Hard gold jewelry surface wear-resistant coating treatment device

Abstract

The present application relates to hard gold jewelry processing technical field, and disclose hard gold jewelry surface wear-resistant coating treatment device, including bottom plate, the present application adopts special multistage automatic pretreatment process, through ultrasonic cleaning, plasma activation and other processes, remove the oil stains, oxide layer and impurities on the surface of hard gold jewelry, and carry out micro roughening treatment to the substrate, increase the coating bonding area. With the composite coating structure, effectively solve the problem of coating easy cracking, falling, avoid the coating failure caused by incomplete pretreatment, compared with manual pretreatment, greatly improve the processing effect and efficiency, at the same time, adopt flexible adjustable clamping mechanism, can according to the size, shape of jewelry flexible adjustment clamping force and position, avoid the rigid clamping cause indentation, scratch, solve the existing device clamping improper jewelry surface damage problem. The mechanism can ensure that the clamping is stable during plating, prevent jewelry displacement from affecting the quality of the coating, make the plating process more reliable, the appearance and performance of the finished product more stable.

Description

Technical Field

[0001] This invention relates to the field of hard gold jewelry processing technology, specifically to a device for treating the surface of hard gold jewelry with a wear-resistant coating. Background Technology

[0002] Hard gold jewelry (such as 3D hard gold and 5D hard gold) has become a mainstream product in the current jewelry market due to its advantages such as hardness, rich design, and lightweight. However, hard gold jewelry is still made of gold, and its surface hardness is relatively low (Mohs hardness is about 2.5-3). During daily wear, it is easily subjected to friction and impact, resulting in scratches and wear on the surface, affecting the appearance and lifespan of the jewelry. At the same time, the surface of hard gold jewelry is easily corroded by sweat, cosmetics, etc., resulting in oxidation and darkening, which further reduces the added value of the product.

[0003] Existing technologies typically employ electroplating and spraying to prepare wear-resistant coatings on the surface of hard gold jewelry. However, current coating processing equipment suffers from several drawbacks: First, the adhesion between the coating and the hard gold substrate is weak, leading to cracking and peeling, resulting in poor wear resistance. Second, the coating deposition uniformity is poor, especially for complex-shaped hard gold jewelry (such as openwork or carved pieces), where uneven coating thickness and incomplete plating are common. Third, the jewelry clamping method during processing is unstable, easily causing surface damage and affecting the appearance. Furthermore, existing technologies often employ a single coating structure, making it difficult to balance coating adhesion and wear resistance. Moreover, the coating processes are mostly single PVD or CVD processes, which cannot achieve dense coating deposition.

[0004] Research on existing related technologies revealed the following specific defects in existing coating treatment devices: The treatment device disclosed in prior art document CN204752855U has a fixed coating mechanism, which cannot flexibly adjust the coating angle and distance according to the shape of the jewelry. For hard gold jewelry with complex structures such as openwork and carving, it is prone to problems such as incomplete coating and uneven coating thickness. Furthermore, it lacks a dedicated pretreatment mechanism, relying solely on simple wiping to remove surface impurities, resulting in incomplete pretreatment and weak adhesion between the coating and the substrate, making it prone to peeling. The treatment device disclosed in prior art document CN114807624B uses a single... The coating process has a simple coating structure, which can improve wear resistance to a certain extent, but it cannot take into account the density of the coating and the adhesion to the substrate. Moreover, its clamping mechanism is rigid and the clamping force cannot be adjusted, which can easily cause damage such as indentations and scratches to the surface of hard gold jewelry. The processing device disclosed in the prior art document CN110172675A only uses alcohol to clean the surface of hard gold jewelry in an ultrasonic device for pretreatment, which will lead to incomplete pretreatment and weak adhesion between the coating and the substrate. In addition, the pretreatment of hard gold jewelry in the above-mentioned prior art documents is mostly done manually, resulting in low pretreatment efficiency of the device. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a wear-resistant coating treatment device for hard gold jewelry surfaces, which solves the problems of weak adhesion between the coating and the hard gold substrate, low pretreatment efficiency, poor coating deposition uniformity, and unstable jewelry clamping in existing treatment devices.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a hard gold jewelry surface wear-resistant coating treatment device, including a base plate, wherein a pretreatment component and a composite coating component are provided on the base plate, the pretreatment component is used to remove oil stains, oxide layer and impurities from the surface of hard gold jewelry, and the composite coating component is used to sequentially deposit a transition coating and a main wear-resistant coating on the surface of the pretreated hard gold jewelry. The pretreatment component is used to improve pretreatment efficiency. The pretreatment component includes an ultrasonic cleaning unit, a support frame, a drying hood, and a micro-etching activation unit. The ultrasonic cleaning unit includes a cleaning tank, and the micro-etching activation unit includes an activation tank. Two synchronous pulleys are symmetrically installed at the end of the support frame away from the base plate. A toothed belt is sleeved on both synchronous pulleys. Multiple telescopic rods are uniformly fixedly connected to the toothed belt in the circumference. A support plate is fixedly connected to the output end of the telescopic rod. A rotating motor is fixedly connected to the support plate. A grid plate is fixedly connected to the output end of the rotating motor. The cleaning tank and the activation tank are both adapted to the grid plate. The composite coating assembly is used to improve coating uniformity. The assembly includes a gas storage tank, a coating chamber, a vacuum pump, and a fixed base. A disc is fixedly connected to the end of the fixed base away from the rotating shaft. Multiple rotating grooves are evenly distributed on the disc. A rotating plate is rotatably connected within each rotating groove. Multiple rotating frames are evenly fixedly connected around the circumference of the disc. A gripper is rotatably connected within each rotating frame, and the rotating plate is rotatably connected to the gripper. A hydraulic rod is fixedly connected to the upper surface of the fixed base. A moving plate is fixedly connected to the output end of the hydraulic rod, and the rotating plate is rotatably connected to the moving plate. The hydraulic rod extends to drive the multiple grippers to clamp the hard gold jewelry. A slide rail is fixedly connected inside the coating chamber. A first slide block is slidably connected inside the slide rail. A first threaded rod is rotatably connected inside the slide rail and threadedly connected to the first slide block. A second vertical rail is rotatably connected to the upper surface of the first slide block. A second slide block is slidably connected inside the second vertical rail, and a second threaded rod is rotatably connected inside the second vertical rail and threadedly connected to the second slide block.

[0007] Preferably, the coating chamber has two first vertical rails fixedly connected, a lifting seat is slidably connected in the first vertical rail, a third threaded rod is rotatably connected in the first vertical rail, and the third threaded rod is threadedly connected to the lifting seat. A reversing plate is rotatably connected to one end of the lifting seat near the disc, and a target material is fixedly connected to both ends of the reversing plate. A vacuum tube is fixedly connected to the input end of the vacuum pump, and the vacuum pump is connected to the coating chamber through the vacuum tube.

[0008] Preferably, two side plates are fixedly connected to the upper surface of the base plate, and two rollers are rotatably connected between the two side plates. A conveyor belt is fitted on both rollers, and the drying hood is fixedly connected to the side plates.

[0009] Preferably, an adjusting plate is fixedly connected to one end of the drying hood near the conveyor belt, a rotary motor is fixedly connected to the adjusting plate, and two sliding grooves are symmetrically opened at one end of the adjusting plate near the conveyor belt. A slider is slidably connected in the sliding groove, and a baffle is fixedly connected to the slider.

[0010] Preferably, the output end of the rotary motor is fixedly connected to a rotating plate, and the two ends of the rotating plate are rotatably connected to hinge plates, which are rotatably connected to the slider.

[0011] Preferably, the coating chamber has two openings around its circumference, and the coating chamber has two mounting slots connected to the openings. An electric actuator is fixedly connected in the mounting slot, and a sealing plate is fixedly connected to the output end of the electric actuator, and the sealing plate is adapted to the opening.

[0012] Preferably, a slide rail is fixedly connected inside the coating chamber, a first slide block is slidably connected inside the slide rail, a first threaded rod is rotatably connected inside the slide rail and threadedly connected to the first slide block, a second vertical rail is rotatably connected to the upper surface of the first slide block, a second slide block is slidably connected inside the second vertical rail, a second threaded rod is rotatably connected inside the second vertical rail and threadedly connected to the second slide block.

[0013] Preferably, a rotating shaft is rotatably connected inside the coating chamber, and the rotating shaft extends through the coating chamber to the outside. One end of the rotating shaft inside the coating chamber is fixedly connected to a fixed seat. A connecting plate is fixedly connected to the end of the second slide away from the second vertical rail. A clamping plate is fixedly connected to the lower surface of the connecting plate. Multiple telescopic grooves are evenly provided at the end of the clamping plate away from the connecting plate. Telescopic blocks are slidably connected in the telescopic grooves. A clamping plate is fixedly connected to the telescopic blocks.

[0014] Preferably, the clamping plate has a cavity, and a rotating disk is rotatably connected to the cavity. The rotating disk has multiple arc-shaped grooves evenly distributed on it. A pull column is fixedly connected to one end of the telescopic block near the rotating disk, and the pull column is slidably connected to the arc-shaped grooves.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In this invention, the problems of incomplete pretreatment, weak adhesion between the coating and the hard gold substrate, and low pretreatment efficiency are solved by setting up a pretreatment component: This invention sets up a dedicated multi-stage automated pretreatment process, which thoroughly removes oil, oxide layer and impurities from the surface of hard gold jewelry through multiple automated processes such as ultrasonic cleaning and plasma activation. At the same time, the surface of the hard gold substrate is micro-roughened to increase the bonding area between the coating and the substrate. Combined with the composite coating structure design, it effectively solves the defects of easy cracking and peeling of the coating, significantly improves the coating adhesion and wear resistance, and avoids the coating failure problem caused by incomplete pretreatment. Compared with manual pretreatment, it greatly improves the pretreatment effect and device pretreatment efficiency.

[0016] 2. In this invention, a composite coating process is used to sequentially deposit a transition coating and a main wear-resistant coating on the surface of hard gold jewelry. Combined with an adaptive clamping component and a rotary drive structure, the coating angle can be flexibly adjusted according to the shape of the hard gold jewelry (especially complex shapes such as hollow and carved designs). With the uniform feeding and rotary clamping structure, the coating is deposited evenly, ensuring that the appearance and texture of the jewelry are consistent.

[0017] 3. In this invention, a flexible and adjustable clamping mechanism is adopted, which can flexibly adjust the clamping force and clamping position according to the size and shape of the jewelry, avoiding the indentation and scratches caused by rigid clamping on the surface of hard gold jewelry, solving the problem of damage to the surface of jewelry caused by unreasonable clamping method of existing devices, while ensuring clamping stability and avoiding the displacement of jewelry during the coating process, which affects the coating quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the hard gold jewelry surface wear-resistant coating treatment device of the present invention; Figure 2 This is a schematic diagram of the support frame structure of the hard gold jewelry surface wear-resistant coating treatment device of the present invention; Figure 3 This is a cross-sectional view of the drying hood of the hard gold jewelry surface wear-resistant coating treatment device of the present invention; Figure 4 This is a cross-sectional view of the adjusting plate of the hard gold jewelry surface wear-resistant coating treatment device of the present invention; Figure 5 This is a schematic diagram of the gas storage tank structure of the hard gold jewelry surface wear-resistant coating treatment device of the present invention; Figure 6 This is a cross-sectional view of the coating chamber of the hard gold jewelry surface wear-resistant coating treatment device of the present invention; Figure 7 This is a cross-sectional view of the slide rail of the hard gold jewelry surface wear-resistant coating treatment device of the present invention; Figure 8This is a cross-sectional view of the clamping structure of the hard gold jewelry surface wear-resistant coating treatment device of the present invention; Figure 9 This is a cross-sectional view of the first vertical rail of the hard gold jewelry surface wear-resistant coating treatment device of the present invention.

[0019] In the diagram: 1. Base plate; 2. Ultrasonic cleaning unit; 3. Support frame; 4. Air tank; 5. Drying hood; 6. Coating chamber; 7. Vacuum tube; 8. Toothed belt; 9. Telescopic rod; 10. Micro-etching activation unit; 11. Side plate; 12. Synchronous pulley; 13. Support plate; 14. Grid plate; 15. Rotary motor; 16. Cleaning tank; 17. Activation tank; 18. Roller; 19. Conveyor belt; 20. Adjusting plate; 21. Rotary motor; 22. Sliding groove; 23. Rotating plate; 24. Hinge plate; 25. Slider; 26. Baffle; 27. Vacuum pump; 28. Chamber opening; 29. ​​Air inlet pipe; 30. Mounting groove; 31. Electric actuator; 32. Sealing plate; 3. Fixed frame; 34. Pulse bias ionizer; 35. Slide rail; 36. First vertical rail; 37. Second vertical rail; 38. Rotating shaft; 39. Clamping plate; 40. First slide block; 41. First threaded rod; 42. Hydraulic rod; 43. Second slide block; 44. Second threaded rod; 45. Connecting plate; 46. Telescopic groove; 47. Telescopic block; 48. Clamping plate; 49. Cavity; 50. Rotating disk; 51. Pull column; 52. Arc groove; 53. Lifting seat; 54. Third threaded rod; 55. Reversing plate; 56. Target material; 57. Fixed seat; 58. Disc; 59. Rotating groove; 60. Gripper; 61. Moving plate; 62. Rotating plate; 63. Rotating frame. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] refer to Figures 1-9 The hard gold jewelry surface wear-resistant coating treatment device shown includes a base plate 1, on which a pretreatment component and a composite coating component are provided. The pretreatment component is used to remove oil, oxide layer and impurities from the surface of the hard gold jewelry, and the composite coating component is used to sequentially deposit a transition coating and a main wear-resistant coating on the pretreated surface of the hard gold jewelry. A specific embodiment is shown below: Example 1 The pretreatment component is used to improve pretreatment efficiency. The pretreatment component includes an ultrasonic cleaning unit 2, a support frame 3, a drying hood 5, and a micro-etching activation unit 10. The ultrasonic cleaning unit 2 includes a cleaning tank 16, and the micro-etching activation unit 10 includes an activation tank 17. Two synchronous pulleys 12 are symmetrically installed on the end of the support frame 3 away from the base plate 1. A toothed belt 8 is commonly fitted on the two synchronous pulleys 12. Multiple telescopic rods 9 are uniformly fixedly connected to the toothed belt 8 in the circumference. A support plate 13 is fixedly connected to the output end of the telescopic rods 9. A rotating motor 15 is fixedly connected to the support plate 13. A grid plate 14 is fixedly connected to the output end of the rotating motor 15. The cleaning tank 16 and the activation tank 17 are both adapted to the grid plate 14.

[0022] A servo motor, matched with the synchronous pulley 12, drives it to rotate, placing the hard gold jewelry requiring coating treatment onto the grid plate 14. As the grid plate 14 moves above the cleaning tank 16, the telescopic rod 9 places the hard gold jewelry on the grid plate 14 into the cleaning tank 16. The spacing between every two grid plates 14 is adapted to the distance between the cleaning tank 16 and the activation tank 17. At the same time, the cleaning tank 16 contains a neutral and environmentally friendly cleaning solution that does not contain cyanide, strong acid, or other harmful substances, thus avoiding corrosion of the hard gold material. The ultrasonic generator installed on the bottom wall of the cleaning tank 16 starts working. The frequency adjustment range of the ultrasonic generator is 20-80kHz, which can be adjusted according to the degree of oil stains on the surface of the jewelry. High-frequency ultrasound can effectively remove stubborn oil stains and impurities from the surface of the jewelry. The constant temperature heating component installed on the cleaning tank 16 can control the temperature of the cleaning solution at 30-50℃, improving the cleaning effect and avoiding incomplete cleaning due to low temperature.

[0023] After cleaning in the cleaning tank 16, the telescopic rod 9 retracts to raise the height of the grid plate 14. The servo motor drives the synchronous pulley 12 to rotate, moving the hard gold jewelry treated in the cleaning tank 16 above the activation tank 17. The telescopic rod 9 extends to place the hard gold jewelry on the grid plate 14 into the activation tank 17. The activation tank 17 contains a low-concentration micro-etching solution, which is a mixed solution of dilute nitric acid and citric acid, with a concentration controlled at 1%-3%. This solution can slightly corrode the surface of the hard gold jewelry, removing the surface oxide layer and forming a tiny uneven structure on the surface, increasing the contact area between the coating and the substrate and improving the adhesion. The precise dripping component of the activation tank 17 can automatically adjust the dripping speed of the micro-etching solution according to the size of the jewelry to avoid excessive micro-etching solution leading to over-corrosion of the hard gold substrate. The stirring component of the activation tank 17 ensures uniform distribution of the micro-etching solution, ensuring uniform micro-etching on the surface of the jewelry. The micro-etching time is controlled at 30-60 seconds, balancing the activation effect and substrate protection.

[0024] Example 2 Two side plates 11 are fixedly connected to the upper surface of the base plate 1. Two rollers 18 are rotatably connected between the two side plates 11. A conveyor belt 19 is mounted on both rollers 18. The drying hood 5 is fixedly connected to the side plates 11. An adjusting plate 20 is fixedly connected to one end of the drying hood 5 near the conveyor belt 19. A rotary motor 21 is fixedly connected to the adjusting plate 20. Two sliding grooves 22 are symmetrically opened at one end of the adjusting plate 20 near the conveyor belt 19. A slider 25 is slidably connected in the sliding groove 22. A baffle 26 is fixedly connected to the slider 25. A rotating plate 23 is fixedly connected to the output end of the rotary motor 21. Hinges 24 are rotatably connected to both ends of the rotating plate 23. The hinges 24 are rotatably connected to the slider 25.

[0025] After activation in the activation tank 17, the telescopic rod 9 retracts to raise the height of the grid plate 14. The servo motor drives the synchronous pulley 12 to rotate, moving the grid plate 14 above the conveyor belt 19. The rotating motor 15 mounted on the support plate 13 rotates, causing the grid plate 14 to flip and placing the pre-treated hard gold jewelry onto the conveyor belt 19. After the hard gold jewelry is placed, the rotating motor 15 rotates in the opposite direction to reset the grid plate 14. The above operation is repeated to pre-treat the hard gold jewelry. According to the size of the hard gold jewelry, the rotating motor 21 rotates to move the slider 25 along the sliding groove 22, adjusting the distance between the two baffles 26 to prevent the hard gold jewelry from falling off the conveyor belt 19 during transportation. The drying hood 5 is evenly provided with multiple air outlets at one end near the conveyor belt 19, using room temperature to dry the surface moisture of the jewelry, avoiding high temperature damage to the hard gold material and preventing discoloration.

[0026] Example 3 The coating chamber 6 has two openings 28 circumferentially. Two mounting slots 30 are formed inside the coating chamber 6, and the mounting slots 30 are connected to the openings 28. An electric actuator 31 is fixedly connected to the mounting slot 30. A sealing plate 32 is fixedly connected to the output end of the electric actuator 31, and the sealing plate 32 is adapted to the opening 28. A slide rail 35 is fixedly connected inside the coating chamber 6. A first slide block 40 is slidably connected inside the slide rail 35. A first threaded rod 41 is rotatably connected inside the slide rail 35, and the first threaded rod 41 is threadedly connected to the first slide block 40. A second vertical rail 37 is rotatably connected to the upper surface of the first slide block 40. A second slide block 43 is slidably connected inside the second vertical rail 37. A second threaded rod 44 is rotatably connected inside the second vertical rail 37, and the second threaded rod 44 is threadedly connected to the second slide block 43.

[0027] The coating chamber 6 adopts a double-layer sealing structure. The inner layer is the coating cavity, and the outer layer is the heat insulation layer. The vacuum degree of the coating cavity is adjustable to ensure that there are no impurities interfering with the coating process and to avoid defects such as pores and inclusions in the coating. The double-layer sealing structure can effectively ensure the stability of the vacuum degree and at the same time play a role in heat insulation and reduce energy consumption. When the dried metal ornaments are moved to the vicinity of the opening 28, the electric push rod 31 in the mounting groove 30 pulls the sealing plate 32 to move upward along the mounting groove 30, so that the opening 28 is opened. At the same time, the second threaded rod 44 rotates to adjust the height of the second slide 43 according to the size of the hard gold ornaments. The rotation of the first threaded rod 41 drives the first slide 40 and the second vertical rail 37 to move synchronously.

[0028] Example 4 A connecting plate 45 is fixedly connected to the end of the second slide block 43 away from the second vertical rail 37. A clamping plate 39 is fixedly connected to the lower surface of the connecting plate 45. Multiple telescopic grooves 46 are evenly provided at the end of the clamping plate 39 away from the connecting plate 45. A telescopic block 47 is slidably connected in the telescopic groove 46. A clamping plate 48 is fixedly connected to the telescopic block 47. A cavity 49 is provided in the clamping plate 48. A rotating disk 50 is rotatably connected in the cavity 49. Multiple arc-shaped grooves 52 are evenly provided on the rotating disk 50. A pull column 51 is fixedly connected to the end of the telescopic block 47 near the rotating disk 50, and the pull column 51 is slidably connected to the arc-shaped groove 52.

[0029] While the second slide block 43 moves, the heights of the connecting plate 45 and the clamping plate 39 are adjusted synchronously. At the same time, the drive motor matched with the rotating disk 50 rotates to drive the telescopic block 47 to move along the telescopic groove 46, increasing the distance between the clamping plates 48. When the rotating disk 50 moves directly above the hard gold jewelry, the drive motor rotates in the opposite direction, driving the telescopic block 47 to move in the opposite direction along the telescopic groove 46, so that the clamping plate 48 comes into contact with the hard gold jewelry. The contact end between the clamping plate 48 and the hard gold jewelry is equipped with buffer rubber and a pressure sensor, so the clamping plate 48 will not cause damage to the jewelry.

[0030] Example 5 The composite coating assembly is used to improve coating uniformity. The composite coating assembly includes a gas storage tank 4, a coating chamber 6, a vacuum pump 27, and a fixed base 57. A rotating shaft 38 is rotatably connected inside the coating chamber 6, extending through the coating chamber 6 to the outside. One end of the rotating shaft 38 inside the coating chamber 6 is fixedly connected to the fixed base 57. A disc 58 is fixedly connected to the end of the fixed base 57 away from the rotating shaft 38. Multiple rotating grooves 59 are evenly distributed on the disc 58. A rotating plate 62 is rotatably connected within each rotating groove 59. The disc 58... Multiple rotating frames 63 are uniformly and fixedly connected. Grippers 60 are rotatably connected inside the rotating frames 63, and rotating plates 62 are rotatably connected to grippers 60. A hydraulic rod 42 is fixedly connected to the upper surface of the fixed base 57. A moving plate 61 is fixedly connected to the output end of the hydraulic rod 42, and rotating plates 62 are rotatably connected to moving plates 61. The hydraulic rod 42 extends to drive multiple grippers 60 to clamp hard gold jewelry. A vacuum tube 7 is fixedly connected to the input end of the vacuum pump 27. The vacuum pump 27 is connected to the coating chamber 6 through the vacuum tube 7.

[0031] The first threaded rod 41 rotates in the opposite direction, driving the first slide 40 and the second vertical rail 37 to move in the opposite direction. When the clamping plate 39 moves into the coating chamber 6, the electric push rod 31 in the mounting groove 30 pushes the sealing plate 32 to move upward along the mounting groove 30, closing the chamber opening 28. At the same time, the vacuum pump 27 evacuates the coating chamber 6. The second threaded rod 44 rotates to raise the height of the clamping plate 39. Simultaneously, the angle adjuster on the upper surface of the first slide 40 controls the second vertical rail 37 to rotate 180 degrees. When the height of the clamping plate 39 is higher than the gripper 60, the first threaded rod 41 pushes the clamping plate 39 to move directly above the disc 58, aligning the center line of the clamping plate 39 with the disc 58. When the center lines of the disc 58 coincide, the first threaded rod 41 stops moving, and the second threaded rod 44 rotates to lower the height of the clamping disc 39. At the same time, the hydraulic rod 42 extends, pushing multiple grippers 60 to unfold. When the clamping disc 39 moves to the predetermined height, the hydraulic rod 42 retracts, pulling multiple grippers 60 to clamp the hard gold jewelry. The contact ends of the grippers 60 with the hard gold jewelry are equipped with buffer rubber and pressure sensors to prevent damage to the hard gold jewelry. After the clamping disc 39 is released, the second threaded rod 44 rotates in the opposite direction to raise the height of the clamping disc 39. At the same time, the first threaded rod 41 rotates to move the second vertical rail 37 toward the opening 28 to avoid affecting subsequent coating.

[0032] Example 6 Two first vertical rails 36 are fixedly connected inside the coating chamber 6. A lifting seat 53 is slidably connected inside the first vertical rail 36. A third threaded rod 54 is rotatably connected inside the first vertical rail 36 and threadedly connected to the lifting seat 53. A reversing plate 55 is rotatably connected to one end of the lifting seat 53 near the disc 58. Target materials 56 are fixedly connected to both ends of the reversing plate 55. A fixing frame 33 is fixedly connected to the inner top wall of the coating chamber 6. A pulse bias ionizer 34 is fixedly connected to one end of the fixing frame 33 near the gripper 60. An air inlet pipe 29 is fixedly connected to the output end of the gas storage tank 4. The gas storage tank 4 and the coating chamber 6 are connected through the air inlet pipe 29.

[0033] After the hard gold jewelry is clamped, it is first pre-treated. The pulsed bias ionizer 34 is located directly above the hard gold jewelry, with its emission port facing the center of the jewelry. Two sets of targets 56 are symmetrically installed on both sides of the jewelry, with the center of the target 56 at the same height as the center of the jewelry. This arrangement ensures that the ion beam emitted by the pulsed bias ionizer 34 can fully cover the surface of the jewelry, while not blocking the sputtering path of the ions from the target 56. The ions sputtered by the target 56 can also be deposited onto the surface of the jewelry without interference. The pulsed bias ionizer 34 generates an ion beam to bombard the surface of the jewelry for ion pretreatment, removing residual trace impurities, activating the surface microstructure, and increasing the surface roughness, providing a better bonding basis for the subsequent ion deposition of the target 56. At this time, the target 56 is not sputtered.

[0034] Secondly, after ion pretreatment, the pulsed bias ionizer 34 operates at low power, and the third threaded rod 54 rotates to adjust the height of the lifting seat 53, such as... Figure 9 As shown, the target 56 located below the reversing plate 55 is the transition layer target, and the target 56 above it is the main wear-resistant target. This ensures that the sputtering surfaces of the transition layer targets all face the center of the jewelry. The drive motor of the rotating shaft 38 drives it to rotate, thereby causing the hard gold jewelry to rotate at a uniform speed, assisting in the ion deposition of the target 56. The vacuum pump 27 continuously removes excess gas generated in the coating chamber 6, stabilizing the vacuum level at 10⁻³-10⁻³. 5Within the process range of Pa, argon gas is continuously introduced into the coating chamber 6 from the gas storage tank 4 at a flow rate of 10-100 sccm. The intelligent control module of the device receives real-time feedback data from the vacuum sensor inside the coating chamber 6 to ensure that the vacuum level and the inert gas concentration are matched. The radio frequency power supply matched with the target 56 applies a high-frequency voltage to the target 56, ionizing the argon gas in the coating chamber 6 to provide a medium for ion sputtering and form a highly active argon plasma. Under the action of the high-frequency electric field, the argon plasma gains sufficient kinetic energy and impacts the transition layer target at high speed, stripping titanium or chromium atoms from the surface of the transition layer target to form highly active ions. Under the assistance of an electric field and argon gas, these ions are transported towards the hard gold jewelry and deposited to form a transition coating. At this time, the main wear-resistant target is located above the transition layer target and is not activated to avoid interfering with the deposition of the transition layer. After the transition layer is deposited, the sputtering of the transition layer stops. The reversing assembly matched with the reversing plate 55 moves the main wear-resistant target below the reversing plate 55 and drives the third threaded rod 54 to adjust the height of the lifting seat 53 so that the sputtering surface of the main wear-resistant target is facing the center of the jewelry. The above operation is repeated so that the DLC or rhodium-ruthenium alloy atoms of the main wear-resistant target are sputtered and deposited on the hard gold jewelry. During the sputtering process, the jewelry rotates evenly to improve the uniformity of the coating.

[0035] The working principle of this invention is as follows: Hard gold jewelry requiring coating is placed on a grid plate 14. A synchronous pulley 12 moves the grid plate 14 into a cleaning tank 16 and an activation tank 17. An ultrasonic generator in the cleaning tank 16 effectively removes stubborn oil and impurities from the jewelry surface. A micro-etching solution in the activation tank 17 slightly corrodes the surface of the hard gold jewelry, removing the surface oxide layer and simultaneously forming a tiny uneven structure on the surface. After pretreatment, the jewelry is conveyed to a conveyor belt 19 for drying. When the dried metal jewelry moves to near the hopper 2... At position 8, the electric actuator 31 in the mounting groove 30 pulls the sealing plate 32 upward along the mounting groove 30, opening the compartment 28. Simultaneously, the second threaded rod 44 rotates to adjust the height of the second slide block 43 according to the size of the hard gold jewelry. The first threaded rod 41 rotates, driving the first slide block 40 and the second vertical rail 37 to move synchronously. When the clamping plate 39 moves directly above the hard gold jewelry, the drive motor drives the telescopic block 47 to move in the opposite direction along the telescopic groove 46, causing the clamping plate 48 to abut against the hard gold jewelry. The first threaded rod 41 rotates in the opposite direction, driving the first slide block 40 and the second vertical rail 37 to move synchronously. 7. When the reverse movement brings the clamping plate 39 directly above the disc 58, the hydraulic rod 42 retracts, pulling multiple jaws 60 to clamp the hard gold jewelry. After the hard gold jewelry is clamped, the pulsed bias ionizer 34 generates an ion beam to bombard the surface of the jewelry for pretreatment, removing residual trace impurities, activating the surface microstructure, and increasing surface roughness. After the ion pretreatment, the pulsed bias ionizer 34 operates at low power, and the radio frequency power supply matched with the target 56 applies a high-frequency voltage to the target 56. Under the action of the high-frequency electric field, the argon plasma... With sufficient kinetic energy, the target impacts the transition layer at high speed, stripping titanium or chromium atoms from the target surface to form highly active ions. These ions, aided by an electric field and argon gas, are transported towards the hard gold jewelry and deposited to form a transition coating. The reversing assembly, which is matched with the reversing plate 55, moves the main wear-resistant target below the reversing plate 55 and drives the third threaded rod 54 to adjust the height of the lifting seat 53 so that the sputtering surface of the main wear-resistant target faces the center of the jewelry. The above operation is repeated so that the DLC or rhodium-ruthenium alloy atoms of the main wear-resistant target are sputtered and deposited onto the hard gold jewelry to form the main wear-resistant layer.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for treating the surface of hard gold jewelry with a wear-resistant coating, comprising a base plate (1), characterized in that: The base plate (1) is provided with a pretreatment component and a composite coating component. The pretreatment component is used to remove oil stains, oxide layer and impurities from the surface of hard gold jewelry. The composite coating component is used to deposit a transition coating and a main wear-resistant coating sequentially on the surface of the pretreated hard gold jewelry. The pretreatment component is used to improve the pretreatment efficiency. The pretreatment component includes an ultrasonic cleaning unit (2), a support frame (3), a drying hood (5), and a micro-etching activation unit (10). The ultrasonic cleaning unit (2) includes a cleaning tank (16), and the micro-etching activation unit (10) includes an activation tank (17). Two synchronous pulleys (12) are symmetrically installed on one end of the support frame (3) away from the bottom plate (1). A toothed belt (8) is sleeved on both of the synchronous pulleys (12). Multiple telescopic rods (9) are uniformly fixedly connected to the toothed belt (8) in the circumference. A support plate (13) is fixedly connected to the output end of the telescopic rod (9). A rotating motor (15) is fixedly connected to the support plate (13). A grid plate (14) is fixedly connected to the output end of the rotating motor (15). The cleaning tank (16) and the activation tank (17) are both adapted to the grid plate (14). The composite coating assembly is used to improve coating uniformity. The composite coating assembly includes a gas storage tank (4), a coating chamber (6), a vacuum pump (27), and a fixed base (57). A disk (58) is fixedly connected to one end of the fixed base (57) away from the rotating shaft (38). A plurality of rotating grooves (59) are evenly opened on the disk (58). A rotating plate (62) is rotatably connected in the rotating grooves (59). A plurality of rotating frames (63) are evenly fixedly connected around the disk (58). A gripper (60) is rotatably connected in the rotating frame (63), and the rotating plate (62) is rotatably connected to the gripper (60). The fixed base (57) is used to improve coating uniformity. A hydraulic rod (42) is fixedly connected to the upper surface of the seat (57). A movable plate (61) is fixedly connected to the output end of the hydraulic rod (42), and the rotating plate (62) is rotatably connected to the movable plate (61). The hydraulic rod (42) extends to drive multiple jaws (60) to clamp the hard gold jewelry. A fixed frame (33) is fixedly connected to the inner top wall of the coating chamber (6). A pulse bias ionizer (34) is fixedly connected to one end of the fixed frame (33) near the jaws (60). An air inlet pipe (29) is fixedly connected to the output end of the gas storage tank (4). The gas storage tank (4) and the coating chamber (6) are connected through the air inlet pipe (29).

2. The hard gold jewelry surface wear-resistant coating treatment device according to claim 1, characterized in that: The coating chamber (6) is fixedly connected to two first vertical rails (36). A lifting seat (53) is slidably connected in the first vertical rail (36). A third threaded rod (54) is rotatably connected in the first vertical rail (36), and the third threaded rod (54) is threadedly connected to the lifting seat (53). A reversing plate (55) is rotatably connected to one end of the lifting seat (53) near the disc (58). Target material (56) is fixedly connected to both ends of the reversing plate (55). A vacuum tube (7) is fixedly connected to the input end of the vacuum pump (27). The vacuum pump (27) and the coating chamber (6) are connected through the vacuum tube (7).

3. The hard gold jewelry surface wear-resistant coating treatment device according to claim 1, characterized in that: Two side plates (11) are fixedly connected to the upper surface of the base plate (1), and two rollers (18) are rotatably connected between the two side plates (11). A conveyor belt (19) is fitted on both rollers (18), and the drying hood (5) is fixedly connected to the side plates (11).

4. The hard gold jewelry surface wear-resistant coating treatment device according to claim 3, characterized in that: An adjusting plate (20) is fixedly connected to one end of the drying hood (5) near the conveyor belt (19). A rotary motor (21) is fixedly connected to the adjusting plate (20). Two sliding grooves (22) are symmetrically opened at one end of the adjusting plate (20) near the conveyor belt (19). A slider (25) is slidably connected in the sliding groove (22). A baffle (26) is fixedly connected to the slider (25).

5. The hard gold jewelry surface wear-resistant coating treatment device according to claim 4, characterized in that: The output end of the rotary motor (21) is fixedly connected to a rotating plate (23), and the two ends of the rotating plate (23) are rotatably connected to hinge plates (24), and the hinge plates (24) are rotatably connected to the slider (25).

6. The hard gold jewelry surface wear-resistant coating treatment device according to claim 1, characterized in that: The coating chamber (6) has two openings (28) in the circumference. The coating chamber (6) has two mounting slots (30) in the interior, and the mounting slots (30) are connected to the openings (28). An electric push rod (31) is fixedly connected in the mounting slot (30). A sealing plate (32) is fixedly connected to the output end of the electric push rod (31), and the sealing plate (32) is adapted to the opening (28).

7. The apparatus for treating the surface wear-resistant coating of hard gold jewelry according to claim 1, characterized in that: The coating chamber (6) is fixedly connected to a slide rail (35), a first slide block (40) is slidably connected to the slide rail (35), a first threaded rod (41) is rotatably connected to the slide rail (35), and the first threaded rod (41) is threadedly connected to the first slide block (40). A second vertical rail (37) is rotatably connected to the upper surface of the first slide block (40), a second slide block (43) is slidably connected to the second vertical rail (37), a second threaded rod (44) is rotatably connected to the second vertical rail (37), and the second threaded rod (44) is threadedly connected to the second slide block (43).

8. The hard gold jewelry surface wear-resistant coating treatment device according to claim 7, characterized in that: A rotating shaft (38) is rotatably connected inside the coating chamber (6), and the rotating shaft (38) extends through the coating chamber (6) to the outside. One end of the rotating shaft (38) inside the coating chamber (6) is fixedly connected to the fixed seat (57). A connecting plate (45) is fixedly connected to the end of the second slide (43) away from the second vertical rail (37). A clamping plate (39) is fixedly connected to the lower surface of the connecting plate (45). A plurality of telescopic grooves (46) are evenly opened at the end of the clamping plate (39) away from the connecting plate (45). A telescopic block (47) is slidably connected inside the telescopic groove (46). A clamping plate (48) is fixedly connected to the telescopic block (47).

9. The hard gold jewelry surface wear-resistant coating treatment device according to claim 8, characterized in that: The clamping plate (48) has a cavity (49) inside, and a rotating disk (50) is rotatably connected inside the cavity (49). Multiple arc-shaped grooves (52) are evenly provided on the rotating disk (50). A pull column (51) is fixedly connected to one end of the telescopic block (47) near the rotating disk (50), and the pull column (51) is slidably connected to the arc-shaped groove (52).

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