Name: Suzhou cycas Microelectronics Co., Ltd.
Address: 1st floor,B06 building,No.2,Fuxing Road,Zhangjiagang Economic Development Zone,Jiangsu Province 215600PRC
Stainless steel decorative etching technology?
The process principle of chemical etching pattern and characters on stainless steel surface is that the surface of stainless steel etching plate is not covered by the etching part by the anti acid or alkali resistant ink of silk screen printing, and the etching solution is shielded, so that the etching solution can only contact the surface of the part to be etched, so as to achieve the purpose of etching pattern and characters from the surface, which is subdivided into positive etching and negative etching. Positive etching is the figure to be processed The pattern is left behind, and the rest of the large surface is completely removed, so that the pattern protrudes from the surface and presents a micro relief effect. On the contrary, etching of the stencil is to remove the part of the pattern to make it concave and achieve the purpose of etching decoration.
Stainless steel etching process generally consists of the following parts in turn: stainless steel surface purification treatment, printing acid resistant ink, etching, film removal, baking, painting, baking, peritoneum, shearing, etc.
In general, the stainless steel surface is 8K smooth surface or straight line drawing surface, with models 201 and 304. In the process of production and sale, the surface is generally sealed with a protective oil ester. In order to make the corrosion resistant layer adhere well, the oil layer must be removed. According to the different requirements of production, the oil can be removed by electrolytic oil removal, gasoline or chlorinated solvent wiping, alkali + surfactant hot boiling, etc The mixed electrolysis of anode and cathode is the best way to remove oil. After wiping oil with solvent, there will be residual oil on the surface. It is better to further remove residual oil by electrolysis or alkali boiling to ensure good adhesion of corrosion resistant layer. The quality of oil removal directly affects the processing process and product quality.
After oil removal, the anticorrosive layer is made on the surface of stainless steel, which can be divided into three methods. One method is to use the adhesive engraving as the anticorrosive layer, use the computer to carve out the pattern text, stick the adhesive with the pattern on the surface of stainless steel, remove the adhesive to be removed manually, expose the metal surface, and use the adhesive not removed as the anticorrosive layer. This method is more suitable for the occasions where the processing pattern is simple or there are not many words, and the requirements are not very high. The operation is simple, there are not too many professional skills, and the processing cost is also low. However, in the case of complex patterns, many characters or high etching requirements, due to its technological limitations, the processing cost increases dramatically and it is difficult to meet the accuracy requirements.
The second method is to make the resist layer by screen printing, i.e. screen printing resist etching ink, which covers the non etching part with ink, so as to achieve the purpose of shielding the acid solution. This method is more suitable for the etching industry with low precision requirements and large batch of the same graphic processing, which has the advantages of fast processing speed, low cost, easy and neat image and text edges, and is suitable for batch processing. The disadvantage is that silk screen printing skills are required, and as far as possible there is no pinhole or color rubbing after printing. If a large number of pinholes appear, there may be color rubbing phenomenon, which needs to be reworked and reprinted. Because before printing, it is necessary to make screen plate, which is not suitable for single plate industry with small batch.
The third way is to make photoresist layer, cover the stainless steel surface with special photosensitive ink, and form anticorrosive coating on the stainless steel surface through photolithography, development, fixation and other processes. It has the advantages of high pattern precision and can achieve zero error, that is to say, it is the first choice of processing method that requires high processing precision and accurate drawing between plates. For small batch Volume industry, due to the elimination of screen plate making operations, the cost is lower than screen printing. The disadvantage is that special screen printing and plate printing equipment and higher professional skills are needed, and for the same pattern with large batch production, the production speed is significantly lower than that of screen printing, so as to increase the overall production cost.
The above is a common method of making corrosion resistant layer. One or more of them can be used according to the actual situation to achieve the purpose of twice the result with half the effort.
After the etching layer is finished, it can enter the etching process. The etching can be divided into manual wiping and etching, manual pouring and etching, shaking table etching, mechanical pouring and etching, hot pressing spraying and etching, swing spraying and etching, etc. the acid etching solution (such as aqua regia, sodium hypochlorite, hydrogen peroxide, ferric chloride, iron nitrate, etc.) is wiped or manually poured by hand The method is applied (splashed) on the surface to be etched to make the exposed metal surface dissolve and enter the solution in the form of ions, so as to achieve the purpose of etching. Its advantages are flexible processing, not limited by the site and the shape of the eroded object. The disadvantages are high labor intensity (especially in large-scale processing), serious air pollution, easy to cause human injury, low accuracy, and difficult to grasp the uniformity of etching Hold, easy to flow. Shaking table etching is the improvement of manual etching, that is, the motor is used to drag the etching groove to swing, so as to achieve the purpose of changing the liquid at the contact between the acid and the metal surface. The improvement is only to reduce the labor intensity of the personnel and the number of contact between the personnel and the acid. For example, aqua regia, hydrogen peroxide and other acid which reacts strongly with stainless steel should not use swing bed, otherwise it will be dangerous due to the temperature rise unable to control the acid boiling (explosion) splashing.
At present, mechanical sprinkling etching is mainly used in special operations. It is an ideal etching method with etching depth of 0.3-1.5mm. For example, in the process of photorefractive embossing of gilding printing, it can cooperate with the corrosion inhibition of formamidine and thiourea and mechanical sprinkling stamping to achieve deep etching of positive pattern by physics and thermodynamics, and ensure that the graphics and texts can be used in the application process with proper slope Bear enough pressure.
Spray plasma etching machine is an ideal etching method at present. Its principle is to spray the heated etching solution evenly on the stainless steel surface after being pressurized by a mechanical pump. With the help of spray pressure, the barrier layer of etching products can be removed in time, so that the etching can be carried out smoothly. The heated etching solution can ensure the normal and fast etching. Generally, the acid solution is used in the etching machine, with less air pollution The reaction temperature is easy to control and the etching surface is even and clean. However, this method can only be used in the stainless steel decoration of the sign. It can only be etched for more than 0.3mm. If it is deep, it will buckle at the side and the font will be reduced. It is ideal to spray etching on the deep mechanical etching of the deep embossing plate.
It is used to corrode the steel plate.
When using, use the machine to pour water on the exposed part of the etched steel plate.
Fast corrosion speed and good corrosion effect.
It can effectively protect the steel plate slope and side corrosion, and form a good network edge. 300 series stainless steel can achieve the decoration effect of even white surface after etching. The disadvantage is to use a professional etching machine, which requires a high level of operation skills for etchers. Generally, only plate etching can be done.
After etching, the exposed part of the metal surface is fully eroded to form a depression, and the part of the surface with the corrosion resistance layer is raised to form a decorative pattern from the surface.
The next step is to remove the corrosion resistance layer to make the whole metal surface all exposed. For the adhesive corrosion resistance layer, only the adhesive layer can be removed manually. For the pattern of screen printing, it can be based on the Organic solvent or alkaline water is used to remove the body property, and the photoresist layer can be boiled out by hot water solution of caustic soda.
After removing the corrosion resistant layer, the etching work is completed, and the rear part can be further processed according to the customer's requirements. For example, when it is generally used for label processing, the paint filling work is required after etching. The color machine of Zhuo Chuang technology uses the cathodic electrophoretic paint to protect the place where there is no paint, and then the protective film is removed. The electrophoretic color machine is suitable for the production of large quantities of single color products, or the syringe will be used to fill the paint The paint shall be filled at the place where the paint needs to be filled. After the paint is dry, the excess paint shall be removed with organic solvent, and the varnish shall be sprayed or not sprayed. You can consult Zhuocang technology of Hangzhou, Zhejiang Province for the back clear surface packaging and other coloring methods.
According to the above experience of practical operation, you must choose the right machine to make stainless steel plate. To avoid unnecessary loss of money and time caused by wrong selection.
The color stainless steel etching plate is to etch various patterns on the surface of the object by chemical methods. The 8K mirror panel is used as the bottom plate, after etching treatment, the object surface is further processed, which can be processed by various complex processes such as local harmony pattern, drawing, inlaying gold, local titanium gold, etc., so as to achieve the effect of bright and dark patterns and gorgeous colors. Etching stainless steel includes color stainless steel etching with various patterns. The colors available for selection include: titanium black (black titanium), sky blue, titanium gold, sapphire blue, coffee, tea, purple, bronze, bronze, champagne gold, rose gold, purple red, titanium white, emerald green, green, etc. It is suitable for star hotels, KTV, large shopping malls, high-level entertainment places, etc.