The Benefits of PU Timing Belts in Different Sectors

Plastic-molded belts have various benefits over all-metal belts. PU Timing Belts are particularly well-suited for control and instrumentation applications. Polyurethane is molded over a stainless steel cable, which serves as the belt’s force-transmitting spine. Many of these belts also include an aramid fiber (Kevlar) spine, which provides more flexibility. Additional benefits include:

There’s no backlash

Due to the lack of moving joints, plastic-molded belts are inherently flexible and precise. They represent the mold’s great precision and maintain it throughout the molding process.

No lubrication

These belts do not use metal-to-metal contact to transfer system torque. No lubrication is required at any time or pace. This enables the use of PU Timing Belts in important situations where dirt and other pollutants must be controlled, such as in medical applications.

Silent operation

These belts run quietly because there are no rubbing metal surfaces or metal-to-metal contact when the belt passes through the sprockets. PU timing belts are rust-proof due to their high-quality materials and manufacturing.

Flame resistant

Polyurethane is more flame resistant than other forms of polymers because when burned, it carbonizes rather than melts.

Lightweight

Plastic molded over stainless steel or aramid fiber wire reduces assembly weight compared to all-steel constructions.

End configurations

While many applications of molded plastic belts necessitate an infinite arrangement, there are times when reciprocating motion provides a significant benefit. The easily available spine enables these belts to be hard-mounted to a base or carriage using an end device that may be bolted or fastened to a suitable surface. These are the most effective ways to employ molded plastic belts because the steel spine’s full tensile strength may be utilized. 

Design Flexibility

The use of molded plastic belts allows designers more latitude in axis location. There is no need to examine catalogs to ensure that a specific center distance placement is permitted due to fixed belt size availability. PU Timing Belts have an endless range of lengths. The needed belt length is simply computed using the center distances and pulley diameters. These belts are suitable for use in assemblies with non-parallel sprocket axes.

Smaller assembly

Timing belts are commonly used to transmit data and information. Berg Flex-E-Grip molded plastic timing belts have several advantages. Molded plastic belts (the same size as rubber belts) offer higher strength and flexibility properties because of their steel spine. The innovative “no-walk” belt track removes the requirement for pulley flanges. Polyurethane molded timing belts may thus be employed in a smaller package since the pulleys are not broader than the belts.

The Applications of PU Timing Belts

Timing belts are made of rubber with robust teeth that may interlock with camshaft and crankshaft cogwheels. It is an internal combustion engine component that controls the rotation of the camshaft and crankshaft. Polyurethane timing belts allow engine valves to open and close properly throughout each cylinder’s intake and exhaust strokes.

In an interference engine, the timing belt also plays an important role in preventing the piston from striking the valves. Timing belts are usually toothed, with teeth on one or both sides of the surface.

What Role Do PU Timing Belts Play?

Timing belts are required for the proper operation of an automotive engine. They link the engine’s camshaft and crankshaft and regulate the vehicle’s valves and pistons. A timing belt is just a reinforced rubber band with teeth or notches on the inner side that separate it into its most basic components.

A PU timing belt precisely synchronizes the engine’s opening and closing valves. When the crankshaft turns, the timing belt moves in the proper direction. The timing belt will then rotate the camshaft, causing each valve to open or close and the pistons to move upward or downward. 

For example, four-stroke engines have four stages. These stages are the intake, combustion, compression, and exhaust phases. The intake phase involves sucking air and fuel into the cylinders. During this stage, the intake valves are open and the exhaust valves are closed to keep air from escaping. 

Timing Belt

During the combustion and compression stages, the air and fuel are combined, and compressed, and the spark plugs are ignited. During these two periods, all valves will be closed. The last stage is known as the exhaust phase, in which the remaining air and fuel are discharged through the exhaust valve. 

During this stage, the intake valves are closed while the exhaust valves remain open. The timing belt is the component that controls the timing of the valves and the movement of the pistons during each phase. The timing belt ensures that each step occurs in the correct sequence.

Comparison: Neoprene vs. PU Timing Belts

Neoprene and polyurethane timing belts are utilized in a variety of applications that need synchronous belting. When choosing the correct timing belt, it is critical to consider your project’s physical and environmental requirements, as various materials have different benefits and downsides.

Neoprene Timing Belt Characteristics

Neoprene timing belts are commonly constructed with a fiberglass rope core and can be strengthened with nylon facing to decrease wear and delamination. These synchronous belts are commonly used in combination with belt sprockets and timing belt pulleys. Some of their features are: 

• Audible noise reduction
• High shock absorption.
• Resistant to moisture-induced swelling.
• Resists twisting, flexing, and stretching under stress.
• Temperature resistant.

Polyurethane Timing Belt Characteristics:

Polyurethane (PU) timing belts are often made of polyurethane that has been molded over the synchronous belt’s stainless steel or aramid cable spine. Polyurethane belts are frequently used in conjunction with sprockets to provide slip-free mobility. Some of the physical properties and advantages of PU timing belt include:

• High chemical resistance.
• Strong abrasion resistance.
• Hardness leads to slower deterioration.
• Smooth operation under heavy loads. 
• Resists twisting, flexing, and stretching under stress.
• Resists wear and weariness.

Conclusion

PU polyurethane timing belts are suited for use in any industry that requires the simultaneous transmission of angular motion. They are therefore appropriate for all kinds of power transfer, indexing, positioning, and transporting. As one of the leading PU Timing Belt Manufacturers, DKTEE offers high-quality conveyor belts to satisfy the varied demands of industries for maximum usability and long-term outcomes.