Plastic Plating-requirements For Local Plating

Plastic plating-requirements for local plating.
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In our design, we often require different effects to be achieved in different parts of the surface of the parts, and there are often such requirements on electroplated parts. We usually use the following three methods to achieve this function:
1. If it can be divided into parts, it is recommended to make different parts, and finally assemble into a part, in the shape is not complex and the component has.
Under the condition of batch, the cost of opening a small set of mold injection will form a relatively obvious price advantage.
two.. If the part that does not affect the appearance is not electroplated, we can usually use the method of electroplating after adding insulating ink, so that the parts sprayed with insulating ink will not have metal coating and meet the requirements. in fact, this is a part that we often involve in design, because the parts after electroplating will become hard and brittle, which is the result we do not want. So its turning arm is the part that we do not want to be electroplated on, especially in parts such as buttons, because we need it to be fully elastic, and local electroplating is very necessary at this time. In other cases, lightweight products such as PDA are often used, the general circuit board is directly fixed on the plastic shell, and 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 for local treatment before electroplating. When partial spraying insulating ink is needed in electroplating design, in the case of the picture above, it is actually impossible to achieve the effect shown in the picture (blue and purple represents the part of electroplating). Because the electroplating part has to form a connected loop in order to form a good electrocoating on each part, and as shown in the figure, each electroplating surface is divided into many parts, unable to achieve a uniform electroplating effect. The above components can finally be realized in the way pictured above, and only by forming a good loop can the current react well with the ions in the liquid, and a good electroplating effect can be achieved.
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 the plastic parts can be electroplated. Under such conditions, due to the different adhesion of the two kinds of plastics to the plating solution, the part of ABS has the effect of electroplating while the part of PC has no effect of electroplating. Another way is to divide the part into two parts. Now one part is treated by electroplating after injection, and the treated products are loaded into another set of moulds for secondary injection to get the final sample.