Vertical inverted rod type mold closing mechanism and injection molding machine

Abstract

The utility model discloses a vertical inverted rod type mold closing mechanism and an injection molding machine, which comprise a lower mold plate, a mold opening and closing machine column, an upper mold plate and an upper mold plate, and an inverted mold closing screw rod mechanism for realizing mold opening and closing is arranged on the upper mold plate. The inverted mold closing lead screw mechanism comprises a mold closing lead screw transmission assembly and a mold adjusting assembly driving the upper mold plate to move up and down along the mold opening and closing machine column, the mold closing lead screw transmission assembly comprises a lead screw assembly and a crankshaft assembly, and the crankshaft assembly is hinged to the upper mold plate and the upper mold plate. The lead screw assembly is arranged on the upper die plate in a penetrating mode and connected with the crankshaft assembly. According to the vertical inverted rod type mold closing mechanism, mold opening and closing operation is achieved through the inverted mold closing lead screw mechanism, and precision and stability are high; the inverted mold opening and closing lead screw mechanism is arranged on the upper portion of the upper mold plate, the workbench has more descending space, and the field requirements of users can be met. The maintenance cost is low; the crankshaft transmission structure is relatively simple, the number of parts is small, and the overall reliability is high.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to a vertical inverted rod type mold clamping mechanism and an injection molding machine. Background Technology

[0002] Currently, mold opening and closing mechanisms are mainly operated by hydraulic cylinders. Due to the large size of these cylinders, the center of gravity cannot be too high to ensure machine stability. Therefore, the cylinders are generally located under the machine frame. This results in a relatively high worktable, which is inconvenient for manual operation. Furthermore, repairing the cylinders requires almost disassembling the entire mold closing assembly, making operation extremely inconvenient. In addition, the use of hydraulic cylinders has inherent defects, such as a tendency to leak, leading to environmental problems and poor surrounding hygiene.

[0003] Chinese patent document CN2579641Y discloses a toggle mold clamping mechanism for an injection molding machine. It has a fixed mold plate, a moving mold plate, a base plate, a tie rod, a mold clamping cylinder, and a toggle linkage mechanism. One end of the tie rod is fixedly connected to the base plate. The toggle linkage mechanism is hinged to the front end support of the piston rod of the mold clamping cylinder and the base plate, respectively. The other end of the tie rod is fixedly connected to the moving mold plate. The fixed mold plate is supported by a support frame and is set between the base plate and the moving mold plate. The tie rod is slidably engaged with the fixed mold plate. The toggle linkage mechanism is set between the fixed mold plate and the base plate and is also hinged to the fixed mold plate. A positioning frame is provided on one side of the fixed mold plate, and the mold clamping cylinder is fixed on the positioning frame.

[0004] Although the above technical solution employs a toggle linkage mechanism, it still suffers from the following problems: The mold-closing cylinder and toggle linkage mechanism are located below the base plate, limiting the worktable height and preventing a lower worktable. The mold-closing cylinder is almost at the very bottom of the entire mold-closing assembly; therefore, repairing the cylinder requires almost disassembling the entire machine, which is cumbersome, inconvenient, and results in excessively high maintenance costs. Leakage issues exist, which is environmentally unfriendly and aesthetically unappealing. The numerous components and complex structure, coupled with the hydraulic oil's temperature sensitivity, lead to low mold-closing stability. Utility Model Content

[0005] The purpose of this utility model is to solve the problems of existing mold clamping mechanisms that use a mold clamping cylinder located at the bottom of the injection molding machine, resulting in the worktable height not being set according to production needs, numerous parts, complex structure, low stability, inconvenient mold cylinder maintenance and operation, high cost, and leakage and environmental impact. In contrast, this utility model provides a vertical inverted rod type mold clamping mechanism, which has a simple structure, is inverted and set on the upper mold plate, is easy to maintain, the worktable height can be reasonably set according to needs, has no leakage, is environmentally friendly, and has good stability.

[0006] The technical solution adopted by this utility model to achieve its invention objective is as follows: a vertical inverted rod type mold closing mechanism, including a lower mold plate, a mold opening and closing machine column, an upper mold plate, and an upper-upper mold plate. An inverted mold closing screw mechanism for realizing mold opening and closing is provided on the upper-upper mold plate. The inverted mold closing screw mechanism includes a mold closing screw transmission assembly and a mold adjustment assembly that drives the upper-upper mold plate to move up and down along the mold opening and closing machine column. The mold closing screw transmission assembly includes a screw assembly and a crankshaft assembly. The crankshaft assembly is hinged to the upper-upper mold plate and the upper mold plate, respectively. The screw assembly passes through the upper-upper mold plate and is connected to the crankshaft assembly. This vertical inverted rod type mold closing mechanism adopts an inverted structure, setting the inverted mold closing screw mechanism on the upper-upper mold plate. The upper-upper mold plate is hinged to the upper mold plate through the crankshaft assembly, and the screw drives the crankshaft assembly and the upper mold plate to move downwards and upwards, thereby realizing the mold closing and opening movements. Simultaneously, the upper mold platen is driven by the mold adjustment component, which in turn moves it up and down along the mold opening and closing machine column, thus achieving mold closing and opening operations. The use of screw drive facilitates automation and intelligence, integrating advanced control algorithms and sensors for precise and rapid control response. Screw drive is unaffected by harsh environments such as low or high temperatures, ensuring high stability. The inverted mold closing screw mechanism is positioned above the upper mold platen, providing more space for the worktable to descend and meet user on-site needs. Maintenance and repair costs are lower. The crankshaft assembly drive has a relatively simple structure with fewer components, resulting in higher overall reliability.

[0007] Preferably, the lead screw assembly includes a ball screw and a mold-closing lead screw fixing assembly for connecting the ball screw to the upper mold plate. The lead screw assembly mainly includes a ball screw and a mold-closing lead screw fixing assembly. The ball screw and the mold-closing lead screw fixing assembly achieve a transmission connection between the ball screw, the upper mold plate, and the crankshaft assembly, thereby driving the upper mold plate to move and achieving the mold opening and closing motion.

[0008] Preferably, the mold clamping screw fixing assembly includes a mold clamping screw fixing sleeve connected to the upper mold plate, a ball screw bearing, and a screw nut for connecting to the crankshaft assembly. The mold clamping screw fixing assembly mainly includes a mold clamping screw fixing sleeve connected to the upper mold plate, a ball screw bearing for driving the screw to rotate, and a screw nut for connecting the screw to the crankshaft assembly.

[0009] Preferably, the crankshaft assembly includes a front connecting rod assembly, a rear connecting rod assembly, and a crosshead. The front and rear connecting rod assemblies each include an upper connecting rod, a middle connecting rod, and a lower connecting rod, respectively. The crankshaft assembly has the front and rear connecting rod assemblies arranged in pairs. The crosshead enables the hinge connection between the front and rear connecting rod assemblies, ensuring their synchronous movement. It also facilitates the connection between the lead screw and the crankshaft assembly, enabling stable and efficient synchronous mold opening and closing operations.

[0010] Preferably, the upper end of the upper connecting rod is hinged to the upper mold plate, the lower end of the upper connecting rod is hinged to the upper end of the lower connecting rod, the lower end of the lower connecting rod is hinged to the upper mold plate, one end of the middle connecting rod is hinged to the upper connecting rod, and the other end of the middle connecting rod is hinged to the crosshead. This structure of the upper, middle, and lower connecting rods achieves synchronization of the mold opening and closing movements, while also ensuring the consistency of the synchronized movements.

[0011] Preferably, the upper mold plate is provided with a crosshead mounting seat extending downward and inward, and the crosshead is connected to the upper mold plate via a combined mold guide post. In order to ensure the stability, compactness and simplification of the entire mold closing mechanism, a crosshead mounting seat is provided on the upper mold plate extending downward and inward, and a combined mold guide post is used to guide and connect it to the upper mold plate, thus ensuring accuracy and stability during the mold opening and closing process.

[0012] Preferably, the mold closing screw drive assembly further includes a power component, which includes a servo motor, an injection pulley one mounted on the servo motor, a firing pulley two mounted on the screw assembly, and a synchronous belt wound around the injection pulley one and the firing pulley two. The mold closing screw drive assembly also includes a power component, which uses a servo motor to drive the synchronous belt, thereby driving the screw to rotate. This, in turn, causes the crankshaft assembly and the upper mold plate to move downwards and upwards, realizing mold closing and opening operations, thus avoiding the risk of oil leakage and environmental pollution associated with using a mold cylinder.

[0013] Preferably, the mold adjustment assembly includes a cycloidal motor and a gear transmission assembly; two sets of cycloidal motors are symmetrically arranged. The mold adjustment assembly mainly uses the cycloidal motor to drive the gear transmission assembly to move, thereby driving the upper mold plate and the upper mold plate to move, and cooperating with the mold closing screw transmission assembly to realize the mold opening and closing movement.

[0014] Preferably, the gear transmission assembly includes meshing mold adjustment drive teeth, mold adjustment large gear, mold adjustment auxiliary teeth, and mold adjustment nut teeth; the mold adjustment drive teeth are disposed on the output shaft of the cycloidal motor, the mold adjustment large gear is coaxially disposed on the upper mold plate with the lead screw, the mold adjustment nut teeth are disposed on the mold opening and closing machine column, and the mold adjustment auxiliary teeth are disposed on the upper mold plate between the mold adjustment nut teeth and the mold adjustment large gear.

[0015] The technical solution adopted by this utility model to achieve its second inventive objective is: an injection molding machine, including the aforementioned vertical inverted rod type mold closing mechanism.

[0016] The beneficial effects of this utility model are as follows: This vertical inverted rod type mold closing mechanism uses an inverted mold closing screw mechanism to realize mold opening and closing operations. The screw drive is easy to automate and intelligently implement, integrating advanced control algorithms and sensors to achieve precise and rapid control response; the screw drive is not limited by harsh environments such as low and high temperatures, and has high stability; the inverted mold opening and closing screw mechanism is set on the upper part of the upper mold plate, providing more space for the worktable to descend, which can meet the needs of users on site. Maintenance and repair costs are lower; the crankshaft drive structure is relatively simple, with fewer parts, and overall reliability is high. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a vertical inverted rod type mold closing mechanism of this utility model.

[0018] Figure 2 This is a side view of the vertical inverted rod type mold closing mechanism of this utility model.

[0019] Figure 3 yes Figure 2 Sectional view of AA.

[0020] Figure 4 This is a cross-sectional view of the vertical inverted rod mold closing mechanism of this utility model from another angle.

[0021] Figure 5 This is a schematic diagram of the structure of the upper template in this utility model.

[0022] Figure 6 This is a schematic diagram of the structure of the upper template in this utility model.

[0023] Figure 7 yes Figure 6 A structural diagram from another angle.

[0024] Figure 8 This is a schematic diagram of a crankshaft assembly in this utility model.

[0025] Figure 9 This is a schematic diagram of the structure of an injection molding machine according to this utility model.

[0026] In the diagram: 100, vertical inverted rod type mold closing mechanism; 200, injection frame assembly; 300, dual injection unit; 400, electrical control box assembly; 500, inverted mold closing screw mechanism.

[0027] 1. Lower mold plate; 10. Mold closing guide rod; 11. First connecting rod shaft; 12. Second connecting rod shaft; 13. Third connecting rod shaft; 14. Fourth connecting rod shaft; 15. Fifth connecting rod shaft.

[0028] 2. Upper template; 21. Upper template plate; 22. Upper template sliding hole; 23. Support; 24. Mobility space; 25. Mobility hole; 26. Lower connecting rod hinge seat.

[0029] 3. Upper template; 31. Upper template sliding hole; 32. Screw assembly mounting hole; 33. Servo motor mounting bracket; 34. Crosshead mounting seat; 35. Mold closing guide rod hole; 36. Upper template guide rod hole; 37. Upper connecting rod hinge seat.

[0030] 4. Mold opening and closing machine column; 41. External thread of the machine column; 42. Mold adjusting nut pressure seat; 43. Pressure seat opening;

[0031] 5. Power components, 51. Servo motor, 52. Synchronous belt, 53. Motor shaft, 54. Injection pulley one, 55. Injection pulley two;

[0032] 6. Screw assembly; 61. Ball screw;

[0033] 7. Mold adjustment assembly; 71. Cycloidal motor; 72. Output shaft.

[0034] 73. Mold adjustment drive gear; 73-1. Mold adjustment pressing plate;

[0035] 74. Adjusting gear; 74-1. Gear body; 74-2. Gear pressure ring; 74-3. Adjusting gear fixing shaft; 74-4. Fixing shaft bearing; 74-5. Bearing sliding groove.

[0036] 75. Adjusting nut teeth; 76. Adjusting auxiliary teeth; 76-1. Auxiliary gear shaft;

[0037] 8. Mold closing screw fixing assembly; 81. Mold closing screw fixing sleeve; 82. Ball screw bearing; 83. Inner spacer; 84. Bearing pressure ring; 85. Screw nut.

[0038] 9. Crankshaft assembly; 91. Front connecting rod assembly; 92. Rear connecting rod assembly.

[0039] 93. Crosshead; 93-1. Hinge joint; 93-2. Guide head; 93-3. Hinge hole; 93-4. Crosshead guide rod hole;

[0040] 94. Upper link, 95. Middle link, 96. Lower link. Detailed Implementation

[0041] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. In the embodiments, "front and back" refers to the side facing the injection direction as the reference, and the side away from the injection direction as the back. "Up and down" refers to the vertical direction along the mold opening and closing direction.

[0042] Example 1:

[0043] exist Figure 1 , Figure 2 , Figure 3 In the illustrated embodiment, a vertical inverted rod type mold closing mechanism 100 includes a lower mold plate 1, an upper mold plate 2, and an upper-upper mold plate 3. The lower mold plate 1 is provided with multiple mold opening and closing machine columns 4, and the upper mold plate 2 is slidably disposed on the mold opening and closing machine columns 4. The upper-upper mold plate 3 is disposed at the upper end of the mold opening and closing machine columns 4.

[0044] An inverted mold-closing screw mechanism 500 for opening and closing the mold is provided on the upper mold plate 3. The inverted mold-closing screw mechanism 500 includes a mold-closing screw transmission assembly and a mold-adjusting assembly 7 for driving the upper mold plate to move up and down along the mold-opening and closing machine column. The mold-closing screw transmission assembly includes a screw assembly 6 and a crankshaft assembly 9. The crankshaft assembly 9 is hinged to both the upper mold plate 3 and the upper mold plate 2. The screw assembly 6 passes through the upper mold plate 3 and is connected to the crankshaft assembly 9. At the same time, the mold-adjusting assembly drives the upper mold plate and causes it to move up and down along the mold-opening and closing machine column, replacing the functions of the mold cylinder and seat cylinder in the prior art, and realizing precise and stable operation of mold opening and closing.

[0045] The mold clamping screw drive assembly further includes a power assembly 5, which includes a servo motor 51, an injection pulley 54 mounted on the servo motor 51, a second injection pulley 55 mounted on the screw assembly 6, and a synchronous belt 52 wound around the injection pulley 54 and the second injection pulley 55. The servo motor 51 rotates in both forward and reverse directions, driving the ball screw 61 to rotate, thereby driving the crankshaft assembly 9 and the upper mold plate 2 to move downward and upward.

[0046] The servo motor shaft 53 is provided with an injection pulley 54, and the lead screw assembly 6 is provided with an injection pulley 55. The synchronous belt 52 is wound around the injection pulley 54 and the injection pulley 55 to transmit power to the lead screw assembly 6.

[0047] The lead screw assembly 6 includes a ball screw 61 and a mold clamping lead screw fixing assembly 8 for connecting the ball screw to the upper mold plate. In other embodiments, the ball screw 61 may also adopt other lead screw structures, as long as the purpose of lead screw transmission can be achieved.

[0048] The mold clamping screw fixing assembly 8 includes a mold clamping screw fixing sleeve 81, a ball screw bearing 82, an inner spacer 83, a bearing pressure ring 84, and a screw nut 85. The ball screw 61 is rotatably mounted inside the mold clamping screw fixing sleeve 81 via the ball screw bearing 82. The mold clamping screw fixing sleeve 81 is fixed to the upper mold plate 3. The lower end of the ball screw 61 is connected to the crankshaft assembly 9 via the screw nut 85. In other embodiments, the screw nut may also adopt other structural shapes and is not limited to the structure in this embodiment.

[0049] like Figure 8 As shown, the crankshaft assembly 9 includes a front connecting rod assembly 91, a rear connecting rod assembly 92, and a crosshead 93. The crosshead includes two symmetrically arranged hinge joints 93-1 and two guide heads 93-2. The hinge joints 93-1 are provided with hinge holes 93-3, and the guide heads 93-2 are provided with crosshead guide rod holes 93-4.

[0050] The front link assembly 91 and the rear link assembly 92 are respectively hinged to the front and rear hinge joints 93-1 of the crosshead 93. The front link assembly 91 and the rear link assembly 92 respectively include an upper link 94, a middle link 95 and a lower link 96. Specifically, the upper link 94 and the lower link 96 are hinged to each other. The upper end of the upper link 94 is hinged to the upper template 3, the lower end of the lower link 96 is hinged to the upper template 2, one end of the middle link 95 is hinged to the upper link 94, and the other end of the middle link 95 is hinged to the hinge joint 93-1 on the crosshead.

[0051] The crankshaft assembly 9 can adopt other structural shapes and is not limited to the structure described in this embodiment. In other embodiments, it can also adopt a liver rod structure or a crank structure.

[0052] The upper mold plate 3 is provided with a crosshead mounting seat 34 extending downward and inward. The crosshead 93 is connected to the upper mold plate 3 through a mold guide post 10. The mold guide post 10 can slide up and down along the upper mold plate 3 to achieve a guiding function.

[0053] like Figure 4 As shown, the mold adjustment assembly 7 includes a cycloidal motor 71 and a gear transmission assembly; the cycloidal motor 71 is symmetrically arranged in two sets. The gear transmission assembly includes mutually meshing mold adjustment drive teeth 73, a mold adjustment large gear 74, a mold adjustment auxiliary gear 76, and a mold adjustment nut tooth 75.

[0054] The mold adjustment drive gear 73 is mounted on the output shaft of the cycloidal motor, the mold adjustment large gear 74 is coaxially mounted on the upper mold plate with the lead screw, the mold adjustment nut gear 75 is mounted on the mold opening and closing machine column 4, and the mold adjustment auxiliary gear 76 is mounted on the upper mold plate between the mold adjustment nut gear 75 and the mold adjustment large gear 74.

[0055] The cycloidal motor 71 is symmetrically arranged below the upper template 3, and the output shaft 72 of the cycloidal motor 71 is rotatably and vertically connected to the upper template 3 through the motor bearing 71-1. The upper end of the output shaft 72 of the cycloidal motor 71 is horizontally provided with the mold adjustment drive tooth 73. The mold adjustment drive tooth 73 is provided with a mold adjustment pressure plate 73-1 with a U-shaped structure. The mold adjustment pressure plate 73-1 realizes the pressing and protection of the mold adjustment drive tooth 73, and at the same time, it can ensure that the mold adjustment drive tooth 73 can mesh with the mold adjustment gear 74.

[0056] The mold-adjusting gear 74 is coaxially arranged with the ball screw 61 on the upper plate surface of the upper template 3. Specifically, the mold-adjusting gear 74 includes a gear body 74-1, a gear pressure ring 74-2, and several mold-adjusting gear fixing shafts 74-3, as well as a fixing shaft bearing 74-4 that realizes the rotational connection between the mold-adjusting gear fixing shafts 74-3 and the upper template 3.

[0057] The mold-adjusting gear fixing shaft 74-3 presses the large gear pressure ring 74-2 onto the upper template and achieves radial and axial limiting of the large gear body 74-1.

[0058] The inner side of the large gear body 74-1 is provided with a bearing sliding groove 74-5, and the fixed shaft bearing 74-4 is horizontally arranged on the mold adjustment gear fixed shaft 74-3 and slidably arranged inside the bearing sliding groove 74-5.

[0059] The large gear body 74-1 is pressed onto the upper template 3 by the large gear pressure ring 74-2 and can be driven to rotate along the fixed shaft bearing 74-4 by the mold adjustment drive gear 73.

[0060] Four mold-opening and closing machine columns 4 are symmetrically arranged front and rear. Each mold-opening and closing machine column 4 has an external thread 41 at its upper end. An adjusting nut tooth 75 is connected to the external thread 41. An adjusting nut pressure seat 42 is provided outside the adjusting nut tooth 75. The adjusting nut pressure seat 42 has a pressure seat opening 43 on the side facing the large gear body 74-1, so that the adjusting nut tooth 75 can be exposed and mesh with the adjusting auxiliary tooth 76. Each adjusting nut tooth 75 is provided on the upper template 3. A mold-adjusting auxiliary gear 76 is provided. The mold-adjusting auxiliary gear 76 is rotatably mounted on the upper mold plate 3 via an auxiliary gear shaft 76-1, so that the large gear body 74-1 meshes with the mold-adjusting auxiliary gear 76, and the mold-adjusting auxiliary gear 76 meshes with the mold-adjusting nut gear 75. This enables the motion of the large gear body 74-1 to be carried and transmitted to the mold-adjusting nut gear 75, thereby enabling the mold-adjusting nut gear 75 to drive the upper mold plate 3 to move up and down along the mold opening and closing machine column 4. Finally, it cooperates with the power assembly 5 and the lead screw assembly 6 to realize the mold opening and closing motion.

[0061] like Figure 5 As shown, the upper template 2 is a rectangular integrated structure. The upper template 2 includes an upper template plate 21 and an upper template sliding hole 22 provided on the upper template plate 21 for sliding of the mold opening and closing machine column 4. A support 23 is provided upward at the middle position of the upper template plate 21. An active space 24 is provided between the support 23 and the upper template plate 21. An active hole 25 is provided coaxially with the ball screw 61 at the center position of the support 23. A lower connecting rod hinge seat 26 is provided on the support 23 corresponding to the lower connecting rod 96. The lower end of the lower connecting rod 96 is hinged to the lower connecting rod hinge seat 26 through the fourth connecting rod shaft 14.

[0062] like Figure 6 , Figure 7 As shown, the upper template 3 is a rectangular integrated structure. A sliding hole 31 is provided on the upper template 3 corresponding to the mold opening and closing machine column 4. A screw assembly mounting hole 32 is provided at the center of the upper template 3. A servo motor mounting bracket 33 is provided on one side of the upper template 3. Crosshead mounting seats 34 are provided on both sides of the lower plate surface of the upper template 3, and mold closing guide rod holes 35 are provided on the crosshead mounting seats 34. A mold closing guide rod hole 36 is provided on the upper template 3 corresponding to the mold closing guide rod hole 32, and the mold closing guide rod 10 is movably inserted through the upper template guide rod hole 36.

[0063] The upper connecting rod 94 has a two-bar structure, and the lower connecting rod 96 has a three-bar structure. A crosshead limiting block is provided below the crosshead mounting base 34.

[0064] An upper connecting rod hinge seat 37 is provided on the lower plate surface of the upper template 3, and the upper end of the upper connecting rod 94 is hinged to the fifth connecting rod shaft 15.

[0065] The upper connecting rod 94 and the lower connecting rod 96 are hinged together by the first connecting rod shaft 11. One end of the middle connecting rod 95 is hinged to the upper connecting rod 94 by the second connecting rod shaft 12, and the other end of the middle connecting rod 95 is hinged to the crosshead 93 by the third connecting rod shaft 13. The crosshead guide rod holes 93-4 and the mold closing guide rod holes 35 at the other two cross ends of the crosshead 93 are stacked on top of each other to allow the mold closing guide rod 10 to pass through, so as to facilitate the up and down sliding of the mold closing guide rod 10, thereby realizing the guiding function in the mold opening and closing process.

[0066] The vertical inverted rod mold closing mechanism in the above embodiments is set in pairs during use, which can realize dual-mold operation and effectively improve production efficiency.

[0067] The specific mold closing process is as follows: the servo motor 51 works, driving synchronous motion, which in turn drives the ball screw 61 to rotate. The ball screw 61 moves downward, pressing the crankshaft assembly 9 and the upper mold plate 2 downward. At the same time, the cycloidal motor 71 works, driving the mold adjustment drive gear 73 to rotate, driving the mold adjustment large gear 74 to drive the mold adjustment auxiliary gear 76 and the mold adjustment nut gear 75 to rotate, thereby driving the upper mold plate 3 to move downward along the mold opening and closing machine column 4, thus making the entire upper mold plate 2 and the upper mold plate 3 move downward, realizing mold closing.

[0068] Mold opening process: The servo motor 51 reverses its operation, driving the ball screw 61 to rotate upward, pulling the upper mold plate 2 and crankshaft assembly 9 upward. At the same time, the cycloidal motor 71 operates, driving the mold adjustment drive gear 73 to rotate in the opposite direction, driving the mold adjustment large gear 74 to drive the mold adjustment auxiliary gear 76 and mold adjustment nut gear 75 to rotate, thereby driving the upper mold plate 3 to move upward along the mold opening and closing machine column 4, thus making the entire upper mold plate 2 and upper mold plate 3 move upward, realizing mold opening.

[0069] The vertical inverted rod mold clamping mechanism in the above embodiments replaces the original mold cylinder with a lead screw assembly and a crankshaft assembly. The lead screw drive is easy to automate and make intelligent. It integrates advanced control algorithms and sensors to achieve precise and fast control response, high stability, and long service life.

[0070] Traditional mold opening and closing methods use mold cylinders for mold opening. However, hydraulic oil is highly sensitive to temperature, resulting in poor stability and a short service life. Screw drives, on the other hand, are not limited by harsh environments such as low or high temperatures, offering high stability and a long service life.

[0071] By adopting an inverted design where the mold-closing mechanism is positioned on the upper mold plate, the worktable has more room to descend, meeting the user's on-site needs. Maintenance and repair costs are also lower. The crankshaft-driven structure is relatively simple, with fewer components and higher overall reliability, while traditional hydraulic transmission involves multiple hydraulic components and pipelines, increasing system failure points and maintenance difficulty. Furthermore, the high precision requirements for hydraulic components increase costs.

[0072] The large mold-adjusting gear 74 replaces the base cylinder, and four mold-adjusting auxiliary gears 76 and mold-adjusting nut teeth 75 are evenly distributed at the four corners of the upper mold plate 3 to achieve gear transmission. Compared with the traditional mold-closing mechanism that uses two base cylinders, the gear transmission is smoother, more stable, and has a longer service life.

[0073] Example 2:

[0074] exist Figure 9 In the illustrated embodiment, an injection molding machine with a vertical inverted rod type mold clamping mechanism includes two sets of the aforementioned vertical inverted rod type mold clamping mechanisms 100, an injection frame assembly 200, a dual injection unit 300 disposed on the injection frame assembly 200, and an electrical control box assembly 400.

[0075] The dual injection unit 300 is horizontally and parallelly arranged on the injection frame assembly 200, and the dual injection unit 300 includes injection unit one and injection unit two.

[0076] This injection molding machine, equipped with a vertical inverted rod clamping mechanism, replaces the original mold cylinder with a lead screw assembly and crankshaft assembly. The lead screw drive facilitates automation and intelligent operation, integrating advanced control algorithms and sensors to achieve precise and rapid control response, high stability, and long service life. The lead screw drive is not limited by harsh environments such as low or high temperatures, ensuring high stability and a long service life.

[0077] By adopting an inverted design where the mold-closing mechanism is mounted on the upper mold plate, the worktable has more room to descend, meeting the user's on-site needs. Maintenance and repair costs are lower; the crankshaft-driven structure is relatively simple, with fewer parts, higher overall reliability, and lower cost. A large mold-adjusting gear 74 replaces the base cylinder, and four mold-adjusting auxiliary gears 76 and mold-adjusting nut teeth 75 are evenly distributed at the four corners of the upper mold plate 3 to achieve gear transmission. Compared to the traditional mold-closing mechanism using two base cylinders, the gear transmission is smoother, more stable, and has a longer service life.

[0078] The above embodiments are only some embodiments of this utility model, and not all embodiments. Furthermore, based on the embodiments described in this utility model, all other embodiments obtained by those skilled in the art without creative effort and based on the technical solutions of this application should fall within the protection scope of this utility model.

Claims

1. A vertical inverted rod type mold closing mechanism, comprising a lower mold plate, a mold opening and closing machine column, an upper mold plate, and an upper-upper mold plate, characterized in that: An inverted mold closing screw mechanism (500) for opening and closing the mold is provided on the upper mold plate. The inverted mold closing screw mechanism (500) includes a mold closing screw transmission assembly and a mold adjustment assembly (7) for driving the upper mold plate to move up and down along the mold opening and closing machine column. The mold closing screw transmission assembly includes a screw assembly (6) and a crankshaft assembly (9). The crankshaft assembly is hinged to the upper mold plate and the upper mold plate respectively. The screw assembly (6) passes through the upper mold plate (3) and is connected to the crankshaft assembly (9).

2. The vertical inverted rod type mold closing mechanism according to claim 1, characterized in that: The lead screw assembly (6) includes a ball screw (61) and a mold clamping screw fixing assembly (8) for connecting the ball screw (61) to the upper template (3).

3. The vertical inverted rod type mold closing mechanism according to claim 2, characterized in that: The mold clamping screw fixing assembly (8) includes a mold clamping screw fixing sleeve (81) connected to the upper template (3), a ball screw bearing (82), and a screw nut (85) for connecting to the crankshaft assembly (9).

4. The vertical inverted rod type mold closing mechanism according to claim 1, characterized in that: The crankshaft assembly (9) includes a front connecting rod assembly (91), a rear connecting rod assembly (92), and a crosshead (93). The front connecting rod assembly (91) and the rear connecting rod assembly (92) respectively include an upper connecting rod (94), a middle connecting rod (95), and a lower connecting rod (96).

5. The vertical inverted rod type mold closing mechanism according to claim 4, characterized in that: The upper end of the upper connecting rod (94) is hinged to the upper template (3), the lower end of the upper connecting rod (94) is hinged to the upper end of the lower connecting rod (96), the lower end of the lower connecting rod (96) is hinged to the upper template (2), one end of the middle connecting rod (95) is hinged to the upper connecting rod (94), and the other end of the middle connecting rod (95) is hinged to the crosshead (93).

6. The vertical inverted rod type mold closing mechanism according to claim 4, characterized in that: The upper template (3) is provided with a crosshead mounting seat (34) extending downward and inward. The crosshead (93) is connected to the upper template (3) through a combined mold guide post (10).

7. The vertical inverted rod type mold clamping mechanism according to any one of claims 1 to 6, characterized in that: The mold clamping screw drive assembly (600) further includes a power assembly (5), which includes a servo motor (51), an injection pulley (54) mounted on the servo motor (51), a shooting pulley (55) mounted on the screw assembly (6), and a synchronous belt (52) wound around the injection pulley (54) and the shooting pulley (55).

8. The vertical inverted rod type mold clamping mechanism according to any one of claims 1 to 6, characterized in that: The mold adjustment assembly (7) includes a cycloidal motor (71) and a gear transmission assembly; two sets of the cycloidal motor (71) are symmetrically arranged.

9. The vertical inverted rod type mold closing mechanism according to claim 8, characterized in that: The gear transmission assembly includes a mold adjustment drive gear (73), a mold adjustment large gear (74), a mold adjustment auxiliary gear (76), and a mold adjustment nut gear (75) that mesh with each other. The mold adjustment drive gear (73) is set on the output shaft (72) of the cycloidal motor. The mold adjustment large gear (74) is coaxially set on the upper template (3) with the lead screw assembly. The mold adjustment nut gear (75) is set on the mold opening and closing machine column (4). The mold adjustment auxiliary gear (76) is set on the upper template (3) between the mold adjustment nut gear (75) and the mold adjustment large gear (74).

10. An injection molding machine, characterized in that: Includes the vertical inverted rod type mold closing mechanism as described in any one of claims 1 to 9.

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