Top forming die of copper-aluminum composite needle type row-shaped piece

Abstract

The utility model relates to the technical field of metal profile processing, in particular to a top forming die for a copper-aluminum composite needle-type row-shaped piece, which comprises a lower die assembly, and the lower die assembly comprises a lower die mounting seat, a lower die plate and a lower die core; the upper die assembly comprises an upper die installation base, an upper die plate and an upper die core. The upper mold core and the lower mold core are enclosed to form a cavity, and the cavity comprises a first space for accommodating a solid copper substrate and semi-solid aluminum alloy liquid and a second space for forming a plurality of aluminum needle columns; the jacking mechanism comprises a plurality of jacking rods penetrating through the lower die core and a jacking driving mechanism, the jacking driving mechanism is used for driving the jacking rods to move up and down, and when the jacking driving mechanism drives the jacking rods to move upwards, the jacking rods drive the solid copper substrate to move upwards; and the solid copper substrate extrudes part of the semi-solid aluminum alloy liquid in the first space into the second space. Metallurgical bonding of a copper substrate and an aluminum substrate and forming of an aluminum needle column can be completed at a time, and production efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal profile processing, in particular to an upper molding die for a copper-aluminum composite pin-type row-shaped part. Background Art

[0002] Pin headers are widely used in electronic equipment, computer hardware, embedded systems and other fields to connect various modules, sensors, display screens and other components to the main control board. Pin headers can be classified according to their shape, size and arrangement. Common types include single-row pin headers, double-row pin headers, etc. In addition, pin headers have a variety of specifications to meet different application requirements. Pin headers have many advantages in heat dissipation, including efficient heat dissipation, space optimization, low-noise operation, long life and reliability, energy saving and environmental protection, and wide applicability. These characteristics make pin headers an important part of the heat dissipation solution for modern electronic equipment.

[0003] In the related art, application number CN202211214231.3 discloses a radiator and a vehicle, wherein the radiator includes a liquid cooling plate and a heat conducting plate, wherein the liquid cooling plate has a cooling cavity; the heat conducting plate includes a substrate and a plurality of pins, wherein the substrate includes a first surface and a second surface opposite to each other, wherein the first surface is provided with a plurality of spaced pins, and the second surface is used to provide the heat dissipation component to be dissipated. The heat conducting plate is made of copper-aluminum alloy, and its raw material components are composed of the following weight percentages: Al content 54%-54.7%, Cu content 45%-45.3%, Si content 0%-0.3%, Fe content 0%-0.3%, Zn content 0%-0.1%, Mn content 0%-0.1%, Ti content 0%-0.1%, and Mg content 0%-0.1%. Conventional heat-conducting plates are made of copper. This embodiment uses copper-aluminum alloy instead of copper. It is light in weight and has a density of 3.94g / cm3, which is only 44% of copper. It can reduce weight by more than 40%, reduce overall cost by about 15%, and achieve lightweight design. However, the heat-conducting plate has the following shortcomings in terms of process: the copper-aluminum composite rolled plate is produced by a semi-molten rolling composite method, followed by forging, cutting and processing. This series of process flows is relatively complex, and each step of the process requires precise control, otherwise it may affect the quality of the final product. The complex process flow may also lead to reduced production efficiency and increased production costs. In addition, during the rolling, forging and cutting process, scraps and waste may be generated, resulting in material waste, which not only increases production costs, but is also not conducive to environmental protection and sustainable development. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a top forming mold for a copper-aluminum composite needle-type row-shaped part, which is cleverly designed through the first space and the second space of the upper mold core and the lower mold core. The top driving mechanism drives the top rod to move upward, and the top rod drives the solid copper substrate to move upward. In this process, the copper substrate squeezes part of the semi-solid aluminum alloy liquid in the first space into the second space to form an aluminum needle column. The first space is used for the metallurgical combination of the copper substrate and the aluminum alloy liquid, and the second space is specifically used to form the aluminum needle column, which not only ensures the accuracy of the forming, but also improves the production efficiency. The mold can complete the metallurgical combination of the copper substrate and the aluminum substrate and the forming of the aluminum needle column at one time, greatly improving the production efficiency.

[0005] The first aspect of the utility model is to provide a top forming mold for a copper-aluminum composite pin-type row-shaped part, the top forming mold comprising:

[0006] A lower mold assembly, the lower mold assembly comprising a lower mold mounting seat, a lower mold plate and a lower mold core, the lower mold plate is mounted on the lower mold mounting seat, and the lower mold core is mounted on the lower mold plate;

[0007] An upper mold assembly, the upper mold assembly comprising an upper mold mounting seat, an upper mold plate and an upper mold core; the upper mold mounting seat is mounted on the lower mold mounting seat, the upper mold plate is mounted on the upper mold mounting seat, and the upper mold core is mounted on the upper mold plate;

[0008] The upper mold core and the lower mold core are enclosed to form a mold cavity, which includes a first space for accommodating a solid copper substrate and a semi-solid aluminum alloy liquid and a second space for forming a plurality of aluminum needle columns;

[0009] An upper ejection mechanism is installed on the lower mold mounting seat, and the upper ejection mechanism includes a plurality of ejector rods penetrating the lower mold core and an upper ejection driving mechanism, and the upper ejection driving mechanism is used to drive the ejector rods to move up and down in the height direction relative to the lower mold core. When the upper ejection driving mechanism drives the ejector rods to move upward, the ejector rods drive the solid copper substrate to move upward, so that the solid copper substrate squeezes part of the semi-solid aluminum alloy liquid in the first space into the second space.

[0010] In the first aspect of the utility model, as a preferred embodiment, it also includes a heating component, which is embedded in the upper mold core and / or the lower mold core, and the heating component is used to heat the upper mold core and / or the lower mold core to achieve heating of the workpiece to be formed by heat conduction.

[0011] In the first aspect of the utility model, as a preferred embodiment, the heating assembly includes a plurality of electric heating tubes evenly distributed inside the upper mold core and the lower mold core.

[0012] In the first aspect of the utility model, as a preferred embodiment, a recessed portion is formed on the upper surface of the lower mold core, a raised portion is formed on the bottom surface of the upper mold core extending downward, and a plurality of needle-column-shaped through holes arranged at intervals are provided at positions corresponding to the raised portions on the upper mold core; the first space is formed by the raised portion and the recessed portion, and the second space is formed by a plurality of needle-column-shaped through holes respectively connected to the first space.

[0013] In the first aspect of the utility model, as a preferred embodiment, the upper push driving mechanism includes an upper push electric cylinder, a first lifting plate connected to the output shaft of the upper push electric cylinder, and a first locking block. A plurality of push rods are inserted into a preset mounting hole on the first lifting plate. The lower end of the push rod is provided with a limiting flange placed under the first lifting plate and abutting against the first lifting plate. The first locking block is fixed to the first lifting plate by a first bolt and cooperates with the first lifting plate to clamp and fix the limiting flange; the upper push electric cylinder drives the first lifting plate to move upward in the height direction, and the first lifting plate drives the push rod to move upward in the height direction relative to the lower mold core, and the solid copper base plate is driven by the push rod to move upward, so that the solid copper base plate squeezes part of the semi-solid aluminum alloy liquid in the first space into the second space.

[0014] In the first aspect of the utility model, as a preferred embodiment, it also includes a pressing mechanism, which includes a plurality of ejector pins passing through the upper mold core and a pressing drive mechanism, and the plurality of ejector pins are connected one by one in the plurality of needle-column-shaped through holes, and the pressing drive mechanism is used to drive the ejector pins to move up and down in the height direction relative to the upper mold core, so that part of the ejector pins moves up and down in the needle-column-shaped through holes, so as to adjust the height of the semi-solid aluminum alloy liquid in the second space and seal the upper end of the needle-column-shaped through holes.

[0015] In the first aspect of the utility model, as a preferred embodiment, the downward pressure drive mechanism includes a downward pressure electric cylinder, a second lifting plate connected to the output shaft of the downward pressure electric cylinder, and a second locking block, a plurality of ejectors are inserted into preset mounting holes on the second lifting plate, and the upper end of the ejector is provided with a limiting flange placed under the second lifting plate and abutting against the second lifting plate, the second locking block is fixed to the second lifting plate by a second bolt and cooperates with the second lifting plate to clamp and fix the limiting flange.

[0016] In the first aspect of the present utility model, as a preferred embodiment, the ejector pin and the needle-shaped through hole form an exhaust gap, and the diameter of the exhaust gap is 3-6 microns.

[0017] In the first aspect of the utility model, as a preferred embodiment, it also includes a pressure sensor, which is embedded in the upper mold core and / or the lower mold core, and is used to detect the pressure in the cavity.

[0018] In the first aspect of the utility model, as a preferred embodiment, it also includes a temperature sensor, which is embedded in the upper mold core and / or the lower mold core, and is used to detect the temperature in the cavity.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In the practical application process of the top forming mold of the copper-aluminum composite pin-shaped row of parts of the utility model, a solid copper substrate is placed in the first space of the cavity, a semi-solid aluminum alloy liquid is injected into the cavity, filled on the copper substrate, and then the mold is closed. The top mechanism is started, and the top driving mechanism drives the ejector rod to move upward, and the ejector rod drives the solid copper substrate to move upward. In this process, the copper substrate squeezes part of the semi-solid aluminum alloy liquid in the first space into the second space to form an aluminum needle column. After a period of cooling, the copper-aluminum composite pin-shaped row of parts reaches sufficient strength, and the mold can be opened at this time, and then the molded product can be ejected from the first space by the top mechanism to complete the demoulding operation. In this process, the copper substrate squeezes part of the semi-solid aluminum alloy liquid in the first space into the second space to form an aluminum needle column, the first space is used for the metallurgical combination of the copper substrate and the aluminum alloy liquid, and the second space is specifically used to form the aluminum needle column, which not only ensures the accuracy of the molding, but also improves the production efficiency. The mold can complete the metallurgical combination of the copper substrate and the aluminum substrate and the molding of the aluminum needle column at one time, greatly improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the top forming mold of the utility model;

[0022] Figure 2 It is a cross-sectional view of the top forming mold of the utility model;

[0023] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of the A part;

[0024] Figure 4 It is a structural schematic diagram of the lower mold assembly, upper mold assembly, upper push mechanism and lower pressing mechanism of the utility model;

[0025] Figure 5 It is a cross-sectional view of the lower mold assembly, the upper mold assembly, the upper push mechanism and the lower pressing mechanism of the utility model;

[0026] Figure 6 It is a schematic structural diagram of the copper-aluminum composite pin-type row-shaped component of the utility model.

[0027] In the figure: 10, lower mold assembly; 11, lower mold mounting seat; 12, lower mold plate; 13, lower mold core; 131, recessed portion; 20, upper mold assembly; 21, upper mold mounting seat; 22, upper mold plate; 23, upper mold core; 231, raised portion; 232, needle-shaped through hole; 30, cavity; 31, first space; 32, second space; 40, upper ejection mechanism; 41, ejector rod; 42, upper ejection drive mechanism; 421, upper ejection electric cylinder output shaft; 422. First lifting plate; 423. First locking block; 50. Heating assembly; 51. Electric heating tube; 60. Pressing mechanism; 61. Ejector pin; 62. Pressing drive mechanism; 621. Pressing electric cylinder output shaft; 622. Second lifting plate; 623. Second locking block; 70. Pressure sensor; 80. Temperature sensor; 90. Copper-aluminum composite needle-type row piece; 91. Copper base plate; 911. Dovetail groove; 92. Aluminum base plate; 93. Aluminum needle column. DETAILED DESCRIPTION

[0028] Below, in conjunction with the accompanying drawings and specific embodiments, the utility model is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except for special instructions, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0030] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Please refer to Figure 1-6 As shown, this embodiment provides a top forming mold for a copper-aluminum composite pin-type row-shaped part 90, including a lower mold assembly 10, an upper mold assembly 20 and a top mechanism 40;

[0033] Specifically, the lower mold assembly 10 includes a lower mold mounting seat 11, a lower mold plate 12 and a lower mold core 13, the lower mold plate 12 is mounted on the lower mold mounting seat 11, and the lower mold core 13 is mounted on the lower mold plate 12;

[0034] Specifically, the upper mold assembly 20 includes an upper mold mounting seat 21, an upper mold plate 22 and an upper mold core 23; the upper mold mounting seat 21 is mounted on the lower mold mounting seat 11, the upper mold plate 22 is mounted on the upper mold mounting seat 21, and the upper mold core 23 is mounted on the upper mold plate 22;

[0035] The upper mold core 23 and the lower mold core 13 are enclosed to form a mold cavity 30, and the mold cavity 30 includes a first space 31 for accommodating a solid copper substrate 91 and a semi-solid aluminum alloy liquid and a second space 32 for forming a plurality of aluminum needle columns 93;

[0036] Specifically, the upper ejection mechanism 40 is installed on the lower mold mounting base 11, and the upper ejection mechanism 40 includes a plurality of ejector rods 41 penetrating the lower mold core 13 and an upper ejection driving mechanism 42. The upper ejection driving mechanism 42 is used to drive the ejector rods 41 to move up and down in the height direction relative to the lower mold core 13. When the upper ejection driving mechanism 42 drives the ejector rods 41 to move upward, the solid copper substrate 91 is driven by the ejector rods 41 to move upward, so that the solid copper substrate 91 squeezes part of the semi-solid aluminum alloy liquid in the first space 31 into the second space 32.

[0037] In the present invention, the copper-aluminum composite pin-type row-shaped member 90 includes a substrate, which includes a copper substrate 91 and an aluminum substrate 92 metallurgically bonded to the surface of the copper substrate 91; a plurality of aluminum pins 93 arranged at intervals are formed on the aluminum substrate 92. Preferably, a plurality of dovetail grooves 911 distributed at intervals are formed on the upper surface of the copper substrate 91.

[0038] On the basis of the above structure, in the actual application process, the upper mold assembly 20 is lifted by means of an external lifting device, the solid copper substrate 91 is placed in the first space 31 of the cavity 30, the semi-solid aluminum alloy liquid is injected into the cavity 30, and filled on the copper substrate 91, and then the upper mold assembly 20 is lowered by the external lifting device to complete the mold closing. The upper ejection mechanism 40 is started, and the upper ejection drive mechanism 42 drives the ejector rod 41 to move upward, and the ejector rod 41 drives the solid copper substrate 91 to move upward. In this process, the copper substrate 91 squeezes part of the semi-solid aluminum alloy liquid in the first space 31 into the second space 32 to form an aluminum needle column 93. After a period of cooling, the copper-aluminum composite needle-type row-shaped part 90 reaches sufficient strength, and the mold can be opened at this time, and then the molded product can be ejected from the first space 31 by the upper ejection mechanism 40 to complete the demolding operation. In this process, the copper substrate 91 squeezes part of the semi-solid aluminum alloy liquid in the first space 31 into the second space 32 to form the aluminum needle column 93. The first space 31 is used for metallurgical bonding of the copper substrate 91 and the aluminum alloy liquid, while the second space 32 is specifically used to form the aluminum needle column 93, which not only ensures the accuracy of molding, but also improves production efficiency. The mold can complete the metallurgical bonding of the copper substrate 91 and the aluminum substrate 92 and the molding of the aluminum needle column 93 at one time, greatly improving production efficiency.

[0039] In a preferred embodiment of the present invention, a heating component 50 is further included. The heating component 50 is embedded in the upper mold core 23 and / or the lower mold core 13. The heating component 50 is used to heat the upper mold core 23 and / or the lower mold core 13, thereby heating the workpiece to be formed by heat conduction.

[0040] On the basis of the above structure, the mold is heated by the heating component 50, and the heating component 50 maintains a suitable temperature to ensure that the aluminum alloy liquid maintains good fluidity and ensures that the copper substrate 91 and the aluminum alloy liquid can reach a suitable temperature during metallurgical bonding, thereby improving the copper-aluminum composite effect and ensuring the quality and performance of the product.

[0041] Preferably, the heating assembly 50 includes a plurality of electric heating tubes 51 evenly distributed inside the upper mold core 23 and the lower mold core 13. This can ensure uniformity and accuracy of mold heating, thereby improving product quality and production efficiency, and can also effectively avoid damage to the mold due to local overheating, thereby extending the service life of the mold.

[0042] In a preferred embodiment of the utility model, a recessed portion 131 is formed on the upper surface of the lower mold core 13, a raised portion 231 is formed on the bottom surface of the upper mold core 23 extending downward, and a plurality of needle-column-shaped through holes 232 arranged at intervals are provided at positions corresponding to the raised portions 231 on the upper mold core 23; the first space 31 is formed by the raised portions 231 and the recessed portion 131, and the second space 32 is formed by a plurality of needle-column-shaped through holes 232 respectively connected to the first space 31.

[0043] On the basis of the above structure, the concave portion 131 of the lower mold core 13 cooperates with the convex portion 231 of the upper mold core 23 to accurately position and fix the copper substrate 91, ensuring that the copper substrate 91 will not move or misalign during the molding process. This design not only improves the precision of the product, but also ensures the stability of the molding process. The needle-shaped through holes 232 provided on the upper mold core 23 correspond to the convex portions 231, and these through holes play a key role in the molding process. They not only form spaces for the aluminum needle columns 93, but also ensure that the aluminum alloy liquid can flow into these spaces evenly and accurately, thereby forming precise aluminum needle columns 93.

[0044] In a preferred embodiment of the present invention, the upper push driving mechanism 42 includes an upper push electric cylinder, a first lifting plate 422 connected to the output shaft 421 of the upper push electric cylinder, and a first locking block 423. A plurality of push rods 41 are inserted into a preset mounting hole on the first lifting plate 422. The lower end of the push rod 41 is provided with a limiting flange placed below the first lifting plate 422 and abutting against the first lifting plate 422. The first locking block 423 is fixed to the first lifting plate 422 by a first bolt and cooperates with the first lifting plate 422 to clamp and fix the limiting flange; the upper push electric cylinder drives the first lifting plate 422 to move upward in the height direction, and the first lifting plate 422 drives the push rod 41 to move upward in the height direction relative to the lower mold core 13. The push rod 41 drives the solid copper substrate 91 to move upward, so that the solid copper substrate 91 squeezes part of the semi-solid aluminum alloy liquid in the first space 31 into the second space 32.

[0045] On the basis of the above structure, the upper electric cylinder starts to work, driving the first lifting plate 422 to move upward in the height direction. The upward movement of the first lifting plate 422 drives the ejector rod 41 connected in the mounting hole to move upward together. Since the limiting flange at the lower end of the ejector rod 41 is tightly fixed by the first lifting plate 422 and the first locking block 423, the ejector rod 41 can stably and accurately transmit the movement of the first lifting plate 422. As the ejector rod 41 rises, they begin to contact the solid copper substrate 91 and push it to move upward. In this process, the solid copper substrate 91 squeezes part of the semi-solid aluminum alloy liquid in the first space 31 into the second space 32. When the first lifting plate 422 and the ejector rod 41 reach the preset height, the upper electric cylinder stops working and completes an extrusion action. At this time, the extruded semi-solid aluminum alloy liquid has formed the desired shape or structure in the second space 32. Through this design, the upper driving mechanism 42 can achieve efficient and accurate extrusion operation, and at the same time, the stability and reliability of the mechanism are also effectively guaranteed. When the push rod 41 is deformed or otherwise damaged, the bolts fixing the first locking block 423 and the first lifting plate 422 can be loosened to disassemble the push rod 41 so as to replace it with a new one.

[0046] In a preferred embodiment of the utility model, it also includes a pressing mechanism 60, which includes a plurality of ejector pins 61 penetrating the upper mold core 23 and a pressing drive mechanism 62. The plurality of ejector pins 61 are connected one by one to the plurality of needle-column-shaped through holes 232. The pressing drive mechanism 62 is used to drive the ejector pins 61 to move up and down along the height direction relative to the upper mold core 23, so that part of the ejector pins 61 moves up and down in the needle-column-shaped through holes 232, so as to adjust the height of the semi-solid aluminum alloy liquid in the second space 32 and seal the upper end of the needle-column-shaped through holes 232.

[0047] On the basis of the above structure, during the processing, the semi-solid aluminum alloy liquid is injected into the specific space of the mold. The pressing mechanism 60 can indirectly affect the distribution and height of the semi-solid aluminum alloy liquid in the second space 32 by controlling the position of the ejector pin 61 in the needle-column-shaped through hole 232. When the ejector pin 61 moves downward under the action of the pressing drive mechanism 62, it will increase the extrusion of the aluminum alloy liquid in the second space 32, so that the height of the aluminum alloy liquid decreases; conversely, when the ejector pin 61 moves upward, it will reduce the extrusion of the aluminum alloy liquid, thereby increasing the height of the aluminum alloy liquid. Another important function of the ejector pin 61 is to block the upper end of the needle-column-shaped through hole 232. By moving the ejector pin 61 to the upper end of the needle-column-shaped through hole 232, the ejector pin 61 can effectively block the needle-column-shaped through hole 232 to prevent the aluminum alloy liquid from leaking or overflowing through the needle-column-shaped through hole 232, thereby ensuring the smooth progress of the processing process. In summary, the downward pressure mechanism 60 not only adjusts the height of the semi-solid aluminum alloy liquid in the second space 32 by precisely controlling the position and movement of the ejector pin 61 in the needle-column-shaped through hole 232, but also effectively blocks the needle-column-shaped through hole 232, thereby ensuring the stability of the entire processing process and the quality of the product. The downward pressure mechanism 60 applies downward pressure to the aluminum alloy liquid through the ejector pin 61, while the upward pressure mechanism 40 applies upward pressure to the aluminum alloy liquid through the ejector pin 41 and the solid copper substrate 91. This two-way pressure method can effectively eliminate the uneven stress in the aluminum alloy liquid and avoid cracks or deformation of the product during the solidification process.

[0048] In a preferred embodiment of the utility model, the downward pressure driving mechanism 62 includes a downward pressure electric cylinder, a second lifting plate 622 connected to the output shaft 621 of the downward pressure electric cylinder, and a second locking block 623. A plurality of ejectors 61 are inserted into a preset mounting hole on the second lifting plate 622. The upper end of the ejector 61 is provided with a limiting flange placed below the second lifting plate 622 and abutting against the second lifting plate 622. The second locking block 623 is fixed to the second lifting plate 622 by a second bolt and cooperates with the second lifting plate 622 to clamp and fix the limiting flange.

[0049] On the basis of the above structure, the downward pressure electric cylinder starts to work, driving the second lifting plate 622 to move downward in the height direction. As the second lifting plate 622 descends, the ejector pin 61 inserted into the mounting hole also moves downward. Since the limiting flange at the upper end of the ejector pin 61 is tightly fixed by the second lifting plate 622 and the second locking block 623, the ejector pin 61 can stably and accurately transmit the movement of the second lifting plate 622. The ejector pin 61 is pressed down to apply pressure to the aluminum alloy liquid in the mold. By adjusting the force and speed of the downward pressure, the shape and density of the aluminum alloy liquid can be controlled. When the ejector pin 61 and the second lifting plate 622 reach the preset position, the downward pressure electric cylinder stops working and completes a downward pressure action. At this time, the aluminum alloy liquid has been evenly compressed to the required shape and density. Through this design, the downward pressure drive mechanism 62 can realize efficient and accurate downward pressure operation, and work in conjunction with the upper ejection mechanism 40 to ensure that the aluminum alloy liquid is more evenly stressed during the processing process, thereby improving the quality of the product.

[0050] In a preferred embodiment of the present invention, an exhaust gap is formed between the ejector pin 61 and the needle-shaped through hole 232, and the diameter of the exhaust gap is 3-6 microns. Within this size range, it is ensured that the gas can be effectively discharged from the gap, while preventing the aluminum alloy liquid from leaking through the gap.

[0051] In a preferred embodiment of the present invention, a pressure sensor 70 is further included. The pressure sensor 70 is embedded in the upper mold core 23 and / or the lower mold core 13 . The pressure sensor 70 is used to detect the pressure in the mold cavity 30 .

[0052] The pressure sensor 70 is usually embedded in the upper mold core 23 and / or the lower mold core 13, so that the pressure change in the cavity 30 can be most directly monitored. The specific location of the sensor needs to be accurately selected according to the design of the mold and the requirements of the product to ensure the accuracy and reliability of the data.

[0053] In a preferred embodiment of the present invention, a temperature sensor 80 is further included. The temperature sensor 80 is embedded in the upper mold core 23 and / or the lower mold core 13 . The temperature sensor 80 is used to detect the temperature in the mold cavity 30 .

[0054] The temperature sensor 80 may be embedded in the upper mold core 23 and / or the lower mold core 13, so that the temperature change in the cavity 30 can be most directly monitored. According to the specific design and production requirements of the mold, the position of the sensor needs to be precisely selected to ensure that the actual temperature in the cavity 30 can be accurately reflected.

[0055] Although only certain components and embodiments of the present application have been illustrated and described, many modifications and changes may be conceived by those skilled in the art without actually departing from the scope and spirit of the claims, such as changes in the size, dimensions, structure, shape and proportion of the various elements, mounting arrangements, material usage, color, orientation, etc.

[0056] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A top forming die for a copper-aluminum composite pin-shaped row, characterized in that: include: A lower mold assembly, the lower mold assembly comprising a lower mold mounting seat, a lower mold plate and a lower mold core, the lower mold plate is mounted on the lower mold mounting seat, and the lower mold core is mounted on the lower mold plate; An upper mold assembly, the upper mold assembly comprising an upper mold mounting seat, an upper mold plate and an upper mold core; The upper die mounting seat is mounted on the lower die mounting seat, the upper die plate is mounted on the upper die mounting seat, and the upper die core is mounted on the upper die plate; The upper mold core and the lower mold core are enclosed to form a mold cavity, which includes a first space for accommodating a solid copper substrate and a semi-solid aluminum alloy liquid and a second space for forming a plurality of aluminum needle columns; An upper ejection mechanism is installed on the lower mold mounting seat, and the upper ejection mechanism includes a plurality of ejector rods penetrating the lower mold core and an upper ejection driving mechanism, and the upper ejection driving mechanism is used to drive the ejector rods to move up and down in the height direction relative to the lower mold core. When the upper ejection driving mechanism drives the ejector rods to move upward, the ejector rods drive the solid copper substrate to move upward, so that the solid copper substrate squeezes part of the semi-solid aluminum alloy liquid in the first space into the second space.

2. The top forming mold according to claim 1, characterized in that: It also includes a heating component, which is embedded in the upper mold core and / or the lower mold core. The heating component is used to heat the upper mold core and / or the lower mold core to achieve heating of the workpiece to be formed by heat conduction.

3. The top forming mold according to claim 2, characterized in that: The heating assembly includes a plurality of electric heating tubes evenly distributed inside the upper mold core and the lower mold core.

4. The top forming mold according to claim 2, characterized in that: A recessed portion is formed on the upper surface of the lower mold core, a raised portion is formed on the bottom surface of the upper mold core extending downward, and a plurality of needle-column-shaped through holes arranged at intervals are provided at positions corresponding to the raised portions on the upper mold core; the first space is formed by the raised portion and the recessed portion, and the second space is formed by a plurality of needle-column-shaped through holes respectively connected to the first space.

5. The top forming mold according to claim 4, characterized in that: The upper ejection driving mechanism includes an upper ejection electric cylinder, a first lifting plate connected to the output shaft of the upper ejection electric cylinder, and a first locking block. A plurality of ejector rods are inserted into a preset mounting hole on the first lifting plate. The lower end of the ejector rod is provided with a limiting flange placed under the first lifting plate and abutting against the first lifting plate. The first locking block is fixed to the first lifting plate by a first bolt and cooperates with the first lifting plate to clamp and fix the limiting flange. The upper ejection electric cylinder drives the first lifting plate to move upward in the height direction. The first lifting plate drives the ejector rod to move upward in the height direction relative to the lower mold core. The ejector rod drives the solid copper base plate to move upward, so that the solid copper base plate squeezes part of the semi-solid aluminum alloy liquid in the first space into the second space.

6. The top forming mold according to claim 4, characterized in that: The invention also includes a pressing mechanism, which includes a plurality of ejector pins penetrating the upper mold core and a pressing drive mechanism, wherein the plurality of ejector pins are connected in a one-to-one correspondence with the plurality of needle-column-shaped through holes, and the pressing drive mechanism is used to drive the ejector pins to move up and down in the height direction relative to the upper mold core, so that part of the ejector pins moves up and down in the needle-column-shaped through holes, so as to adjust the height of the semi-solid aluminum alloy liquid in the second space and seal the upper end of the needle-column-shaped through holes.

7. The top forming mold according to claim 6, characterized in that: The downward pressure driving mechanism includes a downward pressure electric cylinder, a second lifting plate connected to the output shaft of the downward pressure electric cylinder, and a second locking block. A plurality of ejectors are inserted into preset mounting holes on the second lifting plate. The upper ends of the ejectors are provided with a limiting flange which is placed below the second lifting plate and abuts against the second lifting plate. The second locking block is fixed to the second lifting plate by a second bolt and cooperates with the second lifting plate to clamp and fix the limiting flange.

8. The top forming mold according to claim 7, characterized in that: An exhaust gap is formed between the ejector pin and the needle-shaped through hole, and the diameter of the exhaust gap is 3-6 microns.

9. The top forming mold according to claim 1, characterized in that: It also includes a pressure sensor, which is embedded in the upper mold core and / or the lower mold core and is used to detect the pressure in the mold cavity.

10. The top forming mold according to claim 1, characterized in that: It also includes a temperature sensor, which is embedded in the upper mold core and / or the lower mold core and is used to detect the temperature in the mold cavity.

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