Packaging-equipment manufacturers continue to push the engineering envelope to add more features to their machines and run them at higher speeds. Case in point is the recently introduced SD-900 from Glue Dots International based in New Berlin, Wis.
The SD-900 is a fully automated adhesive applicator designed to quickly and cleanly apply the company's proprietary pressure-sensitive adhesives. It's suited for general packaging applications, as well as for specialized use in the pharmaceutical, nutraceutical, cosmetic, and printing industries.
The SD-900 applies pressure-sensitive adhesive at a feed rate of 300 pieces per minute.
The web-fed, inline applicator incorporates a number of sensors and stepper motors that let it run at high speeds with precise, coordinated motion control. But it all comes together thanks to a pneumatic cylinder from Numatics Inc., Novi, Mich.
When in close proximity to a product, a web-fed machine, such as a label applicator, typically uses a motor to accelerate the web and apply labels onto passing products. However, Glue Dots brand adhesives require a different sequence of operations to ensure they're applied properly.
A pneumatic cylinder generates the pressure necessary to transfer adhesive onto the passing product, then retracts to eliminate drag.
Pressure is necessary to transfer the adhesive from the web onto the passing product. Because of this, only brief contact with the product is permitted to eliminate any drag yet still facilitate transfer.
Extending and retracting the application roller onto and away from the customer's product becomes extremely important.
The Glue Dots engineers turned to a pneumatic cylinder to handle this function for the following reasons:
The pneumatic system on the SD-900 ensures adhesive placement accuracy of ±0.09 in.
Compressed air is a familiar and well-known technology, making the implementation and use of the SD-900 easier and more economical for customers.
The pneumatic system within the SD-900 allows it to have a feed rate up to 300 adhesive applications per minute with dot-placement accuracy of ñ0.09 in. Without the use of the pneumatic cylinder, the application process simply would not be possible.
The double-acting Numatics cylinder used on the SD-900 has a 0.56 in. diameter, bumpers at both ends, and a rear pivot mount. It's made of aluminum and stainless steel and is pressure rated to 250 psig.
Elizabeth Stock is the Sales and Marketing Coordinator at Glue Dots International, New Berlin, Wis. For more information on the SD-900, visit www.gluedots.com/SD-900. For more details on Numatics cylinders, visit www.numatics.com.