disposed on one outer surface of the granulation plate body; A fixing block is fixedly disposed on the outer surface of the twin-screw extruder barrel; Two electric push rods are fixedly mounted on one side of the fixed block and the base, respectively, and a connecting block is fixedly mounted on the output end of the electric push rod; Among them, the two electric push rods are symmetrical; An annular sleeve is fixedly disposed on the opposite surfaces of the two connecting blocks, and a through slot is provided on the side of the annular sleeve near the stepper motor; The annular sleeve is movably fitted onto the outer surface of the twin-screw extruder barrel.

[0008] The technical effect of adopting the above-mentioned further solution is as follows: the stepper motor drives the granulation plate body to rotate through multiple connecting rods, and rotates the granulation plate body of the required aperture to the discharge port of the twin-screw extruder barrel, so that the granulation plate body fits with the discharge port. Then, the PLC controller synchronously controls two electric push rods to drive the annular sleeve to move to the connection point between the granulation plate body and the discharge port.

[0009] Preferably, the stabilizing component includes: Multiple stabilizer bars are fixedly installed on one side of the mounting plate, and a semi-circular plate is fixedly installed on the other side of the stabilizer bars; A semi-annular groove is formed on the inner surface of the semi-annular plate; The limiting ring is movably set inside the semi-annular groove, and the semi-annular plate is concentric with the stepper motor.

[0010] The technical effect of adopting the above-mentioned further solution is that when the stepper motor drives multiple granulation plate bodies to rotate, the limiting ring installed on the outer surface of the granulation plate body will be embedded in the interior of the semi-annular groove and slide in a circle inside it. The semi-annular plate can improve the stability of the granulation plate body when rotating, so that it can better fit with the discharge port.

[0011] Preferably, a first annular magnet is fixedly provided on one side of the granulation plate body.

[0012] The technical effect of adopting the above-mentioned further solution is that when the material is pushed out, it generates a perpendicular force with the first and second annular magnets. Therefore, there is a maximum normal attraction between the adsorption surfaces of the first and second annular magnets, making it less likely for the granulation plate body to fall off the discharge port.

[0013] Preferably, a second annular magnet is fixedly provided on one side of the barrel of the twin-screw extruder.

[0014] The technical effect of adopting the above-mentioned further solution is that the second ring magnet attracts the first ring magnet, which can improve the stability and connection effect of the granulation plate body.

[0015] Preferably, a plurality of pressure sensors are fixedly provided on one side of the annular sleeve.

[0016] The technical effect of adopting the above-mentioned further solution is that when the pressure sensor comes into contact with the limiting ring on one side of the granulation plate body, it can be triggered. At this time, the electric push rod stops pushing the annular sleeve, and the annular sleeve is just fitted at the connection between the granulation plate body and the twin-screw extruder barrel.

[0017] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the stepper motor drives the granulation plate body to rotate through multiple connecting rods, rotating the granulation plate body of the required aperture to the discharge port of the twin-screw extruder barrel, so that the granulation plate body fits into the discharge port. Then, the PLC controller synchronously controls two electric push rods to move the annular sleeve to the connection point between the granulation plate body and the discharge port, limiting the granulation plate body and making it more stable at the discharge port, so as not to shake.

[0018] 2. In this utility model, when the stepper motor drives multiple granulation plate bodies to rotate, the limiting ring installed on the outer surface of the granulation plate body will be embedded in the interior of the semi-annular groove and slide circumferentially inside it. The semi-annular plate can improve the stability of the granulation plate body during rotation, making it better fit with the discharge port. When the suitable granulation plate body fits with the discharge port, the first annular magnet and the second annular magnet attract each other, making the granulation plate body more stably installed on one side of the twin-screw extruder barrel. Attached Figure Description

[0019] Figure 1 This utility model presents a structural schematic diagram of a twin-screw extruder for reprocessing waste plastics that facilitates the replacement of the granulation plate. Figure 2 A side view of the twin-screw extruder for reprocessing waste plastics, which facilitates the replacement of the granulation plate, is provided for this utility model. Figure 3 This utility model provides an exploded structural diagram of a twin-screw extruder for reprocessing waste plastics that facilitates the replacement of the granulation plate. Figure 4 This invention presents a partial cross-sectional view of a twin-screw extruder for reprocessing waste plastics, which facilitates the replacement of the granulation plate.

[0020] Legend: 1. Base; 101. Twin-screw extruder barrel; 102. Fixing block; 103. Electric push rod; 104. Annular sleeve; 105. Connecting block; 106. Granulating plate body; 107. Semi-annular plate; 108. Stepper motor; 109. Connecting rod; 110. Stabilizing rod; 111. Semi-annular groove; 112. Mounting plate; 113. Limiting ring; 114. First annular magnet; 115. Second annular magnet; 116. Through groove; 117. Pressure sensor. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1, as Figure 1-4As shown, this utility model provides a twin-screw extruder for reprocessing waste plastics that facilitates the replacement of the granulation plate, including: a base 1, a twin-screw extruder barrel 101, a replacement component, and a stabilizing component; The replacement components include: a mounting plate 112 is fixedly installed on one side of the outer surface of the twin-screw extruder barrel 101; a stepper motor 108 is fixedly installed on one side of the mounting plate 112; multiple connecting rods 109 are fixedly installed at the output end of the stepper motor 108; and a granulation plate body 106 is fixedly installed on one side of the connecting rods 109. Multiple connecting rods 109 are circumferentially distributed at the output end of the stepper motor 108. The multiple granulation plate bodies 106 have different apertures. When it is necessary to replace the granulation plate body 106 with a different aperture, the stepper motor 108 is turned on to drive the granulation plate body 106 to rotate through the multiple connecting rods 109, so that the suitable granulation plate body 106 fits with the discharge port of the twin-screw extruder barrel 101. The stepper motor 108 has the advantage of precise positioning, which can make the granulation plate body 106 fit more precisely with the discharge port. A fixing block 102 is fixedly installed on the outer surface of the barrel 101 of the twin-screw extruder. An electric push rod 103 is fixedly installed on one side of both the fixing block 102 and the base 1. A connecting block 105 is fixedly installed at the output end of the electric push rod 103. An annular sleeve 104 is fixedly installed on the opposite side of the two connecting blocks 105. In addition, the annular sleeve 104 is movably sleeved on the outer surface of the twin-screw extruder barrel 101. The annular sleeve 104 has a through groove 116 on the side near the stepper motor 108. The PLC can synchronously control the two electric push rods 103 to start at the same time. The two electric push rods 103 drive the annular sleeve 104 to be clamped at the joint between the discharge port and the granulation plate body 106 through the connecting block 105. This can position the granulation plate body 106 to prevent shaking and provide a connection between the granulation plate body 106 and the twin-screw extruder barrel 101. The connecting rod 109 is embedded in the through groove 116. It should be noted that multiple pressure sensors 117 are fixedly installed on one side of the annular sleeve 104. When the pressure sensor 117 comes into contact with the limiting ring 113 on one side of the granulation plate body 106, it will be triggered. At this time, the electric push rod 103 will stop pushing the annular sleeve 104, and the annular sleeve 104 will fit exactly at the connection between the granulation plate body 106 and the twin-screw extruder barrel 101.

[0024] In this embodiment, the limiting ring 113 is fixedly installed on one side of the granulation plate body 106. The limiting ring 113 can act as a barrier to the annular sleeve 104, preventing the annular sleeve 104 from moving too much and failing to limit the granulation plate body 106.

[0025] Example 2, as Figure 1-4As shown, the stabilizing assembly includes: a plurality of stabilizing rods 110 fixedly installed on one side of the mounting plate 112, and a semi-annular plate 107 fixedly installed on the other side of the stabilizing rods 110, with a semi-annular groove 111 formed on the inner surface of the semi-annular plate 107. The limiting ring 113 is movably embedded inside the semi-annular groove 111. When the stepper motor 108 drives multiple granulation plate bodies 106 to rotate, the limiting ring 113 will be embedded inside the semi-annular groove 111, which can improve the stability of the granulation plate body 106 when rotating, so that it will not shake and better fit with the discharge port.

[0026] In this embodiment, a first annular magnet 114 is fixedly installed on one side of the granulation plate body 106, and a second annular magnet 115 is fixedly installed on one side of the twin-screw extruder barrel 101. The first annular magnet 114 and the second annular magnet 115 attract each other, which can improve the connection effect between the granulation plate body 106 and the twin-screw extruder barrel 101. When the material is extruded through the granulation plate body 106, the granulation plate body 106 will not fall off from the discharge port. When the material is pushed out, it generates a perpendicular force with the first annular magnet 114 and the second annular magnet 115. Therefore, there is a maximum normal attraction force, i.e., a "pull-off force", between the attraction surfaces of the first annular magnet 114 and the second annular magnet 115, which makes it difficult for the granulation plate body 106 to fall off from the discharge port. When replacing, the granulation plate body 106 rotates and slides out from the discharge port, so it is relatively convenient to replace.

[0027] Working principle: When the stepper motor 108 is turned on, it drives the granulation plate body 106 to rotate through multiple connecting rods 109. The granulation plate body 106 with the required aperture is rotated circumferentially to the discharge port of the twin-screw extruder barrel 101, so that the granulation plate body 106 fits with the discharge port. Then, the PLC controller synchronously controls two electric push rods 103 to drive the annular sleeve 104 to move to the connection point between the granulation plate body 106 and the discharge port, limiting the granulation plate body 106 and making it more stable at the discharge port, so that it is not easy to shake. When the stepper motor 108 drives multiple granulation plate bodies 106 to rotate, the limiting ring 113 installed on the outer surface of the granulation plate body 106 will be embedded in the interior of the semi-annular groove 111 and slide circumferentially inside it. The semi-annular plate 107 can improve the stability of the granulation plate body 106 during rotation, making it better fit with the discharge port. When the appropriate granulation plate body 106 fits with the discharge port, the first annular magnet 114 and the second annular magnet 115 attract each other, making the granulation plate body 106 more stably installed on one side of the twin-screw extruder barrel 101.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A twin-screw extruder for reprocessing waste plastics that facilitates the replacement of the pelletizing plate, comprising: The base (1) and the twin-screw extruder barrel (101), wherein the twin-screw extruder barrel (101) is fixedly disposed on the outer surface of the base (1), characterized in that it further comprises: A replacement component is disposed on one outer surface of the twin-screw extruder barrel (101), the replacement component comprising: Mounting plate (112) is fixedly installed on the side of the twin-screw extruder barrel (101) near the discharge port, and a stepper motor (108) is fixedly installed on one side of the mounting plate (112). Multiple connecting rods (109) are fixedly installed at the output end of the stepper motor (108), and a granulation plate body (106) is fixedly installed at one end of the connecting rod (109). Among them, multiple connecting rods (109) are circumferentially distributed at the output end of the stepper motor (108), and the granulation plate body (106) is in contact with the discharge port of the twin-screw extruder barrel (101); A stabilizing component is disposed on one side of the mounting plate (112).

2. The twin-screw extruder for reprocessing waste plastics according to claim 1, characterized in that: The replacement component also includes: A limiting ring (113) is fixedly disposed on one outer surface of the granulation plate body (106); A fixing block (102) is fixedly disposed on the outer surface of the barrel (101) of the twin-screw extruder; Two electric push rods (103) are fixedly installed on one side of the fixing block (102) and the base (1), respectively, and a connecting block (105) is fixedly installed at the output end of the electric push rod (103). Among them, the two electric push rods (103) are symmetrical; An annular sleeve (104) is fixedly disposed on the opposite surfaces of the two connecting blocks (105), and a through groove (116) is provided on the side of the annular sleeve (104) near the stepper motor (108). Among them, the annular sleeve (104) is movably sleeved on the outer surface of the twin-screw extruder barrel (101).

3. The twin-screw extruder for reprocessing waste plastics according to claim 1, characterized in that: The stabilizing component includes: Multiple stabilizer bars (110) are fixedly installed on one side of the mounting plate (112), and a semi-circular plate (107) is fixedly installed on the other side of the stabilizer bars (110). A semi-annular groove (111) is formed on the inner surface of the semi-annular plate (107); The limiting ring (113) is movably set inside the semi-annular groove (111), and the semi-annular plate (107) is concentric with the stepper motor (108).

4. The twin-screw extruder for reprocessing waste plastics according to claim 1, characterized in that: A first annular magnet (114) is fixedly provided on one side of the granulation plate body (106).

5. The twin-screw extruder for reprocessing waste plastics according to claim 1, characterized in that: A second annular magnet (115) is fixedly installed on one side of the barrel (101) of the twin-screw extruder.

6. The twin-screw extruder for reprocessing waste plastics according to claim 2, characterized in that: Multiple pressure sensors (117) are fixedly installed on one side of the annular sleeve (104).

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