A wide range of custom stamped metals requires surface finishing as a part of the finishing process, from large automotive parts to miniature components for electronics, medical, consumer devices, and other applications. At Connor, we have extensive experience with metal finishing and understand the important aspects of cleanliness and surface finishing with respect to your product. Aside from aesthetics, there are many safety functionalities and industrial applications for it. It helps to prevent laceration from your workers and consumers, it improves the electrical conductivity, enhances resistance to corrosion, abrasions, wear and tear, and increases the solderability of metals among many other reasons.
There are a variety of metal finishing techniques like cleaning, polishing, passivation, anodizing, electroless plating, electroplating, powder coating, and liquid coating, etc.
Connor’s state-of-the-art automated ultrasonic DI water cleaning system has the capability to effectively clean parts from oil and contaminants. We are capable of achieving a 70 Dynes/cm surface tension, which provides better solderability for aluminum parts that require wire bonding application.
Connor is equipped with in-house deburring and polishing equipment, ranging from vibratory finishing, sand-blasting, and brushing. These various processes help remove sharp edges for greater safety, other material imperfections or surface flaws, cleaning and smoothing the surface, or creating uniform surface textures for appearance purposes.
For high aesthetic requirements, Connor is able to provide high uniformity anodizing finishing as well as hard coat anodizing.
Other than product appearance, functionality, and application, the type of material used for plating needs to be considered in the design of a stamped metal part. Especially for precious metals like silver and gold, the cost of these plating materials will contribute a significant cost to the overall part cost. Connor provides design assistance and ESI with our customers; designing their parts for cost efficiency with functionality in mind, we will always recommend the best plating process.
Connor has developed strategic partnerships with regional leading platers, and we are capable of offering custom stampings with various plating solutions.
Pre-plating with tin and nickel. The raw material is pre-plated with non-precious material, and this is usually less expensive than plating each of the individual parts. The limitation of such plating is the cutting edge of the part from the stamping process which will expose base raw materials.
Spot plating with nickel, silver or gold. These precious metals are required for electrical conductivity or application that requires reliability. Spot plating minimizes the use and expense of the material.
Post Plating, ranging from full plating using tin, zinc or zinc nickel or selective plating using nickel, silver or gold. Post plating can be barrel plating, rack plating, or reel to reel plating. Barrel plating is usually used for less critical components using non-precious plating material as compared to rack or reel to reel plating. Rack plating is preferred for intricate parts with complex geometries with a high-quality finish. Reel to Reel plating is used for delicate miniaturized parts when precious metals are used for electrical conductivity and connections.