Is your sheet-fed die-cutting machine in place?
The accuracy of certain components in a sheet-fed automatic die-cutting machine directly impacts the quality of the final product, which is often used as a package. For printing companies, it's essential to regularly inspect key parts of the machine during daily operations. This helps prevent unexpected breakdowns and potential severe consequences that could disrupt production. Pre-Calibration Accuracy Adjustment The front gauge’s accuracy is crucial for ensuring precise positioning before cutting. However, many operators rely solely on the pre-calibration system, which isn't always effective. While this system can help avoid misalignment due to paper not being properly fed, adjusting the front gauge's precision requires more than just system settings. The probe diameter should be adjusted from about 1mm to 0.1mm, but simply relying on the alarm function won’t guarantee accuracy. To achieve optimal performance, factors like platen roller pressure, paper feed timing, and side gauge tension must all be considered during calibration. Pinch Detection Pinch detection is a critical safety feature in sheet-fed die-cutting machines. Some operators may disable it, which is extremely risky. If pinch detection is off and a paper jam occurs, multiple layers can stack up instantly, leading to serious accidents. These incidents can cause significant damage to the equipment and are often difficult to resolve, resulting in costly downtime and repairs. Regular Lubricant Replacement Each sheet-fed automatic die-cutting machine comes with a detailed lubrication schedule in its factory documentation. It specifies the type, model, and replacement cycle of the lubricants required for each part. While most companies follow the brand and model recommendations, they often neglect the timely replacement of lubricants. Some managers might skip the replacement if the oil still looks clean, thinking it's unnecessary. However, this is a common misconception. Lubricants are designed to create an oil film between moving parts, reducing friction and wear. Over time, the oil degrades, and the oil film weakens, leading to direct metal-to-metal contact. This accelerates wear and tear on critical components. Therefore, it's important to replace the lubricant according to the manufacturer's schedule. Regular checks should be based on both visual inspection and oil analysis to ensure optimal performance. Regular Maintenance of the Tooth Row Daily use can lead to issues in the tooth row, such as broken springs or insufficient bite force. When the gap return spring breaks or ages, the tooth row may not position the paper correctly, leading to lower yield and increased waste. Operators should inspect these parts regularly and replace them when necessary to maintain smooth production. Another common issue is insufficient occlusal force. When cutting coated packaging materials, improper feeding can cause die-cutting deviations. This often happens because the smooth surface of the coating reduces friction between the paper and the teeth. If the bite force is too low, the material may slip during cutting, causing inaccuracies. In such cases, the machine should be stopped immediately, and adjustments or replacements should be made to restore proper function. This article was originally published in the official WeChat account of "Printing Technology" (Printech1957), with permission from the company. All rights reserved. Unauthorized reproduction is prohibited. Square Cotton Pads,Cotton Square Pads,Facial Cotton Pads,Cotton Squares COTTONWHISPER (TAIZHOU) DAILY PRODUCTS CO.,LTD , https://www.cottonwhipershop.com