Metal-clad metal forming device and method in optical communication MIM industry

Abstract

The invention provides a metal-clad metal forming device in the optical communication MIM industry. The metal-clad metal forming device comprises an upper plate, a lower plate arranged at the bottom of the upper plate, a first mold, a second mold and a pouring opening, wherein the first mold and the second mold are arranged between the upper plate and the lower plate, and the pouring opening is formed in the surface of the upper plate. The mold further comprises an upper pressing plate and a lower pressing plate which are arranged in the first mold and the second mold, a pipeline for molten materials to pass through is arranged at the bottom of the pouring opening, an opening connected with the pipeline is formed in the surface of the upper pressing plate, a communicating pipe communicated with the opening is arranged in the upper pressing plate, an open groove for forming is formed in the lower pressing plate, and an inner material is fixed through magnets. The problem that a traditional nested piece is prone to deviation under injection pressure is solved, the device is provided with a double-loop cooling system, uniform cooling of a thick-wall metal piece is guaranteed, the shrinkage cavity defect is avoided, perfect combination of W80Cu20 and 4J29 is achieved through the technology, the physical characteristics of the W80Cu20 and the 4J29 are fully exerted, and the requirement for heat dissipation of a high-power device in the field of optical communication is met.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation, and more particularly to a metal-clad metal forming apparatus and forming method for the optical communication MIM industry. Background Technology

[0002] With the rapid development of AI technology globally, the demand for high-speed and high-capacity signal transmission in the communications field continues to rise. Massive data processing scenarios pose stringent challenges to the heat dissipation performance of equipment. The cost of traditional heat dissipation materials, such as copper and tungsten copper, remains high due to fluctuations in the global supply chain, which has become a significant pressure restricting the development of the industry.

[0003] Existing heat sinks made of 4J29 alloy and W80Cu20 alloy can meet heat dissipation requirements. However, when 4J29 alloy and W80Cu20 alloy are fused together, cracks, pores and electroplating liquid seepage are easily generated, which affects the normal use of the heat sink. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the existing technology. The present invention proposes a metal-clad metal forming device and forming method for the optical communication MIM industry.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a metal-clad metal forming device for the optical communication MIM industry, comprising: an upper plate, a lower plate disposed at the bottom of the upper plate, a mold one and a mold two disposed between the upper plate and the lower plate, and a pouring port disposed on the surface of the upper plate; It also includes an upper pressure plate and a lower pressure plate set inside mold one and mold two. The bottom of the pouring port is provided with a pipe for passing molten material. The surface of the upper pressure plate is provided with an opening connected to the pipe. The interior of the upper pressure plate is provided with a connecting pipe connected to the opening. The interior of the lower pressure plate is provided with a groove for forming.

[0006] Preferably, the lower pressure plate has a feeding pipe inside, and the surface of the connecting pipe has a lower tube connected to the feeding pipe.

[0007] Preferably, the lower pressure plate has a magnet inside, and the magnet is located inside the slot.

[0008] Preferably, the upper pressure plate is provided with an upper tube one inside, one end of the upper tube one is connected to a middle tube for cooling, and one end of the middle tube is connected to an upper tube two.

[0009] Preferably, the lower pressure plate is provided with a lower pipe one and a lower pipe two for transporting cooling water.

[0010] Preferably, the surface of the magnet is magnetically attracted to an inner material, which, in conjunction with the groove, shapes the molten material.

[0011] Preferably, the surface of the upper plate is provided with an outer ring for limiting the position of the pouring gate.

[0012] A method for forming metal-clad metal in the optical communication MIM industry, comprising: Tungsten copper prefabrication: W80Cu20 material is pressed and sintered using traditional pressing technology, and then precision machined by CNC to the design dimensions before fusion, which is the inner material; Injection embedding: The inner material is placed inside the groove, and 4J29 feed material is injected into the gating port through an injection molding machine. The 4J29 feed material is then formed inside the groove, forming a composite green body of tungsten copper encapsulated by 4J29 material. Degreasing and purification: The green embryo is degreased in a degreasing furnace to completely remove organic impurities such as binders from the 4J29 component; High-temperature sintering: Densification sintering is carried out in a sintering furnace for 22 hours to finally obtain the required metal composite heat dissipation components.

[0013] Preferably, the degreasing treatment time is 8 hours.

[0014] Preferably, the temperature inside the sintering furnace is 1300°C.

[0015] Compared with the prior art, the beneficial effects of the present invention include: by fixing the inner material with magnets, the problem of easy displacement of traditional nested parts under injection pressure is solved; the dual-loop cooling system of the device ensures uniform cooling of thick-walled metal parts and avoids shrinkage defects; the process achieves a perfect combination of W80Cu20 and 4J29, giving full play to the physical properties of the two metals and meeting the heat dissipation requirements of high-power devices in the field of optical communication. Attached Figure Description

[0016] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 The diagram illustrates the structure of a metal-clad metal forming apparatus for the optical communication MIM industry according to an embodiment of the present invention.

[0017] Figure 2 The diagram schematically shows a cross-sectional view of a forming apparatus according to an embodiment of the present invention.

[0018] Figure 3 The diagram illustrates an upper pressure plate and a lower pressure plate structure according to an embodiment of the present invention.

[0019] Figure 4 The diagram illustrates a lower pressure plate structure according to an embodiment of the present invention.

[0020] Figure 5The diagram illustrates a planar structure of a lower pressure plate according to an embodiment of the present invention.

[0021] Figure 6 The diagram illustrates an external material structure according to one embodiment of the present invention.

[0022] Figure 7 The diagram illustrates a connecting pipe structure according to an embodiment of the present invention.

[0023] Numbered in the diagram: 1. Upper plate; 2. Mold 1; 3. Mold 2; 4. Lower plate; 5. Lower pipe 1; 6. Upper pipe 1; 7. Pouring gate; 8. Outer ring; 9. Upper pressure plate; 10. Lower pressure plate; 11. Pipe; 12. Opening; 13. Lower pipe 2; 14. Upper pipe 2; 15. Middle pipe; 16. Outer material; 17. Inner material; 18. Connecting pipe; 19. Lower pipe; 20. Magnet; 21. Groove; 22. Feed pipe; Detailed Implementation

[0024] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0026] Example 1 This invention provides a metal-clad metal forming device for the optical communication MIM industry, which is mainly used to achieve the precise composite of two different metal materials.

[0027] The overall frame of the device includes a sturdy external frame consisting of an upper plate 1 and a lower plate 4 located at the bottom. Between the upper plate 1 and the lower plate 4, there are symmetrical or matching molds 2 and 3 to define the molding space. In order to accurately guide the molten material, the surface of the upper plate 1 is provided with an outer ring 8 to limit the position of the pouring gate 7 and ensure that the nozzle of the injection machine can be accurately aligned.

[0028] Inside the mold, the core forming components are the upper pressure plate 9 and the lower pressure plate 10.

[0029] The bottom of the pouring port 7 is connected to a pipe 11. The material enters the interior through the opening 12 on the surface of the upper pressure plate 9. Inside the upper pressure plate 9, the connecting pipe 18 is connected to the opening 12 and further connected to the discharge pipe 22 inside the lower pressure plate 10 through the lower pipe 19.

[0030] Cavity and positioning: The interior of the lower pressure plate 10 is provided with a groove 21 specifically for molding. In order to achieve the effect of "metal encasing metal", a magnet 20 is embedded in the groove 21 in this embodiment.

[0031] Cooling System: To improve molding efficiency and product quality, the device incorporates a dual cooling circuit. Upper circuit: The upper pressure plate 9 is equipped with upper tube 1 6 and upper tube 2 14, which are connected by the middle tube 15 to form a circulating cooling channel.

[0032] Lower circuit: The lower pressure plate 10 is independently equipped with lower pipe 5 and lower pipe 13 for transporting cooling water. Through cold water circulation, the heat of the molten material can be quickly removed, shortening the molding cycle and reducing thermal stress.

[0033] Example 2 Metal-clad metal forming process flow Based on the above-described apparatus, an embodiment of the present invention provides a method for forming optical communication MIMs, the specific steps of which are as follows: Step 1: Prefabrication of tungsten-copper inner material First, W80Cu20 material (an alloy of 80% tungsten and 20% copper) is pressed into shape using traditional powder metallurgy pressing technology and then pre-sintered. The sintered blank is then precision machined by CNC to the design dimensions before final fusion, resulting in inner material 17. This inner material serves as the heat dissipation core of the composite component and has extremely high thermal conductivity.

[0034] Step 2: Injection Embedding and Shaping Using the magnet 20 inside the lower pressure plate 10, the inner material 17 containing ferromagnetism or attracted by magnetic force is precisely adsorbed at the predetermined position of the slot 21. The magnetic fixation ensures that the inner material will not be displaced during the high-speed and high-pressure injection process.

[0035] After the mold is closed, 4J29 (Kovar alloy) is injected into the sprue 7 using an injection molding machine.

[0036] The molten 4J29 feed flows through the pipe to the slot 21, completely enveloping the inner material 17. Because 4J29 and the inner material have a good matching coefficient of expansion in the design, the two are formed in the slot, forming a metal-encased metal composite green blank.

[0037] Step 3: Degreasing and Purification The obtained composite green body is placed in a degreasing furnace for processing for about 8 hours. This step aims to completely remove organic impurities such as paraffin and polymer binder from the 4J29 feedstock, leaving microporous channels for subsequent densification sintering.

[0038] Step 4: High-temperature sintering and fusion The degreased product was placed in a sintering furnace and densified at a high temperature of 1300℃ for 22 hours.

[0039] During this process, the 4J29 powder particles undergo rearrangement and grain growth, eventually reaching a near-fully dense state, and forming a strong metallic bond with the tungsten copper inner material 17 at the interface, ultimately obtaining a metal composite heat dissipation component for optical communication with high thermal conductivity (tungsten copper core) and low expansion and easy soldering (4J29 outer shell).

[0040] By fixing the inner material with magnets, the problem of easy displacement of traditional nested parts under injection pressure is solved. The device's built-in dual-loop cooling system ensures uniform cooling of thick-walled metal parts and avoids shrinkage defects. This process achieves a perfect combination of W80Cu20 and 4J29, giving full play to the physical properties of the two metals and meeting the heat dissipation requirements of high-power devices in the field of optical communication.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A metal-clad metal forming device for the optical communication MIM industry, characterized in that, include: Upper plate (1), lower plate (4) set at the bottom of upper plate (1), mold one (2) and mold two (3) set between upper plate (1) and lower plate (4) and pouring port (7) set on the surface of upper plate (1); It also includes an upper pressure plate (9) and a lower pressure plate (10) set inside mold one (2) and mold two (3). The bottom of the pouring port (7) is provided with a pipe (11) for passing molten material. The surface of the upper pressure plate (9) is provided with an opening (12) connected to the pipe (11). The interior of the upper pressure plate (9) is provided with a connecting pipe (18) connected to the opening (12). The interior of the lower pressure plate (10) is provided with a groove (21) for molding.

2. The metal-clad metal forming device for the optical communication MIM industry according to claim 1, characterized in that, The lower pressure plate (10) is provided with a feeding pipe (22) inside, and the surface of the connecting pipe (18) is provided with a lower pipe (19) connected to the feeding pipe (22).

3. The metal-clad metal forming device for the optical communication MIM industry according to claim 1, characterized in that, The lower pressure plate (10) is provided with a magnet (20) inside, and the magnet (20) is located inside the slot (21).

4. The metal-clad metal forming device for the optical communication MIM industry according to claim 1, characterized in that, The upper pressure plate (9) is provided with an upper tube one (6) inside. One end of the upper tube one (6) is connected to a middle tube (15) for cooling, and one end of the middle tube (15) is connected to an upper tube two (14).

5. A metal-clad metal forming device for the optical communication MIM industry according to claim 1, characterized in that, The lower pressure plate (10) is provided with a lower pipe one (5) and a lower pipe two (13) for transporting cooling water.

6. A metal-clad metal forming apparatus for the optical communication MIM industry according to claim 3, characterized in that, The surface of the magnet (20) is magnetically attracted to the inner material (17), and the inner material (17) and the groove (21) work together to shape the molten material.

7. The metal-clad metal forming apparatus for the optical communication MIM industry according to claim 1, characterized in that, The surface of the upper plate (1) is provided with an outer ring (8) for limiting the position of the pouring port (7).

8. A method for forming metal-clad metal in the optical communication MIM industry, comprising the metal-clad metal forming apparatus for the optical communication MIM industry as described in any one of claims 1-7, characterized in that, include: Tungsten copper prefabrication: W80Cu20 material is pressed and sintered using traditional pressing technology, and then precision machined by CNC to the design dimensions before fusion, which is the inner material (17). Injection embedding: The inner material (17) is placed inside the slot (21), and 4J29 feed material is injected into the pouring port (7) through the injection machine. Then, 4J29 feed material is formed inside the slot (21) to form a composite green embryo of tungsten copper wrapped with 4J29 material. Degreasing and purification: The green embryo is degreased in a degreasing furnace to completely remove organic impurities such as binders from the 4J29 component; High-temperature sintering: Densification sintering is carried out in a sintering furnace for 22 hours to finally obtain the required metal composite heat dissipation components.

9. A method for forming metal-clad metal in the optical communication MIM industry according to claim 8, characterized in that, The degreasing process takes 8 hours.

10. A method for forming metal-clad metal in the optical communication MIM industry according to claim 8, characterized in that, The temperature inside the sintering furnace is 1300℃.

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