understanding of improving the quality of plastic plating

Plastic plating-understanding of improving the quality of plastic plating.
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!
1. The raising of a question.
International plastic electroplating has formed large-scale production in the 1950s, and China also began to produce plastic electroplating in the mid-1960s, which was mainly used for buttons, buckles and other small products at that time. The quality requirements are as good as metal. Nowadays, the driving force for the continuous improvement of the quality requirements of plastic plating lies in the development of foreign-funded enterprises in China, because in the world, especially Japan and Taiwan Province, which are close to China, all hope to make use of the existing conditions in the mainland to process products and reach the required level of quality, which exposes the deficiency of our plastic plating quality and forces us to improve our quality.
two.. Present situation of Electroplating quality of Plastics.
The quality level of plastic plating in advanced industrial countries in the world is indeed very high, and the quality level of plating parts of some foreign-funded units in Guangdong is also good, and some units in Zhejiang are not poor. Mainly manifested in the appearance can be comparable with foreign advanced products, and can meet the quality requirements of foreign-funded enterprises. As for the internal quality, the quality is uneven due to the imperfection of testing methods and testing standards.

3. Causes of quality problems in plastic plating.
For customers, the first is the requirement of appearance, the brightness can generally be achieved, but there is a difference in the comparison of the degree of brightness, the better appearance is "black" in brightness, and the visual sense of brightness {HotTag} is very "thick". Although the so-called "black" and "thick" cannot be found in the standard, the workers who often "deal with" them have perceptual experience. This "black" and "thick" macro feeling is essentially caused by the micro state of the surface, that is to say, the micro surface must be very flat, at least to reach the micro surface of the sine wave. The coating must not be foggy, even if it is a very slight fog, which can not be found in strong light or squarely, but can only be distinguished in a specific angle and light, so it is easy to be ignored.
4. The way to solve the quality problem.
Must have a good pre-plating plastic blank in the past, plastic plating manufacturers only consider whether ABS plastic or electroplating grade ABS plastic, otherwise do not consider, so that they may not be able to plating qualified parts. Like metal plating, unqualified blanks cannot be plated with qualified or good plated parts, especially the blanks of plastic products are more difficult to inspect than those of metal products. If they are not skilled quality inspectors of plastic blanks, it is not easy to see the defects of plastic blanks. After plating the finished products, they find "dots" or "stars", always thinking that it is a problem of electroplating. Therefore, attention should be paid to the plastic blank before plating. First of all, it is necessary to know whether the customer's products have been plated, especially whether the plastic injection parts are the first batch of injection, in order to determine the quality of the blank.
4.2 there must be a quality inspection process for plastic blanks. The quality inspection personnel must be staffed by experienced personnel who are familiar with plastic plating. Paying attention to this link is certainly beneficial to improve the stability of electroplating quality of batches of products, but many factories often disagree.

Avoid the collision of plated parts in the pretreatment process, especially in the etching (coarsening) process of about 70 ℃, when ABS plastic softens at this temperature, the hardness decreases, if there is a collision, it is easy to wipe, and there must be printing points after plating.
4.4 the control of etching degree is to make the surface state of the plated plastic parts meet the appropriate requirements. Excessive etching or insufficient etching will result in poor finish or poor adhesion of the plated products. At present, plastic electroplating often mistakenly believes that the degree of polish depends on bright copper and bright nickel plating, and neglects the control of etching degree, resulting in poor finish. In Japan, many plastic electroplating sets are completed online, and the etching generally does not exceed 3min.
4.5 in terms of operation, non-electrolytic nickel plating is relatively stable and fast, while non-electrolytic copper plating can save expensive palladium salt, the cost is slightly lower, but the stability is poor. The plating bath should be kept clean and not turbid, and the deposition of small particles should be prevented, otherwise the small particles will be "magnified" during bright copper plating to form particle defects, so after metallization, cleaning and wiping can be carried out, especially for large plane plating parts. in order to prevent the existence of powder particles, especially the metallized copper layer can not omit this process. In this process for larger plated parts, there may be some small spots or small parts found exposed plastic, more manufacturers often take local repair, so as to avoid losses caused by rework.
4.6 A reasonable and appropriate fixture for plastic plating is very important, not only to have appropriate conductive contacts, but also to have appropriate tightness, the product should conduct electricity well and clamp, but to prevent the product from deformation due to tight clamping, especially after plating, do not think that there is no deformation after the clamp is removed, the shaping deformation after a large number of electroplating must be taken into account, especially in nickel plating because of the higher temperature.