Surface treatment device and method applied to connecting surface of metal / polymer valve assembly

Abstract

The invention relates to a surface treatment device and method applied to a metal / polymer valve assembly connecting surface, the device comprises an anode metal electrode plate, a cathode electrode, a liquid storage container, a lifting mechanism, surface treatment equipment and an interlayer structure, and the anode metal electrode plate and the cathode electrode are both connected with the surface treatment equipment; the anode metal electrode plate comprises a valve connecting part connected with the metal valve and a lifting connecting part capable of being connected with a lifting mechanism; electrolyte is contained in the liquid storage container, the metal valve and the cathode electrode are placed in the liquid storage container, the non-connecting surface of the metal valve is wrapped with an interlayer structure, the metal valve is connected with the anode metal electrode plate through the valve connecting part, and the anode metal electrode plate is connected with the lifting mechanism through the lifting connecting part. Compared with the prior art, the method has the advantages of being high in surface treatment process controllability, uniform in surface treatment and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of electrochemical surface treatment, and particularly to a device and method for surface treatment applied to the connection surface of a metal / polymer valve assembly. Background Art

[0002] The surface treatment of metals is a process method that uses physical, chemical and other means to physically or chemically modify the metal surface.

[0003] Currently, for the surface treatment of metal valve structures used for connection with polymers, the commonly used process method is sandblasting. However, the equipment and process required for sandblasting are relatively complex, the treatment cost is high, and there are many surface residues after treatment, which is not conducive to the connection between the treated metal surface and the polymer. Invention Patent CN202311103099.3 discloses a sandblasting treatment device for metal parts. The device has a complex structure and cannot achieve uniform surface treatment of complex structures in all directions. Utility Model Patent CN202223431293.8 discloses a sandblasting treatment mechanism for metal castings, which can simultaneously perform sandblasting treatment and cleaning of metal parts, but cannot achieve the treatment of specified surfaces of complex metal structures such as valve structures.

[0004] Anodization refers to immersing a metal part to be surface-treated as the anode in an electrochemical treatment together with a chemically inert cathode in an electrolyte solution, and conducting an electric circuit through the electrolyte solution to form an oxide film on the metal surface of the anode in an electrolytic manner. The oxide film has chemical activity and a certain rough structure, and at the same time has unique physical and chemical properties, which can meet various usage requirements.

[0005] In the existing technologies for anodization treatment of metal surfaces, the overall immersion method is mostly adopted, and there are deficiencies in the protection of non-oxidized surfaces and the isolation between them and the electrolyte solution. Invention Patent CN202310518169.5 discloses an anodization device, which can improve the efficiency of surface treatment of metal products with simple structures to a certain extent, saving time and effort. However, it is difficult to be applicable to complex structures, and at the same time, all surfaces of the metal parts in contact with the electrolyte solution during the oxidation process will participate in the electrochemical reaction, resulting in waste of resources. Utility Model Patent CN202223046926.3 discloses an anodization device, which has a complex structure and a cumbersome process.

[0006] In addition, the above-mentioned and currently commonly used metal anodization methods are difficult to achieve precise oxidation control for specified surfaces of complex structures such as valve structures. At the same time, due to reasons such as the shape of metal parts, the spatial distribution of current in the metal parts during the oxidation process is uneven, which will lead to inconsistent oxidation degrees of the surfaces to be oxidized. Summary of the Invention

[0007] The object of the present invention is to provide a device and method for surface treatment applied to the connection surface of a metal / polymer valve assembly, so as to improve the uniformity and effectiveness of the specified surface treatment of the metal valve.

[0008] The object of the present invention can be achieved by the following technical solutions: A device for surface treatment applied to the connection surface of a metal / polymer valve assembly, including an anode metal electrode plate, a cathode electrode, a liquid storage container, a lifting mechanism, a surface treatment device, and a partition structure. The anode metal electrode plate and the cathode electrode are both connected to the surface treatment device;

[0009] The anode metal electrode plate includes a valve connection part connected to the metal valve and a lifting connection part capable of being connected to the lifting mechanism;

[0010] The liquid storage container is filled with electrolyte. The metal valve and the cathode electrode are placed in the liquid storage container. A partition structure is wrapped on the non-connection surface of the metal valve. The metal valve is connected to the anode metal electrode plate through the valve connection part, and the anode metal electrode plate is connected to the lifting mechanism through the lifting connection part.

[0011] Preferably, the top of the metal valve is threadedly connected to the valve connection part, and the current is conducted to the metal valve through the anode metal electrode plate.

[0012] Preferably, the metal valve is of a rotary body structure, with an external thread or an internal thread for threaded connection with the valve connection part provided at the top, and the valve connection part is provided with an internal thread or an external thread corresponding to the thread at the top of the metal valve.

[0013] Further preferably, the thread is a triangular thread.

[0014] Preferably, the lifting connection part is in a sheet structure with a thickness of 0.5 mm to 5 mm, and through holes for connection with the lifting mechanism are provided thereon.

[0015] Further preferably, one or more through holes are provided on the lifting connection part.

[0016] Further preferably, the size of the through hole is φ2 to φ8.

[0017] Further preferably, a reserved position is provided above the through hole on the lifting connection part for connecting a wire.

[0018] Preferably, the lifting connection part is connected to the surface treatment device through an anode wire.

[0019] Preferably, the length range of the lifting connection part is 1 cm to 5 cm.

[0020] Preferably, the length of the valve connection part is 30 to 35% of the total length of the anode metal electrode plate.

[0021] Further preferably, the length of the valve connection part is 1 / 3 of the total length of the anode metal electrode sheet.

[0022] Preferably, the length range of the valve connection part is 0.5 cm to 5 cm, and the diameter is between 0.5 mm and 3 cm.

[0023] Preferably, the device for surface treatment applied to the connection surface of the metal / polymer valve assembly further includes a workbench, and a liquid storage container and a lifting mechanism are arranged on the workbench.

[0024] Further preferably, the lifting mechanism includes a vertical rod vertically arranged on the workbench and a horizontal rod arranged on the vertical rod. The horizontal rod is horizontally arranged above the liquid storage container, and the anode metal electrode sheet is connected to the horizontal rod through a lifting connection part.

[0025] Even more preferably, a plurality of mounting holes corresponding to the through holes of the lifting connection part are arranged at intervals along the horizontal direction on the horizontal rod.

[0026] Even more preferably, the height of the horizontal rod is 8 cm to 50 cm.

[0027] Even more preferably, the horizontal rod is slidably arranged on the vertical rod.

[0028] Preferably, the horizontal rod is slidably arranged on the vertical rod through an electric drive assembly, and the regulation speed range is between 0.5 mm / h and 10 mm / h.

[0029] Preferably, the surface treatment equipment has a constant current mode and a constant voltage mode.

[0030] Further preferably, the surface treatment equipment adopts the constant current mode during the surface treatment process.

[0031] Preferably, during the surface treatment process, the voltage selection range of the surface treatment equipment is 1 V to 50 V, the current selection range is 0.1 A to 10 A, and the surface treatment time is between 10 min and 180 min.

[0032] Preferably, the cathode electrode material includes a platinum sheet and a graphite rod.

[0033] Preferably, the cathode electrode area is 1 cm 2 ~50 cm 2 .

[0034] Preferably, the material of the anode metal electrode sheet is the same as that of the metal valve.

[0035] Preferably, the electrolyte includes a sulfuric acid solution and a phosphoric acid solution.

[0036] Further preferably, the volume fraction range of the electrolyte is 5% - 30%, and the mass fraction range of the electrolyte is preferably 5 g / L - 100 g / L.

[0037] Preferably, after the electrolyte is prepared, it needs to be fully cooled before the surface treatment process can be carried out.

[0038] Preferably, the interlayer structure includes acid- and corrosion-resistant adhesive tape.

[0039] A surface treatment method applied to the connection surface of a metal / polymer valve assembly, which is carried out using the above device, includes the following steps:

[0040] S1: Wrap the non-connection surface of the metal valve with an interlayer structure;

[0041] S2: Connect the metal valve to the valve connection part, and connect the metal valve to the lifting mechanism through the lifting connection part;

[0042] S3: Use the anode wire to connect the metal valve to the anode of the surface treatment device through the anode metal electrode plate;

[0043] S4: Immerse the cathode electrode and the metal valve in the electrolyte in the liquid storage container. The cathode electrode is connected to the cathode of the surface treatment device through the cathode wire, and use the surface treatment device to carry out the surface treatment of the metal valve.

[0044] Preferably, during the surface treatment process, the temperature of the electrolyte is controlled, and the surface treatment temperature is controlled at 0°C - 40°C.

[0045] Preferably, during the surface treatment process, the electrolyte is stirred.

[0046] Further preferably, magnetic stirring is used for the stirring.

[0047] The present invention relates to anodic oxidation electrochemical surface treatment of metals, in particular to a surface treatment method and device applied to the connection surface of a metal / polymer valve assembly. The anodic oxidation technology of metal parts is relatively mature, but there are still many problems to be solved as described in the background technology. The method and device of the present invention can achieve uniform surface treatment of the specified surface in a complex structure through oxidation process control and device structure design, and obtain a clean metal surface that is beneficial for connection with polymers.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] 1. The method and device for surface treatment of the present invention are simple, the controllability of the surface treatment process is strong, the surface treatment is uniform, the cleanliness of the treated surface is high, the control accuracy of the surface treatment is high, which is beneficial to the connection between metal and polymer, can significantly improve the quality of the connection between the surface of the metal surface treatment and the polymer, and is applicable to the surface treatment of specific surfaces of metals with complex structures such as valve structures.

[0050] 2. The device of the present invention is flexible, simple and has a wide application range. Through the specifically designed metal electrode, the surface homogenization treatment of complex metal parts represented by the rotary body structure can be realized. The metal electrode is flexible in processing, simple in use and low in cost, and can be applicable to the surface treatment of various complex structure metal parts.

[0051] 3. The present invention can achieve precise control of the surface to be treated. By using a spacer layer to cover the non-treated surface and isolate its direct contact with the electrolyte, the influence on the non-treated surface during the surface treatment process can be avoided, so as to meet the precise treatment of the specified surface in the complex metal part structure and avoid waste of resources at the same time.

[0052] 4. The present invention can achieve the homogenization of the treated surface. Through the uniquely designed electrode plate, the current of the surface treatment can flow in from the geometric center of the part to be oxidized, so that the distribution of the current on the part to be oxidized is more uniform, and the effect of the surface treatment is therefore more uniform.

[0053] 5. The surface treatment process of the present invention is stable and reliable. Through the coordinated cooperation of devices such as the workbench and the lifting rod, the positional relationship of each part can be ensured to be consistent during each surface treatment, so the working condition stability is high and the repeatability is high.

[0054] 6. The cleanliness of the surface of the present invention is high. Compared with the commonly used sandblasting treatment for complex metal structures, the present invention can achieve no pollution and no residue of sundries on the metal surface after oxidation, and the surface cleanliness is high, which is beneficial to the high-quality connection between the metal surface and the polymer. Brief Description of the Drawings

[0055] Figure 1 It is a schematic diagram of the surface treatment device and method applied to the connection surface of a metal / polymer valve assembly of the present invention;

[0056] Figure 2 It is a schematic diagram of the metal valve part for oxidation in Embodiment 1 of the present invention;

[0057] Figure 3 It is a schematic diagram of the electrode plate used in Embodiment 1 of the present invention;

[0058] Figure 4 It is a schematic diagram of the connection between the metal part and the corresponding electrode plate in another preferred embodiment of the present invention;

[0059] Figure 5 Schematic diagram of a metal part in another preferred embodiment of the present invention;

[0060] Figure 6 Schematic diagram of the electrode sheet used in another preferred embodiment of the present invention;

[0061] Figure 7 Morphology diagram of the bottom surface of the groove after anodizing of the metal valve in a preferred embodiment of the present invention;

[0062] Figure 8 Morphology diagram of the side surface of the groove after anodizing of the metal valve in a preferred embodiment of the present invention;

[0063] In the figure: 1 - Anode metal electrode sheet, 11 - Valve connection part, 12 - Lifting connection part, 2 - Cathode electrode, 3 - Liquid storage container, 4 - Lifting mechanism, 5 - Surface treatment equipment, 6 - Metal valve, 7 - Workbench, 8 - Wire. Specific implementation mode

[0064] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0065] A surface treatment method and device applied to the connection surface of a metal / polymer valve assembly, including the following steps:

[0066] (1) Use acid- and corrosion-resistant adhesive tape or surface isolation layer to wrap the non-connection surface of the metal valve that needs to be immersed in the solution used for surface treatment during the surface treatment process, so as to isolate the solution and avoid being affected;

[0067] (2) Embed a metal electrode sheet with a unique through-hole structure at the top of the metal valve;

[0068] (3) Connect the metal valve to the lifting rod of the workbench through the through-hole in (2);

[0069] (4) Use a wire to connect the metal valve to the anode of the surface treatment equipment through the metal electrode sheet in (2); then immerse the cathode (including but not limited to platinum sheet, graphite rod, etc.) and the anode (metal valve) in the solution placed on the workbench, and use the surface treatment equipment to perform surface treatment on the connection surface of the valve assembly.

[0070] The device involved mainly consists of a workbench, a lifting rod, an electrochemical device, an electrode sheet, an electrolyte, acid-resistant adhesive tape, etc.

[0071] As a preferred technical solution, the layer for isolating the non-oxidized surface and the electrolyte in step (1) includes, but is not limited to, adhesive tape, coating, ink, etc. Its acid and corrosion resistance properties depend on the nature of the electrolyte, and it only needs to play a role in isolating the non-oxidized surface and the electrolyte. Preferably, one layer is wrapped or coated.

[0072] As a preferred technical solution, the workbench is a square metal plate with a certain number of screw holes for placing the container with the electrolyte; the lifting rod is fixed to the workbench by threads to connect the metal valve and adjust the height of the valve parts during the surface treatment process; the electrode plate is connected to the top of the metal valve by thread fit, and the current is conducted to the metal valve through the electrode plate, so that the current is evenly distributed on the metal valve during the surface treatment process. At the same time, the upper part of the electrode plate is sheet-shaped for easy connection with the wire.

[0073] As a preferred technical solution, the size of the workbench can be selected according to the size of the metal valve parts to be surface-treated. The size of the screw holes on the workbench is M4 - M12, the screw hole pitch is 20mm - 100mm, and the screw holes are evenly distributed on the workbench.

[0074] As a preferred technical solution, the lifting rod with a certain height is fixed to the appropriate position on the workbench by thread fit. The height range of the lifting rod depends on the actual needs, and the preferred height is 8cm - 50cm; the lifting rod can be selected as manual or automatic according to the actual needs, so that the metal valve connected to the lifting rod can adjust its height according to the surface treatment process and select the immersion depth of the electrolyte according to the actual needs; at the same time, according to the loss amount of the electrolyte during the surface treatment process, the height of the metal valve to be treated can be adjusted by an electric structure (including, but not limited to, gear structure, thread structure, etc.).

[0075] As a preferred technical solution, the lifting rod consists of two parts. One part is a circular metal rod fixed to the workbench by the threads at the bottom, and the height range of the circular metal rod is 8cm - 50cm; the other part is a slotted metal frame with a circular opening on one side for connecting with the above circular metal rod to adjust the height; one or more circular through holes are opened on the other side of the metal frame. During use, the upper part of the electrode plate with through holes passes through the slot of the metal frame, so that the through holes of the electrode plate overlap with the through holes of the metal frame, and the electrode plate is fixed to the horizontal metal frame of the lifting rod with bolts, etc.; the length range of the metal frame is 20cm - 50cm. The lifting rod can be an electric structure and can adjust the height of the metal valve parts according to the setting. According to the actual needs, the control speed range of the electric lifting rod is between 0.5mm / h and 10mm / h.

[0076] As a preferred technical solution, the metal valve can be any complex structure such as a rotary body structure. The metal part should have or be machinable with a structure for connecting the electrode plate, and this structure avoids the functional surface and does not affect the function of the valve flap.

[0077] As a preferred technical solution, the material of the electrode plate can be any conductive material, preferably the same material as the part to be surface-treated, so as to reduce the influence caused by the difference in conductivity coefficient and the influence caused by uneven current distribution. Threads are machined at the bottom end of the electrode plate, and the thread size is determined according to the top screw hole of the metal part to be oxidized. It is required that the electrode plate can form a connection with the part to be oxidized through thread fitting to form a conductive path. During the surface treatment process, the current is conducted to the metal part through the metal electrode, and its rotary body structure makes the current distribution in the metal part more uniform during the surface treatment process.

[0078] As a preferred technical solution, the electrode plate is connected to the top of the metal valve through thread fitting, and the thread size is determined according to the size of the top screw hole of the metal valve; the part of the electrode plate for wire clamping is sheet-shaped, with a thickness of 0.5 mm to 5 mm; the part of the electrode plate for wire clamping should not be too long, and the length range is 1 cm to 5 cm; the material of the electrode plate is determined according to the material of the metal valve, preferably the same material as the metal valve. One or more through holes are machined in the upper sheet-shaped area of the electrode plate for connecting the metal valve part to the lifting rod to facilitate height adjustment, and the through hole size range is φ2 to φ8. The maximum diameter of the metal electrode plate is preferably between 0.5 mm and 3 cm.

[0079] As a preferred technical solution, the structure of the special electrode plate connected to the metal part is preferably a thread structure, which can be an internal thread or an external thread; the length of this structure should not be too long, preferably 1 / 3 of the total length of the metal electrode, and the length range is preferably 0.5 cm to 5 cm; the type and parameters of the thread are determined according to actual needs and are not limited. Triangular threads are preferred.

[0080] As a preferred technical solution, the electrochemical device has a constant current mode and a constant voltage mode. During the surface treatment process, the voltage selection range is 1 V to 50 V, the current selection range is 0.1 A to 10 A, and the surface treatment time is between 10 min and 180 min.

[0081] As a preferred technical solution, the electrolyte can be any solution suitable for metal anodic oxidation, preferably an acid solution such as sulfuric acid solution, phosphoric acid solution, etc.; the volume fraction range of the electrolyte is 5% to 30%, and the mass fraction range of the electrolyte is preferably 5 g / L to 100 g / L; the volume of the electrolyte is determined according to the shape, size of the metal part and the container used, and it is required to be able to meet the volume required for surface treatment.

[0082] As a preferred technical solution, the cathode materials used in the surface treatment process include, but are not limited to, platinum sheets, graphite rods, etc.; the area of the cathode is determined according to the surface area of the anode metal valve to be treated, and the preferred range of the cathode area is 1 cm 2 ~50 cm 2 .

[0083] As a preferred technical solution, during the electrochemical surface treatment process, the temperature of the electrolyte can be controlled according to actual needs. The preferred surface treatment temperature is 0°C to 40°C, and the temperature control means and equipment include, but are not limited to, water bath temperature control, etc.

[0084] As a preferred technical solution, during the electrochemical surface treatment process, the electrolyte can be stirred, and the stirring methods and equipment include, but are not limited to, magnetic stirrers, etc.

[0085] The following will be described in detail with specific embodiments.

[0086] Unless otherwise specified, the reagents, methods, instruments and equipment used in the present invention are conventional reagents, methods, instruments and equipment in the art. Unless otherwise specified, the reagents and materials used in the following examples are all commercially available.

[0087] Example 1

[0088] As Figure 1 , fix the lifting rod (lifting mechanism 4) at a suitable position on the workbench 7, and it is required to be fixed tightly without moving or deflecting during the surface treatment process. Here, the fixed position of the lifting rod is near the edge on one side of the workbench 7, and space is left on the other side to place other oxidation devices; the three-dimensional size of the workbench 7 is 400 mm * 300 mm * 10 mm, the screw hole size of the workbench 7 is M8, the screw hole pitch is 40 mm, the screw holes are evenly distributed on the workbench 7, the height of the circular metal rod of the lifting rod is 400 mm, and the total length of the metal frame is 350 mm.

[0089] As Figure 1 , place a certain volume of prepared sulfuric acid solution in the electrolytic cell container (liquid storage container 3). Here, the height of the electrolyte in the container is 40 mm, place the electrolyte container at a suitable position on the workbench 7, and the volume fraction of the sulfuric acid solution is 20%.

[0090] As Figure 2 , before anodic oxidation, wrap the non-oxidized surface of the cleaned metal valve part (metal valve 6) with acid-resistant adhesive tape. In this example, only the groove surface of the metal valve 6 is treated.

[0091] As Figure 1 ​, connect the metal valve part wrapped with adhesive tape to the valve connection part 11 of the electrode plate (anode metal electrode plate 1) through thread fitting to ensure a more uniform current spatial distribution on the surface to be oxidized during the anodizing process. The total length of the electrode plate is 40 mm, and the outer diameter is 10 mm; among them, the thread length of the bottom end with a diameter of φ8 is 10 mm, the thread is a right-handed single-thread ordinary external thread, the pitch is 1.5 mm, and its thread parameters match those of the metal part. The thickness of the upper part for the wire clamping flat plate area (lifting connection part 12) is 2 mm, and the length is 18 mm.

[0092] As Figure 1 , pass the upper plate-shaped area of the electrode plate connected with the metal valve part through the slot hole of the lifting rod metal frame, so that the through hole on the electrode plate overlaps with the through hole on one side of the lifting rod metal frame. The sizes of the through holes on the electrode plate and the metal frame are both φ5. The number of through holes on the metal frame is 5, the center distance of the through holes is 8 mm, and they are evenly distributed on the side of the metal frame away from the circular metal rod.

[0093] As Figure 1 , connect the electrode plate connected with the metal valve part to the metal frame of the lifting rod through screws to fix the position of the metal valve part to be oxidized above the oxidation liquid container.

[0094] As Figure 1 , connect the upper part of the electrode plate with the fixed positional relationship to the anode of the electrochemical device (surface treatment device 5) through wire 8, connect the platinum sheet cathode (cathode electrode 2) to the cathode of the electrochemical device through wire 8. The size of the platinum sheet cathode is 15 mm * 15 mm. The cathode is in the middle of the oxidation liquid in the depth direction. Place the cathode on one side of the electrolyte container, and reserve a position on the other side for placing the metal valve part to be oxidized.

[0095] Select constant current mode for anodizing, and set the current to 5 A.

[0096] Adjust the height position of the lifting rod metal frame to immerse the metal valve part in the oxidation liquid, and control the height position of the surface to be oxidized to be in the middle of the oxidation liquid in the depth direction.

[0097] Control the oxidation time to be 120 min. After the oxidation process is over, adjust the lifting rod, take out the metal valve part, and perform cleaning.

[0098] During the anodizing process of this embodiment, temperature control was not carried out. At the same time, due to the small consumption of the electrolyte, the height of the metal valve part was not adjusted during the anodizing process.

[0099] Figure 7 It is the topographic map of the bottom surface of the groove after anodizing the metal valve in this embodiment;

[0100] Figure 8It is the topographical map of the side of the groove after anodizing the metal valve for this embodiment.

[0101] Based on the above results, surface treatment of metal valve parts by this method and device has significant effects; at the same time, the uniformity of surface treatment at different positions is relatively high.

[0102] Embodiment 2

[0103] Fix the anodizing device according to the positional relationship described in Embodiment 1. The types, quantities, sizes, and structures of the devices used are the same as those in Embodiment 1.

[0104] The electrolyte used is a sulfuric acid solution with a volume fraction of 10%, and the solution volume is the same as that in Embodiment 1.

[0105] Connect the metal valve parts wrapped with adhesive tape to the oxidation device and place them in the electrolyte. The wrapping method, connection method of the metal valve parts, depth, and position of the metal valve parts in the electrolyte are the same as those in Embodiment 1.

[0106] After the electrochemical equipment is connected, select the anodizing mode as the constant current mode and set the current to 5A.

[0107] Control the oxidation time to be 60 minutes. After the oxidation is completed, take out the metal valve parts and conduct cleaning.

[0108] During the anodizing process of this embodiment, temperature control is not carried out. At the same time, due to the small consumption of the electrolyte, the height of the metal valve parts is not adjusted during the anodizing process. Surface treatment of metal parts by this method and device also has obvious effects.

[0109] Comparative Example 1

[0110] Fix the anodizing device according to the positional relationship described in Embodiment 1. The difference is that in this comparative example, electrode plates are not used, but the anode wire is directly clamped on one side of the top structure of the metal valve parts. The types, quantities, sizes, and structures of the other devices used are the same as those in Embodiment 1.

[0111] The electrolyte used is a sulfuric acid solution with a volume fraction of 20%, and the solution volume is the same as that in Embodiment 1.

[0112] Connect the metal valve parts wrapped with adhesive tape to the oxidation device and place them in the electrolyte. The wrapping method, connection method of the metal valve parts, depth, and position of the metal valve parts in the electrolyte are the same as those in Embodiment 1.

[0113] After the electrochemical equipment is connected, select the anodizing mode as the constant current mode and set the current to 5A.

[0114] Control the oxidation time to 120 min. After the oxidation is completed, take out the metal valve parts and clean them.

[0115] In this comparative example, temperature control was not carried out during anodic oxidation. At the same time, since the consumption of the electrolyte was small, the height of the metal valve parts was not adjusted during anodic oxidation.

[0116] Although the surface treatment of aluminum alloy parts can be achieved by this method, the structure of the area near the anode wire connection in the metal parts is rougher, while the structure of the area far from the anode wire connection is smoother. It is difficult to ensure the uniformity of its surface structure.

[0117] In summary, the present invention can achieve anodic oxidation treatment of a specified surface of a complex structure, and can control the process and effect of surface treatment by adjusting the implementation process, can efficiently and stably achieve the homogenization treatment of the metal surface, and at the same time ensure the cleanliness of the treated surface, which is beneficial to improving the quality of its connection with polymers.

[0118] The present invention provides a surface treatment method and device applied to the connection surface of a metal / polymer valve assembly, which can perform anodic oxidation treatment on a specified surface in a complex metal structure such as a valve structure, and achieve precise control of the surface treatment effect of the oxidized surface; at the same time, through the design of the surface treatment device, the homogenization and effectiveness of the treatment of the specified surface of the metal valve are improved.

[0119] The above embodiments are only examples given to clearly illustrate the present invention, and do not limit the implementation manner and process of the present invention. In addition, the present invention does not limit the shape, positional relationship, surface morphology and size after oxidation of the equipment, etc. For those skilled in the art, modifications and implementation changes can be made according to the idea of the present invention. Therefore, all technical solutions obtained by those skilled in the art in this technical field through logical analysis, reasoning or experiments according to the concept of the present invention are within the protection scope determined by the claims.

[0120] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. An apparatus for surface treatment of the connecting surface of a metal / polymer valve assembly, characterized in that, It includes an anode metal electrode sheet (1), a cathode electrode (2), a liquid storage container (3), a lifting mechanism (4), a surface treatment device (5) and a partition structure. The anode metal electrode sheet (1) and the cathode electrode (2) are both connected to the surface treatment device (5); The anode metal electrode sheet (1) includes a valve connection part (11) connected to a metal valve (6) and a lifting connection part (12) capable of being connected to the lifting mechanism (4); The liquid storage container (3) is filled with electrolyte. The metal valve (6) and the cathode electrode (2) are placed in the liquid storage container (3). The non-connection surface of the metal valve (6) is wrapped with a partition structure. The metal valve (6) is connected to the anode metal electrode sheet (1) through the valve connection part (11), and the anode metal electrode sheet (1) is connected to the lifting mechanism (4) through the lifting connection part (12).

2. The device for surface treatment applied to the connection surface of a metal / polymer valve assembly according to claim 1, characterized in that, The top of the metal valve (6) is threadedly connected to the valve connection part (11), and current is conducted to the metal valve (6) through the anode metal electrode sheet (1).

3. The device for surface treatment applied to the connection surface of a metal / polymer valve assembly according to claim 1, characterized in that, The metal valve (6) is of a rotary body structure, with an external thread or an internal thread for threaded connection with the valve connection part (11) provided at the top, and the valve connection part (11) is provided with an internal thread or an external thread corresponding to the thread at the top of the metal valve.

4. The device for surface treatment applied to the connection surface of a metal / polymer valve assembly according to claim 1, wherein The lifting connection part (12) is in a sheet-like structure with a thickness of 0.5 mm to 5 mm, and through holes for connection with the lifting mechanism (4) are provided thereon; The lifting connection part (12) is connected to the surface treatment device (5) through an anode wire.

5. The device for surface treatment applied to the connection surface of a metal / polymer valve assembly according to claim 1, characterized in that, The length of the valve connection part (11) is 30 - 35% of the total length of the anode metal electrode sheet (1), with a length range of 0.5 cm to 5 cm and a diameter between 0.5 mm and 3 cm.

6. The device for surface treatment applied to the connection surface of a metal / polymer valve assembly according to claim 1, wherein It further includes a workbench (7), and the liquid storage container (3) and the lifting mechanism (4) are arranged on the workbench (7); The lifting mechanism (4) includes a vertical rod vertically arranged on the workbench (7) and a horizontal rod arranged on the vertical rod. The horizontal rod is horizontally arranged above the liquid storage container (3), and the anode metal electrode sheet (1) is connected to the horizontal rod through the lifting connection part (12).

7. The device for surface treatment applied to the connection surface of a metal / polymer valve assembly according to claim 1, characterized in that, The surface treatment device (5) has a constant current mode and a constant voltage mode. During the surface treatment process, the voltage selection range is 1 V to 50 V, the current selection range is 0.1 A to 10 A, and the surface treatment time is between 10 min and 180 min.

8. The device for surface treatment applied to the connection surface of a metal / polymer valve assembly according to claim 1, characterized in that, The material of the cathode electrode (2) includes a platinum sheet and a graphite rod; The material of the anode metal electrode sheet (1) is the same as that of the metal valve (6); The electrolyte includes a sulfuric acid solution and a phosphoric acid solution; The partition structure includes acid and corrosion resistant adhesive tape.

9. A method for surface treatment applied to the connection surface of a metal / polymer valve component, characterized in that, Using the device according to any one of claims 1 - 8, includes the following steps: S1: Wrapping the non-connection surface of the metal valve (6) with the partition structure; S2: Connecting the metal valve (6) to the valve connection part (11) and connecting the metal valve (6) to the lifting mechanism (4) through the lifting connection part (12); S3: Connecting the metal valve (6) to the anode of the surface treatment device (5) through the anode metal electrode sheet (1) using an anode wire; S4: Immerse the cathode electrode (2) and the metal valve (6) into the electrolyte in the liquid storage container (3). The cathode electrode (2) is connected to the cathode of the surface treatment device (5) through a cathode wire, and use the surface treatment device (5) to perform surface treatment on the metal valve (6).

10. The method for surface treatment applied to the connection surface of a metal / polymer valve assembly according to claim 9, characterized in that, During the surface treatment process, control the temperature of the electrolyte and control the surface treatment temperature to be 0°C to 40°C.

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