Traction device for plastic pipe extrusion

Abstract

The utility model relates to the technical field of pipe processing, and discloses a traction device for plastic pipe extrusion, which comprises a machine tool, an extruder and a traction mechanism, the extruder and the traction mechanism are arranged on the machine tool, the traction mechanism comprises a traction frame, an inner clamping piece and an outer clamping piece, and the inner clamping piece and the outer clamping piece are arranged on the traction frame. The inner clamping piece comprises an inner clamping base, elastic pieces and an inner driving piece, the inner clamping base is fixedly arranged on the traction frame, the elastic pieces are fixedly arranged on the inner clamping base, the elastic pieces form a cylinder, the inner driving piece is arranged in the elastic pieces, and the inner driving piece is fixedly arranged on the inner clamping base. According to the pipe clamping device, the pipe is clamped in the mode that the pipe is clamped from inside to outside, and the problem of pipe clamping deformation can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing technology, and in particular to a traction device for extruding plastic pipes. Background Technology

[0002] The requirements for the traction device in a pipe extruder are that it can uniformly draw out the pipe, and that the pipe diameter and wall thickness can be adjusted by changing the traction rate during the traction process. The stability of the traction device directly affects the uniformity of the pipe diameter and wall thickness. A suitable traction device must be selected during pipe forming. Plastic molding equipment was developed based on rubber machinery and metal die-casting machines. Plastic molding equipment has gradually become commercialized. Injection molding and extrusion molding have become industrialized processing methods. Blow molding is the third largest plastic molding method after injection molding and extrusion, and it is also the fastest-growing plastic molding method. The forming of long pipes requires traction. During the traction process, because the pipe is hollow, relying solely on external clamping and traction can easily lead to compression deformation. Utility Model Content

[0003] The purpose of this invention is to provide a traction device for extruding plastic pipes, which has the effect of preventing pipe deformation during clamping.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a traction device for extruding plastic pipes, comprising a machine tool, an extruder and a traction mechanism disposed on the machine tool, the traction mechanism comprising a traction frame, an inner clamping member and an outer clamping member disposed on the traction frame, the inner clamping member comprising an inner clamping base, spring pieces and an inner driving member, the inner clamping base being fixedly disposed on the traction frame, a plurality of spring pieces being fixedly disposed on the inner clamping base, the plurality of spring pieces forming a cylindrical shape, the inner driving member being disposed inside the plurality of spring pieces, the inner driving member controlling the unfolding of the plurality of spring pieces.

[0005] By adopting the above technical solution, this utility model can achieve synchronous internal and external clamping of plastic pipes, which can avoid deformation of plastic pipes. First, the inner clamping component of the traction mechanism expands and clamps the inner wall of the pipe, and then the outer clamping component clamps the outer wall of the pipe. The pipe is clamped in the manner of first inside and then outside, which can avoid the problem of pipe deformation during clamping.

[0006] A further feature of this invention is that the internal driving component includes a threaded rod and an unfolding head. The threaded rod is threadedly connected to the internal clamping base, the unfolding head is disposed at the end of the threaded rod, the inner walls of a plurality of spring pieces are in contact with the unfolding head, and a handwheel is disposed at the end of the threaded rod.

[0007] A further feature of this invention is that the diameter of the unfolding head gradually decreases from the end furthest from the threaded rod to the end closest to the threaded rod.

[0008] By adopting the above technical solution, rotating the handwheel causes the threaded rod to retract, which in turn drives the unfolding head to move. The diameter of the end of the unfolding head is relatively large, and the unfolding head expands several spring pieces, so that the spring pieces fit against the inner wall of the pipe, thereby achieving internal clamping of the pipe.

[0009] A further feature of this invention is that the external clamping member includes a chassis, a rotating disk, a guide disk, a clamping arm, and an external driving member. The chassis is mounted on the traction frame, the rotating disk is rotatably mounted inside the chassis, the guide disk is fixedly mounted on the chassis, the clamping arm is slidably mounted on the guide disk, the clamping arm is connected to the rotating disk, and the external driving member drives the rotating disk to move the clamping arm in a centripetal motion.

[0010] A further feature of this invention is that the external driving component includes a drive motor, a drive rod, and a drive bevel gear. The drive rod is fixedly disposed at the output end of the drive motor, and the drive bevel gear is coaxially disposed at the end of the drive rod. The drive rod is rotatably connected to the chassis. A bevel tooth is provided on the side of the rotating disk near the chassis, and the drive bevel gear meshes with the bevel tooth.

[0011] A further feature of this invention is that: an annular groove is provided on the side of the rotating disk near the guide disk, and sliding teeth are provided on the clamping arm, the sliding teeth being slidably engaged in the annular groove.

[0012] A further feature of this invention is that a guide rod and a guide bevel gear are provided on the chassis, the guide rod is rotatably connected to the chassis, and the guide bevel gear meshes with the conical teeth on the chassis.

[0013] A further feature of this invention is that the guide plate is provided with a guide groove, and the clamping arm is slidably connected within the guide groove.

[0014] By adopting the above technical solution, the drive motor drives the drive rod to drive the drive bevel gear to rotate. The drive bevel gear meshes with the bevel teeth, driving the rotating disk to rotate. The other side of the rotating disk is provided with a spiral annular groove. The clamping arm meshes with it through sliding teeth. During the rotation of the rotating disk, the three clamping arms will move towards the center to clamp the outside of the pipe.

[0015] A further feature of this invention is that the machine tool is provided with a control component, which includes a control motor, a lead screw, and a guide groove. The lead screw is rotatably connected to the machine tool, the control motor is located on the machine tool and its output end is fixedly connected to the lead screw, the traction frame is threadedly connected to the lead screw, the guide groove is located on the machine tool, and the traction frame is slidably connected to the guide groove.

[0016] The beneficial effects of this utility model are: This utility model can realize the synchronous clamping of plastic pipes inside and outside, and can avoid the deformation of plastic pipes. First, the inner clamping part of the traction mechanism expands and clamps the inner wall of the pipe, and then the outer clamping part clamps the outer wall of the pipe. The pipe is clamped in the manner of first inside and then outside, which can avoid the problem of pipe deformation during clamping. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the main structure of the traction mechanism of this utility model.

[0020] Figure 3 This is a schematic diagram of the traction mechanism of this utility model.

[0021] Figure 4 This is a schematic diagram of the internal clamping component structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the explosion mechanism of the internal clamping component of this utility model.

[0023] Figure 6 This is a schematic diagram of the exploded structure of the external clamping component of this utility model.

[0024] In the diagram, 1. Machine tool; 11. Control motor; 12. Lead screw; 13. Guide groove; 2. Extruder; 3. Traction mechanism; 31. Traction frame; 4. Inner clamping component; 41. Inner clamping base; 42. Spring; 43. Threaded rod; 44. Unfolding head; 5. Outer clamping component; 51. Chassis; 511. Guide rod; 512. Guide bevel gear; 52. Rotating disk; 521. Conical tooth; 522. Annular slide groove; 53. Guide disk; 531. Guide slide groove; 54. Clamping arm; 541. Sliding tooth; 55. Drive motor; 56. Drive rod; 57. Drive bevel gear. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] Examples, such as Figure 1 , Figure 2 Figure 3 As shown, a traction device for extruding plastic pipes includes a machine tool 1, an extruder 2 mounted on the machine tool 1, and a traction mechanism 3. The traction mechanism 3 includes a traction frame 31, an inner clamping member 4 and an outer clamping member 5 mounted on the traction frame 31. The inner clamping member 4 includes an inner clamping base 41, spring pieces 42, and an inner driving member. The inner clamping base 41 is fixedly mounted on the traction frame 31. A plurality of spring pieces 42 are fixedly mounted on the inner clamping base 41, and the plurality of spring pieces 42 are cylindrical. The inner driving member is disposed inside the plurality of spring pieces 42 and controls the unfolding of the plurality of spring pieces 42.

[0027] This invention enables simultaneous internal and external clamping of plastic pipes, preventing deformation of the plastic pipes. First, the inner clamping member 4 of the traction mechanism 3 expands and clamps the inner wall of the pipe, and then the outer clamping member 5 clamps the outer wall of the pipe. The pipe is clamped in an internal-to-external manner, which can avoid the problem of pipe deformation during clamping.

[0028] like Figure 4 , Figure 5 As shown, the internal drive component includes a threaded rod 43 and an unfolding head 44. The threaded rod 43 is threadedly connected to the inner clamping base 41, and the unfolding head 44 is disposed at the end of the threaded rod 43. The inner walls of a plurality of spring pieces 42 are in contact with the unfolding head 44, and a handwheel is disposed at the end of the threaded rod 43.

[0029] like Figure 5As shown, the diameter of the unfolding head 44 gradually decreases from the end away from the threaded rod 43 to the end closer to the threaded rod 43.

[0030] Turn the handwheel to retract the threaded rod 43, which in turn drives the unfolding head 44 to move. The end of the unfolding head 44 has a larger diameter, and the unfolding head 44 expands several spring pieces 42, so that the spring pieces 42 fit against the inner wall of the pipe, thereby achieving internal clamping of the pipe.

[0031] like Figure 6 As shown, the external clamping member 5 includes a chassis 51, a rotating disk 52, a guide disk 53, a clamping arm 54, and an external driving member. The chassis 51 is mounted on the traction frame 31, the rotating disk 52 is rotatably mounted inside the chassis 51, the guide disk 53 is fixedly mounted on the chassis 51, and the clamping arm 54 is slidably mounted on the guide disk 53. The clamping arm 54 is connected to the rotating disk 52, and the external driving member drives the rotating disk 52 to drive the clamping arm 54 to move centripetally.

[0032] like Figure 6 As shown, the external driving component includes a drive motor 55, a drive rod 56, and a drive bevel gear 57. The drive rod 56 is fixedly disposed at the output end of the drive motor 55, and the drive bevel gear 57 is coaxially disposed at the end of the drive rod 56. The drive rod 56 is rotatably connected to the chassis 51. The rotating disk 52 is provided with a bevel tooth 521 on the side near the chassis 51, and the drive bevel gear 57 meshes with the bevel tooth 521.

[0033] like Figure 6 As shown, the rotating disk 52 is provided with an annular groove 522 on the side near the guide disk 53, and the clamping arm 54 is provided with sliding teeth 541, which are slidably engaged in the annular groove 522.

[0034] like Figure 6 As shown, the chassis 51 is provided with a guide rod 511 and a guide bevel gear 512. The guide rod 511 is rotatably connected to the chassis 51, and the guide bevel gear 512 meshes with the bevel teeth 521 on the chassis 51.

[0035] like Figure 6 As shown, the guide plate 53 is provided with a guide groove 531, and the clamping arm 54 is slidably connected in the guide groove 531.

[0036] The drive motor 55 drives the drive rod 56 to drive the drive bevel gear 57 to rotate. The drive bevel gear 57 meshes with the bevel teeth 521, which drives the rotating disk 52 to rotate. The other side of the rotating disk 52 is provided with a spiral annular groove 522. The clamping arm 54 meshes with it through the sliding teeth 541. During the rotation of the rotating disk 52, the three clamping arms 54 will move towards the center to clamp the outside of the pipe.

[0037] like Figure 1 As shown, the machine tool 1 is equipped with a control component, which includes a control motor 11, a lead screw 12, and a guide groove 13. The lead screw 12 is rotatably connected to the machine tool 1. The control motor 11 is mounted on the machine tool 1, and its output end is fixedly connected to the lead screw 12. The traction frame 31 is threadedly connected to the lead screw 12. The guide groove 13 is mounted on the machine tool 1, and the traction frame 31 is slidably connected to the guide groove 13.

[0038] This invention enables simultaneous internal and external clamping of plastic pipes, preventing deformation of the plastic pipes. First, the inner clamping member 4 of the traction mechanism 3 expands and clamps the inner wall of the pipe, and then the outer clamping member 5 clamps the outer wall of the pipe. The pipe is clamped in an internal-to-external manner, which can avoid the problem of pipe deformation during clamping.

Claims

1. A traction device for extruding plastic pipes, characterized in that: The device includes a machine tool (1), an extruder (2) mounted on the machine tool (1), and a traction mechanism (3). The traction mechanism (3) includes a traction frame (31), an inner clamping member (4) and an outer clamping member (5) mounted on the traction frame (31). The inner clamping member (4) includes an inner clamping base (41), spring pieces (42), and an inner driving member. The inner clamping base (41) is fixedly mounted on the traction frame (31). A plurality of spring pieces (42) are fixedly mounted on the inner clamping base (41). The plurality of spring pieces (42) form a cylindrical shape. The inner driving member is disposed inside the plurality of spring pieces (42) and controls the unfolding of the plurality of spring pieces (42).

2. The traction device for extruding plastic pipes according to claim 1, characterized in that: The internal drive component includes a threaded rod (43) and an unfolding head (44). The threaded rod (43) is threadedly connected to the internal clamping base (41), and the unfolding head (44) is disposed at the end of the threaded rod (43). The inner walls of a plurality of spring pieces (42) are in contact with the unfolding head (44).

3. The traction device for extruding plastic pipes according to claim 2, characterized in that: The diameter of the unfolding head (44) gradually decreases from the end away from the threaded rod (43) to the end closer to the threaded rod (43).

4. The traction device for extruding plastic pipes according to claim 1, characterized in that: The external clamping member (5) includes a chassis (51), a rotating disk (52), a guide disk (53), a clamping arm (54), and an external driving member. The chassis (51) is mounted on the traction frame (31). The rotating disk (52) is rotatably mounted inside the chassis (51). The guide disk (53) is fixedly mounted on the chassis (51). The clamping arm (54) is slidably mounted on the guide disk (53). The clamping arm (54) is connected to the rotating disk (52). The external driving member drives the rotating disk (52) to drive the clamping arm (54) to move centripetally.

5. A traction device for extruding plastic pipes according to claim 4, characterized in that: The external driving component includes a drive motor (55), a drive rod (56), and a drive bevel gear (57). The drive rod (56) is fixedly mounted on the output end of the drive motor (55). The drive bevel gear (57) is coaxially mounted on the end of the drive rod (56). The drive rod (56) is rotatably connected to the chassis (51). The rotating disk (52) has a bevel tooth (521) on the side near the chassis (51). The drive bevel gear (57) meshes with the bevel tooth (521).

6. A traction device for extruding plastic pipes according to claim 4, characterized in that: The rotating disk (52) has an annular groove (522) on the side near the guide disk (53), and the clamping arm (54) has a sliding tooth (541) that slides and engages in the annular groove (522).

7. A traction device for extruding plastic pipes according to claim 5, characterized in that: The chassis (51) is provided with a guide rod (511) and a guide bevel gear (512). The guide rod (511) is rotatably connected to the chassis (51), and the guide bevel gear (512) meshes with the bevel teeth (521) on the chassis (51).

8. A traction device for extruding plastic pipes according to claim 7, characterized in that: The guide plate (53) is provided with a guide groove (531), and the clamping arm (54) is slidably connected in the guide groove (531).

9. A traction device for extruding plastic pipes according to claim 1, characterized in that: The machine tool (1) is equipped with a control component, which includes a control motor (11), a lead screw (12), and a guide groove (13). The lead screw (12) is rotatably connected to the machine tool (1). The control motor (11) is mounted on the machine tool (1) and its output end is fixedly connected to the lead screw (12). The traction frame (31) is threadedly connected to the lead screw (12). The guide groove (13) is mounted on the machine tool (1) and the traction frame (31) is slidably connected to the guide groove (13).

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