TW202328501A - Method for plating black nickel surface treatment of usb inner housing and a connector having the same - Google Patents

Abstract

The present disclosure provides a method for plating black nickel surface treatment of USB inner housing and a connector having the same. The present disclosure improves aesthetic effect of the product. The present disclosure cleans a USB stainless surface of an inner iron housing. Then the normal nickel is electroplated. Then the plating black nickel is implemented. The housing comprises a tongue plate. The tongue plate includes a base plate. The base plate is disposed on one side of the tongue plate. A terminals is disposed between the base plate and the tongue plate. The housing comprises a substrate which is stainless steels. The surface of the housing includes composite coatings in a layered-structure. The composite coating comprises a pre-plating nickel layer, a normal nickel layer, and a black nickel layer. The present disclosure is applied on computer peripheral equipments. The products of the present may have uniform tincture, improving the aesthetic effect of the product and improving the product corrosion resistance.

Description

Black nickel-plated surface treatment process of USB inner shell and associated connector

The invention relates to the technical field of connectors, in particular to a surface treatment method for black-nickel plating of a USB inner shell of a connector.

With the continuous development of electronic products, connectors are widely used. Connectors are widely used in charging and signal transmission of electronic products. Connectors adapt to performance trends such as faster, more compatible, and more durable. USB connectors are used in information and communication products such as personal computers and mobile devices, and have been extended to photographic equipment, digital TVs, game consoles and other related fields, and have been widely used in various external devices.

The USB connector has a hot-swappable function, and the USB connector can be connected to a variety of peripheral devices; due to the hot-swappable function of the USB connector, the USB connector needs to be reliable, more durable and safe, and the wear resistance and resistance of the existing connector inner shell The corrosion ability is poor; and the conventional USB inner shell is electroplated with black nickel, and the color of the coating is light black, which does not have a thick and deep black appearance.

In order to overcome the disadvantages of the prior art, the first object of the present invention is to provide a surface treatment process of black nickel plating on the USB inner shell, which can achieve the effect of improving the aesthetics of the product.

The second purpose is to provide a connector with a USB inner shell made by a black nickel-plated surface treatment method, which can improve the corrosion resistance of the product while maintaining the product quality.

In order to solve the prior art problems, the present invention adopts the following technical means:

A surface treatment process of black nickel plating on a USB inner shell, the method is as follows: Step §10. degreasing treatment; Step §11, feeding: the shell workpiece is put in, and the shell workpiece is prepared for production; Step 12. Cleaning: Degreasing and decontaminating the shell workpiece; Step §121, degreasing: adding degreasing powder (skimming powder) to the degreasing tank, and the degreasing powder is degreasing under the condition of cathodic current; Process conditions: degreasing powder concentration 50~120g/L, temperature 50~65℃, degreasing time 5~10s, voltage 2~12V, cathode current density 5~10ASD; Remove oil in the oil removal tank to completely remove the stamping oil residue on the stamping surface of the shell workpiece; Step §13, water washing: the water washing nozzle is tilted at an angle of 30~60, and the shell workpiece product is rinsed, and the water quality is clean; the degreasing solution remaining on the stamping surface of the shell workpiece is cleaned; Step §20. Electroplated nickel (common nickel + black nickel): The material shell workpiece is put into (enter) the continuous electroplating line (machine). Step §22, common nickel plating: In nickel plating solution: Nickel ions: 70~120g/L; (Nickel ions are made of nickel sulfamate) Nickel chloride: 5~15g/L; Boric acid: 35~55g/L; Process conditions: temperature 50~65℃, pH value 3.8~4.4, time 5~10s, voltage 2~12V; Film thickness control: 0.1~10μm; Step §221, water washing: wash the nozzle with water at 30-60 degrees, rinse the product, and the water quality is clean. Step §23, black nickel plating: In the black nickel plating solution: Stannous pyrophosphate: 60~160g/L; Potassium pyrophosphate: 180~340g/L; Nickel chloride: 8~15g/L; Nickel sulfate: 130~220g/L; Black nickel agent: 10~50ml/L; Process conditions: temperature 30~55℃, pH value 4~5.5, time 5~20s, voltage 1~8V, current density (A/m2): 1~5, anode: carbon plate (or tin plate, or nickel plate) ; Nickel film thickness control: 0.025~10μm. Step §30. Receipt: Step §31, water washing: the water washing nozzle is tilted at an angle of 30~60, and the product is rinsed, and the water quality is clean; Step §32, drying: temperature 100~130℃, time 10~20s; Step §33, inspect the package: visually compare the color samples, if there is no significant difference, inspect the package.

Further, in some embodiments, after step §121 degreasing, add step §122 pickling and polishing; Step §122, pickling and polishing: Sulfuric acid is added to the electropolishing tank: acid neutralization is carried out at the same time as polishing; stamping burrs are removed to obtain a flat substrate surface and reduce the porosity of the coating; Process conditions: sulfuric acid 30~40ml/L, temperature at room temperature, anode current density 5~50ASD, anode electrode 3~7V, cathode 316L stainless steel plate or copper plate, time 5~10s.

Further, in some embodiments, before this step §22 nickel plating, step §21 pre-nickel plating is added; Step §21, pre-nickel plating: In the pre-plating nickel solution: Nickel sulfate: 150~220g/L; Nickel chloride: 5~15g/L; Boric acid: 35~55g/L; Process conditions: temperature 50~65℃, pH value 3.8~4.4, time 5~10s, voltage 2~12V; Film thickness control: 0.025~1μm.

Further, in some embodiments, after the step §21 pre-nickel plating, step §211 water washing is added; Step §211, water washing: wash the nozzle with water at 30-60 degrees to rinse the product, and the water quality is clean.

A connector, comprising a shell made of the above-mentioned USB inner shell with black nickel-plated surface treatment process; a tongue plate is inserted in the shell, and a base is provided at the end of the tongue plate away from the shell, and the base and A terminal group embedded and molded is arranged in the tongue plate; The shell (USB inner shell) includes a base material, the base material is stainless steel (SUS), and the surface of the base material of the shell has a composite coating with a stacked structure, and the composite coating on the surface of the base material is sequentially outward , According to the plating sequence, it is a pre-plating nickel layer, a common nickel layer, and a black nickel layer; The pre-plating nickel layer is nickel plating, thickness: 0.025~1μm; The ordinary nickel layer is an ordinary Ni plating layer, thickness: 0.1~10μm; The black nickel layer is a black Ni plating layer with a thickness of 0.025-10 μm.

Further, in some embodiments, the plug-in end of the terminal set is disposed on the tongue plate; the free end of the terminal set extends out of the base; The thickness of the pre-plating nickel layer: 0.03~0.2μm; The thickness of the ordinary nickel layer: 2~3μm; The thickness of the black nickel layer: 0.05~0.85μm.

The invention adopts the USB connector manufactured by the black nickel-plated surface treatment technology of the USB inner shell. The product is mainly used in the field of computer peripheral equipment, PC, etc., and the appearance and color of the product are uniform, and the aesthetic effect of the product is improved, and the anti-corrosion ability of the product is also improved at the same time. The present invention better ensures the compactness of the plating layer of the USB inner shell, significantly improves the anti-salt spray performance, and can withstand the salt spray environment of more than 24H without rusting.

In order to further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The implementation of the present invention is described below through specific specific examples, so that those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in the description of the present invention based on different viewpoints and applications without departing from the spirit of the present invention.

The invention improves the anti-corrosion performance of the product and the aesthetics of the product, improves the quality of the product, improves the anti-corrosion ability of the product, and obtains stacked coatings with uniform appearance and color of the product.

A kind of black nickel-plated surface treatment process of the USB inner shell of the present invention, its method is mainly realized by performing the following steps, and the specific embodiments are as follows: Step §10. Degreasing treatment. Step §11, feeding: the shell workpiece is put in, and the shell workpiece is prepared for production. Step 12. Cleaning: Degreasing and decontaminating the shell workpiece; Step §121, degreasing: adding degreasing powder (skimming powder) to the degreasing tank, and the degreasing powder is degreasing under the condition of cathodic current; Process conditions: degreasing powder concentration 50~120g/L, temperature 50~65℃, degreasing time 5~10s, voltage 2~12V, cathode current density 5~10ASD; Remove the oil in the oil removal tank to completely remove the stamping oil residue on the stamping surface of the shell workpiece. Step §122, pickling and polishing: Sulfuric acid is added to the electropolishing tank: acid neutralization is carried out at the same time as polishing, to remove stamping burrs and obtain a flat substrate surface, and reduce the porosity of the coating; Process conditions: sulfuric acid 30~40ml/L, temperature at room temperature, anode current density 5~50ASD, anode electrode 3~7V, cathode 316L stainless steel plate or copper plate, time 5~10s. Step §13, water washing: the water washing nozzle is tilted at an angle of 30-60, and the shell workpiece product is rinsed, and the water quality is clean; the degreasing solution remaining on the stamping surface of the shell workpiece is cleaned. Step §20. Electroplated nickel (common nickel + black nickel): The material shell workpiece is put into the continuous electroplating line. Step §21, pre-nickel plating: In the pre-plating nickel solution: Nickel sulfate: 150~220g/L; Nickel chloride: 5~15g/L; Boric acid: 35~55g/L; Process conditions: temperature 50~65℃, pH value 3.8~4.4, time 5~10s, voltage 2~12V; Film thickness control: 0.025~1μm; Step §211, water washing: wash the nozzle with water at 30-60 degrees, rinse the product, and the water quality is clean; Step §22, common nickel plating: In nickel plating solution: Nickel ions: 70~120g/L; (Nickel ions are made of nickel sulfamate) Nickel chloride: 5~15g/L; Boric acid: 35~55g/L; Process conditions: temperature 50~65℃, pH value 3.8~4.4, time 5~10s, voltage 2~12V; Film thickness control: 0.1~10μm; Step §221, water washing: wash the nozzle at 30-60 degrees, rinse the product, and the water quality is clean; Step §23, Black Nickel Plating (Henderson Plating): In the black nickel plating solution: Stannous pyrophosphate: 60~160g/L; Potassium pyrophosphate: 180~340g/L; Nickel chloride: 8~15g/L; Nickel sulfate: 130~220g/L; Black nickel agent: 10~50ml/L; Process conditions: temperature 30~55℃, pH value 4~5.5, time 5~20s, voltage 1~8V, current density (A/m2): 1~5, anode: carbon plate (or tin plate, or nickel plate) ; Nickel film thickness control: 0.025~10μm; Step §30. Receipt: Step §31, water washing: the water washing nozzle is tilted at an angle of 30-60 degrees to rinse the product, and the water quality is clean; Step §32, drying: temperature 100~130℃, time 10~20s; Step §33, inspect the package: visually compare the color samples, if there is no significant difference, inspect the package.

Further, the connector of the present invention includes a shell 61 and a tongue plate 62 inserted in the shell 61, one end of the tongue plate 62 is provided with a base 63, and the base 63 and the tongue plate 62 are provided with A terminal group 64 embedded in the molding;

The insertion end of the terminal set 64 is disposed on the tongue plate 62 ; the free end of the terminal set 64 extends out of the base 63 .

The shell 61 (USB inner shell) includes a base material 40, the base material 40 is stainless steel (SUS). The composite coating is sequentially outwards, and successively is a pre-plating nickel layer 41, a common nickel layer 42, and a black nickel layer 43; The pre-plated nickel layer 41 is a nickel plated layer with a thickness of 0.025-1 μm; The common nickel layer 42 is a common Ni plating layer with a thickness of 0.1-10 μm; The black nickel layer 43 is a black Ni plating layer with a thickness of 0.025-10 μm.

The shell 61 (USB inner shell) stacking coating description: label Plating Plating layer Film thickness (μm) 40 / SUS stainless steel substrate 41 Nickel pre-plated Pre-plated nickel layer 0.025~1 42 Plated Ni Common nickel layer 0.1~10 43 Black Ni plating black nickel layer 0.025~10

Further, in some embodiments, the thickness of the pre-plating nickel layer 41 is 0.03-0.2 μm; the thickness of the common nickel layer 42 is 2-3 μm; the thickness of the black nickel layer 43 is 0.05-0.85 μm.

This production technology invention is applied to the production of nickel plating (pre-plating nickel + ordinary nickel + black nickel) on the inner iron shell of the USB. The process is as follows:

①Clean the surface of the USB stainless steel inner iron shell; ②Electroplate ordinary nickel first + ③Finally black nickel plating, while maintaining the quality of the original product, the appearance color is uniform, and it can also achieve the effect of improving the aesthetics of the product; at the same time, it also improves the anti-corrosion of the product Ability, salt spray resistance test time increased to more than 24H.

The above description of the embodiments is to facilitate the understanding and application of the technology of this case by those with ordinary knowledge in the technical field. It only expresses an implementation mode of the present invention. Scope limitation. It should be noted that for those with ordinary knowledge in the field, without departing from the concept of the present invention, multiple modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the patent for the present invention shall be subject to the claims of the appended scope of patent application for the invention.

Step §10: Degreasing treatment Step §11: Unloading Step §12: Cleaning Step §121: Degrease Step §122: Pickling and Polishing Step §13: Washing Step §20: Nickel Electroplating Step §21: Pre-Nickel Plating Step §211: Washing Step §22: Nickel Plating Step §221: Washing Step §23: Black Nickel Plating Step §30: Receiving Step §31: Washing Step §32: Drying Step §35: Inspect Packaging 40: Substrate 41: Pre-plated nickel layer 42: common nickel layer 43: black nickel layer 61: shell 62: tongue plate 63: base 64: Terminal group

Fig. 1 is a schematic flow chart of an embodiment of the present invention. Fig. 2 is a schematic flow chart of an oil removal treatment procedure according to an embodiment of the present invention. Fig. 3 is a schematic flow chart of an electroplating nickel procedure according to an embodiment of the present invention. Fig. 4 is a schematic flow chart of the receiving program of the embodiment of the present invention. Fig. 5 is a schematic diagram of a connector according to an embodiment of the present invention. Fig. 6 is a three-dimensional schematic view of the casing of the embodiment of the present invention. Fig. 7 is a cross-sectional structure diagram of the casing (USB inner casing) of the embodiment of the present invention.

§10~§30: Steps

Claims (6)

A kind of black nickel surface treatment process of USB inner shell, its method is as follows: Step §10. Degreasing treatment: Step §11, feeding: the shell workpiece is put in, and the shell workpiece is prepared for production; Step 12. Cleaning: Degreasing and decontaminating the shell workpiece; Step §121, degreasing: adding degreasing powder to the degreasing tank, and the degreasing powder is degreasing under the condition of cathode current; Process conditions: degreasing powder concentration 50~120g/L, temperature 50~65℃, degreasing time 5~10s, voltage 2~12V, cathode current density 5~10ASD; Remove oil in the oil removal tank to completely remove the stamping oil residue on the stamping surface of the shell workpiece; Step §13, water washing: the water washing nozzle is tilted at an angle of 30~60, and the shell workpiece product is rinsed, and the water quality is clean; the degreasing solution remaining on the stamping surface of the shell workpiece is cleaned; Step §20. Electroplated Nickel: The material shell workpiece is put into the continuous electroplating line; Step §22, common nickel plating: In nickel plating solution: Nickel ion: 70~120g/L; Nickel chloride: 5~15g/L; Boric acid: 35~55g/L; Process conditions: temperature 50~65℃, pH value 3.8~4.4, time 5~10s, voltage 2~12V; Film thickness control: 0.1~10μm; Step §221, water washing: wash the nozzle at 30-60 degrees, rinse the product, and the water quality is clean; Step §23, black nickel plating: In the black nickel plating solution: Stannous pyrophosphate: 60~160g/L; Potassium pyrophosphate: 180~340g/L; Nickel chloride: 8~15g/L; Nickel sulfate: 130~220g/L; Black nickel agent: 10~50ml/L; Process conditions: temperature 30~55℃, pH value 4~5.5, time 5~20s, voltage 1~8V, current density 1~5 A/m2, anode: carbon plate; Nickel film thickness control: 0.025~10μm; Step §30. Receipt: Step §31, water washing: the water washing nozzle is tilted at an angle of 30-60 degrees to rinse the product, and the water quality is clean; Step §32, drying: temperature 100~130℃, time 10~20s; Step §33, inspect the package: visually compare the color samples, if there is no significant difference, inspect the package. The black nickel-plated surface treatment process of the USB inner shell as described in claim 1, wherein, after the step §121 degreasing, add the step §122 pickling and polishing; Step §122, pickling and polishing: Sulfuric acid is added to the electropolishing tank: acid neutralization is carried out at the same time as polishing; stamping burrs are removed to obtain a flat substrate surface and reduce the porosity of the coating; Process conditions: sulfuric acid 30~40ml/L, temperature at room temperature, anode current density 5~50ASD, anode electrode 3~7V, cathode 316L stainless steel plate or copper plate, time 5~10s. The black nickel plating surface treatment process of the USB inner shell as described in claim 1, wherein, before the step §22 nickel plating, step §21 pre-nickel plating is added; Step §21, pre-nickel plating: In the pre-plating nickel solution: Nickel sulfate: 150~220g/L; Nickel chloride: 5~15g/L; Boric acid: 35~55g/L; Process conditions: temperature 50~65℃, pH value 3.8~4.4, time 5~10s, voltage 2~12V; Film thickness control: 0.025~1μm. The surface treatment process of black nickel plating on the USB inner shell as described in claim 3, wherein, after the step §21 pre-nickel plating, step §211 water washing is added; Step §211, water washing: wash the nozzle with water at 30-60 degrees to rinse the product, and the water quality is clean. A connector, which includes a shell made of the USB inner shell black nickel-plated surface treatment process described in any one of claims 1 to 4; a tongue plate is inserted in the shell, and the tongue plate is far away from the One end of the housing is provided with a base, and a terminal group is embedded and molded in the base and the tongue plate; The casing includes a base material, the base material is stainless steel, and a composite coating with a stacked structure is formed on the surface of the base material of the housing. Nickel plating layer, a common nickel layer, and a black nickel layer; The pre-plating nickel layer is nickel plating, thickness: 0.025~1μm; The ordinary nickel layer is an ordinary Ni plating layer, thickness: 0.1~10μm; The black nickel layer is a black Ni plating layer with a thickness of 0.025-10 μm. The connector as claimed in item 5, wherein the plug-in end of the terminal group is arranged on the tongue plate; the free end of the terminal group extends out of the base; The thickness of the pre-plating nickel layer: 0.03~0.2μm; The common nickel layer thickness is 2~3μm; The thickness of the black nickel layer: 0.05~0.85μm.

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