Extruder screw quick release structure

Abstract

The invention discloses a quick release structure of an extruder screw, and relates to the technical field of plastic extrusion machinery. One end of the machine barrel is fixed to the die through a machine barrel flange, the other end of the machine barrel is fixed to the gearbox through a flange and a bolt, a screw is arranged in the machine barrel, a handle of the screw is connected with an output shaft of the gearbox through a key groove, a connecting sleeve is arranged at the end of the screw in a contact mode, and the outer wall of the connecting sleeve is in clearance fit with an inner hole of the output shaft. The end part of the output shaft is screwed with a gear box gland through a thread, the gear box gland is in contact with the connecting sleeve, and a fixing bolt is screwed with the gear box gland through a thread and is screwed and fixed with the connecting sleeve; and a threaded hole is formed in the center of the handle part of the screw rod. According to the quick dismounting structure for the screw rod of the extruder, the screw rod is dismounted from the tail part of the gear box without dismounting a mold and lifting away the mold and downstream equipment, so that the working efficiency is greatly improved, the dismounting frequency of the mold is reduced, and the risk of material leakage of the mold is also reduced.

Description

Technical Field

[0001] The invention relates to the technical field of plastic extrusion machinery, in particular to a quick-disassembly structure of a screw rod of an extruder. Background Art

[0002] As plastic products are increasingly used in various fields, recycling has become a development trend, including the extrusion of plastics, recycling and granulation for reuse. With the continuous development of the market, the market demand for plastic products is increasing, and at the same time, the quality requirements for plastic products are also getting higher and higher. Plastic extrusion production and recycling granulation are inseparable from the barrel screw, and the extruder screw needs to be disassembled for cleaning, maintenance and replacement from time to time during the production process. The current production of single-screw extruder screw disassembly has the following disadvantages: 1. Each time the screw is disassembled, the extruder mold must be removed and the mold must be hoisted away. The extrusion mold is generally heavy and large, and hoisting requires driving assistance, which many factories do not have. 1. With this condition, it is very troublesome to disassemble and assemble; 2. Since there are downstream auxiliary equipment in front of the extruder, and since the screw is generally long, these auxiliary equipment also hinder the screw from being pulled out of the barrel. Therefore, in order to pull the screw out of the barrel, it is necessary to lift the downstream auxiliary equipment away from the production line, or lift the entire extruder away to disassemble and assemble the screw, which greatly increases the difficulty of disassembly and takes a long time to disassemble and assemble, which has a great impact on production. Since the extruder, mold and downstream equipment must be in a straight line during extrusion production, if the equipment is repeatedly hoisted, it will cause great trouble to calibrate the subsequent production line, which is bound to cause waste of extrusion production raw materials. Therefore, those skilled in the art provide an extruder screw quick-release structure to solve the problems raised in the above background technology. Summary of the Invention

[0003] The object of the present invention is to provide a quick-release structure for an extruder screw to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: it comprises a mold, a barrel flange, a barrel, a screw, a gear box, a connecting sleeve, a gear box cover, a fixing bolt, a keyway, an output shaft and a threaded hole; one end of the barrel is fixed to the mold through the barrel flange, and the other end of the barrel is fixed to the gear box through a flange and a bolt; a screw is arranged in the barrel, and the shank of the screw is installed and connected to the output shaft of the gear box through a keyway; the end of the screw is in contact with a connecting sleeve, and the outer wall of the connecting sleeve is clearance-matched with the inner hole of the output shaft; the end of the output shaft is screwed with a gear box cover through a thread, and the gear box cover is in contact with the connecting sleeve, and the fixing bolt is screwed to the gear box cover through a thread and is screwed and fixed with the connecting sleeve; a threaded hole is arranged at the center of the shank of the screw.

[0005] Furthermore, the connecting sleeve and fixing bolt are replaced by a screw disassembly screw, which passes through the gear box cover and is screwed to the threaded hole of the screw shank, and is fixed to the gear box cover by a gasket and a disassembly nut.

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

[0007] After adopting the above structure, the beneficial effects produced by the present invention are as follows: the extruder screw quick-disassembly structure described in the present invention allows the screw to be disassembled from the tail of the gear box without the need to disassemble the mold, lift the mold and downstream equipment, thereby greatly improving work efficiency, reducing the frequency of mold disassembly and assembly, and reducing the risk of mold leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a working structure diagram of the present invention; Figure 2 It is a disassembly structure diagram of the present invention.

[0009] Description of reference numerals: Mold 1, barrel flange 2, barrel 3, screw 4, gear box 5, connecting sleeve 6, gear box gland 7, fixing bolt 8, keyway 9, output shaft 10, threaded hole 11, screw disassembly lead screw 12, gasket 13, disassembly nut 14. DETAILED DESCRIPTION

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] See 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 gear box 5, a connecting sleeve 6, a gear box cover 7, a fixing bolt 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 through the barrel flange 2, and the other end of the barrel 3 is fixed to the gear box 5 through a flange and bolts. A screw 4 is provided in the barrel 3, and the shank of the screw 4 is installed and connected to the output shaft 10 of the gear box 5 through the keyway 9. The end of the screw 4 is in contact with a connecting sleeve 6, and the outer wall of the connecting sleeve 6 is clearance-matched with the inner hole of the output shaft 10. When disassembling, the connecting sleeve 6 can be smoothly taken out, and the output The end of the shaft 10 is screwed with a gear box cover 7 through a thread. The gear box cover 7 is in contact with the connecting sleeve 6. The fixing bolt 8 is screwed with the gear box cover 7 through a thread and is screwed and fixed with the connecting sleeve 6. The fixing bolt 8 plays an anti-loosening role, and the gear box cover 7 and the connecting sleeve 6 are connected and fixed again, playing a double insurance role of anti-loosening; the function of the connecting sleeve 6 is to support the handle of the screw 4 to prevent the screw 4 from retreating during extrusion production, and to provide a thrust force to the screw 4. The gear box cover 5 has a thread and is screwed to the end of the output shaft 10 through the thread to fix the connecting sleeve 6, forming an integral structure with the output shaft 10, and can rotate simultaneously with the screw 4 during extrusion.

[0012] See Figure 2 As shown, during disassembly, the screw 4 discharges the material in the barrel 3, unscrew the fixing bolt 8, unscrew the gear box gland 7, and take out the connecting sleeve 6. Since a threaded hole 11 is provided in the center of the shank of the screw 4, the screw disassembly screw 12 is passed through the gear box gland 7 and screwed to the threaded hole 11 of the shank of the screw 4, and fixed to the gear box gland 7 by a gasket 13 and a disassembly nut 14. The length of the screw disassembly screw 12 is greater than the total length of the output shaft 10 and the gear box gland 7, ensuring space for wrench operation. Use a wrench to rotate the disassembly nut 14 to remove the screw 4 from the tail of the gear box 5.

[0013] During installation, just insert the screw 4 into the barrel 3 from the tail of the gear box 5, insert the connecting sleeve 6, screw on the gear box cover 7 and screw it until it can't be turned anymore, so as to ensure that the screw 4 is installed in place, and finally install the fixing bolt 8.

[0014] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick-release structure for an extruder screw, characterized by: It comprises a mould, a barrel flange, a barrel, a screw, a gear box, a connecting sleeve, a gear box gland, a fixing bolt, a keyway, an output shaft and a threaded hole; one end of the barrel is fixed to the mould through the barrel flange, and the other end of the barrel is fixed to the gear box through a flange and bolts; a screw is arranged in the barrel, the shank of the screw is installed and connected to the output shaft of the gear box through a keyway, the end of the screw is contacted with a connecting sleeve, the outer wall of the connecting sleeve is clearance-matched with the inner hole of the output shaft, the end of the output shaft is screwed with the gear box gland through a thread, the gear box gland is contacted with the connecting sleeve, the fixing bolt is screwed to the gear box gland through a thread, and is screwed and fixed to the connecting sleeve; a threaded hole is arranged at the centre of the shank of the screw.

2. The extruder screw quick-release structure according to claim 1, characterized in that: The connecting sleeve and fixing bolt are replaced by a screw disassembly screw rod, which passes through the gear box gland and is screwed to the threaded hole of the screw shank, and is fixed to the gear box gland by a gasket and a disassembly nut.

3. The extruder screw quick-release structure according to claim 2, characterized in that: The length of the screw rod for removing the screw rod is greater than the total length of the output shaft and the gear box gland.

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