Core rod concentric adjusting mechanism of extruder and extruder

Abstract

The core rod concentric adjusting mechanism comprises a top plate, a bottom plate and a bottom frame, the center of the top plate is connected with a core rod assembly, the lower end of the core rod assembly is connected with an inner die, a material cylinder is fixed to the center of the bottom plate, the lower end of the material cylinder is connected with a die holder, an outer die is fixed in the die holder, and the outer die is connected with the inner die. The core rod assembly is connected with a driven gear, the top plate is connected with a driving device used for driving the driven gear to rotate, the problem that the coaxiality of the core rod and the material cylinder can be affected after a material blank is placed into the material cylinder by an extruder is solved, the driving device is arranged to drive the core rod assembly to rotate, the perpendicularity of the core rod assembly is adjusted, and the core rod assembly is not prone to falling off. The coaxiality of the core rod assembly and the material cylinder is improved, the gap between the material cylinder and the core rod assembly is uniform, and the forming quality of pipes is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, in particular to a core rod concentricity adjustment mechanism of an extruder and an extruder. Background Art

[0002] When feeding the extruder, the die base and the outer die are usually disassembled together to expose the material cylinder. After the material is put into the material cylinder, the die base and the outer die are installed and locked to seal the material blank in the material cylinder. The introduction of the material will cause the core rod in the material cylinder to shift, resulting in uneven wall of the extruded pipe. Therefore, in order to ensure the coaxiality of the core rod and the material cylinder and the quality of the extruded pipe, the core rod concentricity adjustment mechanism and the extruder of the extruder are designed. By adjusting the coaxiality of the core rod and the material cylinder, the wall thickness of the extruded pipe is kept uniform. Utility Model Content

[0003] The utility model aims to provide a core rod concentricity adjustment mechanism for an extruder and an extruder, wherein a driving device is provided, and the rotation of a rotary rod and the transmission of a chain are utilized so that a core rod assembly offset in a material cylinder after a blank is placed therein can be rotated, and the self-rotation of the core rod assembly is utilized to adjust the position of the core rod assembly, thereby improving the coaxiality of the core rod assembly and the material cylinder, making the gap between the material cylinder and the core rod assembly evenly distributed, and improving the product quality of the extruded pipe.

[0004] The utility model provides the following technical solution: a core rod concentric adjustment mechanism of an extruder comprises a top plate, a bottom plate and a bottom frame, a core rod assembly is connected to the center of the top plate, an inner mold is connected to the lower end of the core rod assembly, a material cylinder is fixed to the center of the bottom plate, the core rod assembly is located at the center of the material cylinder, a mold base is connected to the lower end of the material cylinder, an outer mold is fixed in the mold base, a driven gear is connected to the core rod assembly, and a driving device for driving the driven gear to rotate is connected to the top plate.

[0005] In order to manually control the rotation of the driven gear and rotate the core rod assembly, the driving device includes a rotary rod rotatably connected to the top plate and a driving gear fixed on the rotary rod, one end of the rotary rod is connected to a hand wheel, and the driving gear and the driven gear are connected by a chain.

[0006] In order to improve the stability of the chain transmission, a clamping gear is also connected to the top plate, and the clamping gear is located on the side of the chain.

[0007] In another embodiment, the core rod assembly includes a core rod connecting shaft and a core rod body, and the core rod body is inserted into the lower end of the core rod connecting shaft.

[0008] In order to control the up and down movement of the core rod connecting shaft, a worm elevator is also fixed on the top plate, and a worm is connected to the internal thread of the worm elevator. The lower end of the worm is against the upper surface of the core rod connecting shaft. The worm and the core rod connecting shaft are connected through a bearing seat, and the core rod connecting shaft is connected to the bearing seat through a bearing.

[0009] In order to limit the core rod connecting shaft, a rotating sleeve is provided on the outer surface of the core rod connecting shaft, the rotating sleeve is connected to the top plate through a bearing, the driven gear is fixed on the rotating sleeve, and the core rod connecting shaft moves up and down in the rotating sleeve under the action of the worm.

[0010] In order to ensure that the up and down movement of the core rod connecting shaft does not affect the rotation of the driven gear, a plurality of key slots are formed on the surface of the core rod connecting shaft, and a plurality of grooves matching the key slots are formed on the inner wall of the rotating sleeve. The matching of the grooves and the key slots enables the rotating sleeve to drive the core rod connecting shaft to rotate.

[0011] The utility model provides the following technical solution: an extruder, including the core rod concentric adjustment mechanism of the extruder, and also including a middle plate located between the top plate and the bottom plate, a servo electric cylinder is fixed on the top plate, the telescopic end of the servo electric cylinder is connected to the middle plate, the lower end of the middle plate is connected to a push rod, and the push rod is located between the core rod assembly and the material cylinder.

[0012] In order to control the lifting height of the mold base, a cylinder mounting plate is fixed on the material cylinder, and a lifting cylinder is also fixed on the cylinder mounting plate. The telescopic end of the lifting cylinder is connected with a cross plate, and the cross plate is connected to the mold base.

[0013] In order to improve the sealing of the mold, a locking cylinder is fixed under the cylinder mounting plate, the telescopic end of the locking cylinder is connected to a locking module, the upper end of the mold base is connected to a mold base flange, the lower end of the material cylinder is connected to a cylinder flange, and the locking module clamps the mold base flange and the cylinder flange.

[0014] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0015] (1) By setting a driving device, the core rod assembly offset in the cylinder after the blank is placed can be rotated by the rotation of the rotating rod and the transmission of the chain, and the core rod assembly is adjusted by the self-rotation of the core rod assembly, so as to improve the coaxiality between the core rod assembly and the cylinder, so that the gap between the cylinder assembly and the core rod is evenly distributed, thereby improving the product quality of the extruded pipe;

[0016] (2) By setting up a worm and a worm elevator, the worm elevator is used to control the lifting of the worm. The lifting of the worm will drive the core rod connecting shaft to move up and down, thereby causing the core rod to move up and down, controlling the gap width between the outer die and the inner die, adjusting the thickness of the extruded pipe, and producing pipes of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0019] Figure 2 It is a stereogram of another viewing angle of the present utility model;

[0020] Figure 3 It is a cross-sectional view of the overall structure of the utility model;

[0021] Figure 4 It is a cross-sectional view of another viewing angle of the utility model;

[0022] Figure 5 yes Figure 4 A partial enlarged schematic diagram of the middle B area;

[0023] Figure 6 yes Figure 4 A partial enlarged schematic diagram of the middle C area;

[0024] In the figure: 1. worm; 2. core rod body; 3. rotary rod; 4. hand wheel; 5. driving gear; 6. clamping gear; 7. driven gear; 8. chain; 9. worm elevator; 10. rotating sleeve; 11. core rod connecting shaft; 12. bearing seat; 21. electric cylinder mounting plate; 22. servo electric cylinder; 23. top plate; 24. middle plate; 25. bottom plate; 26. bottom frame; 27. support column; 28. push rod; 29. ​​push rod fixing flange; 31. mold base; 32. outer mold; 33. inner mold; 34. material cylinder; 35. cylinder mounting plate; 36. lifting cylinder; 37. cross plate; 38. positioning guide column; 39. clamping cylinder; 391. locking module; 392. mold base flange; 393. material cylinder flange. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example

[0027] See also Figures 1 to 5The utility model provides a technical solution: the core rod concentric adjustment mechanism of the extruder includes a top plate 23, a bottom plate 25 and a bottom frame 26, the center of the top plate 23 is connected to a core rod assembly, the lower end of the core rod assembly is connected to an inner mold 33, the center of the bottom plate 25 is fixed with a cylinder 34, the core rod assembly is located at the center of the cylinder 34, the lower end of the cylinder 34 is connected to a die base 31, an outer mold 32 is fixed in the die base 31, a driven gear 7 is connected to the core rod assembly, and a driving device for driving the driven gear 7 to rotate is connected to the top plate 23. When placing materials on the extruder, it is necessary to disassemble the die base 31 first to facilitate the placement of the blank from bottom to top between the cylinder 34 and the core rod assembly. The die holder 31 is then re-fixed and the die is locked. Under the influence of the blank, the core rod assembly will be offset, making the gap between the cylinder 34 and the core rod assembly unevenly distributed, which will make the wall of the extruded pipe uneven. After heating the blank, the material is softened and the core rod assembly is rotated by rotating the driving device. Under the rotational motion, the core rod assembly will return to its original position and return to the vertical direction again, so that the core rod assembly and the cylinder 34 are on the same central axis, ensuring that the gap between the cylinder 34 and the core rod assembly is the same, thereby improving the extrusion molding quality of the pipe and improving the efficiency of adjusting the coaxiality of the core rod assembly.

[0028] like Figure 1 and 5 As shown, the driving device includes a rotary rod 3 rotatably connected to the top plate 23 and a driving gear 5 fixed on the rotary rod 3. The lower end of the rotary rod 3 extends to the interior of the base frame 26. One end of the rotary rod 3 is connected to a handwheel 4, which is also located below the base frame 26. The driving gear 5 and the driven gear 7 are connected by a chain 8. By manually rotating the handwheel 4, the rotary rod 3 is rotated, and the driving gear 5 is rotated at the same time. Under the transmission action of the chain 8, the driven gear 7 and the core rod assembly are rotated. Under the rotation action, the core rod assembly is reset, thereby improving the coaxiality of the core rod assembly and the cylinder 34.

[0029] like Figure 1 As shown, the lower end of the top plate 23 is also connected to a clamping gear 6, which is located on the side of the chain 8. The clamping gear 6 applies pressure to the surface of the chain 8, thereby increasing the contact area between the chain 8 and the driving gear 5 or the driven gear 7, thereby enhancing the stability of the meshing.

[0030] Embodiment 2

[0031] In the first embodiment, the core rod assembly is integrally formed. In the present embodiment, the core rod assembly is split, and the core rod assembly includes a core rod connecting shaft 11 and a core rod body 2. The core rod body 2 is plugged into the lower end of the core rod connecting shaft 11.

[0032] A worm lift 9 is also fixed on the top plate 23. The worm 1 is connected to the internal thread of the worm lift 9. The worm lift 9 is used to control the lifting and lowering of the worm 1. The worm lift 9 includes a motor and a worm wheel. The motor controls the rotation of the worm wheel. The worm wheel meshes with the worm 1. The rotation of the worm wheel controls the up and down movement of the worm 1. The lower end of the worm 1 is against the upper surface of the core rod connecting shaft 11. The worm 1 and the core rod connecting shaft 11 are connected through a bearing seat. The core rod connecting shaft 11 is connected to the bearing seat 12 through a bearing. The worm 1 is connected to the bearing seat 12, so that the core rod connecting shaft 11 and the worm 1 can rotate separately. The up and down movement of the worm 1 will drive the core rod connecting shaft 11 to move up and down, further pushing the core rod body 2 to move downward, adjusting the distance between the inner mold 33 and the outer mold 32, and controlling the wall thickness of the extruded pipe.

[0033] like Figure 6 As shown, a rotating sleeve 10 slides on the outer surface of the core rod connecting shaft 11, and the rotating sleeve 10 is connected to the top plate 23 through a bearing. The driven gear 7 is fixed on the rotating sleeve 10. The core rod connecting shaft 11 moves up and down in the rotating sleeve 10 under the action of the worm 1, and the core rod body 2 is driven to move up and down through the core rod connecting shaft 11 to control the height of the inner mold 33 at the lower end of the core rod body 2 and adjust the gap between the inner mold 33 and the outer mold 32.

[0034] A plurality of keyways are formed on the surface of the core rod connecting shaft 11, and a plurality of grooves cooperating with the keyways are formed on the inner wall of the rotating sleeve 10. The cooperation between the grooves and the keyways enables the rotating sleeve 10 to drive the core rod connecting shaft 11 to rotate. Through the cooperation between the keyways and the grooves, the up and down movement of the core rod connecting shaft 11 can drive the rotating sleeve 10 to rotate, so that the up and down movement of the core rod connecting shaft 11 will not affect the rotation of the driven gear 7.

[0035] The utility model also provides a technical solution: an extruder, including the core rod concentricity adjustment mechanism of the extruder, through which the coaxiality of the core rod body 2 and the cylinder 34 is ensured, so that the gap between the core rod body 2 and the inner wall of the cylinder 34 is evenly distributed, thereby improving the molding quality of the extruded pipe, and further including a middle plate 24 located between the top plate 23 and the bottom plate 25, a support column 27 is connected between the top plate 23 and the bottom plate 25, the middle plate 24 moves up and down along the support column 27, and two servo electric cylinders 22 are fixed on the top plate 23. The upper ends of the two servo electric cylinders 22 are connected to the electric cylinder mounting plate 21, and the lower end of the electric cylinder mounting plate 21 is connected to the electric cylinder driving motor. The electric cylinder driving motor is located between the two servo electric cylinders 22. The telescopic end of the servo electric cylinder 22 is connected to the middle plate 24. The lower end of the middle plate 24 is connected to the push rod 28 through the push rod fixing flange 29. The push rod 28 is located between the core rod body 2 and the material cylinder 34. The servo electric cylinder 22 drives the middle plate 24 to move up and down, which further drives the push rod 28 to move up and down, thereby pushing out the material in the material cylinder 34 to realize the extrusion of the pipe.

[0036] like Figure 3 As shown, a cylinder mounting plate 35 is fixed on the material cylinder 34, and a lifting cylinder 36 is also fixed on the cylinder mounting plate 35. The telescopic end of the lifting cylinder 36 is connected to a cross plate 37, and the cross plate 37 is connected to the die base 31. The height of the die base 31 is controlled by the telescopic movement of the lifting cylinder 36. The die base 31 is moved downward by the lifting cylinder 36 to open the material cylinder 34, so that the rod-shaped blank can be placed in the material cylinder 34 conveniently. A positioning guide column 38 is also fixed on the cylinder mounting plate 35, and a circular hole is also opened on the cylinder mounting plate 35. The cross plate 37 moves up and down along the positioning guide column 38, and the up and down movement of the die base 31 is guided by the positioning guide column 38 to improve the verticality of the movement of the die base 31.

[0037] like Figure 5 As shown, a locking cylinder 39 is fixed under the cylinder mounting plate 35, and a locking module 391 is connected to the telescopic end of the locking cylinder 39. The inner wall of the locking module 391 is in an isosceles trapezoidal shape. The upper end of the mold base 31 is connected to the mold base flange 392, and the lower end of the material cylinder 34 is connected to the material cylinder flange 393. When the mold base flange 392 and the material cylinder flange 393 are fitted together, the movement of the locking module 391 clamps the mold base flange 392 and the material cylinder flange 393, and locks the mold base 31 and the material cylinder 34 together to prevent the material from flowing out from between the mold base 31 and the material cylinder 34, thereby improving the sealing.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. The core rod concentric adjustment mechanism of the extruder includes a top plate, a bottom plate and a bottom frame, and is characterized by: A core rod assembly is connected to the center of the top plate, an inner mold is connected to the lower end of the core rod assembly, a material cylinder is fixed to the center of the bottom plate, the core rod assembly is located at the center of the material cylinder, a mold base is connected to the lower end of the material cylinder, an outer mold is fixed in the mold base, a driven gear is connected to the core rod assembly, and a driving device for driving the driven gear to rotate is connected to the top plate.

2. The core rod concentricity adjustment mechanism of the extruder according to claim 1, characterized in that: The driving device comprises a rotary rod rotatably connected to the top plate and a driving gear fixed on the rotary rod, one end of the rotary rod is connected to a hand wheel, and the driving gear and the driven gear are connected through a chain.

3. The core rod concentricity adjustment mechanism of the extruder according to claim 2, characterized in that: The top plate is also connected with a clamping gear, and the clamping gear is located on the side of the chain.

4. The core rod concentricity adjustment mechanism of the extruder according to claim 1, characterized in that: The core rod assembly comprises a core rod connecting shaft and a core rod body, and the core rod body is plugged into the lower end of the core rod connecting shaft.

5. The core rod concentricity adjustment mechanism of the extruder according to claim 4, characterized in that: A worm gear lift is also fixed on the top plate, and a worm is connected to the internal thread of the worm gear lift. The lower end of the worm is against the upper surface of the core rod connecting shaft. The worm and the core rod connecting shaft are connected through a bearing seat, and the core rod connecting shaft is connected to the bearing seat through a bearing.

6. The core rod concentricity adjustment mechanism of the extruder according to claim 5, characterized in that: A rotating sleeve is arranged on the outer surface of the core rod connecting shaft, the rotating sleeve is connected to the top plate through a bearing, the driven gear is fixed on the rotating sleeve, and the core rod connecting shaft moves up and down in the rotating sleeve under the action of the worm.

7. The core rod concentricity adjustment mechanism of the extruder according to claim 6, characterized in that: A plurality of keyways are formed on the surface of the core rod connecting shaft, and a plurality of grooves cooperating with the keyways are formed on the inner wall of the rotating sleeve. The cooperation between the grooves and the keyways enables the rotating sleeve to drive the core rod connecting shaft to rotate.

8. Extruder, characterized in that: The core rod concentricity adjustment mechanism of the extruder includes any one of claims 1 to 7, and also includes a middle plate located between the top plate and the bottom plate, a servo electric cylinder is fixed on the top plate, the telescopic end of the servo electric cylinder is connected to the middle plate, and a push rod is connected to the lower end of the middle plate, and the push rod is located between the core rod assembly and the material cylinder.

9. The extruder according to claim 8, characterized in that: A cylinder mounting plate is fixed on the material cylinder, a lifting cylinder is also fixed on the cylinder mounting plate, a telescopic end of the lifting cylinder is connected with a transverse plate, and the transverse plate is connected to the mold base.

10. The extruder according to claim 9, characterized in that: A locking cylinder is fixed under the cylinder mounting plate, a locking module is connected to the telescopic end of the locking cylinder, a mold base flange is connected to the upper end of the mold base, a cylinder flange is connected to the lower end of the material cylinder, and the locking module clamps the mold base flange and the cylinder flange.

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