Plastic plating-the method of eliminating the trouble of plating bath by strengthening the management of electroplating process.
Huizhou Boluo Tenglong Technology Co., Ltd. serves you wholeheartedly! Mainly engaged in plastic hydroelectroplating processing, with plastic injection molding processing, mold processing and so on!
First, raise awareness and poor weaving process management.
SMM News: with the development of market economy, the strengthening of electroplating process management and the high quality of products, it is imperative. However, in contact and practice, the author found that many process failures occurred and the disadvantages of product quality were not due to the problems in the process itself or the large error in the process formulation, but to the defects in the process management. In particular, the norms of the front and back processes are ignored, resulting in a series of defects in the coating, such as fog (low layer), blistering, bright skin, yin and yang, patterns, water marks and so on, resulting in the expansion of product rework rate, the increase of cost, and the impact on reputation. It is the easiest to solve the two processes before and after the electroplating process, but it is also the most difficult to implement. There is mainly a misleading view in the operator's mind, that is, "We used to do the same." As a result, there has been a dilemma in process management. To this end, to raise awareness and really put process management in the first place is the first step to eliminate process defects.
Second, common defects in copper-nickel-chromium system:
Systematically speaking, the scope of this system is relatively large, and most of the processes that are widely used at present are:
1. Copper cyanide-bright nickel-chromium.
two。. Copper cyanide-bright acid copper-chromium.
3. Dark nickel-bright acid copper-chromium.
The problems often encountered in the above processes are summarized as follows:
1. Alkali copper bath: the coating is rough, the color is pig liver or dark red, the anode is easy to be passivated, the working voltage is high and so on.
two。. Roll plating bright nickel bath: high working voltage, low current efficiency, insufficient brightness, plating time is not consistent with brightener instructions, long time.
3. Hanging nickel plating: the dense area of small current is dark and black, and the ability of deep plating is poor.
4. Bright acid copper trough: the proportion of light is easy to be maladjusted and difficult to adjust.
5. The phenomena of burr, flower fog and shell are easy to be found in copper-nickel grooves.
6. Plated antenna poles often have a small amount of shell phenomenon.
The main causes of these defects and the guidelines for correction can be considered from the following aspects:
1. According to the requirements of the technological process, improve every process of the technological process, especially the cleaning process and activation process.
two。. The general process composition of cyanide copper plating bath should be controlled as follows:
Copper plating: free NaCN:Cu=0.6-0.8:1.
General copper plating: free NaCN:Cu=0.5-0.7:1.
In a copper plating bath containing potassium tartrate or thiocyanate:
Hanging plating: free NaCN:Cu=0.6-0.6:1.
Roll plating: free NaCN:Cu=0.6-0.7:1.
3. To solve the causes of blistering and shell coating, we should first check the pretreatment process of deoiling and rust removal. What I need to warn you here is that different oils have to choose different deoiling methods. As soon as you listen to this introduction, you can't use that propaganda, because various parts have different shapes, polished oil stains are different, and various materials are different. At the same time, to use weak alkali or strong acid deoiling methods, the effect is different. For example, the shell of the antenna pole is mainly deoiled and thrown, followed by the structure of the hanger. Because copper parts can not be used in high temperature, strong alkali to remove oil, you might as well have a try.
Hot Tags: plastic plating-the method of eliminating the trouble of plating bath by strengthening the management of electroplating process, China, suppliers, manufacturers, factory, custom, wholesale, buy, made in China
