Requirements of Selective Plating | Shieding Before Plating ｜ Insulation Plating

In plastic electroplated parts, it is often required to achieve different effects in different parts of the surface of the part. This requirement also often occurs in electroplated parts. The following three methods are usually used to achieve this function:

1. If it can be divided into parts, it is recommended to make different parts and finally assemble them into one part. If the shape is not complicated and the components are in batches, the cost of opening a small set of injection molds will form a relatively obvious price advantage.

2. If there is no requirement for electroplating in a part that does not affect the appearance, you can usually use the method of adding insulating ink and then electroplating for processing. In this way, the parts sprayed with insulating ink will not be covered with film and meet the requirements. In fact, this is often involved. The problem.

For example, some electroplated parts will become hard and brittle, especially the arms of parts such as buttons, which we do not want to be electroplated because we need them to be fully elastic. At this time, local plating will be Very necessary.

It is also commonly used in other situations. For lightweight products such as PDAs, the circuit board is usually directly fixed on the plastic case. In order to prevent the impact on the circuit, the parts that are in contact with the circuit are usually insulated. At this time, ink is often used to process the local area before electroplating.

3. Another way is to use a process similar to two-color injection molding. Generally, if there is a two-color injection machine, ABS and PC can be injected in different stages and then electroplated after being made into plastic parts. Under such conditions, the two different adhesion of plastics to the electroplating solution causes the ABS part to have an electroplating effect but the PC part not to have an electroplating effect, which meets the requirements.

Another way is to divide the product into two parts. Now one part is injected and then electroplated. The processed product is then put into another set of molds for a second injection to obtain the final sample.