Surface treatment device

Abstract

The invention relates to the technical field of surface treatment, and discloses a surface treatment device. The device comprises a rack and a clamping assembly arranged on a top platform of the rack and used for clamping and fixing a workpiece, and a surface treatment assembly used for treating the surface of the workpiece is further movably arranged on the top platform of the rack; the surface treatment assembly comprises a treatment mechanism adopting a closed reaction cavity design, a storage tank used for storing a treatment agent and communicating with the treatment mechanism, and a first pump body connected with the treatment mechanism and the storage tank, so that the treatment agent is circulated in a closed environment. The treatment mechanism, the storage tank and the first pump body form a complete closed treatment system, and the specially designed duckbill valve is adopted, so that the complete isolation of the treatment environment is realized, the phenomena of oxidation, failure and degradation caused by contact of a treatment agent and air are effectively inhibited, and the utilization rate of the treatment agent is improved.

Description

Technical Field

[0001] This invention relates to the field of surface treatment technology, and more particularly to a surface treatment apparatus. Background Technology

[0002] In the field of precision machining for medical devices, the demand for surface treatment of polymer materials (polyimide, polytetrafluoroethylene, polyetheretherketone, etc.) and metal substrates (nickel-titanium wire, titanium alloy, stainless steel, etc.) is increasingly prominent. Among these, surface modification treatments of fluorinated polymers and medical metal materials require specialized chemical reagent systems with high volatility and reactivity. Common examples include fluorinated acid etching solutions, chromic acid treatment solutions, and treatment solutions containing volatile organic solvents. Taking fluorinated material surface treatment agents containing naphthalene-sodium complexes as an example, this reagent system is extremely sensitive to moisture and must be operated under conditions strictly isolated from water vapor (including ambient humidity).

[0003] Medical device components (workpieces) typically exhibit rod-shaped or sheet-like geometries (such as orthopedic implant rods, surgical instrument sheets, interventional catheter tubing, etc.), and traditional surface treatment processes have significant drawbacks: Firstly, the geometric characteristics of the materials to be processed and the requirement for a sealed environment for chemical reagents result in low utilization rates of chemical reagents. Secondly, the uniformity of surface treatment is difficult to guarantee, and the performance fluctuates significantly between batches.

[0004] To overcome the aforementioned technical bottlenecks, this study designed and developed a novel surface treatment device. Summary of the Invention

[0005] To address the aforementioned technical problems, the present invention provides a surface treatment apparatus for surface treatment of medical devices.

[0006] The present invention is achieved by the following technical solution: a frame and a clamping assembly disposed on the top platform of the frame for clamping and fixing the workpiece; a surface treatment assembly for treating the surface of the workpiece is also movably disposed on the top platform of the frame. The surface treatment assembly includes a treatment mechanism with a closed reaction chamber design, a storage tank for storing the treatment agent and communicating with the treatment mechanism, and a first pump connected to both, thereby enabling the treatment agent to circulate in a closed environment. The processing mechanism has a tubular flow channel inside, which allows the processing agent to flow through the tubular flow channel after entering the processing mechanism. When the workpiece passes through the processing mechanism and the tubular flow channel, the processing agent can be fully contacted. Both ends of the processing mechanism are equipped with a first duckbill valve, which ensures the internal airtightness of the processing mechanism when moving to process the workpiece.

[0007] As a further improvement to the above solution, a rinsing assembly consisting of a rinsing tank and a second pump is fixedly installed on one side of the surface treatment assembly. Both sides of the rinsing tank are provided with process openings for the workpiece to pass through, so as to clean the residual treatment agent on the surface of the workpiece after the chemical treatment is completed.

[0008] As a further improvement to the above solution, a second duckbill valve is installed on the process opening on the side of the rinsing tank away from the surface treatment components to prevent cleaning fluid leakage.

[0009] As a further improvement to the above solution, the rinsing tank is also equipped with a diversion mechanism connected to the cleaning fluid inlet. The diversion mechanism is equipped with a rinsing tank and a cleaning perforation that passes through the rinsing tank and allows the workpiece to pass through, so as to clean the workpiece surface more evenly and comprehensively.

[0010] As a further improvement to the above solution, a track motion component is provided on the top platform of the frame. The track motion component consists of a linear guide rail and a servo-driven moving block that is movably set on the linear guide rail. The surface treatment component is slidably set on the linear guide rail and fixedly connected to the servo-driven moving block, thereby driving the surface treatment component to perform uniform treatment on the workpiece surface according to a preset trajectory.

[0011] As a further improvement to the above solution, the clamping assembly includes a fixed clamping assembly and a movable clamping assembly. The two work together to not only clamp and fix the workpiece, but also to control the tension of the workpiece.

[0012] As a further improvement to the above solution, the fixed clamping assembly includes a first clamp, and a first cylinder for driving the first clamp is fixedly disposed on the top of the first clamp. The movable clamping assembly includes a slide cylinder, and a second clamp is fixedly mounted on the slide of the slide cylinder. A second cylinder for driving the second clamp is disposed on the second clamp.

[0013] As a further improvement to the above solution, both the first and second fixtures are equipped with hard limit blocks with toothed structures, which can securely lock the workpiece and effectively prevent the workpiece from shifting during the processing.

[0014] As a further improvement to the above solution, the frame is equipped with a lifting and supporting assembly consisting of a servo electric cylinder and a scratch-resistant pad to provide vertical support for the workpiece.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The surface treatment component adopts a modular sealing system design, consisting of a treatment mechanism, a storage tank, and a first pump body, forming a complete closed treatment system. It uses a specially designed duckbill valve to achieve complete isolation of the treatment environment. This design effectively inhibits oxidation, failure, and degradation caused by contact between the treatment agent and air, and significantly improves the chemical stability and service life of the treatment agent. This device adopts a dynamic circulation processing mechanism. Through optimized reflux structure and multi-stage flow channel design, it achieves continuous and uniform flow of the treatment agent. A tubular flow channel with an intermediate inlet end connected to the liquid inlet of the treatment mechanism is set inside the treatment mechanism, allowing the workpiece to fully and uniformly contact the treatment agent. When the circulation system is combined with the track motion component, the reaction time of the treatment liquid can be precisely maintained, ensuring the consistency and reproducibility of the treatment effect. By installing a rinsing component on the surface treatment assembly and setting a flow-guiding mechanism within the rinsing component, not only can the rinsing fluid flow rate be precisely controlled, but the rinsing fluid can also make more comprehensive and uniform contact with the workpiece. This ensures the cleaning effect while avoiding mechanical damage to the treated workpiece. This design not only ensures product quality but also eliminates the biocompatibility risks caused by residual treatment fluid. Attached Figure Description

[0016] Figure 1 This is an overall view of the surface treatment apparatus of the present invention; Figure 2 This is a diagram showing the core components of the surface treatment apparatus of the present invention; Figure 3 This is a schematic diagram of the surface treatment components of the surface treatment apparatus of the present invention; Figure 4 This diagram illustrates the processing mechanism and storage tank within the surface treatment assembly. Figure 5 A plan view showing the processing unit and storage tanks; Figure 6 This is a diagram illustrating the storage tank. Figure 7 This is a schematic diagram of the spray rinsing component of the surface treatment apparatus of the present invention; Figure 8 The images show side and front sectional views of the spray rinsing assembly. Figure 9 This is a demonstration diagram of the workpiece penetration treatment mechanism and the spray rinsing assembly; Figure 10 This is a diagram illustrating the fixing and clamping components of the surface treatment apparatus of the present invention; Figure 11 This is a diagram illustrating the movable clamping component of the surface treatment apparatus of the present invention; Figure 12 This is a diagram illustrating the lifting and supporting component of the surface treatment device of the present invention.

[0017] Explanation of key symbols: 1. Frame; 2. Track motion assembly; 3. Fixed clamping assembly; 301. First clamp; 302. First cylinder; 4. Movable clamping assembly; 401. Slide cylinder; 402. Second clamp; 403. Second cylinder; 5. Lifting and supporting assembly; 501. Servo electric cylinder; 502. Anti-scratch pad; 6. Surface treatment assembly; 601. Treatment mechanism; 6011. Liquid inlet; 6012. Tubular flow channel; 6013. 6014, First duckbill valve; 602, Storage tank; 6021, Liquid outlet port; 6022, Upper interface; 603, First pump body; 7, Flushing assembly; 701, Flushing tank; 7011, Cleaning fluid outlet; 7012, Cleaning fluid inlet; 7013, Drainage mechanism; 70131, Flushing tank; 70132, Cleaning perforation; 7014, Second duckbill valve; 702, Second pump body; 8, Hard limit block. Detailed Implementation

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0019] Please combine Figures 1 to 12 The surface treatment device includes: a frame 1, which serves as the basic support structure of the entire device and is made of high-strength steel welded together to ensure the stability of the equipment operation; a clamping assembly for clamping and fixing the workpiece is provided on the top platform of the frame 1; and a surface treatment assembly 6 for treating the surface of the workpiece is also movably provided on the top platform of the frame 1. The surface treatment assembly 6 is an integrated device system specifically for chemical treatment of the surface of rod-shaped materials. The surface treatment component 6 includes a treatment mechanism 601 with a closed reaction chamber design, a storage tank 602 for storing the treatment agent and communicating with the treatment mechanism 601, and a first pump body 603 connected to both. The top and side of the storage tank 602 are respectively provided with an upper interface 6022 and a liquid outlet port 6021. The first pump body 603 can provide circulation power for the treatment agent, so that the treatment agent can complete circulation in a closed environment. The processing mechanism 601 has an inlet 6011 at its top and an outlet 6013 at its bottom. Inside the processing mechanism 601, there is a tubular flow channel 6012 connected to the inlet 6011 at its middle inlet end. This allows the processing agent to flow through the tubular flow channel 6012 after entering the processing mechanism 601. When a workpiece penetrates the processing mechanism 601 and the tubular flow channel 6012, the processing agent can fully contact the workpiece. Furthermore, both ends of the tubular flow channel 6012 have a gradually expanding flared structure to facilitate workpiece insertion. To achieve continuous entry and exit of the workpiece, the processing machine... The processing mechanism 601 has process openings at both ends of its horizontal axis and is equipped with first duckbill valves 6014. One port of the two first duckbill valves 6014 faces outward and the other port faces inward, so that the processing mechanism 601 can ensure internal airtightness when moving and processing workpieces. The valve design has a dual function: it can ensure the integrity of the workpiece surface during the transfer process and effectively inhibit the infiltration of external gas. The bottom of the processing mechanism 601 integrates a self-reflux structure. After the processing agent is discharged through the end of the tubular flow channel 6012, it is collected in the liquid collection area at the bottom of the processing mechanism 601 under the action of gravity, and then flows back to the storage tank 602. Storage tank 602 is mainly used for the storage and circulation of treatment agents. Its structure adopts a closed liquid container design. In terms of geometric configuration, a variety of standardized three-dimensional container shapes can be selected, including but not limited to typical structures such as cylinder, cuboid and cube. The top of storage tank 602 is equipped with an upper interface 6022, which is connected to the liquid outlet 6013 of treatment mechanism 601 through flange connection or quick connector to achieve a sealed connection, ensuring the leakage-free transportation of treatment agents. The side wall of storage tank 602 is provided with a liquid outlet port 6021 at a height of 5-20cm from the end of the tank. This height setting ensures the effective discharge of treatment agent liquid and avoids the mixing of sediment at the bottom of storage tank 602. The liquid outlet port 6021 is connected to the inlet of the first pump body 603 through a corrosion-resistant conveying pipe. The outlet of the first pump body 603 is connected to the liquid inlet 6011 on treatment mechanism 601 through a corrosion-resistant conveying pipe, forming a complete fluid transportation system. The first pump body 603 (including a magnetically driven pump, a self-priming pump, and a peristaltic pump, etc.) delivers the treatment agent in the storage tank 602 to the treatment mechanism 601 through a conveying system (working pressure 0.1-0.3MPa). The conveying system (conveying pipeline) is equipped with a high-precision flow sensor (accuracy ±1%FS) and a PID control module to ensure the stability of the treatment process. In addition, the surface treatment component 6 is provided with air inlet valve interfaces on the treatment mechanism 601 and the storage tank 602 respectively, which can inject inert gas into both. By injecting inert gas (a gaseous medium that is chemically inert to the treatment agent), a positive pressure environment can be established inside the system. When the workpiece enters the treatment area (inside the treatment mechanism 601) through the first duckbill valve 6014, the high-pressure inert gas inside forms a directional exhaust flow, thereby constructing an airtight barrier to ensure the stability of the chemical activity of the treatment agent.

[0020] Please combine Figures 7 to 9 A rinsing assembly 7, consisting of a rinsing tank 701 and a second pump 702, is fixedly installed on one side of the surface treatment assembly 6. The rinsing tank 701 has a cleaning fluid outlet 7011 and a cleaning fluid inlet 7012 on one side, both connected to the inlet and outlet of the second pump 702 via connecting pipes. This allows for the cleaning of residual treatment agents on the workpiece surface after chemical treatment. The rinsing tank 701 is made of 316L stainless steel. Process openings for workpieces to pass through are provided on both sides of the rinsing tank 701. A second duckbill valve 7014 is installed on the process opening of the rinsing tank 701 away from the surface treatment assembly 6 to prevent cleaning fluid leakage. The second pump 702 uses a closed-loop control system to precisely regulate the rinsing solution flow rate, achieving a flow control accuracy of ±2%. The rinsing tank 701 is also equipped with a diversion mechanism 7013 connected to the cleaning fluid inlet 7012. The diversion mechanism 7013 is equipped with a rinsing tank 70131 and a cleaning perforation 70132 that passes through the rinsing tank 70131 and allows the workpiece to pass through. The rinsing tank 70131 is connected to the cleaning fluid inlet 7012 on the rinsing tank 701. When the workpiece passes through the diversion mechanism 7013, the flowing cleaning fluid can clean the surface of the workpiece more evenly and comprehensively. When the workpiece passes through the second duckbill valve 7014 in the horizontal direction, the second pump 702 delivers the cleaning fluid to the rinsing tank 70131 at a constant flow rate (0.5-2.0L / min) to complete the dynamic cleaning process. The waste liquid returns to the bottom of the rinsing tank 701 to realize the recycling of the solution.

[0021] Please combine Figures 1 to 2 A track motion component 2 is fixedly installed on the top platform of the frame 1. The track motion component 2 consists of a linear guide rail and a servo-driven moving block that is movably installed on the linear guide rail. The surface treatment component 6 is slidably installed on the linear guide rail and fixedly connected to the servo-driven moving block, thereby driving the surface treatment component 6 to perform uniform treatment on the surface of the workpiece according to a preset trajectory.

[0022] Please combine Figure 1 , Figure 2 , Figure 10 as well as Figure 11The clamping assembly includes a fixed clamping assembly 3 and a movable clamping assembly 4. The two work together to not only clamp and fix the workpiece, but also to control the tension of the workpiece. The fixed clamping assembly 3 is fixedly installed on the top platform of the frame 1. It includes a first clamp 301, and a first cylinder 302 for driving the first clamp 301 is fixedly provided on the top of the first clamp 301. The movable clamping assembly 4 is bolted to the top platform of the frame 1. It includes a slide cylinder 401, on which a second clamp 402 is fixedly mounted. A second cylinder 403 is mounted on the second clamp 402 to drive it. During operation, the slide cylinder 401 of the movable clamping assembly 4 reciprocates linearly along the horizontal guide rail, achieving the tensioning or loosening of the product. The slide cylinder 401 employs a precision guiding structure to ensure smooth and reliable movement, thereby enabling precise control of the product's tension. Both the first fixture 301 and the second fixture 402 are equipped with toothed hard limit blocks 8, which can securely lock the workpiece and effectively prevent the workpiece from shifting during the processing.

[0023] Please combine Figure 1 , Figure 2 as well as Figure 12 The frame 1 is equipped with a lifting and supporting assembly 5 consisting of a servo electric cylinder 501 and an anti-scratch pad 502, which provides vertical support for the workpiece and effectively avoids the risk of deflection deformation caused by the workpiece's own weight. In addition, the anti-scratch pad 502 is made of a special composite material (composite materials include but are not limited to PTFE, PEEK, PP, and PE), which forms a buffer protective layer on the contact surface with the workpiece to ensure that the surface of the workpiece is not subjected to mechanical damage during the support process.

[0024] The implementation principle of a surface treatment device in this application embodiment is as follows: The workpiece (medical device component, such as a titanium alloy rod) passes through the surface treatment component 6 and the rinsing component 7 (through the treatment mechanism 601, the tubular flow channel 6012, the rinsing box 701, and the drainage mechanism 7013); and both ends are fixed to the fixed clamping component 3 and the movable clamping component 4 respectively. The tension is adjusted by the slide cylinder 401, and the lifting and supporting component 5 is raised to support the middle of the workpiece. The track motion component 2 drives the surface treatment component 6 and the rinsing component 7 to move. The first pump body 603 pumps the treatment agent in the storage tank 602 into the treatment mechanism 601. The treatment agent contacts the component surface through the tubular flow channel structure 6012, and after completing the etching treatment, it flows back to the storage tank 602. After the process is completed, as the rinsing assembly 7 moves, the workpiece processing area enters the rinsing assembly 7. The second pump body 702 pumps the cleaning fluid into the rinsing tank 70131 in the diversion mechanism 7013 to rinse the surface of the assembly. Then the cleaning waste liquid flows back into the rinsing tank 701. After rinsing is completed, the clamping assembly is released and the processed workpiece is removed.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: The surface treatment component 6 adopts a modular sealing system design, consisting of a treatment mechanism 601, a storage tank 602, and a first pump body 603, forming a complete closed treatment system. It uses a specially designed duckbill valve to achieve complete isolation of the treatment environment. This design effectively inhibits oxidation, failure, and degradation caused by the treatment agent coming into contact with air, and significantly improves the chemical stability and service life of the treatment agent. This device adopts a dynamic circulation processing mechanism. Through the optimized reflux structure and multi-stage flow channel design, it achieves continuous and uniform flow of the treatment agent. A tubular flow channel 6012 is set inside the processing mechanism 601, which is connected to the liquid inlet 6011 of the processing mechanism 601. This allows the workpiece to come into full and uniform contact with the treatment agent. When the circulation system is combined with the track motion component 2, the reaction time of the treatment liquid can be precisely maintained to ensure the consistency and reproducibility of the treatment effect. By installing a rinsing component 7 on the surface treatment component 6 and setting a flow guiding mechanism 7013 inside the rinsing component 7, not only can the flow rate of the rinsing liquid be precisely controlled, but the rinsing liquid can also make more comprehensive and uniform contact with the workpiece. This design not only ensures the cleaning effect but also avoids mechanical damage to the workpiece. This design not only ensures the quality of the product but also eliminates the biocompatibility risks caused by residual treatment liquid.

[0026] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A surface treatment apparatus, characterized in that, include: The frame (1) and the clamping assembly disposed on the top platform of the frame (1) for clamping and fixing the workpiece, and the top platform of the frame (1) is also movably disposed with a surface treatment assembly (6) for treating the surface of the workpiece. The surface treatment assembly (6) includes a treatment mechanism (601) with a closed reaction chamber design, a storage tank (602) for storing the treatment agent and communicating with the treatment mechanism (601), and a first pump (603) connected to both, so that the treatment agent can be circulated in a closed environment. The processing mechanism (601) is provided with a tubular flow channel (6012) inside, so that the processing agent enters the processing mechanism (601) and flows through the tubular flow channel (6012). When the workpiece passes through the processing mechanism (601) and the tubular flow channel (6012), the processing agent can fully contact the workpiece. The processing mechanism (601) is provided with a first duckbill valve (6014) at both ends of the axial direction, so as to ensure the internal airtightness of the processing mechanism (601) when moving to process the workpiece.

2. The surface treatment apparatus as described in claim 1, characterized in that, A rinsing assembly (7) consisting of a rinsing tank (701) and a second pump (702) is fixedly installed on one side of the surface treatment assembly (6). Both sides of the rinsing tank (701) are provided with process openings for the workpiece to pass through, so as to clean the residual treatment agent on the surface of the workpiece after the chemical treatment is completed.

3. The surface treatment apparatus as described in claim 2, characterized in that, A second duckbill valve (7014) is installed on the process opening on the side of the rinsing chamber (701) away from the surface treatment component (6) to prevent cleaning fluid leakage.

4. The surface treatment apparatus as described in claim 2, characterized in that, The rinsing tank (701) is also provided with a diversion mechanism (7013) connected to the cleaning fluid inlet (7012). The diversion mechanism (7013) is provided with a rinsing tank (70131) and a cleaning perforation (70132) that passes through the rinsing tank (70131) and allows the workpiece to pass through, so as to clean the workpiece surface more evenly and comprehensively.

5. The surface treatment apparatus as described in claim 1, characterized in that, The top platform of the frame (1) is provided with a track motion component (2), which consists of a linear guide rail and a servo drive moving block that is movably set on the linear guide rail. The surface treatment component (6) is slidably set on the linear guide rail and fixedly connected to the servo drive moving block, thereby driving the surface treatment component (6) to uniformly treat the workpiece surface according to a preset trajectory.

6. The surface treatment apparatus as claimed in claim 1, characterized in that, The clamping assembly includes a fixed clamping assembly (3) and a movable clamping assembly (4), which work together to clamp and fix the workpiece and control the tension of the workpiece.

7. The surface treatment apparatus as described in claim 6, characterized in that, The fixed clamping assembly (3) includes a first clamp (301), and a first cylinder (302) for driving the first clamp (301) is fixedly provided on the top of the first clamp (301). The movable clamping assembly (4) includes a slide cylinder (401), and a second clamp (402) is fixedly installed on the slide of the slide cylinder (401). A second cylinder (403) for driving the second clamp (402) is provided on the second clamp (402).

8. The surface treatment apparatus as described in claim 7, characterized in that, Both the first fixture (301) and the second fixture (402) are provided with hard limit blocks (8) with toothed structures, which can securely lock the workpiece and effectively prevent the workpiece from shifting during the processing.

9. The surface treatment apparatus as claimed in claim 1, characterized in that, The frame (1) is equipped with a lifting and supporting assembly (5) consisting of a servo electric cylinder (501) and a scratch-resistant pad (502) to provide vertical support for the workpiece.

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