大阪染織機械株式会社 List of News Articles

In the September issue of the web handling magazine "Convert Tech," our technical column titled "Development of the Outer Wheel Rotating OS Rubber Straight Roll and Prospects for Next-Generation Web Handling" has been published. This product is a straight-type guide roll that directly applies our company's "extreme low torque technology" used in our expander rolls. By intentionally not including a wrinkle removal function and focusing on being the "ultimate low torque guide," it demonstrates tremendous effectiveness in tension control and slip prevention during the transport of ultra-thin films and delicate substrates. In the column, we provide a detailed explanation of how this product can contribute to the demanding production lines of the next generation. We encourage you to read it. If your company is struggling with "preventing slip of ultra-thin substrates" or "wanting to stabilize tension," please feel free to contact us directly regarding the introduction of this product or testing it with our demonstration machines. We will propose the most suitable equipment improvement plan for your line.

Are you facing issues in the manufacturing and processing lines of films, paper, or non-woven fabrics, such as "unable to completely remove wrinkles from the current roll" or "not knowing whether a flat or curved type is best for our line"? Osaka Textile Machinery Co., Ltd., a pioneer in expander rolls, has launched a 'Technical Consultation and Equipment Diagnosis' service where specialized technicians with over 70 years of experience visit your manufacturing site directly. In this service, we will directly assess the tension conditions and equipment environment on-site to identify the complex causes of wrinkles and shrinkage from a professional perspective. We will compare and diagnose the mechanisms and characteristics of flat expander rolls and curved expander rolls based on objective facts. Not only will we provide technical advice, but we will also propose fundamental solutions to your challenges using our "curved expander rolls" and present a product introduction plan based on solid technical grounds. To deliver high-quality specialized diagnosis and proposals, this service operates on a [preliminary individual quotation basis]. (Note: Proposals and contracts can also be made through trading companies or retailers with whom you regularly do business.)

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.

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.

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.

The "curved shaft," which is the heart of the expander roll. While the one-time bending process used by typical large machines is efficient, it can accumulate "invisible twists" within the metal, potentially leading to breakage issues during long-term use. At Osaka Textile Machinery, we deliberately choose the inefficient "manual" bending process to avoid stopping our customers' lines. By carefully bending the metal while sensing its resistance, we minimize damage and drastically reduce breakage problems. We achieve an astonishing precision of ±0.5mm based on our unique standard, "arc height." Do you have concerns such as "the expander roll wears out quickly" or "there's variation in precision"? Although they may look the same, our "philosophy of craftsmanship" shows differences after 5 or 10 years. We explain this in detail in the article linked below. Please check out the full article from the related link!

Various rolls that are essential in the manufacturing line. To improve non-stick properties and sliding characteristics, it is common to cover the surface with Teflon tubes (fluororesin heat shrink tubes). However, when considering the coating process for rolls, there is a "pitfall" that is often overlooked. Are you thinking, "If I finish the base metal roll with high precision, it will remain a high-precision roll after coating"? In reality, no matter how precise the metal roll is, the physical forces applied during the shrinkage of the tube will inevitably cause changes in "runout precision" and "rotational torque." Even if you invest in achieving a perfect score of precision in the base material, if the precision is compromised after processing, it will not perform as intended. So, how can we prevent line issues and produce high-precision rolls as desired? Based on our extensive experience and unique data, we design with foresight regarding changes after coating, and our technology supports your line with assured quality. The details are explained in the article below. Please check the main article through the related link!

"The expander roll is heavy to turn and scratches the film..." The cause may lie in the surface's "rubber hardness." In fact, just a slight change of 10° in hardness can result in a difference of about 1.6 times in the starting torque (the weight at which it begins to turn) of the expander roll. This article presents actual measurement data on torque changes due to rubber hardness! Furthermore, we explain the background of our "unique clearance adjustment technology," which achieves consistently stable rotation regardless of the inherent variability of rubber and environmental changes. If you are struggling with strict torque management, please check out the full article through the related link!

"Even though we introduced an expander roll, the wrinkles won't come out..." The cause may lie in the setting of the "contact angle" used to wrap the sheet. In this article, we will provide a list of the correct considerations for the contact angle to maximize wrinkle removal effects, along with recommended values (guidelines) for different materials such as film, paper, and fibers. Additionally, we will explain common pitfalls, such as the tendency for wrinkles to form if wrapped too tightly, as well as how to choose the best roll for specialized line designs. To prevent loss of expensive base materials and stabilize quality, please refer to the main article through the related links for technical know-how!

"Since it will be driven by a motor anyway, it doesn't matter if the rotation of the expander roll itself is somewhat heavy"… Have you ever thought that way when selecting a large-diameter expander roll? In fact, that assumption may be causing unnecessary electricity costs (invisible costs) over a long period. This time, we measured and compared the "starting torque (the weight at the moment it starts moving)" of large-diameter rolls, and it was demonstrated that our custom-made products start rotating with a force that is "2.6 kg" lighter compared to typical products. This overwhelming lightness dramatically reduces the load on the motor, achieving energy savings and extending the lifespan of the equipment. Why is there such a difference even with the same specifications? For details on this "reliable solution" that fundamentally reduces running costs on-site, please see the main article from the related link!

"Has the grip of your expander roll decreased? Are you burdened by the cost of replacing expensive rubber sleeves?" Do you have such concerns on-site? In fact, before replacing with an expensive new one, it might be possible to restore it through "polishing"! Our company is the only one in Japan that offers rubber surface polishing services for expander rolls (curved rolls). By smoothing out the worn surface, we can restore grip comparable to new and achieve uniform dimensions. We also welcome expander rolls from other manufacturers and overseas. For details on this groundbreaking service that reduces replacement frequency while simultaneously improving quality and cutting costs, please see the full article through the related link!

Does Osaka's low-torque expander roll really turn with a light force? To challenge the limits, we tested it using "hand-sewing thread" and "mini 4WD"! With a regular roll, it would be too heavy to move at all. The thread would break, or the mini 4WD would just spin in place. But with our low-torque specification...? Check out the shocking results in the YouTube video! This "smoothness" is proof of the ultimate technology that prevents wrinkles in film and paper. URL: https://youtube.com/shorts/nzJNvBzB4fc

"Cost Reduction in Manufacturing Sites" Are you choosing based solely on the low unit price of parts? Even if the main body of a typical driven expander roll is inexpensive, the "hidden costs" such as motors, control panels, electrical installation fees, and the "effort of design and adjustment" can weigh heavily later on. However, our "low-torque expander roll" requires no drive equipment at all! Even if the unit price seems high, it can be installed with just a "plug-and-play" approach, making the total introduction cost overwhelmingly low. Furthermore, since there are no drive components, the risk of failure after delivery and electricity costs are zero. To answer the question, "Does it really turn just with tension?" we are also publishing empirical data that proves its overwhelming lightness. What is the real truth about "money and effort" that cannot be seen by price alone? Please access the full article through the related links to learn more!

Osaka Dyeing and Weaving Machinery Co., Ltd. will exhibit the "OS Expander Roll" at the 33rd Skills Grand Prix concurrent event "Osaka's Manufacturing Interesting Future Exhibition" (hosted by Osaka City), which will be held from February 27. Our expander roll is an essential industrial roll for manufacturing that reliably eliminates "wrinkles" occurring in the production processes of films, paper, non-woven fabrics, and metal foils. Since it is usually integrated into BtoB production lines, there are very few opportunities for the general public to see it. However, at the "Osaka-Kansai Expo" held in September, its niche yet important role attracted a lot of interest and received a very positive response. This will be the much-anticipated second public exhibition following that event. 【Technology of "Osaka Dyeing and Weaving Machinery" Supporting Japan's Manufacturing】 We are a pioneering company that was the first in Japan to domestically produce expander rolls. Through our unique bending technology and precise processing techniques developed over many years, we have solved various "wrinkle" challenges for our customers.