Screw structure of enhanced fluorine plastic pipe extruder

Abstract

The utility model provides a reinforced fluorine plastic pipe extruder screw structure, which relates to the field of extruder screws, and comprises a screw spindle, a mixing section and a screw flight are arranged on the outer side of the screw spindle, one end of the screw spindle is connected with a reinforcing component through a conical section, the other side of the reinforcing component is connected with an extrusion section through a conical section, and the extrusion section is connected with the mixing section through a conical section. The mixing section is arranged between the screw flights, the mixing section comprises a ring knot and three-edged teeth fixed by the ring knot, the reinforcing assembly comprises a connecting shaft, two ends of the connecting shaft are connected with the conical section, a fixing disc is fixed on the outer side of the connecting shaft, a supporting rod is movably connected to the peripheral edge of the fixing disc, and meanwhile, an axial through hole is formed in the fixing disc. The extruder screw rod solves the problems that the end part is abraded and the rod body is deformed due to long-term use of the existing extruder screw rod, and the material mixing effect is deviated at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of extruder screws, and particularly relates to a screw structure of an enhanced fluoroplastic pipe extruder. Background Art

[0002] The extruder screw is the most important component in plastic processing equipment, which is directly related to the plasticizing effect and output of the plastic processing machine. The extruder screw rotates in the barrel under high temperature, high pressure and large torque. Since it has to strongly push the material forward during rotation, and at the same time, it itself has to withstand strong frictional force and the erosion of plastic decomposition and corrosion gases, the material of the extruder screw must have high mechanical strength, be able to withstand huge torque and not deform under high temperature and high pressure conditions. After retrieval, the prior art (Publication No.: CN219667424U) records "a high-fill screw for a plastic extruder, including a high-fill screw body with a mixing section for correspondingly adjusting the raw materials entering the plastic extruder. Since the external connecting shaft and the internal connecting shaft are connected by a fixed connecting block, and the shaft body of the internal connecting shaft is connected to the output end of the external driving motor, the rotation of the internal connecting shaft drives the external connecting shaft to rotate, and the rotation of the external connecting shaft drives the mixing block in the external opening groove to rotate correspondingly. Therefore, adjusting the position of the mixing block can correspondingly adjust the working state of the plastic raw materials in the plastic extruder. Subsequently, pushing the external connecting sleeve drives the sliding block to correspondingly change its position on the internal connecting shaft, and the angular position of the internal connecting shaft changes correspondingly, so that the height of the mixing block changes correspondingly along the direction of the external opening groove."

[0003] Although the extruder screw in the prior art realizes the corresponding adjustment with the raw materials, there are still some deficiencies: the existing extruder screw is usually supported and connected by shaft seats at both ends, and the middle part is suspended in the barrel. As a result, during long-term use, affected by torque and the gravity of the raw materials, the wear between the screw end and the shaft seat will be aggravated, and the screw may be deformed. Secondly, although the general screw has a mixing effect, the mixing effect is poor during continuous conveying. Content of the Utility Model

[0004] In order to overcome the defects of the prior art, the utility model provides a screw structure of an enhanced fluoroplastic pipe extruder to solve the problems that the existing extruder screw has wear at the end and deformation of the rod body during long-term use, and at the same time, there is a problem of poor mixing effect.

[0005] To achieve the above object, an enhanced screw structure for a fluoroplastic pipe extruder is provided, including: a screw main shaft, a mixing section and screw ridges are provided on the outer side of the screw main shaft, and one end of the screw main shaft is connected with a reinforcement component through a tapered section, and the other side of the reinforcement component is connected with an extrusion section through a tapered section. The mixing section is arranged between the screw ridges, and the mixing section includes a ring knot and triangular teeth fixed to the ring knot. The reinforcement component includes a connecting shaft connected to the tapered section at both ends, a fixing disk is fixed on the outer side of the connecting shaft, a support rod is movably connected to the outer periphery of the fixing disk, and an axially penetrating through hole is opened inside the fixing disk.

[0006] Further, the screw ridges are spirally fixed on the outer walls of the shaft rods of the screw main shaft and the extrusion section, and the tapered sections are respectively connected to the opposite ends of the shaft rods of the screw main shaft and the extrusion section.

[0007] Further, the ring knot is in a circular ring shape, the triangular teeth are arranged in an annular matrix structure on the outer periphery of the circular ring, and the ring knots are arranged at intervals in the axial direction of the screw main shaft.

[0008] Further, the outer diameter of the connecting shaft is smaller than the outer diameters of the shaft rods of the screw main shaft and the extrusion section, and the outer side of the connecting shaft is provided with an expansion section.

[0009] Further, a central hole is opened in the center of the fixing disk, the connecting shaft is inserted into the central hole, and there is a distance between both sides of the fixing disk and the tapered section.

[0010] Further, a radially extending sliding groove is opened on the outer edge of the fixing disk, limiting grooves are opened on the groove walls on both sides of the sliding groove, the support rod is slidably inserted into the sliding groove, a spring is arranged at the bottom of the inner groove of the sliding groove, and a mechanical seal is arranged at the outer groove opening of the sliding groove.

[0011] Further, a ball is connected to the outer end of the support rod, a limiting block is fixed on the outer side of the support rod, and the limiting block is slidably connected in the limiting groove.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. By arranging the reinforcement component between the screw main shaft and the extrusion section, the aggregation amount of the raw material is increased here through the expansion section on the outer side of the connecting shaft, and then through the conveying and extrusion action of the screw itself, part of the raw material is extruded from the through hole of the fixing disk to the other side, achieving the effect of secondary mixing. Through the support rod and the ball elastically and movably connected around the fixing disk, when the screw is installed, the ball contacts the inner wall of the barrel, and at this time, the fixing disk and the connecting shaft play a supporting role in the middle part of the whole screw, thereby enhancing the anti-pressure and anti-torque effects of the screw itself, and further extending its service life;

[0014] 2. By utilizing the mixing section between the screw spindles, as well as the knots and triangular teeth included in the mixing section, during the initial feeding and conveying process, the raw materials are axially stirred by the triangular teeth, that is, a good material mixing effect is achieved through the triangular teeth in the gap between the screw spindle and the barrel, thereby improving the kneading effect of the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0016] Figure 2 For the embodiment of the present invention Figure 1 Schematic diagram of the structure at position A.

[0017] Figure 3 It is a schematic diagram of the axial sectional structure of the reinforcement component of an embodiment of the present invention.

[0018] Figure 4 It is a schematic diagram of the side view structure of the mixing section of an embodiment of the present invention.

[0019] In the figure: 1. Screw spindle; 2. Mixing section; 21. Knot; 22. Triangular tooth; 3. Screw rib; 4. Tapered section; 5. Expansion section; 6. Extrusion section; 7. Reinforcement component; 71. Connecting shaft; 72. Fixed disk; 721. Limiting groove; 722. Mechanical seal; 723. Slide groove; 724. Spring; 73. Support rod; 74. Ball; 75. Through hole; 76. Central hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Referring to Figures 1 to 4 As shown, the present invention provides a screw structure for an enhanced fluoroplastic pipe extruder, including: a screw spindle 1, with a mixing section 2 and screw ribs 3 arranged outside the screw spindle 1. One end of the screw spindle 1 is connected to a reinforcement component 7 through a tapered section 4, and the other side of the reinforcement component 7 is connected to an extrusion section 6 through a tapered section 4. The mixing section 2 is arranged between the screw ribs 3, and the mixing section 2 includes a knot 21 and triangular teeth 22 fixed to the knot 21. The reinforcement component 7 includes a connecting shaft 71 connected to the tapered section 4 at both ends, with a fixed disk 72 fixed to the outside of the connecting shaft 71. The outer periphery of the fixed disk 72 is movably connected to a support rod 73, and at the same time, an axially penetrating through hole 75 is opened inside the fixed disk 72.

[0021] In this embodiment, the screw spindle 1, the mixing section 2, the reinforcement component 7, and the extrusion section 6 constitute the main structure of the screw structure for the enhanced fluoroplastic pipe extruder involved in this application, which is used for the raw material extrusion process during the production of fluoroplastic pipes.

[0022] Specifically, one end of the screw main shaft 1 in the extrusion section 6 is the driving end, and the raw material is connected from the upper side of the driving end of the storage cylinder downward to the barrel outside the screw main shaft 1. That is, in this application, the raw material of the fluoroplastic pipe is transported from the driving end towards the extrusion section 6.

[0023] As Figure 1 and Figure 4 shown, the screw edge 3 is spirally fixed on the outer walls of the shafts of the screw main shaft 1 and the extrusion section 6, and the conical section 4 is respectively connected to the opposite ends of the shafts of the screw main shaft 1 and the extrusion section 6. The loop knot 21 is set in a circular ring shape, and the three-edge teeth 22 are arranged in an annular matrix structure on the outer circumference of the circular ring, and the loop knots 21 are arranged at intervals in the axial direction of the screw main shaft 1.

[0024] Specifically, the shafts of the screw main shaft 1 and the extrusion section 6 are set to have the same outer diameter, and are coaxially connected by a connecting shaft 71.

[0025] As a preferred embodiment, by setting the loop knot 21 and the three-edge teeth 22, an initial stirring effect on the raw material is achieved during the transportation process, and a certain shearing effect on the raw material in the circumferential direction is obtained.

[0026] As Figures 1 to 3 shown, the outer diameter of the connecting shaft 71 is smaller than the outer diameters of the shafts of the screw main shaft 1 and the extrusion section 6, and the outside of the connecting shaft 71 is provided with an expansion section 5. A central hole 76 is opened in the center of the fixed disk 72, and the connecting shaft 71 is inserted into the central hole 76. There is a distance between both sides of the fixed disk 72 and the conical section 4. Radially extending sliding grooves 723 are opened on the outer edge of the fixed disk 72, and limiting grooves 721 are opened on the two side walls of the sliding grooves 723. The support rod 73 is slidably inserted into the sliding grooves 723. At the same time, a spring 724 is provided at the bottom of the inner groove of the sliding grooves 723, and a mechanical seal 722 is provided at the outer slot opening of the sliding grooves 723. The outer end of the support rod 73 is connected with a ball 74, and a limiting block is fixed on the outside of the support rod 73, and the limiting block is slidably connected in the limiting groove 721.

[0027] As a preferred embodiment, by setting the expansion section 5, the accumulation amount of the raw material here is increased. Then, under the action of transportation and extrusion, part of the raw material is extruded from the through hole 75 to achieve re-dispersion, and then a re-mixing effect is achieved on the side close to the extrusion section 6.

[0028] As a preferred embodiment, as the fixed disk 72 rotates synchronously with the screw main shaft 1, the ball 74 on the outside of the support rod 73 rolls in contact with the inner wall of the barrel, thereby increasing the overall stability and support performance of the screw, and thus extending the service life.

[0029] During use, by utilizing the mixing section between the screw spindles, as well as the knots and triangular teeth included in the mixing section, during the initial feeding and conveying process, the raw materials are axially stirred by the triangular teeth, that is, a good mixing effect is achieved by the triangular teeth in the gap between the screw spindle and the barrel. The reinforcement component is arranged between the screw spindle and the extrusion section, so that the accumulation amount of the raw materials is increased at this place through the expansion section outside the connecting shaft. Then, through the conveying and extrusion action of the screw itself, part of the raw materials are extruded from the through holes of the fixed plate to the other side to achieve the effect of secondary mixing. Through the support rods and balls elastically and movably connected around the fixed plate, when the screw is installed, the balls are in contact with the balls on the inner wall of the barrel. At this time, the fixed plate and the connecting shaft play a supporting role in the middle part of the whole screw, thereby strengthening the anti-pressure and anti-torque effects of the screw itself, and further extending its service life.

[0030] The enhanced screw structure of the fluoroplastic pipe extruder of the present utility model can effectively solve the problems that the existing screw of the extruder has wear at the end and deformation of the rod body after long-term use, and at the same time has a deviation in the mixing effect. On the basis of the existing enhanced screw structure technology of the fluoroplastic pipe extruder, the anti-wear and anti-deformation performance of the screw is enhanced, and the mixing effect of the screw is further improved.

Claims

1. An enhanced screw structure for a fluoroplastic pipe extruder, comprising: Screw main shaft (1), characterized in that: a mixing section (2) and screw ridges (3) are provided on the outer side of the screw main shaft (1), and one end of the screw main shaft (1) is connected to a reinforcement assembly (7) through a tapered section (4), and the other side of the reinforcement assembly (7) is connected to an extrusion section (6) through a tapered section (4). The mixing section (2) is arranged between the screw ridges (3), and the mixing section (2) includes a loop knot (21) and a triangular tooth (22) fixed to the loop knot (21). The reinforcement assembly (7) includes a connecting shaft (71) with both ends connected to the tapered section (4), and a fixed disk (72) is fixed on the outer side of the connecting shaft (71). A support rod (73) is movably connected to the outer peripheral edge of the fixed disk (72). At the same time, an axially penetrating through hole (75) is opened inside the fixed disk (72).

2. The screw structure of an enhanced fluoroplastic pipe extruder according to claim 1, wherein The screw ridges (3) are spirally fixed on the outer walls of the shafts of the screw main shaft (1) and the extrusion section (6), and the tapered sections (4) are respectively connected to the opposite ends of the shafts of the screw main shaft (1) and the extrusion section (6).

3. An enhanced fluoroplastic pipe extruder screw structure according to claim 1, characterized in that, The loop knot (21) is set in a circular ring shape, and the triangular teeth (22) are arranged in an annular matrix structure on the outer periphery of the circular ring, and the loop knots (21) are arranged at intervals in the axial direction of the screw main shaft (1).

4. An enhanced fluoroplastic pipe extruder screw structure according to claim 1, characterized in that, The outer diameter of the connecting shaft (71) is smaller than the outer diameters of the shafts of the screw main shaft (1) and the extrusion section (6), and an expansion section (5) is provided on the outer side of the connecting shaft (71).

5. An enhanced fluoroplastic pipe extruder screw structure according to claim 1, characterized in that, A central hole (76) is opened in the center of the fixed disk (72), and the connecting shaft (71) is inserted into the central hole (76). There is a gap between both sides of the fixed disk (72) and the tapered section (4).

6. The screw structure of an enhanced fluoroplastic pipe extruder according to claim 1, characterized in that, Radially extending sliding grooves (723) are opened on the outer edge of the fixed disk (72), and limiting grooves (721) are opened on the two side walls of the sliding grooves (723). The support rod (73) is slidably inserted into the sliding grooves (723). At the same time, a spring (724) is provided at the bottom of the inner groove of the sliding grooves (723), and a mechanical seal (722) is provided at the outer notch of the sliding grooves (723).

7. An enhanced fluoroplastic pipe extruder screw structure according to claim 1, characterized in that, The outer end of the support rod (73) is connected to a ball (74), and a limiting block is fixed on the outer side of the support rod (73), and the limiting block is slidably connected in the limiting groove (721).

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