Expander Roll Specialists
We have over 70 years of expertise and experience
Osaka Dyeing and Weaving Machinery Co., Ltd.
OSAKA SENSHOKU MACHINERY CO.,LTD,
"The shaft is fixed, and only the rubber rotates" - a new concept born from the expander roll structure.
Osaka Dyeing and Weaving Machinery Co., Ltd. has developed a new rubber roll for use in a straight (linear) shape by applying the "built-in bearing and outer ring rotating system" of their flagship product, the expander roll. The structure is fundamentally different from that of a typical iron-core straight-wound roll. As only the rubber sleeve (outer ring) rotates, it achieves surprisingly low rotational torque. It can be used in a wide range of applications as a guide roll, touch roll, or free roll.
Three reasons to choose the outer ring rotating type (sleeve type)
1. Low torque and "driving force"
内部ベアリングにより回転抵抗を極限まで低減。多くの場合、駆動装置なしでシートの搬送力だけでスムーズに追従します。製品へのスクラッチ（擦り傷）防止にも貢献します。
2. No drive unit or construction required
Installation is complete simply by fixing the shaft. Since motors and complex bearing designs are unnecessary (*), it is extremely easy to add new test lines or replace existing lines.
*Note: Auxiliary drive may be required depending on the conditions of use.
3. Adjust the grip with surface treatment
Grip strength is optimized by polishing and grooving the sleeve surface, and it also functions highly as a pressure roll (touch roll) that prevents slippage.
Suitable for a variety of industries and harsh environments
High-performance film transport
Helical and parallel grooves are used to prevent air entrapment. Surface polishing adjusts the coefficient of friction, preventing wrinkles and slippage.
Paper processing/printing/non-woven fabric
The surface finish is less susceptible to the effects of paper dust, and low load conveyance is achieved for tension-sensitive nonwoven fabrics, preventing product stretching and breakage.
Special environment/acid chemical line [Proven track record]
It can also be used in corrosive environments such as the outlet of an acidic chemical tank. In addition to a structure in which the shaft (metal part) does not rotate, chemical-resistant rubber (fluorine, etc.) is selected, providing high durability and drainage performance.
[Ships in as little as 3-5 days] Urgent/Test Use Immediate Delivery Service
"The line stopped due to a sudden breakage." "I need a φ100mm straight roll for testing right now."
In response to such requests from the field, we are able to provide ultra-short delivery times by utilizing our stock sleeves.
Size: Outer diameter φ100 mm only
Material: EPDM
Hardness: 50°~60°
Delivery time: If the above specifications are met (including materials and hardness), the product will be shipped in as little as 3 to 5 days.
Basic specifications and manufacturing range
・Structure: Bobbin structure + rubber sleeve coating (rotating outer ring, fixed shaft)
Surface processing: Surface polishing, groove cutting (crown processing is not possible)
・Compatible rubber materials: EPDM, NBR, urethane, silicone, etc. (when custom made)
*Due to the sleeve-type structure of this product, the rotational runout accuracy that can be achieved varies depending on the roll face length (length). For short lengths, adjustment is possible to around 0.05 mm, but the longer the length, the more likely runout occurs. We will respond to your inquiries regarding detailed accuracy based on the size you require.
Frequently Asked Questions (FAQ)
Q1. What size range (outer diameter and face length) can you manufacture?
A. Currently, we can manufacture rubber outer diameters from φ50mm to φ125mm, with a maximum face length of 2,500mm. We plan to expand our range of sizes in the future. We may be able to handle sizes other than those listed above, so please feel free to contact us.
Q2. What is the line speed that can be handled?
A. Surface speed: Maximum 350m/min. Expander roll structure is used, achieving smooth follow-up (co-rotation) even at high speeds.
Q3. Can the rubber material be changed?
A. Yes, it can be changed. In addition to the standard stock EPDM, we can manufacture products using various materials such as NBR, urethane, and silicone depending on the application. Also, since this product has a replaceable sleeve, you can manufacture only the sleeve of the rubber material you want to use and use it by replacing it. This is also ideal for when you want to try out different materials for testing.
Q4. Can the surface be finished (polished)?
A. Yes, it is possible if the standard specifications of this product (OS outer ring rotating type) are met. By polishing the surface, the gripping force can be fine-tuned, and the friction coefficient can be optimized for each application.
[※Please note] Surface polishing is only available for the "OS outer ring rotating type" introduced on this page. Please note that surface polishing cannot be performed on products with optional "grooving" or general "axial rotating type standard straight rolls" due to their structure.
Q5. Is it possible to replace an existing roll (rotating shaft)?
A. Yes, it is possible. However, since this product has a "fixed shaft," you may need to remove the bearing (bearing unit) and use a special bearing to fix the shaft to the frame, or you may need to make some simple modifications.
Q6. テフロンチューブの被覆は可能ですか？
A. Yes, it is possible. If non-stickiness or chemical resistance is required, we can process the rubber sleeve into a Teflon tube (heat shrink tube).
We can also make individual proposals tailored to your specifications. If you have any questions or specific inquiries other than those listed above, please feel free to contact us.