Quick-release structure of extruder screw

Abstract

A kind of extruder screw quick release structure, it relates to plastic extrusion mechanical technical field;One end of barrel is fixed with mould through barrel flange, the other end of barrel is fixed with gear box through flange and bolt, screw rod is arranged in barrel, handle part of screw rod is installed with the output shaft of gear box by key groove, end part of screw rod is contacted with the setting of connecting sleeve, the outer wall of connecting sleeve is gap fit with the inner hole of output shaft, the end of output shaft is screwed with gear box gland, gear box gland is contacted with the setting of connecting sleeve, fixed bolt is screwed with gear box gland by thread, and is fixed with connecting sleeve by thread;The handle part of screw rod is provided with threaded hole.This extruder screw quick release structure, screw rod is disassembled from the tail of gear box, without disassembling mould, lifting away mould and downstream equipment, greatly improve work efficiency, reduce mould dismounting frequency, also reduce the risk of mould material leakage.

Description

Technical Field

[0001] This utility model relates to the field of plastic extrusion machinery technology, specifically to a quick-release structure for an extruder screw. Background Technology

[0002] With the increasing application of plastic products in various fields, recycling has become a development trend, including the extrusion and granulation of recycled plastics. As the market continues to develop, the demand for plastic products is increasing, and the quality requirements are also rising. Both plastic extrusion production and recycling granulation rely heavily on the extruder screw and barrel. However, the screw in an extruder needs to be disassembled periodically for cleaning, maintenance, and replacement during production. Currently, disassembling the screw in a single-screw extruder has the following disadvantages: 1. Each time the screw is disassembled, the extruder die must be removed and lifted away. Extrusion dies are generally heavy and large, requiring a crane for lifting, which many factories lack the expertise to handle. This condition creates significant difficulties for both disassembly and assembly; 2. Because there are downstream auxiliary devices upstream of the extruder, and the screw is generally quite long, these devices also hinder the screw from being pulled out of the barrel. Therefore, to pull the screw out of the barrel, it is necessary to lift the downstream auxiliary devices off the production line, or even lift the entire extruder away for screw disassembly and assembly. This greatly increases the difficulty of disassembly and assembly time, significantly impacting production. Since the extruder, die, and downstream equipment must be in a straight line during extrusion production, repeated lifting operations also cause significant trouble for subsequent production line calibration, inevitably leading to waste of extrusion raw materials. Therefore, those skilled in the art have provided a quick-release structure for the extruder screw to solve the problems mentioned in the background art. Summary of the Invention

[0003] The purpose of this invention is to provide a quick-release structure for an extruder screw to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: it includes a mold, a barrel flange, a barrel, a screw, a gearbox, a connecting sleeve, a gearbox cover, fixing bolts, a keyway, an output shaft, and a threaded hole; one end of the barrel is fixed to the mold via the barrel flange, and the other end of the barrel is fixed to the gearbox via the flange and bolts; a screw is installed inside the barrel, and the shank of the screw is connected to the output shaft of the gearbox via a keyway; a connecting sleeve is installed at the end of the screw, and the outer wall of the connecting sleeve is clearance-fitted with the inner hole of the output shaft; a gearbox cover is threaded to the end of the output shaft, and the gearbox cover is in contact with the connecting sleeve; the fixing bolt is threaded to the gearbox cover and screwed to the connecting sleeve for fixation; a threaded hole is provided at the center of the shank of the screw.

[0005] Furthermore, the connecting sleeve and fixing bolt are replaced with a screw release screw, which passes through the gearbox cover and is screwed into the threaded hole of the screw shank, and is fixed to the gearbox cover by a washer and a release nut.

[0006] Furthermore, the length of the screw disassembly lead screw is greater than the total length of the output shaft and the gearbox cover.

[0007] The beneficial effects of adopting the above structure are as follows: The quick-release structure of the extruder screw described in this utility model allows the screw to be disassembled from the tail of the gearbox, eliminating the need to disassemble the mold, lift the mold and downstream equipment, greatly improving work efficiency, reducing the frequency of mold disassembly and assembly, and also reducing the risk of mold leakage. Attached Figure Description

[0008] Figure 1 This is a working structure diagram of this utility model;

[0009] Figure 2 This is a disassembly diagram of the present invention.

[0010] Explanation of reference numerals in the attached figures:

[0011] 1. Mold, 2. Barrel flange, 3. Barrel, 4. Screw, 5. Gearbox, 6. Connecting sleeve, 7. Gearbox cover, 8. Fixing bolt, 9. Keyway, 10. Output shaft, 11. Threaded hole, 12. Screw removal screw, 13. Washer, 14. Removal nut. Detailed Implementation

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] See as Figure 1As shown, this specific embodiment adopts the following technical solution: It includes a mold 1, a barrel flange 2, a barrel 3, a screw 4, a gearbox 5, a connecting sleeve 6, a gearbox cover 7, fixing bolts 8, a keyway 9, an output shaft 10, and a threaded hole 11; one end of the barrel 3 is fixed to the mold 1 via the barrel flange 2, and the other end of the barrel 3 is fixed to the gearbox 5 via a flange and bolts. A screw 4 is provided inside the barrel 3, and the shank of the screw 4 is connected to the output shaft 10 of the gearbox 5 via the keyway 9. The end of the screw 4 contacts a connecting sleeve 6, and the outer wall of the connecting sleeve 6 is clearance-fitted with the inner hole of the output shaft 10. The connecting sleeve 6 can be easily removed during disassembly, and the output shaft 10 can be output from the gearbox 5. The end of shaft 10 is threadedly connected to a gearbox cover 7, which is in contact with the connecting sleeve 6. A fixing bolt 8 is threadedly connected to the gearbox cover 7 and then to the connecting sleeve 6. The fixing bolt 8 serves to prevent loosening and reconnects the gearbox cover 7 and the connecting sleeve 6, providing double protection against loosening. The connecting sleeve 6 serves to hold the shank of the screw 4 in place, preventing the screw 4 from retracting during extrusion and providing a thrust force to the screw 4. The gearbox cover 5 is threaded and is screwed tightly onto the end of the output shaft 10, fixing the connecting sleeve 6 and forming an integral structure with the output shaft 10. It can rotate simultaneously with the screw 4 during extrusion.

[0014] See as Figure 2 As shown, during disassembly, the screw 4 discharges the material from the barrel 3, the fixing bolt 8 is unscrewed, the gearbox cover 7 is unscrewed, and the connecting sleeve 6 is removed. Since the center of the screw 4 shank has a threaded hole 11, the screw disassembly screw 12 is passed through the gearbox cover 7 and screwed into the threaded hole 11 of the screw 4 shank. It is then fixed to the gearbox cover 7 by the washer 13 and the disassembly nut 14. The length of the screw disassembly screw 12 is greater than the total length of the output shaft 10 and the gearbox cover 7, ensuring space for wrench operation. The screw 4 is removed from the tail of the gearbox 5 by rotating the disassembly nut 14 with the wrench.

[0015] During installation, simply insert the screw 4 into the barrel 3 from the tail of the gearbox 5, insert the connecting sleeve 6, screw on the gearbox cover 7 and tighten it until it can no longer be tightened, thus ensuring that the screw 4 is installed in place. Finally, install the fixing bolt 8.

[0016] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An extruder screw quick release structure, characterized in that: It includes a mold, a barrel flange, a barrel, a screw, a gearbox, a connecting sleeve, a gearbox cover, fixing bolts, a keyway, an output shaft, and a threaded hole. One end of the barrel is fixed to the mold via the barrel flange, and the other end of the barrel is fixed to the gearbox via a flange and bolts. A screw is installed inside the barrel, and the shank of the screw is connected to the output shaft of the gearbox via a keyway. The end of the screw contacts a connecting sleeve, and the outer wall of the connecting sleeve is clearance-fitted with the inner hole of the output shaft. The end of the output shaft is threadedly connected to a gearbox cover, which contacts the connecting sleeve. The fixing bolt is threadedly connected to the gearbox cover and then screwed to the connecting sleeve for fixation. A threaded hole is provided at the center of the shank of the screw.

2. The quick release structure of an extruder screw according to claim 1, characterized in that: The connecting sleeve and fixing bolt are replaced with a screw release screw. The screw release screw passes through the gearbox cover and is screwed into the threaded hole of the screw shank. It is then fixed to the gearbox cover by a washer and a release nut.

3. The quick release structure of an extruder screw according to claim 2, characterized in that: The length of the screw disassembly lead screw is greater than the total length of the output shaft and the gearbox cover.

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