First, the issue of printing white.
Printing whiteness is one of the most common and challenging quality problems in the production of corrugated cardboard boxes. It often appears as a light spot or uneven color on the printed surface, which can significantly affect the overall appearance of the product. The main causes include poor ink absorption by the paper, dirty printing plates, and the presence of dust or debris on the cardboard itself. Traditionally, these issues are addressed by manually replacing the box or increasing the frequency of manual cleaning. While these methods may offer some improvement, they are not very effective in the long run and can reduce production efficiency. Additionally, manual wiping consumes water, electricity, and labor, leading to unnecessary waste. After extensive observation and analysis, the author concluded that the key to solving the problem of printing whiteness lies in dust removal during equipment installation, maintenance, and management. The primary source of dust comes from the single-knife cutting process. Two years ago, an electrostatic air suction and dust collection system was installed after the computer cross cutter in the cardboard production line and at the paper feeding section of the printing machine. A blower was placed before the cutter to blow away any debris hidden in the grooves when the knife splits the paper. Then, the electrostatic dust collection device was used to suck up the dust at the paper receiving rack behind the cross cutter. At the gap between the paper feed rubber ring and the roller, an electrostatic system was used to remove dust from the cardboard, ensuring a clean and dust-free printing surface. As a result, when the cardboard enters the printing cylinder, the ink is applied evenly and without obstruction. This improvement significantly enhanced the printing quality and effectively eliminated the issue of printing whiteness caused by dust.2. Handling of Overprinting
With the growing emphasis on artistic and three-dimensional design in product packaging, consumers now expect a more refined and visually appealing outer package. To achieve this, multi-color overprinting is commonly used in packaging printing. However, during the overprinting process, misalignment between colors is a frequent issue. This can cause the final printed image to deviate from the original design, sometimes even completely distorting the intended visual effect and damaging the product's image. To address this challenge, the author's company conducted in-depth research and made several improvements to the existing equipment. They calculated the response speed of the electrical control system relative to mechanical tolerances and implemented relevant maintenance measures. These steps helped improve the accuracy and consistency of the overprinting process. 1. Improving the Accuracy of Printing Cylinder Phase Positioning The phase positioning of the printing cylinder is controlled by the cooperation of the encoder and the counter. If the counter's precision is too low, the position of the encoder becomes inaccurate, leading to shifts during printing. Initially, the counter had a resolution of 3k, but it often had a ±1mm error during positioning. After discussions with a Taiwanese electronics company, a 5k counter was developed, reducing the positioning error to ±0.4mm. 2. Timed Lubrication and Testing of Transmission Machinery During the paper feeding process, if the transmission machinery does not operate smoothly, the position of the cardboard can shift each time, causing misalignment in printing and sleeve positioning. Therefore, proper maintenance and inspection of the equipment are crucial. A daily operation checklist was created, including lubrication tasks. Limits for wear on the paper feed wheel and paper feed ring were also established. If they exceeded these limits, they had to be repaired, recoated, or replaced to prevent shifting and skewing of the cardboard during feeding. 3. Using Suction to Feed Paper Traditional printing machines use an upper printing method with only a paper feed wheel to convey the cardboard. In contrast, newer models utilize advanced technology with lower printing and upper suction systems. The suction paper feed uses wind force to attract the cardboard onto the conveying wheel. This ensures even pressure, prevents slanting, and flattens curved boards, resulting in a more uniform and flat ink application during printing.Third, the treatment of poor printing ink.
When ink quality is poor, it can be due to factors such as paper quality, offset issues, or technical problems with the ink rollers on the machine. Anilox rollers are commonly used, and in high-standard carton printing, anilox rollers with more than 250 lpi are typically employed. However, the mesh holes on these rollers are prone to clogging with ink residue, leading to uneven ink distribution and insufficient ink volume. This results in inconsistent ink coverage, dark and light areas, and other undesirable effects. Traditionally, the method used to clean ink rollers involved washing them with water or detergent, but this approach was not very effective. Even after cleaning, the ink roller would lose its performance within a month, and the results were not as good as before. Through long-term exploration and testing, the author's company found that the following methods could effectively address the issue of poor ink quality: 1. Install a filter in the ink tank to prevent ink particles from transferring to the ink roller. 2. Periodically (every two weeks) use an anilox roller deep cleaning agent for thorough cleaning. 3. Clean the ink roller with dripping water every day after work, and inspect the mesh using a 60x to 100x magnifying glass to ensure there is no residual ink. Any local residue should be wiped off immediately with a deep cleaning agent. These improvements have led to better ink performance, more consistent printing, and higher-quality finished products.Welcome to our company's product introduction of curtains pole rings. We are confident that this product will meet your needs and exceed your expectations.
1.Product Overview:
Our curtains pole rings are designed to provide a sleek and modern look to your window treatment.Made of high-quality materials, these rings are durable and long-lasting.The design is simple yet elegant, making them a perfect fit for any home decor.
2.Material:
The rings are made of steel, ensuring strength and stability.The surface treatment ensures rust resistance, prolonging the lifespan of the product.
3.Size and Fit:
The rings come in various sizes to accommodate different sizes of curtains and poles.They are easy to install and fit snugly onto the pole, ensuring a secure fit.
4.Color Options:
We offer a wide range of colors to choose from, including chrome, nickel, and black. These colors match various home decor themes, making it easy to find a style that suits your taste.
5.Customer Service:
Our company strives to provide exceptional customer service. We offer free samples for you to try before you buy, ensuring a perfect fit for your needs. We also offer quick and efficient customer support, answering any questions or concerns you may have.
6.Warranty:
We offer a one-year warranty on all our products, ensuring quality and satisfaction. If you experience any issues with the product during this time, we will be happy to assist you.
In conclusion, our curtains pole rings are designed to meet the needs of modern homeowners. Made of high-quality materials, they offer durability and style that will enhance the look of your home. We are confident that you will be pleased with our product and our customer service. Thank you for considering our curtains pole rings, we look forward to serving you.
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HANGZHOU AG MACHINERY CO.,LTD , https://www.famourdecor.com