Seat backrest framework injection mold capable of achieving rapid demolding

Abstract

The utility model belongs to the technical field of injection molding, and discloses a seat backrest framework injection mold capable of achieving rapid demolding, which comprises a rack, a workbench, a lower mold, a portal frame, a lifting plate, an upper mold, a hydraulic cylinder and a containing groove, a supporting ring and a tray are arranged in the containing groove, and a first sliding hole and a plurality of second sliding holes are formed in the middle of the bottom of the containing groove. First sliding rods with the tops connected with the tray are arranged in the first sliding holes in a sliding mode, second sliding rods are arranged in the second sliding holes in a sliding mode, the tops of the second sliding rods are all connected with the supporting ring, a mounting frame is arranged in the rack, a first rack is arranged at the bottom of the first sliding rod, a lower pushing ring is vertically arranged on the mounting frame in a sliding mode, and a second rack is vertically arranged at the bottom of the lower pushing ring. A rotating shaft and a driving assembly are rotationally arranged on the mounting frame, and the rotating shaft is fixedly sleeved with a first gear and a second gear. And the tray ascends to jack up the injection molding finished product and separate the injection molding finished product from the lower mold and the supporting ring. And after the tray ascends for a certain distance, the supporting ring ascends at a higher speed, so that an injection molding finished product is jacked up from the tray.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding technical field especially relates to a seat backrest framework injection mold of quick demoulding. BACKGROUND

[0002] Injection molding is also called injection molding, it is a kind of injection and molding forming method.The advantage of injection molding method is fast production speed, high efficiency, operation can realize automation, and the color variety is more, shape can be from simple to complex, size can be from big to small, and product size is accurate, product is easy to update, can form the workpiece of complex shape, injection molding is suitable for a large number of production and complex product forming processing field.In injection molding, injection mold provides mold cavity for plastic injection.

[0003] In the Chinese utility model patent with publication number CN218985533U discloses a kind of injection molding product quick demolding mold, including workbench, the top of workbench is fixedly connected with electric telescopic rod, the top of electric telescopic rod is fixedly connected with connecting plate, the bottom of connecting plate is fixedly connected with upper injection mold, both sides of connecting plate are fixedly connected with side plate, the inner side of side plate is fixedly connected with connecting rod, the top of connecting rod is fixedly connected with top rod, the top of workbench is fixedly connected with lower injection mold, the bottom of lower injection mold is recessed, the bottom of lower injection mold is provided with movable mouth, movable mouth is slidably connected with movable rod in its inside, the top of movable rod is fixedly installed with top disc.When demolding is needed, upper injection mold rises and separates from lower injection mold, to drive the side plate on both sides to rise, then connecting rod will push top rod to slide and rise along the inside of movable rod, when contact with the top inside movable rod, movable rod will be lifted, so that top disc is separated from recess and injection product is ejected from the inside of mold cavity on lower injection mold.

[0004] For the related technology in the above, the inventor believes that the following defects exist: the middle part of the injection product cools slowly during the use of the above device, which is easy to stick to the top disc, so that the top plate is lifted after the product is lifted, and the injection product is not convenient for workers to take off from the top plate. UTILITY MODEL CONTENT

[0005] In order to solve the above problems, the utility model provides a kind of injection mold of seat backrest framework of quick demolding.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a quick-release injection mold for a seat back frame, comprising a frame, a worktable on the frame, a lower mold on the worktable, an opening in the middle of the lower mold on the worktable, a gantry frame on the worktable, a lifting plate slidably mounted vertically on the gantry frame, an upper mold at the bottom of the lifting plate, an injection port on the upper mold, a hydraulic cylinder vertically mounted on the gantry frame, the piston of the hydraulic cylinder passing downward through the top of the gantry frame and connecting to the lifting plate, a circular receiving groove on the lower mold, a support ring and a tray disposed in the receiving groove, the tray being located in the middle of the support ring, and a first sliding hole vertically formed in the middle of the bottom of the receiving groove. A first sliding rod, whose top is connected to the tray, is slidably disposed within the first sliding hole. Several second sliding holes, arranged circumferentially at intervals, are vertically opened on the bottom of the receiving groove. Second sliding rods are slidably disposed within the second sliding holes. The tops of the second sliding rods are all connected to a support ring. A mounting frame is provided within the frame. A first rack is vertically disposed at the bottom of the first sliding rod. A downward pushing ring is vertically slidably disposed on the mounting frame. A second rack is vertically disposed at the bottom of the downward pushing ring. A rotating shaft is horizontally rotatably disposed on the mounting frame. A driving assembly for driving the rotating shaft is provided on the mounting frame. A first gear and a second gear are fixedly sleeved on the rotating shaft. The first gear meshes with the first rack, and the second gear meshes with the second rack. The diameter of the first gear is smaller than the diameter of the second gear.

[0007] By adopting the above technical solution, a frame, worktable, support ring, tray, rotating shaft, and drive assembly are set up. A hydraulic cylinder drives the lifting plate and upper mold to descend, achieving the engagement of the upper and lower molds. Then, the injection molding process is performed. After injection molding, the hydraulic cylinder again drives the lifting plate and upper mold to rise. Subsequently, the drive assembly drives the rotating shaft to rotate, which in turn drives the first gear and the second gear to rotate. The rotation of the first gear causes the first rack, first slide bar, and tray to rise together, lifting the injection-molded product and separating it from the lower mold and support ring. Simultaneously, the rotation of the second gear drives the second rack and lower push ring to rise. When the lower push ring rises a certain distance, it contacts the second slide bar, pushing the support ring to rise. Because the diameter of the first gear is smaller than that of the second gear, the rising speed of the second rack exceeds that of the first rack. This results in the support ring rising faster after the tray has risen a certain distance, thus lifting the injection-molded product off the tray and ensuring that the product does not stick to the tray or support ring, making it easy for workers to remove the injection-molded product.

[0008] Furthermore, the outer diameter of the support ring is the same as the diameter of the receiving groove, and the diameter of the tray is the same as the inner diameter of the support ring.

[0009] Further, the rack bottom is provided with a bottom plate, the mounting frame comprises vertical plates which are arranged on the bottom plate in a spaced manner, the top portions of the two vertical plates are jointly provided with a mounting plate, a guide hole is vertically formed in the mounting plate, a guide rod is vertically and slidably arranged in the guide hole, and the top portion of the guide rod is connected with the bottom portion of the push-down ring.

[0010] By adopting the above technical scheme, the guide hole and the guide rod are arranged, so that the lifting of the push-down ring is stable.

[0011] Further, the bottom portions of the plurality of second sliding rods are jointly provided with a push-up ring.

[0012] By adopting the above technical scheme, the bottom portions of the plurality of second sliding rods are jointly provided with a push-up ring, the push-up ring connects the plurality of second sliding rods, and the push-down ring is in contact with the push-up ring when the push-down ring is lifted, so that the sliding of the second sliding rods is stable.

[0013] Further, a compression spring is sleeved on the rod between the bottom portion of the lower mold and the push-up ring of the second sliding rod, the upper end of the compression spring is connected with the bottom portion of the lower mold, and the lower end of the compression spring is connected with the top portion of the push-up ring.

[0014] By adopting the above technical scheme, the compression spring is sleeved on the rod between the bottom portion of the lower mold and the push-up ring of the second sliding rod, when the push-down ring is reset, the compression spring pushes the push-up ring to reset, drives the supporting ring to reset, and the resetting is accurate.

[0015] Further, the driving assembly comprises a mounting seat arranged on one of the vertical plates, the rotating shaft is rotatably connected with the corresponding vertical plate at both ends, the mounting seat is horizontally provided with a driving motor, and one end of the rotating shaft penetrates through the vertical plate and is connected with the output shaft of the driving motor.

[0016] By adopting the above technical scheme, the mounting seat and the driving motor are arranged, and the driving motor drives the rotating shaft to rotate.

[0017] Further, the first rack and the second rack are both provided with sliding rails, sliding blocks are slidably arranged on the sliding rails, and the sliding blocks are connected with the mounting plate.

[0018] By adopting the above technical scheme, the sliding rails and the sliding blocks are arranged, so that the sliding of the first rack and the second rack is stable, and the stable meshing with the first gear and the second gear is ensured.

[0019] In conclusion, the utility model has the following beneficial effects: setting up frame, workstation, support ring, tray, rotating shaft, drive assembly, hydraulic cylinder drives lifting plate and upper die to descend, realizes the cooperation of upper die and lower die. Then, the injection molding process is carried out, after the injection molding is completed, the hydraulic cylinder drives lifting plate and upper die to ascend again. Subsequently, drive assembly drives rotating shaft to rotate, and then drives first gear and second gear to rotate. The rotation of first gear makes first rack, first slide rod and tray ascend together, and the injection molding product is lifted, and is separated from lower die and support ring. At the same time, the rotation of second gear drives second rack and push ring to ascend, and when the push ring ascends to a certain distance, it contacts with second slide rod, and pushes support ring to ascend. Because the diameter of first gear is less than second gear, the ascending speed of second rack will exceed first rack, so that support ring ascends faster after ascending a distance, and the injection molding product is lifted from tray, and it is ensured that the product is not adhered to tray and support ring, and the injection molding product is easily taken down by staff. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of the utility model embodiment;

[0021] Figure 2 It is the structure schematic diagram of frame and mounting frame of the utility model embodiment;

[0022] Figure 3 It is the structure schematic diagram of mounting frame, push ring and push ring of the utility model embodiment;

[0023] Figure 4 It is the structure schematic diagram of mounting frame and push ring of the utility model embodiment;

[0024] Figure 5 It is the structure schematic diagram of mounting frame and drive assembly of the utility model embodiment.

[0025] In the drawing: 10, frame;11, workstation;12, lower die;13, opening;14, gantry;15, lifting plate;16, upper die;17, hydraulic cylinder;18, containing groove;19, bottom plate;20, support ring;21, tray;22, first slide hole;23, first slide rod;24, second slide hole;25, second slide rod;26, push ring;27, compression spring;30, mounting frame;31, vertical plate;32, mounting plate;33, guide hole;34, guide rod;40, first rack;41, push ring;42, second rack;43, rotating shaft;44, first gear;45, second gear;46, slide rail;47, sliding block;50, drive assembly;51, mounting seat;52, drive motor. DETAILED DESCRIPTION

[0026] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor fall within the protection scope of the present application.

[0027] As shown in Figures 1-5 The present application discloses a seat backrest framework injection mold with rapid demolding, which comprises a rack 10, a workbench 11, a lower mold 12, an upper mold 16, a driving assembly 50, the workbench 11 is arranged on the rack 10, the lower mold 12 is arranged on the workbench 11, an opening 13 is arranged in the middle of the lower mold 12, a gantry 14 is arranged on the workbench 11, a lifting plate 15 is vertically arranged on the gantry 14, the gantry 14 comprises two vertical columns, a top plate is arranged on the top of the two vertical columns, a sliding groove is vertically arranged on one side of each of the two vertical columns, a sliding block connected with the lifting plate 15 is arranged in the sliding groove, and the stability of the lifting plate 15 is ensured. The upper mold 16 is arranged at the bottom of the lifting plate 15, the upper mold 16 is provided with an injection port, a hydraulic cylinder 17 is vertically arranged on the gantry 14, the piston of the hydraulic cylinder 17 penetrates through the top of the gantry 14 and is connected with the lifting plate 15, the hydraulic cylinder 17 drives the lifting plate 15 and the upper mold 16 to descend, and the cooperation between the upper mold 16 and the lower mold 12 is realized. Then the injection process is carried out, after the injection is completed, the hydraulic cylinder 17 drives the lifting plate 15 and the upper mold 16 to ascend again.

[0028] Specifically, the lower mold 12 is provided with a circular accommodating groove 18, a supporting ring 20 and a supporting tray 21 are arranged in the accommodating groove 18, and the supporting tray 21 is located in the middle of the supporting ring 20. The outer diameter of the supporting ring 20 is consistent with the diameter of the accommodating groove 18, and the diameter of the supporting tray 21 is consistent with the inner diameter of the supporting ring 20, so that the supporting ring 20 and the supporting tray 21 become a part of the lower mold 12, facilitating the molding of the injection molding product. A first sliding hole 22 is vertically arranged in the middle of the bottom of the accommodating groove 18, a first sliding rod 23 connected with the top of the supporting tray 21 is slidably arranged in the first sliding hole 22, so that the supporting tray 21 can be lifted. A plurality of second sliding holes 24 are vertically arranged on the bottom of the accommodating groove 18, a second sliding rod 25 is slidably arranged in each second sliding hole 24, and the top of each second sliding rod 25 is connected with the supporting ring 20, so that the supporting ring 20 can be lifted. A mounting frame 30 is arranged in the rack 10, a first gear rack 40 is vertically arranged at the bottom of the first sliding rod 23, a lower pushing ring 41 is vertically slidably arranged on the mounting frame 30, and the lower pushing ring 41 is a certain distance away from the second sliding rod 25 in the initial state. A second gear rack 42 is vertically arranged at the bottom of the lower pushing ring 41, a rotating shaft 43 is horizontally rotatably arranged on the mounting frame 30, a driving assembly 50 is arranged on the mounting frame 30 and used for driving the rotating shaft 43 to rotate. A first gear 44 and a second gear 45 are fixedly sleeved on the rotating shaft 43, the first gear 44 is engaged with the first gear rack 40, the second gear 45 is engaged with the second gear rack 42, and the diameter of the first gear 44 is smaller than that of the second gear 45. The driving assembly 50 drives the rotating shaft 43 to rotate, and then drives the first gear 44 and the second gear 45 to rotate. The rotation of the first gear 44 drives the first gear rack 40, the first sliding rod 23 and the supporting tray 21 to rise together, and the injection molding product is lifted and separated from the lower mold 12 and the supporting ring 20. At the same time, the rotation of the second gear 45 drives the second gear rack 42 and the lower pushing ring 41 to rise, and when the lower pushing ring 41 rises to a certain distance, the lower pushing ring 41 contacts the second sliding rod 25 and drives the supporting ring 20 to rise. Because the diameter of the first gear 44 is smaller than that of the second gear 45, the rising speed of the second gear rack 42 will be faster than that of the first gear rack 40, so that the supporting ring 20 rises faster after the supporting tray 21 rises a distance, thereby lifting the injection molding product from the supporting tray 21, ensuring that the product is not adhered to the supporting tray 21 and the supporting ring 20, and facilitating the workers to easily take down the injection molding product.

[0029] When the machine frame 10 is set, the bottom of the machine frame 10 is provided with a bottom plate 19, the mounting frame 30 comprises vertical plates 31 which are arranged at intervals on the bottom plate 19, the top of the two vertical plates 31 is commonly provided with a mounting plate 32, the mounting plate 32 is vertically provided with a guide hole 33, the guide hole 33 is vertically slidably provided with a guide rod 34, the top of the guide rod 34 is connected with the bottom of a lower push ring 41, so as to ensure the stability of the lifting of the lower push ring 41. The bottom of the second slide rod 25 is commonly provided with an upper push ring 26, and the lower push ring 41 has a certain distance from the upper push ring 26 in the initial state. The upper push ring 26 connects the second slide rod 25, and the lower push ring 41 is in contact with the upper push ring 26 when it is lifted, so as to enhance the stability of the sliding of the second slide rod 25. The second slide rod 25 is sleeved with a compression spring 27 on the rod between the bottom of the lower mold 12 and the upper push ring 26, the upper end of the compression spring 27 is connected with the bottom of the lower mold 12, and the lower end is connected with the top of the upper push ring 26. When the lower push ring 41 is reset, the compression spring 27 pushes the upper push ring 26 to reset, drives the supporting ring 20 to reset, and ensures the accuracy of the reset. The first rack 40 and the second rack 42 are both provided with a slide rail 46, the slide rail 46 is slidably provided with a sliding block 47, the sliding block 47 is connected with the mounting plate 32, so as to ensure the stability of the sliding of the first rack 40 and the second rack 42, and thus ensure the stable meshing with the first gear 44 and the second gear 45 respectively.

[0030] When specifically set, the driving assembly 50 comprises a mounting seat 51 arranged on one of the vertical plates 31, the rotating shaft 43 is rotatably connected with the corresponding vertical plate 31 at both ends, the mounting seat 51 is horizontally provided with a driving motor 52, one end of the rotating shaft 43 passes through the vertical plate 31 and is connected with the output shaft of the driving motor 52, and the driving motor 52 drives the rotating shaft 43 to rotate.

[0031] The use principle of the seat backrest framework injection mold of the embodiment is as follows: the hydraulic cylinder 17 drives the lifting plate 15 and the upper mold 16 to descend, and the upper mold 16 is matched with the lower mold 12. Then, the injection process is carried out, after the injection is completed, the hydraulic cylinder 17 drives the lifting plate 15 and the upper mold 16 to ascend again. Subsequently, the driving motor 52 is driven to drive the rotating shaft 43 to rotate, and then the first gear 44 and the second gear 45 are driven to rotate. The rotation of the first gear 44 drives the first rack 40, the first sliding rod 23 and the tray 21 to ascend together, and the injection product is lifted to separate from the lower mold 12 and the supporting ring 20. At the same time, the rotation of the second gear 45 drives the second rack 42 and the pushing ring 41 to ascend, and when the pushing ring 41 ascends to a certain distance, the pushing ring 41 contacts with the upper pushing ring 26, and drives the upper pushing ring 26, the second sliding rod 25 and the supporting ring 20 to ascend. Since the diameter of the first gear 44 is smaller than that of the second gear 45, the ascending speed of the second rack 42 is faster than that of the first rack 40, so that the supporting ring 20 ascends faster after the tray 21 ascends a distance, and the injection product is lifted from the tray 21, and the product is separated from the tray 21 and the supporting ring 20, so that the injection product can be easily taken down by the staff.

[0032] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the present application are also considered as the protection scope of the present application.

Claims

1. A rapid demolding seat back frame injection mold characterized by: The utility model provides a kind of injection molding machine, including rack (10), workbench (11) is provided on the rack (10), lower mould (12) is provided on the workbench (11), opening (13) is opened in the middle part of lower mould (12) on the workbench (11), portal frame (14) is provided on the workbench (11), lifting plate (15) is vertically slidably arranged on the portal frame (14), upper mould (16) is provided on the bottom of lifting plate (15), injection port is provided on the upper mould (16), hydraulic cylinder (17) is vertically arranged on the portal frame (14), the piston of the hydraulic cylinder (17) passes through the top of portal frame (14) downward and is connected with lifting plate (15), the accommodating groove (18) that is circular is opened in lower mould (12), the accommodating groove (18) is provided with support ring (20) and tray (21), the tray (21) is located in the middle part of support ring (20), the first sliding hole (22) is vertically opened in the middle part of accommodating groove (18) groove bottom, the first sliding rod (23) that is slidably arranged in the first sliding hole (22) is connected with the tray (21) on the top, the second sliding hole (24) is vertically opened on the groove bottom of accommodating groove (18) and is arranged in the second sliding hole (24) slidably with the second sliding rod (25), the top of the second sliding rod (25) is connected with support ring (20), mounting bracket (30) is provided in the rack (10), the first rack (40) is vertically arranged on the bottom of first sliding rod (23), the lower push ring (41) is vertically slidably arranged on the mounting bracket (30), the second rack (42) is vertically arranged on the bottom of lower push ring (41), the rotating shaft (43) is horizontally rotatably arranged on the mounting bracket (30), the drive assembly (50) for driving rotating shaft (43) rotation is provided on the mounting bracket (30), the first gear (44) and second gear (45) are fixedly sleeved on the rotating shaft (43), the first gear (44) is engaged with the first rack (40), the second gear (45) is engaged with the second rack (42), and the diameter of the first gear (44) is less than the diameter of the second gear (45).

2. The rapid demolding seat back frame injection mold of claim 1, wherein: The outer diameter of the support ring (20) is consistent with the diameter of the accommodating groove (18), and the diameter of the tray (21) is consistent with the inner diameter of the support ring (20).

3. The rapid demolding seat back frame injection mold of claim 1, wherein: The bottom plate (19) is provided on the bottom of the rack (10), the mounting bracket (30) comprises stand plates (31) which are arranged at intervals on the bottom plate (19), the top of the two stand plates (31) is commonly provided with an installation plate (32), the guide hole (33) is vertically arranged on the installation plate (32), the guide rod (34) is vertically slidably arranged in the guide hole (33), and the top of the guide rod (34) is connected with the bottom of the lower push ring (41).

4. The rapid demolding seat back frame injection mold of claim 3, wherein: The bottom of the second sliding rod (25) is commonly provided with an upper push ring (26).

5. The rapid demolding seat back frame injection mold of claim 4, wherein: The second slide rod (25) is sleeved with a compression spring (27) on the rod between the bottom of the lower mold (12) and the upper push ring (26), the upper end of the compression spring (27) is connected with the bottom of the lower mold (12), and the lower end is connected with the top of the upper push ring (26).

6. The rapid demolding seat back frame injection mold of claim 3, wherein: The driving assembly (50) comprises a mounting seat (51) arranged on one of the vertical plates (31), both ends of the rotating shaft (43) are rotatably connected with the corresponding vertical plate (31), and the mounting seat (51) is horizontally provided with a driving motor (52); one end of the rotating shaft (43) penetrates through the vertical plate (31) and is connected with the output shaft of the driving motor (52).

7. The rapid demolding seat back frame injection mold of claim 3, wherein: The first rack (40) and the second rack (42) are both provided with sliding rails (46), the sliding rails (46) are slidably provided with sliding blocks (47), and the sliding blocks (47) are connected with the mounting plate (32).

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