Injection molding pipe material shaping tool

Abstract

The application discloses an injection pipe material shaping tool, and relates to the field of injection pipe material processing.The injection pipe material shaping tool comprises an outer shaping device and an inner shaping device.The outer shaping device comprises a mounting seat, a driving mechanism and a plurality of claw mechanisms.The driving mechanism is used for driving the plurality of claw mechanisms to reciprocate along a radial guide hole.An outer support plate is arranged at the upper part of each claw mechanism, and the plurality of outer support plates are used for supporting and shaping the outside of the injection pipe material.The inner shaping device comprises a bottom connecting piece, a center positioning pin, a center shaft, an outer cylinder, a driving part and an inner support mechanism.The inner support mechanism comprises a mounting block, an inner support plate and a transmission assembly.The driving part can drive an inner support plate to reciprocate along a radial guide groove through each transmission assembly, and the plurality of inner support plates are used for supporting and shaping the inside of the injection pipe material.The injection pipe material shaping tool can be applied to injection pipe materials with different pipe diameters, and the raw material cost, the processing cost and the management cost are reduced, and the shaping effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of injection molding pipe material processing, in particular to an injection molding pipe material shaping tool. BACKGROUND

[0002] The internal stress of plastic refers to an internal stress generated in the process of plastic melting and processing due to the influence of factors such as molecular chain orientation and cooling shrinkage. Almost all plastic products will have internal stress to varying degrees, especially the internal stress of plastic injection products is more obvious. The existence of internal stress causes stress cracking and warping deformation of plastic injection products during storage and use. The warping deformation of the product gives the customer a bad first impression, thereby subjectively losing confidence in the product. In addition, it also affects the assembly and dimensional accuracy of the product, making assembly more difficult, causing local stress on the product, and overcoming deformation or making the product protrude in the groove to intensify wear, reducing the durability of the plastic injection product. When the internal stress exceeds the bearing capacity of the material, the product may have quality problems in a short period of time, which will shorten the service life of the product and increase the maintenance cost. Therefore, the internal stress of the product needs to be reduced to the minimum before assembly.

[0003] In the field of sealing products, the guide element is generally made of engineering plastic by injection molding. Its main function is to support and position the piston and piston rod, preventing them from directly contacting and rubbing in the cylinder, thereby protecting the cylinder and piston rod from damage. The guide ring separates the piston and cylinder, piston rod and guide sleeve through radial support and movement positioning, effectively preventing direct scraping, wear and tear between the moving pairs, playing a key role in hydraulic or pneumatic cylinders, and is one of the core components of the oil cylinder.

[0004] The guide ring is generally made of polyformaldehyde, reinforced and modified polyformaldehyde, nylon, and reinforced and modified nylon by injection molding. The product needs to be opened according to customer requirements. The main purpose of the opening design is to achieve unobstructed movement of the guide ring in the hydraulic cylinder, so that the oil cylinder piston can quickly reach the predetermined speed, significantly improving the working efficiency and stability of the entire hydraulic system. First, it enhances the stability of the hydraulic system by ensuring unobstructed flow of hydraulic oil, effectively reducing noise and vibration during operation. Second, this design helps to reduce the wear of the hydraulic cylinder, making the oil flow more stable, thereby prolonging the service life of the cylinder. Finally, the opening of the guide ring also shortens the response time of the hydraulic system, allowing the piston to quickly reach the designated position, improving the response speed and accuracy of the system. However, if the product is molded with internal stress, the internal stress will be released at the opening after the opening process, causing the product to twist and deform.

[0005] The guide ring is assembled in the corresponding groove of the piston and the guide sleeve, because of different assembly positions and effects, and in order to facilitate workers to assemble, the piston rod guide ring is preferably in an outwardly expanded state, and the piston guide ring is preferably in an inwardly buckled state, so that the labor intensity of work can be greatly reduced. Excellent appearance and specific state need to be realized by using specific shaping process and tooling.

[0006] Generally, the method for eliminating the internal force of the product is high-temperature baking treatment, solvent (water, oil, etc.), infrared, microwave treatment, etc. According to the product structure, the material internal stress is released and the molecular structure is rearranged by treatment at a certain temperature for a certain time, thereby ensuring the dimensional stability of the product. No matter which stress removal method is used, it must be ensured that the material performance will not be negatively affected.

[0007] At present, the shaping method commonly used in the industry is that small-size guide rings are directly placed in an oven for aging treatment, and large-size guide rings need to be matched and shaped according to the size by developing specific size one-to-one corresponding tooling, and only the inner wall of the guide ring can be shaped in one direction. This requires the development of numerous types of shaping tooling, which not only increases the raw material cost, processing cost, but also increases the management cost, which hinders the development of enterprises. SUMMARY

[0008] To solve the above technical problems, the present application provides an injection pipe material shaping tooling, which can be applied to injection pipe materials of different pipe diameters, reduces the raw material cost, processing cost and management cost, and improves the shaping effect.

[0009] To achieve the above object, the present application provides the following scheme:

[0010] The application provides a kind of injection pipe material shaping tool, comprising outer shaping device and inner shaping device, the outer shaping device includes mounting seat, driving mechanism and multiple claw mechanisms, multiple radial guide holes are sequentially arranged on the upper part of the mounting seat in the circumferential direction, the lower part of each claw mechanism is slidably installed in a radial guide hole, the driving mechanism is arranged on the mounting seat, and is used to drive multiple claw mechanisms to reciprocate along the radial guide hole, the upper part of each claw mechanism is provided with an outer support plate, and multiple outer support plates are used to support and shape the outside of injection pipe material;The inner shaping device is arranged on the inner side of multiple outer support plates, and the inner shaping device comprises a bottom connecting piece, a center positioning pin, a center shaft, an outer cylinder, a driving part and an inner support mechanism, the bottom connecting piece can be fixed at the center of the upper part of the mounting seat, the center positioning pin is fixed on the bottom connecting piece and extends above it, the lower end of the center shaft is rotatably installed on the center positioning pin, the outer cylinder is sleeved on the outside of the center shaft and is fixed on the bottom connecting piece, the driving part is fixedly sleeved on the center shaft, the inner support mechanism comprises multiple inner support assemblies arranged sequentially along the circumference of the outer cylinder, the inner support assembly comprises a mounting block, an inner support plate and a transmission assembly, the mounting block is fixed on the outside of the outer cylinder, a radial guide groove is arranged on the mounting block, one end of the inner support plate is slidably installed in the radial guide groove, the driving part can drive one inner support plate to reciprocate along the radial guide groove through each transmission assembly, and multiple inner support plates are used to support and shape the inside of injection pipe material.

[0011] Preferably, it also comprises an upper cover plate, an inner locking mechanism and an outer locking mechanism, the upper cover plate is arranged above multiple outer support plates and is sleeved on the center shaft, the inner locking mechanism is used to lock the center shaft on the upper cover plate, and the outer locking mechanism is used to lock multiple outer support plates on the upper cover plate.

[0012] Preferably, the upper cover plate comprises a center plate, an outer ring and multiple radial strip plates, the inner and outer ends of each radial strip plate are connected with the outer side of the center plate and the inner side of the outer ring respectively, each radial strip plate is located on the upper part of one outer support plate, the outer locking mechanism is used to lock each radial strip plate on one outer support plate, the center plate is sleeved on the center shaft, and the inner locking mechanism is used to lock the center shaft on the center plate.

[0013] Preferably, the inner locking mechanism comprises a locking nut and a gasket, the outer sidewall of the upper end of the central shaft is provided with external threads, the gasket is sleeved on the central shaft and located at the upper portion of the central plate, and the locking nut is installed on the upper end of the central shaft and located at the upper portion of the gasket, so as to make the gasket abut against the central plate.

[0014] Preferably, the outer locking mechanism comprises a plurality of locking bolts, each of the radial strip-shaped plates is provided with a radial strip-shaped hole, the upper end of each of the outer support plates is provided with a threaded hole, and each of the locking bolts is used for penetrating through a radial strip-shaped hole and being installed in a threaded hole.

[0015] Preferably, the driving mechanism comprises a rotating disc, a bottom bevel gear, a helical rack and a plurality of driving bevel gears, the rotating disc is rotationally installed in the mounting seat, the lower surface of the rotating disc is provided with the bottom bevel gear, a plurality of the driving bevel gears are sequentially arranged on the mounting seat in a circumferential direction, and extend to the inside of the mounting seat and are engaged with the bottom bevel gear, the upper surface of the rotating disc is provided with the helical rack, the claw mechanism comprises a claw body, the bottom of the claw body is provided with a plurality of engagement teeth matched with the helical rack, and the lower end of the outer support plate is fixed on the claw body.

[0016] Preferably, the claw body comprises a horizontal block and a vertical block arranged on the upper portion of the outer side of the horizontal block, the engagement teeth are arranged on the bottom of the horizontal block, the opposite sidewalls of the radial guide hole are provided with radial rails, the two sides of the horizontal block are provided with radial grooves for slidingly being installed on the radial rails, and the lower portion of the outer support plate is fixed to the upper portion of the horizontal block and the inner side of the vertical block.

[0017] Preferably, the mounting seat comprises a base, a bottom plate and a plurality of fixing bolts, the base comprises a mounting plate, a first cylinder and a second cylinder, a plurality of the radial guide holes are sequentially arranged on the mounting plate in a circumferential direction, the bottom connecting piece can be fixed at the center of the upper portion of the mounting plate, the first cylinder and the second cylinder are arranged at the bottom of the mounting plate, the first cylinder is gap-sleeved on the outside of the second cylinder, the upper portion of the bottom plate is provided with a third cylinder, the third cylinder is gap-sleeved on the outside of the second cylinder and is in close contact with the second cylinder, the bottom plate is fixed to the bottom of the second cylinder through a plurality of the fixing bolts, the rotating disc is gap-sleeved on the outside of the second cylinder and located above the third cylinder, a plurality of mounting holes are sequentially arranged on the sidewall of the first cylinder in a circumferential direction, a plurality of mounting openings are sequentially arranged on the sidewall of the third cylinder in a circumferential direction, and a plurality of mounting slots are sequentially arranged on the outer sidewall of the second cylinder in a circumferential direction, and each of the driving bevel gears sequentially penetrates through a mounting hole, a mounting opening and is rotationally installed in a mounting slot.

[0018] Preferably, the driving component is a hollow worm, the hollow worm is fixedly sleeved on the central shaft, the transmission assembly comprises a gear and a rack, the gear is rotationally installed on the mounting block and is engaged with the hollow worm, one end of the inner support plate is provided with a horizontal sliding plate, the horizontal sliding plate is slidingly installed in the radial guide groove, and the rack is arranged on the horizontal sliding plate and is engaged with the gear.

[0019] Preferably, the hollow worm and the inner support mechanism are both provided as two, the hollow worm corresponds to the inner support mechanism one by one, and each hollow worm is used for driving a plurality of gears in one inner support mechanism; one hollow worm is fixedly sleeved on the upper portion of the central shaft and located above the outer cylinder, a plurality of mounting blocks of one inner support mechanism are sequentially fixed to the upper portion of the outer side of the outer cylinder in a circumferential direction, the upper portion of each mounting block is provided with a radial guide groove, the upper portion of each mounting block is rotationally installed with a gear, and each rack is arranged on the upper portion of the horizontal sliding plate; another hollow worm is fixedly sleeved on the lower portion of the central shaft and located below the outer cylinder, a plurality of mounting blocks of another inner support mechanism are sequentially fixed to the lower portion of the outer side of the outer cylinder in a circumferential direction, the lower portion of each mounting block is provided with a radial guide groove, the lower portion of each mounting block is rotationally installed with a gear, each rack is arranged on the lower portion of the horizontal sliding plate, and each mounting block is fixedly connected with the bottom connecting piece through two connecting rods.

[0020] The present application has the following technical effects relative to the prior art:

[0021] The injection pipe material shaping tool comprises an outer shaping device and an inner shaping device, the outer shaping device comprises a mounting seat, a driving mechanism and a plurality of claw mechanisms, the driving mechanism is used for driving the plurality of claw mechanisms to reciprocate along the radial guide hole, the upper portion of each claw mechanism is provided with an outer support plate, and the plurality of outer support plates are used for supporting and shaping the outside of the injection pipe material; the inner shaping device comprises a bottom connecting piece, a central positioning pin, a central shaft, an outer cylinder, a driving component and an inner support mechanism, the inner support mechanism comprises a plurality of inner support assemblies arranged in a circumferential direction of the outer cylinder, the inner support assembly comprises a mounting block, an inner support plate and a transmission assembly, the driving component can drive one inner support plate to reciprocate along the radial guide groove through each transmission assembly, and the plurality of inner support plates are used for supporting and shaping the inside of the injection pipe material. The outer shaping device and the inner shaping device can realize bidirectional shaping of the inner wall and the outer wall of the injection pipe material at the same time, thereby improving the shaping effect. Meanwhile, the outer shaping device and the inner shaping device can be adjusted, thereby being applicable to injection pipe materials with different pipe diameters, greatly reducing the number of required tools, and reducing raw material cost, processing cost and management cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A structure schematic diagram of the injection pipe material shaping tooling provided by the present application is shown in the figure.

[0024] Figure 2 A structure schematic diagram of the injection pipe material shaping tooling provided by the present application is shown in the figure.

[0025] Figure 3 A top view of the injection pipe material shaping tooling provided by the present application is shown in the figure.

[0026] Figure 4 A structure schematic diagram of the injection pipe material shaping tooling provided by the present application is shown in the figure. Figure 3 A sectional view of the injection pipe material shaping tooling provided by the present application is shown in the figure.

[0027] Figure 5 A structure schematic diagram of the injection pipe material shaping tooling provided by the present application is shown in the figure.

[0028] Figure 6 A first structure schematic diagram of the inner shaping device and the inner locking mechanism in the injection pipe material shaping tooling provided by the present application is shown in the figure.

[0029] Figure 7 A second structure schematic diagram of the inner shaping device and the inner locking mechanism in the injection pipe material shaping tooling provided by the present application is shown in the figure.

[0030] Figure 8 A third structure schematic diagram of the inner shaping device and the inner locking mechanism in the injection pipe material shaping tooling provided by the present application is shown in the figure.

[0031] Figure 9 A structure schematic diagram of the outer shaping device in the injection pipe material shaping tooling provided by the present application is shown in the figure.

[0032] Figure 10 A structure schematic diagram of the clamping claw mechanism in the injection pipe material shaping tooling provided by the present application is shown in the figure.

[0033] Figure 11 A first structure schematic diagram of the mounting seat and the driving mechanism in the injection pipe material shaping tooling provided by the present application is shown in the figure.

[0034] Figure 12 A second structure schematic diagram of the mounting seat and the driving mechanism in the injection pipe material shaping tooling provided by the present application is shown in the figure.

[0035] Figure 13 The structural schematic diagram of the bottom plate, the third cylinder and the driving mechanism in the injection pipe material shaping tool provided by the present application is shown in the figure;

[0036] Figure 14 The structural schematic diagram of the base in the injection pipe material shaping tool provided by the present application is shown in the figure;

[0037] Figure 15 The structural schematic diagram of the bottom plate and the third cylinder in the injection pipe material shaping tool provided by the present application is shown in the figure;

[0038] Figure 16 The first structural schematic diagram of the rotating disc in the injection pipe material shaping tool provided by the present application is shown in the figure;

[0039] Figure 17 The second structural schematic diagram of the rotating disc in the injection pipe material shaping tool provided by the present application is shown in the figure.

[0040] The figure legend is as follows: 100, injection pipe material shaping tool; 1, mounting plate; 2, first cylinder; 3, second cylinder; 4, positioning groove; 5, radial guide hole; 6, radial guide rail; 7, mounting hole; 8, mounting groove; 9, bottom plate; 10, third cylinder; 11, mounting port; 12, fixing bolt; 13, rotating disc; 14, helical rack; 15, bottom bevel gear; 16, driving bevel gear; 17, square groove; 18, horizontal block; 19, radial groove; 20, meshing tooth; 21, vertical block; 22, outer support plate; 23, bottom connecting piece; 24, center positioning pin; 25, center shaft; 26, hollow worm; 27, outer cylinder; 28, mounting block; 29, gear; 30, rack; 31, horizontal sliding plate; 32, inner support plate; 33, connecting rod; 34, gasket; 35, locking nut; 36, center plate; 37, outer ring; 38, radial strip plate; 39, radial strip hole; 40, locking bolt; 41, threaded hole; 42, injection pipe material. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0042] The purpose of the present application is to provide an injection pipe material shaping tool, which can be applied to injection pipe materials with different diameters, reduces raw material cost, processing cost and management cost, and improves shaping effect.

[0043] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0044] As shown in Figures 1-17 The present embodiment provides an injection pipe material shaping tool 100, which comprises an outer shaping device and an inner shaping device. The outer shaping device comprises a mounting seat, a driving mechanism and a plurality of claw mechanisms. A plurality of radial guide holes 5 are sequentially arranged on the upper part of the mounting seat in the circumferential direction. The lower part of each claw mechanism is slidingly installed in one radial guide hole 5. The driving mechanism is arranged on the mounting seat and is used to drive the plurality of claw mechanisms to reciprocate along the radial guide hole 5. The upper part of each claw mechanism is provided with an outer support plate 22, and the plurality of outer support plates 22 are used to support and shape the outer part of the injection pipe material 42. The inner shaping device is arranged on the inner side of the plurality of outer support plates 22. The inner shaping device comprises a bottom connecting piece 23, a center positioning pin 24, a center shaft 25, an outer cylinder 27, a driving component and an inner support mechanism. The bottom connecting piece 23 can be fixed at the center of the upper part of the mounting seat. The center positioning pin 24 is fixed on the bottom connecting piece 23 and extends above it. The lower end of the center shaft 25 is rotatably installed on the center positioning pin 24. The outer cylinder 27 is sleeved on the outer part of the center shaft 25 and is fixed on the bottom connecting piece 23. The center axes of the outer cylinder 27 and the center shaft 25 are arranged in line. The driving component is fixedly sleeved on the center shaft 25. The inner support mechanism comprises a plurality of inner support assemblies which are sequentially arranged on the outer cylinder 27 in the circumferential direction. The inner support assembly comprises a mounting block 28, an inner support plate 32 and a transmission assembly. The mounting block 28 is fixed on the outer part of the outer cylinder 27. The mounting block 28 is provided with a radial guide groove. One end of the inner support plate 32 is slidingly installed in the radial guide groove. The driving component can drive one inner support plate 32 to reciprocate along the radial guide groove through each transmission assembly. The plurality of inner support plates 32 are used to support and shape the inner part of the injection pipe material 42.

[0045] In the present embodiment, the outer shaping device and the inner shaping device can simultaneously realize the bidirectional shaping of the inner and outer walls of the injection pipe material 42, so as to have higher size control precision and improve the shaping effect. Meanwhile, the outer shaping device and the inner shaping device can be adjusted, so as to be applicable to injection pipe materials 42 of different pipe diameters, greatly reducing the number of required tools and reducing the raw material cost, processing cost and management cost.

[0046] Specifically, the maximum adjustment pipe diameter of the shaping tool can be designed into four types, i.e. pipe diameter below 200 mm, pipe diameter of 200-400 mm, pipe diameter of 400-600 mm and pipe diameter above 600 mm. The injection pipe materials 42 within the pipe diameter range can be shaped by using the same set of shaping tools, improving the universality.

[0047] The shaping tool in the embodiment can simultaneously shape the open and unopened injection molded pipe material 42, and can simultaneously shape the inner buckle and outer expansion of the open part. Meanwhile, the shaping tool is light in weight and convenient to operate, and a general technician can work after training.

[0048] As shown in Figure 1 , the embodiment further includes an upper cover plate, an inner locking mechanism and an outer locking mechanism. The upper cover plate is arranged above the plurality of outer support plates 22 and is sleeved on the central shaft 25. The inner locking mechanism is used to lock the central shaft 25 on the upper cover plate. The outer locking mechanism is used to lock the plurality of outer support plates 22 on the upper cover plate. After adjusting the outer shaping device and the inner shaping device according to the size of the injection molded pipe material 42, the central shaft 25 and the outer support plates 22 are locked by the cooperation of the upper cover plate, the inner locking mechanism and the outer locking mechanism, so that the shaping tool shapes the injection molded pipe material 42 in a more stable state.

[0049] As shown in Figure 5 , the upper cover plate includes a central plate 36, an outer ring 37 and a plurality of radial strip plates 38. The inner and outer ends of each radial strip plate 38 are respectively connected to the outer side of the central plate 36 and the inner side of the outer ring 37. Each radial strip plate 38 is located on the upper part of one outer support plate 22. The outer locking mechanism is used to lock each radial strip plate 38 on one outer support plate 22. The central plate 36 is sleeved on the central shaft 25. The inner locking mechanism is used to lock the central shaft 25 on the central plate 36.

[0050] The inner locking mechanism includes a locking nut 35 and a gasket 34. The outer side wall of the upper end of the central shaft 25 is provided with external threads. The gasket 34 is sleeved on the central shaft 25 and located on the upper part of the central plate 36. The locking nut 35 is installed on the upper end of the central shaft 25 and located on the upper part of the gasket 34. The locking nut 35 is used to make the gasket 34 abut against the central plate 36, thereby being able to lock the central shaft 25 on the central plate 36, so that the inner shaping device can be locked and fixed with the upper cover plate after being adjusted.

[0051] The outer locking mechanism includes a plurality of locking bolts 40. Each radial strip plate 38 is provided with a radial strip hole 39. The upper end of each outer support plate 22 is provided with a threaded hole 41. Each locking bolt 40 is used to pass through one radial strip hole 39 and is installed in one threaded hole 41, thereby being able to lock each outer support plate 22 on one radial strip plate 38, so that the outer shaping device can be locked and fixed with the upper cover plate after being adjusted.

[0052] As shown in Figure 4 and Figure 13As shown, the driving mechanism comprises a rotating disc 13, a bottom bevel gear 15, a helical rack 14 and a plurality of driving bevel gears 16. The rotating disc 13 is rotatably installed in a mounting seat. The bottom bevel gear 15 is arranged on the lower surface of the rotating disc 13. The center axes of the bottom bevel gear 15, the rotating disc 13 and the central shaft 25 are arranged in a same line. The plurality of driving bevel gears 16 are sequentially arranged on the mounting seat in a circumferential direction, extend to the inside of the mounting seat and are engaged with the bottom bevel gear 15. The center axes of the plurality of driving bevel gears 16 are coplanarly arranged. The center axes of the driving bevel gears 16 are all perpendicular to the center axis of the bottom bevel gear 15. The helical rack 14 is arranged on the upper surface of the rotating disc 13. The claw mechanism comprises a claw body. The claw body is provided with a plurality of engagement teeth 20 at the bottom thereof, which are matched with the helical rack 14. The lower end of the outer support plate 22 is fixed to the claw body.

[0053] In use, by rotating one of the driving bevel gears 16, the bottom bevel gear 15 and the rotating disc 13 can be rotated, and then the helical rack 14 on the upper portion of the rotating disc 13 is rotated. Under the matching structure of the engagement teeth 20, the claw body is reciprocated along the radial guide hole 5, and the outer support plate 22 is reciprocated along the radial guide hole 5, and then the outer sizing device is adjusted according to the injection tube material 42 with different diameters.

[0054] As shown in the figure, Figure 10 The claw body comprises a horizontal block 18 and a vertical block 21 arranged on the upper portion of the outer side of the horizontal block 18. The engagement teeth 20 are arranged at the bottom of the horizontal block 18. The radial guide hole 5 is provided with radial guide rails 6 on the opposite two side walls. The two sides of the horizontal block 18 are provided with radial grooves 19 for slidingly being installed on the radial guide rails 6, so that the claw body moves along the radial guide hole 5 more stably. The lower portion of the outer support plate 22 is fixed to the upper portion of the horizontal block 18 and the inner side of the vertical block 21, so that the outer support plate 22 is fixed firmly on the claw body.

[0055] The mounting base includes a base, a base plate 9, and multiple fixing bolts 12. The base includes a mounting plate 1, a first cylinder 2, and a second cylinder 3. Multiple radial guide holes 5 are sequentially arranged along the circumference of the mounting plate 1. The bottom connector 23 can be fixed to the center of the upper part of the mounting plate 1. The first cylinder 2 and the second cylinder 3 are both located at the bottom of the mounting plate 1. The first cylinder 2 is fitted around the outside of the second cylinder 3 with a gap. A third cylinder 10 is arranged on the upper part of the base plate 9. The third cylinder 10 is fitted around the outside of the second cylinder 3 and fits against the second cylinder 3. The base plate 9 is fixed to the bottom of the second cylinder 3 by multiple fixing bolts 12. A turntable 13 is fitted around the outside of the second cylinder 3 and located above the third cylinder 10. The turntable 13 fits against the second cylinder 3, and the third cylinder 10 contacts the bottom bevel gear 15 to support it. The first cylinder 2 has a plurality of mounting holes 7 arranged sequentially along the circumferential direction on the side wall, the third cylinder 10 has a plurality of mounting openings 11 arranged sequentially along the circumferential direction on the side wall, and the second cylinder 3 has a plurality of mounting grooves 8 arranged sequentially along the circumferential direction on the outer side wall. The mounting holes 7, mounting openings 11 and mounting grooves 8 are arranged in a one-to-one correspondence. Each drive bevel gear 16 passes through a mounting hole 7 and a mounting opening 11 in sequence and is rotatably installed in a mounting groove 8.

[0056] In this embodiment, the gear 29 shaft of the drive bevel gear 16 is rotatably mounted in the mounting groove 8 via a bearing. The outer end of the drive bevel gear 16 is provided with a square groove 17 so that a square tool can be inserted into the square groove 17 to rotate the drive bevel gear 16.

[0057] In this specific embodiment, the bottom connector 23 is a bottom connecting shaft, and the upper part of the mounting plate 1 is provided with a positioning groove 4 that matches the structure of the bottom connecting shaft, so that the bottom connecting shaft can be engaged in the positioning groove 4. Specifically, the bottom connecting shaft is a flat shaft so that it will not rotate relative to the mounting plate 1.

[0058] like Figures 6-8 As shown, the driving component is a hollow worm gear 26, which is fixedly sleeved on the central shaft 25. The transmission assembly includes a gear 29 and a rack 30. The gear 29 is rotatably mounted on the mounting block 28 and meshes with the hollow worm gear 26. The central axis of the gear 29 is perpendicular to the central axis of the central shaft 25. One end of the inner support plate 32 is provided with a horizontal slide plate 31, which is slidably mounted in the radial guide groove. The rack 30 is set on the horizontal slide plate 31 and meshes with the gear 29.

[0059] In use, by rotating the central shaft 25, the hollow worm gear 26 rotates synchronously, which in turn causes the gear 29 meshing with the hollow worm gear 26 to rotate. This further causes the rack 30 meshing with the gear 29 and the horizontal sliding plate 31 fixedly connected to the rack 30 to reciprocate along the radial guide groove, so that the inner support plate 32 reciprocates along the radial direction. This allows the adjustment of the inner shaping device to be realized according to the different diameters of the injection molded pipe material 42.

[0060] In the embodiment, the hollow worm 26 is a hollow Archimedes worm, the gear 29 is a helical gear, and the rack 30 is a helical rack.

[0061] The hollow worm 26 and the inner support mechanism in the embodiment are both provided in two, the hollow worm 26 corresponds to the inner support mechanism one by one, and each hollow worm 26 is used to drive the plurality of gears 29 in one inner support mechanism. By providing one inner support mechanism in the upper part and the lower part, the upper part and the lower part of the inner side wall of the injection tube material 42 with high height can be supported and shaped, and the shaping effect is improved.

[0062] One hollow worm 26 is fixedly sleeved on the upper part of the central shaft 25 and located above the outer cylinder 27, the plurality of mounting blocks 28 of one inner support mechanism are sequentially fixed to the upper part of the outer side of the outer cylinder 27 in the circumferential direction, the upper part of each mounting block 28 is provided with a radial guide groove, each mounting block 28 is rotatably installed with a gear 29 on the upper part, and each rack 30 is provided on the upper part of the horizontal sliding plate 31.

[0063] Another hollow worm 26 is fixedly sleeved on the lower part of the central shaft 25 and located below the outer cylinder 27, the plurality of mounting blocks 28 of another inner support mechanism are sequentially fixed to the lower part of the outer side of the outer cylinder 27 in the circumferential direction, the lower part of each mounting block 28 is provided with a radial guide groove, each mounting block 28 is rotatably installed with a gear 29 on the lower part, each rack 30 is provided on the lower part of the horizontal sliding plate 31, and each mounting block 28 is fixedly connected with the bottom connecting piece 23 through two connecting rods 33. The connecting rod 33 in the embodiment is an L-shaped rod.

[0064] Specifically, the plurality of inner support plates 32 of the upper inner support mechanism correspond to the plurality of inner support plates 32 of the lower inner support mechanism. The number of the inner support plates 32 of each inner support mechanism is the same as the number of the outer support plates 22, and the inner support plates 32 and the outer support plates 22 are staggered.

[0065] In the embodiment, the outer support plate 22 and the inner support plate 32 are both arc-shaped plates. The outer support plate 22 and the inner support plate 32 are both provided in three.

[0066] The specific use process is as follows: initially, the upper cover plate is not installed on the outer shaping device and the inner shaping device, the injection pipe material 42 is sleeved on the outside of the plurality of inner support plates 32, the upper and lower two hollow worms 26 are synchronously rotated by rotating the central shaft 25, the gear 29 engaged with the hollow worm 26 is rotated, the rack 30 engaged with the gear 29 and the horizontal sliding plate 31 fixedly connected with the rack 30 are reciprocated along the radial guide groove, so that the plurality of inner support plates 32 of the upper part move radially outward, and the plurality of inner support plates 32 of the lower part move radially outward, until the plurality of inner support plates 32 of the upper part and the plurality of inner support plates 32 of the lower part are in contact with the inner side wall of the injection pipe material 42.

[0067] Then one of the driving bevel gears 16 is rotated, the bottom bevel gear 15 and the rotating disc 13 are rotated, the helical rack 14 on the upper part of the rotating disc 13 is rotated, under the cooperation of the meshing teeth 20, the clamping jaw body and the outer support plate 22 move radially along the radial guide hole 5 towards the inner side, until the plurality of outer support plates 22 are in contact with the outer side wall of the injection pipe material 42.

[0068] Finally, the upper cover plate is sleeved on the central shaft 25 and is in contact with the upper part of the plurality of outer support plates 22, a locking bolt 40 is installed in each radial strip-shaped hole 39, the locking bolt 40 is installed in the corresponding threaded hole 41, the locking bolt 40 is tightened, the upper cover plate is fixedly connected with the plurality of outer support plates 22, the gasket 34 and the locking nut 35 are sequentially installed on the upper part of the central shaft 25, and the locking nut 35 is tightened, so that the central shaft 25 is fixedly connected with the upper cover plate.

[0069] After the shaping work is completed, the locking nut 35 and the locking bolt 40 are removed, then the upper cover plate is removed, the outer support plate 22 and the inner support plate 32 are moved away from the injection pipe material 42 by adjusting the outer shaping device and the inner shaping device, and the injection pipe material 42 on which the shaping work is completed can be taken out.

[0070] The principles and implementation manners of the present application are described by using specific examples in the specification, and the above examples are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed. In conclusion, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A pipe sizing tool for injection molding, the tool comprising: The application relates to an external shaping device and an internal shaping device, wherein the external shaping device comprises a mounting base, a driving mechanism and a plurality of claw mechanisms; the upper portion of the mounting base is sequentially provided with a plurality of radial guide holes in the circumferential direction; the lower portion of each claw mechanism is slidingly installed in one radial guide hole; the driving mechanism is arranged on the mounting base and is used for driving the plurality of claw mechanisms to reciprocatingly move along the radial guide holes; the upper portion of each claw mechanism is provided with an external support plate; the plurality of external support plates are used for supporting and shaping the outside of injection pipe materials; the internal shaping device is arranged on the inner side of the plurality of external support plates; the internal shaping device comprises a bottom connecting piece, a center positioning pin, a center shaft, an outer cylinder, a driving part and an internal support mechanism; the bottom connecting piece can be fixed at the center of the upper portion of the mounting base; the center positioning pin is fixed on the bottom connecting piece and extends above the bottom connecting piece; the lower end of the center shaft is rotatably installed on the center positioning pin; the outer cylinder is sleeved on the outside of the center shaft and is fixed on the bottom connecting piece; the driving part is fixedly sleeved on the center shaft; the internal support mechanism comprises a plurality of internal support assemblies which are sequentially arranged on the outer cylinder in the circumferential direction; the internal support assembly comprises a mounting block, an internal support plate and a transmission assembly; the mounting block is fixed on the outside of the outer cylinder; the mounting block is provided with a radial guide groove; one end of the internal support plate is slidingly installed in the radial guide groove; the driving part can drive one internal support plate to reciprocatingly move along the radial guide groove through the transmission assembly; the plurality of internal support plates are used for supporting and shaping the inside of injection pipe materials; the driving mechanism comprises a rotating disc, a bottom bevel gear, a helical rack and a plurality of driving bevel gears; the rotating disc is rotatably installed in the mounting base; the lower surface of the rotating disc is provided with the bottom bevel gear; the plurality of driving bevel gears are sequentially arranged on the mounting base in the circumferential direction, extend into the inside of the mounting base and are in mesh with the bottom bevel gear; the upper surface of the rotating disc is provided with the helical rack; the claw mechanism comprises a claw body; the bottom of the claw body is provided with a plurality of meshing teeth which are matched with the helical rack; the lower end of the external support plate is fixed on the claw body; the claw body comprises a horizontal block and a vertical block which is arranged on the upper portion of the outer side of the horizontal block; the meshing teeth are arranged on the bottom of the horizontal block; the opposite two side walls of the radial guide hole are provided with radial guide rails; the two sides of the horizontal block are provided with radial grooves which are used for slidingly being installed on the radial guide rails; the lower portion of the external support plate is fixed on the upper portion of the horizontal block and the inner side of the vertical block.The mounting seat comprises a base, a bottom plate and a plurality of fixing bolts, the base comprises a mounting plate, a first cylinder and a second cylinder, a plurality of radial guide holes are sequentially arranged on the mounting plate in the circumferential direction, the bottom connector can be fixed at the center of the upper part of the mounting plate, the first cylinder and the second cylinder are arranged at the bottom of the mounting plate, the first cylinder is gap-set outside the second cylinder, the upper part of the bottom plate is provided with a third cylinder, the third cylinder is gap-set outside the second cylinder and is in close contact with the second cylinder, the bottom plate is fixed to the bottom of the second cylinder through a plurality of fixing bolts, the rotating disc is gap-set outside the second cylinder and is located above the third cylinder, a plurality of mounting holes are sequentially arranged on the side wall of the first cylinder in the circumferential direction, a plurality of mounting openings are sequentially arranged on the side wall of the third cylinder in the circumferential direction, a plurality of mounting grooves are sequentially arranged on the outer side wall of the second cylinder in the circumferential direction, each driving bevel gear sequentially passes through one mounting hole, one mounting opening and is rotatably installed in one mounting groove; the driving component is a hollow worm, the hollow worm is fixedly gap-set on the central shaft, the transmission assembly comprises a gear and a rack, the gear is rotatably installed on the mounting block and is in mesh with the hollow worm, one end of the inner support plate is provided with a horizontal sliding plate, the horizontal sliding plate is slidingly installed in the radial guide groove, the rack is arranged on the horizontal sliding plate and is in mesh with the gear; the hollow worm and the inner support mechanism are both arranged as two, the hollow worm corresponds to the inner support mechanism one by one, each hollow worm is used for driving a plurality of gears in one inner support mechanism; one hollow worm is fixedly gap-set on the upper part of the central shaft and is located above the outer cylinder, a plurality of mounting blocks of one inner support mechanism are sequentially fixed on the upper part of the outer side of the outer cylinder in the circumferential direction, the upper part of each mounting block is provided with one radial guide groove, the lower part of each mounting block is rotatably installed with one gear, and each rack is arranged on the upper part of the horizontal sliding plate; another hollow worm is fixedly gap-set on the lower part of the central shaft and is located below the outer cylinder, a plurality of mounting blocks of another inner support mechanism are sequentially fixed on the lower part of the outer side of the outer cylinder in the circumferential direction, the lower part of each mounting block is provided with one radial guide groove, the lower part of each mounting block is rotatably installed with one gear, each rack is arranged on the lower part of the horizontal sliding plate, and each mounting block is fixedly connected with the bottom connector through two connecting rods.

2. The injection tube sizing tool of claim 1, wherein, The upper cover plate is arranged above the plurality of outer support plates and is sleeved on the central shaft. The inner locking mechanism is used for locking the central shaft on the upper cover plate. The outer locking mechanism is used for locking the plurality of outer support plates on the upper cover plate.

3. The injection tube sizing tool of claim 2, wherein, The upper cover plate comprises a central plate, an outer ring and a plurality of radial strip plates. The inner and outer ends of each radial strip plate are connected with the outer side of the central plate and the inner side of the outer ring respectively. Each radial strip plate is located on the upper part of one outer support plate. The outer locking mechanism is used for locking each radial strip plate on one outer support plate. The central plate is sleeved on the central shaft. The inner locking mechanism is used for locking the central shaft on the central plate.

4. The injection tube sizing tool of claim 3, wherein, The inner locking mechanism comprises a locking nut and a gasket. The outer side wall of the upper end of the central shaft is provided with external threads. The gasket is sleeved on the central shaft and located on the upper part of the central plate. The locking nut is installed on the upper end of the central shaft and located on the upper part of the gasket. The locking nut is used for making the gasket abut against the central plate.

5. The injection tube sizing tool of claim 3, wherein, The outer locking mechanism comprises a plurality of locking bolts. Each radial strip plate is provided with a radial strip hole. The upper end of each outer support plate is provided with a threaded hole. Each locking bolt is used for penetrating through one radial strip hole and being installed in one threaded hole.

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