Work fixture for dismounting screw of polyolefin plastic extruder

Abstract

The utility model discloses a frock clamp for dismounting a polyolefin plastic extruder screw, which relates to the technical field of frock clamps and comprises a frock sleeve, the frock sleeve is a circular through pipe with two open ends, one end of the frock sleeve is fixedly connected with a hoisting base, the hoisting base is connected with a hoisting ring, and the hoisting ring is connected with a hoisting rod. A plurality of adjusting screw rods are in threaded connection with the outer side wall of the end, away from the hoisting base, of the tool sleeve, the adjusting screw rods penetrate through the side wall of the tool sleeve and are distributed in an annular array, and adjusting caps are fixedly connected to the ends, located on the outer side of the tool sleeve, of the adjusting screw rods; due to the design of the tool clamp, the screw of the plastic extruder can be disassembled more quickly and conveniently, a large amount of manpower and time are not needed any more, the production efficiency is greatly improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, in particular to a tooling fixture used for disassembling a screw rod of a polyolefin plastic extruder. Background Art

[0002] Plastics processing equipment is a crucial component in mechanical engineering, with plastic extruders being a common type of equipment, primarily used to extrude plastic raw materials into desired products. The core component of a plastic extruder is the screw, which mixes, pressurizes, and extrudes the plastic, directly impacting the extruder's performance and the quality of the finished product. Therefore, screw manufacturing and maintenance are key areas of research in the field of plastics processing equipment. In the field of fixture design, fixtures are devices used to secure workpieces and maintain their correct position and orientation during processing. Fixture design directly impacts machining accuracy and efficiency, making it particularly important in machining and assembly processes. Conventional single-screw replacement typically involves disassembling the barrel and mold connection, disconnecting the screw from the gearbox, and then connecting a rotating screw to the tail of the screw. This is then gradually rotated to propel the screw forward from the barrel outlet. Due to screw length limitations, this process requires repeated adjustments and the use of a longer force transmission tool to achieve forward movement. This method is cumbersome, time-consuming, labor-intensive, and inefficient. For example, disassembly of a 120*33 single screw takes more than two hours, and is prone to damage and deformation of the barrel, affecting the screw's reusability and extruder performance, reducing production efficiency. Therefore, existing technologies in this field have significant problems and shortcomings, requiring further improvement. Utility Model Content

[0003] The purpose of the utility model is to provide a fixture for disassembling the screw of a polyolefin plastic extruder, so as to solve the technical problem that the existing extruder screw disassembly easily damages the barrel and deforms it, affects the reuse of the screw and the performance of the extruder, and reduces production efficiency.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A tooling fixture for disassembling the screw of a polyolefin plastic extruder includes a tooling sleeve, which is a circular through tube with openings at both ends. One end of the tooling sleeve is fixedly connected to a lifting base, and a lifting ring is connected to the lifting base. The outer wall of the tooling sleeve at one end away from the lifting base is threadedly connected to multiple adjustment screws, and the adjustment screws pass through the side wall of the tooling sleeve. The multiple adjustment screws are distributed in a ring array, and the end of the adjustment screw located on the outside of the tooling sleeve is fixedly connected to an adjustment cap.

[0006] Preferably, a base screw is threadedly connected to the lifting base, and the lifting ring is fixedly connected to the base screw.

[0007] Preferably, a plurality of reinforcing plates are fixedly provided on the outer periphery of the tooling sleeve, the number and position of the reinforcing plates correspond to the adjusting screw, and the adjusting screw thread penetrates and is connected to the reinforcing plates.

[0008] Preferably, the end portion of the adjusting screw located inside the tooling sleeve is rotatably connected to a limiting arc plate, and an inner arc thread is provided on the inner side of the limiting arc plate.

[0009] Preferably, a plurality of limiting guide rods are slidably connected to the reinforcing plate, and the limiting guide rods are fixedly connected to the limiting arc plate.

[0010] Beneficial effects of the utility model:

[0011] (1) The design of the fixture of the utility model makes the disassembly of the screw of the plastic extruder faster and more convenient, and no longer requires a lot of manpower and time, which greatly improves production efficiency and reduces production costs.

[0012] (2) The fixture design of the utility model avoids the problems of barrel damage and screw deformation that may be caused by manual disassembly, effectively protects the barrel and screw, ensures the reuse of the screw and the performance of the extruder, and improves the quality of the product.

[0013] (3) The fixture design of the utility model has good versatility and can be applied to different types of plastic extruder screws. It has strong adaptability and is easy to promote and apply.

[0014] (4) The fixture of the present invention is simple and clear in design, easy to operate, does not require complex operating skills, reduces operating difficulty, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of the utility model from a top view;

[0018] Figure 3 This is a schematic diagram of the main structure of the utility model as a whole;

[0019] Figure 4 This utility model Figure 3 Schematic diagram of the cross-sectional structure in the AA direction.

[0020] In the figure: 1. Tool sleeve; 2. Lifting base; 3. Base screw; 4. Lifting ring; 5. Reinforcement plate; 6. Adjustment screw; 7. Adjustment cap; 8. Limit guide rod; 9. Limit arc plate; 10. Internal arc thread. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-Figure 4 As shown, the utility model is a tooling fixture for disassembling the screw of a polyolefin plastic extruder, comprising a tooling sleeve 1, wherein the tooling sleeve 1 is a circular through tube with openings at both ends, one end of the tooling sleeve 1 is fixedly connected to a lifting base 2, and a lifting ring 4 is connected to the lifting base 2, and a plurality of adjusting screws 6 are threadedly connected to the outer wall of the tooling sleeve 1 away from the lifting base 2, and the adjusting screws 6 pass through the side wall of the tooling sleeve 1, and the plurality of adjusting screws 6 are distributed in a ring array, and the end of the adjusting screw 6 located on the outside of the tooling sleeve 1 is fixedly connected to an adjusting cap 7.

[0023] In an optional embodiment, a base screw rod 3 is threadedly connected to the lifting base 2 , and the lifting ring 4 is fixedly connected to the base screw rod 3 .

[0024] It should be noted that, by arranging the base screw 3 to install the lifting ring 4, the installation position of the lifting ring 4 can be adjusted to ensure accurate alignment of the screw and the barrel.

[0025] In an optional embodiment, a plurality of reinforcing plates 5 are fixedly provided on the outer periphery of the tooling sleeve 1 , the number and position of the reinforcing plates 5 correspond to the adjusting screw 6 , and the adjusting screw 6 is threadedly connected to the reinforcing plates 5 .

[0026] It should be noted that the reinforcement plate 5 is provided to increase the thread connection range of the adjustment screw 6, thereby improving the overall connection strength of the entire adjustment screw 6, ensuring stability when the screw is clamped, and effectively avoiding damage to the thread.

[0027] In an optional embodiment, the end of the adjusting screw 6 located inside the tool sleeve 1 is rotatably connected to a limiting arc plate 9 , and an inner arc thread 10 is provided on the inner side of the limiting arc plate 9 .

[0028] It should be noted that by setting a limiting arc plate 9 to clamp the screw, the contact area with the screw is increased to improve the stability of the screw tool clamping, and at the same time, an inner arc thread 10 is set to cooperate with the outer thread of the screw to further improve the stability of the screw clamping and achieve the limitation of the screw.

[0029] In an optional embodiment, a plurality of limiting guide rods 8 are slidably connected to the reinforcing plate 5 , and the limiting guide rods 8 are fixedly connected to the limiting arc plate 9 .

[0030] It should be noted that the limiting guide rod 8 is provided to guide the movement of the limiting arc plate 9 and improve the connection strength between the limiting arc plate 9, the reinforcing plate 5 and the tooling sleeve 1.

[0031] Working Principle of the Utility Model: This fixture primarily consists of a detachable module, a precise positioning mechanism, an optimized workflow, a variety of disassembly tools, and strict quality control. The screw is preheated to reduce its hardness and strength for easier disassembly; the preheating temperature is 100°C-200°C, and the preheating time is 30-60 minutes. Based on the size and shape of the screw, a corresponding tooling sleeve 1 is selected and placed on the end of the screw. The fixture can be adjusted to accommodate different screw types. A lifting ring 4 and an adjustment screw 6 are provided at one end of the fixture to ensure precise alignment of the screw and barrel. At the same time, hydraulic or pneumatic clamping methods are used to further ensure the fixation of the screw and the barrel; hydraulic or pneumatic methods are used to apply pressure to the screw at the lifting ring 4 to gradually separate it from the barrel; the applied pressure is 10MPa-100MPa, and the application time is 1 minute-10 minutes; according to the type and size of the screw, corresponding disassembly tools are selected, such as bolt wrenches, nut wrenches, cutting tools, hammers and screwdrivers, etc.; use these tools to remove the screw from the barrel.

[0032] The above describes an embodiment of the present invention in detail. However, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent application of the present invention.

Claims

1. A fixture for disassembling the screw of a polyolefin plastic extruder, characterized in that: The utility model comprises a tool sleeve (1), wherein the tool sleeve (1) is a circular through tube with two ends open, one end of the tool sleeve (1) is fixedly connected to a lifting base (2), the lifting base (2) is connected to a lifting ring (4), the outer wall of the tool sleeve (1) away from the lifting base (2) is threadedly connected to a plurality of adjustment screws (6), the adjustment screws (6) pass through the side wall of the tool sleeve (1), the plurality of adjustment screws (6) are distributed in a ring array, and the end of the adjustment screw (6) located on the outer side of the tool sleeve (1) is fixedly connected to an adjustment cap (7).

2. A fixture for disassembling the screw of a polyolefin plastic extruder according to claim 1, characterized in that: The lifting base (2) is threadedly connected to a base screw rod (3), and the lifting ring (4) is fixedly connected to the base screw rod (3).

3. A fixture for disassembling the screw of a polyolefin plastic extruder according to claim 1, characterized in that: A plurality of reinforcing plates (5) are fixedly provided on the outer periphery of the tooling sleeve (1); the number and position of the reinforcing plates (5) correspond to the adjusting screw (6); and the adjusting screw (6) is threadedly connected to the reinforcing plates (5).

4. A fixture for disassembling the screw of a polyolefin plastic extruder according to claim 3, characterized in that: The end portion of the adjusting screw (6) located inside the tool sleeve (1) is rotatably connected to a limiting arc plate (9), and an inner arc thread (10) is provided inside the limiting arc plate (9).

5. A fixture for disassembling the screw of a polyolefin plastic extruder according to claim 4, characterized in that: A plurality of position-limiting guide rods (8) are slidably connected to and penetrate the reinforcing plate (5), and the position-limiting guide rods (8) are fixedly connected to the position-limiting arc plate (9).

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