Vertical clamping mechanism applied to die casting machine

Abstract

The utility model discloses a vertical mould locking mechanism applied to a die-casting machine, which belongs to the technical field of die-casting machines and comprises a lower mould plate, a movable mould plate and an upper mould plate which are sequentially arranged from bottom to top, a vertical tiebar sequentially penetrates through the lower mould plate, the movable mould plate and the upper mould plate, and the movable mould plate can move up and down in a reciprocating manner. A band-type brake assembly is arranged between the movable mold plate and the upper mold plate and used for locking or releasing the movable mold plate and the upper mold plate. The mold locking device is simple in structure, mold locking interference can be reduced, mold locking precision can be guaranteed, and mold locking stability is improved.

Description

Technical Field

[0001] The utility model belongs to the field of die-casting machines, and in particular relates to a vertical die-locking mechanism used in die-casting machines. Background Art

[0002] A die-casting machine is an industrial casting machine that hydraulically injects molten metal into a mold under pressure, cools it and forms it, and then opens the mold to obtain a solid metal casting. Die-casting machines can be divided into horizontal die-casting machines and vertical die-casting machines in terms of structure. At present, horizontal die-casting machines are technically mature and widely used. However, with the increase in application occasions, the demand for die-casting production in small and medium-sized enterprises has increased, but due to the large size of horizontal die-casting machines, they are less adaptable to small and medium-sized enterprises. The horizontal structure is inherently unable to make large-tonnage die-casting machines, mainly because the force acting on the large bar is unbalanced, it is difficult to overcome the difficulty in manufacturing large-diameter bars with twisting, it is difficult to ensure accuracy, and it is difficult to ensure dynamic and static conditions.

[0003] The invention application with publication number WO2022120641A1 relates to an injection system and a large-tonnage die-casting machine, including a three-cavity injection cylinder, a first power device, a second power device and a third power device. The three-cavity injection cylinder is provided with a first drive cavity, a second drive cavity and a third drive cavity. The first drive cavity is connected to the first power device, the second drive cavity is connected to the second power device, and the third drive cavity is connected to the third power device. A first piston is provided in the first drive cavity. The first power device is used to drive the first piston in the first drive cavity to move. The second power device is used to drive the second piston in the second drive cavity to move at a second speed. The third power device is used to drive the third piston in the third drive cavity to move at a third speed. The second speed is less than the third speed. The third drive cavity is located at the bottom of the three-cavity injection cylinder. By using the third drive cavity in the three-cavity injection cylinder to achieve high-speed drive while using the second drive cavity to achieve low-speed precision drive, the accuracy of the injection of the melt in the injection system is improved.

[0004] However, existing die-casting machines still have problems of poor precision and low stability during the clamping process, which affects work efficiency and the quality of die-castings. Utility Model Content

[0005] The utility model aims to provide a vertical mold locking mechanism with a simple structure for a die-casting machine, which can reduce mold locking interference, ensure mold locking accuracy and improve mold locking stability.

[0006] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0007] A vertical die-locking mechanism used in a die-casting machine comprises a lower die plate, a movable die plate and an upper die plate which are arranged in sequence from bottom to top, a vertically arranged coring column passes through the lower die plate, the movable die plate and the upper die plate in sequence, a die-casting die is arranged between the lower die plate and the movable die plate, and an injection mechanism can be arranged on both sides of the die-casting die for forming a die-casting part;

[0008] The movable template can move up and down, and a brake assembly is arranged between the movable template and the upper template for locking or releasing the movable template and the upper template.

[0009] By adopting the above technical solution, the die-casting machine is set as a vertical structure and can be equipped with a double-sided injection mechanism, which completely solves the problems of large space occupied by horizontal die-casting machines, low production efficiency and poor product quality of vertical die-casting machines.

[0010] According to an implementation mode of the utility model, the end surface of the movable template is configured with a positioning groove, and the end surface of the upper template is configured with a positioning boss. The positioning groove and the positioning boss are correspondingly arranged, and the positioning boss can be embedded in the positioning groove.

[0011] The brake assembly includes a fixed brake pad and a movable brake block, which are correspondingly arranged and both are arranged inside the positioning groove; the brake assembly also includes a brake cylinder, which can drive the brake block to move back and forth, making it close to or away from the brake pad, thereby clamping or releasing the positioning boss.

[0012] The locking or releasing of the moving die plate and the upper die plate is achieved through the cooperation of the brake assembly and the positioning boss, ensuring the normal operation of the die-casting machine. Due to the setting of the positioning boss and the positioning groove, the die-casting machine's die-locking action is completed between the moving die plate and the upper die plate, avoiding lateral interference, and ensuring the balance of force between the upper die plate and the moving die plate, which can improve the accuracy of the die-locking action, prevent the moving die plate from being stuck or offset during the movement and die-locking process, and improve the stability of the die-locking process.

[0013] According to an embodiment of the utility model, a plurality of positioning grooves are evenly dispersedly arranged on the outer edge of the movable template, the brake blocks in the plurality of brake assemblies operate synchronously, and the movement directions of the two brake blocks arranged relatively to each other are opposite;

[0014] The brake blocks and brake cylinders are matched one by one. The operation of the brake cylinders can drive the corresponding brake blocks to move back and forth, and the oil circuits of multiple brake cylinders are connected. In this way, the uniformity of the operation of multiple brake cylinders can be improved, and the synchronization of the operation of multiple brake blocks can be ensured, thereby improving the force balance of the mobile template and the upper template during the clamping process, avoiding the deflection of the mobile template caused by clamping, and further ensuring the accuracy of clamping.

[0015] According to an embodiment of the utility model, the notch of the positioning groove is provided with an annular gasket, and the annular gasket is fixedly connected to the movable template by bolts;

[0016] The positioning boss comprises a first base and a second base, the first base is connected to the upper template, and the second base is arranged opposite to the positioning groove;

[0017] A positioning flange is arranged on one side of the second base body facing the first base body. One side of the positioning flange is connected to the first base body through bolts, and the other side of the positioning flange is arranged corresponding to the annular gasket.

[0018] Furthermore, the annular gasket can be set to a flexible material, such as rubber, silicone, etc. In this way, when the positioning boss and the positioning groove cooperate to complete the clamping process of the movable template and the upper template, the friction between the end faces of the movable template and the upper template can be reduced, and buffering can be achieved during the bonding process of the two. The setting of the bolts can improve the structural stability and positional stability of the annular gasket, avoid excessive deformation of the annular gasket when it is bonded with the positioning flange on the positioning boss, thereby ensuring that the positioning boss is accurately embedded in the interior of the positioning groove, and the setting of the bolts can ensure the consistency of the deformation of multiple annular gaskets on the end face of the upper template during the clamping process, thereby avoiding defects such as the movable template tilting relative to the upper template during the clamping process.

[0019] According to one embodiment of the utility model, a step portion is arranged on the end face of the annular gasket facing the positioning flange. When the annular gasket cooperates with the positioning flange, the outer side of the end face of the annular gasket fits with the positioning flange, and a gap is formed between the inner side of the end face of the annular gasket and the positioning flange, and the gap is connected to the interior of the positioning groove.

[0020] Furthermore, the end surface of the positioning flange facing the annular gasket is also provided with a step portion, and the step portion is arranged corresponding to the step portion on the annular gasket.

[0021] The setting of the gap allows smooth airflow between the annular gasket and the positioning flange during the process of fitting the two, and can reduce the resistance when the two fit together. In addition, the corresponding step portions on the annular gasket and the positioning flange reduce the contact area when the two are fully fitted, which helps to reduce resistance in the process of ending clamping and separating the mobile template from the upper template, and improve the sensitivity of the clamping and releasing process and the smoothness of the operation process.

[0022] In addition, a gap is formed between the annular gasket and the positioning flange during the fitting process, and the gap is connected to the inside of the positioning groove, which also helps to ensure the balance of air pressure around the positioning boss during the clamping process and improve the stability of the clamping force.

[0023] According to an implementation mode of the utility model, a connecting groove is arranged on a side of the upper template facing the movable template, and a positioning boss is arranged inside the connecting groove; a through hole is arranged at the bottom of the connecting groove.

[0024] Thus, lubricating oil, coolant or gas can be introduced into the interior of the connecting groove through the through hole, so that the pressure inside the connecting groove can be adjusted, which helps to achieve the adjustment of the positioning boss.

[0025] According to an embodiment of the utility model, a first cavity is disposed inside the upper template, a plurality of second cavities are disposed around the periphery of the first cavity, a through hole is disposed between two adjacent second cavities, so that the plurality of second cavities are connected; and the through hole is not directly connected to the second cavity;

[0026] An ejector rod is movably arranged inside the first cavity, and an ejector plate is connected to the end of the ejector rod, and the ejector plate cooperates with the movable template.

[0027] Thus, the arrangement of the first cavity and the second cavity can reduce the deadweight of the upper mold plate, thereby reducing the design difficulty of the vertical die casting machine. The arrangement of the first cavity and the second cavity enables the upper mold plate to have sufficient buffer space, thereby improving its performance against external impact.

[0028] The setting of connecting the second cavities helps to maintain the stability of the air pressure inside the upper template, and the airflow flowing between multiple second cavities helps to balance the heat, that is, to reduce the temperature difference between different parts of the upper template and prevent the upper template from deformation due to local overheating.

[0029] The matching structure of the first cavity and the ejector rod can reduce the activity resistance of the ejector rod and the friction between the ejector rod and the upper mold plate during the reciprocating movement, which can reduce the wear rate on the one hand and reduce the generation of friction heat on the other hand, thereby avoiding deformation of the upper mold plate or abnormal movement of the ejector rod caused by local overheating. In addition, the use of the gas inside the first cavity helps to avoid the temperature difference between different parts of the ejector rod caused by friction, ensure the structural stability of the ejector plate, and prevent bending deformation.

[0030] According to an embodiment of the utility model, an open cavity is arranged on a side of the movable template facing the upper template, an ejector plate is arranged inside the open cavity, and an ejector rod can drive the ejector plate to move back and forth. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a die-casting machine according to Embodiment 1 of the present utility model;

[0032] Figure 2 It is a structural schematic diagram of a vertical clamping mechanism applied to a die-casting machine according to Embodiment 1 of the utility model;

[0033] Figure 3 for Figure 2 The schematic diagram of the assembly structure of the upper template and the movable template shown;

[0034] Figure 4 for Figure 3 A partial enlarged structural diagram of the middle A part;

[0035] Figure 5 for Figure 4 A schematic diagram of the partial enlarged structure of the middle B part;

[0036] Figure 6 for Figure 2 The structural schematic diagram of the upper template shown;

[0037] Figure 7 for Figure 2 A schematic diagram of the cross-sectional structure of the upper template shown;

[0038] Figure 8 for Figure 2 A schematic diagram of the cross-sectional structure of the upper template at another angle is shown.

[0039] Figure numbers: base 10; lower template 11; movable template 12; upper template 13; die-casting mold 14; Corinth column 15; ejector rod 16; ejector plate 17; injection mechanism 18; positioning groove 20; annular gasket 21; step portion 22; connecting groove 30; positioning boss 31; first base 32; second base 33; positioning flange 34; brake assembly 40; brake pad 41; brake block 42; brake cylinder 43; first cavity 51; second cavity 52; through hole 53; through hole 54. DETAILED DESCRIPTION

[0040] The technical solution of the utility model is further described in detail below in combination with the specific implementation mode and the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0041] Example 1

[0042] Figure 1 to Figure 8 The vertical clamping mechanism applied to a die-casting machine according to an embodiment of the utility model is schematically shown. As shown in the figure, the device involves a die-casting machine including a base 10, and a lower mold plate 11, a movable mold plate 12 and an upper mold plate 13 are arranged in sequence from bottom to top above the base 10, and the three are arranged horizontally, and the movable mold plate 12 is connected to the mold shifting cylinder. Under the drive of the mold shifting cylinder, the movable mold plate 12 can move back and forth up and down; the vertically arranged coring column 15 passes through the lower mold plate 11, the movable mold plate 12 and the upper mold plate 13 in sequence, and a die-casting mold 14 is arranged between the lower mold plate 11 and the movable mold plate 12, and a pressure-injection mechanism 18 can be arranged on both sides of the die-casting mold 14 for forming die-casting parts. The die-casting machine is arranged as a vertical structure and can be equipped with a double-sided pressure-injection mechanism 18, which completely solves the problems of large space occupation of horizontal die-casting machines, low production efficiency and poor product quality of vertical die-casting machines.

[0043] The vertical clamping mechanism used in the die-casting machine is arranged between the movable template 12 and the upper template 13 . A brake assembly 40 is arranged between the movable template 12 and the upper template 13 for locking or releasing the movable template 12 and the upper template 13 .

[0044] Specifically, the end face of the movable template 12 is configured with a positioning groove 20, and the side of the upper template 13 facing the movable template 12 is configured with a connecting groove 30, and a positioning boss 31 is provided inside the connecting groove 30; the positioning groove 20 is correspondingly arranged to the positioning boss 31, and the positioning boss 31 can be embedded in the positioning groove 20.

[0045] The brake assembly 40 includes a fixed brake pad 41 and a movable brake block 42. The brake pad 41 and the brake block 42 are arranged correspondingly and are both arranged inside the positioning groove 20; the brake assembly 40 also includes a brake cylinder 43, which can drive the brake block 42 to move back and forth, so that it approaches or moves away from the brake pad 41, thereby clamping or releasing the positioning boss 31.

[0046] The locking or releasing of the movable die plate 12 and the upper die plate 13 is achieved by the cooperation of the brake assembly 40 and the positioning boss 31, thereby ensuring the normal operation of the die casting machine. Due to the arrangement of the positioning boss 31 and the positioning groove 20, the die-casting machine's die-locking action is completed between the movable die plate 12 and the upper die plate 13, thereby avoiding lateral interference and ensuring the balance of force between the upper die plate 13 and the movable die plate 12, thereby improving the accuracy of the die-locking action, preventing the movable die plate 12 from being stuck or offset during the movement and die-locking process, and improving the stability of the die-locking process.

[0047] A plurality of positioning grooves 20 are evenly and dispersedly arranged on the outer edge of the movable template 12 . The brake blocks 42 in the plurality of brake assemblies 40 operate synchronously, and the movement directions of the two brake blocks 42 arranged opposite to each other are opposite.

[0048] The brake blocks 42 are matched with the brake cylinders 43 in a one-to-one manner. The operation of the brake cylinders 43 can drive the corresponding brake blocks 42 to move back and forth, and the oil circuits of multiple brake cylinders 43 are connected. In this way, the uniformity of the operation of multiple brake cylinders 43 can be improved, and the synchronization of the operation of multiple brake blocks 42 can be ensured, thereby improving the force balance of the mobile template 12 and the upper template 13 during the clamping process, avoiding the deflection of the mobile template 12 caused by clamping, and further ensuring the accuracy of clamping.

[0049] The notch of the positioning groove 20 is provided with an annular gasket 21, and the annular gasket 21 is fixedly connected to the movable template 12 by bolts; the positioning boss 31 includes a first base 32 and a second base 33, the first base 32 is connected to the upper template 13, and the second base 33 is arranged opposite to the positioning groove 20; the second base 33 is provided with a positioning flange 34 on the side facing the first base 32, one side of the positioning flange 34 is connected to the first base 32 by bolts, and the other side of the positioning flange 34 is arranged corresponding to the annular gasket 21.

[0050] Furthermore, the annular gasket 21 can be set to a flexible material, such as rubber, silicone, etc. In this way, when the positioning boss 31 cooperates with the positioning groove 20 to complete the clamping process of the movable template 12 and the upper template 13, the friction between the end faces of the movable template 12 and the upper template 13 can be reduced, and buffering can be achieved during the bonding process of the two. The setting of the bolts can improve the structural stability and positional stability of the annular gasket 21, and avoid excessive deformation of the annular gasket 21 when it is fitted with the positioning flange 34 on the positioning boss 31, thereby ensuring that the positioning boss 31 is accurately embedded in the interior of the positioning groove 20, and the setting of the bolts can ensure the consistency of the deformation of multiple annular gaskets 21 on the end face of the upper template 13 during the clamping process, thereby avoiding the movable template 12 from tilting relative to the upper template 13 during the clamping process.

[0051] A step portion 22 is arranged on the end face of the annular gasket 21 facing the positioning flange 34. When the annular gasket 21 cooperates with the positioning flange 34, the outer side of the end face of the annular gasket 21 fits against the positioning flange 34, and a gap is formed between the inner side of the end face of the annular gasket 21 and the positioning flange 34, and the gap is connected to the interior of the positioning groove 20.

[0052] Furthermore, a step portion 22 is also provided on the end surface of the positioning flange 34 facing the annular gasket 21 , and the step portion 22 is arranged corresponding to the step portion 22 on the annular gasket 21 .

[0053] The setting of the gap allows smooth airflow between the annular gasket 21 and the positioning flange 34 during the process of fitting the two, and can reduce the resistance when the two are fitting together. In addition, the step portions 22 corresponding to the annular gasket 21 and the positioning flange 34 reduce the contact area between the two when they are fully fitted, which helps to reduce resistance during the process of completing clamping and separating the movable template 12 from the upper template 13, thereby improving the sensitivity of the clamping and releasing processes and the smoothness of the operation process.

[0054] In addition, a gap is formed between the annular gasket 21 and the positioning flange 34 during the bonding process, and the gap is connected to the inside of the positioning groove 20, which also helps to ensure the balance of air pressure around the positioning boss 31 during the clamping process and improve the stability of the clamping force.

[0055] Furthermore, the upper template 13 is provided with a first cavity 51 inside, and a plurality of second cavities 52 are provided around the periphery of the first cavity 51, and a through hole 53 is provided between two adjacent second cavities 52, so that the plurality of second cavities 52 are connected and provided; an ejector rod 16 is movably provided inside the first cavity 51, and an ejector plate 17 is connected to the end of the ejector rod 16, and the ejector plate 17 cooperates with the movable template 12. The movable template 12 is provided with an open cavity on the side facing the upper template 13, and the ejector plate 17 is provided inside the open cavity, and the ejector rod 16 can drive the ejector plate 17 to move back and forth.

[0056] A through hole 54 is disposed at the bottom of the connecting groove 30 ; and the through hole 54 is not directly connected to the second cavity 52 .

[0057] Therefore, lubricating oil, coolant or gas can be introduced into the interior of the connecting groove 30 through the through hole 54 , so that the pressure inside the connecting groove 30 can be adjusted, which helps to achieve the adjustment of the positioning boss 31 .

[0058] Thus, the arrangement of the first cavity 51 and the second cavity 52 can reduce the weight of the upper mold plate 13, thereby reducing the design difficulty of the vertical die casting machine. The arrangement of the first cavity 51 and the second cavity 52 allows the upper mold plate 13 to have sufficient buffer space, thereby improving its performance against external impact.

[0059] The connection of the second cavities 52 helps to maintain the stability of the internal air pressure of the upper template 13, and the airflow flowing between the multiple second cavities 52 helps to balance the heat, that is, reduce the temperature difference between different parts of the upper template 13, and prevent the upper template 13 from deformation due to local overheating.

[0060] The matching structure of the first cavity 51 and the ejector rod 16 can reduce the movement resistance of the ejector rod 16 and the friction between the ejector rod 16 and the upper mold plate 13 during the reciprocating movement, which can reduce the wear rate on the one hand and reduce the generation of friction heat on the other hand, thereby avoiding deformation of the upper mold plate 13 or abnormal movement of the ejector rod 16 caused by local overheating. In addition, the use of the gas inside the first cavity 51 helps to avoid the temperature difference between different parts of the ejector rod 16 caused by friction, ensure the structural stability of the ejector plate 17, and prevent bending and deformation.

[0061] The conventional operations in the operating steps of the present invention are well known to those skilled in the art and will not be described in detail here.

[0062] The embodiments described above provide a detailed description of the technical solution of the utility model. It should be understood that the above is only a specific embodiment of the utility model and is not intended to limit the utility model. Any modifications, supplements or similar substitutions made within the scope of the principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A vertical clamping mechanism for a die-casting machine, comprising a lower die plate (11), a movable die plate (12) and an upper die plate (13) arranged in sequence from bottom to top, characterized in that: The movable template (12) is capable of moving up and down, and a brake assembly (40) is arranged between the movable template (12) and the upper template (13) for locking or releasing the movable template (12) and the upper template (13).

2. The vertical clamping mechanism for a die-casting machine according to claim 1, characterized in that: The end surface of the movable template (12) is provided with a positioning groove (20), and the end surface of the upper template (13) is provided with a positioning boss (31); the positioning groove (20) and the positioning boss (31) are arranged correspondingly, and the positioning boss (31) can be embedded in the positioning groove (20); The holding brake assembly (40) comprises a movable brake block (42), wherein the brake block (42) is arranged inside the positioning groove (20), and the reciprocating movement of the brake block (42) can achieve clamping or releasing of the positioning boss (31).

3. The vertical clamping mechanism for a die-casting machine according to claim 2, characterized in that: The plurality of positioning grooves (20) are evenly dispersedly arranged on the outer edge of the movable template (12), and the plurality of brake blocks (42) operate synchronously; The brake blocks (42) are matched with the brake oil cylinders (43) in a one-to-one correspondence, and the oil circuits of the plurality of brake oil cylinders (43) are connected.

4. The vertical clamping mechanism for a die-casting machine according to claim 2, characterized in that: The notch of the positioning groove (20) is provided with an annular gasket (21), and the annular gasket (21) is fixedly connected to the movable template (12) via bolts; The positioning boss (31) comprises a first base (32) and a second base (33), the first base (32) being connected to the upper mold plate (13), and the second base (33) being arranged opposite to the positioning groove (20); A positioning flange (34) is arranged on one side of the second base body (33) facing the first base body (32); one side of the positioning flange (34) is connected to the first base body (32) by bolts, and the other side of the positioning flange (34) is arranged corresponding to the annular gasket (21).

5. The vertical clamping mechanism for a die-casting machine according to claim 4, characterized in that: The end surface of the annular gasket (21) facing the positioning flange (34) is provided with a step portion (22); when the annular gasket (21) is matched with the positioning flange (34), the outer side of the end surface of the annular gasket (21) fits with the positioning flange (34), and a gap is formed between the inner side of the end surface of the annular gasket (21) and the positioning flange (34).

6. The vertical clamping mechanism for a die casting machine according to claim 4, characterized in that: A connecting groove (30) is arranged on a side of the upper template (13) facing the movable template (12); the positioning boss (31) is arranged inside the connecting groove (30); and a through hole (54) is arranged at the bottom of the connecting groove (30).

7. The vertical clamping mechanism for a die-casting machine according to claim 1, characterized in that: The upper mold plate (13) is provided with a first cavity (51) inside, and a plurality of second cavities (52) are arranged around the periphery of the first cavity (51), and the plurality of second cavities (52) are arranged in communication; An ejector rod (16) is movably arranged inside the first cavity (51), and an ejector plate (17) is connected to the end of the ejector rod (16), and the ejector plate (17) cooperates with the movable template (12).

8. The vertical clamping mechanism for a die-casting machine according to claim 7, characterized in that: An open cavity is arranged on a side of the movable template (12) facing the upper template (13); the ejector plate (17) is arranged inside the open cavity; and the ejector rod (16) is capable of driving the ejector plate (17) to move back and forth.

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