Intech Power-Core Thermoplastics Engineering Blog

Polymer-Steel Hybrids For Heavy-Duty Rollers For Rack Feeders

Posted by Alexander Bartosch on Mar 14, 2013 12:36:00 PM

Metal or plastic? In many load transmission applications, the choice will be clear-cut based on loads, lifecycle expectations and environmental conditions. There is, however, a third choice that involves both metal and plastic. Hybrid components that use a structural metal hub with a polymer load surface can offer the best of both worlds in load transmission applications. A good example can be found on a recent feeder rack application that uses a set of rollers made by casting our Power-Core™ material over a steel hub. The rollers, which measure between 250 and 500 mm across, had to withstand high static and dynamic loads. At the same time, they also had to do operate smoothly, in part to minimize frictional heating and in part to minimize noise.

Intech Highload Roller - Polymer CasterEarly in the project, it became clear that a hybrid solution would be the best way to meet all the application requirements. The steel hub provides the needed structural strength, while the Power-Core bearing surfaces reduce wear, frictional heating and noise in ways that all-steel rollers could not.

The right plastic. Power-Core isn’t the only polymer that can be used in applications like this one, but it emerged as the best one for a couple of reasons:

To learn more about Power-Core’s use in hybrid rollers, cam followers and other motion components, download our white paper “Enhancing Motion Systems With Plastics.”

 

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Tags: plastic rollers, Heavy Duty Rollers, load-bearing capacity, Rack Feeder Rollers, Rack Feeder Casters

Power-Core gear segment and pinion in high-speed card feeder

Posted by Simon Barrell on May 4, 2010 4:54:00 PM

A high frequency reciprocating gear and pinion being used in a feeder to insert postcards into magazines was suffering frequent breakdowns. Sealing the gearbox to permit lubrication that would prevent wear was not an option, and so Intech was approached to design a non-lubricated solution that could accommodate shock loads 5 to 10 times higher than the running torque of the application.

Intech Power-Core™ gears exhibit a high load sharing factor, an important quality when handling e-stops or shock loads. The load sharing factor, a measure of multiplying the load-bearing capacity of an individual tooth, is optimized for each application. Because the key way is cut into the metal hub and not the plastic, Power-Core eliminates the weak spot inherent in conventional plastic gears.

The metal hub absorbs all key way stresses, transferring maximum torque to the composite gear teeth. The teeth are made of a lightweight plastic composite, weighing just 0.037 pounds per cubic inch.



Intech Power-Core Segment Gear Pinion
A non-lubricated plastic pinion replaced a metal gear, eliminating breakdowns in a high-speed card feeder.

 

 

 

 

 

 

 

 

 

 

Torque of Power-Core gear approximates that of cast iron, but without the brittleness, weight, lubrication, and teeth breakage. As a result, Power-Core gears can reach higher speeds, increasing the throughput of your equipment. We can precisely calculate torque capacity, allowing Power-Core gears to replace metal gears in many applications.

Power-Core gears can operate without lubrication at pitch line speeds up to 15 feet per second. When a special friction-reducing coating is added, you can double gear speed to 30 feet per second.

Tags: Power-Core gears, lubrication-free, shock load, non-lubricated, plastic gears, friction-reducing coating, load-bearing capacity, card feeder, composite gear teeth, gear speed, metal gears, plastic pinion, running torque