Screw assembly of extruder

Abstract

The screw assembly comprises a screw assembly body, a conical seat is installed at the end of the screw assembly body, a positioning column is fixedly installed on the surface of the conical seat, meanwhile, a spiral blade is fixedly installed on the outer side of the circumference of a screw piece on the screw assembly body, and the positioning column is fixedly installed on the outer side of the circumference of the screw piece. A first reinforcing rod is fixedly installed on the spiral blade, and a second reinforcing rod is fixedly installed on one side of the first reinforcing rod. According to the screw assembly of the extruder, in the process that materials are extruded by the spiral blades, the spiral blades are subjected to friction force and extrusion force of the materials; the three groups of reinforcing rods provide additional support for the blades, so that the acting force can be effectively resisted, and the deformation of the blades is reduced; the extruder can generate vibration in the operation process, the overall rigidity of the blade can be improved through the arrangement of the reinforcing assembly, the sensitivity of the blade to vibration is reduced, blade damage caused by vibration is reduced, and the service life of the screw assembly is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of extruders, in particular to a screw assembly of an extruder. Background Art

[0002] The screw assembly of an extruder is the core component of the extruder. Its working principle is to propel the material forward through rotation, and in the process of propulsion, the material is heated, compressed, mixed, and plasticized. Specifically, the material enters the screw from the hopper and is propelled forward by the rotating screw. This section of the screw usually has a large pitch and depth to accommodate and convey large amounts of material.

[0003] When the auger blades (spiral blades) on the outside of the extruder screw circumference push the material, when the processed material contains particles or impurities with higher hardness, these particles will generate greater impact and friction on the spiral blades during the screw rotation and advancement process, which may cause the blades to deform under long-term action; for high-viscosity materials, they will generate greater viscous resistance when flowing in the screw, causing the spiral blades to bear greater pressure, which is also prone to deformation and reduces the service life of the screw assembly. Utility Model Content

[0004] The purpose of the present invention is to provide a screw assembly for an extruder to solve the defects mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, a screw assembly of an extruder is provided, comprising a screw assembly body, a conical seat being installed at the end of the screw assembly body, and a positioning column being fixedly installed on the surface of the conical seat, and a spiral blade being fixedly installed on the outer side of the circumference of the screw member on the screw assembly body, and a first reinforcing rod being fixedly installed on the spiral blade, a second reinforcing rod being fixedly installed on one side of the first reinforcing rod, and a third reinforcing rod being fixedly installed on the side of the second reinforcing rod away from the first reinforcing rod; a docking seat being provided at the end of the screw member, and a plug hole being provided inside the docking seat.

[0006] Preferably, the axial cross-sections of the spiral blade and the screw member are concentric circle structures, and a conical seat is provided at the bottom of the spiral blade, and the conical seat coincides with the central axis of the spiral blade.

[0007] Preferably, the spiral blade is evenly mounted with a first reinforcing rod, a second reinforcing rod and a third reinforcing rod, and the first reinforcing rod, the second reinforcing rod and the third reinforcing rod are centrally symmetrical structures with respect to the screw member.

[0008] Preferably, the three groups of reinforcing rods are all cylindrical structures made of metal material, and the angle between two adjacent groups of reinforcing rods is 120°.

[0009] Preferably, the size of the positioning column is adapted to that of the plug hole, and the length of the positioning column is equal to the depth of the plug hole. Meanwhile, the cross-sections of the positioning column and the plug hole are both regular hexagonal.

[0010] Preferably, the conical seat is inserted into the insertion hole opened inside the docking seat through the positioning column thereon, and three groups of equidistant screw holes are evenly arranged on the outside of the positioning column. At the same time, three groups of equidistant mounting holes are evenly arranged on the outside of the circumference of the docking seat. The screw holes are adapted to the size of the fixing bolts, and the fixing bolts pass through the mounting holes opened on the docking seat and are screwed into the inside of the screw holes.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. In the present invention, the spiral blades are subjected to friction and extrusion forces from the material during extrusion. The three sets of reinforcing rods provide additional support for the blades, effectively resisting these forces and reducing blade deformation. The extruder will vibrate during operation, and the reinforcement assembly can increase the overall rigidity of the blades, reduce their sensitivity to vibration, reduce damage to the blades caused by vibration, and extend the service life of the screw assembly.

[0013] 2. The utility model uses the conical seat at the end of the screw assembly body to extrude materials. During long-term use, its surface wears severely and needs to be replaced. In order to avoid the entire screw assembly body from being scrapped, the conical seat can be disassembled from the end of the docking seat, which facilitates the replacement of a single conical seat, so that the rest of the screw assembly body can be used normally, reducing the maintenance cost of the extruder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view schematic diagram of the structure of the utility model;

[0015] Figure 2 for Figure 1 Bottom view of

[0016] Figure 3 for Figure 1 A top view of

[0017] Figure 4 Schematic diagram of the conical seat and its installation structure.

[0018] Numbers in the figure: 1, screw assembly body; 2, screw member; 3, spiral blade; 4, first reinforcement rod; 41, second reinforcement rod; 42, third reinforcement rod; 5, docking seat; 6, conical seat; 61, positioning column; 62, screw hole; 63, fixing bolt; 64, mounting hole; 65, plug hole. DETAILED DESCRIPTION

[0019] Please refer to Figures 1-4 The utility model provides a kind of screw assembly of extruder, including screw assembly body 1, screw assembly body 1 end is equipped with conical seat 6, and the surface of conical seat 6 is fixedly installed with locating column 61, while screw assembly body 1 on screw piece 2 circumferential outside is fixedly installed with helical blade 3, and helical blade 3 is fixedly installed with first reinforcing rod 4, and the side of first reinforcing rod 4 is fixedly installed with second reinforcing rod 41, while the side of second reinforcing rod 41 away from first reinforcing rod 4 is fixedly installed with third reinforcing rod 42;Screw piece 2 end is provided with butt joint seat 5, and butt joint seat 5 is internally provided with insertion hole 65.

[0020] Working principle: when using, first reinforcing rod 4, second reinforcing rod 41 and third reinforcing rod 42 are uniformly installed on helical blade 3;Three groups of reinforcing rods are cylindrical structures made of metal material;Combined together to form the reinforcing assembly of helical blade 3, when helical blade 3 is used, helical blade 3 will be subjected to friction force and extrusion force of material during extrusion process;Three groups of reinforcing rods provide additional support for blade, which can effectively resist these forces and reduce blade deformation;Extruder will vibrate during operation, the setting of reinforcing assembly can increase the overall stiffness of blade, reduce the sensitivity of blade to vibration, reduce blade damage caused by vibration and prolong the service life of screw assembly;The conical seat 6 at the end of screw assembly body 1 is used for extruding material, and its surface is severely worn during long-term use, so it needs to be replaced, to avoid scrapping the whole screw assembly body 1, conical seat 6 can be detached from the end of butt joint seat 5, which facilitates the replacement of single conical seat 6, so that the remaining part of screw assembly body 1 can be used normally, reducing the maintenance cost of extruder.

[0021] The axial section of helical blade 3 and screw piece 2 is concentric structure, and the bottom of helical blade 3 is provided with conical seat 6, and the central axis of conical seat 6 and helical blade 3 coincides.

[0022] As a preferred embodiment, first reinforcing rod 4, second reinforcing rod 41 and third reinforcing rod 42 are uniformly installed on helical blade 3, and first reinforcing rod 4, second reinforcing rod 41 and third reinforcing rod 42 are centrally symmetric about screw piece 2.

[0023] Three groups of reinforcing rods are cylindrical structures made of metal material, and the angle between adjacent two groups of reinforcing rods is 120°.

[0024] As a preferred embodiment, the size of locating column 61 and insertion hole 65 is matched, the length of locating column 61 is equal to the depth of insertion hole 65, and the cross section of locating column 61 and insertion hole 65 is hexagonal.

[0025] The conical seat 6 is inserted into the insertion hole 65 opened inside the docking seat 5 through the positioning column 61 thereon, and three groups of equidistant screw holes 62 are evenly arranged on the outside of the positioning column 61. At the same time, three groups of equidistant mounting holes 64 are evenly arranged on the outer side of the circumference of the docking seat 5. The screw holes 62 are adapted to the size of the fixing bolts 63, and the fixing bolts 63 pass through the mounting holes 64 opened on the docking seat 5 and are screwed into the inside of the screw holes 62.

Claims

1. A screw assembly for an extruder, comprising a screw assembly body (1), characterized in that: The end of the screw assembly body (1) is installed with a conical seat (6), and a positioning column (61) is fixedly installed on the surface of the conical seat (6); at the same time, a spiral blade (3) is fixedly installed on the outer circumference of the screw member (2) on the screw assembly body (1), and a first reinforcing rod (4) is fixedly installed on the spiral blade (3); a second reinforcing rod (41) is fixedly installed on one side of the first reinforcing rod (4), and a third reinforcing rod (42) is fixedly installed on the side of the second reinforcing rod (41) away from the first reinforcing rod (4); a docking seat (5) is provided at the end of the screw member (2), and a plug hole (65) is opened inside the docking seat (5).

2. The screw assembly of an extruder according to claim 1, characterized in that: The axial sections of the spiral blade (3) and the screw member (2) are concentric circle structures, and a conical seat (6) is provided at the bottom of the spiral blade (3), and the conical seat (6) coincides with the central axis of the spiral blade (3).

3. The screw assembly of an extruder according to claim 1, characterized in that: The spiral blade (3) is evenly mounted with a first reinforcing rod (4), a second reinforcing rod (41) and a third reinforcing rod (42), and the first reinforcing rod (4), the second reinforcing rod (41) and the third reinforcing rod (42) are centrally symmetrical structures with respect to the screw member (2).

4. The screw assembly of an extruder according to claim 3, characterized in that: The three groups of reinforcing rods are all cylindrical structures made of metal material, and the angle between two adjacent groups of reinforcing rods is 120 degrees.

5. The screw assembly of an extruder according to claim 1, characterized in that: The size of the positioning column (61) is adapted to that of the plug hole (65), and the length of the positioning column (61) is equal to the depth of the plug hole (65). At the same time, the cross sections of the positioning column (61) and the plug hole (65) are both regular hexagonal.

6. The screw assembly of an extruder according to claim 5, characterized in that: The conical seat (6) is inserted into the insertion hole (65) opened inside the docking seat (5) through the positioning column (61) thereon, and three groups of equally spaced screw holes (62) are evenly arranged on the outside of the positioning column (61). At the same time, three groups of equally spaced mounting holes (64) are evenly opened on the circumferential outside of the docking seat (5). The screw holes (62) are adapted to the size of the fixing bolts (63), and the fixing bolts (63) pass through the mounting holes (64) opened on the docking seat (5) and are screwed into the inside of the screw holes (62).

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