Is your sheet-fed die-cutting machine in place?
The accuracy of certain components in a sheet-fed automatic die-cutting machine can significantly impact the quality of the final product, especially when it comes to packaging. For printing companies that rely on these machines daily, it's essential to perform regular inspections on key parts to prevent unexpected failures during production, which could lead to costly damage or even serious accidents. Pre-Calibration Accuracy Adjustment The front gauge is one of the most critical components that ensure accurate positioning during the cutting process. However, many operators tend to rely solely on the pre-regulation system, which isn't always effective. While this system helps prevent misalignment and paper slippage, adjusting the front gauge for optimal precision requires more than just system settings. The probe diameter should be fine-tuned from around 1mm down to about 0.1mm, but simply adjusting the alarm settings won’t achieve the desired results. Instead, the calibration should take into account factors like the platen roller, paper feeding time, and side gauge tension to ensure maximum accuracy. Pinch Detection Pinch detection plays a vital role in the safe operation of a sheet-fed die-cutting machine. Some operators may disable this feature, which is extremely risky. If the pinch detection fails and the paper-out detection is turned off, a paper jam in the nip area can cause multiple layers of paper to stack up instantly, leading to severe mechanical failure. This not only damages the equipment but also creates dangerous situations that are difficult to resolve. It’s crucial to keep all safety systems active at all times. Regular Lubrication Changes Every sheet-fed automatic die-cutting machine comes with a detailed lubrication schedule in its factory documentation. These schedules specify the types of lubricants required for each part, as well as the frequency of replacement. While most companies follow the recommended brands and models, they often neglect the importance of timely oil changes. Some managers may see that the oil still looks clean and decide to delay the replacement, thinking it’s unnecessary. However, this is a common misconception. Over time, the oil loses its ability to form an effective lubricating film, leading to increased friction and wear between moving parts. To avoid this, lubricants should be changed strictly according to the manufacturer's recommendations, both based on visual inspection and the oil’s condition after settling. Regular Maintenance of the Tooth Row The tooth row is another critical component that requires regular maintenance. Common issues include: (1) Broken or aged gap return springs. If the spring is damaged, the tooth row may not position or press the paper correctly, resulting in lower yield. Operators should inspect this part regularly and replace any faulty components to maintain consistent performance. (2) Insufficient occlusal force. When cutting coated packaging materials, some operators notice irregular die-cutting deviations. This is often due to weak biting force, as the smooth surface of coated paper reduces friction. If the teeth don’t grip the material properly, it can slip during cutting, causing misalignment. In such cases, adjusting the tooth position or replacing worn teeth can help restore accuracy. If die-cutting deviation is detected during production, the machine must be stopped immediately. Addressing the issue promptly can prevent further damage and ensure product quality remains consistent. This article is reproduced from the official WeChat account of "Printing Technology" (Printech1957), authorized by the company. Copyright is reserved, and any unauthorized reproduction will be investigated. Plastic Stick,Plastic Stick Cotton Buds,Customized Color Cotton Buds,Double Head Plastic Stick COTTONWHISPER (TAIZHOU) DAILY PRODUCTS CO.,LTD , https://www.cottonwhipershop.com