Silver casting gold forming device and casting process thereof

Abstract

The invention relates to the technical field of metal processing, in particular to a silver cast gold forming device and a casting process thereof.The silver cast gold forming device comprises a lower plate and an upper plate, the upper plate is located at the upper end of the lower plate, telescopic springs are fixedly connected to the four corners of the upper end face of the lower plate, and a forming plate is fixedly connected to the upper ends of the multiple telescopic springs; two guide rods are fixedly connected to the two sides of the middle of the lower plate correspondingly, the upper ends of the multiple guide rods penetrate through the forming plate and the upper plate correspondingly, the guide rods are slidably connected with the forming plate and the upper plate, and gold casting cavities are formed in the middle of the upper end of the forming plate and the middle of the lower end of the upper plate correspondingly; and when the lower end of the upper plate is in contact with the forming plate, the two metal casting cavities can form a cavity for storing electroplating liquid. Compared with the prior art, the problems that in the prior art, due to large-area direct contact between the lower end of the to-be-electroplated part and the inner wall of the mold cavity, flowing of electroplating liquid is blocked, an electroplated layer is uneven, and secondary electroplating is needed are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of metal processing, and particularly to a silver-cast gold forming device and its casting process. Background Art

[0002] In the long-established and ever-evolving field of metal processing and decoration, the silver-cast gold process has always occupied a crucial position with its unparalleled unique texture and luxurious appearance. This process ingeniously combines the pure luster of silver and the noble quality of gold. As a key link in this process, the electroplating process endows silver-cast gold products with unique charm. The electroplating process, as a technology that uses the principle of electrolysis to deposit a required metal or alloy layer on the surface of a metal, can not only accurately control the thickness and uniformity of the coating, but also significantly improve the corrosion resistance, wear resistance and decorative properties of the substrate.

[0003] In the prior art, a Chinese patent document with the publication number CN104562096A proposed a production process for hard gold ornaments, including a solid part and a hard gold shell coated on the outer surface of the solid part. The production process steps of the hard gold ornament are as follows: making a mold cavity for the product and applying silver oil on the cavity wall; electroplating a layer of copper on the mold cavity and then electroforming gold until the mold cavity is filled; removing the mold and the electroplated copper to obtain a 999.9 pure gold hard gold product; the obtained product is a finished product or a mold blank or a sheet of hard gold, and additional processing can be carried out. This process makes the product material hard gold and the part is a solid part. Although this makes the part more suitable for subsequent processing and ensures accuracy;

[0004] However, what is consistent with the traditional method is that there is a large area of direct contact between the lower end of the part to be electroplated and the inner wall of the mold cavity. This tight contact state, although ensuring the stability of the part to a certain extent during the electroplating process, also brings a series of problems that are not conducive to the electroplating quality. First of all, due to the large contact area, the flow of the electroplating solution in the mold cavity is significantly hindered, and it is difficult for the electroplating solution to fully penetrate into the tiny gaps between the part and the inner wall of the mold cavity, resulting in slow renewal of the electroplating solution in these areas and insufficient electroplating reaction. This not only affects the electroplating speed but also may lead to quality problems such as uneven thickness and poor adhesion of the electroplating layer in these areas. Secondly, in the areas directly in contact with the mold cavity, due to the restricted flow of the electroplating solution, it is often difficult to form a complete electroplating layer. These areas may still retain the original surface state of the substrate after electroplating, or only form a very thin and uneven electroplating layer. This not only affects the overall aesthetics of the part but also may reduce its corrosion resistance and wear resistance, thus affecting the service life and performance of the part. To solve this problem, it is usually necessary to take measures of secondary electroplating. That is, after the initial electroplating of the part, it is taken out of the mold cavity, and additional electroplating treatment is carried out on the parts directly in contact with the inner wall of the mold cavity. This not only increases the complexity and cost of the electroplating process but also prolongs the production cycle and reduces the production efficiency.

[0005] Furthermore, we disclose a silver-cast gold forming device and its casting process to meet the actual needs in the prior art where the large-area direct contact between the lower end of the part to be electroplated and the inner wall of the mold cavity leads to restricted flow of the electroplating solution, uneven electroplating layer, and the need for secondary electroplating. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a silver-cast gold forming device and its casting process to solve the problems in the prior art where the large-area direct contact between the lower end of the part to be electroplated and the inner wall of the mold cavity leads to restricted flow of the electroplating solution, uneven electroplating layer, and the need for secondary electroplating.

[0007] For the above purposes, the present invention provides a silver-cast gold forming device, including a lower plate and an upper plate. The upper plate is located above the lower plate. At the four corners of the upper end surface of the lower plate, telescopic springs are fixedly connected. The upper ends of the plurality of telescopic springs are fixedly connected to a forming plate. On both sides of the middle of the lower plate, two guide rods are fixedly connected. The upper ends of the plurality of guide rods penetrate through the forming plate and the upper plate, and the guide rods are slidably connected to the forming plate and the upper plate. In the middle of the upper end of the forming plate and the middle of the lower end of the upper plate, gold-casting cavities are respectively provided. When the lower end of the upper plate contacts the forming plate, the two gold-casting cavities can form a cavity for storing electroplating liquid. On one side of the middle of the forming plate, a jacking assembly is provided, and the jacking assembly is used to jack up the parts to be electroplated located inside the gold-casting cavity during electroplating. On the side of the forming plate away from the jacking assembly, a pressing assembly is provided, and the pressing assembly is used to maintain the close contact between the upper plate and the forming plate during electroplating.

[0008] Preferably, a liquid injection port is provided in the middle of the upper plate. The lower end of the liquid injection port is communicated with the gold-casting cavity. The liquid injection port is used for injecting electroplating liquid. On both sides of the upper end of the inner wall of the gold-casting cavity located on the upper plate, an electrode anode is fixedly connected. On the lower end surface of the upper plate and the upper end surface of the forming plate outside the gold-casting cavity, corresponding sealing strips and sealing grooves are respectively fixedly connected.

[0009] Preferably, the jacking assembly includes a sliding rod fixedly connected to one side of the middle of the upper end surface of the lower plate. A fixed ring is fixedly connected to the lower end of the outer wall of the sliding rod. On the outer side of the upper end surface of the fixed ring, a contact spring is fixedly connected. The upper end of the contact spring is fixedly connected to a pressing plate. A rectangular groove is provided in the middle of the upper part of the sliding rod. The pressing plate is slidably connected to the sliding rod through the rectangular groove. In the middle of the lower end surface of the pressing plate, a steel wire rope is fixedly connected. The lower end of the steel wire rope penetrates through the sliding rod. On one side end surface of the upper plate in the middle of the sliding rod, a sliding sleeve seat is fixedly connected. When the upper plate moves downward by a certain distance, it will drive the sliding sleeve seat to slide downward on the rectangular groove.

[0010] Preferably, the jacking assembly further includes a limiting sleeve fixedly connected to the middle of the lower end surface of the forming plate. A sliding column is slidably connected inside the limiting sleeve. In the middle of the upper end surface of the sliding column, a reset spring is fixedly connected. The upper end of the reset spring is fixedly connected to the forming plate. On the outer side of the middle of the upper end surface of the sliding column, a plurality of ejector posts are evenly spaced and fixedly connected. The upper end of the ejector post is spherical and extends into the gold-casting cavity. The gold-casting cavity is slidably connected to the forming plate and a sealing structure is provided at the connection. The end of the steel wire rope away from the pressing plate is fixedly connected to the middle of the lower end surface of the sliding column.

[0011] Preferably, two roller seats are fixedly connected to one side of the middle of the upper end surface of the lower plate. The outer wall of the steel wire rope contacts the rollers on the two roller seats.

[0012] Preferably, the extrusion assembly includes two compression tubes, and a mounting block is fixedly connected to the middle of the outer wall of the two compression tubes, and the lower end of the mounting block is fixedly connected to the lower plate. An open groove is opened in the middle of the end surfaces of both sides of the forming plate, and one end of the two compression tubes extends into the open groove respectively.

[0013] Preferably, the extrusion assembly also includes connecting seats fixedly connected to the two ends of the middle part of the end surface of one side of the upper plate, the lower ends of the two connecting seats are fixedly connected to connecting rods, the lower ends of the connecting rods are fixedly connected to piston plates, and the two piston plates are respectively coaxial with the side of the compression tube away from the opening groove. When the upper plate moves downward a certain distance, it will drive the piston plate to slide inside the compression tube.

[0014] Preferably, a slide plate is slidably connected inside one end of the compression tube located in the open groove, the outer diameters of the slide plate and the piston plate are the same as the inner diameter of the compression tube, the upper end of the slide plate is fixedly connected to a fixing rod, the upper end of the fixing rod is fixedly connected to a top plate, and a rubber pad is provided at the upper end of the top plate.

[0015] Preferably, a baffle is fixedly connected to the middle portion of the outer wall of the fixing rod near the upper end, and the diameter of the baffle is larger than that of the compression tube.

[0016] A silver-to-gold molding casting process, applied to the above-mentioned silver-to-gold molding device, comprises the following steps:

[0017] S1: Pre-treat the parts to be electroplated, including cleaning the surface of the parts and removing oil stains and oxide impurities;

[0018] S2: Place the pre-treated parts to be electroplated on the forming plate and position the parts in the appropriate position in the casting cavity;

[0019] S3: The upper plate is controlled to move downward a certain distance through the hydraulic rod, and the upper plate drives the sliding sleeve seat to slide downward on the rectangular groove of the sliding rod. The pressure plate overcomes the elastic force of the resistance spring and slides down along the sliding rod, tightening the wire rope, and the sliding column slides upward in the limit sleeve. The top column extends upward into the casting cavity to lift the parts. At the same time, the connecting rod drives the piston plate to slide in the compression tube, and the compressed gas pushes the slide plate to squeeze the top plate and the forming plate tightly;

[0020] S4: Add an appropriate amount of electroplating liquid into the casting cavity through the liquid injection port;

[0021] S5: Turn on the power supply, so that the electrode anode and the top column as the electrode cathode form an electroplating circuit, and the electroplating process begins. The metal ions in the electroplating solution are deposited on the surface of the part under the action of the electric field;

[0022] S6: After the electroplating is completed, the power is turned off, and the upper plate is controlled to move upward and reset through the hydraulic rod. The upper plate is separated from the pressure plate, and the resistance spring pushes the pressure plate to rise. The wire rope is relaxed, and the reset spring pushes the sliding column down. The top column withdraws from the casting cavity, and the parts fall back. At the same time, the piston plate slides in the opposite direction, the air pressure in the compression tube is reduced, the slide plate drops, and the top plate is separated from the forming plate;

[0023] S7: taking the electroplated parts out of the gold casting cavity;

[0024] S8: Post-process the electroplated parts, such as cleaning and drying, to remove the residual plating solution and other impurities on the surface of the parts.

[0025] Beneficial effects of the present invention:

[0026] 1. A lifting component is provided, and the lifting component lifts the part to be electroplated through a lifting column, thereby avoiding large-area direct contact between the lower end of the part and the inner wall of the mold cavity (i.e., the inner wall of the casting cavity), thereby eliminating the problem of obstruction of the flow of the plating solution caused by the large contact area. The plating solution can flow more smoothly in the casting cavity and fully penetrate into various parts of the part, ensuring the full progress of the electroplating reaction, and improving the uniformity and quality of the electroplating layer. Secondly, the lifting component enables the parts in direct contact with the model cavity to form a complete electroplating layer, avoiding the problem of incomplete or poor quality of the electroplating layer in these areas due to the limited flow of the electroplating solution, thereby improving the overall aesthetics, corrosion resistance and wear resistance of the parts, and extending the service life and performance of the parts. In addition, since the lifting component can automatically lift the parts during the electroplating process, there is no need for secondary electroplating, which simplifies the electroplating process, reduces production costs, and improves production efficiency. At the same time, the component has a reasonable structural design, is easy to operate, has high reliability, can adapt to parts to be electroplated of different specifications and shapes, and has strong versatility and practicality.

[0027] 2. An extrusion component is provided. The extrusion component realizes the close extrusion of the upper plate and the forming plate during the electroplating process through pneumatic transmission and mechanical linkage, effectively ensuring the sealing of the gold casting cavity, which avoids the problem of leakage of the plating solution due to poor sealing, and ensures the stability of the electroplating process and the quality of the electroplating. Secondly, the structural design of the extrusion component is reasonable and the operation is reliable. It can automatically realize the extrusion and separation actions during the electroplating process without manual intervention, thereby improving the production efficiency. In addition, the rubber pad provided on the upper end of the top plate not only enhances the sealing effect, but also can buffer the impact force between the top plate and the forming plate to a certain extent, protect the forming plate and the upper plate from damage, and extend the service life of the equipment. At the same time, this extrusion method is suitable for gold casting cavities of different specifications and shapes, has strong versatility and adaptability, and can meet the needs of various electroplating processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 Schematic diagram of the three-dimensional structure of the present invention;

[0030] Figure 2 Schematic diagram of the internal three-dimensional structure of the present invention;

[0031] Figure 3 Schematic diagram of the internal structure of the sliding rod of the present invention;

[0032] Figure 4 is Figure 2 the enlarged view of part A in

[0033] Figure 5 Schematic diagram of the partial three-dimensional structure of the present invention;

[0034] Figure 6 Schematic diagram of the partial three-dimensional structure of the jacking assembly of the present invention;

[0035] Figure 7 Schematic diagram of the three-dimensional structure of the compression tube of the present invention;

[0036] Figure 8 Schematic diagram of the three-dimensional structure of the fixed rod of the present invention.

[0037] The markings in the figure are:

[0038] 1. Upper plate; 2. Slide plate; 3. Lower plate; 4. Forming plate; 5. Telescopic spring; 6. Guide rod; 7. Liquid injection port; 8. Connecting seat; 9. Connecting rod; 10. Piston plate; 11. Slide sleeve seat; 12. Slide rod; 13. Rectangular groove; 14. Pressing plate; 15. Steel wire rope; 16. Resisting spring; 17. Fixed ring; 18. Casting cavity; 19. Anode electrode; 20. Sealing strip; 21. Sealing groove; 22. Compression tube; 23. Sliding column; 24. Return spring; 25. Installation block; 26. Roller seat; 27. Limiting sleeve; 28. Jacking column; 29. Top plate; 30. Fixed rod; 31. Baffle; 32. Open slot. Detailed implementation manners

[0039] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the following further elaborates on the present invention in conjunction with specific embodiments.

[0040] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention pertains. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships, and when the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0041] As Figures 1 to 8 shown, a silver-cast gold forming device includes a lower plate 3 and an upper plate 1. The upper plate 1 is located at the upper end of the lower plate 3. Four corners of the upper end surface of the lower plate 3 are fixedly connected with telescopic springs 5. The upper ends of a plurality of telescopic springs 5 are fixedly connected with a forming plate 4. Two guide rods 6 are fixedly connected to both sides of the middle part of the lower plate 3. The upper ends of a plurality of guide rods 6 penetrate through the forming plate 4 and the upper plate 1, and the guide rods 6 are slidably connected with the forming plate 4 and the upper plate 1. Casting gold cavities 18 are provided in the middle of the upper end of the forming plate 4 and the middle of the lower end of the upper plate 1. When the lower end of the upper plate 1 contacts the forming plate 4, the two casting gold cavities 18 can form a cavity for storing electroplating liquid. A jacking assembly is arranged on one side of the middle part of the forming plate 4. The jacking assembly is used to jack up the parts to be electroplated located inside the casting gold cavity 18 during electroplating. An extrusion assembly is arranged on the side of the forming plate 4 away from the jacking assembly. The extrusion assembly is used to maintain the close contact between the upper plate 1 and the forming plate 4 during electroplating;

[0042] The device is mainly composed of a lower plate 3 and an upper plate 1. At the four corners of the upper end of the lower plate 3, telescopic springs 5 are fixedly connected. The upper ends of the telescopic springs 5 are fixedly formed into a plate 4. On both sides of the middle of the lower plate 3, guide rods 6 are provided. The upper ends of the guide rods 6 penetrate through the forming plate 4 and the upper plate 1 and are slidably connected thereto. The upper plate 1 is controlled to move by a hydraulic rod, and the moving distance each time is the same, ensuring the accuracy and stability of the operation. A liquid injection port 7 is opened in the middle of the upper plate 1 and is communicated with a casting cavity 18 for injecting electroplating liquid. On both sides of the upper end of the inner wall of the casting cavity 18 on the upper plate 1, an electrode anode 19 is fixedly connected. The ejector pin 28 on the forming plate 4 serves as an electrode cathode. On one side of the middle of the forming plate 4, a jacking assembly is provided, including a slide rod 12, a fixed ring 17, a resisting spring 16, a pressing plate 14, a steel wire rope 15, a limiting sleeve 27, a sliding column 23, a reset spring 24, an ejector pin 28 and a roller seat 26, etc. When the upper plate 1 moves downward, the sliding column 23 is driven to move upward by the pressing plate 14 through the steel wire rope 15, and the ejector pin 28 jacks up the part to be electroplated, avoiding its large-area contact with the inner wall of the casting cavity 18 and ensuring the flow of electroplating liquid and electroplating quality. On the side of the forming plate 4 away from the jacking assembly, a pressing assembly is provided, including a compression tube 22, a mounting block 25, an opening groove 32, a connecting seat 8, a connecting rod 9, a piston plate 10, a sliding plate 2, a fixed rod 30, a top plate 29, a rubber pad and a baffle 31, etc. When the upper plate 1 moves downward, the piston plate 10 compresses the gas, pushing the sliding plate 2 to tightly press the top plate 29 against the forming plate 4 to ensure the sealing of the casting cavity 18. In addition, on the lower end surface of the upper plate 1 and the upper end surface of the forming plate 4 outside the casting cavity 18, a sealing strip 20 and a sealing groove 21 are respectively fixedly connected, further enhancing the sealing effect. Through the coordinated action of each structure, the device effectively solves many defects in the existing electroplating technology and improves the electroplating quality and production efficiency.

[0043] Further, as Figures 2 to 3 shown, a liquid injection port 7 is opened in the middle of the upper plate 1. The lower end of the liquid injection port 7 is communicated with the casting cavity 18. The liquid injection port 7 is used for injecting electroplating liquid. On both sides of the upper end of the inner wall of the casting cavity 18 on the upper plate 1, electrode anodes 19 are fixedly connected. On the lower end surface of the upper plate 1 and the upper end surface of the forming plate 4 outside the casting cavity 18, corresponding sealing strips 20 and sealing grooves 21 are respectively fixedly connected;

[0044] The liquid injection port 7 opened in the middle of the upper plate 1 is connected to the casting cavity 18, providing a convenient channel for the injection of electroplating liquid, enabling the electroplating liquid to smoothly enter the casting cavity 18, ensuring the normal progress of the electroplating process. The anodes 19 of the electrodes are fixedly connected to both sides of the upper end of the inner wall of the casting cavity 18 on the upper plate 1. The ejector pins 28 on this device can be used as the cathode of the electrode during actual use. The two cooperate with each other to form a complete electroplating circuit, providing the necessary electric field conditions for the electroplating reaction, prompting metal ions in the electroplating liquid to deposit on the surface of the parts to be electroplated, and realizing the silver casting process. The sealing strips 20 and the sealing grooves 21 that are fixedly connected to the outer sides of the casting cavity 18 on the lower end face of the upper plate 1 and the upper end face of the forming plate 4 respectively, when the upper plate 1 is in close contact with the forming plate 4, can be closely attached, effectively preventing the electroplating liquid from leaking from the outside of the casting cavity 18, ensuring the stability of the electroplating environment and the electroplating quality, and also helping to maintain the pressure stability in the casting cavity 18, further improving the electroplating effect. These structures work together to ensure that the silver casting forming device can efficiently and stably complete the electroplating work during actual use.

[0045] Furthermore, as Figures 1 to 6 shown, the jacking assembly includes a slide bar 12 fixedly connected to one side of the middle part of the upper end face of the lower plate 3. A fixed ring 17 is fixedly connected to the lower end of the outer wall of the slide bar 12. A contact spring 16 is fixedly connected to the outer side of the upper end face of the fixed ring 17. The upper end of the contact spring 16 is fixedly connected to a pressure plate 14. A rectangular groove 13 is opened in the upper middle part of the slide bar 12. The pressure plate 14 is slidably connected to the slide bar 12 through the rectangular groove 13. A steel wire rope 15 is fixedly connected to the middle part of the lower end face of the pressure plate 14. The lower end of the steel wire rope 15 penetrates through the slide bar 12. A slide sleeve seat 11 is fixedly connected to the middle part of one side end face of the upper plate 1 where the slide bar 12 is located. When the upper plate 1 moves downward by a certain distance, it will drive the slide sleeve seat 11 to slide downward on the rectangular groove 13. The jacking assembly further includes a limit sleeve 27 fixedly connected to the middle part of the lower end face of the forming plate 4. A sliding column 23 is slidably connected inside the limit sleeve 27. A return spring 24 is fixedly connected to the middle part of the upper end face of the sliding column 23. The upper end of the return spring 24 is fixedly connected to the forming plate 4. A plurality of ejector pins 28 are evenly spaced and fixedly connected to the outer side of the middle part of the upper end face of the sliding column 23. The upper end of the ejector pin 28 is spherical and extends into the casting cavity 18. The casting cavity 18 is slidably connected to the forming plate 4 and a sealing structure is provided at the connection. The end of the steel wire rope 15 away from the pressure plate 14 is fixedly connected to the middle part of the lower end face of the sliding column 23. Two roller seats 26 are fixedly connected to one side of the middle part of the upper end face of the lower plate 3. The outer wall of the steel wire rope 15 is in contact with the rollers on the two roller seats 26;

[0046] In the initial state, the resistance spring 16 is in a naturally extended state, pushing the pressure plate 14 to a relatively high position. At this time, although the wire rope 15 is in a taut state, the sliding column 23 is in a lower position in the limit sleeve 27 under the action of the return spring 24, and the top column 28 does not extend into the casting cavity 18. When the electroplating operation is performed, the upper plate 1 moves downward. After moving a certain distance, the upper plate 1 contacts the pressure plate 14. As the upper plate 1 continues to apply downward pressure, the pressure plate 14 overcomes the elastic force of the resistance spring 16 and slides downward along the slide rod 12. In this process, the originally taut state of the wire rope 15 gradually loosens. Since the other end of the wire rope 15 is fixedly connected to the middle part of the lower end face of the sliding column 23, the wire rope 15 becomes loose, which reduces the downward pulling force on the sliding column 23 in the limit sleeve 27. At this time, the elastic force of the return spring 24 occupies the main The guide pushes the sliding column 23 to slide upward, and the upward movement of the sliding column 23 drives the top column 28 to extend upward into the gold casting cavity 18, thereby lifting the part to be electroplated located inside the gold casting cavity 18, avoiding large-scale direct contact between the lower end of the part and the inner wall of the gold casting cavity 18, ensuring that the electroplating liquid can flow smoothly. After the electroplating is completed, the upper plate 1 moves upward and resets, and no longer contacts the pressure plate 14. At this time, the resistance spring 16 pushes the pressure plate 14 to slide upward, and the wire rope 15 is tightened again. As the pressure plate 14 rises, the wire rope 15 pulls the sliding column 23 to move downward, the reset spring 24 is stretched, and the top column 28 withdraws from the gold casting cavity 18, and the part to be electroplated falls back to its original position. During the whole process, the roller on the roller seat 26 plays a limiting and guiding role for the wire rope 15, ensuring the stability and reliability of the wire rope 15 during the transmission process.

[0047] Further, such as Figure 1 , Figure 2 , Figure 7 , Figure 8 As shown, the extrusion assembly includes two compression tubes 22, the middle of the outer wall of the two compression tubes 22 are fixedly connected with a mounting block 25, the lower end of the mounting block 25 is fixedly connected to the lower plate 3, the middle of the end faces of both sides of the forming plate 4 are provided with an open groove 32, one end of the two compression tubes 22 are respectively extended into the open groove 32, the extrusion assembly also includes a connecting seat 8 fixedly connected to both ends of the middle of the end face of one side of the upper plate 1, the lower ends of the two connecting seats 8 are fixedly connected with a connecting rod 9, the lower end of the connecting rod 9 is fixedly connected with a piston plate 10, and the two piston plates 10 are respectively connected to the compression tube 22 The side away from the opening groove 32 is coaxial. When the upper plate 1 moves downward for a certain distance, it will drive the piston plate 10 to slide inside the compression tube 22. The compression tube 22 is located in the opening groove 32. The end of the inner part is slidably connected with the slide plate 2. The outer diameters of the slide plate 2 and the piston plate 10 are the same as the inner diameter of the compression tube 22. The upper end of the slide plate 2 is fixedly connected with a fixing rod 30. The upper end of the fixing rod 30 is fixedly connected with a top plate 29. The upper end of the top plate 29 is provided with a rubber pad. The middle part of the outer wall of the fixing rod 30 is fixedly connected with a baffle plate 31 near the upper end. The diameter of the baffle plate 31 is larger than the compression tube 22.

[0048] In the initial state, the slide plate 2 in the compression tube 22 is located near the opening groove 32 under the action of its own gravity and possible weak external force. There is a certain gap between the top plate 29 and the upper end surface of the forming plate 4. When the upper plate 1 moves downward, the connecting seat 8 drops accordingly, driving the connecting rod 9 and the piston plate 10 to slide in the compression tube 22 toward the opening groove 32. As the piston plate 10 moves, the gas between the piston plate 10 and the slide plate 2 in the compression tube 22 is compressed, and the air pressure increases. This increased air pressure pushes the slide plate 2 to slide in the direction away from the opening groove 32. The upper plate 1 and the molding plate 4 are tightly squeezed to ensure the sealing of the casting cavity 18 during the electroplating process and prevent leakage of the electroplating liquid. When the electroplating is completed and the upper plate 1 moves upward, the piston plate 10 slides in the opposite direction in the compression tube 22, and the air pressure in the compression tube 22 decreases. The slide plate 2 slides toward the open groove 32 under the action of its own gravity and possible external restoring force, and the top plate 29 drops accordingly and separates from the molding plate 4.

[0049] An embodiment of the present invention further provides a silver-cast-gold molding casting process, which is applied to the above-mentioned silver-cast-gold molding device, and includes the following steps:

[0050] S1: Pre-treat the parts to be electroplated, including cleaning the surface of the parts, removing impurities such as oil, oxides, etc., and ensuring that the surface of the parts is clean and smooth to ensure good bonding between the electroplating layer and the substrate;

[0051] S2: placing the pre-treated parts to be electroplated on the forming plate 4 and positioning the parts at a suitable position in the casting cavity 18;

[0052] S3: The upper plate 1 is controlled to move downward a certain distance by the hydraulic rod, and the upper plate 1 drives the sliding sleeve seat 11 to slide downward on the rectangular groove 13 of the sliding rod 12, and the pressing plate 14 overcomes the elastic force of the resistance spring 16 and slides down along the sliding rod 12, tightening the wire rope 15, and the sliding column 23 slides upward in the limiting sleeve 27, and the top column 28 extends upward into the casting cavity 18 to lift the parts, and at the same time, the connecting rod 9 drives the piston plate 10 to slide in the compression tube 22, and the compressed gas pushes the slide plate 2 to make the top plate 29 and the forming plate 4 tightly squeezed to ensure the sealing of the casting cavity 18;

[0053] S4: Add an appropriate amount of electroplating liquid into the casting cavity 18 through the liquid injection port 7;

[0054] S5: Turn on the power supply, so that the electrode anode 19 and the top column 28 as the electrode cathode form an electroplating circuit, and the electroplating process begins. The metal ions in the electroplating solution are deposited on the surface of the part under the action of the electric field;

[0055] S6: After the electroplating is completed, the power is turned off, and the upper plate 1 is controlled by the hydraulic rod to move upward and reset. The upper plate 1 is separated from the pressure plate 14, and the resistance spring 16 pushes the pressure plate 14 to rise, the wire rope 15 is relaxed, and the reset spring 24 pushes the sliding column 23 to descend, and the top column 28 withdraws from the casting cavity 18, and the parts fall back. At the same time, the piston plate 10 slides in the opposite direction, the air pressure in the compression tube 22 is reduced, the slide plate 2 descends, and the top plate 29 is separated from the forming plate 4;

[0056] S7: taking out the electroplated parts from the gold casting cavity 18;

[0057] S8: Post-process the electroplated parts by cleaning and drying them to remove the residual plating solution and other impurities on the surface of the parts.

[0058] Compared with the prior art, the above-mentioned silver-cast gold molding casting process is adopted: the parts are lifted up by the lifting assembly during electroplating, thereby avoiding large-area contact between the parts and the inner wall of the gold casting cavity 18, allowing the electroplating liquid to flow smoothly, ensuring the full progress of the electroplating reaction, making the electroplating layer more uniform, and improving the electroplating quality. At the same time, the extrusion assembly ensures the sealing of the gold casting cavity 18, prevents leakage of the electroplating liquid, and further stabilizes the electroplating environment. Moreover, this process step does not require secondary electroplating, simplifies the operation process, reduces production costs, and improves production efficiency. In addition, the structural design of each component is reasonable and the operation is reliable. It can adapt to parts of different specifications and shapes, has strong versatility and practicality, and effectively solves many defects in the prior art.

[0059] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0060] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A silver-cast gold forming device, characterized in that: It includes a lower plate (3) and an upper plate (1). The upper plate (1) is located at the upper end of the lower plate (3). At the four corners of the upper end face of the lower plate (3), telescopic springs (5) are fixedly connected. The upper ends of the plurality of telescopic springs (5) are fixedly connected to a forming plate (4). On both sides of the middle of the lower plate (3), two guide rods (6) are fixedly connected. The upper ends of the plurality of guide rods (6) penetrate through the forming plate (4) and the upper plate (1), and the guide rods (6) are slidably connected to the forming plate (4) and the upper plate (1). In the middle of the upper end of the forming plate (4) and in the middle of the lower end of the upper plate (1), casting cavities (18) are respectively provided. When the lower end of the upper plate (1) contacts the forming plate (4), the two casting cavities (18) can form a cavity for storing electroplating liquid. On one side of the middle of the forming plate (4), a jacking assembly is provided, and the jacking assembly is used to jack up the parts to be electroplated inside the casting cavity (18) during electroplating. On the side of the forming plate (4) away from the jacking assembly, a pressing assembly is provided, and the pressing assembly is used to maintain the close contact between the upper plate (1) and the forming plate (4) during electroplating.

2. A silver-cast gold forming device according to claim 1, characterized in that: A liquid injection port (7) is provided in the middle of the upper plate (1). The lower end of the liquid injection port (7) is communicated with the casting cavity (18). The liquid injection port (7) is used for injecting electroplating liquid. On both sides of the upper end of the inner wall of the casting cavity (18) located on the upper plate (1), electrode anodes (19) are fixedly connected. On the lower end face of the upper plate (1) and on the upper end face of the forming plate (4) outside the casting cavity (18), corresponding sealing strips (20) and sealing grooves (21) are respectively fixedly connected.

3. The silver-casting and gold-forming device according to claim 1, wherein: The jacking assembly includes a slide rod (12) fixedly connected to one side of the middle of the upper end face of the lower plate (3). A fixed ring (17) is fixedly connected to the lower end of the outer wall of the slide rod (12). A contact spring (16) is fixedly connected to the outer side of the upper end face of the fixed ring (17). The upper end of the contact spring (16) is fixedly connected to a pressing plate (14). A rectangular groove (13) is provided in the middle of the upper part of the slide rod (12). The pressing plate (14) is slidably connected to the slide rod (12) through the rectangular groove (13). A steel wire rope (15) is fixedly connected to the middle of the lower end face of the pressing plate (14). The lower end of the steel wire rope (15) penetrates through the slide rod (12). A slide sleeve seat (11) is fixedly connected to the middle of one side end face of the upper plate (1) where the slide rod (12) is located. When the upper plate (1) moves downward by a certain distance, it will drive the slide sleeve seat (11) to slide downward on the rectangular groove (13).

4. A silver-cast gold forming device according to claim 3, characterized in that: The jacking assembly further includes a limit sleeve (27) fixedly connected to the middle of the lower end face of the forming plate (4). A sliding column (23) is slidably connected inside the limit sleeve (27). A reset spring (24) is fixedly connected to the middle of the upper end face of the sliding column (23). The upper end of the reset spring (24) is fixedly connected to the forming plate (4). A plurality of ejector pins (28) are fixedly connected to the outside of the middle of the upper end face of the sliding column (23) at equal intervals. The upper end of the ejector pin (28) is spherical and extends into the casting cavity (18). The casting cavity (18) is slidably connected to the forming plate (4), and a sealing structure is provided at the connection. One end of the steel wire rope (15) away from the pressing plate (14) is fixedly connected to the middle of the lower end face of the sliding column (23).

5. The silver-cast gold forming device according to claim 4, wherein: On one side of the middle of the upper end face of the lower plate (3), two roller seats (26) are fixedly connected. The outer wall of the steel wire rope (15) is in contact with the rollers on the two roller seats (26).

6. The silver-casting and gold-forming device according to claim 1, characterized in that: The extrusion assembly includes two compression tubes (22). Mounting blocks (25) are fixedly connected to the middle of the outer walls of the two compression tubes (22). The lower end of the mounting block (25) is fixedly connected to the lower plate (3). Open slots (32) are formed in the middle of both side end faces of the forming plate (4). One end of each of the two compression tubes (22) extends into the open slot (32) respectively.

7. A silver-casting and gold-forming device according to claim 6, characterized in that: The extrusion assembly further includes connection seats (8) fixedly connected to both ends of the middle of one side end face of the upper plate (1). Connecting rods (9) are fixedly connected to the lower ends of the two connection seats (8). A piston plate (10) is fixedly connected to the lower end of the connecting rod (9). The two piston plates (10) are coaxial with the sides of the compression tubes (22) away from the open slots (32). When the upper plate (1) moves downward by a certain distance, the piston plate (10) will be driven to slide inside the compression tube (22).

8. A silver-casting and gold-forming device according to claim 7, characterized in that: A slide plate (2) is slidably connected inside one end of the compression tube (22) located in the open slot (32). The outer diameters of the slide plate (2) and the piston plate (10) are the same as the inner diameter of the compression tube (22). A fixed rod (30) is fixedly connected to the upper end of the slide plate (2). A top plate (29) is fixedly connected to the upper end of the fixed rod (30). A rubber pad is provided on the upper end of the top plate (29).

9. A silver-cast gold forming device according to claim 8, characterized in that: A baffle (31) is fixedly connected to the middle of the outer wall of the fixed rod (30) near the upper end. The diameter of the baffle (31) is larger than that of the compression tube (22).

10. A silver-cast gold forming and casting process, applied to the silver-cast gold forming device according to any one of claims 1-9, characterized in that: It includes the following steps: S1: Pretreat the parts to be electroplated, including cleaning the surface of the parts to remove oil stains and oxides; S2: Place the pretreated parts to be electroplated on the forming plate (4), and make the parts located at a suitable position inside the casting cavity (18); S3: The upper plate (1) is controlled to move downward a certain distance by a hydraulic rod, and the upper plate (1) drives the sliding sleeve seat (11) to slide downward on the rectangular groove (13) of the sliding rod (12). The pressing plate (14) overcomes the elastic force of the resistance spring (16) and slides down along the sliding rod (12), tightens the steel wire rope (15), and the sliding column (23) slides upward in the limiting sleeve (27). The top column (28) extends upward into the casting cavity (18) to lift the parts. At the same time, the connecting rod (9) drives the piston plate (10) to slide in the compression tube (22), and the compressed gas pushes the slide plate (2) to make the top plate (29) and the forming plate (4) tightly squeezed; S4: Adding an appropriate amount of electroplating liquid into the gold casting cavity (18) through the liquid injection port (7); S5: Turning on the power supply, so that the electrode anode (19) and the top column (28) serving as the electrode cathode form an electroplating circuit, starting the electroplating process, and the metal ions in the electroplating solution are deposited on the surface of the part under the action of the electric field; S6: After the electroplating is completed, the power is turned off, and the upper plate (1) is controlled by the hydraulic rod to move upward and reset. The upper plate (1) is separated from the pressure plate (14), and the resistance spring (16) pushes the pressure plate (14) to rise. The wire rope (15) is relaxed, and the reset spring (24) pushes the sliding column (23) to descend. The top column (28) withdraws from the casting cavity (18), and the parts fall back. At the same time, the piston plate (10) slides in the opposite direction, the air pressure in the compression tube (22) decreases, the slide plate (2) descends, and the top plate (29) is separated from the forming plate (4); S7: taking the electroplated parts out of the gold casting cavity (18); S8: Post-process the electroplated parts by cleaning and drying them to remove the residual plating solution and other impurities on the surface of the parts.

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