Large bar drawing structure and method for die casting machine

Abstract

The invention provides a die-casting machine large bar drawing structure and method. The die-casting machine large bar drawing structure comprises a rack, and a fixed plate and a movable plate which are used for installing a die are sequentially arranged on the rack; one end of the fixed large bar is positioned outside the movable plate and mounted on the rack, and the other end is mounted outside the fixed plate; one end of the movable large bar is connected with the sliding end of the bar drawing device through the bar drawing locking device, and the other end is mounted on the outer side of the fixed plate; one end of the bar drawing device is installed on the movable plate, and the other end extends in the direction away from the fixed plate. According to the large bar drawing structure and method of the die casting machine, the bar drawing device is of a box type structure, the strength is high, and force needed for drawing the movable large bar can be stably provided; the drawing bar locking device is arranged to be used in cooperation with the drawing bar device, locking and loosening of the movable large bar are achieved, the drawing bar locking device is simple in structure and high in operation reliability, the jamming situation is avoided, the equipment failure rate is reduced, and maintainability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of die-casting machines, and in particular relates to a large-bar extraction structure and method for a die-casting machine. Background Art

[0002] In the application of large die-casting machines, the installation and removal of molds is a key link. When a large die-casting machine needs to handle a mold that exceeds its large bar spacing, a necessary step is to pull out the two large bars on the upper part of the die-casting machine to make enough installation space for the mold. However, for a two-plate die-casting machine, its movable plate and movable large bar will move relative to each other during operation. Therefore, the movable large bar cannot be fixedly connected to the large bar pulling device, but needs to be flexibly selected through a special locking device.

[0003] Traditional large-bar pulling and pulling devices generally rely on oil cylinders to provide the required pulling and pulling force. However, due to the long pulling distance of the movable large bar, the stroke of the rod pulling cylinder is very large. When the piston rod of the oil cylinder is extended to a longer state, its slender structure is prone to instability, which in turn affects the stability of pulling and pulling. In addition, the positioning accuracy of the oil cylinder is low, and oil leakage is prone to occur during use, which not only contaminates the workpiece, but also may have an adverse effect on the overall performance and production efficiency of the die-casting machine. Moreover, the traditional locking device is easy to get stuck when opening and closing, which is difficult to maintain, affecting the working efficiency and stability of the die-casting machine. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention aims to propose a die-casting machine large bar pulling structure and method, which solves the problems that the traditional large bar pulling device uses a cylinder to provide pulling force, the pulling is unstable, and the traditional locking device is easy to get stuck when opening and closing.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A die-casting machine lever structure, comprising a frame, a fixed plate, a movable plate, a fixed lever, a movable lever, a locking assembly, a lever locking device and a lever device, wherein a fixed plate and a movable plate for mounting a mold are sequentially arranged on the frame;

[0007] A group of locking components for locking the fixed large bar or the movable large bar are respectively arranged at the four corners of the outer side of the movable plate; one end of the fixed large bar is located outside the movable plate and is installed on the frame, and the other end passes through a group of locking components, the movable plate and the fixed plate located at the lower part of the movable plate in sequence, and is installed outside the fixed plate;

[0008] One end of the movable large bar is connected to the sliding end of the lever pulling device through a lever pulling locking device, and the other end passes through a group of locking components, the movable plate and the fixed plate on the upper part of the movable plate in sequence, and is installed on the outside of the fixed plate; one end of the lever pulling device is installed on the movable plate, and the other end extends away from the fixed plate. The movement of the sliding end of the lever pulling device drives the movable large bar to move.

[0009] Furthermore, the locking assembly includes a locking cylinder and a locking nut, one end of the locking cylinder is mounted on the movable plate, and the other end is mounted on the locking nut.

[0010] Furthermore, the locking nut includes a nut seat, a half nut and a locking cylinder. A pair of half nuts for locking a fixed large bar or a movable large bar are arranged in the nut seat. Each of the half nuts is connected to the telescopic end of a locking cylinder. The locking cylinder is installed on the outside of the nut seat.

[0011] Furthermore, a locking nut for locking the fixed large bar or the movable large bar is installed on the outer side of the fixing plate.

[0012] Furthermore, the lever-pulling device includes a base, a box, a motor and a screw. The base is installed on a movable plate, the box is installed on the base, a motor is provided on one side of the box, the output end of the motor is connected to the screw located in the box, a nut is provided on the screw, and the nut is connected to the lever-pulling locking device.

[0013] Furthermore, the lever-pulling locking device comprises a shell one, a locking cylinder two and a locking plate, wherein the shell one is slidably mounted on the movable large bar, and the upper part is connected to the sliding end of the lever-pulling device; the locking cylinder two is mounted on the outer side of the shell one, the telescopic end of the locking cylinder two is connected to the locking plate located inside the shell one, and the locking plate is used to clamp with the movable large bar.

[0014] Furthermore, the locking plate is a U-shaped plate, and the movable large bar is provided with an annular groove engaged with the locking plate. A wear-resistant plate is provided on the outer side of the locking plate.

[0015] Furthermore, the lever locking device includes a shell 2, a locking cylinder 3, a locking cylinder 4 and a clamping rod. The shell 2 is sleeved on the end of the movable large rod, and the upper part is connected to the sliding end of the lever pulling device; the locking cylinder 3 is installed on one side of the shell 2, the telescopic end of the locking cylinder 3 is connected to the locking cylinder 4, and the locking cylinder 4 is located in the sliding groove at the end of the shell 2; the telescopic end of the locking cylinder 4 is connected to one end of the clamping rod, and the other end of the clamping rod is located in the T-slot at the end of the movable large rod, and the telescopic end of the locking cylinder 4 contracts to make the clamping rod abut against the T-slot and lock it.

[0016] A method for drawing a large bar of a die-casting machine comprises the following steps:

[0017] S1. When the mold is hoisted into the die-casting machine, the lever-drawing device drives the lever-drawing locking device to move, so that the locking plate is aligned with the annular groove of the movable large bar, and the locking cylinder 2 is opened to push the locking plate to engage with the annular groove of the movable large bar, thereby locking the movable large bar;

[0018] S2, the outer side of the fixed plate and the movable large bar are loosened, the locking assembly on the outer side of the movable plate for locking the movable large bar is loosened, and the sliding end of the lever-drawing device moves through the lever-drawing locking device to drive the movable large bar to move away from the fixed plate; when the end of the movable large bar is retracted to 9-11 mm inside the movable plate, the sliding end of the lever-drawing device stops moving;

[0019] S3. When the mold is installed, the sliding end of the lever-pulling device moves to drive the movable large lever to pass through the fixed plate and lock with the outer side of the fixed plate. The locking assembly on the outer side of the movable plate for locking the movable large lever is locked to fix the movable large lever;

[0020] S4, open the locking cylinder 2, the telescopic end of the locking cylinder 2 contracts to separate the locking plate from the movable large bar, and loosen the movable large bar; the die-casting machine starts to work, and the movable plate drives the locking assembly, the lever locking device and the lever device to move along the fixed large bar and the movable large bar toward the fixed plate to perform mold closing die-casting.

[0021] A method for drawing a large bar of a die-casting machine comprises the following steps:

[0022] S1. When the mold is hoisted into the die-casting machine, the telescopic end of the locking cylinder 3 is extended so that the locking cylinder 4 and the clamping rod are located in the slide groove and the T-slot respectively, and the telescopic end of the locking cylinder 4 is contracted so that the clamping rod abuts against the inner wall of the T-slot, locking the movable large bar;

[0023] S3, the outer side of the fixed plate and the movable large bar are loosened, the locking assembly on the outer side of the movable plate for locking the movable large bar is loosened, and the sliding end of the lever-drawing device moves through the lever-drawing locking device to drive the movable large bar to move away from the fixed plate; when the end of the movable large bar is retracted to 9-11 mm inside the movable plate, the sliding end of the lever-drawing device stops moving;

[0024] S3. When the mold is installed, the sliding end of the lever-pulling device moves to drive the movable large lever to pass through the fixed plate and lock with the outer side of the fixed plate. The locking assembly on the outer side of the movable plate for locking the movable large lever is locked to fix the movable large lever;

[0025] S4. Open locking cylinder three. The telescopic end of locking cylinder three drives locking cylinder four. The clamping rod moves out of the T-slot of the movable large bar, and the movable large bar is released. The die-casting machine starts to work. The movable plate drives the locking assembly and the lever-drawing device to move along the fixed large bar and the movable large bar toward the fixed plate. At the same time, the lever-drawing device is turned on, driving the lever-drawing locking device to move in the opposite direction of mold closing, so that the lever-drawing locking device is consistent with the end of the movable large bar, and mold closing die-casting is performed.

[0026] Compared with the prior art, the die-casting machine large bar extraction structure and method described in the present invention have the following advantages:

[0027] (1) The structure and method for pulling out the movable large bar of the die-casting machine described in the present invention adopts a box-type structure for the pulling-out device, which has high strength and can stably provide the force required to pull out the movable large bar. A pulling-out locking device is provided for use in conjunction with the pulling-out device to achieve locking and loosening of the movable large bar. The pulling-out locking device has a simple structure and high operating reliability, and will not get stuck, thereby reducing the equipment failure rate and improving maintainability.

[0028] (2) The rod-pulling structure of the die-casting machine described in the present invention uses a motor-driven ball screw to achieve the pulling of the movable large rod. The ball screw structure is accurately positioned and is driven by a motor, so the energy consumption is low and there is no risk of oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of pulling out a movable lever provided in an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of the locking nut structure provided by an embodiment of the present invention;

[0033] Figure 4 A cross-sectional schematic diagram of a locking nut provided in an embodiment of the present invention;

[0034] Figure 5 A schematic diagram of a structure of a housing provided in an embodiment of the present invention;

[0035] Figure 6 A schematic cross-sectional view of a housing provided by an embodiment of the present invention;

[0036] Figure 7 A schematic diagram of a locking plate in a released state provided by an embodiment of the present invention;

[0037] Figure 8 A schematic diagram of a locking state of a locking plate provided in an embodiment of the present invention;

[0038] Fig. 9 A schematic diagram of the structure of the locking cylinder 2 provided in an embodiment of the present invention;

[0039] Fig.10 A schematic diagram of the structure of a second housing provided by an embodiment of the present invention;

[0040] Fig.11 A schematic diagram of a second cross-section of a housing provided by an embodiment of the present invention;

[0041] Fig.12 for Fig.11 Middle B is a partial enlarged view;

[0042] Fig.13 A schematic diagram of the movement of the locking oil cylinder 4 in the slide groove provided by an embodiment of the present invention;

[0043] Fig.14 A schematic diagram of the structure of a lever-drawing device provided in an embodiment of the present invention;

[0044] Fig.15 for Fig.13 A is a partial enlarged view.

[0045] Description of reference numerals:

[0046] 1. Frame; 2. Fixed plate; 3. Movable plate; 4. Fixed large bar; 5. Movable large bar; 51. T-slot; 6. Locking assembly; 61. Locking cylinder; 62. Locking nut; 621. Nut seat; 622. Half nut; 623. Locking cylinder one; 7. Lever locking device; 71. Shell one; 72. Locking cylinder two; 73. Locking plate; 74. Position sensor one; 75. Shell two; 751. Slide; 76. Locking cylinder three; 77. Locking cylinder four; 78. Clamping rod; 8. Lever device; 81. Base; 82. Box; 83. Motor; 84. Screw; 85. Double-row roller bearing; 9. Injection system. DETAILED DESCRIPTION

[0047] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0050] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0051] Embodiment 1:

[0052] like Figures 1 to 15 As shown, a die-casting machine lever structure includes a frame 1, a fixed plate 2, a movable plate 3, a fixed lever 4, a movable lever 5, a locking assembly 6, a lever locking device 7 and a lever device 8, wherein the frame 1 is sequentially provided with a fixed plate 2 and a movable plate 3 for mounting a mold;

[0053] A group of locking components 6 for locking the fixed large bar 4 or the movable large bar 5 are respectively arranged at the four corners of the outer side of the movable plate 3; one end of the fixed large bar 4 is located outside the movable plate 3 and is installed on the frame 1, and the other end passes through a group of locking components 6, the movable plate 3 and the fixed plate 2 located at the lower part of the movable plate 3 in sequence, and is installed outside the fixed plate 2;

[0054] One end of the movable large bar 5 is connected to the sliding end of the lever pulling device 8 through the lever pulling locking device 7, and the other end passes through a group of locking components 6, the movable plate 3 and the fixed plate 2 located on the upper part of the movable plate 3 in sequence, and is installed on the outside of the fixed plate 2; one end of the lever pulling device 8 is installed on the movable plate 3, and the other end extends in the direction away from the fixed plate 2. The movement of the sliding end of the lever pulling device 8 drives the movable large bar 5 to move.

[0055] In a preferred embodiment of the present invention, the locking assembly 6 includes a locking cylinder 61 and a locking nut 62. One end of the locking cylinder 61 is mounted on the movable plate 3, and the other end of the locking nut 62 is mounted.

[0056] The locking nut 62 includes a nut seat 621, a half nut 622 and a locking cylinder 623. A pair of half nuts 622 for locking and fixing the large bar 4 or the movable large bar 5 are arranged in the nut seat 621. Each of the half nuts 622 is connected to the telescopic end of a locking cylinder 623. The locking cylinder 623 is installed on the outside of the nut seat 621.

[0057] In actual use, when it is necessary to lock the fixed large bar 4 or the movable large bar 5, the external hydraulic system provides pressure to the locking oil cylinder 1 623, so that the telescopic end of the locking oil cylinder 1 623 pushes the half nut 622 to move toward the large bar, and the two paired half nuts 622 contact and lock the large bar to prevent the large bar from moving under high pressure. When it is necessary to loosen the large bar, the external hydraulic system releases pressure, the telescopic end of the locking oil cylinder 1 623 contracts, and the half nut 622 retreats accordingly, loosening the large bar.

[0058] The coordinated work of the locking nut 62 and the clamping cylinder 61 not only improves the performance and efficiency of the die-casting machine, but also enhances the safety of operation and the reliability of the equipment.

[0059] In a preferred embodiment of the present invention, a locking nut 62 for locking the fixed large bar 4 or the movable large bar 5 is installed on the outer side of the fixing plate 2 .

[0060] In actual use, the fixed plate 2 and the fixed large bar 4 or the movable large bar 5 are fixed and locked by the locking nut 62, which can realize the rapid locking and releasing of the large bar, thereby improving the working efficiency and production speed of the die-casting machine.

[0061] In a preferred embodiment of the present invention, the lever-pulling device 8 includes a base 81, a box 82, a motor 83 and a screw 84. The base 81 is installed on the movable plate 3, and the box 82 is installed on the base 81. A motor 83 is provided on one side of the box 82. The output end of the motor 83 is connected to the screw 84 located in the box 82. A nut is provided on the screw 84, and the nut is connected to the lever-pulling locking device 7.

[0062] In actual use, the motor 83 is a servo motor, the output end of the motor 83 is connected to the lead screw 84 through a coupling, and the lead screw 84 is connected to the end covers on both sides of the box body 82 through double-row roller bearings 85 to ensure smooth rotation. When the large rod is pulled, the output end of the motor 83 rotates to drive the lead screw 84 to rotate, so that the nut drives the rod pulling locking device 7 to move along the axial direction of the lead screw 84.

[0063] Embodiment 2

[0064] like Figures 5 to 9 As shown, in a preferred embodiment of the present invention, the lever locking device 7 includes a shell 71, a locking cylinder 72 and a locking plate 73. The shell 71 is slidably mounted on the movable large bar 5, and the upper part is connected to the sliding end of the lever pulling device 8; the locking cylinder 72 is installed on the outer side of the shell 71, and the telescopic end of the locking cylinder 72 is connected to the locking plate 73 located in the shell 71, and the locking plate 73 is used to clamp with the movable large bar 5.

[0065] The locking plate 73 is a U-shaped plate, and the movable large bar 5 is provided with an annular groove engaged with the locking plate 73. The outer side of the locking plate 73 is provided with a wear-resistant plate.

[0066] In actual use, a copper sleeve is provided in the shell 71, and a position sensor 74 is provided at the end of the shell 71 and the end of the movable large bar 5 respectively for detecting whether the ends of the two are aligned, thereby detecting whether the locking plate 73 is aligned with the annular groove at the end of the movable large bar 5.

[0067] During the rod extraction process of the die-casting machine, the rod extraction device 8 drives the housing 1 71 to move, so that the locking plate 73 is aligned with the annular groove of the movable large rod 5, and the locking cylinder 2 72 pushes the locking plate 73 to engage with the annular groove of the movable large rod 5, thereby locking the movable large rod 5.

[0068] When the die-casting machine is in mold closing state, the locking cylinder 2 72 contracts to drive the locking plate 73 and the movable large bar 5 to loosen, and the housing 1 71 moves axially along the movable large bar 5 along with the movable plate 3.

[0069] A method for drawing a large bar of a die-casting machine comprises the following steps:

[0070] S1. When the mold is hoisted into the die-casting machine, the lever-drawing device 8 drives the lever-drawing locking device 7 to move, so that the locking plate 73 is aligned with the annular groove of the movable large lever 5, and the locking cylinder 2 72 is opened to push the locking plate 73 to engage with the annular groove of the movable large lever 5, thereby locking the movable large lever 5;

[0071] S2, the locking nut 62 on the outer side of the fixed plate 2 for locking the movable large bar 5 is loosened, the locking assembly 6 on the outer side of the movable plate 3 for locking the movable large bar 5 is loosened, and the sliding end of the lever-drawing device 8 moves through the lever-drawing locking device 7 to drive the movable large bar 5 to move away from the fixed plate 2; when the end of the movable large bar 5 is retracted to 9-11 mm inside the movable plate 3, the sliding end of the lever-drawing device 8 stops moving;

[0072] S3. When the mold is installed, the sliding end of the lever device 8 moves to drive the movable large lever 5 to pass through the fixed plate 2 and the locking nut 62 on the outside of the fixed plate 2 for locking the movable large lever 5. The locking nut 62 is locked, and the locking assembly 6 on the outside of the movable plate 3 for locking the movable large lever 5 is locked to fix the movable large lever 5.

[0073] S4, open the locking cylinder 2 72, the telescopic end of the locking cylinder 2 72 contracts to separate the locking plate 73 from the movable large bar 5, and the movable large bar 5 is released; the die-casting machine starts to work, and the movable plate 3 drives the locking assembly 6, the lever locking device 7 and the lever device 8 to move along the fixed large bar 4 and the movable large bar 5 toward the fixed plate 2 to perform mold closing die-casting.

[0074] Embodiment 3

[0075] like Figures 10 to 13As shown, in a preferred embodiment of the present invention, the lever locking device 7 includes a shell 2 75, a locking cylinder 3 76, a locking cylinder 4 77 and a clamping rod 78, the shell 2 75 is sleeved on the end of the movable large bar 5, and the upper part is connected to the sliding end of the lever pulling device 8; the locking cylinder 3 76 is installed on one side of the shell 2 75, the telescopic end of the locking cylinder 3 76 is connected to the locking cylinder 4 77, and the locking cylinder 4 77 is located in the slide groove 751 at the end of the shell 2 75; the telescopic end of the locking cylinder 4 77 is connected to one end of the clamping rod 78, and the other end of the clamping rod 78 is located in the T-slot 51 at the end of the movable large bar 5, and the telescopic end of the locking cylinder 4 77 contracts to make the clamping rod 78 abut against the T-slot 51 and lock.

[0076] In actual use, one end of the clamping rod 78 is located in the T-slot 51 and is a T-block. The telescopic end of the locking cylinder three 76 drives the locking cylinder four 77 to move in the slide slot 751 at the end of the shell two 75, so that the locking cylinder four 77 drives the clamping rod 78 to move in the T-slot 51 at the end of the movable large bar 5. The telescopic end of the locking cylinder four 77 contracts to make the T-block of the clamping rod 78 abut against the inner wall of the T-slot 51, so that the drawer locking device 7 is locked with the movable large bar 5. The shell two 75 and the end of the movable large bar 5 are provided with a position sensor two for detecting whether the shell two 75 and the end of the movable large bar 5 are aligned. Through the position sensor two, the shell two 75 follows the movement of the end of the movable large bar 5 and keeps consistent with the end of the movable large bar 5.

[0077] During the rod withdrawal process of the die-casting machine, the rod withdrawal locking device 7 and the end of the movable large rod 5 remain in a locked state.

[0078] When the mold is closed, the telescopic end of the locking cylinder 3 76 drives the locking cylinder 4 77 and the clamping rod 78 to move out of the T-slot 51 of the movable large bar, so that the lever locking device 7 and the movable large bar 5 are loosened. During the mold closing process, the position sensor 2 controls the motor 83 to work, so that the lead screw 84 drives the nut and the housing 2 75 to move in the opposite direction of the mold closing, so that the lever locking device 7 and the end of the movable large bar 5 are consistent.

[0079] A method for drawing a large bar of a die-casting machine comprises the following steps:

[0080] S1. When the mold is hoisted into the die-casting machine, the telescopic end of the locking cylinder 3 76 is extended so that the locking cylinder 4 77 and the clamping rod 78 are located in the slide groove 751 and the T-slot 51 respectively, and the telescopic end of the locking cylinder 4 77 is contracted so that the clamping rod 78 abuts against the inner wall of the T-slot 51, thereby locking the movable large bar 5;

[0081] S3, the locking nut 62 on the outside of the fixed plate 2 for locking the movable large bar 5 is loosened, the locking assembly 6 on the outside of the movable plate 3 for locking the movable large bar 5 is loosened, and the sliding end of the lever-drawing device 8 moves through the lever-drawing locking device 7 to drive the movable large bar 5 to move away from the fixed plate 2; when the end of the movable large bar 5 is retracted to 9-11 mm inside the movable plate 3, the sliding end of the lever-drawing device 8 stops moving;

[0082] S3. When the mold is installed, the sliding end of the lever device 8 moves to drive the movable large lever 5 to pass through the fixed plate 2 and the locking nut 62 on the outside of the fixed plate 2 for locking the movable large lever 5. The locking nut 62 is locked, and the locking assembly 6 on the outside of the movable plate 3 for locking the movable large lever 5 is locked to fix the movable large lever 5.

[0083] S4, open the locking cylinder three 76, the telescopic end of the locking cylinder three 76 drives the locking cylinder four 77 and the clamping rod 78 to move out of the movable large bar T-slot 51, and loosens the movable large bar 5; the die-casting machine starts to work, the movable plate 3 drives the locking assembly 6 and the lever-drawing device 8 to move along the fixed large bar 4 and the movable large bar 5 toward the fixed plate 2, and at the same time the lever-drawing device 8 is opened, driving the lever-drawing locking device 7 to move in the opposite direction of the mold closing, so that the lever-drawing locking device 7 is consistent with the end of the movable large bar 5, and the mold closing die-casting is carried out.

[0084] Working principle of die casting machine pumping bar:

[0085] When the die-casting machine is lifting the mold into or out of the die-casting machine, the lever locking device 7 is locked with the movable large bar 5, the locking nut 62 on the outside of the fixed plate 2 for locking the movable large bar 5 is loosened, the locking assembly 6 on the outside of the movable plate 3 for locking the movable large bar 5 is loosened, the motor 83 works, the nut on the screw 84 drives the lever locking device 7 to move, and the lever locking device 7 drives the movable large bar 5 to move until the end of the movable large bar 5 retracts to 9-11 mm into the movable plate 3, and the motor 83 stops working.

[0086] After the mold is installed, the motor 83 reverses, the nut drives the lever locking device 7 to move, and the lever locking device 7 drives the movable large bar 5 to move until the movable large bar 5 passes through the locking nut 62 located on the outside of the fixed plate 2, locking the locking nut 62 and the corresponding locking assembly 6 located on the outside of the movable plate 3.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A die-casting machine draw bar structure, characterized in that: The machine comprises a frame (1), a fixed plate (2), a movable plate (3), a fixed large bar (4), a movable large bar (5), a locking assembly (6), a bar-drawing locking device (7) and a bar-drawing device (8), wherein the fixed plate (2) and the movable plate (3) for mounting the mold are sequentially arranged on the frame (1); A group of locking components (6) for locking the fixed large bar (4) or the movable large bar (5) are respectively arranged at the four corners of the outer side of the movable plate (3); one end of the fixed large bar (4) is located outside the movable plate (3) and is installed on the frame (1), and the other end passes through a group of locking components (6) located at the lower part of the movable plate (3), the movable plate (3) and the fixed plate (2) in sequence, and is installed on the outer side of the fixed plate (2); One end of the movable large bar (5) is connected to the sliding end of the lever-pulling device (8) through a lever-pulling locking device (7), and the other end passes through a group of locking components (6) located on the upper part of the movable plate (3), the movable plate (3) and the fixed plate (2) in sequence, and is installed on the outer side of the fixed plate (2); one end of the lever-pulling device (8) is installed on the movable plate (3), and the other end extends in a direction away from the fixed plate (2), and the movement of the sliding end of the lever-pulling device (8) drives the movable large bar (5) to move.

2. A die-casting machine draw-out structure according to claim 1, characterized in that: The locking assembly (6) comprises a mold locking cylinder (61) and a locking nut (62); one end of the mold locking cylinder (61) is mounted on the movable plate (3), and the other end is mounted on the locking nut (62).

3. A die-casting machine draw-out structure according to claim 2, characterized in that: The locking nut (62) comprises a nut seat (621), a half nut (622) and a locking cylinder (623). A pair of half nuts (622) for locking and fixing the large bar (4) or the movable large bar (5) are arranged in the nut seat (621). Each of the half nuts (622) is connected to the telescopic end of a locking cylinder (623). The locking cylinder (623) is installed on the outside of the nut seat (621).

4. A die-casting machine draw-out structure according to claim 3, characterized in that: A locking nut (62) for locking and fixing the large bar (4) or the movable large bar (5) is installed on the outer side of the fixing plate (2).

5. The die-casting machine draw-out structure according to claim 1, characterized in that: The lever-drawing device (8) comprises a base (81), a box (82), a motor (83) and a lead screw (84); the base (81) is mounted on the movable plate (3); the box (82) is mounted on the base (81); a motor (83) is provided on one side of the box (82); an output end of the motor (83) is connected to a lead screw (84) located in the box (82); a nut is provided on the lead screw (84); and the nut is connected to the lever-drawing locking device (7).

6. The die-casting machine draw-out structure according to claim 1, characterized in that: The lever-drawing locking device (7) comprises a shell (71), a locking cylinder (72) and a locking plate (73); the shell (71) is slidably mounted on the movable large lever (5), and the upper portion is connected to the sliding end of the lever-drawing device (8); the locking cylinder (72) is mounted on the outer side of the shell (71), the telescopic end of the locking cylinder (72) is connected to the locking plate (73) located in the shell (71), and the locking plate (73) is used to engage with the movable large lever (5).

7. The die-casting machine draw-out structure according to claim 6, characterized in that: The locking plate (73) is a U-shaped plate, the movable large bar (5) is provided with an annular groove engaged with the locking plate (73), and a wear-resistant plate is provided on the outer side of the locking plate (73).

8. The die casting machine draw bar structure according to claim 1, characterized in that: The lever locking device (7) comprises a second shell (75), a locking cylinder third (76), a locking cylinder fourth (77) and a clamping rod (78); the second shell (75) is sleeved on the end of the movable large lever (5), and the upper part is connected to the sliding end of the lever pulling device (8); a locking cylinder third (76) is installed on one side of the second shell (75), and the telescopic end of the locking cylinder third (76) is connected to the locking cylinder fourth (77), and the locking cylinder fourth (77) is located in the slide groove (751) at the end of the second shell (75); the telescopic end of the locking cylinder fourth (77) is connected to one end of the clamping rod (78), and the other end of the clamping rod (78) is located in the T-slot (51) at the end of the movable large lever (5), and the telescopic end of the locking cylinder fourth (77) contracts to make the clamping rod (78) abut against the T-slot (51) and lock.

9. A method for drawing a large rod using the large rod drawing structure of a die casting machine according to any one of claims 1 to 7, characterized in that: The steps include: S1. When the mold is hoisted into the die-casting machine, the lever-drawing device (8) drives the lever-drawing locking device (7) to move, so that the locking plate (73) is aligned with the annular groove of the movable large lever (5), and the locking cylinder 2 (72) is opened to push the locking plate (73) to engage with the annular groove of the movable large lever (5), thereby locking the movable large lever (5); S2, the outer side of the fixed plate (2) and the locking movable large bar (5) are released, the locking assembly (6) on the outer side of the movable plate (3) for locking the movable large bar (5) is released, and the sliding end of the lever-drawing device (8) moves through the lever-drawing locking device (7) to drive the movable large bar (5) to move away from the fixed plate (2); when the end of the movable large bar (5) is retracted to 9-11 mm inside the movable plate (3), the sliding end of the lever-drawing device (8) stops moving; S3. When the mold is installed, the sliding end of the lever-pulling device (8) moves to drive the movable large lever (5) to pass through the fixed plate (2) and is locked with the outer side of the fixed plate (2). The locking assembly (6) on the outer side of the movable plate (3) for locking the movable large lever (5) is locked to fix the movable large lever (5); S4, open the locking cylinder 2 (72), the telescopic end of the locking cylinder 2 (72) contracts to separate the locking plate (73) from the movable large bar (5), and release the movable large bar (5); the die-casting machine starts to work, and the movable plate (3) drives the locking assembly (6), the lever locking device (7) and the lever device (8) to move along the fixed large bar (4) and the movable large bar (5) toward the fixed plate (2), and the mold is closed for die-casting.

10. A method for drawing a large rod using the large rod drawing structure of a die casting machine according to any one of claims 1 to 5 and 8, characterized in that: The steps include: S1. When the mold is hoisted into the die-casting machine, the telescopic end of the locking cylinder three (76) is extended so that the locking cylinder four (77) and the clamping rod (78) are located in the slide groove (751) and the T-shaped groove (51) respectively, and the telescopic end of the locking cylinder four (77) is contracted so that the clamping rod (78) abuts against the inner wall of the T-shaped groove (51), thereby locking the movable large bar (5); S3, the outer side of the fixed plate (2) is released from the locking movable large bar (5), the locking assembly (6) on the outer side of the movable plate (3) for locking the movable large bar (5) is released, and the sliding end of the lever-drawing device (8) moves through the lever-drawing locking device (7) to drive the movable large bar (5) to move away from the fixed plate (2); when the end of the movable large bar (5) is retracted to 9-11 mm inside the movable plate (3), the sliding end of the lever-drawing device (8) stops moving; S3. When the mold is installed, the sliding end of the lever-pulling device (8) moves to drive the movable large lever (5) to pass through the fixed plate (2) and is locked with the outer side of the fixed plate (2). The locking assembly (6) on the outer side of the movable plate (3) for locking the movable large lever (5) is locked to fix the movable large lever (5); S4, open the locking cylinder three (76), the telescopic end of the locking cylinder three (76) drives the locking cylinder four (77) and the clamping rod (78) to move out of the T-slot (51) of the movable large bar, and loosen the movable large bar (5); the die-casting machine starts to work, the movable plate (3) drives the locking assembly (6) and the lever-drawing device (8) to move along the fixed large bar (4) and the movable large bar (5) toward the fixed plate (2), and at the same time the lever-drawing device (8) is opened, driving the lever-drawing locking device (7) to move in the opposite direction of the mold closing, so that the lever-drawing locking device (7) is consistent with the end of the movable large bar (5), and the mold closing die-casting is carried out.

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