Although the screen printing branch and technology of 2004.1 have not been widely used in the glass decoration industry, some of the following applications have been under study.
Some companies intend to use digital printing proofs in different applications and even in short runs, which is quite feasible in piezoelectric inkjet printing technology and in eye-catching UV piezoelectric printing. These companies are willing to get the "inkjet printing of glass inks" opportunity. The current problem is that the high abrasion strength of the pigment in the glass ink causes the piezoelectric head to be damaged quickly, and the cost is a major problem currently considered.
The main problem at present is the light and chemical resistance of the glass, especially in the car glass. Research on automotive and architectural glass, as well as the lamination of printed plastic films between two layers of glass, with or without heating, is underway.
The vending machine, mirror V advertising market also includes front glass for drying boxes, microwave ovens, and other glass household products. The market is much less limited than the bottle, car, and construction markets. It is important to emphasize here that digital printing technology is being considered for the proofing process. Perhaps in the near future, the platform piezoelectric UV inkjet printer will prove that it is very suitable, with many advantages such as low price, high speed and safe production.
Other systems in the glass decorating process, of course, include many other processes in the glass decorating process.
The most traditional is label making, which can be used in a variety of processes, including offset, gravure, flexo, screen printing, hot stamping, etc. It can also be combined with several different processes called enamel or other glass containers. The label is adhered to the bottle by an adhesive using an adhesive. Another common technique is to first print the image on a PVC film and then heat it to the bottle.
There is also a sanding technique that produces a matte effect by a certain thickness of glass ink or by acid corrosion. These processes are typically performed by bottle printers using specialized techniques or in combination with other techniques.
The last one is the widely used vinyl sticker printing process, which is generally used in the construction field. It can produce frosting, corrosion or other special beads. If necessary, the sticker can be torn off without damaging the glass. Will not leave any traces.
Transparent PG, PVGi spleen â–¡ Zhao Zhishun through the mold thermal injection molding, and then carry out subsequent processing, complete a signage pattern color and its protection of a decorative sign. Since the PC material has good transparency, wear resistance and corrosion resistance, the grade of the product is improved. Stomach material, another type of decorative sign that completes the color of the sign and its protection by hot-molding or cutting the formed sheet through the mold. The transparency and wear resistance of PVC signs are slightly worse than PC signs, but the processability is slightly stronger than that of PC signs. Transparent PVC and PVC signs are generally oval or round shape design, suitable for product pattern signs, words. The card is basically not produced by this process. The color of the product is mainly one color, and two colors are also used.
Some of the flat signs are directly processed by sheet metal, and the product patterns and texts are often screen printed or engraved and finished.
Molding Because polycarbonate (PC), plexiglass (PVC) injection molding characteristics are more complex than ABS engineering plastics, the shrinkage ratio of the product and the effect of front transparency on the shape of the product should be considered in the mold processing. In particular, the smoothness and flatness of the mold processing have a great influence on the injection molding of the product. The choice of mold intersection is also very important. If the intersection is not properly selected, it will cause shrinkage and chipping defects of the product, which will affect the appearance of the product. When possible, the gate is best chosen to be non-intuitive. Therefore, the mold usually uses a latent gate. (2) Select reliable product positioning and make tooling; (3) Mix and print ink, and dry in oven for 10 minutes. The oven temperature should be controlled at 100 to be self-drying. In order to ensure the color printing of the product is thick, it is generally printed twice.
The product of vacuum birch protection vacuum aluminum plating should be applied to the product. In order to obtain the plating surface we need, reasonable protection should be adopted for the non-plated surface. At present, the paper is usually used to protect the non-plated surface, and it must be careful and accurate when pasting.
Polycarbonate and plexiglass must be baked in an oven before injection molding. The time and temperature should be optimized according to the mold condition and material properties. The preheated material can maintain the transparency of the product after injection molding, prevent the pellets from rapidly heating up, and the product transparency decreases, and the surface of the product turns yellow. Since the shape and pattern of the product are concave, any particles and defects appear in the depressed portion, and the defects are enlarged when the front side is seen. Therefore, in the injection molding, the cavity and the like of the mold should be closely observed. In case of problems, deal with them in a timely manner.
After the product is injection molded, the gate should be carefully trimmed to avoid defects. In order to prevent the warpage of the product, the best solution should be formulated for the ejection of the product after injection molding and the cooling of the product. After the product is trimmed, it is necessary to adopt a suitable packaging method to avoid friction between the products.
Background color: After injection molding of Sn PC and PVC signs, the products are generally colorless and transparent. The color of the product should be processed according to the requirements of the product pattern. Most of the current color substrates are plastic inks, which are processed by screen printing. The steps are as follows: (1) processing the screen printing metal color according to the pattern of the product, and processing the transparent PC, PVC label pattern metal color can be hot stamping film reverse hot forming, vacuum aluminum forming. The hot stamping film can be formed on the flat surface only, and the vacuum aluminum plating can be carried out in a flat surface and a concave surface. Since the transparent PC and PVC sign patterns have a three-dimensional effect, the metal color processing is formed by vacuum aluminum plating. The steps of vacuum aluminizing are: (1) spraying the primer material; (2) completing the aluminum plating in the vacuum coating equipment; (3) inspecting the product; and (4) covering the protective layer (usually using a plastic dark paint).
The metal color is processed by the hot stamping method, and the background color should be performed after the hot stamping of the metallic color. To process the metallic color in the cavity by vacuum aluminum forming, the color of the pattern to be displayed should be processed first.
Transparent PC and PVC signs processed by engraving are generally engraved and then processed in color. When printing directly on the board, pay attention to the order of color printing to avoid ochre in multi-color printing.
After finishing the product finishing and adhesive metal color processing and protection, the product should be cleaned, the non-plated protective paper should be removed and the transparent surface cleaned. After the treatment is completed, the product should be inspected for overall quality. The qualified products should be attached with double-sided tape as required, and then the product should be packaged.
Some of the PC and PVC signage products can be mounted on plastic backplanes or other plastic parts. If the product is to be designed to be inlaid, the installation dimensions of the product must be accurate.
Baseball Cap,Custom Baseball Caps,Snapback Baseball Cap,Embroidered Baseball Caps
Dongyang City Feilong Cap Co., Ltd. , https://www.zjflcaps.com