What is the impact of accuracy on the flat plate direct injection machine
The printing accuracy, equipment stability, ease of operation, ease of maintenance, adaptability, cost of use, etc. of the flatbed direct-injection machine equipment. When it comes to printing accuracy, people always think of the printing resolution, 1440dpi or 720dpi. In fact, this is only part of the printing accuracy. The printing accuracy will involve many aspects, such as the resolution of the print head and the mechanical accuracy (stepping). Accuracy, the mechanical accuracy of the shaft roller), the matching degree of the ink and the nozzle, etc. Print head accuracy At present, the print heads on the market include piezoelectric print heads, thermal foam print heads, photo print print heads, and industrial print heads. Among them, the most commonly used print heads for printing are piezoelectric print print heads and industrial print heads. Epson's fourth-generation, fifth-generation, and sixth-generation heads are the main products. The fifth-generation head is the mainstream product. The highest resolution is 1440dpi, which supports 720dpi and 540dpi printing modes. This is also the most used print head for printers. In addition, some manufacturers choose industrial print heads, such as American spetra, Japan Ricoh, Japan kyocera, etc. The general resolution of industrial heads is about 720dpi. Compared with epson nozzles, industrial heads are expensive, but have long service life, low resolution, and large ink droplets. From the perspective of textile printing, due to the thicker fabric fibers, the resolution above 720dpi is visually effective. It is difficult to distinguish. From the nozzle point of view, since the nozzle technology is monopolized by a few manufacturers, printing machine manufacturers purchase from these manufacturers, so in fact, if you choose the machine printing accuracy, the starting point for the nozzle is basically the same. 'Mechanical precision' The influence of machinery on printing is actually far greater than the resolution of the print head, because mechanical processing has always been a shortcoming of the domestic processing industry. Generally, the format of the direct injection machine is 1600~2200mm, and the length of the shaft roller is generally 2200~2800mm. If the diameter error of a company’s product is 0.1mm, then during the printing process, the nozzle may cross at the connecting part of the two inkjets, and there may be a 0.3mm white line on the other side. This is a common problem for any customer. unacceptable. By analogy, if there is a problem with the concentricity and the linearity of the straight digital printing machine, the consequences are similar. Insufficient assembly accuracy is also the main reason that affects the accuracy of printing machinery. For example, the parallelism is not enough, causing the fabric to run off, the bearing quality is not good, and the wear is inconsistent, which will also affect the parallelism. Finally, servo motors and control systems, except for some small factories, generally use international brands of products in the industry, which has little effect on mechanical accuracy. Ink aspect Generally people think that ink may affect color saturation, color fastness, and amount of coloring, but in fact, ink also has a great influence on printing accuracy. Obviously, if the ink fluency is not good and there are many mechanical impurities, there may be broken lines, plugging, and small white lines during the printing process, which will affect the accuracy of printing. If the ink viscosity, surface tension and other parameters have problems, it may cause oblique spray. Then there is the ink storage stability, batch-to-batch uniformity, etc., which are the main causes of print quality problems. Printing classification Direct-injection printing can be divided into acid direct-injection machine (silk, nylon), reactive direct-injection machine (cotton, linen, silk), sublimation printing (polyester), paint direct-injection machine ( Cut pieces and garments of almost all materials). According to the shape of the fabric, it can be divided into two types: continuous direct-injection printer and garment piece direct-injection printer. According to the characteristics of different fabric elasticity and different fragility, direct-injection printing and non-conducting-band direct-injection printing have appeared. Different types of flat-panel direct-injection equipment are suitable for different fabrics. Currently, there is no real 'machine' that can print all components and all forms of fabrics. There are certain differences in the degree of application of different equipment, and equipment vendors need to provide professional technical training. And technical support. To sum up, if we want to get a good print quality and a good print accuracy, we can't just focus on the resolution of the nozzle. The mechanical accuracy and the quality of the optional ink are also very important.