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Two-color electroplating process

A technology of two-color electroplating and electroplating process, which is applied in the direction of metal material coating process, superimposed layer plating, coating, etc., can solve the problems of large surface area of ​​electroplating, consume a lot of raw materials, affect matching, etc., and achieve high product qualification rate, Less plating area and cost saving effect

Inactive Publication Date: 2018-01-09
江阴市羽项汽车饰件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the common workpiece substrates in the copper-nickel-chromium electroplating industry are ABS or PC / ABS (PC content is about 30%) monochrome products. This type of workpiece has a large electroplating surface area and consumes a lot of raw materials. get a good surface finish
After electroplating, some workpieces will also affect the matching due to the surface coating
Therefore, two-color material electroplating began to appear in the industry, which is generally used for automotive interior parts (small parts, high matching precision requirements), the common base material is ABS+PC, the part that can be electroplated is ABS material, and the part that cannot be electroplated is PC material. However, the common electroplating defects are overflow plating and exposed plastic, which affect the appearance and quality of the workpiece. Jiangyin Yuxiang has developed a treatment and electroplating process suitable for two-color materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A two-color electroplating process, the steps are as follows: take the parts to be treated by two-color injection molding, and perform pretreatment on it, specifically including steps of hot dip degreasing, roughening, reduction, pre-dipping, palladium activation, and chemical nickel; Treatment and post-treatment adopt hexavalent chromium bright electroplating process or hexavalent chromium pearl nickel electroplating process, and finally get the product processed by two-color electroplating process.

[0051] In the two-color electroplating process, the specific steps of the pretreatment are as follows:

[0052] a. Hot-dip degreasing: heat-dip the product at 45°C for 218s;

[0053] b. Coarsening: Coarse the product in the solution. The solution components are 360g / L chromic acid, 360g / L sulfuric acid, and trivalent chromium<25g / L; the temperature is 62°C, and the time is 490s; after it is recovered wash with water;

[0054] c. Reduction: Soak in reducing agent at room...

Embodiment 2

[0069] A two-color electroplating process, the steps are as follows: take the parts to be treated by two-color injection molding, and perform pretreatment on it, specifically including steps of hot dip degreasing, roughening, reduction, pre-dipping, palladium activation, and chemical nickel; Treatment and post-treatment adopt hexavalent chromium bright electroplating process or hexavalent chromium pearl nickel electroplating process, and finally get the product processed by two-color electroplating process.

[0070] In the two-color electroplating process, the specific steps of the pretreatment are as follows:

[0071] a. Hot-dip degreasing: heat-dip the product at 55°C for 118s;

[0072] b. Coarsening: Coarse the product in the solution, the solution components are chromic acid 400g / L, sulfuric acid 400g / L, trivalent chromium <25g / L; the temperature is 62°C, the time is 390s; after it is recovered wash with water;

[0073] c. Reduction: Soak in reducing agent at room temper...

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PUM

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Abstract

The invention relates to a two-color electroplating process, and belongs to the technical field of water electroplating processes. The two-color electroplating process is characterized in that a two-color injection-molded to-be-treated part is taken to pre-treat, wherein pre-treatment specifically comprises the steps of hot-dipping and oil-removal, roughening, reducing, pre-impregnating, palladiumactivating and chemical nickel plating; the to-be-treated part is subjected to post-treatment, wherein the post-treatment adopts a hexavalent chromium light electroplating process or a hexavalent chromium pearl nickel electroplating process; and finally, a product subjected to the two-color electroplating process is obtained. The product is less in electroplating area and saves cost. A workpiecematched part is not electroplated and hardly affect matching precision. The manufactured part is beautiful, and the product yield is high.

Description

technical field [0001] The invention relates to a two-color electroplating process, which belongs to the technical field of water electroplating process. Background technique [0002] At present, the common workpiece substrates in the copper-nickel-chromium electroplating industry are ABS or PC / ABS (PC content is about 30%) monochrome products. This type of workpiece has a large electroplating surface area and consumes a lot of raw materials. Get a good surface effect. After electroplating, some workpieces will also affect the matching due to the surface coating. Therefore, two-color material electroplating began to appear in the industry, which is generally used for automotive interior parts (small parts, high matching precision requirements), the common base material is ABS+PC, the part that can be electroplated is ABS material, and the part that cannot be electroplated is PC material. However, the common electroplating defects are overflow plating and exposed plastic, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/14C25D5/40C25D5/56C25D3/12C25D3/38C25D3/06C23C18/32C23C18/18C23C28/02
Inventor 高洪洋卢东明马国江张江海徐海
Owner 江阴市羽项汽车饰件有限公司
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