A bottom top forming die for copper-aluminum composite pin-shaped row parts

Abstract

The present invention relates to the field of metal profile processing technology, and in particular to a lower ejection forming mold for a copper-aluminum composite needle-type row-shaped part, comprising a lower mold assembly, an upper mold assembly and a lower ejection mechanism, wherein an upper mold core and a lower mold core are enclosed to form a cavity, and the cavity comprises a first space and a second space; the first space is formed by enclosing a convex portion and a concave portion, and the second space is formed by a plurality of needle-column-shaped through holes; the lower ejection mechanism comprises a plurality of ejectors and a lower ejection driving mechanism, and the lower ejection driving mechanism is used to drive the ejectors to move upward, so that a portion of the ejectors moves upward in the needle-column-shaped through holes, so as to extrude semi-solid aluminum alloy liquid and seal the lower end of the needle-column-shaped through holes. The present invention realizes the extrusion of semi-solid aluminum alloy liquid and the sealing of the lower end of the needle-column-shaped through holes by cooperating with an upper mold core and a lower mold core, combined with the movement of the lower ejection mechanism, thereby completing the metallurgical bonding of the copper substrate and the aluminum substrate and the forming of the aluminum needle column at one time, and significantly improving the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of metal profile processing, in particular to a lower top forming die of 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 parts. The heat conducting plate has the following technical disadvantages: the copper-aluminum composite rolled plate is produced by a semi-molten rolling composite method, and then forged, cut and processed. This series of process flows is relatively complicated, and each step of the process requires precise control, otherwise it may affect the quality of the final product. The complicated process flow may also lead to reduced production efficiency and increased production costs. In addition, scraps and waste may be generated during the rolling, forging and cutting processes, resulting in material waste, which not only increases production costs, but is also not conducive to environmental protection and sustainable development. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one of the purposes of the present invention is to provide a lower top forming mold for a copper-aluminum composite needle-type row-shaped part, which realizes the extrusion of semi-solid aluminum alloy liquid and the blocking of the lower end of the needle-shaped through hole through precise cooperation between the upper mold core and the lower mold core, combined with the movement of the lower top mechanism, thereby completing the metallurgical bonding of the copper substrate and the aluminum substrate and the forming of the aluminum needle column at one time, significantly improving the production efficiency, and greatly simplifying the production process through a one-time forming operation.

[0005] The first aspect of the present invention provides a lower top forming mold for a copper-aluminum composite pin-type row-shaped part, and the lower top forming mold comprises:

[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; a recessed portion is formed on the upper surface of the lower mold core, and a plurality of needle-column-shaped through holes arranged at intervals are provided on the lower mold core at positions corresponding to the recessed portion;

[0007] An upper mold assembly, the upper mold assembly comprising an upper mold plate and an upper mold core; the upper mold core is mounted on the upper mold plate; the bottom surface of the upper mold core extends downward to form a convex portion;

[0008] The upper mold core and the lower mold core are enclosed to form a mold cavity, and the mold cavity includes a first space and a second space; the first space is formed by the convex part and the concave part, and the second space is formed by a plurality of needle-shaped through holes respectively connected to the first space;

[0009] A lower ejector mechanism is installed on the lower mold mounting seat, and the lower ejector mechanism includes a plurality of ejector pins penetrating the lower mold core and a lower ejector driving mechanism. The plurality of ejector pins are connected in a one-to-one correspondence in the plurality of needle-column-shaped through holes. The lower ejector driving mechanism is used to drive the ejector pins to move upward in the height direction relative to the lower mold core, so that part of the ejector pins moves upward in the needle-column-shaped through holes, so as to extrude the semi-solid aluminum alloy liquid and seal the lower end of the needle-column-shaped through holes.

[0010] In the first aspect of the present invention, as a preferred embodiment, it also includes a copper heat-conducting sleeve, which is sleeved on the outside of the lower mold core, and a heating component is also arranged inside the copper heat-conducting sleeve, and the heating component is used to heat the copper heat-conducting sleeve, so as to heat the lower mold core and the workpiece to be formed by heat conduction.

[0011] In the first aspect of the present invention, as a preferred embodiment, the lower mold core is a truncated cone structure, a truncated cone through hole penetrating the upper and lower surfaces of the copper heat-conductive sleeve is formed in the middle portion, the truncated cone through hole matches the outer surface of the lower mold core, and the copper heat-conductive sleeve is sleeved on the outside of the lower mold core through the truncated cone through hole.

[0012] In the first aspect of the present invention, as a preferred embodiment, the heating assembly includes a plurality of electric heating tubes evenly distributed inside the copper heat-conducting sleeve.

[0013] In the first aspect of the present invention, as a preferred embodiment, a heating assembly is further provided inside the upper mold core, and the heating assembly includes a plurality of electric heating tubes uniformly distributed inside the upper mold core.

[0014] In the first aspect of the present invention, as a preferred embodiment, 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.

[0015] In the first aspect of the present invention, as a preferred embodiment, a first accommodating groove and a second accommodating groove located below the first accommodating groove are formed on the bottom surface of the lower mold core, a through hole is arranged on the lower mold plate, the upper part of the first accommodating groove is connected with the recessed portion through a plurality of the needle-shaped through holes, and the lower part of the second accommodating groove is connected with the through hole; the diameter of the second accommodating groove is larger than the diameter of the first accommodating groove, the diameter of the first accommodating groove is larger than the diameter of the recessed portion, and the diameter of the second accommodating groove is larger than the diameter of the through hole.

[0016] In the first aspect of the present invention, as a preferred embodiment, the lower ejection driving mechanism includes a lower ejection electric cylinder, a lifting plate and a limit plate.

[0017] The output shaft of the lower electric cylinder is inserted into the through hole;

[0018] The limiting plate is fixedly mounted on the upper portion of the second containing groove and blocks the lower opening of the first containing groove, and a plurality of limiting holes are arranged on the limiting plate, and the plurality of limiting holes correspond to the plurality of needle-shaped through holes one by one;

[0019] The lifting plate is movably arranged in the second receiving groove, and the bottom surface of the lifting plate is fixedly connected or abutted against the output shaft of the lower electric cylinder;

[0020] The lower ends of the plurality of ejector pins are fixedly connected or abutted against the top surface of the lifting plate, and the upper ends of the plurality of ejector pins correspondingly pass through the limiting holes and extend into the needle-shaped through holes.

[0021] In the first aspect of the present invention, as a preferred embodiment, the ejector pin includes a cylindrical pressing portion, a truncated cone transition portion and a cylindrical connecting portion which are sequentially connected from top to bottom; the diameter of the cylindrical connecting portion is larger than the cylindrical pressing portion, and the diameter of the cylindrical connecting portion is the same as the diameter of the limiting hole.

[0022] In the first aspect of the present invention, as a preferred embodiment, the lower push driving mechanism also includes a support plate and a spring, the support plate is fixedly mounted on the outer wall of the output shaft of the lower push electric cylinder, the spring is sleeved on the output shaft of the lower push electric cylinder, the upper end thereof abuts against the bottom surface of the lower template, and the lower end thereof abuts against the top surface of the support plate.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In the actual application process of the present invention, the upper mold assembly is first lifted by an external device, and the semi-solid aluminum alloy liquid is injected into the cavity formed by the concave part of the lower mold core and the convex part of the upper mold core. The pouring speed and pouring amount are controlled to ensure that part of the semi-solid aluminum alloy liquid is filled into the second space (i.e., the needle-column-shaped through hole), and the remaining semi-solid aluminum alloy liquid is located at the lower part of the first space (i.e., the space formed by the concave part and the convex part). The solid copper substrate is placed in the first space of the cavity to ensure that the copper substrate is placed flatly on the upper surface of the semi-solid aluminum alloy liquid. The upper mold assembly and the lower mold assembly are closed by an external device to form a complete cavity. The lower ejector mechanism is started, and the lower ejector drive mechanism drives the ejector pin to move upward in the height direction relative to the lower mold core. The upward movement of the ejector pin squeezes the semi-solid aluminum alloy liquid, so that it is more tightly filled in the cavity and possible cavities and bubbles are eliminated. At the same time, the upward movement of the ejector pin also blocks the lower end of the needle-column-shaped through hole to ensure the integrity and stability of the aluminum needle column. After the preset extrusion time, stop extrusion. Wait for a while to allow the copper-aluminum composite needle-shaped array to naturally cool and solidify in the mold. When the copper-aluminum composite needle-shaped array reaches sufficient strength, open the mold. The molded product is ejected from the first space by the lower ejection mechanism to complete the demolding operation. In this way, the present invention realizes the extrusion of semi-solid aluminum alloy liquid and the sealing of the lower end of the needle-shaped through hole through the precise coordination of the upper mold core and the lower mold core, combined with the movement of the lower ejection mechanism, thereby completing the metallurgical bonding of the copper substrate and the aluminum substrate and the molding of the aluminum needle column at one time. The first space is used for the metallurgical bonding 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 molding, but also improves production efficiency.

[0025] 2. The present invention also includes a copper heat-conducting sleeve, a heating assembly is also arranged inside the copper heat-conducting sleeve, and the copper heat-conducting sleeve is sleeved on the outside of the lower mold core through a truncated cone-shaped through hole. The copper heat-conducting sleeve transfers heat energy to the lower mold core and the workpiece to be formed evenly with its excellent thermal conductivity; the expansion and contraction characteristics of the copper heat-conducting sleeve during heating and cooling, combined with the design of conical surface matching, enable the mold to maintain working stability and precision while also having good disassembly and maintainability.

[0026] 3. The bottom surface of the lower mold core of the present invention is formed with a first receiving groove and a second receiving groove, and the lower ejection driving mechanism includes a lower ejection electric cylinder, a lifting plate and a limit plate; when it is necessary to eject the product, the lower ejection electric cylinder works to push the lifting plate up. The lifting plate drives the ejector pin to move upward, pass through the limit hole and the needle-shaped through hole, and eject the product from the mold. When it is necessary to reset the product, the lower ejection electric cylinder works in the reverse direction to make the lifting plate descend. The ejector pin then descends and returns to the initial position to prepare for the next mold operation. When the mold cavity generates hot air during the injection molding or die-casting process, the hot air can be discharged into the first receiving groove through the needle-shaped through hole. Since the lower opening of the first receiving groove is blocked by the limit plate, a relatively closed space is formed, in which the hot air can be stored instead of being directly discharged. By storing the hot air, the first receiving groove can maintain the temperature around the cavity to a certain extent, which helps to control the temperature distribution of the mold. By preventing the hot air from being directly discharged through the first receiving groove, the temperature increase in the working area is reduced, providing a more comfortable working environment for the operator. At the same time, it also reduces the safety risks that may be caused by high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the lower top forming mold of the present invention;

[0028] Figure 2 is a cross-sectional view of the lower top forming mold of the present invention;

[0029] Figure 3 is a cross-sectional view of the lower top forming mold of the present invention from another angle;

[0030] Figure 4 It is a cross-sectional view of the present invention in which the lower top forming mold of the copper-aluminum composite pin-type row-shaped part is omitted;

[0031] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of the A part;

[0032] Figure 6 It is a structural schematic diagram of the lower mold assembly of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the lower lifting mechanism of the present invention;

[0034] Figure 8 It is a schematic structural diagram of the ejector pin of the present invention;

[0035] Fig. 9 It is a schematic structural diagram of the copper-aluminum composite pin-type row-shaped component of the present invention.

[0036] In the figure:

[0037] 10. lower mold assembly; 11. lower mold mounting seat; 12. lower mold plate; 121. through hole; 13. lower mold core; 131. recessed portion; 132. needle-shaped through hole; 133. first receiving groove; 134. second receiving groove;

[0038] 20. upper mold assembly; 21. upper mold plate; 22. upper mold core; 221. raised portion;

[0039] 30. Cavity; 31. First space; 32. Second space;

[0040] 40. lower ejection mechanism; 41. ejector pin; 411. cylindrical ejection pressing portion; 412. truncated cone transition portion; 413. cylindrical connecting portion; 42. lower ejection driving mechanism; 421. output shaft; 422. lifting plate; 423. limiting plate; 4231. limiting hole; 424. support plate; 425. spring;

[0041] 50. Copper heat-conducting sleeve; 51. truncated cone-shaped through hole;

[0042] 60. Heating assembly; 61. Electric heating tube;

[0043] 70. Temperature sensor;

[0044] 80. Copper-aluminum composite pin-type row-shaped component; 81. Copper base plate; 82. Aluminum base plate; 83. Aluminum pin column. DETAILED DESCRIPTION

[0045] Below, in conjunction with the accompanying drawings and specific embodiments, the invention 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 as otherwise specified, 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] Please refer to Figure 1-9 As shown, this embodiment provides a lower top forming mold for a copper-aluminum composite pin-type row-shaped part, and the lower top forming mold includes:

[0050] 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. A recessed portion 131 is formed on the upper surface of the lower mold core 13, and a plurality of needle-shaped through holes 132 arranged at intervals are provided on the lower mold core 13 at positions corresponding to the recessed portion 131.

[0051] The upper mold assembly 20 includes an upper mold plate 21 and an upper mold core 22; the upper mold core 22 is installed on the upper mold plate 21; the bottom surface of the upper mold core 22 extends downward to form a protrusion 221;

[0052] The upper mold core 22 and the lower mold core 13 are enclosed to form a mold cavity 30, and the mold cavity 30 includes a first space 31 and a second space 32; the first space 31 is formed by the convex portion 221 and the concave portion 131, and the second space 32 is formed by a plurality of needle-shaped through holes 132 respectively connected to the first space 31;

[0053] The lower ejector mechanism 40 is installed on the lower mold mounting base 11. The lower ejector mechanism 40 includes a plurality of ejector pins 41 penetrating the lower mold core 13 and a lower ejector driving mechanism 42. The plurality of ejector pins 41 are connected one by one in the plurality of needle-column-shaped through holes 132. The lower ejector driving mechanism 42 is used to drive the ejector pins 41 to move upward in the height direction relative to the lower mold core 13, so that part of the ejector pins 41 moves upward in the needle-column-shaped through holes 132, so as to extrude the semi-solid aluminum alloy liquid and seal the lower end of the needle-column-shaped through holes 132.

[0054] On the basis of the above structure, in the actual application process, the upper mold assembly 20 is first lifted by an external device, and the semi-solid aluminum alloy liquid is injected into the mold cavity 30 formed by the recessed portion 131 of the lower mold core 13 and the raised portion 221 of the upper mold core 22. The pouring speed and pouring amount are controlled to ensure that part of the semi-solid aluminum alloy liquid is filled into the second space 32 (i.e., multiple needle-shaped through holes 132), while the remaining semi-solid aluminum alloy liquid is located at the lower part of the first space 31 (i.e., the space formed by the recessed portion 131 and the raised portion 221). The solid copper substrate 81 is placed in the first space 31 of the mold cavity 30 to ensure that the copper substrate 81 is placed flatly on the upper surface of the semi-solid aluminum alloy liquid. The upper mold assembly 20 and the lower mold assembly 10 are closed by an external device to form a complete mold cavity 30. The lower ejector mechanism 40 is started, and the lower ejector drive mechanism 42 drives the ejector pin 41 to move upward in the height direction relative to the lower mold core 13. The upward movement of the ejector pin 41 squeezes the semi-solid aluminum alloy liquid, so that it is more tightly filled in the mold cavity 30, and possible voids and bubbles are eliminated. At the same time, the upward movement of the ejector pin 41 also blocks the lower end of the needle-shaped through hole 132 to ensure the integrity and stability of the aluminum needle column 83. After the preset extrusion time, stop the extrusion. Wait for a period of time to allow the copper-aluminum composite needle-shaped row 80 to naturally cool and solidify in the mold. When the copper-aluminum composite needle-shaped row 80 reaches sufficient strength, open the mold. The molded product is ejected from the first space 31 by the lower ejector mechanism 40 to complete the demolding operation. In this way, the present invention realizes the extrusion of the semi-solid aluminum alloy liquid and the blocking of the lower end of the needle-shaped through hole 132 through the precise cooperation of the upper mold core 22 and the lower mold core 13, combined with the movement of the lower ejector mechanism 40, thereby completing the metallurgical bonding of the copper substrate 81 and the aluminum substrate 82 and the molding of the aluminum needle column 83 at one time. The first space 31 is used for metallurgical bonding of the copper substrate 81 and the aluminum alloy liquid, and the second space 32 is specifically used for forming the aluminum needle column 83, which not only ensures the accuracy of forming, but also improves the production efficiency.

[0055] In this embodiment, the copper-aluminum composite needle array 80 includes a substrate, which includes a copper substrate 81 and an aluminum substrate 82 metallurgically bonded to the surface of the copper substrate 81; a plurality of spaced aluminum needle columns 83 are formed on the aluminum substrate 82. Preferably, a plurality of spaced dovetail grooves are formed on the lower surface of the copper substrate 81. By providing a dovetail groove on the lower surface of the copper substrate 81, the contact area with the aluminum alloy liquid is increased. This design not only provides more connection points, but also makes the connection interface more solid, thereby enhancing the stability of the connection. The special shape of the dovetail groove can produce a mechanical locking effect. When the aluminum alloy liquid flows into the groove and solidifies, it forms a mutually interlocking structure with the copper substrate 81. This structure can effectively resist the influence of external forces (such as vibration, impact, etc.) on the connection and maintain the stability of the connection.

[0056] In a preferred embodiment of the present invention, a copper heat-conducting sleeve 50 is further included. The copper heat-conducting sleeve 50 is sleeved on the outside of the lower mold core 13. A heating component 60 is also provided inside the copper heat-conducting sleeve 50. The heating component 60 is used to heat the copper heat-conducting sleeve 50, so as to heat the lower mold core 13 and the workpiece to be formed by heat conduction.

[0057] On the basis of the above structure, the copper heat-conducting sleeve 50 is made of copper material with high thermal conductivity, has good thermal conductivity and ductility, and can adapt to lower mold cores 13 of different shapes and sizes. When the heating assembly 60 is powered on, the current passes through the heating wire, and the heating wire generates heat and transfers it to the copper heat-conducting sleeve 50. The copper heat-conducting sleeve 50 transfers heat energy to the lower mold core 13 and the workpiece to be formed evenly with its excellent thermal conductivity. The controller detects the heating temperature and compares it with the set value, and automatically adjusts the current of the heating wire to maintain the required heating temperature.

[0058] In a preferred embodiment of the present invention, the lower mold core 13 is a truncated cone structure, and a truncated cone through hole 51 is formed in the middle of the copper heat-conducting sleeve 50, which passes through the upper and lower surfaces thereof. The truncated cone through hole 51 matches the outer surface of the lower mold core 13, and the copper heat-conducting sleeve 50 is sleeved on the outside of the lower mold core 13 through the truncated cone through hole.

[0059] On the basis of the above structure, since the lower mold core 13 is usually made of hot working mold steel, and the copper heat-conducting sleeve 50 is made of copper material, there is a significant difference in the thermal expansion coefficient between the two. The thermal expansion coefficient of copper is greater than that of steel, so during the heating process, the copper heat-conducting sleeve 50 will expand more easily than the lower mold core 13. Since the copper heat-conducting sleeve 50 will expand when heated, the conical surface fit allows the copper heat-conducting sleeve 50 to move slightly along the conical surface direction when expanding, thereby automatically compensating for the size difference between the two due to different thermal expansion coefficients. The conical surface fit makes the pressure on the contact surface between the copper heat-conducting sleeve 50 and the lower mold core 13 increase with the increase of temperature. This is because as the copper heat-conducting sleeve 50 expands, it will fit more closely on the conical surface of the lower mold core 13, thereby increasing the contact pressure and friction between the two. The design of the conical surface fit not only enhances the stability of the connection, but also improves the reliability of the connection. Even at high temperatures, the connection between the copper heat-conducting sleeve 50 and the lower mold core 13 is not easy to loosen or fall off, ensuring the stable operation of the mold. When the copper heat-conductive sleeve 50 and the lower mold core 13 (usually made of steel) form a tight and stable conical fit during heating, as the mold cools and the copper heat-conductive sleeve 50 shrinks, this fit will become slightly loose. This looseness will not only not affect the stability and precision of the mold during operation, but will help simplify the disassembly process of the mold. Due to the shrinkage characteristics of the copper heat-conductive sleeve 50 after cooling, its fastening force on the lower mold core 13 is reduced, and the operator can easily remove the copper heat-conductive sleeve 50 from the lower mold core 13 for cleaning, maintenance, replacement and other operations. Therefore, the expansion and contraction characteristics of the copper heat-conductive sleeve 50 during heating and cooling, combined with the design of the conical fit, enable the mold to maintain working stability and precision while also having good disassembly and maintainability.

[0060] In a preferred embodiment of the present invention, the heating assembly 60 includes a plurality of electric heating tubes 61 evenly distributed inside the copper heat-conducting sleeve 50. 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.

[0061] Preferably, a heating assembly 60 is further provided inside the upper mold core 22, and the heating assembly 60 includes a plurality of electric heating tubes 61 evenly distributed inside the upper mold core. 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.

[0062] Preferably, a temperature sensor 70 is also provided inside the upper mold core 22 and the copper heat-conducting sleeve 50, and the temperature of the semi-solid aluminum alloy liquid is obtained by the temperature sensor 70. When the temperature of the semi-solid aluminum alloy liquid is lower than a preset temperature value, the heating component 60 is controlled to heat the upper mold core 22 and / or the copper heat-conducting sleeve 50.

[0063] In a preferred embodiment of the present invention, an exhaust gap is formed between the ejector pin 41 and the needle-shaped through hole 132, 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.

[0064] In a preferred embodiment of the present invention, a first accommodating groove 133 and a second accommodating groove 134 located below the first accommodating groove 133 are formed on the bottom surface of the lower mold core 13, and a through hole 121 is provided on the lower mold plate 12. The upper part of the first accommodating groove 133 is connected to the recessed portion 131 through a plurality of needle-shaped through holes 132, and the lower part of the second accommodating groove 134 is connected to the through hole 121; the diameter of the second accommodating groove 134 is larger than the diameter of the first accommodating groove 133, the diameter of the first accommodating groove 133 is larger than the diameter of the recessed portion 131, and the diameter of the second accommodating groove 134 is larger than the diameter of the through hole 121.

[0065] On the basis of the above structure, the first receiving groove 133 is located at the top and connected to the needle column through hole 132, which is used to accommodate and guide the ejector pin 41 when the mold is operated. The second receiving groove 134 is located below the first receiving groove 133 and has a larger diameter, providing an operating space for the lower ejector drive mechanism 42. The lower mold plate 12 is provided with a through hole 121, which is connected to the lower part of the second receiving groove 134, allowing the output shaft 421 of the lower ejector drive mechanism 42 to pass through and drive the lifting plate 422.

[0066] In a preferred embodiment of the present invention, the lower push driving mechanism 42 includes a lower push electric cylinder, a lifting plate 422 and a limit plate 423;

[0067] The output shaft 421 of the lower electric cylinder is inserted into the through hole 121;

[0068] The limiting plate 423 is fixedly installed on the upper part of the second receiving groove 134 and blocks the lower opening of the first receiving groove 133. The limiting plate 423 is provided with a plurality of limiting holes 4231, and the plurality of limiting holes 4231 correspond to the plurality of needle-shaped through holes 132 one by one.

[0069] The lifting plate 422 is movably disposed in the second receiving groove 134, and the bottom surface of the lifting plate 422 is fixedly connected or abutted against the output shaft 421 of the lower electric cylinder;

[0070] The lower ends of the plurality of ejector pins 41 are fixedly connected or abutted against the top surface of the lifting plate 422 , and the upper ends of the plurality of ejector pins 41 correspondingly pass through the limiting holes 4231 and extend into the needle-shaped through holes 132 .

[0071] On the basis of the above structure, when it is necessary to eject the product, the lower ejector electric cylinder works to push the lifting plate 422 upward. The lifting plate 422 drives the ejector pin 41 to move upward, pass through the limiting hole 4231 and the needle-shaped through hole 132, and eject the product from the mold. When it is necessary to reset the product, the lower ejector electric cylinder works in the reverse direction to make the lifting plate 422 descend. The ejector pin 41 then descends and returns to the initial position to prepare for the next mold operation. When the mold cavity 30 generates hot air during the injection molding or die-casting process, the hot air can be discharged into the first receiving groove 133 through the needle-shaped through hole 132. Since the lower opening of the first receiving groove 133 is blocked by the limiting plate 423, a relatively closed space is formed, in which the hot air can be stored instead of being directly discharged. By storing the hot air, the first receiving groove 133 can maintain the temperature around the cavity 30 to a certain extent, which helps to control the temperature distribution of the mold. The first receiving groove 133 prevents the hot air from being directly discharged, reduces the increase in the temperature of the working area, and provides a more comfortable working environment for the operator. At the same time, it also reduces the safety risks that may be caused by high temperatures.

[0072] In a preferred embodiment of the present invention, the ejector pin 41 includes a cylindrical pressing portion 411, a truncated cone transition portion 412 and a cylindrical connecting portion 413 which are sequentially connected from top to bottom; the diameter of the cylindrical connecting portion 413 is larger than that of the cylindrical pressing portion 411, and the diameter of the cylindrical connecting portion 413 is the same as the diameter of the limiting hole 4231.

[0073] On the basis of the above structure, the diameter of the cylindrical connecting portion 413 is larger than the cylindrical pressing portion 411, so that the contact area between the connecting portion and the lifting plate 422 is increased. Therefore, when the ejector pin 41 is subjected to downward pressure, this design can effectively disperse the pressure and reduce the stress per unit area, thereby improving the connection strength between the ejector pin 41 and the lifting plate 422. Due to the improvement in the connection strength, the ejector pin 41 is less likely to bend or deform when subjected to force, thereby ensuring the stability and reliability of the mold. When the ejector pin 41 moves upward to the position of the lower end entrance of the truncated cone transition portion 412 and the needle-column-shaped through hole 132, due to the gradual increase in the diameter of the truncated cone transition portion 412, it will form contact with the lower end of the needle-column-shaped through hole 132. This design can limit the ejector pin 41 from continuing to move upward, thereby ensuring that the ejector pin 41 stops moving after reaching the predetermined position, avoiding damage or misoperation caused by excessive movement.

[0074] In a preferred embodiment of the present invention, the lower push driving mechanism 42 also includes a support plate 424 and a spring 425. The support plate 424 is fixedly mounted on the outer wall of the output shaft 421 of the lower push electric cylinder. The spring 425 is sleeved on the output shaft 421 of the lower push electric cylinder, and its upper end abuts against the bottom surface of the lower template 12, and its lower end abuts against the top surface of the support plate 424.

[0075] On the basis of the above structure, the introduction of the support plate 424 and the spring 425 enhances the stability of the lower ejector drive mechanism 42, ensuring the accuracy and reliability of the ejector pin 41 during movement. The spring 425 is sleeved on the output shaft 421 of the lower ejector electric cylinder to play a role in buffering and shock absorption. When the lifting plate 422 is subjected to a rapid or strong impact, the spring 425 can absorb these impact forces and reduce damage to the mold and equipment. When the lower ejector electric cylinder stops working, the spring 425 can use its elastic force to help the lifting plate 422 quickly return to its initial position. This helps to improve the operating efficiency and accuracy of the mold. By adjusting the preload and stiffness of the spring 425, it can adapt to the working requirements under different pressures. This makes the lower ejector drive mechanism 42 more flexible and versatile.

[0076] 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.

[0077] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection 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 bottom top forming die for a copper-aluminum composite pin-shaped row, characterized in that: The lower top forming mold comprises: 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; a recessed portion is formed on the upper surface of the lower mold core, and a plurality of needle-column-shaped through holes arranged at intervals are provided on the lower mold core at positions corresponding to the recessed portion; An upper mold assembly, the upper mold assembly comprising an upper mold plate and an upper mold core; the upper mold core is mounted on the upper mold plate; the bottom surface of the upper mold core extends downward to form a convex portion; The upper mold core and the lower mold core are enclosed to form a mold cavity, and the mold cavity includes a first space and a second space; the first space is formed by the convex part and the concave part, and the second space is formed by a plurality of needle-shaped through holes respectively connected to the first space; A lower ejector mechanism, the lower ejector mechanism is mounted on the lower die mounting seat, the lower ejector mechanism comprises a plurality of ejector pins penetrating the lower die core and a lower ejector driving mechanism, the plurality of ejector pins are correspondingly connected in the plurality of needle-column-shaped through holes, the lower ejector driving mechanism is used to drive the ejector pins to move upward in the height direction relative to the lower die core, so that a portion of the ejector pins moves upward in the needle-column-shaped through holes, so as to extrude the semi-solid aluminum alloy liquid and seal the lower end of the needle-column-shaped through holes; It also includes a copper heat-conducting sleeve, which is sleeved on the outside of the lower mold core, and a heating component is also arranged inside the copper heat-conducting sleeve, and the heating component is used to heat the copper heat-conducting sleeve, so as to heat the lower mold core and the workpiece to be formed in a heat conduction manner; The lower mold core is a truncated cone structure, and a truncated cone through hole penetrating the upper and lower surfaces of the copper heat-conducting sleeve is formed in the middle part thereof, the truncated cone through hole matches the outer surface of the lower mold core, and the copper heat-conducting sleeve is sleeved on the outside of the lower mold core through the truncated cone through hole; The heating assembly comprises a plurality of electric heating tubes evenly distributed inside the copper heat-conducting sleeve; the lower mold core is made of steel.

2. The lower top forming mold of the copper-aluminum composite pin-shaped row member according to claim 1 is characterized in that: A heating assembly is also provided inside the upper mold core, and the heating assembly includes a plurality of electric heating tubes evenly distributed inside the upper mold core.

3. The lower top forming mold of the copper-aluminum composite pin-shaped row member according to claim 1, 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.

4. The lower top forming mold of the copper-aluminum composite pin-shaped row member as claimed in claim 3, characterized in that: A first accommodating groove and a second accommodating groove located below the first accommodating groove are formed on the bottom surface of the lower mold core, and a through hole is arranged on the lower mold plate. The upper part of the first accommodating groove is connected with the recessed portion through a plurality of the needle-shaped through holes, and the lower part of the second accommodating groove is connected with the through hole; the diameter of the second accommodating groove is larger than the diameter of the first accommodating groove, the diameter of the first accommodating groove is larger than the diameter of the recessed portion, and the diameter of the second accommodating groove is larger than the diameter of the through hole.

5. The lower top forming mold of the copper-aluminum composite pin-shaped row member as claimed in claim 4, characterized in that: The lower ejection drive mechanism includes a lower ejection electric cylinder, a lifting plate and a limit plate. The output shaft of the lower electric cylinder is inserted into the through hole; The limiting plate is fixedly mounted on the upper portion of the second containing groove and blocks the lower opening of the first containing groove, and a plurality of limiting holes are arranged on the limiting plate, and the plurality of limiting holes correspond to the plurality of needle-shaped through holes one by one; The lifting plate is movably arranged in the second receiving groove, and the bottom surface of the lifting plate is fixedly connected or abutted against the output shaft of the lower electric cylinder; The lower ends of the plurality of ejector pins are fixedly connected or abutted against the top surface of the lifting plate, and the upper ends of the plurality of ejector pins correspondingly pass through the limiting holes and extend into the needle-shaped through holes.

6. The lower top forming die of the copper-aluminum composite pin-shaped row member as claimed in claim 5, characterized in that: The ejector pin comprises a cylindrical pressing portion, a truncated cone transition portion and a cylindrical connecting portion which are sequentially connected from top to bottom; the diameter of the cylindrical connecting portion is larger than that of the cylindrical pressing portion, and the diameter of the cylindrical connecting portion is the same as the diameter of the limiting hole.

7. The lower top forming mold of the copper-aluminum composite pin-shaped row member as claimed in claim 5, characterized in that: The lower push driving mechanism also includes a support plate and a spring. The support plate is fixedly mounted on the outer wall of the output shaft of the lower push electric cylinder. The spring is sleeved on the output shaft of the lower push electric cylinder, and its upper end abuts against the bottom surface of the lower template, and its lower end abuts against the top surface of the support plate.

Images