大阪染織機械株式会社 Company Overview

With the acceleration of production lines, we frequently receive inquiries from the field regarding the issue of "the end face cover of the expander roll falling off." In fact, this problem occurs primarily during "high-speed operation" at line speeds of 600 m/min or more. The harsh stress on the end face caused by centrifugal force and continuous load is the main reason for significant downtime (production loss). This article explains the importance of "custom design" to solve these challenges unique to high-speed lines. Our expander rolls (high-speed version) adopt a unique structure that prevents the cover from falling off even in harsh environments, achieving an overwhelming stable operation with an effective trouble occurrence rate of "virtually zero." To those responsible for equipment who are struggling with "wanting to increase production speed but facing equipment bottlenecks" or "wanting to eliminate frequent maintenance and line troubles," we propose the optimal 'expander roll introduction plan' tailored to your operating conditions (speed, target materials, tension, etc.). For specific causes of trouble and our solutions, please refer to the main article linked here.

A severe challenge frequently occurring in converting operations is "the expander roll slips even though the tension is sufficient." The root cause lies in the confusion between the "tangential force" that rotates the web and the "starting torque" that hinders rotation. Simply calculating tension will not resolve the slip. For reliable follow-up rotation, it is essential to achieve both "reduction of starting torque to the limit" and "optimal grip force" that holds the web. In this article, we present our company's "two strongest approaches" to overcome this challenge. 1. [Ultra-low torque assembly × non-polished crepe material]: Incorporating crepe processed rubber with strong grip without grinding, achieving ultra-low torque rotation. 2. [Japan's only precision grinding in a curved state]: Grinding while maintaining the original curved shape to eliminate eccentricity. This creates optimal grip force and uniform surface pressure. We propose specifications that perfectly match the site environment, from low tension to over 2000 kgf high tension. Companies considering fundamental solutions through replacement of existing equipment or new installations, rather than temporary measures, are encouraged to read the full article.

An expander roll for smoothing wrinkles in film and paper. Many lines are equipped with a "drive motor" to maintain reliable rotation, but the accumulation of electricity costs, regular replacement of peripheral components, and the "invisible labor" involved in daily inspections can significantly contribute to the running costs in production environments. In this article, we propose replacing it with our "low torque expander roll," which fundamentally reduces these drive costs. Our rolls rotate smoothly solely based on the tension of the sheet due to their overwhelmingly low torque design. By eliminating motor drive, electricity costs and CO2 emissions in the relevant areas become zero, and maintenance labor for drive components can be completely eliminated. We offer fully customized products tailored to your company's environment, from technical verification such as "Can we change to a drive-free setup while keeping our existing line configuration?" to cost reduction simulations resulting from the introduction. For specific solutions aimed at reducing maintenance costs of existing equipment and promoting energy savings, please refer to the main article.