Realization method of local electroplating process

In our design, it is often required to achieve different effects on different parts of the surface of the plastic part. We usually use the following four methods to achieve this effect:

　　1). Disassemble into small pieces. The different effect parts are made into a small part, and finally assembled together. Under the condition that the shape is not too complicated and the components are in batches, the cost of opening a small mold injection will form a relatively obvious price advantage.

　　2). Add insulating ink. If it is not required to electroplating in the part that does not affect the appearance, it can usually be processed by adding insulating ink and then electroplating, so that there will be no metal coating on the part where the insulating ink is sprayed, which meets the requirements. In fact, this is a part that we often involve in the design, because the parts after electroplating will become hard and brittle, which is an undesirable result, so especially on parts such as buttons, its arm is ours. The part that does not want to be electroplated, because we need it to have sufficient flexibility, partial electroplating is very necessary at this time. In other cases, it is also commonly used. For lightweight products like PDA, the circuit board is usually fixed directly on the plastic shell. In order to prevent the influence on the circuit, the parts that are in contact with the circuit are usually insulated. At this time, ink is often used for local treatment before electroplating.

　　3). Similar to two-color injection molding process. Generally, if you have a two-color injection machine, you can inject ABS and PC in different stages, and then electroplating after making plastic parts. Under such conditions, due to the different adhesion of the two plastics to the electroplating solution, the ABS part is electroplated The effect of the PC part does not have the effect of electroplating, which meets the requirements.

　　4). Second injection. The part is divided into two parts. First, one part is injected and then electroplated, and the processed product is put into another set of molds for secondary injection to obtain the final sample.