Die closing device of large vertical squeeze casting machine

Abstract

The utility model relates to a mold closing device of a large vertical squeeze casting machine. The mold closing device comprises a mold system, a mold movement execution module and a mold movement balance module. The mold movement execution module comprises a mold closing oil cylinder and a mold closing cylinder seat plate; the mold movement balance module comprises a balance air cylinder, a fixing block, a high-pressure air storage tank, a pipeline connector and an air cylinder lock. The balance cylinder is fixedly mounted on the fixed block; and the fixed block is fixedly mounted on the mold closing cylinder seat plate. High-pressure gas storage tanks are fixedly mounted above the mold closing cylinder seat plate side by side; and a pipeline interface of the high-pressure gas storage tank is communicated with a rod cavity of the balance cylinder through a pipeline. According to the device, the balance cylinder is driven by the high-pressure air storage tank, and the balance cylinder provides pretension force for the movable template so as to balance partial weight of the movable template. Beneficial effects are that the weight of the movable template is balanced, a small-cylinder-diameter and low-power oil cylinder can be selected as a mold closing oil cylinder, and meanwhile, the mold opening response speed of the casting machine is also improved.

Description

Technical Field

[0001] The utility model relates to the field of die-casting machine equipment, and particularly relates to a die clamping device for a large vertical squeeze casting machine. Background Art

[0002] Squeeze casting is to pour liquid metal into the cavity of a mold, and make the molten metal crystallize and form under a large mechanical pressure, so as to obtain castings with few defects, high density, high strength and high precision. The die clamping and die opening of traditional squeeze casting machines are driven by die clamping cylinders. When clamping the die, a thrust is generated by the die clamping cylinder to drive the moving template to move towards the fixed template, so as to realize the closing and locking of the moving die and the fixed die. When opening the die, a pulling force is generated by the die clamping cylinder to drive the moving template to move in the opposite direction of the fixed template. However, the cylinder diameter of the die clamping cylinder of traditional squeeze casting machines is relatively large, resulting in a large volume and high cost of the die clamping cylinder. It not only easily causes waste of equipment space, but also a larger cylinder diameter of the die clamping cylinder requires a more powerful oil pump and more hydraulic oil to drive, resulting in a significant increase in system energy consumption.

[0003] In view of the deficiencies of the above traditional device solutions, the utility model proposes a die clamping device for a vertical squeeze casting machine, and achieves the technical effects of reducing the cylinder diameter of the die clamping cylinder, reducing the volume and energy consumption of the die clamping mechanism by setting a balance cylinder. Summary of the Utility Model

[0004] In order to improve the energy utilization efficiency, die clamping speed and die clamping stability of the die clamping action of a large vertical squeeze casting machine, the utility model proposes a die clamping energy-saving device for a vertical squeeze casting machine. The general scheme is to drive a balance cylinder by a high-pressure gas storage tank, and the latter provides the required pre-tension force for the moving template to balance a part of the weight of the moving template. Benefiting from the balance of the weight of the moving template, a die clamping cylinder with a small cylinder diameter and low power can meet the design requirements.

[0005] The specific solution of the present utility model is as follows: It includes a mold system, a mold movement execution module, and a mold movement balance module. The mold system includes a moving template, a fixed template, and tie bars. The moving template is located above the fixed template. There are 4 tie bars which are vertically installed on the bed of the vertical squeeze casting machine. The moving template moves vertically under the guidance of the tie bars. The mold movement execution module includes a mold closing cylinder and a mold closing cylinder seat plate. The mold closing cylinder seat plate is located above the tie bars. The mold closing cylinder is fixedly installed on the mold closing cylinder seat plate. The piston rod of the mold closing cylinder passes through the through hole on the mold closing cylinder seat plate and is connected to the moving template. The mold movement balance module includes a balance cylinder (balance cylinder piston rod), a fixed block, a high-pressure gas storage tank, a pipeline, and a gas cylinder lock. The balance cylinder is fixedly installed on the fixed block, and the fixed block is fixedly installed on the mold closing cylinder seat plate. The piston rod of the balance cylinder passes through the fixed block and the through hole on the mold closing cylinder seat plate in sequence and is connected to the moving template. 4 stop columns are symmetrically installed on the upper surface of the fixed block. The upper ends of the 4 stop columns are fixedly connected to a baffle plate. The balance cylinder is fixedly installed on the mold closing cylinder seat plate by the fixed block, the stop columns, and the baffle plate. A high-pressure gas storage tank is also fixedly installed side by side above the mold closing cylinder seat plate. The high-pressure gas storage tank is communicated with the rod chamber of the balance cylinder through a pipeline.

[0006] Compared with the prior art, the advantages of the present utility model are as follows:

[0007] Compared with the traditional mold closing mechanism, a balance cylinder and a high-pressure gas storage tank are provided to assist in mold opening, reducing the required cylinder diameter of the mold closing cylinder;

[0008] During the mold opening process, the balance cylinder can reduce impact and vibration and improve the accuracy of the mold opening movement;

[0009] 3) When the mold closing cylinder needs to act, the high-pressure gas storage tank can quickly release the stored energy, improving the response speed of the mold opening movement and the processing efficiency of the casting machine. Description of the Drawings

[0010] Figure 1 It is the overall schematic diagram of the device of the present utility model;

[0011] Figure 2 It is the front view schematic diagram of the device of the present utility model;

[0012] Figure 3 It is the top view schematic diagram of the device of the present utility model;

[0013] Figure 4 It is the side view schematic diagram of the device of the present utility model.

[0014] Description of the Reference Numerals:

[0015] 1. Balancing cylinder; 2. Die clamping oil cylinder; 3. High-pressure gas storage tank; 4. Die clamping cylinder seat plate; 5. Tie rod; 6. Moving platen; 7. Fixed platen; 8. Die clamping oil cylinder piston rod; 9. Balancing cylinder piston rod; 10. Pipeline interface; 11. Fixed block; 12. Stop post; 13. Baffle; 14. Gas cylinder lock; 15. Clamping lock stop block. Detailed implementation manners

[0016] In order to enable those skilled in the art of this technology to better understand the solution of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, rather than all the embodiments. Based on the embodiments in this utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this utility model.

[0017] It should be noted that the terms "first", "second", etc. in the description and claims of this utility model and the above-mentioned accompanying drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so as to describe the embodiments of this utility model here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0018] It should be noted that the terms used here are only for describing specific implementation manners, rather than intending to limit the exemplary implementation manners according to this application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0019] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0020] As Figures 1 to 4 shown, a die clamping device for a large vertical squeeze casting machine includes a mold system, a mold movement execution module, and a mold movement balance module. Among them, the role of the mold system is to form a cavity; the role of the mold movement execution module is to realize the die clamping and mold opening movements; the role of the mold movement balance module is to form a pre-tension force on the moving platen 6.

[0021] The mold system includes: a moving template 6, a stationary template 7, and tie bars 5.

[0022] The moving template 6 is located above the stationary template 7. There are 4 tie bars 5 in total, which are vertically installed on the bed of the vertical squeeze casting machine. The moving template 7 moves vertically under the guidance of the tie bars 5.

[0023] The mold movement execution module includes: a clamping cylinder 2 and a clamping cylinder base plate 4.

[0024] The clamping cylinder base plate 4 is located above the tie bars 5.

[0025] There are 2 clamping cylinders, which are fixedly installed on the clamping cylinder base plate 4. The clamping cylinder piston rod 8 of the clamping cylinder 2 passes through the through hole on the clamping cylinder base plate 4 and is connected to the moving template 6.

[0026] The mold movement balance module includes: a balance cylinder 1, a fixing block 11, a high-pressure gas storage tank 3, a pipeline interface 10, and a gas cylinder lock 14.

[0027] Preferably, there are 2 balance cylinders 1, which are fixedly installed on the fixing block 11, and the fixing block 11 is fixedly installed on the clamping cylinder base plate 4. The main benefit of setting two balance cylinders 1 is to form symmetrically distributed pre-tension forces on the moving template 6 and avoid generating radial forces on the tie bars 5.

[0028] The balance cylinder piston rod 9 of the balance cylinder 1 passes through the through holes on the fixing block 11 and the clamping cylinder base plate 4 in sequence and is connected to the moving template 6.

[0029] 4 retaining columns are symmetrically installed on the upper surface of the fixing block 11. The upper ends of the 4 retaining columns are fixedly connected to the baffle 13.

[0030] The balance cylinder 1 is fixedly installed on the clamping cylinder base plate 4 by the fixing block 11, the retaining columns 12, and the baffle 13. This structure is to improve the overall strength of the balance cylinder 1 and extend its service life.

[0031] 2 high-pressure gas storage tanks 3 are also fixedly installed side by side above the clamping cylinder base plate 4, and their relative positions are locked together by the gas cylinder lock 14. The function of this structure is to prevent collisions between the high-pressure gas storage tanks 3 and improve the safety of the high-pressure gas storage tanks 3.

[0032] The pipeline interface 10 of the high-pressure gas storage tank 3 is connected to the rodless cavity of the balance cylinder 1 through a pipeline.

[0033] Preferably, nitrogen is filled in the high-pressure gas storage tank, and the total pulling force generated by the 2 balance cylinders 1 is about 2 / 3 of the gravity of the moving template.

[0034] Preferably, there are 2 balance cylinders 2 in total, and they are arranged in pairs with the clamping cylinders 2;

[0035] Preferably, the number of the high-pressure gas storage tanks 3 is the same as that of the balance cylinders 1.

[0036] The working process of the present utility model is as follows:

[0037] (1) High-pressure nitrogen gas is filled into the high-pressure gas storage tank 3, waiting for the mold opening operation;

[0038] (2) When the previous squeeze casting process ends and the casting machine needs to perform the mold opening operation, first open the clamping locking blocks 15 corresponding to each tie bar 5, so that the moving template 6 can move vertically under the guidance of the tie bars;

[0039] (3) At the same time, open the air outlet valves of the two high-pressure gas storage tanks 3, nitrogen gas flows out from the pipeline interface 10, enters the rodless cavity of the balance cylinder 1 through the pipeline, and the balance cylinder piston rod 9 generates an upward pulling force on the moving template 6; however, since the resultant pulling force is less than the self-weight of the moving template 6, at this stage, the moving template 6 remains stationary;

[0040] (4) The hydraulic system drives the mold closing oil cylinder 2 to retract the mold closing oil cylinder piston rod 8, and the latter also generates an upward pulling force on the moving template 6; at this time, the resultant pulling force acting on the moving template 6 by the balance cylinder piston rod 9 and the mold closing oil cylinder piston rod 8 is greater than the self-weight of the moving template 6, and at this stage, the moving template 6 moves upward until the mold opening is completed.

[0041] Compared with the prior art, the advantages of this embodiment are as follows:

[0042] (1) The balance cylinder 1 is provided to assist in mold opening, reducing the cylinder diameter of the mold closing oil cylinder 2;

[0043] (2) Two balance cylinders 1 are provided, increasing the stress points during the mold opening process of the moving template 6, capable of reducing the impact and vibration during the mold opening process, and improving the accuracy of the mold opening movement;

[0044] (3) When the mold closing oil cylinder 2 acts, the high-pressure gas storage tank can quickly release the stored energy, improving the response speed of the mold opening movement and the processing efficiency of the casting machine.

[0045] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0046] For the sake of convenience of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used here to describe the spatial positional relationship of one device or feature to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the drawings of the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations should be made for the spatial relative descriptions used here.

[0047] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" etc. is generally based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be construed as limiting the protection scope of the present utility model; the orientation words "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0048] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A die-casting mold clamping device for a large vertical extrusion casting machine, characterized in that Including: A die system, a die movement execution module, and a die movement balance module; the die system includes a moving platen (6), a stationary platen (7), and tie bars (5); the moving platen (6) is located above the stationary platen (7); the die movement execution module includes a clamping cylinder (2) and a clamping cylinder base plate (4); the clamping cylinder base plate (4) is located above the tie bars (5); the clamping cylinder (2) is fixedly installed on the clamping cylinder base plate (4); the piston rod (8) of the clamping cylinder passes through the through hole on the clamping cylinder base plate (4) and is connected to the moving platen (6); the die movement balance module includes a balance cylinder (1), a fixed block (11), a high-pressure gas storage tank (3), a pipe interface (10), and a gas cylinder lock (14); the balance cylinder (1) is fixedly installed on the fixed block (11), and the fixed block (11) is fixedly installed on the clamping cylinder base plate (4); the piston rod (9) of the balance cylinder of the balance cylinder (1) passes through the through holes on the fixed block (11) and the clamping cylinder base plate (4) in sequence and is connected to the moving platen (6); 4 retaining columns (12) are symmetrically installed on the upper surface of the fixed block (11); the upper ends of the retaining columns (12) are fixedly connected to a baffle plate (13); a high-pressure gas storage tank (3) is also fixedly installed on the upper surface of the clamping cylinder base plate (4), and the pipe interface (10) of the high-pressure gas storage tank (3) is communicated with the rodless cavity of the balance cylinder (1) through a pipe.

2. The clamping device of a large vertical squeeze casting machine according to claim 1, characterized in that: There are 4 tie bars (5) in the die system, and they are vertically installed on the bed of the vertical squeeze casting machine; There are 2 clamping cylinders (2) in total; There are 2 balance cylinders (1) in total, and they are arranged in pairs with the clamping cylinders (2); The number of the high-pressure gas storage tanks (3) is the same as the number of the balance cylinders (1).

3. The die clamping device of a large vertical squeeze casting machine according to claim 1, characterized in that: The high-pressure gas storage tank (3) is filled with nitrogen.

4. A die-casting mold clamping device for a large vertical squeeze casting machine according to claim 2, characterized in that: The relative positions of the 2 high-pressure gas storage tanks (3) are locked by the gas cylinder lock (14).

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