Dismounting and mounting tool for screw rod of plastic extruding machine

Abstract

The utility model relates to the technical field of screw dismounting and mounting, and discloses a plastic extruding machine screw dismounting and mounting tool which comprises a first supporting seat and an arranged driving assembly, a hydraulic rod is mounted on the upper surface of the first supporting seat, and a movable supporting frame is additionally arranged at the telescopic end of the hydraulic rod. A fixed support frame is mounted on the outer side of the movable support frame; and the second supporting seat is connected with a material conveying roller. According to the dismounting and mounting tool for the screw of the plastic extruding machine, the pushed-out screw part is placed on the movable supporting frame, the driving assembly drives the hydraulic rod, the hydraulic rod drives the screw to move to the fixed supporting frame through the movable supporting frame, the screw moves to the second supporting seat along the fixed supporting frame, and the conveying roller drives the screw to move; when the screw rod is installed, the screw rod reversely moves through the hydraulic rod, the movable supporting frame, the fixed supporting frame and the material conveying roller and enters the screw chamber to be installed.

Description

Technical Field

[0001] This utility model relates to the field of screw disassembly and installation technology, specifically a tool for disassembling and installing an extruder screw. Background Technology

[0002] An extruder, also known as a screw extruder, is an important type of plastic machinery primarily used for extruding and molding plastics. The working principle of an extruder is to use a screw of a specific shape rotating within a heated barrel to extrude plastic fed from a hopper, uniformly plasticizing it. The plasticized plastic is then extruded into various shapes through the die head and different shaped molds. The extrusion process involves two stages: plasticization and molding. The plasticization stage occurs within the barrel, where the plastic transforms from solid granules into a plastic melt. The molding stage takes place within the die head, where the melt is molded into products of the desired size and shape. Extruders can be classified according to the number of screws: single-screw extruders, twin-screw extruders, and multi-screw extruders. Single-screw extruders are the most widely used and suitable for extruding general materials. Extruder screws are typically large and heavy, requiring tools for disassembly and installation during maintenance or replacement to ensure safety and accuracy.

[0003] Traditional extruder screw disassembly and installation tools typically involve using a long threaded push rod to push the screw halfway out from its head, securing it with slings, and then pulling it out of the screw bore using a crane. However, this method not only poses certain safety hazards, but also risks damaging the screw and bore if the pulling angle is incorrect, resulting in improper pulling force. Therefore, a new extruder screw disassembly and installation tool is proposed. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the existing technology, this utility model provides a tool for disassembling and installing extruder screws, so as to solve the above-mentioned technical problems that not only make the operation have certain safety hazards, but also damage the screw and screw bore.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a tool for disassembling and installing an extruder screw, comprising:

[0008] The first support base and the drive assembly disposed below the first support base, wherein a hydraulic rod is mounted on the upper surface of the first support base, and a movable support frame is provided at the telescopic end of the hydraulic rod, and a fixed support frame is mounted on the outside of the movable support frame.

[0009] The second support seat is located outside the first support seat, and a feeding roller is rotatably connected to the inner cavity of the second support seat. The screw is slowly pushed out of the extruder body by the thrust of the long threaded push rod until it reaches half its length. The pushed-out screw portion is then placed on the movable support frame. The drive assembly on the first support seat drives the hydraulic rod, which in turn moves the screw through the movable support frame to the fixed support frame. The screw then moves along the fixed support frame to the second support seat. The feeding roller, connected to an external drive device on the second support seat, moves the screw, pulling it out of the screw bore. The feeding roller then moves it out of the production area. When the screw is being installed, it moves in the opposite direction through the hydraulic rod, movable support frame, fixed support frame, and feeding roller to enter the screw bore for installation. This not only makes operation safer and avoids damage to the screw and screw bore, but also makes it easier to disassemble and install the screw from the screw bore.

[0010] Preferably, the drive assembly includes a first drive motor, a hydraulic pump, and hydraulic pipes, with the first drive motor positioned outside the hydraulic pump. The hydraulic rod is driven by the first drive motor, the hydraulic pump, and the hydraulic pipes.

[0011] Preferably, the output shaft of the first drive motor is connected to the input shaft of the hydraulic pump via a coupling, and the oil outlet of the hydraulic pump is connected to the oil inlet of the hydraulic rod via a hydraulic pipeline. The first drive motor drives the hydraulic pump through the coupling, converting the mechanical energy of the first drive motor into the pressure energy of the liquid, causing the hydraulic pump to draw oil from the oil tank and transmit the hydraulic oil into the interior of the hydraulic rod through the hydraulic pipeline.

[0012] Preferably, a fixed seat is installed on both the front and back of the second support base, and an electric push rod is installed on the front of each fixed seat. The electric push rod drives the connecting structure to move on the fixed seat.

[0013] Preferably, the telescopic end of the electric push rod extends inward through the outer walls of the fixed base and the second support base, and is connected to a connecting seat. The electric push rod can drive the connecting seat to move on the fixed base.

[0014] Preferably, a second drive motor is mounted on the upper surface of the connecting seat, and a feeding block is rotatably connected to the lower surface of the connecting seat, with the second drive motor and the feeding block coaxially connected. The electric push rod on the fixed seat can drive the connecting seat to move, causing the feeding block to fit tightly against the surface of the extruder screw. The second drive motor on the connecting seat drives the feeding block to rotate and adjusts its direction of rotation. This not only limits the movement of the extruder screw on the feeding roller but also facilitates the movement of the extruder screw and prevents misalignment of the extruder screw during movement.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a tool for disassembling and installing an extruder screw, which has the following advantages:

[0017] This extruder screw disassembly and installation tool uses the thrust of a long threaded pusher to slowly push the screw out of the extruder body until it reaches half its length. The pushed-out screw portion is then placed on a movable support frame. A drive assembly on a first support seat drives a hydraulic rod, which in turn moves the screw through the movable support frame to a fixed support frame. The screw then moves along the fixed support frame to a second support seat. A feed roller connected to an external drive device on the second support seat moves the screw, pulling it out of the screw bore. The feed roller then moves the screw out of the production area. During installation, the screw moves in the opposite direction via the hydraulic rod, movable support frame, fixed support frame, and feed roller, entering the screw bore for installation. This not only makes operation safer but also avoids damage to the screw and screw bore, while allowing for easier disassembly and installation of the screw from the screw bore. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the drive component of this utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure of the second support base of this utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure of the connector of this utility model.

[0022] In the figure: 1. First support seat; 2. Drive assembly; 3. Hydraulic rod; 4. Movable support frame; 5. Fixed support frame; 6. Second support seat; 7. Feeding roller; 8. Fixed seat; 9. First drive motor; 10. Hydraulic pump; 11. Hydraulic pipeline; 12. Electric push rod; 13. Connecting seat; 14. Second drive motor; 15. Feeding block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides a technical solution: a tool for disassembling and installing an extruder screw, comprising: (see details) Figure 1 , Figure 3 The first support base 1 and the drive assembly 2 disposed below the first support base 1, and a hydraulic rod 3 is installed on the upper surface of the first support base 1, and a movable support frame 4 is added to the telescopic end of the hydraulic rod 3, and a fixed support frame 5 is installed on the outside of the movable support frame 4.

[0025] The second support 6 is located outside the first support 1, and the inner cavity of the second support 6 is rotatably connected to the feeding roller 7. The screw is slowly pushed out of the extruder body by the thrust of the long threaded push rod until it reaches half the length of the extruder screw. The pushed-out screw part is then placed on the movable support frame 4. The drive assembly 2 drives the hydraulic rod 3 on the first support seat 1. The hydraulic rod 3 drives the screw to move to the fixed support frame 5 through the movable support frame 4. The screw moves along the fixed support frame 5 to the second support seat 6. The feed roller 7 is externally connected to the drive device on the second support seat 6. The feed roller 7 drives the screw to move on the second support seat 6, so that the extruder screw is pulled out of the screw cavity and then moved out of the production area by the feed roller 7. When the screw is installed, the screw moves in the opposite direction through the hydraulic rod 3, the movable support frame 4, the fixed support frame 5 and the feed roller 7 and enters the screw cavity for installation. On the one hand, this not only makes the operation safer but also avoids damage to the screw and screw cavity. On the other hand, it makes it easier to disassemble and install the screw from the screw cavity.

[0026] Please see Figure 2 The drive assembly 2 includes a first drive motor 9, a hydraulic pump 10, and hydraulic pipes 11, with the first drive motor 9 located outside the hydraulic pump 10. The hydraulic rod 3 is driven by the first drive motor 9, the hydraulic pump 10, and the hydraulic pipes 11. The output shaft of the first drive motor 9 is connected to the input shaft of the hydraulic pump 10 via a coupling, and the oil outlet of the hydraulic pump 10 is connected to the oil inlet of the hydraulic rod 3 via the hydraulic pipes 11. The first drive motor 9 drives the hydraulic pump 10 through the coupling, converting the mechanical energy of the first drive motor 9 into the pressure energy of the liquid, causing the hydraulic pump 10 to draw oil from the oil tank and transmit the hydraulic oil into the interior of the hydraulic rod 3 through the hydraulic pipes 11.

[0027] Please see Figure 3 , Figure 4The second support base 6 has fixed bases 8 installed on both its front and back sides, and electric push rods 12 are installed on the front of each fixed base 8. The electric push rods 12 move the connecting structure on the fixed bases 8. The telescopic end of the electric push rod 12 extends inward through the outer walls of both the fixed base 8 and the second support base 6, connecting to a connecting base 13. The electric push rod 12 moves the connecting base 13 on the fixed base 8. A second drive motor 14 is installed on the upper surface of the connecting base 13, and a feeding block 15 is rotatably connected to the lower surface of the connecting base 13. The second drive motor 14 and the feeding block 15 are coaxially connected. The electric push rod 12 can drive the connecting seat 13 to move on the fixed seat 8, so that the feeding block 15 is in close contact with the surface of the extruder screw. The second drive motor 14 drives the feeding block 15 to rotate on the connecting seat 13 and adjusts the direction of the feeding block 15. This not only limits the extruder screw on the feeding roller 7, but also facilitates the movement of the extruder screw and avoids misalignment of the extruder screw during movement.

[0028] This solution: The screw is slowly pushed out of the extruder body by the thrust of a long threaded pusher until it reaches half its length. The pushed-out screw portion is then placed on the movable support frame 4. The drive assembly 2, on the first support seat 1, drives the hydraulic rod 3, which in turn moves the screw via the movable support frame 4 to the fixed support frame 5. The screw then moves along the fixed support frame 5 to the second support seat 6. The feed roller 7, connected to an external drive device on the second support seat 6, moves the screw along the second support seat 6, pulling the extruder screw out of the screw bore. The screw is then moved out of the production area by the feed roller 7. During installation, the screw moves in the opposite direction through the hydraulic rod 3, movable support frame 4, fixed support frame 5, and feed roller 7 and enters the screw cavity for installation. The first drive motor 9 drives the hydraulic pump 10 through the coupling, converting the mechanical energy of the first drive motor 9 into the pressure energy of the liquid, so that the hydraulic pump 10 draws oil from the oil tank and transmits the hydraulic oil into the interior of the hydraulic rod 3 through the hydraulic pipeline 11. The electric push rod 12 can drive the connecting seat 13 to move on the fixed seat 8, so that the feed block 15 is in close contact with the surface of the extruder screw. The second drive motor 14 drives the feed block 15 to rotate on the connecting seat 13 and adjusts the direction of the feed block 15.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tool for disassembling and installing an extruder screw, characterized in that, include: The first support base (1) and the drive assembly (2) disposed below the first support base (1) are provided with a hydraulic rod (3) installed on the upper surface of the first support base (1), and a movable support frame (4) is provided at the telescopic end of the hydraulic rod (3), and a fixed support frame (5) is installed on the outside of the movable support frame (4). The second support (6) is located outside the first support (1), and the inner cavity of the second support (6) is rotatably connected to the feeding roller (7).

2. The extruder screw disassembly and installation tool according to claim 1, characterized in that: The drive assembly (2) includes a first drive motor (9), a hydraulic pump (10) and a hydraulic pipeline (11), and the first drive motor (9) is located outside the hydraulic pump (10).

3. The extruder screw disassembly and installation tool according to claim 2, characterized in that: The output shaft of the first drive motor (9) is connected to the input shaft of the hydraulic pump (10) by a coupling, and the oil outlet of the hydraulic pump (10) is connected to the oil inlet of the hydraulic rod (3) through a hydraulic pipe (11).

4. The extruder screw disassembly and installation tool according to claim 1, characterized in that: The second support base (6) is equipped with a fixed base (8) on both the front and back sides, and an electric push rod (12) is installed on the front of the fixed base (8).

5. The extruder screw disassembly and installation tool according to claim 4, characterized in that: The telescopic end of the electric push rod (12) extends inward through the outer wall of the fixed base (8) and the second support base (6) and is connected to the connecting base (13).

6. The extruder screw disassembly and installation tool according to claim 5, characterized in that: The upper surface of the connecting seat (13) is equipped with a second drive motor (14), and a feeding block (15) is rotatably connected to the lower surface of the connecting seat (13), and the second drive motor (14) and the feeding block (15) are coaxially connected.

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